CN1414771A - Digital user line single end frequency response centralized automatic testing method and system - Google Patents
Digital user line single end frequency response centralized automatic testing method and system Download PDFInfo
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Abstract
An automatic testing method of certralized type for the frequency response at single end of digital user line sends the testing signal at the start end of digital user line with known accurate length and receives the reflection signal from the tail end of this user line, picking up and analysing this reflection signal for obtaining the transmission property. It further includes the issuing mechanism and the executing mechansm of test command being operated according to software program P, which the executing mechanism consists of main control unit with matrix unit connected by V.24; wide band test unit and matrix unit being connected with main control unit in-between by V.24 and copper twisted pair line. The method can be used for the centralized test and maintenance of network line equipment in telecommunication service organization.
Description
Technical fieldThe present invention relates to the communication line measuring technology, particularly in method of testing and system that arbitrary end of circuit all can independently be finished.
Background technologyAlong with popularizing rapidly and development of multimedia technology of network technology, the user is more and more higher to the requirement of bandwidth.DSL (digital subscriber line, Digital SubscriberLine) technology entered the high speed development stage in 2000, meanwhile, the test of broadband network and maintenance become the problem of operator's headache, particularly broadband network is complicated more compared with former traditional narrow telecommunications network, technology content is higher, therefore more becomes the problem of globalization, has seriously limited the development of broadband network.Traditional on the market narrowband test system as widely used 112 centralized test systems of China Telecom, all can not adapt to the needs that broadband services develops on technical performance still is function at present.
The system for testing telecommunication network that existing standard is used all at the narrow-band user design, can not be tested the broadband user basically.The method of testing of narrow bandline is to obtain subscriber's line by the switch test bus, the outside line that A, B line are formed is to measuring ten binomial routing indicators: A-B electric capacity, A-earth capacitance, B-earth capacitance, A-B resistance, A-earth resistance, B-earth resistance, A-B direct voltage, A-ground direct voltage, B-ground direct voltage, A-B alternating voltage, A-ground alternating voltage, B-ground alternating voltage, thereby judgement circuit situation.
Broadband user's circuit does not have automatic test mode at present, safeguards by craft substantially, therefore brings many problems, for example:
Open ADSL when professional the user, owing to can't judge that can the user open and supported bandwidth, so the engineering staff of operator will arrive the user and locate to verify, if problem then will be hurried back and forth repeatedly.In fact because line quality situation complexity has the considerable part user can't guarantee the ADSL service fulfillment.
Even after opening the ADSL business, if fault, as above the network speed rate low, frequently go offline, can't connect etc., then the attendant of operator need arrive the user and locate to check fault, even user's power supply power-fail also can't judge automatically in advance.
In the face of this problem, also there are some operators to adopt some other test or estimation means, comprising:
By judging subscriber's line length, calculate line quality, thereby estimate the broadband bearing capacity.Determination methods comprises by station address, postcode, or directly reads in the customer data base.Obviously, this method is insecure, and can only estimate line quality, can not judge circuitry obstacle.
Calculate by condenser type narrowband test system test data.Its character and first method are similar, calculate line length by capacitance, thus estimation of line quality and circuit bearing capacity.
By user side formula broadband test Meter Test.Some developed areas at home, used some broadband line test instrumentations, though the test effect is more accurate relatively, but all need manual operations and cooperate to user side, simultaneously test data can't record, can't combine with the miscellaneous service system of operator, therefore can not solve the substantial problem of xDSL installation and maintenance difficulty, it acts on only similar universal instrument.
Pass through test macro.The manufacturer that has has in the world released the broadband test system of experimental nature, comprises Turnstone, Spirent etc.The system of these manufacturers all adopts external matrix to insert, so cost cost height, and product installing engineering complexity need be carried out wire jumper to each broadband user again simultaneously.On the other hand, can't realize the pre-detection function.Therefore, these products only limit to experimental stage, do not possess practicality.
This shows that said method all is simpler and cruder and jejune.
Summary of the inventionThe present invention overcomes the above-mentioned weak point of prior art to propose a kind of single end frequency response formula Digital Subscriber Line automatic test approach, in order to constitute the centralized maintenance test of telecommunication operator to network line equipment, and can be used as existing network test macro according to telecommunication operator, carry out integratedly as the actual conditions of 112 centralized test systems of China Telecom, have functions such as service system interface, exchange interface, wide and narrow strip line test, the test of wide and narrow strip switching equipment and wide and narrow strip terminal test.
