CN116545568A - System and method for adding ultra-high precision time stamp of short wave signal - Google Patents
System and method for adding ultra-high precision time stamp of short wave signal Download PDFInfo
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- H—ELECTRICITY
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- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of time stamp addition, and provides an addition system and method of an ultra-high precision time stamp of a short wave signal, wherein the system comprises the following components: a master node; a number of slave nodes. The invention obtains the sending time T of the synchronous message through the message exchange of the synchronous message, the follow-up message, the delayed receiving message and the delayed replying message between the master node and the slave node 1 Obtaining the time T of receiving the synchronous message 2 Time T for transmitting delayed received message 3 And delay of the reception time T of the received message 4 The time difference between the master node and the slave node is determined, so that the clock of the target equipment is adjusted, a one-to-many time stamp adding mode is adopted, an independent clock generating device is not required to be set for the target equipment, the cost of hardware equipment is reduced, the later maintenance is convenient, and the transmission distance of the system is increased; meanwhile, the method has the advantages of small error, strong anti-interference capability and the like.
Description
Technical Field
The invention relates to the technical field of time stamp addition, in particular to a system and a method for adding an ultra-high precision time stamp of a short wave signal.
Background
In the application of short wave signal technology, time stamping plays an important role. In order to be able to record the reception time of the signal accurately, a time stamping technique is required. Recording the time of receipt of the short wave signal by the time stamp can help the receiver achieve a more accurate knowledge of the signal source and content, thereby providing advantages for subsequent signal analysis, processing and response. The time stamp is to embed the current time identifier into the received short wave signal, so as to accurately record the signal receiving time at the receiving end.
In the aviation and navigation fields, adding a time stamp to a short wave signal can help record information such as the position, speed, and navigation time of a ship or an airplane, so as to better realize navigation and flight control. For example, in the field of aviation, radar stations that direct aircraft typically transmit target tracking data to the aircraft in order for the aircraft to navigate to predetermined flight airports and target points. The radar station can add a time stamp to any target so as to record information such as tracking time, position and the like, which is helpful for an aircraft to grasp the current position and situation of the aircraft, adjust the flight direction and speed in time and ensure safe landing. The guidance system on the vessel may use satellite communications or other wireless power sources to receive navigational signals that send the current position, speed, direction of travel, etc. of the vessel to the on-board lead, with the latest time stamp. In case of emergency, if an offshore accident is encountered, by means of these records we can quickly dispatch rescue vessels to take rescue actions in time to ensure the life safety of crew.
In astronomical and meteorological fields, the application of adding time stamps to short wave signals is very widespread. Short wave signals can help scientists study and explore various phenomena in the earth and universe, such as detecting weather systems on the earth with short wave radar, or observing stars and planets in universe with short wave telescope, etc. In the research process, adding the time stamp can help scientists to accurately grasp information such as the state and the position of a research object, so that tracking and analysis of a certain phenomenon can be better realized. For example, in meteorology, the echo signals of short wave radar may help scientists analyze various weather patterns on earth, while adding a time stamp may help scientists better track the trend of changes in different weather phenomena for more accurate predictions and forecasts.
The prior art has a hard adding mode and a soft adding mode: (1) The hard adding mode generally refers to recording and adding a time stamp through special hardware equipment, such as a digital clock, a time delay measuring instrument or GPS equipment, and the like, wherein the hardware equipment can acquire the time stamp with high precision, can reach microsecond precision and even nanosecond precision generally, and has higher stability and reliability. (2) The soft adding mode is usually to record and add a time stamp in software through code logic, and the latest time stamp can be obtained through an internal clock of a computer system, so that the soft adding mode has the advantage of convenience in use and can be used in a wide application scene.
However, the hard addition method and the soft addition method of the prior art have the following problems and disadvantages:
(1) For the hard addition mode: the hardware equipment cost is high. Hardware devices to be time stamped need to have high precision and stability, which means that these devices are often costly. Hardware equipment is difficult to maintain. Hardware devices have a certain lifetime and vulnerability, and therefore require regular maintenance and inspection to ensure their continued high accuracy and stability. Hardware device transmission distance limitations. In some application scenarios, timestamp addition requires transmission between devices at a long distance, which is often limited by the transmission distance of the hardware devices, in which case appropriate means need to be taken for transmission expansion.
