CN101114879A - Link failure diagnosis device of hand-hold passive optical network - Google Patents
Link failure diagnosis device of hand-hold passive optical network Download PDFInfo
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Abstract
The invention relates to a failure diagnostic device for a passive optical network (PON) link, which comprises the following parts: an optical signal processing subsystem, a PON subsystem, a processor (CPU) subsystem, a user interface (I/O) subsystem, a business interface subsystem, a clock subsystem and a power subsystem. The primary function of the device comprises the physical layer testing, link layer testing, business layer testing of the PON interface and the display, record and preservation of the testing results. The device of the invention has distinct characteristics and advantages that: firstly, the device can make overall monitoring to the link situation of the PON system and all kinds of key parameters and can clearly position every failure of the PON system; secondly, the device is a handheld device with simple and flexible operation, which is suitable for the installation of the PON network equipments, project acceptance and maintenance applications; thirdly, a modularized structure can provide different testing functions by adding the VoIP business modules and IPTV business modules.
Description
Technical field
The present invention relates to passive optical network (xPON), more specifically, the present invention relates to a kind of EPON (xPON) link failure diagnosis device that is used for network operation.
Background technology
The PON technology is the emerging broadband passive optical network technology based on Ethernet.Its essence is the extension of Ethernet in the Access Network field.By the extensively good main flow PON technology of industry Ethernet passive optical network (EPON), Gigabit-capable Passive Optical Network (GPON) and Wave division multiplexing passive optical network (WDM-PON) etc. are arranged at present.On the whole, advantage such as the PON technology has that power system capacity is big, cost is low,, technology maturation good to the data business support and maintenance are simple is one of ideal scheme of realizing FTTX.At present, the EPON system has begun the scale commercialization, and also near ripe, it is commercial progressively to begin examination for GPON.Along with the sizable application of EPON and GPON, will inevitably produce the PON network operation and maintenance issues.Therefore need have failure diagnosis tool, so that carry out network installation easily and maintenance.
Physically, EPON (comprising EPON, GPON etc.) system is a point-to-multipoint configuration, each optical line terminal (OLT:Optical Line Terminal, be the local side apparatus in the PON system) connect a plurality of optical network unit (ONU by Optical Distribution Network (ODN:Optical Distribution Network), Optical Network Unit is the ustomer premises access equipment in the PON system).Since at the optical interface of the OLT of PON system corresponding to a plurality of ONU, if link or the business relevant with certain ONU break down, adopt the insertion type network test equipment to cause the business of other ONU also to be affected easily, therefore can't implement simple insertion type diagnosis, also just can't monitor and analyze being related to the Link State that system whether can operate as normal.
In existing testing apparatus, the instrument and meter that can be used in the PON network mainly contains light power meter (as the PPM-350B of EXFO company production) and performance evaluation instrument (as the N2X that is used for the EPON protocal analysis of Agilent company production).The former is a portable equipment, uses simply, but function is very limited, can only be used on the measuring optical fiber link certain any two-way received optical power, thereby can not satisfy the requirement that the link good working condition is monitored.The latter more lays particular emphasis on the message of catching on the link in function aspects, can not show analysis result in real time, and be non-portable set the line status key parameter, need with specific PC and the supporting use of software, carry and use very inconveniently, be not suitable for on-site maintenance.
In the PON network, two parts of fault probability of happening maximum are respectively ONU and branch road optical fiber link.In view of these characteristics, if a trouble-shooter is arranged, can substitute the ONU that has fault, and carry out functions such as optical link index measurement, the process analysis of PON agreement, service attribute analysis, then can improve the maintenance efficiency of PON system to a great extent.
Summary of the invention
At the problem that does not have portable PON link monitoring device at present, the handheld test device of a kind of PON of being used for network link status analysis and failure diagnosis has been proposed.
The device of hand-hold type PON link failure diagnosis of the present invention consists of the following components: light signal processing subsystem, PON subsystem, processor (CPU) subsystem, user interface (I/O) subsystem, Service and Interface, Clock Subsystem and power subsystem.Annexation between each subsystem as shown in Figure 3.The concrete function of above-mentioned each subsystem is as follows:
The light signal processing subsystem sends to the PON subsystem after the signal of telecommunication is measured and be translated into to the optical parameter (as luminous power) of the downlink optical signal that receives, and the measurement result of light path parameter then sends to processor subsystem; On the other hand, the also responsible code stream (signal of telecommunication) that the PON subsystem is sent of light signal processing subsystem is converted to the light signal that meets the PON system requirements and sends to the PON optical link.The light signal processing subsystem is made up of PON ONU sidelight module, luminous power detection module.Optical Power Monitor Module is carried out optical power monitoring by the light signal from input signal branch fixed proportion, and other light signal enters ONU sidelight module.ONU sidelight module is carried out the optical module identical functions with common ONU, and the light signal that is about to receive is converted to the signal of telecommunication and gives PON subsystem, and the code stream of the electricity that the PON subsystem is sent here sends to the PON optical interface after being converted to light signal simultaneously.A part of light signal that photo-detector is given it by the monitoring optical branching device carries out optical power monitoring, and monitoring result is sent to processor (CPU) subsystem.ONU sidelight module links to each other with the PON subsystem by bus.Also link to each other between photo-detector module and processor (CPU) subsystem, handle so that give cpu subsystem with the result of optical power monitoring by the CPU peripheral bus.
