CA2187063A1 - Synchronization of a timepiece to a reference time - Google Patents
Synchronization of a timepiece to a reference timeInfo
- Publication number
- CA2187063A1 CA2187063A1 CA002187063A CA2187063A CA2187063A1 CA 2187063 A1 CA2187063 A1 CA 2187063A1 CA 002187063 A CA002187063 A CA 002187063A CA 2187063 A CA2187063 A CA 2187063A CA 2187063 A1 CA2187063 A1 CA 2187063A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- time
- timepiece
- date
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000000034 method Methods 0.000 claims abstract 34
- 230000005540 biological transmission Effects 0.000 claims abstract 11
- 238000012937 correction Methods 0.000 claims abstract 2
- 238000012545 processing Methods 0.000 claims 3
- 230000001360 synchronised effect Effects 0.000 claims 2
- 238000012360 testing method Methods 0.000 claims 2
- 230000004075 alteration Effects 0.000 claims 1
- 238000012790 confirmation Methods 0.000 claims 1
- 230000008054 signal transmission Effects 0.000 claims 1
- 230000001934 delay Effects 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/14—Setting the time according to the time information carried or implied by the radio signal the radio signal being a telecommunication standard signal, e.g. GSM
-
- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R40/00—Correcting the clock frequency
- G04R40/06—Correcting the clock frequency by computing the time value implied by the radio signal
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
Abstract
A method and apparatus for synchronizing a timepiece to a reference time includes the preparation of an encoded and/or encrypted signal for transmission from a paging network transmitter. The signal, which contains a time message and information on Daylight Saving changes and corrections to UTC time, is transmitted a number of times in a twenty-four hour period, with brief intervals between each transmission. A
timepiece has a receiver and control circuitry which receive and decode the signal.
The decoded time information is used to automatically set the time of the timepiece to the correct time for a predetermined time zone. A locality switch is provided on the timepiece to determine which time zone time is to be displayed. To correct for delays which may be encountered in queuing and transmission, a second signal may be transmitted as a result of the first signal being received by a monitor, the second signal including information about the time of receipt of the first signal by the monitor, such that the timepiece, upon receipt of the second signal, is able to correct for any delays, and to then display accurate time.
timepiece has a receiver and control circuitry which receive and decode the signal.
The decoded time information is used to automatically set the time of the timepiece to the correct time for a predetermined time zone. A locality switch is provided on the timepiece to determine which time zone time is to be displayed. To correct for delays which may be encountered in queuing and transmission, a second signal may be transmitted as a result of the first signal being received by a monitor, the second signal including information about the time of receipt of the first signal by the monitor, such that the timepiece, upon receipt of the second signal, is able to correct for any delays, and to then display accurate time.
Claims (49)
1. A method of synchronizing a timepiece to a reference time, including the steps of:
generating a signal which includes information relating to said reference time;
transmitting said signal from a transmitter;
receiving said signal at or in the vicinity of said timepiece;
processing said signal to enable said timepiece to display a time, or generate an output representative of said time, said time being the correct time for a preset zone, locality or offset.
generating a signal which includes information relating to said reference time;
transmitting said signal from a transmitter;
receiving said signal at or in the vicinity of said timepiece;
processing said signal to enable said timepiece to display a time, or generate an output representative of said time, said time being the correct time for a preset zone, locality or offset.
2. A method according to claim 1, characterized in that said signal is encoded and/or encrypted.
3. A method according to claim 1 or claim 2, in which said signal is transmittedfrom a plurality of transmitters, but not necessarily at the same time.
4. A method according to any preceding claim, characterized in that said signal is transmitted only once in a twenty-four hour period.
5. A method according to any one of claims 1 to 3, characterized in that said signal is transmitted a number of times in a period of time, each twenty-four hours.
6. A method according to claim 5, characterized in that each transmission is spaced from the succeeding transmission by a predetermined period of time.
7. A method according to claim 6, characterized in that said signal is transmitted six times, with an interval of about five minutes between each transmission.
8. A method according to any one of claims 5 to 7, characterized in that once a predetermined number of good signals is received, no further processing takes place.
9. A method according to any one of claims 5 to 8, characterized in that the transmissions commence in the early hours of the morning, local time.
10. A method according to claim 1, characterized in that the signal contains thefollowing information:
an identity code;
UTC time;
the digital inverse of the previous UTC time;
UTC date;
date of next (if any) leap-second update; and time zone data.
an identity code;
UTC time;
the digital inverse of the previous UTC time;
UTC date;
date of next (if any) leap-second update; and time zone data.
11. A method according to any one of claims 1 to 9, characterized in that the signal contains the following information:
an identity code;
local time;
the digital inverse of local time;
the local date;
date of next (if any) leap-second update; and time zone data.
an identity code;
local time;
the digital inverse of local time;
the local date;
date of next (if any) leap-second update; and time zone data.