Purpose of the present invention can reach like this:
Design, the centralized automatic test approach of a kind of digital subscriber single end frequency response of employing, comprise the connection of testing equipment with the measured number user, especially send test signal at the Digital Subscriber Line top of knowing exact length, and in the reflected signal of same termination receipts from this subscribers feeder end, extract and analyze this reflected signal, draw the transmission characteristic of this subscribers feeder.
Design, the centralized Auto-Test System of a kind of digital subscriber single end frequency response is installed, comprises that test instruction sends mechanism and test instruction actuator; Especially described Auto-Test System is moved according to software program P; Described test instruction actuator comprises main control unit again and is attached thereto and by the Broadband Test Unit of single end frequency response mode work; Described test instruction actuator also comprises and the matrix unit of main control unit V.24 to link to each other; Also link to each other between described Broadband Test Unit and the matrix unit with copper twisted pair; Described test instruction is sent between mechanism and the test instruction actuator and is linked to each other with TCP/IP equipment.
Brief Description Of Drawings:
Fig. 1 is a single end frequency response formula automatic test approach schematic diagram of the present invention;
Fig. 2 is a broadband test schematic diagram in the described automatic test approach;
Fig. 3 is the ADSL histogram that the present invention relates to one of broadband services;
Fig. 4 is that described DMT is a Discrete multi-tone modulation work schematic diagram;
Fig. 5 is that the centralized Auto-Test System of the present invention constitutes schematic diagram;
Fig. 6 is the block diagram of the software program P of described centralized Auto-Test System operation;
Fig. 7 is the Internal Line Test schematic diagram of described centralized Auto-Test System;
Fig. 8 is the Loop test schematic diagram of described centralized Auto-Test System;
Fig. 9 is the terminal test schematic diagram of described centralized Auto-Test System;
Figure 10 is a subscriber's line narrow-band characteristic model schematic diagram;
Figure 11 is the frequency response curve of typical user's circuit.
Embodiment: below in conjunction with accompanying drawing in detail embodiments of the invention are described in detail.
The centralized automatic test approach of a kind of digital user line single end frequency response, comprise the connection of testing equipment with the measured number subscribers feeder, especially send test signal at the Digital Subscriber Line top of knowing exact length, and in the reflected signal of same termination receipts from this subscribers feeder end, extract and analyze this reflected signal, draw the transmission characteristic of this subscribers feeder.
Describedly know that the method for Digital Subscriber Line exact length is that TDR is a time domain reflection measurement method;
The transmission of described test signal receives and is finished by transmitting apparatus, receiving equipment respectively, and it connects conversion and is controlled by high speed electronic switch.
Described testing equipment inserts through the switch test bus with the connection of measured number subscribers feeder.
Described automatic test approach comprises the noise testing to Digital Subscriber Line, and loading test, FR are frequency response test and balance test; And to carry out DMT after above-mentioned test signal is handled be the Discrete multi-tone Modulation analysis;
Described automatic test approach also comprises current test data and historical data under the like environment that has deposited database in is compared, to determine current line quality of this user or loss situation.
The frequency of described test signal and pulsewidth can be regulated.The described test signal of present embodiment is provided with 512 frequency ranges altogether, and every band bandwidth is 4.3125KHz.
The centralized Auto-Test System of a kind of digital user line single end frequency response comprises that test instruction sends mechanism 1 and test instruction actuator 2; Especially described Auto-Test System is moved according to software program P;
Described test instruction actuator 2 comprises main control unit 21 again and is attached thereto and by the Broadband Test Unit 22 of single end frequency response mode work; The connected mode of this Unit two is for V.24;
Described test instruction actuator 2 also comprises and the matrix unit 23 of main control unit 21 V.24 to link to each other;
Also link to each other between described Broadband Test Unit 22 and the matrix unit 23 with copper twisted pair.
Described test instruction is sent between mechanism 1 and the test instruction actuator 2 and is linked to each other with TCP/IP equipment.
Described actuator 2 also comprises and the narrow bandline test cell 25 of main control unit 21 V.24 to link to each other; V.24, this actuator 2 is also to link to each other with tested switch 26.
Described narrow bandline test cell 25 also links to each other with Broadband Test Unit 22 with copper twisted pair, links to each other with tested switch 26 with copper twisted pair on the other hand.
Described test instruction is sent mechanism 1 and is comprised again with the interconnected Network Transmission center 11 of TCP/IP, turnkey console 12, testboard 13 and No. 112/1000 management system 14.Described No. 112/1000 management system 14 also links to each other with public telephone network.
