Channel feedback method and user terminal for multi-cell cooperation

A technology of multi-cell cooperation and channel feedback, which is applied in the direction of using the return channel for error prevention/detection, digital transmission systems, electrical components, etc., and can solve problems such as insufficient feedback and inability to perceive the channel environment through aperiodic channel feedback.
CN103873208BActive Publication Date: 2017-08-25CHINA TELECOM CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA TELECOM CORP LTD
Publication Date
2017-08-25

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Abstract

The invention discloses a channel feedback method and a user terminal for multi-cell cooperation, and relates to the field of mobile communication. The method includes counting the average correlation matrix of the downlink channel of the cell corresponding to the subframe segment at the current moment according to the cell reference signals in M ​​subframes received continuously; Matrix, calculate the change of the average correlation matrix of the downlink channel of the cell at the current moment; judge the channel environment at the current moment according to the change of the average correlation matrix of the downlink channel of the cell at the current moment, determine whether to initiate a channel feedback cycle change request according to the signal environment at the current moment, so as to adjust the channel feedback cycle . The present invention adaptively adjusts the channel feedback period according to the change of the signal environment at the current moment. If the feedback period in the current environment becomes longer, the uplink resource overhead can be saved, and if the feedback period in the current environment becomes shorter, the feedback can be timely Channel state information.
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Description

technical field

[0001] The invention relates to the field of mobile communication, in particular to a channel feedback method and a user terminal for multi-cell cooperation. Background technique

[0002] Coordinated Multiple Points (CoMP for short) in a wireless communication system refers to a plurality of geographically separated transmission points that cooperate to participate in data transmission of the same terminal. CoMP technology mainly includes joint processing and collaborative shaping. Joint processing technology means that in the downlink transmission direction, all cells serving a user terminal (referred to as UE) store data packets sent to the UE, and the system selects some or all of the cells according to the difference between the scheduling results and business requirements Send data to the UE. The cooperative shaping technology refers to the coordination between the serving cell and the coordinating cell to transmit the beam direction of the signal, avo...

Claims

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