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Journal of Computer Systems, Networks, and Communications
Volume 2008, Article ID 712126, 10 pages
http://dx.doi.org/10.1155/2008/712126
Research Article

An Efficient Algorithm to Find Broadcast Schedule in Ad Hoc TDMA Networks

Department of Computer Engineering, Kuwait University, P.O. Box 5969, Safat 13060, Kuwait

Received 16 September 2008; Accepted 3 December 2008

Academic Editor: Nidal Nasser

Copyright © 2008 Imtiaz Ahmad et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The broadcast scheduling is of fundamental importance and practical concern for ad hoc network performance measures such as the communication delay and the throughput. The scheduling problem on hand involves determination of a collision-free broadcast schedule with the minimum length TDMA frame and the maximum slot utilization by efficient distribution of slots among stations. The problem is widely known as NP-complete, and diverse heuristic algorithms were reported to solve this problem recently. The intractable nature of the broadcast scheduling problem and its importance in ad hoc TDMA networks necessitates development of more efficient heuristic algorithms. In this paper, we developed a new heuristic approach which employs a tight lower bound derived from the maximal incompatibles and generates a search space from the set of maximal compatibles. The developed algorithm is very efficient and effective in conquering the intractable nature of the broadcast scheduling problem in the sense that it explores complex solution space in smaller CPU time. A comparison with existing techniques for the test examples reported in the literature shows that our algorithm achieves a collision-free broadcast with minimum frame length and the maximum slot utilization in relatively shorter time.