期刊名称：International Journal of Computer Networks & Communications
印刷版ISSN：0975-2293
电子版ISSN：0974-9322
出版年度：2016
卷号：8
期号：3
页码：195
DOI：10.5121/ijcnc.2016.8314
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：This paper analyzes the efficiency of a joint-design of an adaptive modulation and coding (AMC) at thephysical (PHY) layer with an adaptive Rmax-truncated selective-repeat automatic repeat request (ARQ)protocol at the medium access control (MAC) layer to maximize the throughput of cooperative nonregenerativerelay networks under prescribed delay and/or error performance constraints. Particularly, wegeneralize the existing design model/results for cross-layer combining of AMC along with truncated ARQin non-cooperative diversity networks in three-folds: (i) extension of the cross-layer PHY/MAC design oroptimization to cooperative diversity systems; (ii) generalization/unification of analytical expressions forvarious network performance metrics to generalized block fading channels with independent but nonidenticallydistributed (i.n.d) fading statistics among the spatially distributed nodes; (iii) analysis of theeffectiveness of joint-adaptation of the maximum retransmission limit Rmax of ARQ protocol andcooperative diversity order N for delay-insensitive applications. Our insightful numerical results revealthat the average throughput can be increased significantly by judiciously combining two additional degreesof freedom (N and Rmax) that are available in cooperative amplify-and-forward (CAF) relay networksbesides employing AMC at the PHY layer, especially in the most challenging low signal-to-noise ratio(SNR) regime.