Described Auto-Test System also comprises historical data base 3, quality condition and the loss situation of every pair of Digital Subscriber Line that this data-base recording has been tested under multiple environment.
System forms as shown in Figure 5.
The test instruction of the centralized Auto-Test System of digital user line single end frequency response of the present invention sends that mechanism 1 is that central apparatus mainly is the network common control equipment, the Network Management Equipment that is used to safeguard, the terminal equipment that is used to operate.Include: NTC is that Network Transmission center 11, CMS are that turnkey console 12 and TOS are testboard 13.It is online that Network Transmission center, turnkey console and testboard are installed in the center local that test macro safeguards, each other by network communication, they carry out communication with the local test equipment of each branch office by wide area office, special line (or dialing) MODEM, semipermanent mode such as be connected.
NTC is that high-grade servers are adopted at Network Transmission center 11, and running software and adopts large-scale relational database system (supporting Oracle, Sybase and Informix) under UNIX (supporting various main flow UNIX/LINUX operating systems) operating system.The Network Transmission center is the control centre of whole system of the present invention, all central apparatus, branch office's local device, and the communication of other system interface (as 112 system interfaces, nine No. seven wire system interfaces etc.) is all unified by the Network Transmission center processing.
Network Transmission centring system functional characteristics comprises:
(1) the Network Transmission center is the maincenter of built-in system (as test interface unit, testboard) and external system (as 112 systems, nine No. seven wire system, No. 1000 customer service center system etc.), can realize the concentrated interface control to all systems.By the standard agreement at Network Transmission center, each system, coupled degree is reduced greatly, guarantee the relative independentability of each several part, upgrade and revise more convenient;
(2) the Network Transmission center can receive outside or close beta request in real time, and has an automatic routing addressing function, can judge office direction, broadband switching equipment and type thereof, circuit types, test interface unit address of tested user etc. automatically, and generate corresponding test command thus automatically, be issued to test interface unit;
(3) the Network Transmission center is carried out centralized network management with turnkey console to system whole-network equipment, comprises alarm, loads, resets, function such as inquiry.Turnkey console provides the foreground user interface, and the Network Transmission center provides the backstage service.
CMS is that turnkey console 12 employings have the standard desktop microcomputer of mouse, keyboard, network interface card, and is furnished with MODEM, and running software is under Microsoft Windows 9x operating system.Webmastering software adopts Windows 9x graphical interfaces, realization is to management functions such as the user management of system of the present invention, data configuration, software loading, report form statistics, and, associated external equipment operation situations such as branch office's environmental parameter, network and switching equipment communication are monitored and alarm the centralized network management function of supervision, control and the maintenance of equipment.
The MODEM that connects does not generally use on the turnkey console, when needs carry out remote maintenance to system of the present invention or during by producer's technical solution problem, on turnkey console, start the respective remote Control Software, realize remote maintenance by MODEM system equipment of the present invention on this local network by computer of another operation remote maintenance software.
TOS is that testboard 13 adopts the standard desktop microcomputer that has mouse, keyboard, network interface card, and running software is under Microsoft Windows 9x operating system.Testboard software adopts the Windows9x graphical interfaces, realizes the function that any user in the network is tested automatically.
(1) obstacle deal with data, test data etc.
(2) system configuration data, system user data etc.
(3) user data, subscriber's line data, health account data and circuit model data etc.
The function of the centralized Auto-Test System of digital user line single end frequency response of the present invention is the test and the maintenance of broadband network, and the equipment of really finishing test and maintenance function all is installed in branch office, the module office machine room.
Native system test instruction actuator 2 is that branch office's Local test system equipment comprises that main control unit TIU is a test interface unit 21, this unit is the core of Local test system and central network interface tube, and modularization, structuring software have high reliability, flexible upgrading ability and allocative abilities.Its powerful disposal ability can satisfy the requirement of multidiameter delay test, example survey in enormous quantities, software and configuration parameter can be upgraded and revise by turnkey console, and center and remote maintenance by turnkey console can carry out full maintenance to test interface unit and subordinate's equipment thereof.
Main control unit is that the function characteristics of test interface unit 21 has:
(1) test interface unit can be managed multiple switching equipment simultaneously, and disposal ability reaches 100,000 narrow-band users or more than the 10000 xDSL users;
(2) flexible with the centring system interface mode, can be by digital special line, X.25, modes such as modulator-demodulator, frame relay connect.
(3) manage a plurality of testing equipments, integrated dispatch test resource and test target have bus scheduling mechanism and multipriority Task Distribution mechanism, treatment effeciency height to switching equipment;
(4) provide comprehensive maintenance function to test macro.
