Controlling interference in femto cell deployments
First Claim
1. One or more computer-readable storage memories embodying processor-executable instructions which, responsive to execution by at least one processor, are configured to enable a femto cell to:
- identify, using the femto cell, a plurality of preselected wireless signal carriers based on a predefined geographical area;
measure, using the femto cell, an initial power level for each wireless signal carrier of the plurality of preselected wireless signal carriers provided in the predefined geographical area;
select, using the femto cell, one of the wireless signal carriers of the plurality of preselected wireless signal carriers based on predefined criteria associated with the measured initial power level effective to enable the femto cell to communicate with a target mobile device;
evaluate, using the femto cell, a data rate control (DRC) average associated with the target mobile device;
determine, using the femto cell, whether the evaluated DRC average is above a predetermined threshold;
responsive to determining the evaluated DRC average is above the predetermined threshold, repeatedly;
reduce, using the femto cell, a transmitted power associated with the target mobile device;
evaluate, using the femto cell, a new DRC average associated with the target mobile device; and
determine, using the femto cell, whether the evaluated new DRC average associated with the target mobile device is below the predetermined threshold;
until the evaluated new DRC average associated with the target mobile device is below the predetermined threshold; and
responsive to determining the DRC average or the new DRC average is below the predetermined threshold, maintain the DRC average or the new DRC average associated with the target mobile device.
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Accused Products
Abstract
A method and system provide a plurality of femto cells that are deployed within a macro cell of cellular network. The femto cells improve cellular service inside structures, such as residential and commercial structures. Femto base stations convert signals between an airlink-interface and core network to enable data communication between the mobile terminal and an access network to occur through the Internet and a public switched telephone network. The femto base stations are independent of each other and the macro cell. The method and system provide the femto base stations with interference awareness and mitigation techniques to minimize interference with the cellular network.
16 Citations
20 Claims
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1. One or more computer-readable storage memories embodying processor-executable instructions which, responsive to execution by at least one processor, are configured to enable a femto cell to:
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identify, using the femto cell, a plurality of preselected wireless signal carriers based on a predefined geographical area; measure, using the femto cell, an initial power level for each wireless signal carrier of the plurality of preselected wireless signal carriers provided in the predefined geographical area; select, using the femto cell, one of the wireless signal carriers of the plurality of preselected wireless signal carriers based on predefined criteria associated with the measured initial power level effective to enable the femto cell to communicate with a target mobile device; evaluate, using the femto cell, a data rate control (DRC) average associated with the target mobile device; determine, using the femto cell, whether the evaluated DRC average is above a predetermined threshold; responsive to determining the evaluated DRC average is above the predetermined threshold, repeatedly; reduce, using the femto cell, a transmitted power associated with the target mobile device; evaluate, using the femto cell, a new DRC average associated with the target mobile device; and determine, using the femto cell, whether the evaluated new DRC average associated with the target mobile device is below the predetermined threshold; until the evaluated new DRC average associated with the target mobile device is below the predetermined threshold; and responsive to determining the DRC average or the new DRC average is below the predetermined threshold, maintain the DRC average or the new DRC average associated with the target mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer-implemented method comprising:
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identifying, using a femto cell in a wireless communication network, a plurality of preselected wireless signal carriers based on a predefined geographical area; measuring, using the femto cell, an initial power level for each wireless signal carrier of the plurality of preselected wireless signal carriers provided in the predefined geographical area; selecting, using the femto cell, one of the wireless signal carriers of the plurality of preselected wireless signal carriers based on predefined criteria associated with the measured initial power level effective to enable the femto cell to communicate with a target mobile device; evaluating, using the femto cell, a data rate control (DRC) average associated with the target mobile device; determining, using the femto cell, whether the evaluated DRC average is above a predetermined threshold; responsive to determining the evaluated DRC average is above the predetermined threshold, repeatedly; reducing, using the femto cell, a transmitted power associated with the target mobile device; evaluating, using the femto cell, a new DRC average associated with the target mobile device; and determining, using the femto cell, whether the evaluated new DRC average associated with the target mobile device is below the predetermined threshold; until the evaluated new DRC average associated with the target mobile device is below the predetermined threshold; and responsive to determining the DRC average or the new DRC average is below the predetermined threshold, maintaining the DRC average or the new DRC average associated with the target mobile device. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A femto cell configured to operate in a wireless communication network, the femto cell comprising:
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at least one processor; and one or more computer-readable storage memories embodying processor-executable instructions which, responsive to execution by at least one processor, are configured to enable the femto cell to; identify, using the femto cell, a plurality of preselected wireless signal carriers based on a predefined geographical area; measure, using the femto cell, an initial power level of each wireless signal carrier of the plurality of preselected wireless signal carriers provided in the predefined geographical area; select, using the femto cell, one of the wireless signal carriers based on predefined criteria associated with the measured initial power level effective to enable the femto cell to communicate with a target mobile device; evaluate, using the femto cell, a data rate control (DRC) average associated with the target mobile device; determine, using the femto cell, whether the evaluated DRC average is above a predetermined threshold; responsive to determining the evaluated DRC average is above the predetermined threshold, repeatedly; reduce, using the femto cell, a transmitted power associated with the target mobile device; evaluate, using the femto cell, a new DRC average associated with the target mobile device; and determine, using the femto cell, whether the evaluated new DRC average associated with the target mobile device is below the predetermined threshold; until the evaluated new DRC average associated with the target mobile device is below the predetermined threshold; and responsive to determining the DRC average or the new DRC average is below the predetermined threshold, maintain the DRC average or the new DRC average associated with the target mobile device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification