CN117812737A

CN117812737A - Communication method and communication device

Info

Publication number: CN117812737A
Application number: CN202211225617.4A
Authority: CN
Inventors: 刘云峰; 郭志恒; 宋兴华; 谢信乾
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2024-04-02
Also published as: WO2024067499A1

Abstract

The present application provides a communication method and communication device. The method includes: a terminal device receives first indication information from a network device, where the first indication information indicates a first time-frequency resource on a first time unit; The terminal device determines the first time-frequency resource according to the first indication information. The first time-frequency resource is a resource that the terminal device cannot use for downlink transmission. The first time-frequency resource belongs to the first time-frequency resource. The second time-frequency resource on the time unit, the second time-frequency resource is the resource configured by the terminal device for uplink transmission; the terminal device is on the third time-frequency resource on the first time unit Downlink information from the network device is received, and the third time-frequency resource is a resource in the second time-frequency resource excluding the first time-frequency resource. The communication method provided by this application can improve resource utilization and improve the response rate of the communication system.

Description

Communication method and communication device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a communication method and a communication device.

Background

In a time division duplex (time division duplexing, TDD) system, the Downlink (DL) typically occupies the main time domain resources, which causes an imbalance in coverage between the DL and the Uplink (UL). Aiming at the problems of poor uplink coverage and large time delay in a TDD system, a technical scheme of sub-band full duplex (subband fullduplex, SBFD) is newly provided. In the SBFD scheme, the frequency domain resources on one slot include uplink resources and downlink resources. For example, the SBFD system divides one component carrier (component carrier, CC) into a plurality of subbands including at least one uplink subband (UL subband) and at least one downlink subband (DL subband) for transmitting an uplink signal and a downlink signal, respectively.

For resources on UL sub-bands, when the terminal device does not have UL data to transmit, the part of the resources will be idle, which will cause a certain resource waste. If the UL data is smaller, a part of resources in the UL sub-band is wasted when the UL sub-band cannot be occupied. Furthermore, if the network device has more DL data to transmit at this time, there may be no resources available or insufficient resources. Thus, the current mode of hard division of the frequency domain ranges of the DL and UL subbands will reduce the resource utilization of the SBFD system and will reduce the response rate of the communication system.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which can improve the utilization rate of resources and the response rate of a communication system.

In a first aspect, a communication method is provided, including: the terminal equipment receives first indication information from the network equipment, wherein the first indication information indicates first time-frequency resources on a first time unit; the terminal equipment determines the first time-frequency resource according to the first indication information, wherein the first time-frequency resource is a resource which cannot be used for downlink transmission by the terminal equipment, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource which is configured for uplink transmission by the terminal equipment; and the terminal equipment receives downlink information from the network equipment on third time-frequency resources on the first time unit, wherein the third time-frequency resources are resources in the second time-frequency resources except the first time-frequency resources.

According to the communication method provided by the embodiment of the application, the network device can send the first indication information to the terminal device, where the first indication information can indicate that a part of resources (i.e., first time-frequency resources) in the resources (i.e., second time-frequency resources) configured for uplink transmission by the terminal device cannot be used for downlink transmission, at this time, the terminal device can continue to use the first time-frequency resources for uplink transmission, and the terminal device can use resources (i.e., third time-frequency resources) other than the first time-frequency resources in the second time-frequency resources for downlink transmission. The secondary allocation of the uplink resources can be realized, so that the use of the resources is more flexible and reasonable, the allocation of the resources is more matched with the actual service demands, the problem that the resources are idle and wasted due to no data transmission of the terminal equipment is avoided, and the problem that the downlink transmission resources are not used enough can be solved, thereby improving the utilization rate of the resources and the response rate of a communication system.

In the first case, the first time-frequency resource belongs to the second time-frequency resource, and the first time-frequency resource may be equal to the second time-frequency resource, that is, the first time-frequency resource and the second time-frequency resource are identical. At this time, all resources in the second time-frequency resources cannot be used for downlink transmission (the third time-frequency resources are empty) under the indication of the first indication information.

In the second case, the first time-frequency resource belongs to the second time-frequency resource, which may be a non-null subset (nonvoid proper subset) of the second time-frequency resource, where, under the indication of the first indication information, the first time-frequency resource in the second time-frequency resource cannot be used for downlink transmission, and the resources (i.e., the third time-frequency resource) other than the first time-frequency resource in the second time-frequency resource can be used for downlink transmission.

In the third case, the first time-frequency resource belongs to the second time-frequency resource, and the first time-frequency resource may be an empty set (the empty set is a subset of any set), that is, the first time-frequency resource does not include any resource, where all the resources in the second time-frequency resource can be used for downlink transmission under the indication of the first indication information (where the third time-frequency resource is equal to the second time-frequency resource).

Optionally, the network device sends first indication information for indicating a first time-frequency resource to the terminal device, where the first time-frequency resource is a resource that cannot be used by the terminal device for downlink transmission, and in some cases, the terminal device can use the portion of the resource (i.e., the first time-frequency resource) for uplink transmission, for example, sending PUSCH and/or PUCCH.

Alternatively, the second time-frequency resource may be a continuous resource that forms a monolithic structure on the map, or may be a distributed resource (i.e. a discontinuous resource) formed by multiple independent resource blocks, which is not limited in this application.

The first time-frequency resource and the second time-frequency resource are resources on the first time unit, namely the starting positions of the time domains of the first time-frequency resource and the second time-frequency resource are the same, the ending positions of the time domains are the same, the time domains of the first time-frequency resource and the second time-frequency resource are the same, and the time domains of the first time-frequency resource and the second time-frequency resource are the same in range and different in bandwidth. For example, the first time unit may be one or more symbols or one or more time slots, but is not limited thereto, and may be any length of time.

Optionally, for the SBFD system, in a first time unit, the UL subband is used for uplink transmission and the DL subband is used for downlink transmission; in the second time unit, the whole CC is used for uplink transmission, namely, all the subbands are used for uplink transmission; in the third time unit, the entire CC is used for downlink transmission, i.e., all subbands are used for downlink transmission. Specifically, in fig. 5, the time-frequency resources corresponding to 5 slots (slots) including the slot #1 to the slot #5, where the time-frequency resources corresponding to the slot #1 are configured to be capable of performing only downlink data transmission (DL-only), which may be understood as a third time unit, the time-frequency resources corresponding to the slot #5 are configured to be capable of performing only uplink data transmission (UL-only), which may be understood as a second time unit, and the slots #2, #3, and #4 are all SBFD slots, the resources on DL subbands corresponding to the three slots are capable of performing DL transmission, and the resources on UL subbands corresponding to the three slots are capable of performing UL transmission, which may be understood as a first time unit.

Optionally, the first indication information in the present application indicates the first time-frequency resource, which may be a display indication or an implicit indication, or may be a direct indication or an indirect indication, which is not limited in this application.

For example, the first indication information may include Identification (ID), number, index (index), time domain information (such as a time domain start position, a time domain end position, a time domain center position, a time duration) of the first time-frequency resource, frequency domain information (such as a frequency domain start position, a frequency domain end position, a frequency domain center position, a bandwidth, a number of Resource Blocks (RBs)) of the first time-frequency resource, and any information capable of helping the terminal device determine the first time-frequency resource.

Alternatively, the first indication information may be carried in the downlink control information (downlink control information, DCI), where the first indication information may include a field composed of one or more bits (bits), and the field may be, for example, an existing field in the DCI or a newly added field, which is not limited in this application.

For example, the first indication information may include a rate matching indication field (Rate matching indicator) in the DCI.

In one possible implementation, the first time-frequency resource is one of N resources on the first time unit, where the N resources are different in size and include the second time-frequency resource and N-1 fourth time-frequency resources, where each of the N-1 fourth time-frequency resources is a subset of the second time-frequency resource, and N is an integer greater than or equal to 2.

The terminal equipment is configured with N resources with different sizes in advance, so that the network equipment can conveniently indicate, and at the moment, the terminal equipment can be helped to determine which of the first time-frequency resources is specific only by including a small part of information such as the identification or the index of the first time-frequency resources, so that the signaling overhead is saved. The N resources comprise N-1 fourth time-frequency resources, and the proportion of the N-1 fourth time-frequency resources to the second time-frequency resources is different, so that the network equipment can determine which of the N resources the first time-frequency resource is according to the actual service requirement, and the indication to the terminal equipment is convenient and efficient.

In one possible implementation, the frequency domain range of the second time-frequency resource is one uplink subband. I.e. the second time-frequency resource occupies 100% of the bandwidth of the uplink sub-band.

In one possible implementation, at least one of the N resources is configured by a rate matching pattern.

In one possible implementation, the terminal device is preconfigured with two rate matching pattern groups, and two resources of the N resources are respectively located in the two rate matching pattern groups.

In one possible implementation, the terminal device is preconfigured with N rate matching pattern groups, and the N resources are respectively contained in the N rate matching pattern groups.

In one possible implementation, the terminal device is configured with N resources, the N resources including one second time-frequency resource and N-1 fourth time-frequency resources, the N-1 fourth time-frequency resources each being a subset of the second time-frequency resources, and wherein one fourth time-frequency resource is an empty set. At this time, the terminal device may be configured with N-1 rate matching pattern groups, and N-1 resources other than the fourth time-frequency resource that is the null set among the N resources may be included in the N-1 rate matching pattern groups in a one-to-one correspondence. The first time-frequency resource may be indicated by means of a rate matching indication field at this time, and the first time-frequency resource may be any one of the N resources. For example, the value of N may be 3,4,5, 6, etc.

In one possible implementation manner, before the terminal device receives the first indication information from the network device, the method further includes: the terminal device receives configuration information of the N resources from the network device.

The network device may configure the N resources for the terminal device in a semi-static configuration. For example, the network device may send configuration information of the N resources to the terminal device, where the configuration information may be carried in a radio resource control (radio resource control, RRC) message, and after the terminal device receives the configuration information, the terminal device configures the N resources according to the configuration information.

In a possible implementation manner, the first time-frequency resource may include a symbol where a valid RO is located and/or N before the symbol _gap And a symbol.

In one possible implementation, the first indication information includes a rate matching indication field and/or a rate matching section field.

In one possible implementation, the first indication information is carried in DCI, and may include an existing field or a newly added field in the DCI.

In a second aspect, a communication method is provided that includes: comprising the following steps: the method comprises the steps that network equipment sends first indication information to terminal equipment, wherein the first indication information indicates first time-frequency resources on a first time unit, the first time-frequency resources are resources which cannot be used for downlink transmission by the terminal equipment, the first time-frequency resources belong to second time-frequency resources on the first time unit, and the second time-frequency resources are resources which are configured by the terminal equipment and are used for uplink transmission; and the network equipment sends downlink information to the terminal equipment on third time-frequency resources on the first time unit, wherein the third time-frequency resources are resources in which the first time-frequency resources are removed from the second time-frequency resources.

In one possible implementation, the frequency domain range of the second time-frequency resource is one uplink subband.

In one possible implementation, the terminal device is preconfigured with N rate matching pattern groups, and the N resources are respectively located in the N rate matching pattern groups.

In a third aspect, a terminal device is provided, including a receiving unit, configured to receive first indication information from a network device, where the first indication information indicates a first time-frequency resource on a first time unit; a determining unit, configured to determine, according to the first indication information, the first time-frequency resource, where the first time-frequency resource is a resource that cannot be used for downlink transmission by the terminal device, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource configured for uplink transmission by the terminal device; the receiving unit is further configured to receive downlink information from the network device on a third time-frequency resource on the first time unit, where the third time-frequency resource is a resource excluding the first time-frequency resource from the second time-frequency resource.

