CN103580936A - Method for executing tests in network elements and corresponding network elements - Google Patents

Method for executing tests in network elements and corresponding network elements Download PDF

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Publication number
CN103580936A
CN103580936A CN201210253533.1A CN201210253533A CN103580936A CN 103580936 A CN103580936 A CN 103580936A CN 201210253533 A CN201210253533 A CN 201210253533A CN 103580936 A CN103580936 A CN 103580936A
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test
frame
stream
service
network element
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马晓华
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Nokia Shanghai Bell Co Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
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Priority to CN201210253533.1A priority Critical patent/CN103580936A/en
Priority to PCT/IB2013/001237 priority patent/WO2014013303A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • H04L43/106—Active monitoring, e.g. heartbeat, ping or trace-route using time related information in packets, e.g. by adding timestamps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements
    • H04L43/55—Testing of service level quality, e.g. simulating service usage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/50—Network service management, e.g. ensuring proper service fulfilment according to agreements
    • H04L41/5003—Managing SLA; Interaction between SLA and QoS
    • H04L41/5009—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF]
    • H04L41/5012—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF] determining service availability, e.g. which services are available at a certain point in time
    • H04L41/5016—Determining service level performance parameters or violations of service level contracts, e.g. violations of agreed response time or mean time between failures [MTBF] determining service availability, e.g. which services are available at a certain point in time based on statistics of service availability, e.g. in percentage or over a given time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • H04L43/0829—Packet loss
    • H04L43/0835—One way packet loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0852—Delays
    • H04L43/0858—One way delays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H04L43/0894—Packet rate

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention provides a method for executing tests in network elements and the corresponding network elements according to the problems that an existing network testing method based on OAM can not test service configuration (CIR/CBS/PIR/PBS and QoS priority level) and an outside testing instrument is quite high in cost. According to the method, the first network element generates test services and provides the test services to the QoS for processing before the test services are sent to the second network element for testing. The test service generation procedures include the steps of dispatching one or more streams of test services, generating test frames for the dispatched streams and adding sending time tabs in the generated test frames. The second network element is used for detecting the test services which have undergone the QoS processing, wherein the detecting procedures include the steps of adding receiving time tabs for the received test frames, classifying the received test frames to one ore more streams of test services and calculating a test result for each stream based on the received test frames of the stream.

Description

In network element, carry out method and the corresponding network element of test
Technical field
The present invention relates to network test field.
Background technology
Increasing operator verifies that whether network is qualified before focusing on and activating the service, and therefore activation of service (Service Activation) test has become an important hot spot technology.In the past, IETF RFC2544 is the Ethernet service method of testing being most widely used always, because it is the sole criterion in this field.But RFC2544 does not contain required all measurements, for example packet jitter, QoS measure and a plurality of concurrent business-level.In order to address these problems, Y.1564 ITU-T has introduced, all types of business that it can emulation moves on network, and be respectively all crucial SLA parameters of each operational trials simultaneously, and also can verify that the QoS mechanism that network provides thinks that different types of service provides different priority, thereby make to verify more accurately and dispose and look into more fast error correction.Now, increasing service provider favors in using inner CPE (client device) test function that activation of service process is simplified, rather than depends on expensive external test facility.Although some cpe device manufacturers have realized RFC2544 in their network element (network element), up till now, also do not have cpe device manufacturer to realize new standard Y.1564.
Summary of the invention
Visible, in CPE or other network elements, realize a crucial differentiation factor that Y.1564 will become operator's Ethernet market.
Some existing method of testings below
1.Y.1731TST.
2.802.1ag?LB.
The privately owned loopback agreement of 3.JDSU (proprietary Loopback protocol)
4.EXFO?Y.1564.
Wherein, Y.1731TST can fill order to service feature test, but it cannot verify business configuration (CIR/CBS/PIR/PBS and QoS priority), also cannot emulation IP bag or the bag on other upper stratas.
802.1ag LB is with Y.1731TST similar, and it is merely able to test loop test, and cannot carry out unidirectional test.In the situation that transmission path has asymmetric performance, unidirectional performance cannot correctly derive from go-and-return test result.
