RADIO VOIP SYSTEM, RADIO BASE STATION DEVICE, AND AUTHENTICATION MANAGEMENT CONTROL METHOD USED THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a radio VoIP system capable of maintaining a telephone call (VoIP channel) even when access points change as a radio terminal in a train moves.

SOLUTION: Access controllers 22 and 32 in radio base station devices 2 and 3 are connected to an intranet 100 through L3 switches 21 and 31, and connected to an L3 switch 13 of a center station device in a tunnel mode. The access controllers 22 and 32 connected to access points 41 to 44 perform tunneling up to the center station device 1 through the L3 switches 21 and 31 to continue voice communication as if the train radio terminal 5 were in the segment of the center station device 1.

COPYRIGHT: (C)2007,JPO&INPIT