To facilitate construction of a network, and to stably transmit information between a ground unit and an on-board unit without increasing the number of relay stations.
A plurality of access points 4a, 4b, 4c wire-connected to a ground unit 1 and provided for each station and a relay station 5 provided at a midpoint between stations are connected by a leaky coaxial cable 7, and the access points 4a, 4b, 4c and the relay station 5 construct a multi-hop connection wirelessly linked with an on-board radio station 6. Characteristics of multi-hop such that the access points 4a, 4b, 4c and the relay station 5 can secure a plurality of routing paths can be effectively utilized, a path between the ground unit 1 and the on-board unit 3 can be changed flexibly in response to failure occurrence or a radiowave environmental change, and thus, stability is improved.
COPYRIGHT: (C)2010,JPO&INPIT
| JP2003249889A | ||||
| JP11186943A | ||||
| JP2000102063A | ||||
| JP2008282188A | ||||
| JP2004282685A |
Kiyoshi Yasushima
Takanashi Norio
Motoki Shandong
Taku Ogawa
Murata Kensei
Moto Otani
Next Patent: METHOD AND DEVICE FOR HIGH FREQUENCY INDUCTION HEATING AND HIGH FREQUENCY INDUCTION HARDENING OF CRA...