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Channel information feedback method and equipment

A technology of channel information feedback and network equipment, applied in diversity/multi-antenna systems, location diversity, space transmit diversity, etc., to achieve the effect of flexible non-coherent joint transmission

Active Publication Date: 2021-05-04
CHINA MOBILE COMM LTD RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] An object of the embodiments of the present invention is to provide a method and device for channel information feedback to solve the problem of single transmission node / multiple transmission node adaptive transmission

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  • Channel information feedback method and equipment
  • Channel information feedback method and equipment
  • Channel information feedback method and equipment

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Embodiment Construction

[0065] Taking periodic channel state information (Channel State Information, CSI) feedback as an example, two base stations configure a CSI report configuration (CSI-ReportConfig) for the terminal respectively, and associate 2-3 non-zero power CSI-RS resource settings respectively (NZP CSI-RS Resource Setting). The terminal needs to perform channel estimation on the transmission node 1 (TRP1) and the transmission node 2 (TRP 2) based on the NZP CSI-RS Resource Setting configured by each transmission node (TRP), and feed back the CSI (channel state information reference signal resource indication (CRI) / RI / precoding matrix indication (PMI) / channel quality indication (CQI)) to TRP1 and TRP2. In the current New Radio (NR) protocol, when the user feeds back the number of streams (RI) of channel information, at least one stream must be fed back by default.

[0066] For non-ideal backhaul non-coherent transmission, current protocols cannot support Single-TRP / Multiple-TRP adaptive tr...

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Abstract

The embodiment of the invention provides a channel information feedback method and equipment. The method comprises the following steps: measuring a channel state; according to the channel state, determining an RI indication field, the RI indication field being used for representing whether network equipment needs to carry out data transmission or not and the number of data streams during network transmission; and reporting a CSI report to the network equipment, wherein the CSI report carries the RI indication field. In the embodiment of the invention, the terminal can inform the base station whether data transmission needs to be carried out or not, so that Single-TRP / Multiple TRP self-adaptive transmission is realized, and incoherent joint transmission is more flexible.

Description

technical field [0001] The embodiments of the present invention relate to the field of communication technologies, and in particular to a method and device for channel information feedback. Background technique [0002] The multi-point transmission technology is a cooperative transmission through multiple nodes in the mobile network. The multi-point transmission technology utilizes the cooperation of multiple cells to improve the spectrum efficiency and system throughput of edge users. [0003] At low frequencies, this technology can better overcome inter-cell interference and improve the transmission efficiency of edge users. At high frequencies, this technology aims to improve the rate experience of edge users, enhance edge coverage, and provide edge users with the same experience as central users. [0004] The downlink multi-point transmission technology includes the following specific solutions: [0005] 1) Dynamic Point Selection (Dynamic Point Selection): [0006] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/024H04B7/06
CPCH04B7/024H04B7/0626H04B7/06
Inventor 王菡凝李岩金婧王飞王启星刘光毅
Owner CHINA MOBILE COMM LTD RES INST