Title :
Energy Efficiency and Goodput Analysis in Two-Way Wireless Relay Networks
Author :
Chen, Qing ; Gursoy, Mustafa Cenk
Author_Institution :
Dept. of Electr. Eng., Univ. of Nebraska-Lincoln, Lincoln, NE, USA
fDate :
July 31 2011-Aug. 4 2011
Abstract :
In this paper, we study two-way relay networks (TWRNs) in which two source nodes exchange their information via a relay node indirectly in Rayleigh fading channels. Both Amplify-and-Forward (AF) and Decode-and-Forward (DF) techniques have been analyzed in the TWRN employing a Markov chain model through which the network operation is described and investigated in depth. Automatic Repeat-reQuest (ARQ) retransmission has been applied to guarantee the successful packet delivery. The bit energy consumption and goodput expressions have been derived as functions of transmission rate in a given AF or DF TWRN. Numerical results are used to identify the optimal transmission rates of which the bit energy consumption is minimized or the goodput is maximized. The network performances are compared in terms of energy and transmission efficiency in AF and DF modes.
Keywords :
Markov processes; Rayleigh channels; amplify and forward communication; automatic repeat request; decode and forward communication; energy conservation; radio networks; Markov chain model; Rayleigh fading channels; amplify-and-forward; automatic repeat-request; bit energy consumption; decode-and-forward; energy efficiency; goodput analysis; goodput expressions; two-way relay networks; two-way wireless relay networks; Automatic repeat request; Broadcasting; Decoding; Energy consumption; Markov processes; Relays; Signal to noise ratio;
Conference_Titel :
Computer Communications and Networks (ICCCN), 2011 Proceedings of 20th International Conference on
Conference_Location :
Maui, HI
Print_ISBN :
978-1-4577-0637-0
DOI :
10.1109/ICCCN.2011.6006276
