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DIALM '99 Proceedings of the 3rd international workshop on Discrete algorithms and methods for mobile computing and communications
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A Strahler bijection between Dyck paths and planar trees
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Minimizing broadcast latency and redundancy in ad hoc networks
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WASA '09 Proceedings of the 4th International Conference on Wireless Algorithms, Systems, and Applications
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ICC'09 Proceedings of the 2009 IEEE international conference on Communications
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Chorus: collision resolution for efficient wireless broadcast
INFOCOM'10 Proceedings of the 29th conference on Information communications
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Interference-aware broadcast scheduling in wireless networks
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Theoretical Computer Science
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Broadcast scheduling is a fundamental problem in wireless ad hoc networks. The objective of a broadcast schedule is to deliver a message from a given source to all other nodes in a minimum amount of time. At the same time, in order for the broadcast to proceed as predicted in the schedule, it must not contain parallel transmissions which can be conflicting based on the collision and interference parameters in the wireless network. Most existing work on this problem use a limited network model which accounts only for conflicts occurring inside the transmission ranges of the nodes. The broadcast schedules produced by these algorithms are likely to experience unpredictable delays when deployed in the network. This is because they do not take into consideration other important sources of conflict in parallel transmissions, namely the interference range and the carrier sensing range. In this paper we develop a conflict-aware network model, which uses these parameters to increase the probability of scheduling conflict-free transmissions, and thereby improve the reliability of the broadcast schedule. We present and prove correctness of a constant approximation algorithm for minimum-latency broadcast scheduling under this network model. We also present a greedy heuristic algorithm for the same problem. Experimental results are provided to evaluate the performance of our algorithms. In addition, the algorithms are analyzed to justify their performance trends.