WO2013040924A1 - 反馈信道信息矩阵维数的通知方法及装置 - Google Patents

反馈信道信息矩阵维数的通知方法及装置 Download PDF

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Publication number
WO2013040924A1
WO2013040924A1 PCT/CN2012/077741 CN2012077741W WO2013040924A1 WO 2013040924 A1 WO2013040924 A1 WO 2013040924A1 CN 2012077741 W CN2012077741 W CN 2012077741W WO 2013040924 A1 WO2013040924 A1 WO 2013040924A1
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Prior art keywords
channel information
information matrix
rows
receiver
frame
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PCT/CN2012/077741
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English (en)
French (fr)
Inventor
姜静
吕开颖
孙波
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中兴通讯股份有限公司
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Publication of WO2013040924A1 publication Critical patent/WO2013040924A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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

Definitions

  • the present invention relates to a notification technique for feeding back the dimensionality of a channel information matrix, and more particularly to a method and apparatus for notifying a dimension of a feedback channel information matrix.
  • Wireless Local Area Networks is a network system that uses wireless communication technology to interconnect computer devices to form a network that can communicate with each other and share resources.
  • the essence of WLAN is that the communication cable is no longer used to connect the computer to the network, but is connected wirelessly, which makes the construction of the network and the movement of the terminal more flexible.
  • the 802.11-related protocol proposed by the IEEE for Institute for Electrical and Electronic Engineers is one of the mainstream technologies for wireless LANs. This protocol mainly specifies the physical layer (PHY) and media access control (MAC, Media). Access Control) layer specification.
  • FIG. 1 is a schematic diagram of an IEEE 802.11ac channel measurement frame or channel measurement request frame exchange process. As shown in FIG. 1, the current IEEE 802.il ac specification specifies that when a receiving end needs to feed back channel information to a transmitting end, the transmitting end will send channel information.
  • Measurement Request (NDPA) Frame and Channel Information Measurement NDPA
  • NDP NDP frame
  • STA STA information field
  • 2 is a schematic diagram of an NDP physical layer structure already proposed in IEEE 802.1 lac. As shown in FIG. 2, the frame format of the NDP in the present discussion is shown, and the TXVECTOR value of the NDP is defined as: - LENGTH (data length) Set to 0.
  • ⁇ NUMJJSERS is set to 1.
  • the GROUP ID is set to 63 (all 1).
  • ⁇ CH_BANDWIDTH is set to the same value as NDPA's TXVECTOR CH_BANDWIDTH.
  • the Nst space-time stream number Nsts cannot be greater than the minimum value that all users can support the maximum number of antennas.
  • the beamforming (Beamformer) supported by the user 1 has a maximum number of transmitting antennas of 2, which is supported by the user 1.
  • the maximum number of transmit antennas of Beamformer is 4, that is, the minimum value of the maximum number of antennas supported by User 1 and User 2 is 2.
  • the feedback channel information needs to feed back the transmit antenna and the number of supported layers, but User 1 and User 2 do not know all users.
  • a method for notifying a dimension of a feedback channel information matrix includes:
  • the sender notifies the receiver of the dimension of the channel information matrix in an implicit manner and/or display manner.
  • the dimension of the channel information matrix is the number of rows of the channel information matrix or the number of rows and columns of the channel information matrix.
  • the sender notifies the receiver by the channel measurement NDP frame or the channel measurement request NDPA frame in an implicit manner and/or a display manner to feed back the number of rows or the number of rows and the number of columns of the channel information matrix.
  • the sender notifies the receiver through the NDP frame or the NDPA frame to implicitly report the number of rows or the number of rows and columns of the channel information matrix, which is:
  • the NDP frame or the NDPA frame sent by the sender to the receiver does not include the number of rows or the number of rows and the number of columns indicating information that the receiver should feed back the channel information matrix.
  • the method further includes:
  • the number of rows that the channel information matrix is fed back to the sender is the maximum number of transmit antennas that can be supported in the feedback channel information matrix of the receiver or the actual used transmission. Number of antennas.
  • the method further includes:
  • the receiver After receiving the NDP frame or the NDPA frame, the receiver feeds back the number of rows of the channel information matrix to the sender as the number of space-time streams in the currently received NDP frame or NDPA frame.
  • the number of rows or the number of rows and columns of the feedback channel information matrix are:
  • the NDP frame or the NDPA frame sent by the sender to the receiver includes the number of rows or the number of rows and the number of column indication information that the receiver should feed back the channel information matrix.
  • the number of rows indicating that the receiver should feed back the channel information matrix is carried in the pilot of the NDP frame.
  • the row number indication information that the receiver should feed back the channel information matrix is carried by the cell bit in the VHT-SIG-A of the NDP frame.
  • the receiver indicates that the line number indication information of the feedback channel information matrix is carried in the NDPA frame.
  • the receiver shall feed back the channel information matrix with the number of rows indicating information carried in the NDPA
  • the user information field in the frame is in the STA Info Field.
  • the row indication information that the receiver should feed back the channel information matrix is carried in the STA Info Field in the NDPA frame, which is:
  • the cell carrying the associated identity information AID, the cell carrying the feedback type information Feedback Type, the number of rows of the channel information matrix, and the number of columns of the channel information matrix are respectively set in the STA Info Field in the NDPA frame.
  • the method further includes: the receiver After receiving the NDP frame or the NDPA frame, the number of columns that feed back the channel information matrix to the sender is the number of space-time streams in the currently received NDP frame or NDPA frame.
  • a notification device for feeding back a dimension of a channel information matrix comprising:
  • a notification unit located in the sender, for notifying the receiver of the dimension of the channel information matrix in an implicit manner and/or a display manner; wherein the dimension of the channel information matrix is the number of rows or channels of the channel information matrix The number of rows and columns of the information matrix.
  • the notifying unit is further configured to notify, by using an NDP frame or an NDPA frame, the number of rows or the number of rows and columns of the channel information matrix to be fed back in an implicit manner and/or a display manner.
  • the notification unit notifies the NDP frame or the NDPA frame of the receiver that the indication information of the number of rows or the number of rows and the number of columns that the receiver should feed back the channel information matrix is not included.
  • the device further includes:
  • a feedback unit configured to: after the receiving party receives the NDP frame or the NDPA frame, the number of rows of the channel information matrix that is fed back to the sender is the maximum number of transmitting antennas that the receiver can support or actually used. The number of transmit antennas.
  • the device further includes:
  • a feedback unit configured to: after the receiving party receives the NDP frame or the NDPA frame, feed back, by the sender, the number of rows of the channel information matrix to be currently received in the NDP frame or the NDPA frame The number of empty time streams.
  • the notification unit notifies the NDP frame or the NDPA frame of the receiver that the indication information of the number of rows or the number of rows and the number of columns that the receiver should feed back the channel information matrix.
  • the device further includes:
  • the bearer unit is configured to carry the indication information of the number of rows or the number of rows and the number of columns that the receiver should feed back the channel information matrix into the pilot of the NDP frame.
  • the bearer unit uses the VHT-SIG-A cell of the NDP frame and/or the reserved bit to carry the indication information of the number of rows or the number of rows and the number of columns of the feedback channel information matrix.