(2) For the soft addition mode: the source error is large. Soft-add methods typically use the internal clock of the computer system to obtain time, in a relatively low accuracy manner, with some error in the time stamp, and in extreme cases may even be on the order of tens of milliseconds. Is susceptible to interference. The accuracy of the time stamp can also be affected by the external environment in which the computer system is located and the operating conditions of the operating system. For example, differences in timestamps may result in different operating systems or versions.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a system and a method for adding an ultra-high precision timestamp of a short wave signal, which aim to solve the problems and the defects of the existing timestamp adding mode.
In a first aspect of the present invention, there is provided a system for adding an ultra-high precision time stamp to a short wave signal, the system comprising:
a master node;
a plurality of slave nodes;
the master node is used for sending a synchronous message and a follow-up message to the target slave node, and sending a delay reply message to the target slave node when receiving a delay receiving message sent by the target slave node;
wherein the follow-up message includes a transmission time T of the synchronous message 1 The delayed reply message includes a time T of receipt of the delayed receipt message 4 ；
The slave node is used for sending a delay receiving message to the master node and receiving a delay reply message sent by the master node;
wherein the slave node is used for sending time T according to the synchronous message 1 Obtaining the time T of receiving the synchronous message 2 Time T for transmitting delayed received message 3 And delay of the reception time T of the received message 4 And determining the time difference between the master node and the slave node, and performing clock adjustment on the target equipment.
Optionally, the master node and the plurality of slave nodes are connected by adopting optical fiber communication.
Optionally, the master node has:
a clock reference source;
a master switch;
wherein the clock reference source outputs a reference clock signal;
wherein the master switch obtains a transmission time T according to a reference clock signal 1 And a reception time T 4 。
Optionally, the clock reference source employs GPS timing.
Optionally, the master switch has:
a synchronous message transmitting unit;
a follow-up message transmission unit;
wherein the synchronous message transmitting unit transmits synchronous message to target slave node and obtains transmission time T for transmitting synchronous message to slave node 1 ；
Wherein the follow-up message sending unit sends the follow-up message according to the sending time T 1 And generating a follow-up message and sending the follow-up message to the target slave node.
Optionally, the master switch further has:
a delayed receipt message receiving module;
a delayed reply message sending module;
wherein the delayed reception message receiving module receives a delayed reception message sent by a target slave node and obtains a reception time T for receiving the delayed reception message 4 ；
Wherein the delayed reply message sending module sends a delayed reply message according to the receiving time T 4 A delayed reply message is generated and sent to the target slave node.
Optionally, the system further has:
a plurality of switching nodes;
wherein the switching node is configured as a secondary switch connecting the master node and the slave node;
the auxiliary exchanger is used for exchanging synchronous messages, follow-up messages, delayed receiving messages and delayed replying messages between the main node and the auxiliary node.
Optionally, the slave node has:
a synchronous message receiving module;
a follow message receiving module;
a delayed receipt message sending module;
a delayed reply message receiving module;
wherein, the synchronous message receiving module receives the synchronous message sent by the master node and obtains the receiving time T for receiving the synchronous message 2 ；
Wherein, the following message receiving module receives the following message sent by the master node, and obtains the sending time T of the synchronous message sent by the master node to the slave node 1 ；
Wherein the delayed reception message sending module generates a delayed reception message and sends the delayed reception message to the master node to obtain a sending time T for sending the delayed reception message 3 ；
Wherein, the delayed reply message receiving module receives the delayed reply message sent by the master node and obtains the receiving time T in the received delayed reply message 4 。
Optionally, the slave node further has:
a time difference determining module;
a clock adjustment module;
wherein the time difference determining module determines the time difference according to the transmission time T obtained from the node 1 Time of reception T 2 Time of transmission T 3 And a reception time T 4 Determining a time difference between the master node and the target slave node;
the clock adjustment module performs first time synchronization between the target slave node and the master node and second time synchronization between the target equipment and the target slave node according to the time difference between the master node and the target slave node.
