CN106341218A - Clock synchronization method and device based on windows operating system - Google Patents
Clock synchronization method and device based on windows operating system Download PDFInfo
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- CN106341218A CN106341218A CN201510391243.7A CN201510391243A CN106341218A CN 106341218 A CN106341218 A CN 106341218A CN 201510391243 A CN201510391243 A CN 201510391243A CN 106341218 A CN106341218 A CN 106341218A
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Abstract
The invention provides a clock synchronization method and device based on a windows operating system. The clock synchronization method comprises the steps of capturing a synchronization packet sent by master clock equipment by using pre-installed packet capturing software, and recording a capturing timestamp T2; parsing a transmission timestamp T1 carried in the synchronization packet for transmitting the synchronization packet of the master clock equipment; packaging a time delay request packet by using the packet capturing software, transmitting the packaged time delay request packet to the master clock equipment, and recording a packaging timestamp T3; capturing a time delay response packet by using the packet capturing software, and parsing a transmitting timestamp T4 carried in the time delay response packet for transmitting the time delay response packet of the master clock equipment; and calculating clock skew of slave clock equipment and the master clock equipment according to the timestamps T1, T2, T3 and T4, and time calibration is carried out on the slave clock equipment according to the clock skew. According to the invention, timestamp parameters required by time synchronization are acquired through the packet capturing software, and extra hardware is not required to be added to the slave clock equipment, so that hardware resources are saved, and the cost is reduced.
Description
Technical field
The present invention relates to networking technology area, more particularly, to a kind of clock based on windows operating system is together
One step process and device.
Background technology
Ieee1588 agreement is a kind of accurate clock synchronization protocol set up on the basis of message, based on ptp
Agreement (precision timing protocol, precision time protocol) is disappeared in master clock between clock
Breath transmission, can realize exact time synchronization and Frequency Synchronization in the network of packet transmission.Its medium frequency is same
Step refers to the particular kind of relationship that frequency or phase place are occurred with same Mean Speed in corresponding significant instant, thus tieing up
All of equipment in communication network of holding is run with identical speed.Clock synchronously refers to the frequency phase between signal
With, and be consistent in phase place.
Ieee1588 agreement is mainly used in EPA, by the switch in EPA or industry
Equipment as clock equipment, the equipment of windows operating system as from clockwork, from clockwork
Set time based on ieee1588 agreement and clock equipment, thus reach setting with master clock from clockwork
The synchronous purpose of standby clock.
The equipment of existing windows operating system is this not to be possessed for receiving main equipment from clockwork
The sync message sending stamps reception timestamp, the latency request message being sent to clock equipment is stamped and sends out
Send the function of timestamp, at present, realize the side of when clockwork is with clock equipment pair (clock is synchronous)
Case is:
Hardware from clockwork (equipment of windows operating system) is improved, such as adds
Fpga module or phy chip, thus stamped for above-mentioned message using fpga module or phy chip
Timestamp, so that calculate master-salve clock from clockwork according to each timestamp ieee1588 set
Time deviation between standby, so make from clockwork according to this time deviation and clock equipment carry out right
When.
But, this scheme realized when clockwork is with clock equipment pair, need to increase from clock
Hardware in equipment, the hardware that these increase may not reuse, thus leading to hardware resource waste,
And when from clockwork quantity more when, when each from clockwork be required for increase hardware when, relatively costly.
Content of the invention
The present invention provides a kind of clock synchronizing method based on windows operating system and device, for solving
The hardware resource waste brought based on the clock synchronizing method of windows operating system of the prior art, is become
This higher problem.
A kind of clock synchronizing method based on windows operating system, comprising:
Utilize the sync message of preassembled packet capturing software grabs clock equipment transmission from clockwork, and
Record captures the crawl timestamp t2 of described sync message, described from the operating system of clockwork is
Windows operating system；
When parsing the transmission that the described clock equipment carrying in described sync message sends described sync message
Between stab t1；
It is sent to master using described packet capturing software by after the latency request message encapsulation for described sync message
Clockwork, and record the packaging time stamp t3 encapsulating described latency request message；
It is directed to prolonging of described latency request message return using clock equipment described in described packet capturing software grabs
When response message, and parse the described clock equipment carrying in described time delay response message and send described time delay
The transmission timestamp t4 of response message；
According to described t1, t2, t3 and t4, calculate the clock jitter from clockwork and clock equipment,
And set time to from clockwork according to this clock jitter.
