CN101317333B - Passive optical network user terminal and electric power control and state reporting method thereof - Google Patents
Passive optical network user terminal and electric power control and state reporting method thereof Download PDFInfo
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- CN101317333B CN101317333B CN200780000390.0A CN200780000390A CN101317333B CN 101317333 B CN101317333 B CN 101317333B CN 200780000390 A CN200780000390 A CN 200780000390A CN 101317333 B CN101317333 B CN 101317333B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/272—Star-type networks or tree-type networks
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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
- H04Q11/0005—Switch and router aspects
- H04Q2011/0037—Operation
- H04Q2011/0049—Crosstalk reduction; Noise; Power budget
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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
Abstract
A passive optical network (PON) user terminal comprising a passive optical network interface unit (21) accessing to a PON system, a service data distribution unit (22) connected to the passive optical network interface unit (21) for distributing service data, a service processing unit (23) for receiving and accordingly processing the service data distributed by the service data distribution unit (22), a power source (24) for supplying power to each of the above units, and a power supply control unit (25) for controlling the activating or deactivating of the energy-saving power supply to the service processing unit (23), the service data distribution unit (22), and the passive optical network interface unit (21). A method for controlling the PON power supply and for reporting the power supply state is further provided by another embodiment of the present disclosure.; Embodiments of the present disclosure allows control of the energy usage of the PON user terminal to save power when a service in the PON user terminal is not used or when the user terminal uses a backup power source to supply power.
Description
Technical field
The present invention relates to EPON (PON, Passive OpticalNetwork) technology, in particular, the present invention relates to the control of a kind of passive optic network user terminal and power supply thereof, state reporting method.
Background of invention
The PON technology is the light access technology in order to support that point-to-multipoint application development gets up, with reference to figure 1, general, the PON system generally includes the optical line terminal (OLT that is positioned at the central office, Optical LineTermination), a series of ustomer premises access equipments that are positioned at user resident, this ustomer premises access equipment is generally network unit/optical network terminal (ONU/ONT, Optical Network Unit/Optical NetworkTermination), and middle by optical fiber at described OLT and ustomer premises access equipment, the Optical Distribution Network (ODN, Optical DistributionNetwork) that passive optical splitters or coupler consist of.ODN all is comprised of passive device, and passive optical splitter and coupler only play the effect of transmitting and limiting light, does not need power supply and information processing, and has unrestricted mean time between failures (MTBF).The passive characteristic of above-mentioned PON need not machine room and power supply etc. so that network lays more flexibly; The characteristic of the sharing fiber of above-mentioned PON can be saved a large amount of fiber resources, so that the Access Network line cost is lower; The structure of the pure smooth medium of above-mentioned PON, transparent fiber broadband network is to the following professional fail safe that has kept technology of expanding.
Carry out transfer of data owing to adopting fiber medium in the EPON, the technology such as the more traditional copper cash of bandwidth capacity, WLAN (wireless local area network) improve a lot, can support multiple business development, such as relying in the future that the business that EPON transmits comprises the digital video services such as data business of networking, speech business, IPTV and video request program, CATV is wired and conventional video business, security protection data, the various links etc. of checking meter of residential customer such as Digital Television.Because the multiple business processing unit is integrated in the passive optic network user terminal equipment, may cause energy resource consumption larger, need to carry out energy-conservation to passive optic network user terminal equipment, in addition, because partial service needs high reliability, passive optic network user terminal equipment may be equipped with backup battery, in case the electric main outage, passive optic network user terminal equipment can only rely on the backup battery power supply, and at this moment the energy-conservation of passive optic network user terminal equipment is even more important.
Summary of the invention
The technical problem that the embodiment of the invention solves provides a kind of passive optic network user terminal and power supply is controlled, state reporting method, when using the back-up source power supply in the time of can a certain business is not used in passive optic network user terminal or in the described passive optic network user terminal, control is carried out energy-conservation to described passive optic network user terminal equipment.
A kind of passive optic network user terminal includes:
The EPON interface unit of access passive optical network;
Link to each other with described EPON interface unit and to carry out the business datum Dispatching Unit of business datum distribution;
Receive the business datum of described business datum Dispatching Unit distribution and carry out the Service Processing Unit of respective handling; With
Power supply to above-mentioned unit power supply;
Also include:
Supply control unit is used for controlling at least one the energy-conservation power supply of opening or closing described Service Processing Unit, business datum Dispatching Unit and EPON interface unit.