Narrow bandline test cell LTU 25 is high performance narrowband test platforms, adopts multiprocessor, multilevel distributed processing mode, has the characteristics of high-performance, high accuracy and high reliability.
The characteristic of narrow bandline test cell has:
(1) the narrow bandline test cell can carry out comprehensively quantitative, qualitative, assignment test to multiple objects such as narrow-band user circuit, exchanger user port, subscriber terminal equipments;
The access technology of (2) employing maturation, measuring technology, advanced person's Digital Signal Processing, very lagre scale integrated circuit (VLSIC), signal source and the whole digitlizations of test, test accurately, upgrading is convenient, and system has high stability and life-span, has centralized network management and maintenance function;
(3) cooperate with the centring system database,, test line is accurately analyzed by health account.
Broadband Test Unit BTU 22 is high performance broadband test platforms, the same characteristics with high-performance, high accuracy and high reliability with the narrow bandline test cell.
The characteristic of Broadband Test Unit has:
(1) Broadband Test Unit can carry out comprehensively quantitative, qualitative, assignment test to multiple objects such as broadband user's circuit, DSLAM user port, ADSLMODEM terminal equipments;
(2) cooperate with the centring system database,, test line is accurately analyzed by health account and circuit model.
Matrix unit RMU 23 disposes under a fairly large number of situation of test bus, and inserts automatically.A Local test system can not dispose, disposes one or more matrix units as required.
Matrix unit adopts serial communication with test interface unit in Local test system, the order that test interface unit will connect and disconnect p-wire is dealt into matrix unit, controls corresponding relays, with connection or disconnect tested switch 26.
The centralized automatic test approach principle of digital user line single end frequency response of the present invention is as follows:
Narrow-band characteristic model such as Figure 10 that user outline has.
The narrowband test function that comprises ISDN realizes by narrow bandline test cell LTU 25, its outside line, interior lines and terminal test principle such as Fig. 8, shown in Figure 7.
Broadband single-ended (local side) line test has following three purposes, that is, can circuit open ADSL; Can open, provide the speed that to support; Can not open or out of order, be out of order., need accurately test for this reason, following test events are arranged multiple twin copper cable physical layer:
1, single-ended frequency response (Frequency Response) test
2, single-ended noise (Noise) test
3, single-ended DMT test
4, inductance measurement
5, Longitudinal Balance Test
6, health account and circuit model
The core of automatic test approach of the present invention is single-ended frequency response test.The related Digital Subscriber Line type of this method has multiple, and wherein, xDSL adopts the different frequency section to handle the signal of different service types, because frequency has been widened, therefore can carry the more data signal than dialing modem.It is much wide that the 4kHz signal of the frequency ratio traditional voice transmission of digital service is wanted, and for example, ISDN and IDSL can reach 80kHz, and HDSL and SDSL can reach 400kHz, and ADSL can reach 1.5MHz.For the ADSL business, its histogram such as Fig. 3.Tradition needs both-end to cooperate and just can carry out the frequency response test, and an end sends signal in each frequency range, and the other end receives these signals and calculates the attenuation of circuit.
Principle of the present invention is to send test signal at the top of test line, test signal produces reflection at the end of circuit, receive the test signal that reflects at top, after certain filtration, identification, (CPU) carries out waveform processing by central processing unit, provides the result of frequency response test at last.Because test signal through whole tested subscribers feeder, therefore can reflect the transmission characteristic of circuit to the analysis of reflected signal.It realizes principle such as Fig. 1.The main Points that test realizes is as follows:
The frequency sound test result is the result of a frequency domain, so the frequency of test signal and pulsewidth can be regulated.The single end frequency response test as a frequency range, is tested 512 frequency ranges to 4.3125kHz altogether.
Because measured signal produces very big decay through the reflection back, becomes very faint, in order clearly to receive reflected signal, receiving circuit adopts very high multiplication factor.
In the signal that receiving circuit receives, except the test signal that reflects, also comprise the noise of circuit, when reflected signal is very faint, be submerged among the noise easily.For useful signal extraction is come out, adopt frequency, pulsewidth two-stage circuit to filter, identification.
Interfere with each other for fear of transmission, receiving circuit, adopt electronic switch to switch, in the time of need sending test massage, switch is switched to the transtation mission circuit side, when needing detected reflectance signal, switch is switched to the receiving circuit side;
For the precision that guarantees to measure, must determine the time t0 that electronic switch switches exactly, t0 equals the line length of twice divided by signal speed.Before the single end frequency response test, use the exact length of time domain reflection measurement (TDR) measurement circuit earlier.