In methods described, using the sync message of preassembled packet capturing software grabs clock equipment transmission,
And record the crawl timestamp t2 capturing described sync message, specifically include:
Capture the first message that clock equipment sends using preassembled packet capturing software cycle, described the
One message carries the crawl timestamp capturing described first message；
When determining described first message for sync message, record captures the crawl timestamp of described sync message
t2；
It is directed to prolonging of described latency request message return using clock equipment described in described packet capturing software grabs
When response message, and parse the described clock equipment carrying in described time delay response message and send described time delay
The transmission timestamp t4 of response message, specifically includes:
Capture the first message that clock equipment sends using described packet capturing software cycle, the first message carries
Capture the crawl timestamp of described first message；
When determining described first message for described time delay response message, parse in described time delay response message and carry
Described clock equipment send the transmission timestamp t4 of described time delay response message.
The embodiment of the present invention utilizes the first message of packet capturing software grabs, can obtain from clockwork and master clock
Timestamp parameter necessary to equipment room clock synchronization.
Methods described, after being encapsulated the latency request message for described sync message using described packet capturing software
It is sent to clock equipment, and record the packaging time stamp t3 encapsulating described latency request message, concrete bag
Include:
It is sent to clock equipment after described latency request message being encapsulated using preassembled packet capturing software,
The packaging time stamp t3 encapsulating described latency request message is carried in latency request message after described encapsulation；
The packaging time stamp t3 carrying in latency request message after the described encapsulation of parsing, and record described envelope
ETL estimated time of loading stabs t3.
The embodiment of the present invention utilizes the first message of packet capturing software grabs, can obtain from clockwork and master clock
Timestamp parameter necessary to equipment room clock synchronization.
In methods described, according to this clock jitter to after clockwork sets time, also include:
Periodically restart described packet capturing software；Or
The clock jitter between clockwork and described packet capturing software after during determination pair is more than given threshold
When, restart described packet capturing software.
After this preferred embodiment is when from clockwork pair, by restarting packet capturing software, make packet capturing software with from
Clockwork clock is synchronous, can avoid to a certain extent due between clockwork and described packet capturing software
The asynchronous problem that precision reduces when clockwork is with clock equipment pair brought of clock.
In methods described, described first message is ieee1588 message, then utilize preassembled packet capturing soft
Part periodically captures the first message that clock equipment sends, and specifically includes:
Periodically capture clock equipment using the Hook Function in described preassembled packet capturing software to send
Message；
Filter out ieee1588 message from the message that described clock equipment sends.
The embodiment of the present invention, periodically captures clock equipment by the Hook Function in packet capturing software and sends
Message, and for crawl clock equipment send message screened, thus filtering out ieee1588
Message, i.e. the first message.
The present invention also provides a kind of clock synchronization apparatus based on windows operating system, comprising:
Handling module, for the synchronization report being sent using preassembled packet capturing software grabs clock equipment
Literary composition, and record the crawl timestamp t2 capturing described sync message, the described operating system from clockwork
For windows operating system；
Parsing module, sends described synchronization for parsing the described clock equipment carrying in described sync message
The transmission timestamp t1 of message；
Transmitting element, for being sealed the latency request message for described sync message using described packet capturing software
It is sent to clock equipment after dress, and record the packaging time stamp t3 encapsulating described latency request message；
Described handling module is additionally operable to, and is directed to described prolonging using clock equipment described in described packet capturing software grabs
When request message return time delay response message, and parse carry in described time delay response message described main when
Clock equipment sends the transmission timestamp t4 of described time delay response message；
Pair when module, according to described t1, t2, t3 and t4, calculate from clockwork and clock equipment
Clock jitter, and set time to from clockwork according to this clock jitter.
