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Method and device for carrying out MU-MIMO under time duplex mode

A time division duplex, mode technology, applied in diversity/multi-antenna system, shaping network in transmitter/receiver, digital transmission system, etc., to achieve the effect of reducing network construction cost and cost

Active Publication Date: 2009-09-30
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0026] In view of this, the present invention provides a method and device for performing MU-MIMO in TDD mode, so as to solve a series of problems caused by the prior art based on the codebook

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  • Method and device for carrying out MU-MIMO under time duplex mode
  • Method and device for carrying out MU-MIMO under time duplex mode
  • Method and device for carrying out MU-MIMO under time duplex mode

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Embodiment Construction

[0055] In order to fundamentally solve a series of problems such as the above-mentioned problems caused by the MU-MIMO based on the codebook, the present invention provides a new solution. In order to enable those skilled in the art to better understand the solution, the following will be combined with the accompanying drawings Describe in detail with examples.

[0056] Please refer to image 3 , is a flow chart of an embodiment of a method for performing MU-MIMO in time division duplex mode according to the present invention.

[0057] Suppose there are U UEs in the coverage area of ​​the BS, and each UE is set with M i , can receive M i data streams; BS has N antennas, then the number of UEs B of MU-MIMO satisfies the following relationship:

[0058] Σ i = 1 B M i ≤ N .

[0059] Follow the steps below for MU-...

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Abstract

The invention discloses a method for carrying out MU-MIMO under time duplex mode, comprising the steps of receiving uplink channel measuring pilot emitted by each user equipment in a domination area,; measuring uplink channel state information of each UE according to the uplink channel measuring pilot; determining a target UE group from all UEs according to the uplink channel state information and a first predetermined rule; generating precoding vector of each UE in the target UE group according to a second predetermined rule; and multiplying data stream and corresponding precoding vector of each UE in the target UE group. The invention also discloses a device for realizing the method. The embodiment of the invention sufficiently utilizes the symmetry of an upper channel and a lower channel under a TDD mode and transfers the original operation of UE processing to a BS side so as to avoid a series of problems caused by the mode based on codebook design.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, and more specifically, relates to a method for performing MU-MIMO (Multiple Use-Multpleinput Multple Output, multi-user multi-input multi-output) in a TDD (TimeDivision Duplex) mode and device. Background technique [0002] Future mobile communication systems are developing in the direction of large broadband, high capacity, high availability and high reliability. As an effective means to increase capacity, MIMO technology is widely used in mobile communication systems designed for the future, such as LTE (Long Term Evolution, long-term evolution), WIMAX (Worldwide Interoperability for Microwave Access), B3G (Beyond Third Generation inmobile communication system, B3G mobile communication system)  …. [0003] MU-MIMO in MIMO technology can multiplex multiple users on the same time-frequency resource, and utilize the diversity of multiple users to make the system capacity inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/02H04B1/707H04L1/00H04L25/03
Inventor 侯云哲孙韶辉陈文洪吴群英
Owner DATANG MOBILE COMM EQUIP CO LTD
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