WO2011023135A1 - 信道状态信息的传输方法、装置和系统 - Google Patents
信道状态信息的传输方法、装置和系统 Download PDFInfo
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- WO2011023135A1 WO2011023135A1 PCT/CN2010/076441 CN2010076441W WO2011023135A1 WO 2011023135 A1 WO2011023135 A1 WO 2011023135A1 CN 2010076441 W CN2010076441 W CN 2010076441W WO 2011023135 A1 WO2011023135 A1 WO 2011023135A1
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- state information
- channel state
- mobile terminal
- base stations
- channel
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Classifications
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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
- H04B7/022—Site diversity; Macro-diversity
- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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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
- 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
- H04B7/0658—Feedback reduction
- H04B7/066—Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
-
- 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
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
-
- 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
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
Definitions
- the present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for transmitting channel state information.
- a base station In a multiple-input multiple-output (MIMO) system, a base station (BS) needs to obtain channel state information (CSI) from a mobile station (MS) according to the CSI.
- the information communicates with the MS using space division multiple access technology. Due to the limitation of the number of bits to be encoded, it is difficult for the MS to transmit perfect CSI information to the BS. In order to enable the BS to acquire CSI information, the MS transmits limited CSI information to the BS in a manner that quantizes the perfect CSI information.
- a codebook for quantizing CSI information of a channel between a BS and an MS is preset, and the MS uses the codebook to quantize CSI information, and sends the quantized CSI information.
- the MS uses the codebook to quantize CSI information, and sends the quantized CSI information.
- the inventors have found that in a cooperative MIMO system, the number of cooperative BSs is dynamically changed according to the MS location change, and thus it is not possible to set a cooperative MIMO system for cooperation between the cooperative BS and the MS in advance.
- the CSI information of the inter-channel performs a quantized codebook, thereby causing the MS to fail to transmit CSI information to the cooperative BS.
- Embodiments of the present invention provide a method, apparatus, and system for transmitting channel state information capable of transmitting channel state information in a cooperative MIMO system.
- the embodiment of the present invention adopts the following technical solutions:
- a method for transmitting channel state information includes: acquiring a mobile terminal and two or more cooperative base stations Between the channel state information and the single-cell codebook between the mobile terminal and each of the two or more cooperative base stations, the channel state information is separately quantized to obtain the quantized And a joint codeword index of the channel state information in the single cell codebook; and a joint codeword index of the quantized channel state information in the single cell codebook.
- a method for transmitting channel state information includes: acquiring an association codeword index of channel state information between a mobile terminal and two or more cooperating base stations in a single cell codebook, where the single cell codebook is the mobile a single-cell codebook corresponding to each of the two or more coordinated base stations; searching for a codeword in the single-cell codebook according to the joint codeword index, acquiring the mobile terminal and collaborating with two or more Channel state information between base stations.
- a mobile terminal includes:
- a first acquiring unit configured to acquire channel state information between the mobile terminal and two or more cooperative base stations
- a second acquiring unit configured to separately perform channel state information acquired by the first acquiring unit according to a preset single-cell codebook between the mobile terminal and each of the two or more coordinated base stations Quantizing, obtaining a joint codeword index of the quantized channel state information in the single cell codebook;
- a sending unit configured to send a joint codeword index of the quantized channel state information acquired by the second acquiring unit in the single cell codebook.
- a base station comprising:
- a first acquiring unit configured to acquire a joint codeword index of the channel state information between the mobile terminal and the two or more coordinated base stations in the single-cell codebook, where the single-cell codebook is the mobile terminal and the a single-cell codebook corresponding to each of two or more cooperative base stations;
- a second acquiring unit configured to search for a codeword in the single-cell codebook according to the joint codeword index acquired by the first acquiring unit, and acquire channel state information between the mobile terminal and two or more coordinated base stations.
