CN106549822A - The method of the response time of testing time sync message, device and test equipment - Google Patents
The method of the response time of testing time sync message, device and test equipment Download PDFInfo
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Abstract
The present invention provides a kind of method of the response time of testing time sync message, device and test equipment, wherein the method for test equipment end includes：Obtain the time of origin T1 that test equipment performs the change operation for enabling to equipment under test response returned packet；The response message that acquisition is devices under correct response change operation and returns reaches the time T2 of test equipment；Obtain for test equipment to the first propagation delay time of the first link of equipment under test transmitting message and for the second propagation delay time from equipment under test to the second link of test equipment transmitting message；By time difference between T2 and T1, poor with the first propagation delay time and the second propagation delay time sum, the result for obtaining is defined as response time.Response time can so be measured, it is also possible to basis is done for synchronizing network deployment and malfunction elimination by response time, and then grasps influential effect of the message change to time synchronized, also facilitate user to improve synchronizing network performance.
Description
Technical field
The present invention relates to field of communication transmission, the more particularly to side of the response time of testing time sync message
Method, device and test equipment.
Background technology
The application in many fields needs exact time synchronization, such as in moving communicating field, various communication standards
It is required that base station meets time synchronized ability normal work between eating dishes without rice or wine.
PTP (Precision Time Protocol, precision clock synchronization) agreement is for the height between equipment
The time synchronization protocol of precision.In a PTP synchronization path, master clock provides source time, for next
Level clock synchronization, that is, for from clock reference.From clock then by with master clock intercommunication message, enter
And the time adjustment local zone time provided according to master clock.Specifically, when equipment is responded and receives message,
For the response time of PTP messages, synchronizing network deployment can determine according to response time and go out
The now malfunction elimination after problem, but prior art has no idea to measure response time.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of side of the response time of testing time sync message
Method, device and test equipment, to solve the problems, such as that prior art has no idea to measure response time.
In order to solve above-mentioned technical problem, a kind of sound of testing time sync message provided in an embodiment of the present invention
Method between seasonable, for test equipment end, the method bag of the response time of the testing time sync message
Include：
First obtaining step, obtains test equipment and performs one and enable to equipment under test response returned packet
Change the time of origin T1 of operation；
Second obtaining step, obtains and described is devices under correctly responding the response for changing operation and return
Message reaches the time T2 of the test equipment；
3rd obtaining step, obtains the first chain to the equipment under test transmitting message for the test equipment
First propagation delay time on road and for the second link from the equipment under test to the test equipment transmitting message
The second propagation delay time；
Response time determines step, by time difference between the T2 and the T1, with the described first transmission
When extend to that the second propagation delay time sum is poor, the result for obtaining is defined as the response time.
Further, the time synchronized message is accurate time synchronization protocol PTP time synchronized messages.
Further, the change operation is specially：
Stop operation, stop the test equipment and very first time synchronization report is periodically sent to the equipment under test
The behavior of text；Or
Field assignment operation, modification are currently sent to the second time synchronized message of the equipment under test extremely
The value of a few field so that the value of amended at least one field and last time are sent to described tested set
In the second standby time synchronized message, the value of corresponding field is different；
When the change operation is to stop operation, the T1 is the predetermined of the very first time sync message
The transmission time；
When the change operation is field assignment operation, the T1 is sent first for field value is amended
The second time synchronized message the actual transmission time.
Further, change operation to stop operation when described, the very first time sync message is declaration
During Announce messages, in second obtaining step, according to the clock grade in the message for receiving
Clockclass fields and/or clock identify the value of ClockIdentity fields, it is determined that whether the message for receiving
Correctly to respond the response message for changing operation and returning.
Further, when the change operation is field assignment operation, the second time synchronized message is
Declaration Announce messages, at least one field is clock grade Clockclass fields, described the
In two obtaining steps, according to the value of the clock grade Clockclass fields in the message for receiving, it is determined that connecing
Whether the message for receiving is correctly to respond described change to operate the response message for returning.
Further, the test equipment sends the second time synchronized message and the to the equipment under test
Three time synchronized messages, the field assignment operation are the operation for allowing hand over time source.
Further, the second time synchronized message is to declare Announce messages, described at least one
Field is clock grade Clockclass fields, in second obtaining step, according in the message for receiving
Clock grade Clockclass fields and/or clock identify ClockIdentity fields value, it is determined that receiving
Message be whether correctly to respond described to change the response message that operation is returned.
Further, second obtaining step is specially：
In the time of advent of all messages received from equipment under test of record, correct response is extracted described
The time T2 that the response message for changing operation and returning is reached；Or
Judge the message for receiving be correctly respond it is described change the response message that returns of operation after, acquisition
The time T2 that the response message is reached.
Further, first propagation delay time and second propagation delay time be according to the test equipment and
The timestamp recorded in the time synchronized message transmitted between the equipment under test is obtained.
In order to solve above-mentioned technical problem, the embodiment of the present invention also provides a kind of sound of testing time sync message
Device between seasonable, for test equipment end, the device bag of the response time of the testing time sync message
Include：
First acquisition module, enables to equipment under test and responds and return report for obtaining test equipment and performing one
The time of origin T1 of the change operation of text；
Second acquisition module, for obtain it is described be devices under correctly responding described change operation and return
Response message reaches the time T2 of the test equipment；
3rd acquisition module, for obtaining for the test equipment to the of the equipment under test transmitting message
First propagation delay time of one link and for the equipment under test to the second of the test equipment transmitting message
Second propagation delay time of link；
Response time determining module, for by time difference between the T2 and the T1, with described first
Propagation delay time and the second propagation delay time sum are poor, and the result for obtaining is defined as the response time.
Further, the time synchronized message is accurate time synchronization protocol PTP time synchronized messages.
