CN107483166B - Method and device in wireless communication - Google Patents
Method and device in wireless communication Download PDFInfo
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- CN107483166B CN107483166B CN201610407067.6A CN201610407067A CN107483166B CN 107483166 B CN107483166 B CN 107483166B CN 201610407067 A CN201610407067 A CN 201610407067A CN 107483166 B CN107483166 B CN 107483166B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses the method and apparatus in a kind of wireless communication, UE receives first information set and the second information aggregate, is then receiving the first wireless signal on the first running time-frequency resource, or send the first wireless signal on the first running time-frequency resource.Wherein, first wireless signal include { the first reference signal, the first data-signal } at least the former.The first information set is used for determining First ray.First running time-frequency resource belongs to first band on frequency domain, and the quantity of the element in the First ray is related to the bandwidth of the first band.Generation and mapping mode of the present invention by the element in the design First ray, first reference signal under different sub-carrier interval is indicated and configured by the way of unified, it avoids and uses different subcarrier spacings because transmitting, and the frequent transmission of bring the first reference signal configuration information.The expense of configuration information is reduced, spectrum efficiency is improved.
Description
Technical Field
The present invention relates to transmission schemes for wireless signals in wireless communication systems, and more particularly, to methods and apparatus for wireless transmission of configurable subcarrier spacings.
Background
In the existing LTE (Long-Term Evolution) and LTE-a (Long Term Evolution Advanced, enhanced Long Term Evolution) systems, the Subcarrier Spacing (Subcarrier Spacing) of each downlink channel is consistent and equal to 15 kHz. In Release-14, for IoT (Internet of Things) communication, especially NB (Narrowband) -IoT devices, it is proposed to use 3.75kHz subcarrier spacing in uplink to reduce the complexity and cost of the terminal device.
A New Generation of Radio access technologies (NR) is currently being established by 3GPP (3rd Generation Partner Project). Among them, three scenes are defined in tr (technical report)38.913, which are:
eMBB (enhanced Mobile Broadband )
mMTC (massive Machine Type Communications)
URLLC (Ultra-Reliable and Low Latency Communications)
The three application scenarios and corresponding wireless transmission techniques may require the system to support multiple subcarrier spacings. On 3GPP RAN1#84bis and #85 conferences, various subcarrier spacings are discussed, e.g., 15kHz, 17.06kHz, etc.
Disclosure of Invention
In the conventional LTE and LTE-a systems, all manners of generating a DM-RS (Demodulation Reference Signal) sequence based on data channel transmission and mapping the DM-RS sequence to a RE (Resource Element) in one PRB (Physical Resource block) pair are designed based on a fixed subcarrier interval. The UE only needs to obtain AP (Antenna Port), Number of layers (Number of layer), SCI (Scrambling Identity) and other related information configured by the base station, so as to obtain the RE position occupied by the DM-RS in a PRB pair and generate a reference signal sequence of the DM-RS. When the UE and the base station support multiple subcarrier spacings, different DM-RS generation manners and mapping manners for different subcarrier spacings need to be defined.
A simple way is to configure different DM-RS generation ways and mapping ways for different subcarrier spacings. However, the above method has two significant problems. The first problem is that the mapping mode of DM-RS is predefined at present, and the base station only needs to dynamically indicate the number of configured APs and the number of layers, if the subcarrier spacing can be flexibly changed according to the application scenario and the requirement, the system implementation will be more complicated if multiple mapping modes and sequence generation modes of DM-RS are predefined. The second problem is that when there are multiple different subcarrier spacings in one system bandwidth, the overhead of system information due to the DM-RS configuration will be large, reducing the overall spectral efficiency.
The present invention provides a solution to the above problems. It should be noted that the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict. For example, embodiments and features in embodiments in the UE of the present application may be applied in a base station and vice versa.
The invention discloses a method in UE supporting configurable subcarrier spacing, which comprises the following steps:
-step a. receiving a first set of information;
-step b. receiving a second set of information;
-step c. receiving a first wireless signal on a first time-frequency resource or transmitting a first wireless signal on a first time-frequency resource.
Wherein the first wireless signal comprises at least the former of { first reference signal, first data signal }. The first set of information is used to determine a first sequence, the elements comprised by the RS sequence of the first reference signal being a subset of the elements comprised by the first sequence. The first time-frequency resource belongs to a first frequency band in a frequency domain, and the number of elements in the first sequence is related to a bandwidth of the first frequency band. The second set of information is used to determine a subcarrier spacing to which the first wireless signal corresponds.
In the conventional LTE and LTE-a systems, the subcarrier spacing corresponding to the DM-RS of the downlink and uplink of the UE is 15kHz, and the positions of the time-frequency resources occupied by the DM-RS and the sequence used by the DM-RS are only related to configuration information such as AP (Antenna Port), PCI (Physical Cell Identity, PCID), SCI (Scrambling Identity), Number of layers (Number of Layer), and the like. Therefore, the system only needs to define a plurality of mapping modes corresponding to different APs and layer numbers for one subcarrier spacing, and then let the UE obtain the corresponding DM-RS configuration through the indication. In the NR system, there may be transmission modes with multiple subcarrier spacings in one system bandwidth, and if a set of mapping modes and configuration information of DM-RS is designed for each subcarrier spacing, there will be a large amount of candidate configuration information, which will cause more waste of configuration information and increase the complexity of UE and system design.
As an embodiment, the RS sequence of the first reference signal is independent of the subcarrier spacing corresponding to the first wireless signal.
In the above embodiment, the system does not need to adjust the configuration parameter of the RS sequence of the first reference signal according to the change of the subcarrier spacing, which reduces signaling overhead on one hand and reduces complexity of the UE on the other hand.
As an embodiment, the subcarrier spacing corresponding to the first wireless signal is applied to the first reference signal and the first data signal.
As one embodiment, the first reference signal is used to determine a parameter of a wireless channel experienced by the first wireless signal.
As an embodiment, the first set of information is the UE-specific higher layer signaling.
As an embodiment, the first information set is RRC (Radio Resource Control) signaling for the UE.
As an embodiment, the first set of information comprises at least one of { physical layer signaling, higher layer signaling, signature sequence }.
