CN102082655A - Time compensation method, device and system - Google Patents
Time compensation method, device and system Download PDFInfo
- Publication number
- CN102082655A CN102082655A CN2010106145684A CN201010614568A CN102082655A CN 102082655 A CN102082655 A CN 102082655A CN 2010106145684 A CN2010106145684 A CN 2010106145684A CN 201010614568 A CN201010614568 A CN 201010614568A CN 102082655 A CN102082655 A CN 102082655A
- Authority
- CN
- China
- Prior art keywords
- time
- pps
- signal
- main equipment
- slave unit
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
The embodiment of the invention discloses a time compensation method. The method comprises the following steps that: main equipment transmits a pulse per second (1PPS) and time of date (TOD) signal to slave equipment, receives a falling edge of a feedback signal of the slave equipment in a first one-second period and calculates time difference t between the falling edge of the PPS transmitted by the main equipment and the falling edge of the feedback signal received by the main equipment to acquire line transmission delay time t'; and the main equipment transmits the line transmission delay time t' which is generated in the first one-second period to the slave equipment in a second one-second period, so that the slave equipment can correct and compensate the equipment according to delay data. The invention also discloses a time compensation device and a time compensation system. By using the technical scheme provided by the embodiment of the invention, the accuracy of 1PPS and TOD transmission time can be guaranteed, the delay for 1PPS and TOD time signal transmission lines of the main equipment and the slave equipment is automatically detected and compensated, and labor cost is reduced.
Description
Technical field
The present invention relates to the time synchronized field, specifically, relate to a kind of methods, devices and systems of communication apparatus time bias.
Background technology
Split-second precision ground is transmitted the appearance of demand along with TD-SCDMA, TD-LTE system, require the network equipment and base station equipment etc. that various types of split-second precision methods of synchronization can be provided, wherein a kind of mode adopts 1 pulse per second (PPS)+Time of Day (1pps+TOD) time interface to carry out time synchronized, makes the lock in time precision less than 1 microsecond.
1pps+TOD signal definition that adopts in this method of synchronization such as figure one, main equipment is by sending the 1pps+TOD signal toward slave unit, and the 1pps+TOD signal that slave unit reception main equipment sends over also parses temporal information, as shown in Figure 1.
Concrete mode is, for 1PPS signal pulse second, as edge on time, wherein the rise time was generally less than for 50 nanoseconds with rising edge, so error effect can be ignored, and its pulsewidth is generally 20ms～200ms.
For the TOD signal, generally behind the 1ms of the rising edge of PPS signal pulse, begin to transmit TOD information, and in 500ms, passed, this TOD message indicates the current 1PPS rising edge time.Wherein, TOD protocol massages transmission frequency is generally per second 1 time, and its signal baud rate generally is defaulted as 9600, no parity, and 1 start bit (representing) with low level, 1 position of rest (representing with high level), idle frame are high level, 8 data bit.
But since main equipment by cable when the slave unit transmission 1PPS+TOD time signal, the cable transmission signal all can produce time-delay, at this moment can cause 1PPS+TOD transmission time precise decreasing, so slave unit need compensate to transmission line.
In the actual treatment, just need when project installation, measure the length of cable of the actual use of master-slave equipment transmission 1PPS+TOD signal respectively, by conversion relation, estimate the circuit delay between the master-slave equipment, the line build-out value that slave unit manually is set according to this time-delay compensates.But adopt this scheme, need the length of cable between the manual measurement master-slave equipment, and manually the value of compensating is provided with, the cost of labor height; And ignored different materials to the transmission influence, caused compensating error big.
Summary of the invention
In view of above problem, the embodiment of the invention has proposed a kind of methods, devices and systems of time bias, avoids manually being provided with cost height and the big problem of error.
A kind of method of time bias, described method comprises:
Main equipment sends 1 pulse per second (PPS) PPS and Time of Day TOD signal to slave unit,
At first 1s in the cycle, after receiving described slave unit feedback signal trailing edge, calculate described main equipment and send the pulse per second (PPS) trailing edge behind the time difference t of described main equipment receiving feedback signals trailing edge, draw circuit transmission delay time t ' according to t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge to main equipment after the expression slave unit received the PPS trailing edge;
In cycle, the described circuit transmission delay time t ' that described first 1s was generated in the cycle sends to described slave unit at second 1s; Make described slave unit carry out correction-compensation according to described delay data.
