EP 0843295 A1 19980520 - Roadside communication system
Title (en)
Roadside communication system
Title (de)
Strassenrandkommunikationsystem
Title (fr)
Système de communication de bord de route
Publication
Application
Priority
JP 30276596 A 19961114
Abstract (en)
Antennas 1a and 1b are located above each lanes of the road so that the antennas can communicate with mobile stations which are loaded on vehicles that approache the toll gate along each of the lanes. When a vehicle approaches the toll gate, a beacon detects the vehicle and requests an ID signal toward the mobile station that is loaded on the vehicle. In response, the mobile station transmits an ID signal on a radio frequency toward each of the antennas. Then, the beacon receives the ID signal with each antenna, and analyses the signal voltage levels. Then, the beacon selects an antenna which provided the highest voltage signal, and proceeds communication between the mobile station with the antenna of the highest level. <IMAGE>
IPC 1-7
IPC 8 full level
G07B 15/00 (2011.01); G08G 1/017 (2006.01); H04B 7/26 (2006.01); H04W 4/04 (2009.01); H04W 4/24 (2009.01); H04W 16/30 (2009.01)
CPC (source: EP)
G07B 15/063 (2013.01); G08G 1/017 (2013.01)
Citation (search report)
- [XA] EP 0567905 A2 19931103 - BOSCH GMBH ROBERT [DE]
- [X] EP 0613108 A1 19940831 - TEXAS INSTRUMENTS INC [US]
- [A] EP 0249951 A1 19871223 - SUMITOMO ELECTRIC INDUSTRIES [JP]
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0843295 A1 19980520; JP 2974972 B2 19991110; JP H10145288 A 19980529
DOCDB simple family (application)
EP 97120015 A 19971114; JP 30276596 A 19961114