Abstract
Method and apparatus for synchronizing base stations employing an independent synchronizing source or identifying a base station as a master source. An RNC (C-RNC) or a base station may designate one base station or a UE to acquire measurements derived from base stations to achieve synchronization. Synchronization activities may be regularly scheduled or may be undertaken when periodic measurements indicate that a drift value exceeds a given threshold.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Specification Information
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Technologies
Multiple access
Product
Use Cases
Services
Claim
1. A method for time synchronizing a plurality of base stations in a wireless communication system, comprising:
detecting at least one of a plurality of out-of-sync base stations;
measuring a plurality of cell timing signals, wherein the measuring includes sending a request for a base station time of arrival (BSTOA) value to at least one of the out-of-sync base stations, and transmitting the BSTOA value;
correcting the at least one of a plurality of out-of-sync base stations, wherein
the correcting includes:
comparing the BSTOA value with a stored BSTOA value;
generating a correction message;
transmitting the correction message to the out-of-sync base station;
receiving a report from the out-of-sync base station; and
updating a covariant matrix database;
maintaining the covariant matrix database on a radio network controller (RNC);
wherein at least one out-of-sync base station or at least one user equipment (UE) is under control of at least two different RNCs, and:
establishing a communications path between the at least two different RNCs; and
performing base station synchronizing.', 'detecting at least one of a plurality of out-of-sync base stations;', 'measuring a plurality of cell timing signals, wherein the measuring includes sending a request for a base station time of arrival (BSTOA) value to at least one of the out-of-sync base stations, and transmitting the BSTOA value;', 'correcting the at least one of a plurality of out-of-sync base stations, wherein', 'the correcting includes:
comparing the BSTOA value with a stored BSTOA value;
generating a correction message;
transmitting the correction message to the out-of-sync base station;
receiving a report from the out-of-sync base station; and
updating a covariant matrix database;', 'comparing the BSTOA value with a stored BSTOA value;', 'generating a correction message;', 'transmitting the correction message to the out-of-sync base station;', 'receiving a report from the out-of-sync base station; and', 'updating a covariant matrix database;', 'maintaining the covariant matrix database on a radio network controller (RNC);', 'wherein at least one out-of-sync base station or at least one user equipment (UE) is under control of at least two different RNCs, and:', 'establishing a communications path between the at least two different RNCs; and', 'performing base station synchronizing.
2. The method of claim 1 wherein detecting at least one of a plurality of out-of-sync base stations comprises:
updating a covariant matrix database; and
determining at least one out-of-sync base station from the plurality of cell timing signals.', 'updating a covariant matrix database; and', 'determining at least one out-of-sync base station from the plurality of cell timing signals.
3. The method of claim 1 wherein measuring a plurality of cell timing signals further comprises:
sending a request for the BSTOA value to at least one of a plurality of user equipments (UEs) to measure the out-of-sync base stations; and
transmitting the BSTOA value.', 'sending a request for the BSTOA value to at least one of a plurality of user equipments (UEs) to measure the out-of-sync base stations; and', 'transmitting the BSTOA value.
4. A method for time synchronizing a plurality of base stations in a wireless communication system, comprising:
scheduling a plurality of cell timing measurements of at least one of a plurality of base stations;
making the cell timing measurements, wherein the making of the cell timing measurements includes:
blanking a downlink physical synchronization channel in the plurality of base stations;
receiving a burst signal in one of a plurality of base stations; and
measuring the burst signal at the one of the plurality of base stations;
developing a plurality of time drift factor values for the at least one of the plurality of base stations; and
scheduling periodic time update transmissions to the at least one of the plurality of base stations.', 'scheduling a plurality of cell timing measurements of at least one of a plurality of base stations;', 'making the cell timing measurements, wherein the making of the cell timing measurements includes:', 'blanking a downlink physical synchronization channel in the plurality of base stations;', 'receiving a burst signal in one of a plurality of base stations; and', 'measuring the burst signal at the one of the plurality of base stations;', 'developing a plurality of time drift factor values for the at least one of the plurality of base stations; and', 'scheduling periodic time update transmissions to the at least one of the plurality of base stations.', "5. A base station (BS) for a wireless digital system with the ability to time synchronize to at least one of a plurality of other base stations, comprising:
circuitry configured to detect at least one of a plurality of out-of-sync base stations;
circuitry configured to measure a plurality of cell timing signal values;
circuitry configured to receive a measured and sent base station time of arrival (BSTOA) value from the out-of-sync base station;
circuitry configured to correct the at least one of out-of-sync base stations, wherein the circuitry configured to correct includes circuitry configured to compare the at least one out-of-sync base station's BSTOA value with a stored BSTOA value found in a covariant matrix database;
circuitry configured to transmit a correction message and receive a report; and
circuitry configured to update the covariant matrix database from data from the report.", 'circuitry configured to detect at least one of a plurality of out-of-sync base stations;', 'circuitry configured to measure a plurality of cell timing signal values;', 'circuitry configured to receive a measured and sent base station time of arrival (BSTOA) value from the out-of-sync base station;', "circuitry configured to correct the at least one of out-of-sync base stations, wherein the circuitry configured to correct includes circuitry configured to compare the at least one out-of-sync base station's BSTOA value with a stored BSTOA value found in a covariant matrix database;", 'circuitry configured to transmit a correction message and receive a report; and', 'circuitry configured to update the covariant matrix database from data from the report.
6. The base station of claim 5 wherein the circuitry configured to detect includes:
updating a covariant matrix database with the plurality of cell timing signal values; and further circuitry configured to determine an out-of-sync base station from at least one of plurality cell timing signals.', 'updating a covariant matrix database with the plurality of cell timing signal values; and further circuitry configured to determine an out-of-sync base station from at least one of plurality cell timing signals.
7. A base station (BS) for a wireless digital system with the ability to time synchronize a plurality of other base stations, comprising:
circuitry configured to schedule a plurality of time sync measurements from at least one of a plurality of other base stations;
circuitry configured to develop a time sync drift pattern for the at least one of the plurality of other base stations and;
circuitry configured to schedule periodic update transmissions to the at least one of the plurality of other base stations;
circuitry configured to blank a plurality of downlink physical synchronization channels in a plurality of base stations; and
circuitry configured to send a burst signal to at least one of the plurality of base stations to measure a BSTOA value from at least one of the plurality of base stations.', 'circuitry configured to schedule a plurality of time sync measurements from at least one of a plurality of other base stations;', 'circuitry configured to develop a time sync drift pattern for the at least one of the plurality of other base stations and;', 'circuitry configured to schedule periodic update transmissions to the at least one of the plurality of other base stations;', 'circuitry configured to blank a plurality of downlink physical synchronization channels in a plurality of base stations; and', 'circuitry configured to send a burst signal to at least one of the plurality of base stations to measure a BSTOA value from at least one of the plurality of base stations.', '8. A base station (BS) for a wireless digital system with the ability to time synchronize a plurality of other base stations and which minimizes service interruption needed to time synchronize, comprising:
circuitry configured to schedule a plurality of time sync measurements from at least one of a plurality of other base stations;
circuitry configured to develop a time sync drift pattern for the at least one of the plurality of other base stations;
circuitry configured to schedule periodic frequency update transmissions to the at least one of the plurality of other base stations;
circuitry configured to blank a plurality of downlink physical synchronization channels in a plurality of base stations; and
circuitry configured to send a burst signal to at least one of a plurality of base stations to measure a BSTOA value from at least one of a plurality of base stations.', 'circuitry configured to schedule a plurality of time sync measurements from at least one of a plurality of other base stations;', 'circuitry configured to develop a time sync drift pattern for the at least one of the plurality of other base stations;', 'circuitry configured to schedule periodic frequency update transmissions to the at least one of the plurality of other base stations;', 'circuitry configured to blank a plurality of downlink physical synchronization channels in a plurality of base stations; and', 'circuitry configured to send a burst signal to at least one of a plurality of base stations to measure a BSTOA value from at least one of a plurality of base stations.']
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ClaimChart-US7813311B2-STO
Patent number:US7813311B2
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