Reliability-based rate allocation in wireless inter-session network coding systems

Authors:
Keivan Ronasi;A. Hamed Mohsenian-Rad;Vincent W. S. Wong;Sathish Gopalakrishnan;Robert Schober
Affiliations:
The University of British Columbia, Vancouver, Canada;The University of British Columbia, Vancouver, Canada;The University of British Columbia, Vancouver, Canada;The University of British Columbia, Vancouver, Canada;The University of British Columbia, Vancouver, Canada
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

Network coding has recently received increasing attention to improve performance and increase capacity in both wired and wireless communication networks. In this paper, we focus on inter-session network coding, where multiple unicast sessions jointly participate in network coding. Wireless links are often unreliable because of varying channel conditions. We consider multi-hop unicast sessions over unreliable links and propose a distributed end-to-end transmission rate adjustment mechanism to maximize the aggregate network utility by taking into account the wireless link reliability information. This includes an elaborate modeling of end-to-end reliability. Simulation results show that by taking into account the reliability information, we can increase the network throughput by up to 100% for some network topologies. We can also increase the aggregate network utility significantly for various choices of utility functions.