METHOD TO SUPPORT GUEST USERS IN AN IMS NETWORK

摘要

A method and system for in an IMS network wherein a service provider can allow guest users who are not subscribers of the service provider to access its IMS core network and place calls to its subscribers. A session ID is associated with a specific call and exchanged between the guest user and a Border Gateway in the IMS core network. Allowed calls are restricted to certain features of the IMS core network and the SP can insure that calls can only be placed to subscribers who have agreed to accept the calls without keeping any guest information in the SP network and complex authorization sequence by subscriber. In addition, the service provider can prevent malicious guest users from gaining access to the IMS core by first requesting to call one subscriber, and then changing data in subsequent call signaling messages to call a different user number free of charge.

主权项

1. A method, executed in a Border Gateway (BGW), for allowing guest users to access an IMS network comprising the steps of:
a. receiving a guest call request from a service provider (SP), the guest call request initiated by a non-subscriber of said SP, said guest call request comprising at least an identification of a called SP subscriber; b. returning a session ID and a universal resource locater (URL) of the BGW, wherein the session ID is associated with the called SP subscriber; c. receiving a message from the non-subscriber to connect to the called SP subscriber, said message comprising at least the session ID; d. determining that the session ID in the message matches the session ID associated with the called SP subscriber in step b; and e. if they match, initiating a call to the SP subscriber in the IMS network.