Differential protection service bearing test method based on SPN technology

Abstract

The invention relates to a differential protection service bearing test method based on an SPN technology, and belongs to the technical field of power grids. The method comprises an SPN slice physical isolation capability test and a CBR service capability test. The CBR service capability test comprises a service bearing capability test, a service end-to-end forwarding time delay and jitter test, a service end-to-end physical isolation capability test and a service protection capability test; if the service bearing capability test, the service end-to-end forwarding time delay and jitter test, the service end-to-end physical isolation capability test and the service protection capability test all pass, the CBR service capability test is qualified; and when both the SPN slice physical isolation capability test and the CBR service capability test are qualified, judging that the differential protection service can be borne. According to the method, major breakthrough and innovation of application of the SPN technology in the power grid are used, the data blank of online operation testing of the services is filled up, and a new construction thought can be provided for construction of power communication networks in various regions.

Description

Technical Field

[0001] The present invention belongs to the technical field of power grids, and particularly relates to a differential protection service bearing test method based on SPN technology. Background Art

[0002] As an advanced, reliable, stable and efficient emerging communication technology and system, SPN (Slicing Packet Network) has been gradually put into operation after the completion of the construction of the SPN communication equipment bearer network project. It is urgent to complete the commissioning of various power grid services carried on the SPN network to adapt to the diverse service platforms of the power grid and give full play to the powerful bearing capacity, differential security isolation ability and more efficient and flexible operation and management ability of SPN.

[0003] The currently built and put into operation SPN devices mainly bear the voice and video private network and the production management area (security zone III) network of the management information area, mainly focusing on services with the characteristic of large bandwidth. As one of the most basic and important real-time power grid production control services, the power grid differential protection service plays an important role in undertaking the control and protection of important transmission lines in the power grid. The differential protection service generally uses the pilot fiber protection channel as the main one, and currently mainly adopts the way of multiplexing fiber loops to be carried on the power fiber communication network. The communication interface of the differential protection device provides 2M to access the fiber communication system, and has very strict requirements for delay, isolation and reliability. However, the currently configured traditional E1 interface board does not have the end-to-end physical isolation ability and cannot bear the differential protection service and automation service. At the same time, there is still no relevant application exploration on the bearing capacity of SPN technology for highly reliable and low-delay services such as differential protection and automation.

[0004] Therefore, how to overcome the deficiencies of the existing technology is an urgent problem to be solved in the current technical field of power grids. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies of the existing technology and provide a differential protection service bearing test method based on SPN technology.

[0006] To achieve the above purpose, the technical scheme adopted by the present invention is as follows:

[0007] A differential protection service bearing test method based on SPN technology uses a differential protection service bearing test device based on SPN technology; the differential protection service bearing test device based on SPN technology includes a first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, a second SDH analyzer and a data network analyzer;

[0008] The differential protection service bearing test method based on SPN technology described above includes SPN slice physical isolation ability test and CBR service ability test; among them, the CBR service ability test includes service bearing ability test, service end-to-end forwarding delay and jitter test, service end-to-end physical isolation ability test and service protection ability test;

[0009] If the service bearing ability test, service end-to-end forwarding delay and jitter test, service end-to-end physical isolation ability test and service protection ability test all pass, then the CBR service ability test is qualified;

[0010] When both the SPN slice physical isolation ability test and the CBR service ability test are qualified, it is determined that the differential protection service can be carried; otherwise, the differential protection service cannot be carried.

[0011] Further, preferably, the SPN slice physical isolation ability test includes the following steps:

[0012] Step (1.1), during the SPN slice physical isolation ability test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence; the data network analyzer is connected to network element NE1 and network element NE2 respectively;

[0013] Step (1.2), configure a 1G small-granularity slice in the network, configure an E1 service connection between network element NE1 and network element NE2 devices, map it to a 1x10Mbps fine-grained channel through a CBR E1 service container for bearing, and associate the 10M fine-grained channel with the 1G small-granularity slice. The path is NE1-NE3-NE4-NE2, and network element NE3 and network element NE4 are configured with fine-grained cross-connections;

[0014] Step (1.3), configure a 2G packet slice in the network, configure an L3VPN service between network element NE1 and network element NE2 devices, and bear it using the remaining 479 10Mbps fine-grained channels in the same 1G small-granularity channel;

[0015] Step (1.4), test and verify that the E1 service signal is normal through the first SDH analyzer and the second SDH analyzer;

[0016] Step (1.5), send Ethernet service traffic from the data network analyzer, with a packet length of 1518 bytes, a traffic bandwidth of 3Gbps, and a priority of EF, and record the one-way delay and jitter;

[0017] Step (1.6), record the delay and error code conditions of the E1 service of the first SDH analyzer and the second SDH analyzer;

[0018] Step (1.7): Increase the Ethernet service traffic bandwidth sent by the data network analyzer to 8 Gbps;

