CN101022373A - System, method and apparatus for testing long-distance frame time delay - Google Patents
System, method and apparatus for testing long-distance frame time delay Download PDFInfo
- Publication number
- CN101022373A CN101022373A CNA2007100799832A CN200710079983A CN101022373A CN 101022373 A CN101022373 A CN 101022373A CN A2007100799832 A CNA2007100799832 A CN A2007100799832A CN 200710079983 A CN200710079983 A CN 200710079983A CN 101022373 A CN101022373 A CN 101022373A
- Authority
- CN
- China
- Prior art keywords
- test frame
- time
- sequence information
- module
- transmitting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
A method for testing time delay of remote frame can provide high accurate clock system to ensure high accurate clock and common time basis required by service time delay test of trans-regional communication network and to ensure long period of stability for clock system on each individual test instrument as well as to ensure clock accuracy required by user and used between multi-set test instrument when test of service time delay on tested communication network or tested communication device is carried out.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of system and method and device of testing long-distance frame time delay.
Background technology
Extensive use along with communication equipment, communication service, in communication equipment manufacturing field and communication service operation field, the Qos (service quality) of communication equipment and communication network and the accurate measurement and the assessment of performance index (as throughput) are also become more and more important, wherein service delay (Service Delay) index seems especially crucial for voice, the video traffic based on the IP carrying of present rapid growth.
In the prior art, have two kinds of technical schemes that the communication network service time delay is tested usually:
First kind of technical scheme be the measuring accuracy requirement than higher test in, the external reference clock access interface that externally provides by existing tester, equipment such as the rubidium frequency standard of access test macro outside, GPS frequency marking, utilize these equipment to provide high-precision reference clock system for the test service time delay, thus the precision of delaying time when improving test service.The defective of this technical scheme is: adopt costing an arm and a leg of commercial rubidium frequency standard, these equipment of GPS frequency marking, improved testing cost; Even if adopt the commercial equipment as rubidium frequency standard, GPS frequency marking, still can't solve the common clock reference problem when strange land communication network or communication equipment tested; In addition, this technical scheme does not provide test yet, measures incorporate solution, and time-delay needs networking to install, proofread and correct comparatively loaded down with trivial details during test service, takes time and effort.
What second kind of technical scheme adopted is the IEEE.1588 technology, the IEEE.1588 technology is a kind of local area network technology, adopt comparatively complicated communication protocol, the timestamp tracking technique that cooperates bottom hardware to provide, preferably settling time benchmark problem, according to the disclosed test data of industry, the error range that IEEE.1588 can make in the local area network (LAN) time reference between two surveying instruments+/-100ns within.Though this technical scheme relies on ethernet network to implement clock synchronization protocol, but its test frame that carries timestamp can't be crossed over three layers of switching network, therefore can't realize remote delay testing, and if can not realize telemeasurement, for the Qos test of voice, video with meaningless; In addition, it is ripe that the IEEE.1588 technology uses at present that is that all right, realizes the Ethernet PHY layer chip of this Technology Need special use, and described Ethernet PHY layer chip supported the interpolation and the extraction of synchronizing information (Sync information) timestamp; But also do not have at present the ripe IEEE.1588 commercial chip of using, have, the clock synchronization protocol more complicated of using when adopting this technical scheme is for the realization of this technical scheme also brings suitable difficulty.
From above content as can be seen, prior art is difficult to satisfy the requirement that the service delay of cross-region, large-scale communication network is tested, even if communication network or the communication equipment among a small circle carried out the test of service delay, also exist the testing cost height, need carry out networking to each test assignment and install, proofread and correct comparatively loaded down with trivial details, take time and effort and complicated communication protocol is difficult to problems such as realization.
Summary of the invention
Embodiments of the invention provide a kind of system and method and device of testing long-distance frame time delay, solve the satisfied requirement that the service delay of cross-region, large-scale communication network is tested that is difficult to that exists in the prior art.
Embodiments of the invention are to be achieved through the following technical solutions:
A kind of system of testing long-distance frame time delay, described system comprise timing parameter acquisition module, test frame generation module and test frame analysis module,
Timing parameter acquisition module: be arranged at the receiving terminal and the transmitting terminal of test frame, be used for pulse signal, the timing parameter that generation system needs according to its satellites transmits that receives;
Test frame generation module: be arranged at the transmitting terminal of test frame, be used for timing parameter, generate the test frame that carries the transmitting time sequence information, described test frame is sent to the test frame analysis module according to the timing parameter acquisition module generation that is arranged at transmitting terminal;
Test frame analysis module: be arranged at the receiving terminal of test frame, be used to receive the test frame of described test frame generation module, analyze described test frame, obtain the transmitting time sequence information that carries in the described test frame to its transmission; Timing parameter according to the timing parameter acquisition module that is arranged at receiving terminal generates produces the time of reception sequence information that receives described test frame; According to described transmitting time sequence information and time of reception sequence information, the test test frame is by the time delay of tested communication network.
