Title :
A joint adaptive packet size and modulation scheme combined with SR-ARQ over correlated fading channels
Author :
Xiao, Junfeng ; Qiu, Jing ; Cheng, Shiduan
Author_Institution :
State Key Lab. of Networking & Switching Technol., Beijing Univ. of Posts & Telecommun., China
Abstract :
Conventional adaptive transmission schemes perform poorly in wireless correlated slow-fading channels. In this paper, a joint adaptive packet size and modulation (APSM) scheme combined with selective repeat automatic repeat request (SR-ARQ) is proposed. We apply a multi-state Markov system model for analyzing the performance of APSM/SR-ARQ systems and optimizing the selection of modulation levels and packet sizes in correlated fading channels, which is also described by a finite-state Markov chain. A general closed-form expression of the average throughput for APSM/SR-ARQ is presented. Numerical results show that our adaptive scheme combined with SR-ARQ can obtain a good performance in correlated fading channels.
Keywords :
Markov processes; adaptive modulation; automatic repeat request; fading channels; wireless channels; ARQ; adaptive transmission schemes; closed-form expression; finite-state Markov chain; joint adaptive packet size and modulation; multistate Markov system model; selective repeat automatic repeat request; wireless correlated slow-fading channels; Adaptive systems; Automatic repeat request; Closed-form solution; Fading; Laboratories; Performance analysis; Quality of service; Telecommunication switching; Throughput; Wireless communication;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9335-X
DOI :
10.1109/WCNM.2005.1544080