The frequency response curve of typical user's circuit is seen Figure 11, and abscissa is represented frequency, and ordinate is represented decay.
Automatic test approach of the present invention also comprises single-ended noise testing.
Because of the frequency height of DSL transmission carrier frequency, generation noise easily is interfered.Circuit noise mainly comprises: signal is propagated the white Gaussian noise that electron motion produces; The induced noise of generation such as electric equipment, radio and crosstalking.The factor that produces of crosstalking is a lot, mainly comprises: disturb because the POTS that the SPL isolation performance causes is the Plain Old Telephone Service signal, as ring, dislodging machine etc.; Near-end cross (NEXT) that adjacent DSL line is right and far-end cross talk (FEXT); Other data services are as E1, right the crosstalking of isdn line.
Background noise when the high-frequency noise test provides the circuit channel idle comprises induced noise and crosstalks, and is convenient to further search the noise jamming source, improves the signal to noise ratio and the speed bearing capacity of circuit." route selection " problem when test of crosstalking has been solved that DSL opens promptly can be opened the demand pairs of DSL simultaneously in same main cable.
Automatic test approach of the present invention also comprises single-ended DMT test.
Discrete multi-tone modulation (DMT) is the modulation system of ADSL, adopts frequency multiplexing technique, and the frequency range below the 1.104Mhz is divided into 256 subchannels (tone), carries data respectively.The DMT test is by testing the bit rate that each subchannel can carry, provide maximum up (user is to local side) and descending (local side is to the user) speed that circuit can carry intuitively, for can circuit open ADSL, whether online normally stablizes provides the most direct reference.
G.992.1, ITU stipulates that each can carry 15bits from the passage maximum, but most ADSL MODEM manufacturer is in order to obtain better signal to noise ratio and transmission stability, bearing capacity is reduced to 14bits or 13bits, fully take into account this point during system design of the present invention, the result who makes measurement is more near actual value.
This shows, the transmission rate of higher each frequency range of DMT to be arranged for little and the circuit that noise is little of decay.And actual useful to operator, be total speed.Therefore, test decay (single-ended frequency response test) and the noise (single-ended noise testing) of each frequency range (4.3kHz), can calculate the speed that to carry on each frequency range, just obtain total speed of uplink and downlink after the summation according to aromatic theorem.
Automatic test approach of the present invention also comprises the load inductance test.
In the arrowband epoch, if the length of cable surpasses certain distance, in order to obtain the pad value of better transmission quality and regulation, when Telephone Cable is constructed, may take the mode of full loading, partial loading or local loading, to all or part of line to loading coil box or loading sleeve are installed.Inductance on the circuit has certain inhibitory action to the noise of high frequency, but for the DSL transmission, but is fatal " killer ", and loaded line can't be opened xDSL certainly.Whether the load inductance test can exist inductance on the detection line, then can in time be removed by person for testing and repairing if exist, and clears away the obstacles for opening xDSL.
The A-B impedance operator can change after increasing inductance, can judge the existence of inductance thus.
Automatic test approach of the present invention also comprises Longitudinal Balance Test.
The differential mode of two-wire system is adopted in the transmission of DSL, and differential mode has very strong inhibitory action to the common-mode noise of circuit.But more than design is based on the line impedance balance, and when the circuit longitudinal unbalance, common-mode noise will become destructive interference.The longitudinal balance degree of Longitudinal Balance Test measurement circuit, the reflection circuit is to the inhibition ability of common-mode noise.The result of Longitudinal Balance Test is the mode of frequency domain, can provide the longitudinal balance degree of each Frequency point.
When line balance, the impedance on A-ground and B-ground equates, if imbalance then numerical value can be different.Therefore, judge that A-ground and the impedance of B-ground can obtain the circuit longitudinal balance.
Automatic test approach of the present invention has also used health account and circuit model.
The telecommunications network test is the problem of a complexity, particularly broadband test, only from the situation of service cable test: region difference, warm and humid environment difference, material difference, cable properties difference, busy period difference or the like factor all can influence its test result, thereby the practicality of test macro not only require testing equipment accurately, reliable, more requiring has correct test data processing method rationally.For making system reach accurate, the practical purpose of test, need set up perfect health account and circuit model.
Health account in database, in the process of test, can be analyzed the characteristic records of each subscriber's line later at any time, thereby judges the quality of current circuit, and infers the loss situation.
Circuit model is on to a large amount of user health analysis file bases, judges the situation of this area's Typical Route, thereby provides circuit criterion and foundation.
