The Research On IPv6 Flow Table Compression And Wireless Handover Based On SDN

With the rapid development of network technology and the increasing popularity of mobile Internet in people’s lives,the existing network is difficult to meet the needs of users.The SDN technology can separate the network equipment control and data plane,so the network management staff can manage and control the network flexibly and reliably.IPv6 is the next generation of network IP protocol,which can effectively solve the problem of address depletion in IPv4.The combination of SDN and wireless network makes the wireless network have the flexibility and scalability,which can help to control the distribution of network switching resources and combine with the wired SDN network to form a unified network architecture.We use a complex network to verify the performance of flow table compression scheme based on IPv6 flow label.In order to solve the problem of stream item duplication caused by stream label duplication in stream label compression scheme,a flow table optimization scheme based on IPv6 flow label is proposed to improve the way to match the port number,source and destination MAC address and flow label by to match the port number,destination MAC address,destination IP address and flow label.We have studied the existing wireless SDN framework.The architecture has been improved to solve the communication problems between the AP,the switch and the controller,and based on this theoretical basis,the wireless handover scheme based on SDN is proposed.We issue the flow table to establish a communication path to achieve the user’s handover in advance,eliminating the IP layer switching delay,and finally we apply the IPv6 flow table compression program to the wireless handover.Based on the Mininet-WiFi simulation platform,the simulation experiment of the wireless switching scheme of issuing flow table in advance is carried out.The switching performance is compared and analyzed by the experimental data.The experimental results show that our wireless switching scheme can reduce thr delay of the switching than the hard switching,and the flow table compression scheme can reduce the size of the flow table and reduce the storage of the switch.The experiment proves the validity and feasibility of the switching scheme.