多信道节点分布式协作MAC协议的研究

摘要

A cooperative MAC protocol based on cooperative increment value (CIV) for multi-channel (CIVMAC) is proposed.In CIV-MAC,alternative cooperative nodes are able to sense multiple channel control frames to obtain the channel state information (CSI) and calculate its CIV.According to the nodes' CIV,the protocol would implement cooperative node assignment and selection.And then,it chooses the optimal cooperative node.At the same time,the system energy consumption will be reduced by use of the minimum power control.Finally,the simulation results with two different scenarios show that CIV-MAC can greatly improve the system performance compared with RBAR and CRBAR protocol in terms of energy efficiency and throughput performance.%提出了一种基于协作增量值(CIV)的协作MAC协议(CIV-MAC).在CIV-MAC中,备选协作节点通过侦听多路信道控制帧获得信道状态信息(CSI),并计算自身CIV;根据节点的CIV,协议会实行协作节点分配和选择机制并选出最优的协作节点,同时通过采用最小功率控制算法来降低系统能量消耗.以网络实际有效吞吐量和能量效率2个参数为网络性能指标,通过2个不同场景的仿真实验结果得到,相对于RBAR协议和CRBAR协议,CIV-MAC可以极大地提升系统性能.