[0019] Step (1.8): Record the delay and error conditions of the E1 service of the first SDH analyzer and the second SDH analyzer;

[0020] Step (1.9): When testing the E1 service in step (1.4), if the service bit error rate is less than 10 7 , and there is no alarm;

[0021] And after the data network analyzer sends the Ethernet service traffic in step (1.5), the Ethernet service traffic is normal, without packet loss and alarms;

[0022] And after the data network analyzer sends the Ethernet service traffic in step (1.7), congestion occurs in the Ethernet service and packet loss occurs;

[0023] And when testing the E1 service in step (1.6) and step (1.8), the service bit error rate is less than 10 7 , there is no alarm, the unidirectional delay should be ≤ 15 ms, and the loopback delay should be ≤ 30 ms;

[0024] Then the SPN slice physical isolation ability test passes; otherwise, the test fails.

[0025] Furthermore, preferably, in step (1.5), the unidirectional delay includes the average delay, the maximum delay, and the minimum delay; the jitter includes the average jitter, the maximum jitter, and the minimum jitter.

[0026] Furthermore, preferably, the service carrying capacity test includes the following steps:

[0027] Step (2.1): When performing the service carrying capacity test, connect the first SDH analyzer, network element NE 1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence;

[0028] Step (2.2): Configure an E1 service between network element NE 1 and network element NE2, use a 1×10 Mbps fine-grained channel to carry it, map it into a CBR E1 service container, and the path is network element NE 1-network element NE3-network element NE4-network element NE2. Configure fine-grained cross-connections for network element NE3 and network element NE4;

[0029] Step (2.3): On both the first SDH analyzer and the second SDH analyzer, set the E1 signal load to the non-framed mode and the framed mode in sequence, and verify that the E1 service signal is normal through the first SDH analyzer and the second SDH analyzer;

[0030] Step (2.4), in the E1 signal framing mode, set the PRBS loads of the two SDH analyzers to 2 9 -1, 2 15 -1, 2 20 -1, 2 23 -1, and test and verify the alarm and error conditions of the E1 signal;

[0031] Step (2.5), when in the tests of Step (2.3) and Step (2.4), the bit error rate of the E1 service is less than 10 7 , and there is no alarm, then the service carrying capacity test passes; otherwise, it fails.

[0032] Furthermore, preferably, the service end-to-end forwarding delay and jitter test includes the following steps:

[0033] Step (3.1), when conducting the service end-to-end forwarding delay and jitter test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence;

[0034] Step (3.2), configure an E1 service between the network element NE1 and the network element NE2 devices, use a 1×10 Mbps fine-grained channel to carry it, map it into the CBR E1 service container, and the path is network element NE1 - network element NE3 - network element NE4 - network element NE2. Configure fine-grained cross-connections for network element NE3 and network element NE4;

[0035] Step (3.3), test and record the one-way delay of the E1 service through the first SDH analyzer and the second SDH analyzer, and calculate the two-way delay difference;

[0036] Step (3.4), test through the first SDH analyzer and the second SDH analyzer whether the output jitter and input jitter tolerance of the E1 service meet the standard requirements;

[0037] Step (3.5), when for the one-way delay of the E1 service recorded in Step (3.3), the one-way delay should be ≤15 ms; the two-way delay difference of the E1 service should be less than 200 μs;

[0038] Meanwhile, if the jitter performance of the E1 interface obtained from the test in Step (3.4) meets the requirements of YD / T 1420 - 2005, then the service end-to-end forwarding delay and jitter test passes; otherwise, it fails.

[0039] Furthermore, preferably, when conducting the service end-to-end forwarding delay and jitter test, if the one-end loopback method is adopted, then Step (3.3) becomes to test the loopback delay of the E1 service, and the two-way delay difference is not calculated;

[0040] Step (3.5) becomes: In step (3.3), record the loopback delay of the E1 service, and the loopback delay should be ≤ 30 ms; meanwhile, if the jitter performance of the E1 interface obtained in step (3.4) meets the requirements of YD / T 1420-2005, the end-to-end forwarding delay and jitter test of the service pass; otherwise, it fails.

[0041] Furthermore, preferably, the end-to-end physical isolation ability test of the service includes the following steps:

[0042] Step (4.1), during the end-to-end physical isolation ability test of the service, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence;

[0043] Step (4.2), configure N E1 services between the network element NE1 and the network element NE2 devices, and the paths are all network element NE1 - network element NE3 - network element NE4 - network element NE2, and N takes values of 1, 2, 3, or 4;

[0044] Use the same 10M fine-grained channel to carry, and configure fine-grained cross-connections for network element NE3 and network element NE4;

[0045] Step (4.3), test whether there are bit errors and alarms in the E1 service through the first SDH analyzer and the second SDH analyzer

[0046] Step (4.4), if the service is normal, test and record the one-way delay of the E1 service when N takes different values through the first SDH analyzer and the second SDH analyzer;

