Energy-Efficient Multicasting Over the Erasure Channel

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The authors consider the problem of multicasting from a single source to multiple destinations over the erasure channel. They are interested in energy efficient communication. Their performance metric is the number of bits sent per joule of energy spent until a finite amount of packets is delivered from the source to all the destinations. They compare the performance of Random Linear Network Coding (RLNC) and Automatic Repeat reQuest (ARQ) with respect to the above performance metric. Their numerical results illustrate that RLNC is more energy efficient than ARQ when the unreliability of links is high.