By health account and these two kinds of methods of circuit model, can strengthen practicality of the present invention and applicability greatly, make that the present invention is applicable to various subscriber's line situations such as rainy weather, test such as when call is busy.
The broadband test function realizes by Broadband Test Unit 22; The Broadband Test Unit principle is seen Fig. 2.
With reference to Fig. 6, software program P comprises following system works flow process:
1) testboard: initiate test command.On the interface, import phone by the operator
Number, test-types, test parameter etc., testboard is tested according to certain agreement organizations
Order is issued to the Network Transmission center.
2) Network Transmission center: test routing forwarding.Receive the test of testboard
After the order, judge customer location according to telephone number and test routing table, and transmit and survey
Corresponding test interface unit is ordered in examination.
3) carry out main control unit: carry out test command.Receive the Network Transmission center
Test command, according to the test-types difference, be issued to corresponding narrow bandline test
Unit (narrowband test) or Broadband Test Unit (broadband test) are simultaneously with exchange
Test command is carried out in machine communication.
4) narrow bandline test cell: if the narrowband test order, then the arrowband is surveyed
The examination unit begins the user is tested.Behind the EOT, data are returned to execution
Main control unit.
5) Broadband Test Unit: if the broadband test order, then broadband test is single
Unit begins the user is tested.Behind the EOT, data are returned to the execution master control
The unit.
6) carry out main control unit: deal with data.Receive the test data of test cell
After, analyze automatically.If find it is special circuit situation, need visit healthy
Archives, then test interface unit is initiated the health account access request in the Network Transmission
The heart.
7) Network Transmission center: handle the health account visit.Receive and carry out the master control list
The health account visit order of unit, then data base querying is carried out at the Network Transmission center,
Associated user's health account returns to the execution main control unit by certain format.
8) carry out main control unit: return test result.According to test data and health
Archives are judged test result, and return to the Network Transmission center.
9) Network Transmission center: routing forwarding as a result.Receive and carry out main control unit
After the test result, the source according to test command is transmitted to test result accordingly
Testboard is noted down in database simultaneously.If valuable data, then certainly
The moving health account that upgrades.
10) testboard: the result shows.The mode handle that adopts figure and numeral to combine
Test result is presented on the user interface.
The advantage of native system is the wide and narrow strip integrated testing, and all test functions all are single simultaneously End is test automatically, need not user side and cooperates. Like this, greatly reduce the telecommunication network maintenance cost, Enhance competitiveness. Digital Subscriber Line Auto-Test System cost performance of the present invention is much better than at present online Homogeneous system. The experiment proved that the centralized automatic test of digital user line single end frequency response of the present invention System is compared with the prior art such as following table:
| Project | Prior art | The present invention |
| Test is suitable for the user | Narrow-band user | Broadband user and narrow-band user |
| The test operation mode | The both-end manual testing needs user side to cooperate, and is difficult to use | Single-ended automatic test need not user side and cooperates, and greatly is user-friendly to |
| But testing equipment | Only only limit to the subscribers' line narrow-band characteristic | Be applicable to all subscribers' lines (broadband and narrow-band characteristic), switch ports themselves, various terminals |
| User mode access | The manual access or external matrix, with high costs, the user operates inconvenience | System automatically inserts, and does not cooperate by hand, also can be without matrix, and cost is low, and the user is easy to use |
| Test accuracy | ＜70% (judging bandwidth by line length) | ＞95％ |
| Equipment cost | High (external matrix) | Low |
| Practicality | Do not possess the broadband practicality | Possesses the broadband practicality fully |
System of the present invention comprises the narrow bandline test macro simultaneously, and complete narrowband line drive test is provided The examination function comprises Loop test, Internal Line Test, terminal test. Therefore, system of the present invention can To substitute for example test function of 112 systems of narrow bandline test macro fully, realize wide, narrow Be with integrated test platform.
System of the present invention for the broadband DSL road provide advanced xDSL (comprise ADSL, VDSL, HDSL etc.) test function can by single-ended, generally be local side test, accurately branch Analyse phenomenons such as orienting load inductance in the circuit, bridge joint, tap, noise to the shadow of wideband transmit Ring, and provide accurate line bandwidth bearing capacity. For broadband digital subscriber port and user Terminal device provides ADSL interior lines and ADSL terminal test function.
The present invention has the multiple test function of Maintenance Oriented:
For the user who does not open ADSL, system of the present invention can carry out preanalysis, by circuit model and narrowband test data the whole network user is carried out the automatic screening classification, judges whether each user can open the ADSL business.Can make the attendant grasp the circuit situation of the whole network like this, all be unusual Useful Information for business consultation, popularization etc.