[0047] Step (4.5), configure N E1 services between the network element NE1 and the network element NE2 devices, and the paths are all network element NE1 - network element NE3 - network element NE4 - network element NE2, and N is 1 or 2 respectively; when N = 2, the two E1s are respectively mapped to two different 10M fine-grained channels, and NE3 and NE4 are configured with fine-grained cross-connections;

[0048] Step (4.6), test whether there are bit errors and alarms in the E1 service through the first SDH analyzer and the second SDH analyzer;

[0049] Step (4.7), if the service is normal, test and record the one-way delay of the E1 service when N takes different values through the first SDH analyzer and the second SDH analyzer;

[0050] Step (4.8), when in steps (4.3) and (4.6), when N takes different values, the E1 service is normal, the bit error rate is less than 10 7 , and there are no alarms;

[0051] Meanwhile, in steps (4.4) and (4.7), the one-way delay should be ≤ 15 ms, then the end-to-end physical isolation ability test of the service passes; otherwise, it fails.

[0052] Furthermore, preferably, when testing the end-to-end physical isolation ability of the service, if the one-end loopback method is adopted, then steps (4.4) and (4.7) become the loopback delay test for E1 service;

[0053] Step (4.8) becomes: when N takes different values in steps (4.3) and (4.6), the E1 service is normal, the bit error rate is less than 10 7 , and there are no alarms;

[0054] Meanwhile, in steps (4.4) and (4.7), the loopback delay should be ≤ 30 ms, then the end-to-end physical isolation ability test of the service passes; otherwise, it fails.

[0055] Furthermore, preferably, the service protection ability test includes the following steps:

[0056] Step (5.1), when testing the service protection ability, connect the first SDH analyzer, network element NE1, network element NE2, and the second SDH analyzer in sequence; network element NE3 is connected to network element NE1 and network element NE2 respectively;

[0057] Step (5.2), configure an E1 service between network element NE1 and network element NE2, and the path is network element NE1 - network element NE3 - network element NE2; use a 1×10 Mbps fine-grained channel to carry, configure fine-grained channel cross-connection on network element NE3, and configure the 1+1 protection mode for the fine-grained channel;

[0058] Step (5.3), test whether there are bit errors and alarms in the E1 service through the first SDH analyzer and the second SDH analyzer;

[0059] Step (5.4), interrupt the optical fiber between network element NE1 and network element NE3, and record the damage time of the E1 service;

[0060] Step (5.5), restore the optical fiber between network element NE1 and network element NE3, and record the damage time of the E1 service;

[0061] Step (5.6), power off the network element NE3 node, and record the damage time of the E1 service;

[0062] Step (5.7), restore the network element NE3 node, and record the damage time of the E1 service;

[0063] Step (5.8), when the E1 service is normal and the bit error rate is less than 10 as tested in step (5.3) 7, there is no alarm; and the E1 service damage time recorded in steps (5.4) to (5.7) is within 50 ms, then the service protection ability test passes; otherwise, it fails.

[0064] In the present invention, the network element preferably adopts an SPN device.

[0065] In the present invention, preferably, the SDH analyzer is connected to the customer-side CBR E1 interface board of the network element device, simulates the differential protection service device to send data, and at the same time the SDH analyzer can detect the number of successful data transmissions, the frame loss rate, the delay, and the jitter.

[0066] In the present invention, the CBR E1 container: The customer-side device accesses the SPN device CBR E1 board card in the 2M mode, and the customer-side service data maps the service-side data to the 10M small-granularity channel through the container in the CBR board card, and 1 container can contain 4 2Ms.

[0067] In the present invention, the fine-grained cross-connection is specifically: The small-granularity slice data stream enters from the westward interface of the device, is parsed into large-granularity cross-connections through the small-granularity cross-connection board, and after re-organizing the time slots through the small-granularity cross-connection, it is parsed into large-granularity cross-connections and sent out from the eastward interface of the device.

[0068] In the SPN slice physical isolation ability test and service bearing ability test of the present invention, the error code test time should be not less than 15 minutes; during the in-network test, the E1 service port of the network element NE2 can be looped back.

[0069] There are 5 types of 2M frame structures. The first is the non-frame structure, the second is PCM30, the third is PCM31, the fourth is PCM30 CRC, and the fifth is PCM31 CRC. The framing mode is PCM30 / PCM30 CRC / PCM31 / PCM31 CRC.

[0070] When testing the service end-to-end forwarding delay and jitter of the present invention, to ensure the same measurement accuracy of the two-way delay difference, it is recommended to use the same model of SDH tester in both directions.

[0071] The specific method of loopback at one end in the present invention is to adopt soft loopback or hard loopback on the E1 interface at one end.

[0072] When testing the service protection ability in the network of the present invention, the E1 service port of the network element NE2 can be looped back.

