CN102546010B - Detection method and detection system based on passive optical network (PON) system - Google Patents
Detection method and detection system based on passive optical network (PON) system Download PDFInfo
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- CN102546010B CN102546010B CN201210019102.9A CN201210019102A CN102546010B CN 102546010 B CN102546010 B CN 102546010B CN 201210019102 A CN201210019102 A CN 201210019102A CN 102546010 B CN102546010 B CN 102546010B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
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Abstract
The invention provides a detection method and a detection system based on a passive optical network (PON) system. The detection method includes: an optical line terminal (OLT) media access controller(MAC)chip is provided with an optical network unit (ONU) used for detecting as a virtual ONU outside a normal working ONU, the virtual ONU is distributed with bandwidth except for the bandwidth corresponding to that of the normal working ONU, and detection indication signals corresponding to the virtual ONU are generated. The detection indication signals include marks used for indicating detection types. In a time slot corresponding to the bandwidth distributed for the virtual ONU, the detection indication signals are sent to an optical module on the OLT side so as to lead the optical module on the OLT side to execute detection operation corresponding to the marks used for indicating detection types. The detection method and the detection system solve problems that in the prior art, optical time domain reflectometer (OTDR) detection cannot be conducted automatically in real time and normal ONU business is affected during OTDR detection, and therefore ensure not to affect normal ONU business and improve instantaneity and automaticity of detection.
Description
Technical field
The present invention relates to EPON (Passive Optical Networks, referred to as PON) field, concrete and
Speech, is related to a kind of detection method based on PON system and system.
Background technology
Fast development with network technology and the universalness of network application, network communication and shopping at network and network joy
The part having become as in modern's life such as happy, though domestic or external all in the speed-raising carrying out network, particularly connect
The network rate lifting networking, and current the most popular, most promising technology is exactly PON (Passive Optical
Networks, EPON), meanwhile, at home and in the world PON has begun to deploying on a large scale, and
Accepted by most of operator.
After substantial amounts of PON deployed with devices is run, need to carry out daily O＆M and management to these PON equipment, though
So at present some experiences be have accumulated for the O＆M of PON equipment, but, the fault location for fibre circuit is also scarce at present
Few effective means, are all deployed in outdoor because optical fiber is most of it is easy to be subject to the impact of various conditions and occur some different
Chang Xianxiang, for example, optical fiber severe bends, fibercuts, when these abnormal phenomenas occur, only know exactly which bending point
Optical fiber could be repaired after the reason the reason position and bending, the position of breakaway poing and fracture.
Currently for fibre circuit fault the reason and the method that mainly adopts of determination of position be by OTDR
(Optical Time Domain Reflectometer, optical time domain reflectometer) equipment is being diagnosed to be the fault of fibre circuit
Reason and position, in the fault using OTDR equipment detection fiber circuit, can be by wave multiplexer by the detection of OTDR equipment
Optical signal is incorporated in trunk optical fiber to realize fibre circuit is detected；Or trunk optical fiber is connected to OTDR equipment
On, fibre circuit is detected.
However, the method that above-mentioned use OTDR equipment is detected to the fault of fibre circuit exists having a disadvantage that：
1) OTDR equipment costly, operates also inconvenient, improves the above-mentioned fault to fibre circuit and carries out
The cost of the method for detection, increased operation easier；
2) there are multiple ONU (Optical Network Unit, optical network unit) under PON mouth, may only have multiple ONU
In the branch optical fiber of minority ONU break down, however, when being detected to the fault of fibre circuit using OTDR equipment,
Need all to stop the business of all ONU, OTDR equipment is accessed in PON, or the detection optical signal of OTDR equipment is incorporated into
After in trunk optical fiber, it is further continued for the business of all ONU, the fault of fibre circuit is detected, so, stopping all ONU
Business when just influence whether that under PON mouth, normal ONU carries out business；
3) method that above-mentioned use OTDR equipment is detected to the fault of fibre circuit needs knowing optical link appearance
During fault, just the fault of fibre circuit is detected, and lead to detect in real time, automatically to optical link.
Content of the invention
The invention provides a kind of detection method based on PON system and system, so that at least solve can not in correlation technique
Automatically, carry out normal ONU under OTDR detection and the impact PON mouth when carrying out OTDR detection in real time and carry out asking of business
Topic.
According to an aspect of the invention, it is provided a kind of detection method based on PON system, it includes：Optical link is eventually
End media access control OLT MAC chip configure outside the optical network unit ONU of normal work one for detection ONU work
For virtual ONU, it is bandwidth in addition to bandwidth corresponding with the ONU of normal work for the virtual ONU distribution, and generates and virtual ONU
Corresponding detection indication signal, wherein, detection indication signal includes the mark for indicating detection type；Dividing for virtual ONU
In the time slot corresponding to bandwidth joined, detection indication signal is sent to the optical module of OLT side, so that the optical module execution of OLT side
The detection operation corresponding with for indicating the mark of detection type.
Preferably, in the time slot corresponding in the bandwidth distributed for virtual ONU, detection indication signal is sent to OLT side
After optical module, above-mentioned also included based on the detection method of PON system：The optical module of OLT side receives what OLT MAC chip sent
Detection indication signal, wherein, includes luminous power detection mark or light for indicating the mark of detection type in detection indication signal
Time-domain reflectomer OTDR detection mark；The optical module execution detection operation corresponding with for indicating the mark of detection type.
