ROUTER DEVICE, AND DATAGRAM TRANSFER METHOD AND COMMUNICATION SYSTEM THEREOF

摘要

PROBLEM TO BE SOLVED: To accelerate hands-off control that accompanies movement by connecting and switching plural radio base stations, transferring datagram based on information about routing of a stored network layer and updating the information about routing at the time of detecting that a mobile terminal moves among radio base stations. SOLUTION: Mobile correspondence router devices (MSR) 220 and 221 are connected to an IP terminal 225 via a gateway(GW) 223 and the internet 224 and perform switching processing of an ATM cell with plural radio base stations. Also, the MSRs 220 and 221 each has functions, such as the management and storage of positional information, paging start and response, control of the detection and execution, etc., of responses, hands-off start decision processings, executions, etc. When the MSRs 220 and 221 detect that a mobile terminal 201 moves among radio base stations 202, 203 and 211, each stored information is updated. Thus, it is possible to perform hands-off control faster than an internet system.