CN110138487A - A kind of temporal noise transmission characteristic measurement method and network node - Google Patents
A kind of temporal noise transmission characteristic measurement method and network node Download PDFInfo
- Publication number
- CN110138487A CN110138487A CN201810133981.5A CN201810133981A CN110138487A CN 110138487 A CN110138487 A CN 110138487A CN 201810133981 A CN201810133981 A CN 201810133981A CN 110138487 A CN110138487 A CN 110138487A
- Authority
- CN
- China
- Prior art keywords
- noise
- clock signal
- network node
- message
- lock cell
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 24
- 238000000691 measurement method Methods 0.000 title claims abstract description 20
- 230000002123 temporal effect Effects 0.000 title claims abstract description 14
- 230000001360 synchronised effect Effects 0.000 claims abstract description 13
- 238000004891 communication Methods 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 27
- 230000015654 memory Effects 0.000 claims description 19
- 238000001914 filtration Methods 0.000 claims description 9
- 230000008901 benefit Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000004590 computer program Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 241000208340 Araliaceae Species 0.000 description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 235000008434 ginseng Nutrition 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 108700009949 PTP protocol Proteins 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- H04J3/0638—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
-
- 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
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/067—Details of the timestamp structure
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Electric Clocks (AREA)
Abstract
The embodiment of the invention discloses a kind of temporal noise transmission characteristic measurement method and network nodes, which comprises obtains reference clock signal；The message of other network nodes transmission is obtained, noise is generated and noise is added to the original time stamp of the message, the clock of other network nodes is synchronized according to the timestamp after superimposed noise, obtains the recovered clock signal for carrying noise；Noise, which is obtained, according to reference clock signal and recovered clock signal transmits information.The embodiment of the present invention passes through in locally generated noise, and noise is added in the original time stamp of received master network node message, then the recovered clock signal for carrying noise is obtained according to the clock of the synchronous master network node of timestamp by distorting, and lock clock source signals and obtain reference clock signal, the transmitting information of the i.e. noise of gain of the noise is obtained according to reference clock signal and recovered clock signal.It does not need using external expensive measuring instrument come the transmission characteristic of time of measuring noise, cost is relatively low.
Description
Technical field
The present embodiments relate to network communication technology field, in particular to a kind of temporal noise transmission characteristic measurement method
And network node.
Background technique
In a communication network, perhaps multiple services normal operation requires that network clocking is synchronous, i.e., each equipment of whole network it
Between time or difference on the frequency be maintained in reasonable error level.Precision Time Protocol (Precision Time Protocol,
PTP) be a kind of time synchronization agreement, the precise synchronization being used between equipment.To the biography of noise in communication system
Stringent limitation is passed, each network node in communication system requires to be filtered noise.And PTP is as communication system
The noise characteristic of the important component of system, output time also has strict demand.Currently, being using special apparatus measures
The transmission characteristic of PTP noise, but instrument price is expensive, higher cost.
Summary of the invention
The purpose of the embodiment of the present invention is that provide a kind of lower temporal noise transmission characteristic measurement method of measurement cost and
Network node.
In a first aspect, it is used for network node the embodiment of the invention provides a kind of temporal noise transmission characteristic measurement method,
The network node is connect with other at least one network node communications, and the network node is used as from network node, the side
Method includes:
Reference clock signal is obtained, the reference clock signal is obtained by locking clock source signals；
Obtain other network nodes transmission message, generate noise and by the noise be added to the message it is original when
Between stab, the clock of other network nodes is synchronized according to the timestamp after superimposed noise, obtains the recovery for carrying noise
Clock signal, other described network nodes also lock the clock source signals；
Other described network nodes are obtained according to the reference clock signal and the recovered clock signal for carrying noise
Noise between the network node transmits information.
Optionally, it is described according to the reference clock signal and the recovered clock signal for carrying noise obtain it is described its
Noise between his network node and the network node transmits information, comprising:
Obtain the time difference of the reference clock signal and the recovered clock signal for carrying noise；
Sampling obtains multiple time differences, obtains difference curve according to multiple time differences；
The peak value for obtaining the difference curve, obtains the noise according to the peak value and raw noise and transmits information.
It is optionally, described that the noise is added to the original time stamp of the message, comprising:
Noise phase corresponding value when receiving the message is added to the original time stamp of the message.
