Relay Selection Scheme in Cooperative Networks with Amplify-and-Forward Protocol

惠鏸 1; 2; 朱世华 1; 李国兵 1

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Relay Selection Scheme in Cooperative Networks with Amplify-and-Forward Protocol

更新时间：2025-12-08

- Relay Selection Scheme in Cooperative Networks with Amplify-and-Forward Protocol
- Vol. 42, Issue 4, Pages: 450-453(2008)
- 作者机构：
  
  1. 西安交通大学电子与信息工程学院,西安,710049
  2. 西安理工大学自动化与信息工程学院,西安,710048
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN925
- Online First：10 April 2008，
  
  Published：2008
- 稿件说明：
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惠鏸 1, 2, 朱世华 1, et al. Relay Selection Scheme in Cooperative Networks with Amplify-and-Forward Protocol[J]. 2008, 42(4): 450-453.
DOI：

惠鏸 1, 2, 朱世华 1, et al. Relay Selection Scheme in Cooperative Networks with Amplify-and-Forward Protocol[J]. 2008, 42(4): 450-453. DOI：

摘要

针对传统多中继放大转发协作通信网络中所有潜在中继均参与协作

导致系统的低资源利用率问题

提出了一种中继节点选择策略.该策略以最小化系统中断概率为目标

引入了中继节点的选择门限

并据此逐一令低于门限的中继节点不参与协作

将其资源重新分配给其他节点

从而提高系统资源利用率.所提策略运算开销小

且选择门限只与中继节点数、平均信道增益以及当前系统信噪比有关

可在传输开始前事先确定而无需实时更新

从而节省了系统开销.仿真实验表明

与所有潜在中继都参与协作的方法相比

所提策略在中断概率为10

-2

～10

-3

时可获得约3～4 dB的信噪比增益.

Abstract

In order to avoid the resource inefficiency of all-participated cooperations in amplify-and-forward cooperative communication networks

a new relay selection scheme is proposed. A threshold for relay selection is introduced to minimize the outage probability and then relays below the threshold are excluded in turn from the cooperation so that their released resources can be reallocated to other relays to improve resource efficiency. The proposed scheme has low computation complexity and low system cost since the threshold is only determined by the number of the selected relays

the average channel state information and the signal-to-noise ratio

and can be given before transmission starts with no real-time updating. Simulation results show that the proposed relay selection scheme outperforms the conventional schemes in outage behavior.

关键词

Keywords

references

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SENDONARIS A, ERKIP E, AAZHANG B. User cooperation diversity:part II implementation aspects and performance analysis [J]. IEEE Transactions on Communications, 2003, 51(11): 1939-1948.

LANEMAN J N, TSE D N C,WORNELL G W. Cooperative diversity in wireless networks: Efficient protocols and outage behavior [J]. IEEE Transactions on Information Theory, 2004,50(12): 3062-3080.

ANNAVAJJALA R, COSMAN P C, MILSTEIN L B. Statistical channel knowledge-based optimum power allocation for relaying protocols in the high SNR regime [J]. IEEE Journal on Selected Areas in Communications, 2007, 25(2): 292-305.

HAMMERSTROM I, KUHN M, WITTNEBEN A. Impact of relay gain allocation on the performance of cooperative diversity networks [C]∥IEEE Vehicular Technology Conference. Los Angeles, USA: IEEE Vehicular Technology Society, 2004: 1815-1819.

LI Y, VUCETIC B, ZHOU Z, et al. Distributed Adaptive power allocation for wireless relay networks [J]. IEEE Transactions on Wireless Communications, 2007, 6(3): 948-958.

ZHAO Y, ADVE R, LIM T J. Improving amplify-and-forward relay networks: optimal power allocation versus selection [J]. IEEE Transactions on Wireless Communications, 2007, 6(8): 3114-3123.

MADAN R, MEHTA N B, MOLISCH A F, et al. Energy-efficient cooperative relaying over fading channels with simple relay Selection [C]∥IEEE Global Telecommunications Conference. San Francisco, USA: IEEE Communications Society, 2006: 1-6.

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