12. A method according to any one of claims 1 to 9, characterized in that the format of the signal is:
<ID><Time></Time><Date><Leap-Second Date><Time Zone Data>
<ID><Time></Time><Date><Leap-Second Date><Time Zone Data>
13. A method according to claim 10, claim 11 or claim 12, characterized in that the time zone data includes data for each of a predetermined number of time zones.
14. A method according to claim 13, characterized in that the predetermined number is 16.
15. A method according to claim 13 or claim 14, characterized in that the signal is comprised of the time for each zone in plus or minus intervals from a reference time, together with date (if any) of the next daylight saving change and the direction of change.
16. A method according to claim 15, characterized in that said reference time isUTC time.
17. A method according to claim 15, characterized in that said reference time iscorrect local time.
18. Apparatus for synchronizing a timepiece to a reference time, characterized by:
means to receive and decode a transmitted signal, said signal including information relating to said reference time;
means to extract from the decoded signal information relating to the correct time for a preset time zone, locality or offset; and means to display or to output said correct time.
means to receive and decode a transmitted signal, said signal including information relating to said reference time;
means to extract from the decoded signal information relating to the correct time for a preset time zone, locality or offset; and means to display or to output said correct time.
19. Apparatus according to claim 18, further characterized by means for calculating the drift of said timepiece over a period of time by comparing the time of said timepiece with said reference time or a derivative thereof, thus enabling said timepiece to become self-calibrating.
20. Apparatus according to claim 18 or claim 19, further characterized by means to ensure that when said apparatus is powered up, said apparatus remains in a signal receive mode until the next signal transmission takes places, unless there occurs a manual time setting operation.
21. Apparatus according to any one of claims 18 to 20, further characterized by a locality switch which is adapted to be set to a particular zone, locality or offset, thus causing the correct time for that zone, locality or offset to be displayed.
22. Apparatus according to any one of claims 18 to 21, further characterized by means adapted to store daylight saving change information, so that in the absence of a specific signal, a time correction can still be made on the date and at the time specified for that change.
23. Apparatus according to any one of claims 18 to 22, further characterized by means to facilitate the display of the date and time of the next daylight saving change.
24. Apparatus according to any one of claims 18 to 23, further characterized by means to facilitate the display of the fact that the time is daylight saving time.
25. Apparatus according to any one of claims 18 to 24, further characterized by means to facilitate the display of the fact that the displayed time is not reliable.
26. Apparatus according to any one of claims 18 to 25, further characterized by means to facilitate the display of the fact that the timepiece is out of range of a transmitter of the said signal.
27. A timepiece adapted to be synchronized to a reference time, characterized by:
receiver means adapted to receive a signal containing time zone data for a plurality of time zones;
control circuitry for decoding said signal; and locality switch means for selecting one of a number of predetermined time régimes;
such that said circuitry sends to a display, or to other apparatus, a time signal representative of the correct time for the selected predetermined time régimes.
receiver means adapted to receive a signal containing time zone data for a plurality of time zones;
control circuitry for decoding said signal; and locality switch means for selecting one of a number of predetermined time régimes;
such that said circuitry sends to a display, or to other apparatus, a time signal representative of the correct time for the selected predetermined time régimes.
28. A timepiece adapted to receive and decode a signal containing time zone datafor a number of time zones, and data on daylight saving changes, characterized by:
means to store said data on daylight saving changes so that the time alteration consequent upon said changes may be effected for that timepiece on a stated time and date, even if no further signal is received.
means to store said data on daylight saving changes so that the time alteration consequent upon said changes may be effected for that timepiece on a stated time and date, even if no further signal is received.
29. A method of setting a timepiece in accordance with a signal containing data on daylight saving time changes, characterized by:
transmitting said signal;
receiving said signal at or in the vicinity of a timepiece;
decoding said signal;
storing said data; and setting, at a time and on a date contained in said data, said timepiece to a newtime.
transmitting said signal;
receiving said signal at or in the vicinity of a timepiece;
decoding said signal;
storing said data; and setting, at a time and on a date contained in said data, said timepiece to a newtime.
30. A method of synchronizing a timepiece to a reference time, characterized by the steps of:
generating a signal which includes information relating to said reference time;
transmitting said signal from a transmitter;
receiving said signal at or in the vicinity of said timepiece; and processing said signal to enable said timepiece to display a time, or generate an output representative of said time, said time being the correct time for a preset zone, locality or offset.
generating a signal which includes information relating to said reference time;
transmitting said signal from a transmitter;
receiving said signal at or in the vicinity of said timepiece; and processing said signal to enable said timepiece to display a time, or generate an output representative of said time, said time being the correct time for a preset zone, locality or offset.