The privately owned loopback agreement of JDSU is with the EVC loopback on long-range NE, and it only can test loop parameter, and frame that only can simulation layer 2.
Y.1564, EXFO is existing good scheme, but it needs very expensive testing equipment, and needs extra synchronization mechanism, out-of-band signalling and complicated algorithm.
Before sending customer service, NE carries out QoS to the customer service arriving and processes, comprise control (policing) (CIR/CBS/PIR/PBS) → congestion control (congestion control) → queuing (queuing) → scheduling (scheduling) → shaping (shaping).In some existing method of testings, for example 802.1ag LB/Y.1731 is OAM (Operations, Administration and Maintenance) function based on Ethernet.OAM(Operation Administration Maintenance) be used to by OAM bag be inserted into QoS process among or therefrom extract OAM bag, OAM is coated is inserted in control (CIR/CBS/PIR/PBS) afterwards and before congestion control.
Visible, OAM(Operation Administration Maintenance) is between control and congestion control, so OAM bag do not experience control and process, so OAM is also incomplete same with real customer service.The test mode that Here it is based on OAM cannot be verified the reason of business configuration (IR/CBS/PIR/PBS and QoS priority).But, Y.1564 need to verify business configuration, comprise business classification, CIR/PIR/CBS/PBS and qos parameter, for example priority.Therefore, need a kind of new testing scheme to meet demand Y.1564.
According to an aspect of the present invention, at the transmit leg of test service, provide a kind of in the first network element for carrying out the method for test, comprise the steps:
-produce test service, and this test service being sent to the second network element for before testing, this test service is offered to QoS and process;
Wherein, this generation step comprises:
-dispatch the test service of one or more streams;
-be that the stream being scheduled generates test frame;
-in generated test frame, add transmitting time mark.
According to this aspect, this test service was inserted into before QoS processes, therefore its suffered processing is the same with real customer service, so business configuration (CIR/CBS/PIR/PBS and QoS priority) can be tested, thereby all requirements Y.1564 can be capped.In addition, this scheme is performed in network element (NE), and without outside testing equipment, and operator does not need to dispose at the scene Test Engineer and the high tester of use cost.
One preferred embodiment in, the method also comprised the steps: before this generation step
-from network management system, receive test configurations;
Described generation step produces described test frame according to this test configurations;
Described QoS processes and comprises following operation:
Control, congestion control, queues up, scheduling and shaping.
In this embodiment, because NE is managed by network management system (NMS), this NMS can be known the test configurations information that operator is required, so this NMS can notify this configuration information to test both sides easily, therefore testing both sides does not need extra control protocol to exchange configuration information.Operator only need operate NMS can complete test.
One preferred embodiment in, this test configurations comprises following Arbitrary Term:
-number of services and corresponding test sign to be tested;
-for testing procedure and testing period of each test;
The size of-test frame;
-CIR (CIR);
The form of-test frame;
-Ethernet frame head;
Described generation step also joins following information arbitrarily in the test frame being produced:
-Ethernet frame head;
The test sign of the stream of-sign test service;
The sequence number of-this test service in this stream;
No more than 64 bytes of length of this test frame.
This execution mode provides the particular content of test configurations and for the concrete frame structure of test frame.
One preferred embodiment in, the method also comprises the steps: before described generation step
-with they self synchronization mechanism, come lock in time and frequency with described the second network element.
In this embodiment, test function can be used the synchronization mechanism (for example IEEE1588 or SyncE) of network element self to obtain synchronously, therefore obtains one-way performance test result accurately.
One preferred embodiment in, this generation step produces this test frame according to the CIR of this stream, wherein,
CIR based on this stream be you can well imagine for token to these one or more flow points,
Described scheduling step is selected a stream from this one or more stream according to dispatching algorithm, and determines whether this stream of selecting has enough tokens:
-when having enough tokens, for this stream of selecting generates test frame;
-otherwise described scheduling step selects next stream to repeat above operation according to this dispatching algorithm.
