Systems and methods for dynamic temperature calibration of a frequency reference
First Claim
1. A system, comprising:
- a first base station having a first frequency reference unit, a temperature sensor, and a memory having a calibration table stored therein;
a second base station having a second frequency reference unit; and
a network controller device configured to manage radio resources of the first and second base stations, the network controller device configured to receive frequency information from a subscriber device, the frequency information being based on a first measurement of a first transmit frequency of the first base station and a second measurement of a second transmit frequency of the second base station,wherein the first base station is configured to;
receive reference correction feedback from the network controller device, the reference correction feedback being based on the frequency information received from the subscriber device;
measure a first operating temperature with the temperature sensor;
update the calibration table using data associated with the reference correction feedback and calibration table data associated with the first operating temperature; and
correct the first frequency reference unit of the first base station using the updated calibration table.
3 Assignments
0 Petitions
Accused Products
Abstract
A system and method are described for dynamic temperature calibration of a frequency reference in a wireless base station. In a consumer grade base station, a reference oscillator may encounter frequency drift as the temperature of the base station changes. This causes interference as the transmission signal is not synchronized with other frequency resources in a network. An improved method of calibrating a reference frequency includes measuring a frequency difference between a frequency derived from an accurate reference frequency in a first base station and a frequency derived from a less accurate frequency reference in a second base station, determining a calibration factor for the offset, and applying the calibration factor to the base station to correct frequency drift. The calibration factors may be correlated with an operating temperature of the base station and stored in a temperature calibration table in the base station device.
-
Citations
21 Claims
-
1. A system, comprising:
-
a first base station having a first frequency reference unit, a temperature sensor, and a memory having a calibration table stored therein; a second base station having a second frequency reference unit; and a network controller device configured to manage radio resources of the first and second base stations, the network controller device configured to receive frequency information from a subscriber device, the frequency information being based on a first measurement of a first transmit frequency of the first base station and a second measurement of a second transmit frequency of the second base station, wherein the first base station is configured to; receive reference correction feedback from the network controller device, the reference correction feedback being based on the frequency information received from the subscriber device; measure a first operating temperature with the temperature sensor; update the calibration table using data associated with the reference correction feedback and calibration table data associated with the first operating temperature; and correct the first frequency reference unit of the first base station using the updated calibration table. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A non-transitory computer-readable medium encoded with computer-executable instructions for updating a calibration table in a base station, which when executed, performs operations, the operations comprising:
-
receiving, at a network controller device, frequency information from a subscriber device, the frequency information being based on a first measurement of a first transmit frequency of a first base station and a second measurement of a second transmit frequency of a second base station, the network controller device being configured to manage radio resources of the first and second base stations; providing, by the network controller device, reference correction feedback to the first base station by the network controller device, the reference correction feedback being based on the frequency information received from the subscriber device; measuring a first operating temperature of a first frequency reference unit of the first base station with a temperature sensor provided within the first base station; updating a calibration table of the first base station using data associated with the reference correction feedback and calibration table data associated with the first operating temperature; and correcting the first frequency reference unit of the first base station using the updated calibration table of the first base station. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
16. A computer-implemented method for updating a calibration table in a base station, the method comprising:
-
receiving, at a network controller device, frequency information from a subscriber device, the frequency information being based on a first measurement of a first transmit frequency of a first base station and a second measurement of a second transmit frequency of a second base station; providing, by the network controller device, reference correction feedback to the first base station, the reference correction feedback being based on the frequency information received from the subscriber device; measuring a first operating temperature of a first frequency reference unit of the first base station with a temperature sensor provided within the first base station; updating a calibration table of the first base station using data related to the reference correction feedback and calibration table data associated with the first operating temperature, the calibration table of the first base station being stored within a non-transitory computer readable medium within the first base station; and correcting the first frequency reference unit of the first base station using the updated calibration table of the first base station. - View Dependent Claims (17, 18, 19, 20, 21)
-
Specification