A kind of method of testing long-distance frame time delay, described method comprises:
At the transmitting terminal and the receiving terminal of test frame, according to the pulse signal of the satellites transmits that receives, the timing parameter that generation system needs;
Described timing parameter according to transmitting terminal generates generates the test frame that carries the transmitting time sequence information, sends described test frame;
At the receiving terminal of test frame, receive described test frame to its transmission, analyze described test frame, obtain the transmitting time sequence information that carries in the described test frame; Described timing parameter according to receiving terminal generates produces the time of reception sequence information that receives described test frame; According to described time of reception sequence information and time of reception sequence information, the test test frame is by the time delay of tested communication network.
A kind of device of testing long-distance frame time delay, described device comprise test frame generation module and test frame analysis module,
The test frame generation module is used for the timing parameter that receives according to it, generates the test frame that carries the transmitting time sequence information, by tested communication network, sends to the test frame analysis module;
The test frame analysis module is used to receive described test frame, according to its timing parameter that receives, generates the time of reception sequence information that receives described test frame; The test frame analysis module is resolved described test frame, obtains the transmitting time sequence information that carries in the described test frame, according to time of reception sequence information and described transmitting time sequence information, calculates the time delay of described test frame by tested communication network;
Described timing parameter is to produce according to the pulse signal of satellites transmits.
The technical scheme that is provided by the embodiment of the invention described above as can be seen, embodiments of the invention provide a kind of system and method and device of testing long-distance frame time delay, at the test of the service delay of tested communication equipment or tested communication network, provide the integrative solution of high precision clock system; Needed high precision clock and common time reference when having guaranteed the service delay of the communication network of cross-region tested, guarantee the long-term stability of the clock system of single tester, also guarantee between many testers, particularly cross-region, the clock accuracy when applied environment differs greatly still can satisfy communication network is carried out service delay when testing, and the user is to the requirement of clock accuracy.
Description of drawings
The system of the testing long-distance frame time delay that the cover that Fig. 1 provides for the embodiment of the invention is complete;
When not overflowing, calculates the time serial message that Fig. 2 provides for the embodiment of the invention schematic diagram of test frame propagation delay time;
When overflowing, calculates the time serial message that Fig. 3 provides for the embodiment of the invention schematic diagram of test frame propagation delay time.
Embodiment
For the ease of understanding the technical scheme that the embodiment of the invention provides, at first introduce when testing on a large scale, striding the communication network service of geographic area and delay time, the requirement of communications equipment manufacturer, communication service operator, this is to need accurately to measure this technical indicator of service delay because of communications equipment manufacturer, communication service operator, for the selection of equipment, the optimization of network topology wiring provide guidance, the service delay of being mentioned refers to such an extent that be the propagation delay time of remote frame on tested communication network or communication equipment here.
Generally speaking, carry out the test of service delay, have following requirement usually at striding the geographic area on a large scale:
One, test very high to the required precision of clock system: the test request tester clock accuracy at core net, full-time clock Synchronization Network will be higher than 1～2 grade of system under test (SUT) at least in a large number;
Two, at the test of communication network cross-region, large-scale, need on cross-region, remote basis, set up the clock system of precise synchronization, also need clock system to possess common time reference.
Three, generally speaking, cross-region, large scale test can face the variation of the clock system precision that tester clock system individual difference, high/low temperature applied environment difference and long-play bring, eliminating or reduce the error that this variation is delayed time and caused when test service, is the problem that must consider when the clock system of design of communications tester.
Next, the technical scheme that the embodiment of the invention is provided describes:
The system of the testing long-distance frame time delay that the embodiment of the invention provides comprises timing parameter acquisition module, test frame generation module and test frame analysis module, transmitting terminal and receiving terminal at test frame are provided with the timing parameter acquisition module, described timing parameter acquisition module comprises clock reference base modules, clock signal module and time reference processing module, the test frame generation module is arranged at the transmitting terminal of test frame, and the test frame analysis module is arranged at the receiving terminal of test frame; Can also comprise compensating module in the described system that the embodiment of the invention provides, be used for when the test frame analysis module detects transmitting time sequence information and/or time of reception sequence information and overflows, compensate the corresponding time series cycle, and notice test frame analysis module is by the time delay of the described time series computation of Period test frame of compensation; Wherein,
The clock reference base modules is used for the pulse signal according to its satellites transmits that receives, and generates the high precision clock base reference signal, for clock signal module and time reference processing module provide accurate, synchronous high precision clock reference signal;
The clock signal module, the high precision clock base reference signal that provides according to the clock reference base modules is provided, generate high accurate clock signal, the temporal information that guarantees transmitting terminal and receiving terminal has the common clock cycle, for sending and the time of acceptance test frame provides accurate, synchronous digit, this digit is the clock cycle of high accurate clock signal;
The time reference processing module, be used for detecting the high precision clock base reference signal that the clock reference base modules provides at predetermined instant, the rise time reference signal, the clock system that guarantees described transmitting terminal and receiving terminal possesses accurate, synchronous time reference benchmark, for sending and the time of acceptance test frame provides accurate, synchronous counting starting point;
At transmitting terminal, the test frame generation module is according to the high accurate clock signal of clock signal module generation and the time reference signal of time reference processing module generation, generation carries the test frame of transmitting time sequence information, described test frame is sent to the receiving terminal of described test frame;
At receiving terminal, the test frame analysis module receives the test frame of described test frame generation module to its transmission, analyze described test frame, obtain the transmitting time sequence information that carries in the described test frame, simultaneously according to the high accurate clock signal of clock signal module generation and the time reference signal of time reference processing module generation, produce the time of reception sequence information that receives described test frame, according to described transmitting time sequence information and time of reception sequence information, the test test frame is by the time delay of tested communication network.
