摘要:
The invention relates to session control in an IMS domain of a communications network and more particularly to techniques for performing session transfer in an IMS control node (SCC AS) for controlling centralized services in an IMS domain. One embodiment of an SCC AS (200) may be adapted to store, for each of a plurality of ongoing communication sessions, a session information item (218) comprising a user identity (222) identifying a user device involved in the session and a first identifier (216) of the user device in a CS domain of the communications network, wherein the user identity is associated with multiple user devices and the first identifier comprises at least one of an MSISDN (216), an IMSI, and a GRUU.
摘要:
An apparatus configured to operate as a Backup system in a Data Layered Architecture Public Land Mobile Network. The apparatus comprises an interface for enabling a data exchange between the apparatus and a plurality of Authentication Centre Front Ends, and a memory for storing subscriber authentication data. The apparatus further comprises a processor for detecting a failure of a Data Back End and for receiving a redirected authentication data set request from an Authentication Centre Front End via the interface. The processor is further configured, in the event of a detected failure of Data Back End, to generate one or more authentication data sets in response to the request using the data stored in the memory, and send the generated data set(s) to the Authentication Centre Front End via the interface.
摘要:
A method performs a Single Radio Voice Call Continuity (SRVCC) Packet Switched (PS) to Circuit Switched (CS) handover of an emergency call that is routed over an IP Multimedia Subsystem (IMS) network. The call is transferred from a first region served by a first Mobility Management Entity (MME) to a second region served by a second MME. The method includes sending a first handover request from the first MME to the second MME to transfer the call. The first handover request includes an Emergency Session Transfer Number for SRVCC (E-STN-SR) identifying an Emergency Access Transfer Function (EATF) in the first region. A second handover request for handover to a CS access is sent to a target Mobile Switching Centre, MSC, and includes the E-STN-SR. The call is handed over to the CS access using the E-STN-SR to route the call via the EATF in the first region.
摘要:
An emergency access transfer function (EATF) node is described for use when hand over of a user equipment (UE) from a first to a second access network is performed during an emergency call session (ECS). The EATF node receives a request for transferring the ECS from the first access network to the second access network. The EATF node transfers the ECS of the UE from the first to the second access network when the ECS is known to the EATF node. The EATF node selects a second EATF node from a set of one or more EATF nodes when the ECS is unknown, and forwards the request for transferring the ECS to the second EATF node. The EATF node may be in a first network region and the second EATF node may be in the first or a second network region.
摘要:
Methods and apparatus are described for use in handling session establishment in a home network or visited network. IMS roaming is described for a UE of the home network that is roaming in the visited network. On receipt of a session establishment request associated with an originating call from the UE the home network determines whether to perform home routing and/or direct home routing of the originating call to the called party. When home routing, execution of service invocation is suspended and the home network sends a session establishment request including a routing number of an application server in the home network back to the visited network, which performs visiting service invocation of the call and routes the signaling and media to the home network-based on the routing number. The network node in the home network resumes execution of service invocation and routing of the originating call to the called party. When direct home routing, the home network performs execution of service invocation and routes the originating call to the called party.
摘要:
A method and apparatus for use in a communications network whereby an Instance Identifier (ID) is created to uniquely identify a device such as a mobile device or User Equipment (UE) in the communications network.
摘要:
An IMS (IP Multimedia Subsystem) network contains at least one of (A) a discovery function (2) for providing ISIM (IP Multimedia Subscriber Identity Module) discovery information to the mobile device (1) and (B) a provisioning function (2, 5, 6) for providing, in response to a request from a mobile device, an ISIM to the mobile device (1). Where the IMS network contains the discovery function, the discovery function is adapted to provide ISIM discovery information to the mobile device, and where the IMS network contains the provisioning function, the provisioning function is adapted to provide an ISIM to the mobile device (1).
摘要:
A system, method, and nodes for managing shared security keys between a User Equipment, UE, an authentication node such as an SCF/NAF, and a service node such as a BM-SC or AS. The SCF/NAF allocates to each BM-SC, a different SCF/NAF identifier such as a fully qualified domain name, FQDN, from the FQDN space the SCF/NAF administers. The SCF/NAF then locally associates these allocated FQDNs with the connected BM-SCs and with different services. The network sends the correct FQDN to the UE in a service description for a desired service, and the UE is able to derive a security key using the FQDN. When the UE requests the desired service, the SCF/NAF is able to associate the service identifier with the correct FQDN and an associated BM-SC. The SCF/NAF uses the FQDN to obtain the security key from a bootstrapping server and sends it to the associated BM-SC. As a result, the UE and the associated BM-SC share a specific security key.
摘要:
A VoLGA Access Network Controller (VANC), a User Equipment, and methods are described herein for providing security to Voice over Long-Term Evolution via Generic Access (VoLGA) traffic.
摘要:
A method and apparatus for establishing a communication session in an IMS Centralized Services communication network. A Service Centralization and Continuity Application Server (SCC AS) receives a request from an originating device to establish a session with a target device. The request includes a plurality of codec identifiers that could be used by the originating device. The SCC AS sends a second request to establish the session to the target device. The SCC AS subsequently receives, from an intermediate node between the SCC AS and the target device, an invite message. The invite message includes an indication that a codec identifier has been selected from the plurality of codec identifiers. The SCC AS then sends a message to the intermediate node instructing the intermediate node to establish the session.