CN104218988A - Method and device for detecting optical network unit and passive optical network system - Google Patents
Method and device for detecting optical network unit and passive optical network system Download PDFInfo
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Abstract
The invention discloses a method and a device for detecting an optical network unit (ONU) and a passive optical network system in one embodiment. The method comprises the steps of detecting the identification code of the ONU when an uplink empty window or a blank time slot is opened, and according to the identification code of the ONU, determining the ONU corresponding to the identification code of the ONU as a rogue ONU. The invention also provides the corresponding device and the passive optical network system in the embodiment. Fast and efficient detection and determination of the rogue ONU are realize in the passive optical network system, and the influence on the uplink service is reduced.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of detection method of optical network unit, device and passive optical network.
Background technology
At access PON (passive optical network, EPON) in, OLT (the optical line terminal of a local side, optical line terminal) corresponding more than one ONU (optical network unit, optical network unit) or ONT (optical network terminal, Optical Network Terminal), because ONT can regard a kind of special ONU as, following unified use ONU herein.
In the downstream direction, the downlink information unification of OLT is sent on all ONU by a fixing descending optical wavelength; In the upstream direction, all ONU are according to the rule of the up light path bandwidth of time division multiplexing, and luminous at specific time slot, namely ONU indicates up luminescence according to the allocated bandwidth of OLT, and rogue ONU is exactly the ONU of the allocated bandwidth indication light not in accordance with OLT.
The kind of rogue ONU is a lot, from the time of the luminescence of rogue ONU, can be divided into long hair light stream common people ONU: any time is all at the ONU of luminescence; Non-long hair light stream common people ONU: luminous in the time period that non-OLT indicates, may be luminous in advance, or postpone to turn off;
Whether accept the angle of OLT control from rogue ONU, malice rogue ONU: the rogue ONU not responding the control command of OLT can be divided into; Non-malicious rogue ONU: the rogue ONU of the control command of response OLT;
Whether preconfigured from rogue ONU, pre-configured rogue ONU can be divided into: rogue ONU is added by by webmaster or order line, and normally worked ONU, be legal ONU; The rogue ONU of illegal access: rogue ONU is not managed person's accreditation, is the ONU of new access, is the rogue ONU being in automatic Discovery Status yet.
At present when detecting rogue ONU, whether OLT needs first to carry out up sky window (namely order all ONU not luminous) of opening has rogue ONU to exist to detect; If exist, reinform the power supply that all ONU close self optical module, by opening the optical module power supply of each ONU one by one and uply opening sky window to it, determine which ONU is rogue ONU to detect separately.
Inventor is realizing in process of the present invention, and at least there are the following problems to find prior art:
Above-mentioned detection method need to all ONU one by one up sky window of opening investigate, detection efficiency is lower, and needs the transmission power supply of closing ONU one by one when detecting, and then causes the uplink service of ONU to be affected.
Summary of the invention
The object of the embodiment of the present invention is to provide the detection method of a kind of ONU, device and passive optical network, to improve detection efficiency and the accuracy of rogue ONU, and reduces the impact on uplink service.
Embodiments provide the detection method of a kind of ONU, described method comprises:
On opening in line space window or empty timeslots, the Identity Code of ONU detected, the Identity Code of described ONU is for identifying described ONU; According to the described Identity Code having ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
The embodiment of the present invention additionally provides a kind of data communications method of EPON, and described data communications method comprises:
Obtain the Identity Code of optical network unit ONU, the Identity Code of described ONU is for identifying described ONU;
Send the Identity Code of described ONU in the unauthorized time, make optical line terminal OLT on opening, the Identity Code of described ONU in line space window or empty timeslots, be detected.
The embodiment of the present invention additionally provides a kind of ONU, and described ONU comprises: optical module, and described optical module comprises:
Acquiring unit, for obtaining the Identity Code of ONU;
Transmitting element, sends in the unauthorized time Identity Code of described ONU that described acquiring unit obtains, and makes optical line terminal OLT on opening, the Identity Code of described ONU be detected in line space window or empty timeslots.
The embodiment of the present invention additionally provides a kind of optical line terminal OLT, and described OLT comprises:
Detection module, for opening in line space window or empty timeslots at described OLT, detects the Identity Code whether receiving optical network unit ONU;
Processing module, for when described detection module the Identity Code of described ONU detected time, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
The embodiment of the present invention additionally provides a kind of passive optical network, comprises optical line terminal OLT and at least one optical network unit ONU: wherein, described optical network unit ONU comprises optical module;
Described optical module, for obtaining the Identity Code of ONU, send the Identity Code of described ONU in the unauthorized time, the Identity Code of described ONU, for identifying described ONU, makes optical line terminal OLT on opening, the Identity Code of described ONU be detected in line space window or empty timeslots;
Described OLT, for when in line space window or empty timeslots on opening, receives the Identity Code code of described ONU; According to the Identity Code of described ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
The detection method of a kind of ONU of the embodiment of the present invention, device and system, by line space window on opening or empty timeslots, detect the Identity Code of optical network unit ONU; According to the Identity Code of described ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU, be convenient to detection rapidly and efficiently and determine rogue ONU, decreasing the impact on uplink service simultaneously.