A kind of device of time bias, described device comprises:
The pulsing unit is used to send 1 pulse per second (PPS) PPS and Time of Day TOD signal to slave unit;
The feedback signal receiving element was used in the time period of described output high resistant signal, received the high level feedback signal of described slave unit output;
The delay time computing unit, be used to calculate described pulsing unit and send the pulse per second (PPS) trailing edge behind the time difference t of described feedback signal receiving element receiving feedback signals trailing edge, draw circuit transmission delay time t ' according to t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge after the described slave unit of expression received the PPS trailing edge;
The delay time signal transmitting element is used for that described circuit transmission delay time t ' is sent to described slave unit the time is carried out correction-compensation.
A kind of device of time bias, described device comprise,
The pulse per second (PPS) receiving element is used to receive 1 pulse per second (PPS) PPS and the Time of Day TOD signal that sends from main equipment;
The feedback signal transmitting element is used for after described pulse per second (PPS) receiving element receives the trailing edge of 1 pulse per second (PPS), output high level feedback signal;
The delay time signal receiving element is used to receive the circuit transmission delay time signal that sends from described main equipment;
Equipment time amending unit, the circuit transmission delay time signal that is used for receiving according to described delay time signal receiving element is carried out correction-compensation to the time.
A kind of system of time bias, described system comprises main equipment and slave unit,
Described main equipment sends to slave unit 1 pulse per second (PPS) PPS and Time of Day TOD signal; Described slave unit is exported the high level feedback signal behind the pulse per second (PPS) trailing edge that receives described main equipment transmission; Described main equipment calculates described pulsing unit and sends the pulse per second (PPS) trailing edge behind the time difference t of described feedback signal receiving element receiving feedback signals trailing edge, draw circuit transmission delay time t ' according to t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge to main equipment after the described slave unit of expression received described PPS trailing edge; And described circuit transmission delay time t ' is sent to described slave unit the time is carried out correction-compensation.
Utilize the scheme of the embodiment of the invention, not only guaranteed the precision in 1PPS+TOD transmission time, also realized the circuit delay of the slave unit transmission 1PPS+TOD time signal of advocating peace is detected and compensation automatically automatically, reduced cost of labor.
Description of drawings
Fig. 1 is a 1pps+TOD signal definition schematic diagram;
Fig. 2 is embodiment of the invention master-slave equipment PPS signal and feedback signal sequential chart;
Fig. 3 is embodiment of the invention master-slave equipment PPS signal and feedback signal sequential instantiation figure;
Fig. 4 is the structural representation of a kind of time bias equipment of the embodiment of the invention;
Fig. 5 is the structural representation of the another kind of time bias equipment of the embodiment of the invention;
Fig. 6 is the structural representation of a kind of time bias of embodiment of the invention system.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
In the embodiment of the invention, main equipment sends to slave unit 1PPS pulse per second (PPS) and TOD signal, after sending to the end of slave unit 1PPS pulse per second (PPS) high level, sends low level signal earlier and continues for some time back output high resistant signal; Concrete pulse and level signal are as shown in Figure 2, described main equipment output low level signal continues the t1 time (such as being 0.5ms), export the high resistant signal then and continue (t2-t1) time (such as being 9.5ms), wherein t2 time period scope can be that main equipment sends to slave unit 1PPS pulse per second (PPS) trailing edge to any time section between the next 1PPS pulse per second (PPS) rising edge.Slave unit is the t3 time (such as being 1ms) behind the pulse per second (PPS) trailing edge that receives the main equipment transmission, and output high level feedback signal continues output high level signal t4 time (such as being 0.5ms) and low level signal t5 time (such as being 0.5ms); T1≤t3＜t2 wherein, (t3+t4+t5)＜t2, promptly slave unit continues the output feedback signal high level and low level can be defined in the random time of main equipment output high resistant signal time section.After main equipment receives slave unit feedback signal trailing edge, the time difference t of trailing edge to main equipment receiving feedback signals trailing edge appears in the pulse per second (PPS) that calculates on the main equipment, calculate t-(t3+t4) again, half of described difference promptly sent to slave unit as the circuit transmission delay time time is carried out correction-compensation in [t-(t3+t4)]/2.Wherein under utmost point ideal situation, described (t3+t4) can be zero.
