H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 7/04 (2006.01) G08G 1/0962 (2006.01) H04B 7/26 (2006.01) H04J 3/06 (2006.01) G07B 15/00 (2006.01)
Patent
CA 2228696
A road side communication equipment is provided crossing over lanes of an expressway, so that a communication processing for toll collection is executed between the road side equipment and an on-board equipment passing a communication area. The road side equipment sends signals using a 32-bit synchronizing signal for the start slot of each frame and a 16-bit synchronizing signal for subsequent slots of the frame. The on-board equipment receives this to perform signal receiving processing. The received communication signals are then digital-demodulated and entered to a shift register so that the bit pattern is compared in two comparators to detect the synchronizing signal. According to the output from AND circuits, the synchronizing signal is distinguished from the synchronizing signal to determine the received data and receive subsequent data.
Pour les fins de perception des péages, on a installé au-dessus des voies d'une autoroute un dispositif de communication permettant la transmission d'informations entre un dispositif routier et un autre dispositif embarqué à bord d'un véhicule qui traverse le secteur de transmission. Le dispositif routier transmet un signal de synchronisation de 32 bits pour le premier slot de chaque trame, puis un signal de synchronisation de 16 bits pour chacun des slots subséquents. Le dispositif installé dans le véhicule capte ces signaux, qui sont démodulés et entrés dans un registre à décalage. Deux comparateurs effectuent la comparaison de la configuration binaire pour détecter le signal de synchronisation. Les sorties d'un certain nombre de circuits ET permettent de distinguer les signaux de synchronisation les uns des autres et d'identifier les données déjà reçues et celles qui le sont par la suite.
Denso Corporation
Fetherstonhaugh & Co.
LandOfFree
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