The PON subsystem is the leitungskern part of apparatus of the present invention.It carries out function and the ONU state and the link detecting function of PON ONU simulator (can be EPON ONU simulator, also can be GPON ONU simulator, can also be WDMPON ONU simulator).The PON subsystem is accepted the instruction of processor subsystem on the one hand, finish discovery and the registration (comprising the registration of MAC control/Transmission Convergence TC sublayer and the registration of operational management and maintenance-OAM layer) of ONU, and accept OLT it is carried out the Remote configuration (being the function of the ONU of a standard of emulation) of link layer, operation layer and management level, and give the light signal processing subsystem with various controls and administrative message.Simultaneously, the PON subsystem by mode of operation determine whether transmitting variety of protocol data message or common ethernet data frame to the Service and Interface mouth (if instrument is in " bridge mode ", then the PON subsystem is carried out common data service message forwarding, so that PC can be by the operation such as surf the Net of this device; If instrument is in " mirror image pattern ", then the PON subsystem is mirrored to the GE mouth selectively with information such as controlling links and management agreement data messages, exports to external computer and utilizes special software to be further analyzed).On the other hand, it is also monitored the state of this ONU emulation module, the various ethernet frames that receive from the light signal processing subsystem (are comprised common ethernet data frame, the MPCP protocol frame of EPON system or the GTC of GPON system (the Transmission Convergence GEM TC of GPON framed mode) frame, the Operation, Administration and Maintenance OAM frame of EPON system or the ONU telemanagement of GPON system and control interface OMCI frame etc.) handle and analyze, analyze the state and the relevant parameter of controlling links and management function, and with analysis result preservation and notification processor subsystem, and then obtain for link failure and diagnose very important data.Specifically, it is responsible for finishing following function:
1) under the control of processor subsystem, initiates registration, the authentication of ONU simulator, and accept OLT and it is carried out telemanagement (organize content comprises that downlink data encryptions, DBA parameter configuration, essential information report, Port Management, vlan management, multicast management, QoS are managed etc.) according to specific user's SLA attribute;
2) extract the link layer state information of its ONU simulator, give processor subsystem with data after treatment; Mainly comprise following aspect:
● the current state of the mac layer of ONU (as the MPCP sublayer of EPON system) or transmission convergence layer (as the GTC sublayer of GPON system) state machine;
● according to IEEE 802.3-2005 section 5 or ITU-T G.984 or the OAM Protocol Data Unit (EPON) of other standards (as the OAM standard of particular organization expansion) regulation or OMCI message (GPON) form and implication analyze the state of its Operation, Administration and Maintenance function;
3) extract the parameter information of link layer, operation layer and OAM layer that this ONU simulator obtains, send to processor subsystem after handling by analysis; Mainly comprise:
● calculate the descending reception error rate;
● from the MPCP message of catching or GTC frame, extract the link layer parameter such as (Sync Time) lock in time of OLT;
● show that OLT is the LLID of this device distribution or the value of Port ID;
● calculate the wrong frame per second of descending reception;
● the MAC control protocol message on the EPON system link (as the MPCP frame of EPON system or the GTC frame on the GPON system link) is added up;
● the Operations, Administration and Maintenance on the EPON system link (as the OAM of EPON system or the OMCI of GPON system) message is added up;
● calculate upstream bandwidth that this device obtains and DBA dispatching cycle;
● show the upstream queue state of ONU this locality;
● traffic frame is added up, comprised unicast frame, multicast frame and broadcast frame;
4) data forwarding function comprises:
● MAC control protocol message (MPCP or GTC) and OAM message (perhaps OMCI message) are carried out mirror image control, as: the bidirectional frame on the link is stamped the time tag that receives, merge into a stream then, filter on request again, be forwarded to the output of GE mouth at last;
● to the forwarding capability of common data message.Promptly carry out two layers of forwarding, thereby make the user can utilize this device to realize interim online for common data message, whether normal with the operation layer function of verification system.
The PON subsystem generally is made up of Core Feature chip, cache module, PON oral-lateral physical layer block (as Serdes) and the business interface physical layer block (as PHY) of PON (EPON or GPON or other PON technology).The annexation of these modules is as follows: PON oral-lateral physical layer block links to each other with the PON acp chip by bus, and buffer memory is the SDRAM memory, links to each other with the PON acp chip by bus.Business interface side physical layer block links to each other with the PON acp chip by gmii interface.
Processor subsystem is the control core of apparatus of the present invention, is the central controller of whole device.Processor subsystem is being controlled other subsystems (mainly being light signal processing subsystem, PON subsystem and Service and Interface etc.) in this device on the one hand, comprises the mode of operation that disposes other functional subsystems and parameter, generation and handles the test pack (for example carry out the PPPoE dialing, initiate the test of Ping bag and testing result, FTP test, VoIP test, IPTV test etc.) etc. of upper-layer protocol.On the other hand, it also is responsible for receiving the information such as analysis result from instruction, configuration information, Link State and the parameter of relevant other functional subsystems acquisitions, after further handling then the result outputed to other functional subsystems such as user interface subsystem, the latter then shows.In addition, cpu subsystem is also supported the recorded and stored of test result and checking of historical test result.Processor subsystem generally is made up of CPU, BOOT ROM, MEMORY and four modules of FLASH.Wherein CPU is used for the work of operating software with control apparatus of the present invention, and BOOTROM is used to deposit the start-up code of CPU, the memory that MEMORY uses for CPU software, and FLASH then is used for preserving the software version of apparatus of the present invention.As follows with the annexation between above-mentioned each module: CPU is the control core, and it links to each other with FLASH with BOOTROM, SDRAM respectively by address, DCB.
User interface subsystem is responsible for finishing mutual between apparatus of the present invention and the user.User interface subsystem shows that on the one hand link is measured and the result of diagnosis, also can be configured by the mode of operation of processor subsystem to apparatus of the present invention on the other hand.It is divided into three modules: a module is a display control module, is made up of LCD display and display control chip; LCD display wherein links to each other with display control chip, the control of controlled chip, and display control chip self then links to each other with CPU in the processor subsystem by bus, controlled by CPU.Another module is the Keyboard Control module, and it is made up of keyboard and keyboard control chip.Keyboard links to each other with keyboard control chip, is subjected to the control of keyboard control chip, and keyboard control chip then links to each other with CPU in the processor subsystem by bus, controlled by CPU.The 3rd module is LED light, and it is made up of one group of LED, is used to refer to the basic status (whether light signal, MAC Link State be normal as whether detecting, the OAM link is whether normal etc.) of PON link layer.These indicator lights link to each other with processor subsystem with the light signal processing subsystem by holding wire respectively.The user can be provided with the mode of operation of apparatus of the present invention and the information content of selecting demonstration by operation keyboard, can check the result of link monitoring then by LCD display.In addition, the user can also be known the basic status of current link by checking LED light.
Service and Interface mainly is and user terminal interface functions such as PC, telephone set, set-top box, be responsible for finishing the professional adaption function of user terminal and PON subsystem, mainly comprise Ethernet/IP operation adaption function, VoIP business simulating function, IPTV copying etc.Simultaneously, it also accepts the control of processor subsystem.Service process subsystem provides Gigabit Ethernet or 100 m ethernet (FE) electrical interface, telephony interface (RJ-11), IPTV interface (Ethernet interface of junctor top box).Service and Interface adopts modular construction, can adorn different module (for example VoIP business simulating module and IPTV business simulating module) according to different demand choosings, and processor subsystem is controlled each module execution content measurement separately.
Other subsystems that Clock Subsystem is responsible in apparatus of the present invention provide clock signal.It is made up of clock chip and clock distribution network.Its annexation is as follows: clock chip outputs to clock distribution network, through the processing of clock distribution network, exports multiple clock signals of different frequencies again, and then flows to each chip of other subsystems by holding wire.
Power subsystem is responsible for that other subsystems provide specific direct voltage in apparatus of the present invention.This subsystem is made up of storage battery, power supply processing module and power distribution network.Power supply processing module is responsible for the DC power supply that the outside provides is handled, and generating the needed multiple voltage of different chips, voltage distribution network then is responsible for the output of power supply processing module is distributed to each chip in other subsystems by holding wire.The power available of apparatus of the present invention is divided into two kinds: the one, and adopt storage battery (can be rechargeable battery, also can disposable storage battery) that DC power supply directly is provided; The one, adopt external transformer to provide and exchange the power supply that changes direct current.
In sum, the major function of this device comprises:
1) physical layer of PON interface test (the descending luminous power that receives as test, the error rate etc.);
2) PON link layer test (comprising MPCP or GTC layer state, OAM or OMCI state and link layer parameter etc.);
3) operation layer test (comprising data service test, voice service test, IPTV operational trials etc.);
4) support the recorded and stored of test result and checking of historical test result.
Therefore, the present invention has realized following technique effect:
Compare with existing apparatus, device of the present invention has outstanding feature and advantage: the one, and apparatus of the present invention are that PON Link State and various key parameter have been carried out more fully monitoring, positioning optical waveguides fault, ONU fault, IAD or set-top box failure, broadband network fault etc. have clearly been filled up the blank of present PON system performance monitoring and failure diagnosis tool aspect; The 2nd, apparatus of the present invention are portable equipment, can carry, and are simple to operate flexible, and intuitive display is fit to the installation of the PON network equipment, the acceptance of work and maintenance application very much.The 3rd, apparatus of the present invention adopt modular construction, can provide different test functions with the IPTV business module by increasing the VoIP business module.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the PON network topology.
