Methods and devices for reducing interference in an uplink
First Claim
Patent Images
1. A method of operating a communication system, the communication system comprising at least a macrocell base station and a femto cell base station that is within the coverage area of the macrocell base station, the method comprising:
- providing an indication of a noise rise or interference measured at the macrocell base station to the femtocell base station by providing the indication of the noise rise or interference from an X2 proxy or femto gateway having a communication interface with the femtocell base station and the macrocell base station; and
the femtocell base station adjusting a maximum permitted transmission power for mobile devices transmitting to the femtocell base station based on the indication.
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Abstract
A method of operating a communication system such that the communication system comprises at least a macrocell base station and a femtocell base station that is within the coverage area of the macrocell base station. The communication system is configured to provide an indication of the noise rise or interference at the macrocell base station to the femtocell base station and the femtocell base station, in response thereto, adjusts a maximum permitted transmission power based on the indication.
187 Citations
22 Claims
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1. A method of operating a communication system, the communication system comprising at least a macrocell base station and a femto cell base station that is within the coverage area of the macrocell base station, the method comprising:
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providing an indication of a noise rise or interference measured at the macrocell base station to the femtocell base station by providing the indication of the noise rise or interference from an X2 proxy or femto gateway having a communication interface with the femtocell base station and the macrocell base station; and the femtocell base station adjusting a maximum permitted transmission power for mobile devices transmitting to the femtocell base station based on the indication. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating a communication system, the communication system comprising at least a macrocell base station and a femtocell base station that is within the coverage area of the macrocell base station, the method comprising:
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providing an indication of a noise rise or interference at the macrocell base station to the femtocell base station; and adjusting a maximum permitted transmission power at the femtocell base station for mobile devices transmitting to the femtocell base station based on the indication, for at least one other macrocell base station neighboring the macrocell base station, after providing an indication that the noise rise or interference at the macrocell base station is relatively high, the adjusting step comprising; determining whether the noise rise or interference at the macrocell base station has improved; in the event that the noise rise or interference at the macrocell base station has not improved, providing an indication of the noise rise or interference at the macrocell base station to said at least one other macrocell base station; and adjusting a maximum permitted transmission power at the at least one other macrocell base station for mobile devices transmitting thereto based on the indication. - View Dependent Claims (9, 10, 11, 12)
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13. A femtocell base station having a communication interface, the femtocell base station being located in a coverage area of a macrocell base station, the femtocell base station comprising
a communication interface configured to: -
receive an indication of a noise rise or interference from a macrocell base station, the indication setting a maximum permitted uplink transmission power for mobile devices transmitting in an uplink to the femtocell base station based on the received indication; reduce, in the femtocell base station, the maximum permitted uplink transmission power for mobile devices transmitting in an uplink to the femtocell base station; receive a second indication at the femtocell base station from the macrocell base station, the second indication indicating whether the noise rise or interference at the macrocell base station has improved after the reducing, in the femtocell base station, the maximum permitted uplink transmission power; and in the event that the noise rise or interference at the macrocell base station has not improved, increase, in the femtocell base station, the maximum permitted uplink transmission power for mobile devices transmitting in an uplink to the femtocell base station based on the second indication. - View Dependent Claims (14, 15, 16, 17)
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18. A communication system comprising at least a macrocell base station and a femtocell base station that is within the coverage area of the macrocell base station, the communication system configured to:
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provide an indication of a noise rise or interference at the macrocell base station to the femtocell base station; and adjust a maximum permitted transmission power at the femtocell base station for mobile devices transmitting to the femtocell base station based on the indication; after providing an indication that the noise rise or interference at the macrocell base station is relatively high, at least one other macrocell base station neighbouring the macrocell base station configured to; determine whether the noise rise or interference at the macrocell base station has improved; in the event that the noise rise or interference at the macrocell base station has not improved, provide an indication of the noise rise or interference at the macrocell base station to said at least one other macrocell base station; and adjust a maximum permitted transmission power to the at least one other macrocell base station for mobile devices transmitting thereto based on the indication. - View Dependent Claims (19, 20, 21, 22)
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Specification