Uplink and downlink transmission quality improvement by differentiated base station antenna pattern downtilt
First Claim
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1. An apparatus for increasing a gain in a downlink carrier-to-interference ratio in a cellular telecommunications network, with at least one base station antenna for transmitting a downlink signal and receiving an uplink signal, comprising:
- a first measuring means for measuring a downlink parameter associated with at least one of a downlink interference and a downlink coverage in a target cell, wherein said transmitted downlink signal is received by a mobile unit;
a first determining means for determining a first tilt angle for a transmit pattern based upon said at least one downlink parameter;
a second measuring means for measuring an uplink parameter associated with at least one of an uplink signal strength and an uplink interference, wherein said received uplink signal is transmitted by said mobile unit and received by said base station; and
a second determining means for determining a second tilt angle for a receive pattern based upon said at least one uplink parameter.
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Abstract
In a cellular telecommunications network, a method and apparatus is disclosed for providing a substantial gain in downlink C/I by means of antenna pattern downtilt while still maintaining the coverage limiting signal strength in the uplink by the use of different antenna pattern downtilt for the transmit and receive antenna patterns.
65 Citations
40 Claims
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1. An apparatus for increasing a gain in a downlink carrier-to-interference ratio in a cellular telecommunications network, with at least one base station antenna for transmitting a downlink signal and receiving an uplink signal, comprising:
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a first measuring means for measuring a downlink parameter associated with at least one of a downlink interference and a downlink coverage in a target cell, wherein said transmitted downlink signal is received by a mobile unit;
a first determining means for determining a first tilt angle for a transmit pattern based upon said at least one downlink parameter;
a second measuring means for measuring an uplink parameter associated with at least one of an uplink signal strength and an uplink interference, wherein said received uplink signal is transmitted by said mobile unit and received by said base station; and
a second determining means for determining a second tilt angle for a receive pattern based upon said at least one uplink parameter. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10)
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6. In a cellular telecommunications network with at least one base station antenna for transmitting a downlink signal and receiving an uplink signal, a method for increasing a gain in a downlink carrier-to-interference ratio comprising the steps of:
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measuring a downlink parameter associated with at least one of a downlink interference and a downlink coverage in a target cell, wherein said transmitted downlink signal is received by at least one mobile unit;
determining a first tilt angle for a transmit pattern based upon said at least one downlink parameter;
measuring an uplink parameter associated with at least one of an uplink signal strength and an uplink interference, wherein said received uplink signal is transmitted by said at least one mobile unit; and
determining a second tilt angle for a receive pattern based upon said at least one uplink parameter.
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11. In a cellular telecommunications network with at least one base station antenna transmitting a downlink and receiving an uplink, a method for increasing a gain in a downlink carrier-to-interference ratio comprising the steps of:
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measuring a downlink parameter associated with at least one of a downlink interference and a downlink coverage in a target cell, wherein said transmitted downlink is a signal received by at least one mobile unit;
applying a first downtilt angle to an antenna pattern associated with said downlink based on the measured downlink parameter; and
applying a second downtilt angle to an antenna pattern associated with said uplink, wherein said received uplink is a signal transmitted by said at least one mobile unit, said first downtilt angle being different than said second downtilt angle. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An apparatus for increasing a gain in a downlink carrier-to-interference ratio in a cellular telecommunications network, with at least one base station antenna transmitting a downlink and receiving an uplink, comprising:
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a means for applying a first downtilt angle to an antenna pattern associated with said downlink, wherein said transmitted downlink is received by at least one mobile unit; and
a means for applying a second downtilt angle to an antenna pattern associated with said uplink, wherein said received uplink is transmitted by said at least one mobile unit, said first downtilt angle being different than said second downtilt angle. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification