Channel information feedback method, terminal and base station

A technology of channel information feedback and channel information, which is applied in the field of terminals and base stations, and the field of channel information feedback methods, which can solve the problems of high channel information feedback overhead and achieve the effect of reducing feedback overhead and saving overhead

Inactive Publication Date: 2011-08-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In each reporting cycle, the terminal needs to report the position information of the optimal subband in the BP to the base station, and the overhead of channel information feedback is relatively large

Method used

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  • Channel information feedback method, terminal and base station
  • Channel information feedback method, terminal and base station
  • Channel information feedback method, terminal and base station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides a channel information feedback method. In this embodiment, the WB (wideband) between the terminal and the base station includes J BPs (partial bandwidth), and each BP includes multiple SBs (subbands). In one reporting cycle, the terminal needs to report a wideband CQI, and perform K rounds of reporting on the CQI of the optimal subband selected from each BP. Wherein, the value of J may take an integer greater than or equal to 1, and the value of K may take an integer greater than or equal to 1. Such as figure 1 As shown, the method includes:

[0054] 101. The terminal reports to the base station channel information that does not carry the optimal subband position, and the channel information that does not carry the optimal subband position includes the channel quality indicator CQI of the broadband, and the CQI of the optimal subband in each part of the bandwidth of the broadband ;

[0055] 102. The terminal reports to the base station the ch...

Embodiment 2

[0059] This embodiment is a channel information feedback method using rule 1, and the application scenario is a single-carrier scenario or a multi-carrier scenario.

[0060] When the application scenario is a single carrier scenario, the WB (wideband) between the terminal and the base station includes J BPs (partial bandwidth), and each BP includes multiple SBs (subbands). In one reporting cycle, the terminal needs to report a wideband CQI, and perform K rounds of reporting on the CQI of the optimal subband selected from each BP. Wherein, the value of J may take an integer greater than or equal to 1, and the value of K may take an integer greater than or equal to 1.

[0061] When the application scenario is a multi-carrier scenario, the terminal occupies M CCs (constituting carriers), and each CC occupies a certain bandwidth, which is called the WB (wideband) of the CC. The WB of each CC can also be divided into J BPs ( Partial bandwidth), each BP includes multiple SBs (subba...

Embodiment 3

[0123] This embodiment provides a channel information feedback method, such as image 3 As shown, on the terminal side, the method includes:

[0124] 301. The terminal obtains the difference between the optimal subband position of the partial bandwidth and the optimal subband position in the channel information reported to the base station last time;

[0125] 302. The terminal reports to the base station channel information carrying the optimal subband position difference, where the channel information carrying the optimal subband position difference includes the CQI of the broadband and the optimal subband in each part of the bandwidth of the broadband CQI, and the difference between the optimal sub-band position and the optimal sub-band position in the channel information reported to the base station last time;

[0126] Wherein, the number of bits occupied by the difference is smaller than the number of bits occupied by the optimal sub-band position.

[0127] 303. The base...

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Abstract

The embodiment of the invention discloses a channel information feedback method, a terminal and a base station. The method comprises the steps as follows: channel information without optimal subband position is reported to a base station; the channel information without the optimal subband position I comprises a wideband channel quality indication CQI and the CQI of the optimal subbands in each bandwidth; and the channel information with the optimal subband position is reported to the base station when a reconfiguration condition is realized. The channel information with the optimal subband position comprises the wideband CQI, the CQI of the optimal subbands in each bandwidth, and the optimal subband position. The invention is suitable for a terminal to implement channel information feedback to the base station.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a channel information feedback method, a terminal and a base station. Background technique [0002] In the LTE-A (Long Term Evolution-Advanced, Advanced Long Term Evolution) system, in the process of communication between the terminal and the base station, the terminal needs to feed back channel state information to the base station, and the base station determines the downlink communication channel according to the channel state information fed back by the terminal. The MCS (Modulation and Coding Scheme, modulation and coding scheme) used in order to better serve the next downlink communication. [0003] In indirect channel state information feedback, the information fed back by the terminal to the base station may include CQI (Channel Quality Information, channel quality indication). The terminal estimates the SINR (Signal to Interference plus Noise Ratio, Signal to Inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04W88/02H04W88/08
CPCH04W72/08H04W72/54
Inventor 张兴炜冯淑兰陈小波
Owner HUAWEI TECH CO LTD
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