Land mobile satellite-communication system
First Claim
1. A land mobile satellite communication system comprising:
- at least one communication satellite station;
a plurality of portable communication terminals for communicating with each other through a communication link to be formed to include said at least one communication satellite station; and
a plurality of mobile repeater stations mounted on mobiles located on the earth for repeating a communication in said communication link formed between said portable communication terminals and including said at least one communication satellite station, wherein;
each said mobile repeater station is operable with any of said portable communication terminals;
each said mobile repeater station includes a means for communicating with said at least one communication satellite station by using a carrier wave of higher frequency than a frequency of a carrier wave to be used for communicating with said portable communication terminals; and
a communication link between any specific one of the communication terminals and any specific one of said at least one communication satellite station can be established via a plurality of communication channels respectively including different ones of the mobile repeater stations.
1 Assignment
0 Petitions
Accused Products
Abstract
A land mobile-satellite communication system comprises: at least one communication satellite station; a plurality of portable communication terminals for communicating with each other through a communication link to be formed to include the at least one communication satellite station; and a plurality of mobile repeater stations mounted on mobiles located on the earth for repeating the communication in the communication link formed between the portable communication terminals and including the at least one communication satellite station. Preferably, the system includes a plurality of communication satellite stations, each mounted on a respective one of a plurality of low earth communication satellites, and each including a mechanism for communicating each other through inter-satellite links.
25 Citations
25 Claims
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1. A land mobile satellite communication system comprising:
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at least one communication satellite station; a plurality of portable communication terminals for communicating with each other through a communication link to be formed to include said at least one communication satellite station; and a plurality of mobile repeater stations mounted on mobiles located on the earth for repeating a communication in said communication link formed between said portable communication terminals and including said at least one communication satellite station, wherein; each said mobile repeater station is operable with any of said portable communication terminals; each said mobile repeater station includes a means for communicating with said at least one communication satellite station by using a carrier wave of higher frequency than a frequency of a carrier wave to be used for communicating with said portable communication terminals; and a communication link between any specific one of the communication terminals and any specific one of said at least one communication satellite station can be established via a plurality of communication channels respectively including different ones of the mobile repeater stations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A land mobile-satellite communication system comprising:
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a plurality of communication satellite stations respectively mounted on a plurality of low earth communication satellites and each said station including a means for communicating with other said stations through inter-satellite links; a plurality of portable communication terminals for communicating with each other through a communication link to be formed to include said communication satellite stations; and a plurality of mobile repeater stations mounted on mobiles located on the earth for repeating a communication in said communication link formed between said portable communication terminals and including said communication satellite stations;
whereinsaid portable communication terminals include a means for transmitting a position signal repeatedly, said position signal including an identification code of the portable communication terminals and a test pattern; said mobile repeater stations include a means for transmitting a repeated position signal to said communication satellite stations by adding a self identification code to said position signal received from said portable communication terminals; and said communication satellite stations include a means for selecting one of said mobile repeater stations which transmits said repeated position signal including the test pattern having a highest quality to be a mobile repeater station for the portable communication terminals.
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25. A land mobile satellite communication system comprising:
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a plurality of communication satellite stations respectively mounted on a plurality of low earth communication satellites and each said station including a means for communicating with other said stations through inter-satellite links; a plurality of portable communication terminals for communicating with each other through a communication link to be formed to include said communication satellite stations; and a plurality of mobile repeater stations mounted on mobiles located on the earth for repeating a communication in said communication link formed between said portable communication terminals and including said communication satellite stations;
whereinsaid mobile repeater stations include a means for communicating wit said communication satellite stations by using a carrier wave of higher frequency than a frequency of a carrier wave to be used for communicating with said portable communication terminals.
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Specification