A SIP-Based Session Mobility Management Framework for Ubiquitous Multimedia Services

Enabling Network Convergence Through Contextual Session Mobility With IMS

“…A target device for a session transfer can be identified by a dedicated mobility server, or the triggering end-point itself can discover neighbouring endpoints. Mate et al distinguish among device-centric mechanisms (everything is implemented in the devices), network-centric mechanisms (everything is implemented by the network), and hybrid architectures [6].…”

“…P b,2 is the blocking probability of new and SM calls when i=C-C 1 and j<C 1 . The blocking probability P b,h is given by : (6) The blocking probability P b,ns is given by: (7) Hence, we have (8) From equation (8), we note that P b,ns ≥ P b,h . Moreover, when C 1 = 0, we have P b,ns = P b,h = ErlangB(A;C).…”

“…IETF RFCs discuss SIP (Session Initiation Protocol) mechanisms to implement the transfer of the end point of a multimedia communication from one device to another [2]. Academic research further investigates session mobility (SM), but it overlooks some IMS integration issues, such as how and why a session end-points are transferred, and how to discover, identify and authorize devices [3] [4][5] [6]. Implementation attempts are limited to trials and evaluation of the delays.…”