Wherein, above-mentioned 1PPS and TOD information transmit can adopt 422 level modes, physical connector adopts RJ45 or DB9, its electrical characteristic satisfies the respective standard requirement, when the slave unit of advocating peace is all exported the high resistant signal circuit can by utilize resistance pull down to negative power supply or on move cathode power supply to and keep low level.
1pps+TOD time signal transmission between the master-slave equipment as shown in Figure 3, comprising to carry out the step of time bias:
Step 302: main equipment sends 1PPS pulse per second (PPS) and TOD signal to slave unit,
Step 304: at first 1s in the cycle, after receiving described slave unit feedback signal trailing edge, calculate described main equipment and send the pulse per second (PPS) trailing edge behind the time difference t of described main equipment receiving feedback signals trailing edge, draw the circuit transmission delay time according to circuit transmission delay time t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge to main equipment after the expression slave unit received the PPS trailing edge;
Step 306: in the cycle, the described circuit transmission delay time t ' that described first 1s was generated in the cycle sends to described slave unit at second 1s; Make described slave unit carry out correction-compensation according to described delay data.
Described method further comprises step 303: described main equipment sends low level signal earlier and continues for some time back output high resistant signal after the high level that sends to slave unit 1 pulse per second (PPS) finishes; In the time period of described output high resistant signal, receive the high level feedback signal of slave unit output.
Also further comprise step 308a: at described second 1s in the cycle, also calculate described main equipment and send the pulse per second (PPS) trailing edge behind the time difference t of described main equipment receiving feedback signals trailing edge, draw the interior circuit transmission delay time in second 1s cycle according to circuit transmission delay time t '=(t-Δ t)/2;
Step 308b: at the 3rd 1s in the cycle, repeat the action in second 1s cycle, be that main equipment sends 1PPS pulse per second (PPS) and TOD signal, receive slave unit feedback signal trailing edge, also calculate the t ' in the 3rd 1s cycle, and the circuit transmission delay time t ' that the previous 1s cycle generates is sent to slave unit; Slave unit receives 1PPS pulse per second (PPS) and TOD signal, sends feedback signal toward main equipment, and delay data taking-up carrying out once more correction-compensation.
Comprise step 300 further, before cycle, main equipment specifically comprises to slave unit sending 1PPS pulse per second (PPS) and TOD signal with self supporting the ability notice slave unit of pulse per second (PPS) time synchronized at described first 1s, it is invalid that delay data is set, and also do not receive the slave unit feedback signal; Slave unit receives 1PPS pulse per second (PPS) and TOD signal, but does not send feedback signal toward main equipment.
Further, in the ideal case, Δ t can equal 0, and at this moment described main equipment is calculating main equipment transmission pulse per second (PPS) trailing edge after the time difference t of main equipment receiving feedback signals trailing edge, again with half of the difference that obtains as the circuit transmission delay time, i.e. t '=t/2.
All 1s after this repeat above-mentioned the 4th work of 1s in the cycle always in the cycle, realize the accurate correction-compensation to the signal transmission.
Come master-slave equipment 1pps+TOD time transfer process is described below in conjunction with an instantiation:
1, at first 1s in the cycle: main equipment sends 1PPS pulse per second (PPS) and TOD signal.It is invalid that delay data is set, and do not receive the trailing edge of slave unit feedback signal.It is that 3 bytes of 13～15 write bit23=0, bit22=1, bit21～bit0=0 that concrete operations comprise toward TOD load byte offsets.
