Abstract: It is disclosed a server node, a 5G mobile communication network and a method performed therein, providing information, to a network function (NF) service consumer, for supporting selection of an NF instance out of a group of NF instances providing a target NF service. By using a network repository function (NRF) discovery request/response procedure, and an NF cluster instance ID that relates NF instances providing a certain service where the NF instances are hosted by one and the same NF, the NRF 406 determines IP addresses with which the requested service can be accessed. By using the NF cluster instance, one or more IP addresses for accessing NF instances providing the requested service hosted by one and the same NF 402, 404 is provided to the NF service consumer 408. The latency sensitive services and where load balancing is required, the NF service instance value knowledge about specific NF hosting the requested service, as well as High availability (HA) support.

Abstract: System, methods, nodes, and instruction set for routing a session invitation from a first network (101) to a second network (112) are described. The first network (101) and the second network (112) are interconnected via at least two points of interconnect (114, 120). A first control node (124) receives a session invitation to a first user equipment (106), both are part of the first network (101). The first control node (124) determines whether a breakout condition for routing of the session invitation to the second network (112) is fulfilled. If so, a second control node (128) of the first network (101) selects a point of interconnect (114, 120) to the second network (112), considering a capability information characterizing the first control node (124). Therefore the session invitation may be routed in an efficient way from the first network (101) to the second network (112).

Abstract: A method of routing an IP Multimedia Subsystem, IMS, connection request sent by a user of a third party service, User A, towards a peer third party service user, User B, where the originating identity and target identity fields contain respectively external third party identities of User A and User B. The method comprises receiving said request at an IMS Access Gateway to an IMS network, and extracting said external identities and determining whether the extracted external identities are registered in respect of a wildcarded IMPU or wildcarded IMPUs that in turn is or are registered in the IMS network. In the event that these are registered, it is determined whether or not service logic is to be executed in the IMS network for both User A and User B and, if not, an IMS Edge Node routable identity associated with User B is determined. The IMS Edge Node routable identity is used to forward the IMS connection request to a terminating side IMS Edge Node.

Abstract: A service indication mechanism is described for use by IP Multimedia Subsystem, IMS, codes (201, 204) of an IMS network (106) in routing a terminating call in a network comprising a circuit switched, CS, network (107) and an IMS network (105, 106). On receipt of a Service Initiation Protocol, SIP, message from a second IMS node (202), the SIP message including a called user number associated with the call (A1), a SIP Uniform Resource Identifier, URI, and the call services for the called user from a user profile database is retrieved (A2). A second SIP URI is generated by including a service indicator of the called user in the received SIP URI, the service indicator representing the call services of the called user (A3), the SIP message is transmitted with the second SIP-URI to a third IMS node (204).

Abstract: System, methods, nodes, and instruction set for routing a session invitation from a first network (101) to a second network (112) are described. The first network (101) and the second network (112) are interconnected via at least two points of interconnect (1 14, 120). A first control node (124) receives a session invitation to a first user equipment (106), both are part of the first network (101). The first control node (124) determines whether a breakout condition for routing of the session invitation to the second network (112) is fulfilled. If so, a second control node (128) of the first network (101) selects a point of interconnect (114, 120) to the second network (112), considering a capability information characterizing the first control node (124). Therefore the session invitation may be routed in an efficient way from the first network (101) to the second network (112).

Abstract: Methods and apparatus are provided for operating a network element in an Internet Protocol Multimedia Subsystem network including a plurality of application servers. The network element receives a user request associated with a user. The user request is applied to a collection of Initial Filter Criteria associated with the user. If an Initial filter Criteria fires, then normal processing of the user request continues. However, if none of the Initial Filter Criteria fires, then default triggering logic determines the session associated with the user request is not recognised or is unknown. The default triggering logic applies the user request to one or more default iFCs, which include selection criteria defining one or more rules or conditions associated with rejecting or processing the user request (e.g. forwarding to an application server or continuing processing the user request at the network element).

Abstract: Embodiments of the present invention include controlling user subscriptions within an IMS Application Server of an IP Multimedia Subsystem, IMS, network, via an Open Service Access Application Programming Interface, API, between the IMS network and a web-based application. Embodiments include subscribing a set of users by sending a start subscription message from said web-based application to the IMS network, the start subscription message including an address for each user in the set. An acknowledgement of the subscription is sent from the IMS network to said web-based application, the acknowledgement including a correlator uniquely identifying the subscribed set of users within the IMS network. A subscription for one or more users of the set is terminated by sending a stop subscription message from said web-based application to the IMS network, the stop subscription message including the address of the or each user for which the subscription is being stopped.

