LiT MAC: Addressing the Challenges of Effective Voice Communication in a Low Cost, Low Power Wireless Mesh Network

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Executive Summary

In this paper, the authors consider the goal of enabling a local voice communication system, within a village, using a low cost and low power wireless mesh network. The design of an appropriate MAC is a major challenge in this context. Towards this goal, they present LiT: a full-fledged TDMA-based MAC protocol for real-time applications over such networks. They showcase the practicality of such a system through implementation-based evaluation of LiT on an inexpensive, low power 802.15.4 platform. While there is plentiful literature on the use of TDMA for wireless mesh networks, a practical multi-hop TDMA system remains elusive. In this regard, LiT addresses several practical concerns.

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