[0073] In the present invention, the service carrying capacity test includes the E1-E1 service carrying capacity test and the E1-cSTM-1 service carrying capacity test; during the E1-cSTM-1 service carrying capacity test, in step (2.2), the user side of network element NE2 also uses the VC12 interface of CSTM-1; where E1 refers to a 2M interface connected by coaxial cable, and E1-E1 means that both the source port and the sink port are E1 interfaces. cSTM-1 refers to a 155M channelized optical interface board, and 63 2Ms can be divided from one cSTM-1 interface. E1-cSTM-1 means that the source port is E1 and the sink port is one of the 2Ms divided from cSTM-1.

[0074] In the present invention, the service end-to-end forwarding delay and jitter test includes the E1-E1 service end-to-end forwarding delay and jitter test and the E1-cSTM-1 service end-to-end forwarding delay and jitter test; during the E1-cSTM-1 service end-to-end forwarding delay and jitter test, in step (3.2), the user side of network element NE2 also uses the VC12 interface of CST M-1;

[0075] In the present invention, the service end-to-end physical isolation ability test includes the E1-E1 service end-to-end physical isolation ability test and the E1-cSTM-1 service end-to-end physical isolation ability test;

[0076] In the present invention, the service protection ability test includes the E1-E1 service protection ability test and the E1-cSTM-1 service protection ability test.

[0077] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0078] The present invention provides a differential protection service carrying test method based on SPN technology. This method uses SPN CBR technology to achieve end-to-end physical isolation of service channels, improving service security compared with traditional CES simulation technology. In actual tests, the channel has almost no code, no alarm, and near-zero jitter, and the loopback test delay is less than 10 ms, fully meeting the requirements of differential protection services for the carrying channel.

[0079] The present invention completes the operation test of differential protection services on SPN devices through a 2M interface board based on CBR technology applicable to differential protection services and automation services; the present invention is a major breakthrough and innovation in the application of SPN technology in the power grid, filling the data gap in the operation test of such services in the network, providing new construction ideas for the construction of power communication networks in various regions, providing actual operation data support for the popularization and application of SPN technology in the power grid, and having significant application demonstration significance. Description of the Drawings

[0080] Figure 1Schematic connection diagram of the differential protection service bearing test device based on the SPN technology during the SPN slice physical isolation ability test;

[0081] Figure 2 Schematic connection diagram of the differential protection service bearing test device based on the SPN technology during the service bearing capacity test;

[0082] Figure 3 Schematic connection diagram of the differential protection service bearing test device based on the SPN technology during the service end - to - end forwarding delay and jitter test;

[0083] Figure 4 Schematic connection diagram of the differential protection service bearing test device based on the SPN technology configured in step (4.2) during the service end - to - end physical isolation ability test;

[0084] Figure 5 Schematic connection diagram of the differential protection service bearing test device based on the SPN technology configured in step (4.5) during the service end - to - end physical isolation ability test;

[0085] Figure 6 Schematic connection diagram of the differential protection service bearing test device based on the SPN technology for the service protection ability test. Detailed implementation manners

[0086] The present invention will be further described in detail below in conjunction with embodiments.

[0087] Those skilled in the art will understand that the following embodiments are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. For those not specifying specific techniques or conditions in the embodiments, the techniques or conditions described in the literature in this field or according to the product specifications shall be followed. For those materials or equipment without specifying the manufacturer, they are all conventional products that can be obtained by purchase.

[0088] Embodiment 1

[0089] A differential protection service bearing test method based on the SPN technology, which uses a differential protection service bearing test device based on the SPN technology; the differential protection service bearing test device based on the SPN technology includes a first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, a second SDH analyzer, and a data network analyzer;

[0090] The differential protection service bearing test method based on the SPN technology includes an SPN slice physical isolation ability test and a CBR service ability test; among them, the CBR service ability test includes a service bearing capacity test, a service end - to - end forwarding delay and jitter test, a service end - to - end physical isolation ability test, and a service protection ability test;

[0091] If the service carrying capacity test, service end-to-end forwarding delay and jitter test, service end-to-end physical isolation ability test, and service protection ability test all pass, then the CBR service ability test is qualified;

[0092] When both the SPN slice physical isolation ability test and the CBR service ability test are qualified, it is determined that the differential protection service can be carried; otherwise, the differential protection service cannot be carried.

[0093] Embodiment 2

[0094] A method for testing the bearing of differential protection service based on SPN technology, which uses a device for testing the bearing of differential protection service based on SPN technology; the device for testing the bearing of differential protection service based on SPN technology includes a first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, a second SDH analyzer, and a data network analyzer;

[0095] The method for testing the bearing of differential protection service based on SPN technology includes an SPN slice physical isolation ability test and a CBR service ability test; among them, the CBR service ability test includes a service carrying capacity test, a service end-to-end forwarding delay and jitter test, a service end-to-end physical isolation ability test, and a service protection ability test;

[0096] If the service carrying capacity test, service end-to-end forwarding delay and jitter test, service end-to-end physical isolation ability test, and service protection ability test all pass, then the CBR service ability test is qualified;

[0097] When both the SPN slice physical isolation ability test and the CBR service ability test are qualified, it is determined that the differential protection service can be carried; otherwise, the differential protection service cannot be carried.

