CN112187392A - Operating system for converting time signal into E1 communication time service - Google Patents
Operating system for converting time signal into E1 communication time service Download PDFInfo
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- CN112187392A CN112187392A CN202011045124.3A CN202011045124A CN112187392A CN 112187392 A CN112187392 A CN 112187392A CN 202011045124 A CN202011045124 A CN 202011045124A CN 112187392 A CN112187392 A CN 112187392A
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- 238000012545 processing Methods 0.000 claims abstract description 14
- 239000013078 crystal Substances 0.000 claims abstract description 11
- 108700009949 PTP protocol Proteins 0.000 claims description 18
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
- H04J3/0623—Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process
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- 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
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
- G04R20/04—Tuning or receiving; Circuits therefor
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- 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
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
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Abstract
The invention discloses an operating system for converting a time signal into E1 communication time service, and relates to the technical field of communication. The IRIG-B code time source is transmitted to the signal analysis module through a bus, the signal analysis module analyzes a time information message and a pulse per second and transmits the time information message and the pulse per second to the core processor through the bus, the core processor transmits the time information message and the pulse per second to the phase-locked loop precision tracking measurement module through a time source selection algorithm and carries out local voltage control crystal oscillator control through the bus, carries out time continuity processing according to the time information service processing module and transmits the time information message and the pulse per second to the time information service output module through the bus to output time service data; the existing optical cable channel resources are fully utilized, and the optical cable channel resources are installed at time-use nodes such as central nodes at all levels, communication rooms and secondary nodes, so that unified standard time service can be provided.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an operating system for converting a time signal into E1 communication time service.
Background
With the rapid development of smart power grids, the requirement of the power grids on time synchronization is higher and higher, the time used by most substations and stations of a power system is provided by independent system internal clocks, and due to the difference and difference of the respective internal clocks, a large time deviation occurs between the systems after the systems operate for a long time, so that huge hidden dangers are brought to the safe operation and production of the power system.
The SDH optical communication network has a set of standardized information structure grades, a time slot is appointed in a 2.048Mbits branch in a service channel to transmit a time signal, voice or data service of other time slots is not influenced, and the existing SDH equipment is not required to be modified, so that the practicability is strong, but the jitter, pointer adjustment and the like of an E1 part at two ends of a transmission link have large influence on the time delay of data transmission and great technical difficulty because the transmission rate of E1 is 2 Mbits/s.
Disclosure of Invention
In view of the deficiencies of the prior art, the present invention provides an operating system for converting a time signal into an E1 communication time service, so as to solve the problems mentioned in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: an operating system for converting time signals into E1 communication time service comprises an IRIG-B code time source, a signal analysis module, a core processor, a phase-locked loop tracking measurement module, a time-frequency information processing module, a time-frequency service output module and a monitoring center, wherein the IRIG-B code time source is transmitted to the signal analysis module through a bus, the signal analysis module analyzes a time information message and a pulse per second and transmits the time information message and the pulse per second to the core processor through the bus, the core processor transmits the time information message and the pulse per second to the phase-locked loop precision tracking measurement module through a time source selection algorithm to control a local voltage-controlled crystal oscillator, performs time continuity processing according to the time-frequency information service processing module, transmits time service output data to the time-frequency information service output module through the bus and transmits the time service output data to the monitoring center through an.
Further optimizing the technical scheme, the signal analysis module comprises ethernet/E1 protocol conversion, PTP interaction timestamp acquisition, path delay measurement calculation, path delay filtering, and time offset adjustment, and is configured to analyze two paths of IRIG-B code signals input from the outside to obtain time information and pulse-per-second signals.
Further optimizing the technical scheme, the phase-locked loop tracking and measuring module comprises a phase detector, a loop filter, a high-stability constant-temperature crystal oscillator and a frequency divider, and is used for realizing the phase-locked tracking of the local clock to an external clock source.
Further optimizing the technical scheme, the phase-locked loop tracking measurement module performs phase discrimination on clock source second pulse and output clock frequency division signals, and controls the high-stability constant-temperature crystal to perform phase-locked tracking after loop filtering.
Further optimizing the technical scheme, the time-frequency information processing module comprises time continuous judgment and output continuous time, and is used for monitoring a reference time source and judging the continuity of time.
