METHOD OF ESTABLISHING UPLINK IN MOBILE SATELLITE COMMUNICATION SYSTEM
First Claim
1. A method of establishing an uplink in a satellite of a mobile satellite communication system, the method comprising:
- receiving a random uplink access signal from terminals included in a coverage of a satellite beam;
estimating a location of each of the terminals;
calculating an uplink transmission point in time when each of the terminals transmits an uplink signal, based on the estimated location of each of the terminals;
transmitting, to each of the terminals, the calculated uplink transmission point in time; and
receiving the uplink signal from each of the terminals at the calculated uplink transmission point in time.
1 Assignment
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Accused Products
Abstract
Provided is a method of establishing an uplink in a mobile satellite communication system, the method including: receiving a random uplink access signal from terminals included in a coverage of a satellite beam; estimating a location of each of the terminals; calculating an uplink transmission point in time when each of the terminals transmits an uplink signal, based on the estimated location of each of the terminals; transmitting, to each of the terminals, the calculated uplink transmission point in time; and receiving the uplink signal from each of the terminals at the calculated uplink transmission point in time.
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Citations
16 Claims
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1. A method of establishing an uplink in a satellite of a mobile satellite communication system, the method comprising:
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receiving a random uplink access signal from terminals included in a coverage of a satellite beam; estimating a location of each of the terminals; calculating an uplink transmission point in time when each of the terminals transmits an uplink signal, based on the estimated location of each of the terminals; transmitting, to each of the terminals, the calculated uplink transmission point in time; and receiving the uplink signal from each of the terminals at the calculated uplink transmission point in time. - View Dependent Claims (2, 3, 4, 5)
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6. A method of establishing an uplink in a terminal of a mobile satellite communication system, the method comprising:
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transmitting a random uplink access signal to a satellite; receiving, from the satellite, downlink control information that includes an uplink transmission point in time of a corresponding terminal; verifying the uplink transmission point in time; and transmitting an uplink signal to the satellite at the uplink transmission point in time. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A method of establishing an uplink in a satellite of a mobile satellite communication system, the method comprising:
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receiving a random uplink access signal from terminals included in a coverage of a satellite beam; estimating a location of each of the terminals; transmitting location information associated with the terminals to the terminals using downlink control information; and receiving a synchronized uplink signal from each of the terminals. - View Dependent Claims (13, 14)
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15. A method of establishing an uplink in a terminal of a mobile satellite communication system, the method comprising:
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transmitting a random uplink access signal to a satellite; receiving, from the satellite, downlink control information that includes location information associated with terminals included in a coverage of a satellite beam; verifying the location information; calculating a delay time of a farthest terminal from the satellite and a delay time of a corresponding terminal; and calculating a difference between the delay time of the farthest terminal and the delay time of the corresponding terminal; and transmitting an uplink signal to the satellite by delaying the uplink signal by the calculated difference. - View Dependent Claims (16)
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Specification