Described clock reference base modules can be the GPS receiver module, also can be Russian Glonass receiving card or double star receiving card; Described clock signal module can be phase-locked loop module, also can be other the module that generates the high accurate clock signal function that possesses; Described test frame is the remote frame by tested communication network, and the communication network of network layout above 100 meters all can be tested communication network.
Below in conjunction with accompanying drawing, the technical scheme of the testing long-distance frame time delay that the embodiment of the invention is provided is described in detail:
The system of the testing long-distance frame time delay that the cover that Fig. 1 provides for the embodiment of the invention is complete, comprise the GPS receiver module, phase-locked loop module, the time reference processing module, the very first time is stabbed generation module, the test frame sending module, the second timestamp generation module, the acquisition module of transmitting time sequence information and delay testing module, this embodiment adopts the clock reference base modules in the testing long-distance frame time delay system that the GPS receiver module provides as the embodiment of the invention, clock signal module in the testing long-distance frame time delay system that phase-locked loop module provides as the embodiment of the invention, the very first time stabs generation module and test frame sending module and has constituted test frame generation module in the testing long-distance frame time delay system that the embodiment of the invention provides, the second timestamp generation module, the acquisition module of transmitting time sequence information and delay testing module have constituted the test frame analysis module in the testing long-distance frame time delay system that the embodiment of the invention provides.
As shown in Figure 1, the transmitting terminal of test frame and receiving terminal are provided with GPS receiver module (also can be referred to as gps receiver), phase-locked loop module and time reference processing module; The GPS receiver module is built in the system, utilizes the good characteristic of 1PPS pulse signal of the satellites transmits that receives of gps receiver, as steady in a long-term, performance is good etc., for phase-locked loop module provides good clock reference benchmark; Phase-locked loop module among Fig. 1 is generally selected constant temperature VCXO device for use, and this is because constant temperature VCXO device can provide short-term stability, excellent performance, all good clock signal of index and precision index of making an uproar mutually.
When phase-locked loop module was selected constant temperature VCXO device for use, gps receiver can be to constant temperature VCXO device because life-span frequency departure aging, that applied environment difference causes compensates correction.
The time reference processing module detects the 1PPS pulse signal of gps receiver output at predetermined instant, and according to this pulse signal output time reference signal, described time reference signal is used for determine sending and two places (being the transmitting terminal and the receiving terminal of the remote frame) clock system of acceptance test frame synchronous, this is because gps receiver is when providing well behaved pps pulse per second signal, the Greenwich Mean Time information of standard can also be provided, be arranged at the receiving terminal of remote frame and the gps receiver of transmitting terminal respectively, the 1PPS pps pulse per second signal that receives according to predetermined instant (Greenwich Mean Time), the phase-locked loop module and the time reference processing module that are respectively two ends provide accurate clock reference reference signal, described phase-locked loop module and time reference processing module generate high accurate clock signal and time reference signal respectively according to described clock reference reference signal; Described predetermined instant determines that according to the time reference information of the predetermined instant of time reference processing module configured in advance described time reference information is determined by the predetermined reference clock datum mark of upper layer communication agreement according to transmitting terminal and receiving terminal.
Here need to prove: when the select time benchmark, the 1PPS pulse signal of gps receiver output also has certain phase difference, this phase difference also can bring the error of two places time reference, since this phase difference generally can be controlled in nanoscale (as the 1PPS phase difference of M12+GPS module output just+/-100ns within), service delay for general ip data service microsecond even Millisecond, in fact the error that this phase difference brings very little, meets test request fully.In addition, also can by some collimation techniques or more the high accurate GPS receiver module further reduce the error that phase difference brings.
The test frame generation module comprises very first time stamp generation module and test frame sending module, the test frame analysis module comprises the second timestamp generation module, the acquisition module of transmitting time sequence information and delay testing module, promptly at the receiving terminal and the transmitting terminal of test frame, be provided with the timestamp generation module, the timestamp generation module produces the time serial message that uses for test, what described time serial message was represented is to be the counting starting point with the time reference signal, with high accurate clock signal clock cycle tail digit count results, this count results can be the binary number of a designated length (as 32bit), also can be the hexadecimal number or the octal number of a designated length, with the variation increasing or decreasing of reference clock signal clock cycle quantity.
