Patent Document ID: 9794356
Application ID: 13978155

Base Claim:
1. A method of implementing policy management in an IP Multimedia Subsystem, the method comprising: adding a user as a member of a group, the group defined by a Group Document that is managed by a XML Document Management Server that identifies the members of the group and includes policies that are applicable to the group, wherein policies that are applicable to the group is determined by combining policies of related groups identified within the Group Document with a users' group of the Group Document, wherein the combining policies with the policies of the identified related groups comprises any of: if a policy of the user's group contradicts a corresponding policy of a superior one of the identified related groups, overriding the policy of the user's group with the policy of the superior related group; and if a policy included in the user's group is narrower than a corresponding policy of a one of the identified related groups, overriding the policy of the superior related group with the policy of the user's group; when making a policy decision that is to be applied to the user, taking into account the dynamic data included in the Group Document, which includes data for the related groups; wherein the policies included in the Group Document comprise a maximum number of session in which members of the group are allowed to participate simultaneously; wherein the dynamic data comprises the number of sessions in which members of the group are participating.

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Claim 3:
3. The method of claim 1 , wherein the making a policy decision that is to be applied to the user comprises: retrieving policies and dynamic data from the Group Document; and evaluating the policies using the dynamic data.