CA2475495A1 - Method and apparatus for synchronizing base stations - Google Patents
Method and apparatus for synchronizing base stations Download PDFInfo
- Publication number
- CA2475495A1 CA2475495A1 CA002475495A CA2475495A CA2475495A1 CA 2475495 A1 CA2475495 A1 CA 2475495A1 CA 002475495 A CA002475495 A CA 002475495A CA 2475495 A CA2475495 A CA 2475495A CA 2475495 A1 CA2475495 A1 CA 2475495A1
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- CA
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- Prior art keywords
- base station
- sync
- base stations
- bstoa
- sync base
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
- H04B7/2678—Time synchronisation
- H04B7/2687—Inter base stations synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2662—Arrangements for Wireless System Synchronisation
- H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
- H04B7/2678—Time synchronisation
- H04B7/2687—Inter base stations synchronisation
- H04B7/269—Master/slave synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
Abstract
Method and apparatus for synchronizing base stations (30¿n?) employing an independent synchronous source or identifying a base station (30¿n?) as a master source. An RNC (C-RNC) (36, 38, 40) or a base station (30¿n?) may designate one base station (30¿n?) or UE (20, 22, 24) to acquire measurements derived from base stations (30¿n?) 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.
Claims (26)
1. A method for time synchronizing a plurality of base stations in a wireless communication system, comprising:
a) detecting at least one of a plurality of out-of-sync base stations;
a1) determining a base station having a better time synchronization quality than the at least one out-of-sync base station;
b) measuring a plurality of cell timing signals including a cell time signal measured by the better time synchronization quality base station; and c) correcting the at least one of a plurality of out-of-sync base stations based on the cell timing signal measurements and not using timing signal measurements from any base stations having a time synchronization quality worse than the at least one of a plurality of out-of-sync base stations.
a) detecting at least one of a plurality of out-of-sync base stations;
a1) determining a base station having a better time synchronization quality than the at least one out-of-sync base station;
b) measuring a plurality of cell timing signals including a cell time signal measured by the better time synchronization quality base station; and c) correcting the at least one of a plurality of out-of-sync base stations based on the cell timing signal measurements and not using timing signal measurements from any base stations having a time synchronization quality worse than the at least one of a plurality of out-of-sync base stations.
2. The method of claim 1 wherein the step (a) comprises:
d) updating a covariant matrix database; and e) determining at least one out-of-sync base station from the plurality of cell timing signals.
d) updating a covariant matrix database; and e) determining at least one out-of-sync base station from the plurality of cell timing signals.
3. The method of claim 1 wherein step (b) comprises:
sending a request for a base station time of arrival (BSTOA) value from a radio network controller (RNC) to at least one of the out-of sync base stations; and transmitting said BSTOA value.
sending a request for a base station time of arrival (BSTOA) value from a radio network controller (RNC) to at least one of the out-of sync base stations; and transmitting said BSTOA value.
4. The method of claim 2 wherein step (b) comprises:
sending a request for a base station time of arrival (BSTOA) value from a radio network controller (RNC) to at least one of the out-of-sync base stations; and transmitting said BSTOA value.
sending a request for a base station time of arrival (BSTOA) value from a radio network controller (RNC) to at least one of the out-of-sync base stations; and transmitting said BSTOA value.
5. The method of claim 1 wherein the step (b) comprises:
f) sending a request for a base station time of arrival (BSTOA) value from a radio network controller's (RNC's) to at least one of a plurality of user equipment (UE) to measure the out-of-sync base stations; and g) transmitting said BSTOA value.
f) sending a request for a base station time of arrival (BSTOA) value from a radio network controller's (RNC's) to at least one of a plurality of user equipment (UE) to measure the out-of-sync base stations; and g) transmitting said BSTOA value.
6. The method of claim 2 wherein the step (b) comprises:
f) sending a request for a base station time of arrival (BSTOA) value from a radio network controller's (RNC's) to at least one of a plurality of User Equipment to measure the out-of-sync base stations; and g) transmitting said BSTOA value.
f) sending a request for a base station time of arrival (BSTOA) value from a radio network controller's (RNC's) to at least one of a plurality of User Equipment to measure the out-of-sync base stations; and g) transmitting said BSTOA value.
7. The method of claim 3 wherein the step (c) correcting comprises:
comparing said BSTOA value with a stored BSTOA value;
generating a correction message;
transmitting said correction message to the out-of-sync base station;
transmitting a report from the out-of-sync base station to said RNC; and updating a covariant matrix database.
comparing said BSTOA value with a stored BSTOA value;
generating a correction message;
transmitting said correction message to the out-of-sync base station;
transmitting a report from the out-of-sync base station to said RNC; and updating a covariant matrix database.
8. The method of claim 4 wherein the stop (c) correcting comprises:
comparing said BSTOA value with a stared BSTOA value;
generating a correction message;
transmitting said correction message to the out-of-sync base station;
transmitting a report from the out-of-sync base station to said RNC; and updating said covariant matrix database.
comparing said BSTOA value with a stared BSTOA value;
generating a correction message;
transmitting said correction message to the out-of-sync base station;
transmitting a report from the out-of-sync base station to said RNC; and updating said covariant matrix database.