The very first time that is arranged at the test frame generation module is stabbed the transmitting time sequence information that generation module is used to generate the transmission test frame, and what described transmitting time sequence information was represented is the time serial message that transmitting terminal produces when sending test frame; The second timestamp generation module that is arranged at the test frame analysis module is used to generate the time of reception sequence information, and what described time of reception sequence information was represented is the time serial message that receiving terminal produces when the acceptance test frame; Because the clock signal of the time serial message of receiving terminal and transmitting terminal has been set to synchronizing clock signals, the time series Base Serial Number reference at two ends also be common time reference signal, so transmitting time sequence information and time of reception sequence information also are synchronous;
This is at synchronization because of two ends, the 1PPS pps pulse per second signal that receives according to gps receiver, for phase-locked loop module and time reference processing module provide accurate clock reference reference signal, phase-locked loop module generates high accurate clock signal according to described clock reference reference signal; The time reference processing module is according to described clock reference reference signal, rise time reference signal; Because the 1PPS pps pulse per second signal that the gps receiver of receiving terminal and transmitting terminal receives is satellite transmission, the pps pulse per second signal of synchronization, therefore the high accurate clock signal that lays respectively at the phase-locked loop module generation of receiving terminal and transmitting terminal is a synchronizing signal, the time reference signal that lays respectively at the time reference processing module generation of receiving terminal and transmitting terminal also is synchronizing signal, described transmitting time sequence information is identical with the clock cycle of time of reception sequence information, it is digit, in addition, the counting starting point of described transmitting time sequence information and time of reception sequence information is identical, therefore can be directly according to described transmitting time sequence information and time of reception sequence information, the calculating remote frame is the time delay of test frame by the propagation delay time of tested communication network.
The test frame sending module is arranged at the transmitting terminal of test frame, it can be according to different testing requirements, generation has test frame different characteristic, that carry the transmitting time sequence information, by tested communication network, sends this test frame to the test frame analysis module;
The test frame analysis module is arranged at the receiving terminal of test frame, by tested communication network acceptance test frame, analyzes described test frame, obtains the transmitting time sequence information that carries in the described test frame; Timing parameter according to the timing parameter acquisition module that is arranged at receiving terminal generates produces the time of reception sequence information that receives described test frame; According to described transmitting time sequence information and time of reception sequence information, the test test frame is by the time delay of tested communication network.
The second timestamp generation module that is arranged in the test frame analysis module generates the time of reception sequence information that receives described test frame, sends described time of reception sequence information to the delay testing module;
The acquisition module that is arranged at the transmitting time sequence information in the test frame analysis module is analyzed this test frame, extracts the transmitting time sequence information that carries in this test frame, sends described transmitting time sequence information to the delay testing module;
Be arranged at delay testing module in the test frame analysis module according to described transmitting time sequence information and described time of reception sequence information, calculate and obtain the propagation delay time of this test frame on tested communication network.
When the test frame analysis module detects transmitting time sequence information and/or time of reception sequence information and overflows, solve the described problem that time series is overflowed by compensating module compensation regular hour sequence period usually.Need to prove at this, clearly do not provide compensating module among Fig. 1.
Usually when calculating the propagation delay time of test frame by tested communication network, at first need the judgement time sequence information whether to overflow, this be since time serial message represent be with the time reference signal be the counting starting point, clock cycle with high accurate clock signal is the count results of digit, this count results can be the binary number of a designated length, that is to say that time serial message can be the binary number of a finite length, can generation overflow after certain numerical value with the reference clock increasing or decreasing, such as with the 100MHz clock as the reference clock, if the length of time serial message is 32bit, so with if be starting point with the time reference signal, with 10
-8S is a digit, is counting up to 2
32(be timing 42.9=2
32* 10
-8Second) after, this time series will be overflowed, and promptly this time series need start anew to count; Delay time when therefore calculating test frame, need detection time of reception sequence information and transmitting time sequence information whether to overflow, increasing progressively with time serial message is example, when time of reception sequence during less than the transmitting time sequence, can determine this test frame in transmission course, the time series at two ends is overflowed.
Therefore when calculating test frame, delay time, whether overflow, can be divided into two kinds of situations and handle according to time serial message:
Figure 2 shows that the schematic diagram that calculates the test frame propagation delay time when time serial message that the embodiment of the invention provides does not overflow; As shown in Figure 2, when determining that time serial message does not overflow, contrast transmitting time sequence information and time of reception sequence information, the two subtracts each other, and can draw the propagation delay time of this test frame on data communication network; Can adopt following computing formula to represent:
T(delay)＝T(receive)-T(transmit)
Wherein, the propagation delay time of T (delay) expression test frame, unit is that time series increases progressively cycle unit, as reference 10MHz clock, unit is 100ns; The time serial message of T (receive) expression receiving terminal acceptance test frame, unit is that timestamp increases progressively cycle unit; The transmitting time sequence information that T (transmit) expression test frame comprises, unit is that timestamp increases progressively cycle unit.
