Interference measurements in a wireless communications system
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Abstract
Interference Measurements in a Wireless Communications System A method and a transmitting unit for performing an interference measurement in a multiple access wireless communications system utilizing a carrier sensing technique is described. In accordance with the carrier sensing technique, it is monitored during a sensing period (Tmin) if a carrier is idle. A continuous or quasi-continuous interference measurement is performed on the carrier during a measurement period (TM) which is typically longer than the sensing period (Tmin). While performing the interference measurement, pulses are transmitted on the carrier such that an interval between the end of a pulse and the beginning of the next pulse is typically shorter than the sensing period (Tmin). The interference measurements preferably relate to detection of interference from radar signals or radar like signals.
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Citations
42 Claims
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1-20. -20. (canceled)
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21. A method of performing an interference measurement in a multiple access wireless communications system utilizing a carrier sensing technique for monitoring during a sensing period if a carrier is idle, comprising:
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performing a continuous or quasi-continuous interference measurement on the carrier during a measurement period which is typically longer than the sensing period; and
while performing the interference measurement, transmitting pulses on the carrier such that an interval between the end of a pulse and the beginning of the next pulse typically does not exceed the sensing period. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of detecting interference from radar or radar-like signals in a multiple access wireless communications system, comprising:
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monitoring by means of a carrier sensing technique during a sensing period if a carrier is idle;
performing a continuous or quasi-continuous interference measurement on the carrier to detect radar of radar-like signals, wherein the interference measurement is performed during a measurement period and wherein this measurement period is longer than the sensing period;
transmitting pulses on the carrier while performing the interference measurement, wherein the pulses are transmitted such that an interval between the end of a pulse and the beginning of the next pulse does not exceed the sensing period; and
varying during transmission of the pulses at least one of a transmit power of the pulses and an interval between the end of a pulse and the beginning of the next pulse. - View Dependent Claims (38)
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37. A computer program product for controlling in a multiple access wireless communications system interference measurements relating to detection of radar or radar-like signals, comprising:
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program code means for monitoring during a sensing period if a carrier is idle utilizing a carrier sensing technique;
program code means for performing a continuous or quasi-continuous interference measurement on the carrier, wherein the interference measurement is performed during a measurement period and wherein the measurement period is longer than the sensing period; and
program code means for transmitting, while performing the interference measurement, pulses on the carrier, wherein the pulses are transmitted such that an interval between the end of a pulse and the beginning of the next pulse does not exceed the sensing period.
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- 39. A transmitting unit of a multiple access wireless communications system utilizing a carrier sensing technique for monitoring during a sensing period if a carrier is idle, comprising a subunit for transmitting pulses on the carrier during a measurement period which is typically longer than the sensing period such that an interval between the end of a pulse and the beginning of the next pulse is typically shorter than the sensing period.
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40. A transmitting device of a multiple access wireless communications system utilizing a carrier sensing technique for monitoring during a sensing period if a carrier is idle, the transmitting device comprising a first subunit for transmitting on the carrier during a measurement period which is longer than the sensing period pulses such that an interval between the end of a pulse and the beginning of the next pulse is shorter than the sensing period, and a second subunit for varying during the transmission of the pulses at least one of a transmit power of the pulses and an interval between the end of a pulse and he beginning of the next pulse.
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41. A wireless communications system comprising:
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a transmitting unit for transmitting on a carrier that is monitored during a sensing period to determine if the carrier is idle, wherein the transmission includes pulses that are transmitted during a measurement period which is longer than the sensing period and that are transmitted such that an interval between the end of a pulse and the beginning of the next pulse is shorter than the sensing period; and
a measurement unit for performing a continuous or quasi-continuous interference measurement during the measurement period.
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Specification