CN105262574B - A kind of CSI-RS port mapping method and device - Google Patents
A kind of CSI-RS port mapping method and device Download PDFInfo
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- CN105262574B CN105262574B CN201510595213.8A CN201510595213A CN105262574B CN 105262574 B CN105262574 B CN 105262574B CN 201510595213 A CN201510595213 A CN 201510595213A CN 105262574 B CN105262574 B CN 105262574B
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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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1893—Physical mapping arrangements
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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
- H04L5/0058—Allocation criteria
- H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
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- Computer Networks & Wireless Communication (AREA)
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Abstract
A kind of CSI-RS port mapping method and device.This method according to CoPM gather in the number of cell each cell is divided into different groups.Each cell in same a small group is configured using identical CSI-RS, each cell in different groups is configured using different CSI-RS.In turn, the CSI-RS of each cell in same a small group is mapped in the different port combination of the port CSI-RS of the group.The present invention reduces the type of CSI-RS configuration under the premise of guaranteeing to be independent of each other with the cell in a small group, to reduce the number of CoMP set zero energy CSI-RS mapping.
Description
Technical field
This application involves the communications fields, more specifically to a kind of CSI-RS port mapping method device.
Background technique
In LTE (Long-Term Evolutio, long term evolution) system, in the CoMP (Coordinated of multiple cell
Multiple Point, multipoint cooperative) under mode, the CSI-RS pilot tone of each serving cell and the PDSCH of other cooperation cells
Identical time-frequency location can be overlapped.This will generate very big interference to the accurate estimation of channel information, so must be to this
Interference is inhibited.
In order to avoid above-mentioned interference, different both ends are used in the cell of same CoPM set in the prior art scheme
CSI-RS configuration, and Muting (mute) technology is used to CSI-RS between CoMP cell, so as to reduce cooperation cell
Interference of the PDSCH to CSI-RS pilot tone.
The realization of muting can be interpreted as the CSI-RS mapping of the zero energy of serving cell from LTE physical layer protocol
(CSI-RS corresponding time-frequency domain position output power in cooperation cell is set as zero in the serving cells) and serving cell
Non-zero power CSI-RS map (being the mapping of the CSI-RS of serving cell).That is in existing technical solution, such as
Fruit CoMP set has multiple cells, then serving cell needs to realize different CSI-RS configurations the CSI- of one non-zero power
The mapping of the CSI-RS of RS mapping and multiple zero energys, increases the complexity of system design.
Summary of the invention
In view of this, the application provides a kind of CSI-RS port mapping method and device, it is each in CoMP set to reduce
The number of the zero energy CSI-RS mapping of cell.
To achieve the goals above, it is proposed that scheme it is as follows:
A kind of CSI-RS port mapping method, the method are applied to support the cell of eight antenna ends port transmissions, comprising:
According to the number of cell in CoMP set, each cell is divided intoA group, wherein N indicates CoMP set
The number of middle cell,Expression rounds up；
Each cell in same a small group is configured using identical eight ports CSI-RS, for each small in different groups
Area is configured using eight different port CSI-RS；
The CSI-RS of each cell in each group is mapped in the different port combination of eight port CSI-RS of the group,
Wherein the port combination is the port combination of 2 ports.
A kind of CSI-RS port mapping method, the method are applied to support the cell of eight antenna ends port transmissions, comprising:
According to the number of cell in CoMP set, each cell is divided intoA group, wherein N indicates CoMP set
The number of middle cell,Expression rounds up；
Each cell in same a small group is configured using identical four ports CSI-RS, for each small in different groups
Area is configured using four different port CSI-RS；
The CSI-RS of each cell in each group is mapped in the different port combination of four port CSI-RS of the group,
Wherein the port combination is the port combination of 2 ports.