Figure 3 shows that the schematic diagram that calculates the test frame propagation delay time when time serial message that the embodiment of the invention provides overflows; As shown in Figure 3, when determining that time serial message overflows, need also to determine what cycles time serial message has overflowed, and the cycle of mentioning refers to 2 here
nN is the value of the designated length of time serial message, compare complexity like this, implement also relatively more difficult, owing to consider that the propagation delay time of general Frame on tested communication network is far smaller than 42.9 seconds, therefore, the problem that can overflow by that introduce below, fixing mode processing time sequence of test frame analysis module:
Specifying n is 32, increasing progressively with clock with time series is example, at the time of reception sequence information less than the transmitting time sequence information, determine that promptly test frame is in transmission course, when time of reception sequence information and transmitting time sequence information overflow, to the test frame that overflows, the computing formula below adopting is carried out:
T(delay)＝T(receive)+X-T(transmit)
Wherein, X represents to overflow compensation, is seasonal effect in time series full scale, i.e. X=2
32
Here need to prove: in this fixedly processing mode, under the situation that time serial message overflows, only compensate a seasonal effect in time series full scale (i.e. time series cycle) and calculate the test frame time delay, be based on the actual transfer delay of test frame time delay and can not surpass this prerequisite of time series full scale (as the 32bit counter, the 100MHz reference clock, a range is exactly 42.9 seconds).The problem of overflowing at time series, the technical scheme that embodiments of the invention provide is not limited to this a kind of settling mode, also can solve this problem by other mode, such as appointing certain rule in advance, when time of reception sequence information and transmitting time sequence information satisfy agreement in advance regular, overflow and be compensated for as two or three time series cycles, the assignment of X in the aforementioned calculation formula was got final product for two or three time series cycles; Perhaps in transmitting time sequence information and time of reception sequence information, increase the clock cycle information of transmitting time and time of reception, can obtain the information of test frame time delay by direct relatively transmitting time sequence information and time of reception sequence information, like this problem that can avoid time series to overflow.
The embodiment of the invention also provides a kind of method of testing long-distance frame time delay, and the technical scheme of the system of the testing long-distance frame time delay that its concrete implementation step and the embodiment of the invention provide is similar, repeats no more.
The embodiment of the invention also provides a kind of device of testing long-distance frame time delay, comprise test frame generation module and test frame analysis module, be provided with the timestamp generation module in test frame generation module and the test frame analysis module, the test frame generation module is arranged at the transmitting terminal of test frame, the test frame analysis module is arranged at the receiving terminal of test frame, similar in the technical scheme of the system of the testing long-distance frame time delay that the function of each module provides previously in the embodiment of the invention just repeats no more here.
In sum, embodiments of the invention provide a kind of system and method and device of testing long-distance frame time delay, for the delay testing of remote frame provides complete, integrative solution, good compatibility feature is provided, the application of both compatible many cover global position systems, also compatible built-in GPS or external reference clock access scheme efficiently solve cross-region, remote clock synchronization and the synchronous problem of clock reference; This scheme promptly can be realized by the surveying instrument of special use, also can be realized by communication equipment itself, as the BIST function, provides application such as business monitoring, network state detect in real time, network problem split fix that means of testing is provided for communication network; Simultaneously, also reach the high precision clock system and realized simple, with low cost beneficial effect.
So far; the preferred embodiment that the present invention only provides with the embodiment of the invention is that example has illustrated the technical scheme that the embodiment of the invention provides; but the present invention is not only limited to this embodiment; all are based on according to high accurate clock signal and time reference signal; the test test frame is by the technical scheme of the time delay of tested communication network; no matter which kind of form of employing is all within protection scope of the present invention.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1, a kind of system of testing long-distance frame time delay is characterized in that, described system comprises: timing parameter acquisition module, test frame generation module and test frame analysis module, wherein,
Timing parameter acquisition module: be arranged at the receiving terminal and the transmitting terminal of test frame, be used for pulse signal, the timing parameter that generation system needs according to its satellites transmits that receives;
Test frame generation module: be arranged at the transmitting terminal of test frame, be used for timing parameter, generate the test frame that carries the transmitting time sequence information, described test frame is sent to the test frame analysis module according to the timing parameter acquisition module generation that is arranged at transmitting terminal;
Test frame analysis module: be arranged at the receiving terminal of test frame, be used to receive the test frame of described test frame generation module, analyze described test frame, obtain the transmitting time sequence information that carries in the described test frame to its transmission; Timing parameter according to the timing parameter acquisition module that is arranged at receiving terminal generates produces the time of reception sequence information that receives described test frame; According to described transmitting time sequence information and time of reception sequence information, the test test frame is by the time delay of tested communication network.
