Telefonaktiebolaget Lm Ericsson (publ)

Jonas Falkenå

Timo Forsman

Per Roos

Hubert Przybysz

Christer Boberg

Andreas Anulf

Tomas Holm

Cormac Hegarty

John Baldwin

Andreas Lindqvist

Bo Âström

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

Routing of sessions to other communication networks

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.

Call routing for IP multimedia subsystem users

A service indication mechanism is described for use by IP Multimedia Subsystem, IMS, codes () of an IMS network () in routing a terminating call in a network comprising a circuit switched, CS, network () and an IMS network (). On receipt of a Service Initiation Protocol, SIP, message from a second IMS node (), the SIP message including a called user number associated with the call (A), a SIP Uniform Resource Identifier, URI, and the call services for the called user from a user profile database is retrieved (A). 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 (A), the SIP message is transmitted with the second SIP-URI to a third IMS node (). On receiving the transmitted SIP message, the third IMS node () detects whether the service indicator is included in the SIP URI, and applies the service indicator to a plurality of policy rules for indicating whether the terminating call should be routed to the CS network () and whether to suppress insertion of a prefix to a CS routing number of the called user. The third IMS node () transmits to a CS node () a SIP message including the CS routing number without the prefix when a routing policy rule associated with the service indicator indicates suppression of the prefix (B).

Service domain selection service indicator

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.

Subscription handling for the IP multimedia subsystem

Instead of rejecting an incoming request at a node of a SIP domain, e.g. an IMS domain, when a user database query has failed, it is determined whether the DNS domain name of the request is registered as a shared domain or not. If it is found that the DNS domain name is registered as a shared domain, the DNS domain name is resolved into a globally routable URI, and the request is routed towards the terminating entity. If, however, the DNS domain name is not shared, the request is rejected. Such a mechanism enables operators to allow for a DNS domain name to be utilized by more than one SIP domain.

Shared DNS domain handling

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.

IP multimedia subsystem user identity handling method and apparatus

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.

IP multimedia service provision

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.

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Huddinge, Sweden

Jonas Falkenå