Power management in a cellular system
AssigneeCisco Technology, Inc.
InventorsAlan James Auchmuty Carter, Raymond Kwan
Life of this patent
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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.
Claims14
A method of controlling respective transmit powers allocated by a base station of a cellular communications network to each of a plurality of sub-bands, the method comprising:
- receiving information from at least one other base station of said network, said information comprising information about a sensitivity of a utility function in a cell served by said other base station to changes in downlink transmission powers allocated to respective sub-bands by said base station,
- identifying a sub-band in which it would be relatively advantageous to increase a downlink transmit power;
- determining whether a factor relating to a service expectation of users in the cell exceeds a threshold value, wherein the factor is defined by each of a respective user's average bit rate divided by the respective user's required bit rate;
- and
- increasing the downlink transmit power in the identified sub-band only if the factor is less than the threshold value.
A method of determining an effect of interference in a cell served by a base station of a cellular communications network, said interference being caused by transmissions from a base station in at least one neighbouring cell of said network, the method comprising:
- obtaining measurements from mobile devices connected to the base station;
- and
- using the measurements to derive a measure of sensitivity of a utility function in said cell served by said base station to changes in downlink transmission powers allocated to respective sub-bands by said base station in said at least one neighbouring cell of said network.
Dependencies are inferred from the claim text.