Optionally, determining a time difference between the master node and the target slave node, specifically:
wherein off isset ns Delay is the time difference between the master node and the target slave node ns Is the link delay between the master node and the target slave node.
Optionally, the slave node further has:
a clock data recovery module;
a phase detection module;
a phase correction module;
the clock data recovery module acquires a data recovery clock in a message transmitted from a master node to a slave node;
the phase detection module detects the phase difference between the data recovery clock and the slave node clock;
the phase correction module performs first phase correction on the slave node clock according to the phase difference and performs second phase correction on the target device.
Optionally, the system adopts a WRPTP protocol compatible with ptp_v2 protocol to realize the steps of synchronizing messages, follow-up messages, delayed receiving messages, delayed replying messages, clock adjustment, phase correction and the like between the master node and the slave node.
The invention provides a method for adding an ultra-high precision timestamp of a short wave signal, which comprises the following steps:
s1: the master node sends a synchronous message to the target slave node to acquire a sending time T 1 And transmitting a message including the transmission time T to the target slave node 1 Is a follow-up message of (1);
s2: the target slave node obtains the sending time T in the received follow-up message 1 And a reception time T for receiving the synchronization message 2 ；
S3: the target slave node sends a delay receiving message to the master node, and obtains the sending time T of the delay receiving message 3 ；
S4: the master node obtains the receiving time T of the received delayed message 4 And transmitting to the target slave node a message including the time T 4 Is a delayed reply message;
s5: target slaveThe node obtains the receiving time T in the received delay reply message 4 ；
S6: the target slave node according to the transmission time T 1 Time of reception T 2 Time of transmission T 3 And a reception time T 4 And determining the time difference between the master node and the slave node, and performing clock adjustment on the target equipment according to the time difference.
The invention has the beneficial effects that: the system and the method for adding the ultra-high precision timestamp of the short wave signal are provided, and the sending time T of the synchronous message is obtained through the message exchange of the synchronous message, the follow-up message, the delayed receiving message and the delayed replying message between the master node and the slave node 1 Obtaining the time T of receiving the synchronous message 2 Time T for transmitting delayed received message 3 And delay of the reception time T of the received message 4 The time difference between the master node and the slave node is determined, so that the clock adjustment is carried out on the target equipment, a one-to-many time stamp adding mode is adopted, an independent clock generating device is not required to be set up for the target equipment, the cost of hardware equipment is reduced, the later maintenance is convenient, the transmission distance of the system is improved, the error is small, and the anti-interference capability is strong.
Drawings
Fig. 1 is a schematic diagram of a system for adding ultra-high precision time stamps to short wave signals according to the present invention;
fig. 2 is a schematic diagram of two structures of an adding system for ultra-high precision time stamping of a short wave signal according to the present invention;
fig. 3 is a schematic flow chart of a method for adding ultra-high precision time stamps in short wave signals.
Reference numerals:
10-master node; 20-slave node; 30-target device; 40-switching node.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
referring to fig. 1, fig. 1 is a schematic structural diagram of an adding system for ultra-high precision time stamps of short wave signals according to an embodiment of the present invention.
As shown in fig. 1, a system for adding a short wave signal ultra-high precision time stamp includes: a master node 10 and several slave nodes 20.
It should be noted that, the master node 10 is clock reference source equipment in the process of adding a timestamp, and the equipment provides a time reference for the whole system; slave node 20 is a device for calibrating target device 30, typically a target device 30CPU; the target device 30 is a calibrated device, which may be single or plural, and the target device 30 may be placed in a dispersed manner.
In some embodiments, the master node 10 and the plurality of slave nodes 20 are connected using fiber optic communications. Therefore, the clock loop between the master node 10 and the plurality of slave nodes 20 and the target equipment 30 can be established through the optical fiber transmission link, and the high-precision time synchronization of the master node 20 and the slave node 20 can be completed based on the PTP_v2 protocol and the clock data fusion technology.
