Patent ID: 7882239
Filing Date: 2011-02-01
Classification: H04L

Abstract:
1. A method, in a Universal Mobile Telecommunications System (UMTS) communications network, of establishing a communications session between first and second devices associated with first and second parties respectively, the method comprising: sending a session request message from the first device to a Session Initiation Protocol (SIP) proxy server indicating a request to establish the session and comprising session information relating to the session; in response to the session request message, the SIP proxy server retrieving extended caller information and including the extended caller information in the session request message, the extended caller information being summary information, from which complete information can subsequently be determined by the second device, in a first database, synchronized with a related complete information in a second database for which the second device is registered, the complete information being stored in the first database and the summary information, derived from the complete information, being stored in the second database; synchronizing the summary information in the second database with the complete information in the first database, retrieving summary information from the second database for inclusion in the extended caller information to enable the subsequent retrieval of complete information from the first database relating to the summary information from the second database; the SIP proxy server sending the session request message to the second device; and establishing the communications session based on the session information and the extended caller information in the resulting session request message.