| 摘要 |
The disclosure provides a method and a system for realizing application detection and control in an IP-Connectivity Access Network (IP-CAN) session supporting dual stack. The method includes: a Policy and Charging Rules Function (PCRF) informs a Traffic Detection Function (TDF) of an IPv4 address via a TDF session established for the IP-CAN session if a gateway where the PCEF is located or another external network element allocates the IPv4 address according to a request of the UE and the UE accesses a service using the IPv4 address, after the UE establishes the IP-CAN session and accesses a service using an IPv6 address in the IP-CAN session supporting dual stack; and the TDF performs application detection and control on traffic, of which the source address and/or the destination address is/are the IPv4 address, according to an Application Detection and Control (ADC) rule related to the TDF session. With the method of the disclosure, the PCRF will no longer initiate a request for establishing a new TDF session, in this way, the service detection for one same IP-CAN session needs to be reported via one same TDF session only, thus, resources are saved and signalling overhead is reduced. |
| 主权项 |
1. A method for realizing application detection and control in an IP-Connectivity Access Network (IP-CAN) session supporting dual stack, comprising:
establishing, by a User Equipment (UE), the IP-CAN session; constructing, by the UE, an IPv6 address according to an IPv6 address prefix received through the IP-CAN session; establishing, by a Traffic Detection Function (TDF) or a Policy and Charging Rules Function entity (PCRF), a TDF session corresponding to the IPv6 address; allocating, by a gateway where a Policy and Control Enforcement Function entity (PCEF) is located or another external network element, an IPv4 address to the UE according to a request from the UE; the method further comprising: informing, by the PCRF, the TDF of the IPv4 address via the TDF session corresponding to the IPv6 address; and associating, by the TDF, the IPv4 address with the TDF session corresponding to the IPv6 address; performing, by the TDF, application detection and control on traffic, of which a source address and/or a destination address is/are the IPv4 address, according to an Application Detection and Control (ADC) rule related to the TDF session; when the IPv4 address is released, informing, by the PCRF, the TDF of the released IPv4 address via the TDF session corresponding to the IPv6 address; and stopping, by the TDF, applying the ADC rule related to the TDF session to traffic matched with the released IPv4 address. |