Optionally, the timestamp according to after superimposed noise synchronizes the clock of other network nodes, obtains
Carry the recovered clock signal of noise, comprising:
The clock of other network nodes is synchronized according to the timestamp after superimposed noise, and the clock of acquisition is believed
It number is filtered, obtains the recovered clock signal for carrying noise；
The method also includes:
Display device is sent by noise transmitting information, so that the display device shows the noise transmitting letter
Breath；
And/or
According to the parameter of filtering described in noise transmitting Information revision.
Second aspect, the embodiment of the invention provides a kind of network node, the network node includes:
Transceiver communication device, the transceiver communication device is used to receive clock source signals, and sends and receivees message；
First lock cell, first lock cell and the transceiver communication device are electrically connected, for locking clock
Source signal obtains reference clock signal；
Noise generator, for generating noise；
Second lock cell, second lock cell are electric with the transceiver communication device and the noise generator respectively
Property connection, the message sent for obtaining received other network nodes of the transceiver communication device, by the noise generator
The noise of generation is added to the original time stamp of the message, and according to the timestamp after superimposed noise synchronize it is described other
The clock of network node, obtains recovered clock signal, other described network nodes also lock the clock source signals；
Time comparing unit, the time comparing unit and first lock cell and second lock cell are distinguished
It is electrically connected, for obtaining the time difference of the reference clock signal and the recovered clock signal；
Controller, the controller and the time comparing unit are electrically connected, for adopting to the time difference
Sample, and the transmitting information of the noise between the network node and other described network nodes is obtained according to each sampled value.
Optionally, the network node further includes filter, and the filter is electrically connected at second lock cell
Between the time comparing unit, the filter is used to filter the noise in the recovered clock signal, the controller
It is also electrically connected with the filter, the controller is also used to the ginseng of the filter according to noise transmitting Information revision
Number.
Optionally, the controller is also communicated to connect with display device, so that the display device shows that the noise passes
Pass information.
Optionally, the clock source signals are GPS clock signal；
First lock cell is phase-locked loop circuit；
The time comparing unit is comparator.
The third aspect, the embodiment of the invention provides a kind of network node, the network node includes:
Transceiver communication device, the transceiver communication device is used to receive clock source signals, and sends and receivees message；
First lock cell, first lock cell and the transceiver communication device are electrically connected, for locking clock
Source signal obtains reference clock signal；
Controller is electrically connected with the transceiver communication device and first lock cell respectively；
The controller includes:
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
A processor executes, so that at least one described processor is able to carry out above-mentioned method.
Fourth aspect, the embodiment of the invention provides a kind of non-volatile computer readable storage medium storing program for executing, the computers
Readable storage medium storing program for executing is stored with computer executable instructions, when the computer executable instructions are executed by network node, makes
The network node executes above-mentioned method.
5th aspect, the embodiment of the invention provides a kind of computer program product, the computer program product includes
The computer program being stored on non-volatile computer readable storage medium storing program for executing, the computer program include program instruction, when
When described program instruction is executed by network node, the network node is made to execute method described in first aspect.
The beneficial effect of the embodiment of the present invention is: the embodiment of the present invention by from the locally generated noise of network node, and
The noise is added in the original time stamp of received master network node message, it is then same according to the timestamp by distorting
The clock for walking master network node obtains the recovered clock signal for carrying noise.It locks clock source signals and obtains reference clock signal,
Because same clock source signals should be based on from network node and master network node, when according to reference clock signal and restoring
The gain i.e. master network node that clock signal can be obtained the noise transmits information to from the noise of network node.It does not need using outer
The measuring instrument of portion's valuableness carrys out the transmission characteristic of time of measuring noise, and cost is relatively low.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the application scenarios schematic diagram of measurement method provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of one embodiment of measurement method of the present invention；
Fig. 3 is the flow diagram of one embodiment of measurement method of the present invention；
Fig. 4 is the hardware structural diagram of network node provided in an embodiment of the present invention；
Fig. 5 is the hardware structural diagram of network node provided in an embodiment of the present invention；
Fig. 6 is the hardware structural diagram of network node provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Temporal noise transmission characteristic measurement method provided in an embodiment of the present invention can be used for PTP temporal noise transmission characteristic
Measurement, suitable for application scenarios as shown in Figure 1.The application scenarios include multiple network nodes 10 and reference clock source
20, the clock source signals that each network node 10 locks the sending of reference clock source 20 (such as pass through phase lock loop locks clock source
Signal), wherein such as global positioning system of reference clock source 20 (Global Positioning System, GPS) clock source,
Beidou satellite navigation system clock source etc..