Slave unit receives 1PPS pulse per second (PPS) and TOD signal, does not also send feedback signal toward main equipment.To the payload content byte offsets is that 3 bytes of 13～15 are resolved as follows: bit23 resolves to 0, prepares the next 1s cycle toward the slave unit feedback signal; Bit22 resolves to 1, does not handle delay data.This 1s is that main equipment will self be supported the ability notice slave unit of pulse per second (PPS) time synchronized in the cycle;
2, at second 1s in the cycle: main equipment sends 1PPS pulse per second (PPS) and TOD signal.TOD load byte offsets is that 3 bytes of 13～15 write bit23=0, bit22=1, bit21～bit0=0.Receive slave unit feedback signal trailing edge, calculate main equipment and send the time difference t of pulse per second (PPS) trailing edge to main equipment receiving feedback signals trailing edge, drawing the circuit transmission delay time is t/2;
If slave unit sends the feedback signal trailing edge to main equipment after receiving the 1.5ms that is set to delay time behind the PPS trailing edge, the then described circuit transmission delay time correspondingly is (t-1.5ms)/2, and hereinafter the scene with this hypothesis is described.
Slave unit receives 1PPS pulse per second (PPS) and TOD signal, sends feedback signal toward main equipment, and be that 3 bytes of 13～15 are resolved as follows to the payload content byte offsets: bit23 resolves to 0, prepares the next 1s cycle toward the slave unit feedback signal; Bit22 resolves to 1, does not handle delay data.
3, the 3rd 1s cycle: main equipment sends 1PPS pulse per second (PPS) and TOD signal.TOD load byte offsets is that 3 bytes of 13～15 write bit23=0, bit22=0, bit21～bit0=(t-1.5ms)/2.Receive slave unit feedback signal trailing edge, calculate main equipment and send the time difference t of pulse per second (PPS) trailing edge to main equipment receiving feedback signals trailing edge, drawing the circuit transmission delay time is (t-1.5ms)/2, and the circuit transmission delay time (t-1.5ms)/2 that the previous 1s cycle generates is sent to slave unit;
Slave unit receives 1PPS pulse per second (PPS) and TOD signal, sends feedback signal toward main equipment, and be that 3 bytes of 13～15 are resolved as follows to the payload content byte offsets: bit23 resolves to 0, prepares the next 1s cycle toward the slave unit feedback signal; Bit22 resolves to 0, bit21～bit0 delay data is taken out carry out correction-compensation.
4, the 4th 1s cycle, master-slave equipment is by the 3rd 1s cyclic flow work.
Main equipment can be that 3 reserve bytes of 13～15 come just that delay data sends to slave unit by TOD payload content byte offsets, and specifically utilizing which byte to transmit does not have substantive difference.To the payload content byte offsets is that 3 reserve bytes definition of 13～15 is as table 1.
Table 1TOD payload content byte offsets is 3 reserve bytes definition of 13～15
The embodiment of the invention also comprises a kind of equipment, and described equipment links to each other with slave unit, and as shown in Figure 4, described equipment comprises
The pulsing unit is used to send 1 pulse per second (PPS) PPS and Time of Day TOD signal to slave unit;
The feedback signal receiving element was used in the time period of described output high resistant signal, received the high level feedback signal of described slave unit output;
The delay time computing unit, be used to calculate described pulsing unit and send the pulse per second (PPS) trailing edge behind the time difference t of described feedback signal receiving element receiving feedback signals trailing edge, draw circuit transmission delay time t ' according to t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge after the described slave unit of expression received the PPS trailing edge;
The delay time signal transmitting element is used for that the described circuit transmission delay time is sent to described slave unit the time is carried out correction-compensation.
Described device further comprises, the level signal control unit is used for after the high level of 1 pulse per second (PPS) finishes, and sends earlier and exports the high resistant signal again after low level signal continues for some time.
Further, when Δ t=0, described device delay time computing unit sends the pulse per second (PPS) trailing edge after the time difference t of main equipment receiving feedback signals trailing edge calculating main equipment, again with half of the difference that obtains as the circuit transmission delay time, i.e. t '=t/2.
