CA2600700A1 - Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system - Google Patents
Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system Download PDFInfo
- Publication number
- CA2600700A1 CA2600700A1 CA002600700A CA2600700A CA2600700A1 CA 2600700 A1 CA2600700 A1 CA 2600700A1 CA 002600700 A CA002600700 A CA 002600700A CA 2600700 A CA2600700 A CA 2600700A CA 2600700 A1 CA2600700 A1 CA 2600700A1
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- CA
- Canada
- Prior art keywords
- relative timing
- timing difference
- base stations
- mobile station
- estimate
- Prior art date
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Abstract
A method for estimating relative timing of base stations in an asynchronous mobile communications system comprises receiving at a first mobile station first and second downlink signals transmitted by first and second base stations;
transmitting an uplink signal from the first mobile station to the first and second base stations; and calculating estimated relative time difference between the time bases of the first and second base stations using receive times at the first and second base stations of said uplink signal, transmit times of the first and second downlink signals, and a time difference at the first mobile station between a receive time of the second downlink signal and the transmit time of said uplink signal to account for propagation delays between first and second mobile stations.
transmitting an uplink signal from the first mobile station to the first and second base stations; and calculating estimated relative time difference between the time bases of the first and second base stations using receive times at the first and second base stations of said uplink signal, transmit times of the first and second downlink signals, and a time difference at the first mobile station between a receive time of the second downlink signal and the transmit time of said uplink signal to account for propagation delays between first and second mobile stations.
Claims (9)
1. A method for facilitating timing between mobile stations and base stations in an asynchronous mobile telecommunications network, comprising the steps of:
receiving relative timing difference data from each of a plurality of mobile stations, the relative timing difference data from each mobile station including a measured difference between the time bases of at least two base stations as measured by said mobile stations;
determining a relative timing difference estimate based on the received relative timing difference data, the relative timing difference estimate representing an estimate of a difference between the time bases of at least two base stations;
accounting for propagation delays between a measuring mobile station and the at least two base stations of which the time base difference is measured in said relative timing difference estimate;
storing the relative timing difference estimate in a relative timing difference table;
transmitting the relative timing difference estimate to a receiving mobile station.
receiving relative timing difference data from each of a plurality of mobile stations, the relative timing difference data from each mobile station including a measured difference between the time bases of at least two base stations as measured by said mobile stations;
determining a relative timing difference estimate based on the received relative timing difference data, the relative timing difference estimate representing an estimate of a difference between the time bases of at least two base stations;
accounting for propagation delays between a measuring mobile station and the at least two base stations of which the time base difference is measured in said relative timing difference estimate;
storing the relative timing difference estimate in a relative timing difference table;
transmitting the relative timing difference estimate to a receiving mobile station.
2. The method of claim 1, wherein the relative timing difference estimate is determined by calculating a relative timing difference estimate value from a plurality of measured differences received from the plurality of mobile stations.
3. The method of claim 1, further comprising the steps of:
estimating an error range for the relative timing difference estimate; and transmitting the error range to the receiving mobile station.
estimating an error range for the relative timing difference estimate; and transmitting the error range to the receiving mobile station.
4. The method of claim 1, wherein the relative timing difference estimate transmitted to the receiving mobile station is used to estimate a position of the receiving mobile station.
5. The method of claim 1, wherein the relative timing difference estimate comprises the measured difference received from one of the plurality of mobile stations.
6. The method of claim 1, wherein the relative timing difference estimate transmitted to the receiving mobile station is used to assist in synchronizing the receiving mobile station with a cell.
7. The method of claim 1, wherein data from a neighbor cell list is transmitted along with the relative timing difference estimate.
8. An asynchronous mobile telecommunications system, comprising:
a plurality of base stations for transmitting data to and receiving data from a plurality of mobile stations, the plurality of base stations individually receiving relative timing difference data, the relative timing difference data from each mobile station comprising a measured difference between the time bases of two of the plurality of base stations as measured by the mobile station;
a register storing a relative timing difference table, each of a plurality of entries in said table comprising a relative timing difference estimate calculated from the relative timing difference data and said register storing error data for each relative timing difference estimate; and wherein a first one of the plurality of base stations transmits a relative timing difference estimate to a receiving mobile station to facilitate timing of communications between the mobile station and a second one of the plurality of base stations.
a plurality of base stations for transmitting data to and receiving data from a plurality of mobile stations, the plurality of base stations individually receiving relative timing difference data, the relative timing difference data from each mobile station comprising a measured difference between the time bases of two of the plurality of base stations as measured by the mobile station;
a register storing a relative timing difference table, each of a plurality of entries in said table comprising a relative timing difference estimate calculated from the relative timing difference data and said register storing error data for each relative timing difference estimate; and wherein a first one of the plurality of base stations transmits a relative timing difference estimate to a receiving mobile station to facilitate timing of communications between the mobile station and a second one of the plurality of base stations.