A kind of CSI-RS port mapping method, the method are applied to support the cell of eight antennas, four port transmission, comprising:
According to the number of cell in CoMP set, each cell is divided intoA group, wherein N indicates CoMP set
The number of middle cell,Expression rounds up；
Each cell in same a small group is configured using identical eight ports CSI-RS, for each small in different groups
Area is configured using eight different port CSI-RS；
The CSI-RS of each cell in each group is mapped in the different port combination of eight port CSI-RS of the group,
Wherein the port combination is the port combination of 4 ports.
A kind of CSI-RS port mapping device, described device are applied to support the cell of eight antenna ends port transmissions, comprising:
Each cell is divided by first group's division unit for the number according to cell in CoMP setIt is a
Group, wherein N indicates the number of cell in CoMP set,Expression rounds up；
First CSI-RS configuration unit, for being matched to each cell in same a small group using identical eight ports CSI-RS
It sets, each cell in different groups is configured using eight different port CSI-RS；
First CSI-RS map unit, for the CSI-RS of each cell in each group to be mapped to eight port of group
In the different port combination of CSI-RS, wherein the port combination is the port combination of 2 ports.
A kind of CSI-RS port mapping device, described device are applied to support the cell of eight antenna ends port transmissions, comprising:
Each cell is divided by second group's division unit for the number according to cell in CoMP setIt is a
Group, wherein N indicates the number of cell in CoMP set,Expression rounds up；
2nd CSI-RS configuration unit, for being matched to each cell in same a small group using identical four ports CSI-RS
It sets, each cell in different groups is configured using four different port CSI-RS；
Second mapping CSI-RS map unit, for the CSI-RS of each cell in each group to be mapped to the group four
In the different port combination of port CSI-RS, wherein the port combination is the port combination of 2 ports.
A kind of CSI-RS port mapping device, described device are applied to support the cell of eight antennas, four port transmission, comprising:
Each cell is divided by third group division unit for the number according to cell in CoMP setIt is a
Group, wherein N indicates the number of cell in CoMP set,Expression rounds up；
3rd CSI-RS configuration unit, for being matched to each cell in same a small group using identical eight ports CSI-RS
It sets, each cell in different groups is configured using eight different port CSI-RS；
3rd CSI-RS map unit, for the CSI-RS of each cell in each group to be mapped to eight port of group
In the different port combination of CSI-RS, wherein the port combination is the port combination of 4 ports.
As can be seen from the above technical solutions, the invention discloses a kind of CSI-RS port mapping method and devices.This method
According to CoPM gather in the number of cell each cell is divided into different groups.Each cell in same a small group is adopted
It is configured with identical CSI-RS, each cell in different groups is configured using different CSI-RS.It in turn, will be in a small group
Each cell CSI-RS be mapped to the group the port CSI-RS different port combination in.According to LTE physical layer protocol
It is found that for the cell in identical group, since its corresponding port combination is different, the corresponding time-frequency in each port
Resource position is different, thus the CSI-RS pilot tone of the cell in identical group cooperates therewith the PDSCH of cell and will not weigh
It is stacked in identical time-frequency location, thus the present invention reduces under the premise of guaranteeing to be independent of each other with the cell in a small group
The type of CSI-RS configuration, to reduce the number of CoMP set zero energy CSI-RS mapping.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 shows a kind of flow diagram of CSI-RS port mapping method of the present invention；
Fig. 2 shows another embodiment of the present invention to disclose to obtain a kind of flow diagram of CSI-RS mapping method；
Fig. 3 shows a kind of flow diagram of CSI-RS mapping method disclosed in another embodiment of the present invention；
Fig. 4 shows a kind of structural schematic diagram of CSI-RS mapping device disclosed in another embodiment of the present invention；
Fig. 5 shows a kind of structural schematic diagram of CSI-RS mapping device disclosed in another embodiment of the present invention；
Fig. 6 shows a kind of structural schematic diagram of CSI-RS mapping device disclosed in another embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
A kind of flow diagram of CSI-RS port mapping method of the present invention is shown referring to Fig. 1.Institute in the present embodiment
The method of stating is applied particularly to support the cell of eight antenna ends port transmissions, comprising:
S101: according to the number of cell in CoMP set, each cell is divided intoA group.
