WO2014100975A1 - Procédé, dispositif et système de création de rapport de qualité de voie - Google Patents

Procédé, dispositif et système de création de rapport de qualité de voie Download PDF

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Publication number
WO2014100975A1
WO2014100975A1 PCT/CN2012/087428 CN2012087428W WO2014100975A1 WO 2014100975 A1 WO2014100975 A1 WO 2014100975A1 CN 2012087428 W CN2012087428 W CN 2012087428W WO 2014100975 A1 WO2014100975 A1 WO 2014100975A1
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WIPO (PCT)
Prior art keywords
channel
channel quality
data stream
spatial correlation
user equipment
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PCT/CN2012/087428
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English (en)
Chinese (zh)
Inventor
肖洁华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2012/087428 priority Critical patent/WO2014100975A1/fr
Priority to CN201280002511.6A priority patent/CN104041105A/zh
Publication of WO2014100975A1 publication Critical patent/WO2014100975A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0204—Channel estimation of multiple channels

Definitions

  • the present invention relates to communications technologies, and in particular, to a channel quality reporting method, apparatus, and system. Background technique
  • GERAN GSM/EDGE Radio Access Network
  • the base station on the network side in order to accurately determine the transmission mode of the downlink data, for example, selecting an appropriate transmission power and selecting an appropriate one.
  • the quality information of the downlink channel is reported by the user equipment to the base station, so that the base station determines the transmission mode of the downlink data according to the channel quality information.
  • the user equipment of the GERAN system reports only one channel quality report for one physical channel of the same time frequency, and the base station determines the downlink data transmission mode of the physical channel according to the channel quality information reported by the channel quality report.
  • the spatial dimension is introduced, so that it is possible to transmit multiple data in parallel in one physical channel of the same time-frequency resource.
  • the channel increases the channel resources.
  • the base station needs to determine the transmission mode of the downlink data according to the channel quality of the multi-stream. However, since there is no multi-stream channel quality reporting method, the base station cannot obtain sufficient basis in the MIMO case. Information, so that it is impossible to accurately select the appropriate data transmission method. Summary of the invention
  • the embodiment of the invention provides a channel quality reporting method, device and system, so as to implement multi-data channel quality reporting in the case of MIMO.
  • the first aspect provides a channel quality reporting method, including:
  • the indication information includes: a training sequence or a sending status of a downlink data stream.
  • the channel quality information includes: a quality parameter of the subchannel where the multiple data stream is located, and/or used for A spatial correlation value representing a spatial correlation between the multiple data streams.
  • the spatial correlation value is a quantized value of channel correlation of a subchannel in which the multiple data stream is located, Or the recommended value of the downlink data stream transmission mode is the downlink data stream transmission mode.
  • the method when the spatial correlation value is a recommended value of the downlink data stream sending manner, the method further includes:
  • the base station is specifically configured to: send the channel quality information to a downlink packet acknowledgement/non-acknowledgement message to the base station.
  • the channel quality information includes a quality parameter of a subchannel where the multiple data stream is located, and is used to indicate the
  • the downlink packet acknowledgement/non-acknowledgement message includes:
  • one of the plurality of channel cells is the downlink packet a channel quality report cell in the acknowledge/non-acknowledgement message, configured to carry one of channel quality parameters of a subchannel in which the multiple data stream is located; a channel cell other than the channel quality report cell and the related message The element is newly added in the downlink packet acknowledgment/non-acknowledgement message.
  • the second aspect provides a channel quality reporting method, including: And transmitting, to the user equipment, indication information for indicating a channel feature, so that the user equipment determines, according to the indication information, a sending status of the downlink data stream, and when the sending status of the downlink data stream is a multi-data stream, acquiring Channel quality information of the multiple data stream;
  • the channel quality information includes: a quality parameter of a subchannel where the multiple data stream is located, and/or a spatial correlation between the multiple data streams Spatial correlation value.
  • the spatial correlation value is a quantized value of channel correlation of a subchannel in which the multiple data stream is located, Or the recommended value of the downlink data stream transmission mode is the downlink data stream transmission mode.
  • the receiving the user The channel quality information sent by the device is specifically as follows:
  • the channel quality information includes a quality parameter of a subchannel where the multiple data stream is located, and is used to indicate the When the spatial correlation value of spatial correlation between multiple data streams is;
  • the downlink packet acknowledgement/non-acknowledgement message includes:
  • a plurality of channel cells for carrying channel quality parameters of the subchannel in which the multiple data streams are located, and associated cells for carrying the spatial correlation value, respectively, among the plurality of channel cells One is a channel quality report cell in the downlink packet acknowledgement/non-acknowledgement message, configured to carry one of channel quality parameters of a subchannel in which the multiple data stream is located; and a channel letter other than the channel quality report cell The element and the associated cell are added to the downlink packet acknowledgement/non-acknowledgement message.
  • a user equipment including:
  • a determining module configured to determine, according to indication information used by the base station to indicate a channel feature, a sending status of the downlink data stream
  • An acquiring module configured to acquire channel quality information of the multiple data stream when the sending status of the downlink data stream is multiple data stream transmission;
  • a sending module configured to send the channel quality information to the base station.
  • the indication information includes: a training sequence or a sending status of a downlink data stream.