  • the device further includes:
  • the bearer unit is configured to carry the indication information of the number of rows or the number of rows and the number of columns that the receiver should feed back the channel information matrix to the STA Info Field in the NDPA frame.
  • the device further includes:
  • the setting unit sets, in the STA Info Field in the NDPA frame, a cell carrying the associated identity identification information AID, a cell carrying the feedback type information Feedback Type, a cell carrying the number of rows of the feedback channel information matrix, and bearer channel information. a cell of the number of columns of the matrix;
  • the bearer unit correspondingly carries the acquired corresponding information in the corresponding cells.
  • the notification unit notifies the receiving party that the NDP frame or the NDPA frame includes the indication of the number of rows or the number of rows and the number of columns of the channel information matrix, the apparatus further includes:
  • a feedback unit configured to: after the receiving party receives the NDP frame or the NDPA frame, feed back, by the sender, the number of columns of the channel information matrix to the number of space-time flows in the currently received NDP frame or NDPA frame .
  • the beamforming sender notifies the receiver of the dimension of the channel information matrix to be fed back in an implicit or display manner.
  • the channel measurement frame or the channel measurement request frame sent by the sender to the receiver may carry the indication information of the dimension of the channel information matrix that the receiver should feed back, and receive The channel performs channel information matrix dimension feedback according to the sender's indication information.
  • the channel measurement frame or the channel measurement request frame sent by the sender to the receiver does not carry the indication information that the receiver should feed back the dimension of the channel information matrix, send the feedback channel information matrix to the sender in an agreed manner.
  • Dimension such as the number of rows that feed back the channel information matrix to the sender is the maximum number of transmit antennas that the receiver can support or the number of transmit antennas actually used, or the number of columns that feed back the channel information matrix to the sender is currently received.
  • the invention realizes the notification that the receiver should feed back the dimension of the channel information matrix in a simple manner, so that the sender supports the transmission of the MU-MIMO data according to the received feedback transmission antenna number.
  • FIG. 1 is a schematic diagram of an IEEE 802.11ac channel measurement frame or channel measurement request frame exchange process
  • FIG. 2 is a schematic diagram of an NDP physical layer structure already proposed in IEEE 802.1 lac
  • FIG. 3 is a schematic diagram of a feedback information notification signaling structure of an NDPA according to the present invention
  • FIG. 4 is another schematic structural diagram of feedback information notification signaling of the NDPA according to the present invention
  • FIG. 5 is another schematic structural diagram of feedback information notification signaling of the NDPA according to the present invention
  • the beamforming sender notifies the receiver in an implicit or display manner of the dimension of the feedback channel information matrix.
  • the channel measurement frame or the channel measurement request frame sent by the sender to the receiver may carry the indication information of the dimension of the channel information matrix that the receiver should feed back, and the receiver performs the channel information matrix dimension according to the indication information of the sender. Feedback.
  • the channel measurement frame or the channel measurement request frame sent by the sender to the receiver does not carry the indication information that the receiver should feed back the dimension of the channel information matrix, send the feedback channel information matrix to the sender in an agreed manner.
  • Dimension such as the number of rows that feed back the channel information matrix to the sender is the maximum number of transmit antennas that the receiver can support or the number of transmit antennas actually used, or feed back the channel to the sender.
  • the number of columns of the information matrix is the number of space-time streams in the currently received channel measurement frame or channel measurement request frame.
  • This example is an example of notifying the receiver of the dimensions of the feedback channel information matrix in an implicit manner.
  • the NDPA and NDP sent by the sender to the receiver do not include indication information indicating the dimension of the channel information matrix that the receiver should feed back.
  • the dimension of the channel information matrix is fed back in a default manner.
  • the default mode is that the number of antennas in the multi-antenna information fed back by the beamforming receiver, that is, the number of rows (Nr) of the channel information matrix, is equal to the maximum number of transmitting antennas or currents that can be supported when the user feeds back the channel information matrix. The number of transmit antennas actually used.
  • the maximum number of transmit antennas supported by user 1 is 2, and the maximum number of transmit antennas supported by user 2 is 4, and the number of transmit antennas of user 1 and user 2 feedback channel matrices is 2 and respectively. 4.
  • This example is an example of an explicit way to inform the receiver that the dimensions of the channel information matrix should be fed back.
  • the NDPA and the NDP sent by the sender to the receiver carry indication information indicating the dimension of the channel information matrix that the receiver should feed back.
  • the number of rows in the multi-antenna information fed back by the beamforming receiver is the number of rows of the channel information matrix (Nr), and the specific notification mode is:
  • the physical layer structure of NDP is shown in Figure 2.
  • the information of the VHT-SIG-A notification of the NDP includes the number of antennas that the STA should feed back, that is, the number of rows (Nr) of the channel information matrix, and the ratio is adopted.
  • B0-B2 because the bandwidth of the NDP is the same as the NDPA, the bandwidth representative bits B0-B1 in the NDP (the NDPA frame can also indicate the same bandwidth information) and the reserved bit B2 can be combined to indicate the transmit antenna supported by the feedback.
  • the number is the number of rows (Nr) of the channel information matrix.
  • the information notified by the VHT-SIG-A of the NDP includes the number of antennas that the STA should feed back, using the bits B0-B2. Since the bandwidth of the NDP is the same as the NDPA, the bandwidth can represent the bits B0-B1 and the reserved bits B2. B3 and B23 are combined to indicate the transmit antenna information that should be supported by the feedback.
  • the specific information of the number of antennas to be fed back by the STA is as follows.
  • the three-bit indication information indicates that the number of antennas that the STA should feed back is an example.
  • the value of the three-bit indication information is 0, indicating that Nr is limited to 1 antenna, and the value 1 indicates Nr. It is limited to 2 antennas.
  • a value of 2 indicates that Nr is limited to 3 antennas.
  • a value of 3 indicates that Nr is limited to 4 antennas.
  • a value of 4 indicates that Nr is limited to 5 antennas.
  • a value of 5 indicates that Nr is limited to 6 antennas.
  • a value of 6 indicates that Nr is limited to 7 antennas, and a value of 7 indicates that Nr is limited to 8 antennas.
  • This example is an example of an explicit way to inform the receiver that the dimensions of the channel information matrix should be fed back.
  • the NDPA and the NDP sent by the sender to the receiver carry indication information indicating the dimension of the channel information matrix that the receiver should feed back.
  • the beamforming sender notifies the dimension of the channel information matrix to be fed back, and the number of rows (Nr) of the channel information matrix fed back by the beamforming receiver is as follows:
  • the STA Info Field in NDPA shall contain the AID (Associated Identity), the Feedback Type, and the required number of the antenna Nc (the number of columns of the channel information matrix) and Nr (the number of antennas). That is, the number of rows of the channel information matrix) is specifically shown in FIG. 3 or FIG. 4.
  • the number of bits used is: AID is 9 bits, feedback type is 1 bit, the dimension of the feedback channel information matrix Nc uses 3 bits, and the dimension Nr of the feedback channel information matrix uses 3 bits.
  • the AID is 12 bits
  • the feedback type is 1 bit
  • the dimension of the feedback channel information matrix Nc uses 3 bits
  • the dimension Nr of the feedback channel information matrix uses 3 bits.
  • the AID is 12 bits
  • the feedback type is 1 bit
  • Nc uses 3 bits, and the dimension Nr of the feedback channel information matrix is indicated by a difference from the transmitting antenna ⁇ , which is 2 bits.