As an embodiment, the first information set includes at least one of { indication information of one or more APs to which the first reference signal corresponds, an identity of a sender of the first wireless signal, an identity of the UE, a specific parameter }.
As a sub-embodiment of this embodiment, the indication information of the AP includes AP configuration information and layer number information corresponding to the first wireless signal.
As a sub-embodiment of this embodiment, the identity of the sender of the first wireless signal is a PCI of a serving cell of the UE.
As a sub-embodiment of this embodiment, the identity of the UE is an RNTI (Radio Network Temporary Identifier).
As a sub-embodiment of this embodiment, the specific parameter is an integer configured by higher layer signaling.
As a sub-embodiment of this embodiment, the specific parameter is used only for the first reference signal.
As a sub-embodiment of this embodiment, the specific parameters are configured by UE-specific higher layer signaling.
As a sub-embodiment of this embodiment, the specific parameter comprises a SCI configured for the UE.
As a sub-embodiment of this embodiment, the specific parameter includes a type of CP (Cyclic Prefix) length employed by the first radio signal.
As an adjunct embodiment of the sub-embodiment, the length type of the CP includes E-CP (Extended CP) and N-CP (Normal CP).
As an embodiment, the second set of information is a physical layer signaling.
As an embodiment, the second set of information is a dynamic signaling.
As an embodiment, the second Information set is a DCI (Downlink Control Information).
As an embodiment, the second set of information is a DCI of a downlink grant (DL grant).
As an embodiment, the second set of information is DCI of an uplink grant (UL grant).
As an embodiment, the second set of information is the UE-specific physical layer signaling.
As an embodiment, the second set of information is the UE-specific higher layer signaling.
As an embodiment, the second set of information is RRC signaling for the UE.
As an embodiment, the second signaling set is physical layer signaling, and the second signaling set further includes scheduling information of the first wireless signal, where the scheduling information includes at least one of { MCS (Modulation and Coding Status), NDI, RV (Redundancy Version), HARQ (Hybrid automatic repeat reQuest) process number }.
As an embodiment, the transmission Channel corresponding to the first wireless signal is an UL-SCH (Uplink Shared Channel).
As an embodiment, the transmission Channel corresponding to the first wireless signal is a DL-SCH (Downlink Shared Channel).
As an embodiment, the subcarrier spacing corresponding to the first wireless signal is one of {3.75kHz, 15kHz, 17.07kHz, 17.5kHz, 30kHz, 60kHz, 75kHz, 120kHz, 240kHz, 480kHz }.
As an embodiment, the subcarrier spacing corresponding to the first wireless signal is a positive integer multiple of a reference subcarrier spacing. As one embodiment, the reference subcarrier spacing is 15 kHz.
For one embodiment, the second set of information explicitly indicates a subcarrier spacing to which the first wireless signal corresponds.
As an embodiment, the second set of information implicitly indicates a subcarrier spacing to which the first wireless signal corresponds.
As one embodiment, the first frequency band is indicated by broadcast signaling.
As a sub-embodiment of this embodiment, the indication that the first frequency band is indicated by broadcast signaling means that a center frequency point and a bandwidth of the first frequency band are indicated by the broadcast signaling.
As an embodiment, the first frequency band is indicated by SIB1(System Information Block 1).
As one embodiment, the first frequency band is not less than 20MHz (megahertz).
As an embodiment, the first frequency band corresponds to one carrier.
As an example, the first frequency band corresponds to one carrier of next generation wireless communication.
As an example, the first frequency band occupies contiguous 100 MHz.
As an example, the first frequency band occupies 20MHz of contiguous.
As an embodiment, the number of elements in the first sequence is linear with the bandwidth of the first frequency band.
As a sub-embodiment of this embodiment, the linear relationship means that the number of elements in the first sequence increases as the bandwidth of the first frequency band becomes larger; the number of elements in the first sequence decreases as the bandwidth of the first frequency band decreases.
As a sub-embodiment of this embodiment, the element # m in the first sequence is generated by the following formula:
wherein,represents element # m and occupies one RU (Resource Unit), subscript nsIndicates that the element # m is located in the (n) th time window of a first time windows-1) TU (Time Unit), c (2m) and c (2m +1) representing element # (2m) and element # (2m +1) in a given pseudo-random sequence. j is an imaginary unit, and M is an integer of not less than 0 and not more than (N M-1). Wherein N is a positive integer and represents the number of RUs in one time-frequency resource block for transmitting the first reference signal. M is a positive integer and represents the number of the time-frequency resource blocks occupied by the first frequency band in the frequency domain.
As an auxiliary embodiment of this sub-embodiment, the first reference signal generated by the first sequence is used for downlink transmission.
As an auxiliary embodiment of the sub-embodiment, the time-frequency resource blocks occupy P milliseconds continuously in the time domain, and the time-frequency resource blocks occupy F kilohertz continuously in the frequency domain.
As an additional embodiment of this sub-embodiment, said F is equal to 180.
As an additional embodiment of this sub-embodiment, said P is equal to one of {0.5, 1 }.
As an additional embodiment of this sub-embodiment, the duration of the first time window in the time domain is a positive integer number of milliseconds.
As an additional embodiment of this sub-embodiment, the duration of the first time window in the time domain is 10ms (milliseconds).
As an additional embodiment of this sub-embodiment, said P milliseconds is equal to a positive integer number of said TUs.
As an additional embodiment of this sub-embodiment, the P milliseconds are equal to the duration of 2 of the TUs.
As an adjunct embodiment of this sub-embodiment, the RUs occupy one subcarrier in the frequency domain and the RUs occupy the duration of one multicarrier symbol in the time domain.
As an example of this subsidiary embodiment, the multicarrier symbol is an OFDM (Orthogonal Frequency Division Multiplexing) symbol.
As an example of this subsidiary embodiment, the multicarrier symbol is an SC-FDMA (Single-Carrier Frequency Division Multiple Access) symbol.
As an example of this subsidiary embodiment, the multicarrier symbol is an FBMC (Filter Bank Multi Carrier) symbol.
As an example of this subsidiary embodiment, the multicarrier symbol is an OFDM symbol including a CP (Cyclic Prefix).