Each network node 10 can be used as PTP master network node, for issuing synchronization time, can also be used as PTP from
Network node, for receiving synchronization time.PTP master network node and PTP are based on same reference clock source from network node
20.PTP obtains reference clock signal, another party from the network node clock source signals that on the one hand locking reference clock source 20 issues
Face is added to the original time of received master network node message from the locally generated noise of network node, and by the noise
Stamp, when then obtaining the recovery for carrying noise according to the clock of the synchronous PTP master network node of the timestamp after superimposed noise
Clock signal, the reference clock signal and the recovered clock signal for carrying noise, can obtain the increasing of temporal noise
Benefit is the transmitting information of PTP master network node and PTP from temporal noise between network node.
Fig. 2 is the flow diagram of temporal noise transmission characteristic measurement method of the present invention, and the method can be by appointing in Fig. 1
One network node 10 executes, at this point, network node 10 is used as from network node, as shown in Figure 2, which comprises
101: obtaining reference clock signal, the reference clock signal is obtained by locking clock source signals.
Wherein it is possible to which the first lock cell is arranged on network node 10, pass through the first locking unit locks reference clock
The clock source signals that source 20 issues obtain reference clock signal, the first lock cell such as phase-locked loop circuit.
102: obtaining the message of other network nodes transmission, generate noise and the noise is added to the original of the message
Beginning timestamp synchronizes the clock of other network nodes according to the timestamp after superimposed noise, obtains and carry noise
Recovered clock signal, other described network nodes also lock the clock source signals.
Wherein, the method for obtaining recovered clock signal is the prior art, can use the request-reply machine based on PTP protocol
System holds delay strategy to obtain, and illustrates how the original of message that noise is added to by taking request-reply mechanism as an example below
Timestamp.
Master network node sends Sync message to from network node, and records sending time t1；This is received from network node
After message, receiving time t2 is recorded.After master network node sends Sync message, the Follow_Up message for carrying t1 is sent.From
Network node sends Delay_Req message to master network node, and records sending time t3；Master network node receives the message
Afterwards, receiving time t4 is recorded.After master network node receives Delay_Req message, the Delay_ for carrying t4 is replied
Resp message.At this point, having tetra- timestamps of t1-t4 from network node, major network can be calculated by four timestamps
Network node and from round-trip total delay [(t2-t1)+(t4-t3)] between network node, it is assumed that network be it is symmetrical, then from network section
The time deviation of point and master network node is [(t2-t1)+(t4-t3)]/2, it is possible thereby to obtain the extensive of synchronous master network node
Multiple clock.
According to whether sending Follow_Up message, request-reply mechanism is divided into single-step mode and two-step mode again,
Under single-step mode, the sending time stamp t1 of Sync message is carried by Sync message oneself, Follow_Up message is not sent, double
Under step mode, the sending time stamp t1 of Sync message is carried by Follow_Up message.
By taking single-step mode as an example, on the timestamp t1 or t2 of the Sync message that this Earth noise can be added to, specifically,
From network node after receiving Sync message, this Earth noise can be extracted with suitable sample rate (how need to meet Si Tedinglv)
The corresponding value of current phase, and the value is added on t1 or t2.It in other embodiments, can also be by locally generated noise
It is added on t3 or t4.
Carrying can be obtained using the method for above-mentioned acquisition recovered clock signal according to the timestamp after superimposed noise
The recovered clock signal of noise, optionally, the recovered clock signal for carrying noise can be filtered with further progress, to letter
Noise in number is filtered.
103: other described networks are obtained according to the reference clock signal and the recovered clock signal for carrying noise
Noise between node and the network node transmits information.
Since the reference clock signal and the recovered clock signal for carrying noise are based on same clock source signals, than
The reference clock signal and the recovered clock signal for carrying noise can be obtained the transmission characteristic of the noise.Specifically
, the time difference of the reference clock signal and the recovered clock signal for carrying noise can be first obtained, then to each
A time difference is sampled, and time difference curve is obtained.The peak value for obtaining the time difference curve, by the peak value and original
Beginning noise is compared the gain i.e. noise transmitting information that can be obtained the noise.
