METHODS AND APPARATUS FOR UPLINK FRAME SYNCHRONIZATION IN A SUBSCRIBER STATION
First Claim
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1. A method for uplink frame synchronization, the method being implemented by a subscriber station, the method comprising:
- recording a first time stamp corresponding to a first downlink frame;
recording a second time stamp corresponding to a second downlink frame;
using the first time stamp and the second time stamp to determine a propagation delay change; and
adjusting uplink transmission timing based on the propagation delay change.
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Abstract
A method for uplink frame synchronization in a subscriber station may include recording a first time stamp corresponding to a first downlink frame and recording a second time stamp corresponding to a second downlink frame. The first time stamp and the second time stamp may be used to determine a propagation delay change. Uplink transmission timing may be adjusted based on the propagation delay change that is determined.
46 Citations
39 Claims
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1. A method for uplink frame synchronization, the method being implemented by a subscriber station, the method comprising:
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recording a first time stamp corresponding to a first downlink frame; recording a second time stamp corresponding to a second downlink frame; using the first time stamp and the second time stamp to determine a propagation delay change; and adjusting uplink transmission timing based on the propagation delay change. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A subscriber station that performs uplink frame synchronization, comprising:
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a downlink timing monitor that records a first time stamp corresponding to a first downlink frame and a second time stamp corresponding to a second downlink frame; a timing change calculator that uses the first time stamp and the second time stamp to determine a propagation delay change; and an uplink frame synchronizer that adjusts uplink transmission timing based on the propagation delay change. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A subscriber station that performs uplink frame synchronization, comprising:
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means for recording a first time stamp corresponding to a first downlink frame; means for recording a second time stamp corresponding to a second downlink frame; means for using the first time stamp and the second time stamp to determine a propagation delay change; and means for adjusting uplink transmission timing based on the propagation delay change. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A computer-program product for uplink frame synchronization performed by a subscriber station, the computer-program product comprising a computer readable medium having instructions thereon, the instructions comprising:
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code for recording a first time stamp corresponding to a first downlink frame; code for recording a second time stamp corresponding to a second downlink frame; code for using the first time stamp and the second time stamp to determine a propagation delay change; and code for adjusting uplink transmission timing based on the propagation delay change. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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Specification