Mobile communication terminal device and information exchanging method thereof

Abstract

The invention discloses a mobile communication terminal device capable of realizing quick and continuous smooth switch during the roaming among data communication networks and an information exchanging method thereof. The mobile communication terminal device comprises a network access unit with a network access mechanism and a multi-address determination unit, wherein the multi-address determination unit is used for acquiring information by using a group of interfaces to exchange information with the network access unit; the information represents that a channel used in an existing communication session is interrupted; an upper layer of a network layer is notified before the interruption occurs actually; the group of interfaces comprises setting interfaces and triggering interfaces; the setting interfaces are used for sending signals to the network access unit by the multi-address determination unit, wherein the signals contain identifiers for identifying events notified by requiring the network access unit via the multi-address determination unit; and the triggering interfaces are used for sending signals to the multi-address determination unit by the network access unit, whereinthe signals contain identifiers for identifying the network access unit and are used for notifying event occurrences or future occurrences.

Description

[0001] The patent application for this invention is a divisional application of the following patent application: [0002] Application number: 200480044323.5; Application date: November 5, 2004; Invention name: Mobile communication terminal device, its control method, communication system and its roaming method technical field [0003] The present invention relates to a mobile communication terminal device that can be used in a plurality of packet-switched data communication networks, and whose connection point for participating in the network is often changed, that is, roaming. In particular, it relates to a mobile communication terminal device which has a plurality of network access mechanisms for participating in a plurality of said networks, and which collectively controls these network access mechanisms so as to conform to the protocols of said networks. [0004] Also, the present invention can be applied to dual radio access technologies such as IEEE (Institute of Electr...

AI Technical Summary

Problems solved by technology

These techniques can reduce switching overhead, but it takes a certain amount of time to switch from the old care-of address to the new care-of address

Therefore, even with these techniques, smooth switching is still not fully achieved

Furthermore, in these techniques, since the association between the home address of the mobile communication terminal device and the care-of address has to be dynamically provided to the base station, the signal processing load in the base station is high.

Furthermore, these techniques depend on the capabilities and functions of the base station that actually performs each process of handover, thus making the structure of the base station more complicated and making the base station more expensive

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