Method and system for reporting access information of fixed network

Abstract

The invention discloses a method for reporting the access information of a fixed network, which comprises the steps that: an evolved packet data gateway (ePDG) reports the access information of the fixed network to a policy and charging execution function (PCEF); and the PCEF informs the access information of the fixed network to a policy and charging rules function (PCRF). The invention also discloses a system for reporting the access information of the fixed network, and a reporting unit is used for the ePDG to report the access information of the fixed network to the PCEF; and the PCEF informs the access information of the fixed network to the PCRF. The invention can report the access information of the fixed network, so that an S9* conversation can be still established when a broadband policy control function (BPCF) cannot sense the access of user equipment (UE) to a wireless local area network (WLAN).

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method and system for reporting fixed network access information. Background technique [0002] The Evolved Packet System (EPS, Evolved Packet System) of the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) is composed of the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network), Mobility Management Entity (MME, Mobility Management Entity), Serving Gateway (S-GW, ServingGateway), Packet Data Network Gateway (PDN-GW, Packet Data Network Gateway), Home Subscriber Server (HSS, Home Subscriber Server), 3GPP Authentication, authorization and accounting (AAA, Authentication, Authorization and Accounting) server, policy and charging rules function (PCRF, Policy and Charging Rules Function) entity and other supporting nodes. figure 1 It is a schematic diagram of the system architecture of the EP...

AI Technical Summary

Problems solved by technology

However, for method 1, when the UE accesses the WLAN through the RG, since the UE has been authenticated by the RG and the RG has allocated an IP address for the UE, the UE will not go to the BRAS / BNG authentication again, so the BBF fixed network will not perceive When the UE accesses the WLAN, the BPCF will not perceive that the UE is accessing the WLAN. For example, when the UE sends a packet, the RG converts the source IP address of the UE in the packet into the RG's own IP address + a certain port. From the perspective of BRAS / BNG, the received IP packets are all IP packets from RG, and they do not know who the specific UE behind RG is, so BPCF cannot initiate S9 to PCRF * conversation

In short, using the existing technology, since the S9 is initiated to the PCRF through the BPCF * session while initiating the S9 * The premise of the session is that the BPCF must perceive that the UE is connected to the WLAN. Therefore, when the BPCF cannot perceive that the UE is connected to the WLAN, it cannot initiate S9 * Conversational

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