2, system according to claim 1 is characterized in that, described timing parameter acquisition module comprises clock reference base modules, clock signal module and time reference processing module, wherein,
Clock reference base modules: be arranged at the transmitting terminal and the receiving terminal of test frame, be used for pulse signal, generate the high precision clock base reference signal according to its satellites transmits that receives;
Clock signal module: be arranged at the transmitting terminal and the receiving terminal of test frame, the high precision clock base reference signal that provides according to the clock reference base modules is provided, generate high accurate clock signal;
Time reference processing module: be arranged at the transmitting terminal and the receiving terminal of test frame, be used for detecting the high precision clock base reference signal that the clock reference base modules provides, rise time reference signal at predetermined instant.
3, system according to claim 1 is characterized in that, described test frame generation module comprises very first time stamp generation module and test frame sending module;
The very first time is stabbed generation module, is used for generating the transmitting time sequence information according to the high accurate clock signal of the clock signal module generation that is arranged at transmitting terminal and the time reference signal that the time reference processing module generates;
The test frame sending module is used to generate the test frame that carries the transmitting time sequence information, and described test frame is sent to the test frame analysis module.
4, system according to claim 1 is characterized in that, described test frame analysis module comprises acquisition module, the second timestamp generation module and the delay testing module of transmitting time sequence information:
The acquisition module of transmitting time sequence information is used to receive the test frame of described test frame generation module to its transmission, analyzes described test frame, obtains the transmitting time sequence information that carries in the described test frame;
The second timestamp generation module is used for generating the time of reception sequence information that receives described test frame according to the high accurate clock signal of the clock signal module generation that is arranged at receiving terminal and the time reference signal that the time reference processing module generates;
The delay testing module is used for the time of reception sequence information that the described transmitting time sequence information that the acquisition module according to the transmitting time sequence information provides and the second timestamp generation module generate, and the test test frame is by the time delay of tested communication network.
5, system according to claim 1, it is characterized in that, also comprise compensating module, be used for detecting the transmitting time sequence information and the time of reception sequence information exceeds time series during the cycle at the test frame analysis module, the described test frame of time series computation of Period by the compensation some is by the time delay of tested communication network.
6, a kind of method of testing long-distance frame time delay is characterized in that, described method comprises:
At the transmitting terminal and the receiving terminal of test frame, according to the pulse signal of the satellites transmits that receives, the timing parameter that generation system needs;
Described timing parameter according to transmitting terminal generates generates the test frame that carries the transmitting time sequence information, sends described test frame;
At the receiving terminal of test frame, receive described test frame to its transmission, analyze described test frame, obtain the transmitting time sequence information that carries in the described test frame; Described timing parameter according to receiving terminal generates produces the time of reception sequence information that receives described test frame; According to described time of reception sequence information and time of reception sequence information, the test test frame is by the time delay of tested communication network.
7, method according to claim 6 is characterized in that, the process of described generation timing parameter specifically comprises:
At described transmitting terminal and receiving terminal,, generate the high precision clock base reference signal according to the pulse signal of the satellites transmits that receives;
According to described high precision clock base reference signal, generate high accurate clock signal;
Detect described high precision clock base reference signal, rise time reference signal at predetermined instant.
8, method according to claim 6, it is characterized in that, described method comprises: detecting the transmitting time sequence information and the time of reception sequence information exceeds time series during the cycle, by the time series cycle of compensation some, calculate the time delay of described test frame by tested communication network.
9, a kind of device of testing long-distance frame time delay is characterized in that, described device comprises test frame generation module and test frame analysis module, wherein,
The test frame generation module is used for the timing parameter that receives according to it, generates the test frame that carries the transmitting time sequence information, by tested communication network, sends to the test frame analysis module;
The test frame analysis module is used to receive described test frame, according to its timing parameter that receives, generates the time of reception sequence information that receives described test frame; The test frame analysis module is resolved described test frame, obtains the transmitting time sequence information that carries in the described test frame, according to time of reception sequence information and described transmitting time sequence information, calculates the time delay of described test frame by tested communication network;
Described timing parameter is to produce according to the pulse signal of satellites transmits.