The embodiment of the invention also comprises another equipment, and described equipment links to each other with main equipment, and as shown in Figure 5, described equipment comprises
The pulse per second (PPS) receiving element is used to receive 1 pulse per second (PPS) PPS and the Time of Day TOD signal that sends from main equipment;
The feedback signal transmitting element is used for after described pulse per second (PPS) receiving element receives the trailing edge of 1 pulse per second (PPS), output high level feedback signal;
The delay time signal receiving element is used to receive the circuit transmission delay time signal that sends from described main equipment;
Equipment time amending unit, the circuit transmission delay time signal that is used for receiving according to described delay time signal receiving element is carried out correction-compensation to the time.
The embodiment of the invention also comprises a kind of system of time bias, and as shown in Figure 6, described system comprises main equipment and slave unit, and described main equipment sends to slave unit 1 pulse per second (PPS) PPS and Time of Day TOD signal; Described slave unit is exported the high level feedback signal behind the pulse per second (PPS) trailing edge that receives described main equipment transmission; Described main equipment calculates described pulsing unit and sends the pulse per second (PPS) trailing edge behind the time difference t of described feedback signal receiving element receiving feedback signals trailing edge, draw the circuit transmission delay time according to circuit transmission delay time t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge to main equipment after the described slave unit of expression received described PPS trailing edge; And the described circuit transmission delay time is sent to described slave unit the time is carried out correction-compensation.
Further, described main equipment is sent out and is adopted rising edge as punctual edge the 1PPS pulse per second (PPS).
Main equipment can with whether support the bit of automatic compensation function, delay data that main equipment sends whether effectively bit and delay data to be defined in TOD payload content byte offsets be that transmit any position of 4～7 and 13～15.Whether indication main equipment wherein supports whether effective bit can not define yet for the bit of automatic compensation function and the delay data of main equipment transmission, and the delay data that default master supports automatic compensation function and main equipment to send is effective.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. the method for a time bias is characterized in that, described method comprises:
Main equipment sends 1 pulse per second (PPS) PPS and Time of Day TOD signal to slave unit,
At first 1s in the cycle, after receiving described slave unit feedback signal trailing edge, calculate described main equipment and send the pulse per second (PPS) trailing edge behind the time difference t of described main equipment receiving feedback signals trailing edge, draw circuit transmission delay time t ' according to t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge to main equipment after the expression slave unit received the PPS trailing edge;
In cycle, the described circuit transmission delay time t ' that described first 1s was generated in the cycle sends to described slave unit at second 1s; Make described slave unit carry out correction-compensation according to described delay data.
2. method according to claim 1 is characterized in that, described method comprises that further described main equipment sends low level signal earlier and continues for some time back output high resistant signal after the high level that sends to slave unit 1 pulse per second (PPS) finishes; In the time period of described output high resistant signal, receive the high level feedback signal of slave unit output.
3. method according to claim 1, it is characterized in that, described method further comprises, at described second 1s in the cycle, also calculate the t ' in second 1s cycle, make described slave unit can carry out correction-compensation according to the t ' that calculates in the cycle at second 1s in the cycle at the 3rd 1s.
4. according to claim 1,2 or 3 described methods, it is characterized in that described method comprises that further before the cycle, main equipment will self be supported the ability notice slave unit of pulse per second (PPS) time synchronized at described first 1s.
5. according to claim 1,2 or 3 described methods, it is characterized in that described Δ t=0.
6. the device of a time bias is characterized in that, described device comprises:
The pulsing unit is used to send 1 pulse per second (PPS) PPS and Time of Day TOD signal to slave unit;
The feedback signal receiving element was used in the time period of described output high resistant signal, received the high level feedback signal of described slave unit output;
The delay time computing unit, be used to calculate described pulsing unit and send the pulse per second (PPS) trailing edge behind the time difference t of described feedback signal receiving element receiving feedback signals trailing edge, draw circuit transmission delay time t ' according to t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge after the described slave unit of expression received the PPS trailing edge;
The delay time signal transmitting element is used for that described circuit transmission delay time t ' is sent to described slave unit the time is carried out correction-compensation.
7. device according to claim 6 is characterized in that, described device further comprises,
The level signal control unit is used for after the high level of pulse per second (PPS) finishes, and sends earlier to export the high resistant signal again after low level signal continues for some time.