Preferably, optical module execution is included with the step for indicating the corresponding detection operation of the mark of detection type：
The mark for indicating detection type is obtained from detection indication signal；If obtain for indicating being designated of detection type
OTDR detection mark, then optical module execution OTDR detection；If the luminous power that is designated for indicating detection type obtaining detects
Mark, then optical module execution luminous power detection.
Preferably, the step of optical module execution OTDR detection includes：Light detecting signal is injected into trunk optical fiber by optical module
Optical port in carry out OTDR detection, wherein, light detecting signal is the optical signal that wavelength is non-downlink working wavelength.
Preferably, after optical module carries out OTDR detection to ONU, above-mentioned also included based on the detection method of PON system：Light
Module obtains OTDR testing result；Optical module according to OTDR testing result determine fibre circuit situation however, it is determined that result in
There is warning information, then OTDR testing result is reported webmaster by optical module, webmaster determines fibre circuit according to OTDR testing result
In the reason the break down and position broken down.
Preferably, in webmaster, the reason break down in fibre circuit is determined according to OTDR testing result and break down
After position, above-mentioned also included based on the detection method of PON system：Corresponding PON protection is carried out on the position broken down
Switch.
Preferably, optical module receives the detection indication signal that optical line terminal media access control OLT MAC chip sends
Before, above-mentioned also included based on the detection method of PON system：Detection is referred to by OLT MAC chip by least one of in the following manner
Show that signal is sent to optical module：Detection indication signal is sent to optical module every predetermined period by OLT MAC chip, or, OLT
Detection indication signal is sent to optical module after receiving the instruction of manual triggering by MAC chip.
According to a further aspect in the invention, there is provided a kind of detecting system based on PON system, it includes：Optical link is eventually
End media access control OLT MAC chip, wherein, OLT MAC chip includes：Dispensing unit, for the light net in normal work
Outside network unit ONU, configuration one is used for the ONU of detection as virtual ONU, is virtual ONU distribution except the ONU with normal work
Bandwidth outside corresponding bandwidth, and generate detection indication signal corresponding with virtual ONU, wherein, detection indication signal includes
For indicating the mark of detection type；Transmitting element, will detect in the time slot corresponding in the bandwidth distributed for virtual ONU
Indication signal is sent to the optical module of OLT side, so that the optical module execution of OLT side is relative with for indicating the mark of detection type
The detection operation answered.
Preferably, above-mentioned also included based on the detecting system of PON system：The optical module of OLT side, wherein, optical module includes：
Receiving unit, for receiving the detection indication signal of OLT MAC chip transmission, wherein, for instruction inspection in detection indication signal
The mark surveying type includes luminous power detection mark or optical time domain reflectometer OTDR detection mark；Performance element, for execution with
For the corresponding detection operation of the mark indicating detection type.
Preferably, performance element includes：Acquisition module, for obtaining for indicating detection type from detection indication signal
Mark；First performing module, for obtaining for indicating when being designated OTDR detection mark of detection type, execution
OTDR detects；Second performing module, for obtaining for indicating when being designated luminous power detection mark of detection type, holds
Row luminous power detects.
Preferably, the first performing module includes：Injection submodule, for being injected into the light of trunk optical fiber by light detecting signal
Carry out OTDR detection, wherein, light detecting signal is the optical signal that wavelength is non-downlink working wavelength in mouthful.
Preferably, above-mentioned also included based on the detecting system of PON system：Acquiring unit, for obtaining OTDR testing result；
Reporting unit, for determined according to OTDR testing result fibre circuit situation however, it is determined that result in have warning information, then light
OTDR testing result is reported module webmaster so that webmaster determines according to OTDR testing result breaks down in fibre circuit
Reason and the position broken down.
Preferably, above-mentioned also included based on the detecting system of PON system：Switch unit, for examining according to OTDR in webmaster
After survey result determines the reason break down in fibre circuit and the position broken down, the position broken down is carried out
Corresponding PON pretection switch.
In the present invention, OLT MAC chip configure outside the optical network unit ONU of normal work one for detection
Optical network unit ONU is as virtual ONU, and distributes bandwidth corresponding with the optical network unit ONU of normal work not for virtual ONU
Detection indication signal corresponding with virtual ONU is sent in the corresponding time slot of bandwidth distributing for virtual ONU by same bandwidth
The optical module of OLT side, so that optical module carries out and is used for indicating that the mark of detection type is corresponding in detection indication signal
Detection operation, realizing optical module can in real time, automatically to optical link carry out detection behaviour according to the detection indication signal receiving
Make；Meanwhile, configure virtual ONU outside the optical network unit ONU of normal work, be the bandwidth of virtual ONU distribution and normal work
The corresponding bandwidth of optical network unit ONU made is different, sends detection indication signal so that optical module in the time slot of virtual ONU
It is to be detected based on the bandwidth of virtual ONU, when being detected it is ensured that optical network unit ONU to normal work
Business do not produce impact, thus improving the performance of system, contribute to improving Consumer's Experience.
Brief description
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of preferred structure chart of the detecting system based on PON system according to embodiments of the present invention；
Fig. 2 is a kind of preferred structure chart of performance element according to embodiments of the present invention；
Fig. 3 is a kind of preferred structure chart of the first performing module according to embodiments of the present invention；
Fig. 4 is another kind of preferably structure chart of the detecting system based on PON system according to embodiments of the present invention；
Fig. 5 is another preferred structure chart of the detecting system based on PON system according to embodiments of the present invention；
Fig. 6 is a kind of preferred structure chart of optical module according to embodiments of the present invention；
Fig. 7 is a kind of preferred flow chart of the detection method based on PON system according to embodiments of the present invention；
Fig. 8 is another kind of preferably flow chart of the detection method based on PON system according to embodiments of the present invention.