The embodiment of the present invention is added to received major network by from the locally generated noise of network node, and by the noise
In the original time stamp of network node message, then carried according to the clock of the synchronous master network node of timestamp by distorting
The recovered clock signal of noise.It locks clock source signals and obtains reference clock signal, because should be from network node and master network section
Point is based on same clock source signals, therefore can be obtained the gain of the noise according to reference clock signal and recovered clock signal
I.e. master network node transmits information to from the noise of network node.It does not need using external expensive measuring instrument come time of measuring
The transmission characteristic of noise, cost is relatively low.And noise is generated by the way of software, noise type is not limited by instrument, can be with mould
Intend a variety of different noises.
Further, after obtaining the noise transmitting information, it can also show that the noise transmits information, to provide ginseng
It examines, alternatively, directly transmitting the parameter that Information revision filters recovered clock signal according to the noise.It can also both show the noise
Information is transmitted, and corrects filtering parameter simultaneously.Referring to figure 3., in some embodiments of the method, the method in addition to
101, except 102 and 103, further includes:
104: display device is sent by noise transmitting information, so that the display device shows the noise transmitting
Information.
Wherein, display device can be personal computer, communicating terminal etc..
105: according to the parameter of filtering described in noise transmitting Information revision.
Information revision filtering parameter is transmitted according to the noise, so that the filtering algorithm can preferably filter out recovered clock
Noise in signal.In the prior art, it is measured using transmission characteristic of the special instrument to temporal noise, measurement result exists
Measurement end cannot directly be utilized by each PTP network node.The noise transmitting information that the embodiment of the present invention obtains can be with real-time delivery
To PTP from network node, so as to form closed-loop control so as to directly correct the filtering parameter of measurand from network node.
The embodiment of the invention also provides a kind of network nodes, as shown in figure 4, network node 10 is filled including transceiver communication
The 11, first lock cell 12 and controller 13 are set, transceiver communication device 11 and the first lock cell 12 are electrically connected, controller
13 are electrically connected with transceiver communication device 11 and the first lock cell 12 respectively.Transceiver communication device 11 is for receiving reference clock
The clock source signals that source 20 issues, and message is sended and received, the first lock cell 12 is obtained for locking clock source signals
Reference clock signal.Controller 13 is used to control transceiver communication device 11 and receives the message that other network nodes are sent, in local
It generates noise and noise is added to the original time stamp of the message, other networks are synchronized according to the timestamp after superimposed noise
The clock of node obtains the recovered clock signal for carrying noise, and controller is also used to obtain reference clock signal, and according to reference
Clock signal and the recovered clock signal for carrying noise obtain the transmitting information of temporal noise.
Specifically, controller 13 includes:
One or more processors 131 and memory 132, in Fig. 4 by taking a processor 131 as an example.Processor 131
It can be connected by bus or other modes with memory 132.
Memory 132 is used as a kind of non-volatile computer readable storage medium storing program for executing, can be used for storing non-volatile software journey
Sequence, non-volatile computer executable program and module, as the corresponding program instruction of measurement method in the embodiment of the present application/
Module.Non-volatile software program, instruction and the module that processor 131 is stored in memory 132 by operation, to hold
The various function application and data processing of row network node realize the measurement method of above method embodiment.
Memory 132 may include storing program area and storage data area, wherein storing program area can store operation system
Application program required for system, at least one function；Storage data area, which can be stored, uses created number according to network node
According to etc..In addition, memory 132 may include high-speed random access memory, it can also include nonvolatile memory, such as extremely
A few disk memory, flush memory device or other non-volatile solid state memory parts.In some embodiments, memory
132 it is optional include the memory remotely located relative to processor 131, these remote memories can pass through network connection to institute
State network node.The example of above-mentioned network include but is not limited to internet, intranet, local area network, mobile radio communication and its
Combination.
One or more of program modules are stored in the memory 132, when by one or more of places
When managing the execution of device 131, the measurement method in above-mentioned any means embodiment is executed, for example, executing the side in Fig. 1 described above
Method and step 101 in method step 101-103, Fig. 3 is to step 105.
