An analytical model for ARQ cooperative diversity in multi-hop wireless networks

Authors:
Long Le;E. Hossain
Affiliations:
Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON;-
Venue:
IEEE Transactions on Wireless Communications - Part 2
Year:
2008

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Abstract

This paper presents an analytical model for a general automatic repeat request (ARQ) cooperative diversity (ACD) scheme in cluster-based multi-hop wireless networks. For the considered ACD scheme, transmission in each hop is supported by a number of relays using a finite number of transmission rounds. While prior works in the literature mostly focused on simulation and/or information theoretic analysis, we instead develop a model to analyze end-to-end performance in terms of probability of end-to-end delivery failure, end-to-end delay distribution, and end-to-end throughput. The application of the proposed analytical model for a transmission scheme which employs jointly a truncated ARQ protocol and a maximal ratio combiner is illustrated. Numerical results validate the proposed analytical model and compare the ACD scheme with the Amplify-and-Forward (AF) and traditional truncated ARQ schemes in a linear network. The ACD scheme exploiting both time diversity (through retransmission) and spatial diversity is shown to have several desirable adaptive characteristics compared to other schemes.