[0098] The SPN slice physical isolation ability test includes the following steps:

[0099] Step (1.1), during the SPN slice physical isolation ability test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence; the data network analyzer is respectively connected to network element NE1 and network element NE2, as Figure 1 shown;

[0100] Step (1.2), configure 1G small-granularity slices in the network, configure an E1 service connection between network element NE1 and network element NE2 devices, map it to a 1×10 Mbps fine-grained channel through a CBR E1 service container for carrying, and associate the 10M fine-grained channel with the 1G small-granularity slice. The path is NE1-NE3-NE4-NE2, and configure fine-grained cross-connections for network element NE3 and network element NE4;

[0101] Step (1.3), configure a 2G packet slice in the network, configure an L3VPN service between network element NE1 and network element NE2 devices, and carry it using the remaining 479 10Mbps fine-grained channels in the same 1G small-granularity channel;

[0102] Step (1.4), test and verify that the E1 service signal is normal through the first SDH analyzer and the second SDH analyzer;

[0103] Step (1.5), send Ethernet service traffic from the data network analyzer, with the packet length being 1518 bytes respectively, the traffic bandwidth being 3Gbps, and the priority being EF, and record the one-way delay and jitter;

[0104] Step (1.6), record the delay and error code conditions of the E1 service of the first SDH analyzer and the second SDH analyzer;

[0105] Step (1.7), increase the Ethernet service traffic bandwidth sent by the data network analyzer to 8Gbps;

[0106] Step (1.8), record the delay and error code conditions of the E1 service of the first SDH analyzer and the second SDH analyzer;

[0107] Step (1.9), when testing the E1 service in step (1.4), the service bit error rate is less than 10 7 , without alarms;

[0108] And after the data network analyzer sends Ethernet service traffic in step (1.5), the Ethernet service traffic is normal, without packet loss and alarms;

[0109] And after the data network analyzer sends Ethernet service traffic in step (1.7), the Ethernet service is congested and packet loss occurs;

[0110] And when testing the E1 service in step (1.6) and step (1.8), the service bit error rate is less than 10 7 , without alarms, the one-way delay should be ≤15ms, and the loopback delay should be ≤30ms;

[0111] Then the SPN slice physical isolation ability test passes; otherwise, the test fails.

[0112] In step (1.5), the one-way delay includes the average delay, the maximum delay, and the minimum delay; the jitter includes the average jitter, the maximum jitter, and the minimum jitter.

[0113] The service bearing capacity test includes the following steps:

[0114] Step (2.1): During the service carrying capacity test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence, as Figure 2 shown;

[0115] Step (2.2): Configure an E1 service between network element NE1 and network element NE2, use a 1×10 Mbps fine-grained channel to carry it, map it into a CBR E1 service container, and the path is network element NE1 - network element NE3 - network element NE4 - network element NE2. Configure fine-grained cross-connections for network element NE3 and network element NE4;

[0116] Step (2.3): On both the first SDH analyzer and the second SDH analyzer, set the E1 signal load to the non-framed mode and the framed mode in sequence, and verify the normal E1 service signal through the first SDH analyzer and the second SDH analyzer;

[0117] Step (2.4): In the framed mode of the E1 signal, set the PRBS load of the two SDH analyzers to 2 9 -1, 2 15 -1, 2 20 -1, 2 23 -1 respectively, and test and verify the alarm and error conditions of the E1 signal;

[0118] Step (2.5): When in the tests of Step (2.3) and Step (2.4), the bit error rate of the E1 service is less than 10 7 , and there is no alarm, then the service carrying capacity test passes; otherwise, it fails.

[0119] The service end-to-end forwarding delay and jitter test includes the following steps:

[0120] Step (3.1): During the service end-to-end forwarding delay and jitter test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence, as Figure 3 shown;

[0121] Step (3.2): Configure an E1 service between network element NE1 and network element NE2, use a 1×10 Mbps fine-grained channel to carry it, map it into a CBR E1 service container, and the path is network element NE1 - network element NE3 - network element NE4 - network element NE2. Configure fine-grained cross-connections for network element NE3 and network element NE4;

[0122] Step (3.3): Through the first SDH analyzer and the second SDH analyzer, test and record the one-way delay of the E1 service, and calculate the two-way delay difference;

[0123] Step (3.4): Use the first SDH analyzer and the second SDH analyzer to test whether the output jitter and input jitter tolerance of the E1 service meet the standard requirements;

[0124] Step (3.5): When the one-way delay of the E1 service recorded in step (3.3), the one-way delay should be ≤ 15 ms; the two-way delay difference of the E1 service should be less than 200 us;

[0125] Meanwhile, if the jitter performance of the E1 interface tested in step (3.4) meets the requirements of YD / T 1420-2005, the end-to-end forwarding delay and jitter test of the service pass; otherwise, it fails.

