its智慧型運(yùn)輸系統(tǒng)-在線瀏覽
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【正文】 iver Warning CALM Commercial Services ? INFRASTRUCTURE Vehicle CALM enabled Commercial Services – INFRASTRUCTURE to ON BOARD EQUIPMENT ? Commercial Service Payments ? Commercial Vehicle Operations ? Enhanced Route Guidance and Navigation GPS Corrections JustInTime Repair Notification ? Map Downloads and Updates Optimal Speed Advisory ? Parking Space Identification/Navigation GPS Corrections Infotainment ? Intelligent OnRamp Metering (road management) ? Intelligent Traffic Lights (road management) ? Inter invehicle ? Instant Messaging ? Open Road (no barrier) Tolling ? Video Downloads ? Vehicle Vehicle CALM enabled Commercial Services ? Cross Vehicle Messaging ? In vehicle Inter Region Feature Notification CALM infrastructure The CALM concept at the highest level of abstraction The CALM Media CALM bines plementary media: ? For short and medium distances (directed): Infrared, MMWave ? For short and medium distances: Microwave GHz ? For long distances: GSM, UMTS ? CALM originated interfaces –ISO 21214 CALM InfraRed –ISO 21215 CALM M5 –ISO 21216 CALM Millimeter CALM originated interfaces ? This class of air interface has been specifically designed for CALM ? CALM originated interfaces should offer the highest performance interface at any particular frequency ? 5Ghz – GHz DSRC (dedicated short range munications) – The European Standard has been adopted and is now used in many countries including Australia, several countries in Asia and South America . ? Millimeter – Frequency range : 6263 GHz – High directionality – High data rates – It can also be used in conjunction with radar signals at similar frequencies. ? Infra red – Infra red is already used in tolling systems – High data rates and a relatively lightweight, paratively inexpensive, beacon infrastructure, with relatively high directionality. – The Standard supports current and future ITS applications with data rates from 1Mbit/s to 128Mbit/s ? The CALMIR medium provides virtually “continuous munications” even in the presence of interruptions of the link caused by physical barriers. ? Target domains of infrared are cartocar munication and directed munication to infrastructure facilities such as traffic signals, trafficsigns and informationbeacons. ? The link setuptime is usually less than one millisecond – important feature in safetyrelated cartocar munication ? Lowpower infrared beacons, in bination with solar panels, also enable also powerline independent roadside installation. CLAMIR application (German) ? German TruckTollingProject IR applicatio
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