  • the channel quality information includes: a quality parameter of a subchannel where the multiple data stream is located / or a spatial correlation value used to represent the spatial correlation between the multiple data streams.
  • the spatial correlation value is a quantized value corresponding to a channel correlation of a subchannel in which the multiple data stream is located
  • the recommended value of the downlink data stream transmission mode is the downlink data stream transmission mode.
  • the downlink data stream sending manner further includes:
  • a comparison module configured to: when the spatial correlation value is a recommended value of the downlink data stream transmission manner, before the channel quality information is sent to the base station, the channel of the subchannel where the multiple data stream is located The eigenvalue difference of the correlation matrix or the rank of the channel matrix is compared with a preset threshold to obtain a recommended value downlink data stream transmission manner of the downlink data stream transmission mode.
  • the sending module is specific And transmitting, by the channel quality information, a downlink packet acknowledgement/non-acknowledgement message to the base station.
  • the channel quality information includes a quality parameter of a subchannel where the multiple data stream is located, and is used to indicate the When the spatial correlation value of spatial correlation between multiple data streams is;
  • the downlink packet acknowledgement/non-acknowledgement message includes:
  • One is a channel quality report cell in the downlink packet acknowledgement/non-acknowledgement message, used for Carrying one of channel quality parameters of the subchannel in which the multiple data stream is located; the channel cell other than the channel quality report cell and the related cell are added in the downlink packet acknowledgement/non-acknowledgement message Powerful.
  • a base station including:
  • the information sending module is configured to send, to the user equipment, indication information for indicating a channel feature, so that the user equipment determines, according to the indication information, a sending status of the downlink data stream, and the sending status of the downlink data stream is Obtaining channel quality information of the multiple data stream when the data stream is sent;
  • the channel quality information includes: a quality parameter of a subchannel where the multiple data stream is located, and/or a spatial correlation between the multiple data streams Spatial correlation value.
  • the spatial correlation value is a quantized value of channel correlation of a subchannel in which the multiple data stream is located, Or the recommended value of the downlink data stream transmission mode is the downlink data stream transmission mode.
  • the receiving module is specifically used to Receiving a downlink packet acknowledgement/non-acknowledgment message sent by the user equipment, where the downlink packet acknowledgement/non-confirmation message carries the channel quality information.
  • the fifth aspect provides a system, comprising: the user equipment in any possible implementation manner of the third aspect, and the base station in any possible implementation manner of the fourth aspect.
  • a user equipment including:
  • a processor configured to determine, according to indication information used by the base station to indicate a channel feature, a transmission status of the downlink data stream; and when the transmission status of the downlink data stream is a multi-data stream, acquire the channel of the multiple data stream Quality information; transmitting the channel quality information to the base station;
  • a memory configured to store channel quality information of the multiple data streams.
  • the indication information includes: a training sequence or a sending status of a downlink data stream.
  • the channel quality information includes: a quality parameter of a subchannel where the multiple data stream is located And/or a spatial correlation value for representing a spatial correlation between the multiple data streams.
  • the spatial correlation value is a quantized value of channel correlation of the subchannel where the multiple data stream is located, or is downlink data. The recommended value for the stream delivery method.
  • the processor is further configured to: when the spatial correlation value is a recommended value of the downlink data stream sending manner Comparing the eigenvalue difference of the channel correlation matrix of the subchannel in which the multiple data stream is located or the rank of the channel matrix with a preset threshold to obtain the downlink data, before sending the channel quality information to the base station The recommended value for the stream delivery method.
  • the processor is further used to The channel quality information is carried in a downlink packet acknowledgement/non-acknowledgement message to the base station.
  • the channel quality information includes a quality parameter of a subchannel where the multiple data stream is located, and a used to represent the multiple data stream
  • the downlink packet acknowledgement/non-confirmation message includes:
  • a plurality of channel cells for carrying channel quality parameters of the subchannel in which the multiple data streams are located, and associated cells for carrying the spatial correlation value, respectively, among the plurality of channel cells One is a channel quality report cell in the downlink packet acknowledgement/non-acknowledgement message, configured to carry one of channel quality parameters of a subchannel in which the multiple data stream is located; and a channel letter other than the channel quality report cell The element and the associated cell are added to the downlink packet acknowledgement/non-acknowledgement message.
  • a base station including:
  • the processor is configured to send indication information for indicating a channel feature to the user equipment, so that the user equipment determines, according to the indication information, a sending status of the downlink data stream, and the sending status of the downlink data stream is multiple data. Obtaining channel quality information of the multiple data stream when the stream is sent; receiving channel quality information of the multiple data stream sent by the user equipment;
  • the channel quality information includes: a quality parameter of a subchannel where the multiple data stream is located, and/or used to indicate a spatial correlation between the multiple data streams Spatial correlation value.
  • the spatial correlation value is a quantized value of channel correlation of a subchannel where the multiple data stream is located, or is downlink data.
  • the recommended value for the stream delivery method is a quantized value of channel correlation of a subchannel where the multiple data stream is located, or is downlink data.
  • the processor is specifically configured to receive A downlink packet acknowledgement/non-acknowledgement message sent by the user equipment, where the downlink packet acknowledgement/non-confirmation message carries the channel quality information.
