Method and device for addressing PCRF

Abstract

The invention provides a method for addressing a PCRF (Policy and Charging Rules Function), which comprises the following steps of: determining a second equipment address to which UE belongs currentlybased on a pre-configured mapping relation between an IP (Internet Protocol) address and a second equipment address of the UE; based on a second equipment address to which the UE belongs currently and a query interface preset between the first equipment and the second equipment, querying address information of a PCRF (Policy and Charging Rules Function) responsible for the control of the UE PCC from the second equipment; and the address information of the PCRF is contained in an AAR message and sent to a DRA, so that the DRA forwards the AAR message to the corresponding PCRF according to theaddress information of the PCRF or directly addresses the corresponding PCRF according to the address information of the PCRF. The mapping relation between the IP address of the UE and the address ofthe second equipment is pre-configured in the first equipment; the address of the second device to which the UE belongs currently is determined, and the query interface is arranged between the first device and the second device, so that the PCRF host name is accurately obtained, and the PCRF host name can be correctly addressed in a collimated or directly connected manner through a Diameter signaling network.

Description

technical field [0001] The present invention relates to the field of mobile communication, and more specifically, relates to a method and equipment for addressing PCRF. Background technique [0002] According to the 3GPP specification and the actual networking scheme of the operator, figure 1 It is a schematic diagram of the architecture after introducing the Policy and Charging Control (PCC) architecture into the existing network, as shown in figure 1 As shown, the terminal (UserEquipment, UE) accesses the core network Serving GPRS Support Node (Serving GPRSSupport Node, SGSN) through the 2G wireless network and the 3G wireless network, and accesses the external IP network, the GGSN assigns a private IP address to the UE for the UE to access the external IP network; for Internet access applications, the IP address conversion of the UE is completed through the firewall of the SGi / Gi interface, and the private IP address of the UE is converted into a public IP address . Th...

AI Technical Summary

Problems solved by technology

[0012] In the Internet service, the SGi / Gi firewall performs conversion between the private address and the public address of the user IP address. In the prior art, what is recorded and saved in the DRA is the private IP address assigned to the UE by the P-GW / GGSN and the selected IP address. Determine the binding relationship of the PCRF host name, but the IP address of the UE contained in the AAR by the AF may be the user's private IP address before the SGi / Gi interface firewall conversion, or the user's public IP address after the SGi / Gi interface firewall conversion address, when the UE’s IP address included in the AAR by the AF is the user’s public IP address converted by the SGi / Gi interface firewall, the UE’s IP address obtained by the AF must be the same as the IP address assigned to the UE by the P-GW / GGSN The addresses are different, so the AF cannot correctly address the PCRF through the DRA; when the IP address of the UE contained in the AAR by the AF is the private IP address of the user before the firewall conversion of the SGi / Gi interface, due to the different P-GW / GGSN assigned to the user The private IP addresses of the private IP addresses will overlap, so it may also cause AF to be unable to correctly address the PCRF through DRA

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