Specific embodiment
To describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that not conflicting
In the case of, the embodiment in the application and the feature in embodiment can be mutually combined.
In each embodiment following, communication can by wirelessly connecting or the combination of wired connection or both to be realized,
The present invention does not limit to this.
Embodiment 1
Fig. 1 is a kind of preferred structure chart of the detecting system based on PON system according to embodiments of the present invention, such as Fig. 1
Shown, OLT MAC chip 102 should be included based on the detecting system of PON system, wherein, OLT MAC chip 102 includes：Configuration is single
Unit 1021, is used for the ONU of detection as virtual ONU for configuration one outside the optical network unit ONU of normal work, for void
Intend bandwidth in addition to bandwidth corresponding with the ONU of normal work for the ONU distribution, and generate detection instruction corresponding with virtual ONU
Signal, wherein, detection indication signal includes the mark for indicating detection type；Transmitting element 1022, with dispensing unit 1021
Communication, for detecting that indication signal is sent to the optical mode of OLT side in the time slot corresponding in bandwidth distribute for virtual ONU
Block, so that the optical module execution of the OLT side detection operation corresponding with for indicating the mark of detection type.
Preferably, the detecting system based on PON system according to embodiments of the present invention can also include：The optical mode of OLT side
Block 104, wherein, optical module 104 includes：Receiving unit 1041, for receiving the detection instruction letter of OLT MAC chip 102 transmission
Number, wherein, in detection indication signal, include luminous power detection mark or optical time domain reflectometer for indicating the mark of detection type
OTDR detection mark；Performance element 1042, is communicated with receiving unit 1041, for execution and for indicating the mark of detection type
Corresponding detection operation.
In above preferred embodiment, OLT MAC chip 102 configures one outside the optical network unit ONU of normal work
The individual optical network unit ONU for detection is as virtual ONU, and the optical network unit ONU for virtual ONU distribution and normal work
Detection corresponding with virtual ONU is referred in the corresponding time slot of bandwidth distributing for virtual ONU by the different bandwidth of corresponding bandwidth
Show that signal is sent to the optical module 104 of OLT side, so that optical module 104 carries out and detects in indication signal for instruction detection
The detection that the mark of type is corresponding operates, and realizing optical module 104 can according to the detection indication signal receiving in real time, automatically
Ground carries out detection operation to optical link；Meanwhile, configure virtual ONU outside the optical network unit ONU of normal work, be virtual
The bandwidth of ONU distribution is different from the corresponding bandwidth of the optical network unit ONU of normal work, sends inspection in the time slot of virtual ONU
Survey indication signal so that optical module 104 is to be detected based on the bandwidth of virtual ONU, when being detected it is ensured that right
The business of the optical network unit ONU of normal work does not produce impact, thus improving the performance of system, contributes to improving user's body
Test.
On the basis of above-described embodiment, transmitting element 1022 is additionally operable to, and receives optical line terminal media in optical module 104
Before the detection indication signal that access control OLT MAC chip 102 sends, instruction letter will be detected by least one of in the following manner
Number it is sent to optical module 104：Detection indication signal is sent to optical module 104 every predetermined period by OLT MAC chip 102, or
Person, detection indication signal is sent to optical module 104 after receiving the instruction of manual triggering by OLT MAC chip 102.At this
In embodiment, OLT MAC chip 102 can be preset the cycle sending detection indication signal, permissible according to different detection demands
Different cycle durations are set, are required with the detection meeting different；It is also possible to the mode manually triggering is triggering
OLT MAC chip 102 sends detection indication signal, for example, when learning that optical link breaks down, can trigger manually at any time
OLT MAC chip 102 sends detection indication signal, with the fault of timely detection light circuit, therefore, it can for different scenes,
Different transmissions are selected to detect the mode of indication signal, thus enhancing the use motility of the present embodiment.
On the basis of above-described embodiment, the invention provides a kind of preferred performance element 1042, as shown in Fig. 2 should
Performance element 1042 includes：Acquisition module 202, for obtaining the mark for indicating detection type from detection indication signal；
First performing module 204, is communicated with acquisition module 202, for examining for the OTDR that is designated indicating detection type in acquisition
When mark is known, execution OTDR detection；Second performing module 206, is communicated with acquisition module 202, for obtaining for indicating
When being designated luminous power detection mark of detection type, execution luminous power detection.In the present embodiment, can be according to detection instruction
The mark of the different detection type that signal includes executes different detections, thus enhancing the practicality of the present invention.
