Research On Performance Optimization Algorithm For Content Distribution Systems In Wireless Mesh Networks

With the Wi-Fi standard has been introduced,Wireless Mesh Network(WMN)as an extended standard can improve network utilization and enhance network's reliability,during the progress of the Wi-Fi standard updating,Wireless Mesh Network has improved by the standard.To improve the performance of WMN,take new technologies is an effective method.In this paper researches the IEEE 802.11 n standard WMNs and its topology generation and content delivery method.To use the advantage of multiple-input multiple-output(MIMO)technology,we build up a content delivery algorithm and encryption method by this standard to optimize network.It's different from traditional wireless content delivery topology,traditional wireless networks depends strongly on the wireless access point(Access Point,AP)and the distribution source node in the event of failure,the distribution will not continue and shut up.Constructions on the WMN access points and WMN clients in Wireless Mesh Networks based content delivery system is based on 802.11 n wireless protocol,its widely used today,the multi-objective optimization algorithm based on multi-objective optimization model design,build wireless Mesh dynamic allocation of network redundancy content delivery system model.Algorithm I: Assigned by the WMN topology generation strategy and channel strategy,using a multi-objective optimization method for the wireless Mesh network optimization optimize production.Simulation results shows that the WMN topology can structure and channel allocation tree algorithm generated to improve the content delivery system's quality of service and network performance,and the nodes of WMN jitter with dynamic ability to repair.Algorithm II,III are based on lightweight encryption algorithm PRESENT,by two algorithms in a WMN environment transceiver node key exchange and rapid encryption,decryption method implements WMN transmission security.Algorithms for simulation of wireless mesh router application through the virtual router,and processing by the decryption key exchange to achieve a secure transmission.This paper based on standards of IEEE 802.11 n,through the application of the three algorithms,use WMN channel to optimize the transmission efficiency and reliable transmission point to point,and improved the utilization and transfer the security of WMN to achieve a credible transmission and multi-hop network tamper-resistant anti-wiretapping.