Joint adaptive modulation-coding and cooperative ARQ for wireless relay networks

Abstract

Abstract-This paper presents a cross-layer approach to jointly design adaptive modulation and coding (AMC) at the physical layer and cooperative truncated automatic repeat request (ARQ) protocol at the data link layer. We first derive an exact closed form expression for the spectral efficiency of the proposed joint AMC-cooperative ARQ scheme. Aiming at maximizing this system performance measure, we then optimize an AMC scheme which directly satisfies a prescribed packet loss rate constraint at the data-link layer. The results indicate that utilizing cooperative ARQ as a retransmission strategy, noticeably enhances the spectral efficiency compared with the system that employs AMC alone at the physical layer. Moreover, the proposed adaptive rate cooperative ARQ scheme outperforms the fixed rate counterpart when the transmission modes at the source and relay are chosen based on the channel statistics. This in turn quantifies the possible gain achieved by joint design of AMC and ARQ in wireless relay networks.Index Terms-Adaptive modulation and coding, cooperative ARQ, quality of service, cross-layer design.

Multi-Hop Diversity Aided Multi-Hop Communications: A Cumulative Distribution Function Aware Approach

“…These advantages may typically include an improved link performance, quantified in terms of energy-efficiency and extended coverage, enhanced throughput, simplicity and flexibility of network planning, etc [1][2][3]. Hence, multihop networks have attracted much attention, as evidenced by [1][2][3][4][5][6][7][8][9][10][11] and the references therein.…”

“…As a result, the route's BER and outage performance of a MHL typically degrades or remains the same in the best case, as the number of hops increases. In order to improve the performance of MHLs, novel signaling schemes have been proposed [1,3,12], which require the nodes to have a store-and-wait capability. For example, in [1,12], adaptive modulation and coding (AMC) combined with automatic repeat request (ARQ) schemes has been invoked in cooperative decode-and-forward (DF) communications.…”

“…In order to improve the performance of MHLs, novel signaling schemes have been proposed [1,3,12], which require the nodes to have a store-and-wait capability. For example, in [1,12], adaptive modulation and coding (AMC) combined with automatic repeat request (ARQ) schemes has been invoked in cooperative decode-and-forward (DF) communications. Recently, the authors of [3] have employed AMC for dual-hop cooperative communications relying on a regenerative RN, where the AMC mode of both the hops may be configured independently.…”

Multihop Diversity for Fading Mitigation in Multihop Wireless Networks

“…As a result, the route error/outage performance of a multihop link usually degrades, as the number of hops increases. In order to improve the performance of multihop links, recently, novel signaling schemes have been proposed [1,5,6], which require the nodes to have a store-and-wait capability. For example, in [5,6], adaptive modulation and coding (AMC) combined with automatic repeat request (ARQ) schemes has been invoked in cooperative decode-and-forward (DF) communications.…”

“…In order to improve the performance of multihop links, recently, novel signaling schemes have been proposed [1,5,6], which require the nodes to have a store-and-wait capability. For example, in [5,6], adaptive modulation and coding (AMC) combined with automatic repeat request (ARQ) schemes has been invoked in cooperative decode-and-forward (DF) communications. Very recently, the authors in [1] have employed AMC for dual-hop cooperative communications relying on a regenerative relay node, where the AMC mode of both the hops may be configured independently.…”