A kind of passive optic network user terminal power control method, described passive optic network user terminal includes EPON interface unit, business datum Dispatching Unit and Service Processing Unit, comprising:
Detect the use state of each Service Processing Unit;
According to each Service Processing Unit state-detection result, if it is unused state that the treatment state of Service Processing Unit is arranged, then opens to the energy-conservation power supply of this untapped Service Processing Unit and again detecting when needing to use this Service Processing Unit it is closed energy-conservation power supply.
A kind of power supply status report method of passive optic network user terminal comprises:
Passive optic network user terminal sends passive optic network user terminal unit power supply state changing notice message to optical line terminal.
The embodiment of the invention has following beneficial effect:
At first, the embodiment of the invention is by arranging supply control unit in passive optic network user terminal, when the EPON user does not use in the described subscriber terminal equipment certain professional, can open Service Processing Unit in the passive optic network user terminal by described supply control unit control, the energy-conservation power supply of business datum Dispatching Unit or EPON interface unit, when the business of detecting is reused, then can control by described supply control unit and to close Service Processing Unit in the described passive optic network user terminal, the energy-conservation power supply of business datum Dispatching Unit or EPON interface unit, thus equipment energy consumption can significantly be reduced.
Brief Description Of Drawings
Fig. 1 is that the prior art passive optical network forms schematic diagram;
Fig. 2 is passive optic network user terminal structural representation of the present invention;
Fig. 3 is a kind of preferred embodiment schematic diagram of supply control unit shown in Figure 2;
Fig. 4 is the schematic flow sheet that passive optic network user terminal power supply status of the present invention reports;
Fig. 5 is power supply state changing notice message structure schematic diagram of the present invention;
Fig. 6 is the frame structure of prior art OAM manufacturer expansion.
Implement mode of the present invention
With reference to figure 2, this figure is the chief component schematic diagram of the passive optic network user terminal that provides of the embodiment of the invention.
As shown in Figure 2, the embodiment of the invention provide passive optic network user terminal mainly include:
With the business datum Dispatching Unit 22 that described EPON interface unit 21 links to each other, be mainly used in the business datum that passive optical network transmits is distributed;
Each Service Processing Unit 23 that links to each other with described business datum Dispatching Unit 22, be mainly used in receiving the business datum of described business datum Dispatching Unit 22 distributions and carrying out respective handling, during specific implementation, described Business Processing can be video traffic processing unit, speech business processing unit and data business of networking processing unit, and described each Service Processing Unit 23 externally provides various business by dissimilar interface (such as CATV coaxial cable interface, phone RJ45 interface, Ethernet interface etc.);
Necessary, the passive optic network user terminal that the embodiment of the invention provides also comprises the power supply 24 to above-mentioned unit power supply;
In addition, based on the needs of Energy Saving Control, passive optic network user terminal also comprises described in the embodiment of the invention:
Can find in the actual use procedure that user's most of the time can not use whole business of passive optic network user terminal equipment.In addition, be equipped with the situation of back-up source (for example battery) at passive optic network user terminal, the user can be by abandoning the use of partial service, prolong the time that back-up source supports key business, concrete power supply control by each Service Processing Unit, business datum Dispatching Unit and EPON interface unit in 25 pairs of passive optic network user terminals of described supply control unit among the present invention, carry out energy-conservation power supply, reduce the energy consumption of subscriber terminal equipment.
Need to illustrate, in the embodiment of the invention for the electric power starting of described each Service Processing Unit, business datum Dispatching Unit and EPON interface unit, closure or reduce energy consumption, can be by corresponding outfit power control switch on each unit, realize the power supply of correlation unit is controlled by opening or close corresponding switch, during specific implementation, also can adopt other modes, for example in the unified control of power unit, repeat no more here.
The below specifies the supply control unit 25 that the embodiment of the invention provides.
The control of 25 pairs of passive optic network user terminal unit of supply control unit described in embodiment of the invention power supply comprises various ways, for example each passive optic network user terminal unit enters the judgement detection of power save mode, the operation of passive optic network user terminal equipment under the power save mode, the judgement that passive optic network user terminal equipment withdraws from power save mode detects, withdraw from the operation of passive optic network user terminal equipment behind the power save mode, and passive optic network user terminal equipment and terminal OLT device is mutual etc.