On the basis of the various embodiments described above, the invention provides a kind of preferred first performing module 204, as Fig. 3 institute
Show, this first performing module 204 includes：Injection submodule 302, for being injected into light detecting signal in the optical port of trunk optical fiber
Carry out OTDR detection, wherein, light detecting signal is the optical signal that wavelength is non-downlink working wavelength.In the present embodiment, by light
Detection signal is injected in the optical port of trunk optical fiber, and to realize the detection to optical link, meanwhile, light detecting signal is wavelength is non-
The optical signal of downlink working wavelength.Preferably, non-downlink working wavelength refers to any wavelength in addition to a wavelength, for example,
In GPON system, downlink working wavelength is the operation wavelength in the range of (1480～1500) nm centered on 1490nm,
Up operation wavelength is the operation wavelength in the range of (1290～1330) nm centered on 1310nm, non-downlink working wavelength
As long as it is all permissible to refer to the not operation wavelength in the range of (1480～1500) nm centered on 1490nm, for example,
The operation wavelengths such as 1310nm, 1550nm, 1575nm；In XGPON system, downlink working wavelength be centered on 1577nm
Operation wavelength in the range of (1575～1580) nm, up operation wavelength is in (1260～1280) nm centered on 1270nm
In the range of operation wavelength, as long as non-downlink working wavelength refers to not in (1575～1580nm) the nm scope centered on 1577nm
Interior operation wavelength is all permissible, for example, the operation wavelength such as 1310nm, 1490nm, 1550nm；Certainly, select the operating wave of OTDR
Length also needs to the operation wavelength of the characteristic meeting OTDR.
On the basis of above-mentioned each preferred embodiment, the present invention is improved based on the detecting system of PON system to above-mentioned,
As shown in figure 4, should be included based on the detecting system of PON system：Acquiring unit 1043, for obtaining OTDR testing result；Report
Unit 1044, is communicated with acquiring unit 1043, for determined according to OTDR testing result fibre circuit situation however, it is determined that knot
There is warning information in fruit, OTDR testing result is reported webmaster so that webmaster determines fibre circuit according to OTDR testing result
In the reason the break down and position broken down.In the present embodiment, there is warning information determining OTDR testing result
When, OTDR testing result is reported webmaster, to determine the reason break down in fibre circuit and the position broken down,
Provide readability, the situation of accurate fibre circuit, thus improve the detection accuracy of the present invention.
On the basis of above-mentioned each preferred embodiment, the present invention has done one to above-mentioned based on the detecting system of PON system
The improvement of step, as shown in figure 5, should be included based on the detecting system of PON system：Switch unit 1045, for webmaster according to
After OTDR testing result determines the reason break down in fibre circuit and the position broken down, in the position broken down
On carry out corresponding PON pretection switch.In the present embodiment, determined according to OTDR testing result and break down in fibre circuit
After reason and the position broken down, corresponding PON pretection switch is carried out on the position broken down, it is to avoid lose according to signal
Lose phenomenon and carry out corresponding PON pretection switch, such that it is able to PON guarantor simply, intuitively, is effectively carried out according to OTDR testing result
Protective switching.
On the basis of above-described embodiment, the invention provides a kind of preferred optical module 104, as shown in fig. 6, this optical mode
Block 104 includes：
1st, except regular traffic transmission-receiving function module also includes OTDR processing module in optical module 104, this OTDR processes mould
Block (being equivalent to performance element 1022) can complete OTDR detection function；Optical module 104 and PON MAC (Media Access
Control, media access control) interface between chip 104 also includes：
1) I2C (Inter-Integrated Circuit) (being equivalent to acquiring unit 106) interface, for ONU luminous power,
OTDR event (being equivalent to OTDR testing result) and the acquisition interface of OLT PON optical module 104 characteristic；
2) Trigger signal (be equivalent to detection indication signal), for trigger optical module 104 go to obtain ONU luminous power or
Start OTDR measurement, Trigger signal is exported under the control of DBA module by PON MAC chip, and Trigger signal is continued to use currently
The Trigger signal that RSSI (Received Signal Strength Indication, the signal intensity instruction of reception) measures
Definition, configures the tool detecting functions of Trigger signal by I2C；
3) the up operation wavelength of PON (for example, 1310nm) and downstream wavelength (for example, 1490nm) data path difference connect
Mouthful；
2nd, upstream wavelength (for example, GPON is 1310nm, and 10G GPON is 1277nm etc.) or other non-down going wave are used
Long conduct test optical signal；Preferably, non-downlink working wavelength refers to any wavelength in addition to a wavelength, for example,
In GPON system, downlink working wavelength is the operation wavelength in the range of (1480～1500) nm centered on 1490nm, on
Row operation wavelength is the operation wavelength in the range of (1290～1330) nm centered on 1310nm, and non-downlink working wavelength refers to
Be as long as that the operation wavelength in the range of (1480～1500) nm centered on 1490nm is not all permissible, for example, 1310nm,
The operation wavelengths such as 1550nm, 1575nm；In XGPON system, downlink working wavelength be centered on 1577nm (1575～
1580) operation wavelength in the range of nm, up operation wavelength be centered on 1270nm in the range of (1260～1280) nm
Operation wavelength, as long as non-downlink working wavelength refers to the not work in the range of (1575～1580nm) nm centered on 1577nm
Make wavelength all permissible, for example, the operation wavelength such as 1310nm, 1490nm, 1550nm；Certainly, the operation wavelength of OTDR is selected also to need
The operation wavelength of the characteristic of OTDR to be met.
3rd, OTDR module receives optical device and shares a receptor with the upward signal of normal PON, with reduces cost；
4th, OTDR test is controlled by Trigger signal, and test result feeds back to system by I2C interface；
Wherein, λ T tests the wavelength of optical signal for OTDR, and λ U is data uplink operation wavelength, and λ D is data downstream operating wave
Long；λ T can be equal to λ U it is also possible to be not equal to λ U it is preferred that λ T is equal to λ U, but, λ T must be not equal to λ D.
