Power management in a cellular system
First Claim
1. A method comprising:
- determining, at a first base station, sensitivity of a utility function of a cell served by the first base station to changes in transmission powers allocated to one or more sub-bands by at least one other base station that neighbors the first base station;
estimating a spectral efficiency for each of the one or more sub-bands by the first base station, wherein the estimating further comprises;
approximating the spectral efficiency by a power function of a Channel Quality Indicator reported by a mobile device performing measurements on a particular sub-band; and
approximating the Channel Quality Indicator by a linear function of a Signal to Interference and Noise Ratio measured by the mobile device, wherein the Signal to Interference and Noise Ratio is measured in decibels; and
transmitting information from the first base station to the at least one other base station, wherein the information comprises sensitivity information for the utility function for each of the one or more sub-bands and wherein the information is associated with a Relative Narrowband Transmit Power (RNTP) of the cell in each of one or more sub-bands.
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Abstract
A method of controlling the respective transmit powers allocated by a base station of a cellular communications network to each of a plurality of sub-bands is provided. Information from at least one other base station of the network is received, the information comprising information about a sensitivity of a utility function in a cell served by the other base station to changes in powers allocated to respective sub-bands by the base station. A sub-band is identified in which it would be relatively advantageous to increase a transmit power. It is determined whether a factor relating to a happiness of users in the cell exceeds a threshold value. The transmit power in the identified sub-band is increased only if the happiness factor is less than the threshold value.
312 Citations
12 Claims
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1. A method comprising:
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determining, at a first base station, sensitivity of a utility function of a cell served by the first base station to changes in transmission powers allocated to one or more sub-bands by at least one other base station that neighbors the first base station; estimating a spectral efficiency for each of the one or more sub-bands by the first base station, wherein the estimating further comprises; approximating the spectral efficiency by a power function of a Channel Quality Indicator reported by a mobile device performing measurements on a particular sub-band; and approximating the Channel Quality Indicator by a linear function of a Signal to Interference and Noise Ratio measured by the mobile device, wherein the Signal to Interference and Noise Ratio is measured in decibels; and transmitting information from the first base station to the at least one other base station, wherein the information comprises sensitivity information for the utility function for each of the one or more sub-bands and wherein the information is associated with a Relative Narrowband Transmit Power (RNTP) of the cell in each of one or more sub-bands. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A first base station comprising:
a processor to execute instructions, wherein executing the instructions causes the first base station to perform operations comprising; determining, at the first base station, sensitivity of a utility function of a cell served by the first base station to changes in transmission powers allocated to one or more sub-bands by at least one other base station that neighbors the first base station; estimating a spectral efficiency for each of the one or more sub-bands by the first base station, wherein the estimating further comprises; approximating the spectral efficiency by a power function of a Channel Quality Indicator reported by a mobile device performing measurements on a particular sub-band; and approximating the Channel Quality Indicator by a linear function of a Signal to Interference and Noise Ratio measured by the mobile device, wherein the Signal to Interference and Noise Ratio is measured in decibels; and transmitting information from the first base station to the at least one other base station, wherein the information comprises sensitivity information for the utility function for each of the one or more sub-bands and wherein the information is associated with a Relative Narrowband Transmit Power (RNTP) of the cell in each of one or more sub-bands. - View Dependent Claims (8, 9, 10, 11, 12)
Specification