9. The system of claim 8, wherein the register further stores a neighbor cell list.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7449498P | 1998-02-12 | 1998-02-12 | |
| US60/074,494 | 1998-02-12 | ||
| US09/243,095 | 1999-02-02 | ||
| US09/243,095 US6526039B1 (en) | 1998-02-12 | 1999-02-02 | Method and system for facilitating timing of base stations in an asynchronous CDMA mobile communications system |
| CA002320996A CA2320996C (en) | 1998-02-12 | 1999-02-09 | Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002320996A Division CA2320996C (en) | 1998-02-12 | 1999-02-09 | Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2600700A1 true CA2600700A1 (en) | 1999-08-19 |
| CA2600700C CA2600700C (en) | 2010-05-04 |
Family
ID=38621174
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2600700A Expired - Lifetime CA2600700C (en) | 1998-02-12 | 1999-02-09 | Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system |
| CA2603277A Expired - Lifetime CA2603277C (en) | 1998-02-12 | 1999-02-09 | Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2603277A Expired - Lifetime CA2603277C (en) | 1998-02-12 | 1999-02-09 | Method and system for facilitating timing of base stations in an asynchronous cdma mobile communications system |
Country Status (1)
| Country | Link |
|---|---|
| CA (2) | CA2600700C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010083943A1 (en) | 2009-01-22 | 2010-07-29 | Arieso Limited | Determining differences between base station timing offset for pairs of base stations in asynchronous networks using location estimates |
| WO2012129730A1 (en) | 2011-03-31 | 2012-10-04 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and arrangements for estimating timing offset differences in a cellular network |
-
1999
- 1999-02-09 CA CA2600700A patent/CA2600700C/en not_active Expired - Lifetime
- 1999-02-09 CA CA2603277A patent/CA2603277C/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010083943A1 (en) | 2009-01-22 | 2010-07-29 | Arieso Limited | Determining differences between base station timing offset for pairs of base stations in asynchronous networks using location estimates |
| EP2605605A2 (en) | 2009-01-22 | 2013-06-19 | Arieso Limited | Asynchronous wireless communication system and method of geolocating a wireless communication unit in an asynchronous wireless communication system |
| US9250311B2 (en) | 2009-01-22 | 2016-02-02 | Jdsu Uk Limited | Asynchronous wireless communication system |
| US10231202B2 (en) | 2009-01-22 | 2019-03-12 | Viavi Solutions Uk Limited | Asynchronous wireless communication system |
| US10595292B2 (en) | 2009-01-22 | 2020-03-17 | Viavi Solutions Uk Limited | Asynchronous wireless communication system |
| WO2012129730A1 (en) | 2011-03-31 | 2012-10-04 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and arrangements for estimating timing offset differences in a cellular network |
| CN103548400A (en) * | 2011-03-31 | 2014-01-29 | 爱立信(中国)通信有限公司 | Methods and arrangements for estimating timing offset differences in a cellular network |
| EP2692183A4 (en) * | 2011-03-31 | 2015-11-25 | Ericsson Telefon Ab L M | Methods and arrangements for estimating timing offset differences in a cellular network |
| US9237541B2 (en) | 2011-03-31 | 2016-01-12 | Telefonaktiebolaget L M Ericsson (Publ) | Methods and arrangements for estimating timing offset differences in a cellular network |
| CN103548400B (en) * | 2011-03-31 | 2017-04-05 | 爱立信(中国)通信有限公司 | Method and apparatus for estimating the difference of the timing slip in cellular network |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2603277C (en) | 2011-01-25 |
| CA2603277A1 (en) | 1999-08-19 |
| CA2600700C (en) | 2010-05-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20190211 |