In described device, described handling module specifically for:
Capture the first message that clock equipment sends using preassembled packet capturing software cycle, described the
One message carries the crawl timestamp capturing described first message；
When determining described first message for sync message, record captures the crawl timestamp of described sync message
t2；
Described handling module is additionally operable to:
Capture the first message that clock equipment sends using described packet capturing software cycle, the first message carries
Capture the crawl timestamp of described first message；
When determining described first message for described time delay response message, parse in described time delay response message and carry
Described clock equipment send the transmission timestamp t4 of described time delay response message.
In described device, described transmitting element specifically for:
It is sent to clock equipment after described latency request message being encapsulated using preassembled packet capturing software,
The packaging time stamp t3 encapsulating described latency request message is carried in latency request message after described encapsulation；
The packaging time stamp t3 carrying in latency request message after the described encapsulation of parsing, and record described envelope
ETL estimated time of loading stabs t3.
In described device, when described pair, module is additionally operable to:
Periodically restart described packet capturing software；Or
The clock jitter between clockwork and described packet capturing software after during determination pair is more than given threshold
When, restart described packet capturing software.
Described device, when described first message is ieee 1588 message, then described handling module is utilizing
When preassembled packet capturing software cycle captures the first message that clock equipment sends, specifically for:
Periodically capture clock equipment using the Hook Function in described preassembled packet capturing software to send
Message；
Filter out ieee 1588 message from the message that described clock equipment sends.
Using the clock synchronizing method based on windows operating system provided in an embodiment of the present invention and device,
Have the advantages that do not need extra hard in installing from clockwork of windows operating system
Part, can get the timestamp parameter required for clock synchronization by preassembled packet capturing software, thus root
Realize the clock synchronization between clockwork and clock equipment according to timestamp parameter, and then save hardware money
Source, and a packet capturing software can be installed and used from clockwork in multiple stage, thus reducing to a certain extent
Cost.
Brief description
Fig. 1 is the clock synchronizing method flow process based on windows operating system provided in an embodiment of the present invention
Figure；
Fig. 2 is crawl sync message provided in an embodiment of the present invention the method flow recording crawl timestamp
Figure；
Fig. 3 is encapsulation latency request message provided in an embodiment of the present invention the method stream recording packaging time stamp
Cheng Tu；
Fig. 4 is crawl time delay response message provided in an embodiment of the present invention the transmission timestamp obtaining this message
Method flow diagram；
Fig. 5 captures this ie1588 report for provided in an embodiment of the present invention when the first message is ieee1588
The method flow diagram of literary composition；
Fig. 6 is that the clock synchronization apparatus based on windows operating system provided in an embodiment of the present invention are illustrated
Figure.
Specific embodiment
Clock synchronizing method based on windows operating system provided in an embodiment of the present invention and device are bases
In clock synchronizing method and the device of ieee1588 agreement, with reference to the accompanying drawings and examples the present invention is carried
For the clock synchronizing method based on windows operating system and device be described in detail.
The embodiment of the present invention provides a kind of clock synchronizing method based on windows operating system, as Fig. 1 institute
Show, comprising:
Step 101, utilizes the same of preassembled packet capturing software grabs clock equipment transmission from clockwork
Step message, and record the crawl timestamp t2 capturing described sync message, the described operation from clockwork
System is windows operating system.
Specifically, it is windows operating system from the operating system of clockwork, from clockwork can be
Operating system is that the computer of windows operating system can also possess setting of windows operating system for other
Standby, do not limit here.Clock equipment is switch or other industry in EPA
Equipment, does not limit here.
Preassembled packet capturing software in the embodiment of the present invention can capture the message of clock equipment transmission,
Will stamp for this message after the message that this packet capturing software grabs clock equipment sends and grasp at grabbing of this message
Take timestamp, specifically, in the message of this packet capturing software grabs, comprise the synchronization of clock equipment transmission
(sync) message, the crawl timestamp t2 carrying in the sync message of packet capturing software grabs is as from clock
Equipment receives the time of sync message.
Step 102, parses the described clock equipment carrying in described sync message and sends described sync message
Transmission timestamp t1.