In this embodiment, all target devices 30 are connected together through optical fibers, and all target devices 30 use the time reference source of the master node 10 as a reference, i.e. one to many, without setting up a separate clock generating device for the target devices 30, on the basis of reducing the cost of hardware devices, the remote time synchronization can be supported through the optical fiber transmission link, and the limitation of the transmission distance of the hardware devices is solved.
The master node 10 is configured to send a synchronization message and a follow-up message to the target slave node 20, and send a delayed reply message to the target slave node 20 when receiving a delayed receipt message sent by the target slave node 20; the follow-up message includes a transmission time T of the synchronous message 1 The delayed reply message includes a time T of receipt of the delayed receipt message 4 。
Wherein, the slave node 20 is configured to send a delayed receipt message to the master node 10, and receive a delayed reply message sent by the master node 10; the slave node 20 is configured to send a synchronization message according to a transmission time T 1 Obtaining the time T of receiving the synchronous message 2 Time T for transmitting delayed received message 3 And delay of the reception time T of the received message 4 The time difference between the master node 10 and the slave node 20 is determined and the target device 30 is clocked.
In this embodiment, the master node 10 and the slave node 20 adjust the time difference between the master node 10 and the slave node 20 and between the slave node 20 and the target device 30 by measuring the round trip delay, so as to realize clock adjustment for the target device 30. Specifically, the transmission time T of the synchronization message to the slave node 20 by the master node 10 1 Time T at which slave node 20 receives the synchronization message of master node 10 2 Time T for transmitting a delayed reception message from the slave node 20 to the master node 10 3 And a reception time T at which the master node 10 receives the delayed reception message 4 To determine the time difference between the master node 10 and the slave node 20. Based on the time difference determining principle, the present embodiment can implement one-to-many time stamp addition, i.e., a time synchronization process, between one master node 10 and a plurality of slave nodes 20, and by taking all devices as a reference, the clock standard is unified, and the possibility of being interfered is reduced.
Example 2:
in a preferred embodiment, the master node 10 has: a clock reference source and a master switch.
The clock reference source outputs a reference clock signal; the master switch obtains the transmission time T according to the reference clock signal 1 And a reception time T 4 。
The master node 10 has a clock reference source and a master switch, wherein the clock reference source is used for providing time reference for the whole system, i.e. all devices in the system take the clock of the clock reference source as reference, so that the clock standard can be unified; in practical application, the clock referenceThe source may employ GPS timing. The master switch is used for obtaining the transmission time T according to the reference clock signal output by the clock reference source 1 And a reception time T 2 And letting the target slave node 20 aggregate the transmission time T by message exchange between the master node 10 and the slave node 20 1 Time of reception T 2 Time of transmission T 3 And a reception time T 4 To determine the time difference between the master node 10 and the slave node 20, clock adjustment is implemented.
In this embodiment, the clock reference source provides the reference clock signal of the whole system, which unifies the clock standard of the whole system, and simultaneously, the master switch cooperates with the master switch to send out the transmission time T meeting the clock standard to the corresponding target slave node 20 1 And a reception time T 4 Based on the transmission time T meeting the clock standard sent by the master node 10 1 And a reception time T 4 And a reception time T sent from the node 20 that does not meet the clock criterion 2 And a transmission time T 3 And (3) realizing accurate calculation of time difference based on round trip delay principle.
As shown in fig. 2, in a preferred embodiment, the system further has: a number of switching nodes 40.
The switching node 40 is configured as a secondary switch that connects the master node 10 and the slave node 20; the secondary switch is used for message exchange of synchronization messages, follow-up messages, delayed receipt messages and delayed reply messages between the master node 10 and the slave node 20.