10, device according to claim 9, it is characterized in that, described test frame generation module comprises the timestamp generation module, and the high accurate clock signal and the time reference signal that provide according to transmitting terminal is provided described timestamp generation module, produces the transmitting time sequence information;
Described test frame analysis module comprises the timestamp generation module, and high accurate clock signal and time reference signal that described timestamp generation module provides according to receiving terminal produce the time of reception sequence information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100799832A CN100461721C (en) | 2007-03-01 | 2007-03-01 | System, method and apparatus for testing long-distance frame time delay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100799832A CN100461721C (en) | 2007-03-01 | 2007-03-01 | System, method and apparatus for testing long-distance frame time delay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101022373A true CN101022373A (en) | 2007-08-22 |
| CN100461721C CN100461721C (en) | 2009-02-11 |
Family
ID=38710031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100799832A Expired - Fee Related CN100461721C (en) | 2007-03-01 | 2007-03-01 | System, method and apparatus for testing long-distance frame time delay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100461721C (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431444B (en) * | 2007-11-07 | 2011-06-22 | 中兴通讯股份有限公司 | Test method for transmission equipment clock synchronous information switching time delay |
| CN102629897A (en) * | 2012-03-07 | 2012-08-08 | 华为技术有限公司 | Time efficiency discrimination method, control device and mechanical device |
| CN102655463A (en) * | 2011-03-02 | 2012-09-05 | 中兴通讯股份有限公司 | LMP (Link Manager Protocol)-based network link delay measurement method and device |
| CN103117822A (en) * | 2013-01-25 | 2013-05-22 | 华中科技大学 | Device for receiver channel group delay measurement |
| CN103117816A (en) * | 2013-01-04 | 2013-05-22 | 西北工业大学 | Measuring method of space teleoperation command time delay |
| CN103257352A (en) * | 2013-05-10 | 2013-08-21 | 航天东方红卫星有限公司 | Method for testing double-satellite GPS closed-loop control |
| CN103346866A (en) * | 2013-07-19 | 2013-10-09 | 武汉虹信通信技术有限责任公司 | Method of transmitting 1588v2 message in microwave system |
| CN104660460A (en) * | 2015-01-15 | 2015-05-27 | 北京奥普维尔科技有限公司 | System and method for testing performance of Ethernet |
| CN104749561A (en) * | 2015-03-10 | 2015-07-01 | 中国电子科技集团公司第十研究所 | Method of simulating real-time calibration of large time-delay analog source with high precision |
| CN105991374A (en) * | 2015-03-16 | 2016-10-05 | 施耐德电器工业公司 | Method for monitoring communication between transmitter and receiver |
| CN105991375A (en) * | 2015-03-16 | 2016-10-05 | 施耐德电器工业公司 | Method for monitoring communication between a transmitter and a receiver |
| CN107105226A (en) * | 2017-06-22 | 2017-08-29 | 上海迪爱斯通信设备有限公司 | A kind of video quality evaluation device |
| CN108768761A (en) * | 2018-04-11 | 2018-11-06 | 武汉大学 | Network signal propagation delay time nsec accuracy measurement method and device |
| CN109039421A (en) * | 2018-06-28 | 2018-12-18 | 上海卫星工程研究所 | Method for multi-load data relative transport delay testing |
| CN109959903A (en) * | 2019-03-07 | 2019-07-02 | 南京莱斯信息技术股份有限公司 | A kind of on-line checking Transmission System of Radar Data time delay device and detection method |
| CN111064533A (en) * | 2019-12-25 | 2020-04-24 | 上海科梁信息工程股份有限公司 | Time delay measurement system, time delay measurement method, electronic device, and storage medium |
| CN113507741A (en) * | 2021-07-01 | 2021-10-15 | 北京佰才邦技术股份有限公司 | Communication delay determination method and electronic equipment |
| CN116366834A (en) * | 2023-04-17 | 2023-06-30 | 上海车右智能科技有限公司 | Video delay real-time measurement system and method for remote driving |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004104237A (en) * | 2002-09-05 | 2004-04-02 | Toshiba Corp | Transmission delay time measuring system |
| US20050152406A2 (en) * | 2003-10-03 | 2005-07-14 | Chauveau Claude J. | Method and apparatus for measuring network timing and latency |
| CN100426758C (en) * | 2005-01-27 | 2008-10-15 | 华为技术有限公司 | One-way delay measuring method |
| CN100334846C (en) * | 2005-10-21 | 2007-08-29 | 湖南大学 | High precision network delay measuring method based on universal PC |
-
2007
- 2007-03-01 CN CNB2007100799832A patent/CN100461721C/en not_active Expired - Fee Related
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431444B (en) * | 2007-11-07 | 2011-06-22 | 中兴通讯股份有限公司 | Test method for transmission equipment clock synchronous information switching time delay |
| CN102655463A (en) * | 2011-03-02 | 2012-09-05 | 中兴通讯股份有限公司 | LMP (Link Manager Protocol)-based network link delay measurement method and device |
| CN102629897B (en) * | 2012-03-07 | 2015-04-08 | 华为技术有限公司 | Time efficiency discrimination method, control device and mechanical device |
| CN102629897A (en) * | 2012-03-07 | 2012-08-08 | 华为技术有限公司 | Time efficiency discrimination method, control device and mechanical device |
| CN103117816A (en) * | 2013-01-04 | 2013-05-22 | 西北工业大学 | Measuring method of space teleoperation command time delay |
| CN103117822A (en) * | 2013-01-25 | 2013-05-22 | 华中科技大学 | Device for receiver channel group delay measurement |
| CN103117822B (en) * | 2013-01-25 | 2014-12-31 | 华中科技大学 | Device for receiver channel group delay measurement |
