Method for carrying out grouping cooperative communication on multiple users based on network encoding technology

A technology of network coding and cooperative communication, which is applied in the field of cooperative communication, can solve the problems of low transmission efficiency, and achieve the effect of simple operation steps, promising promotion and application prospects, and easy realization

Inactive Publication Date: 2010-09-15
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0006] In order to achieve the purpose of the above invention, the present invention provides a method for grouping cooperative communication of multiple users based on network coding technology in a cellular relay network, which is characterized in that: grouping multiple users, and combining network

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  • Method for carrying out grouping cooperative communication on multiple users based on network encoding technology
  • Method for carrying out grouping cooperative communication on multiple users based on network encoding technology
  • Method for carrying out grouping cooperative communication on multiple users based on network encoding technology

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Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] see figure 1 , which introduces a schematic diagram of a communication system in which each relay node in a cellular relay cell uses network coding technology for wireless transmission. The six relay nodes R1~R6 in the figure are all equipped with the network coding function. Through the feedback information of the base station BS, these relay nodes control the data sent by the user to be directly relayed and forwarded, or the relay nodes are transmitted in the form of packets. Network encode and forward. Especially in the case of multiple user access, in each relay serving cell, the base station BS selects different channel state information (indicated by different lines in the figure) according to the channel state information of the uplink channel esti...

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Abstract

The invention relates to a method for carrying out grouping cooperative communication on multiple users based on network encoding technology, which means that grouping is carried out on the multiple users in a special grouping way in a cellular relay network; then, each group of user data is encoded and transmitted by a relay node through the network encoding technology, so that the relay transmission efficiency is improved, and the problem of low relay upstream transmission efficiency can be solved; and when the user is positioned at the edge of a subdistrict, the method can improve the transmission performance, and the coverage range of a base station in the whole subdistrict is enlarged. The method comprises the operation steps of: setting the functions of the relay node in an initialized way, channel estimation and base station selection, judgment of a cooperative partner, grouping transmission executed by the user and self-adaptive centralized control executed by the base station. The method fully utilizes the channel characteristics of cellular cell users, and can be used for grouping the multiple users, thus practically improving the relay transmission efficiency and the transmission performance of the edge user, and reducing the outage probability of the system.

Description

technical field [0001] The invention relates to a method for realizing multi-user packet transmission in a cellular relay network, specifically, a method for multi-user group cooperative communication based on network coding technology. Aiming at a cellular mobile relay system with limited resources, the method improves resource utilization and transmission performance of an uplink communication system, and belongs to the technical field of cooperative communication in wireless communication. Background technique [0002] The bandwidth resources and power resources of the wireless communication system are very limited, and the system spectrum utilization rate at the cell edge is very low. The most common solution is to use relay technology. In each cell, some switching nodes with specific signal processing functions, that is, relay nodes, are set up between the base station and the cell edge users. The setting of relay nodes can not only help cell edge users forward data, ...

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Application Information

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IPC IPC(8): H04W16/18H04B7/14H04L1/06H04L1/00
Inventor 王晓湘张佳张鸿涛王玉龙李松赵渊
Owner BEIJING UNIV OF POSTS & TELECOMM
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