In the prior art, outside tester produces test frame with point-device clock and a large amount of timers accurately.Timer is very expensive.This execution mode of the present invention avoids using expensive timer with QoS scheduling mechanism.Like this, present embodiment can obtain higher accuracy with lower cost.
According to another aspect of the present invention, the recipient of test service, provide a kind of method of carrying out test in the second network element, comprised the steps:
-receive for carrying out the test service of the first network element transmission of test;
-detection had been performed this test service that QoS processes;
Wherein, this detecting step comprises:
-received test frame is added to time of reception mark;
-received test frame is classified to the test service of one or more streams;
-respectively for each stream, the test frame of this stream based on received, calculates test result.
According to this aspect, the test service transmitting in network stands after QoS processes to be just extracted in recipient, therefore this test service is the same with real customer service, so business configuration (CIR/CBS/PIR/PBS and QoS priority) can be tested, and all Y.1564 demands can both be capped.In addition, this scheme is performed in network element (NE), and without outside testing equipment, and operator does not need to dispose at the scene Test Engineer and the high tester of use cost.
One preferred embodiment in, described calculation procedure comprises the following steps:
-quantity of received test frame is counted;
-according to the length of received test frame and testing period, computing information rate;
-according to the quantity of the quantity of received frame and the frame that sends, calculate frame loss rate;
-testing period and unavailable phase based on be received beginning from first frame, computing service percentage of time, wherein, unavailable interim at this, frame loss rate is kept above a threshold value to one section of continuing phase.
This execution mode provides the concrete mode of the test results such as computing information rate, frame loss rate and business hours percentage.
According to one preferred embodiment, this calculation procedure is further comprising the steps of:
-transmitting time mark and time of reception mark based on each test frame, calculates frame transfer delay;
-based on each frame transfer delay, calculate frame transfer delay poor.
This execution mode provides and has calculated frame transfer delay and the concrete mode of the test result such as frame transfer delay is poor.
According to a third aspect of the present invention, provide a kind of for carrying out the first network element of test, comprise a test pattern generator, this test pattern generator is processed for generation of test service and this test service being sent to for offering QoS before carrying out the second network element of test, and this test pattern generator comprises:
-one or more unit, correspond respectively to a Business Stream, for generation of the test frame of this stream;
-scheduler, produces the test frame of this stream for dispatching described one or more unit;
-transmitting time flag update device, adds transmitting time mark for the test frame generated.
Preferably, this unit comprises:
-reshaper, safeguards token for the CIR based on this stream;
-test frame maker, for generating the test frame of this stream;
Wherein, this scheduler is for selecting a stream according to dispatching algorithm from this one or more stream, and by reshaper corresponding to the stream of selecting with this (whether this reshaper of notifying has enough tokens:
-when this reshaper has enough tokens, this scheduler indicates this test frame maker to generate the test frame of this stream;
-otherwise this scheduler is selected next stream according to this dispatching algorithm.
According to aspect the 4th of the present invention, provide a kind of for carrying out the second network element of test, this second network element receives by the test service sending for carrying out the first network element of test, this second network element comprises test-based examination device, this test-based examination device is for detection of this test service that was performed QoS processing, wherein, this test-based examination device comprises:
-time of reception flag update device, adds time of reception mark for the test frame to received;
-grader, for being classified to received test frame the test service of one or more streams;
-one or more unit, for respectively, for each stream, the test frame of this stream based on received, calculates test result.
Preferably, this unit comprises:
-counter, counts for the quantity of the test frame to received;
-computation subunit, calculates this test result for quantity and the temporal information of the test frame based on received.
These of embodiments of the present invention and other features will embodiment below partly be described, or the embodiment based on is below known by one of ordinary skill in the art.
Accompanying drawing explanation
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows according to the module map of the test pattern generator of a preferred embodiment of the present invention and signal flow;
Fig. 2 shows according to module map and the signal flow of the test-based examination device of a preferred embodiment of the present invention;
Fig. 3 shows the schematic diagram of unavailable phase;
Fig. 4 shows according to two of the test frame of a preferred embodiment of the present invention kinds of frame structures.
