COMMUNICATION PATH CONTROL APPARATUS, WIRELESS COMMUNICATION APPARATUS, COMMUNICATION PATH CONTROL METHOD AND COMMUNICATION METHOD OF WIRELESS COMMUNICATION APPARATUS

摘要

A switching server (100) relays a VoIP packet transmitted from a portable telephone terminal (300A) toward an IP telephone terminal (42), and successively acquires receiving times when the VoIP packets are received from the portable telephone terminal (300A). Furthermore, based on the acquired receiving times, the switching server (100) switches a communication path (R1) passing through a wireless IP network (10A) to a communication path (R2) passing through a wireless IP network (10B).