Method of controlling power on forward link in a cellular
First Claim
1. A method of controlling transmission power of at least one base station among a plurality of base stations associated with a mobile unit in a CDMA (code division multiple access) cellular system, said mobile unit communicating with said at least one base station, said method comprising the steps of:
- (a) measuring, at said mobile unit, a power value of each of a plurality of pilot signals respectively transmitted from said plurality of base stations;
(b) determining a first power control coefficient which is a ratio of total pilot power values of said plurality of base stations, other than said at least one base station, to a pilot power value of said at least one base station; and
(c) controlling the transmission power of at least one base station by using said first power control coefficient.
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Abstract
A method of controlling transmission power of a plurality of base stations associated with a mobile unit in a CDMA (code division multiple access) cellular system, is disclosed. The mobile unit communicates with one base station among the plurality of base stations. According to the present invention, power of each of pilot signals respectively transmitted from the plurality of base stations is measured at the mobile unit. Following this, information about a measured power value of each of the pilot signals is transmitted to the one base station. Thereafter, a first power control coefficient is determined at the one base station. The coefficient is a ratio of total pilot power values of the plurality of base stations, other than the main base station, to a pilot power value of the one base station. Subsequently, the transmission power of each of the plurality of base stations using the first power control coefficient is controlled.
130 Citations
14 Claims
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1. A method of controlling transmission power of at least one base station among a plurality of base stations associated with a mobile unit in a CDMA (code division multiple access) cellular system, said mobile unit communicating with said at least one base station, said method comprising the steps of:
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(a) measuring, at said mobile unit, a power value of each of a plurality of pilot signals respectively transmitted from said plurality of base stations; (b) determining a first power control coefficient which is a ratio of total pilot power values of said plurality of base stations, other than said at least one base station, to a pilot power value of said at least one base station; and (c) controlling the transmission power of at least one base station by using said first power control coefficient. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of controlling transmission power of at least one base station of a plurality of base stations associated with a mobile unit in a CDMA cellular system, said mobile unit communicating with said at least one base station, said method comprising the steps of:
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(a) measuring, at said mobile unit, a first power value of a pilot signal transmitted from said at least one base station and a plurality of second power values each transmitted from said plurality of base stations other than said at least one base station; (b) advising said at least one base station of said first and second power values; (c) determining, at said at least one base station, a power control coefficient using said first and second power values; and (d) controlling the transmission power of said at least one base station using said power control coefficient. - View Dependent Claims (8, 9, 10, 11)
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12. A method of controlling transmission power of at least one base station among a plurality of base stations associated with a mobile unit in a CDMA cellular system, said mobile unit communicating with said at least one base station, said method comprising the steps of:
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(a) measuring, at said mobile unit, a first power value of a pilot signal transmitted from said at least one base station and a plurality of second power values each transmitted from said plurality of base stations other than said at least one base station; (b) determining, at said mobile unit, a power control coefficient using said first and second power values; (c) advising said at least one base station of said power control coefficient; and (d) controlling the transmission power of said at least one base station using said power control coefficient. - View Dependent Claims (13, 14)
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Specification