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Journal Articles Computer Networks Year : 2011

A Route-Aware MAC for Wireless Multihop Networks with a Convergecast Traffic Pattern

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Abstract

The MAC layer for multihop wireless networks has drawn considerable research attention in the last few years. We focus here on the wireless multihop networks with a convergecast traffic pattern: the whole traffic is destined to a sink/gateway. We propose first to select a k-tree core, i.e. a sub-tree of the shortest paths to the sink containing exactly k-leaves. In particular, these k-tree core nodes are chosen among the nodes that must forward most traffic. We design C-MAC, an optimized MAC layer for this kind of topology. C-MAC is derived from the CSMA-CA like approaches and consists in giving a larger priority to the k-tree core nodes. Moreover, a proper coordination among the k-tree core nodes permits to limit collisions among them. Simulation results show that organizing the transmissions in C-MAC permits to achieve a much larger throughput than the original IEEE 802.11-like protocol it is based on. This simple solution can be adapted to most CSMA-CA like protocols, and is particularly relevant for WSN or WMN in which traffic is mostly destined to the sink/gateway.
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Dates and versions

hal-02650466 , version 1 (29-05-2020)

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Fabrice Theoleyre. A Route-Aware MAC for Wireless Multihop Networks with a Convergecast Traffic Pattern. Computer Networks, 2011, 55 (3), pp.822-837. ⟨10.1016/j.comnet.2010.10.018⟩. ⟨hal-02650466⟩
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