Accompanying drawing explanation
Fig. 1 is the method flow schematic diagram of the detection method of a kind of ONU that the embodiment of the present invention provides;
Fig. 2 is the schematic diagram opening line space window and empty timeslots that the embodiment of the present invention provides;
Fig. 3 is the structural representation of a kind of ONU that the embodiment of the present invention provides;
Fig. 4 is the structural representation of a kind of OLT that the embodiment of the present invention provides;
Fig. 5 is the structural representation of a kind of passive optical network PON that the embodiment of the present invention provides.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in further detail the embodiment of the present invention below in conjunction with the drawings and specific embodiments.
Because ONT can regard a kind of special ONU as, be therefore only described for ONU in the application, those skilled in the art can understand, and the embodiment in the application is applicable to ONU, can be applicable to ONT.
Embodiment one
Present embodiments provide the detection method of a kind of ONU, as shown in Figure 1, described method comprises:
S102, optical line terminal OLT in line space window or empty timeslots, detects the Identity Code of optical network unit ONU on opening.
Wherein, the Identity Code of described optical network unit ONU by the optical module of ONU pre-configured and send; Or the Identity Code of described optical network unit ONU is obtained from the control module of ONU by the optical module of ONU and sends within the unauthorized time.
The Identity Code of described ONU is the particular sequence light path coding of this ONU of mark.The Identity Code of this ONU is system configuration, also can be the product coding of optical module.Be specifically as follows particular sequence light path coding (also can be called the specific code stream sequence of ONU) of this ONU of mark, the particular sequence light path coding of this ONU can be made up of demarcations+special code, the identify label that its special code can be LLID (logical connection mark), ONU ID (mark of ONU), SN (sequence number), MAC encode, the product coding of optical module or OLT distribute to the uniqueness of each ONU any one or multiple combinations etc.Each ONU be connected with same OLT, its identify label is all different, to be used for distinguishing each ONU.
S104, OLT, according to the Identity Code of described ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
Described rogue ONU is the ONU broken down, and namely can be understood as the ONU of the allocated bandwidth indication light not in accordance with OLT.
Concrete introduction is done to the acquisition process of the Identity Code to optical network unit ONU in step S102 below.
ONU in the embodiment of the present invention comprises control module and optical module, and described control module can be MAC module or MAC chip.
After ONU gets the Identity Code of ONU, once fault has appearred in the optical module in ONU, time uncontrolled, send the Identity Code of described ONU.Described like this OLT is on opening in line space window or empty timeslots, the Identity Code of this ONU just can be detected, thus be determined with rogue ONU and exist, and can determine that the ONU corresponding with this ONU identify label is rogue ONU, namely accurately have detected rogue ONU, uplink service normal transmission can not be affected again.Wherein, the process of the Identity Code of optical module acquisition ONU can have two kinds of approach:
One, the optical module of ONU obtains this ONU Identity Code from MAC module (or MAC chip) within the unauthorized time.
Time the optical module of this ONU is by MAC module controls, the Tx_ENABLE enable signal of general this optical module of MAC module controls and data-signal, TX_ENABLE represents that enable optical module is luminous, and data-signal represents the data be dealt in light path, if MAC module sends disable signal to optical module, the control signal TX_ENABLE of this optical module be low level when namely this signal is disable signal (here when the control signal of ONU is disable signal, can regard as time ONU is in this section of disable state is " unauthorized time "), optical module is up still luminous, now MAC module sends the Identity Code of this ONU to optical module, make OLT on opening, the identity code of this ONU in line space window or empty timeslots, can be detected, and then determine that the ONU corresponding with the Identity Code of this ONU is rogue ONU.
Two, the optical module of this ONU is from the Identity Code self obtaining this ONU.
The MAC module of ONU is when the luminescence of control optical module, if MAC module does not have input signal, but this time, optical module was but in luminescence, optical module when there is no extraneous control from main light emission, in this case, optical module from the Identity Code self extracting this ONU, and can send the Identity Code of this ONU, and this Identity Code can be that system is pre-configured on optical module.OLT can detect in line space window or empty timeslots on opening, if this identity code can be detected, can assert that the ONU corresponding with this identify label is rogue ONU.
The relation of specific explanations " authorize time ", " unauthorized time " and " opening line space window " and " empty timeslots " below.