Further optimizing the technical scheme, if the time continuous judgment is in the discontinuous condition, the continuity of the output time is ensured by a source switching or local clock compensation method according to a time continuity algorithm.
Further optimizing the technical scheme, the time-frequency service output module comprises a PTP protocol processing engine, NTP output and E1 link processing, and is used for completing E1 signal conversion, PTP protocol exchange and algorithm and NTP time service output functions.
In the time-frequency service output module, a PTP protocol engine processor is connected with a timestamp control module through a bus, a second pulse and time information generated by a local clock are output to the PTP protocol engine processor and the timestamp control module through a communication bus, the PTP protocol engine processor is responsible for analyzing a time message, comparing the time in the timestamp control module with the deviation of the local clock, and correcting the time of the timestamp control module.
In the time-frequency service output module, the data transmission rate of the E1 optical cable channel is in accordance with the G.703 protocol, the data transmission rate is 2.048Mbps, the timestamp control module outputs a message in accordance with the Ethernet protocol, the data transmission rate is 100Mbps, the E1 format and the Ethernet data format are mutually converted, and the data transmission rate needs to be adapted.
Compared with the prior art, the invention provides an operating system for converting a time signal into E1 communication time service, which has the following beneficial effects:
1. the operating system for converting the time signal into the E1 communication time service is a high-precision optical cable time service system based on an SDH optical cable E1 channel, adopts an advanced high-precision time synchronization technology, can be installed and used on any node of an optical cable network, and has the advantages of high time synchronization precision, low manufacturing cost, convenience in use and the like.
2. The time signal is converted into an operating system for E1 communication time service, and meanwhile, the time deviation of the time service terminal relative to the main clock can be compared in real time by using the same special E1 channel, and the deviation value is sent back to the monitoring center, so that the functions of dynamic monitoring, alarm display and the like of the time deviation of each command post are realized.
3. The time signal is converted into an E1 communication time service operating system, the existing optical cable channel resources are fully utilized, and the operating system is installed on time service nodes such as various levels of central nodes, communication rooms and secondary nodes, so that unified standard time service can be provided.
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FIG. 1 is a schematic diagram of a control system of an operating system for converting a time signal into an E1 communication time service according to the present invention;
FIG. 2 is a signal analysis block diagram of a signal analysis module of an operating system for converting a time signal into E1 communication time service according to the present invention;
FIG. 3 is a block diagram of a PLL tracking measurement module of an operating system for converting a time signal into an E1 communication time service according to the present invention;
FIG. 4 is a block diagram of a time-frequency information processing module of an operating system for converting a time signal into E1 communication time service according to the present invention;
fig. 5 is a time-frequency information service output block diagram of a time-frequency service output module of an operating system for converting a time signal into E1 communication time service according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the system comprises an IRIG-B code time source, a signal analysis module, a core processor, a pll tracking measurement module, a time-frequency information processing module, a time-frequency service output module, and a monitoring center, and a high-precision optical cable time service system based on an SDH optical cable E1 channel, which can be installed and used on any node of an optical cable network by using an advanced high-precision time synchronization technology, and has the advantages of high time synchronization precision, low cost, and convenient use, wherein the IRIG-B code time source is transmitted to the signal analysis module through a bus, the signal analysis module analyzes a time information message and a second pulse signal, and transmits the time information message and the second pulse signal to the core processor through the bus, the core processor transmits the time information message to the pll tracking measurement module through a time source selection algorithm, performs local voltage-controlled crystal oscillation control, and performs time continuity processing according to the time-frequency information service processing module, meanwhile, the time deviation of the time service terminal relative to the main clock can be compared in real time by using the same special E1 channel, and the deviation value is sent back to the monitoring center, so that the functions of dynamic monitoring, alarm display and the like of the time deviation of each level of command post are realized, time service output data are transmitted to the time-frequency information service output module through the bus and are transmitted to the monitoring center through the optical cable, the existing optical cable channel resources are fully utilized, and the time service system is installed at time service nodes such as each level of central nodes, a communication machine room and a second level node, and can provide uniform standard time service.
As a specific optimization scheme of this embodiment, the signal analysis module includes ethernet/E1 protocol conversion, PTP interaction timestamp acquisition, path delay measurement calculation, path delay filtering, and time offset adjustment, and is configured to analyze two externally input IRIG-B code signals to obtain time information and a pulse per second signal, the signal analysis module analyzes two externally input IRIG-B code signals to obtain time information and a pulse per second signal, and transmits the time information and the pulse per second signal to the core processor through the bus, and the core processor selects one of the two time sources as a reference of the local clock according to a time source selection algorithm for subsequent processing.