Further, the change operation is specially：
Stop operation, stop the test equipment and very first time synchronization report is periodically sent to the equipment under test
The behavior of text；Or
Field assignment operation, modification are currently sent to the second time synchronized message of the equipment under test extremely
The value of a few field so that the value of amended at least one field and last time are sent to described tested set
In the second standby time synchronized message, the value of corresponding field is different；
When the change operation is to stop operation, the T1 is the predetermined of the very first time sync message
The transmission time；
When the change operation is field assignment operation, the T1 is sent first for field value is amended
The second time synchronized message the actual transmission time.
Further, change operation to stop operation when described, the very first time sync message is declaration
During Announce messages, in second acquisition module, according to the clock grade in the message for receiving
Clockclass fields and/or clock identify the value of ClockIdentity fields, it is determined that whether the message for receiving
Correctly to respond the response message for changing operation and returning.
Further, when the change operation is field assignment operation, the second time synchronized message is
Declaration Announce messages, at least one field is clock grade Clockclass fields, described the
In two acquisition modules, according to the value of the clock grade Clockclass fields in the message for receiving, it is determined that connecing
Whether the message for receiving is correctly to respond described change to operate the response message for returning.
Further, the test equipment sends the second time synchronized message and the to the equipment under test
Three time synchronized messages, the field assignment operation are the operation for allowing hand over time source.
Further, the second time synchronized message is to declare Announce messages, described at least one
Field is clock grade Clockclass fields, in second acquisition module, according in the message for receiving
Clock grade Clockclass fields and/or clock identify ClockIdentity fields value, it is determined that receiving
Message be whether correctly to respond described to change the response message that operation is returned.
Further, second acquisition module is specially：
Extracting sub-module, for record all messages received from equipment under test the time of advent in,
Extraction correctly responds the time T2 that the response message for changing operation and returning is reached；Or
Acquisition submodule, for judging that the message for receiving is correctly to respond the change operation to return
After response message, the time T2 that the response message is reached is obtained.
Further, first propagation delay time and second propagation delay time be according to the test equipment and
The timestamp recorded in the time synchronized message transmitted between the equipment under test is obtained.
In order to solve above-mentioned technical problem, the embodiment of the present invention is also provided in a kind of test equipment, including as above
The device of the response time of the testing time sync message stated.
The above-mentioned technical proposal of the embodiment of the present invention has the beneficial effect that：
In the scheme of the embodiment of the present invention, by by the time difference between the T1 for getting and T2, deducting
First propagation delay time and the second propagation delay time, obtain the response time of the message change operation to test equipment
As a result, response time can so be measured, it is also possible to which the response of equipment is determined by the result of response time
Can, can also be that the malfunction elimination after synchronizing network is disposed and gone wrong does basis, and then PTP can be grasped
Influential effect of the time of message change to time synchronized, has been also convenient for user according to malfunction elimination result to carry
High synchronizing network performance and stability.
Description of the drawings
The step of Fig. 1 is the method for the response time of the testing time sync message of the embodiment of the present invention is illustrated
Figure；
Fig. 2 calculates propagation delay time schematic diagram for the interaction time sync message of the embodiment of the present invention；
Structural representations of the Fig. 3 for the device of the response time of the testing time sync message of the embodiment of the present invention
Figure；
Fig. 4 for the embodiment of the present invention test equipment be devices under a kind of interact sketch；
Fig. 5 interacts sketch with the another kind being devices under for the test equipment of the embodiment of the present invention.
Specific embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attached
Figure and specific embodiment are described in detail.
The embodiment of the present invention cannot test the problem of the response time of PTP messages in being directed to prior art, carry
For a kind of method of the response time of testing time sync message, device and test equipment.
First embodiment
As shown in figure 1, the method for the response time of the testing time sync message, for test equipment end,
Can include：
First obtaining step 11, acquisition test equipment execution one enable to equipment under test and respond and return report
The time of origin T1 of the change operation of text；
It should be noted that above-mentioned change operation refers to that a certain message for being performed to test equipment originally is carried out more
Change, such as change its type, terminate its transmission or change its parameter etc. so that be devices under response above-mentioned
Change.Above-mentioned change operation can cover various situations.
Except above-mentioned change operation need explanation in addition to, for test equipment be devices under being also required to carry out
Illustrate, above-mentioned test equipment and it is above-mentioned be devices under connecting by interfaces such as Ethernet interfaces, using most logical
The Ethernet of communication protocol standard, facilitates the promotion and application of present invention method.
Second obtaining step 12, obtain it is described be devices under correctly responding described change operation and return
Response message reaches the time T2 of the test equipment；
It should be noted that the specific embodiment of the invention can apply 1588 (IEEE, Institute of of IEEE
Electrical and Electronics Engineers, Institute of Electrical and Electric Engineers) agreement, specifically can be with root
According to 1588 agreements of IEEE to the correct response mode of different message defineds whether judging to be devices under
Correct response changes operation.Whether correct so directly can be devices under by the regulation judgement of the agreement
Response changes operation, improves and judges the ageing of response.
3rd obtaining step 13, obtains for the test equipment to the of the equipment under test transmitting message
First propagation delay time of one link and for the equipment under test to the second of the test equipment transmitting message
Second propagation delay time of link；
It should be noted that due to above-mentioned test equipment and it is above-mentioned be devices under between be by a plurality of connection
Line connect, so above-mentioned test equipment master clock port to it is above-mentioned be devices under it is same from the time of clock port
Step message, will have the first propagation delay time Delay1；In the same manner, it is above-mentioned to be devices under from clock port
To the time synchronized message of above-mentioned test equipment master clock port, will also have the second propagation delay time Delay2；
And when the response time to message change operation is calculated, it is only necessary to judge the response time of equipment itself, because
This needs to remove propagation delay time, to improve the accuracy for calculating response time.
With regard to what above-mentioned first propagation delay time and above-mentioned second propagation delay time also needed to illustrate it is：Above-mentioned
One propagation delay time and above-mentioned second propagation delay time, it is possible to use timestamp information or supporting instrument of message etc.