  • the technical effects of the channel quality reporting method, apparatus, and system provided by the embodiments of the present invention are as follows: determining, by using the indication information sent by the base station, the transmission status of the downlink data stream of one physical channel, and acquiring the multiple data when the multiple data stream is sent.
  • the channel quality information corresponding to the stream is reported to the base station, and the channel quality of the multi-stream is reported in the MIMO case, so that the base station can accurately determine the channel quality information of the multi-stream according to the reported MIMO.
  • Embodiment 1 is a flowchart of Embodiment 1 of a channel quality reporting method according to the present invention
  • Embodiment 2 is a flowchart of Embodiment 2 of a channel quality reporting method according to the present invention
  • Embodiment 3 is a flowchart of Embodiment 3 of a channel quality reporting method according to the present invention.
  • FIG. 4A and FIG. 4B are schematic structural diagrams of a channel model according to Embodiment 4 of the channel quality method of the present invention.
  • Embodiment 5 is a schematic diagram of spatial correlation values and difference thresholds of Embodiment 5 of a channel quality reporting method according to the present invention
  • FIG. 6 is a schematic diagram of a method for reporting channel quality in the sixth embodiment of the present invention. Schematic diagram of throughput under correlation values;
  • FIG. 7 is a schematic structural diagram of a channel quality information storage space in Embodiment 7 of a channel quality reporting method according to the present invention.
  • Embodiment 8 is a schematic structural diagram of Embodiment 8 of a user equipment according to the present invention.
  • Embodiment 9 is a schematic structural diagram of Embodiment 9 of a user equipment according to the present invention.
  • Embodiment 10 is a schematic structural diagram of Embodiment 10 of a base station according to the present invention.
  • Figure 11 is a schematic structural view of Embodiment 11 of the system of the present invention.
  • FIG. 12 is a schematic structural diagram of an entity of an embodiment of a user equipment according to the present invention.
  • FIG. 13 is a schematic structural diagram of an entity of an embodiment of a base station according to the present invention. detailed description
  • Embodiment 1 is a flowchart of Embodiment 1 of a channel quality reporting method according to the present invention.
  • the method in this embodiment is, for example, performed by a user equipment.
  • the channel quality reporting method in this embodiment includes:
  • Step 101 Determine, according to indication information used by the base station to indicate a channel feature, a transmission status of the downlink data stream.
  • the indication information for indicating the channel characteristics includes: a training sequence or a transmission status of the downlink data stream; and the user equipment determines the transmission status of the downlink data stream according to the indication information sent by the base station for indicating the channel characteristics.
  • the transmission status of the downlink data stream refers to that there are several downlink data stream transmissions simultaneously in one physical channel, which may be multiple data stream transmission and single data stream transmission, and multiple data stream transmission indicates that there are two or more data streams.
  • the data stream is simultaneously transmitted in one physical channel.
  • Step 102 When the sending status of the downlink data stream is multiple data stream transmission, obtain channel quality information of the multiple data stream, and send the channel quality information to the base station.
  • the channel quality information includes: a channel quality parameter of the subchannel where the multiple data stream is located and/or a spatial correlation value used to represent a spatial correlation between the multiple data streams.
  • the user equipment sends the obtained channel quality parameter of the multi-data stream to the base station, so that the base station determines the sending manner of the downlink data stream according to the channel quality parameter of the multi-data stream, where the sending manner of the downlink data stream includes single data.
  • the selection of the stream and multi-stream transmission mode may also include a Modulation and Coding Scheme (hereinafter referred to as MCS) selection, transmission power, and the like.
  • MCS Modulation and Coding Scheme
  • the user equipment determines the sending status of the downlink data stream by receiving the indication information sent by the base station, and obtains the channel quality information of the multiple data stream when the multiple data stream is sent, and the channel quality information is obtained.
  • the reporting to the base station enables the reporting of the multi-stream channel quality in the case of MIMO, so that the base station can accurately select the appropriate downlink data stream transmission mode in the MIMO case according to the channel quality information of the reported multi-stream.
  • Embodiment 2 is a flowchart of Embodiment 2 of a channel quality reporting method according to the present invention.
  • the method in this embodiment is performed by, for example, a base station.
  • the channel quality reporting method in this embodiment includes:
  • Step 201 Send indication information for indicating a channel feature to the user equipment.
  • the base station sends the indication information to the user equipment, so that the user equipment determines the sending status of the downlink data stream according to the sent indication information, and when the sending status of the downlink data stream is multiple data stream transmission, Obtaining channel quality information of the multiple data.
  • the multi-stream transmission indicates that there are two or more data streams simultaneously transmitted in one physical channel, so that the user equipment can know the state of the data stream included in the current physical channel according to the multi-data stream transmission status.
  • Step 202 Receive channel quality information of the multiple data streams sent by the user equipment.
  • the channel quality information includes: a channel quality parameter of the subchannel where the multiple data stream is located and/or a spatial correlation value used to indicate a spatial correlation between the multiple data streams. .
  • the method further includes the step 203, which is specifically as follows:
  • Step 203 The base station determines, according to the channel quality information, a downlink data stream sending manner.
  • the downlink data stream transmission mode of the base station includes a single data stream transmission mode and a multiple data stream transmission mode, and may also include MCS selection, transmission power, and the like of each data stream data.