In a fourth aspect, there is provided a network device comprising: a sending unit, configured to send first indication information to a terminal device, where the first indication information indicates a first time-frequency resource on a first time unit, where the first time-frequency resource is a resource that cannot be used for downlink transmission by the terminal device, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource configured by the terminal device and used for uplink transmission; the sending unit is further configured to send downlink information to the terminal device on a third time-frequency resource on the first time unit, where the third time-frequency resource is a resource in the second time-frequency resource excluding the first time-frequency resource.

In a fifth aspect, embodiments of the present application provide a communication device. The communication means may be a terminal device or a chip provided in the terminal device. The communication device includes: a processor, a memory, and a transceiver;

The transceiver is used for receiving and transmitting the message;

the memory is used for storing instructions;

the processor is configured to execute the memory-stored instructions, which when executed by the processor, cause the communication device to perform the method performed by any one of the implementations of the first aspect described above.

In a sixth aspect, embodiments of the present application provide a communication device. The communication means may be a network device or a chip provided in the network device. The communication device includes: a processor, a memory, and a transceiver;

the transceiver is used for receiving and transmitting the message;

the memory is used for storing instructions;

the processor is configured to execute the memory-stored instructions, which when executed by the processor, cause the communication device to perform the method performed by any one of the implementations of the second aspect described above.

In a seventh aspect, a terminal device is provided, comprising at least one processor configured to couple with a memory, read and execute instructions in the memory, to implement a method performed by any one of the implementations of the first aspect.

Optionally, the terminal device further comprises the memory.

In an eighth aspect, there is provided a network device comprising at least one processor for coupling with a memory, reading and executing instructions in the memory to implement a method performed by any one of the implementations of the second aspect.

Optionally, the terminal device further comprises the memory.

In a ninth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method performed by any one of the implementations of the first or second aspects described above.

It should be noted that, the computer program code may be stored in whole or in part on a first storage medium, where the first storage medium may be packaged together with the processor or may be packaged separately from the processor, which is not specifically limited in this application.

In a tenth aspect, there is provided a computer readable medium storing program code which, when run on a computer, causes the computer to perform the method performed by any one of the implementations of the first or second aspects described above.

In an eleventh aspect, there is provided a chip system comprising a processor for calling and running a computer program from a memory, causing a communication device in which the chip system is installed to perform a method of causing a computer to perform any one of the implementations of the first or second aspects described above.

A twelfth aspect provides a communication system comprising at least one of the terminal device provided in the third or seventh aspect, the network device provided in the fourth or eighth aspect.

In a thirteenth aspect, there is provided a communication method comprising: the network equipment sends first indication information, and the terminal equipment receives the first indication information, wherein the first indication information indicates first time-frequency resources on a first time unit; the terminal equipment determines the first time-frequency resource according to the first indication information, wherein the first time-frequency resource is a resource which cannot be used for downlink transmission by the terminal equipment, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource which is configured for uplink transmission by the terminal equipment; the network equipment sends downlink information on a third time-frequency resource on the first time unit, and the terminal equipment receives the downlink information on the third time-frequency resource on the first time unit, wherein the third time-frequency resource is a resource which removes the first time-frequency resource from the second time-frequency resource.

Drawings

Fig. 1 shows a schematic diagram of a communication system suitable for use in embodiments of the present application.

Fig. 2 is a schematic diagram of an example of TDD system resource allocation according to an embodiment of the present application.

Fig. 3 is a schematic diagram of an example of SBFD system resource configuration according to an embodiment of the present application.

Fig. 4 is a schematic diagram of an example of SFFD system resource configuration provided in an embodiment of the present application.

Fig. 5 is a schematic diagram of another example of SBFD system resource configuration according to an embodiment of the present application.

Fig. 6 is a schematic diagram of another example of SBFD system resource configuration according to an embodiment of the present application.

Fig. 7 is a schematic flowchart of an example of a communication method provided in the present application.

Fig. 8 is a schematic diagram illustrating an example of configuring rate matching pattern resources according to an embodiment of the present application.

Fig. 9 is a schematic diagram of an example of indicating a rate matching pattern resource according to an embodiment of the present application.

Fig. 10 is a schematic diagram of an example of indicating a first time-frequency resource by rate matching provided in the present application.

Fig. 11 is a schematic diagram illustrating an example of downlink transmission by the third time-frequency resource.

Fig. 12 is a schematic diagram of another example of indicating the first time-frequency resource by rate matching provided in the present application.

Fig. 13 is a schematic diagram of another example of downlink transmission through the third time-frequency resource.

Fig. 14 is a schematic diagram of still another example of indicating the first time-frequency resource by rate matching provided in the present application.

Fig. 15 is a schematic diagram illustrating another example of downlink transmission by the third time-frequency resource.

Fig. 16 is a schematic diagram of indicating a first time-frequency resource by a bitmap according to an embodiment of the present application.

FIG. 17 is an effective RO and its top N _gap Schematic of the symbols.

Fig. 18 is a schematic block diagram of a terminal device provided in an embodiment of the present application.

Fig. 19 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

Fig. 20 is a schematic block diagram of a network device provided in an embodiment of the present application.

Fig. 21 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (global system for mobile communications, GSM), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA) systems, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) systems, LTE frequency division duplex (frequency division duplex, FDD) systems, LTE time division duplex (time division duplex, TDD), sub-band full duplex (subband fullduplex, SBFD) systems, common frequency full duplex (single frequency fullduplex, SFFD), general mobile communication systems (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication systems, fifth generation (5th generation,5G) communication systems, new radio access technology (new radio access technology, NR), future communication systems (e.g., sixth generation (6th generation,6G) communication systems), and the like.

To facilitate an understanding of the embodiments of the present application, a communication system suitable for use in the embodiments of the present application will be described in detail with reference to fig. 1. Fig. 1 shows a schematic diagram of a communication system suitable for use in embodiments of the present application. As shown in fig. 1, the communication system 100 may include at least one network device, such as the network device 110 shown in fig. 1; the communication system 100 may also include at least one terminal device, such as terminal device 120 and terminal device 130 shown in fig. 1. Network device 110 may communicate with terminal device 120, terminal device 130 via wireless links. Each communication device, such as network device 110, terminal device 120, or terminal device 130, may be configured with multiple antennas that may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. In addition, each communication device may additionally include a transmitter chain and a receiver chain, each of which may include a plurality of components (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.) associated with the transmission and reception of signals, as will be appreciated by one skilled in the art. Thus, network device 110 may communicate with terminal device 120, terminal device 130 via multiple antenna techniques.

It should be understood that the network device in the wireless communication system may be any device having a wireless transceiving function. The apparatus includes, but is not limited to: an evolved NodeB (eNB or eNodeB), a radio network controller (radio network controller, RNC), a NodeB (Node B, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay Node, a wireless backhaul Node, a transmission point (transmission point, TP), or a transmission reception point (transmission and reception point, TRP), etc., may also be 5G, e.g., NR, a gNB in a system, or a transmission point (TRP or TP), one or a group (including multiple antenna panels) of base stations in a 5G system, or may also be a network Node constituting a gNB or transmission point, e.g., a baseband unit (BBU), or a Distributed Unit (DU), etc.

In some deployments, the gNB may include a Centralized Unit (CU) and DUs. The gNB may also include a Radio Unit (RU). The CU implements part of the functions of the gNB, the DU implements part of the functions of the gNB, for example, the CU implements functions of a radio resource control (radio resource control, RRC), a packet data convergence layer protocol (packet data convergence protocol, PDCP) layer, and the DU implements functions of a radio link control (radio link control, RLC), a medium access control (media access control, MAC), and a Physical (PHY) layer. Since the information of the RRC layer may eventually become information of the PHY layer or be converted from the information of the PHY layer, under this architecture, higher layer signaling, such as RRC layer signaling, may also be considered to be transmitted by the DU or by the du+cu. It is understood that the network device may be a CU node, or a DU node, or a device comprising a CU node and a DU node. In addition, the CU may be divided into network devices in an access network (radio access network, RAN), or may be divided into network devices in a Core Network (CN), which is not limited in this application.

It should also be appreciated that the terminal device in the wireless communication system may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), or the like. The embodiments of the present application are not limited to application scenarios.

It should be understood that the foregoing is merely some examples of the communication system related to the present application, and the communication method and the communication system to which the communication device is applied provided in the present application may include, but are not limited to, the foregoing communication system. To facilitate understanding of the embodiments of the present application, a brief description of related art content referred to in the present application will be first provided.

A 5G New Radio (NR) wireless communication system is deployed in a medium-high band, and high data rate and low delay are achieved by using a large bandwidth. In a time division duplex (time division duplexing, TDD) system, the Downlink (DL) typically occupies the main time domain resources, which causes an imbalance in coverage between the DL and the Uplink (UL). Fig. 2 is a schematic diagram of an example of resource allocation in a TDD system provided in the embodiment of the present application, as shown in fig. 2, the time domain resources occupied by DL are significantly more than UL, and compared with a frequency division duplex (frequency division duplexing, FDD) system, uplink coverage of the TDD system is worse and time delay is larger.

Aiming at the problems of uplink coverage and time delay in a TDD system, a scheme of sub-band full duplex (subband fullduplex, SBFD) and common frequency full duplex (single frequency fullduplex, SFFD) is proposed in R18 standard, fig. 3 is a schematic diagram of an example of the resource allocation of the SBFD system provided in the embodiment of the present application, and fig. 4 is a schematic diagram of an example of the resource allocation of the SFFD system provided in the embodiment of the present application. As shown in fig. 3, in the SBFD scheme, the frequency domain resources on one slot include uplink resources and downlink resources. For example, the SBFD system divides one component carrier (component carrier, CC) into a plurality of subbands including at least one uplink subband (UL subband) and at least one downlink subband (DL subband) for transmitting an uplink signal and a downlink signal, respectively. As a typical SBFD scheme, each CC may include 3 subbands, and a subband located in the middle in the frequency domain is an uplink subband (UL subband), and the upper and lower 2 subbands are downlink subbands (DL subbands). As shown in fig. 4, in the SFFD scheme, simultaneous transmission and reception on one symbol (symbol) can be achieved on the entire CC. It is considered that in the SBFD system, different frequency domain resources (subbands) are used for uplink and downlink, and in the SFFD system, the same frequency domain resource is used for uplink and downlink. The technical scheme provided by the embodiment of the application mainly relates to an SBFD system.

Currently, in conference discussions for the R18 standard, most participants support a technical research route employing "network device side sub-band full duplex, terminal device side half duplex". Terminal equipment half duplex refers to that the terminal equipment can only receive or transmit on one symbol and can not receive or transmit at the same time. Under the scheme, the available uplink transmission resources of the terminal equipment are increased, and compared with a traditional TDD system, the coverage of the UL can be effectively improved, and the time delay of the UL is reduced.

As shown in fig. 1, the network device 110 may have at least one SBFD cell, where the terminal device 120 and the terminal device 130 are both located in the SBFD cell, and the terminal device 120 and the terminal device 130 may be both terminal devices in half duplex mode, at which time, the terminal device 120 may send data to the network device 110 through UL, and the terminal device 130 may receive data from the network device 110 through DL.

In 5G NR, the direction (type) of one symbol in a conventional TDD system may be configured as uplink, downlink, or flexible (flexible). The direction of one symbol is configured for the entire CC. In the SBFD system, the transmission directions of different subbands may be different on one symbol, that is, some subbands are uplink and some subbands are downlink. At this time, there is a difference in symbol direction of different subbands within 1 CC. For example, on the same symbol, the symbol direction on the subband 1 is configured as downlink, the symbol direction on the subband 2 is configured as uplink, and the terminal device may send an uplink signal on the symbol of the subband 2.

