RE-CHALLENGE COMMUNICATION CONTROL METHOD, SYSTEM THEREOF, PACKET TRANSFER ENABLED/DISABLED DECISION METHOD, PACKET TRANSFER DEVICE, PACKET TRANSFER SYSTEM, PACKET MONITORING METHOD, CALL CONTROL DEVICE, MONITOR DEVICE, AND PROGRAM

摘要

A terminal device transmits a packet firstly in a test class. When the communication quality is not sufficient, it is judged whether to perform re-trial in a trial class according to the packet communication amount of the priority class after a predetermined period of time. Moreover, there are provided a line capacity reference not discarding the test class packet and a line capacity reference not discarding the priority class packet. A test class packet exceeding the former is discarded but the packet which has once become a priority class will not be discarded unless the latter is exceeded.