System and method for realizing mobile switching based on Open Flow

Abstract

The invention discloses a method for keeping communication between a mobile node and a communication node at the other end of internet to finish access point switching on a public part in a signal coverage range of two wireless access points during movement of the mobile node. A controller learns the global network information through feedback of each piece of network switching equipment supporting an Open Flow function; the switching is triggered when a specific mobile switching triggering condition is achieved; and the controller issues a flow rule for the corresponding network switching equipment and wireless access points supporting the Open Flow function and specifies a new data flow forward path, so that the communication of the mobile node and the communication node is not interrupted during switching.

Description

[0001] technical field [0002] The invention relates to the field of computer networks, in particular to a system and method for realizing mobile handover based on OpenFlow. [0003] Background technique [0004] In the wireless network, the terminal will change the network access point during the mobile process. In order to maintain the continuity of node communication, the Internet Engineering Task Force (IETF) has formulated the mobile IP standard communication protocol. Mobile IP defines three types of functional entities: mobile node (Mobile Node, MN), home agent (Home Agent, HA), foreign agent (Foreign Agent, FA). Among them, the home agent and the foreign agent are collectively referred to as the mobile agent (Mobility Agent, MA). [0005] When the MN moves from the range covered by one MA to the range covered by another MA, the process of handing over the communication of the MN to the latter MA is called mobile IP handover. Mobile IP switching mainly goes throug...

AI Technical Summary

Problems solved by technology

The triangular routing problem seriously wastes network resources, increases data packet transmission delay, makes network communication efficiency extremely drop, and increases the processing burden of HA

Since the request data packet has not passed through the firewall, the data packet received at this time is the response data packet without request, and the rules of the firewall are usually to discard this type of data packet, which causes the interruption of the communication between the MN and the CN

If the response packet follows image 3 In the reverse direction of the path from CN to MN, the HA uses tunnel technology to communicate, which will cause greater network delay and lower communication efficiency.

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