The embodiment of the present invention is added to received major network by from the locally generated noise of network node, and by the noise
In the original time stamp of network node message, then carried according to the clock of the synchronous master network node of timestamp by distorting
The recovered clock signal of noise.It locks clock source signals and obtains reference clock signal, because should be from network node and master network section
Point is based on same clock source signals, therefore can be obtained the gain of the noise according to reference clock signal and recovered clock signal
I.e. master network node transmits information to from the noise of network node.It does not need using external expensive measuring instrument come time of measuring
The transmission characteristic of noise, cost is relatively low.
Measurement method provided by the embodiment of the present application can be performed in above-mentioned network node, has the corresponding function of execution method
Module and beneficial effect.The not technical detail of detailed description in the present embodiment, reference can be made to side provided by the embodiment of the present application
Method.
In above embodiments, noise transmitting letter is obtained according to reference clock signal and the recovered clock signal for carrying noise
Breath realizes that above-mentioned function can also be realized by hardware approach using the method for software program, and Fig. 5 is that the present invention is implemented
The structural schematic diagram for another network node that example provides, as shown in figure 5, the network node 10 includes:
Transceiver communication device 11, the first lock cell 12, the second lock cell 14, noise generator 16, time are more single
Member 15 and controller 13, transceiver communication device 11 are electrically connected with the first lock cell 12 and the second lock cell 14 respectively, make an uproar
Acoustic generator 16 and the second lock cell 14 are electrically connected, the first lock cell 12 and the second lock cell 14 also respectively with the time
Comparing unit 15 is electrically connected, and time comparing unit 15 and controller 13 are electrically connected.
Transceiver communication device 11 is used to receive the clock source signals of the transmission of reference clock source 20, and sends and receivees report
Text, the first lock cell 12 obtain reference clock signal, noise generator 16 is made an uproar for generating for locking clock source signals
Sound, the second lock cell 14 are used to control transceiver communication device 11 and receive the message that other network nodes are sent, noise is occurred
The noise that device 16 generates is added to the original time stamp of the message, and is synchronized according to the timestamp after superimposed noise described
The clock of other network nodes obtains recovered clock signal.Specifically, the noise is added to the original time of the message
Stab the original time stamp for the message that noise phase corresponding value when receiving the message can be added to.
Time comparing unit 15 is used to obtain the time difference of the reference clock signal and the recovered clock signal.Control
Device 13 processed obtains the network node and other described networks for sampling to the time difference, and according to each sampled value
Noise between node transmits information.Specifically, controller 13 samples each time difference, time difference curve is obtained.
The peak value is compared with raw noise and obtains the gain of the noise and make an uproar by the peak value for obtaining the time difference curve
Sound transmission information.
Wherein, the first lock cell 12 can use phase-locked loop circuit, and time comparing unit 15 can use comparator, the
Two lock cells 14 can use MCU using the processor with certain processing capacity, controller 13.
The embodiment of the present invention is added to received major network by from the locally generated noise of network node, and by the noise
In the original time stamp of network node message, then carried according to the clock of the synchronous master network node of timestamp by distorting
The recovered clock signal of noise.It locks clock source signals and obtains reference clock signal, because should be from network node and master network section
Point is based on same clock source signals, therefore can be obtained the gain of the noise according to reference clock signal and recovered clock signal
I.e. master network node transmits information to from the noise of network node.It does not need using external expensive measuring instrument come time of measuring
The transmission characteristic of noise, cost is relatively low.
Further, after obtaining recovered clock signal, the noise in signal can be filtered, Fig. 6 is please referred to, in network
In the other embodiments of node, network node 10 further includes filter 17, and the filter 17 is electrically connected at the second locking list
Between member 14 and time comparing unit 15.After obtaining the noise transmitting information, it can also show that the noise transmits information,
To provide reference, alternatively, directly transmitting the parameter of Information revision filter 17 according to the noise.It can also both show that the noise passed
Information is passed, and the parameter of correction wave filter 17 simultaneously.Fig. 6 is please referred to, in the other embodiments of network node, controller 13 is also
It is electrically connected with filter 17, controller 13 is also used to transmit the parameter of Information revision filter 17 according to the noise.Control
Device 13 also communicates to connect (wired connection or wireless connection) with display device 30, so that display device 30 shows that the noise passes
Pass information.Wherein, display device 30 can be set in network node 10, also can be set outside network node 10.
The embodiment of the present invention can not only send display end for noise transmitting information delay and monitor in real time, and can will obtain
The noise obtained transmits information real-time delivery to PTP from network node, so as to so as to directly correct measurand from network node
Filter parameter, formed closed-loop control.
