Seamless switching method for wireless heterogeneous network

Abstract

The invention discloses a seamless switching method of a wireless heterogeneous network. When a mobile terminal needs to switch network, the present net router sends the switching order to the net router to be accessed, then the net router to be accessed sends an authentication request to an authentication server, and after authenticating that the configuration request is sent to a DHCP server and distributing a new IP address to the DHCP server, the present net router of the mobile terminal is informed of the IP address, and the net router to be accessed sends a connection request to the communication equipment of the mobile terminal, then the communication equipment copies and sends the communication information of the mobile terminal to the net router to be accessed after receiving theconnection request, the connection with the present network of the mobile network is stopped after connection confirmation, and at the same time the mobile terminal updates the information of the location for the location ownership server. By the method, seamless switching of the network can be finished and the large-delay high packet error rate is avoided.

Description

technical field [0001] The invention relates to the field of wireless networks, in particular to a method for seamless switching of wireless heterogeneous networks. Background technique [0002] The European Telecommunications Standards Institute has made a detailed definition of the quality of service (QoS) of voice and media streams based on IP networks, which are: the highest, high, medium and best effort (best effort) four levels, of which the highest and high two levels The end-to-end delay is required to be less than 100 milliseconds, the medium requirement is less than 150 milliseconds, and the data delay of the best-effort service type is no more than 400 milliseconds. It can be seen that when the mobile terminal undergoes network switching, the switching delay should be as small as possible to meet QoS Require. [0003] An important and thorny issue in wireless handover is how to support seamless roaming when terminals cross heterogeneous networks. The solutions p...

AI Technical Summary

Problems solved by technology

The defect of this method is: this process needs to give up the original address (home address), so the packet loss of the original connection interruption is brought; There will be a noticeable switching delay

[0011] (2) This method is only suitable for horizontal switching, that is, switching between homogeneous networks

[0012] (3) Since this structure requires all base stations in the network to be equipped with a B2BUA, operators may not be able to accept

[0015] (3) The consequences caused by duplicating packets are only considered at the MH end, but the impact at the corresponding node (CH) is not considered, which will cause serious consequences at the CH end

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