Abstract: A method for selecting a policy and charging rules function entity in the non-roaming scenario includes the following steps: when a diameter routing agent DRA receives an indication message of the IP connectivity access network IP-CAN session establishment, the indication message is forwarded to a PCRF according to the related relationship which is set up and saved for allocating the policy and charging rules function PCRF entity to the IP-CAN session; and the corresponding policy and charging control PCC policy, which is made for the IP-CAN session by the PCRF, is forwarded to the provider's IP application function AF and the network element, which has policy and charging enforcement function, corresponding to the IP-CAN session.

Abstract: The present invention discloses a method for informing Home Subscriber Server (HSS) of Packet Data Network Gateway (PDN GW) address information to be stored in the HSS in the System Architecture Evolution. The method comprises: the Mobility Management Node acquires that the PDN GW address information is not stored in the HSS, or the Mobility Management Node selects another PDN GW; the Mobility Management Node informs the HSS of the PDN GW address information to store. According to the present invention, the HSS can obtain the PDN GW address information directly from the MME without the help of the 3GPP AAA Server and the roaming interface between the PDN GW and the HSS.

Abstract: A method for avoiding resource being released mistakenly during tracking area update or handover process comprising: determining, by a target Mobility Management Entity MME, whether to use an old System Architecture Evolution Serving GW or to reselect a new Serving GW; if the target MME determines to select a new serving GW, notifying the original MME, the original MME sending a request for deleting bearer to the old Serving GW. The technical scheme of the present invention can avoid that the original MME will still send a request for deleting subscriber context to the old Serving GW when the target MME still uses the old Serving GW rather than selects a new one during tracking area update or handover process of the subscriber, which results in the appearance of a problem that the resource related to the subscriber in the old Serving GW is released mistakenly.

Abstract: “A method for dealing with the packet domain gateway support node errors, including: a Radio Network Controller (4) sends a notification message to a Serving GPRS Support Node (2) according to an error indication message; in the case of a direct tunnel, the Serving GPRS Support Node initiates a process of deactivating a packet data protocol context to a user equipment (1) according to the received notification message, so as to make the states of the packet data protocol contexts in the user equipment, the Serving GPRS Support Node and a Gateway GPRS Support Node (3) consistent.

Abstract: The present invention provides an intra-system handoff method, comprising the following steps: S302, when deciding a handoff of UE to a target base station, a source base station issues a handoff request to the target base station; S304, in response to the handoff request from the source base station, the target base station informs the source base station to conduct handoff for the UE; S306, after the completion of the handoff, the target base station issues an update request to an MME; and S308, in response to the update request from the target base station, the MME conducts Serving GW selection, and further fulfils the intra-system handoff. By the present invention, the target eNodeB need not determine whether access to the Serving GW is available, and accordingly the target eNodeB can avoid from configuring Serving GW.

Abstract: The present invention discloses a method for triggering tracking area update in packet switched wireless system that includes equivalent tracking areas.