TMMAC: ATDMA Based Multi-Channel MAC Protocol Using a Single Radio Transreceiver for Mobile Ad Hoc Networks

Abstract

In this paper, we propose amedium access control (MAC) protocol called TMMAC for Mobile Ad Hoc Networks (MANETs). TMMAC requires only a single half-duplex radio transceiver on each node. In addition to explicit frequency negotiation which is adopted by the conventional multi-channel MAC protocols, TMMAC introduces lightweight explicit time negotiation. This two-dimension negotiation enables TMMAC to exploit the advantage of both frequency diversity and TDMA. Performance evaluation results show that TMMAC achieves up to 62% higher communication throughput over the state-of-the-art multichannel MAC protocols for single-transceiver wireless devices. Moreover, through this two-dimension negotiation, TMMAC achieves aggressive power saving by allowing nodes that are not involved in communication to go into doze mode. In addition, broadcast is supported in an effective way in TMMAC. We also study the impact of different interference ranges on TMMAC. Based on that, we propose Differentiated Power TMMAC to improve the performance of TMMAC when the interference range is much larger than the communication range. Differentiated Power TMMAC maintains the significant improvement of TMMAC over the state-of-the-art multi-channel MAC protocols when the interference range is 1.75 times the communication range. Note: Abstract extracted from PDF file via OCR