As an example of this subsidiary embodiment, the multicarrier symbol is a DFT-s-OFDM (Discrete Fourier Transform Spreading Orthogonal Frequency division multiplexing) symbol containing a CP.
As an additional embodiment of this sub-embodiment, the TU occupies a positive integer number of multicarrier symbol durations in the time domain.
As an additional embodiment of this sub-embodiment, the TU occupies t (ms) in the time domain. T is equal to one of {0.25,0.5,1 }.
As an auxiliary embodiment of the sub-embodiment, N is a positive integer greater than 1, and represents the number of RUs occupied by the first reference signal in one time-frequency resource block.
As an additional embodiment of this sub-embodiment, N is a positive integer greater than 1 and is fixed.
As an additional embodiment of this sub-embodiment, said N is equal to 12.
As an additional embodiment of this sub-embodiment, N is a positive integer greater than 1, and N is related to AP indication information included in the first information set.
As an additional embodiment of this sub-embodiment, the starting element c of the given pseudo-random sequenceinitProduced by the following equation:
wherein,is PCI of a cell serving the UE, nRNTIIs an RNTI assigned to the UE. n issIndicating that the corresponding generated sequence is located in the (n) th time windows-1) TUs.
As a sub-embodiment of this embodiment, the subcarrier spacing of the subcarriers occupied by the first wireless signal is 15kHz, and the number of subcarriers occupied by the first wireless signal isWhen in useLess than 36, the first sequence is associated with a first base sequence, the element # n of which is generated by the following equation:
wherein,representing element # n, and occupying an RU, j being an imaginary unit, n being not less than 0 and not more thanIs an integer of (1). The above-mentionedSee TS 36.211.
As an auxiliary embodiment of this sub-embodiment, the first reference signal generated by the first sequence is used for uplink transmission.
As an adjunct embodiment of this sub-embodiment, the RUs occupy one subcarrier in the frequency domain and the RUs occupy the duration of one multicarrier symbol in the time domain.
As an example of this subsidiary embodiment, the multicarrier symbol is one of { OFDM symbol, OFDM symbol containing CP, SC-FDMA symbol, FBMC symbol, DFT-s-OFDM symbol containing CP }.
As a sub-embodiment of this embodiment, the subcarrier spacing occupied by the first wireless signal is 15kHz, and the number of subcarriers occupied by the first wireless signal isWhen in useNot less than 36, the first sequence is associated with a first base sequence, and element # n in the first base sequence is generated by the following formula:
wherein,representing element # n, and occupying an RU, j being an imaginary unit, n being not less than 0 and not more thanIs an integer of (1). The above-mentionedFor cyclic shifts of the ZC (Zadoff-Chu) sequence, see section 5.5.1.1 of TS (technical specification) 36.211.
As an auxiliary embodiment of this sub-embodiment, the first reference signal generated by the first sequence is used for uplink transmission.
As an adjunct embodiment of this sub-embodiment, the RUs occupy one subcarrier in the frequency domain and the RUs occupy the duration of one multicarrier symbol in the time domain.
As an example of this subsidiary embodiment, the multicarrier symbol is one of { OFDM symbol, OFDM symbol containing CP, SC-FDMA symbol, FBMC symbol, DFT-s-OFDM symbol containing CP }.
As a sub-embodiment of this embodiment, the relationship of the first sequence element # n to the first base sequence element # n is expressed as the following formula:
where α represents the cyclic shift employed. See section 5.5.1 of TS 36.211.
As an auxiliary embodiment of this sub-embodiment, the first reference signal occupies N _2 RUs in the one time-frequency resource block, and corresponds to N _2 reference signal symbols, where the N _2 reference signal symbols correspond to N _1 elements of the first sequence, and the N _2 reference signal symbols are obtained by multiplying N _1 elements of the first sequence by OCC (orthogonal Code). Where N _2 is a positive integer multiple of N _ 1.
As an example of this embodiment, the N _1 reference signal symbols are obtained from the N _2 elements of the first sequence according to the following formula, which can be specifically referred to as the following formula and section 5.5.2.1.1 of TS 36.211.
Where m is equal to one of {0, 1}, and N _1 is equal to 2 × N _ 2.
Specifically, according to an aspect of the present invention, the method is characterized in that the first time-frequency resource occupies Q time-frequency resource blocks in a frequency domain, and Q is a positive integer. The RS sequence of the first reference signal is composed of K1 elements in the first sequence, the K1 is a positive integer. { the frequency-domain positions of the Q time-frequency resource blocks in the first frequency band, at least one of the Q } is used to determine the K1 elements.
As an embodiment, the time-frequency resource blocks occupy P (ms) continuously in the time domain, the time-frequency resource blocks occupy F (khz) continuously in the frequency domain, and P and F are positive rational numbers respectively.
As an example, P is equal to 1.
As one example, F is equal to 180.
As an embodiment, P and F are independent of a subcarrier spacing corresponding to the first wireless signal.
As an embodiment, the length of the time window and the frequency domain bandwidth occupied by the time-frequency resource block do not change with the change of the subcarrier spacing adopted by the transmission channel.
As an embodiment, for a given said time-frequency resource block, the number of RUs included therein is independent of the subcarrier spacing.
The embodiment makes it possible for different subcarrier intervals to share the same RS sequence, avoids adjusting the configuration information of the RS sequence according to the changed subcarrier intervals, and saves signaling overhead.
As an embodiment, the Q time-frequency resource blocks are consecutive in the frequency domain.
As an embodiment, the Q time-frequency resource blocks are discrete in the frequency domain.
As an embodiment, the K1 elements are independent of a subcarrier spacing to which the first wireless signal corresponds.
As an embodiment, the first frequency band occupies M consecutive time-frequency resource blocks in a frequency domain, each time-frequency resource block corresponds to N elements in the first sequence, and the M consecutive time-frequency resource blocks correspond to N × M elements in the first sequence. The first wireless signal occupies R time-frequency resource blocks in the first frequency band, a given time-frequency resource block is any one of the R time-frequency resource blocks, the serial number of the given time-frequency resource block in the M consecutive time-frequency resource blocks is # Z, and elements included in an RS sequence of the first reference signal corresponding to the given time-frequency resource block are element # (N x Z) to element # (N x Z + N-1) in the N x M elements in the first sequence. Wherein M and N are positive integers larger than 0, R is a positive integer not larger than M, and Z is an integer not smaller than 0 and smaller than M.