The embodiment of the present application provides a kind of non-volatile computer readable storage medium storing program for executing, the computer-readable storage medium
Matter is stored with computer executable instructions, which is executed by one or more processors, such as in Fig. 4
One processor 131 may make said one or multiple processors that the measurement method in above-mentioned any means embodiment can be performed,
For example, executing method and step 101 in the method and step 101-103, Fig. 3 in Fig. 1 described above to step 105.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.
By the description of above embodiment, those of ordinary skill in the art can be understood that each embodiment can borrow
Help software that the mode of general hardware platform is added to realize, naturally it is also possible to pass through hardware.Those of ordinary skill in the art can manage
Solution realize above-described embodiment method in all or part of the process be can be instructed by computer program relevant hardware come
It completes, the program can be stored in a computer-readable storage medium, and the program is when being executed, it may include such as above-mentioned each
The process of the embodiment of method.Wherein, the storage medium can be magnetic disk, CD, read-only memory (Read-Only
Memory, ROM) or random access memory (RandomAccessMemory, RAM) etc..
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；At this
It under the thinking of invention, can also be combined between the technical characteristic in above embodiments or different embodiment, step can be with
It is realized with random order, and there are many other variations of different aspect present invention as described above, for simplicity, they do not have
Have and is provided in details；Although the present invention is described in detail referring to the foregoing embodiments, the ordinary skill people of this field
Member is it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of skill
Art feature is equivalently replaced；And these are modified or replaceed, each reality of the present invention that it does not separate the essence of the corresponding technical solution
Apply the range of a technical solution.
Claims (10)
1. a kind of temporal noise transmission characteristic measurement method is used for network node, the network node and other at least one nets
The communication connection of network node, the network node are used as from network node, which is characterized in that the described method includes:
Reference clock signal is obtained, the reference clock signal is obtained by locking clock source signals；
The message of other network nodes transmission is obtained, noise is generated and the noise is added to the original time of the message
Stamp synchronizes the clock of other network nodes according to the timestamp after superimposed noise, when obtaining the recovery for carrying noise
Clock signal, other described network nodes also lock the clock source signals；
Other described network nodes and institute are obtained according to the reference clock signal and the recovered clock signal for carrying noise
State the noise transmitting information between network node.
2. measurement method according to claim 1, which is characterized in that described according to the reference clock signal and described to take
Recovered clock signal with noise obtains the noise between other described network nodes and the network node and transmits information, packet
It includes:
Obtain the time difference of the reference clock signal and the recovered clock signal for carrying noise；
Sampling obtains multiple time differences, obtains difference curve according to multiple time differences；
The peak value for obtaining the difference curve, obtains the noise according to the peak value and raw noise and transmits information.
3. measurement method according to claim 1 or 2, which is characterized in that described that the noise is added to the message
Original time stamp, comprising:
Noise phase corresponding value when receiving the message is added to the original time stamp of the message.
4. measurement method according to claim 1, which is characterized in that described same according to the timestamp after superimposed noise
The clock for walking other network nodes, obtains the recovered clock signal for carrying noise, comprising:
Synchronize the clock of other network nodes according to the timestamp after superimposed noise, and to the clock signal of acquisition into
Row filtering obtains the recovered clock signal for carrying noise；
The method also includes:
Display device is sent by noise transmitting information, so that the display device shows the noise transmitting information；
And/or
According to the parameter of filtering described in noise transmitting Information revision.
5. a kind of network node, which is characterized in that the network node includes:
Transceiver communication device, the transceiver communication device is used to receive clock source signals, and sends and receivees message；
First lock cell, first lock cell and the transceiver communication device are electrically connected, for locking clock source letter
Number, obtain reference clock signal；
Noise generator, for generating noise；
Second lock cell, second lock cell electrically connect with the transceiver communication device and the noise generator respectively
It connects, the message sent for obtaining other received network nodes of the transceiver communication device generates the noise generator
Noise be added to the original time stamp of the message, and other described networks are synchronized according to the timestamp after superimposed noise
The clock of node, obtains recovered clock signal, other described network nodes also lock the clock source signals；
Time comparing unit, the time comparing unit and first lock cell and second lock cell are electrical respectively
Connection, for obtaining the time difference of the reference clock signal and the recovered clock signal；
Controller, the controller and the time comparing unit are electrically connected, for being sampled to the time difference, and
The transmitting information of the noise between the network node and other described network nodes is obtained according to each sampled value.