Specifically, carry clock equipment in the sync message that clock equipment sends and send this sync message
Transmission timestamp t1, need to parse this transmission timestamp t1 from clockwork, from can be according to this transmission
It is synchronous that timestamp t1 and clock equipment enter row clock.
Step 103, using preassembled packet capturing software by the latency request message for described sync message
It is sent to clock equipment after encapsulation, and record the packaging time stamp t3 encapsulating described latency request message.
In prior art, after clockwork receives the sync message of clock equipment transmission, can be same for this
Step message sends a latency request message (delay_req).The embodiment of the present invention from clockwork to
Before clock equipment forward delay interval request message, in order to obtain sending this latency request message from clockwork
Timestamp, using preassembled packet capturing software, this latency request message is packaged, and records encapsulation
Latency request message packaging time stamp t3, using this timestamp t3 as from clockwork send this time delay please
Seek the timestamp of message.Specifically, this packaging time stamp t3 can be carried in the latency request message after encapsulation.
Step 104, being directed to described time delay using clock equipment described in preassembled packet capturing software grabs please
Seek the time delay response message that message returns, and parse the described master clock carrying in described time delay response message and set
Preparation send the transmission timestamp t4 of described time delay response message.
Specifically, clock equipment is receiving after the latency request message that clockwork sends, and can be directed to
This latency request message returns time delay response message (delay_resp), utilizes preassembled from clockwork
This time delay response message of packet capturing software grabs, thus obtain clock equipment by parsing this time delay response message
Send the transmission timestamp t4 of this time delay response message.
Step 105, according to described t1, t2, t3 and t4, calculates from clockwork and clock equipment
Clock jitter, and set time to from clockwork according to this clock jitter.
Specifically, from clockwork according to timestamp t1, t2, t3 and t4, calculate from clockwork with
The clock jitter of clock equipment time, specifically can be counted according to the existing method calculating clock jitter
Calculate, repeat no more here.It is right to be carried out according to calculated clock jitter and clock equipment from clockwork
When, thus the clock realized between clockwork and clock equipment is synchronous.
The embodiment of the present invention, has obtained reception from clockwork by using packet capturing software grabs sync message same
Step message reception timestamp t2, by encapsulate latency request message obtain forward delay interval request message when
Between stab t3, by capture time delay response message obtain clock equipment forward delay interval response message transmission when
Between stab t4, thus provide from clockwork and clock equipment enter row clock synchronous when requisite when
Between stab parameter.
The embodiment of the present invention is it is not necessary to extra hard in installing from clockwork of windows operating system
Part, can get the timestamp parameter required for clock synchronization by preassembled packet capturing software, thus root
Realize the clock synchronization between clockwork and clock equipment according to timestamp parameter, and then save hardware money
Source, and a packet capturing software can be installed and used from clockwork in multiple stage, thus reducing to a certain extent
Cost.
Preferably, in step 101, same using the transmission of preassembled packet capturing software grabs clock equipment
Step message, and record the crawl timestamp t2 capturing described sync message, as shown in Fig. 2 specifically including:
Step 201, captures, using preassembled packet capturing software cycle, the first report that clock equipment sends
Literary composition, described first message carries the timestamp capturing described first message.
Specifically, due to packet capturing software possess crawl packet and for packet stamp capture timestamp work(
Can, the embodiment of the present invention is installing packet capturing software from clockwork in advance, using this packet capturing software cycle
The first message that crawl clock equipment sends, and stamp the crawl timestamp capturing this first message, wherein,
This first message may be for sync message it is also possible to be other messages.
Step 202, when determining described first message for sync message, record captures grabbing of described sync message
Take timestamp t2.
Specifically, parsing the first message of packet capturing software grabs from clockwork, and analyze this first message is
No for sync message, when being defined as sync message, extract the crawl timestamp t2 capturing this sync message.
The embodiment of the present invention, can beat the work(of timestamp using existing packet capturing software for the packet of crawl
Can, obtain capturing the crawl timestamp t2 of sync message, t2 has been received synchronization as from clockwork
The reception timestamp of message, thus be before clock between clockwork and clock equipment has simultaneously provided
Carry.
