Importance

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Abstract

A method of facilitating access to services of an IP Multimedia Subsystem network by services located behind an access point to said network. The access point is associated with a subscription to the IP Multimedia Subsystem network. The method comprises including within an Implicit Registration Set defined for said subscription, a wildcarded Public Service Identity or Public Service Identity sub-domain representative of a range of Public Service Identities. At IP Multimedia Subsystem registration of said access point with the IP Multimedia Subsystem network, the Public Service Identities contained in the Implicit Registration Set are distributed to a Serving Call Session Control Function allocated to said access point and to a Proxy Call Session Control Function to which said access point is attached.

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First Claim