METHOD AND SYSTEM FOR DETECTING A MOVING VEHICLE WITHIN A PREDETERMINED AREA
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Accused Products
Abstract
The system allows a reliable and automatic detection of moving vehicles and advantageously also identification of the moving vehicles. A WPAN node device (advantageously a ZigBee node device) is installed on a vehicle to be detected when the vehicle is moving. Three WPAN node devices (advantageously three ZigBee node devices) are installed on the ground. One of the three WPAN node devices has a wide radio coverage area and acts as an “exciter” of the vehicle WPAN node device. Another one of the three WPAN node devices has a wide radio coverage area and acts as the “parent” of the vehicle WPAN node device. A further one of the three WPAN node devices has a narrow radio coverage area and acts as a “detector” of the vehicle WPAN node device. The three radio coverage areas are sized and located so that a moving vehicle to be detected enters the area of the “exciter” before entering the area of the “parent” and before entering the area of the “detector”. After detection, the system provides for sending information to a fourth WPAN node device present in a user mobile telephone terminal.
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Citations
44 Claims
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1-22. -22. (canceled)
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23. A method for detecting a moving vehicle within a predetermined area by means of at least a first wireless personal area network node device and a second wireless personal area network node device and a third wireless personal area network node device, wherein said moving vehicle carries a vehicle wireless personal area network node device, wherein said first wireless personal area network node device and said second wireless personal area network node device and said third wireless personal area network node device belong to one wireless personal area network, wherein said first wireless personal area network node device covers a first area and said second wireless personal area network node device covers a second area corresponding to said predetermined area and said third wireless personal area network node device covers a third area, said first and second and third areas being sized and located so that a vehicle to be detected enters said first area before entering said third area and before entering said second area, comprising the steps of:
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A) when entering said first area with said vehicle, said vehicle wireless personal area network node device discovers said wireless personal area network through said first wireless personal area network node device and prepares for joining said wireless personal area network through said third wireless personal area network node device; B) when entering said third area with said vehicle, said vehicle wireless personal area network node device joins said wireless personal area network through said third wireless personal area network node device; and C) when entering said second area with said vehicle, said vehicle wireless personal area network node device transmits information to said second wireless personal area network node device; whereby the detection of said moving vehicle within said predetermined area corresponds at least to the reception of said information by said second wireless personal area network node device. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. A system for detecting moving vehicles within a predetermined area comprising:
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a first wireless personal area network node device capable of covering a first area and belonging to a wireless personal area network; a second wireless personal area network node device capable of covering a second area belonging to said wireless personal area network, said second area corresponding to said predetermined area; a third wireless personal area network node device capable of covering a second area belonging to said wireless personal area network; and a vehicle wireless personal area network node device capable of being carried by a vehicle, said first and second and third areas being sized and located so that a vehicle to be detected enters said first area before entering said third area and before entering said second area, and said wireless personal area network node devices capable of being arranged so that; when said vehicle enters said first area, said vehicle wireless personal area network node device discovers said wireless personal area network through said first wireless personal area network node device and prepares for joining said wireless personal area network through said third wireless personal area node device, when said vehicle enters said third area, said vehicle wireless personal area network node device joins said wireless personal area network through said third wireless personal area network node device, and when said vehicle enters said second area, said vehicle wireless personal area network node device transmits information to said second wireless personal area network node device, whereby the detection of said moving vehicle within said predetermined area corresponds at least to the reception of said information by said second wireless personal area network node device. - View Dependent Claims (39, 40, 41, 42, 43, 44)
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Specification