The SBFD system includes UL subbands, which are typically used for uplink data transmission only, and DL subbands, which are typically used for downlink data transmission only. In the DL transmission process, when the network device performs resource allocation of the physical downlink shared channel (physical downlink shared channel, PDSCH) of Type 1 (Type 1), the network device can avoid unavailable resources by means of resource reservation, so that the time-frequency resources occupied by DL transmission and UL subbands are not overlapped. Fig. 5 is a schematic diagram of another example of the SBFD system resource configuration according to the embodiment of the present application, where as shown in fig. 5, DL transmission needs to avoid the time-frequency resource where UL sub-band is located.

Specifically, in fig. 5, the total of 5 slots (slots) including slot #1 to slot #5 corresponds to a time-frequency resource, wherein the time-frequency resource corresponding to slot #1 is configured to be capable of only downlink data transmission (DL-only), the time-frequency resource corresponding to slot #5 is configured to be capable of only uplink data transmission (UL-only), and each of slot #2, slot #3, and slot #4 is an SBFD slot, and resources on DL subbands corresponding to the three slots are capable of DL transmission, and resources on UL subbands corresponding to the three slots are capable of UL transmission. In the allocation of resources of PDSCH, the time-frequency resources where UL subbands are located should be avoided, for example, the transmission of DL data should not occupy resources on UL subbands corresponding to slot #2, slot #3, and slot #4 (i.e., UL subband resources indicated by diagonal lines in fig. 5), even when the above resources are not used for UL transmission (i.e., in idle state).

In combination with the above analysis, for the resources on the UL sub-band, when the terminal device does not have UL data to transmit, the resources will be idle, which will cause a certain resource waste. If the UL data is smaller, a part of resources in the UL sub-band is wasted when the UL sub-band cannot be occupied. Furthermore, if the network device has more DL data to transmit at this time, there may be no resources available or insufficient resources. Thus, the current mode of hard division of the frequency domain ranges of the DL and UL subbands will reduce the resource utilization of the SBFD system and will reduce the response rate of the communication system.

In view of the above problems, embodiments of the present application provide a communication method, by which uplink resources can be reasonably secondarily allocated, so that a portion of the resources on an UL sub-band can be used for DL transmission, that is, DL scheduling can use the resources on the UL sub-band, thereby avoiding resource waste, improving the utilization rate of the resources, and improving the response rate of a communication system.

Fig. 6 is a schematic diagram of another example of the SBFD system resource configuration provided in the embodiment of the present application, taking fig. 6 as an example, according to the communication method provided in the embodiment of the present application, DL transmission may use a time-frequency resource where an UL subband is located (the resource type of the time-frequency resource is generally configured as uplink, where some resources may be configured flexibly), and only the time-frequency resource where UL transmission is located needs to be avoided, that is, UL resources that are not used for UL transmission may be used for DL transmission. For example, all of the resources on the UL sub-band corresponding to slot #2 in fig. 6 may be used for DL transmission, while a portion of the resources on the UL sub-band corresponding to slot #3 may be used for DL transmission. At this time, the available frequency domain range of DL transmission is increased, which is beneficial to improving the spectrum efficiency of the network and the response rate of the system, so that the allocation and use of resources are more reasonable.

In the following description of the communication method provided in the embodiments of the present application with reference to the drawings, the network device in the embodiments may be the network device 110 in fig. 1, and the terminal device may be the terminal device 120 or the terminal device 130 in fig. 1.

Fig. 7 is a schematic flow chart of a communication method 700 provided herein. A communication method 700 provided in an embodiment of the present application is described below with reference to fig. 7, where the method 700 includes:

in step 710, the network device sends first indication information to the terminal device, where the first indication information indicates a first time-frequency resource on a first time unit.

Accordingly, in step 710, the terminal device receives first indication information from the network device.

In step 720, the terminal device determines a first time-frequency resource according to the first indication information, where the first time-frequency resource is a resource that cannot be used for downlink transmission by the terminal device, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource configured for uplink transmission by the terminal device, for example, a resource actually on the UL subband.

In step 730, the network device sends downlink information to the terminal device on a third time-frequency resource, where the third time-frequency resource is a resource excluding the first time-frequency resource from the second time-frequency resource. That is, the third time-frequency resource is a complement of the first time-frequency resource in the second time-frequency resource.

Accordingly, in step 730, the terminal device receives downlink information from the network device on the third time-frequency resource.

The terminal device and the network device in the embodiments of the present application may be communication devices belonging to the foregoing SBFD system, or may be communication devices belonging to an SFFD system, a TDD system, an FDD system, or communication devices belonging to any other system, which is not limited in this application. The network device in the embodiment of the present application may be a terminal device in a half duplex mode, or may be a terminal device in a full duplex mode, which is not limited in this application.

Further, the network device may pre-configure the terminal device with the second time-frequency resource to meet the communication requirement of the terminal device and the network device. The second time-frequency resource may be a resource configured for uplink transmission, on which the terminal device may send uplink data to the network device, e.g., the terminal device may send a physical uplink shared channel (physical uplink shared channel, PUSCH) and/or a physical uplink control channel (physical uplink control channel, PUCCH) to the network device.

The second time-frequency resource is a resource configured for uplink transmission by the terminal device, and in some cases, some or all of the second time-frequency resource can also be used for downlink transmission. For example, the second time-frequency resources can also be used to transmit PDSCH and/or physical downlink control channel (physical downlink control channel, PDCCH). Therefore, the network device needs to further instruct the terminal device to inform the terminal device which resources in the second time-frequency resources cannot be used for downlink transmission, and the resources are the first time-frequency resources. And the resources (i.e. third time-frequency resources) except the first time-frequency resources in the second time-frequency resources, the terminal equipment can use the third time-frequency resources for downlink transmission according to the specification of the system or the protocol or through the agreement of the network equipment and the terminal equipment.

The network device sends first indication information for indicating the first time-frequency resource to the terminal device, and the terminal device can determine the first time-frequency resource according to the first indication information. The first time-frequency resource is a resource that the terminal device cannot use for downlink transmission, and the first time-frequency resource belongs to the second time-frequency resource, i.e. the first time-frequency resource may be a subset (subset) of the second time-frequency resource. That is, in the embodiment of the present application, the first indication information indicates that resources that cannot be used for downlink transmission in the second time-frequency resource, in addition to this, according to a rule of a system or a protocol, or through a convention of a network device and a terminal device, the terminal device may further determine that resources other than the first time-frequency resource in the second time-frequency resource (that is, a complement of the first time-frequency resource located in the second time-frequency resource, that is, a third time-frequency resource) can be used for downlink transmission, and the terminal device can receive downlink information from the network device on the third time-frequency resource.

For example, the second time-frequency resource is { resource #1, resource #2, resource #3}, and in the first case, the first time-frequency resource is also { resource #1, resource #2, resource #3}, and at this time, the terminal device cannot use the above-mentioned resource #1, resource #2, resource #3 for downlink transmission under the instruction of the first instruction information. In the second case, the first time-frequency resource is { resource #1, resource #2}, and at this time, the terminal device cannot perform downlink transmission using the above-mentioned resource #1 and resource #2, but may perform downlink transmission using resource #3, under the instruction of the first instruction information. In the third case, the first time-frequency resource is an empty set { }, and at this time, the terminal device may use resource #1, resource #2, and resource #3 for downlink transmission under the indication of the first indication information.

At this time, according to the specification of the system or the protocol, or through the agreement of the network device and the terminal device, after receiving the first indication information, the terminal device may further determine that the first time-frequency resource can be used for uplink transmission. That is, for the second time-frequency resources which are themselves configured for uplink transmission, for the first time-frequency resources in which the first indication information is further indicated, the terminal device determines that uplink transmission can be continued, and resources other than the first time-frequency resources (i.e., third time-frequency resources which are not indicated) in the second time-frequency resources can be used for downlink transmission.

In the description of the present application, the first time-frequency resource, the second time-frequency resource, the third time-frequency resource, and a fourth time-frequency resource that will appear later are all resources on the first time unit. That is, the starting positions of the time domains of the four time-frequency resources are the same, the ending positions of the time domains are the same, and the time domain ranges of the four time-frequency resources are the same (overlap). More often, the four time-frequency resources are differentiated by bandwidth.

For example, the first indication information may include a rate matching indication field (Rate matching indicator) in the DCI, and how the first time-frequency resources are indicated by the rate matching indication field is further described below.

The communication method provided in the embodiment of the present application will be described by taking the content shown in fig. 6 as an example. As shown in fig. 6, according to the communication method provided in the embodiment of the present application, the network device may send first indication information to the terminal device, where the first indication information indicates that a first time-frequency resource in resources (i.e., second time-frequency resources, resources defined by a dashed box in fig. 6) on the UL subband corresponding to the slot #3 (i.e., the first time unit) cannot be used for downlink transmission, where a bandwidth of the second time-frequency resource may occupy 100% of the bandwidth of the UL subband, and a bandwidth of the first time-frequency resource may occupy 50% of the bandwidth of the UL subband. At this time, the terminal device may use resources other than the first time-frequency resource (i.e., the third time-frequency resource, accounting for another 50% of the bandwidth of the UL subband) in the second time-frequency resource for downlink transmission (DL transmission), and may use the first time-frequency resource for uplink transmission (UL transmission). Therefore, hard division of a time-frequency range of the UL sub-band and the DL sub-band is avoided, so that partial resources on the UL sub-band can be used for DL transmission, resource waste can be avoided, and the response rate of a communication system can be improved.

In one possible implementation, the first time-frequency resource is one of N resources on the first time unit, for example, the N resources are resources that are preconfigured by the network device for the terminal device, the N resources are different in size and include the second time-frequency resource and N-1 fourth time-frequency resources, and the N-1 fourth time-frequency resources are all subsets of the second time-frequency resource, where N is an integer greater than or equal to 2. For example, the value of N may be 3, 4, or 5.

Here, N resources are resources on the same time unit and are different in size, so that the starting positions of the time domains of the N resources are the same, and the ending positions of the time domains are the same, that is, the time domain ranges of the N resources are the same, but the bandwidths are different.

Alternatively, the value of N may be 2, where there is only one fourth time-frequency resource, and the proportion of the second time-frequency resource (that is, the bandwidth proportion) occupied by the size of the only one fourth time-frequency resource may be defined by the network device according to the actual situation, for example, the size of the fourth time-frequency resource is 50% of the size of the second time-frequency resource (that is, the bandwidth of the fourth time-frequency resource occupies 50% of the bandwidth of the second time-frequency resource). At this time, if there is no data to be transmitted in downlink, the first indication information may indicate the second time-frequency resource (at this time, the first time-frequency resource is the second time-frequency resource, and the third time-frequency resource occupies 0% of the second time-frequency resource). If there is data to be transmitted in downlink, the first indication information may indicate a fourth time-frequency resource (where the first time-frequency resource is equal to the fourth time-frequency resource, and the third time-frequency resource accounts for 50% of the second time-frequency resource). That is, at this time, the network device may use 0% or 50% of the second time-frequency resource for downlink transmission.