Other supplementary meanss are obtained.For being obtained after propagation delay time using supporting instrument test, can manually by first
Propagation delay time Delay1 and the second propagation delay time Delay2 time delay are configured to test equipment, such realization side
Formula is simple and reliable.
For the above-mentioned mode for obtaining above-mentioned first propagation delay time and above-mentioned second propagation delay time is only illustrated
Illustrate, any other can obtain the mode of above-mentioned first propagation delay time and above-mentioned second propagation delay time, belong to
In the protection domain of the embodiment of the present invention, here differs a citing.
Response time determines step 14, and time difference between the T2 and the T1 is passed with described first
Extend to when defeated that the second propagation delay time sum is poor, the result for obtaining is defined as the response time.
The content of embodiment of the present invention step 14 can be illustrated by formula, and specific formula is：
It is devices under message response time=T2-T1-Delay1-Delay2
In first embodiment of the invention, by the time difference between the T1 that gets and T2, first is deducted
Propagation delay time and the second propagation delay time, obtain the result that the message to test equipment changes the response time of operation,
Realize the measurement of response time.The response time that measurement is obtained can be used for the response performance of judgement equipment,
Malfunction elimination after can also disposing and go wrong for synchronizing network does basis, and utilizes malfunction elimination result
To improve synchronizing network performance.
Second embodiment
For the time synchronized message of first embodiment can be NTP (Network Time Protocol, net
Network time protocol), but as NTP typically can only achieve the timing tracking accuracy of submicrosecond level, it is impossible to meet more
High-precision time synchronized is required, therefore second embodiment of the invention is on the basis of first embodiment, described
Time synchronized message is accurate time synchronization protocol PTP time synchronized messages.
It should be noted that above-mentioned test equipment and it is above-mentioned be devices under between can interact PTP messages.
Wherein the PTP messages can include Sync sync messages, the Delay_Rep latency requests of interaction time stamp
The declaration Announce messages (declaration of message, Delay_Resp time delays response message and carrying time state
Announce message passing time source information) etc. message.
Belong to the message in the network of PTP protocol due to above-mentioned PTP messages, therefore here illustratively PTP
The network of agreement：It is general that the network for applying PTP protocol is referred to as into PTP domains；Have in PTP domains and only have
One synchronised clock, all devices in PTP domains are all synchronous with the clock holding；Node in PTP domains claims
For clock node.
In second embodiment of the invention, as PTP can reach submicrosecond level, higher precision is disclosure satisfy that
Time synchronized require, as well as PTP compare GPS (Global Positioning System, the whole world
Alignment system), PTP possesses lower construction and maintenance cost, can so break away from the dependence to GPS,
Also possesses special meaning in terms of national security.
3rd embodiment
On the basis of first embodiment or second embodiment, described first obtains step to third embodiment of the invention
The change operation in rapid is specially：
Stop operation, stop the test equipment and very first time synchronization report is periodically sent to the equipment under test
The behavior of text；Or
Field assignment operation, modification are currently sent to the second time synchronized message of the equipment under test extremely
The value of a few field so that the value of amended at least one field and last time are sent to described tested set
In the second standby time synchronized message, the value of corresponding field is different；
When the change operation is to stop operation, the T1 is the predetermined of the very first time sync message
The transmission time；
When the change operation is field assignment operation, the T1 is sent first for field value is amended
The second time synchronized message the actual transmission time.
It should be noted that：The above-mentioned test equipment of above-mentioned stopping to above-mentioned equipment under test periodically send first when
Between sync message behavior in periodicity could be arranged to one second；Above-mentioned test equipment is to above-mentioned equipment under test
The behavior for periodically sending very first time sync message can be arranged to above-mentioned test equipment to above-mentioned tested
Equipment is per second to send 8 declaration Announce messages.
As above-mentioned stopping operation is off above-mentioned test equipment to the periodically transmission first of above-mentioned equipment under test
The behavior of time synchronized message, that is, the transmission frequency of message is have adjusted, so can stay to message response
Go out reasonable time, prevent, need response next again
The situation of individual message, can also so improve the accuracy of response.
Also need to herein illustrate the above-mentioned content for stopping operation：Can include that stopping Sync synchronously reporting
The message such as text and declaration Announce messages, is stopping Sync sync messages and declaration Announce messages
Afterwards, can make to be devices under entry time hold mode.
Predetermined transmission time here in for above-mentioned stopping operation is described as follows.Specifically, test equipment note
The original delivery time of the first very first time sync message for stopping sending of record, is designated as above-mentioned T1；Test sets
The standby delivery time that can also record each very first time sync message, and stopping sending very first time synchronization
After message, according to the delivery time of the very first time sync message of record, calculate first stopping and send first
The original delivery time of time synchronized message is simultaneously recorded, and is designated as above-mentioned T1.
In addition except it is above-mentioned stop operation it is a kind of change operation in addition to, also there is another field assignment operation,
Here is illustrated：Above-mentioned field assignment operation can be to change the mass parameter for carrying, and such as change clock
Grade clockclass value.After above-mentioned field assignment operation, can test and be devices under entry time guarantor
Hold the message response time of state；Can also test and be devices under still tracking the time source, time source is not
The message response time for switching；Can also test and be devices under sending out between multichannel PTP time source
The message response time of raw switching.
In third embodiment of the invention, entry time holding shape is devices under by stopping operation to test
The message response time that state is entered, can so test be devices under do not receive the external world message when it is tested
The performance of examination equipment；Or pass through field assignment operation, it is possible to achieve the equipment under test under test various states
Message response time, the message response time for so being obtained by many-side, is the portion of subsequent synchronisation network
Malfunction elimination after affixing one's name to and going wrong is ready, it is also possible to the response performance that evaluation is devices under.
Fourth embodiment
Fourth embodiment of the invention changes operation to stop operation when described on the basis of 3rd embodiment,
When the very first time sync message is declaration Announce messages, in second obtaining step, according to
Clock grade Clockclass fields and/or clock mark ClockIdentity fields in the message for receiving
Value, it is determined that whether the message for receiving is correctly to respond described change to operate the response message for returning.