Fig. 2 is the application mode schematic diagram of apparatus of the present invention.
Fig. 3 is the structured flowchart of apparatus of the present invention.
Fig. 4 is the schematic appearance of an embodiment of apparatus of the present invention.
Fig. 5 is the internal structure block diagram of an embodiment of apparatus of the present invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
The present invention is directed to the problem that does not have portable PON link failure diagnosis device at present, the handheld apparatus of a kind of PON of being used for network link status monitoring and failure diagnosis is provided.
Fig. 1 has introduced the PON topology network relevant with apparatus of the present invention.As can be seen from the figure, can be connected with a plurality of ONU by optical splitter under an OLTPON mouth.Downlink data load mode from OLT to ONU is time-multiplexed physical layer broadcast mode, and promptly each downlink frame can send to the PON port of all ONU.Upstream data load mode from ONU to OLT is TDMA (to an EPON and GPON) mode, and promptly each ONU sends upstream data in OLT distributes to the ascending time slot that oneself uses.
Fig. 2 has introduced the typical application mode of apparatus of the present invention, is about to this device and is connected to light passive distribution network and gets on, and replaces the ONU that there is fault or may has fault, utilizes this device to carry out Fault Diagnosis and location then.
Fig. 3 is the structured flowchart of apparatus of the present invention.Apparatus of the present invention are made up of light signal processing subsystem (201), PON subsystem (202), processor (CPU) subsystem (205), user interface (I/O) subsystem (204), Service and Interface (203), Clock Subsystem (206) and power subsystem (207) etc.Wherein, between Clock Subsystem (206) and power subsystem (207) and other subsystems annexation is arranged all, these connections of not drawing in the drawings for the sake of simplicity.
This groundwork flow process of installing various modules is: light signal processing subsystem (201) sends to PON subsystem (202) after on the one hand the light signal that receives from the PON link being carried out the light path parameter measurement and is converted into the signal of telecommunication, and the measurement result of light path parameter sends to processor subsystem (205).On the other hand, the code stream (signal of telecommunication) also PON subsystem (202) sent of light signal processing subsystem (201) is converted to light signal and sends to the PON optical link.PON subsystem (202) is handled and is analyzed the various ethernet frames and the protocol data message (comprising mac layer (MPCP/GTC) protocol frame, Operation, Administration and Maintenance OAM/OMCI frame etc.) that receive on the one hand, to preserve and notification processor subsystem (205) the analysis result of MPCP/GTC frame and OAM/OMCI frame etc., determine whether transmitting common ethernet data frame to Service and Interface (203) by mode of operation simultaneously; On the other hand, PON subsystem (202) is also accepted the instruction of processor subsystem (205), produces various MPCP/GTC frames, OAM/OMCI frame or ethernet data frame is handled, and give light signal processing subsystem (201).Processor (CPU) subsystem (205) reads measurement on the one hand and analyzes the data that obtain from light signal processing subsystem (201) and PON subsystem (202), send it to user interface subsystem (204) after treatment, and the latter then displays it; On the other hand, processor (CPU) subsystem (205) also is the central controller of whole instrument, is controlling the mode of operation and the parameter of PON subsystem (202) and other modules, and carries out the high-level business test.Service and Interface (203) is finished the professional adaption function of PON subsystem (202) and user terminal, and the control of also accepting processor subsystem (205) produces miscellaneous service test stream and measures professional connectedness and quality of service.The major function of user interface subsystem (204) is the test result that the mode of operation of apparatus of the present invention and parameter is configured and shows this device.
Fig. 4 is the schematic appearance of an embodiment of apparatus of the present invention.As shown in the figure, on outward appearance, apparatus of the present invention be characterized as portable equipment, form by display screen, LED light group, key groups, PON interface, business interface (GE mouth, IPTV interface (being generally the FE mouth), telephony interface (being generally the RJ-11POTS interface)), power interface and battery.Wherein the specific descriptions of various piece are as follows:
1) external interface
External interface is 1 PON interface and at least one GE electricity mouthful (also can increase by 1 electric mouthful of black phone RJ-11 that is connected telephone set with a user of FE that is used to be connected the IPTV set-top box).The PON mouth is used for this device is connected to the passive light distribution network of PON.The GE mouth is an electricity mouthful, is responsible for bi-directional is transmitted to outside computer so that further analyze or carry out business and verify.More specifically, for the Ethernet control and the administrative message that are mirrored to exterior PC, apparatus of the present invention can be combined into a stream by the reception order and transmit out for electric mouthful from GE then with the bidirectional protocol/Frame on the PON link by stamping the time tag that receives or produce.IPTV interface and POTS interface are used to carry out actual operational trials.
