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Title: Analyzing DISH for multi-channel MAC protocols in wireless networks
Authors: Luo, T. 
Motani, M. 
Srinivasan, V.
Keywords: Cooperative communication
Distributed information sharing
Issue Date: 2008
Citation: Luo, T.,Motani, M.,Srinivasan, V. (2008). Analyzing DISH for multi-channel MAC protocols in wireless networks. Proceedings of the International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc) : 43-52. ScholarBank@NUS Repository.
Abstract: For long, node cooperation has been exploited as a data relaying mechanism. However, the wireless channel allows for much richer interaction between nodes. One such scenario is in a multi-channel environment, where transmitter-receiver pairs may make incorrect decisions (e.g., in selecting channels) but idle neighbors could help by sharing information to prevent undesirable consequences (e.g., data collisions). This represents a Distributed Information SHaring (DISH) mechanism for cooperation and suggests new ways of designing cooperative protocols. However, what is lacking is a theoretical understanding of this new notion of cooperation. In this paper, we view cooperation as a network resource and evaluate the availability of cooperation via a metric, pco, the probability of obtaining cooperation. First, we analytically evaluate p co in the context of multi-channel multi-hop wireless networks. Second, we verify our analysis via simulations and the results show that our analysis accurately characterizes the behavior of pco as a function of underlying network parameters. This step also yields important insights into DISH with respect to network dynamics. Third, we investigate the correlation between pco and network performance in terms of collision rate, packet delay, and throughput. The results indicate a near-linear relationship, which may significantly simplify performance analysis for cooperative networks and suggests that Pco be used as an appropriate performance indicator itself. Throughout this work, we utilize, as appropriate, three different DISH contexts - model-based DISH, ideal DISH, and real DISH - to explore p no. Copyright 2008 ACM.
Source Title: Proceedings of the International Symposium on Mobile Ad Hoc Networking and Computing (MobiHoc)
ISBN: 9781605580739
DOI: 10.1145/1374618.1374626
Appears in Collections:Staff Publications

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