It should be noted that：The very first time sync message to transmission specified according to 1588 agreements of IEEE
Correct response mode, judges be devices under whether correctly responding very first time sync message.So can be with
Directly judged by the regulation of the agreement, to improve the ageing of judgement.
For 1588 agreements of above-mentioned IEEE, specified according to 1588 agreements of IEEE, when test equipment original
This clock grade Clockclass field values are 6, are devices under clock grade Clockclass fields
When numerical value is 187, fourth embodiment of the invention specifically judges whether being exemplified below for correct response.
Citing one：In the declaration Announce message clock grades that test equipment detection is devices under replying
Clockclass fields, if clock grade Clockclass field values are changed into 187 (due to tested from 6
Measurement equipment is in hold mode, so clock grade Clockclass fields are revised as the field of itself), then
Judgement is devices under correct response change, entry time hold mode.Otherwise, judge to be devices under not
Correct response change.
Citing two：Test equipment detection is devices under the clock mark for replying Announce messages
ClockIdentity fields, if clock identifies clock mark of the ClockIdentity field values by test equipment
Know the clock mark ClockIdentity that ClockIdentity is changed into being devices under, then judge to be devices under
Correct response change, into hold mode.Otherwise, judge to be devices under incorrect response change.
In fourth embodiment of the invention, by stopping operation, and it is declaration in very first time sync message
During Announce messages, according to clock grade Clockclass fields and/or clock in the message for receiving
The value of mark ClockIdentity fields, judges whether correct response, so can just access correct response
Time.If being devices under not responding to or the output response of errored response test equipment, directly output is surveyed
Test result exception, without being tested again, this avoid the test of invalid mistake, improves test
Efficiency, and then obtain effective message response time.
5th embodiment
Fifth embodiment of the invention changes operation for field assignment behaviour when described on the basis of 3rd embodiment
When making, the second time synchronized message is declaration Announce messages, when at least one field is
Clock grade Clockclass field, in second obtaining step, according to clock in the message for receiving etc.
The value of level Clockclass fields, it is determined that whether the message for receiving is correctly to respond the change operation to return
The response message for returning.
It should be noted that:Above-mentioned second time synchronized message includes two：Upper second for having sent
Time synchronized message and it is currently needed for changing the second time synchronized message of field value, but upper one has been sent out
Whether the second time synchronized message for sending there is change, and here is not limited.
In addition, in addition it is also necessary to it is illustrated that：According to 1588 agreements of IEEE specify, when in test equipment it
The numerical value of the clock grade Clockclass fields in the second time synchronized message of front transmission is 6, and is changed
The numerical value of the clock grade Clockclass fields in the second time synchronized message clock afterwards is 7, then only will
In declaration Announce messages, the numerical value of clock grade Clockclass fields is when 6 are changed to 7, tested
Equipment still can track the time source, and time source does not switch.
Fifth embodiment of the invention specifically obtains being exemplified below for T1.
Citing one：The numerical value of clock grade Clockclass fields in declaration Announce messages is changed by 6
For 7, then test equipment records the delivery time of the declaration Announce messages that first Clockclass is 7
For T1, (test equipment records first field values and changes the original delivery time of PTP messages, is designated as
T1)。
Citing two：The delivery time of each declaration Announce message is recorded, first clock etc. is then extracted
Level Clockclass is the delivery time of 7 declaration Announce messages and is designated as T1 (equivalent to test
Equipment records the delivery time of each PTP message, and first field values send and change PTP messages in advance
Delivery time).
For test equipment, the embodiment of the present invention preferably records first field values and changes the time
The default delivery time of sync message, is designated as above-mentioned T1, so without recording each declaration Announce
The delivery time of message, alleviates network load.
For change is sent to after the message being devices under, needs are known for whether the message has correctly
Response, therefore fifth embodiment of the invention specifically judges whether being exemplified below for correct response.
In the declaration Announce messages replied, clock grade Clockclass field values are changed into 7 from 6,
Then judge to be devices under correct response change, otherwise, judgement is devices under incorrect response change.
The fifth embodiment of the present invention, is clock grade Clockclass by changing with least one field
The time synchronized message of field, then subsequently through judging clock grade in the message that receives
The change of the value of Clockclass fields, determines whether it is correct response, so correctly can be rung
Between seasonable.If being devices under not responding to or the output response of errored response test equipment, directly export
Test result exception, without being tested again, this avoid the test of invalid mistake, improves survey
The efficiency of examination, and then obtain effective message response time.
Sixth embodiment
, on the basis of 3rd embodiment, the test equipment is to the equipment under test for sixth embodiment of the invention
The second time synchronized message and the 3rd time synchronized message are sent, the field assignment operation is to cut
Change the operation of time source.
Wherein described test equipment can send the second time synchronized by distinct interface to the equipment under test
Message and the 3rd time synchronized message, the field assignment operation are the operation for allowing hand over time source.
In sixth embodiment of the invention, the test equipment is sent corresponding to different time to the equipment under test
When the second time synchronized message in source and the 3rd time synchronized message, may come in several ways switching time
Source, such as：
It is assumed that other specification of the current time source with another time source in addition to clock grade parameter is identical, and
The clock grade in current time source be A1, and another time source with less than clock grade A1 clock
Grade is B1, now reduces the clock grade A1 in current time source, and it is B1 to be allowed to less than clock grade,
Can then realize that time source switches；Or
It is assumed that other specification of the current time source with another time source in addition to clock priority parameter is identical,
And the clock priority in current time source is A2, and another time source with less than clock priority A2
Clock priority be B2, now reduce the clock priority A2 in current time source, be allowed to less than clock etc.
Level is B2, then can realize that time source switches.
In a word, switching time source can by change some time source selection algorithms using parameter realizing,
Here is not described one by one.