  • the STA Info Field in NDPA shall contain the AID (Associated Identity), the Feedback Type, the dimension of the channel information matrix that is required to be fed back, Nc and
  • Nr as shown in Figure 3 or 4.
  • the number of bits used is: AID is 9 bits, feedback type uses 1 bit, and the dimension of the feedback channel information matrix Nc uses 4 bits, and the dimension of the feedback channel information matrix is used.
  • Nr uses 3 bits.
  • the AID is 12 bits
  • the feedback type is 1 bit
  • the dimension Nr of the feedback channel information matrix uses 3 bits
  • the dimension Nc of the feedback channel information matrix uses 3 bits.
  • the AID is 12 bits
  • the feedback type is 1 bit
  • the dimension Nr of the feedback channel information matrix is different from the transmission antenna ⁇
  • 2 bits are used
  • the dimension Nc of the feedback channel information matrix is 3 bits.
  • the dimension Nr of the channel information matrix that is required to be fed back is specifically as follows.
  • the three-bit indication information indicating the number of antennas that the STA should feed back is used as an example.
  • the value of the three-bit indication information is 0, indicating that Nr is limited to 1 antenna, and the value is 1
  • a value of 6 indicates that Nr is limited to 7 antennas, and a value of 7 indicates that Nr is limited to 8 antennas.
  • Nr of the feedback channel information matrix When the number of rows Nr of the feedback channel information matrix is indicated by the difference from the transmitting antenna ⁇ , it is determined by Nc and the corresponding difference relationship that the beamforming receiver should feed back the dimension of the channel information matrix.
  • This example is an example of notifying the receiver of the dimensions of the feedback channel information matrix in an implicit manner.
  • the NDPA and the NDP sent by the sender to the receiver do not include indication information of the dimension of the channel information matrix that the receiver should feed back.
  • the feedback of the number of transmitting antennas is performed by default.
  • the number of transmit antennas (Nr) in the multi-antenna information fed back by the default beamforming receiver is equal to the number of space-time flows in the channel measurement frame. NstS.
  • the transmit line that should be fed back The number is set to the number of space-time streams Nsts in NDP.
  • This example is an example of notifying the receiver of the dimensions of the feedback channel information matrix in an explicit and implicit manner.
  • the NDPA and the NDP sent by the sender to the receiver carry the line number indication information of the channel information matrix that the receiver should feed back, and the number of columns of the channel information matrix is notified in an implicit manner.
  • the beamforming sender notifies the dimension of the channel information matrix to be fed back, and the number of rows (Nr) of the channel information matrix fed back by the beamforming receiver is as follows:
  • the STA Info Field in the NDPA shall contain the AID (Associated Identity), the feedback type (Feedback Type), and the required number of antennas Nr (the number of antennas, that is, the number of rows of the channel information matrix).
  • AID Associated Identity
  • Feedback Type the required number of antennas, that is, the number of rows of the channel information matrix.
  • Nr the number of antennas, that is, the number of rows of the channel information matrix.
  • Figure 5 shows.
  • the number of bits used is: AID is 9 bits, feedback type is 1 bit, and the dimension of the feedback channel information matrix Nr uses 3 bits.
  • the AID is 12 bits
  • the feedback type is 1 bit
  • the dimension Nr of the feedback channel information matrix uses 3 bits.
  • the AID is 12 bits
  • the feedback type is 1 bit
  • the dimension Nr of the feedback channel information matrix is indicated by a difference from the transmitting antenna ⁇ , which is 2 bits.
  • the NDPA and NDP sent by the sender to the receiver do not include the column number indication information that the receiver should feed back the channel information matrix.
  • the feedback of the number of channel information matrix columns is performed by default.
  • the number of columns (Nc) in the channel information matrix fed back by the default beamforming receiver is equal to the number of space-time streams Nsts in the channel measurement frame.
  • the sender sets the number of columns to be fed back to the number of space-time flows in the NDP.
  • This example is an example of notifying the receiver of the dimensions of the feedback channel information matrix in an explicit and implicit manner.
  • the NDPA and the NDP sent by the sender to the receiver carry the line number indication information of the channel information matrix that the receiver should feed back, and the number of columns of the channel information matrix is notified in an implicit manner.
  • the beamforming sender notifies the dimension of the feedback channel information matrix, and the number of transmitting antennas in the multi-antenna information fed back by the beamforming receiver is the number of rows (Nr) of the channel information matrix, and the specific notification mode is:
  • the physical layer structure of NDP is shown in Figure 2.
  • the information of the VHT-SIG-A notification of the NDP includes the number of antennas that the STA should feed back, that is, the number of rows (Nr) of the channel information matrix, and the bits B0-B2 are used. Since the bandwidth of the NDP is the same as the NDPA, the NDP can be used.
  • the bandwidth representation bit B0-B1 (the NDPA frame may also indicate the same bandwidth information) and the reserved bit B2 jointly represent the number of transmit antennas supported by the feedback, that is, the number of rows (Nr) of the channel information matrix.
  • the information notified by the VHT-SIG-A of the NDP includes the number of antennas that the STA should feed back, using the bits B0-B2. Since the bandwidth of the NDP is the same as the NDPA, the bandwidth can represent the bits B0-B1 and the reserved bits B2. B3 and B23 are combined to indicate the transmit antenna information that should be supported by the feedback.
  • the NDPA and NDP sent by the sender to the receiver do not include the column number indication information that the receiver should feed back the channel information matrix.
  • the feedback of the number of channel information matrix columns is performed by default.
  • the number of columns (Nc) in the channel information matrix fed back by the default beamforming receiver is equal to the number of space-time streams Nsts in the channel measurement frame.
  • the sender sets the number of columns to be fed back to the number of space-time streams in the NDP.
  • the present invention provides a dimension notification method for a channel information matrix, which notifies a channel information matrix dimension feedback party in an implicit and/or explicit manner to support multi-user channel information measurement, and allows Users of different capabilities feedback the channel information matrix dimension under the same channel measurement request frame, which improves the feedback quality and feedback efficiency of the channel information matrix dimension and improves system performance.
  • the present invention also describes a notification device for implementing the feedback channel information matrix dimension of the feedback channel information matrix dimension
  • FIG. 6 is a schematic structural diagram of a notification device for the feedback channel information matrix dimension of the present invention.
  • the notification device of the feedback channel information matrix dimension of the present invention includes:
  • the notification unit 60 is located in the sender, and is configured to notify the receiver in an implicit manner and/or a display manner that the dimension of the channel information matrix should be fed back; wherein the dimension of the channel information matrix is the number of rows of the channel information matrix or The number of rows and columns of the channel information matrix.
  • the notification unit 60 is further configured to notify, by the channel measurement frame or the channel measurement request frame, the number of rows or the number of rows and columns of the channel information matrix to be fed back by the receiver in an implicit manner and/or a display manner.
  • the notification unit 60 notifies the channel measurement frame or the channel measurement request frame of the receiver that the number of rows or the number of rows and the number of columns of the channel information matrix to which the receiver should feed back is not included.
