Systems and methods for self-optimization in wireless base stations by detection of interference at the edge of a received radio frequency band
First Claim
Patent Images
1. A wireless communication system comprising:
- a mobile device;
a first base station using a first frequency resource, the first base station communicating with the mobile device using a carrier frequency derived from a reference frequency; and
a second base station using a second frequency resource;
wherein the first base station is configured to;
monitor an interference level of an intersection between the first frequency resource and the second frequency resource by monitoring an interference level of a resource block of the first frequency resource at an edge of the first frequency resource adjacent to the second frequency resource;
determine whether or not the interference level of the resource block indicates a frequency error; and
adjust the reference frequency of the first base station to correct the frequency error when the monitored interference level of the resource block indicates a frequency error.
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Abstract
Systems and methods are described for reducing an interference level associated with frequency drift in a wireless base station. The base station monitors an interference level in a frequency resource caused by a first frequency resource colliding with a second frequency resource. If the interference level is outside of an expected range, the base station adjusts a parameter of the base station such as a reference oscillator frequency to compensate for frequency drift. This method may be used in a femtocell wireless base station.
11 Citations
19 Claims
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1. A wireless communication system comprising:
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a mobile device; a first base station using a first frequency resource, the first base station communicating with the mobile device using a carrier frequency derived from a reference frequency; and a second base station using a second frequency resource; wherein the first base station is configured to; monitor an interference level of an intersection between the first frequency resource and the second frequency resource by monitoring an interference level of a resource block of the first frequency resource at an edge of the first frequency resource adjacent to the second frequency resource; determine whether or not the interference level of the resource block indicates a frequency error; and adjust the reference frequency of the first base station to correct the frequency error when the monitored interference level of the resource block indicates a frequency error. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer implemented method for reducing wireless interference in a base station, comprising:
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receiving a first frequency resource used by a first base station, the first base station using a carrier frequency derived from a reference frequency to communicate with a mobile device; monitoring an interference level of a resource block at an edge of the first frequency resource adjacent to a second frequency resource used by a second base station; determining whether or not the interference level of the resource block indicates a frequency error; and adjusting the reference frequency of the first base station to correct the frequency error if the interference level of the resource block indicates a frequency error. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A non-transitory computer readable medium encoded with computer-executable instructions for reducing wireless interference in a base station, which when executed, performs a method comprising:
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receiving a first frequency resource used by a first base station, the first base using a carrier frequency derived from a reference frequency to communicate with a mobile device; monitoring an interference level of a resource block at an edge of the first frequency resource adjacent to a second frequency resource used by a second base station; determining whether or not the interference level of the resource block indicates a frequency error; and adjusting the reference of the first base station to correct to correct the frequency error if the interference level of the resource block indicates a frequency error. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification