多接口多射频无线Mesh网络部分重叠信道分配研究

Research on channel allocation of partial overlapping channels in multi interface and multi radio frequency wireless Mesh networks

在多射频多信道无线Mesh网络中,信道分配和路由共同决定了链路上流量的分布。因此,信道分配和路由设计相结合是一种高效的联合解决方案。IEEE 802.112.4 GHz标准由于其在实际网络场景中的适应性而在无线Mesh网络中被广泛使用,然而在IEEE 802.112.4 GHz中由于相邻信道的频谱部分重叠,通常只有有限的正交信道被使用,造成无线电频谱资源的浪费并导致网络容量降低。文章设计了一种使用部分重叠信道的联合信道分配和路由策略。该策略充分利用所有IEEE 802.11 2.4 GHz频段的频谱资源,实现了无冲突传输。仿真结果表明,本策略可以提高频谱利用率和吞吐量。

Channel assignment and routing promotes towards the joint solutions for efficient configurations because they both determine the traffic distribution over links and channels.Multi-radio multi-channel wireless Mesh networks(MRMC WMNs)are implemented in IEEE 802.11 standards are widely used due to its adaptability in practical network scenarios.However,the orthogonal channels are typically the only channels in use in MRMC WMNs,which wastes the radio spectrum usage and causes capacity reduction.In this paper,we fully exploit the spectrum resource in IEEE 802.112.4 GHz bands and propose a scheme called jointed channel assignment and routing using partially overlapping channels,which uses all the available channels and achieves collision-free transmissions.Simulation shows that,this scheme leads to better utilization of the spectrum and throughput improvement.