Alternatively, the value of N may be 3, where there are two fourth time-frequency resources, and the proportions of the second time-frequency resources occupied by the two fourth time-frequency resources are different. For example, the size of the fourth time-frequency resource (1) is 50% of the size of the second time-frequency resource. The size of the fourth time-frequency resource (2) is 0% of the size of the second time-frequency resource (i.e. the fourth time-frequency resource (2) does not include any resources at this time, and is an empty set). At this time, if more resources are required for downlink transmission, the first indication information may indicate the fourth time-frequency resource (2) (i.e., the first time-frequency resource is the fourth time-frequency resource (2) at this time, and the third time-frequency resource occupies 100% of the second time-frequency resource). If less resources are needed for downlink transmission at this time, the first indication information may indicate the fourth time-frequency resource (1) (i.e., the first time-frequency resource is the fourth time-frequency resource (1) at this time, and the third time-frequency resource accounts for 50% of the second time-frequency resource). If no downlink transmission is required at this time, or no additional resources are required for downlink transmission, the first indication information may indicate the second time-frequency resource (i.e., the first time-frequency resource is the second time-frequency resource at this time, and the third time-frequency resource occupies 0% of the second time-frequency resource). That is, at this time, the network device may use 0%, 50% or 100% of the second time-frequency resource for downlink transmission.

It should be noted that, when the first indication information indicates the second time-frequency resource, since the third time-frequency resource is an empty set, no resource is included, and thus the foregoing step 730 may be omitted.

Alternatively, the value of N may be 3, where there are two fourth time-frequency resources, and the proportions of the second time-frequency resources occupied by the two fourth time-frequency resources are different. For example, the size of the fourth time-frequency resource (1) is 30% of the size of the second time-frequency resource. The size of the fourth time-frequency resource (2) is 60% of the size of the second time-frequency resource. At this point the network device may indicate any of these 3 resources according to the actual traffic demand. At this time, when the first indication information indicates the fourth time-frequency resource (1), the fourth time-frequency resource (2) and the second time-frequency resource, respectively, the network device may use 70%, 40% or 0% of the second time-frequency resource for downlink transmission.

Alternatively, the value of N may be 4, where there are 3 fourth time-frequency resources, and the ratio of the 3 fourth time-frequency resources to the second time-frequency resources is different. For example, the size of the fourth time-frequency resource (1) is 25% of the size of the second time-frequency resource. The size of the fourth time-frequency resource (2) is 50% of the size of the second time-frequency resource, and the size of the fourth time-frequency resource (3) is 75% of the size of the second time-frequency resource. At this time, when the first indication information indicates the fourth time-frequency resource (1), the fourth time-frequency resource (2), the fourth time-frequency resource (3) and the second time-frequency resource, respectively, the network device may use 75%, 50%, 25% or 0% of the second time-frequency resource for downlink transmission.

The system or the protocol can define the value of N according to the actual situation, the larger the value of N is, the more flexible and diversified the indication of the network equipment is, and the greater the selectivity is, so that the matching degree between the size of the third time-frequency resource and the actual downlink transmission requirement is higher, thereby being beneficial to saving resources and improving the utilization rate of the resources, and further being capable of improving the spectrum utilization efficiency of the whole cell.

It should be understood that "protocol" in the embodiments of the present application may refer to a standard protocol in the field of communications, and may include, for example, LTE protocol, NR protocol, and related protocols applied in future communication systems (e.g., 6G), which is not limited in this application.

Optionally, as shown in fig. 7, before step 710, method 700 further includes:

in step 740, the network device sends the configuration information of the N resources to the terminal device.

Accordingly, in step 740, the terminal device receives configuration information of the N resources from the network device.

Referring to fig. 6, in the embodiment of the present application, the second time-frequency resource may be a time-frequency resource on the UL subband in the SBFD system described above. For example, the second time-frequency resource is one UL subband. I.e. the bandwidth of the second time-frequency resource is 100% of the bandwidth of the UL sub-band. The first time unit may be one or more time slots (or symbols) on the UL subband at this time.

Alternatively, for the terminal device located in the SBFD system, the terminal device may default that the time-frequency resources on the UL subband are both the second time-frequency resources. At this time, according to the periodic indication of the network device, a part of resources in the second time-frequency resource may be used for downlink transmission.

How the first indication information indicates the first time-frequency resource is further described below with reference to the accompanying drawings. In the embodiment of the present application, at least one of the N resources is configured by a rate matching pattern (RateMatchPattern), or, at least one of the N resources may be a rate matching pattern resource. In the expression of the present application, a certain resource is a rate matching pattern resource, which is equivalent to the configuration of the resource by the rate matching pattern. The first time-frequency resource may be indicated at this time by means of a rate matching indication field in the DCI field. For ease of understanding, the relevant content of rate matching will be first described herein.

The network device may configure (e.g., may configure via RRC signaling) a plurality of rate matching pattern resources and a maximum of two (e.g., 0, 1, or 2) rate matching pattern groups (rateematchpattern groups) through semi-static configuration. Each rate matching pattern group includes a number (e.g., 1-8) of rate matching pattern resources, although it is possible that a number of rate matching pattern resources are not included in any one rate matching pattern group. Each rate matching pattern resource has a rate matching pattern identifier (ratematchpattern id), and each rate matching pattern group may include 1 or more rate matching pattern resources corresponding to the rate matching pattern identifier. In the expression of the present application, a rate matching pattern group includes a certain rate matching pattern resource, which is equivalent to the identity of the rate matching pattern group including the rate matching pattern resource.

Fig. 8 is a schematic diagram illustrating an example of configuring rate matching pattern resources according to an embodiment of the present application. As shown in fig. 8, the network device may configure the terminal device with 8 rate matching pattern resources (each block in fig. 8 represents one rate matching pattern resource) and two rate matching pattern groups (i.e., group1 and group2 in fig. 8), each of which includes two rate matching pattern resources, and 4 rate matching pattern resources are not included in any one of the groups.

Fig. 9 is a schematic diagram of an example of indicating a rate matching pattern resource according to an embodiment of the present application. As shown in fig. 9, which or which rate matching pattern resources are reserved for the terminal device may be indicated by DCI in format 1-1, and in this embodiment, the reserved resources (e.g., the indicated first time-frequency resources) cannot be used by the terminal device for downlink transmission. In some cases, the resource may be used for uplink transmission. Without the need for reserved resources (e.g., third time-frequency resources), the terminal device can be used for downlink transmission.

As shown in fig. 9, the network device may indicate, through a rate matching indication field in the DCI, which resources of the terminal device need to be reserved (i.e., cannot be used for downlink transmission), and the terminal device determines that the rate matching pattern resources included in the rate matching pattern group indicated by the rate matching indication field, and the rate matching pattern resources not included in both the rate matching pattern group1 (group 1) and the rate matching pattern group2 (group 2) need to be reserved. According to the current protocol, the terminal device defaults to a certain reservation of rate matching pattern resources that are not included in the rate matching pattern group.

As shown in fig. 9, when the value of the rate matching indication field is 00 or does not contain any value (the field is 0 bit at this time), the network device does not indicate any resources in group1 (group 1) and group2 (group 2), and at this time, according to the protocol, the terminal device defaults to reserve 4 resources located outside the group. When the value of the rate matching indication field is 10, the network device indicates that two resources within the terminal device group1 and 4 resources located outside the group need to be reserved. When the value of the rate matching indication field is 01, the network device indicates that two resources within the terminal device group2 and 4 resources located outside the group need to be reserved. When the value of the rate matching indication field is 11, the network device indicates that two resources within the terminal device group1 and two resources within the group2, and 4 resources located outside the group need to be reserved. The black boxes in fig. 9 indicate that the resource needs to be reserved, and the open boxes indicate that the resource does not need to be reserved.

In combination with the above, it can be known that the indication of the first time-frequency resource can be implemented in a rate matching manner. That is, in the embodiment of the present application, at least one of the aforementioned N resources may be a rate matching pattern resource, for example, a portion of the N resources are configured as rate matching pattern resources, or all of the N resources are configured as rate matching pattern resources, which is not limited in the present application. Alternatively, at least one of the N resources may be configured by a rate matching pattern, for example, a portion of the N resources may be configured by a rate matching pattern, or all of the N resources may be configured by a rate matching pattern, which is not limited in this application. The first indication information may then comprise a rate matching indication field, i.e. the network device may indicate the first time-frequency resource by means of the rate matching indication field.

Alternatively, the rate matching indication field may be a field consisting of 1 or more bits 0 or 1. For example, the rate matching indication field may be a field consisting of 2, 3, or 4 bits of 0 or 1. The specific length of the rate matching indication field may be defined according to practical requirements, which is not limited in this application.

Fig. 10 is a schematic diagram of an example of indicating a first time-frequency resource by rate matching according to an embodiment of the present application. Fig. 11 is a schematic diagram illustrating an example of downlink transmission by the third time-frequency resource. In this embodiment of the present application, the terminal device is preconfigured with two rate matching pattern groups, where two resources of the N resources are located in the two rate matching pattern groups, respectively, that is, one resource of the N resources is included in one rate matching pattern group, and another resource of the N resources is included in another rate matching pattern group.

Specifically, as shown in fig. 10 and 11, in the embodiment of the present application, the terminal device is preconfigured with 3 resources (i.e., N has a value of 3), including one second time-frequency resource and two fourth time-frequency resources, where the ratio (bandwidth) of the two fourth time-frequency resources to the second time-frequency resource is different. The bandwidth of the fourth time-frequency resource (1) is 50% of the bandwidth of the second time-frequency resource (50% is an example, and the specific value can be redefined according to the actual requirement). The bandwidth of the fourth time-frequency resource (2) is 0% of the bandwidth of the second time-frequency resource (i.e. the fourth time-frequency resource (2) does not include any resources at this time, is an empty set, and the fourth time-frequency resource (2) is not shown in fig. 10). The second time-frequency resource is an UL subband, i.e. occupies 100% of the bandwidth of the UL subband, and the first time unit can be used to characterize the location of the time-frequency resource reserved by the UL subband. The fourth time-frequency resource is the same as the time-domain range of the second time-frequency resource, i.e. the bandwidth of the fourth time-frequency resource (1) occupies 50% of the bandwidth of the UL sub-band.

It will be appreciated that the fourth time-frequency resource (2) is empty and the configuration information is either empty or no configuration is required. In the expression of the present application, for resources that are empty, for example, the fourth time-frequency resource (2) herein, the resource configuration information may be empty or need not be configured, which will not be described in detail later.

The terminal device is further configured with two sets of rate matching patterns (i.e. set 1 and set 2), the second time-frequency resource and the fourth time-frequency resource (1) being both rate matching pattern resources, the second time-frequency resource being comprised in set 1 and the fourth time-frequency resource (1) being comprised in set 2. The first time-frequency resource may be indicated by a rate matching indication field in the DCI, and the first time-frequency resource may be any one of the 3 resources described above.

As shown in part (a) of fig. 10 and 11, the network device transmits first indication information to the terminal device, where the first indication information includes a rate matching indication field, the rate matching indication field may be 00 or the field is 0 bit, where the terminal device determines that the first time-frequency resource indicated by the network device is a fourth time-frequency resource (2) according to the first indication information (i.e., the fourth time-frequency resource (2) of the N resources is indicated), and where the terminal device determines that the third time-frequency resource is 100% bandwidth of the second time-frequency resource (i.e., UL subband) because the fourth time-frequency resource (2) (accounting for 0% bandwidth of the UL subband) is an empty set excluding any resource, and may use 100% bandwidth of the UL subband for DL transmission. The available frequency domain range of DL transmission increases, which is beneficial to improving the spectrum efficiency of the network.

As shown in part (b) of fig. 10 and 11, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, and the rate matching indication field may be 01, where the terminal device determines, according to the first indication information, that the first time-frequency resource indicated by the network device is a fourth time-frequency resource (1) in the group 2 (i.e., the fourth time-frequency resource (1) in the N resources is indicated), so that the terminal device does not perform DL transmission on the fourth time-frequency resource (1), and the terminal device may send uplink information on the fourth time-frequency resource (1). The terminal device further determines that the third time-frequency resource occupies 50% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission may be performed using 50% of the bandwidth of the UL subband. The available frequency domain range of DL transmission increases, which is beneficial to improving the spectrum efficiency of the network.

