Methods and systems for providing enhanced position location in wireless communications
First Claim
1. A method for wireless communications, comprising:
- receiving a pilot signal and a reference signal in a time slot, wherein the reference signal is received in lieu of at least a portion of traffic data over a traffic channel, the reference signal comprising a sequence of symbols known to a receiver; and
performing a position-location measurement based on the pilot signal and the reference signal.
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Accused Products
Abstract
Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g., data) transmission by a “known” transmission (or “reference transmission”) at a predetermined time known to access terminals in the corresponding sectors. The access terminals may use the received reference transmission to perform a position-location measurement, and report back the measured information. The access point may also send a reference transmission on demand, e.g., in response to a request from an access terminal in need for a location-based service.
55 Citations
38 Claims
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1. A method for wireless communications, comprising:
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receiving a pilot signal and a reference signal in a time slot, wherein the reference signal is received in lieu of at least a portion of traffic data over a traffic channel, the reference signal comprising a sequence of symbols known to a receiver; and performing a position-location measurement based on the pilot signal and the reference signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for wireless communications, comprising:
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means for receiving a time slot having a pilot signal and a reference signal, wherein the reference signal is received in lieu of at least a portion of traffic data over a traffic channel; and means for performing a position-location measurement based on the pilot signal and the reference signal. - View Dependent Claims (9)
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10. A method for wireless communications, comprising:
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receiving a pilot signal and a portion of a control channel, wherein information received over the portion of the control channel is known at a receiver prior to being received; and performing a position-location measurement based on the pilot signal and the portion of the control channel. - View Dependent Claims (11)
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12. A method for wireless communications, the method comprising steps of:
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receiving a time slot comprising a pilot channel and at least one other channel, wherein the pilot channel comprises a pilot signal, and the at least one other channel comprises a reference signal having information which is known at a receiver prior to being received; and performing a position-location measurement based at least on the reference signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A wireless device comprising:
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at least one receiver; at least one transmitter; and at least one controller coupled to the at least one receiver and to the at least one transmitter, wherein the at least one controller is configured to perform steps comprising; receiving a time slot comprising a pilot channel and at least one other channel, wherein the pilot channel comprises a pilot signal, and the at least one other channel comprises a reference signal having information which is known at the receiver prior to being received; and performing a position-location measurement based at least on the reference signal. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A computer program product, comprising:
computer-readable medium comprising; code to cause a computer to communicate wirelessly, comprising; code to receive a time slot comprising a pilot channel and at least one other channel, wherein the pilot channel comprises a pilot signal, and the at least one other channel comprises a reference signal having information which is known at a receiver prior to being received; and code to perform a position-location measurement based at least on the reference signal. - View Dependent Claims (37)
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38. A wireless device comprising:
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means for receiving; means for transmitting; and means for processing coupled to the means for receiving and to the means for transmitting, wherein the means for processing is configured to perform steps comprising; receiving a time slot comprising a pilot channel and at least one other channel, wherein the pilot channel comprises a pilot signal, and the at least one other channel comprises a reference signal having information which is known at a receiver prior to being received; and performing a position-location measurement based at least on the reference signal.
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Specification