Effective Capacity Analysis for Multi-Rate Relay Channels Exploiting Adaptive Cooperative Diversity

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Executive Summary

Aiming at improving the QoS performance over fading channels, this paper presents an analysis of the effective capacity for a relay-assisted communication system which utilizes a cooperative packet retransmission protocol at the link-layer in conjunction with AMC-based multi-rate transmission at the physical layer. In the considered model, a Source (S) node employs AMC to transmit delay-constrained packet traffic to the Destination (D) node. To achieve adaptive cooperative diversity, a relay node, also equipped with AMC, forwards the packet received from node S to node D if it was able to decode the source packet correctly and node D requested a packet retransmission.

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