[0126] When performing the end-to-end forwarding delay and jitter test of the service, if the one-end loopback method is adopted, then step (3.3) becomes testing the loopback delay of the E1 service, and the two-way delay difference is not calculated;

[0127] Step (3.5) becomes: Step (3.3) records the loopback delay of the E1 service, and the loopback delay should be ≤ 30 ms; meanwhile, if the jitter performance of the E1 interface tested in step (3.4) meets the requirements of YD / T 1420-2005, the end-to-end forwarding delay and jitter test of the service pass; otherwise, it fails.

[0128] The end-to-end physical isolation ability test of the service includes the following steps:

[0129] Step (4.1): When performing the end-to-end physical isolation ability test of the service, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence;

[0130] Step (4.2): Configure N E1 services between network element NE1 and network element NE2, and the paths are all network element NE1-network element NE3-network element NE4-network element NE2. N takes values of 1, 2, 3, or 4, as Figure 4 shown;

[0131] Use the same 10M fine-grained channel to carry, and configure fine-grained cross-connections for network element NE3 and network element NE4;

[0132] Step (4.3): Use the first SDH analyzer and the second SDH analyzer to test whether there are bit errors and alarms in the E1 service

[0133] Step (4.4): If the service is normal, use the first SDH analyzer and the second SDH analyzer to test and record the one-way delay of the E1 service when N takes different values;

[0134] Step (4.5): As Figure 5As shown, configure N E1 services between network element NE1 and network element NE2. The paths are all network element NE1 - network element NE3 - network element NE4 - network element NE2, where N is 1 or 2 respectively; when N = 2, the two E1s are respectively mapped to two different 10M fine-grained channels, and fine-grained cross-connections are configured for NE3 and NE4.

[0135] Step (4.6), use the first SDH analyzer and the second SDH analyzer to test whether there are bit errors and alarms in the E1 service.

[0136] Step (4.7), if the service is normal, use the first SDH analyzer and the second SDH analyzer to test and record the one-way delay of the E1 service when N takes different values.

[0137] Step (4.8), when in steps (4.3) and (4.6), when N takes different values, the E1 service is normal, the bit error rate is less than 10 7 and there are no alarms;

[0138] At the same time, in steps (4.4) and (4.7), the one-way delay should be ≤ 15ms, then the end-to-end physical isolation ability test of the service passes; otherwise, it fails.

[0139] When performing the end-to-end physical isolation ability test of the service, if the one-end loopback method is adopted, then steps (4.4) and (4.7) become testing the loopback delay of the E1 service.

[0140] Step (4.8) becomes: when in steps (4.3) and (4.6), when N takes different values, the E1 service is normal, the bit error rate is less than 10 7 and there are no alarms;

[0141] At the same time, in steps (4.4) and (4.7), the loopback delay should be ≤ 30ms, then the end-to-end physical isolation ability test of the service passes; otherwise, it fails.

[0142] The service protection ability test includes the following steps:

[0143] Step (5.1), when performing the service protection ability test, connect the first SDH analyzer, network element NE1, network element NE2, and the second SDH analyzer in sequence; network element NE3 is respectively connected to network element NE1 and network element NE2, as Figure 6 shown;

[0144] Step (5.2), configure one E1 service between network element NE1 and network element NE2. The path is network element NE1 - network element NE3 - network element NE2; use a 1×10Mbps fine-grained channel to carry it, configure fine-grained channel cross-connection on network element NE3, and configure the 1+1 protection mode for the fine-grained channel.

[0145] Step (5.3): Use the first SDH analyzer and the second SDH analyzer to test whether there are bit errors and alarms in the E1 service;

[0146] Step (5.4): Interrupt the optical fiber between network element NE1 and network element NE3, and record the damage time of the E1 service;

[0147] Step (5.5): Restore the optical fiber between network element NE1 and network element NE3, and record the damage time of the E1 service;

[0148] Step (5.6): Power off the network element NE3 node, and record the damage time of the E1 service;

[0149] Step (5.7): Restore the network element NE3 node, and record the damage time of the E1 service;

[0150] Step (5.8): When the E1 service is tested to be normal in step (5.3), the bit error rate is less than 10 7 , there are no alarms; and the damage times of the E1 service recorded in steps (5.4) to (5.7) are all within 50 ms, then the service protection ability test passes; otherwise, it fails.

[0151] The present invention has completed the first special research and development test in the country for the special power grid service - differential protection service, and established an application pilot.

