Session control method, device and GPRS gateway control node GGSN

Abstract

The invention provides a session control method, a device and a GPRS gateway control node GGSN. The GGSN is used for carrying out mapping conversion between a private network address and a public network address and maintaining a mapping entry list between the private network address and the public network address. The method comprises steps that: whether the GGSN receives a packet data protocol PDP deactivation message for requesting releasing packet data business is detected; when the detection result indicates that the GGSN receives the PDP deactivation message, the private network IP address contained in the PDP deactivation message is released, and a mapping entry corresponding to the private network IP address is deleted from the mapping entry list. According to the method, the device and the GPRS gateway control node GGSN, network address conversion on the GGSN can be realized, and the private network IP address can be released while the network address conversion mapping entry corresponding to the private network IP address is deleted.

Description

technical field [0001] The present invention relates to the communication field, in particular to a session control method, device and GPRS gateway control node GGSN. Background technique [0002] Existing mobile packet domain network architecture such as figure 1 shown, including: [0003] The Serving GPRS Support Node (SGSN) is used to save the location information of the user's routing area and is responsible for security and access control. The SGSN is connected to the BSS of the second-generation mobile communication system through the Gb port, and connected to the second RNS system connection of three generations of mobile communication; [0004] Gateway GPRS Support Node (Gateway GPRS Support Node, GGSN) mainly functions as a gateway. GGSN is responsible for responding to the PDP activation request initiated by the terminal, assigning the operator’s private network IP address to the terminal, and establishing a PDP session. Perform traffic accounting and terminal d...

AI Technical Summary

Problems solved by technology

[0009] Gi firewall resource waste

[0010] Since the user's offline message event and the firewall's NAT mapping entries are not synchronized, the NAT mapping relationship will still be maintained for a certain period of time after the user is offline, and cannot be released in time. With the continuous increase of mobile phone users and the Internet traffic The ever-increasing number will cause a certain waste of firewall resources

[0011] Over-traffic billing attacks will cause user over-traffic billing

[0027] In order for the session synchronization protocol signaling sent by the GTP firewall to reach the Gi firewall, the corresponding relationship between the GTP firewall and the Gi firewall needs to be manually defined. It is necessary to define the correct routes to different Gi firewalls on all GTP firewalls, and the configuration is relatively complicated.

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