05119504 is referenced by 222 patents and cites 8 patents.

A subscriber unit for communicating with a satellite communication system. This subscriber unit receives and transmits digital data from satellites of a satellite communication system. In addition, the subscriber unit self-determines its own position and transmits this position to the satellites of the satellite communication system. In this way, the satellite communication sytem knows the position of each subscriber unit so that communications may be established more efficiently. In addition, the position of the subscriber unit is automatically determined from the received GPS signals and reported to the satellite communication system for other uses such as asset management and search and rescue operations.

Title
Position aided subscriber unit for a satellite cellular system
Application Number
7/554657
Publication Number
5119504
Application Date
July 19, 1990
Publication Date
June 2, 1992
Inventor
Isaac N Durboraw III
Scottsdale
AZ, US
Agent
Jordan C Powell
Frank J Bogacz
Assignee
Motorola
IL, US
IPC
H04B 7/185
G01S 5/02
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