According to the embodiment of a kind of Energy Saving Control of the present invention, can at first detect the use state of each Service Processing Unit; Then according to each Service Processing Unit state-detection result, if it is unused state that the treatment state of Service Processing Unit is arranged, then opens to the energy-conservation power supply of this untapped Service Processing Unit and again detecting when needing to use this Service Processing Unit it is closed energy-conservation power supply.
Specifically with reference to figure 3, this figure is that a kind of optional embodiment of the supply control unit 25 that provides of the embodiment of the invention forms schematic diagram.
As shown, supply control unit 25 comprises in the present embodiment:
Service condition detecting unit 251 uses state for detection of each Service Processing Unit, and during specific implementation, described service condition detecting unit can be by the use state of each each Service Processing Unit of business interface state-detection of monitoring.
The first control unit 252, according to Service Processing Unit state-detection result, if it is unused state that the treatment state of Service Processing Unit is arranged, then opens to the energy-conservation power supply of this untapped Service Processing Unit and again detecting when needing to use this Service Processing Unit it is closed energy-conservation power supply.
Specifically, the Ethernet interface that for example monitors user's online does not have Link (being that netting twine interrupts), or the network interface flow is 0 o'clock, can close the power supply of business of networking processing module, or the hardware chip of setting this module enters energy saver mode, so just can save the part energy resource consumption.
For example monitoring subscriber phone does not again have off-hook, at this moment can close voice service processing module with energy-conservation.Conventional video professional (CATV cable TV) can be processed equally.
In addition, the embodiment of the invention also can realize energy conservation object greatly, namely at first detects the use state of each Service Processing Unit; Then according to Service Processing Unit state-detection result, if all Service Processing Unit is unused state, then the energy-conservation power supply to all Service Processing Units, EPON interface unit and business datum Dispatching Unit is opened in control, and is again detecting the energy-conservation power supply of closing when Service Processing Unit need to use this Service Processing Unit that need use, EPON interface unit and business datum Dispatching Unit.
Specifically also please refer to Fig. 3, also can comprise according to supply control unit described in one embodiment of the present of invention 25:
The second control unit 253, according to Service Processing Unit state-detection result, if all Service Processing Unit is unused state, then can control the energy-conservation power supply of opening all Service Processing Units, EPON interface unit and business datum Dispatching Unit among the present invention, and again detect the energy-conservation power supply of closing when Service Processing Unit need to use this Service Processing Unit that need use, EPON interface unit and business datum Dispatching Unit.
During specific implementation, all do not use when detecting all business, all Service Processing Units use all that (user does not have off-hook, simultaneously data service Ethernet interface is 0 without Link or flow, simultaneously the CATV interface does not use etc.) time, the PON subscriber terminal equipment can enter the power save mode of deeper degree, namely close all Service Processing Units, and close the up EPON interface unit of passive optic network user terminal equipment (such as photoelectric conversion module, EPONMAC, GPON protocol process module etc.), only be retained in whether each Service Processing Unit of detection recovers to use under the power save mode, the also no longer contact of this moment passive optic network user terminal equipment and local side apparatus is in off-line state.When detecting each Service Processing Unit recovery use, immediately each unit is recovered from power save mode, reopen up EPON interface unit, connect (specifically with local side apparatus, under the EPON networking, can be according to passive optical network protocol again logging in online), and open each Service Processing Unit and provide professional to the user.
When subscriber terminal equipment configuration back-up source (for example battery) power supply, can increase the detection to power supply, back-up source, when detecting AC interruptions, the power supply of startup backup battery, certain Energy Saving Strategy of selectively actuatable, for example only guarantee high-priority service function (professional such as call voice), business, the business to not providing such as other online, CATV no longer are provided, its corresponding service processing unit is also closed or is reduced the power supply electric energy, to save energy resource consumption, make backup battery can support the use of longer time.