Wherein, same or analogous Reference numeral represents same or analogous module.
Embodiment
The invention provides a kind of in the first network element for carrying out the method for test, comprise the steps:
-produce test service, and this test service being sent to the second network element for before testing, this test service is offered to QoS and process;
Wherein, this generation step comprises:
-dispatch the test service of one or more streams;
-be that the stream being scheduled generates test frame;
-in generated test frame, add transmitting time mark.
Correspondingly, the present invention also provide a kind of in the second network element for carrying out the method for test, comprise the steps:
-receive for carrying out the test service of the first network element transmission of test;
-detection had been performed this test service that QoS processes;
Wherein, this detecting step comprises:
-received test frame is added to time of reception mark;
-received test frame is classified to the test service of one or more streams;
-respectively for each stream, the test frame of this stream based on received, calculates test result.
Preferably, before test, the first network element and the second network element all receive the test configurations from network management system (NMS).Because all network elements are all under the management in NMS, operator can, by being configured on test both sides network element with NMS, not need extra control protocol that local configuration is sent to long-range the other side.
For the first network element that produces test service, test configurations comprises:
-number of services and corresponding test sign to be tested;
-for testing procedure and testing period of each test;
The size of-test frame;
-CIR (CIR);
The form of-test frame;
-Ethernet frame head.
For the second network element that receives test service, test configurations comprises:
-number of services and corresponding test sign to be tested;
-for testing procedure and testing period of each test;
The size of-test frame;
The form of-test frame;
-business acceptance criterion, comprising:
-frame loss rate;
-frame transfer delay;
-frame transfer delay is poor;
-business hours percentage.
Preferably, before test, the first network element and the second network element come lock in time and frequency with they self synchronization mechanism.They can be undertaken synchronously by modes such as IEEE1588 or SyncE, thereby realize one-way performance test accurately.
Description below be take and described from the unidirectional test of the first network element to the second network element as example.Will be understood that term first and second is only used to the generation side of differentiating measurement business and the recipient of test service, and do not form any restriction to the function of actual network element.In actual network design, single network element can be the test generation side of certain test and the test recipient of another test simultaneously.
First, the first network element produces test service, and this test service being sent to this second network element for before testing, this test service is offered to QoS and process.The first network element contains a test pattern generator and carries out this operation.This test pattern generator produces test service stream and comes emulation to be encapsulated in for example, customer service among different transport layers (Ethernet or IP layer network), and this test service stream is inserted into the entrance of UNI-N.
Particularly, this test pattern generator comprises:
-one or more unit 10, correspond respectively to a Business Stream, for generation of the test frame of this stream;
-scheduler 12, produces the test frame of this stream for dispatching described one or more unit 10;
-transmitting time flag update device 14, adds transmitting time mark for the test frame generated.
Preferably, each unit 10 comprises:
-reshaper 100, safeguards token for the CIR based on this stream;
-test frame maker 102, for generating the test frame of this stream
With upper module as shown in fig. 1.In Fig. 1, each organizes test frame maker [i] 102 and the corresponding test service stream of reshaper [i] 100 i.
Design the Y.1564 where the shoe pinches of test pattern generator and be, when produce a plurality of tests simultaneously, flow and be input in the situation of identical UNI, how to keep each test stream to be produced equably and in strict accordance with required information rate.Present embodiment provides a kind of easy generation to test the scheme of stream more.Reshaper 100 can be regarded a token bucket as, and its CIR based on configured produces token.Scheduler 12 operation dispatching algorithms (for example WRR or WFQ) are selected one from a plurality of tests stream, and inquire that this test being selected flows corresponding reshaper 100 and whether have enough tokens.When reshaper 100 inform scheduler 12 it have enough tokens with allow test frame by time, scheduler 12 is controlled test frame makers 102 and is generated the test frame of these streams and this test frame is sent on the line.Test frame maker 102 generates this test frame according to configured frame sign and form.Present embodiment does not need a complicated timer of algorithm calculating to generate test frame.