In above preferred embodiment, detection indication signal, optical mode are sent to optical module 104 by OLT MAC chip 102
Execution after block 104 receives detection indication signal is operated with the corresponding detection that identifies for indicating detection type, realizes making
With optical module 104, optical link is carried out with detection operation, it is to avoid using external device, optical link is carried out with detection operation, thus avoiding
Under the impact PON mouth when being detected on optical link using external device, normal ONU carries out business；Meanwhile, OLT MAC core
Piece 102 can send detection indication signal every predetermined period, it is to avoid optical link is entered when finding that optical link breaks down again
Row fault detect, such that it is able to detect in real time, automatically to optical link, solves in correlation technique using OTDR equipment
Under impact PON mouth fibre circuit being detected and being led to normal ONU carry out business and can not in real time, automatically right
Optical link carries out detecting to obtain problem, enters thus can ensure that when detecting on optical link and not affecting normal ONU under PON mouth
Industry is engaged in, and, improves the real-time of detection, automaticity meanwhile.
Embodiment 2
On the basis of Fig. 1-6, the invention provides a kind of detection method being preferably based on PON system, as Fig. 7 institute
Show, should be included based on the detection method of PON system：
S702：Optical line terminal media access control OLT MAC chip is joined outside the optical network unit ONU of normal work
Put one for detection ONU as virtual ONU, be virtual ONU distribution in addition to bandwidth corresponding with the ONU of normal work
Bandwidth, and generate detection indication signal corresponding with virtual ONU, wherein, detection indication signal is included for indicating detection type
Mark；
S704：In time slot corresponding in the bandwidth distributed for virtual ONU, detection indication signal is sent to the light of OLT side
Module, so that the optical module execution of the OLT side detection operation corresponding with for indicating the mark of detection type.
In above preferred embodiment, OLT MAC chip configures a use outside the optical network unit ONU of normal work
As virtual ONU and corresponding with the optical network unit ONU of normal work for virtual ONU distribution in the optical network unit ONU of detection
The different bandwidth of bandwidth, by detection instruction letter corresponding with virtual ONU in the corresponding time slot of bandwidth distributing for virtual ONU
Number be sent to the optical module of OLT side so that optical module carry out with detection indication signal in for indicating the mark of detection type
Corresponding detection operation, realizes optical module and can be entered in real time, automatically to optical link according to the detection indication signal receiving
Row detection operation；Meanwhile, configure virtual ONU outside the optical network unit ONU of normal work, be the bandwidth of virtual ONU distribution
Different from the corresponding bandwidth of the optical network unit ONU of normal work, send detection indication signal in the time slot of virtual ONU, make
Obtaining optical module is to be detected based on the bandwidth of virtual ONU, when being detected, it is possible to achieve the optical-fiber network to normal work
The business of unit ONU does not produce impact, thus improving the performance of system, contributes to improving Consumer's Experience.
On the basis of above-described embodiment, by detection instruction letter in the time slot corresponding in the bandwidth distributed for virtual ONU
After number being sent to the optical module of OLT side, above-mentioned also included based on the detection method of PON system：The optical module of OLT side receives
The detection indication signal that OLT MAC chip sends, wherein, includes light for indicating the mark of detection type in detection indication signal
Power detection mark or optical time domain reflectometer OTDR detection mark；Optical module execution is relative with for indicating the mark of detection type
The detection operation answered.In the present embodiment, after optical module receives the detection indication signal of MAC chip transmission, carry out detection behaviour
Make, it is possible to achieve optical module in real time, is automatically detected, meanwhile, optical module can be according to inspection according to detection indication signal
Survey in indication signal and carry out luminous power detection or OTDR detection for indicating the mark of detection type, thus enhancing this detection side
The practicality of method.
On the basis of above-described embodiment, the present invention is improved based on the detection method of PON system to above-mentioned, specifically
Ground, before optical module receives the detection indication signal that optical line terminal media access control OLT MAC chip sends, OLT
Detection indication signal is sent to optical module by least one of in the following manner by MAC chip：OLT MAC chip is every predetermined period
Detection indication signal is sent to optical module, or, detection is referred to after receiving the instruction of manual triggering by OLT MAC chip
Show that signal is sent to optical module.In the present embodiment, OLT MAC chip can preset the cycle sending detection indication signal, root
Different cycle durations can be set according to different detection demands, required with the detection meeting different；It is also possible to pass through handss
Move the mode triggering to trigger OLT MAC chip transmission detection indication signal, for example, when learning that optical link breaks down, can
Send detection indication signal to trigger OLT MAC chip at any time manually, with the fault of timely detection light circuit, therefore, it can pin
To different scenes, different transmissions are selected to detect the mode of indication signal, thus enhancing the use motility of the present embodiment.
On the basis of above-mentioned each preferred embodiment, the invention provides a kind of execution of preferred optical module with for indicating
The method identifying corresponding detection operation of detection type, specifically, this optical module executes and for indicating detection type
The method of the corresponding detection operation of mark includes：The mark for indicating detection type is obtained from detection indication signal；If
The OTDR detection that is designated for indicating detection type obtaining identifies, then optical module execution OTDR detection；If obtain is used for
Indicate detection type is designated luminous power detection mark, then optical module execution luminous power detection.In the present embodiment, Ke Yigen
The mark of the different detection type including according to detection indication signal executes different detections, thus enhancing the reality of the present invention
The property used.
