Title :
Spectrum and energy efficiency in two-way multi-relay networks with selective relaying
Author :
Qing Chen ; Gursoy, M. Cenk
Author_Institution :
Dept. of Electr. Eng., Univ. of Nebraska-Lincoln, Lincoln, NE, USA
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
In this paper, we study two-way multi-relay networks (TWMRNs) in which two nodes exchange information indirectly via an optimal relay node in Rayleigh fading channels. An amplify-and-forward (AF) scheme has been employed and the network mechanism is investigated in depth using a Markov chain model. Automatic Repeat-reQuest (ARQ) retransmission has been applied to guarantee successful packet delivery. The bit energy consumption and goodput are analyzed as functions of the signal-to-noise ratio and transmission rate. Through numerical results, it is demonstrated that selective relaying in TWMRNs can potentially increase the network reliability and achieve higher spectrum and energy efficiency than two-way networks with a single relay.
Keywords :
Markov processes; Rayleigh channels; amplify and forward communication; automatic repeat request; relay networks (telecommunication); AF scheme; ARQ retransmission; Markov chain model; Rayleigh fading channel; TWMRN; amplify-and-forward scheme; automatic repeat-request transmission; bit energy consumption; energy efficiency; network reliability; optimal relay node; packet delivery; selective relaying; signal-to-noise ratio; spectrum efficiency; transmission rate; two-way multirelay network; Automatic repeat request; Energy consumption; Fading; Markov processes; Relays; Reliability; Signal to noise ratio;
Conference_Titel :
MILITARY COMMUNICATIONS CONFERENCE, 2012 - MILCOM 2012
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-1729-0
DOI :
10.1109/MILCOM.2012.6415859