Describedly open line space window, namely OLT carries out upstream bandwidth mandate to any one ONU, and namely in this sky window, OLT requires that all ONU are not luminous.Described empty timeslots is the aperture time between adjacent two uplink authorization bandwidth, the mandate time of the corresponding ONU of each uplink authorization bandwidth.Why selection opens line space window or empty timeslots as the time detecting rogue ONU, if be the Identity Code owing to receiving the ONU that ONU sends within the mandate time of certain ONU, then normal data superposes with the data with Identity Code, and OLT likely can not identify Identity Code wherein; And on opening in line space window or empty timeslots, the ONU of normal work can not send data, only have rogue ONU just likely to send data, what therefore OLT received is exactly data with rogue ONU identity coding, can parse ONU corresponding to this Identity Code easily.
As shown in Figure 2, OLT and 3 ONU (ONU1, ONU2, ONU3) is comprised for PON, wherein, S1 is the mandate time of ONU1, and F1 is the unauthorized time of ONU1, S2 is the mandate time of ONU2, F2 is the unauthorized time of ONU2, and S3 is the mandate time of ONU3, and F3 is the unauthorized time of ONU3, K is out the time of upper line space window, then G is empty timeslots.Also can be understood as, " the unauthorized time " of this ONU be the control module (such as MAC module) of ONU send not enable signal to the optical module of ONU, when making the TX_Enable of ONU optical module be low level.
By explanation above, can learn: the optical module of described ONU when receiving " disable " signal that MAC sends, can receive the Identity Code of the described ONU that MAC sends; Or the optical module of ONU is from self obtaining this pre-configured Identity Code.On OLT opens when line space window or empty timeslots, if there is rogue ONU, then OLT can detect the Identity Code of ONU, can also determine that this ONU corresponding with this Identity Code is rogue ONU further; If the data with ONU identify label do not detected, then determine now there is no rogue ONU.And this testing process does not affect up regular traffic.
The detection method of the ONU of the present embodiment, by line space window on opening or empty timeslots, detects the Identity Code of ONU; According to the Identity Code of described ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU, be convenient to detect fast and accurately and determine rogue ONU, decreasing the impact on uplink service, improve users satisfaction degree.
Embodiment two
Present embodiments provide a kind of optical network unit ONU 10, as shown in Figure 3, described ONU comprises optical module 102, and described optical module 102 comprises:
Acquiring unit 1022, for obtaining the Identity Code of ONU;
Transmitting element 1024, sends the Identity Code of described ONU that described acquiring unit obtains, and makes described OLT on opening, the Identity Code of described ONU can be detected in line space window or empty timeslots.
The mode that wherein said acquiring unit 1022 obtains the Identity Code of ONU has two kinds, and one is the Identity Code from self reading this ONU; It two is the Identity Code obtaining this ONU from the control module of ONU, and for the second situation, described ONU can also comprise control module 104.
Described control module 104, for sending the control signal of disable and the Identity Code of described ONU to optical module.Wherein, shown control module 104 can be MAC chip or the MAC module of ONU.
The acquiring unit 1022 of described optical module 102, also for receiving the described disable control signal and the Identity Code of described ONU that described control module 104 sends.
Concrete acquisition process refers to described by embodiment one, just repeats no more here.
The Identity Code of described ONU is the particular sequence light path coding of this ONU of mark.
The ONU of the present embodiment, the Identity Code of this ONU is obtained by ONU, and send the Identity Code of this ONU, there is rogue ONU if make, then OLT can detect the Identity Code of ONU on opening in line space window or empty timeslots, and according to the described Identity Code having ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU, be convenient to detect fast and accurately and determine rogue ONU, decreasing the impact on uplink service, improve users satisfaction degree.
Embodiment three
A kind of optical line terminal OLT 20 as shown in Figure 4, described OLT20 comprises detection module 202 and processing module 204.
Detection module 202, for opening in line space window or empty timeslots at described OLT, detects the Identity Code whether receiving optical network unit ONU;
Processing module 204, for when described detection module the Identity Code of described ONU detected time, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
The Identity Code of described ONU is the particular sequence light path coding identifying described ONU.
The OLT of the present embodiment, on opening in line space window or empty timeslots, if detect the Identity Code of ONU; Then according to the Identity Code of described ONU, can determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU, be convenient to detect fast and accurately and determine rogue ONU, decreasing the impact on uplink service, improve users satisfaction degree.
Embodiment four
A passive optical network PON as shown in Figure 5, described system comprises optical line terminal OLT 20 and at least one optical network unit ONU 10, and described ONU comprises optical module 102 (can be shown in Figure 3);
Described optical module 102, for obtaining the Identity Code of ONU, and sends the Identity Code of described ONU;
Described OLT20, for when in line space window or empty timeslots on opening, receives the Identity Code code of described ONU; According to the Identity Code of described ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
The Identity Code of described ONU is the particular sequence light path coding identifying described ONU.
