Telefonaktiebolaget Lm Ericsson (publ)

Annika Jonsson

Johan Rune

Tony Larsson

Mattias Pettersson

Tobias Austrell

Timo Forsman

Jan Anders Tellinger

Nuria Esteban Vares

Philippe Charas

Berta Isabel Escribano Bullon

Marlene Yared

Andras Valko

Martin Körling

Ulf Björklund

Fergal Ladley

Mats Eneborg

András Mehes

A method of handling traffic within an IP Multimedia Subsystem, IMS, network. The method comprises registering an IMS user with a first Serving Call Session Control Function, S-CSCF, of the IMS network. Subsequently, at the first S-CSCF, a decision is made or instruction received to transfer said user to an alternative, second S-CSCF within the IMS network. A notification is sent from said first S-CSCF to a further IMS node, the notification including an explicit instruction to select a second S-CSCF and, upon receipt of said notification at the further IMS node, an S-CSCF reselection initiated for the user in order to select a second S-CSCF.

Traffic control within an IP multimedia subsystem

Embodiments of the present invention provide a network entity of an IMS network, in which a registered user is being served by an assigned Serving-Call Session Control Function, S-CSCF. The network entity includes a memory storing data that includes an identity of at least one better-matching S-CSCF in the IMS network having capabilities better suited for serving the registered user than the assigned S-CSCF. The network entity is configured to obtain an indication of the availability of the better-matching S-CSCF, and when the better-matching S-CSCF entity is available to initiate a transfer so that the registered user is served by the better-matching S-CSCF. The network entity may be the assigned S-CSCF, or may be an I-CSCF. Embodiments of the present invention provide a method of transferring a registered user to a better-matching S-CSCF.

Optimized user re-distribution over S-CSCF entities

A method of handling IP Multimedia Public Identity registration within an IP Multimedia Subsystem network. The method comprises receiving at a Call Session Control Function a SIP REGISTER message including a completed IP Multimedia Public Identity Attribute-Value-Pair and no IP Multimedia Private Identity. The method further comprises deriving at the Call Session Control Function an IP Multimedia Private Identity using the IP Multimedia Public Identity and sending a Cx query from the Call Session Control Function to a Home Subscriber Server, the query including the IP Multimedia Public Identity and the derived IP Multimedia Private Identity. The Home Subscriber Server identifies a subsubscription using the IP Multimedia Public Identity, and determines that the derived IP Multimedia Private Identity is not associated with said subscription. The HSS the identifies a default IP Multimedia Private Identity associated with subscription associated with said subscription, and returns a Cx response to said Call Session Control Function including said default IP Multimedia Private Identity. The Call Session Control Function uses the received, default IP Multimedia Private Identity to further handle said SIP message.

IP multimedia subsystem user identity handling

Methods and techniques for selective service access are described. A short range, wireless device establishes lists of available devices within its transmitting proximity that are able to provide a desired service. The lists can be ranked based upon a service profile, e.g., established by the device user. The lists can also be periodically updated to accommodate device mobility.

Method and apparatus for selective service access

A method and apparatus for providing selective access to a network, between an end device and a network such as the Internet through one or more access network terminating devices includes determining an access capability for each access network terminating device and comparing the access capability with a preferred access capability associated with a user preference. Best access is determined based on a comparison of the capabilities of the access network terminating devices and the preferred capabilities. Once a match is found, one of the access network terminating devices is selected based on the comparison and the end device is configured according to the access capability of the selected one of the access network terminating devices. Access capabilities include, for example, cost of access, coverage area, and QoS. While communicating with the network the end device continues to detect if new access network terminating devices are available. The access capability for each of the new access network terminating devices is determined and compared with the preferred access capability and/or the current access capabilities being provided to the end device. One of the new access network terminating devices can be selected based on the comparison and the end device configured according the access capability of the new access network terminating device.

Method and apparatus for selective network access

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Enskede, Sweden

Annika Jonsson