As a specific optimization scheme of this embodiment, the phase-locked loop tracking measurement module includes a phase detector, a loop filter, a high-stability constant-temperature crystal oscillator, and a frequency divider, and is configured to implement phase-locked tracking of a local clock to an external clock source, and obtain stable and accurate time information by precise frequency control and crystal oscillator voltage control taming.
As a specific optimization scheme of this embodiment, the phase-locked loop tracking measurement module performs phase discrimination on the clock source pulse per second and the output clock frequency division signal, and controls the high-stability constant-temperature crystal to perform phase-locked tracking after loop filtering.
As a specific optimization scheme of this embodiment, the time-frequency information processing module includes time continuous determination and output continuous time, and is configured to monitor a reference time source and determine time continuity.
As a specific optimization scheme of this embodiment, if the time continuity determination is performed when the discontinuity occurs, the continuity of the output time is ensured by a method of source switching or local clock compensation according to a time continuity algorithm.
As a specific optimization scheme of this embodiment, the time-frequency service output module includes a PTP protocol processing engine, an NTP output, and an E1 link process, and is configured to complete E1 signal conversion, PTP protocol exchange and algorithm, and an NTP time service output function, where the module outputs a PTP time service packet, and converts the PTP message into data in an E1 format through the signal conversion module, and transmits the data through an optical cable.
As a specific optimization scheme of this embodiment, in the time-frequency service output module, a PTP protocol engine processor is connected to a timestamp control module through a bus, a second pulse and time information generated by a local clock are output to the PTP protocol engine processor and the timestamp control module through a communication bus, the PTP protocol engine processor is responsible for analyzing a time packet, comparing a deviation between a time in the timestamp control module and the local clock, and correcting a time of the timestamp control module to make the time consistent with a local time height, and in a PTP protocol interaction packet process, all packets fill a time scale field in a packet through the timestamp control module, so that it can be ensured that a time scale in the PTP protocol packet is consistent with the local time height.
As a specific optimization scheme of this embodiment, in the time-frequency service output module, data transmitted by an E1 optical cable channel conforms to a g.703 protocol, a data transmission rate is 2.048Mbps, a timestamp control module outputs a message conforming to an ethernet protocol, a data transmission rate is 100Mbps, a format E1 is adapted to a data format of the ethernet and a data transmission rate, and since delay jitter is generated during protocol conversion, time consumed by conversion is recorded and filled in a correction domain of a PTP protocol message to calculate a path delay and a time deviation, so as to ensure system timing accuracy.
The invention has the beneficial effects that: the device can support the input of 1 path of optical fiber and 1 path of RS422 IRIG-B code and output of 10 paths of E1 signals, adopts an advanced high-precision time synchronization technology, can be installed and used on any node of an optical cable network, and has the advantages of high time synchronization precision, low manufacturing cost, convenience in use and the like; meanwhile, the time deviation of the time service terminal relative to the main clock can be compared in real time by using the same special E1 channel, and the deviation value is sent back to the monitoring center, so that the functions of dynamic monitoring, alarm display and the like of the time deviation of each command post are realized; the existing optical cable channel resources are fully utilized, and the optical cable channel resources are installed at time-use nodes such as central nodes at all levels, communication rooms and secondary nodes, so that unified standard time service can be provided.
The related modules involved in the system are all hardware system modules or functional modules combining computer software programs or protocols with hardware in the prior art, and the computer software programs or the protocols involved in the functional modules are all known in the technology of persons skilled in the art, and are not improvements of the system; the improvement of the system is the interaction relation or the connection relation among all the modules, namely the integral structure of the system is improved, so as to solve the corresponding technical problems to be solved by the system.
