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.

1 . A tracking system for a cell phone with a positioning device to transmit longitudinal and latitudinal coordinates contained in a plurality of position coordinate signals obtained from a global positioning system (GPS) from a tracked end to a tracking end via the short message service (SMS), comprising: 
 a GPS receiving module for receiving the position coordinate signals transmitted from a plurality of satellites;    a central processing unit (CPU) for converting the position coordinate signals into the longitudinal and latitudinal coordinates, and encoding and decoding a positioning short message containing the longitudinal and latitudinal coordinates; and    a global system for mobile (GSM) communications module for transmitting and receiving the positioning short message.    
     
     
         2 . The tracking system for a cell phone with a positioning device of  claim 1  further comprising: 
 an input module for receiving a plurality of settings from an user;    a display module for displaying the longitudinal and latitudinal coordinates on the cell phone; and    a memory for recording the positioning short messages.    
     
     
         3 . The tracking system for a cell phone with a positioning device of  claim 1 , wherein the positioning short message includes a format with the fields of: 
 a header, filled with the code of a series of special characters so as to indicate the positioning short message is a special format;    a status, filled with a code representing a corresponding situation;    a name, filled with a name representing the user;    a phone number, recording the phone number of the user;    a coordinate, recording the longitudinal and latitudinal coordinates of the cell phone's current position; and    a checksum, filled with a checksum code so as to prevent from receiving an erroneous short message during a transmission process.    
     
     
         4 . The tracking system for a cell phone with a positioning device of  claim 3 , wherein the name is keyed in by the user and stored in the memory module.  
     
     
         5 . The tracking system for a cell phone with a positioning device of  claim 1 , wherein the positioning short message is obtained from a tracking short message sent from an allowed tracking end.  
     
     
         6 . The tracking system for a cell phone with a positioning device of  claim 5 , wherein the tracking short message includes a format with the fields of: 
 a header, filled with the code of a series of special characters so as to indicate the tracking short message is a special format;    a status, filled with a code representing a corresponding situation;    a name, filled with a name representing the user;    a phone number, recording the phone number of the user; and    a checksum, filled with a checksum code so as to prevent from receiving an erroneous short message during a transmission process.    
     
     
         7 . The tracking system for the cell phone with a positioning device of  claim 6 , wherein the name is keyed in by the user and stored in the memory module.  
     
     
         8 . The tracking system for a cell phone with a positioning device of  claim 1 , wherein the display module displays the coordinates in a geographic information system (GIS) installed in the cell phone.  
     
     
         9 . A tracking method for a cell phone with a positioning device, comprising: 
 receiving a position coordinate signal transmitted from a GPS by a tracked end;    converting the position coordinate signal into longitudinal and latitudinal coordinates;    encoding the longitudinal and latitudinal coordinates into a positioning short message;    transmitting the positioning short message to a tracking end; and    obtaining and decoding the positioning short message by the tracking end to obtain the longitudinal and latitudinal coordinates of the tracked end.    
     
     
         10 . The tracking method of  claim 9 , wherein the positioning short message includes a format with the fields of: 
 a header, filled with the code of a series of special characters so as to indicate the positioning short message is a special format;    a status, filled with a code representing a corresponding situation;    a name, filled with a name representing the user;    a phone number, recording the phone number of the user;    a coordinate, recording the longitudinal and latitudinal coordinates of the cell phone's current position; and    a checksum, filled with a checksum code so as to prevent from receiving an erroneous short message during a transmission process.    
     
     
         11 . The tracking method of  claim 10 , wherein the name is keyed in by the user and stored in a memory module.  
     
     
         12 . The tracking method of  claim 9 , wherein the tracking end is a trackable phone number recorded in the memory module.  
     
     
         13 . The tracking method of  claim 9 , wherein the tracking end has to send a tracking short message to obtain a tracking permission from the tracked end before obtaining the positioning short message from the tracked end.  
     
     
         14 . The tracking method of  claim 13 , wherein the tracking short message includes a format with the fields of: 
 a header, filled with the code of a series of special characters so as to indicate the tracking short message is a special format;    a status, filled with a code representing a corresponding situation;    a name, filled with a name representing the user;    a phone number, recording the phone number of the user; and    a checksum, filled with a checksum code so as to prevent from receiving an erroneous short message during a transmission process.    
     
     
         15 . The tracking method of  claim 14 , wherein the name is keyed in by the user in advance and stored in the memory module.  
     
     
         16 . The tracking method of  claim 13 , wherein the positioning short message is transmitted automatically to the tracking end once the tracking short message is received by the tracked end and the tracking permission is confirmed.