Method, device and system for periodic feedback of sub-band channel information

Abstract

The invention discloses a period feedback method, device and system of sub-band channel information and relates to a communication technology. When period feedback is performed on a terminal, feedback of broadband and / or sub-band channel information which is measured through a non-zero power CSI - RS (Channel State Information - Reference Signal) source and broadband and sub-band CQI (Channel Quality Indicator) information of the non-zero power CSI - RS source and based on an interference hypothesis or a plurality of interference hypotheses is performed and accordingly feedback of broadband and sub-band channel information of a CQI value of a transmission point and based on the interference hypothesis or the plurality of different interference hypotheses is approved. Corresponding parameters such as non-zero power reference signals, configuration information which interferes with measurement resources and period feedback reporting time configuration parameters are configured for the terminal side through the network side and accordingly the required broadband channel information which is measured through the non-zero power CSI - RS source and based on the interference hypothesis or the plurality of different interference hypotheses can be received on expected sub-frames.

Description

technical field [0001] The present invention relates to communication technology, in particular to a method, device and system for periodic feedback of sub-band channel information. Background technique [0002] The long-term evolution-advanced (LTE-A, long-term evolution-advanced) system adopts the same-frequency networking, which not only greatly improves the spectrum utilization rate, but also causes serious signal fading at the edge of the cell and suffers from high interference from other cells. If the signal fading and interference problems are not dealt with, it will seriously affect the experience of edge users. Coordinated multiple point (CoMP) technology introduces information interaction and joint transmission between multiple cells, which can not only improve signal quality but also reduce inter-cell interference, thereby greatly improving the data transmission performance of cell edge users. [0003] The current coordinated multi-point transmission schemes can ...

AI Technical Summary

Problems solved by technology

However, the existing periodic feedback mode is designed to support single-point multiple input multiple output (MIMO), and only supports CSI feedback based on a non-zero power CSI-RS resource measurement. At the same time, the design does not consider Dynamic frequency domain interference coordination, CQI interference measurement is only realized by configuring different interference measurement sets in the time domain, that is, CQI in the same feedback mode does not distinguish interference measurement

Therefore, a periodic feedback mode cannot support subband channel information feedback of a transmission point based on CQI values ​​of one or more different interference assumptions

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