In this embodiment, a clock loop is established among the master node 10, the plurality of switching nodes 40, the plurality of slave nodes 20 and the target device 30 through the optical fiber transmission link, so that an adding system of ultra-high precision time stamps of short wave signals with longer transmission distance can be realized. Meanwhile, in practical application, the master node 10 and the plurality of switching nodes 40 can be managed in a centralized manner, and since other devices belong to the calibrated objects, only the master node 10 and the switching nodes 40 are maintained, and the one-to-many and centralized management mode is more convenient for later maintenance.
Example 3:
in a preferred embodiment, the master switch has: a synchronous message sending unit and a follow-up message sending unit.
The synchronization message transmitting unit transmits a synchronization message to the target slave node 20 and obtains a transmission time T for transmitting the synchronization message to the slave node 20 1 The method comprises the steps of carrying out a first treatment on the surface of the The follow-up message sending unit sends the follow-up message according to the sending time T 1 A follow-up message is generated and sent to the target slave node 20.
In this embodiment, when performing the calculation of the time difference based on the round trip delay principle, the master node 10 with clock standard needs to send the synchronization message to the target slave node 20, and the target slave node 20 needs to know not only the time of receiving the synchronization message but also the time of sending the synchronization message by the master node 10, so that the master node 10 needs to send the synchronization message immediately after sending the synchronization message, including the transmission time T of the synchronization message 1 Is a follow-up message of (a).
Thus, by the two messages sent by the master node 10 to the slave node 20 in sequence, a first one-way delay calculation is constructed, the delay being calculated from the transmission time T satisfying the clock criterion 1 And a reception time T not meeting the clock standard 2 And (5) calculating to obtain the product.
In a preferred embodiment, the master switch further has: the delayed receipt message receiving module and the delayed reply message sending module.
The delayed reception message receiving module receives a delayed reception message sent by the target slave node 20 and obtains a reception time T for receiving the delayed reception message 4 The method comprises the steps of carrying out a first treatment on the surface of the The delayed reply message sending module sends the delayed reply message according to the receiving time T 4 A delayed reply message is generated and sent to the target slave node 20.
In this embodiment, when performing the time difference calculation based on the round trip delay principle, after constructing the delay calculation in the first single direction, it is also necessary to transmit a delay reception message to the master node 10 through the target slave node 20 and transmit a delay reply message to the target slave node 20 through the master node 10, so as to construct the delay calculation in the second single direction. The round trip delay constituted in both directions is used to calculate the time difference between the determination master node 10 and the slave node 20.
Example 4:
in a preferred embodiment, the slave node 20 has: the system comprises a synchronous message receiving module, a following message receiving module, a delayed receiving message sending module and a delayed replying message receiving module.
It should be noted that, the synchronization message receiving module receives the synchronization message sent by the master node 10, and obtains a receiving time T for receiving the synchronization message 2 The method comprises the steps of carrying out a first treatment on the surface of the The following message receiving module receives the following message sent by the master node 10, and obtains the sending time T of the master node 10 sending the synchronous message to the slave node 20 1 The method comprises the steps of carrying out a first treatment on the surface of the The delayed reception message transmitting module generates a delayed reception message and transmits the delayed reception message to the master node 10 to obtain a transmission time T for transmitting the delayed reception message 3 The method comprises the steps of carrying out a first treatment on the surface of the The delayed reply message receiving module receives the delayed reply message sent by the master node 10 and obtains the receiving time T in the received delayed reply message 4 。
In the present embodiment, since the slave node 20 is the subject of performing the clock adjustment, the delay calculation between the master node 10 and the slave node 20 requires time information (i.e., transmission time T) of two delay calculations 1 Time of reception T 2 Time of transmission T 3 Time of reception T 4 ) Summarized to slave node 20. Wherein the transmission time T 1 Receiving time T by transmitting a follow-up message to slave node 20 along with a synchronization message 4 The time when the delayed receipt message is received is transmitted as a delayed reply message by the master node 10 to the slave node 20. Thus, at the slave node 20, the transmission time T can be used 1 Time of reception T 2 Time of transmission T 3 Time of reception T 4 And (5) performing time difference determination.
In a preferred embodiment, the slave node 20 further has: the time difference determining module and the clock adjusting module.
