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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 1, May 2009

Issue on Computer Science

Page(s): 344-348

A New Approach to Improve the Efficiency of Distributed Scheduling in IEEE 802.16 Mesh Networks

S. Lakani, M. Fathy, and H. Ghaffarian

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The recent standard for broadband wireless access networks, IEEE 802.16, which resulted in the development of metropolitan area wireless networks, includes two network organization modes: Point to Multi Point and Mesh. The mesh mode provides distributed channel access operations of peering nodes and uses TDMA technique for channel access modulation. According to IEEE 802.16 MAC protocol, there are two scheduling algorithms for assigning TDMA slots to each network node: centralized and distributed. In distributed scheduling algorithm, network nodes have to transmit scheduling message in order to inform other nodes about their transfer schedule. In this paper a new approach is proposed to improve distributed scheduling efficiency in IEEE 802.16 mesh mode, with respect to network condition in every transferring opportunity. For evaluating the proposed algorithm efficiency, several extensive simulations are performed in various network configurations and the most important system parameters which affect the network performance are analyzed.

Index Terms

IEEE 802.16, WiMAX, Wireless Mesh Networks, MAC protocol, Time Division Multiple Access, Distributed scheduling procedure

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