As a sub-embodiment of this embodiment, the first wireless signal is used for downlink transmission.
As a sub-embodiment of this embodiment, said K1 is equal to N × R.
As a sub-embodiment of this embodiment, N elements included in any given time-frequency resource block are consecutive in the first sequence.
As an embodiment, the first frequency band occupies M _1 consecutive time-frequency resource blocks in a frequency domain, each time-frequency resource block corresponds to N _1 elements in the first sequence, and the M _1 consecutive time-frequency resource blocks correspond to N _1 × M _1 elements in the first sequence. The first wireless signal occupies R _1 time-frequency resource blocks in the first frequency band, a given time-frequency resource block is any one of the R _1 time-frequency resource blocks, the serial number of the given time-frequency resource block in the R _1 time-frequency resource blocks is # Z _1, and elements included in an RS sequence of the first reference signal corresponding to the given time-frequency resource block are element # (N _ 1Z _1) to element # (N _ 1Z _1+ N _1-1) of the elements in the N _ 1M _1 first sequences. Wherein M _1 and N _1 are positive integers larger than 0, R _1 is a positive integer not larger than M _1, and Z _1 is an integer not smaller than 0 and smaller than M _ 1.
As a sub-embodiment of this embodiment, the first wireless signal is used for uplink transmission.
As a sub-embodiment of this embodiment, the N _1 is fixed or configurable.
As a sub-embodiment of this embodiment, the first reference signal occupies N _2 RUs in the one time-frequency resource block, and corresponds to N _2 reference signal symbols, where the N _2 reference signal symbols correspond to N _1 elements of the first sequence, and the N _1 reference signal symbols are obtained by multiplying N _2 elements of the first sequence by OCC. Where N _2 is a positive integer multiple of N _ 1.
As an auxiliary embodiment of the sub-embodiment, a quotient obtained by dividing N _2 by N _1 is equal to the number of multicarrier symbols including the first reference signal in the time-frequency resource block.
As an auxiliary embodiment of the sub-embodiment, the N _1 is equal to the number of subcarrier intervals occupied by one time-frequency resource block.
As a sub-embodiment of this embodiment, said K1 is equal to N _1 × R _ 1.
As a sub-embodiment of this embodiment, N _1 elements included in any given time-frequency resource block are consecutive in the first sequence.
Specifically, according to an aspect of the present invention, the method is characterized in that the first time-frequency resource includes a positive integer number of RUs, and the subcarrier spacing corresponding to the first wireless signal is used to determine the RU occupied by the first reference signal in the first time-frequency resource. The RU occupies one subcarrier in the frequency domain and occupies the duration of one multicarrier symbol in the time domain.
In the above aspect, the UE obtains the configuration information of the RS sequence of the first reference signal through the first information set, and then determines the subcarrier interval actually adopted by the first radio signal through the second information set, thereby implicitly determining the pattern (pattern) of the first reference signal and the mapping manner of the RS sequence, and saving signaling overhead.
As an embodiment, the subcarrier interval corresponding to the first wireless signal is a first subcarrier interval, and the time-frequency resource block occupies D subcarriers in a frequency domain and E multicarrier symbols in a time domain at the reference subcarrier interval, for a total of D × E RUs; the time frequency resource block occupies U subcarriers in the frequency domain at the first subcarrier interval, and occupies V multicarrier symbols in the time domain, for a total of U × V RUs. Wherein the reference subcarrier spacing is equal to W (kHz), and the first subcarrier spacing is equal to W2k. U is equal to D/2kV is equal to E x 2k. D is equal to U, and k is a positive integer not less than 0.
As a sub-embodiment of this embodiment, the reference subcarrier spacing is 15 kHz.
As a sub-embodiment of this embodiment, the UE determines, according to the indication of the first information set, that the first reference signal sequentially occupies N RUs in a given time-frequency resource block based on the reference subcarriers, and the N RUs are located on { RU # [ N (0) ], …, RU # [ N (i) ], …, RU # [ N (N-1) ] } RUs among all RUs in the given time-frequency resource block. And the first reference signal still occupies N RUs in a given time-frequency resource block based on the first subcarrier spacing, and the N RUs still are located on { RU # [ N (0) ], …, RU # [ N (i) ], …, RU # [ N (N-1) ] } RUs of all RUs in the given time-frequency resource block. Wherein N is a positive integer. N (0) to N (N-1) are non-negative integers.
As a sub-embodiment of this embodiment, the sequence numbers of all the RUs in the given time-frequency resource block of the N RUs are independent of the subcarrier spacing employed by the first wireless signal.
As a sub-embodiment of this embodiment, the positions of the N RUs in the given time-frequency resource block are related to the subcarrier spacing employed by the first wireless signal.
As a sub-embodiment of this embodiment, the given time-frequency resource block orders, at the reference subcarrier interval, the D × E RUs included in the given time-frequency resource block in a manner that the frequency domain is first and the time domain is second.
As an auxiliary embodiment of the sub-embodiment, the first frequency domain manner and the second time domain manner refer to that corresponding RU frequency domains on the i-th multicarrier symbol of the given time-frequency resource block are RU # { D (i-1) }, RU # { D (i-1) +1}, …, and RU # { D (i-1) + D-1}, in sequence from low to high. Wherein i is an integer of 0 or more and less than E.
As a sub-embodiment of this embodiment, the given time-frequency resource block orders, at the first subcarrier interval, the U × V RUs included in the given time-frequency resource block in a manner that the frequency domain is first and the time domain is second.
As an auxiliary embodiment of the sub-embodiment, the first frequency domain manner and the second time domain manner refer to that corresponding RU frequency domains on the i-th multicarrier symbol of the given time-frequency resource block are RU # { U (i-1) }, RU # { U (i-1) +1}, …, and RU # { U (i-1) + V-1}, in sequence from low to high. Wherein i is an integer of 0 or more and less than V.