Transmitting time flag update device 14 adds transmitting time mark in generated test frame, and for example one according to the Tx timestamp of line speed, and it is almost identical that this time and this test frame are sent to real time of UNI.
Afterwards, scheduler 12 is selected next test stream according to dispatching algorithm, and modules repeats above operation.
In the situation that test when the reshaper 100 flowing is scheduled and there is no enough tokens corresponding to certain, the test frame of this test stream cannot send.Scheduler 12 is selected next test stream according to dispatching algorithm, and modules repeats above operation.
The first network element carries out QoS processing to the test frame on circuit.Particularly, QoS processes and comprises successively:
Control (CIR/CBS/PIR/PBS) → congestion control → queuing → scheduling → shaping.
After QoS processes, test frame is sent on network, and is sent to the second network element.
The second network element receives the test service being sent by the first network element, and the test service of this reception is carried out to QoS processing.This QoS processes and comprises successively following operation:
Classification → congestion control → queuing → scheduling → shaping.
After QoS processes, test service is detected to obtain the result of test.
The second network element contains a test-based examination device and detects test service, and this test-based examination device comprises:
-time of reception flag update device 20, adds time of reception mark for the test frame to received;
-grader 22, for being classified to received test frame the test service of one or more streams;
-one or more unit 24, for respectively, for each stream, the test frame of this stream based on received, calculates test result.
Preferably, unit 24 comprises:
-counter 240, counts for the quantity of the test frame to received;
-computation subunit 242, calculates this test result for quantity and the temporal information of the test frame based on received.
With upper module as shown in Figure 2.In Fig. 2, each organizes counter [i] 240 and computation subunit [i] 242 corresponds respectively to a test service stream.
Time of reception flag update device 20 adds time of reception mark, for example Rx timestamp with line speed.Afterwards, grader 22 is classified to respectively corresponding test stream by received all test frames.The quantity of the test frame receiving of 240 pairs of this test streams of count pick up device is counted.Computation subunit 242 is calculated test result based on transmitting time mark, time of reception mark, the count value of count pick up device and user's test configurations (information rate of test, testing period etc.).Wherein, test result and computational methods thereof will describe in detail below.
For calculated example is as information rate (IR), frame loss rate (FLR), frame transfer delay (FTD) and frame transfer delay poor (FDV), easy computational methods are provided here.Wherein, TimeOut waited for the time of last valid frame for certain test stream before stopping test.
● information rate (IR)
Length and the duration during this period of the test frame receiving in during information rate basis calculate.
The following institute of average information rate that receives the reception test service in testing period of beginning from first test frame is calculated
Figure BDA00001913142600101
(i test frame during (T first received frame, T first received frame+ the testing period) in, receive)
● frame loss rate (FLR)
Frame loss rate is to calculate according to the quantity of received frame and the quantity of the frame sending.Wherein, the quantity of the frame of transmission can be notified by network management system
Total FLR is that the sum of losing test frame accounts for the total ratio that sends frame:
Figure BDA00001913142600102
during (T first received frame, T first received frame+ testing period+TimeOut) in
● frame transfer delay (FTD)
Average frame transmission delay
Figure BDA00001913142600111
(i frame is at (T receive the 1st frame, T receive the 1st frame+ testing period+TimeOut) received in)
Largest frames transmission delay
X_FTD=Max{T receive i frame-T i frame is sent out}
Minimum frame transmission delay
M_FTD=Min{T receive i frame-T i frame is sent out}
● frame transfer delay is poor
Average frame transmission delay differences
Figure BDA00001913142600112
(i frame is at (T receive the 1st frame, T receive the 1st frame+ testing period+TimeOut) received in)
Largest frames transmission delay differences
X_FDV＝max{FTD l+1-FTD i}
Minimum frame transmission delay differences
M_FDV＝min{FTD i+1-FTD i}
●AVAIL
AVAIL is percentage service time, its according to time of being received from first frame start during and the unavailable phase calculate, wherein, unavailable interim at this, frame loss rate is kept above a threshold value to one section of continuing phase.As shown in Figure 3, SES eTHbe Severely Errored Seconds, the frame loss rate of the frame detecting in during this second surpasses a threshold value s1.Here, s1 is for example 0.5, and in other examples, any suitable value based in other 0-1 intervals of for example grade of service (CoS) can be used.Once continuous some SES eTHbe detected, for example, be 10 in Fig. 3, and frame loss rate is to continuous 10 SES eTHbe kept above a threshold value.And after there is continuous ten or above nonfatal error second, the unavailable phase finishes before first nonfatal error second.