31. Apparatus for synchronizing a timepiece to a reference time, characterized by:
means to receive and decode a transmitted signal, said signal including information relating to said reference time;
means to extract from the decoded signal information relating to the correct time for a preset zone, locality or offset; and means to display or to output said correct time.
means to receive and decode a transmitted signal, said signal including information relating to said reference time;
means to extract from the decoded signal information relating to the correct time for a preset zone, locality or offset; and means to display or to output said correct time.
32. A method of synchronizing a timepiece to a reference time, characterized by the steps of:
generating a first signal;
transmitting said first signal;
receiving said first signal;
composing a second signal consequent upon receipt of said first signal, said second signal including information relating to the precise time of receipt of said first signal; and transmitting said second signal.
generating a first signal;
transmitting said first signal;
receiving said first signal;
composing a second signal consequent upon receipt of said first signal, said second signal including information relating to the precise time of receipt of said first signal; and transmitting said second signal.
33. A method according to claim 32, characterized in that said signal is transmitted within a predetermined time interval from the transmission of said first signal.
34. A method according to claim 32 or claim 33, characterized in that both said first signal and said second signal include additional information.
35. A method according to claim 32 or claim 33, characterized in that said firstsignal is merely a mark, and said second includes all other information.
36. A method according to any one of claims 32 to 35, characterized in that saidtimepiece, on receipt of said first signal, commences a count, and on receipt of said second signal, uses said count and information in said second signal to generateaccurate time.
37. A system for synchronizing a timepiece to a reference timepiece, said systemcharacterized by means connected to a transmitter, said transmitter being adapted to transmit a first signal to a timepiece, said means being adapted to receive said first signal and to compose a second signal including information on the precise time of receipt of said first signal, said second signal being adapted to be transmitted by said transmitter.
38. A system according to claim 37, characterized in that said second signal is transmitted within a predetermined time after the transmission of said first signal.
39. A system for synchronizing a timepiece to a reference time, said system being characterized by:
means to generate a first signal;
transmission means to transmit said first signal;
monitor means connected to said monitor means for receiving said first signal and for composing a second signal related to said first signal, said signal thereafter being transmitted by said transmission means; and means associated with said timepiece for commencing a count and receipt of said first signal, and for using the information from said count and from information contained in said second signal to generate accurate time.
means to generate a first signal;
transmission means to transmit said first signal;
monitor means connected to said monitor means for receiving said first signal and for composing a second signal related to said first signal, said signal thereafter being transmitted by said transmission means; and means associated with said timepiece for commencing a count and receipt of said first signal, and for using the information from said count and from information contained in said second signal to generate accurate time.
40. A system according to claim 39, further characterized by means associated with said receiver for correlating whether said second signal and said first signal relate to the same transmitting area, such that if they are not, the second signal is discounted.
41. A method according to claim 1, further characterized by the step of:
including in said signal instructions which are adapted to enable and/or disablea feature of said timepiece.
including in said signal instructions which are adapted to enable and/or disablea feature of said timepiece.
42. A method according to claim 1, further characterized by the step of:
including in said signal information which is adapted to be decoded at said timepiece, and thereafter displayed as a message or the like.
including in said signal information which is adapted to be decoded at said timepiece, and thereafter displayed as a message or the like.
43. In a method of synchronizing a timepiece to a reference time, where a signal is transmitted to said timepiece to enable the time kept or displayed by said timepiece to be synchronized to a reference time, the step of including additional information in said signal, such that said additional information, when received by a timepiece, results in a predetermined message or the like being displayed.
44. In a method according to claim 43, the further step of including in said signal instructions which are adapted to enable and/or disable a function of said timepiece, including the function of being able to display a message.
33 46. A method according to claim 12, characterized in that said signal includes aplurality of Cap.Codes, which enables groups or classes of timepieces to be addressed, and an individual timepiece to be addressed.
46. A method according to claim 12, characterized in that said signal includes an internal address within the format of said signal, to enable groups or classes of the total numbers of timepieces to be addressed, and an individual timepiece to be addressed.
47. A method of synchronizing a timepiece to a reference time, characterized by the steps of:
generating a first signal;
transmitting said first signal;
receiving said first signal;
composing a second signal consequent upon receipt of said first signal, said second signal including information relating to the precise time of receipt of said first signal;
transmitting said second signal;
composing a third signal consequent upon said first and/or said second signals being tested to determine whether said timepiece is displaying accurate time; and transmitting said third signal.
generating a first signal;
transmitting said first signal;
receiving said first signal;
composing a second signal consequent upon receipt of said first signal, said second signal including information relating to the precise time of receipt of said first signal;
transmitting said second signal;
composing a third signal consequent upon said first and/or said second signals being tested to determine whether said timepiece is displaying accurate time; and transmitting said third signal.
