Mitigation of wireless transmit/receive unit (WTRU) to WTRU interference using multiple antennas or beams
First Claim
1. A wireless transmit/receive unit (WTRU) for mitigating WTRU to WTRU interference in a wireless communication system, the WTRU comprising:
- means for measuring signal quality of received signals;
means for calculating antenna weights based on the quality measurements;
means for forming a directed antenna beam for receiving downlink (DL) signals based on the calculated antenna weights;
means for deriving transmission antenna weights from the calculated antenna weights; and
means for forming a directed antenna beam for transmitting uplink (UL) signals based on the derived transmission antenna weights.
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Accused Products
Abstract
Multiple antenna elements of a WTRU are used to form an adaptive antenna beam pattern for receiving signals in the downlink direction. The WTRU utilizes the formed antenna beam to form a transmission antenna beam for transmitting signals in the uplink direction. In an alternate embodiment, the multiple antenna elements are used to form a plurality of fixed, predetermined antenna beams. The WTRU then selects and switches to the one of the predetermined beams that yields the best downlink reception signals. The WTRU utilizes the selected beam pattern to transmit signals in the uplink direction. In an alternate embodiment, the WTRU receives spectral arrangement information and utilizing this information to avoid transmitting in the direction of spectrally adjacent WTRUs.
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Citations
32 Claims
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1. A wireless transmit/receive unit (WTRU) for mitigating WTRU to WTRU interference in a wireless communication system, the WTRU comprising:
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means for measuring signal quality of received signals;
means for calculating antenna weights based on the quality measurements;
means for forming a directed antenna beam for receiving downlink (DL) signals based on the calculated antenna weights;
means for deriving transmission antenna weights from the calculated antenna weights; and
means for forming a directed antenna beam for transmitting uplink (UL) signals based on the derived transmission antenna weights. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for mitigating WTRU to WTRU interference in a wireless communication system, the method comprising:
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(a) measuring signal quality of received signals;
(b) calculating antenna weights based on the quality measurements;
(c) forming a directed antenna beam for receiving downlink (DL) signals based on the calculated antenna weights;
(d) deriving transmission antenna weights from the calculated antenna weights; and
(e) forming a directed antenna beam for transmitting uplink (UL) signals based on the derived transmission antenna weights. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A WTRU for mitigating WTRU to WTRU interference in a wireless communication system, the WTRU comprising:
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means for forming a plurality of fixed, predetermined antenna beam patterns;
means for selecting one of the predetermined beam patterns;
means for switching to the selected beam pattern;
means for receiving DL signals in the selected antenna beam pattern; and
means for transmitting UL signals utilizing a same pattern as the selected antenna beam pattern. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method for mitigating WTRU to WTRU interference in a wireless communication system, the method comprising:
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(a) forming a plurality of fixed, predetermined antenna beam patterns;
(b) selecting one of the predetermined beam patterns;
(c) switching to the selected beam pattern;
(d) receiving DL signals in the selected antenna beam pattern; and
(e) transmitting UL signals utilizing a same antenna beam pattern as the selected antenna beam pattern. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A WTRU for mitigating interference in a wireless communication system, the WTRU comprising:
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an antenna array;
means for receiving spectral arrangement information;
means for locating spectrally adjacent WTRUs; and
means transmitting on the antenna array so as to avoid spectrally adjacent WTRUs.
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30. A WTRU for mitigating interference in a wireless communication system, the WTRU comprising:
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an antenna array;
means for scanning transmission frequencies in search of high energy sources;
means for determining transmission directions of high energy sources; and
means transmitting on the antenna array so as to avoid transmitting in the direction of the high energy sources.
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31. A method for mitigating interference in a wireless communication system, the method comprising:
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(a) providing a WTRU with an antenna array;
(b) receiving spectral arrangement information;
(c) locating spectrally adjacent WTRUs; and
(d) transmitting on one of the antennas so as to avoid spectrally adjacent WTRUs.
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32. A method for mitigating interference in a wireless communication system, the method comprising:
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(a) providing a WTRU with an antenna array;
(b) scanning transmission frequencies in search of high energy sources;
(c) determining transmission directions of high energy sources; and
(d) transmitting on the antenna array so as to avoid transmitting in the direction of the high energy sources.
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Specification