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Dynamic clustering reduced hidden feedback overhead method

An implicit feedback and clustering technology, applied in the direction of preventing/detecting errors through diversity reception, electrical components, digital transmission systems, etc., can solve the problems of not considering the accuracy of CQI information, large feedback overhead, etc., and achieve reasonable and effective use The effect of frequency spectrum, increased accuracy, and reduced cost of use

Inactive Publication Date: 2011-01-19
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

Although this technical solution can greatly reduce the feedback overhead of users under the premise of ensuring the system capacity by selecting an appropriate SNR threshold value, this technical solution does not take into account the accuracy of the CQI information collected in each cluster. And the feedback overhead is still relatively large

Method used

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  • Dynamic clustering reduced hidden feedback overhead method
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Embodiment Construction

[0023] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0024] Step 1, divide the serving cell where the user is located.

[0025] According to the radius of the serving cell or the strength of the signal sent by the base station, the serving cell where the user is located is divided into a central area and an edge area.

[0026] figure 2 Describes an embodiment of dividing serving cells according to the size of the serving cell radius, wherein the serving cell radius is R meters, the central area ranges from 0 to r meters, and the edge area ranges from r to R meters.

[0027] Step 2, select a coordinated multi-point cell.

[0028] When the user is located in the central area, only the serving base station provides services for the user;

[0029] When the user is located in the edge area, due to the path loss, a cell is selected from the L cells closest to the user according to the link quality to provide services for the us...

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Abstract

The invention relates to a dynamic clustering reduced hidden feedback overhead method in the technical field of wireless communication, which comprises the steps of: 1, dividing a service cell in which a user is located; 2, selecting a multipoint cooperation cell; 3, after detecting pilot frequency information by a user, expressing channel state information by using a signal-to-noise ratio; 4, rearranging physical resource blocks by the user according to the channel condition; 5, judging the clustering of the rearranged physical resource blocks; 6, with a cluster as a feedback unit, feeding back the channel information to a base station; and 7, scheduling the resources by a service base station according to the fed back channel information. The user feedback overhead can be reduced through double-codebook pre-coding and dynamic clustering under the premise of not influencing the system capacity, thus the invention is widely suitable for a complicated network system and occasions with large user service traffic.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for dynamically clustering to reduce downlink multi-point coordinated implicit feedback overhead. Background technique [0002] In the next-generation mobile communication Long Term Evolution (LTE-A) system, in order to solve the problem of large amount of user feedback information and inaccurate feedback accuracy under the coordinated multi-point architecture in the wireless network, various feedback compression mechanisms are used to reduce downlink CoMP implicit feedback overhead. For example, the technical solution disclosed in the patent application "Method for Reducing Downlink Coordinated Multi-point Implicit Feedback Overhead" (Application No. 201010013573.X). [0003] In order to meet the performance index of LTE-A, especially the performance requirement of LTE-A for cell edge users, the technical solution performs channel state information feedb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04L1/06H04L1/00
Inventor 杨清海吕磊吕潇潇
Owner XIDIAN UNIV
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