2) display screen
Display screen is the user interactions interface.Its function is for showing the particular content of the Link State that apparatus of the present invention analysis obtains.
3)LED
Apparatus of the present invention are used 3 LED, are respectively applied for dropout (DW LOS), MPCP/GTC login state (Register), the OAM/OMCI state (OAM) of indicating downlink link.
4) button
Apparatus of the present invention have 8 buttons, as shown in the figure, are respectively " power supply " " reset " " pattern " and operation keys group (four direction key and an acknowledgement key).Wherein " power supply " key is responsible for opening and closing power supply, " resetting " key CPU (warm reset) that is responsible for resetting, and " pattern " key is used to select the mode of operation of apparatus of the present invention, and each mode-definition is as follows:
● mirror image pattern: the luminous power on this measurement device PON link, and information such as the up-downgoing Ethernet on link control and administrative message are mirrored to the GE mouth selectively, export to computer
(PC) utilize special software to be further analyzed;
● the bridge joint analytical model: this device allows user computer terminals such as (PC) with the pattern internet login of two layers of bridge joint and communicate by letter normally when carrying out link parameter measurement, status monitoring and analysis;
● the business diagnosis pattern: this device carries out Point-to-Point Protocol over Ethernet Test (comprising PPPoE dialing, username and password test etc.) and IP layer test (test of Ping bag, FTP download test, web page browsing test, VoIP test, IPTV test etc.) even more high-rise function when carrying out link layer parameter measurement, status monitoring and analysis.
In above-mentioned three kinds of patterns, after selecting to enter AD HOC, also need to list function items under this pattern on the display screen for further selection.AD HOC may comprise all or part of function of listing below:
● received optical power;
● receive the error rate;
● link layer parameter such as the lock in time of OLT;
● the value of LLID that this device obtains or Port ID;
● receive frame error rate;
● MPCP or GTC protocol status;
● MPCP or GTC frame statistics;
● OAM or OMCI Link State;
● OAM or OMCI frame statistics;
● DBA analyzes dispatching cycle;
● the real-time bandwidth allocation table of this device;
● the ONU quene state is analyzed;
● encrypted state
● service attribute (Port Management, VLAN, qos policy, multicast, auto-negotiation etc.)
● the traffic frame statistics comprises unicast packet, multicast packets and broadcast packet;
● Point-to-Point Protocol over Ethernet Test
● PING wraps test
● FTP test (checking user's achievable rate)
● the web page browsing test
● voice (VoIP) operational trials
● the IPTV operational trials
5) power supply
Apparatus of the present invention use DC power supply (internal battery, and external rectifier is provided) power supply.
Fig. 5 has introduced the internal structure of embodiment of apparatus of the present invention.As shown in the figure, the critical component of this device is PON acp chip and CPU, SDRAM, the FLASH and the BOOTROM that also have the CPU needs in addition, LCD module and the Keyboard Control module required with user interactions, the optical branching device of receiving light path signal, photo-detector and ONU sidelight module and corresponding Serdes, Ethernet PHY, VoIP that the business interface I/O needs and IPTV business module etc., the buffer memory of preservation link data frame, and clock module and power module.
The PON acp chip is the core devices that apparatus of the present invention realize PON link analysis function.It is responsible for code stream and frame that two optical modules receive are analyzed, and is achieved as follows function specifically:
1) calculate down to the reception error rate;
2) calculate the wrong frame per second of descending reception;
3) parameter lock in time of extraction OLT from the MPCP message of catching;
4) show the value of OLT for the LLID of this device distribution;
5) go out the current state of MPCP/GTC state machine according to MPCP protocol frame or the interaction analysis of GTC frame;
6) the MPCP/GTC frame on the link is added up;
7) analyze the current state of OAM link according to OAM PDU/OMCI frame;
8) the OAM/OMCI frame is added up;
9) calculate DBA dispatching cycle;
10) calculate the upstream bandwidth that this device obtains;
11) the upstream queue state of demonstration ONU this locality;
12) traffic frame is added up, comprised clean culture, multicast and broadcasting;
13) mirror image control: the bidirectional frame on the link is stamped the time tag that receives, merge into a stream then, filter on request again, be forwarded to business interface (GE mouth) at last;
14) encrypted state detects;
15) service attribute (Port Management, VLAN, qos policy, multicast, auto-negotiation etc.) is analyzed
16) transmit common Ethernet data message;
17) need to revise self MAC (EPON) address or sequence number SN (GPON) during this device simulation ONU;
CPU is the control core devices of apparatus of the present invention, and it is responsible for obtaining mode of operation information from the keyboard input, reads required Link State parameter then from PON acp chip and photo-detector, and demonstrates content corresponding by LCD.In addition, the also responsible control Service and Interface of CPU carries out operation layer test (Ethernet/IP test, VoIP operational trials, IPTV operational trials etc.).The system of CPU imports (Boot) information and is placed among the Boot Rom, and software version and PON acp chip version leave among the FLASH.In addition, IP layer and even more high-rise functions such as CPU also responsible execution PPPoE dialing and PING bag, FTP download, web page browsing are to support higher level failure diagnosis.In addition, CPU also supports file management, in memory, and can make the user can check historical test result the test result recorded and stored.