On the basis of above-mentioned each preferred embodiment, the invention provides a kind of preferred optical module executes OTDR detection
Method, specifically, the method that this optical module executes OTDR detection includes：Light detecting signal is injected into trunk optical fiber by optical module
Carry out OTDR detection, wherein, light detecting signal is the optical signal that wavelength is non-downlink working wavelength in optical port.In the present embodiment
In, light detecting signal is injected in the optical port of trunk optical fiber, to realize the detection to optical link, meanwhile, light detecting signal is
Wavelength is the optical signal of non-downlink working wavelength.Preferably, non-downlink working wavelength refers to any ripple in addition to a wavelength
Long, for example, in GPON system, downlink working wavelength is the work in the range of (1480～1500) nm centered on 1490nm
Make wavelength, up operation wavelength is the operation wavelength in the range of (1290～1330) nm centered on 1310nm, non-descending
As long as it is all permissible that operation wavelength refers to the not operation wavelength in the range of (1480～1500) nm centered on 1490nm, example
As the operation wavelength such as 1310nm, 1550nm, 1575nm；In XGPON system, downlink working wavelength is centered on 1577nm
The operation wavelength in the range of (1575～1580) nm, up operation wavelength be centered on 1270nm (1260～
1280) operation wavelength in the range of nm, if non-downlink working wavelength refer to not centered on 1577nm (1575～
1580nm) operation wavelength in the range of nm is all permissible, for example, the operation wavelength such as 1310nm, 1490nm, 1550nm；Certainly, select
The operation wavelength of OTDR also needs to meet the operation wavelength of the characteristic of OTDR.
On the basis of above-mentioned each preferred embodiment, the present invention is changed based on the detection method of PON system to above-mentioned
Enter, specifically, also should be included based on the detection method of PON system：After optical module carries out OTDR detection to ONU, optical module obtains
Take OTDR testing result；Optical module according to OTDR testing result determine fibre circuit situation however, it is determined that result in have alarm
Information, then optical module OTDR testing result is reported webmaster, webmaster according to OTDR testing result determine in fibre circuit occur
The reason fault and the position broken down.In the present embodiment, in the present embodiment, there is announcement determining OTDR testing result
During alarming information, OTDR testing result is reported webmaster, to determine the reason break down in fibre circuit and to break down
Position, provide readability, the situation of accurate fibre circuit, thus improve the detection accuracy of the present invention.
On the basis of above-mentioned each preferred embodiment, the present invention has done one to above-mentioned based on the detection method of PON system
The improvement of step, specifically, also should be included based on the detection method of PON system：In webmaster, optical fiber is determined according to OTDR testing result
After the reason break down in circuit and the position broken down, corresponding PON protection is carried out on the position broken down
Switch.In the present embodiment, the reason break down in fibre circuit and the position broken down are determined according to OTDR testing result
Postpone, corresponding PON pretection switch is carried out on the position broken down, it is to avoid carry out accordingly according to dropout phenomenon
PON pretection switch, such that it is able to simply, intuitively, effectively carry out PON pretection switch according to OTDR testing result.
On the basis of the various embodiments described above, the invention provides another kind is preferably based on the detection method of PON system,
As shown in figure 8, should be included based on the detection method of PON system：
S802：(Dynamic Bandwidth Assignment, dynamic bandwidth divides DBA in OLT PON-MAC chip
Join) configure a virtual ONU in module, for example, fixing is 0 using ONU ID, and actually used ONU is not distributing ONU for it
ID is 0 numbering, and meets the fixed-bandwidth of OTDR event to this virtual ONU distribution one, hereinafter referred to as Tv, can periodically or
One such bandwidth of the manual assignment of allocation of person, cycle or specified time trigger can produce OTDR event in Tv time slot；
Preferably for the determination of Tv, the size of Tv can be determined in the following way：
1) it is dynamically determined the size of the time slot Tv of distribution according to the situation of whole ODN network, OTDR test optical signal arrives
The time needed for the ONU of maximum distance in ODN network that reaches should be less than Tv/2；And the distance of each ONU is permissible in whole network
To be obtained by range finding, the actual range of maximum, same time after the distance of all of ONU under obtaining PON mouth, can be obtained
Speed and refractive index in a fiber are also known, so can be calculated by formula and reach the farthest time needed for ONU
Tl, now needs to ensure that Tv is more than 2Tl it is assumed that band a width of B bps of distributing to virtual ONU, DBA module according to Tl and is distributed to
Bandwidth B bps of virtual ONU, can be according to following determining cycle T (each second carries out the number of times of OTDR monitoring) and Tv
Formula can determine two above parameter：
Tv>2T1
T<(B×6.43/8)/(2Tl+1)
2) can also be determined using a kind of static mode for Tv, the maximum thing that it is supported for each ODN network
Reason distance and logical reach are, and the physical distance being supported maximum, as farthest ONU distance, calculates Tl,
Then calculating Tv and T, wherein T have to be larger than equal to 1.
