Enhanced physical layer repeater for operation in WiMAX systems
First Claim
1. A method for repeating a signal transmitted from a first station to a second station using a repeater configured according to a Time Division Duplex (TDD) protocol, the first station communicating to the second station on a downlink and the second station communicating to the first station on an uplink, the method comprising:
- detecting the presence of the signal on one of the uplink and the downlink;
synchronizing the repeater to one or more time intervals associated with the detected signal, the one or more time intervals measured during an observation period to form one or more measured time intervals;
re-transmitting the signal from the second station to the first station if the signal is detected on the uplink; and
re-transmitting the signal from the first station to the second station, if the signal is detected on the downlink, wherein a first gain value associated with the downlink is used to establish a second gain value associated with the uplink.
3 Assignments
0 Petitions
Accused Products
Abstract
A method and repeater are described for repeating using a time division duplex (TDD) radio protocol. A signal is transmitted from a first station to a second station using a downlink and an uplink. The signal can be detected on the uplink or the downlink. The repeater can synchronize to time intervals associated with the detected signal that are measured during an observation period. The signal can be retransmitted from the second station to the first station if the signal is detected on the uplink and re-transmitted from the first station to the second station if the signal is detected on the downlink. A gain value associated with the downlink can be used to establish a gain value associated with the uplink.
492 Citations
34 Claims
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1. A method for repeating a signal transmitted from a first station to a second station using a repeater configured according to a Time Division Duplex (TDD) protocol, the first station communicating to the second station on a downlink and the second station communicating to the first station on an uplink, the method comprising:
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detecting the presence of the signal on one of the uplink and the downlink;
synchronizing the repeater to one or more time intervals associated with the detected signal, the one or more time intervals measured during an observation period to form one or more measured time intervals;
re-transmitting the signal from the second station to the first station if the signal is detected on the uplink; and
re-transmitting the signal from the first station to the second station, if the signal is detected on the downlink, wherein a first gain value associated with the downlink is used to establish a second gain value associated with the uplink. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A repeater repeating a signal transmitted from a first station to a second station, the repeater configured according to a Time Division Duplex (TDD) protocol, the first station communicating to the second station on a downlink and the second station communicating to the first station on an uplink, the repeater comprising:
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an antenna;
a detector coupled to the antenna, the detector configured to detect the presence of the signal in an interval associated with one of the uplink and the downlink; and
a processor coupled to the antenna and the detector, the processor configured to;
measure one or more time intervals during an observation period associated with the detected signal, the one or more time intervals measured during an observation period to form one or more measured time intervals;
synchronize the repeater to the one or more time intervals such that a first one or more of the measured time intervals corresponds to one or more uplink intervals and a second one or more of the measured time intervals corresponds to one or more downlink intervals. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A repeater for repeating a signal transmitted from a first station to a second station and from the second station to the first station, the repeater configured according to a Time Division Duplex (TDD) protocol, the first station communicating to the second station on a downlink and the second station communicating to the first station on an uplink, the repeater comprising:
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a first unit including;
a donor side antenna;
a first transmitter;
a first detector coupled to the donor side antenna, the detector configured to detect the presence of the signal in an interval associated with the downlink;
a first transmitter; and
a first processor coupled to the donor side antenna, the first detector, and the first transmitter, the first processor configured to;
measure a first one or more time intervals during an observation period associated with the detected signal, the first one or more time intervals measured during a first observation period to form first measured time intervals;
synchronize the repeater to the first one or more time intervals such that a first one or more of the first measured time intervals corresponds to one or more downlink intervals associated with the downlink; and
a second unit coupled to the first unit through a communications link, the second unit including;
a receptor side antenna;
a second detector coupled to the receptor side antenna, the second detector configured to detect the presence of the signal in an interval associated with the uplink;
a second transmitter; and
a second processor coupled to the receptor side antenna, the second detector, and the second transmitter, the second processor configured to;
measure a second one or more time intervals during an observation period associated with the detected signal, the second one or more time intervals measured during an observation period to form second measured time intervals;
synchronize the repeater to the second one or more time intervals such that a second one or more of the second measured time intervals corresponds to one or more uplink intervals associated with the uplink. - View Dependent Claims (31, 32, 33, 34)
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Specification