Wherein N indicates the number of cell in CoMP set,Expression rounds up.It is understood that when cell
Number is that when being less than or equal to 4 more than or equal to 1, all cells are divided into same a small group, is less than or equal to when the number of cell is greater than 4
When 8, cell is divided into two cells.
S102: each cell in same a small group is configured using identical eight ports CSI-RS, in different groups
Each cell is configured using eight different port CSI-RS.
CSI-RS maximum can support 8 logic ports, and the CSI-RS of each cell is each configured to eight in the present embodiment
Port CSI-RS.It should be noted that the mapping (referring to table 1) of different CSI-RS configurations corresponding different (k', l'), wherein
nsIt is the numerical value of time slot, range is 0~19；K ' is the carrier number on each RBRB (Resource Block, resource block), model
Enclose is 0~11；L ' is the number of symbols on each time slot, and range is 0~6.Subframe type 1 is suitable for full and half duplex
Fdd mode, subframe type 2 are suitable for tdd mode.
S103: the CSI-RS of each cell in each group is mapped to the different port group of eight port CSI-RS of the group
In conjunction, wherein the port combination is the port combination of 2 ports.
It is further to note that being provided according to LTE physical layer protocol it is found that time-frequency corresponding to different port combination
Resource location is different.
By taking eight port CSI-RS as an example.LTE physical layer protocol prescribed port port0 and port1 are mapped in identical time-frequency
In the resource of domain, port port2 and port3, port port4 and port5 and port port6 and port7 are mapped in identical
In time-frequency domain resources.That is, the CSI-RS of different cells is mapped to different for for the cell of group
Port combination, if the CSI-RS of first community is mapped to port port0 and port1, the CSI-RS of second community is mapped to port
Port2 and port3, the CSI-RS of third cell are mapped to port port4 and port5, and the CSI-RS of the 4th cell is mapped to end
Mouth port6 and port7.Since mapped port combination is different, thus the CSI-RS pilot tone of the cell of identical group is assisted with it
The PDSCH for making cell will not overlap identical time-frequency location.
As seen from the above embodiment, the invention discloses a kind of CSI-RS port mapping methods.This method is according to CoPM collection
Each cell is divided into different groups by the number of cell in conjunction.For each cell in same a small group using identical
CSI-RS is configured, and each cell in different groups is configured using different CSI-RS.It in turn, will be each small in same a small group
The CSI-RS in area is mapped in the different port combination of the port CSI-RS of the group.According to LTE physical layer protocol it is found that for
For cell in identical group, since its corresponding port combination is different, the corresponding running time-frequency resource institute in each port is in place
Set difference, thus the CSI-RS pilot tone of the cell in identical group cooperate therewith cell PDSCH will not overlap it is identical
Time-frequency location, thus the present invention reduces CSI-RS configuration under the premise of guaranteeing to be independent of each other with the cell in a small group
Type, to reduce the number of CoMP set zero energy CSI-RS mapping.
Embodiment two
Another embodiment of the present invention is shown referring to fig. 2 discloses to obtain a kind of flow diagram of CSI-RS mapping method.
Compared with embodiment one, method disclosed in the present embodiment is similarly applied to the cell of eight antenna ends port transmissions.Difference
It is, the configuration of CSI-RS described in the present embodiment is configured using 4 port CSI.
Detailed process is as follows:
S201: according to the number of cell in CoMP set, each cell is divided intoA group, wherein N is indicated
The number of cell in CoMP set,Expression rounds up；
S202: each cell in same a small group is configured using identical four ports CSI-RS, in different groups
Each cell is configured using four different port CSI-RS；
S203: the CSI-RS of each cell in each group is mapped to the different port group of four port CSI-RS of the group
In conjunction, wherein the port combination is the port combination of 2 ports.
Embodiment three
Optionally, the realization principle of the above method is similarly applied to support the cell of eight antennas, four port transmission.Referring to
A kind of flow diagram of CSI-RS mapping method disclosed in Fig. 3 another embodiment of the present invention.
