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    罗 娟 潘 陈 李仁发. 无线Mesh网络中多射频多信道MAC机制设计[J]. 计算机研究与发展, 2012, 49(2): 253-260.
    引用本文: 罗 娟 潘 陈 李仁发. 无线Mesh网络中多射频多信道MAC机制设计[J]. 计算机研究与发展, 2012, 49(2): 253-260.
    Luo Juan, Pan Chen, and Li Renfa. Design of MAC Scheme in Multi-Channel Multi-Radio WMNs[J]. Journal of Computer Research and Development, 2012, 49(2): 253-260.
    Citation: Luo Juan, Pan Chen, and Li Renfa. Design of MAC Scheme in Multi-Channel Multi-Radio WMNs[J]. Journal of Computer Research and Development, 2012, 49(2): 253-260.

    无线Mesh网络中多射频多信道MAC机制设计

    Design of MAC Scheme in Multi-Channel Multi-Radio WMNs

    • 摘要: 针对无线Mesh网络中多信道分配问题,提出了一种适用于多射频网络的MAC机制MRMC-MAC.整个机制包含节点默认接收信道分配、可切换主信道集分配、节点通信以及可切换主信道集更新4部分.采用一种基于接收负载的分配算法,将接收负载作为信道分配的优先级参数,保证了接收负载重的节点优先分配到负载较小的信道,而接收负载较轻的节点间可以共享同一个默认接收信道,从而平衡了各个信道间的负载.分析了多射频网络中的多信道的隐终端问题并提出了解决方案.仿真结果表明,使用MRMC-MAC协议能够明显地改进MAC层吞吐量、碰撞次数等性能参数.

       

      Abstract: Wireless mesh network is a communications network made up of radio nodes organized in a mesh topology. Aimed to multi-channel assignment in wireless mesh network, a new MAC scheme is proposed named MRMC-MAC. MRMC-MAC scheme includes default receiver channel allocation, distribution of main switchable channels, node communication and the update of main switchable channels. In MRMC-MAC, channel allocation is on the basis of a received load-based allocation algorithm. The received load is defined as priority parameter in channel allocation, which can ensure that heaviest received load node has the highest priority to get the light load channel and light received load nodes share the same default receiver channel. Thus, the load between the channels can be balanced. In addition, the hidden terminal problem in multi-channel multi-radio network is analyzed, and some solutions to solve the hidden terminal problem are presented. Simulation on MRMC-MAC is conducted using NCTUns 5.0 platform and the simulation results show that network capacity has been greatly improved in MRMC-MAC.

       

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