Patent ID: 7181230
Filing Date: 2007-02-20
Classification: G01S

Abstract:
1. A mobile unit information sharing system including a base station and multiple mobile stations carrying out wireless communications, the base station and each of the mobile stations including: a wireless installation for wireless communication among the base and mobile stations using a common wireless frequency; a time-sharing synchronous wireless modem device for receiving self-position information of the respective station through a GPS antenna, transmitting the self-position information to the other stations via the wireless installation, and receiving position information of the other stations from the wireless installation; and a position information display device for receiving self-position information and other station position information from the time-sharing synchronous wireless modem device and recording the position information received as shared data and displaying the position information on a map, wherein, the time-sharing synchronous wireless modem device comprises a GPS receiver part for receiving self-position information through the GPS antenna, a wireless modem part for modulating the self-position information received by the GPS receiver part to a data form used by the wireless installation and demodulating the other station position information received by the wireless installation from the data form used by the wireless installation, and a first computing part for transmitting the self-position information received from the GPS receiver part and the other station position information demodulated by the wireless modem part to the position information display device and transmitting the self-position information to the other stations via the wireless installation with transmission timing determined so that communication collisions do not occur, each station sharing position information by transmitting and receiving position information to and from the other stations.