  • the single data stream transmission mode refers to a method in which the transmitted data is from the same data stream, and may be a single antenna transmission or a multiple antenna transmission.
  • the single data stream data multi-antenna transmission mode may use delay diversity transmission (here, the dual antenna transmission is taken as an example, and the two antennas use the same training sequence code TSC1, only between the data of the two antennas at the time of transmission. There is a certain delay) and space/space code Transmit (two antennas use orthogonal training sequence codes TSC1, TSC2) Two different transmission methods. Multi-stream transmission means that the transmitted data comes from different data streams.
  • the base station may determine, according to the channel quality parameter of the received multiple data stream, whether the downlink data stream sending manner is a single data stream or a multiple data stream.
  • the base station receives the channel quality information of the multi-data stream reported by the user equipment, and implements the reporting of the multi-stream channel quality in the MIMO case, so that the base station can be based on the reported multi-data stream.
  • Channel quality information accurately selecting the appropriate downlink data stream transmission method in the case of MIMO.
  • FIG. 3 is a flowchart of a third embodiment of a channel quality reporting method according to the present invention.
  • the method in this embodiment is performed by a user equipment and a base station.
  • the channel quality reporting method in this embodiment includes: Step 301: Base station The indication information indicating the channel characteristics is sent to the user equipment.
  • the base station sends the indication information to the user equipment, and the user equipment determines the transmission status of the downlink data stream according to the indication information sent by the base station.
  • the transmission status of the downlink data stream is multi-data stream transmission, it indicates that data transmission is currently performed in multiple data stream transmission manners.
  • the indication information may directly include a transmission status of the downlink data stream, for example, multiple data stream transmission status information, so that the user equipment directly determines the multiple data stream transmission status information.
  • the transmission status of the downlink data stream may be included in the message content of layer 3, or may be transmitted through the highly reliable information bits of layer 1 (physical layer); or
  • the indication information does not include the transmission status information of the downlink data stream, but includes the training sequence.
  • the user equipment determines the downlink data stream transmission status according to the training sequence sent by the base station, and specifically includes: the user equipment receives the training sequence code sent by the base station. And acquiring, by the user equipment, the sending status of the downlink data stream according to the training sequence code is multi-data stream transmission.
  • the base station first sends a training sequence code to the user equipment, where the training sequence code includes all the training sequence codes that may be used by the multiple data streams. For example, the dual data stream situation requires two training sequence codes.
  • Step 302 The user equipment receives the sent indication information, and determines a sending status of the downlink data stream according to the sent indication information.
  • the user equipment directly determines the data stream transmission status according to the indication information; if the indication information received by the user equipment is the training sequence code sent by the base station (ie, Training sequence), then the user equipment receives the training sequence After the column code, the data stream transmission status is obtained by blind detection of the training sequence code.
  • the indication information received by the user equipment is the transmission status of the downlink data stream
  • the user equipment directly determines the data stream transmission status according to the indication information
  • the indication information received by the user equipment is the training sequence code sent by the base station (ie, Training sequence)
  • the user equipment receives the training sequence After the column code
  • the data stream transmission status is obtained by blind detection of the training sequence code.
  • Step 303 Acquire channel quality information of the multiple data stream when the sending status of the downlink data stream is multiple data stream transmission.
  • the channel quality information includes: a channel quality parameter of a subchannel in which the multiple data stream is located and/or a spatial correlation value used to represent a spatial correlation between the multiple data streams.
  • the throughput can be maximized by accurately selecting the appropriate data transmission method in the case of ⁇ , and the selection of the data transmission method is related to the spatial correlation value between the multiple data streams, so in order to maximize the throughput, the user needs to be
  • the channel quality information acquired by the device includes spatial correlation values between the multiple data streams.
  • the spatial correlation value is a quantized value of a channel correlation of a subchannel in which the multiple data stream is located, or a recommended value of a downlink data stream transmission manner.
  • the spatial correlation values of the dual data streams can be obtained by the following steps:
  • Step 1 Estimate the wireless channel environment under the ⁇ system to obtain a channel matrix ⁇ .
  • the channel estimation method is as follows.
  • FIG. 4A and FIG. 4B are schematic structural diagrams of a channel model of the fourth embodiment of the channel quality method according to the present invention, wherein FIG. 4A is a single-input single-out-put; Hereinafter referred to as: SISO) Schematic diagram of the system channel model, and FIG. 4B is a schematic diagram of the structure of the MIMO system channel model.
  • SISO Signal-to-SIG
  • BTS Base Transceiver Station
  • MS mobile station
  • X and Y respectively represent the transmission data of the BTS and the reception data of the MS
  • h represents the channel factor
  • TSC1 represents the training sequence code
  • FIG. 4B in the 2-input 2-output (2x2) MIMO system, between the BTS and the MS ⁇ Two-antenna dual data stream transmission mode, where XI, X2, Yl, ⁇ 2 respectively represent the transmission data on the two antennas of the BTS and the reception data on the two antennas of the MS, and hl l, hl2, h21 and h22 represent the channel factors, TSC1 and TSC2 represent training sequence codes.
  • the training sequence portion of the above equation can be written as a matrix with the SISO principle:
  • the rank of the channel matrix H obtained in the step 2 can be applied to the recommended value of the subsequent acquisition manner of the downlink data stream, and the correlation matrix R obtained in the step 2 needs to continue to perform steps 3 to 5.