S301: according to the number of cell in CoMP set, each cell is divided intoA group, wherein N is indicated
The number of cell in CoMP set,Expression rounds up.
S302: each cell in same a small group is configured using identical eight ports CSI-RS, in different groups
Each cell is configured using eight different port CSI-RS.
S303: the CSI-RS of each cell in each group is mapped to the different port group of eight port CSI-RS of the group
In conjunction, wherein the port combination is the port combination of 4 ports.
Example IV
A kind of CSI-RS mapping being adapted with CSI-RS mapping method in embodiment one is disclosed in the present embodiment to fill
It sets.A kind of structural schematic diagram of CSI-RS mapping device disclosed in another embodiment of the present invention is shown referring to fig. 4.
As shown in Figure 4, which includes: first group's division unit 41, the first CSI-RS configuration unit 42 and first
CSI-RS map unit 42.
Wherein, first group's division unit is used for the number according to cell in CoMP set, and each cell is divided intoA group, wherein N indicates the number of cell in CoMP set,Expression rounds up.And then the first CSI-RS configuration
Unit configures each cell in same a small group using identical eight ports CSI-RS, and each cell in different groups is adopted
It is configured with eight different port CSI-RS.
After the completion of configuration, the CSI-RS of each cell in each group is mapped to the group by the first CSI-RS map unit
In the different port combination of eight port CSI-RS, wherein the port combination is the port combination of 2 ports.
It is optionally also individually disclosed in other embodiments disclosed by the invention and two CSI-RS mapping method of embodiment
Adaptable Installation practice, and Installation practice corresponding with three CSI-RS mapping method of embodiment.
A kind of structural schematic diagram of CSI-RS mapping device disclosed in another embodiment of the present invention is shown referring to Fig. 5.
The device includes: second group's division unit 51, the 2nd CSI-RS configuration unit 52 and the 2nd CSI-RS mapping
Unit 53.
Wherein, second group's division unit is used for the number according to cell in CoMP set, and each cell is divided intoA group, wherein N indicates the number of cell in CoMP set,Expression rounds up.
2nd CSI-RS configuration unit is used to match each cell in same a small group using identical four ports CSI-RS
It sets, each cell in different groups is configured using four different port CSI-RS.
Second mapping CSI-RS map unit is used to the CSI-RS of each cell in each group being mapped to the group four
In the different port combination of port CSI-RS, wherein the port combination is the port combination of 2 ports.
A kind of structural schematic diagram of CSI-RS mapping device disclosed in another embodiment of the present invention is shown referring to Fig. 6.
It will be appreciated from fig. 6 that device includes: third group division unit 61, the 3rd CSI-RS configuration unit 62 and the 3rd CSI-RS mapping
Unit 63.
Third group division unit is used for the number according to cell in CoMP set, and each cell is divided intoIt is a small
Group, wherein N indicates the number of cell in CoMP set,Expression rounds up.
In turn, the 3rd CSI-RS configuration unit matches each cell in same a small group using identical eight ports CSI-RS
It sets, each cell in different groups is configured using eight different port CSI-RS.
After the completion of configuration, the CSI-RS of each cell in each group is mapped to the group by the 3rd CSI-RS map unit
In the different port combination of eight port CSI-RS, wherein the port combination is the port combination of 4 ports.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, defined herein
General Principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, this hair
It is bright to be not intended to be limited to the embodiments shown herein, and be to fit to and the principles and novel features disclosed herein phase
Consistent widest scope.
Claims (6)
1. a kind of CSI-RS port mapping method, which is characterized in that the method is applied to support eight antenna ends port transmissions
Cell, comprising:
According to the number of cell in CoMP set, each cell is divided intoA group, wherein N indicates small in CoMP set
The number in area,Expression rounds up；
Each cell in same a small group is configured using identical eight ports CSI-RS, each cell in different groups is adopted
It is configured with eight different port CSI-RS；
The CSI-RS of each cell in each group is mapped in the different port combination of eight port CSI-RS of the group, wherein
The port combination is the port combination of 2 ports.
