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An effective scheduling scheme for multi-hop
multicast in wireless mesh networks |
| Zheng LIU,Heng DAI,Farouk ALKADHI,Jufeng DAI, |
| School of Electronic
Information Engineering, Tianjin University, Tianjin 300072, China; |
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Abstract With the utilization of concurrent transmission strategy, a throughput-enhanced scheduling scheme is devised for multicast service in wireless multi-hop mesh networks. Since the performance of a multicast mechanism is constrained in a wireless setting due to the interference among local wireless transmissions, the interference relationships are first characterized by introducing a graph transformation method. Based on the graph transformation, the multicast scheduling problem is converted to the graph coloring problem, and then a capacity greedy algorithm is designed to provide concurrent transmission scheduling so that the demanded multicast transmission rate can be achieved. Moreover, the necessary and sufficient conditions of multicast schedulable feasibility are derived. Through corresponding simulations, it is shown that the proposed strategy can enhance the throughput of wireless multi-hop multicast systems significantly.
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| Keywords
multicast
wireless mesh networks
scheduling
interference
capacity
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Issue Date: 05 March 2010
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