Specifically, according to an aspect of the present invention, the method is characterized in that the second information set is used to determine one or more of { the first time/frequency resource, the MCS of the first wireless signal, the HARQ process number corresponding to the first wireless signal, the RV corresponding to the first wireless signal, and the NDI corresponding to the first wireless signal }.
As an embodiment, the second information set includes one or more of { the first time/frequency resource, the MCS of the first wireless signal, the HARQ process number corresponding to the first wireless signal, the RV corresponding to the first wireless signal, and the NDI corresponding to the first wireless signal }.
The invention discloses a method in a base station for supporting configurable subcarrier spacing, which comprises the following steps:
-step a. sending a first set of information;
-step b. sending a second set of information;
-step c. transmitting the first wireless signal on the first time-frequency resource or receiving the first wireless signal on the first time-frequency resource.
Wherein the first wireless signal comprises at least the former of { first reference signal, first data signal }. The first set of information is used to determine a first sequence, the elements comprised by the RS sequence of the first reference signal being a subset of the elements comprised by the first sequence. The first time-frequency resource belongs to a first frequency band in a frequency domain, and the number of elements in the first sequence is related to a bandwidth of the first frequency band. The second set of information is used to determine a subcarrier spacing to which the first wireless signal corresponds.
Specifically, according to an aspect of the present invention, the method is characterized in that the first time-frequency resource occupies Q time-frequency resource blocks in a frequency domain, and Q is a positive integer. The RS sequence of the first reference signal is composed of K1 consecutive elements in the first sequence, the K1 being a positive integer. { the frequency-domain positions of the Q time-frequency resource blocks in the first frequency band, at least one of the Q } is used to determine the K1 elements.
As an embodiment, the time-frequency resource blocks occupy P (ms) continuously in the time domain, the time-frequency resource blocks occupy F (khz) continuously in the frequency domain, and P and F are positive rational numbers respectively.
Specifically, according to an aspect of the present invention, the method is characterized in that the first time-frequency resource includes a positive integer number of resource units, and the subcarrier interval corresponding to the first wireless signal is used to determine the resource unit occupied by the first reference signal in the first time-frequency resource. The resource unit occupies one subcarrier in the frequency domain and occupies the duration of one multicarrier symbol in the time domain.
Specifically, according to an aspect of the present invention, the method is characterized in that the second information set is used to determine one or more of { the first time/frequency resource, the MCS of the first wireless signal, the HARQ process number corresponding to the first wireless signal, the RV corresponding to the first wireless signal, and the NDI corresponding to the first wireless signal }.
The invention discloses user equipment supporting configurable subcarrier spacing, which comprises the following modules:
-a first receiving module: for receiving a first set of information;
-a second receiving module: for receiving a second set of information;
-a first processing module: for receiving a first wireless signal on a first time-frequency resource or for transmitting a first wireless signal on a first time-frequency resource.
Wherein the first wireless signal comprises at least the former of { first reference signal, first data signal }. The first set of information is used to determine a first sequence, the elements comprised by the RS sequence of the first reference signal being a subset of the elements comprised by the first sequence. The first time-frequency resource belongs to a first frequency band in a frequency domain, and the number of elements in the first sequence is related to a bandwidth of the first frequency band. The second set of information is used to determine a subcarrier spacing to which the first wireless signal corresponds.
As one embodiment, the first processing module is configured to receive a first wireless signal on a first time-frequency resource, and the first processing module is further configured to estimate a channel experienced by the first data signal according to the first reference signal, and to decode and demodulate the first data signal.
As an embodiment, the user equipment supporting configurable subcarrier spacing is characterized in that the first time-frequency resource occupies Q time-frequency resource blocks in frequency domain, and Q is a positive integer. The RS sequence of the first reference signal is composed of K1 elements in the first sequence, the K1 is a positive integer. { the frequency-domain positions of the Q time-frequency resource blocks in the first frequency band, at least one of the Q } is used to determine the K1 elements.
As an embodiment, the ue supporting the configurable subcarrier spacing is characterized in that the first time-frequency resource includes a positive integer number of resource units, and the subcarrier spacing corresponding to the first radio signal is used to determine the resource unit occupied by the first reference signal in the first time-frequency resource. The resource unit occupies one subcarrier in the frequency domain and occupies the duration of one multicarrier symbol in the time domain.
As an embodiment, the ue supporting configurable subcarrier spacing is characterized in that the second information set is used to determine one or more of { the first time/frequency resource, the MCS of the first wireless signal, the HARQ process number corresponding to the first wireless signal, the RV corresponding to the first wireless signal, and the NDI corresponding to the first wireless signal }.
The invention discloses a base station device supporting configurable subcarrier spacing, which comprises the following modules:
-a first sending module: for transmitting a first set of information;
-a second sending module: for sending a second set of information;
-a second processing module: for transmitting a first wireless signal on the first time-frequency resource or for receiving a first wireless signal on the first time-frequency resource.
Wherein the first wireless signal comprises at least the former of { first reference signal, first data signal }. The first set of information is used to determine a first sequence, the elements comprised by the RS sequence of the first reference signal being a subset of the elements comprised by the first sequence. The first time-frequency resource belongs to a first frequency band in a frequency domain, and the number of elements in the first sequence is related to a bandwidth of the first frequency band. The second set of information is used to determine a subcarrier spacing to which the first wireless signal corresponds.
As one embodiment, the second processing module is configured to receive a first wireless signal on a first time-frequency resource, and the second processing module is further configured to estimate a channel experienced by the first data signal according to the first reference signal, and to decode and demodulate the first data signal.
Compared with the prior art, the invention has the following technical advantages:
the configuration information of the RS sequence for the first reference signal is independent of the subcarrier spacing, thereby reducing the overhead of the configuration information and reducing the complexity of the UE.
By linking the mapping manner of the first reference signal to the time-frequency resource with the subcarrier spacing, when the subcarrier spacing of the first radio signal is flexibly changed, the UE can adaptively adjust the position and sequence of the time-frequency resource occupied by the first reference signal for different subcarrier spacings, so as to implement a more flexible transmission manner.
