Wireless network seamless transfer method and device based on software-defined network

Abstract

The invention discloses a wireless network seamless transfer method and device based on a software-defined network. By introducing a framework of the software defined network, the method and the device of the invention separate a data plane and a control plane in a network and improve a traditional distributed network into a centralized network. A client accesses two different APs in a wireless network by using double network cards, and a controller monitors network topological changes in real time and generates an appropriate flow table for corresponding conversion equipment, and establishes a corresponding logic link to enable the network service of the client not to be interrupted while the client is roaming in the range of the wireless network. The method has the advantages as follows: in comparison with the traditional network, the controller controls the data flow with finer granularity, issues the flow table according to the network topological changes and a network segment where the client is located, and correctly orients the data flow to the current position of the mobile client so that the client could roam across the network segments in the range of the wireless network, while the network service of the client is not interrupted, namely seamless transfer is achieved.

Description

technical field [0001] The invention relates to the technical problem of wireless network networking, in particular to a method and device for seamless handover of a wireless network based on a software-defined network. Background technique [0002] In recent years, the continuous development of network technology and the rapid growth of Internet services have promoted the market demand for wireless broadband networks, and the number of wireless broadband users has grown rapidly. Among many broadband technologies, wireless network technology will become an important part of future communication network technology. Under the coverage of wireless network, the mobility of wireless users has become a research hotspot in wireless network technology. Wireless network handover refers to a wireless user disconnecting from one AP to connect to an adjacent AP when moving within the coverage area of ​​the wireless network, and the network service is not interrupted during the process....

AI Technical Summary

Problems solved by technology

However, in today's wireless network networking mode, the client IP address cannot be changed when the user roams, so the mobility is greatly restricted.

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