As shown in part (c) of fig. 10 and 11, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 10 or 11, and the terminal device determines, according to the first indication information, that the first time-frequency resource indicated by the network device is a second time-frequency resource in group 1 (i.e., a second time-frequency resource in N resources is indicated), so that the terminal device does not perform DL transmission on the second time-frequency resource, i.e., all of the second time-frequency resources are not used for DL transmission at this time, and the terminal device may use all of the second time-frequency resources for UL transmission. The third time-frequency resource now occupies 0% of the bandwidth of the UL subband.

It may be understood that when the rate matching indication field is 11, the terminal device determines that the first time-frequency resource indicated by the network device is a second time-frequency resource in the group 1 (i.e. the second time-frequency resource in the N resources is indicated) and the first time-frequency resource is a fourth time-frequency resource (1) in the group 2 (i.e. the fourth time-frequency resource (1) in the N resources is indicated) according to the first indication information, where the reserved resources are the first time-frequency resource and the second time-frequency resource in the group 1 after the sum is obtained, so that the terminal device does not perform DL transmission on the second time-frequency resource, i.e. all the second time-frequency resources are not used for DL transmission at this time, and the terminal device may use all the second time-frequency resources to perform UL transmission. The third time-frequency resource now occupies 0% of the bandwidth of the UL subband. In the application, when the first indication information indicates a plurality of resources of the N resource intelligent bars, the terminal device does not perform DL transmission on the resources corresponding to the union of the plurality of resources, which is not described in detail later.

In summary, for the embodiments shown in fig. 10 and 11, the network device may use 0%, 50% or 100% of the second time-frequency resources for DL transmission.

Fig. 12 is a schematic diagram of another example of indicating the first time-frequency resource by rate matching according to the embodiment of the present application. Fig. 13 is a schematic diagram of another example of downlink transmission through the third time-frequency resource.

As shown in fig. 12 and fig. 13, in the embodiment of the present application, the terminal device is preconfigured with 3 resources (i.e., N has a value of 3), including one second time-frequency resource and two fourth time-frequency resources, where the ratio of the two fourth time-frequency resources to the second time-frequency resource is different. The bandwidth of the fourth time-frequency resource (1) is 30% of the bandwidth of the second time-frequency resource, the bandwidth of the fourth time-frequency resource (2) is 60% of the bandwidth of the second time-frequency resource (30% and 60% are examples, and specific values can be redefined according to actual requirements). The second time-frequency resource is one UL subband, i.e. the bandwidth of the second time-frequency resource is 100% of the bandwidth of the UL subband, the bandwidth of the fourth time-frequency resource (1) is 30% of the bandwidth of the UL subband, and the bandwidth of the fourth time-frequency resource (2) is 60% of the bandwidth of the UL subband.

The terminal device is further configured with two rate matching pattern groups (i.e. group 1 and group 2), the second time-frequency resource and the fourth time-frequency resource (1), the fourth time-frequency resource (2) being rate matching pattern resources, the fourth time-frequency resource (1) being included in group 1, the fourth time-frequency resource (2) being included in group 2, the second time-frequency resource not being included in any group. The first time-frequency resource may be indicated by a rate matching indication field in the DCI, and the first time-frequency resource may be any one of the 3 resources described above.

As shown in part (a) of fig. 13, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 10, and the terminal device determines, according to the first indication information, that the first time-frequency resource indicated by the network device is a fourth time-frequency resource (1) in the group 1 (i.e., the fourth time-frequency resource (1) in the N resources is indicated), so that the terminal device does not perform DL transmission on the fourth time-frequency resource (1), and the terminal device may perform UL transmission on the fourth time-frequency resource (1). The terminal device further determines that the third time-frequency resource occupies 70% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission may be performed using 70% of the bandwidth of the UL subband.

As shown in part (b) of fig. 13, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 01 or 11, and the terminal device determines, according to the first indication information, that the first time-frequency resource indicated by the network device is a fourth time-frequency resource (2) in the group 2 (i.e., the fourth time-frequency resource (2) in the N resources is indicated), so that the terminal device does not perform DL transmission on the fourth time-frequency resource (2), and the terminal device may perform UL transmission on the fourth time-frequency resource (2). The terminal device further determines that the third time-frequency resource occupies 40% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission may be performed using 40% of the bandwidth of the UL subband.

As shown in part (c) of fig. 13, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 00 or the field may be 0 bits, and the terminal device determines, according to the first indication information, that a first time-frequency resource indicated by the network device is a second time-frequency resource outside the group (i.e., a second time-frequency resource of the N resources is indicated), so that the terminal device does not perform DL transmission on the second time-frequency resource, and the terminal device may perform UL transmission on the second time-frequency resource. The terminal device further determines that the third time-frequency resource occupies 0% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission is performed using the 0% bandwidth of the UL subband.

It should be noted that, in the embodiment of the present application, in order to indicate the second time-frequency resource by the rate matching indication field (i.e., indicate that the first time-frequency resource is the second time-frequency resource), the embodiment of the present application may change (update) the current criterion. The current criterion of ' the rate matching pattern resources which are not configured in the group and the default of the terminal equipment are reserved to a certain degree ', is modified into ' the rate matching pattern resources which are not configured in the group except the resources on the UL sub-band, the terminal equipment is reserved to a certain degree by default, namely, when the first indication information indicates one or more resources in the fourth time-frequency resources, the second time-frequency resources are not reserved, and when the first indication information indicates any one of the fourth time-frequency resources is not reserved (namely, the first indication information is 00 or 0 bit), the second time-frequency resources are reserved).

In summary, for the embodiments shown in fig. 12 and fig. 13, the network device may use 0%, 40% or 70% of the second time-frequency resources for downlink transmission.

Fig. 14 is a schematic diagram of still another example of indicating the first time-frequency resource by rate matching according to the embodiment of the present application. Fig. 15 is a schematic diagram illustrating another example of downlink transmission by the third time-frequency resource. In the embodiment of the present application, the terminal device is preconfigured with N rate matching pattern groups, and N resources are respectively located in the N rate matching pattern groups. I.e., the aforementioned N resources are contained in N rate matching pattern groups in a one-to-one correspondence.

As shown in fig. 14 and 15, in the embodiment of the present application, the terminal device is preconfigured with 4 resources (i.e., N has a value of 4), including 1 second time-frequency resource and 3 fourth time-frequency resources, where the proportion of the 3 fourth time-frequency resources occupied by the second time-frequency resources is different. The bandwidth of the fourth time-frequency resource (1) is 25% of the bandwidth of the second time-frequency resource, the bandwidth of the fourth time-frequency resource (2) is 50% of the bandwidth of the second time-frequency resource, and the fourth time-frequency resource (3) is 75% of the bandwidth of the second time-frequency resource. The time domain ranges of the 4 resources are the same, the second time-frequency resource is one UL subband, namely, the bandwidth of the second time-frequency resource accounts for 100% of the bandwidth of the UL subband, the bandwidth of the fourth time-frequency resource (1) accounts for 25% of the bandwidth of the UL subband, the bandwidth of the fourth time-frequency resource (2) accounts for 50% of the bandwidth of the UL subband, and the bandwidth of the fourth time-frequency resource (3) accounts for 75% of the bandwidth of the UL subband.

The terminal device is further configured with 4 rate matching pattern groups (i.e., group 1, group 2, group 3, and group 4), the second time-frequency resource and the fourth time-frequency resource (1), the fourth time-frequency resource (2), and the fourth time-frequency resource (3) are all rate matching pattern resources, the fourth time-frequency resource (1) is included in group 1, the fourth time-frequency resource (2) is included in group 2, the fourth time-frequency resource (3) is included in group 3, and the second time-frequency resource is included in group 4. The first time-frequency resource may be indicated by a rate matching indication field in the DCI, and the first time-frequency resource may be any one of the 4 resources described above. The rate matching indication field may have N bits, where each bit is 0 or 1 to indicate one of the resources, e.g. the rate matching indication field includes 4 bits, corresponding to the 4 resources.

As shown in part (a) of fig. 15, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 1000, and the terminal device determines, according to the first indication information, that the first time-frequency resource indicated by the network device is a fourth time-frequency resource (1) in the group 1 (i.e., the fourth time-frequency resource (1) in the N resources is indicated), so that the terminal device does not perform DL transmission on the fourth time-frequency resource (1), and the terminal device may perform UL transmission on the fourth time-frequency resource (1). The terminal device further determines that the third time-frequency resource occupies 75% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission may be performed using 75% of the bandwidth of the UL subband.

As shown in part (b) of fig. 15, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 0100 or 1100, and the terminal device determines that the first time-frequency resource indicated by the network device is a fourth time-frequency resource (2) in the group 2 according to the first indication information (i.e., the fourth time-frequency resource (2) in the N resources is indicated), so that the terminal device does not perform DL transmission on the fourth time-frequency resource (2), and the terminal device may perform UL transmission on the fourth time-frequency resource (2). The terminal device further determines that the third time-frequency resource occupies 50% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission may be performed using 50% of the bandwidth of the UL subband.

As shown in part (c) of fig. 15, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 0010, 0110, 1010, or 1110, and the terminal device determines, according to the first indication information, that the first time-frequency resource indicated by the network device is a fourth time-frequency resource (3) in the group 3 (i.e., the fourth time-frequency resource (3) in the N resources is indicated), so that the terminal device does not perform DL transmission on the fourth time-frequency resource (3), and the terminal device may perform UL transmission on the fourth time-frequency resource (3). The terminal device further determines that the third time-frequency resource occupies 25% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission may be performed using 25% of the bandwidth of the UL subband.

As shown in part (d) of fig. 15, the network device sends first indication information to the terminal device, where the first indication information includes a rate matching indication field, where the rate matching indication field may be 0001 or 0011 or 0101 or 0111 or 1001 or 1011 or 1101 or 1111, and the terminal device determines, according to the first indication information, that the network device indicates a second time-frequency resource in group 4 (i.e. a second time-frequency resource in the N resources is indicated), so that the terminal device does not perform DL transmission on the second time-frequency resource, and the terminal device may perform UL transmission on the second time-frequency resource. The terminal device further determines that the third time-frequency resource occupies 0% of the bandwidth of the second time-frequency resource (i.e., UL subband), at which time the DL transmission is performed using the 0% bandwidth of the UL subband.

In summary, for the embodiments shown in fig. 14 and 15, the network device may use 0%, 25%, 50%, 75% of the second time-frequency resources for DL transmission.

Further, on the basis of the embodiments shown in fig. 14 and 15, the terminal device is further configured with a fourth time-frequency resource (4), and the size of the fourth time-frequency resource (4) is 0% of the size of the second time-frequency resource (i.e., the fourth time-frequency resource (4) does not include any resource at this time, and is an empty set). That is, the terminal device is preconfigured with 5 resources at this time (i.e., N has a value of 5). The fourth time-frequency resource (4) may also be indicated by a rate-matching indication field. For example, when the content of the rate matching indication field is 0000 or the field is 0 bit, the terminal device determines that the first time-frequency resource indicated by the network device is the fourth time-frequency resource (4) according to the first indication information, and at this time, since the fourth time-frequency resource (4) (accounting for 0% bandwidth of the UL sub-band) is an empty set excluding any resource, the terminal device determines that the third time-frequency resource accounts for 100% bandwidth of the second time-frequency resource (i.e. UL sub-band), and at this time, the DL transmission can be performed using 100% bandwidth of the UL sub-band.

