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A method for indicating uplink subband precoding matrix, terminal and base station

A precoding matrix and subband technology, which is applied to the indication method of the uplink subband precoding matrix, terminal and base station fields, can solve the problems of unfavorable signal interference management, unstable transmission performance, and reduced uplink transmission performance, etc., to maintain stability sexual effect

Active Publication Date: 2020-11-10
HUAWEI TECH CO LTD
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Problems solved by technology

When the sub-band width changes with the scheduling area, the base station indicates to the terminal that the sub-band TPMI for uplink transmission also changes, and the precoding matrix used for uplink transmission on the sub-band also changes accordingly, which is not conducive to the sub-band for uplink transmission. Band-level signal interference management also reduces the performance of uplink transmissions
[0005] In summary, the existing method of determining the subband width based on the scheduling width leads to unstable transmission performance of uplink transmission on the subband

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  • A method for indicating uplink subband precoding matrix, terminal and base station
  • A method for indicating uplink subband precoding matrix, terminal and base station
  • A method for indicating uplink subband precoding matrix, terminal and base station

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[0079] The application will be described in further detail below in conjunction with the accompanying drawings.

[0080] The system operating environment of this application is introduced below. The technology described in this application can be applied to LTE systems, such as LTE / LTE-A / eLTE systems, or other wireless communication systems using various wireless access technologies, such as code division multiple address (code division multiple access, CDMA), frequency division multiple access (frequency division multiple access, FDMA), time division multiple access (time division multiple access, TDMA), orthogonal frequency division multiple access (orthogonal frequency division multiple access, OFDMA), Single carrier frequency division multiple access (single carrier-frequency division multiple access, SC-FDMA) and other access technology systems are also applicable to subsequent evolution systems, such as the fifth generation 5G (also called new radio (new radio, NR )) sys...

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Abstract

The present application discloses a method for indicating an uplink subband precoding matrix, a terminal and a base station. The method includes: the terminal receives downlink control information sent by the base station, the downlink control information includes a first bit interval, and the bits in the first bit interval The number is fixed, and the bits in the first bit interval are used to indicate the transmission precoding matrix number of the subband group; wherein, the subband group includes one or more subbands, and the number of subbands in the subband group is based on the uplink resource scheduling occupied The number of subbands is dynamically adjusted; according to the downlink control information, the terminal obtains the precoding matrix subset corresponding to the sequence number of the sending precoding matrix; encoding matrix. In this method, based on the fact that the width of the subband group is adjustable according to the width of uplink resource scheduling, the precoding matrix is ​​indicated through the subband group, which is beneficial to the management of signal interference at the subband level and the improvement of uplink data transmission performance.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular to a method for indicating an uplink subband precoding matrix, a terminal and a base station. Background technique [0002] In the discussion of the 3rd generation partnership project (3rd generation partnership project, 3GPP) new air interface (New Radio access technology, NR), currently uplink multi-antenna transmission is confirmed to be supported. The uplink multi-antenna transmission mechanism is similar to the downlink. The terminal first sends a sounding reference signal (SRS), and the base station receives the SRS and obtains the uplink channel state through channel estimation, and then sends downlink control information (DCI) to schedule Uplink transmission. Based on the conclusions of the current NR discussion, it can support up to 4 uplink SRS ports. In addition, considering the case of codebook-based uplink transmission, when instructing the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/12
CPCH04B7/0456H04W72/0453H04W72/1268H04W72/23H04B1/40H04W72/04H04W72/12
Inventor 孙彦良
Owner HUAWEI TECH CO LTD
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