[0152] The above has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A differential protection service bearing test method based on SPN technology, characterized in that, Adopt a differential protection service bearing test device based on SPN technology; the differential protection service bearing test device based on SPN technology includes a first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, a second SDH analyzer, and a data network analyzer; The differential protection service bearing test method based on SPN technology includes SPN slice physical isolation ability test and CBR service ability test; among them, the CBR service ability test includes service bearing ability test, service end-to-end forwarding delay and jitter test, service end-to-end physical isolation ability test, and service protection ability test; If the service bearing ability test, service end-to-end forwarding delay and jitter test, service end-to-end physical isolation ability test, and service protection ability test all pass, then the CBR service ability test is qualified; When both the SPN slice physical isolation ability test and the CBR service ability test are qualified, it is determined that the differential protection service can be carried; otherwise, the differential protection service cannot be carried.

2. The differential protection service bearing test method based on the SPN technology according to claim 1, wherein The SPN slice physical isolation ability test includes the following steps: Step (1.1), during the SPN slice physical isolation ability test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence; connect the data network analyzer to network element NE1 and network element NE2 respectively; Step (1.2), configure a 1G small granularity slice in the network, configure an E1 service connection between network element NE1 and network element NE2 devices, map it to a 1×10 Mbps fine-grained channel through a CBR E1 service container for bearing, associate the 10M fine-grained channel with the 1G small granularity slice, and the path is NE1-NE3-NE4-NE2. Configure fine-grained cross-connections for network element NE3 and network element NE4; Step (1.3), configure a 2G packet slice in the network, configure an L3VPN service between network element NE1 and network element NE2 devices, and bear it using the remaining 479 10 Mbps fine-grained channels in the same 1G small granularity channel; Step (1.4), test and verify that the E1 service signal is normal through the first SDH analyzer and the second SDH analyzer; Step (1.5), send Ethernet service traffic from the data network analyzer, with a packet length of 1518 bytes, a traffic bandwidth of 3 Gbps, and a priority of EF, and record the one-way delay and jitter; Step (1.6), record the delay and error code conditions of the E1 service of the first SDH analyzer and the second SDH analyzer; Step (1.7), increase the Ethernet service traffic bandwidth sent by the data network analyzer to 8 Gbps; Step (1.8), record the delay and error code conditions of the E1 service of the first SDH analyzer and the second SDH analyzer; Step (1.9), when testing the E1 service in step (1.4), the service bit error rate is less than 10 7 , without alarms; And after the data network analyzer sends Ethernet service traffic in step (1.5), the Ethernet service traffic is normal, without packet loss and alarms; And after the data network analyzer sends Ethernet service traffic in step (1.7), the Ethernet service becomes congested and packet loss occurs; And in steps (1.6) and (1.8), test the E1 service with the service bit error rate less than 10 7 , no alarm, the unidirectional delay should be ≤ 15 ms, and the loopback delay should be ≤ 30 ms; Then the SPN slice physical isolation ability test passes; otherwise, the test fails.

3. The differential protection service carrying test method based on the SPN technology according to claim 2, characterized in that In step (1.5), the one-way delay includes the average delay, the maximum delay, and the minimum delay; the jitter includes the average jitter, the maximum jitter, and the minimum jitter.

4. The differential protection service bearing test method based on the SPN technology according to claim 1, wherein The service bearing capacity test includes the following steps: Step (2.1): During the service bearing capacity test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence. Step (2.2): Configure an E1 service between network element NE1 and network element NE2, use a 1×10 Mbps fine-grained channel to carry it, map it into a CBR E1 service container, and the path is network element NE1-network element NE3-network element NE4-network element NE2. Configure fine-grained cross-connections for network element NE3 and network element NE4. Step (2.3): On both the first SDH analyzer and the second SDH analyzer, set the E1 signal load to the non-framed mode and the framed mode in sequence, and verify the normal E1 service signal through the first SDH analyzer and the second SDH analyzer. Step (2.4), in the E1 signal framing mode, set the PRBS loads of two SDH analyzers to 2 9 -1, 2 15 -1, 2 20 -1, 2 23 -1, and test and verify the alarm and error conditions of the E1 signal; Step (2.5), when in the tests of Step (2.3) and Step (2.4), the bit error rate of E1 service is less than 10 7 , and there is no alarm, the service carrying capacity test passes; otherwise, it fails.

5. The differential protection service bearing test method based on the SPN technology according to claim 1, wherein, The service end-to-end forwarding delay and jitter test includes the following steps: Step (3.1): During the service end-to-end forwarding delay and jitter test, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence. Step (3.2): Configure an E1 service between network element NE1 and network element NE2, use a 1×10 Mbps fine-grained channel to carry it, map it into a CBR E1 service container, and the path is network element NE1-network element NE3-network element NE4-network element NE2. Configure fine-grained cross-connections for network element NE3 and network element NE4. Step (3.3): Test and record the one-way delay of the E1 service through the first SDH analyzer and the second SDH analyzer, and calculate the two-way delay difference. Step (3.4): Test through the first SDH analyzer and the second SDH analyzer whether the output jitter and input jitter tolerance of the E1 service meet the standard requirements. Step (3.5): When the one-way delay of the E1 service recorded in step (3.3), the one-way delay should be ≤15 ms; the two-way delay difference of the E1 service should be less than 200 μs. At the same time, if the jitter performance of the E1 interface obtained by the test in step (3.4) meets the requirements of YD / T 1420-2005, the service end-to-end forwarding delay and jitter test passes. Otherwise, it fails.