- a communication system comprising: a mobile terminal, configured to acquire channel state information between two or more cooperative base stations, according to a preset single cell codebook between each of the two or more coordinated base stations And respectively, the channel state information is quantized, the joint codeword index of the quantized channel state information in the single cell codebook is obtained, and the joint codeword index is sent to the cooperative base station; Referring to the joint codeword index sent by the mobile terminal, searching for the codeword in the single-cell codebook according to the joint codeword index, and acquiring channel state information.
- the method, device, and system for transmitting channel state information provided by the embodiments of the present invention can separately quantize channel state information according to a single-cell codebook between a mobile terminal and a base station between each of two or more coordinated base stations.
- the purpose of transmitting channel state information in the output system solves the problem that the prior art cannot set a codebook for the cooperative multiple input multiple output system due to the change of the number of cooperative base stations, thereby causing the problem that channel state information cannot be transmitted in the cooperative multiple input multiple output system;
- the embodiment of the present invention uses the single-cell codebook to quantize the channel state information between the mobile terminal and the two or more coordinated base stations, so that the technical solution provided by the embodiment of the present invention is more flexible and scalable.
- FIG. 1 is a flowchart of a method for transmitting channel state information according to an embodiment of the present invention
- FIG. 2 is a flowchart of a method for transmitting channel state information according to another embodiment of the present invention
- FIG. 3 is a channel according to another embodiment of the present invention
- FIG. 4 is a flowchart of a method for transmitting channel state information according to still another embodiment of the invention shown in FIG.
- FIG. 5 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention
- FIG. 6 is a schematic structural diagram of a first acquiring unit in a mobile terminal according to an embodiment of the present invention shown in FIG.
- FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention
- FIG. 9 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
- a method for transmitting channel state information includes: Step 101: Acquire CSI information between an MS and two or more cooperative BSs; Step 102, according to preset MSs and two or more a single-cell codebook between each BS in the cooperative BS, and respectively quantizing the CSI information acquired in step 101, and obtaining a joint codeword index of the quantized CSI information in the single-cell codebook; Step 103, sending step 102 The joint codeword index of the obtained quantized CSI information in the single cell codebook.
- the method for transmitting channel state information can separately quantize CSI information according to a single-cell codebook between a preset MS and each of two or more coordinated BSs, and quantize the CSI.
- the joint codeword index of the information in the single-cell codebook is sent to the base station, thereby achieving the purpose of transmitting CSI information in the cooperative MIMO system, and solving the problem that the prior art cannot set the codebook for the cooperative MIMO system due to the change of the number of cooperative BSs.
- the embodiment of the present invention uses the single-cell codebook to separately quantize the CSI information between the MS and the two or more cooperative BSs, so the technical solution provided by the embodiment of the present invention is flexible and scalable. More sexual.
- another embodiment of the present invention further provides a method for transmitting channel state information, including:
- Step 201 Acquire an joint codeword index of the CSI information between the MS and the two or more coordinated BSs in the single-cell codebook, where the single-cell codebook is the MS corresponding to each of the two or more coordinated BSs.
- Single cell codebook
- Step 202 Search for the codeword in the single-cell codebook according to the joint codeword index obtained in step 201, and obtain CSI information between the MS and the two or more cooperative BSs.
- the method for transmitting channel state information can obtain the joint codeword index of the CSI information between the MS and the two or more coordinated BSs in the single cell codebook, and search for the single cell code according to the joint codeword index.
- the CSI information between the MS and the two or more cooperating BSs is obtained, so that the problem that the prior art cannot set a codebook for the cooperative MIMO system due to the change of the number of cooperative BSs is solved, and the CSI information is transmitted in the cooperative MIMO system. purpose.
- the cooperative MIMO system includes N (N is an integer greater than or equal to 2) mutually cooperating BSs, and the N cooperative BSs simultaneously serve K (K is a natural number) MSs. , when the kth ( k [l, K] ) MSs need to feed back to N cooperating BSs
- the CSI information is a method for transmitting channel state information according to another embodiment of the present invention, include:
- Step 301 The MS acquires CSI information between the N cooperative BSs.
