COMMUNICATION RELAY APPARATUS, WIRELESS TERMINAL AND COMPUTER PROGRAM

摘要

In order to continue a communication by performing a handover across or between different communication systems, improvement in redundancy of a communication route and a delay time difference before and after switching the communication system is intended. A bicast entity 21 includes, when a wireless terminal 10 makes a connection and continues a communication across different communication systems 20 X and 20 Y, bicast means for delivering a packet for each communication route via each of the communication systems 20 X and 20 Y before and after switching the communication system to which the above described wireless terminal 10 connects, and control means for completing a relay of the packet when the switching of the communication system to which the above described wireless terminal 10 connects is completed.