  • the notification device of the feedback channel information matrix dimension of the present invention further includes:
  • the feedback unit 61 is configured to: after the receiving party receives the channel measurement frame or the channel measurement request frame, the number of rows that feed back the channel information matrix to the sender is the maximum number of transmit antennas that the receiver can support Or the number of transmit antennas actually used.
  • the feedback unit 61 is configured to: after the receiving party receives the channel measurement frame or the channel measurement request frame, feed back to the sender, the number of columns of the channel information matrix is currently received.
  • the notification unit 60 notifies the channel measurement frame or the channel measurement request frame of the receiver that the indication information of the number of rows or the number of rows and the number of columns of the channel information matrix to be fed back by the receiver is included.
  • the notification device of the feedback channel information matrix dimension of the present invention further includes:
  • the bearer unit 62 is configured to carry the indication information of the number of rows or the number of rows and the number of columns that the receiver should feed back the channel information matrix into the pilot of the NDP frame.
  • the bearer unit 62 uses the VHT-SIG-A cell of the NDP frame and/or the reserved bit to carry the indication information of the number of rows or the number of rows and the number of columns of the channel information matrix that the receiver should feed back.
  • the bearer unit 62 is configured to carry the indication information of the number of rows or the number of rows and the number of columns of the feedback channel information matrix of the receiver to the STA Info FiekL in the NDPA frame.
  • the notification device of the feedback channel information matrix dimension of the present invention further includes:
  • a setting unit (not shown in FIG. 6), a setting unit, respectively, in the STA Info Field in the NDPA frame, a cell carrying the associated identity information AID, a cell carrying a feedback type information, a feedback type, and a bearer feedback channel information a cell of the number of rows of the matrix and a cell carrying the number of columns of the channel information matrix;
  • the bearer unit correspondingly carries the acquired corresponding information in the corresponding cells. It should be understood by the prior art that, based on the indication information that the notification unit 60 notifies the receiver of the channel measurement frame or the channel measurement request frame that the receiver should feed back the channel information matrix, the feedback of the present invention is provided.
  • the notification device of the channel information matrix dimension further includes: a feedback unit 61, configured to: after the receiving party receives the NDP frame or the NDPA frame, feed back the number of columns of the channel information matrix to the sender as the currently received The number of space-time streams in an NDP frame or an NDPA frame.
  • the notification of the dimension of the feedback channel information matrix shown in FIG. The implementation functions of the processing units in the apparatus can be understood by referring to the related description of the notification method of the feedback channel information matrix dimension.