The time difference determining module is used for determining the time difference according to the slave node20 obtained transmission time T 1 Time of reception T 2 Time of transmission T 3 And a reception time T 4 Determining a time difference between the master node 10 and the target slave node 20;
specifically, the time difference between the master node 10 and the target slave node 20 is determined, specifically:
wherein, the offset ns Delay is the time difference between the master node 10 and the target slave node 20 ns Is the link delay between the master node 10 and the target slave node 20.
The clock adjustment module performs a first time synchronization between the target slave node 20 and the master node 10 and a second time synchronization between the target device 30 and the target slave node 20 according to a time difference between the master node 10 and the target slave node 20.
In the present embodiment, the slave node 20 transmits a signal according to the transmission time T 1 Time of reception T 2 Time of transmission T 3 Time of reception T 4 After determining the time difference, the slave node 20 needs to adjust its own clock first by using the time difference, and after ensuring that the own clock is consistent with the clock of the master node 10 clock reference source, the target device 30 is adjusted in a manner that the clock time of the target device 30 is adjusted to the clock time of the slave node 20.
Example 5:
in a preferred embodiment, the slave node 20 further has: the device comprises a clock data recovery module, a phase detection module and a phase correction module.
It should be noted that, the clock data recovery module acquires the data recovery clock in the message transmitted from the master node 10 to the slave node 20; the phase detection module detects the phase difference between the data recovery clock and the slave node 20 clock; the phase correction module performs a first phase correction on the slave node 20 clock and a second phase correction on the target device 30 based on the phase difference.
In this embodiment, in addition to the clock adjustment of the target device 30, phase synchronization of the target device 30 is also included. In the short wave signal ultra-high precision time stamp adding system, clocks of all modules in the system independently run, all the modules form a clock network topology, and each module is regarded as a node in the topology.
On this basis, the slave node 20 may recover a clock from a data link between the master node 10 and the slave node 20 by using a clock data recovery technique (CDR) through a set clock data recovery module, to obtain a data recovery clock. After that, the phase detector is used to measure the phase difference between the data recovery clock and the local clock and correct the time stamp, thereby ensuring that the clock frequencies of all nodes of the entire network are consistent with the master node 10, achieving time phase synchronization of the entire system.
In some embodiments, jitter caused by a clock recovery circuit in the phase-locked loop inside the node can be filtered by configuring an error filter circuit, so as to further improve clock synchronization accuracy.
In some embodiments, in the system of the multi-layer structure, the obtained data recovery clock is not only the clock of the slave node 20, but also the reference clock of the slave node in the next layer structure, so that clock synchronization and phase synchronization under the multi-layer structure are realized.
In practical application, the system adopts a WRPTP protocol compatible with a PTP_v2 protocol to realize the message exchange of synchronous messages, follow-up messages, delayed receiving messages and delayed replying messages between the master node 10 and the slave node 20, thereby realizing ultra-high-precision clock adjustment and phase correction and solving the problem of source errors.
In another preferred embodiment, to guarantee high accuracy requirements of the target device 30 timestamp, the master node 10 and the slave node 20 may be utilized for clock adjustment and phase correction at certain time intervals (based on the clock reference source of the master node 10). Therefore, after different base stations or devices receive the short wave signals, the calibrated local clock is used for stamping the short wave signals, and the time scales of all the devices can be kept consistent due to the fact that the reference WR clock reference source module is calibrated, and the accuracy can reach nanoseconds.
The embodiment provides a system and a method for adding a short wave signal ultra-high precision time stamp, which acquire the sending time T of a synchronous message through the message exchange of the synchronous message, a follow-up message, a delayed receiving message and a delayed reply message between a master node and a slave node 1 Obtaining the time T of receiving the synchronous message 2 Time T for transmitting delayed received message 3 And delay of the reception time T of the received message 4 The time difference between the master node and the slave node is determined, so that the clock adjustment is carried out on the target equipment, a one-to-many time stamp adding mode is adopted, an independent clock generating device is not required to be set up for the target equipment, the cost of hardware equipment is reduced, the later maintenance is convenient, the transmission distance of the system is improved, the error is small, and the anti-interference capability is strong.
