Energy efficient broadcast is indispensable for many applications in wireless ad hoc networks. It has been proved that network coding has great potential to improve performance in terms of energy consumption in wireless ad hoc networks. However, the power of network coding depends on the availability of coding opportunities, which in turns depends on how routing paths are established. It is thus beneficial to establish paths in such a way that more coding opportunities are created. By combining network coding and connected dominating set (CDS), we explore energy minimal broadcast protocols in wireless ad hoc networks. The rationale behind this combination is that CDS provides better chances for data flows to intersect, which means more coding opportunities. We design a scheme, named NCDS, that uses network coding over connected dominating set, to reduce energy consumption. Analysis and experimental results show that NCDS outperforms broadcast algorithms that use CDS or network coding alone.
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Acknowledgments This work was supported in part by the National Natural Science Foundation of China and Microsoft Research Asia under Grant 60933012; by the National Natural Science Foundation of China under Grant 61073147 and Grant 61271226; by the Fundamental Research Funds for the Central Universities under Grant 2011QN014; by the National Natural Science Foundation of Hubei Province under Grant 2011CDB044; by the CHUTIAN Scholar Project of Hubei Province; by the Youth Chenguang Project of Wuhan City under Grant 201050231080; by the Scientific Research Foundation for the Returned Overseas Chinese Scholars (State Education Ministry); and by the Program for New Century Excellent Talents in University under Grant NCET-10-408 (State Education Ministry). Dr. Guang Tan’s work was supported by the National Natural Science Foundation of China under Grant 61103243.
- Connected dominating set
- Energy efficient broadcast
- Network coding
- Wireless ad hoc networks