  • the functions of the units in the spectrum resource reconfiguration device shown in FIG. 6 can be implemented by a program running on a processor, or can be implemented by a specific logic circuit. It should be understood by those skilled in the art that, except for the notification unit 60 in the figure, the remaining processing units are all provided by the notification device for optimizing the dimension of the feedback channel information matrix of the present invention, and are not used to implement the feedback channel information matrix dimension of the present invention.
  • the necessary processing unit of the notification device are all provided by the notification device for optimizing the dimension of the feedback channel information matrix of the present invention, and are not used to implement the feedback channel information matrix dimension of the present invention.
  • the beamforming sender notifies the receiver of the dimension of the channel information matrix in an implicit or display manner. Therefore, the notification of the dimension of the channel information matrix to be fed back by the receiver is realized in a simple manner, so that the sender supports the transmission of the MU-MIMO data according to the number of received feedback antennas.

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Abstract

本发明公开了一种反馈信道信息矩阵维数的通知方法,包括:发送方以隐式方式和/或显示方式通知接收方应反馈的矩阵维数。本发明同时公开了一种实现上述方法的反馈信道信息矩阵维数的通知装置,所述装置包括:通知单元,位于发送方中,用于以隐式方式和/或显示方式通知接收方应反馈的矩阵维数。本发明的信道信息通知方法用以支持多个用户的信道信息测量,允许不同能力的用户在同一个信道测量请求帧下反馈信道信息矩阵维数,提高了信道信息矩阵维数的反馈质量和反馈效率,提高了系统性能。

Description

反馈信道信息矩阵维数的通知方法及装置 技术领域
本发明涉及反馈信道信息矩阵维数的通知技术, 尤其涉及一种反馈信 道信息矩阵维数的通知方法及装置。 背景技术
无线局或网络 ( WLAN, Wireless Local Area Networks )是应用无线通 信技术将计算机设备互联起来, 构成可以互相通信和实现资源共享的网络 体系。 无线局域网本质的特点是不再使用通信电缆将计算机与网络连接起 来, 而是通过无线的方式连接, 从而使网络的构建和终端的移动更加灵活。 电气和电子工程师十办会 ( IEEE , Institute for Electrical and Electronic Engineers )提出的 802.11相关协议是目前无线局域网的主流技术之一, 此 协议主要规定了物理层 (PHY ) 和媒体访问控制 (MAC , Media Access Control )层规范。 随着移动通信技术的发展以及人们对无线网络的需求的 不断提高, 物理层技术规范向着速率越来越高的方向不断发展, 经历了 802.11到 802.11b再到 802.11a/g, 然后到 802.11η, 最后到 802.11ac的发展 历程。实际的物理技术也从直接序列扩频技术发展到正交频分复用( OFDM, Orthogonal Frequency Division Multiplexing )技术, 并且在 IEEE802.11n中 引入了多天线技术, 在 IEEE 802.11ac中引入大带宽和多用户多输入多输出
( MU-MIMO, Multi-User Multiple Input Multiple Output )技术。
图 1为 IEEE 802.11ac信道测量帧或信道测量请求帧交换过程示意图, 如图 1所示, 当前 IEEE802.il ac规范规定, 当需要接收端向发送端反馈信 道信息时, 发送端将发送信道信息测量请求 (NDPA ) 帧和信道信息测量
( NDP )帧, 要求 NDPA的 STA信息域对应地址的 STA反馈信道信息。 具 体的交互细节可参见 IEEE 802.1 lac协议中的规定, 这里不再赘述其细节。 图 2为 IEEE 802.1 lac中已经提出的 NDP物理层结构示意图, 如图 2所示, 示出了 NDP在目前的讨论中的帧格式,并限定 NDP的 TXVECTOR取值为: - LENGTH (数据长度 )设定为 0。
― NUMJJSERS设定为 1。
- GROUP ID设定为 63 (全 1 )。
― NUM_STS (空时流数) 两个或者更多的空时流。
― CH_BANDWIDTH 设 定 为 和 NDPA 的 TXVECTOR CH_BANDWIDTH相同的值。
并规定 NDP的空时流数 Nsts不能大于所有用户可支持最大天线数的最 小值, 例如在 MU-MIMO情况下, 用户 1支持的波束成形 (Beamformer ) 最大发送天线数为 2, 用户 1支持的 Beamformer最大发送天线数为 4, 即 用户 1和用户 2所支持最大天线数的最小值为 2,反馈信道信息需要反馈发 送天线和所支持的层数, 但是用户 1和用户 2并不知道所有用户可支持的 最小天线数, 需要明确此种场景下用户反馈信道信息时 Nr如何确定, 用以 支持 MU-MIMO反馈和 MIMO处理。 发明内容
有鉴于此, 本发明的主要目的在于提供一种反馈信道信息矩阵维数的 通知方法及装置, 能通知波束成形接收方应反馈的信道信息矩阵维数。
为达到上述目的, 本发明的技术方案是这样实现的:
一种反馈信道信息矩阵维数的通知方法, 包括:
发送方以隐式方式和 /或显示方式通知接收方反馈信道信息矩阵的维 数。
优选地, 所述信道信息矩阵的维数为信道信息矩阵的行数或者信道信 息矩阵的行数及列数。 优选地,所述发送方通过信道测量 NDP帧或信道测量请求 NDPA帧以 隐式方式和 /或显示方式通知接收方应反馈信道信息矩阵的行数或者行数及 列数。
优选地,所述发送方通过 NDP帧或 NDPA帧以隐式方式通知接收方应 反馈信道信息矩阵的行数或者行数及列数, 为:
所述发送方发送给所述接收方的 NDP帧或 NDPA帧中不包含所述接收 方应反馈信道信息矩阵的行数或者行数及列数指示信息。
优选地, 所述方法还包括:
所述接收方接收到所述 NDP帧或 NDPA帧后, 向所述发送方反馈信道 信息矩阵的行数为所述接收方反馈信道信息矩阵中所能支持的最大发送天 线数或实际使用的发送天线数。
优选地, 所述方法还包括:
所述接收方接收到所述 NDP帧或 NDPA帧后, 向所述发送方反馈信道 信息矩阵的行数为当前所接收所述 NDP帧或 NDPA帧中的空时流数。 反馈信道信息矩阵的行数或者行数及列数, 为:
