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论文类型：期刊论文

发表时间：2012-09-01

发表刊物：INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS

收录刊物：SCIE、EI、Scopus

卷号：25

期号：9,SI

页面范围：1122-1138

ISSN号：1074-5351

关键字：dynamic channel assignment; wireless mesh network; cross-layer design; routing

摘要：In wireless mesh networks (WMNs), if nonoverlapped channels or partially overlapped channels are used properly, the throughput can be improved drastically. However, the number of nonoverlapped channels is limited in wireless communication standards. An effective channel assignment algorithm for a WMN is necessary to increase the utilization rate of space and nonoverlapped channels. Static channel assignment algorithms can improve network throughput, but their accuracies are not satisfactory in common scenarios. Dynamic channel assignment algorithms can allocate channels according to the status of adjacent links in WMNs. A dynamic channel assignment algorithm needs cross-layer design to get the information of routing. A routing-information-aware channel assignment algorithm based on a cross-layer design is proposed, which is named R-CA. The proposed method can dynamically allocate channels for wireless nodes when they need communication and release channels after data transmission. In R-CA, limited channel resources can be used efficiently by more wireless nodes, and hence the communication throughput can be improved. Simulation results show that our channel allocation strategy can effectively ensure and enhance the network throughput and packet delivery rate in WMNs. Copyright (c) 2012 John Wiley & Sons, Ltd.