摘要
针对节点具有多个可用信道的自组网的信道资源利用率问题,提出了一种基于认知无线电的MAC接入协议。协议根据网络中节点的邻居关系,通过认知推理对两跳邻居范围内的不同网络节点分配不同的驻留信道。驻留信道的选择考虑了避免信道干扰和冲突,每个节点只需要两部半双工收发信机就能够实现在多个信道上高效的数据收发,同时只需很少的控制信息开销。仿真结果表明,协议在网络总吞吐量、端到端时延等方面具有优良的性能,能很好地适用于节点密集的应用场合。
Focusing on the utilization rate of channel resource in ad hoc networks with nodes having multiple channels available,in this paper a cognitive radio-based MAC access protocol is presented.The protocol follows cognitive reasoning method to assign different stay resident channel for different network nodes among two-hop network neighbours according to the neighbourhood of nodes in the network.The selection of stay resident channels takes into account the avoidance of channels＇ interference and collision,for realising efficient data transmission on multiple channels,it only needs two half-duplex transceivers at each node with just few control messages cost at the same time.Simulation results demonstrate that the protocol has good performance in aspects of overall network throughput and average end-to-end delay,which makes it well adaptable for crowed ad hoc network environment.
出处
《计算机应用与软件》
CSCD
2010年第11期223-225,共3页
Computer Applications and Software
关键词
自组网
认知无线电
信道分配
多信道
MAC协议
Ad hoc networks
Cognitive radio
Channel assignment
Multi-channel
MAC Protocol