所述发送方发送给所述接收方的 NDP帧或 NDPA帧中包含所述接收方 应反馈信道信息矩阵的行数或者行数及列数指示信息。
优选地, 所述接收方应反馈信道信息矩阵的行数指示信息承载于 NDP 帧的导频中。
优选地, 所述接收方应反馈信道信息矩阵的行数指示信息由 NDP帧的 VHT-SIG-A中的信元比特承载。
优选地,所述接收方应反馈信道信息矩阵的行数指示信息承载于 NDPA 帧中。
优选地,所述接收方应反馈信道信息矩阵的行数指示信息承载于 NDPA 帧中的用户信息域 STA Info Field中。
优选地, 所述接收方应反馈信道信息矩阵的行指示信息承载于 NDPA 帧中的 STA Info Field中, 为:
在 NDPA帧中的 STA Info Field中分别设置承载关联身份标识信息 AID 的信元、 承载反馈类型信息 Feedback Type的信元、 信道信息矩阵的行数和 信道信息矩阵的列数。
所述发送方发送给所述接收方的 NDP帧或 NDPA帧中包含所述接收方 应反馈信道信息矩阵的行数或者行数及列数指示信息时, 所述方法还包括: 所述接收方接收到所述 NDP帧或 NDPA帧后, 向所述发送方反馈信道 信息矩阵的列数为当前所接收所述 NDP帧或 NDPA帧中的空时流数。
一种反馈信道信息矩阵维数的通知装置, 所述装置包括:
通知单元, 位于发送方中, 用于以隐式方式和 /或显示方式通知接收方 应反馈信道信息矩阵的维数; 其中, 所述信道信息矩阵的维数为信道信息 矩阵的行数或者信道信息矩阵的行数及列数。
优选地, 所述通知单元进一步用于, 通过 NDP帧或 NDPA帧以隐式方 式和 /或显示方式通知接收方应反馈信道信息矩阵的行数或者行数及列数。
优选地,所述通知单元通知给所述接收方的 NDP帧或 NDPA帧中不包 含所述接收方应反馈信道信息矩阵的行数或者行数及列数的指示信息。
优选地, 所述装置还包括:
反馈单元, 用于在所述接收方接收到所述 NDP帧或 NDPA帧后, 向所 述发送方反馈信道信息矩阵的行数为所述接收方所能支持的最大发送天线 数或实际使用的发送天线数。
优选地, 所述装置还包括:
反馈单元, 用于在所述接收方接收到所述 NDP帧或 NDPA帧后, 向所 述发送方反馈信道信息矩阵的行数为当前所接收所述 NDP帧或 NDPA帧中 的空时流数。
优选地,所述通知单元通知给所述接收方的 NDP帧或 NDPA帧中包含 所述接收方应反馈信道信息矩阵的行数或者行数及列数的指示信息。
优选地, 所述装置还包括:
承载单元, 用于将接收方应反馈信道信息矩阵的行数或者行数及列数 的指示信息承载于 NDP帧的导频中。
优选地, 所述承载单元使用 NDP帧的 VHT-SIG-A信元和 /或保留比特 承载所述接收方应反馈信道信息矩阵的行数或者行数及列数的指示信息。
或者, 所述装置还包括:
承载单元, 用于将接收方应反馈信道信息矩阵的行数或者行数及列数 的指示信息承载于 NDPA帧中的 STA Info Field。
优选地, 所述装置还包括:
设置单元,在 NDPA帧中的 STA Info Field中分别设置承载关联身份标 识信息 AID的信元、承载反馈类型信息 Feedback Type的信元、承载应反馈 信道信息矩阵的行数的信元和承载信道信息矩阵的列数的信元;
所述承载单元将所获取的相应信息对应承载于各自对应的信元中。 优选地,在通知单元通知给所述接收方的 NDP帧或 NDPA帧中包含所 述接收方应反馈信道信息矩阵的行数或者行数及列数的指示信息时, 所述 装置还包括:
反馈单元, 用于在所述接收方接收到所述 NDP帧或 NDPA帧后, 向所 述发送方反馈信道信息矩阵的列数为当前所接收所述 NDP帧或 NDPA帧中 的空时流数。
本发明中, 波束成形发送方以隐式或显示方式通知接收方应反馈信道 信息矩阵的维数。 具体的, 可以在发送方发送给接收方的信道测量帧或信 道测量请求帧中携带接收方应反馈信道信息矩阵的维数的指示信息, 接收 方按发送方的指示信息进行信道信息矩阵维数反馈。 或者, 当发送方发送 给接收方的信道测量帧或信道测量请求帧中未携带接收方应反馈信道信息 矩阵的维数的指示信息时, 以约定的方式向发送方发送应反馈信道信息矩 阵的维数, 如向发送方反馈信道信息矩阵的行数为接收方所能支持的最大 发送天线数或实际使用的发送天线数, 或者向发送方反馈信道信息矩阵的 列数为当前所接收所述信道测量帧或信道测量请求帧中的空时流数。 本发 明通过简单的方式即实现了接收方应反馈信道信息矩阵的维数的通知, 从 而发送方根据接收到的反馈发送天线数来支持 MU-MIMO数据的发送。 附图说明
图 1为 IEEE 802.11ac信道测量帧或信道测量请求帧交换过程示意图; 图 2为 IEEE 802.1 lac中已经提出的 NDP物理层结构示意图; 图 3为本发明的 NDPA的反馈信息通知信令结构示意图;
图 4为本发明的 NDPA的反馈信息通知信令的另一结构示意图; 图 5为本发明的 NDPA的反馈信息通知信令的又一结构示意图; 图 6为本发明反馈信道信息矩阵维数的通知装置的组成结构示意图。 具体实施方式
本发明的基本思想为: 波束成形发送方以隐式或显示方式通知接收方 应反馈信道信息矩阵的维数。 具体的, 可以在发送方发送给接收方的信道 测量帧或信道测量请求帧中携带接收方应反馈信道信息矩阵的维数的指示 信息, 接收方按发送方的指示信息进行信道信息矩阵维数反馈。 或者, 当 发送方发送给接收方的信道测量帧或信道测量请求帧中未携带接收方应反 馈信道信息矩阵的维数的指示信息时, 以约定的方式向发送方发送应反馈 信道信息矩阵的维数, 如向发送方反馈信道信息矩阵的行数为接收方所能 支持的最大发送天线数或实际使用的发送天线数, 或者向发送方反馈信道 信息矩阵的列数为当前所接收所述信道测量帧或信道测量请求帧中的空时 流数。 本发明通过简单的方式即实现了接收方应反馈信道信息矩阵的维数 的通知, 从而发送方根据接收到的反馈发送天线数来支持 MU-MIMO数据 的发送。
为使本发明的目的, 技术方案和优点更加清楚明白, 以下举实施例并 参照附图, 对本发明进一步详细说明。
实施例一
本示例是以隐式方式通知接收方应反馈信道信息矩阵的维数的示例。 本示例中,发送方发送给接收方的 NDPA和 NDP中不包含接收方应反馈信 道信息矩阵的维数的指示信息。 这样, 在发送方接收到 NDPA和 NDP后, 以默认方式进行信道信息矩阵的维数的反馈。 具体的, 默认方式为, 波束 形成接收方反馈的多天线信息中的天线数, 即信道信息矩阵的行数(Nr ), 等于该用户反馈信道信息矩阵时所能支持的最大发送天线数或者当前实际 使用的发送天线数。 这样, 例如在多用户 MIMO 时, 用户 1 支持的 Beamformer最大发送天线数为 2,用户 2支持的 Beamformer最大发送天线 数为 4, 则用户 1和用户 2反馈信道矩阵的发送天线数分别为 2和 4。
实施例二
本示例是以显式方式通知接收方应反馈信道信息矩阵的维数的示例。 本示例中,发送方发送给接收方的 NDPA和 NDP中携带有接收方应反馈信 道信息矩阵的维数的指示信息。
由波束形成发送方通知应反馈信道信息矩阵的行数, 波束形成接收方 反馈的多天线信息中的发送天线数即信道信息矩阵的行数(Nr ), 具体通知 方式 口下:
NDP的物理层结构具体如图 2所示。 其中 NDP的 VHT-SIG-A通知的 信息包括 STA所应反馈的天线数信息即信道信息矩阵的行数( Nr ),采用比 特 B0-B2 , 因为 NDP的带宽和 NDPA相同, 因此可以将 NDP中的带宽表 示比特 B0-B1 ( NDPA帧也可以指示相同的带宽信息)和保留比特 B2联合 起来表示所应反馈支持的发送天线数即信道信息矩阵的行数( Nr )。
或者, NDP的 VHT-SIG-A通知的信息包括 STA所应反馈的天线数信 息, 采用比特 B0-B2, 因为 NDP的带宽和 NDPA相同, 因此可以将带宽表 示比特 B0-B1和保留比特 B2, B3和 B23联合起来表示所应反馈支持的发 送天线信息。
上述 STA所应反馈的天线数信息具体含义为,以三比特来指示 STA所 应反馈的天线数信息为例,三比特指示信息取值为 0表示 Nr限定为 1天线, 取值为 1表示 Nr限定为 2天线,取值为 2表示 Nr限定为 3天线,取值为 3 表示 Nr限定为 4天线, 取值为 4表示 Nr限定为 5天线, 取值为 5表示 Nr 限定为 6天线,取值为 6表示 Nr限定为 7天线,取值为 7表示 Nr限定为 8 天线。
