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

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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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 coding technology to Solve the problem of low uplink transmission efficiency of the relay; and when the user is located at the edge of the cell, the method can improve its transmission performance and increase the coverage of the base station in the entire cell; the method includes the following steps:

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