For the user who prepares to install ADSL, can accurately measure this subscriber's line by above test and can open broadband services, and the speed that can carry, also support the wire jumper situation of automatic inspection distributing frame simultaneously, avoid the wire jumper mistake, thereby carry out broadband services fast and effectively.
Wide, narrow-band user for fault Shen announcement, by above test, nature of trouble and position can accurately be located and demonstrate in system, and for example user terminal fault, line fault, local side user port fault still are the internet data transmission fault, repaiies service level and efficient thereby effectively improve to look into.
For the large tracts of land user, the routine test function by system can regularly detect its circuit and equipment situation, realizes that preliminary examination repaiies in advance, effectively reduces the subscriber complaint rate, improves service level, and has also accumulated valuable data to line upkeep work simultaneously.
The present invention has the system configuration of open standard, adopts the ICP/IP protocol interconnection between system equipment.Network can adopt various communication modes to form, as digital special line, X.25, the wide area network that constitutes such as frame relay, or adopt modes such as modem dialup, ISDN to insert.
System of the present invention has the open service system interface, can with service system such as China Telecom's 112 centralized test systems of telecom operators, or No. 1000 customer service center system slitless connections, multiple docking modes such as supported protocol mode, database mode, API mode and modularity.
The present invention also has powerful equipment and network monitoring function, and system has adopted the mentality of designing of centralized network management, can carry out attended operations such as fault warning, Stateful Inspection, software loading and data configuration to equipment all on the whole local network.And all important operations all have system journal record, and can conveniently consult
System of the present invention provides networking mode flexibly, centring system is that test instruction is sent the networking of mechanism 1 with Network Transmission center (NTC, Network Transmission Center) be core, Local test system is with test interface unit (TIU, Test Interface) is core, have fabulous network-adaptive, can insert by DDN, X.25, the wide area network that constitutes such as special line, DCM, dial line.Wide Area Network interface adopts common apparatus and standard softwares such as router, the communication server.The ICP/IP protocol of standard is adopted in communication, and software has verification, retransmits controlling mechanism, has guaranteed reliability under the prerequisite of flexibility that makes full use of ICP/IP protocol and high efficiency advantage.
Consider communication network complex apparatus, circuit situation, system of the present invention has multiple functional module, comprise the high-performance test platform that constitutes for core with Broadband Test Unit (BTU, Broadband Test Unit) and line test unit (LTU, Line Test Unit).
Claims (10)
1, the centralized automatic test approach of a kind of digital user line single end frequency response comprises the connection of testing equipment with the measured number subscribers feeder,
It is characterized in that:
Send test signal at the Digital Subscriber Line top of knowing exact length, and, extract and analyze this reflected signal, draw the transmission characteristic of this subscribers feeder in the reflected signal of same termination receipts from this subscribers feeder end.
2, automatic test approach according to claim 1 is characterized in that:
Described testing equipment inserts through the switch test bus with the connection of measured number subscribers feeder.
3, automatic test approach according to claim 2 is characterized in that:
Describedly know that the method for Digital Subscriber Line exact length is that TDR is a time domain reflection measurement method;
The transmission of described test signal receives and is finished by transmitting apparatus, receiving equipment respectively, and it connects conversion and is controlled by high speed electronic switch.
4, automatic test approach according to claim 3 is characterized in that:
Described automatic test approach comprises the noise testing to Digital Subscriber Line, loading test, FR (explanation) test and balance test; And to carry out DMT after above-mentioned test signal is handled be the Discrete multi-tone Modulation analysis;
Described automatic test approach also comprises current test data and historical data under the like environment that has deposited database in is compared, to determine current line quality of this user or loss situation.
5, automatic test approach according to claim 4 is characterized in that:
The frequency of described test signal and pulsewidth can be regulated.
6, automatic test approach according to claim 5 is characterized in that:
Described test signal is provided with 512 frequency ranges altogether, and every band bandwidth is 4.3125KHz.
7, the centralized Auto-Test System of a kind of digital user line single end frequency response comprises that test instruction sends mechanism (1) and test instruction actuator (2); It is characterized in that:
Described Auto-Test System is moved according to software program P;
Described test instruction actuator (2) comprises main control unit (21) again and is attached thereto and by the Broadband Test Unit (22) of single end frequency response mode work; The connected mode of this Unit two is for V.24;
Described test instruction actuator (2) also comprises and the matrix unit (23) of main control unit (21) V.24 to link to each other;
Also link to each other between described Broadband Test Unit (22) and the matrix unit (23) with copper twisted pair;
Described test instruction is sent between mechanism (1) and the test instruction actuator (2) and is linked to each other with TCP/IP equipment.
