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  Tracking method for cell phone with positioning device and system thereofUSPTO Application #: 20060170588Title: Tracking method for cell phone with positioning device and system thereof Abstract: A tracking method for a cell phone with a positioning device and the system thereof are described. The longitudinal and latitudinal coordinates of a tracked end in a global positioning system (GPS) are sent to a cell phone of a tracking end via a short message service (SMS). After decoding the short message contents, the longitudinal and latitudinal coordinates are displayed in a geographic information system (GIS) installed in the cell phone. (end of abstract)
Agent: Rabin & Berdo, PC - Washington, DC, US Inventor: Jien-Yang Chang USPTO Applicaton #: 20060170588 - Class: 342357100 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20060170588. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This non-provisional application claims priority under 35 U.S.C. .sctn. 119(a) on Patent Application No(s). 941102945 filed in Taiwan, R.O.C. on Jan. 31, 2005, the entire contents of which are hereby incorporated by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of Invention [0003] The invention relates to a tracking method for a cell phone with a positioning device and the system thereof. In particular, the invention utilizes the SMS (Short Message Service) to transmit the position coordinates from a GPS. [0004] 2. Related Art [0005] With rapid development in the cell phone technology, a new function is added to cell phones every now and then. It has evolved from old black-and-white phones to the current color phones, from monotonic bells to the current musics, the packet transmission for WAP web surfing and general packet radio services (GPRS). The cell phone can even record videos just like the DV. In spite of its many functions, the most basic two functions of the cell phones have been existent all the time: conversation and transmiting short messages. [0006] According to statistics, the popularity of cell phones in Taiwan has topped the world. Therefore, the cell phone has become an indispensable tool. Each person has at least one cell phone on the average. A valueable function in the cell phone is to allow the user to find out its position from the closest three base stations by trigonometry. Moreover, geographical information such as food, banks, movie theaters, etc can be transmitted to the user. Sometimes, the base station covers a range of as wide as several kilometers. The error can be as large as hundreds of meters. Thi does not provide the required precision. [0007] Due to recent progress in IC designs and chip productions, manufacturers have developed a global positioning system (GPS) with a small-size chip. Imbedding such a chip in a cell phone enables the cell phone to enjoy the GPS functions. The consumers do not need to spend several hundreds of dollars to carry an additional GPS receiver. SUMMARY OF THE INVENTION [0008] In view of the foregoing, an object of the invention is providing a tracking method for a cell phone with a GPS and the system thereof. The longitudinal and latitudinal coordinates in the global positioning system (GPS) positioned by a tracking end are sent to a smart phone thereof via the short message service (SMS). After decoding the short message contents, the longitudinal and latitudinal coordinates are applied to a geographic information system (GIS) to obtain the position of the other party. [0009] To achieve the above object, the disclosed tracking system for the cell phone with a positioning device includes a GPS receiving module, a global system for mobile (GSM) communications module, an input module, a central processing unit (CPU), a -display module, and a memory module. [0010] The GPS receiving module receives the position coordinate signals transmitted from the satellites. The GSM communication module sends out the longitudinal and latitudinal coordinates in the SMS. The input module receives settings given by the user. The CPU converts the position coordinate signals into longitudinal and latitudinal coordinates, encodes them into a positioning short message, decodes the coordinates contained in the positioning short message, and determines whether the tracking short message allows tracking. The display module displays the coordinates in the short message on a normal cell phone. If it is a smart phone, then the position of the tracked end can be directly displayed on a map. The position of the user also can be displayed. The memory module stores a phone book and the record of short message transmissions. [0011] Besides, the disclosed tracking method for the cell phone with a positioning device includes the following steps. When a tracking end sends out a tracking short message, the tracked end would receive this short message and checks its source cell phone number to determine whether the tracking is allowed. If it is not a trackable cell phone number, the short message is directly deleted. If it is set as a trackable cell phone number, then the GPS receiving module starts receiving position coordinate signals from the satellites, then the GPS converts the position coordinate signals into longitudinal and latitudinal coordinates, encoding them into a positioning short message, and sending out the positioning short message back to the tracking end. In the end, the tracking end obtains the positioning short message and thus the longitudinal and latitudinal coordinates of the tracked end. BRIEF DESCRIPTION OF THE DRAWINGS [0012] The invention will become more fully understood from the detailed description given hereinbelow illustration only, and thus are not limitative of the present invention, and wherein: [0013] FIG. 1 shows the system structure of the invention; [0014] FIG. 2 is a flowchart of the disclosed method; [0015] FIG. 3 shows an embodiment of the invention; [0016] FIG. 4 is a flowchart of the method for tracking; [0017] FIG. 5 is a flowchart of the method of positioning; [0018] FIG. 6-a shows the format of a tracking short message according to the invention; and [0019] FIG. 6-b shows the format of a positioning short message according to the invention. DETAILED DESCRIPTION OF THE INVENTION Continue reading... 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