In a kind of concrete implementation mode, when said method is used for PTP protocol, second time synchronized
Message is declaration Announce messages, and at least one field is clock grade Clockclass fields,
In second obtaining step, according to the clock grade Clockclass fields in the message for receiving and/or when
Clock identifies the value of ClockIdentity fields, it is determined that whether the message for receiving is correctly to respond described change to grasp
The response message made and return.
In another kind of concrete implementation mode, when said method is used for PTP protocol, second time is same
Step message and the 3rd time synchronized message are declaration Announce messages, and at least one field is clock
Grade Clockclass field, in second obtaining step, according to the clock grade in the message for receiving
Clockclass fields and/or clock identify the value of ClockIdentity fields, it is determined that whether the message for receiving
Correctly to respond the response message for changing operation and returning.
Said as a example by identifying whether correctly to respond clock source handover operation by clock grade Clockclass fields
It is bright as follows.
Above-mentioned test equipment exports two-way time synchronized message to above-mentioned equipment under test：Second time synchronized message
With the 3rd time synchronized message, the value difference of the clock grade field of the two thus can be by responding report
In text be the clock grade Clockclass fields for carrying above-mentioned 3rd time synchronized message value or carry on
State the value of the clock grade Clockclass fields of the second time synchronized message, it is known that be devices under switching to
Which time source.
Specified according to 1588 agreements of IEEE, when such as the other specification in addition to clock grade parameter is identical, such as
The number of the clock grade Clockclass fields in the second time synchronized message sent before in fruit test equipment
It is worth for 6, and the numerical value of the clock grade Clockclass fields in amended second time synchronized message is
8, the numerical value of the clock grade Clockclass fields in the 3rd time synchronized message clock is 7, then tested
The time source of equipment tracking can switch.
Sixth embodiment of the invention specifically obtains being exemplified below for T1.
Citing one：Test equipment will declare the number of clock grade Clockclass fields in Announce messages
Value is changed to 8 by 6, then test equipment records the declaration that first clock grade Clockclass fields are 8
The delivery time of Announce messages be T1 (test equipment record first field values change PTP report
The original delivery time of text, is designated as T1)；
Citing two：Test equipment can also record the delivery time of each declaration Announce message, extract
First clock grade Clockclass fields are the delivery time of 8 declaration Announce messages and are designated as T1.
For test equipment, the embodiment of the present invention preferably records first field values and changes the time
The default delivery time of sync message, is designated as above-mentioned T1, so without recording each declaration Announce
The delivery time of message, alleviates network load.
For change is sent to after the message being devices under, needs are known for whether the message has correctly
Response, therefore sixth embodiment of the invention specifically judges whether being exemplified below for correct response.
Citing one, if in return Announce messages clock grade Clockclass field values by
6 are changed into 7, then judge to be devices under correct response change, entry time source switching state.Otherwise, sentence
It is disconnected to be devices under incorrect response change.
Citing two, if clock mark ClockIdentity field values in return Announce messages
Another road time is changed into from the clock mark ClockIdentity of the second road time source declaration Announce messages
The clock mark ClockIdentity of source declaration Announce messages, then judge to be devices under correct response
Change, entry time source switching state.Otherwise, judge to be devices under incorrect response change.
The sixth embodiment of the present invention, by judging the clock grade Clockclass words in the message for receiving
The change of the value of section, determines be devices under whether correctly responding the change, and then is correctly responded
Time.If being devices under not responding to or the output response of errored response test equipment, directly output is surveyed
Test result exception, without being tested again, this avoid the test of invalid mistake, improves test
Efficiency, and then obtain effective message response time.
7th embodiment
On the basis of first embodiment, second obtaining step is specially seventh embodiment of the invention：
In the time of advent of all messages received from equipment under test of record, correct response is extracted described
The time T2 that the response message for changing operation and returning is reached；Or
Judge the message for receiving be correctly respond it is described change the response message that returns of operation after, acquisition
The time T2 that the response message is reached.
It should be noted that from the time of advent of all messages received from equipment under test, extracting correct
Response message reach time T2, it is also possible to the meansigma methodss of the time T2 reached by multiple response messages
To calculate T2, the T2 for so calculating is more accurate.
In addition, after correct response message is received, the time T2 that above-mentioned response message is reached is obtained and preserves,
The time of advent of all response messages is preserved so without reserving larger shelf space, space has been saved,
T2 can faster be obtained.
But it is intended to obtain above-mentioned T2, it is necessary first to it is determined that, the report being devices under is sent to changing
Whether Wen Hou, equipment under test have correct response for the message change, therefore seventh embodiment of the invention is concrete
Obtain being exemplified below for correct response time.
Citing one, records the time of advent of each declaration Announce message, and extracts first field values
The due in of correct change PTP messages, is designated as T2 (if being devices under correctly having responded test equipment
The change of output PTP messages, enters hold mode, and test equipment records the arrival of each PTP message
Time).
Citing two, judges that equipment under test is replied PTP messages and correctly responded test equipment output PTP first
After message change, the due in of the reply message is recorded, T2 is designated as.
Citing three, finds the clock grade Clockclass or clock of return Announce messages first
After mark ClockIdentity fields correctly change, the due in of declaration Announce messages is recorded.
Seventh embodiment of the invention, increased the path of various acquisition T2, improve the correct response of acquisition
The accuracy or real-time of time, and then improve Consumer's Experience effect.
8th embodiment
Eighth embodiment of the invention on the basis of first embodiment, first propagation delay time and described second
Propagation delay time is remembered according in the time synchronized message transmitted between the test equipment and the equipment under test
The timestamp of record is obtained.
It should be noted that：Test equipment and it is devices under according to PTP message interaction flow processs, including Sync
Timestamp information in sync message, Delay_Rep latency requests message and Delay_Resp, test set
It is standby to calculate the first propagation delay time Delay1 and the second propagation delay time Delay2 decay time respectively, such as scheme
Shown in 2, especially by timestamp information, the concrete grammar for obtaining propagation delay time is as follows:
Using PTP message interactions, test equipment gets each message time and stabs information, during one-way transmission
Prolong and can be calculated by below equation：
(1) master clock sends Sync sync messages to from clock, and records transmission time t1；Receive from clock
To after the message, reception time t2 is recorded.
