Patent ID: 9185141
Filing Date: 2015-11-10
Classification: H04L,H04W

Abstract:
1. A method for managing an automatically established roaming agreement in a first Internet Protocol (IP) Multimedia Subsystem (IMS) network, the method being performed in a first edge proxy of the first IMS network and comprising: receiving a registration request of a user terminal via a second IMS network; sending, based on the registration request, a roaming information request indicating the second IMS network to a user database associated with the first IMS network; receiving, in response to the roaming information request and from the user database, a roaming information answer indicating information related to the roaming agreement; forwarding, based on the roaming information answer, the registration request to a second edge proxy of the first IMS network, wherein the second edge proxy is configured to manage the roaming agreement between the first and second IMS networks; sending a routing permission request to the user database, the routing permission request requesting permission for routing the registration request to a user registrar of the first IMS network; and receiving, in response to the routing permission request, a rejecting routing permission response from the user database rejecting the requested permission; wherein sending the roaming information request to the user database comprises sending the roaming information request to the user database in response to the received rejecting routing permission response.