Relay Selection Protocol for Cooperative Wireless Networks with Interference

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Relay Selection Protocol for Cooperative Wireless Networks with Interference

更新时间：2025-07-09

- Relay Selection Protocol for Cooperative Wireless Networks with Interference
- Vol. 44, Issue 2, Pages: 72-76(2010)
- 作者机构：
  
  西安电子科技大学综合业务网国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN925
- Online First：10 February 2010，
  
  Published：2010
- 稿件说明：
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Relay Selection Protocol for Cooperative Wireless Networks with Interference[J]. 2010, 44(2): 72-76.
DOI：

Relay Selection Protocol for Cooperative Wireless Networks with Interference[J]. 2010, 44(2): 72-76. DOI：

摘要

针对无线协作网络中共道干扰影响中继选择的问题

提出一种存在干扰的中继选择协议(RSI).该协议以最小化系统中断概率为目标

选择具有最大瞬时端到端信干比的中继节点转发源节点信息

并且在考虑直接传输时

目的节点采用选择合并策略合并直接传输和中继传输

从而充分利用空间分集增益

降低了系统的中断概率.RSI协议不需要中继节点之间交互信息

通过竞争的方式完成数据传输

节省了系统开销

具有较好的实用性.仿真结果表明

在瑞利信道中

当中继节点个数为4、中断概率为10

-2

时

与最大最小中继选择协议相比

RSI协议能够取得约3～4 dB的信噪比增益.

Abstract

A relay selection protocol with interference(RSI)is proposed to solve the problem that co-channel interferences affect the relay selection in cooperative wireless networks. The protocol minimizes the system outage probability

and selects the relay with maximum instantaneous end-to-end signal to interference and noise ratio to forward the source message. Moreover

the selection combining scheme is deployed at the destination to combine the direct transmission and relay transmission when the direct transmission is taken into account. This strategy can make full use of space diversity and decrease the system outage probability. Compared with the existing relay selection protocols

the proposed protocol does not need any information exchange between any two relays

and the data transmission is completed by competition. Thus

the proposed protocol has a low system cost and good practicability. Simulation results

and comparisons with the max-min relay selection protocol show that when the number of relays is 4 and the outage probability is 10

-2

the proposed protocol achieves about 3～4 dB signal to noise ratio gain in Rayleigh fading channels.

关键词

Keywords

references

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