S804：When optical module receives triggering (Trigger) signal, OTDR processing module needs basis to configure before
Judge that OTDR event is still monitored in the measurement being by luminous power, that is, optical module supports measurement and the OTDR detection of luminous power, if
It is by OTDR detection, then going to step S806, if being by the measurement of luminous power, going to step S812；
S806：When MAC is for virtual ONU distribution Tv bandwidth, OTDR module obtains OTDR test data in Tv time slot.Tool
Body ground, triggering OTDR event and acquisition luminous power all to be triggered using Trigger signal inside optical module, need in measurement light
When power or triggering OTDR event, CPU first notifies to be currently measurement luminous power or OTDR thing inside optical module by I2C
Part, then arranges MAC chip, and MAC chip gives optical module Trigger signal；If OTDR measurement, then need to notify correlation
Module prepares OTDR and measures it is not necessary to carry out the measurement of luminous power, passes through Trigger signalisation OTDR test wavelength simultaneously and swashs
Light device is opened and is sent detection light signal, will detect that, in optical signal injection PON optical port, wherein, test optical signal can be pulse
Or sequence；
S808：In order to reduce test noise, repeat the process of above-mentioned distribution Tv and OTDR test, wherein, duplicate allocation Tv
Number of times until meeting measuring accuracy required for OTDR test processes module, generally thousand of to hundreds of thousands, optical module control
System and OTDR processing module will be average for the data of test after obtain final test result；
S810：After measurement terminates, the OTDR event when pre-test is read by I2C, gets OTDR test curve number
According to, according to OTDR event analysis fibre circuit situation, if, fibre circuit have warning information then by OTDR reporting events to net
Pipe, meanwhile, webmaster is to various OTDR events and warning information (for example, ONU dropout, the announcement such as OLT PON trunk signal loss
Alarming information) carry out comprehensive analysis, provide the ODN network failure information of user's readability, ODN network failure information can accurately refer to
The reason illustrate ODN network failure and the position broken down, OTDR testing process terminates；
S812：If being by measuring light power, only signal being given optical module control and OTDR functional module is led to
Know that it completes the measurement of luminous power, and do not trigger OTDR measurement long wavelength laser (specific luminous power detection mode with existing
Luminous power detection mode is completely the same, repeats no more here)；
S814：Optical module instruction measuring light power terminates；
S816：Measuring light power result is read by I2C interface, measuring light power flow process terminates.
In the above-described embodiments, method optical link being detected is compared with prior art, it is to avoid using external device,
Reduce the cost that optical link is detected；Meanwhile, reduce operation easier, improve the convenience that optical link is detected
Property；Do not affect the regular traffic in existing network while positioning failure, save O＆M cost, being capable of the event of real-time positioning optical link
Barrier, the position that faster more accurately can more intelligently position the reason optical link breaks down and break down, can send out in time
Now break down with solution optical link, improve the satisfaction of operator and client.
Meanwhile, increase the PON OLT optical module after OTDR function, itself interface and between MAC need not change, and still continue to use and work as
Front industry supports that photosphere OLS parameter (inclusion rssi measurement) detects the optical module optical interface of function it is ensured that the OLT system of existing network deployment
System can support OTDR function by changing optical module and updating software release, and OLT PON card expensive in a large number and OLT its
Its part does not need to change, and reduces network investment.
Further, on the basis of above-described embodiment, OTDR measures except indicating ODN network failure for user
The reason and the position broken down, and then accelerate the maintenance of network failure and positioning is outer, OTDR measurement function can also be led to
Cross and fiber connectivity is carried out detect the various protections to realize PON, using OTDR measurement result as the trigger condition of protection, example
Such as across OLT TYPE B PON protection of, PON and with OLT TYPE B protection it is possible to detect OLT and the with OTDR function
Between one-level shunt (SPILITER), whether trunk optical fiber is normal, if fault is detected, triggers PON pretection switch, by OTDR
Detect for PON protection, than current according to dropout (LOS, Loss of signal) detection carry out PON protection simpler
Single, directly perceived and effective, when OTDR function is used for PON protection, OTDR detection mode of operation needs to be arranged to periodically
Real-time detection pattern.
Obviously, those skilled in the art should be understood that each module of the above-mentioned present invention or each step can be with general
Computing device realizing, they can concentrate on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to they are stored
To be executed by computing device in the storage device, and in some cases, can be with different from shown in order execution herein
The step going out or describing, or they are fabricated to respectively each integrated circuit modules, or by the multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (13)
1. a kind of detection method based on PON system is it is characterised in that include：
Optical line terminal media access control OLT MAC chip configures a use outside the optical network unit ONU of normal work
In the ONU detecting as virtual ONU, it is that described virtual ONU distributes in addition to bandwidth corresponding with the ONU of described normal work
Bandwidth, and generate detection indication signal corresponding with described virtual ONU, wherein, described detection indication signal is included for indicating
The mark of detection type；
In time slot corresponding in the bandwidth distributed for described virtual ONU, described detection indication signal is sent to the light of OLT side
Module, so that the optical module execution of the described OLT side detection operation corresponding with the described mark for indicating detection type.
2. method according to claim 1 it is characterised in that corresponding in the bandwidth distributed for described virtual ONU when
After described detection indication signal being sent to the optical module of OLT side in gap, also include：
The optical module of described OLT side receives the detection indication signal that described OLT MAC chip sends, wherein, described detection instruction
It is used in signal indicating that the mark of detection type includes luminous power detection mark or optical time domain reflectometer OTDR detection mark；
The described optical module execution detection operation corresponding with the described mark for indicating detection type.
3. method according to claim 2 is it is characterised in that described optical module executes with described for indicating detection type
The step of mark corresponding detection operation include：
The described mark for indicating detection type is obtained from described detection indication signal；
If the described OTDR detection that is designated for indicating described detection type obtaining identifies, described optical module executes OTDR
Detection；
If the described luminous power detection that is designated for indicating described detection type obtaining identifies, described optical module executes light
Power detection.
4. method according to claim 3 is it is characterised in that the step that described optical module executes OTDR detection includes：
Described optical module light detecting signal is injected in the optical port of trunk optical fiber and carries out OTDR detection, wherein, described light detection
Signal is the optical signal that wavelength is non-downlink working wavelength.