Below only for the present invention is directed to the preferred embodiment of the EPON in the PON technology, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. an EPON link failure diagnosis device is characterized in that, comprising:
The light signal processing subsystem.This subsystem sends to the PON subsystem after on the one hand the signal of telecommunication is measured and be translated into to the optical parameter (as luminous power) of the downlink optical signal that receives from the PON link, and the measurement result of optical parameter then sends to processor subsystem; The up code stream of also being responsible on the other hand the PON subsystem is sent (signal of telecommunication) is converted to the light signal that meets the PON system requirements and sends to the PON optical link.And
The PON subsystem.This subsystem responsible is carried out function and the ONU state and the link detecting function of PON ONU simulator.The PON subsystem is the ONU MAC layer function of a standard of emulation under the control of processor subsystem on the one hand, also the Link State (comprising MPCP/GTC state, OAM/OMCI state and Ethernet service) of this ONU emulation module is monitored, handled and analyzes on the other hand, and then be used for the link failure diagnosis.
Processor subsystem.This subsystem responsible is configured the mode of operation and the parameter of apparatus of the present invention (mainly being meant its light signal processing subsystem and bag processing subsystem), the test of execution upper-layer protocol, and obtain external command from the correlation function subsystem, and the monitoring result of receiving link status and parameter, after further handling then the result is outputed to user interface subsystem; And
User interface subsystem.This subsystem responsible is finished mutual between apparatus of the present invention and the user; And Service and Interface.This subsystem mainly is and user terminal interface functions such as PC, telephone set, set-top box, be responsible for finishing the professional adaption function of user terminal and PON subsystem, mainly comprise Ethernet/IP operation adaption function, VoIP business simulating function, IPTV copying etc.
Clock Subsystem.This subsystem responsible provides clock signal for other subsystems in apparatus of the present invention; And power subsystem.This subsystem responsible provides specific direct voltage for other subsystems in apparatus of the present invention.
2. EPON link failure diagnosis device is characterized in that:
At Ethernet passive optical network (EPON), gigabit passive optical network (GPON) or other PON networks, multiple realizations such as EPON link failure diagnosis device, GPON link failure diagnosis device and other PON link failure diagnosis devices can be arranged respectively.
3. according to claim 1 and 2 described hand-hold passive optical network link failure diagnosis devices, its feature is that also workflow is as follows:
The light signal processing subsystem sends to the PON subsystem after on the one hand the light signal that receives from the PON link being carried out the light path parameter measurement and is converted into the signal of telecommunication, and the measurement result of light path parameter sends to processor subsystem.On the other hand, the code stream (signal of telecommunication) also the PON subsystem sent of light signal processing subsystem is converted to light signal and sends to the PON optical link.
The PON subsystem is handled and is analyzed the various ethernet frames and the protocol data message (comprising mac layer (MPCP/GTC) protocol frame, Operation, Administration and Maintenance OAM/OMCI frame etc.) that receive on the one hand, to preserve and notification processor subsystem (205) the analysis result of MPCP/GTC frame and OAM/OMCI frame etc., determine whether transmitting common ethernet data frame to Service and Interface by mode of operation simultaneously; On the other hand, the PON subsystem is also accepted the instruction of processor subsystem, produces various MPCP/GTC frames, OAM/OMCI frame or ethernet data frame is handled, and give the light signal processing subsystem.
Processor (CPU) subsystem reads measurement on the one hand and analyzes the data that obtain from light signal processing subsystem and PON subsystem, send it to user interface subsystem after treatment, and the latter then displays it; On the other hand, cpu subsystem also is the central controller of whole instrument, is controlling the mode of operation and the parameter of PON subsystem and other modules, and carries out the high-level business test.
Service and Interface is finished the professional adaption function of PON subsystem and user terminal, and the control of also accepting cpu subsystem produces miscellaneous service test stream and measures professional connectedness and quality of service.The major function of user interface subsystem is the test result that the mode of operation of apparatus of the present invention and parameter is configured and shows this device.
4. according to claim 1,2 and 3 described hand-hold passive optical network link failure diagnosis devices, its feature is that also described light signal processing subsystem comprises:
PON ONU sidelight module and luminous power detection module.Optical Power Monitor Module is carried out descending luminous power detection and by the CPU peripheral bus testing result is sent to processor (CPU) subsystem.ONU sidelight module is carried out the optical module identical functions with common ONU, and the light signal that is about to receive is converted to the signal of telecommunication and gives PON subsystem, and the code stream of the electricity that the PON subsystem is sent here is converted to light signal and sends to the PON optical interface simultaneously.The annexation of its inner various piece is as follows: ONU sidelight module links to each other with the PON subsystem by bus.Also link to each other between photo-detector module and processor (CPU) subsystem, handle so that give cpu subsystem with the result of optical power monitoring by the CPU peripheral bus.