6. The differential protection service bearing test method based on the SPN technology according to claim 5, characterized in that During the service end-to-end forwarding delay and jitter test, if the one-end loopback method is adopted, then step (3.3) becomes to test the loopback delay of the E1 service, and the two-way delay difference is not calculated. Step (3.5) becomes: The loopback delay of the E1 service recorded in step (3.3), the loopback delay should be ≤30 ms; at the same time, if the jitter performance of the E1 interface obtained by the test in step (3.4) meets the requirements of YD / T 1420-2005, the service end-to-end forwarding delay and jitter test passes. Otherwise, it fails.

7. The differential protection service bearing test method based on the SPN technology according to claim 1, wherein The service end-to-end physical isolation ability test includes the following steps: Step (4.1): When testing the end-to-end physical isolation ability of the service, connect the first SDH analyzer, network element NE1, network element NE3, network element NE4, network element NE2, and the second SDH analyzer in sequence. Step (4.2): Configure N E1 services between network element NE1 and network element NE2, with the path being network element NE1 - network element NE3 - network element NE4 - network element NE2. The value of N is 1, 2, 3, or 4. Carry them on the same 10M fine-grained channel, and configure fine-grained cross-connections for network elements NE3 and NE4. Step (4.3): Test whether there are bit errors and alarms in the E1 service through the first SDH analyzer and the second SDH analyzer. Step (4.4): If the service is normal, test and record the one-way delay of the E1 service when N takes different values through the first SDH analyzer and the second SDH analyzer. Step (4.5): Configure N E1 services between network element NE1 and network element NE2, with the path being network element NE1 - network element NE3 - network element NE4 - network element NE2. N is 1 or 2 respectively. When N = 2, the two E1s are respectively mapped to two different 10M fine-grained channels, and fine-grained cross-connections are configured for NE3 and NE4. Step (4.6): Test whether there are bit errors and alarms in the E1 service through the first SDH analyzer and the second SDH analyzer. Step (4.7): If the service is normal, test and record the one-way delay of the E1 service when N takes different values through the first SDH analyzer and the second SDH analyzer. Step (4.8), when different values of N are taken in steps (4.3) and (4.6), the E1 service is normal in all cases, and the bit error rate is less than 10 7 , and there are no alarms; Meanwhile, in steps (4.4) and (4.7), if the one-way delay is ≤ 15ms, the end-to-end physical isolation ability test of the service passes; otherwise, it fails.

8. The differential protection service bearing test method based on the SPN technology according to claim 7, characterized in that When testing the end-to-end physical isolation ability of the service, if the one-end loopback method is adopted, then steps (4.4) and (4.7) become testing the loopback delay of the E1 service. Step (4.8) becomes: When different values of N are taken in steps (4.3) and (4.6), the E1 service is normal in all cases, and the bit error rate is less than 10 7 , and there are no alarms; Meanwhile, in steps (4.4) and (4.7), if the loopback delay is ≤ 30ms, the end-to-end physical isolation ability test of the service passes; otherwise, it fails.

9. The differential protection service bearing test method based on the SPN technology according to claim 1, characterized in that The service protection ability test includes the following steps: Step (5.1): When testing the service protection ability, connect the first SDH analyzer, network element NE1, network element NE2, and the second SDH analyzer in sequence. Network element NE3 is respectively connected to network element NE1 and network element NE2. Step (5.2): Configure one E1 service between network element NE1 and network element NE2, with the path being network element NE1 - network element NE3 - network element NE2. Carry it on a 1×10Mbps fine-grained channel, configure fine-grained channel cross-connections on network element NE3, and configure the 1+1 protection mode for the fine-grained channel. Step (5.3): Test whether there are bit errors and alarms in the E1 service through the first SDH analyzer and the second SDH analyzer. Step (5.4): Interrupt the optical fiber between network element NE1 and network element NE3, and record the damage time of the E1 service. Step (5.5): Restore the optical fiber between network element NE1 and network element NE3, and record the damage time of the E1 service. Step (5.6): Power off network element NE3 node, and record the damage time of the E1 service. Step (5.7), the NE3 node of the network element is restored, and the damage time of the E1 service is recorded; Step (5.8), when it is tested in step (5.3) that the E1 service is normal and the bit error rate is less than 10 7 , and there is no alarm; and the E1 service damage time recorded from step (5.4) to step (5.7) is within 50 ms, then the service protection ability test passes; otherwise, it fails.

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