Rapid and vertical switching system and method between mobile communication network and wireless local area network

Abstract

The invention provides rapid and vertical switching system and method between a mobile communication network and a wireless local area network. The method is based on an open IP multimedia subsystem and internet, and takes a wireless gateway as a vertical switching control center. The method has additional dual SIP (Session Initiation Protocol) and UA (User Agent) for a dual-mode mobile terminal and functional support for a packet filter, and has additional SIP B2B UA modules for a wireless gateway (RGW) and gate GPRS nodes and functional support for a packet filter. The method realizes rapid and vertical switching between the mobile communication network and the wireless local area network. The RGW (Residential Gateway) detects a switching accident in the process of switching, establishes a dialogue between the RGW and a GGSN (Gateway), and reduces the number of signal switching during the transmission on a wireless link. Media streams are copied to the switched target network by utilizing the dialogue, the performance of vertical switching is improved, and the service quality of real-time stream media and the transmission efficiency of file downloading in the process of switching are ensured.

Description

technical field [0001] The invention belongs to the technical field of network communication, and in particular relates to a fast vertical switching system and method between a mobile communication network and a wireless local area network. technical background [0002] Overlapping mobile communication networks (such as UMTS / 3G) and wireless local area networks (such as wifi, etc.) will provide the main network access methods in the future. Mobile communication networks provide large-scale, medium-low rate network coverage, and wireless local area networks provide small-scale, High-speed network coverage. Combining the two to provide ubiquitous network access has become a trend. Mobility is one of the important research contents. [0003] From the perspective of mobility management, mobility can be divided into four types: [0004] Vertical macro mobility: users use different wireless access technologies to move between different management domains; [0005] Horizontal m...

AI Technical Summary

Problems solved by technology

[0013] (1) During the vertical switching process, it is difficult to ensure that the current active session is not interrupted;

[0014] (2) During the vertical switching process, the service quality of the real-time streaming media service will deteriorate;

[0015] (3) In the process of vertical switching, there will be a problem of unequal switching two-way delay;

[0016] (4) In the process of vertical switching, there will be data loss, which will reduce the efficiency of file download

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