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Cooperative communication method, equipment and system

A technology of cooperative communication and sending mode, applied in wireless communication, prevention/detection of errors through diversity reception, electrical components, etc., can solve the problems of small signaling overhead, high signaling overhead, high computational complexity, etc., to reduce complexity The effect of reducing signaling overhead

Inactive Publication Date: 2013-10-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the cooperative MIMO system, the performance of the full cooperative scheme is the best, but it is difficult to implement in the actual network due to the high computational complexity, large signaling overhead, and difficulty in synchronizing the base stations.
Among the existing partial cooperation schemes, some can support multiple terminals but have high signaling overhead, and some have small signaling overhead but cannot support multiple mobile terminals at the same time

Method used

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  • Cooperative communication method, equipment and system
  • Cooperative communication method, equipment and system
  • Cooperative communication method, equipment and system

Examples

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Embodiment 1

[0041] An embodiment of the present invention provides a cooperative communication method, such as figure 2 As shown, the method includes:

[0042] 201. Obtain local channel state information and local channel correlation information;

[0043] The base station can obtain local channel state information and local channel correlation information of all mobile terminals within the coverage of the base station through channel estimation or feedback from the mobile terminals. The channel correlation information includes a channel correlation matrix or an antenna correlation coefficient. If the base station collects channel information by itself, the existing channel state collector can be used for channel estimation; otherwise, if the channel information is collected based on the feedback from the mobile terminal, a dedicated uplink feedback channel needs to be established. The channel correlation information may include a channel correlation matrix or an antenna correlation coe...

Embodiment 2

[0063] An embodiment of the present invention provides a base station, such as Figure 4 As shown, the base station includes a channel information collection module 401 , a scheduling instruction acquisition module 402 , a calculation module 403 and a sending module 404 .

[0064] Among them, the channel information collection module 401 is used to obtain local channel state information and local channel correlation information; the scheduling instruction acquisition module 402 is used to obtain scheduling instruction information, and the scheduling instruction information is based on the local channel correlation information and other base station generation of local channel correlation information; the calculation module 403 is used to perform precoding calculation according to the local channel state information and the scheduling instruction information obtained by the scheduling instruction acquisition module; the sending module 404 is used to use the result of the precodi...

Embodiment 3

[0078] An embodiment of the present invention provides a cooperative communication system, such as Image 6 As shown, the system includes a base station 601 and a scheduling control device 602 .

[0079] Wherein, the base station 601 is used to obtain local channel state information and local channel correlation information and send the local channel correlation information to the scheduling control device 602, and then obtain the scheduling instruction information sent by the scheduling control device 602, according to the scheduling Instruction information and local channel state information, perform precoding calculation and send communication data to the served terminal; scheduling control device 602 is used to receive local channel correlation information sent by at least two base stations to form global channel correlation information, according to the Generate scheduling instruction information based on the global channel correlation information and send it to the base ...

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Abstract

The embodiment of the invention provides a cooperative communication method, cooperative communication equipment and a cooperative communication system, belongs to the field of mobile communication, and can lower the expense on a cooperative signaling, lower computation complexity and serve a plurality of mobile terminals. In the technical scheme provided by the embodiment of the invention, the cooperative communication method comprises the following steps of: acquiring local channel state information and local channel correlation information; acquiring scheduling command information which is generated according to the local channel correlation information and local channel correlation information of other base stations; and performing precoding computation according to the scheduling command information and the local channel state information and transmitting communication data to a served terminal. The technical scheme provided by the embodiment of the invention is suitable for a mobile communication system.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method, device and system for cooperative communication. Background technique [0002] In a cooperative MIMO (Multi-input Multi-output) system, in order to cooperate between base stations, the base station collects channel information (such as channel state information and channel correlation information) and sends it to the central control unit. The central control unit decides the transmission scheme according to the channel information of the base station (such as the precoding, code rate, modulation level of each base station, etc.), and then notifies the decision result to each base station. In order to perform base station cooperation, downlink data will be shared among cooperative base stations, that is, each cooperative base station holds downlink transmission data. The channel state information between a base station and all mobile terminals served by it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04W88/08
Inventor 张弓龙毅李云波杨讯王锐刘坚能
Owner HUAWEI TECH CO LTD
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