A dynamic channel assignment strategy based on cross‐layer design for wireless mesh networks
A dynamic channel assignment strategy based on cross‐layer design for wireless mesh networks
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DOI：
10.1002/dac.2385
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发表时间：
2012-09
影响因子：
2.1
通讯作者：
Weifeng Sun;Tong Fu;Feng Xia;Zhenquan Qin;Rong Cong
中科院分区：
文献类型：
--
作者：
Weifeng Sun;Tong Fu;Feng Xia;Zhenquan Qin;Rong Cong
在无线Mesh网络(WMN)中，如果正确使用非重叠或部分重叠的信道，可以显著提高吞吐量。然而，在无线通信标准中，非重叠信道的数量是有限的。为了提高空间信道和非重叠信道的利用率，需要一种有效的WMN信道分配算法。静态信道分配算法可以提高网络吞吐量，但在常见场景下其精度并不令人满意。动态信道分配算法可以根据WMN中相邻链路的状态进行信道分配。一种动态的信道分配算法需要跨层设计来获取路由信息。提出了一种基于跨层设计的路由信息感知的信道分配算法--R-CA。该方法可以在无线节点需要通信时为其动态分配信道，并在数据传输后释放信道。在R-CA中，有限的信道资源可以被更多的无线节点有效利用，从而提高通信吞吐量。仿真结果表明，该信道分配策略能够有效地保证和提高无线网状网的网络吞吐量和分组投递率。版权所有©2012 John Wiley&Sons，Ltd.
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 © 2012 John Wiley & Sons, Ltd.