6. network node according to claim 5, which is characterized in that the network node further includes filter, the filter
Wave device is electrically connected between second lock cell and the time comparing unit, and the filter is described extensive for filtering
Noise in multiple clock signal, the controller are also electrically connected with the filter, and the controller is also used to according to
Noise transmits the parameter of filter described in Information revision.
7. network node according to claim 5 or 6, which is characterized in that the controller also with display device communication link
It connects, so that the display device shows the noise transmitting information.
8. network node according to claim 5, which is characterized in that the clock source signals are GPS clock signal；
First lock cell is phase-locked loop circuit；
The time comparing unit is comparator.
9. a kind of network node, which is characterized in that the network node includes:
Transceiver communication device, the transceiver communication device is used to receive clock source signals, and sends and receivees message；
First lock cell, first lock cell and the transceiver communication device are electrically connected, for locking clock source letter
Number, obtain reference clock signal；
Controller is electrically connected with the transceiver communication device and first lock cell respectively；
The controller includes:
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
It manages device to execute, so that at least one described processor is able to carry out the described in any item methods of claim 1-4.
10. a kind of non-volatile computer readable storage medium storing program for executing, which is characterized in that the computer-readable recording medium storage has
Computer executable instructions make the network node right of execution when the computer executable instructions are executed by network node
Benefit requires described in any item methods of 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810133981.5A CN110138487B (en) | 2018-02-09 | 2018-02-09 | Time noise transfer characteristic measurement method and network node |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810133981.5A CN110138487B (en) | 2018-02-09 | 2018-02-09 | Time noise transfer characteristic measurement method and network node |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110138487A true CN110138487A (en) | 2019-08-16 |
| CN110138487B CN110138487B (en) | 2024-01-12 |
Family
ID=67567921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810133981.5A Active CN110138487B (en) | 2018-02-09 | 2018-02-09 | Time noise transfer characteristic measurement method and network node |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110138487B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021010A1 (en) * | 2020-07-27 | 2022-02-03 | Shenzhen University | Method and apparatus for clock synchronization in wireless network |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6480315B1 (en) * | 1999-08-06 | 2002-11-12 | Nortel Networks Limited | Method and apparatus for SNR measurement |
| CN101047455A (en) * | 2006-03-29 | 2007-10-03 | 华为技术有限公司 | Method and device for reducing environment coupling noise |
| US20080049743A1 (en) * | 2006-02-01 | 2008-02-28 | Zampetti George P | Enhanced clock control in packet networks |
| US7346279B1 (en) * | 2002-03-25 | 2008-03-18 | Forster Energy Llc | Optical transceiver using heterodyne detection and a transmitted reference clock |
| US20080265958A1 (en) * | 2005-03-31 | 2008-10-30 | Freescale Semiconductor, Inc. | Method for Noise Reduction in a Phase Locked Loop and a Device Having Noise Reduction Capabilities |
| US20110044357A1 (en) * | 2005-06-28 | 2011-02-24 | Alon Shtern | System and method for high precision clock recovery over packet networks |
| US20150222367A1 (en) * | 2012-08-28 | 2015-08-06 | Telefonktiebolaget L M Erisson (publ) | Analog Phase Noise Compensation for Coherent Optical Communication |
| CN105071890A (en) * | 2015-07-27 | 2015-11-18 | 电子科技大学 | Self-adaptive clock synchronization method with high robustness |
| CN106027193A (en) * | 2016-07-07 | 2016-10-12 | 广州市国飞信息科技有限公司 | Clock synchronization method, module, equipment and system for network timing system |
| JP2017034383A (en) * | 2015-07-30 | 2017-02-09 | 富士通株式会社 | Transmission equipment and synchronization method |
| CN207884639U (en) * | 2018-02-09 | 2018-09-18 | 深圳市英特瑞半导体科技有限公司 | A kind of network node, temporal noise transmission characteristic measuring device and synchronous communication network |
-
2018
