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: 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: According to a first aspect of the present invention there is provided a method of providing interactive IP Television to a user terminal 1 over an IP Multimedia Subsystem 2. The method comprises, at a content server 3, sending the IP Television content and an interactive object to the user terminal 1 via the IP Multimedia Subsystem 2. At the user terminal 1, displaying graphical components of the interactive object together with the IP Television content, accepting user input to the interactive object and sending the input to an evaluation server 4 via the IP Multimedia Subsystem 2. At the evaluation server 4, comparing the user input with answer information associated with the interactive object and sending a result of the comparison to the user terminal 1 via the IP Multimedia Subsystem 2.

Abstract: A method and apparatus for authentication in a communication network. A network node receives an initial request message from a user device, and sends an authentication message to an authentication node. In reply, the network node receives an expected response value and an authentication token from the authentication node. The expected response value is determined using a first shared secret known to the authentication node and the user and a second shared secret known to the authentication node and the user device, and the authentication token is determined using the second shared secret. The network node sends the authentication token from the network node to the user device, and in response receives a response value calculated using authentication token, the first shared secret and the second shared secret. The network node then determines if the response value matches the expected response value and, if so, authenticates the user.

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 of dynamically allocating a user to one of a pool of Application Servers within an IP Multimedia Subsystem network. The pool of Application Servers is configured to provision an IP Multimedia Subsystem service. The method comprises determining a level of historical use of said service by said user. The user is then allocated to an Application Server based upon said use and the current load distribution across the Application Servers.

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.