Described passive optical network also comprises: optical distribution network ODN30, comprises trunk optical fiber, passive optical splitter and branch optical fiber.For connecting OLT20 and ONU10, wherein connected by trunk optical fiber between OLT20 and passive optical splitter, optical branching device realizes the optical power fluctuation of point-to-multipoint, and is connected to multiple ONU by multiple branch optical fiber.
Wherein said ONU10 can also comprise control module 104 (shown in Figure 3), for sending the control signal of disable and the Identity Code of described ONU to optical module; The acquiring unit 1022 of described optical module 102, also for receiving the described disable control signal and the Identity Code (function of concrete ONU10 refers to embodiment two) of described ONU that described control module 104 sends.
The optical network system of the present embodiment, the Identity Code obtained by ONU also sends to OLT, makes OLT on opening in line space window or empty timeslots, if the Identity Code of ONU detected; Then can define rogue ONU to exist, and further can according to the Identity Code of described ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU, be convenient to detect fast and accurately and determine rogue ONU, decrease the impact on uplink service, improve users satisfaction degree.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (14)
1. a detection method for optical network unit ONU, is characterized in that, described method comprises:
On opening in line space window or empty timeslots, the Identity Code of ONU detected, the Identity Code of described ONU is for identifying described ONU;
According to the described Identity Code having ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
2. the method for claim 1, is characterized in that, the Identity Code of described ONU is pre-configured and to send by the optical module of described ONU; Or the Identity Code of described ONU is obtained from the control module of ONU by the optical module of described ONU and sends within the unauthorized time.
3. the method as described in any one of claim 1-2, is characterized in that, the Identity Code of described ONU is the particular sequence light path coding identifying described ONU.
4. a data communications method for EPON, is characterized in that, described data communications method comprises:
Obtain the Identity Code of optical network unit ONU, the Identity Code of described ONU is for identifying described ONU;
Send the Identity Code of described ONU in the unauthorized time, make optical line terminal OLT on opening, the Identity Code of described ONU in line space window or empty timeslots, be detected.
5. data communications method as claimed in claim 4, is characterized in that, the Identity Code of described ONU is the particular sequence light path coding identifying described ONU.
6. an optical network unit ONU, is characterized in that, described ONU comprises optical module, and described optical module comprises:
Acquiring unit, for obtaining the Identity Code of ONU;
Transmitting element, sends in the unauthorized time Identity Code of described ONU that described acquiring unit obtains, and makes optical line terminal OLT on opening, the Identity Code of described ONU be detected in line space window or empty timeslots.
7. ONU as claimed in claim 6, it is characterized in that, described ONU also comprises:
Control module, for sending the control signal of disable and the Identity Code of described ONU to described optical module;
The acquiring unit of described optical module, also for receiving the described control signal and the Identity Code of described ONU that described control module sends.
8. optical network unit as claimed in claim 6, is characterized in that, described acquiring unit, also for reading the Identity Code of the ONU that self stores.
9. the optical network unit as described in any one of claim 6-8, is characterized in that, the Identity Code of described ONU is the particular sequence light path coding of this ONU of mark.
10. an optical line terminal OLT, is characterized in that, described OLT comprises:
Detection module, for opening in line space window or empty timeslots at described OLT, detect the Identity Code whether receiving optical network unit ONU, the Identity Code of described ONU is for identifying described ONU;
Processing module, for when described detection module the Identity Code of described ONU detected time, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
11. optical line terminals as claimed in claim 10, is characterized in that, the Identity Code of described ONU is the particular sequence light path coding identifying described ONU.
12. 1 kinds of passive optical networks, described system comprises optical line terminal OLT and at least one optical network unit ONU, and it is characterized in that, described ONU comprises optical module;
Described optical module, for obtaining the Identity Code of ONU, send the Identity Code of described ONU in the unauthorized time, the Identity Code of described ONU, for identifying described ONU, makes optical line terminal OLT on opening, the Identity Code of described ONU be detected in line space window or empty timeslots;
Described OLT, for when in line space window or empty timeslots on opening, receives the Identity Code code of described ONU; According to the Identity Code of described ONU, determine that the ONU corresponding with the Identity Code of described ONU is rogue ONU.
13. optical network systems as claimed in claim 12, is characterized in that, the Identity Code of described ONU is the particular sequence light path coding identifying described ONU.
14. optical network systems as claimed in claim 12, it is characterized in that, described ONU also comprises:
Control module, for sending the control signal of disable and the Identity Code of described ONU to described optical module;
Described optical module, also for receiving the described control signal and the Identity Code of described ONU that described control module sends.
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| CN201110077143.9A CN102142897B (en) | 2011-03-29 | 2011-03-29 | Detection method and device of ONU (optical network unit) as well as passive optical network system |
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