That is, at this time, the network device may use 0%, 25%, 50%, 75%, or 100% of the second time-frequency resources for DL transmission.

In summary, the terminal device is configured with N resources, where the N resources include a second time-frequency resource and N-1 fourth time-frequency resources, the N-1 fourth time-frequency resources are all subsets of the second time-frequency resources, and one of the fourth time-frequency resources is an empty set. At this time, the terminal device may be configured with N-1 rate matching pattern groups, and N-1 resources other than the fourth time-frequency resource that is the null set among the N resources may be included in the N-1 rate matching pattern groups in a one-to-one correspondence. The first time-frequency resource may be indicated by means of a rate matching indication field at this time, and the first time-frequency resource may be any one of the N resources. For example, the value of N may be 3,4,5, 6, etc.

The foregoing embodiments shown in fig. 10-15 introduce a scheme of indicating a first time-frequency resource by configuring at least one of N resources as a rate matching pattern resource, and then by means of a rate matching indication field in a DCI field. In other implementations, the configuration and indication of the N resources may be implemented in other manners, for example, by indicating through other fields, which is not limited in this application.

In one possible implementation, the first indication information includes an index value of the first time-frequency resource, and the network device may determine which of the N pre-configured resources the first time-frequency resource is by indexing the index value to a value in a predefined table.

Specifically, in the embodiment of the present application, the terminal device is preconfigured with 5 resources (i.e., N has a value of 5), including 1 second time-frequency resource and 4 fourth time-frequency resources, where the bandwidth ratio of the second time-frequency resource (UL subband) occupied by the 4 fourth time-frequency resources is different from each other. Wherein the bandwidth of the second time-frequency resource is 100% of the bandwidth of the UL sub-band, the bandwidth of the fourth time-frequency resource (1) is 10% of the bandwidth of the UL sub-band, the bandwidth of the fourth time-frequency resource (2) is 30% of the bandwidth of the UL sub-band, the bandwidth of the fourth time-frequency resource (3) is 70% of the bandwidth of the UL sub-band, and the bandwidth of the fourth time-frequency resource (4) is 90% of the bandwidth of the UL sub-band. In the configuration process, the RB number M0 specifically included in each fourth time-frequency resource is N0 x Portion and is rounded up or rounded down, where N0 is the RB number of the UL subband in one SBFD slot, and Portion is the occupied bandwidth proportion. The starting position of the frequency domain range of the 4 fourth time-frequency resources may be the same as the starting position of the UL subband, or the center frequency of the frequency domain range of the 4 fourth time-frequency resources may be the same as the center frequency of the UL subband.

A rate matching section (Rate matching portion) field may be further added to the DCI, where the field may have M bits (e.g., 2 bits) and is used to indicate an index value of the first time-frequency resource, and by using the index value, it can be determined which of the N resources the first time-frequency resource is. Table 1 is a table of correspondence between index values of the first time-frequency resources and the fourth time-frequency resources.

TABLE 1

Index value of first time-frequency resource	First time-frequency resource
		00(0)	Fourth time-frequency resource (1) (10% bandwidth)
01(1)	Fourth time-frequency resource (2) (30% bandwidth)
		10(2)	Fourth time-frequency resource (3) (70% bandwidth)
11(3)	Fourth time-frequency resource (4) (90% bandwidth)

When the index value of the first time-frequency resource is 00, the terminal device can determine that the first time-frequency resource is a fourth time-frequency resource (1) (which accounts for 10% of the bandwidth of the UL sub-band), and the terminal device further determines that the third time-frequency resource accounts for 90% of the bandwidth of the second time-frequency resource (i.e. the UL sub-band), and uses 90% of the bandwidth of the UL sub-band for DL transmission.

When the index value of the first time-frequency resource is 01, the terminal device can determine that the first time-frequency resource is a fourth time-frequency resource (2) (accounting for 30% of the bandwidth of the UL sub-band) according to the index value, and the terminal device further determines that the third time-frequency resource accounts for 70% of the bandwidth of the second time-frequency resource (i.e. the UL sub-band), and uses 70% of the bandwidth of the UL sub-band for DL transmission.

When the index value of the first time-frequency resource is 10, the terminal device can determine that the first time-frequency resource is a fourth time-frequency resource (3) (accounting for 70% of the bandwidth of the UL sub-band) according to the index value, and the terminal device further determines that the third time-frequency resource accounts for 30% of the bandwidth of the second time-frequency resource (i.e. the UL sub-band), and uses 30% of the bandwidth of the UL sub-band for DL transmission.

When the index value of the first time-frequency resource is 11, the terminal device can determine that the first time-frequency resource is a fourth time-frequency resource (4) (which occupies 90% of the bandwidth of the UL sub-band), and the terminal device further determines that the third time-frequency resource occupies 10% of the bandwidth of the second time-frequency resource (i.e. the UL sub-band), and uses 10% of the bandwidth of the UL sub-band for DL transmission.

In the example of the present application, a rate matching section field may be added, which may have M bits, 2 is possible ^M Reservation indication of species, therefore 2 may be preconfigured ^M A fourth time-frequency resource, e.g., m=2, so that the terminal device can be preconfigured with 2 ^M =4 fourth time-frequency resources.

In some cases, the different embodiments of the present application can be combined with each other, for example, on the basis of the present embodiment, the foregoing embodiments shown in fig. 10 and 11 may be combined. As shown in fig. 10 and 11, by means of the rate matching indication field, the network device may implement an indication of reserved bandwidth of 0%, 50% or 100% of UL sub-bands, while by adding the rate matching part field, the network device may implement an indication of reserved bandwidth of 10%, 30%, 70%, 90% of UL sub-bands (here reserved bandwidth is bandwidth that cannot be used for DL transmission). Therefore, according to the communication method provided by the embodiment of the application, the following steps can be realized 3+2 ^M An indication of reserved bandwidth.

In some cases, the different embodiments of the present application can be combined with each other, for example, on the basis of the present embodiment, the foregoing embodiments shown in fig. 12 and 13 may be combined. As shown in fig. 12 and 13, by means of the rate matching indication field, the network device may implement an indication of reserved bandwidth of 0%, 40% or 70% of UL sub-bands, while by adding the rate matching part field, the network device may implement an indication of reserved bandwidth of 10%, 30%, 70%, 90% of UL sub-bands (here reserved bandwidth is bandwidth that cannot be used for DL transmission). Therefore, according to the communication method provided by the embodiment of the application, 3+2 can be realized altogether ^M An indication of reserved bandwidth.

Optionally, if the rate matching part field in the DCI is 0 bits, the reserved bandwidth of the UL subband is indicated according to the rate matching indication field (3 bandwidth indications may be implemented).

Alternatively, if the rate matching part field in the DCI is not 0 bits, the reserved bandwidth of the UL subband is indicated according to the rate matching part field (2 may be implemented ^M A seed bandwidth indication).

For example, when a second time-frequency resource (UL subband) of 70% bandwidth needs to be reserved, this is indicated by the value of the rate matching section field being 10.

For another example, when a second time-frequency resource (UL subband) of 30% bandwidth needs to be reserved, then this is indicated by the value of the rate matching section field being 01.

For another example, when a second time-frequency resource (UL subband) of 100% bandwidth needs to be reserved, then this is indicated by the value of the rate matching indication field being 10.

Alternatively, M bits may be added to the rate matching indication field, and the newly added M bits are understood according to the rate matching section field. No additional fields need to be added at this time.

Optionally, for DCI in 1-0 format, the indication of the first time-frequency resource may be implemented by adding the foregoing rate matching indication field and/or rate matching partial field.

In one possible implementation, the first indication information further includes information of the number of RBs included in the first time-frequency resource.

After receiving the first indication information, the terminal equipment determines a first time-frequency resource according to the number of RBs indicated by the first indication information and in combination with a preset rule of a system or a protocol. For example, the preset rule may be that a starting RB of the first time-frequency resource is an RB with a minimum RB index of the second time-frequency resource (UL subband), or an ending RB of the first time-frequency resource is an RB with a maximum RB index of the second time-frequency resource (UL subband). After the terminal device determines the first time-frequency resource according to the first indication information and the preset rule, a third time-frequency resource can be determined through the first time-frequency resource, and downlink data sent by the network device is received on the third time-frequency resource.

Alternatively, a field may be newly added in the DCI to indicate the number of RBs included in the first time-frequency resource.

In one possible implementation, the first indication information may indicate the first time-frequency resource by means of a bitmap (bitmap).

For PDSCH transmission of Type 0 (Type 0) indicated by 1-0 and 1-1 format DCI, the resource block group (resource block group, RBG) where the PDSCH is located is generally indicated by means of bitmap. On the basis, a bitmap can be used to indicate the first time-frequency resource in the second time-frequency resource for uplink transmission.

Fig. 16 is a schematic diagram of indicating a first time-frequency resource by a bitmap according to an embodiment of the present application. As shown in fig. 16, the second time-frequency resource may include a plurality of RBGs, including, for example, rbg#3, rbg#4, rbg#5, and rbg#6 in the drawing, where the 4 RBGs together form the second time-frequency resource in the present application. The network device indicates to the terminal device in a bitmap, for example, the bitmap may be "1110", where a bit value of 1 indicates that the RBG corresponding to the bit is used for DL transmission, and a bit value of 0 indicates that the RBG corresponding to the bit is not used for DL transmission. I.e., indicates that the third time-frequency resource includes rbg#3, rbg#4, rbg#5 therein, when the first time-frequency resource consisting of the 3 RBGs can be used for DL transmission, and rbg#6 having a bit value of 0 cannot be used for DL transmission.

Further, when the network device indicates PDSCH transmission by means of a bitmap, the network device may indicate uplink resources and downlink resources at the same time. For example, fig. 16 shows 1 SBFD slot including rbg#0 to rbg#9, for which indication the network device indicates that the bitmap may be "1111110110" indicating RBGs of rbg#0 to rbg#2, rbg#3 to rbg#5, rbg#7, rbg#8 are scheduled for DL transmission, wherein RBGs of rbg#3 to rbg#5 are originally configured as RBGs of UL, which are now used for DL transmission.

For the current criterion (called old criterion), when PDSCH transmission of Type 0 (Type 0) is being performed, the above RBGs configured as UL (i.e., RBGs #3 to RBG # 6) will not be used to transmit PDSCH, and the terminal device cannot receive downlink information on this part of the resources.

The embodiment of the application changes the criterion (called a new criterion), when the corresponding bit value of the RBG configured as UL in the bitmap is "1", the RBG will be able to be used to transmit PDSCH, and the terminal device will be able to receive downlink information on this part of the resources.

Alternatively, it may be determined whether the RBG configured as UL is understood according to an old criterion or a new criterion by indication information transmitted from the network device, i.e., whether the terminal device can receive downlink information from the resource. The indication may be a display indication or an implicit indication, or may be a direct indication or an indirect indication, which is not limited in this application. For example, the indication information may be 1 bit carried in DCI. For another example, if the DCI in 1-1 format includes the foregoing rate-matching indication field and/or rate-matching portion field to indicate the first time-frequency resource, then the implicit indication uses a new criterion to understand the RBG configured as UL. Otherwise, the RBG configured as UL is understood using the old criteria.

Alternatively, the network device may instruct the terminal device to understand the above RBG configured as UL according to the old criterion or the new criterion through RRC signaling.

Alternatively, the system or protocol may default to the new criteria to understand the UL configured RBG, i.e., the terminal device is able to receive downlink information from the resources.

