| 摘要 |
PROBLEM TO BE SOLVED: To provide a mobile communication system by a three-step server method, wherein information acquisition processing is made efficient. SOLUTION: In this mobile communication system for performing information transmission between a vehicular server 100 carried in a train and a client server 300 on the ground through a communication server 200 and a ground server 400 functioning as interfaces between a wire LAN and a wireless LAN, a communication control part is provided in the communication server 200, and data transfer operation between the client server 300 and the communication server 200 is performed independently from data transfer operation between the vehicular server 100 and the communication server 200 including the ground server 400. COPYRIGHT: (C)2009,JPO&INPIT
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