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Network coding-based cooperative relay transmission method

A technology of network coding and cooperative relay, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as insufficient spectrum utilization efficiency, insufficient spectrum utilization of the system, and insufficient exploitation of cooperative diversity gain

Inactive Publication Date: 2011-07-27
TSINGHUA UNIV +1
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Problems solved by technology

[0005] The system spectrum utilization rate of the existing cooperative relay transmission scheme is not sufficient, because in the existing cooperative relay transmission scheme, although the introduction of the relay improves the reliability and effectiveness of the transmission, however, in the half-duplex mode , the forwarding of the relay needs to occupy an additional time slot to complete, so the spectrum utilization efficiency is not sufficient, and the potential cooperative diversity gain is not fully exploited

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  • Network coding-based cooperative relay transmission method
  • Network coding-based cooperative relay transmission method
  • Network coding-based cooperative relay transmission method

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] Such as figure 2 , 3 shown, and refer to figure 1 In the flow chart, the source node involved in this embodiment is S, the relay nodes are R1 and R2, and the destination nodes are A and B. Assume that the information S wants to send to A is a, and the information to be sent to B is b. The proposed cooperative relay scheme will complete the transmission of information from S to A and B in two time slots, specifically including the following steps:

[0025] S1 and S perform two encoding operations on a and b, assuming two operations of "+" and "-", and obtain two results of a+b and a-b respectively ( image 3 middle(a));

[0026] S2, using two orthogonal sub-chann...

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Abstract

The invention discloses a network coding-based cooperative relay transmission method, which comprises the following steps that: 1, a source node performs n different network coding operations on information to be transmitted to obtain n different coding signals; 2, the source node transmits the n different coding signals to m relay nodes by utilizing m sub-channels respectively, and simultaneously transmits the information to be transmitted to k destination nodes by utilizing the other k sub-channels; and 3, the m relay nodes perform de-noising processing on the received n different coding signals respectively, and forward the de-noised coding signals to the k destination nodes respectively, and the k destination nodes perform decoding operations and signal combination processing after receiving the totally n+1 paths of signals from the source node and the m relay nodes to obtain own received information. By the network coding-based cooperative relay transmission method, the transmission diversity gain is increased, the fading of wireless channels can be effectively resisted, the information transmission quality can be further improved, the transmission reliability of a system is improved and the spectrum utilization rate of the system is increased.

Description

technical field [0001] The invention relates to the technical field of network coding and cooperative relay, in particular to a network coding-based cooperative relay transmission method. Background technique [0002] The relay technology is to introduce a relay node between the source node and the destination node of the communication. The information sent by the source node to the destination node can be transmitted on the direct link between the source and the destination on the one hand, and can be transmitted through the relay node on the other hand. Perform relay forwarding to the destination node. Relay technology has a wide range of applications in wireless communication, such as satellite communication, cellular communication, wireless mesh network, etc., can use relay transmission technology to improve the transmission performance of the system. [0003] Cooperative relay, also known as cooperative diversity, is an extension of single-path relay. It introduces one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06
Inventor 熊轲樊平毅易粟雷鸣
Owner TSINGHUA UNIV
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