Dynamically indicating the subcarrier spacing of the first radio signal by the second set of information to achieve a more flexible subcarrier selection and resource allocation.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 shows a flow diagram of a downstream transmission according to an embodiment of the invention;
FIG. 2 shows a flow diagram of uplink transmission according to one embodiment of the invention;
FIG. 3 is a diagram of the time-frequency resource block at a reference subcarrier spacing according to an embodiment of the present invention;
fig. 4 shows a schematic diagram of the time-frequency resource block in the first subcarrier spacing according to an embodiment of the present invention;
fig. 5 shows a schematic diagram of the relation of the first reference signal and the first sequence according to an embodiment of the invention;
fig. 6 shows a schematic diagram of the relation of the first reference signal and the first sequence according to another embodiment of the invention;
fig. 7 is a schematic diagram illustrating time-frequency resources occupied by the first reference signal at different subcarrier spacings according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating time-frequency resources occupied by the first reference signal in one time-frequency resource block at different subcarrier intervals according to an embodiment of the present invention;
fig. 9 is a schematic diagram of time-frequency resources occupied by the first reference signal in one time-frequency resource block at different subcarrier intervals according to another embodiment of the present invention;
fig. 10 shows a block diagram of a processing device in a UE according to an embodiment of the invention;
fig. 11 shows a block diagram of a processing means in a base station according to an embodiment of the invention;
Detailed Description
The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.
Example 1
Embodiment 1 illustrates a flow chart of downlink transmission according to the present invention, as shown in fig. 1. In fig. 1, base station N1 is a serving cell maintaining base station for UE U2.
For theBase station N1The first set of information is transmitted in step S10, the second set of information is transmitted in step S11, and the first wireless signal is transmitted on the first time-frequency resource in step S12.
For theUE U2The first set of information is received in step S20, the second set of information is received in step S21, and the first wireless signal is received on the first time-frequency resource in step S22.
As a sub-embodiment, the first information set includes { AP indication information of the first reference signal, SCI configured for the UE }.
As a subsidiary embodiment of the sub-embodiment, the AP indication information of the first reference signal includes at least one of { number of APs occupied by the first reference signal, number of layers }.
As a sub-embodiment, the first set of information is RRC signaling for the UE.
As a sub-embodiment, the first set of information is RRC common signaling for a serving cell of the UE.
As a sub-embodiment, the second Information set further includes Precoding Information (Precoding Information) corresponding to the first wireless signal.
As an additional embodiment of the sub-embodiment, the Precoding information includes the number of layers used by the first radio signal and the TPMI (Transmitted Precoding Matrix Indicator) used.
As a sub-embodiment, the first information set is transmitted on a PDCCH (Physical Downlink Control Channel).
As a sub-embodiment, the first information set is transmitted on an EPDCCH (Enhanced Physical Downlink Control Channel).
As a sub-embodiment, the first information set is included in DCI for downlink grant.
As a sub-embodiment, the second information set is included in DCI for downlink grant.
As a sub-embodiment, the transmission channel of the first wireless signal is a DL-SCH.
Example 2
Embodiment 2 illustrates a flow chart of downlink transmission according to the present invention, as shown in fig. 2. In fig. 2, base station N3 is the serving cell maintaining base station for UE U4.
For theBase station N3The first set of information is transmitted in step S30, the second set of information is transmitted in step S31, and the first wireless signal is received on the first time-frequency resource in step S32.
For theUE U4The first set of information is received in step S40, the second set of information is received in step S41, and the first wireless signal is transmitted on the first time-frequency resource in step S42.
As a sub-embodiment, the first set of information includes Cyclic Shift (OCC) indications and Cyclic Shift (Cyclic Shift) employed by the first reference signal.
As a sub-embodiment, the first information set includes uplink data channel reference signal configuration information.
As an auxiliary embodiment of the sub-embodiment, the uplink data channel reference signal configuration information is UL-referencesignalpusch IE in TS 36.331.
As a sub-embodiment, the second information set further includes precoding information corresponding to the first wireless signal.
As an additional embodiment of this sub-embodiment, the precoding information includes the number of layers used by the first radio signal and the TPMI used.
As a sub-embodiment, the first set of information is RRC signaling for the UE.
As a sub-embodiment, the first set of information is RRC common signaling for a serving cell of the UE.
As a sub-embodiment, the first set of information is transmitted on the PDCCH.
As a sub-embodiment, the first set of information is transmitted on EPDCCH.
As a sub-embodiment, the first set of information is included in DCI for an uplink grant.
As a sub-embodiment, the second information set is included in DCI for uplink grant.
As a sub-embodiment, the transmission channel of the first wireless signal is UL-SCH.
Example 3
Embodiment 3 illustrates a schematic diagram of the time-frequency resource block in the reference subcarrier interval according to the present invention. As shown in fig. 3, the time-frequency resource blocks occupy consecutive p (ms) in the time domain and consecutive f (khz) in the frequency domain. For the given P and F, the number of RUs occupied by the time-frequency resource block is fixed. The subcarrier interval corresponding to the time-frequency resource block is W (kHz), the length of a time window occupied by the next multicarrier symbol in the reference subcarrier interval is equal to T _1(ms), the time-frequency resource block occupies D continuous subcarriers in a frequency domain, and occupies E multicarrier symbols in a time domain. The numbers marked in each RU in the figure are for the sequence numbers of the RUs in one time-frequency resource block, and the sequence numbers are ordered from low frequency to high frequency in a frequency domain first and time domain second manner. The T _1 is equal to the quotient of the P divided by the E. The W is equal to the quotient of the F divided by the D.
As a sub-embodiment, the multi-carrier symbol is one of { OFDM symbol, OFDM symbol containing CP, SC-FDMA symbol, FBMC symbol, DFT-s-OFDM symbol containing CP }.
As a sub-embodiment, the P is fixed.
As a sub-embodiment, said F is fixed.
As a sub-embodiment, the P is configurable.
As a sub-embodiment, the F is configurable.
As a sub-embodiment, P is equal to at least one of {0.25,0.5,1,4,8,16,32 }.
As a sub-embodiment, the F is equal to at least one of {90,180,360,720 }.
