Joint Design Of Channel Assignment And Routing In Multi-radio Multi-channel Wireless Mesh Networks

Wireless Mesh network is one of the most important technologies in next-generation network evolution. Its multi-hop, self-organization,self-healing and simple deployment is an effective way to solve the bottleneck problem of last mile. Considering the interaction between channel allocation and routing, it needs joint channel allocation and routing to optimize the design, in order to improve the channel utilization and network performance, and to play the role of multi-radio frequency multi-channel technology Multi-channel technology advantages.Channel allocation technology and routing technology are the key technologies in multi-radio multi-channel wireless Mesh networks. The combination of the two methods can reduce the channel interference more effectively and improve the network performance. Therefore, it is very necessary for the joint optimization design. In this paper, the joint optimization design method of channel allocation and routing in multi -radio multi - channel wireless mesh networks is systematically classified,and these joint optimization algorithms are analyzed and compared deeply.Aiming at the interference problem and the delay problem in the multi-radio frequency multi - channel Mesh network, considering the interference suppression and delay constraint, a joint optimization scheme of channel allocation and routing is proposed. The algorithm uses a different channel combination to obtain a set of single-hop routing metrics from the node to the next hop based on the routing single hop metric. The channel used by the minimum single hop routing metric in the set is used as the node to the next The best channel for the link between the hop nodes. Based on the simulation, the theoretical performance of the improved algorithm, including the number of flow and the flow rate, is analyzed. The performance of the average throughput,the average delay and the average packet loss rate are compared with the existing protocol. The improved algorithm has the advantages of network performance. obvious advantage.In this paper, we focus on the congestion suppression, load balancing,channel allocation and routing optimization design, which mainly focuses on the design of channel load, adjustable weighting factor and joint routing metric, which is based on the idea of network congestion. A Dynamic Load Sensing Joint Optimization Algorithm. The algorithm takes load balancing and interference suppression as the optimization target. In the process of routing, the algorithm takes into account the channel load and channel allocation, so as to realize the effect of joint optimization. In this paper, the proposed algorithm is simulated and compared with three algorithms. It can be seen from the simulation results that the proposed algorithm has a significant improvement in network performance such as average throughput rate and average packet loss rate.