Competitive MAC Protocol for Azimuth Routing

This document contains a report of our recent work in the area of transmission protocols for large-scale wireless sensor networks. We analyse a sensor network where the nodes do not have any knowledge about the network topology. The nodes are only aware of their own positions and the position of the nearest sink. We propose a MAC protocol that enables each transmitting node to choose its best neighbour to forward a data packet. All the neighbours are competing to become the forwarder using an adaptive time division multiple access scheme. The proposed MAC protocol guarantees that the best neighbour is chosen. The MAC protocol is designed to cooperate with the azimuth routing mechanism, presented during previous COST 2100 meeting in Braunschweig. Computer simulations are also reported that validate the protocol performance and allow choosing the optimal length of the MAC protocol frame.