- step 301 can include:
- Step 401 the aggregated channel matrix H k and a channel between the MS acquires the BS N cooperative loss G k.
- the MS can also detect the channel loss G k according to the measurement information sent by the N cooperating BSs, where G k is composed of the path loss and the log-normal shadow effect, and eR + x is a diagonal matrix,
- Step 403 The MS obtains CSI information between the MS and the N cooperating BSs according to the normalized aggregated channel matrix/f ⁇ , where the CSI information is specifically the MS and the N cooperative BSs.
- the row space basis of the normalized aggregated channel matrix ⁇ ) is specifically the MS and the N cooperative BSs.
- the orthogonal basis is simplified as V.
- Step 302 The MS separately quantizes the CSI information according to the preset single-cell codebook between each of the N mutually cooperating BSs, and obtains the joint codeword of the quantized CSI information in the single-cell codebook. index.
- the single-cell codebook is ⁇ , ⁇ , % V , where excreted e[l,N] ) is the kth MS and the first
- Single-cell codebook between n BSs, ⁇ has a size of 2 ⁇ , and is MS inverse
- all single-cell codebooks can be designed to be the same size.
- the MS uses the single-cell codebook to quantize the CSI information, and obtains the joint codeword index of the quantized CSI information in the single-cell codebook, including:
- the MS uses the codewords of the single cell codebooks corresponding to the BSs, ⁇ , ..., % ⁇ , respectively, for the normalized between the MS obtained in step 301 and the mutually cooperating BSs.
- the row space basis of the aggregated channel matrix ⁇ ⁇ ) is quantized;
- the MS obtains the quantized joint codeword index in the single-cell codebook 1 , %, 2 , , ⁇ ⁇ according to the following formula ( 2 ):
- Step 303 The MS sends the joint codeword index of the quantized CSI information in the single cell codebook to the mutually cooperating BSs.
- the MS sends a joint codeword index corresponding to each of the BSs. For example, the MS sends a joint codeword index corresponding to the first BS to the first BS.
- the second BS sends the joint codeword index 2 corresponding thereto, and so on, and sends the joint codeword index N corresponding thereto to the Nth BS;
- the MS When the BSC is deployed on a certain BS, if deployed on the first BS, the MS sends all joint codeword indexes [JK 2 , . . . , J ] corresponding to the N mutually cooperative BSs to the BS.
- This embodiment is described by taking the BSC deployment on a certain BS as an example.
- Step 304 The BS receives the joint codeword index of the CSI information fed back by the MS in the single cell codebook.
- the BSC is deployed on the first BS, and the BS receives all the joint codeword indexes sent by the MS, ..., ].
- Step 305 The BS searches for a codeword in the single-cell codebook according to the joint codeword index, and obtains CSI information between the MS and the N mutually cooperating BSs, where the CSI information is specifically an MS and N cooperative BSs.
- the BS may query the single-cell codebooks ⁇ ⁇ , ⁇ 3 ⁇ 4, 2 , . . . , ⁇ ⁇ according to the joint codeword index [J , J , . . . , ⁇ ] to obtain the MS and the mutually cooperating BS.
- the BS may communicate with the MS according to the CSI information. As shown in FIG. 3, it may also include:
- Step 306 The BS acquires an aggregate channel matrix between the MS and the N cooperative BSs according to the CSI information ⁇ ⁇ ) and the pre-acquired channel loss.
- Step 307 The BS communicates with the MS according to the aggregated channel matrix, including:
- the BS When the BS needs to communicate with the kth MS, the BS acquires the aggregate channel matrix of other MSs except the kth MS! ⁇ ⁇ , ⁇ ... ⁇ ! ⁇ ..., ! ⁇ ;
- the BS performs SVD decomposition on the above H to obtain null space Null (H) of other MSs other than the kth MS;
- the step 305 further includes: the BS sending the CSI information fed back by the MS to the BSC in the joint codebook, in step 306,
- the BSC searches for the codeword in the joint codebook according to the joint codeword index, acquires CSI information between the MS and the N mutually cooperating BSs, and sends the CSI information to the BS.