2. a kind of CSI-RS port mapping method, which is characterized in that the method is applied to support eight antenna ends port transmissions
Cell, comprising:
According to the number of cell in CoMP set, each cell is divided intoA group, wherein N indicates small in CoMP set
The number in area,Expression rounds up；
Each cell in same a small group is configured using identical four ports CSI-RS, each cell in different groups is adopted
It is configured with four different port CSI-RS；
The CSI-RS of each cell in each group is mapped in the different port combination of four port CSI-RS of the group, wherein
The port combination is the port combination of 2 ports.
3. a kind of CSI-RS port mapping method, which is characterized in that the method is applied to support eight antennas, four port transmission
Cell, comprising:
According to the number of cell in CoMP set, each cell is divided intoA group, wherein N indicates small in CoMP set
The number in area,Expression rounds up；
Each cell in same a small group is configured using identical eight ports CSI-RS, each cell in different groups is adopted
It is configured with eight different port CSI-RS；
The CSI-RS of each cell in each group is mapped in the different port combination of eight port CSI-RS of the group, wherein
The port combination is the port combination of 4 ports.
4. a kind of CSI-RS port mapping device, which is characterized in that described device is applied to support eight antenna ends port transmissions
Cell, comprising:
Each cell is divided by first group's division unit for the number according to cell in CoMP setA group,
Wherein N indicates the number of cell in CoMP set,Expression rounds up；
First CSI-RS configuration unit, for being configured to each cell in same a small group using identical eight ports CSI-RS,
Each cell in different groups is configured using eight different port CSI-RS；
First CSI-RS map unit, for the CSI-RS of each cell in each group to be mapped to eight port CSI- of the group
In the different port combination of RS, wherein the port combination is the port combination of 2 ports.
5. a kind of CSI-RS port mapping device, which is characterized in that described device is applied to support eight antenna ends port transmissions
Cell, comprising:
Each cell is divided by second group's division unit for the number according to cell in CoMP setA group,
Wherein N indicates the number of cell in CoMP set,Expression rounds up；
2nd CSI-RS configuration unit, for being configured to each cell in same a small group using identical four ports CSI-RS,
Each cell in different groups is configured using four different port CSI-RS；
Second mapping CSI-RS map unit, for the CSI-RS of each cell in each group to be mapped to four port of group
In the different port combination of CSI-RS, wherein the port combination is the port combination of 2 ports.
6. a kind of CSI-RS port mapping device, which is characterized in that described device is applied to support eight antennas, four port transmission
Cell, comprising:
Each cell is divided by third group division unit for the number according to cell in CoMP setA group,
Wherein N indicates the number of cell in CoMP set,Expression rounds up；
3rd CSI-RS configuration unit, for being configured to each cell in same a small group using identical eight ports CSI-RS,
Each cell in different groups is configured using eight different port CSI-RS；
3rd CSI-RS map unit, for the CSI-RS of each cell in each group to be mapped to eight port CSI- of the group
In the different port combination of RS, wherein the port combination is the port combination of 4 ports.
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| WO2018018633A1 (en) * | 2016-07-29 | 2018-02-01 | 华为技术有限公司 | Csi-rs transmission method and network device |
| WO2018201284A1 (en) * | 2017-05-02 | 2018-11-08 | Qualcomm Incorporated | Port group indication and port subsets in a csi-rs resource for new radio (nr) |
| CN109150435B (en) * | 2017-06-16 | 2021-05-18 | 展讯通信（上海）有限公司 | CSI-RS configuration method and device, storage medium, base station, and terminal |
| CN110875814B (en) | 2018-09-03 | 2023-05-02 | 华为技术有限公司 | Method for transmitting and receiving hybrid automatic repeat request acknowledgement information and communication device |
| CN119012223A (en) * | 2023-05-18 | 2024-11-22 | 华为技术有限公司 | Communication method and related equipment |
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