  • Step 3 Calculate the eigenvalues of the correlation matrix R.
  • the eigenvalues of the relevant matrix R can be calculated by using the Jacobi method, the Cholesky decomposition method, the QR decomposition method, and the like.
  • Step 4 Calculate the difference of the eigenvalues of the correlation matrix R.
  • the difference value of the eigenvalues of the correlation matrix R or its equivalent change value may be calculated, where the equivalent transformation value may be a value obtained by performing some unified transformation on the eigenvalue, and then the difference is obtained, for example, Find the logarithm of each feature value and then find the difference; or first find the difference and then perform other transformations. For the sake of simplicity, they are collectively referred to as eigenvalue difference values.
  • Step 5 Find a channel correlation value by using the eigenvalue difference of the correlation matrix R.
  • the spatial correlation value of the channel is divided into a limited number of specific values as needed.
  • the number of specific values may be selected according to the channel correlation accuracy requirement.
  • the channel space is selected.
  • the statistical value of the eigenvalue difference of the channel correlation matrix under each correlation is determined by channel model simulation, and the difference threshold is set.
  • FIG. 5 is a schematic diagram of spatial correlation values and difference thresholds of Embodiment 5 of the channel quality reporting method according to the present invention. As shown in FIG.
  • the correlation value when the difference value of the channel correlation matrix is smaller than the difference threshold T1, the correlation value is 0; when the eigenvalue difference of the channel correlation matrix is greater than or equal to the difference threshold T1 and less than the difference threshold T2, the correlation value is 0.3; when the eigenvalue difference of the channel correlation matrix is greater than or equal to the difference threshold T2 and less than the difference When the threshold is T3, the correlation value is 0.6; when the eigenvalue difference of the channel correlation matrix is greater than or equal to the difference threshold T3 and less than the difference threshold T4, the correlation value is 0.9; when the eigenvalue difference of the channel correlation matrix is greater than or equal to When the difference threshold is T4, the correlation value is 1. Therefore, in this embodiment, for the values obtained in steps 1 to 5, there are:
  • the channel correlation is quantized, if the selection is limited
  • the several data bits represent the quantized value of the channel correlation, so that the base station determines the transmission mode according to the quantized value of the channel correlation, as shown in the following table, for the spatial correlation value of the fifth embodiment shown in FIG. 5, three can be used.
  • the bits represent quantized values of channel correlation.
  • the method further includes: configuring a channel correlation matrix of the subchannel where the multiple data stream is located The eigenvalue difference value or the rank of the channel matrix is compared with a preset threshold to obtain a recommended value of the downlink data stream transmission mode.
  • the obtaining of the recommended value of the downlink data stream transmission manner includes two modes.
  • Manner 1 Corresponding to the current channel correlation value obtained in the foregoing step 5, the user equipment combines the SNR thresholds of the correlation values, such as SNR1 and SNR2, according to the channel correlation value, and performs the judgment of the single stream and the dual stream transmission, and obtains the downlink data stream transmission.
  • Suggested value of the mode Method 2: Corresponding to the rank of the channel matrix H obtained in the above step 2, the user equipment performs the judgment of the single stream and the dual stream transmission recommendation according to the average value of the rank of the channel matrix, and obtains the downlink data flow.
  • the recommended value for the delivery method Corresponding to the current channel correlation value obtained in the foregoing step 5, the user equipment combines the SNR thresholds of the correlation values, such as SNR1 and SNR2, according to the channel correlation value, and performs the judgment of the single stream and the dual stream transmission, and obtains the downlink data stream transmission.
  • Method 2 Correspond
  • two data streams are transmitted in parallel in one physical channel as an example.
  • the user equipment combines the SNR thresholds of the correlation values according to the channel correlation values, such as SNR1 and SNR2, to perform the judgment of the single stream and the dual stream transmission, and obtain the recommended value of the downlink data stream transmission mode.
  • the preset thresholds SNR1 and SNR2 are the throughputs in the single-stream and dual-stream transmission modes under different channel correlations under a certain channel model. The simulation is pre-calculated to obtain.
  • Figure 6 is a channel quality of the present invention
  • the corresponding SNR threshold is selected according to the channel correlation value obtained in step 5 of step 303.
  • the SNR2 is selected as the threshold, and the actual measured SNR is obtained.
  • the value is compared to the preset threshold SNR2.
  • the specific comparison and decision method is: When the comparison result is SNR ⁇ SNR2, the throughput of the single data stream transmission is greater than the throughput of the double data stream transmission. Therefore, the user equipment decision result is the recommended single data stream transmission mode, so that Maximize throughput; When the comparison result is SNR>SNR2, the throughput of single data stream transmission is smaller than the throughput of double data stream transmission. Therefore, the user equipment decision result is recommended to use dual data stream transmission mode to maximize throughput.
  • the throughput of the single data stream transmission is equal to the throughput of the dual data stream transmission. Therefore, the user equipment decision result can be sent for the recommended single data stream, or can be recommended. Double data stream is sent.
  • the channel matrix and the eigenvalue difference proposed in this embodiment are all statistics in a certain period of time. ⁇
  • the channel correlation matrix has 100 eigenvalue differences, and the eigenvalues are compared with the preset threshold. The difference is the average of the 100 differences.
