Patent ID: 9083744
Filing Date: 2015-07-14
Classification: H04L

Abstract:
1. Multimedia subsystem, IMS, comprising: multiple domains, each domain containing a set of call session control function elements, CSCF, configured to send a signaling message (m) between a first communication client (T) connected to said multimedia subsystem and at least one second communication client, a federating functional element (FF) implemented by a distributed hashing table, the federating functional element being configured to, said at least one second communication client is connected to said multimedia subsystem or remote and accessible through an interrogating functional element, I-CSCF, contained in each domain, and the I-CSCF in each domain is configured to send the signaling message to an I-CSCF of a neighboring domain based on a physical address of an I-CSCF of a domain in which the second communication client is connected.