Abstract: The present invention discloses a home NodeB access method comprising: during initialization, a home NodeB access point selecting a home NodeB gateway connected to one of core networks which the home NodeB access point has right to access as a serving home NodeB gateway; the home NodeB access point registering in the serving home NodeB gateway, registering user information with the serving home NodeB gateway after receiving a non-access layer message sent from a user equipment, and forwarding the non-access layer message to the serving home NodeB gateway; and the serving home NodeB gateway forwarding the non-access layer message to a core network corresponding to a network access identifier of the user equipment according to the identifier after receiving the non-access layer message; and the core network interacting with the user equipment to complete access of the user equipment; so as to achieve share of the home NodeB.

Abstract: The present invention discloses an emergency service handover method which is applied in a single radio voice service system. A UE has established an emergency session between an IMS domain and an emergency call center via LTE/SAE network, wherein the emergency session is anchored to a service centralization and continuity application server, SCC AS, at a visited location. When MSC obtains information that the UE having established the emergency session needs to be switched to a CS domain, an enhanced MSC initiates a session establishment request to the visited SCC AS for performing a handover from the IMS domain to the CS domain on a service layer.

Abstract: A method for implementing call forwarding on user-determined user busy, including the following steps of: step 1: after receiving a session request routed by a CSCF from a calling side (401, 402), an IMS Circuit Switched Control Function (ICCF) on a called side establishing a call with a called terminal having IMS Centralized Service (ICS) capability (403), and then the called terminal ringing (410); step 2: sending, by the called terminal, a user-determined user busy message to the ICCF when a called user rejects the call (404); and step 3: notifying, by the ICCF, a Telecom Application Server (TAS) that the called terminal is in a user-determined user busy state (405), and the TAS initiating a procedure of call forwarding on user-determined user busy (406). A method for releasing the established media resources resources and session is also provided.

Abstract: A method for implementing a chairman side conference service of an IP Multimedia Subsystem centralized service is disclosed. A non ICS UE has contracted a conference service and is currently in calls with multiple UEs. The method for implementing the conference service when the non ICS UE serves as a chairman UE comprises: the chairman UE originating a conference setup request to an eMSC; after receiving the request, the eMSC sending a session request message for setting up the conference service to a conferencing server according to the address of the conferencing server to which the chairman UE belongs; the conferencing server returning a success response message to the eMSC; after receiving the response, the eMSC inviting the UEs, which are currently in calls with the chairman UE, to participate in the conference, and returning a conference setup success message to the chairman UE after the participation is successful.

Abstract: The present invention discloses a home NodeB access method comprising: during initialization, a home NodeB access point selecting a home NodeB gateway connected to one of core networks which the home NodeB access point has right to access as a serving home NodeB gateway; the home NodeB access point registering in the serving home NodeB gateway, registering user information with the serving home NodeB gateway after receiving a non-access layer message sent from a user equipment, and forwarding the non-access layer message to the serving home NodeB gateway; and the serving home NodeB gateway forwarding the non-access layer message to a core network corresponding to a network access identifier of the user equipment according to the identifier after receiving the non-access layer message; and the core network interacting with the user equipment to complete access of the user equipment; so as to achieve share of the home NodeB.

Abstract: A domain transferring method for the single radio voice call continuity, a UE accesses via an LTE/SAE network, and sets up an IMS session anchored at a VCC AS with a remote node; when an S-IWF receives a handover request used to transfer the session to make the session access from a CS domain, the method comprises: the LTE/SAE network sends a handover command to the UE, the UE sends a handover complete message to a target access device after receiving the handover command; after the UE sends the handover complete message, or after the S-IWF receives the handover complete message, a release session notification message is sent to a VCC AS; after receiving the session release notification message, the VCC AS releases the session resources of the session.

Abstract: The present invention discloses an emergency service handover method which is applied in a single radio voice service system. A UE has established an emergency session between an IMS domain and an emergency call center via LTE/SAE network, wherein the emergency session is anchored to a service centralization and continuity application server, SCC AS, at a visited location. When MSC obtains information that the UE having established the emergency session needs to be switched to a CS domain, an enhanced MSC initiates a session establishment request to the visited SCC AS for performing a handover from the IMS domain to the CS domain on a service layer.

Abstract: A domain transferring method for the single radio voice call continuity, a UE accesses via an LTE/SAE network, and sets up an IMS session anchored at a VCC AS with a remote node; when an S-IWF receives a handover request used to transfer the session to make the session access from a CS domain, the method comprises: the LTE/SAE network sends a handover command to the UE, the UE sends a handover complete message to a target access device after receiving the handover command; after the UE sends the handover complete message, or after the S-IWF receives the handover complete message, a release session notification message is sent to a VCC AS; after receiving the session release notification message, the VCC AS releases the session resources of the session.

Abstract: A method for implementing a chairman side conference service of an IP Multimedia Subsystem centralized service is disclosed. A non ICS UE has contracted a conference service and is currently in calls with multiple UEs. The method for implementing the conference service when the non ICS UE serves as a chairman UE comprises: the chairman UE originating a conference setup request to an eMSC; after receiving the request, the eMSC sending a session request message for setting up the conference service to a conferencing server according to the address of the conferencing server to which the chairman UE belongs; the conferencing server returning a success response message to the eMSC; after receiving the response, the eMSC inviting the UEs, which are currently in calls with the chairman UE, to participate in the conference, and returning a conference setup success message to the chairman UE after the participation is successful.

Abstract: The present invention provides a method for implementing call forwarding on user-determined user busy, comprising the following steps of: step 1: after receiving a session request routed by a CSCF from a calling side (401, 402), an IMS Circuit Switched Control Function (ICCF) on a called side establishing a call with a called terminal having IMS Centralized Service (ICS) capability (403), and then the called terminal ringing (410); step 2: sending, by the called terminal, a user-determined user busy message to the ICCF when a called user rejects the call (404); and step 3: notifying, by the ICCF, a Telecom Application Server (TAS) that the called terminal is in a user-determined user busy state (405), and the TAS initiating a procedure of call forwarding on user-determined user busy (406). A procedure of the call forwarding on user-determined user busy can be implemented reliably, whether the call between the called user and the ICCF is established using a calling process or a called process.