Relay selection from a battery energy efficiency perspective

Wenshu Zhang, Dongliang Duan, Liuqing Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Scopus citations


Relay network is proposed as a means of improving the error performance and energy efficiency of the wireless networks. Inspired by the battery power efficiency (BPE) analysis in [1], relay selection from the battery energy efficiency perspective turns out to be an interesting topic. Under the general network setup which integrates typical transmission and reception modules, we adopt the realistic nonlinear battery model, extend the BPE results in [1] to relay network over Rayleigh fading channels, investigate the optimum and suboptimum energy allocation solutions for the relaying transmission, and finally establish the relay selection criterion from the battery energy efficiency point of view. Both the theoretical derivation and numerical results show that, subject to the same average bit error rate (BER) performance constraint, relaying does not necessarily increase the system energy efficiency, but is a possible alternative of the direct transmission depending on the relaying situation. Additionally, we prove that the two relaying protocols Decode and Forward (DF) and Amplify and Forward (AF) are equivalent for relay selection over Rayleigh fading channels at high SNR.

Original languageEnglish (US)
Title of host publicationMILCOM 2009 - 2009 IEEE Military Communications Conference
StatePublished - 2009
Externally publishedYes
Event2009 IEEE Military Communications Conference, MILCOM 2009 - Boston, MA, United States
Duration: Oct 18 2009Oct 21 2009

Publication series

NameProceedings - IEEE Military Communications Conference MILCOM


Other2009 IEEE Military Communications Conference, MILCOM 2009
CountryUnited States
CityBoston, MA

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