Equally with reference to figure 3, in a kind of specific implementation, the embodiment of the invention provide described in supply control unit 25 also include:
Power state detection unit 254 is for detection of power supply status;
The 3rd control unit 255, according to the power state detection result, if when AC interruptions, the power supply of startup back-up source, select to open the energy-conservation power supply to part or all of Service Processing Unit, during specific implementation, 255 controls of described the 3rd control unit can also be used service conditions according to the user equally, if it is unused state that the treatment state of Service Processing Unit is arranged, then opens to the energy-conservation power supply of this untapped Service Processing Unit and again detecting when needing to use this Service Processing Unit it is closed energy-conservation power supply.
In addition, actual Energy Saving Strategy also can be more flexible,, for example detect and just enter power save mode when the backup battery electric weight is lower than certain early warning value.Or before entering power save mode, point out the power supply situation by panel to the user, and determine whether enter power save mode by the user, also please refer to Fig. 3, in a kind of specific implementation, the described supply control unit that the embodiment of the invention provides also can include:
The 4th control unit 256 according to the power state detection result, if when the back-up source electric weight is reduced to predetermined value, selects to open the energy-conservation power supply to part or all of Service Processing Unit.
Be used (such as phone off-hook, network interface Link or have flow, CATV port to connect activate etc.) in case detect each business interface, namely there is Service Processing Unit to use, the PON user terminal withdraws from power save mode at once, recover the normal power supply of corresponding service processing unit, if business datum Dispatching Unit and up PON interface unit also are in power save mode, then recover simultaneously the normal function of business datum Dispatching Unit and up PON interface unit.
For ease of monitor the operating state of each PON subscriber terminal equipment from local side, carry out fault detection and diagnosis.The PON user terminal can also report power supply status to local side OLT among the present invention.
With reference to figure 4, this figure is the schematic flow sheet of the PON user terminal power supply status report method that provides of the embodiment of the invention.
The PON subscriber terminal equipment is entering and is withdrawing from power save mode, can report to local side apparatus a kind of message packet (can be described as power supply state changing notice message) of specific format when detecting the interruption of terminal equipment Alternating Current Power Supply, local side apparatus OLT can record these events with the daily record mode, simultaneously can be to attendant's alarm, remind prevention and process user fault, concrete, as shown, the action (for example making each Service Processing Unit enter power save mode etc.) that implement to change the correlation unit power supply status at passive optic network user terminal equipment self before, send power supply state changing notice message to OLT, behind the notified message of OLT, the corresponding push-notification-answer message of optional response, also can not respond any message to passive optic network user terminal, just the variation of simple record passive optic network user terminal power save mode.
Concrete, with reference to figure 5, passive optic network user terminal power supply state changing notice message comprises two parameter fields, first field is the action identification of power supply state changing, comprise the action that enters or withdraw from power save mode, the second field is the passive optic network user terminal sign that relates to, such as data online, voice, CATV etc.
After OLT receives passive optic network user terminal power supply state changing notice message, response to response message of passive optic network user terminal, comprise in this response message and accepting or the indication of refusal passive optic network user terminal unit power supply state changing and the passive optic network user terminal unit marks of accepting or refuse power supply state changing.
After passive optic network user terminal is received the response message of OLT, according to the indication result that response message carries, determine whether to implement corresponding power supply state changing action.
Optional scheme, passive optic network user terminal do not need to wait for the indication of OLT response message after sending power supply state changing notice message, enter immediately relevant power supply status.OLT does not respond any message to passive optic network user terminal after receiving passive optic network user terminal power supply state changing notice message, just the variation of simple record passive optic network user terminal power save mode.
Above-mentioned passive optic network user terminal can be realized at heterogeneous networks level (such as MPCP, MAC or RS protocol layer etc.) to the notice message that OLT sends, to adapt to the requirement of different PON standard agreements.
For example, in Ethernet passive optical network (EPON, EthernetPON) consensus standard, can utilize operation management maintain (OAM, Operation AdministrationMaintenance) protocol extension to realize.In the IEEE802.3ah protocol specification, utilize the expansion Organization Specific InformationTLV of manufacturer (with reference to IEEE Draft P802.3ah/D3.3 57.5.2.3 joint) of OAM, behind the self-defined Organizationally UniqueIdentifier (being the OUI field), at the form of the self-defined control message of Organization SpecificValue field, so just can realize at the EPONOAM protocol layer carrying of the control message of above-mentioned notice or response.
