An auxiliary tone based MAC scheme for high density ad hoc networks with directional antennas

Authors:
R. Rahimi;G. Dadashzadeh;E. Jedari;M. Maleki
Affiliations:
Faculty of Engineering Department, Shahed University, Tehran, Iran;Faculty of Engineering Department, Shahed University, Tehran, Iran;Iran Telecom. Research Center, Tehran, Iran;Iran Telecom. Research Center, Tehran, Iran
Venue:
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
Year:
2009

Citing 3
Cited 0

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Deafness: A MAC Problem in Ad Hoc Networks when using Directional Antennas

ICNP '04 Proceedings of the 12th IEEE International Conference on Network Protocols

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Abstract

Using directional antennas in wireless ad hoc networks offers many benefits. However, utilizing this antennas with IEEE 802.11 MAC protocol which is introduced for omni-directional antennas can cause new problems like hidden node, exposed node and deafness problems. In this paper we propose an Auxiliary Tone-Based DMAC (ATB-DMAC) scheme to tackle all of these problems and give an analytical model for the performance of new scheme. In spite of the majority of last approaches, ours does not need any prior information about neighbors' locations. We compare the analytical results for two directional MAC schemes. The evaluation results show that ATB-DMAC outperforms the RTS/CTS based directional MAC in high density networks. Also the new scheme performs better than the latter in networks with high probability of transmission.