Power control for TDMA mobile satellite communication system
First Claim
1. For use in a communication system, a signal receiving unit comprising:
- a receiver for receiving incoming communication signals from a transmitting unit, the incoming communication signal having an associated signal quality value and an associated received signal strength, the incoming communication signals periodically comprising control signals including an upper threshold signal strength value, a lower threshold signal strength value, and a nominal signal quality value,a processor in communication with the receiver, the processor being adapted to (a) set a power control bit to a first value if the received signal strength is lower than the lower threshold signal strength value;
(b) to set the power control bit to a second value if the received signal strength is higher than the upper threshold signal strength value;
(c) to set the power control bit to the first value if the signal quality value is lower than the nominal signal quality value and the received strength signal is both higher than the lower threshold signal strength value and lower than the upper threshold signal strength value; and
, (d) to set the power control bit to the second value if the signal quality value is higher than the nominal signal quality value and the received strength signal is both higher than the lower threshold signal strength value and lower than the upper threshold signal strength value; and
,a transmitter in communication with the processor for transmitting the power control bit set by the processor to the transmitting unit.
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Accused Products
Abstract
A method and system for adjusting the transmission power of a transmitter during a communication with a receiver in a mobile satellite communication system is disclosed herein. The method comprises establishing at least one threshold signal strength value for a transmitted burst; measuring the received signal strength of the burst received by the receiver; comparing the received signal strength with the threshold value; and setting a power control bit based on the comparison. The system comprises a plurality of mobile terminals having a first stored threshold value; a satellite adapted to communicate with each of the mobile terminals; at least one gateway in communication with the satellite, the gateway having a second stored threshold value, and including a routine for measuring the received signal strength of a burst signal transmitted from the mobile terminal, for comparing the received signal strength with the second stored threshold value, and for adjusting the transmission power of the gateway based on the comparison; and each of the mobile terminals including a routine for measuring the received signal strength of a burst signal transmitted from the gateway to the mobile terminals, for comparing the received signal strength with the first stored threshold value, and for adjusting the transmission power of the mobile terminal based on the comparison.
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Citations
13 Claims
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1. For use in a communication system, a signal receiving unit comprising:
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a receiver for receiving incoming communication signals from a transmitting unit, the incoming communication signal having an associated signal quality value and an associated received signal strength, the incoming communication signals periodically comprising control signals including an upper threshold signal strength value, a lower threshold signal strength value, and a nominal signal quality value, a processor in communication with the receiver, the processor being adapted to (a) set a power control bit to a first value if the received signal strength is lower than the lower threshold signal strength value;
(b) to set the power control bit to a second value if the received signal strength is higher than the upper threshold signal strength value;
(c) to set the power control bit to the first value if the signal quality value is lower than the nominal signal quality value and the received strength signal is both higher than the lower threshold signal strength value and lower than the upper threshold signal strength value; and
, (d) to set the power control bit to the second value if the signal quality value is higher than the nominal signal quality value and the received strength signal is both higher than the lower threshold signal strength value and lower than the upper threshold signal strength value; and
,a transmitter in communication with the processor for transmitting the power control bit set by the processor to the transmitting unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification
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- Resources
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Current AssigneeHughes Network Systems LLC (Echostar Corporation)
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Original AssigneeHughes Electronics Corporation (AT&T, Inc.)
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InventorsMarquart, Robert Carroll, Malcolm, James Eryx, Morris, Adrian, Laborde, Enrique
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Primary Examiner(s)Eisenzopf, Reinhard J.
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Assistant Examiner(s)BANKS HAROLD, MARSHA DENISE
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Application NumberUS08/896,337Time in Patent Office382 DaysField of Search455/517, 455/524, 455/69, 455/70, 455/126, 455/88US Class Current455/69CPC Class CodesH04B 7/18543 for adaptation of transmiss...H04W 52/225 Calculation of statistics, ...H04W 52/228 using past power values or ...H04W 52/245 taking into account receive...H04W 52/248 where transmission power co...
