Data transmission method and system and core network gateway during switching of heterogeneous IP network

A data transmission method and core network gateway technology, applied in the field of communication, can solve problems such as packet loss, save storage space and reduce packet loss rate.
CN101212461AActive Publication Date: 2008-07-02HUAWEI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAWEI TECH CO LTD
Publication Date
2008-07-02

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Abstract

The invention discloses a method for data transmitting data when a heterogeneity IP network is switched, a heterogeneity IP network system and a core network gateway. The core network gateway is used as different anchor point accessed to the system for the heterogeneity IP network. When the user terminal starts a switching in the heterogeneity IP network, the source network is used for sending a instruction information of retaining business to the core network gateway; the core network gateway carries out a caching to the sent business data of the user terminal according to the instruction information; after the switching is completed, the user terminal sends instruction information of canceling the detainment to the core network gateway through the target network; the core network gateway sends the cached business data to the user terminal according to the instruction information. By adopting the invention, when an activated state user terminal switches between the heterogeneity IP networks, a packet loss rate can be reduced and the switching relay also can be reduced.
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Description

technical field

[0001] The invention relates to the field of communication, in particular to a data transmission method during switching of a heterogeneous IP network, a heterogeneous IP network system and a core network gateway. Background technique

[0002] The 3GPP system includes a radio access network (Radio Access Network, RAN) and a core network, wherein the radio access network is used to handle all wireless-related functions, and the core network handles all voice calls and data connections in the system, and realizes communication with external The switching and routing functions of the network. The core network is logically divided into a circuit switched domain (Circuit Switched Domain, CS) and a packet switched domain (Packet Switched Domain, PS).

[0003] see figure 1 , is a schematic diagram of the PS part of the 3GPP packet domain.

[0004] Such as figure 1 As shown, the main network elements in the PS core network of 3GPP include SGSN (Serving GPRS Suppo...

Claims

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