5. the method according to claim 3 or 4 detects it is characterised in that described optical module carries out OTDR to described ONU
Afterwards, also include：
Described optical module obtains OTDR testing result；
Described optical module according to described OTDR testing result determine fibre circuit situation however, it is determined that result in have alarm letter
Breath, then described OTDR testing result is reported webmaster by described optical module, and described webmaster determines according to described OTDR testing result
The reason break down in described fibre circuit and the position broken down.
6. method according to claim 5 is it is characterised in that determine institute in described webmaster according to described OTDR testing result
After stating the reason break down in fibre circuit and the position broken down, also include：The position broken down is carried out
Corresponding PON pretection switch.
7. method according to claim 1 is it is characterised in that optical module receives optical line terminal media access control OLT
Before the detection indication signal that MAC chip sends, also include：
Described detection indication signal is sent to described optical module by least one of in the following manner by described OLT MAC chip：
Described detection indication signal is sent to described optical module every predetermined period by described OLT MAC chip, or, described
Described detection indication signal is sent to described optical module after receiving the instruction of manual triggering by OLT MAC chip.
8. a kind of detecting system based on PON system is it is characterised in that include：Optical line terminal media access control OLT MAC
Chip, wherein, described OLTMAC chip includes：
Dispensing unit, is used for the ONU of detection as virtual for configuration one outside the optical network unit ONU of normal work
ONU, is bandwidth in addition to bandwidth corresponding with the ONU of described normal work for the described virtual ONU distribution, and generates and described void
Intend ONU corresponding detection indication signal, wherein, described detection indication signal includes the mark for indicating detection type；
Described detection indication signal is sent out by transmitting element in the time slot corresponding in the bandwidth distributed for described virtual ONU
Give the optical module of OLT side, so that the optical module execution of described OLT side is corresponding with the described mark for indicating detection type
Detection operation.
9. system according to claim 8 is it is characterised in that also include：The optical module of described OLT side, wherein, described light
Module includes：
Receiving unit, for receiving the detection indication signal that described OLT MAC chip sends, wherein, described detection indication signal
In include luminous power detection mark or optical time domain reflectometer OTDR detection mark for the mark indicating detection type；
Performance element, for the execution detection operation corresponding with the described mark for indicating detection type.
10. system according to claim 9 is it is characterised in that described performance element includes：
Acquisition module, for obtaining the described mark for indicating detection type from described detection indication signal；
First performing module, for obtain described in for indicate described detection type be designated OTDR detection mark when,
Execution OTDR detection；
Second performing module, for identifying for indicating the luminous power detection that is designated of described detection type described in acquisition
When, execution luminous power detection.
11. systems according to claim 10 are it is characterised in that described first performing module includes：
Injection submodule, carries out OTDR detection for being injected into light detecting signal in the optical port of trunk optical fiber, wherein, described light
Detection signal is the optical signal that wavelength is non-downlink working wavelength.
12. systems according to claim 10 or 11 are it is characterised in that also include：
Acquiring unit, for obtaining OTDR testing result；
Reporting unit, for determined according to described OTDR testing result fibre circuit situation however, it is determined that result in have alarm
Information, then described optical module described OTDR testing result is reported webmaster so that described webmaster according to described OTDR detect knot
Fruit determines the reason break down in described fibre circuit and the position broken down.
13. systems according to claim 12 are it is characterised in that also include：
Switch unit, for determining, in described webmaster, break down in described fibre circuit former according to described OTDR testing result
After cause and the position broken down, corresponding PON pretection switch is carried out on the position broken down.
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| CN201210019102.9A CN102546010B (en) | 2012-01-20 | 2012-01-20 | Detection method and detection system based on passive optical network (PON) system |
| PCT/CN2012/086620 WO2013107232A1 (en) | 2012-01-20 | 2012-12-14 | Detection method and system based on pon system |
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| CN102546010B (en) * | 2012-01-20 | 2017-02-08 | 中兴通讯股份有限公司 | Detection method and detection system based on passive optical network (PON) system |
| CN103067078B (en) * | 2013-01-07 | 2015-07-15 | 青岛海信宽带多媒体技术有限公司 | Optical line terminal optical module and Ethernet passive optical network breakpoint detection system |
| PT2963970T (en) * | 2013-03-28 | 2022-02-03 | Huawei Tech Co Ltd | Method and device for allocating bandwidth, user equipment and base station |
| CN104301037A (en) * | 2013-07-16 | 2015-01-21 | 中兴通讯股份有限公司 | Method and system of implementing automatic alarm of fiber fault of passive optical network |
| CN104685847B (en) * | 2013-08-05 | 2017-11-28 | 华为技术有限公司 | Bandwidth allocation methods, apparatus and system |
| WO2015085468A1 (en) | 2013-12-09 | 2015-06-18 | 华为技术有限公司 | Apparatus and method for detecting optical network uplink signal |
| CN104570867A (en) * | 2014-12-26 | 2015-04-29 | 广东美的厨房电器制造有限公司 | Abnormity diagnosis method, abnormity diagnosis system, server, household electrical appliance and environment sensor |
| CN106549706B (en) * | 2015-09-16 | 2019-04-26 | 青岛海信宽带多媒体技术有限公司 | A kind of electrical port module |
| CN106851439B (en) * | 2015-12-07 | 2020-04-24 | 深圳市中兴微电子技术有限公司 | Access method and device for multiple optical network units |
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