5. according to claim 1,2 and 3 described hand-hold passive optical network link failure diagnosis devices, its feature is that also described PON subsystem comprises:
PON Core Feature chip, cache module, PON oral-lateral physical layer block (as Serdes) and business interface physical layer block (as PHY) etc.The annexation of its inner each module is as follows: PON oral-lateral physical layer block links to each other with the PON acp chip by bus; Buffer memory is the SDRAM memory, links to each other with the PON acp chip by bus; Business interface side physical layer block links to each other with the PON acp chip by gmii interface.MAC Address of PON subsystem (EPON) or sequence number SN (GPON) can be provided with and revise.
6. according to claim 1,2 and 3 described monitoring device for handheld passive optical network link, its feature is that also described processor subsystem comprises:
Four modules such as CPU, BOOT ROM, MEMORY and FLASH.Wherein CPU is used for the work of operating software with control apparatus of the present invention, and BOOT ROM is used to deposit the start-up routine of CPU, the memory that MEMORY uses for CPU software, and FLASH then is used for preserving the software version of apparatus of the present invention.The annexation of its inner each module is as follows: central processing unit (CPU) is the control core, and it links to each other with FLASH with BOOTROM, SDRAM respectively with control bus by address bus, data/address bus.
7. according to claim 1,2 and 3 described monitoring device for handheld passive optical network link, its feature is that also described user interface subsystem comprises:
Display control module, Keyboard Control module, three modules of LED light.Display control module is made up of LCD display and display control chip.The Keyboard Control module is made up of keyboard and keyboard control chip.One group of LED of LED light forms, and is used to refer to the basic status of PON link layer.The annexation of its inner each module is as follows: the LCD display of display control module inside links to each other with display control chip, the control of controlled chip, and display control chip then links to each other with CPU in the processor subsystem by bus, controlled by CPU.The keyboard of Keyboard Control inside modules links to each other with keyboard control chip, is subjected to the control of keyboard control chip, and keyboard control chip then links to each other with CPU in the processor subsystem by bus, controlled by CPU.LED light links to each other with processor subsystem with the light signal processing subsystem by holding wire.
8. according to claim 1,2 and 3 described monitoring device for handheld passive optical network link, its feature is that also described Service and Interface comprises:
Ethernet/IP operation adaptation module, VoIP business simulating module, IPTV emulation module etc.Service process subsystem provides Gigabit Ethernet or 100 m ethernet (FE) electrical interface, telephony interface (RJ-11), IPTV interface (Ethernet interface of junctor top box).The annexation of its inner each module is as follows:
Ethernet/IP operation adaptation module, VoIP business simulating module, IPTV emulation module link to each other with processor subsystem by bus respectively, accept the control of processor subsystem.Simultaneously, the Gigabit Ethernet of these modules and instrument or 100 m ethernet (FE) electrical interface, telephony interface (RJ-11), IPTV interface link to each other.
9. according to claim 1,2 and 3 described monitoring device for handheld passive optical network link, its feature is that also described Clock Subsystem comprises:
Clock chip and clock distribution network.The annexation of its inner various piece is as follows: clock chip outputs to clock distribution network, through the processing of clock distribution network, exports multiple clock signals of different frequencies again, and then flows to each chip of other subsystems by holding wire.
10. according to claim 1,2 and 3 described monitoring device for handheld passive optical network link, its feature is that also described power subsystem comprises:
Storage battery (rechargeable battery or disposable storage battery), power supply processing module and power distribution network.The annexation of its inner various piece is as follows: power supply processing module links to each other with the DC power supply (AC-DC) of storage battery with the outside, be responsible for storage battery and the outside DC power supply that provides are handled, generating the needed multiple voltage of different chips, voltage distribution network then is responsible for the output of power supply processing module is distributed to each chip in other subsystems by holding wire.
11. Service and Interface according to claim 8 is characterized in that:
The bodily form is less, is portable equipment, and adopts modular construction, can adorn different module (for example VoIP business simulating module and IPTV business simulating module) according to different demand choosings, and processor subsystem is controlled each module execution content measurement separately.
12. PON subsystem according to claim 5 is characterized in that, it is responsible for finishing following function:
A) under the control of processor subsystem, initiate registration, the authentication of ONU simulator, and accept OLT and it is carried out telemanagement (organize content comprises that downlink data encryptions, DBA parameter configuration, essential information report, Port Management, vlan management, multicast management, QoS are managed etc.) according to specific user's SLA attribute; The MAC Address of ONU simulator or sequence number can be provided with.
