A Smart Channel Selection Strategy for Multi-rate Multi-channel MAC Protocol

概要

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The IEEE 802.11 wireless media standard supports multiple transmission rates and frequency channels at the physical layer. By using the multi-rate multi-channel Medium Access Control (MAC) protocol, it can increase the performance of ad hoc networks. However, there is another task for multi-rate multi-channel MAC protocol. That is the channel selection strategy. In this paper we introduce a multi-rate multi-channel MAC protocol with one interface using a smart channel selection strategy. The core idea of our channel selection strategy has two main parts. One is to allow the receiver to select the appropriate rate for data packet transmission during the RTS/CTS exchange. The other part is to allow the receiver to decide a suitable channel selection strategy that is to change the channel after the amount of data packets reaches a threshold. Our channel selection strategy can solve two difficult problems: which transmission rate and channel are used for data packet transmission between source and destinations, and how long transmission rate and channel should be used between the same pair of transmission? We show through computer simulation that our channel selection strategy can provide the lower number of packet losses and the higher throughput of ad hoc network.
2010-08-26