8, Auto-Test System according to claim 7 is characterized in that:
Described actuator (2) also comprises and the narrow bandline test cell (25) of main control unit (21) V.24 to link to each other; V.24, this actuator (2) is also to link to each other with tested switch.
Described narrow bandline test cell (25) also links to each other with Broadband Test Unit (22) with copper twisted pair.
9, Auto-Test System according to claim 8 is characterized in that:
Described test instruction is sent mechanism (1) and is comprised again with the interconnected Network Transmission center (11) of TCP/IP, turnkey console (12), testboard (13) and No. 112/1000 management system (14).
10, Auto-Test System according to claim 9 is characterized in that:
Described Auto-Test System comprises that also record tested the quality condition of every pair of Digital Subscriber Line under multiple environment and the historical data base (3) of loss situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021257051A CN100484165C (en) | 2002-08-13 | 2002-08-13 | Digital user line single end frequency response centralized automatic testing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021257051A CN100484165C (en) | 2002-08-13 | 2002-08-13 | Digital user line single end frequency response centralized automatic testing system |
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| CN1414771A true CN1414771A (en) | 2003-04-30 |
| CN100484165C CN100484165C (en) | 2009-04-29 |
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| CNB021257051A Expired - Fee Related CN100484165C (en) | 2002-08-13 | 2002-08-13 | Digital user line single end frequency response centralized automatic testing system |
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| CN (1) | CN100484165C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333555C (en) * | 2005-05-11 | 2007-08-22 | 华为技术有限公司 | Method for testing network transmission line using time-domain signal |
| CN100456839C (en) * | 2003-07-12 | 2009-01-28 | 华为技术有限公司 | A testing system of digital subscriber line and testing method |
| CN100579147C (en) * | 2006-06-20 | 2010-01-06 | 中兴通讯股份有限公司 | Filtration method for processing alarm rapidly |
| US7804940B2 (en) | 2003-07-12 | 2010-09-28 | Huawei Technologies Co., Ltd. | Subscriber line testing system, broadband line card and broadband/narrowband telecommunication system |
| CN1674458B (en) * | 2004-03-23 | 2010-11-03 | 华为技术有限公司 | Testing method for digital user line and local side wideband equipment |
| CN1960402B (en) * | 2005-09-06 | 2012-05-23 | 阿尔卡特公司 | Method to detect missing filter/splitter and apparatus for performing such a method |
| CN101454681B (en) * | 2006-03-31 | 2012-06-27 | 安立股份有限公司 | Signal-under-test analyzing device |
| CN1863244B (en) * | 2005-10-28 | 2013-10-02 | 华为技术有限公司 | Method and apparatus for time-domain reflecting measurement of transmission line |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2281208A1 (en) * | 1999-08-31 | 2001-02-28 | Nortel Networks Corporation | Single-ended subscriber loop qualification for xdsl service |
-
2002
- 2002-08-13 CN CNB021257051A patent/CN100484165C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100456839C (en) * | 2003-07-12 | 2009-01-28 | 华为技术有限公司 | A testing system of digital subscriber line and testing method |
| US7804940B2 (en) | 2003-07-12 | 2010-09-28 | Huawei Technologies Co., Ltd. | Subscriber line testing system, broadband line card and broadband/narrowband telecommunication system |
| CN1674458B (en) * | 2004-03-23 | 2010-11-03 | 华为技术有限公司 | Testing method for digital user line and local side wideband equipment |
| CN1333555C (en) * | 2005-05-11 | 2007-08-22 | 华为技术有限公司 | Method for testing network transmission line using time-domain signal |
| CN1960402B (en) * | 2005-09-06 | 2012-05-23 | 阿尔卡特公司 | Method to detect missing filter/splitter and apparatus for performing such a method |
| CN1863244B (en) * | 2005-10-28 | 2013-10-02 | 华为技术有限公司 | Method and apparatus for time-domain reflecting measurement of transmission line |
| CN101454681B (en) * | 2006-03-31 | 2012-06-27 | 安立股份有限公司 | Signal-under-test analyzing device |
| CN100579147C (en) * | 2006-06-20 | 2010-01-06 | 中兴通讯股份有限公司 | Filtration method for processing alarm rapidly |
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| Publication number | Publication date |
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