Abstract: A method of routing an IP Multimedia Subsystem, IMS, connection request sent by a user of a third party service, User A, towards a peer third party service user, User B, where the originating identity and target identity fields contain respectively external third party identities of User A and User B. The method comprises receiving said request at an IMS Access Gateway to an IMS network, and extracting said external identities and determining whether the extracted external identities are registered in respect of a wildcarded IMPU or wildcarded IMPUs that in turn is or are registered in the IMS network. In the event that these are registered, it is determined whether or not service logic is to be executed in the IMS network for both User A and User B and, if not, an IMS Edge Node routable identity associated with User B is determined. The IMS Edge Node routable identity is used to forward the IMS connection request to a terminating side IMS Edge Node.

Abstract: A service indication mechanism is described for use by IP Multimedia Subsystem, IMS, codes (201, 204) of an IMS network (106) in routing a terminating call in a network comprising a circuit switched, CS, network (107) and an IMS network (105, 106). On receipt of a Service Initiation Protocol, SIP, message from a second IMS node (202), the SIP message including a called user number associated with the call (A1), a SIP Uniform Resource Identifier, URI, and the call services for the called user from a user profile database is retrieved (A2). A second SIP URI is generated by including a service indicator of the called user in the received SIP URI, the service indicator representing the call services of the called user (A3), the SIP message is transmitted with the second SIP-URI to a third IMS node (204).

Abstract: A method of enabling users of a third party Internet service, who are not necessarily subscribers of an IP Multimedia Subsystem, IMS, network, to access services provided by the IMS network. The method comprises registering a user with said third party Internet service via the Internet using an Internet service identity of the user, and sending to the user, from said third party Internet service and via the Internet, IMS network access information. The access information is then used to register the user with the IMS network, wherein, following IMS registration, the user is able to access IMS network services.

Abstract: A method of operating an IP Multimedia Subsystem user terminal to facilitate user services over a communication network comprising an IP Multimedia Subsystem network. The method comprises receiving a SIP message and parsing the message to identify a generic service identifier. Upon identification of said generic service identifier, either a web link within the message body is identified and a web browser session to said web link established, or web page content contained within the message body is identified and displayed.

Abstract: A method of enabling users of a third party Internet service, who are not necessarily subscribers of an IP Multimedia Subsystem, IMS, network, to access services provided by the IMS network. The method comprises registering a user with said third party Internet service via the Internet using an Internet service identity of the user, and sending to the user, from said third party Internet service and via the Internet, IMS network access information. The access information is then used to register the user with the IMS network, wherein, following IMS registration, the user is able to access IMS network services.

Abstract: Embodiments of the present invention include controlling user subscriptions within an IMS Application Server of an IP Multimedia Subsystem, IMS, network, via an Open Service Access Application Programming Interface, API, between the IMS network and a web-based application. Embodiments include subscribing a set of users by sending a start subscription message from said web-based application to the IMS network, the start subscription message including an address for each user in the set. An acknowledgement of the subscription is sent from the IMS network to said web-based application, the acknowledgement including a correlator uniquely identifying the subscribed set of users within the IMS network. A subscription for one or more users of the set is terminated by sending a stop subscription message from said web-based application to the IMS network, the stop subscription message including the address of the or each user for which the subscription is being stopped.

Abstract: A method of operating an IP Multimedia Subsystem user terminal to facilitate user services over a communication network comprising an IP Multimedia Subsystem network. The method comprises receiving a SIP message and parsing the message to identify a generic service identifier. Upon identification of said generic service identifier, either a web link within the message body is identified and a web browser session to said web link established, or web page content contained within the message body is identified and displayed.

Abstract: A method and arrangement in a telecommunication system for facilitating communication between a first terminal A configured to use a first session model and a second terminal B configured to use a second session model for media transportation. A first feature tag representing a contact between the first terminal A and the second terminal B is registered in a control domain in the system. When setup of a first voice media session between the first terminal A and the second terminal B is initiated, the registered first feature tag is detected and the first media session is detected and the first media session is routed via a circuit-switched domain.

Abstract: A method and arrangement in a telecommunication system for facilitating communications between a first terminal A configured to use a first session model and a second terminal B configured to use a second session model for media transportation. The first terminal A initiates a service capability check and in response, receives capability features of the second terminal B. Upon determining that the second terminal B uses the second session model, the first terminal A is reconfigured to use the second session model.

Abstract: A method and arrangement in a telecommunication system for facilitating communication between a first terminal A configured to use a first session model and a second terminal B configured to use a second session model for media transportation. A first feature tag representing a contact between the first terminal A and the second terminal B is registered in a control domain in the system. When setup of a first media session (Voice) between the first terminal A and the second terminal B is initiated, the registered first feature tag is detected, and the first media session is routed via a circuit-switched domain.