| CN103257352A (en) * | 2013-05-10 | 2013-08-21 | 航天东方红卫星有限公司 | Method for testing double-satellite GPS closed-loop control |
| CN103346866A (en) * | 2013-07-19 | 2013-10-09 | 武汉虹信通信技术有限责任公司 | Method of transmitting 1588v2 message in microwave system |
| CN103346866B (en) * | 2013-07-19 | 2016-01-27 | 武汉虹信通信技术有限责任公司 | The method of 1588v2 message is transmitted in microwave system |
| CN104660460A (en) * | 2015-01-15 | 2015-05-27 | 北京奥普维尔科技有限公司 | System and method for testing performance of Ethernet |
| CN104749561A (en) * | 2015-03-10 | 2015-07-01 | 中国电子科技集团公司第十研究所 | Method of simulating real-time calibration of large time-delay analog source with high precision |
| CN104749561B (en) * | 2015-03-10 | 2017-05-31 | 中国电子科技集团公司第十研究所 | The method of long time delay simulation source high accuracy real time calibration |
| CN105991374A (en) * | 2015-03-16 | 2016-10-05 | 施耐德电器工业公司 | Method for monitoring communication between transmitter and receiver |
| CN105991375A (en) * | 2015-03-16 | 2016-10-05 | 施耐德电器工业公司 | Method for monitoring communication between a transmitter and a receiver |
| CN107105226A (en) * | 2017-06-22 | 2017-08-29 | 上海迪爱斯通信设备有限公司 | A kind of video quality evaluation device |
| CN108768761A (en) * | 2018-04-11 | 2018-11-06 | 武汉大学 | Network signal propagation delay time nsec accuracy measurement method and device |
| CN108768761B (en) * | 2018-04-11 | 2022-02-15 | 武汉大学 | Method and device for measuring nanosecond time precision of network signal transmission delay |
| CN109039421A (en) * | 2018-06-28 | 2018-12-18 | 上海卫星工程研究所 | Method for multi-load data relative transport delay testing |
| CN109959903A (en) * | 2019-03-07 | 2019-07-02 | 南京莱斯信息技术股份有限公司 | A kind of on-line checking Transmission System of Radar Data time delay device and detection method |
| CN111064533A (en) * | 2019-12-25 | 2020-04-24 | 上海科梁信息工程股份有限公司 | Time delay measurement system, time delay measurement method, electronic device, and storage medium |
| CN111064533B (en) * | 2019-12-25 | 2022-04-05 | 上海科梁信息科技股份有限公司 | Time delay measurement system, time delay measurement method, electronic device, and storage medium |
| CN113507741A (en) * | 2021-07-01 | 2021-10-15 | 北京佰才邦技术股份有限公司 | Communication delay determination method and electronic equipment |
| CN116366834A (en) * | 2023-04-17 | 2023-06-30 | 上海车右智能科技有限公司 | Video delay real-time measurement system and method for remote driving |
| CN116366834B (en) * | 2023-04-17 | 2023-12-05 | 上海车右智能科技有限公司 | Video delay real-time measurement system and method for remote driving |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100461721C (en) | 2009-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100461721C (en) | System, method and apparatus for testing long-distance frame time delay | |
| CN1904642B (en) | Apparatus and method for compensating the drift of a local clock used as sampling frequency | |
| CN112543078B (en) | Network time server calibration method and device based on satellite common view | |
| CN110133999A (en) | A kind of method for synchronizing time and clock synchronization system for adopting platform based on nebula laser point cloud number | |
| CN102801469B (en) | Optical fiber time frequency hybrid transmission method | |
| EP3217590B1 (en) | In-system global clock providing method and device | |
| CN102004441B (en) | Adaptive crystal oscillator frequency timekeeping method | |
| CN102006159A (en) | Multi-slave clock sampling value multi-interface synchronizing system based on IEEE1588 | |
| CN109633701A (en) | GNSS timing receiver system delay calibration method based on punctual lab resources | |
| US20100293243A1 (en) | method and apparatus for measuring directionally differentiated (one-way) network latency | |
| CN102232278B (en) | Method and device for detecting 1588 equipment performance | |
| CN106950426A (en) | Three-phase electric energy meter and its measuring method based on wide area synchro measure | |
| CN107037261A (en) | 0.2S level three-phase electric energy meters and its measuring method based on wide area synchro measure | |
| CN102130501A (en) | Wireless synchronous data acquisition device for checking direct current transformer of direct current converter station | |
| CN102638339A (en) | Method and device for realizing precision time synchronization | |
| CN102710359B (en) | Accurate clock frequency synchronizing method and device based on IEEE1588 (institute of electrical and electronics engineers) | |
| CN116865896A (en) | Network time service testing method and testing equipment | |
| CN103048919B (en) | Channel delay test-based satellite clock self-adjusting method | |
| CN103051487A (en) | Test method based on network measurement and control system time synchronous protocol in power industry | |
| CN110062223A (en) | A kind of method and its circuit system of high-precise synchronization test camera frame signal | |
| CN112702105B (en) | Ground-to-air communication radio station time frequency calibration system and method | |
| CN113794528A (en) | Time-frequency synchronous evaluation device and method for electric power 5G network time service | |
| CN220570541U (en) | Dual-mode core time corrector based on GPS/BD communication | |
| Ronen | Synchronization monitoring in IEEE1588 synchronization networks | |
| CN109450584A (en) | Time measurement device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090211 Termination date: 20180301 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |