Congestion control system, service edge node, guidance server, congestion control method, program therefor, and recording medium recorded therewith

摘要

In an edge region between an access network (8) for connection to an IP communication terminal of a subscriber via a gateway (9) and a core network (6) for providing the subscriber with an IP telephone service, a service edge node (1) and a guidance server (2) are disposed. The service edge node (1) controls a call initiation request received from the subscriber based on a congested state of the core network (6) and a priority given to the subscriber. The guidance server (2) transmits guidance to the subscriber without the intermediation of the core network (6).