48. A method according to claim 47, characterized in that said third signal, if said test indicates that accurate time is displayed, is a "confirmation" signal.
49. A method according to claim 47, characterized in that said third signal, if said test indicates that accurate time is not displayed, is an "ignore" signal.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002187063A CA2187063A1 (en) | 1996-10-03 | 1996-10-03 | Synchronization of a timepiece to a reference time |
| NZ314712A NZ314712A (en) | 1996-10-03 | 1997-04-30 | Apparatus for synchronising a timepiece from a first signal by generation of second and third signals |
| PCT/AU1997/000659 WO1998014842A1 (en) | 1996-10-03 | 1997-10-03 | Synchronization of a timepiece to a reference time |
| AU43723/97A AU4372397A (en) | 1996-10-03 | 1997-10-03 | Synchronization of a timepiece to a reference time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002187063A CA2187063A1 (en) | 1996-10-03 | 1996-10-03 | Synchronization of a timepiece to a reference time |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2187063A1 true CA2187063A1 (en) | 1998-04-03 |
Family
ID=4159019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002187063A Abandoned CA2187063A1 (en) | 1996-10-03 | 1996-10-03 | Synchronization of a timepiece to a reference time |
Country Status (4)
| Country | Link |
|---|---|
| AU (1) | AU4372397A (en) |
| CA (1) | CA2187063A1 (en) |
| NZ (1) | NZ314712A (en) |
| WO (1) | WO1998014842A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6223050B1 (en) | 1997-12-09 | 2001-04-24 | Bellsouth Intellectual Property Management Corporation | System and method for automatically setting a remote timepiece with the correct time |
| SG81231A1 (en) * | 1998-05-25 | 2001-06-19 | Nanyang Polytechnic | Wireless synchronous clock system |
| JP2001004764A (en) * | 1999-06-16 | 2001-01-12 | Matsushita Electric Ind Co Ltd | Clock device |
| DE10056492A1 (en) * | 2000-11-15 | 2002-05-23 | Bsh Bosch Siemens Hausgeraete | Information provision method for domestic appliances uses distributed network coupled to each appliance |
| CN1460354A (en) * | 2000-12-20 | 2003-12-03 | 高通股份有限公司 | Time synchronization in cellular network device |
| DE10301100A1 (en) | 2003-01-08 | 2004-07-22 | Deutsche Telekom Ag | Telecommunications-based timestamp |
| US7720467B2 (en) | 2003-12-17 | 2010-05-18 | Sharp Laboratories Of America, Inc. | User notification for digital mobile phones |
| EP2506094A1 (en) * | 2011-03-31 | 2012-10-03 | Artstate Technology Limited | Analog electronic timepiece with perpetual calender information |
| US9910419B2 (en) | 2013-09-09 | 2018-03-06 | Harnischfeger Technologies, Inc. | System and method of synchronizing time between multiple systems |
| CN109001970B (en) * | 2017-06-07 | 2021-09-24 | 精工爱普生株式会社 | Timepiece device, electronic apparatus, and moving object |
| CN107966673B (en) * | 2017-12-14 | 2020-06-09 | 宁波三星医疗电气股份有限公司 | Simple and effective clock management method for electric energy meter |
| CN114019888B (en) * | 2022-01-07 | 2022-07-12 | 智道网联科技(北京)有限公司 | Communication control circuit and method for vehicle-mounted device, vehicle-mounted device and vehicle |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH670545GA3 (en) * | 1987-10-28 | 1989-06-30 | ||
| CA2091962A1 (en) * | 1992-03-31 | 1993-10-01 | Mark L. Witsaman | Clock synchronization system |
| GB9207861D0 (en) * | 1992-04-09 | 1992-05-27 | Philips Electronics Uk Ltd | A method of time measurement in a communications system,a communications system and a receiving apparatus for use in the system |
| DE4313945A1 (en) * | 1993-04-28 | 1994-11-03 | Diehl Gmbh & Co | Method and devices for disseminating standard time information |
| GB2296166B (en) * | 1994-11-29 | 1999-07-07 | Plessey Telecomm | Clock synchronisation |
| AU5472396A (en) * | 1995-06-05 | 1996-12-19 | H.P.M. Technologies Pty. Ltd. | Improvements in the synchronization of a timepiece to a reference time |
-
1996
- 1996-10-03 CA CA002187063A patent/CA2187063A1/en not_active Abandoned
-
1997
- 1997-04-30 NZ NZ314712A patent/NZ314712A/en unknown
- 1997-10-03 WO PCT/AU1997/000659 patent/WO1998014842A1/en active Application Filing
- 1997-10-03 AU AU43723/97A patent/AU4372397A/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU4372397A (en) | 1998-04-24 |
| NZ314712A (en) | 1998-08-26 |
| WO1998014842A1 (en) | 1998-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |