Opportunistic scheduling for wireless network coding

Authors:
Hiroyuki Yomo;Petar Popovski
Affiliations:
Advanced Telecommunications Research Institute International, Japan and Department of Electronic Systems, Aalborg University, Denmark;Department of Electronic Systems, Aalborg University and Oticon A/S, Denmark
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

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Abstract

This letter addresses a scheduling problem for wireless network coding (WNC). In our previous work, we have theoretically shown that the optimum number of nodes to be included into a network-coded packet as well as its transmission rate depends on time-varying link condition between a transmitting node and receiving nodes [1]. Based on this observation, this letter designs practical scheme which opportunistically selects scheduled nodes, packets to be coded and an employed modulation level according to time-varying channel conditions and packet length. The numerical results show that the proposed opportunistic scheduling can improve the overall throughput as compared with non-opportunistic approach.