COMMUNICATION SYSTEM, AND PATH CONTROL METHOD

摘要

An object is to provide a communication system that can avoid a service interruption caused by a device failure, a congestion and the like inside a cell phone system. The communication system according to the present invention includes a data transfer apparatus (11), a gateway (12) for communicating with the data transfer apparatus (11), a gateway (13) that is an alternative apparatus of the gateway (12), and a path control apparatus (14) for controlling a communication path between the data transfer apparatus (11) and the gateways (12) and (13). When the path control apparatus detects a failure condition in the gateway (12), the path control apparatus controls the data transfer apparatus (11) to transfer data that is transferred from the data transfer apparatus (11) to the gateway (12) to the gateway (13) and also notifies the gateway (13) of session information that is set to the gateway (12).