Preferably, in step 103, using preassembled packet capturing software by prolonging for described sync message
When request message encapsulation after be sent to clock equipment, and when recording the encapsulation encapsulating described latency request message
Between stab t3, as shown in figure 3, specifically including:
Step 301, is sent to master after encapsulating described latency request message using preassembled packet capturing software
Clockwork, carries when encapsulating the encapsulation of described latency request message in the latency request message after described encapsulation
Between stab t3.
Step 302, the packaging time stamp t3 carrying in the latency request message after the described encapsulation of parsing, and remember
Record described packaging time stamp t3.
Specifically, packet capturing software is packaged to latency request message, and this prolongs to stamp encapsulation in encapsulation process
When ask packaging time stamp t3, this packaging time stamp can be used as from clockwork forward delay interval request message
Timestamp, from clockwork by parse this encapsulation after latency request message, obtain packaging time stamp
T3, this packaging time stamp can be as the transmission timestamp from clockwork forward delay interval request message, thus being
Clock between clockwork and clock equipment simultaneously provides premise.
Preferably, in step 104, it is directed to using clock equipment described in preassembled packet capturing software grabs
The time delay response message that described latency request message returns, and parse the institute carrying in described time delay response message
State the transmission timestamp t4 that clock equipment sends described time delay response message, as shown in figure 4, concrete wrap
Include:
Step 401, captures, using preassembled packet capturing software cycle, the first report that clock equipment sends
Literary composition, the first message carries the crawl timestamp capturing described first message.
Step 402, when determining described first message for described time delay response message, parsing described time delay response
The described clock equipment carrying in message sends the transmission timestamp t4 of described time delay response message.
Parse the first message of packet capturing software grabs from clockwork, and analyze this first message be whether for
The time delay response message that described latency request message returns, when determining this time delay response message, is grabbed by parsing
The time delay response message of bag software grabs, when can obtain the transmission that clock equipment sends this time delay response message
Between stab t4, thus being that clock between clockwork and clock equipment simultaneously provides premise.
Preferably, in step 105, according to this clock jitter to after clockwork sets time, also include:
Periodically restart described packet capturing software；Or
The clock jitter between clockwork and described packet capturing software after during determination pair is more than given threshold
When, restart described packet capturing software.
Specifically, rear due to setting time from clockwork, from clockwork, preassembled packet capturing is soft
The clock of part will be asynchronous with the clock from clockwork, therefore, periodically restart packet capturing software or,
When the clock jitter between clockwork and described packet capturing software after during determination pair is more than given threshold, weight
Open described packet capturing software, so that packet capturing software is synchronous with the clock from clockwork
If during the clock jitter between clockwork and described packet capturing software excessive (clock is asynchronous),
Using the clock synchronizing method based on windows operating system provided in an embodiment of the present invention, can lead to from when
The problem that when clock equipment and clock equipment pair, precision reduces.This preferred embodiment is when from clockwork pair
Afterwards, by restarting packet capturing software, make packet capturing software synchronous with from clockwork clock, can be to a certain extent
Avoid due between clockwork and described packet capturing software clock asynchronous bring from clockwork and master
The problem that during clockwork pair, precision reduces.
Preferably, described first message is ieee1588 message, then utilize preassembled packet capturing software week
Phase property captures the first message that clock equipment sends, as shown in figure 5, specifically including:
Step 501, periodically captures master clock using the Hook Function in described preassembled packet capturing software
The message that equipment sends.
Step 502, filters out ieee 1588 message from the message that described clock equipment sends.
Specifically, the message that clock equipment sends is multiple format, and the Hook Function in packet capturing software is only born
Duty periodically captures the message that clock equipment sends.The clock equipment being directed to crawl from clockwork is sent out
The message sending is screened, thus filtering out ieee 1588 message, that is, filters out the first message.Wherein,
Ieee 1588 message comprises the message of udp form and the message of ieee 802.3 form.That is, above-mentioned synchronization
Message is ieee 1588 message.
Preferably, preassembled packet capturing software is wincap packet capturing software.