(2) from when clockwise master clock send Delay_Rep latency request messages, for initiating reverse transfer
The calculating of time delay, and record transmission time t3；After master clock receives the message, reception time t4 is recorded.
(4), after master clock receives Delay_Rep latency request messages, reply one and carry t4's
Delay_Resp time delay response messages.
Now, just have four timestamps of t1 to t4 from clock, it is possible thereby to calculate master clock,
From the round one-way delay of clock it is
Delay=[(t2-t1)+(t4-t3)]/2
If as shown in Fig. 2 test equipment and the multilink between being devices under are essentially identical, surveyed
First propagation delay time of the examination equipment master clock port to the time synchronized message being devices under from clock port
Delay1=is devices under second from clock port to the time synchronized message of test equipment master clock port
Propagation delay time Delay2.After unidirectional transmission time delay Delay is calculated by message interaction, 2 are multiplied by
Can be obtained by propagation delay time summation.
Eighth embodiment of the invention, by the timestamp information carried in PTP messages, can calculate from
Skew and time delay between clock and master clock, can further measure response time, when adjusting local accordingly
Clock reaches synchronous with master clock, and the synchronous letter of the packet time for sending so can be realized by timestamp
Breath so that data can be replied with correct time sequencing, also improves the accuracy of measurement response time.
9th embodiment
As shown in figure 3, the device of the response time of the testing time sync message of ninth embodiment of the invention,
For test equipment end, wherein, the device of the response time of the testing time sync message includes：
First acquisition module 31, enables to equipment under test and responds and return for obtaining test equipment and performing one
The time of origin T1 of the change operation of return text；
It should be noted that above-mentioned change operation refers to that a certain message for being performed always to test equipment originally enters
Row change, such as changes its type, terminates its transmission or change its parameter etc. so that be devices under response
Above-mentioned change.Above-mentioned change operation can cover various situations.
Except above-mentioned change operation need explanation in addition to, for test equipment be devices under being also required to carry out
Illustrate, above-mentioned test equipment and it is above-mentioned be devices under connecting by interfaces such as Ethernet interfaces, using most logical
The Ethernet of communication protocol standard, facilitates the promotion and application of present invention method.
Second acquisition module 32, for obtain it is described be devices under correctly responding described change operation and return
The response message for returning reaches the time T2 of the test equipment；
It should be noted that IEEE 1588 (IEEE, Institute can be applied in the specific embodiment of the invention
Of Electrical and Electronics Engineers, Institute of Electrical and Electric Engineers) agreement, specifically can be with
According to IEEE 1588 (IEEE, Institute of Electrical and Electronics Engineers, electrically and
Electronic Engineering Association) agreement judges to be devices under to be to the correct response mode of different message defineds
No correct response changes operation.So directly can judge whether to be just devices under by the regulation of the agreement
Really response changes operation, improves and judges the ageing of response.
3rd acquisition module 33, for obtaining for the test equipment to the equipment under test transmitting message
The first link the first propagation delay time and for the equipment under test to the test equipment transmitting message
Second propagation delay time of the second link；
It should be noted that due to above-mentioned test equipment and it is above-mentioned be devices under between be by a plurality of connection
Line connect, so above-mentioned test equipment master clock port to it is above-mentioned be devices under it is same from the time of clock port
Step message, will have the first propagation delay time Delay1；In the same manner, it is above-mentioned to be devices under from clock port
To the time synchronized message of above-mentioned test equipment master clock port, will also have the second propagation delay time Delay2；
And when the response time to message change operation is calculated, it is only necessary to judge the response time of equipment itself, because
This needs to remove propagation delay time, to improve the accuracy for calculating response time.
With regard to what above-mentioned first propagation delay time and above-mentioned second propagation delay time also needed to illustrate it is：Above-mentioned
One propagation delay time and above-mentioned second propagation delay time, it is possible to use timestamp information or supporting instrument of message etc.
Other supplementary meanss are obtained.For being obtained after propagation delay time using supporting instrument test, can manually by first
Propagation delay time Delay1 and the second propagation delay time Delay2 time delay are configured to test equipment, such realization side
Formula is simple and reliable.
But for the above-mentioned mode for obtaining above-mentioned first propagation delay time and above-mentioned second propagation delay time is only
Illustrate, any other can obtain the mode of above-mentioned first propagation delay time and above-mentioned second propagation delay time,
Belong to the protection domain of the embodiment of the present invention, here differs a citing.
Response time determining module 34, for by time difference between the T2 and the T1, with described
One propagation delay time and the second propagation delay time sum are poor, and the result for obtaining is defined as the response time.
The content of the response time determining module 34 of the embodiment of the present invention is illustrated by formula, specifically
Formula is：
It is devices under message response time=T2-T1-Delay1-Delay2
In ninth embodiment of the invention, by the time difference between the T1 that gets and T2, first is deducted
Propagation delay time and the second propagation delay time, obtain the result that the message to test equipment changes the response time of operation,
Realize the measurement of response time.The response time that measurement is obtained can be used for the response performance of judgement equipment,
Malfunction elimination after can also disposing and go wrong for synchronizing network does basis, and utilizes malfunction elimination result
To improve synchronizing network performance.
It should be noted that when the device that the present invention is provided is the response using above-mentioned testing time sync message
Between method device, then all embodiments of the method for the response time of above-mentioned testing time sync message are equal
Suitable for the device, and can reach same or analogous beneficial effect.
The response time of testing time sync message of the tenth embodiment of the invention on the basis of the 9th embodiment
Device in, the time synchronized message be accurate time synchronization protocol PTP time synchronized messages.