- 2018-02-09 CN CN201810133981.5A patent/CN110138487B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6480315B1 (en) * | 1999-08-06 | 2002-11-12 | Nortel Networks Limited | Method and apparatus for SNR measurement |
| US7346279B1 (en) * | 2002-03-25 | 2008-03-18 | Forster Energy Llc | Optical transceiver using heterodyne detection and a transmitted reference clock |
| US20080265958A1 (en) * | 2005-03-31 | 2008-10-30 | Freescale Semiconductor, Inc. | Method for Noise Reduction in a Phase Locked Loop and a Device Having Noise Reduction Capabilities |
| US20110044357A1 (en) * | 2005-06-28 | 2011-02-24 | Alon Shtern | System and method for high precision clock recovery over packet networks |
| US20080049743A1 (en) * | 2006-02-01 | 2008-02-28 | Zampetti George P | Enhanced clock control in packet networks |
| CN101047455A (en) * | 2006-03-29 | 2007-10-03 | 华为技术有限公司 | Method and device for reducing environment coupling noise |
| US20150222367A1 (en) * | 2012-08-28 | 2015-08-06 | Telefonktiebolaget L M Erisson (publ) | Analog Phase Noise Compensation for Coherent Optical Communication |
| CN105071890A (en) * | 2015-07-27 | 2015-11-18 | 电子科技大学 | Self-adaptive clock synchronization method with high robustness |
| JP2017034383A (en) * | 2015-07-30 | 2017-02-09 | 富士通株式会社 | Transmission equipment and synchronization method |
| CN106027193A (en) * | 2016-07-07 | 2016-10-12 | 广州市国飞信息科技有限公司 | Clock synchronization method, module, equipment and system for network timing system |
| CN207884639U (en) * | 2018-02-09 | 2018-09-18 | 深圳市英特瑞半导体科技有限公司 | A kind of network node, temporal noise transmission characteristic measuring device and synchronous communication network |
Non-Patent Citations (3)
| Title |
|---|
| 寸天睿;: "TDM网络时钟同步改进方法研究", 电子技术与软件工程, no. 14 * |
| 李俊儒等: "SerDes中时钟数据恢复电路的设计与验证", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 王晨: "160Gbit/s光时分复用系统中时钟提取与解复用器模块的研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022021010A1 (en) * | 2020-07-27 | 2022-02-03 | Shenzhen University | Method and apparatus for clock synchronization in wireless network |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110138487B (en) | 2024-01-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8873589B2 (en) | Methods and devices for clock synchronization | |
| EP3284244B1 (en) | Methods, systems, and computer readable media for emulating network devices with different clocks | |
| EP2528254B1 (en) | Method and device for time synchronization | |
| CN103929293B (en) | Asymmetrically-delayed time synchronization method and system | |
| US20100074383A1 (en) | Timestamping method and apparatus for precise network synchronization | |
| EP2595331A2 (en) | Communication apparatus for performing time synchronization | |
| CN103905135B (en) | Realize the method, apparatus and system of time synchronized | |
| CN110784275B (en) | Time synchronization deviation adjusting method, device, terminal and access stratum equipment | |
| CN106357362B (en) | A kind of method for synchronizing time, device and PTP system | |
| CN103563287B (en) | Synchronization device and synchronization method | |
| CN108880727B (en) | A kind of precision clock synchronization realizing method based on PTPd2 agreement | |
| CN108471337B (en) | A method of realizing time synchronization in FC network | |
| WO2020043181A1 (en) | Clock synchronization method and apparatus, system, storage medium, and electronic device | |
| WO2004036341A3 (en) | Synchronizing between terminals of asynchronous networks using timestamps | |
| CN105553595B (en) | Equipment and its synchronous method in a kind of distributed system | |
| CN103188064A (en) | Clock synchronization method and clock synchronization device | |
| CN106712885B (en) | Clock synchronizing method, the network equipment and network system | |
| CN105207767B (en) | A kind of PTP master clocks and the method and device from Frequency Synchronization between clock | |
| EP2893655A1 (en) | Methods and devices for clock synchronization | |
| CN107786293A (en) | Method for synchronizing time, clock equipment, from clockwork and clock synchronization system | |
| CN109565772A (en) | Method for synchronizing time, equipment and storage medium | |
| CN103166792A (en) | Line asymmetrical compensation method, equipment and system | |
| CN207884639U (en) | A kind of network node, temporal noise transmission characteristic measuring device and synchronous communication network | |
| CN108964825A (en) | Calibration method, correction device and time server | |
| CN110138487A (en) | A kind of temporal noise transmission characteristic measurement method and network node |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |