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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Efficient Wireless Broadcasting Using Onion Decoding
verfasst von : Pei Wang, Qunfeng Dong, Mingjun Xiao, Liusheng Huang
Erschienen in: Wireless Algorithms, Systems, and Applications
Verlag: Springer Berlin Heidelberg
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The broadcast nature of wireless transmissions is a two-edged sword for wireless broadcasting. On one hand, it makes broadcasting much more efficient; on the other hand, it causes concurrent transmissions much more likely to collide, deteriorating throughput and delay. In this paper, we propose a novel PHY layer technique called
onion decoding
, which enables correct decoding of two or more colliding transmissions. Thus, more concurrent transmissions can be scheduled, leading to improved throughput and delay. As we shall see in the paper, achieving optimal broadcast throughput and delay, with and without onion decoding, are non-trivial in multi-rate wireless networks. No efficient algorithm is known. We propose a simple heuristic algorithm for wireless broadcasting using onion decoding, and evaluate its performance through simulations. Simulation results confirm that onion decoding can significantly improve throughput and delay of wireless broadcasting.