Analyzing DISH for multi-channel MAC protocols in wireless networks

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 pco in the context of multi-channel multi-hop wireless networks. Second, we verify our analysis via simulations and the results show that our analysis accura...

• Type: Conference
• Year: 2008
• Where: MOBIHOC
• Authors: Tie Luo, Mehul Motani, Vikram Srinivasan
• Keywords: Appropriate Performance Indicator, Ideal Dish, MOBIHOC 2008, Real Dish, Wireless Networks