Title :
Opportunistic Relay Selection with a Direct Link
Author :
Abouelseoud, Mohamed ; Nosratinia, Aria
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA
Abstract :
The performance of relay selection in the presence of a direct source-destination link has been an open problem, essentially because a direct link introduces cross-dependencies in the relay selection that significantly complicate its analysis. Thus, the previous studies of relay selection by and large have been forced to assume that the network geometry is such that the direct link is weak enough to be ignored.This paper addresses and solves this open problem. Several relaying protocols are analyzed with relay selection in the high-SNR regime using the diversity-multiplexing tradeoff, including AF, DF, NAF, DDF, and CF. In several cases, simplified selection criteria are developed.
Keywords :
amplify and forward communication; decode and forward communication; protocols; radio networks; AF relay selection; DDF relay selection; DF relay selection; NAF relay selection; amplify-and-forward relay selection; cross-dependencies; decode-and-forward relay selection; direct source-destination link; diversity-multiplexing tradeoff; high-SNR regime; network geometry; opportunistic relay selection; relaying protocols; Equations; Mathematical model; Multiplexing; Mutual information; Random variables; Relays; Upper bound;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE
Conference_Location :
Miami, FL
Print_ISBN :
978-1-4244-5636-9
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2010.5683823