Testing time sync message of the eleventh embodiment of the invention on the basis of the 9th or the tenth embodiment
In the device of response time, the change operation is specially：
Stop operation, stop the test equipment and very first time synchronization report is periodically sent to the equipment under test
The behavior of text；Or
Field assignment operation, modification are currently sent to the second time synchronized message of the equipment under test extremely
The value of a few field so that the value of amended at least one field and last time are sent to described tested set
In the second standby time synchronized message, the value of corresponding field is different；
When the change operation is to stop operation, the T1 is the predetermined of the very first time sync message
The transmission time；
When the change operation is field assignment operation, the T1 is sent first for field value is amended
The second time synchronized message the actual transmission time.
The response of testing time sync message of the twelveth embodiment of the invention on the basis of the 11st embodiment
In the device of time, change operation to stop operation when described, the very first time sync message is declaration
During Announce messages, in second acquisition module, according to the clock grade in the message for receiving
Clockclass fields and/or clock identify the value of ClockIdentity fields, it is determined that whether the message for receiving
Correctly to respond the response message for changing operation and returning.
The response of testing time sync message of the thriteenth embodiment of the invention on the basis of the 11st embodiment
In the device of time, when the change operation is field assignment operation, the second time synchronized message is
Declaration Announce messages, at least one field is clock grade Clockclass fields, described the
In two acquisition modules, according to the value of the clock grade Clockclass fields in the message for receiving, it is determined that connecing
Whether the message for receiving is correctly to respond described change to operate the response message for returning.
The response of testing time sync message of the fourteenth embodiment of the invention on the basis of the 11st embodiment
In the device of time, the test equipment sends the second time synchronized message and the to the equipment under test
Three time synchronized messages, the field assignment operation are the operation for allowing hand over time source.
Wherein described second time synchronized message is declaration Announce messages, and at least one field is
Clock grade Clockclass fields, in second acquisition module, according to the clock in the message for receiving
Grade Clockclass field and/or clock identify the value of ClockIdentity fields, it is determined that the message for receiving
Whether it is correctly to respond described change to operate the response message for returning.
Further, when said apparatus are used for PTP protocol, the second time synchronized message and the 3rd time are same
Step message is declaration Announce messages, and at least one field is clock grade Clockclass fields,
In second acquisition module, according to the clock grade Clockclass fields in the message for receiving and/or when
Clock identifies the value of ClockIdentity fields, it is determined that whether the message for receiving is correctly to respond described change to grasp
The response message made and return.
During the response of testing time sync message of the fifteenth embodiment of the invention on the basis of the 9th embodiment
Between device in, second acquisition module is specially：
Extracting sub-module, for record all messages received from equipment under test the time of advent in,
Extraction correctly responds the time T2 that the response message for changing operation and returning is reached；Or
Acquisition submodule, for judging that the message for receiving is correctly to respond the change operation to return
After response message, the time T2 that the response message is reached is obtained.
During the response of testing time sync message of the sixteenth embodiment of the invention on the basis of the 9th embodiment
Between device in, first propagation delay time and second propagation delay time are according to the test equipment and institute
The timestamp recorded in stating the time synchronized message transmitted between equipment under test is obtained.
In order to measure response time, seventeenth embodiment of the invention also provides a kind of test equipment, including
The device of the response time of testing time sync message described above.
As shown in figure 4, test equipment and be devices under by the interfaces such as Ethernet interface connect, with survey
Examination equipment and interaction PTP messages between being devices under, an interface of test equipment are connect as master clock
Mouthful and be devices under interacting PTP messages, another interface as from clock interface and be devices under hand over
Mutual PTP messages；In addition, for the direction of arrow in Fig. 4 also needs to illustrate, the direction of arrow is
Refer to that master clock interface is pointed to from the direction (rather than sending direction of PTP messages) of clock interface, and PTP
Message can pass through the connection mutual message between Ethernet interface.
As shown in figure 5, test equipment and be devices under by the interfaces such as Ethernet interface connect, with survey
Examination equipment and interaction PTP messages between being devices under, two interfaces of test equipment are as master clock
To being devices under sending PTP messages, the 3rd interface is used as from clock interface and being devices under for interface
Interaction PTP messages；In addition, for the direction of arrow in Fig. 5 also needs to illustrate, the direction of arrow
Refer to that master clock interface is pointed to from the direction (rather than sending direction of PTP messages) of clock interface, and PTP
Message can pass through the connection mutual message between Ethernet interface.
The device of the response time of the corresponding testing time sync message due to the embodiment of the present invention, is applied to
Test equipment, therefore, the embodiment of the present invention additionally provides a kind of test equipment, wherein, the above-mentioned testing time
The embodiment that embodiment is realized suitable for the test equipment of the device of the response time of sync message
In, can also reach identical technique effect.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (19)
1. a kind of method of the response time of testing time sync message, for test equipment end, its feature
It is that the method for the response time of the testing time sync message includes：
First obtaining step, obtains test equipment and performs one and enable to equipment under test response returned packet
Change the time of origin T1 of operation；
Second obtaining step, obtains and described is devices under correctly responding the response for changing operation and return
Message reaches the time T2 of the test equipment；
3rd obtaining step, obtains the first chain to the equipment under test transmitting message for the test equipment
First propagation delay time on road and for the second link from the equipment under test to the test equipment transmitting message
The second propagation delay time；
Response time determines step, by time difference between the T2 and the T1, with the described first transmission
When extend to that the second propagation delay time sum is poor, the result for obtaining is defined as the response time.
2. the method for the response time of testing time sync message according to claim 1, its feature
It is that the time synchronized message is accurate time synchronization protocol PTP time synchronized messages.
3. the method for the response time of testing time sync message according to claim 1 and 2, its
It is characterised by, the change operation is specially：
Stop operation, stop the test equipment and very first time synchronization report is periodically sent to the equipment under test
The behavior of text；Or
Field assignment operation, modification are currently sent to the second time synchronized message of the equipment under test extremely
The value of a few field so that the value of amended at least one field and last time are sent to described tested set
In the second standby time synchronized message, the value of corresponding field is different；
When the change operation is to stop operation, the T1 is the predetermined of the very first time sync message
The transmission time；
When the change operation is field assignment operation, the T1 is to be sent after field value is changed first
The actual transmission time of the second time synchronized message.