Example 4
Embodiment 4 illustrates a schematic diagram of the time-frequency resource block in the first subcarrier interval according to the present invention. As shown in fig. 4, the time-frequency resource blocks occupy P (ms) continuously in the time domain and F (khz) continuously in the frequency domain, and the number of RUs occupied by the time-frequency resource blocks is fixed under the condition that P and F are fixed. When the subcarrier interval corresponding to the time frequency resource block is W x 2k(kHz), the length of a time window occupied by the next multicarrier symbol in the reference subcarrier interval is equal to T _2(ms), the time-frequency resource block occupies U continuous subcarriers in a frequency domain and V multicarrier symbols in a time domain, wherein U is equal to D/2kV is equal to E x 2k. The numbers marked in each RU in the figure are for the sequence numbers of the RUs in one time-frequency resource block, and the sequence numbers are ordered from low frequency to high frequency in a frequency domain first and time domain second manner. The T _2 is equal to the quotient of the P divided by the V. W2kEqual to the quotient of said F divided by said U.
As a sub-embodiment, the multi-carrier symbol is one of { OFDM symbol, OFDM symbol containing CP, SC-FDMA symbol, FBMC symbol, DFT-s-OFDM symbol containing CP }.
As a sub-embodiment, the P is fixed.
As a sub-embodiment, said F is fixed.
As a sub-embodiment, the P is configurable.
As a sub-embodiment, the F is configurable.
As a sub-embodiment, P is equal to at least one of {0.25,0.5,1,4,8,16,32 }.
As a sub-embodiment, the F is equal to at least one of {90,180,360,720 }.
Example 5
Embodiment 5 illustrates a schematic diagram of a relationship of the first reference signal and the first sequence according to the present invention. As shown in fig. 5, the first frequency band includes M time-frequency resource blocks in the frequency domain, a time-frequency resource block # Z marked by a thick line frame is a given time-frequency resource block occupied by the first radio signal, and # Z represents a sequence number of the given time-frequency resource block # Z in the time-frequency resource blocks occupied by the M first frequency bands. The elements of the first sequence corresponding to the time frequency resource block # Z are element # (N × Z) to element # (N × Z + N-1). And N is a positive integer and represents N elements of the first sequence corresponding to one time-frequency resource block. Z is a positive integer greater than 0 and less than M. M is a positive integer greater than 1.
As an embodiment, the first wireless signal is used for downlink transmission.
Example 6
Embodiment 6 illustrates a schematic diagram of a relationship between another of the first reference signals and the first sequence according to the present invention. As shown in fig. 6, the first wireless signal occupies R _1 time-frequency resource blocks in the first frequency band, which correspond to the R _1 time-frequency resource blocks marked by the bold frame. And the identifier in the R _1 time frequency resource blocks corresponds to the serial numbers of the time frequency resource blocks in the R _1 time frequency resource blocks. Wherein, N _1 is a positive integer, and represents N _1 elements of the first sequence corresponding to one time-frequency resource block. Z _1 is a positive integer greater than 0 and less than R _ 1. R _1 is a positive integer greater than 1.
As an embodiment, the R _1 time-frequency resource blocks all belong to the first frequency band.
As an embodiment, the R _1 time-frequency resource blocks are consecutive in the frequency domain.
As an embodiment, the R _1 time-frequency resource blocks are discrete in the frequency domain.
As one embodiment, the first wireless signal is for uplink transmission.
Example 7
Embodiment 7 illustrates a schematic diagram of time-frequency resources occupied by the first reference signal at different subcarrier intervals according to the present invention.
As shown in fig. 7, the time-frequency resource block occupies a time window equal to T _1(ms) in the reference subcarrier interval (w (khz)), and occupies D consecutive subcarriers in the frequency domain and E multicarrier symbols in the time domain. The numbers marked in each RU in the figure are for the sequence numbers of the RUs in one time-frequency resource block, and the sequence numbers are ordered from low frequency to high frequency in a frequency domain first and time domain second manner. The T _1 is equal to the quotient of the P divided by the E. Wherein D and E are both positive integers.
The time frequency resource block is spaced at the first subcarrier interval (W2)k(kHz)), the length of the time window occupied by the multicarrier symbols is equal to T _2(ms), the time-frequency resource block occupies U consecutive subcarriers in the frequency domain and V multicarrier symbols in the time domain. The numbers marked in each RU in the figure are for the sequence numbers of the RUs in one time-frequency resource block, and the sequence numbers are ordered from low frequency to high frequency in a frequency domain first and time domain second manner. The T _2 is equal to the quotient of the P divided by the V. Wherein U and V are both positive integers, and U is equal to D/2kSaid V is equal to E x 2k。
When the reference subcarrier spacing condition is met, an RU # S (bold line frame identification) in the time-frequency resource block is used for sending the first reference signal and corresponds to an element # Y in the first sequence; for the first subcarrier spacing, RU # S (bold-line box identification) in the time-frequency resource block is still used for transmitting the first reference signal and still corresponds to element # Y in the first sequence. Wherein S is an integer not less than 0 and less than D E.
As a sub-embodiment, the multi-carrier symbol is one of { OFDM symbol, OFDM symbol containing CP, SC-FDMA symbol, FBMC symbol, DFT-s-OFDM symbol containing CP }.
As one sub-embodiment, the reference subcarrier spacing and the first subcarrier spacing are different.
As a sub-embodiment, the RU # S is atIn one of said time-frequency resource blocks at said reference subcarrier spacing (subcarrier # I)1Multicarrier symbol # J1) Said RU # S is located in one of said time-frequency resource blocks at said first subcarrier spacing (subcarrier # I)2Multicarrier symbol # J2) And said I1Is not equal to the I2Or said J1Is not equal to said J2. Wherein I1Is an integer of not less than 0 and less than D, J1Is an integer of not less than 0 and less than E, I2Is an integer of not less than 0 and less than U, J2Is an integer of not less than 0 and less than V.
Example 8
Embodiment 8 illustrates a schematic diagram of time-frequency resources occupied by the first reference signal in one time-frequency resource block at different subcarrier intervals according to the present invention.