8. according to claim 6 or 7 described devices, it is characterized in that, when Δ t=0, described device delay time computing unit is calculating main equipment transmission pulse per second (PPS) trailing edge after the time difference t of main equipment receiving feedback signals trailing edge, again with half of the difference that obtains as the circuit transmission delay time, i.e. t '=t/2.
9. the device of a time bias is characterized in that, described device comprises,
The pulse per second (PPS) receiving element is used to receive 1 pulse per second (PPS) PPS and the Time of Day TOD signal that sends from main equipment;
The feedback signal transmitting element is used for after described pulse per second (PPS) receiving element receives the trailing edge of 1 pulse per second (PPS), output high level feedback signal;
The delay time signal receiving element is used to receive the circuit transmission delay time signal that sends from described main equipment;
Equipment time amending unit, the circuit transmission delay time signal that is used for receiving according to described delay time signal receiving element is carried out correction-compensation to the time.
10. the system of a time bias is characterized in that, described system comprises main equipment and slave unit,
Described main equipment sends to slave unit 1 pulse per second (PPS) PPS and Time of Day TOD signal;
Described slave unit is exported the high level feedback signal behind the pulse per second (PPS) trailing edge that receives described main equipment transmission;
Described main equipment calculates described pulsing unit and sends the pulse per second (PPS) trailing edge behind the time difference t of described feedback signal receiving element receiving feedback signals trailing edge, draw circuit transmission delay time t ' according to t '=(t-Δ t)/2, wherein Δ t is that time-delay Δ t sent the feedback signal trailing edge to main equipment after the described slave unit of expression received described PPS trailing edge; And described circuit transmission delay time t ' is sent to described slave unit the time is carried out correction-compensation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106145684A CN102082655A (en) | 2010-12-30 | 2010-12-30 | Time compensation method, device and system |
| PCT/CN2011/080097 WO2012088932A1 (en) | 2010-12-30 | 2011-09-23 | Method, device and system for time compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106145684A CN102082655A (en) | 2010-12-30 | 2010-12-30 | Time compensation method, device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102082655A true CN102082655A (en) | 2011-06-01 |
Family
ID=44088415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106145684A Pending CN102082655A (en) | 2010-12-30 | 2010-12-30 | Time compensation method, device and system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102082655A (en) |
| WO (1) | WO2012088932A1 (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012088932A1 (en) * | 2010-12-30 | 2012-07-05 | 华为技术有限公司 | Method, device and system for time compensation |
| CN103718499A (en) * | 2013-03-20 | 2014-04-09 | 华为技术有限公司 | Time compensation device and method of main equipment, time compensation device and method of slave equipment, and time compensation system |
| CN104597878A (en) * | 2014-12-31 | 2015-05-06 | 重庆川仪自动化股份有限公司 | Controller time synchronizing method of industrial control system |
| CN105510853A (en) * | 2015-11-24 | 2016-04-20 | 深圳怡化电脑股份有限公司 | Method and system for measuring time delay of magnetic sensor |
| CN107645768A (en) * | 2016-07-20 | 2018-01-30 | 工业和信息化部电信研究院 | A kind of method for synchronizing time and device for intra-office distribution |
| WO2018103391A1 (en) * | 2016-12-08 | 2018-06-14 | 郑州云海信息技术有限公司 | Clock skew correction method, device and system |
| CN108370549A (en) * | 2016-04-21 | 2018-08-03 | 华为技术有限公司 | A kind of synchronizing information is sent or method of reseptance, base station and communication node |