Specifically, call the pcap_findalldevs function in the wincap tool storage room of wincap packet capturing software
Select the network interface card from clockwork；Call the pcap_open_live function in wincap tool storage room open from
The network interface card of clockwork is simultaneously suspended to the network interface card from clockwork by catching the Hook Function in function pcap_loop
On, the message that clock equipment sends is captured by Hook Function and stamps crawl timestamp for these messages；
Latency request message after encapsulating is sent to master by pcap_sendpacket interface by wincap packet capturing software
Clockwork.The timestamp precision that wincap packet capturing software is stamped is delicate level, but due to windows
The time precision of operating system is Millisecond, therefore using clock synchronizing method provided in an embodiment of the present invention
The precision constantly, needing the timestamp stamping packet capturing software is converted to Millisecond, wherein wincap grabs
The argument structure of the Hook Function in bag software is struct pcap_pkthdr*header.More specific utilization
The method of wincap packet capturing software packet capturing can be found in prior art, is not set forth in detail here.
Based on same with the clock synchronizing method based on windows operating system provided in an embodiment of the present invention
Inventive concept, the embodiment of the present invention also provides a kind of clock based on windows operating system synchronously to fill
Put, as shown in Figure 6, comprising:
Handling module 601, for the synchronization being sent using preassembled packet capturing software grabs clock equipment
Message, and record the crawl timestamp t2 capturing described sync message, the described operation system from clockwork
Unite as windows operating system；
Parsing module 602, described for parsing the described clock equipment transmission carrying in described sync message
The transmission timestamp t1 of sync message；
Transmitting element 603, for using described packet capturing software by the latency request report for described sync message
It is sent to clock equipment after literary composition encapsulation, and record the packaging time stamp t3 encapsulating described latency request message；
Described handling module 601 is additionally operable to, and is directed to institute using clock equipment described in described packet capturing software grabs
State the time delay response message of latency request message return, and parse carry in described time delay response message described
Clock equipment sends the transmission timestamp t4 of described time delay response message；
Pair when module 604, according to described t1, t2, t3 and t4, calculate from clockwork and master clock
The clock jitter of equipment, and set time to from clockwork according to this clock jitter.
Preferably, in described device, described handling module specifically for:
Capture the first message that clock equipment sends using preassembled packet capturing software cycle, described the
One message carries the crawl timestamp capturing described first message；
When determining described first message for sync message, record captures the crawl timestamp of described sync message
t2；
Preferably, described handling module is additionally operable to:
Capture the first message that clock equipment sends using described packet capturing software cycle, the first message carries
Capture the crawl timestamp of described first message；
When determining described first message for described time delay response message, parse in described time delay response message and carry
Described clock equipment send the transmission timestamp t4 of described time delay response message.
Preferably, in described device, described transmitting element specifically for:
It is sent to clock equipment after described latency request message being encapsulated using preassembled packet capturing software,
The packaging time stamp t3 encapsulating described latency request message is carried in latency request message after described encapsulation；
The packaging time stamp t3 carrying in latency request message after the described encapsulation of parsing, and record described envelope
ETL estimated time of loading stabs t3.
Preferably, in described device, when described pair, module is additionally operable to:
Periodically restart described packet capturing software；Or
The clock jitter between clockwork and described packet capturing software after during determination pair is more than given threshold
When, restart described packet capturing software.
Preferably, described device, when described first message is ieee 1588 message, then described crawl mould
Block using preassembled packet capturing software cycle capture clock equipment send the first message when, specifically
For:
Periodically capture clock equipment using the Hook Function in described preassembled packet capturing software to send
Message；
Filter out ieee 1588 message from the message that described clock equipment sends.
Using the clock synchronizing method based on windows operating system provided in an embodiment of the present invention and device,
Have the advantages that do not need extra hard in installing from clockwork of windows operating system
Part, can get the timestamp parameter required for clock synchronization by preassembled packet capturing software, thus root
Realize the clock synchronization between clockwork and clock equipment according to timestamp parameter, and then save hardware money
Source, and a packet capturing software can be installed and used from clockwork in multiple stage, thus reducing to a certain extent
Cost.
The present invention is to produce with reference to method according to embodiments of the present invention, equipment (system) and computer program
The flow chart of product and/or block diagram are describing.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or the flow process in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embed
The processor of formula datatron or other programmable data processing device is to produce a machine so that passing through to calculate
The instruction of the computing device of machine or other programmable data processing device produces for realizing in flow chart one
The device of the function of specifying in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or other programmable datas can be guided to process and set
So that being stored in this computer-readable memory in the standby computer-readable memory working in a specific way
Instruction produce and include the manufacture of command device, the realization of this command device is in one flow process or multiple of flow chart
The function of specifying in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Obtain and series of operation steps is executed on computer or other programmable devices to produce computer implemented place
Reason, thus the instruction of execution is provided for realizing in flow chart one on computer or other programmable devices
The step of the function of specifying in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creative concept, then can make other change and modification to these embodiments.So, appended right will
Ask and be intended to be construed to including preferred embodiment and fall into being had altered and changing of the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these modification and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these changes and modification.
Claims (10)
1. a kind of clock synchronizing method based on windows operating system is it is characterised in that include:
Utilize the sync message of preassembled packet capturing software grabs clock equipment transmission from clockwork, and
Record captures the crawl timestamp t2 of described sync message, described from the operating system of clockwork is
Windows operating system；
When parsing the transmission that the described clock equipment carrying in described sync message sends described sync message
Between stab t1；
It is sent to master using described packet capturing software by after the latency request message encapsulation for described sync message
Clockwork, and record the packaging time stamp t3 encapsulating described latency request message；
It is directed to prolonging of described latency request message return using clock equipment described in described packet capturing software grabs
When response message, and parse the described clock equipment carrying in described time delay response message and send described time delay
The transmission timestamp t4 of response message；
According to described t1, t2, t3 and t4, calculate the clock jitter from clockwork and clock equipment,
And set time to from clockwork according to this clock jitter.
2. the method for claim 1 is it is characterised in that grabbed using preassembled packet capturing software
Take the sync message that clock equipment sends, and record the crawl timestamp t2 capturing described sync message,
Specifically include:
Capture the first message that clock equipment sends using preassembled packet capturing software cycle, described the
One message carries the crawl timestamp capturing described first message；
When determining described first message for sync message, record captures the crawl timestamp of described sync message
t2；
It is directed to prolonging of described latency request message return using clock equipment described in described packet capturing software grabs
When response message, and parse the described clock equipment carrying in described time delay response message and send described time delay
The transmission timestamp t4 of response message, specifically includes:
Capture the first message that clock equipment sends using described packet capturing software cycle, the first message carries
Capture the crawl timestamp of described first message；
When determining described first message for described time delay response message, parse in described time delay response message and carry
Described clock equipment send the transmission timestamp t4 of described time delay response message.
3. the method for claim 1 is it is characterised in that will be for institute using described packet capturing software
It is sent to clock equipment after the latency request message encapsulation stating sync message, and records the described time delay of encapsulation and ask
The packaging time seeking message stabs t3, specifically includes:
It is sent to clock equipment after described latency request message being encapsulated using preassembled packet capturing software,
The packaging time stamp t3 encapsulating described latency request message is carried in latency request message after described encapsulation；
The packaging time stamp t3 carrying in latency request message after the described encapsulation of parsing, and record described envelope
ETL estimated time of loading stabs t3.
4. method as claimed in claim 2 it is characterised in that: set to from clock according to this clock jitter
For after setting time, also include:
Periodically restart described packet capturing software；Or
The clock jitter between clockwork and described packet capturing software after during determination pair is more than given threshold
When, restart described packet capturing software.
5. method as claimed in claim 2 is it is characterised in that described first message is reported for ieee1588
Literary composition, then utilize preassembled packet capturing software cycle to capture the first message that clock equipment sends, specifically
Including:
Periodically capture clock equipment using the Hook Function in described preassembled packet capturing software to send
Message；
Filter out ieee1588 message from the message that described clock equipment sends.
