1. Main indicators of the system

　　(1) Coverage: The coverage of the GSM system and the coverage of the broadcasting and paging system

　　(2) System capacity: unlimited expansion with the expansion of the communication system used

　　(3) Positioning accuracy: ≤ 25 meters (without SA)

　　(4) Target speed: 0-515 meters/second, acceleration 6G

　　2. The main characteristics of the system:

　　(1) Reasonable selection of communication system, wide coverage area, low system investment, and high cost-effectiveness of on-board equipment: using a GPS system based on the GSM global communication digital mobile phone network, there is no need to install expensive communication systems specifically, and there is no need to worry about applying for frequency resources. Moreover, the coverage range is wide, and the user capacity is fully guaranteed. The cost of on-board equipment is relatively low, but the functions provided include GPS real-time positioning and monitoring, dispatch scheduling, anti-theft, anti robbery, information services, operational data collection, and on-board mobile phone functions that provide safe communication for driving.

　　(2) By combining with paging systems, low-cost information broadcasting, call and other services can be achieved in a large area. By combining with paging systems and utilizing low-cost public service communication systems, cost-effective information broadcasting services can be achieved in a large area, and can be used as an effective means for designated area car search calls.

　　(3) The Chinese character display screen is equipped to realize text Instruction scheduling and report response: after the on-board terminal is equipped with a LCD Chinese character mobile phone, in addition to GPS positioning monitoring, the management center can also issue text dispatching commands such as announcement and dispatch to the vehicle, or the vehicle can send report or response text information to the management center.

　　(4) It has the functions of collection, management, transmission and statistical analysis of operation information: it has an interface with the existing Taximeter on the vehicle, which can collect the operation data on the Taximeter, such as passenger carrying, passenger getting off, running mileage, no-load mileage, single charge, cumulative charge, and at the same time, it supplements the information provided by GPS and other acquisition circuits, such as the passenger getting off position, parking position, parking time, and driving time. This information will be promptly transmitted to the management centers of various taxi companies as required, and there are dedicated functional modules in the management center to conduct statistical analysis of these operational data, assisting in providing various intuitive data files such as statistical reports, histograms, pie charts, etc. for the company to analyze, improve operational efficiency, and understand operational conditions.

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