Method and apparatus for handover of device to mitigate uplink interference in femtocell deployments
First Claim
1. A method for mitigating interference in a wireless network, comprising:
- receiving, at a femto access point from a device served by the femto access point, a plurality of transmission power reports from the device that indicate the transmit power utilized by the device;
receiving, at the femto access point from the device served by the femto access point, one or more parameters related to a decrease in a transmit power headroom at the device with respect to a transmission power cap, the transmission power cap is communicated from the femto access point to the device and used in uplink communications by the device, wherein the receiving the one or more parameters comprises determining a number of the plurality of transmission power reports received from the device over a period of time;
comparing, at the femto access point, the one or more parameters to a threshold value to determine whether the device is potentially causing interference to communications of one or more macro access points; and
performing a handover of the device from the femto access point to a different macro access point based at least in part on the comparing.
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Accused Products
Abstract
Methods and apparatuses are provided for determining whether to handover a device to mitigate uplink interference while achieving acceptable uplink service quality in a wireless network. One or more parameters related to a device can be evaluated to determine whether to handover the device, such as a number of transmission power reports received from the device over a period of time, a frame error rate, setpoint, or power control commands related to the uplink of the device, a received pilot signal strength at the device, an uplink throughput or buffer size at the device, etc., from which transmit power information of the device can be inferred for determining whether the device potentially interferes with access points or devices. Based on the one or more parameters, an access point can determine whether handing over the device may mitigate such uplink interference while ensuring uplink service quality, and accordingly handover the device.
10 Citations
37 Claims
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1. A method for mitigating interference in a wireless network, comprising:
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receiving, at a femto access point from a device served by the femto access point, a plurality of transmission power reports from the device that indicate the transmit power utilized by the device; receiving, at the femto access point from the device served by the femto access point, one or more parameters related to a decrease in a transmit power headroom at the device with respect to a transmission power cap, the transmission power cap is communicated from the femto access point to the device and used in uplink communications by the device, wherein the receiving the one or more parameters comprises determining a number of the plurality of transmission power reports received from the device over a period of time; comparing, at the femto access point, the one or more parameters to a threshold value to determine whether the device is potentially causing interference to communications of one or more macro access points; and performing a handover of the device from the femto access point to a different macro access point based at least in part on the comparing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A femto access point for mitigating interference in a wireless network, comprising:
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at least one processor configured to; receive, at the femto access point from a device served by the femto access point, a plurality of transmission power reports from the device that indicate the transmit power utilized by the device; receive, at the femto access point from the device served by the femto access point, one or more parameters related to a decrease in a transmit power headroom at the device with respect to a transmission power cap, the transmission power cap is communicated from the femto access point to the device and used in uplink communications by the device, wherein the one or more parameters correspond to a determined number of the plurality of transmission power reports received from the device over a period of time; compare, at the femto access point, the one or more parameters to a threshold value to determine whether the device is potentially causing interference to communications of one or more macro access points; and perform a handover of the device from the femto access point to a different macro access point based at least in part on the comparing; and a memory coupled to the at least one processor. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A femto access point for mitigating interference in a wireless network, comprising:
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means for receiving, at the femto access point from a device served by the femto access point, a plurality of transmission power reports from the device that indicate the transmit power utilized by the device, and one or more parameters related to a decrease in a transmit power headroom with respect to a transmission power cap, the transmission power cap is communicated from the femto access point to the device and used in uplink communications by the device, wherein the means for receiving the one or more parameters determines the one or more parameters as a number of the plurality of transmission power reports received from the device over a period of time; means for comparing, at the femto access point, the one or more parameters to a threshold value to determine whether the device is potentially causing interference to communications of one or more macro access points; and means for performing a handover of the device from the femto access point to a different macro access point based at least in part on the comparing. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A non-transitory computer-readable medium for mitigating interference in a wireless network, comprising:
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code for causing at least one computer to receive, at a femto access point from a device served by the femto access point, a plurality of transmission power reports from the device that indicate the transmit power utilized by the device; code for causing the at least one computer to receive, at the femto access point from the device served by the femto access point, one or more parameters related to a decrease in a transmit power headroom at the device with respect to a transmission power cap, the transmission power cap is communicated from the femto access point to the device and used in uplink communications by the device, wherein the one or more parameters correspond to a determined number of the plurality of transmission power reports received from the device over a period of time; code for causing the at least one computer to compare, at the femto access point, the one or more parameters to a threshold value to determine whether the device is potentially causing interference to communications of one or more macro access points; and code for causing the at least one computer to perform a handover of the device from the femto access point to a different macro access point based at least in part on the comparing. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A femto access point for mitigating interference in a wireless network, comprising:
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a memory; at least one processor coupled to the memory and configured to; receive at the femto access point from a device served by the femto access point, one or more parameters related to a decrease in a transmit power headroom at the device with respect to a transmission power cap, the transmission power cap is communicated from the femto access point to the device and used in uplink communications by the device, wherein the device is subject to interference from at least one other device served by at least one other access point; receive, at the femto access point from the device served by the femto access point, a plurality of transmission power reports from the device that indicate the transmit power utilized by the device; and determine the one or more parameters as a number of the plurality of transmission power reports received from the device over a period of time; compare, at the femto access point, the one or more parameters to a threshold value to determine whether the device is potentially causing interference to communications of one or more macro access points; and perform a handover of the device from the femto access point to a different macro access point based at least in part on the comparing. - View Dependent Claims (32, 33, 34, 35, 36, 37)
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Specification