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Method and device for reporting status information of channel

A technology of channel status information and status information, which is applied in the field of communication, can solve problems such as large system bandwidth span, unacceptable system, and large amount of information, and achieve the effect of reducing the occupancy rate of channel resources and reducing the amount of information

Inactive Publication Date: 2010-08-18
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The bandwidth of the LTE-Advanced system can reach up to 100MHz, and the LTE-Advanced system contains multiple component carriers; if the UE uses the same reporting method as the LTE system to report channel state information such as CQI to the system, it will be due to the system bandwidth span If it is too large, one wideband CQI cannot well reflect the channel conditions on the entire working bandwidth; and if all the wideband CQIs and subband CQIs corresponding to all component carriers are reported, due to the large amount of information, too many channel resources will be occupied. is also not advisable

Method used

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  • Method and device for reporting status information of channel
  • Method and device for reporting status information of channel

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, the method for reporting channel state information provided by the embodiment of the present invention includes:

[0042] 11. Select a component carrier from multiple component carriers of the LET-Advanced system as a reference component carrier;

[0043] The reference component carrier may be the component carrier with the best wideband channel state information among the multiple component carriers, or the component with the smallest absolute difference with the average value of the wideband channel state information of the multiple component carriers carrier.

[0044]12. Determine at least one component carrier that needs to feed back wideband CQI and subband CQI from the plurality of component carriers;

[0045] When the UE feeds back channel state information such as CQI to the system, it can report the wideband CQI corresponding to each component carrier, or choose to report the wideband CQI of some component carriers, or only report t...

Embodiment 2

[0055] Such as figure 2 As shown, in the LTE-Advanced system, the entire working bandwidth is composed of five component carriers (A, B, C, D, E), and the CQI of each component carrier is shown in Table 1; the system requires the UE to feed back the five The wideband CQI information of the two component carriers with the best quality among the component carriers and all the corresponding subband CQI information.

[0056] Table 1

[0057] Carrier

wideband CQI

A

6

B

9

C

8

D

12

E

7

[0058] refer to image 3 As shown, the method for reporting channel state information provided by the embodiment of the present invention specifically includes the following steps:

[0059] 31. Select two component carriers with the best quality among the above five component carriers.

[0060] According to the wideband CQIs of the five constituent carriers shown in Table 1, it can be clearly seen that the chann...

Embodiment 3

[0076] Such as figure 2 In the LTE-Advanced system shown, the entire working bandwidth is formed by the aggregation of five component carriers (A, B, C, D, E). The CQI of each component carrier is shown in Table 4; the system requires the UE to feed back the five The wideband CQI information of the constituent carriers is fed back, and all subband CQI information on the two constituent carriers with the best quality is fed back.

[0077] Table 4

[0078] Carrier

wideband CQI

A

8

B

11

C

9

D

10

E

9

[0079] refer to Figure 4 As shown, the method for reporting channel state information provided by the embodiment of the present invention specifically includes the following steps:

[0080] 41. Select at least one component carrier that needs to feed back wideband CQI and subband CQI.

[0081] According to the requirements of the system in the embodiment of the present invention, and referring...

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Abstract

The embodiment of the invention discloses a method and a device for reporting the status information of a channel, relates to the technical field of communication; and aims to realize the effective feedback of the status information of the channel in an LTE-Advanced system and reduce feedback information content. The method for reporting the status information of the channel provided by the embodiment of the invention comprises the following steps of: feeding the status information of a broad-band channel of at least one component carrier back to a system in a differential mode; and reporting the status information of a sub-band channel corresponding to the at least one component carrier in the status information, which needs to be fed back, of the broad-band channel to the system in a secondary differential mode. The method and the device for reporting the status information of the channel provided by the embodiment of the invention are suitable for the feedback of the status information of channels such as CQI, PMI, RI and the like of the LTE-Advanced system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for reporting channel state information in an LTE-Advanced system. Background technique [0002] In the LTE (Long Term Evolution, long-term evolution) system, UE (User Equipment, user equipment) needs to feed back some channel state information to the system, such as CQI (Channel Quality Indicator, channel quality indicator), PMI (Precoding Matrix Indicator, precoding matrix Indication) and RI (Rank Indication, rank indication), etc. [0003] Taking CQI feedback as an example, in order to reflect the situation of the UE receiving the signal, the UE needs to report to the system a wideband CQI (wideband CQI) indicating the channel condition on the entire working bandwidth; at the same time, in order to provide eNodeB (base station) with scheduling reference information, in In some modes, the UE also needs to report the subband CQI (subband CQI) ...

Claims

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Application Information

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IPC IPC(8): H04W28/20H04B7/26
Inventor 李亚娟常俊仁李强武雨春
Owner HUAWEI TECH CO LTD
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