The foregoing embodiments shown in fig. 7-16 provide a communication method according to which a portion of the resources (i.e., the first time-frequency resources) in the resources (i.e., the second time-frequency resources) configured for uplink transmission can be used to transmit downlink information. The resource type of the first time-frequency resource here may be, for example, uplink or flexible. However, this may conflict with current standard protocols. According to the current standard protocol, downlink transmission using resources whose transmission direction is preconfigured as uplink is not supported. Table 2 shows collision handling criteria for the current protocol standard in relation to downstream transmissions.

TABLE 2

Wherein, dynamic-D is DL signal received by the terminal equipment indicated by DCI. For example, dynamic-D includes PDSCH transmission indicated by DCI and channel state information reference signal (CSI-RS) transmission. The PDSCH transmission indicated by the DCI includes the DCI indicating that the terminal device receives the PDSCH in a plurality of slots or receives the PDSCH in 1 slot. Semi-U is a time-frequency resource configured by high-layer signaling of the system (such as TDD-UL-DL-ConfigCommon or TDD-UL-DL-ConfigDedimated) with a symbol format of uplink/transmission direction of uplink. The SFI-U is a time-frequency resource configured by a slot format indication (slot format indicator, SFI) field information indication in DCI2-0 with a symbol format of uplink/transmission direction of uplink. valid RO is a valid random access occasion (random access channel occasion, RACH occalasion, RO) resource.

Wherein, definition for valid RO is as follows:

for FDD systems, all ROs are valid;

for a TDD system, if the terminal device is not configured with TDD-UL-DL-configurationcommand, then at the current physical randomThe slot (slot) in which the access channel (physical random access channel, PRACH) is located, there is no synchronization broadcast block (synchronization signal/PBCH, SSB) following the RO, and the closest SSB to the front is separated by at least N _gap The RO is valid;

-for TDD, if the terminal device is configured with TDD-UL-DL-configuration command, if: the RO is configured in the UL symbol or in the time slot in which the current PRACH is located, there is no SSB following the RO, and at least N is spaced from the nearest SSB preceding _gap A number of symbols, and at least N spaced from the last preceding DL symbol _gap The RO in the PRACH slot is considered valid.

According to the current collision handling criteria, for example 1 and example 2 in Table 2, dynamic-D is not supported for transmission on resources configured as Semi-U and SFI-U (signals will be dropped). For example 3 in Table 2, dynamic-D is not supported for efficient RO resources and its predecessor N _gap The transmission is made on symbols (whether Dynamic-D has an intersection with the UL subband frequency domain or not). FIG. 17 is an effective RO and its top N _gap Schematic of the symbols. As shown in fig. 17, the RO resources available in slot #2, slot #3, slot #4 and the previous N thereof at this time _gap DL signals cannot be received on each symbol. In addition, since the terminal device is a terminal in the half duplex mode, the resources on the DL subband corresponding to the above resources cannot be used.

In view of the above, embodiments of the present application may modify rules, for example, new standards may allow Dynamic-D to transmit on resources configured as Semi-U and SFI-U. For example, the DCI-indicated PDSCH allows DL transmissions when the UL sub-band slot format is configured as semi-U/SFI-U.

As shown in fig. 17, for an effective RO resource not used by a terminal equipment (UE) to transmit PRACH and its previous N _gap A symbol, can be used to transmit DL signals. For example, for the valid RO resources in slot #2, slot #3 and their top N _gap The number of symbols is allowed to be used to transmit DL signals.

Optionally for RO resources and their previous N valid in SBFD slots _gap A number of symbols according to whichA specific usage scenario determines whether it is allowed to be used to transmit DL signals.

For example, for initial access, RRC reestablishment, etc., the RO resources available in SBFD time slots and their top N _gap The individual symbols are not allowed to be used to transmit DL signals. For initial access, for scenarios other than RRC reestablishment, the RO resources available in SBFD time slots and their previous N _gap The number of symbols is allowed to be used to transmit DL signals. At this time, the terminal device may transmit the PRACH only on the UL-only slot (i.e., instant # 5).

As one possible implementation, RO resources may be configured only within UL-only slots.

In an alternative manner, the resource configuration of the SBFD system may further include flexible resources and downlink resources, for example, the SBFD system includes at least one UL sub-band, and a portion of the resources on the UL sub-band may be configured as flexible (flexible), that is, the foregoing second time-frequency resources may also be configured as flexible resources, and according to an instruction of the network device, the terminal device may reserve the resources indicated therein (i.e., the first time-frequency resources), and not use the portion of the resources to perform DL transmission, and use resources other than the first time-frequency resources (i.e., the third time-frequency resources) in the second time-frequency resources to perform DL transmission.

In the related art, the bandwidth to be reserved may be indicated by a scheme similar to that in the foregoing fig. 10 and 11, that is, by a rate matching indication field. However, according to the technology, the network device can select only a few bandwidths, the choice is small, the flexibility of reserved bandwidth is limited, the flexibility of indication is poor, and the problems of resource waste, low resource utilization rate and the like caused by mismatching of the resources actually used for DL transmission (namely, the third time-frequency resources) with actual requirements are easy to occur, so that the spectrum use efficiency of the network is reduced.

Accordingly, the present application also provides another communication method, the method comprising:

the network device sends first indication information to the terminal device, wherein the first indication information indicates first time-frequency resources on a first time unit. Accordingly, the terminal device receives the first indication information from the network device.

The terminal equipment determines first time-frequency resources according to first indication information, wherein the first time-frequency resources are resources which cannot be used for downlink transmission by the terminal equipment, the first time-frequency resources are one of N resources on the first time unit, the N resources are different in size and comprise second time-frequency resources and N-1 fourth time-frequency resources, the second time-frequency resources are resources configured to be flexible by the terminal equipment, the N-1 fourth time-frequency resources are subsets of the second time-frequency resources, and N is an integer greater than or equal to 3.

And the network equipment transmits downlink information to the terminal equipment on a third time-frequency resource, wherein the third time-frequency resource is a resource which removes the first time-frequency resource from the second time-frequency resource. That is, the third time-frequency resource is a complement of the first time-frequency resource in the second time-frequency resource.

According to the communication method provided by the embodiment of the application, the network equipment has more choices for reasonably indicating the specifically reserved bandwidth of the terminal equipment, so that a third time-frequency resource with more proportions can be used for DL transmission. The resource reservation is more reasonable and accurate, the indication flexibility of the resource reservation can be improved, the matching degree of the size of the third time-frequency resource and the actual DL transmission requirement is higher, the resource saving is facilitated, the utilization rate of the resource is improved, and therefore the spectrum utilization efficiency of the whole cell can be improved. The communication method provided by the embodiment of the application can reasonably and secondarily allocate flexible resources, so that when the symbol types on the UL sub-band are flexible, the resource proportion of the UL sub-band for DL transmission is more flexible, and the method is more fit with actual transmission requirements.

Alternatively, the value of N may be 3, where the N resources are all non-empty resource sets. The value of N may be any larger value such as 4,5, or 6.

In one possible implementation, the second time-frequency resource is an uplink subband.

In one possible implementation, one fourth time-frequency resource of the N-1 fourth time-frequency resources is an empty set. At this time, the terminal device may be configured with N-1 rate matching pattern groups, and N-1 resources other than the fourth time-frequency resource that is the null set among the N resources may be included in the N-1 rate matching pattern groups in a one-to-one correspondence. The first resource may be indicated at this time by means of a rate matching indication field, and the first resource may be any one of the N resources. For example, the value of N may be 3,4,5, 6, etc.

In one possible implementation, the first resource may include a symbol in which a valid random access opportunity (random access channel occasion, RACH timing, RO) is located and/or N preceding the symbol _gap And a symbol.

In one possible implementation manner, the first indication information may include Identification (ID), number, index (index) of the first time-frequency resource, time domain information (such as a time domain start position, a time domain end position, a time domain center position, a time duration) of the first time-frequency resource, frequency domain information (such as a frequency domain start position, a frequency domain end position, a frequency domain center position, a bandwidth, a number of Resource Blocks (RBs)) of the first time-frequency resource, and any information capable of helping the terminal device determine the first time-frequency resource.

It should be understood that, in this embodiment, how to indicate the first time-frequency resource by the first indication information may refer to the relevant expression in the foregoing embodiment, for example, the content related to fig. 12-16 may be directly borrowed, which is not described herein.

The communication method of the embodiment of the present application is described in detail above with reference to fig. 1 to 17, and the apparatus of the embodiment of the present application is described in detail below with reference to fig. 18 to 21. It should be appreciated that the apparatus shown in fig. 18-21 is capable of performing one or more of the steps of the method flow shown in fig. 7. To avoid repetition, details are not repeated here.

Fig. 18 is a schematic block diagram of a terminal device 1800 provided by an embodiment of the present application. As shown in fig. 18, the terminal device 1800 includes: a receiving unit 1810 and a determining unit 1820.

A receiving unit 1810 configured to receive first indication information from the network device 1800, where the first indication information indicates a first time-frequency resource on a first time unit;

a determining unit 1820, configured to determine, according to the first indication information, the first time-frequency resource, where the first time-frequency resource is a resource that cannot be used for downlink transmission by the terminal device 1800, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource configured for uplink transmission by the terminal device;

the receiving unit 1810 is further configured to receive downlink information from the network device on a third time-frequency resource on the first time unit, where the third time-frequency resource is a resource excluding the first time-frequency resource from the second time-frequency resource.

In a possible implementation manner, the receiving unit 1810 is further configured to receive configuration information of the N resources from the network device.

In a possible implementation manner, the terminal device 1800 may be the terminal device 1900 in the following figure, where the function of the receiving unit 1810 may be implemented by the transceiver 1901 (i.e. the control circuit and the antenna together) of the terminal device 1900, and the function of the determining unit 1820 may be implemented by the processor 1902 of the terminal device 1900. The structure of the terminal device 1900 according to the embodiment of the present application is described below with reference to fig. 19.

Fig. 19 is a schematic structural diagram of a terminal device 1900 according to an embodiment of the present application. The terminal device 1900 may be adapted to the system shown in fig. 1, and perform the functions of the terminal device (UE) in the above-described method embodiment. For convenience of explanation, fig. 19 shows only major components of the terminal device. As shown in fig. 19, the terminal device 1900 includes a processor 1902, a memory, a control circuit, an antenna, and an input-output apparatus. The processor 1902 is mainly configured to process communication protocols and communication data, and to control the entire terminal device, execute software programs, and process data of the software programs, for example, to support the terminal device to perform the actions described in the above method embodiments. The memory is mainly used for storing software programs and data. The control circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The control circuit together with the antenna, which may also be called transceiver 1901, is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used for receiving data input by a user and outputting data to the user.

When the terminal device is turned on, the processor 1902 may read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be transmitted wirelessly, the processor 1902 performs baseband processing on the data to be transmitted, and then outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art will appreciate that fig. 19 shows only one memory and one processor for ease of illustration. In an actual terminal device, there may be multiple processors and multiple memories. The memory may also be referred to as a storage medium or a storage device, which is not limited in this embodiment.

As an alternative implementation manner, the processor may include a baseband processor, which is mainly used for processing the communication protocol and the communication data, and a central processor, which is mainly used for controlling the whole terminal device, executing a software program, and processing the data of the software program. The processor in fig. 19 may integrate the functions of the baseband processor and the central processor, and those skilled in the art will appreciate that the baseband processor and the central processor may also be separate processors, interconnected by bus technology, etc. Those skilled in the art will appreciate that the terminal device may include multiple baseband processors to accommodate different network formats, and that the terminal device may include multiple central processors to enhance its processing capabilities, and that the various components of the terminal device may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data may be built in the processor, or may be stored in the storage unit in the form of a software program, which is executed by the processor to realize the baseband processing function.

Fig. 20 is a schematic block diagram of a network device 2000 provided in an embodiment of the present application. As shown in fig. 20, the network device 2000 includes: a transmitting unit 2010.

