Title :
Delays analysis of Cooperative truncated HARQ with opportunistic relaying and noisy feedback
Author_Institution :
TECHTRA Res. Unit, Higher Sch. of Commun. of Tunis, Tunis, Tunisia
Abstract :
In this paper, we evaluate the delay experienced by Poisson arriving packets for Cooperative truncated HARQ with opportunistic relaying in the presence of a noisy feedback channel. We derive the theoretical expressions of the expected waiting time and the packet´s sojourn time in the queue of truncated opportunistic cooperativeARQ and Hybrid ARQ I, with and without Packet Combining (PC), and Hybrid ARQ II with Code Combining (CC). The analysis is valid for any number of relays for both Amplify and Forward (AF) and Decode and Forward (DF) relaying strategies and Nakagami-m fading channels. The results indicate a significant improvement of packet delivery delays when compared to the absence of cooperation. Besides, we show that the effects of the noisy feedback can be reduced by coding the ACK message.
Keywords :
Nakagami channels; automatic repeat request; cooperative communication; ACK message; Nakagami-m fading channel; Poisson arriving packet; code combining; cooperative truncated HARQ; delay analysis; noisy feedback channel; opportunistic relaying; packet combining; packet delivery delay; truncated opportunistic cooperative ARQ; Automatic repeat request; Delay; Fading; Noise measurement; Protocols; Relays; Signal to noise ratio; HARQ; Nakagami-m channel; cooperative communications; opportunistic relaying;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on
Conference_Location :
Instanbul
Print_ISBN :
978-1-4244-8017-3
DOI :
10.1109/PIMRC.2010.5672052
