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Feedback method of channel quality information and terminal

A channel quality information and feedback method technology, applied in the channel quality information feedback method and terminal field, can solve the problem of high overhead and achieve the effect of reducing feedback overhead

Active Publication Date: 2010-07-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The present invention is proposed in view of the relatively large overhead of terminal CQI feedback during CoMP transmission in the related art. Therefore, the main purpose of the present invention is to provide an improved CQI feedback scheme to solve at least one of the above problems

Method used

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  • Feedback method of channel quality information and terminal
  • Feedback method of channel quality information and terminal
  • Feedback method of channel quality information and terminal

Examples

Experimental program
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Effect test

Embodiment 1

[0047] According to an embodiment of the present invention, a CQI feedback method is provided, which is applied to a terminal for wideband CQI feedback, wherein the serving cell of the terminal performs cooperative transmission with multiple coordinated cells, and the method includes: the terminal feeds back CQI information to the network side, Wherein, the CQI information includes: the wideband CQI index of the serving cell and the wideband CQI index differential offset level of each coordinated cell in multiple coordinated cells, wherein the wideband CQI index differential offset level of the coordinated cell is the wideband CQI of the serving cell index minus the wideband CQI index of the coordinated cell.

[0048] Using this embodiment, the overhead used by the wideband CQI index differential offset level of each coordinated cell is 3 bits.

[0049] Specifically, the wideband CQI index of each coordinated cell is differentially fed back, and the offset table of the differe...

Embodiment 2

[0057] According to an embodiment of the present invention, a CQI feedback method is provided, which is applied to high-level configuration subband CQI feedback, wherein the serving cell of the terminal performs cooperative transmission with multiple coordinated cells, and the method includes: the terminal feeds back CQI information to the network side, Wherein, the CQI information includes: CQI index differential offset level on each subband of the serving cell and each subband CQI index differential offset level of each coordinated cell in multiple coordinated cells, wherein, the subband CQI index of the serving cell The differential offset level is the subband CQI index of the serving cell minus the wideband CQI index of the serving cell, and the differential offset level of the subband CQI index of the coordinated cell is the subband CQI index of the coordinated cell minus the wideband CQI index of the serving cell. Here, the overhead used by each subband CQI index differen...

Embodiment 3

[0070] According to an embodiment of the present invention, a CQI feedback method is provided, which is applied to a terminal to select subband CQI feedback, wherein the serving cell of the terminal performs coordinated transmission with multiple coordinated cells, and the method includes: the terminal feeds back CQI information to the network side, Wherein, the CQI information includes: the wideband CQI index of the serving cell, the wideband CQI index differential offset level of each of the multiple coordinated cells, the serving cell selected by the terminal, and the multiple optimal subbands among the multiple coordinated cells The average CQI index differential offset level, where the wideband CQI index differential offset level of the coordinated cell is the wideband CQI index of the serving cell minus the wideband CQI index of the coordinated cell, and the average CQI index differential offset level of multiple better subbands The wideband CQI index of the serving cell ...

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Abstract

The invention discloses a feedback method of channel quality information (CQI) and a terminal. In the method, the terminal feeds back CQI to the network side, wherein CQI comprises the wideband CQI index of the serving cell and the wideband differential CQI index offset level of each coordinating cell in a plurality of coordinating cells; and the wideband differential CQI index offset level of the coordinating cell is the wideband CQI index of the serving cell minus the wideband CQI index of the coordinating cell. The technical scheme provided by the invention solves the problem that the overhead is high when the terminal feeds back CQI during CoMP transmission in the related art, thus further reducing the feedback overhead of the terminal.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel quality information (Channel Quality Information, CQI for short) feedback method and a terminal in a coordinated multi-point (CoordinationMultiPoint, CoMP for short) transmission technology. Background technique [0002] In order to provide a higher throughput rate and solve the interference problem between cells, the new generation wireless communication system considers introducing a cooperative Multiple Input Multiple Output (MIMO) technology between network levels, among which, the new generation wireless communication system here The communication system may be Long-Term Evolution Advance (LTE-Advance for short), International Mobile Telecommunications Advanced (International MobileTelecommunication Advance, IMT-Advance for short), and the like. In LTE-Advance, the CoMP transmission technology has been formally studied as a candidate technology. Since the antenna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W72/12
Inventor 段亚军朱常青孙云锋张峻峰姜静张晨晨
Owner ZTE CORP
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