As shown in fig. 8, the time-frequency resource block occupies f (kHz) in the frequency domain, is equal to 180kHz in the continuous frequency domain, occupies p (ms) in the time domain, and occupies 96 RUs in total. And when the subcarrier interval is equal to 15kHz, the time-frequency resource block corresponds to 12 subcarriers in a frequency domain and corresponds to 8 multicarrier symbols in a time domain. And when the subcarrier interval is equal to 30kHz, the time-frequency resource block corresponds to 6 subcarriers in a frequency domain and corresponds to 16 multicarrier symbols in a time domain. Each rectangular grid in the figure corresponds to one RU, and the rectangular grids filled with the grids correspond to the positions of the RUs occupied by the first reference signals in one time frequency resource block. As shown in the figure, the 96 RUs are sorted once in a manner of frequency domain first and time domain second, corresponding to different subcarrier intervals, and the first reference signal occupies 12 RUs in the 96 RUs, namely RU #0, RU #4, RU #8, RU #12, RU #16, RU #20, RU #48, RU #52, RU #56, RU #60, RU #64 and RU # 68.
As a sub-embodiment, the first reference signal is used for transmission of downlink data.
As a sub-embodiment, the frequency domain interval between adjacent RUs occupied by the first reference signal in the frequency domain is fixed under the same subcarrier interval.
Example 9
Embodiment 9 illustrates a schematic diagram of time-frequency resources occupied by the first reference signal in one time-frequency resource block at different subcarrier intervals according to another embodiment of the present invention.
As shown in fig. 9, the time-frequency resource block occupies f (kHz) in the frequency domain, is equal to 180kHz in the continuous frequency domain, occupies p (ms) in the time domain, and occupies 96 RUs in total. And when the subcarrier interval is equal to 15kHz, the time-frequency resource block corresponds to 12 subcarriers in a frequency domain and corresponds to 8 multicarrier symbols in a time domain. And when the subcarrier interval is equal to 30kHz, the time-frequency resource block corresponds to 6 subcarriers in a frequency domain and corresponds to 16 multicarrier symbols in a time domain. Each rectangular grid in the figure corresponds to one RU, and the rectangular grids filled with the grids correspond to the positions of the RUs occupied by the first reference signals in one time frequency resource block. As shown in the figure, the 96 RUs are sorted once in a manner of frequency domain first and time domain second, corresponding to different subcarrier intervals, and the first reference signal occupies 24 RUs in the 96 RUs in sequence from RU #12 to RU #23, and from RU #72 to RU # 83.
As a sub-embodiment, the first reference signal is used for transmission of uplink data.
As a sub-embodiment, all RUs on a multicarrier symbol occupied by the first reference signal are used for transmission of the first reference signal.
Example 10
Embodiment 10 is a block diagram illustrating a processing apparatus in a UE, as shown in fig. 10. In fig. 10, the UE processing apparatus 100 mainly includes a first receiving module 101, a second receiving module 102 and a first processing module 103.
The first receiving module 101: for receiving a first set of information;
-the second receiving module 102: for receiving a second set of information;
the first processing module 103: for receiving a first wireless signal on a first time-frequency resource or for transmitting a first wireless signal on a first time-frequency resource.
Wherein the first wireless signal comprises at least the former of { first reference signal, first data signal }. The first set of information is used to determine a first sequence, the elements comprised by the RS sequence of the first reference signal being a subset of the elements comprised by the first sequence. The first time-frequency resource belongs to a first frequency band in a frequency domain, and the number of elements in the first sequence is related to a bandwidth of the first frequency band. The second set of information is used to determine a subcarrier spacing to which the first wireless signal corresponds.
As a sub-embodiment, the first processing module 103 is further configured to receive a first wireless signal on a first time-frequency resource, and the first processing module 103 is further configured to estimate a channel experienced by the first data signal according to the first reference signal, and decode and demodulate the first data signal.
As a sub-embodiment, the first reference signal is located on the first L multicarrier symbols of the first wireless signal.
As an additional embodiment of this sub-embodiment, L is not less than 1.
As a subsidiary embodiment of this sub-embodiment, the multicarrier symbol is one of { OFDM symbol, OFDM symbol containing CP, SC-FDMA symbol, FBMC symbol, DFT-s-OFDM symbol containing CP }.
Example 11
Embodiment 11 is a block diagram illustrating a processing apparatus in a base station device, as shown in fig. 11. In fig. 11, the base station device processing apparatus 200 mainly comprises a first sending module 201, a second sending module 202 and a second processing module 203.
The first sending module 201: for transmitting a first set of information;
the second sending module 202: for sending a second set of information;
the second processing module 203: for transmitting a first wireless signal on the first time-frequency resource or for receiving a first wireless signal on the first time-frequency resource.
Wherein the first wireless signal comprises at least the former of { first reference signal, first data signal }. The first set of information is used to determine a first sequence, the elements comprised by the RS sequence of the first reference signal being a subset of the elements comprised by the first sequence. The first time-frequency resource belongs to a first frequency band in a frequency domain, and the number of elements in the first sequence is related to a bandwidth of the first frequency band. The second set of information is used to determine a subcarrier spacing to which the first wireless signal corresponds.
As a sub-embodiment, the second processing module 203 is further configured to receive a first wireless signal on a first time-frequency resource, and the second processing module 203 is further configured to estimate a channel experienced by the first data signal according to the first reference signal, and decode and demodulate the first data signal.
As a sub-embodiment, the first reference signal is located on the first L multicarrier symbols of the first wireless signal.
As an additional embodiment of this sub-embodiment, L is not less than 1.
As a subsidiary embodiment of this sub-embodiment, the multicarrier symbol is one of { OFDM symbol, OFDM symbol containing CP, SC-FDMA symbol, FBMC symbol, DFT-s-OFDM symbol containing CP }.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE and the terminal in the present invention include, but are not limited to, a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted Communication device, a wireless sensor, a network card, an internet of things terminal, an RFID terminal, an NB-IOT terminal, an MTC (Machine Type Communication) terminal, an eMTC (enhanced MTC) terminal, a data card, a network card, a vehicle-mounted Communication device, a low-cost mobile phone, a low-cost tablet computer, and other wireless Communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
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