Asymptotic energy efficiency analysis for the state-of-the-art relaying protocols  

作　　者：WANG Yu-ning ZHANG Jian-hua XU Wei 

机构地区：[1]Key Lab of Universal Wireless Communications, Ministry of Education, Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2011年第6期8-13,共6页中国邮电高校学报（英文版）

基　　金：supported by China Important National Science and Technology Specific Projects (2009ZX03007-003-01);Sino-Finland International Cooperation Program of MOST (2010DFB10410)

摘　　要：This article analyzes the energy-efficiency performances of fixed relaying schemes, selection relaying schemes and incremental relaying schemes in the three-node relay network. The closed-form asymptotic energy per good-bit （EPG） expressions for the state-of-the-art relaying protocols at high signal-to-noise ratio （SNR） regime are derived. In the formulation of the energy consumption model, the transmission, circuit and retransmission energies are all taken into account. To facilitate the comparison of energy-efficiency performances between different relaying protocols, the link reliabilities and retransmission probabilities are determined by the asymptotic outage probabilities at high SNR regime under the Rayleigh fading assumption. Computer simulations are carried out in both symmetric and asymmetric relay networks. The simulation results show the differences of system energy expenditure between these state-of-the-art relaying protocols. Finally some practical implications can be made from the observation.This article analyzes the energy-efficiency performances of fixed relaying schemes, selection relaying schemes and incremental relaying schemes in the three-node relay network. The closed-form asymptotic energy per good-bit （EPG） expressions for the state-of-the-art relaying protocols at high signal-to-noise ratio （SNR） regime are derived. In the formulation of the energy consumption model, the transmission, circuit and retransmission energies are all taken into account. To facilitate the comparison of energy-efficiency performances between different relaying protocols, the link reliabilities and retransmission probabilities are determined by the asymptotic outage probabilities at high SNR regime under the Rayleigh fading assumption. Computer simulations are carried out in both symmetric and asymmetric relay networks. The simulation results show the differences of system energy expenditure between these state-of-the-art relaying protocols. Finally some practical implications can be made from the observation.

关 键 词：green communication EPG RELAY ENERGY-EFFICIENCY outage probability 

分 类 号：TN93[电子电信—信号与信息处理] TK018[电子电信—信息与通信工程]