Example 6:
referring to fig. 3, fig. 3 is a flow chart of a method for adding an ultra-high precision timestamp of a short wave signal according to an embodiment of the present invention.
As shown in fig. 3, the method for adding the ultra-high precision timestamp of the short wave signal comprises the following steps:
s1: the master node sends a synchronous message to the target slave node to acquire a sending time T 1 And transmitting a message including the transmission time T to the target slave node 1 Is a follow-up message of (1);
s2: the target slave node obtains the sending time T in the received follow-up message 1 And a reception time T for receiving the synchronization message 2 ；
S3: the target slave node sends a delay receiving message to the master node, and obtains the sending time T of the delay receiving message 3 ；
S4: the master node obtains the receiving time T of the received delayed message 4 And transmitting to the target slave node a message including the time T 4 Is delayed back toA complex message;
s5: the target slave node obtains the time T of reception in the received delayed reply message 4 ；
S6: the target slave node according to the transmission time T 1 Time of reception T 2 Time of transmission T 3 And a reception time T 4 And determining the time difference between the master node and the slave node, and performing clock adjustment on the target equipment according to the time difference.
The specific implementation manner of the short-wave signal ultra-high precision time stamp adding method is basically the same as that of each embodiment of the short-wave signal ultra-high precision time stamp adding system, and is not repeated here.
In describing embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "inner", "outer", "inside", "outside", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Wherein "inside" refers to an interior or enclosed area or space. "peripheral" refers to the area surrounding a particular component or region.
In the description of embodiments of the present invention, the terms "first," "second," "third," "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third" and a fourth "may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In describing embodiments of the present invention, it should be noted that the terms "mounted," "connected," and "assembled" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, unless otherwise specifically indicated and defined; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of embodiments of the invention, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
In the description of the embodiments of the present invention, it is to be understood that "-" and "-" denote the same ranges of the two values, and the ranges include the endpoints. For example: "A-B" means a range greater than or equal to A and less than or equal to B. "A-B" means a range of greater than or equal to A and less than or equal to B.
In the description of embodiments of the present invention, the term "and/or" is merely an association relationship describing an association object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An addition system for ultra-high precision time stamps of short wave signals, said system comprising:
a master node;
a plurality of slave nodes;
the master node is used for sending a synchronous message and a follow-up message to the target slave node, and sending a delay reply message to the target slave node when receiving a delay receiving message sent by the target slave node;
wherein the follow-up message includes a transmission time T of the synchronous message 1 The delayed reply message includes a time T of receipt of the delayed receipt message 4 ；
The slave node is used for sending a delay receiving message to the master node and receiving a delay reply message sent by the master node;
wherein the slave node is used for sending time T according to the synchronous message 1 Obtaining the time T of receiving the synchronous message 2 Time T for transmitting delayed received message 3 And delay of the reception time T of the received message 4 And determining the time difference between the master node and the slave node, and performing clock adjustment on the target equipment.
2. The short wave signal ultra-high precision time stamp adding system of claim 1, wherein the master node has:
a clock reference source;
a master switch;
wherein the clock reference source outputs a reference clock signal;
wherein the master switch obtains a transmission time T according to a reference clock signal 1 And a reception time T 4 。
3. The short wave signal ultra-high precision time stamp adding system according to claim 2, wherein the master switch has:
a synchronous message transmitting unit;
a follow-up message transmission unit;
wherein the synchronous message transmitting unit transmits synchronous message to target slave node and obtains transmission time T for transmitting synchronous message to slave node 1 ；
Wherein the follow-up message sending unit sends the follow-up message according to the sending time T 1 And generating a follow-up message and sending the follow-up message to the target slave node.
4. The short wave signal ultra-high precision time stamp adding system according to claim 2, wherein the master switch further has:
a delayed receipt message receiving module;
a delayed reply message sending module;
wherein the delayed reception message receiving module receives a delayed reception message sent by a target slave node and obtains a reception time T for receiving the delayed reception message 4 ；
Wherein the delayed reply message sending module sends a delayed reply message according to the receiving time T 4 A delayed reply message is generated and sent to the target slave node.