It should be noted that, in the embodiment of the above search apparatus, each included unit and module are merely divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It should be noted that the foregoing is only a preferred embodiment of the invention and the technical principles employed, and those skilled in the art will understand that the invention is not limited to the specific embodiments described herein, and that various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. An operating system for converting time signals into E1 communication time service comprises an IRIG-B code time source, a signal analysis module, a core processor, a phase-locked loop tracking measurement module, a time-frequency information processing module, a time-frequency service output module and a monitoring center, and is characterized in that the IRIG-B code time source is transmitted to the signal analysis module through a bus, the signal analysis module analyzes a time information message and a second pulse signal and transmits the time information message and the second pulse signal to the core processor through the bus, the core processor transmits the time information message and the second pulse signal to the phase-locked loop precision tracking measurement module through a time source selection algorithm through the bus to perform local voltage control crystal oscillator control, performs time continuity processing according to the time-frequency information service processing module, transmits time service output data to the time-frequency information service output module through the bus, and transmits the time service output data to the monitoring.
2. The operating system for converting a time signal into an E1 communication service according to claim 1, wherein the signal analyzing module includes ethernet/E1 protocol conversion, PTP interaction timestamp acquisition, path delay measurement calculation, path delay filtering, and time offset adjustment, and is configured to analyze two IRIG-B code signals input from outside to obtain time information and a pulse-per-second signal.
3. The operating system for converting a time signal into an E1 communication time service according to claim 1, wherein the phase-locked loop tracking measurement module comprises a phase detector, a loop filter, a high-stability constant-temperature crystal oscillator, and a frequency divider, and is configured to perform phase-locked tracking of a local clock to an external clock source.
4. The operating system for converting a time signal into an E1 communication time service according to claim 3, wherein the PLL tracking measurement module performs phase discrimination on clock source pulse per second and an output clock frequency division signal, and controls a high-stability constant temperature crystal to perform phase-locked tracking after loop filtering.
5. The operating system of claim 1, wherein the time information processing module comprises a time-continuous determining and outputting continuous time for monitoring a reference time source and determining the time continuity.
6. The operating system for converting a time signal into an E1 communication service according to claim 5, wherein if the time continuity determination is performed, the continuity of the output time is ensured by a method of source switching or local clock compensation according to a time continuity algorithm.
7. The operating system for converting time signals into E1 communication time service according to claim 1, wherein the time-frequency service output module comprises a PTP protocol processing engine, NTP output and E1 link processing for completing E1 signal conversion, PTP protocol exchange and algorithm and NTP time service output function.
8. The operating system for converting a time signal into E1 communication time service according to claim 7, wherein in the time-frequency service output module, the PTP protocol engine processor is connected to the timestamp control module via a bus, the second pulse and the time information generated by the local clock are output to the PTP protocol engine processor and the timestamp control module via a communication bus, and the PTP protocol engine processor is responsible for analyzing the time packet, comparing the time in the timestamp control module with the deviation of the local clock, and correcting the time of the timestamp control module.
9. The operating system for converting a time signal into E1 communication service according to claim 7, wherein in the time-frequency service output module, the E1 optical cable channel transmits data according to the g.703 protocol, the data transmission rate is 2.048Mbps, the timestamp control module outputs a message according to the ethernet protocol, the data transmission rate is 100Mbps, and the E1 format is adapted to the ethernet data format for mutual conversion and data transmission rate.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114257556A (en) * | 2021-12-21 | 2022-03-29 | 四川灵通电讯有限公司 | Multi-access information processing device and communication method |
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|---|---|---|---|---|
| CN202475441U (en) * | 2012-03-21 | 2012-10-03 | 许文 | Power system time synchronization device based on precision time protocol |
| CN105553593A (en) * | 2015-12-10 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | SDH (Synchronous Digital Hierarchy)-based multi-time source PTP (Precision Time Protocol) data synchronization and time monitoring system |
| CN110928176A (en) * | 2019-11-21 | 2020-03-27 | 北京计算机技术及应用研究所 | Multifunctional time service equipment supporting multiple time service technologies |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202475441U (en) * | 2012-03-21 | 2012-10-03 | 许文 | Power system time synchronization device based on precision time protocol |
| CN105553593A (en) * | 2015-12-10 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | SDH (Synchronous Digital Hierarchy)-based multi-time source PTP (Precision Time Protocol) data synchronization and time monitoring system |
| CN110928176A (en) * | 2019-11-21 | 2020-03-27 | 北京计算机技术及应用研究所 | Multifunctional time service equipment supporting multiple time service technologies |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114257556A (en) * | 2021-12-21 | 2022-03-29 | 四川灵通电讯有限公司 | Multi-access information processing device and communication method |
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