AVAIL is the ratio of non-unavailable phase in total testing period in total testing period:
Figure BDA00001913142600113
Because the size of the frame of Ethernet is to be not less than 64 bytes, and fill any ethernet frame of emulation afterwards because test frame need to be added, therefore, the length of test frame (without filling) is preferably no more than 64 bytes.Therefore, preferably should be able to simplify the frame format of test frame, shorten the length of test frame.Due to some detecting information, the information such as transmission information rate such as testing period, test frame form, test are specific to each test stream, and these information can have network management system to inform receiving terminal in test configurations, so they needn't be placed in test frame, test frame only contains a test sign that shows test stream, and receiving terminal can identify according to this test will corresponding other information.From above computing formula, can find out, test frame size and transmitting time mark are specific for each test frame, so should be placed in this frame.In addition, if it is out of order to detect frame, the sequence number of frame also needs.Alternatively, can in test frame, add end mark finishes to show this test stream to test-based examination device.As shown in Figure 4, wherein, DA represents destination address to the frame format of example, and SA represents source address, FCS representative frame verification sequence.Therefore, no more than 64 bytes of the total length of the test frame of with or without IP head.
Form has below provided the difference comparison between embodiments of the present invention and other schemes (the unidirectional measurement of tester, measure with loop/loopback of the EVP loopback on single-ended UE, and 802.1agLB/Y.1731TST).Based on this relatively, can find out, embodiments of the present invention are fairly simple, and cost is lower, and importantly it can meet demand Y.1564, and has the accuracy being close with tester.
Table 1
Figure BDA00001913142600121
Figure BDA00001913142600131
It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be combination in any mutually.Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
One of ordinary skill in the art will appreciate that all or part of step in said method can come instruction related hardware to complete by program, described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can realize with one or more integrated circuits.Correspondingly, each the module/unit in above-described embodiment can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

Claims (15)

  1. In the first network element for carrying out a method for test, comprise the steps:
    -produce test service, and this test service being sent to the second network element for before testing, this test service is offered to QoS and process;
    Wherein, this generation step comprises:
    -dispatch the test service of one or more streams;
    -be that the stream being scheduled generates test frame;
    -in generated test frame, add transmitting time mark.
  2. 2. method according to claim 1, is characterized in that, before this generation step, also comprises the steps:
    -from network management system, receive test configurations;
    Described generation step produces described test frame according to this test configurations;
    Described QoS processes and comprises following operation:
    Control, congestion control, queues up, scheduling and shaping.
  3. 3. method according to claim 2, is characterized in that, this test configurations comprises following Arbitrary Term:
    -number of services and corresponding test sign to be tested;
    -for testing procedure and testing period of each test;
    The size of-test frame;
    -CIR (CIR);
    The form of-test frame;
    -Ethernet frame head;
    Described generation step also joins following information arbitrarily in the test frame being produced:
    -Ethernet frame head;
    The test sign of the stream of-sign test service;
    The sequence number of-this test service in this stream;
    No more than 64 bytes of length of this test frame.
  4. 4. method according to claim 1, is characterized in that, before described generation step, also comprises the steps:
    -with they self synchronization mechanism, come lock in time and frequency with described the second network element.
  5. 5. method according to claim 1, is characterized in that, this generation step produces this test frame according to the CIR of this stream, wherein,
    CIR based on this stream be you can well imagine for token to these one or more flow points,
    Described scheduling step is selected a stream from this one or more stream according to dispatching algorithm, and determines whether this stream of selecting has enough tokens:
    -when having enough tokens, for this stream of selecting generates test frame;
    -otherwise described scheduling step selects next stream to repeat above operation according to this dispatching algorithm.
