Multiplex communications – Communication over free space – Repeater
Patent
1996-04-08
1998-08-18
Safourek, Benedict V.
Multiplex communications
Communication over free space
Repeater
370344, 370324, 370350, 455427, 455 121, 455450, H04B 7185, H04T 400
Patent
active
057967261
ABSTRACT:
In a time division multiple access (TDMA) satellite radiotelephone communications system, a radiotelephone communicates random access channel radiotelephone communications signals to a satellite over a dedicated random access channel uplink carrier frequency band. In response, a time division multiple access channel on a time division multiplexed uplink carrier frequency band different from the dedicated random access channel uplink carrier frequency band is assigned. The radiotelephone communicates time division multiplexed radiotelephone communications signals to the satellite over the allocated time division multiple access channel. Random access channel radiotelephone communications signals may be communicated to the satellite from a first radiotelephone over a first dedicated random access channel uplink carrier frequency band or from a second radiotelephone over a second dedicated random access channel uplink carrier frequency band different from said first dedicated random access channel uplink carrier frequency band. For a system in which the satellite communicates radiotelephone communications signals to radiotelephones located in a first coverage area and communicates radiotelephone communications signals to radiotelephones located in a second coverage area, random access channel radiotelephone communications signals may be communicated over a first dedicated random access uplink carrier frequency band if the radiotelephone is located in the first coverage area or communicating random access radiotelephone communications signals over a second dedicated random access channel uplink carrier frequency band different from the first dedicated random access uplink carrier band if the radiotelephone is located in the second coverage area.
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Hassan Amer
Massengill Larry W.
Ramesh Rajaram
Reinhold Stanley L.
Wang Yi-Pin Eric
Ericsson Inc.
Rao Seema S.
Safourek Benedict V.
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