A sending unit 2010, configured to send first indication information to a terminal device, where the first indication information indicates a first time-frequency resource on a first time unit, where the first time-frequency resource is a resource that cannot be used for downlink transmission by the terminal device, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource configured by the terminal device and used for uplink transmission;

the sending unit 2010 is further configured to send downlink information to the terminal device on a third time-frequency resource in the first time unit, where the third time-frequency resource is a resource excluding the first time-frequency resource from the second time-frequency resource.

In a possible implementation manner, the sending unit 2010 is further configured to send configuration information of the N resources to the terminal device.

In one possible implementation, the first indication information includes a rate matching indication field.

Specifically, the network device 2000 may correspond to a network device in the communication method 700 according to an embodiment of the present application, or a chip configured in the network device. The network device 2000 may include means for performing the method performed by the network device of the communication method 700 of fig. 7. Moreover, in order to implement the corresponding flow of the communication method 700 in fig. 7, each unit in the network device 2000 and the other operations and/or functions described above, a specific process of each unit performing the corresponding steps described above is described in detail in the method 700, and for brevity, will not be described herein again.

In one possible implementation, the network device 2000 may be a base station, gNB or TRP, DU, CU, CU-CP (control plane) or CU-UP (user plane), etc., and the sending unit 2010 may be a transceiver, or a transceiving circuit. Alternatively, the transceiver may be an input/output circuit or interface.

The network device 2000 may also be a chip. The transmitting unit 2010 may be an input/output circuit or an interface of a chip.

In a possible implementation, the network device 2000 may be an access network device, such as a base station 60 hereinafter, where the function of the sending unit 2010 may be implemented by an RRU 601 of the base station 60. The structure of the network device according to the embodiment of the present application is described below with reference to fig. 21.

Fig. 21 is a schematic structural diagram of a network device provided in the embodiment of the present application, for example, may be a schematic structural diagram of a base station. As shown in fig. 21, the base station may be applied to the system shown in fig. 1, and perform the functions of the network device in the above method embodiment. The base station 60 may include one or more radio frequency units, such as a remote radio frequency unit (remote radio unit, RRU) 601 and one or more baseband units (BBU) (also referred to as digital units, DUs) 602. The RRU 601 may be referred to as a transceiver unit, transceiver circuitry, or transceiver, etc., which may include at least one antenna 6011 and a radio frequency unit 6012. The RRU 601 is mainly configured to receive and transmit radio frequency signals and convert radio frequency signals to baseband signals, for example, to send signaling messages to a terminal device as described in the foregoing embodiments. The BBU 602 is mainly configured to perform baseband processing, control a base station, and the like. The RRU 601 and BBU 602 may be physically located together or may be physically located separately, i.e. a distributed base station.

The BBU 602 is a control center of a base station, and may also be referred to as a processing unit, and is mainly configured to perform baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on. For example, the BBU (processing unit) 602 may be configured to control a base station to perform the operation procedures described in the above method embodiments with respect to the network device.

In an example, the BBU 602 may be configured by one or more single boards, where the multiple single boards may support a single access indicated radio access network (such as an LTE network) together, or may support radio access networks of different access systems (such as an LTE network, a 5G network, or other networks) respectively. The BBU 602 also includes a memory 6021 and a processor 6022, the memory 6021 for storing necessary instructions and data. For example, the memory 6021 stores the correspondence between the codebook index and the precoding matrix in the above embodiment. The processor 6022 is configured to control the base station to perform necessary actions, for example, to control the base station to perform the operation procedure about the network device in the above-described method embodiment. The memory 6021 and processor 6022 may serve one or more boards. That is, the memory and the processor may be separately provided on each board. It is also possible that multiple boards share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It should be appreciated that the processor in embodiments of the present application may be a central processing unit (Central Processing Unit, CPU), which may also be other general purpose processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), off-the-shelf programmable gate arrays (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should also be appreciated that the memory in embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, RAM) are available, such as Static RAM (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

According to the method provided by the embodiment of the application, the application further provides a computer program product, which comprises: computer program code to, when run on a computer, cause the computer to perform the method of the embodiment shown in fig. 7.

According to the method provided in the embodiment of the present application, there is further provided a computer readable medium storing a program code, which when run on a computer, causes the computer to perform the method of the embodiment shown in fig. 7.

According to the method provided by the embodiment of the application, the application further provides a system which comprises the one or more terminal devices and the one or more network devices.

The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.

For ease of understanding, terms involved in the course of the introduction of the present application are described below.

In the embodiment of the application, the "indication" may include a direct indication and an indirect indication, and may also include an explicit indication and an implicit indication. The information indicated by a certain information (such as the "indication information") is called to-be-indicated information, and in a specific implementation process, there are various ways of indicating to-be-indicated information, for example, but not limited to, the to-be-indicated information may be directly indicated, such as the to-be-indicated information itself or an index of the to-be-indicated information, etc. The information to be indicated can also be indicated indirectly by indicating other information, wherein the other information and the information to be indicated have an association relation. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of the specific information may also be achieved by means of a pre-agreed (e.g., protocol-specified) arrangement sequence of the respective information, thereby reducing the indication overhead to some extent.

In the embodiments of the present application, the "first", "second", "third" and various numerical numbers are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, to distinguish between different resources, etc.

The "communication protocol" referred to in the embodiments of the present application may refer to a standard protocol in the communication field, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in a future communication system, which is not limited in this application.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

In various embodiments of the present application, the sequence number of each process does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the terminal equipment receives first indication information from the network equipment, wherein the first indication information indicates first time-frequency resources on a first time unit;

the terminal equipment determines the first time-frequency resource according to the first indication information, wherein the first time-frequency resource is a resource which cannot be used for downlink transmission by the terminal equipment, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource which is configured for uplink transmission by the terminal equipment;

and the terminal equipment receives downlink information from the network equipment on third time-frequency resources on the first time unit, wherein the third time-frequency resources are resources in the second time-frequency resources except the first time-frequency resources.

2. The method of claim 1, wherein the first time-frequency resource is one of N resources on the first time unit, the N resources being of different sizes and comprising the second time-frequency resource and N-1 fourth time-frequency resources, each of the N-1 fourth time-frequency resources being a subset of the second time-frequency resources, N being an integer greater than or equal to 2.

3. The method of claim 2, wherein the frequency domain range of the second time-frequency resource is one uplink subband.

4. A method according to claim 2 or 3, characterized in that at least one of the N resources is configured by a rate matching pattern.

5. The method of claim 4, wherein the terminal device is preconfigured with two sets of rate matching patterns, and wherein two of the N resources are located within the two sets of rate matching patterns, respectively.

6. The method of claim 4, wherein the terminal device is preconfigured with N sets of rate matching patterns, the N resources being contained within the N sets of rate matching patterns, respectively.

7. A method of communication, comprising:

The method comprises the steps that network equipment sends first indication information to terminal equipment, wherein the first indication information indicates first time-frequency resources on a first time unit, the first time-frequency resources are resources which cannot be used for downlink transmission by the terminal equipment, the first time-frequency resources belong to second time-frequency resources on the first time unit, and the second time-frequency resources are resources which are configured by the terminal equipment and are used for uplink transmission;

and the network equipment sends downlink information to the terminal equipment on third time-frequency resources on the first time unit, wherein the third time-frequency resources are resources in which the first time-frequency resources are removed from the second time-frequency resources.

8. The method of claim 7, wherein the first time-frequency resource is one of N resources on the first time unit, the N resources being of different sizes and comprising the second time-frequency resource and N-1 fourth time-frequency resources, the N-1 fourth time-frequency resources each being a subset of the second time-frequency resources, N being an integer greater than or equal to 2.

9. The method of claim 8, wherein the frequency domain range of the second time-frequency resource is one uplink subband.

10. The method according to claim 8 or 9, wherein at least one of the N resources is configured by a rate matching pattern.

11. The method of claim 10, wherein the terminal device is preconfigured with two sets of rate matching patterns, two of the N resources being located within the two sets of rate matching patterns, respectively.

12. The method of claim 10, wherein the terminal device is preconfigured with N sets of rate matching patterns, the N resources being located within the N sets of rate matching patterns, respectively.

13. A terminal device, comprising:

a receiving unit, configured to receive first indication information from a network device, where the first indication information indicates a first time-frequency resource on a first time unit;

a determining unit, configured to determine, according to the first indication information, the first time-frequency resource, where the first time-frequency resource is a resource that cannot be used for downlink transmission by the terminal device, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource configured for uplink transmission by the terminal device;

The receiving unit is further configured to receive downlink information from the network device on a third time-frequency resource on the first time unit, where the third time-frequency resource is a resource excluding the first time-frequency resource from the second time-frequency resource.

14. The terminal device of claim 13, wherein the first time-frequency resource is one of N resources on the first time unit, the N resources being of different sizes and comprising the second time-frequency resource and N-1 fourth time-frequency resources, the N-1 fourth time-frequency resources each being a subset of the second time-frequency resources, N being an integer greater than or equal to 2.

15. The terminal device of claim 14, wherein the frequency domain range of the second time-frequency resource is one uplink subband.

16. The terminal device according to claim 14 or 15, wherein at least one of the N resources is configured by a rate matching pattern.

17. The terminal device of claim 16, wherein the terminal device is preconfigured with two rate matching pattern groups, and wherein two of the N resources are located within the two rate matching pattern groups, respectively.

18. The terminal device of claim 16, wherein the terminal device is preconfigured with N sets of rate matching patterns, the N resources being respectively contained within the N sets of rate matching patterns.

19. A network device, comprising:

a sending unit, configured to send first indication information to a terminal device, where the first indication information indicates a first time-frequency resource on a first time unit, where the first time-frequency resource is a resource that cannot be used for downlink transmission by the terminal device, the first time-frequency resource belongs to a second time-frequency resource on the first time unit, and the second time-frequency resource is a resource configured by the terminal device and used for uplink transmission;

the sending unit is further configured to send downlink information to the terminal device on a third time-frequency resource on the first time unit, where the third time-frequency resource is a resource in the second time-frequency resource excluding the first time-frequency resource.

20. The network device of claim 19, wherein the first time-frequency resource is one of N resources on the first time unit, the N resources being of different sizes and comprising the second time-frequency resource and N-1 fourth time-frequency resources, the N-1 fourth time-frequency resources each being a subset of the second time-frequency resources, N being an integer greater than or equal to 2.

21. The network device of claim 20, wherein the frequency domain range of the second time-frequency resource is one uplink subband.

22. The network device of claim 20 or 21, wherein at least one of the N resources is configured by a rate matching pattern.

23. The network device of claim 22, wherein the terminal device is preconfigured with two sets of rate matching patterns, two of the N resources being located within the two sets of rate matching patterns, respectively.

24. The network device of claim 22, wherein the terminal device is preconfigured with N sets of rate matching patterns, the N resources being contained within the N sets of rate matching patterns, respectively.

25. A terminal device comprising at least one processor for coupling with a memory, reading and executing instructions in the memory to implement the method of any of claims 1 to 6.

26. A network device comprising at least one processor for coupling with a memory, reading and executing instructions in the memory to implement the method of any of claims 7 to 12.

27. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when run on a computer, causes the computer to perform the method according to any of claims 1 to 12.

28. A computer program product, comprising: computer program code which, when run on a computer, causes the computer to perform the method of any of claims 1 to 12.

29. A chip system comprising a processor for calling and running a computer program from a memory, causing a communication device in which the chip system is installed to perform the method of any one of claims 1 to 12.

30. A communication system comprising a terminal device according to claim 25 and/or a network device according to claim 26.