4. the method for the response time of testing time sync message according to claim 3, its feature
It is to change operation to stop operation when described, the very first time sync message is declaration Announce
During message, in second obtaining step, according to the clock grade Clockclass words in the message for receiving
Section and/or clock identify the value of ClockIdentity fields, it is determined that whether the message for receiving is correct response
The response message for changing operation and returning.
5. the method for the response time of testing time sync message according to claim 3, its feature
It is that, when the change operation is field assignment operation, the second time synchronized message is declaration
Announce messages, at least one field are clock grade Clockclass fields, and described second obtains
Take in step, according to the value of the clock grade Clockclass fields in the message for receiving, it is determined that receiving
Message be whether correctly to respond described to change the response message that operation is returned.
6. the method for the response time of testing time sync message according to claim 3, its feature
It is that the test equipment sends the second time synchronized message to the equipment under test and the 3rd time is same
Step message, the field assignment operation is the operation for allowing hand over time source.
7. the method for the response time of testing time sync message according to claim 6, its feature
It is that the second time synchronized message is declaration Announce messages, when at least one field is
Clock grade Clockclass field, in second obtaining step, according to clock in the message for receiving etc.
Level Clockclass fields and/or clock identify the value of ClockIdentity fields, it is determined that the message for receiving is
The no response message returned correctly to respond the change operation.
8. the method for the response time of testing time sync message according to claim 1, its feature
It is that second obtaining step is specially：
In the time of advent of all messages received from equipment under test of record, correct response is extracted described
The time T2 that the response message for changing operation and returning is reached；Or
Judge the message for receiving be correctly respond it is described change the response message that returns of operation after, acquisition
The time T2 that the response message is reached.
9. the method for the response time of testing time sync message according to claim 1, its feature
It is that first propagation delay time and second propagation delay time are according to the test equipment and described tested
The timestamp recorded in the time synchronized message transmitted between equipment is obtained.
10. a kind of device of the response time of testing time sync message, for test equipment end, its feature
It is that the device of the response time of the testing time sync message includes：
First acquisition module, enables to equipment under test and responds and return report for obtaining test equipment and performing one
The time of origin T1 of the change operation of text；
Second acquisition module, for obtain it is described be devices under correctly responding described change operation and return
Response message reaches the time T2 of the test equipment；
3rd acquisition module, for obtaining for the test equipment to the of the equipment under test transmitting message
First propagation delay time of one link and for the equipment under test to the second of the test equipment transmitting message
Second propagation delay time of link；
Response time determining module, for by time difference between the T2 and the T1, with described first
Propagation delay time and the second propagation delay time sum are poor, and the result for obtaining is defined as the response time.
The device of the response time of 11. testing time sync messages according to claim 10, which is special
Levy and be, the time synchronized message is accurate time synchronization protocol PTP time synchronized messages.
The device of the response time of the 12. testing time sync messages according to claim 10 or 11,
Characterized in that, the change operation is specially：
Stop operation, stop the test equipment and very first time synchronization report is periodically sent to the equipment under test
The behavior of text；Or
Field assignment operation, modification are currently sent to the second time synchronized message of the equipment under test extremely
The value of a few field so that the value of amended at least one field and last time are sent to described tested set
In the second standby time synchronized message, the value of corresponding field is different；
When the change operation is to stop operation, the T1 is the predetermined of the very first time sync message
The transmission time；
When the change operation is field assignment operation, the T1 is sent first for field value is amended
The second time synchronized message the actual transmission time.
The device of the response time of 13. testing time sync messages according to claim 12, which is special
Levy and be, change operation to stop operation when described, the very first time sync message is declaration Announce
During message, in second acquisition module, according to the clock grade Clockclass words in the message for receiving
Section and/or clock identify the value of ClockIdentity fields, it is determined that whether the message for receiving is correct response
The response message for changing operation and returning.
The device of the response time of 14. testing time sync messages according to claim 12, which is special
Levy and be, when the change operation is field assignment operation, the second time synchronized message is declaration
Announce messages, at least one field are clock grade Clockclass fields, and described second obtains
In delivery block, according to the value of the clock grade Clockclass fields in the message for receiving, it is determined that receiving
Message be whether correctly to respond described to change the response message that operation is returned.
The device of the response time of 15. testing time sync messages according to claim 12, which is special
Levy and be, the test equipment sends the second time synchronized message and the 3rd time to the equipment under test
Sync message, the field assignment operation are the operation for allowing hand over time source.
The method of the response time of 16. testing time sync messages according to claim 15, which is special
Levy and be, the second time synchronized message is declaration Announce messages, at least one field is
Clock grade Clockclass fields, in second acquisition module, according to the clock in the message for receiving
Grade Clockclass field and/or clock identify the value of ClockIdentity fields, it is determined that the message for receiving
Whether it is correctly to respond described change to operate the response message for returning.
The device of the response time of 17. testing time sync messages according to claim 10, which is special
Levy and be, second acquisition module is specially：
Extracting sub-module, for record all messages received from equipment under test the time of advent in,
Extraction correctly responds the time T2 that the response message for changing operation and returning is reached；Or
Acquisition submodule, for judging that the message for receiving is correctly to respond the change operation to return
After response message, the time T2 that the response message is reached is obtained.
The device of the response time of 18. testing time sync messages according to claim 10, which is special
Levy and be, first propagation delay time and second propagation delay time are according to the test equipment and the quilt
The timestamp recorded in the time synchronized message transmitted between measurement equipment is obtained.
19. a kind of test equipments, it is characterised in that include such as above-mentioned any one of claim 10 to 18 institute
The device of the response time of the testing time sync message stated.
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