  • the single stream and the dual stream transmission suggestion are judged, and the recommended value of the downlink data stream transmission mode is obtained.
  • the rank of the channel matrix is also certain.
  • the statistical value in time is a series of statistical averages of 1 and 2 in the case of dual stream transmission.
  • the intermediate value of 1 and 2 can be taken as the threshold, and the statistical result is compared with the threshold.
  • Streaming, greater than or equal to 1.5 indicates that dual stream transmission is recommended.
  • Step 304 The user equipment sends the channel quality information to the base station.
  • the channel quality information includes spatial correlation values of the measured spatial correlations with the plurality of channel quality parameters and/or the multiple data streams of the subchannel in which the multiple data streams are located.
  • the user equipment directly directly obtains the plurality of channel quality parameters and the step obtained in step 5 of step 303.
  • the channel correlation value is converted into a channel correlation quantized value data bit, that is, the spatial correlation value of the channel is sent to the base station, and the base station determines the single stream or the dual stream transmission manner according to the channel quality parameter and the spatial correlation value of the channel.
  • the user equipment may select the mode 1 or mode 2 to obtain the recommended value of the downlink data stream sending mode, and The plurality of channel quality parameters and the recommended value of the downlink data stream transmission mode are sent to the base station, and the base station determines the single stream or dual stream transmission mode according to the channel quality parameter and the recommended value of the downlink data stream transmission mode.
  • the sending the channel quality information to the base station in the embodiment is specifically: sending the channel quality information to a downlink packet acknowledgement/non-acknowledgement message to the base station.
  • the downlink packet acknowledgement/non-acknowledgement message includes: a plurality of newly added channel cells for carrying channel quality parameters of the subchannel in which the plurality of data streams are located, and a newly added related cell for carrying the spatial correlation value or
  • a plurality of channel cells for carrying channel quality parameters of the subchannel in which the multiple data streams are located, and associated cells for carrying the spatial correlation value;
  • one of the plurality of channel cells is a channel quality report cell in the downlink packet acknowledgement/non-acknowledgement message, configured to carry one of channel quality parameters of a subchannel in which the multiple data stream is located;
  • a channel cell and a channel cell other than the channel quality report cell The associated cell is newly added in the downlink packet acknowledgment/non-acknowledgement message.
  • the channel quality information may be respectively carried in the General Packet Radio Service (hereinafter referred to as GPRS) downlink packet acknowledgement according to different data services.
  • GPRS General Packet Radio Service
  • EGPRS Enhanced Data Rate for GSM Evolution
  • EGPRS Packet Downlink Ack/Nack Enhanced Data Rate for GSM Evolution
  • EGPRS2 enhanced Data Rate for GSM Evolution 2
  • EGPRS2 enhanced data rate GSM Evolution Data Rate for GSM Evolution 2
  • EGPRS2 Downlink Packet Acknowledgment/Non-Confirmation
  • EGPRS Packet Downlink Ack/Nack Type 2 EGPRS Downlink Packet Acknowledgment/Non-acknowledgment
  • EGPRS Packet Downlink Ack/Nack the EGPRS downlink packet acknowledgment/non-confirm message structure is shown below: ⁇ EGPRS
  • the "EGPRS Channel Quality Report” in the fourth line of the message structure indicates the cell carrying the EGPRS channel quality report in the single channel mode
  • the "Stream 1 Quality Report” in the eleventh line of the message structure "Channel cell representing the channel quality report of data stream 1 in MIMO mode
  • "Stream 2 Quality Report” of the twelfth line indicating the channel cell carrying the channel quality report of data stream 2 in MIMO mode
  • line 13 The "Stream Correlation Report” represents a related cell carrying the spatial correlation value of data stream 1 and data stream 2 in the MIMO mode.
  • the base station receives the channel quality information sent by the user equipment, specifically: receiving a downlink packet acknowledgement/non-acknowledgment message sent by the user equipment, where the downlink packet acknowledgement/non-acknowledgement message carries the channel quality information.
  • the base station receives an EGPRS downlink packet acknowledgement/non-acknowledgement message sent by the user equipment, and the EGPRS downlink packet acknowledgement/non-acknowledgement message carries the channel quality information.
  • the default "EGPRS Channel Quality Report" in the message structure may also carry the channel quality report indicating the single channel transmission, or the multiple data stream indicating the MIMO mode.
  • the downlink packet acknowledgement/non-acknowledgement message includes: a plurality of channel cells respectively for carrying channel quality parameters of the subchannel in which the multiple data streams are located, and related cells for carrying the spatial correlation value;
  • One of the plurality of data stream channel cells is a channel quality report cell in the downlink packet acknowledgement/non-acknowledgement message, configured to carry one of channel quality parameters of the subchannel in which the multiple data stream is located; Channel cells outside the channel quality report cell and the associated cells are in the downlink packet acknowledgement/non-acknowledgement New in the interest rate.
  • EGPRS Packet Downlink Ack/Nack EGPRS Packet Downlink Ack/Nack
  • the "EGPRS Channel Quality Report” in the fourth line of the message structure can represent the cell carrying the EGPRS channel quality report in the single channel mode, and can also represent the channel signal carrying the channel quality report of the data stream 1 in the MIMO mode.