| CN109995604A (en) * | 2017-12-29 | 2019-07-09 | 华为技术有限公司 | A kind of flexible ethernet delay measurement method and relevant device |
| CN110928177A (en) * | 2019-11-14 | 2020-03-27 | 上海咏昕信息科技有限公司 | Clock synchronization system and method |
| CN111710354A (en) * | 2020-06-17 | 2020-09-25 | 湖南国科微电子股份有限公司 | CMD (cross-talk) delay compensation method, device, equipment and medium for DDR3 |
| WO2020248707A1 (en) * | 2019-06-14 | 2020-12-17 | 中兴通讯股份有限公司 | Time synchronization allocation input interface circuit and delay compensation method therefor |
| CN112202525A (en) * | 2020-10-29 | 2021-01-08 | 电信科学技术第五研究所有限公司 | PPS (pulse per second) delay automatic measurement and compensation method of multi-board card equipment |
| CN113110124A (en) * | 2021-03-11 | 2021-07-13 | 上海新时达电气股份有限公司 | double-MCU control method and control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090034672A1 (en) * | 2007-04-17 | 2009-02-05 | Jae-Hun Cho | Method and apparatus for time synchronization using gps information in communication system |
| CN101515831A (en) * | 2008-02-22 | 2009-08-26 | 杭州华三通信技术有限公司 | Method, system and device for time synchronous transfer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8055801B2 (en) * | 2006-09-15 | 2011-11-08 | International Business Machines Corporation | Pulse-per-second attachment for STP |
| CN101330374B (en) * | 2007-06-18 | 2012-11-14 | 大唐移动通信设备有限公司 | Method and system for synchronizing clock of transmission network as well as subordinate clock side entity |
| CN102082655A (en) * | 2010-12-30 | 2011-06-01 | 华为技术有限公司 | Time compensation method, device and system |
-
2010
- 2010-12-30 CN CN2010106145684A patent/CN102082655A/en active Pending
-
2011
- 2011-09-23 WO PCT/CN2011/080097 patent/WO2012088932A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090034672A1 (en) * | 2007-04-17 | 2009-02-05 | Jae-Hun Cho | Method and apparatus for time synchronization using gps information in communication system |
| CN101515831A (en) * | 2008-02-22 | 2009-08-26 | 杭州华三通信技术有限公司 | Method, system and device for time synchronous transfer |
Non-Patent Citations (2)
| Title |
|---|
| 《移动通信》 20090228 沈瑞武等 "基于PTN网的1588时间同步技术及应用研究" 第57页至第62页 , * |
| 沈瑞武等: ""基于PTN网的1588时间同步技术及应用研究"", 《移动通信》, 28 February 2009 (2009-02-28), pages 57 - 62 * |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012088932A1 (en) * | 2010-12-30 | 2012-07-05 | 华为技术有限公司 | Method, device and system for time compensation |
| CN103718499A (en) * | 2013-03-20 | 2014-04-09 | 华为技术有限公司 | Time compensation device and method of main equipment, time compensation device and method of slave equipment, and time compensation system |
| WO2014146267A1 (en) * | 2013-03-20 | 2014-09-25 | 华为技术有限公司 | Time compensation apparatus and method for master device, time compensation apparatus and method for slave device, and time compensation system |
| CN103718499B (en) * | 2013-03-20 | 2016-01-13 | 华为技术有限公司 | The time bias device and method of main equipment, from the time bias device and method of equipment and time bias system |
| CN104597878A (en) * | 2014-12-31 | 2015-05-06 | 重庆川仪自动化股份有限公司 | Controller time synchronizing method of industrial control system |
| CN105510853B (en) * | 2015-11-24 | 2018-12-11 | 深圳怡化电脑股份有限公司 | A kind of time-delay measuring method and system of magnetic sensor |
| CN105510853A (en) * | 2015-11-24 | 2016-04-20 | 深圳怡化电脑股份有限公司 | Method and system for measuring time delay of magnetic sensor |
| CN108370549A (en) * | 2016-04-21 | 2018-08-03 | 华为技术有限公司 | A kind of synchronizing information is sent or method of reseptance, base station and communication node |
| CN108370549B (en) * | 2016-04-21 | 2021-02-23 | 华为技术有限公司 | Synchronous information sending or receiving method, base station and communication node |
| US10638438B2 (en) | 2016-04-21 | 2020-04-28 | Huawei Technologies Co., Ltd. | Synchronization information sending method, synchronization information receiving method, base station, and communications node |
| CN107645768A (en) * | 2016-07-20 | 2018-01-30 | 工业和信息化部电信研究院 | A kind of method for synchronizing time and device for intra-office distribution |