- the method for transmitting channel state information provided by the embodiment of the present invention can be respectively performed between the MS and the N cooperative BSs according to a single-cell codebook between each of the MSs and the N mutually cooperating BSs.
- the CSI information is quantized, and the joint codeword index of the quantized CSI information in the single-cell codebook is sent to the BS, and the BS obtains the channel state information by searching the single-cell codebook according to the joint codeword index, thereby achieving the cooperative MIMO system.
- the purpose of the CSI information is transmitted; since the CSI information is obtained according to the aggregated channel matrix quantized by the channel loss, the technical solution provided by the embodiment of the present invention removes the influence of the channel loss between the MS and the different BS on the transmitted CSI information.
- the technical solution provided by the embodiment of the present invention is more flexible and scalable.
- an embodiment of the present invention further provides a mobile terminal, including:
- the first acquiring unit 501 is configured to acquire channel state information between the mobile terminal and two or more cooperative base stations;
- a second acquiring unit 502 configured to separately acquire, according to a preset single channel codebook between the mobile terminal and each of the two or more coordinated base stations, a channel state acquired by the first acquiring unit 501 The information is quantized, and the joint codeword index of the quantized channel state information in the single cell codebook is obtained;
- the sending unit 503 is configured to send the joint codeword index of the quantized channel state information acquired by the second acquiring unit 502 in the single cell codebook.
- the first acquiring unit 501 may include:
- a first obtaining subunit 5011 configured to acquire an aggregated channel matrix and a channel loss between the mobile terminal and the two or more coordinated base stations
- the normalization subunit 5012 is configured to perform normalization processing on the aggregated channel matrix by using a channel loss acquired by the first obtaining subunit 5011, to obtain a normalized aggregated channel matrix;
- the second obtaining subunit 5013 is configured to acquire channel state information between the mobile terminal and the two or more cooperative base stations according to the normalized aggregate channel matrix acquired by the normalization subunit 5012.
- the normalized aggregate channel matrix acquired by the normalization subunit 5012. For the specific implementation method of the mobile terminal provided by the embodiment of the present invention, reference may be made to the method for transmitting channel state information provided by the embodiment of the present invention, and details are not described herein again.
- the mobile terminal provided by the embodiment of the present invention can obtain the joint codebook between the N and the mutually cooperating BSs according to the preset single-cell codebook, and use the joint codebook to perform CSI information. Quantizing, transmitting the joint codeword index of the quantized CSI information in the joint codebook to the BS, thereby achieving the purpose of transmitting CSI information in the cooperative MIMO system; since the CSI information is the aggregated channel quantized according to the used channel loss Obtained by the matrix, the technical solution provided by the embodiment of the present invention removes the influence of the channel loss between the MS and the different BSs on the transmission CSI information.
- the prior art has different channel loss between the MS and different BSs due to the change of the number of cooperative BSs.
- the embodiment of the present invention uses the single-cell codebook to separately perform the CSI information between the MS and the two or more cooperative BSs. Quantification, so the technical solution provided by the embodiment of the present invention is more flexible and scalable.
- an embodiment of the present invention further provides a base station, including:
- the first acquiring unit 701 is configured to obtain a joint codeword index of the channel state information between the mobile terminal and the two or more coordinated base stations in the single-cell codebook, where the single-cell codebook is the mobile terminal and the a single-cell codebook corresponding to each of the two or more coordinated base stations;
- the second obtaining unit 702 is configured to search for a codeword in the single-cell codebook according to the joint codeword index acquired by the first acquiring unit 701, and obtain a channel state between the mobile terminal and two or more coordinated base stations. information.
