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A TDD transmission method, a related base station and a user device

A technology of user equipment and transmission method, which is applied in the field of cellular mobile communication, can solve the problem that CQI feedback cannot support transparent MIMO and/or CoMP operation, and achieve considerable performance gain

Inactive Publication Date: 2014-03-12
SHARP KK
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Problems solved by technology

[0010] According to the above references, there are at least the following problems in the prior art: in the existing TDD cellular mobile communication system (especially, the TDD cellular mobile communication system formed by small coverage cells), the CQI feedback of the user equipment cannot support transparent MIMO and / or CoMP operation

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  • A TDD transmission method, a related base station and a user device
  • A TDD transmission method, a related base station and a user device
  • A TDD transmission method, a related base station and a user device

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Embodiment Construction

[0029] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to avoid confusing the understanding of the present invention.

[0030] In order to clearly describe the implementation steps of the present invention in detail, some specific embodiments of the present invention are given below, which are applicable to the LTE-Release 12 cellular communication system. It should be noted that the present invention is not limited to the applications described in the embodiments, but is applicable to other communication systems, such as LTE systems after LTE-Release 12. Correspondingly, the names of technical terms mentioned in this article may also change with version changes.

[0031] First, refer to figure 1 , generally describe the TDD transmission method according to the present invention. It should be ...

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Abstract

The invention provides a time division duplex (TDD) transmission method and a base station and a user device which both support the method. The method comprises the following steps: channel estimation is carried out by a base station on a down link from the base station to a user device; the base station establishes a precoder aiming at the user device according to an estimated down link channel; the base station sends a channel quality indication reference signaling (CQI-RS) which has been subjected to precoding by the precoder to the user device, and sends indication information in first physical down link control channel (PDCCH) and / or an enhanced physical down link control channel (ePDCCH); the indication information indicates information needed by the user device in detecting the pre-coded CQI-RS; the user device detects the pre-coded CQI-RS, and the corresponding CQI is exported; and the user device gives a feedback of the exported CQI to the base station on a PUCCH. The beneficial effects of the technical scheme of the present invention are that: advanced multi-user multiple-input-multiple-output (MU-MIMO) and / or coordinated multi-point (CoMP) operation can be supported, and the feedback of the CQI can be accurately and timely given, so that compared with existing TDD transmission methods, the TDD transmission method of the invention has a considerable performance gain; and the TDD transmission method of the invention is low in signaling cost and simple to realize.

Description

technical field [0001] The present invention relates to the technical field of cellular mobile communication, more specifically, to a time division duplex (TDD) transmission method and a base station (BS) and user equipment (UE) supporting the method. Background technique [0002] In recent years, the TDD transmission technology under the agreement framework of the Third Generation Partnership Project (3GPP) has received extensive attention and in-depth research. Hereinafter, references 1 to 7 are cited to briefly describe the latest research conclusions of Long Term Evolution (LTE) TDD. [0003] First, reference 1 (RWS-120045, Summary of 3GPP TSG-RAN Workshop on Release 12 and Onward, 3GPP Workshop on Release 12 Onward, Ljubljana, Slovenia, June 11-12, 2012) establishes: small Coverage cells will be the main topic of LTE Release 12 and its subsequent standards; and advanced coordinated multi-point (CoMP) and multiple-input multiple-output (MIMO) processing is one of the ke...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L1/16
Inventor 丁铭刘仁茂
Owner SHARP KK
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