B) extract the state information of its ONU simulator, give processor subsystem with data after treatment; Mainly comprise following aspect:
The current state of the mac layer of √ ONU (as the MPCP sublayer of EPON system or the GTC sublayer of GPON system) state machine;
√ according to IEEE 802.3-2005 section 5 or ITU-T G.984 or the OAM Protocol Data Unit (EPON) of other standards (as the OAM standard of particular organization expansion) regulation or OMCI message (GPON) form and implication analyze the state of its Operation, Administration and Maintenance function.
C) extract the parameter information of link layer, operation layer and OAM layer that this ONU simulator obtains, send to processor subsystem after handling by analysis; Mainly comprise:
√ calculates the descending reception error rate;
√ extracts the link layer parameter such as (Sync Time) lock in time of OLT from the MPCP message of catching or GTC frame;
√ shows that OLT is the LLID of this device distribution or the value of Port ID;
√ calculates the wrong frame per second of descending reception;
√ adds up the MAC control protocol message on the EPON system link (as the MPCP frame of EPON system or the GTC frame on the GPON system link);
√ adds up the Operations, Administration and Maintenance on the EPON system link (as the OAM of EPON system or the OMCI of GPON system) message;
√ calculates upstream bandwidth that this device obtains and DBA dispatching cycle;
√ shows the upstream queue state of ONU this locality;
√ adds up traffic frame, comprises unicast frame, multicast frame and broadcast frame.
D) data forwarding function comprises:
√ carries out mirror image control to MAC control protocol message (MPCP or GTC) and OAM message (perhaps OMCI message), as: the bidirectional frame on the link is stamped the time tag that receives, merge into a stream then, filter on request again, be forwarded to the output of GE mouth at last;
√ is to the forwarding capability of common data message.Promptly carry out two layers of forwarding, thereby make the user can utilize this device to realize interim online for common data message, whether normal with the operation layer function of verification system.
13. processor subsystem according to claim 6 is characterized in that, it is responsible for finishing following all or part of function:
A) be responsible for from the keyboard input, obtaining mode of operation information, from PON acp chip and photo-detector, read required Link State parameter then, and demonstrate content corresponding by LCD.
B) be responsible for the control Service and Interface and carry out operation layer test (Ethernet/IP test, VoIP operational trials, IPTV operational trials etc.).
C) be responsible for carrying out IP layer and even more high-rise functions such as PPPoE dialing and PING bag, FTP download, web page browsing, to support higher level failure diagnosis.
D) system of CPU (Boot) information that imports is placed among the Boot Rom, and software version and PON acp chip version leave among the FLASH.
E) CPU also supports file management, in memory, and can make the user can check historical test result the test result recorded and stored.
14. Service and Interface according to claim 8 is characterized in that, it is responsible for finishing following part or repertoire:
A) Point-to-Point Protocol over Ethernet Test
B) PING bag test
C) FTP test (checking user's achievable rate)
D) web page browsing test
E) voice (VoIP) operational trials
F) IPTV operational trials
15. according to claim 1 and 2 described hand-hold passive optical network link failure diagnosis devices, its feature is that also this device has three kinds of mode of operations:
A) mirror image pattern: the luminous power on this measurement device PON link, and information such as the up-downgoing Ethernet on link control and administrative message are mirrored to the GE mouth selectively, export to computer (PC) to utilize special software to be further analyzed;
B) bridge joint analytical model: this device allows user computer terminals such as (PC) with the pattern internet login of two layers of bridge joint and communicate by letter normally when carrying out link parameter measurement, status monitoring and analysis;
C) business diagnosis pattern: this device carries out Point-to-Point Protocol over Ethernet Test (comprising PPPoE dialing, username and password test etc.) and IP layer test (test of Ping bag, FTP download test, web page browsing test, VoIP test, IPTV test etc.) even more high-rise function when carrying out link layer parameter measurement, status monitoring and analysis.
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| CN 200710045121 CN101114879B (en) | 2007-08-22 | 2007-08-22 | Link failure diagnosis device of hand-hold passive optical network |
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| CN 200710045121 CN101114879B (en) | 2007-08-22 | 2007-08-22 | Link failure diagnosis device of hand-hold passive optical network |
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| CN110557693A (en) * | 2019-09-26 | 2019-12-10 | 上海欣诺通信技术股份有限公司 | Optical network protocol analyzer |
| CN113365167A (en) * | 2021-07-06 | 2021-09-07 | 博为科技有限公司 | Dynamic adaptation method for LAN (local area network) side equipment of passive optical network system and related equipment |
| CN113660034A (en) * | 2021-08-17 | 2021-11-16 | 上海欣诺通信技术股份有限公司 | Analysis method and device of handheld PON (passive optical network) simulation system |
| CN114979840A (en) * | 2022-04-13 | 2022-08-30 | 北京直真科技股份有限公司 | Automatic hanging measurement system based on PDA |
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