- the base station may further include:
- a third acquiring unit 703, configured to acquire channel state information according to the second acquiring unit 702 ⁇ ( ⁇ )
- a pre-acquired channel loss acquiring an aggregated channel matrix between the mobile terminal and the two or more cooperative base stations.
- the communication unit 704 is configured to communicate with the mobile terminal according to the aggregated channel matrix acquired by the third acquiring unit 703.
- the base station provided by the embodiment of the present invention is capable of acquiring the joint codeword index of the CSI information between the MS and the two or more cooperative BSs in the joint codebook, and searching for the joint codebook according to the joint codeword index, acquiring the MS and the two
- the CSI information between the cooperative BSs is composed of a single-cell codebook. Therefore, the problem that the prior art cannot set a codebook for the cooperative MIMO system due to the change of the number of cooperative BSs is solved, and the cooperative MIMO is achieved.
- an embodiment of the present invention further provides a communication system, including:
- the mobile terminal 901 is configured to acquire channel state information between the two or more cooperative base stations 802, according to a preset single-cell codebook and each of the two or more cooperative base stations 902, respectively.
- the channel state information is quantized, and the joint codeword index of the quantized channel state information in the single cell codebook is obtained, and the joint codeword index is sent to the cooperative base station 902;
- the cooperative base station 902 is configured to receive a joint codeword index sent by the mobile terminal 901, and search for a codeword in the single-cell codebook according to the joint codeword index to obtain channel state information.
- the communication system provided by the embodiment of the present invention can be based on two preset mobile terminals and two or more a single-cell codebook between each base station in the coordinated base station, respectively quantizing the channel state information, and transmitting the combined codeword information in the single-cell codebook to the base station, and the base station can
- the joint codeword index finds the joint codebook to obtain channel state information, thereby achieving the purpose of transmitting channel state information in the cooperative multiple input multiple output system, and solves the problem that the prior art cannot be set for the cooperative multiple input multiple output system due to the change of the number of cooperative base stations.
- Embodiments of the present invention provide a method, an apparatus, and a system for transmitting channel state information that can be applied in collaboration.
- CSI information transmission is implemented in a cooperative MIMO system.
- a person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as ROM/RAM, magnetic. Disc or CD.
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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BRPI1011932A BRPI1011932B8 (pt) | 2009-08-28 | 2010-08-28 | Método para transmitir uma informação de estado de canal, terminal móvel, estação base e sistema de comunicação |
EP10811295.4A EP2456087B1 (en) | 2009-08-28 | 2010-08-28 | Method, device and system for transmitting channel state information |
US13/339,059 US8750150B2 (en) | 2009-08-28 | 2011-12-28 | Method, apparatus and system for transmitting channel state information |
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CN200910171411A CN102006108B (zh) | 2009-08-28 | 2009-08-28 | 信道状态信息的传输方法、装置和系统 |
CN200910171411.6 | 2009-08-28 |
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US13/339,059 Continuation US8750150B2 (en) | 2009-08-28 | 2011-12-28 | Method, apparatus and system for transmitting channel state information |
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EP (1) | EP2456087B1 (zh) |
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CN101340222A (zh) * | 2008-08-13 | 2009-01-07 | 中国科学技术大学 | 莱斯信道下的多用户系统自适应反馈方法 |
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EP2456087B1 (en) | 2013-10-09 |
EP2456087A4 (en) | 2012-05-23 |
CN102006108B (zh) | 2012-10-03 |
EP2456087A1 (en) | 2012-05-23 |
BRPI1011932B1 (pt) | 2021-01-05 |
BRPI1011932B8 (pt) | 2021-10-26 |
CN102006108A (zh) | 2011-04-06 |
BRPI1011932A2 (pt) | 2016-04-19 |
US20120106384A1 (en) | 2012-05-03 |
US8750150B2 (en) | 2014-06-10 |
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