实施例三
本示例是以显式方式通知接收方应反馈信道信息矩阵的维数的示例。 本示例中,发送方发送给接收方的 NDPA和 NDP中携带有接收方应反馈信 道信息矩阵的维数的指示信息。
由波束形成发送方通知应反馈信道信息矩阵的维数, 波束形成接收方 反馈的信道信息矩阵的行数(Nr ), 具体通知方式如下:
1. NDPA中的用户信息域( STA Info Field )应包含 AID (关联身份标 识), 反馈类型 (Feedback Type ), 要求反馈天线的维数 Nc (信道信息矩 阵的列数)和 Nr (天线数, 也即信道信息矩阵的行数), 具体如图 3或图 4 所示。 分别采用比特数为: AID为 9比特, 反馈类型 1比特, 反馈信道信 息矩阵的维数 Nc使用 3比特, 反馈信道信息矩阵的维数 Nr使用 3比特。
或者, AID为 12比特, 反馈类型 1 比特, 反馈信道信息矩阵的维数 Nc使用 3比特, 反馈信道信息矩阵的维数 Nr使用 3比特。
或者, AID为 12比特, 反馈类型 1 比特, 反馈信道信息矩阵的维数
Nc使用 3比特, 反馈信道信息矩阵的维数 Nr采用和发送天线 Ντχ差分的 方式来指示, 为 2比特。
2. NDPA中的用户信息域( STA Info Field )应包含 AID (关联身份标 识), 反馈类型 ( Feedback Type ), 要求反馈的信道信息矩阵的维数 Nc和
Nr, 如图 3或 4所示。 分别采用比特数为: AID为 9比特, 反馈类型使用 1 比特, 反馈信道信息矩阵的维数 Nc使用 4比特, 反馈信道信息矩阵的维数
Nr使用 3比特。
或者, AID为 12比特, 反馈类型为 1比特, 反馈信道信息矩阵的维数 Nr使用 3比特, 反馈信道信息矩阵的维数 Nc使用 3比特。
或者, AID为 12比特, 反馈类型为 1比特, 反馈信道信息矩阵的维数 Nr采用与发送天线 Ντχ差分的方式, 使用 2比特, 反馈信道信息矩阵的维 数 Nc使用 3比特。
上述要求反馈的信道信息矩阵的维数 Nr具体含义为, 以三比特来指示 STA所应反馈的天线数信息为例,三比特指示信息取值为 0表示 Nr限定为 1天线, 取值为 1表示 Nr限定为 2天线, 取值为 2表示 Nr限定为 3天线, 取值为 3表示 Nr限定为 4天线,取值为 4表示 Nr限定为 5天线,取值为 5 表示 Nr限定为 6天线, 取值为 6表示 Nr限定为 7天线, 取值为 7表示 Nr 限定为 8天线。
当反馈信道信息矩阵的行数 Nr采用与发送天线 Ντχ差分的方式来指示 时,通过 Nc以及相应的差分关系来确定波束成形接收方应反馈信道信息矩 阵的维数即可。
实施例四
本示例是以隐式方式通知接收方应反馈信道信息矩阵的维数的示例。 本示例中,发送方发送给接收方的 NDPA和 NDP中不包含接收方应反馈信 道信息矩阵的维数的指示信息。 这样, 在发送方接收到 NDPA和 NDP后, 以默认方式进行发送天线数的反馈。 具体的, 例如, 默认波束形成接收方 反馈的多天线信息中的发送天线数 (Nr ) 等于信道测量帧中的空时流数 NstS o 发送方接收到 NDPA和 NDP后, 将应反馈的发送线数设置为 NDP 中的空时流数 Nsts。
实施例五
本示例是以显式和隐式方式通知接收方应反馈信道信息矩阵的维数的 示例。 本示例中, 发送方发送给接收方的 NDPA和 NDP中携带有接收方应 反馈信道信息矩阵的行数指示信息, 信道信息矩阵的列数根据隐式方式通 知。
由波束形成发送方通知应反馈信道信息矩阵的维数, 波束形成接收方 反馈的信道信息矩阵的行数(Nr ), 具体通知方式如下:
NDPA中的用户信息域( STA Info Field )应包含 AID (关联身份标识), 反馈类型(Feedback Type ), 要求反馈天线的维数 Nr (天线数, 也即信道信 息矩阵的行数), 具体如图 5所示。 分别采用比特数为: AID为 9比特, 反 馈类型 1比特, 反馈信道信息矩阵的维数 Nr使用 3比特。
或者, AID为 12比特, 反馈类型 1 比特, 反馈信道信息矩阵的维数 Nr使用 3比特。
或者, AID为 12比特, 反馈类型 1 比特, 反馈信道信息矩阵的维数 Nr采用和发送天线 Ντχ差分的方式来指示, 为 2比特。
发送方发送给接收方的 NDPA和 NDP中不包含接收方应反馈信道信息 矩阵的列数指示信息。 这样, 在发送方接收到 NDPA和 NDP后, 以默认方 式进行信道信息矩阵列数的反馈。 具体的, 例如, 默认波束形成接收方反 馈的信道信息矩阵中的列数(Nc )等于信道测量帧中的空时流数 Nsts。 发 送方接收到 NDPA和 NDP后, 将应反馈的列数设置为 NDP中的空时流数 NstSo
实施例六
本示例是以显式和隐式方式通知接收方应反馈信道信息矩阵的维数的 示例。 本示例中, 发送方发送给接收方的 NDPA和 NDP中携带有接收方应 反馈信道信息矩阵的行数指示信息, 信道信息矩阵的列数根据隐式方式通 知。
由波束形成发送方通知应反馈信道信息矩阵的维数, 波束形成接收方 反馈的多天线信息中的发送天线数即信道信息矩阵的行数(Nr ), 具体通知 方式 口下:
NDP的物理层结构具体如图 2所示。 其中 NDP的 VHT-SIG-A通知的 信息包括 STA所应反馈的天线数信息即信道信息矩阵的行数( Nr ),采用比 特 B0-B2 , 因为 NDP的带宽和 NDPA相同, 因此可以将 NDP中的带宽表 示比特 B0-B1 ( NDPA帧也可以指示相同的带宽信息)和保留比特 B2联合 起来表示所应反馈支持的发送天线数即信道信息矩阵的行数( Nr )。
或者, NDP的 VHT-SIG-A通知的信息包括 STA所应反馈的天线数信 息, 采用比特 B0-B2, 因为 NDP的带宽和 NDPA相同, 因此可以将带宽表 示比特 B0-B1和保留比特 B2, B3和 B23联合起来表示所应反馈支持的发 送天线信息。
发送方发送给接收方的 NDPA和 NDP中不包含接收方应反馈信道信息 矩阵的列数指示信息。 这样, 在发送方接收到 NDPA和 NDP后, 以默认方 式进行信道信息矩阵列数的反馈。 具体的, 例如, 默认波束形成接收方反 馈的信道信息矩阵中的列数(Nc )等于信道测量帧中的空时流数 Nsts。 发 送方接收到 NDPA和 NDP后, 将应反馈的列数设置为 NDP中的空时流数 NstSo 通过上述实施例, 本发明提供了一种信道信息矩阵的维数通知方法, 通过隐式和 /或显式的方式通知信道信息矩阵维数反馈方, 用以支持多用户 的信道信息测量, 允许不同能力的用户在同一个信道测量请求帧下反馈信 道信息矩阵维数, 提高了信道信息矩阵维数的反馈质量和反馈效率, 提高 了系统性能。
本发明还记载了一种用于实现前述反馈信道信息矩阵维数的通知方法 的反馈信道信息矩阵维数的通知装置, 图 6为本发明反馈信道信息矩阵维 数的通知装置的组成结构示意图, 如图 6所示, 本发明反馈信道信息矩阵 维数的通知装置包括:
通知单元 60, 位于发送方中, 用于以隐式方式和 /或显示方式通知接收 方应反馈信道信息矩阵的维数; 其中, 所述信道信息矩阵的维数为信道信 息矩阵的行数或者信道信息矩阵的行数及列数。
上述通知单元 60进一步用于, 通过信道测量帧或信道测量请求帧以隐 式方式和 /或显示方式通知接收方应反馈信道信息矩阵的行数或者行数及列 数。
其中, 上述通知单元 60通知给所述接收方的信道测量帧或信道测量请 求帧中不包含所述接收方应反馈信道信息矩阵的行数或者行数及列数的指 示信息。
在图 6为本发明反馈信道信息矩阵维数的通知装置的基础上, 本发明 反馈信道信息矩阵维数的通知装置还包括:
反馈单元 61 , 用于在所述接收方接收到所述信道测量帧或信道测量请 求帧后, 向所述发送方反馈信道信息矩阵的行数为所述接收方所能支持的 最大发送天线数或实际使用的发送天线数。
或者, 反馈单元 61 , 用于在所述接收方接收到所述信道测量帧或信道 测量请求帧后, 向所述发送方反馈信道信息矩阵的列数为当前所接收所述 NDP帧或 NDPA帧中的空时流数。
上述通知单元 60通知给所述接收方的信道测量帧或信道测量请求帧中 包含所述接收方应反馈信道信息矩阵的行数或者行数及列数的指示信息。
