Abstract: 〗Present call model and service view can not satisfy all complex controlling requirements required by multiparty multimedia services. A signaling and bearer separated call relation model (SBSCRM) of softswitch and a general service view (GSV) based on SBSCRM are proposed. SBSCRM/GSV, which is built on multiparty calls, supports the separation of signaling control and media control and provides three service views independently to the service logic: call party view, media link view, and media link relation view. Therefore, SBSCRM/GSV provides multigranularity control capabilities to service. GSV can be adapted to parlay/IN CV by adding a view translation layer between them. The softswitch system with SBSCRM illustrates the practicability and efficiency of SBSCRM/GSV.

Key words: softswitch, call relation model, service view, signaling session, media session