| CN107645768B (en) * | 2016-07-20 | 2020-09-25 | 工业和信息化部电信研究院 | Time synchronization method and device for intra-office distribution |
| WO2018103391A1 (en) * | 2016-12-08 | 2018-06-14 | 郑州云海信息技术有限公司 | Clock skew correction method, device and system |
| US11199868B2 (en) | 2016-12-08 | 2021-12-14 | Zhengzhou Yunhai Information Technology Co., Ltd. | Clock skew correction method, device and system |
| CN109995604A (en) * | 2017-12-29 | 2019-07-09 | 华为技术有限公司 | A kind of flexible ethernet delay measurement method and relevant device |
| CN109995604B (en) * | 2017-12-29 | 2023-05-16 | 华为技术有限公司 | Flexible Ethernet time delay measurement method and related equipment |
| WO2020248707A1 (en) * | 2019-06-14 | 2020-12-17 | 中兴通讯股份有限公司 | Time synchronization allocation input interface circuit and delay compensation method therefor |
| CN110928177A (en) * | 2019-11-14 | 2020-03-27 | 上海咏昕信息科技有限公司 | Clock synchronization system and method |
| CN111710354A (en) * | 2020-06-17 | 2020-09-25 | 湖南国科微电子股份有限公司 | CMD (cross-talk) delay compensation method, device, equipment and medium for DDR3 |
| CN111710354B (en) * | 2020-06-17 | 2022-08-19 | 湖南国科微电子股份有限公司 | CMD (cross-talk) delay compensation method, device, equipment and medium for DDR3 |
| CN112202525A (en) * | 2020-10-29 | 2021-01-08 | 电信科学技术第五研究所有限公司 | PPS (pulse per second) delay automatic measurement and compensation method of multi-board card equipment |
| CN113110124A (en) * | 2021-03-11 | 2021-07-13 | 上海新时达电气股份有限公司 | double-MCU control method and control system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012088932A1 (en) | 2012-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102082655A (en) | Time compensation method, device and system | |
| JP2009290626A (en) | Optical transmission system and time reference pulse synchronizing method | |
| CN102843620B (en) | A kind of OTN Apparatus and method for realizing time synchronized and transmit | |
| CN101827098A (en) | Processing method and device for time synchronization | |
| CN101425865B (en) | Method and system for synchronizing clock of transmission network as well as subordinate clock side entity | |
| CN101478358A (en) | Method and device for optimized time synchronization correction | |
| CN102096372B (en) | Method for calibrating satellite system clock based on bus mode | |
| CN108880727B (en) | A kind of precision clock synchronization realizing method based on PTPd2 agreement | |
| CN101217330A (en) | A method and device for time synchronism calibration | |
| CN107786293A (en) | Method for synchronizing time, clock equipment, from clockwork and clock synchronization system | |
| CN105376043B (en) | A kind of method for synchronizing time of double board systems | |
| CN106688207A (en) | Method for determining a propagation time of a telegram in a communication network, and corresponding network components | |
| CN102917284A (en) | Precise clock synchronization method based on PON (Passive Optical Network) system | |
| CN109450583B (en) | High-precision network time synchronization method based on machine self-learning | |
| CN103199950B (en) | A kind of E1 of employing special line carries out the method for split-second precision transmission | |
| CN103178920A (en) | Multi-channel synchronization method in test system of digital transformer substation | |
| CN107645768B (en) | Time synchronization method and device for intra-office distribution | |
| CN104980244A (en) | Input line time-delay compensation apparatus and method of time synchronization equipment | |
| KR101176798B1 (en) | Method for clock synchronization between slave and master | |
| CN102571253B (en) | Method and equipment for implementing precise time synchronization | |
| RU172628U1 (en) | TIME SYNCHRONIZATION SERVER | |
| CN202772918U (en) | PTP signal protocol converting device | |
| CN204697070U (en) | Time signal generator and time tester | |
| CN102377502B (en) | Multilevel time synchronizing system and implementing method | |
| RU166018U1 (en) | WATCH SYNCHRONIZATION DEVICE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110601 |