A Dual-Tone DMAC Protocol for Mobile Ad Hoc Networks

Sang-Bo KO  Jeong-Woo JWA  

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.2    pp.354-357
Publication Date: 2007/02/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.2.354
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Network
ad hoc network,  medium access control (MAC),  dual-tone,  directional antennas,  

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Ad hoc DMAC protocols have been proposed to improve spatial reuse, but directional transmissions have the problem of deafness. In the ToneDMAC protocol [9], an omnidirectional out-of-band tone after transmitting DATA or ACK mitigates deafness, but cannot prevent the interference packets caused by retransmissions to node in deafness. In this paper, we propose a dual-tone DMAC protocol with the out-of-band start-tone and stop-tone. In the proposed MAC protocol, a start-tone prevents retransmissions to node in deafness and decreases the packet collision probability. Throughput performance of the proposed MAC protocol is confirmed by simulations using Qualnet ver. 3.8 simulator.