5. The short wave signal ultra-high precision time stamp adding system of claim 1, further comprising:
a plurality of switching nodes;
wherein the switching node is configured as a secondary switch connecting the master node and the slave node;
the auxiliary exchanger is used for exchanging synchronous messages, follow-up messages, delayed receiving messages and delayed replying messages between the main node and the auxiliary node.
6. The short wave signal ultra-high precision time stamp adding system according to claim 1, wherein the slave node has:
a synchronous message receiving module;
a follow message receiving module;
a delayed receipt message sending module;
a delayed reply message receiving module;
wherein, the synchronous message receiving module receives the synchronous message sent by the master node and obtains the receiving time T for receiving the synchronous message 2 ；
Wherein the following message receiving module receives the following sent by the master nodeEntering a message to obtain the transmission time T of the synchronous message transmitted by the master node to the slave node 1 ；
Wherein the delayed reception message sending module generates a delayed reception message and sends the delayed reception message to the master node to obtain a sending time T for sending the delayed reception message 3 ；
Wherein, the delayed reply message receiving module receives the delayed reply message sent by the master node and obtains the receiving time T in the received delayed reply message 4 。
7. The short wave signal ultra-high precision time stamp adding system according to claim 1, wherein the slave node further has:
a time difference determining module;
a clock adjustment module;
wherein the time difference determining module determines the time difference according to the transmission time T obtained from the node 1 Time of reception T 2 Time of transmission T 3 And a reception time T 4 Determining a time difference between the master node and the target slave node;
the clock adjustment module performs first time synchronization between the target slave node and the master node and second time synchronization between the target equipment and the target slave node according to the time difference between the master node and the target slave node.
8. The short wave signal ultra-high precision time stamp adding system according to claim 1, wherein the time difference between the master node and the target slave node is determined by:
wherein o isffset ns Delay is the time difference between the master node and the target slave node ns Is the link delay between the master node and the target slave node.
9. The short wave signal ultra-high precision time stamp adding system according to claim 1, wherein the slave node further has:
a clock data recovery module;
a phase detection module;
a phase correction module;
the clock data recovery module acquires a data recovery clock in a message transmitted from a master node to a slave node;
the phase detection module detects the phase difference between the data recovery clock and the slave node clock;
the phase correction module performs first phase correction on the slave node clock according to the phase difference and performs second phase correction on the target device.
10. The method for adding the ultra-high precision time stamp of the short wave signal is characterized by comprising the following steps of:
s1: the master node sends a synchronous message to the target slave node to acquire a sending time T 1 And transmitting a message including the transmission time T to the target slave node 1 Is a follow-up message of (1);
s2: the target slave node obtains the sending time T in the received follow-up message 1 And a reception time T for receiving the synchronization message 2 ；
S3: the target slave node sends a delay receiving message to the master node, and obtains the sending time T of the delay receiving message 3 ；
S4: the master node obtains the receiving time T of the received delayed message 4 And transmitting to the target slave node a message including the time T 4 Is a delayed reply message;
s5: the target slave node obtains the time T of reception in the received delayed reply message 4 ；
S6: target slaveThe node is based on the transmission time T 1 Time of reception T 2 Time of transmission T 3 And a reception time T 4 And determining the time difference between the master node and the slave node, and performing clock adjustment on the target equipment according to the time difference.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117422556A (en) * | 2023-12-14 | 2024-01-19 | 中信证券股份有限公司 | Derivative transaction system, device and computer medium based on replication state machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117422556A (en) * | 2023-12-14 | 2024-01-19 | 中信证券股份有限公司 | Derivative transaction system, device and computer medium based on replication state machine |
| CN117422556B (en) * | 2023-12-14 | 2024-04-12 | 中信证券股份有限公司 | Derivative transaction system, device and computer medium based on replication state machine |
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