  6. In the second network element for carrying out a method for test, comprise the steps:
    -receive for carrying out the test service of the first network element transmission of test;
    -detection had been performed this test service that QoS processes;
    Wherein, this detecting step comprises:
    -received test frame is added to time of reception mark;
    -received test frame is classified to the test service of one or more streams;
    -respectively for each stream, the test frame of this stream based on received, calculates test result.
  7. 7. method according to claim 7, is characterized in that, also comprises step before described detecting step:
    -reception is from the test configurations of network management system;
    Described QoS processes and comprises following operation:
    Classification, congestion control, queues up, scheduling and shaping.
  8. 8. method according to claim 7, is characterized in that, described test configurations comprises following Arbitrary Term:
    -number of services and corresponding test sign to be tested;
    -for testing procedure and testing period of each test;
    The size of-test frame;
    The form of-test frame;
    -business acceptance criterion, comprising:
    -frame loss rate;
    -frame transfer delay;
    -frame transfer delay is poor;
    -business hours percentage.
  9. 9. method according to claim 6, is characterized in that, the method also comprised before described detecting step:
    -with they self synchronization mechanism, come lock in time and frequency with described the first network element.
  10. 10. method according to claim 6, is characterized in that, described calculation procedure comprises the following steps:
    -quantity of received test frame is counted;
    -according to the length of received test frame and during, computing information rate;
    -according to the quantity of the quantity of received frame and the frame that sends, calculate frame loss rate;
    -testing period and unavailable phase based on be received beginning from first frame, computing service percentage of time, wherein, unavailable interim at this, frame loss rate is kept above a threshold value to one section of continuing phase.
  11. 11. methods according to claim 10, is characterized in that, this calculation procedure is further comprising the steps of:
    -transmitting time mark and time of reception mark based on each test frame, calculates frame transfer delay;
    -based on each frame transfer delay, calculate frame transfer delay poor.
  12. 12. 1 kinds for carrying out the first network element of test, comprises a test pattern generator, and this test pattern generator is processed for generation of test service and this test service being sent to for offering QoS before carrying out the second network element of test, and this test pattern generator comprises:
    -one or more unit (10), correspond respectively to a Business Stream, for generation of the test frame of this stream;
    -scheduler (12), produces the test frame of this stream for dispatching described one or more unit (10);
    -transmitting time flag update device (14), adds transmitting time mark for the test frame generated.
  13. 13. the first network elements according to claim 12, is characterized in that, this unit (10) comprising:
    -reshaper (100), safeguards token for the CIR based on this stream;
    -test frame maker (102), for generating the test frame of this stream;
    Wherein, this scheduler (12) is for selecting a stream according to dispatching algorithm from this one or more stream, and whether has enough tokens by reshaper corresponding to the stream of selecting with this (100) this reshaper of notifying (100):
    -when this reshaper (100) has enough tokens, this scheduler (12) indicates this test frame maker (102) to generate the test frame of this stream;
    -otherwise this scheduler (12) is selected next stream according to this dispatching algorithm.
  14. 14. 1 kinds for carrying out the second network element of test, this second network element receives by the test service sending for carrying out the first network element of test, this second network element comprises test-based examination device, this test-based examination device is for detection of this test service that was performed QoS processing, wherein, this test-based examination device comprises:
    -time of reception flag update device (20), adds time of reception mark for the test frame to received;
    -grader (22), for being classified to received test frame the test service of one or more streams;
    -one or more unit (24), for respectively, for each stream, the test frame of this stream based on received, calculates test result.
  15. 15. the second network elements according to claim 14, is characterized in that, this unit (24) comprise:
    -counter (240), counts for the quantity of the test frame to received;
    -computation subunit (242), calculates this test result for quantity and the temporal information of the test frame based on received.
CN201210253533.1A 2012-07-20 2012-07-20 Method for executing tests in network elements and corresponding network elements Pending CN103580936A (en)

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