  • the "Stream 2 Quality Report” in the eleventh line of the message structure indicates the channel cell carrying the channel quality report of the data stream 2 in the MIMO mode
  • the "Stream Correlation Report” in the twelfth line indicates the data in the MIMO mode.
  • the "EGPRS Channel Quality Report" in the fourth line of the message structure may also represent the channel cell carrying the channel quality report of the data stream 2 in the MIMO mode, then the "Stream 2" in the eleventh line of the message structure
  • the Quality Report represents the channel cell of the channel quality report of the data stream 1 in the MIMO mode.
  • the base station receives the channel quality information sent by the user equipment, specifically: receiving a downlink packet acknowledgement/non-acknowledgment message sent by the user equipment, where the downlink packet acknowledgement/non-acknowledgement message carries the channel quality information.
  • the base station receives an EGPRS downlink packet acknowledgement/non-acknowledgement message sent by the user equipment, and the EGPRS downlink packet acknowledgement/non-acknowledgement message carries the channel quality information.
  • the user equipment determines the sending status of the downlink data stream included in the physical channel by receiving the indication information sent by the base station, and when the sending status of the downlink data stream is multiple data stream transmission, Obtaining a channel quality parameter and a spatial correlation value corresponding to the multi-stream, and comparing the spatial correlation value with a preset threshold, the base station selects an appropriate transmission mode according to the comparison result and the channel quality parameter, and implements Majority in the case of MIMO According to the reporting of the quality of the stream channel, the base station can accurately select an appropriate data transmission mode in the MIMO case according to the channel quality information of the reported multi-stream, thereby maximizing the throughput.
  • FIG. 7 is a schematic structural diagram of a channel quality information storage space according to Embodiment 7 of the method for reporting channel quality according to the present invention.
  • the dual-stream transmission is used as an example, and channel quality information is stored on the user equipment side before being sent to the base station side, and is stored.
  • the space includes a data stream-measurement value storage space, a data stream two measurement value storage space, and a multi-stream stream channel spatial correlation value storage space.
  • the channel quality parameter and the spatial correlation value are respectively placed in corresponding storage spaces.
  • the embodiment of the present invention is also applicable to a case where more than two data streams are included in one physical channel.
  • FIG. 8 is a schematic structural diagram of Embodiment 8 of the user equipment according to the present invention.
  • the user equipment in this embodiment includes a determining module 11, an obtaining module 12, and a sending module 13.
  • the determining module 11 is configured to determine a sending status of the downlink data stream according to the indication information sent by the base station for indicating a channel characteristic.
  • the obtaining module 12 is configured to obtain channel quality information of the multiple data stream when the sending status of the downlink data stream is multiple data stream transmission.
  • the sending module 13 is configured to send the channel quality information to the base station.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1.
  • the implementation principle and technical effects are similar, and details are not described herein again.
  • the indication information includes: a training sequence or a transmission status of a downlink data stream.
  • the channel quality information includes: a quality parameter of a subchannel in which the multiple data stream is located and/or a spatial correlation value used to represent a spatial correlation between the multiple data streams.
  • the spatial correlation value is a quantized value corresponding to a channel correlation of a subchannel in which the multiple data stream is located, or a recommended value of a downlink data stream downlink data transmission mode.
  • the sending module 13 is specifically configured to send the multiple channel quality parameters and the spatial correlation value to the base station, so that the base station determines the downlink according to the channel quality parameter and the spatial correlation value. How to send data.
  • the channel quality information includes a quality parameter of a subchannel where the multiple data stream is located and a spatial correlation value for indicating a spatial correlation between the multiple data streams;
  • the downlink packet acknowledgement/non-confirmation The message includes:
  • a plurality of channel cells for carrying channel quality parameters of the subchannel in which the multiple data streams are located, and associated cells for carrying the spatial correlation value, respectively, among the plurality of channel cells One is a channel quality report cell in the downlink packet acknowledgement/non-acknowledgement message, configured to carry one of channel quality parameters of a subchannel in which the multiple data stream is located; and a channel letter other than the channel quality report cell The element and the associated cell are added to the downlink packet acknowledgement/non-acknowledgement message.
  • Embodiment 9 is a schematic structural diagram of Embodiment 9 of a user equipment according to the present invention.
  • the apparatus of this embodiment is based on the apparatus structure shown in FIG. 8, and further includes a comparison module 14 for When the spatial correlation value is a recommended value of the downlink data stream transmission manner, before the channel quality information is sent to the base station, the eigenvalue difference value of the channel correlation matrix of the subchannel where the multiple data stream is located or The rank of the channel matrix is compared with a preset threshold to obtain a recommended value of the downlink data stream transmission mode.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 10 is a schematic structural diagram of Embodiment 10 of a base station according to the present invention. As shown in FIG. 10, the base station of this embodiment includes an information sending module 21 and a receiving module 22.
  • the information sending module 21 is configured to send, to the user equipment, indication information for indicating a channel feature, so that the user equipment determines, according to the indication information, a sending status of the downlink data stream, and the sending status of the downlink data stream is When the multi-stream is sent, the channel quality information of the multi-stream is obtained.
  • the receiving module 22 is configured to receive channel quality information of the multiple data streams sent by the user equipment.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the channel quality information includes: a quality parameter of the subchannel where the multiple data stream is located, and/or a spatial correlation between the multiple data streams. Spatial correlation value.
  • the spatial correlation value is a quantized value of a channel correlation of a subchannel in which the multiple data stream is located, or a recommended value of a downlink data stream transmission manner.
  • the receiving module is specifically configured to receive a downlink packet acknowledgement/non-acknowledgement message sent by the user equipment, where the downlink packet acknowledgement/non-confirmation message carries the channel quality information.
  • the device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 11 is a schematic structural diagram of Embodiment 11 of the system of the present invention.
  • the system of this embodiment includes a user equipment 31 and a base station 32.
  • the user equipment 31 can adopt the structure of the embodiment of the user equipment shown in FIG. 8 to 9, and the base station 32 can use the structure of the base station embodiment shown in FIG.
  • FIG. 12 is a schematic diagram showing the physical structure of an embodiment of a user equipment according to the present invention. As shown in FIG. 12, the processor 1201 and the memory 1202 are included.
  • the processor 1201 is configured to determine, according to indication information used by the base station to indicate a channel feature, a sending status of the downlink data stream, and when the sending status of the downlink data stream is a multi-data stream, acquiring the multi-data stream.
  • Channel quality information the channel quality information is sent to the base station; and the memory 1202 is configured to store channel quality information of the multiple data stream.
  • the indication information includes: a training sequence or a transmission status of a downlink data stream.
  • the channel quality information includes: a quality parameter of a subchannel in which the multiple data stream is located and/or a spatial correlation value used to represent a spatial correlation between the multiple data streams.
  • the spatial correlation value is a quantized value of a channel correlation of a subchannel in which the multiple data stream is located, or a recommended value of a downlink data stream transmission manner.
  • the processor 1201 is further configured to: when the spatial correlation value is a recommended value of the downlink data stream transmission manner, before transmitting the channel quality information to the base station, The eigenvalue difference of the channel correlation matrix of the subchannel in which the data stream is located or the rank of the channel matrix is compared with a preset threshold to obtain a recommended value of the downlink data stream transmission mode.
  • the processor 1201 is further configured to send the channel quality information to a downlink packet acknowledgement/non-acknowledgement message to the base station.
  • the downlink packet acknowledgement/non-confirmation The message includes:
  • One is a channel quality report cell in the downlink packet acknowledgement/non-acknowledgement message, configured to carry one of channel quality parameters of a subchannel in which the multiple data stream is located; and a channel letter other than the channel quality report cell
  • the element and the associated cell are added to the downlink packet acknowledgement/non-acknowledgement message.
  • FIG. 13 is a schematic structural diagram of an entity of a base station according to an embodiment of the present invention. As shown in FIG. 13, the processor 1301 and the memory 1302 are included.
  • the processor 1301 is configured to send, to the user equipment, indication information for indicating a channel feature, so that the user equipment determines, according to the indication information, a sending status of the downlink data stream, and the sending status of the downlink data stream is Obtaining channel quality information of the multiple data stream when the data stream is sent; receiving channel quality information of the multiple data stream sent by the user equipment;
  • the memory 1302 is configured to store channel quality information of the multiple data stream.
  • the channel quality information includes: a quality parameter of a subchannel in which the multiple data stream is located and/or a spatial correlation value used to represent a spatial correlation between the multiple data streams.
  • the spatial correlation value is a quantized value of a channel correlation of a subchannel in which the multiple data stream is located, or a recommended value of a downlink data stream transmission manner.
  • the processor 1301 is specifically configured to receive a downlink packet acknowledgment/non-acknowledgement message sent by the user equipment, where the downlink packet acknowledgment/non-acknowledgement message carries the channel quality information.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention concernent un procédé, un dispositif et un système de création de rapport de qualité de voie. Le procédé consiste : à déterminer un état de transmission d'un flux de données en liaison descendante sur la base d'informations d'indication qui sont envoyées par une station de base pour indiquer une caractéristique de voie; et, quand l'état de transmission du flux de données en liaison descendante indique qu'une pluralité de flux de données est envoyée, à acquérir des informations de qualité de voie de la pluralité de flux de données et à transmettre les informations de qualité de voie à la station de base. Dans le procédé, le dispositif et le système de création de rapport de qualité de voie selon les modes de réalisation de la présente invention, des informations de voie transmises par une station de base sont reçues et un état de transmission d'un flux de données en liaison descendante d'un canal physique est déterminé; des informations de qualité de voie correspondant à la pluralité de flux de données sont acquises quand la pluralité de flux de données est transmise et les informations de qualité de voie sont rapportées à la station de base. De cette manière, dans le cas d'une transmission MIMO, sur la base des informations de qualité de voie de la pluralité de flux de données rapportée, la station de base peut sélectionner précisément un procédé adapté de transmission de flux de données en liaison descendante.
PCT/CN2012/087428 2012-12-25 2012-12-25 Procédé, dispositif et système de création de rapport de qualité de voie Ceased WO2014100975A1 (fr)

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CN201280002511.6A CN104041105A (zh) 2012-12-25 2012-12-25 信道质量上报方法、装置和系统

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KR20110081753A (ko) * 2010-01-08 2011-07-14 삼성전자주식회사 다중 안테나 시스템에서 채널품질정보의 피드백 방법 및 장치

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