System of radio local network mobility management and its method

Abstract

This invention refers to the mutual connection between WLAN and wireless wide area network (WAN) and discloses a mobile management system and method to realize business continuity, raise FA efficiency of IP and improving network property in terminal roaming, which contains user terminal, WLAN insertion network, 3GPP access network and 3GPP home network, wherein the user terminal and insertion network are connected in wireless mode, the home network contains HA, system contains two-stage FA, the first FA is in insertion network for distributing LCoA to user terminal and making address replacement and data care of with second stage FA, the second stage is in access network for distributing RCoA to user terminal, binding RCoA and LCoA of user terminal and making address replacement and data care of between FA and FA of first stage.

Description

technical field [0001] The invention relates to the intercommunication between WLAN and wireless wide area network, in particular to the mobility management of WLAN network. Background technique [0002] At present, the development of wireless network is advancing by leaps and bounds. The wireless network can be roughly divided into a wireless local area network (Wireless Local Area Network, “WLAN” for short) and a wireless wide area network. [0003] Wireless Local Area Network (WLAN) is a communication system that uses radio frequency, microwave or infrared rays to interconnect devices within a limited geographical range. 802.11, 802.11b, 802.11a, 802.11g, Bluetooth and other standards. Among them, 802.11b is currently the most widely used standard. It works in the 2.4G frequency band and adopts Direct Sequence Spread Spectrum (Direct Sequence [0004] Spread Spectrum, referred to as "DSSS") spread spectrum method, providing the highest data transmission rate of 11Mbps....

AI Technical Summary

Problems solved by technology

[0026] In practical application, the above-mentioned solution has the following problems: If the mobile IP technology is not used: one, although the user terminal 10 has accessed the WLAN network, it has not yet established a channel connection with the network service through the home network PDG 32, or Have not set up the channel to certain or certain group of business, and have business to need to send data to this user terminal 10 at this moment, just can't find user terminal 10 at this moment; Two, user terminal 10 moves between WLAN, new WLAN connects The replacement of different IP addresses assigned to the network will cause service and connection interruptions, which requires re-initiation of services

[0027] If the general mobile IP technology is used: as the mobile terminal 10 moves, the WLAN AN 20 frequently registers with the home agent HA, wasting network resources; or the WLAN AN 20 cannot register with the WAG 42, resulting in communication failure

[0028] The main reason for this situation is that the network based on the TCP / IP protocol does not support the roaming function; the general mobile IP technology has only one foreign agent FA, which cannot handle WLAN AN 20 with small coverage and WLAN AN 20, WAG 42 not in the same operator problem

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