Method of reducing transmission power in a wireless communication system
First Claim
1. A method of directional wireless communication between a first station and a plurality of second stations, each of said second stations capable of transmitting a signal in a plurality of beam directions and with a selected polarisation, said method comprising:
- transmitting from a first one of said second stations to said first station a first signal in a first one of said plurality of directions with a first polarisation only; and
transmitting from a second one of said second stations to said first station a second signal in a second one of said plurality of directions with a second different polarisation only,wherein said first signal and said second signal are transmitted in accordance with a selected sequence represented by the notation Bns,p, where n denotes the first or second signal, s denotes an area associated with each said second stations, and p denotes the polarisation, and said sequence is (B11,1–
B22,1), (B11,2–
B22,1), (B11,1–
B22,2), (B11,2–
B22,2).
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Accused Products
Abstract
In the described system, one or more base stations transmit a signal to a mobile station. The signal is transmitted using polarisation diversity, whereby the signal is transmitted in one direction using two signal beams, each signal beam being differently polarised. A method of beam-hoping may be employed whereby the polarisation of the transmitted beams during hand off is varied according to predefined sequence. The sequence may be determined according to the data loading within the respective transmission cells. Also disclosed is a method of soft or softer hand off within a wireless communication system where the total number of signal beams transmitted from two base stations to a single mobile station during hand off is kept constant.
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Citations
49 Claims
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1. A method of directional wireless communication between a first station and a plurality of second stations, each of said second stations capable of transmitting a signal in a plurality of beam directions and with a selected polarisation, said method comprising:
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transmitting from a first one of said second stations to said first station a first signal in a first one of said plurality of directions with a first polarisation only; and transmitting from a second one of said second stations to said first station a second signal in a second one of said plurality of directions with a second different polarisation only, wherein said first signal and said second signal are transmitted in accordance with a selected sequence represented by the notation Bns,p, where n denotes the first or second signal, s denotes an area associated with each said second stations, and p denotes the polarisation, and said sequence is (B11,1–
B22,1), (B11,2–
B22,1), (B11,1–
B22,2), (B11,2–
B22,2). - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 13, 14, 15, 17, 18, 19)
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6. A method of directional wireless communication between a first station and a plurality of second stations, each of said second stations capable of transmitting a signal in m different directions, where m is two or more, said method comprising:
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transmitting to said first station a signal from a first one of said second stations in n number of said directions, where 1≦
n<
m; andtransmitting to said first station said signal from a second one of said second stations in m-n of said directions, wherein the directions in which the signal is transmitted from said first one of said second stations are substantially different from the directions in which the signal is transmitted from the second one of said second stations. - View Dependent Claims (7, 12, 16)
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20. A method of directional wireless communication between a first station and a plurality of second stations, each of said second stations being configured to transmit a signal in a plurality of beam directions and with a selected polarisation, said method comprising:
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transmitting to said first station a first signal in a first one of said plurality of beam directions with a first polarisation only; and transmitting to said first station a second signal in a second one of said plurality of beam directions with a second different polarisation only, wherein said first signal and said second signal are transmitted from an identical one of said second stations, and said first signal and said second signal are transmitted in accordance with a selected sequence represented by the notation Bns,p, where n denotes the first or second signal, s denotes an area associated with each of said second station, and p denotes the selected polarisation, and said sequence is (B11,2–
B21,1). - View Dependent Claims (21, 22)
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23. A method of directional wireless communication between a first station and a plurality of second stations, each of said second stations being configured to transmit a signal in a plurality of beam directions and with a selected polarisation, said method comprising:
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transmitting to said first station a first signal in a first one of said plurality of directions with a first polarisation only; and transmitting to said first station a second signal in a second one of said plurality of directions with a second different polarisation only, wherein said first signal and said second signal are transmitted from an identical one of said second stations, and said first signal and said second signal are transmitted in accordance with a selected sequence represented by the notation Bns,p, where n denotes the first or second signal, s denotes an area associated with each said second station, and p denotes the polarisation, and said sequence is (B12,1–
B22,2). - View Dependent Claims (24, 25)
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26. A directional wireless communication system comprising:
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a first station; a plurality of second stations, each of said second stations being configured to transmit a signal in a plurality of beam directions and with a selected polarisation; and control means, wherein said control means controls said plurality of second stations to transmit from a first one of said second stations to said first station a first signal in a first one of said plurality of directions with a first polarisation only, and wherein said control means controls said plurality of second stations to transmit from a second one of said second stations to said first station a second signal in a second one of said plurality of directions with a second different polarisation only, and wherein said first signal and said second signal are transmitted in accordance with a selected sequence represented by the notation Bns,p, where n denotes the first or second signal, s denotes an area associated with each said second station, and p denotes the polarisation, and said sequence is (B11,1–
B22,1), (B11,2–
B22,1), (B11,1–
B22,2), (B11,2–
B22,2). - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A directional wireless communication system comprising:
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a first station; a plurality of second stations, each of said second stations being configured to transmit a signal in a plurality of beam directions and with a selected polarisation; and control means, wherein said control means controls said plurality of second stations to transmit to said first station a first signal in a first one of said plurality of beam directions with a first polarisation only, and wherein said control means controls said plurality of second stations to transmit to said first station a second signal in a second one of said plurality of beam directions with a second different polarisation only, and wherein said first signal and said second signal are transmitted from an identical one of said second stations, and said first signal and said second signal are transmitted in accordance with a selected sequence represented by the notation Bns,p, where n denotes the first or second signal, s denotes an area associated with each said second station, and p denotes a polarisation, and said sequence is (B11,2–
B21,1). - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
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42. A directional wireless communication system comprising:
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a first station; a plurality of second stations, each of said second stations being configured to transmit a signal in a plurality of beam directions and with a selected polarisation; and control means, wherein said control means controls said plurality of second stations to transmit to said first station a first signal in a first one of said plurality of directions with a first polarisation only, and wherein said control means controls said plurality of second stations to transmit to said first station a second signal in a second one of said plurality of directions with a second different polarisation only, wherein said first signal and said second signal are transmitted from an identical one of said second stations, and wherein said first signal and said second signal are transmitted in accordance with a selected sequence represented by the notation Bns,p, where n denotes the first or second signal, s denotes an area associated with each said second station, and p denotes the polarisation, and said sequence is (B12,1–
B22,2). - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
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Specification