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Method and user terminal for multi-station multi-user joint transmission

一种用户终端、联合传输的技术，应用在传输系统、无线电传输系统、分集/多天线系统等方向

Active Publication Date: 2015-04-08
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if only synthetic channel information is fed back, the eNB is no longer able to perform single-cell SU / MU MIMO scheduling or coordinated scheduling / coordinated beamforming schemes

Method used

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  • Method and user terminal for multi-station multi-user joint transmission
  • Method and user terminal for multi-station multi-user joint transmission
  • Method and user terminal for multi-station multi-user joint transmission

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Embodiment Construction

[0017] Hereinafter, the present invention will be described based on the accompanying drawings. In the following description, some specific embodiments are only for the purpose of description, which should not be construed as any limitation on the present invention, but are only examples. Conventional structures or constructions will be omitted when it may cause to obscure the understanding of the present invention.

[0018] The present invention proposes a multi-site multi-user joint transmission strategy based on channel feedback of each site and channel feedback between additional sites. Each UE reports a plurality of per-site channel quantization information and per-site channel quality information (CQI) from each cooperating eNB. Based on these kinds of feedback information, the eNB can perform single-cell SU / MU MIMO scheduling or some other sub-optimal multi-site scheduling and transmission. If more excellent multi-site joint transmission is performed on the eNB side o...

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Abstract

The present invention proposes a method for multi-site multi-user joint transmission, the method comprising: measuring, by a user terminal, a downlink channel originated from each base station; according to the measurement for the downlink channel, quantizing and obtaining, by the user terminal, per-site channel information for the each base station and additional inter-site channel information, the additional inter-site channel information being used for calculating joint channel information of multiple base stations; and feeding back, by the user terminal, the per-site channel information for the each base station and the additional inter-site channel information so that the base station performs scheduling to execute the multi-site multi-user joint transmission.

Description

technical field [0001] The present invention relates to the field of mobile communication, more specifically, to a method and user terminal for multi-site multi-user joint transmission, which can not only provide superior system performance gain, but also support MU-MIMO or other suboptimal multi-site cooperation The scheduling and transmission of the scheme has good backward compatibility. Background technique [0002] Coordinated multipoint (CoMP) transmission is a very promising technology in LTE-A (Long Term Evolution-Advanced) communication systems for effectively reducing inter-cell interference (ICI) and improving coverage at high data rates, cell edge throughput and / or Or increase system throughput. Multi-site joint transmission (JT) is one of the CoMP strategies, where data transmission for one or more user terminals (UEs) is shared within a CoMP cooperating set and jointly processed among multiple cells. Channel information of all UEs is acquired and shared throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/00
CPCH04B7/024H04B7/0417H04B7/0452H04B17/24H04B7/0632
Inventor 刘皓李栋宋扬
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD