Network switching method and system, communication device

Abstract

The embodiments of the invention disclose a network handover method and system and communication equipment. The method comprises: receiving, by PCRF (Policy and Charging Rules Function) equipment, a user policy request message sent by new packet service gateway equipment, wherein the user policy request message comprises address information and user identification information of the new packet service gateway equipment; acquiring on-line state information of a mobile terminal user and identifying whether the mobile terminal user is on line or not at present; if on line, acquiring address information of the connected original packet service gateway equipment of the mobile terminal user, and judging whether the address of the original packet service gateway equipment is consistent with that of the new packet service gateway equipment or not; if not consistent, requesting the original packet service gateway equipment to release the session of the mobile terminal user, and returning user control strategy information of the mobile terminal user to the new packet service gateway equipment, so that the mobile terminal is connected to a new communication network via the new packet service gateway equipment. The method, the system and the communication equipment can solve the technical problem of death of user sessions on the original PGW (Packet Data Network Gateway).

Description

technical field [0001] The invention relates to communication technology, in particular to a network switching method and system, and communication equipment. Background technique [0002] 3GPP (Three Generation Partnership Project) R8 technical specification proposes LTE (Long Term Evolution) technology, and also proposes the concept of SAE (Service Architecture Evolution, system architecture evolution). SAE consists of EPC (Evolved Packet Core, evolved packet core network) and E-UTRAN (Evolved Unified Terrestrial Radio Access Network) are composed of two parts. EPC is a multi-access core network that supports a variety of different wireless access technologies, including: CDMA (Code Division Multiple Access) 2000, WCDMA (Wideband Code Division Multiple Access), WLAN (Wireless Local Area Network), LTE and other wireless access technology. Among them, CDMA belongs to the 3GPP2 technology system, and the wireless side needs to be upgraded to eHRPD (Enhanced High Rate Packet...

AI Technical Summary

Problems solved by technology

However, at this time, the user's 4G session on the original PGW that the mobile terminal accesses to the LTE network has always existed and cannot be released, resulting in a dead session;

[0006] In another scenario, when the 4G network signal of the mobile terminal is lost, it directly accesses from the CDMA20001x EV-DO (EV-DO / DO, Evolution Data Optimization) / 1x network, through the PDSN (Packet Data Serving Node, packet data service node ) to access the Internet, the original PGW session that the mobile terminal accesses on the LTE network still exists and cannot be released, resulting in a dead session

[0007] The dead session of the mobile terminal on the original PGW connected to the LTE network will not only seriously waste the IP address resources on the original PGW, but also cause the problem of duplicate bills. The original PGW and the newly accessed PGW / PDSN will simultaneously Issue a bill, resulting in two bills being issued for the user at the same time, thus forming a cross bill, increasing the user's Internet access fee, and bringing the risk of complaints to the operator

At present, there is no solution for the above problems in the industry

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