6. a kind of clock synchronization apparatus based on windows operating system are it is characterised in that include:
Handling module, for the synchronization report being sent using preassembled packet capturing software grabs clock equipment
Literary composition, and record the crawl timestamp t2 capturing described sync message, the described operating system from clockwork
For windows operating system；
Parsing module, sends described synchronization for parsing the described clock equipment carrying in described sync message
The transmission timestamp t1 of message；
Transmitting element, for being sealed the latency request message for described sync message using described packet capturing software
It is sent to clock equipment after dress, and record the packaging time stamp t3 encapsulating described latency request message；
Described handling module is additionally operable to, and is directed to described prolonging using clock equipment described in described packet capturing software grabs
When request message return time delay response message, and parse carry in described time delay response message described main when
Clock equipment sends the transmission timestamp t4 of described time delay response message；
Pair when module, according to described t1, t2, t3 and t4, calculate from clockwork and clock equipment
Clock jitter, and set time to from clockwork according to this clock jitter.
7. device as claimed in claim 6 it is characterised in that described handling module specifically for:
Capture the first message that clock equipment sends using preassembled packet capturing software cycle, described the
One message carries the crawl timestamp capturing described first message；
When determining described first message for sync message, record captures the crawl timestamp of described sync message
t2；
Described handling module is additionally operable to:
Capture the first message that clock equipment sends using described packet capturing software cycle, the first message carries
Capture the crawl timestamp of described first message；
When determining described first message for described time delay response message, parse in described time delay response message and carry
Described clock equipment send the transmission timestamp t4 of described time delay response message.
8. device as claimed in claim 6 it is characterised in that described transmitting element specifically for:
It is sent to clock equipment after described latency request message being encapsulated using preassembled packet capturing software,
The packaging time stamp t3 encapsulating described latency request message is carried in latency request message after described encapsulation；
The packaging time stamp t3 carrying in latency request message after the described encapsulation of parsing, and record described envelope
ETL estimated time of loading stabs t3.
9. device as claimed in claim 7 it is characterised in that when described pair module be additionally operable to:
Periodically restart described packet capturing software；Or
The clock jitter between clockwork and described packet capturing software after during determination pair is more than given threshold
When, restart described packet capturing software.
10. device as claimed in claim 7 is it is characterised in that described first message is ieee1588
Message, then described handling module is using the crawl clock equipment transmission of preassembled packet capturing software cycle
The first message when, specifically for:
Periodically capture clock equipment using the Hook Function in described preassembled packet capturing software to send
Message；
Filter out ieee1588 message from the message that described clock equipment sends.
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| CN201510391243.7A CN106341218A (en) | 2015-07-06 | 2015-07-06 | Clock synchronization method and device based on windows operating system |
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| CN111385051A (en) * | 2018-12-29 | 2020-07-07 | 华为技术有限公司 | Clock synchronization method, device and storage medium |
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| CN116614199A (en) * | 2023-07-14 | 2023-08-18 | 腾讯科技（深圳）有限公司 | Clock synchronization method, device, slave clock equipment, clock synchronization system and medium |
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| CN107145235A (en) * | 2017-05-11 | 2017-09-08 | 杭州幻行科技有限公司 | A kind of virtual reality system |
| CN111385048A (en) * | 2018-12-29 | 2020-07-07 | 中兴通讯股份有限公司 | Time synchronization method and system |
| CN111385051A (en) * | 2018-12-29 | 2020-07-07 | 华为技术有限公司 | Clock synchronization method, device and storage medium |
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| CN109981206A (en) * | 2019-02-26 | 2019-07-05 | 深圳猛犸电动科技有限公司 | Time synchronization method, device, system and terminal device, storage medium |
| CN112600639A (en) * | 2020-12-17 | 2021-04-02 | 珠海市一微半导体有限公司 | Timestamp correction method and system |
| CN116614199A (en) * | 2023-07-14 | 2023-08-18 | 腾讯科技（深圳）有限公司 | Clock synchronization method, device, slave clock equipment, clock synchronization system and medium |
| CN116614199B (en) * | 2023-07-14 | 2023-10-17 | 腾讯科技（深圳）有限公司 | Clock synchronization method, device, slave clock equipment, clock synchronization system and medium |
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