9. The method of claim 7 further comprising maintaining the covariant matrix database on said RNC.
10. The method of claim 8 further comprising maintaining the covariant matrix database on said RNC.
11. The method of claim 9 wherein at least one out-of-sync base station or at least one UE
is under control of at least two different RNCs, the method further comprising:
establishing a communications path between the at least two different RNCs;
and performing base station synchronizing.
is under control of at least two different RNCs, the method further comprising:
establishing a communications path between the at least two different RNCs;
and performing base station synchronizing.
12. The method of claim 10 wherein at least one out-of-sync base station or at least one UE is under control of at least two different RNCs, the method further comprising:
establishing a communications path between the at least two different RNCs;
and performing base station synchronizing.
establishing a communications path between the at least two different RNCs;
and performing base station synchronizing.
13. A method for autonomous time synchronizing a pair of base stations in a wireless communication system, comprising:
detecting an adjacent out-of-sync base station having a worse time synchronization quality than the other base station of the pair;
measuring a plurality of cell timing signals including a cell timing signal measured by the detected adjacent base station; and correcting the adjacent out-of-sync base station from values obtained from a RNC's database including the other base station of the pair and not including base stations having a worse time synchronization, quality than the detected adjacent base station.
detecting an adjacent out-of-sync base station having a worse time synchronization quality than the other base station of the pair;
measuring a plurality of cell timing signals including a cell timing signal measured by the detected adjacent base station; and correcting the adjacent out-of-sync base station from values obtained from a RNC's database including the other base station of the pair and not including base stations having a worse time synchronization, quality than the detected adjacent base station.
14. 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, said base station comprising:
means for detecting at least one of a plurality of out-of-sync base stations, the at least one of a plurality of out-of-sync base stations having a time synchronization quality worse than the base station;
means for measuring a plurality of cell timing signal values; and means for correcting the at least one of out-of-sync base stations, the correcting not using cell timing signal values of any base stations having a time synchronization quality worse than the at least one of a plurality of out-of-sync base stations.
means for detecting at least one of a plurality of out-of-sync base stations, the at least one of a plurality of out-of-sync base stations having a time synchronization quality worse than the base station;
means for measuring a plurality of cell timing signal values; and means for correcting the at least one of out-of-sync base stations, the correcting not using cell timing signal values of any base stations having a time synchronization quality worse than the at least one of a plurality of out-of-sync base stations.
15. The base station of claim 14 wherein said means for detecting includes:
updating a covariant matrix database with the plurality of cell timing signal values;
and further means for determining 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 means for determining an out-of-sync base station from at least one of plurality cell timing signals.
16. The base station of claim 14 wherein said out-of sync base station has means to measure and send a base station time of arrival (BSTOA) value.
17. The base station of claim 15 wherein said out-of-sync base station has means to measure and send a base station time of arrival (BSTOA) value.
18. The base station of claim 16 wherein said means for correcting includes:
means to compare the at least one out-of-sync base station's BSTOA value with a stored BSTOA value found in said covariant matrix database; and said out-of-sync base station having:
means to receive a correction message and responding by transmitting a report and means for the out-of-sync base station to update the covariant matrix database from data from said report.
means to compare the at least one out-of-sync base station's BSTOA value with a stored BSTOA value found in said covariant matrix database; and said out-of-sync base station having:
means to receive a correction message and responding by transmitting a report and means for the out-of-sync base station to update the covariant matrix database from data from said report.
19. The base station of claim 17 wherein said means for correcting includes:
means to compare the at least one out-of-sync base station's BSTOA value with a stored BSTOA value found in said covariant matrix database; and said out-of-sync base station having:
means to receive a correction message and responding by transmitting a report and means for the out-of-sync base station to update the covariant matrix database from data from said report.
means to compare the at least one out-of-sync base station's BSTOA value with a stored BSTOA value found in said covariant matrix database; and said out-of-sync base station having:
means to receive a correction message and responding by transmitting a report and means for the out-of-sync base station to update the covariant matrix database from data from said report.
20. A method for time synchronizing 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; and correcting the at least one of a plurality of out-of-sync base stations, not using any measured cell timing signals from base stations having a worse time synchronization quality than the at least one of a plurality of out-of-sync base stations.
detecting at least one of a plurality of out-of-sync base stations;
measuring a plurality of cell timing signals; and correcting the at least one of a plurality of out-of-sync base stations, not using any measured cell timing signals from base stations having a worse time synchronization quality than the at least one of a plurality of out-of-sync base stations.
21. The method of claim 20 wherein time step of detecting comprises.
updating a radio network controller's (RNC's) covariant matrix database; and determining an out-of-sync base station from at least one of plurality cell timing signals.
updating a radio network controller's (RNC's) covariant matrix database; and determining an out-of-sync base station from at least one of plurality cell timing signals.
22. The method of claim 21 wherein the step of measuring comprises:
sending a request for a base station time of arrival (BSTOA) value from the RNC to at least one of the out-of-sync base stations; and transmitting said BSTOA value to the RNC.
sending a request for a base station time of arrival (BSTOA) value from the RNC to at least one of the out-of-sync base stations; and transmitting said BSTOA value to the RNC.
23. The method of claim 22 wherein the step of measuring comprises:
sending a request for a base station time of a rival (BSTOA) value from the RNC to at least one of the out-of-sync base stations; and transmitting said BSTOA value to the RNC.
sending a request for a base station time of a rival (BSTOA) value from the RNC to at least one of the out-of-sync base stations; and transmitting said BSTOA value to the RNC.
24. A method for autonomous time synchronizing in a wireless communication system, the method comprising:
detecting an adjacent out-of-sync base station;
measuring a plurality of cell timing signals; and correcting the at least one of a plurality of out-of-sync base stations from values from a RNC's database, not using any measured cell timing signals from base stations having a worse time synchronization quality than the at least one of a plurality of out-of-sync base stations.
detecting an adjacent out-of-sync base station;
measuring a plurality of cell timing signals; and correcting the at least one of a plurality of out-of-sync base stations from values from a RNC's database, not using any measured cell timing signals from base stations having a worse time synchronization quality than the at least one of a plurality of out-of-sync base stations.
25. A method for time synchronizing out-of-sync base stations to a master base station in a wireless communication system, the method, comprising:
a) detecting at least one of said out-of-sync base stations, b) measuring a plurality of cell timing signals; and c) correcting the out-of-sync base stations based on step (b) and for each out-of sync base station being corrected, not using any measured cell timing signals from base stations having a worse time synchronization quality than that out-of-sync base station.
a) detecting at least one of said out-of-sync base stations, b) measuring a plurality of cell timing signals; and c) correcting the out-of-sync base stations based on step (b) and for each out-of sync base station being corrected, not using any measured cell timing signals from base stations having a worse time synchronization quality than that out-of-sync base station.
26. A method for frequency synchronizing one of a plurality of out-of-sync base stations to a master base station in a wireless communication system, comprising:
a) detecting said one of a plurality of out-of-sync base stations;
b) measuring a plurality of cell timing signals; and c) correcting the at least one of a plurality of out-of-sync base stations based on step (b) and for each out-of-sync base station being corrected, not using any measured cell timing signals from base stations having a worse frequency synchronization quality than that out-of-sync base station.
a) detecting said one of a plurality of out-of-sync base stations;
b) measuring a plurality of cell timing signals; and c) correcting the at least one of a plurality of out-of-sync base stations based on step (b) and for each out-of-sync base station being corrected, not using any measured cell timing signals from base stations having a worse frequency synchronization quality than that out-of-sync base station.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2644144A CA2644144C (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA002644135A CA2644135A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA002644128A CA2644128A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35573902P | 2002-02-05 | 2002-02-05 | |
| US60/355,739 | 2002-02-05 | ||
| US10/322,133 | 2002-12-18 | ||
| US10/322,133 US7813311B2 (en) | 2002-02-05 | 2002-12-18 | Method and apparatus for synchronizing base stations |
| PCT/US2003/003351 WO2003067769A2 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
Related Child Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002644128A Division CA2644128A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA002644135A Division CA2644135A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA2644144A Division CA2644144C (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2475495A1 true CA2475495A1 (en) | 2003-08-14 |
| CA2475495C CA2475495C (en) | 2011-07-26 |
Family
ID=27624945
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002644128A Abandoned CA2644128A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA2475495A Expired - Fee Related CA2475495C (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA002644135A Abandoned CA2644135A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA2644144A Expired - Fee Related CA2644144C (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002644128A Abandoned CA2644128A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002644135A Abandoned CA2644135A1 (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
| CA2644144A Expired - Fee Related CA2644144C (en) | 2002-02-05 | 2003-02-04 | Method and apparatus for synchronizing base stations |
Country Status (18)
| Country | Link |
|---|---|
| US (1) | US7813311B2 (en) |
| EP (2) | EP1675279B1 (en) |
| JP (3) | JP2005517340A (en) |
| KR (8) | KR100913801B1 (en) |
| CN (2) | CN100372255C (en) |
| AR (2) | AR038349A1 (en) |
| AT (2) | ATE323976T1 (en) |
| AU (1) | AU2003212929A1 (en) |
| CA (4) | CA2644128A1 (en) |
| DE (3) | DE20301635U1 (en) |
| DK (2) | DK1675279T3 (en) |
| ES (2) | ES2262979T3 (en) |
| HK (1) | HK1073946A1 (en) |
| MX (1) | MXPA04007593A (en) |
| MY (2) | MY141615A (en) |
| NO (1) | NO20043635L (en) |
| TW (4) | TWI261474B (en) |
| WO (1) | WO2003067769A2 (en) |
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