在图 6为本发明反馈信道信息矩阵维数的通知装置的基础上, 本发明 反馈信道信息矩阵维数的通知装置还包括:
承载单元 62, 用于将接收方应反馈信道信息矩阵的行数或者行数及列 数的指示信息承载于 NDP帧的导频中。
上述承载单元 62使用 NDP帧的 VHT-SIG-A信元和 /或保留比特承载所 述接收方应反馈信道信息矩阵的行数或者行数及列数的指示信息。
或者, 承载单元 62, 用于将接收方应反馈信道信息矩阵的行数或者行 数及列数的指示信息承载于 NDPA帧中的 STA Info FiekL
在图 6为本发明反馈信道信息矩阵维数的通知装置的基础上, 本发明 反馈信道信息矩阵维数的通知装置还包括:
设置单元(图 6中未示出), 设置单元, 在 NDPA帧中的 STA Info Field 中分别设置承载关联身份标识信息 AID 的信元、 承载反馈类型信息 Feedback Type的信元、 承载应反馈信道信息矩阵的行数的信元和承载信道 信息矩阵的列数的信元;
所述承载单元将所获取的相应信息对应承载于各自对应的信元中。 本领域技术应当理解, 在前述通知单元 60通知给所述接收方的信道测 量帧或信道测量请求帧中包含所述接收方应反馈信道信息矩阵的行数的指 示信息的基础上, 本发明反馈信道信息矩阵维数的通知装置还包括: 反馈 单元 61 ,用于在所述接收方接收到所述 NDP帧或 NDPA帧后,向所述发送 方反馈信道信息矩阵的列数为当前所接收所述 NDP帧或 NDPA帧中的空时 流数。
本领域技术人员应当理解, 图 6所示的反馈信道信息矩阵维数的通知 装置中的各处理单元的实现功能可参照前述反馈信道信息矩阵维数的通知 方法的相关描述而理解。 图 6所示的频谱资源重配装置中各单元的功能可 通过运行于处理器上的程序而实现, 也可通过具体的逻辑电路而实现。 本 领域技术人员应当理解, 除图中的通知单元 60外, 其余各处理单元均为优 化本发明反馈信道信息矩阵维数的通知装置而设置的, 并非用于实现本发 明反馈信道信息矩阵维数的通知装置的必要处理单元。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围。
工业实用性
本发明中, 波束成形发送方以隐式或显示方式通知接收方应反馈信道 信息矩阵的维数。 从而通过简单的方式实现了接收方应反馈信道信息矩阵 的维数的通知, 从而发送方根据接收到的反馈发送天线数支持 MU-MIMO 数据的发送。

Claims

权利要求书
1、 一种反馈信道信息矩阵维数的通知方法, 其中, 所述方法包括: 发送方以隐式方式和 /或显示方式通知接收方反馈信道信息矩阵的维 数。
2、 根据权利要求 1所述的方法, 其中, 所述信道信息矩阵的维数为信 道信息矩阵的行数或者信道信息矩阵的行数及列数。
3、 根据权利要求 2所述的方法, 其中, 所述发送方通过信道测量 NDP 帧或信道测量请求 NDPA帧以隐式方式和 /或显示方式通知接收方应反馈信 道信息矩阵的行数或者行数及列数。
4、根据权利要求 3所述的方法,其中,所述发送方通过 NDP帧或 NDPA 帧以隐式方式通知接收方应反馈信道信息矩阵的行数或者行数及列数, 为: 所述发送方发送给所述接收方的 NDP帧或 NDPA帧中不包含所述接收 方应反馈信道信息矩阵的行数或者行数及列数指示信息。
5、 根据权利要求 4所述的方法, 其中, 所述方法还包括:
所述接收方接收到所述 NDP帧或 NDPA帧后, 向所述发送方反馈信道 信息矩阵的行数为所述接收方反馈信道信息矩阵中所能支持的最大发送天 线数或实际使用的发送天线数。
6、 根据权利要求 4所述的方法, 其中, 所述方法还包括:
所述接收方接收到所述 NDP帧或 NDPA帧后, 向所述发送方反馈信道 信息矩阵的行数为当前所接收所述 NDP帧或 NDPA帧中的空时流数。
7、根据权利要求 3所述的方法,其中,所述发送方通过 NDP帧或 NDPA 帧以显式方式通知接收方应反馈信道信息矩阵的行数或者行数及列数, 为: 所述发送方发送给所述接收方的 NDP帧或 NDPA帧中包含所述接收方 应反馈信道信息矩阵的行数或者行数及列数指示信息。
8、 根据权利要求 7所述的方法, 其中, 所述接收方应反馈信道信息矩 阵的行数指示信息承载于 NDP帧的导频中。
9、 根据权利要求 8所述的方法, 其中, 所述接收方应反馈信道信息矩 阵的行数指示信息由 NDP帧的 VHT-SIG-A中的信元比特承载。
10、 根据权利要求 7所述的方法, 其中, 所述接收方应反馈信道信息 矩阵的行数指示信息承载于 NDPA帧中。
11、 根据权利要求 10所述的方法, 其中, 所述接收方应反馈信道信息 矩阵的行数指示信息承载于 NDPA帧中的用户信息域 STA Info Field中。
12、 根据权利要求 11所述的方法, 其中, 所述接收方应反馈信道信息 矩阵的行指示信息承载于 NDPA帧中的 STA Info Field中, 为:
在 NDPA帧中的 STA Info Field中分别设置承载关联身份标识信息 AID 的信元、 承载反馈类型信息 Feedback Type的信元、 信道信息矩阵的行数和 信道信息矩阵的列数。
13、 根据权利要求 8至 12中任一项所述的方法, 其中, 所述方法还包 括:
所述接收方接收到所述 NDP帧或 NDPA帧后, 向所述发送方反馈信道 信息矩阵的列数为当前所接收所述 NDP帧或 NDPA帧中的空时流数。
14、 一种反馈信道信息矩阵维数的通知装置, 其中, 所述装置包括: 通知单元, 位于发送方中, 用于以隐式方式和 /或显示方式通知接收方 应反馈信道信息矩阵的维数; 其中, 所述信道信息矩阵的维数为信道信息 矩阵的行数或者信道信息矩阵的行数及列数。
15、 根据权利要求 14所述的装置, 其中, 所述通知单元进一步用于, 通过 NDP帧或 NDPA帧以隐式方式和 /或显示方式通知接收方应反馈信道 信息矩阵的行数或者行数及列数。
16、 根据权利要求 15所述的装置, 其中:
所述通知单元通知给所述接收方的 NDP帧或 NDPA帧中不包含所述接 收方应反馈信道信息矩阵的行数或者行数及列数的指示信息。
17、 根据权利要求 16所述的装置, 其中, 所述装置还包括: 反馈单元, 用于在所述接收方接收到所述 NDP帧或 NDPA帧后, 向所 述发送方反馈信道信息矩阵的行数为所述接收方所能支持的最大发送天线 数或实际使用的发送天线数。
18、 根据权利要求 16所述的装置, 其中, 所述方法还包括: 反馈单元, 用于在所述接收方接收到所述 NDP帧或 NDPA帧后, 向所 述发送方反馈信道信息矩阵的行数为当前所接收所述 NDP帧或 NDPA帧中 的空时流数。
19、 根据权利要求 15所述的装置, 其中:
所述通知单元通知给所述接收方的 NDP帧或 NDPA帧中包含所述接收 方应反馈信道信息矩阵的行数或者行数及列数的指示信息。
20、 根据权利要求 19所述的装置, 其中, 所述装置还包括: 承载单元, 用于将接收方应反馈信道信息矩阵的行数或者行数及列数 的指示信息承载于 NDP帧的导频中。
21、 根据权利要求 20所述的装置, 其中, 所述承载单元使用 NDP帧 的 VHT-SIG-A信元和 /或保留比特承载所述接收方应反馈信道信息矩阵的 行数或者行数及列数的指示信息。
22、 根据权利要求 19所述的装置, 其中, 所述装置还包括: 承载单元, 用于将接收方应反馈信道信息矩阵的行数或者行数及列数 的指示信息承载于 NDPA帧中的 STA Info Field。
23、 根据权利要求 22所述的装置, 其中, 所述装置还包括: 设置单元,在 NDPA帧中的 STA Info Field中分别设置承载关联身份标 识信息 AID的信元、承载反馈类型信息 Feedback Type的信元、承载应反馈 信道信息矩阵的行数的信元和承载信道信息矩阵的列数的信元; 所述承载单元将所获取的相应信息对应承载于各自对应的信元中。
24、 根据权利要求 19至 23 中任一项所述的装置, 其中, 所述装置还 包括:
反馈单元, 用于在所述接收方接收到所述 NDP帧或 NDPA帧后, 向所 述发送方反馈信道信息矩阵的列数为当前所接收所述 NDP帧或 NDPA帧中 的空时流数。
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