Specifically with reference to figure 6, the frame structure of OAM manufacturer expansion has been described in the IEEE802.3ah agreement, three bytes of populated OUI field (identification of the manufacturer), the data content of back just can self-defining, such as defines by Fig. 5 form and to get final product.
At gigabit passive optical network (GPON, GigabitPON) in the consensus standard, can utilize Physical Layer OAM (PLOAM, Physical LayerOperation Administration Maintenance) or OMCI expand to realize, according to the ITU-TG.984.3 protocol extension, increase the MessageIdentifier type, be used for transmitting self-defined message shown in Figure 5.
In sum, at first, the embodiment of the invention is by arranging supply control unit in passive optic network user terminal, when the EPON user does not use in the described subscriber terminal equipment certain professional, can open Service Processing Unit in the passive optic network user terminal by described supply control unit control, the energy-conservation power supply of business datum Dispatching Unit or EPON interface unit, when the business of detecting is reused, then can control by described supply control unit and to close Service Processing Unit in the described passive optic network user terminal, the energy-conservation power supply of business datum Dispatching Unit or EPON interface unit, thus equipment energy consumption can significantly be reduced.
Secondly, the embodiment of the invention is in the situation that passive optic network user terminal equipment configuration back-up source, the user can be by abandoning the use of partial service, namely by described supply control unit control partial service processing unit, business datum Dispatching Unit or EPON interface unit are carried out energy-conservation power supply, thereby realize prolonging the time that backup battery supports key business.
Again, passive optic network user terminal can also send passive optic network user terminal unit power supply state changing notice message to optical line terminal in the embodiment of the invention, its power supply status of notice optical line terminal, optical line terminal is according to described notice message, can be to passive optic network user terminal loopback passive optic network user terminal unit power supply state changing response message, be that local side operator also can strengthen by the message packet of specific format the maintenance management ability to subscriber terminal equipment, find in advance subscriber terminal equipment potential faults (such as equipment AC interruptions etc.), improve maintenance efficiency and service quality.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (8)
1. passive optic network user terminal includes:
The EPON interface unit of access passive optical network;
Link to each other with described EPON interface unit and to carry out the business datum Dispatching Unit of business datum distribution;
Receive the business datum of described business datum Dispatching Unit distribution and carry out the Service Processing Unit of respective handling; With
Power supply to above-mentioned unit power supply;
It is characterized in that, also include:
Supply control unit is used for controlling at least one the energy-conservation power supply of opening or closing described Service Processing Unit, business datum Dispatching Unit and EPON interface unit;
Wherein, described power supply comprises AC power and back-up source, and described supply control unit includes:
The power state detection unit is for detection of power supply status;
The 3rd control unit is according to the testing result of power state detection unit, if AC interruptions, when starting the back-up source power supply, select to open the energy-conservation power supply to part or all of Service Processing Unit.
2. passive optic network user terminal according to claim 1 is characterized in that, described supply control unit also includes:
The 4th control unit according to the testing result of power state detection unit, if when the back-up source electric weight is reduced to predetermined value, selects to open the energy-conservation power supply to part or all of Service Processing Unit.
3. passive optic network user terminal according to claim 1 is characterized in that, described Service Processing Unit comprises: video traffic processing unit, speech business processing unit and data business of networking processing unit.
4. passive optic network user terminal according to claim 1 is characterized in that, described energy-conservation power supply is for cutting off or reduction power supply electric energy.
5. the power control method of a passive optic network user terminal, the power supply that described passive optic network user terminal includes EPON interface unit, business datum Dispatching Unit, Service Processing Unit and above-mentioned unit is powered, it is characterized in that, comprising:
Detect the use state of each Service Processing Unit;
According to each Service Processing Unit state-detection result, if it is unused state that the treatment state of Service Processing Unit is arranged, then opens to the energy-conservation power supply of this untapped Service Processing Unit and again detecting when needing to use this Service Processing Unit it is closed energy-conservation power supply;
Wherein, described power supply comprises AC power and back-up source, and described power control method further comprises:
Detect power supply status;
According to the testing result of power supply status, if AC interruptions, when starting the back-up source power supply, select to open the energy-conservation power supply to part or all of Service Processing Unit.
6. passive optic network user terminal power control method according to claim 5 is characterized in that, also comprises:
According to Service Processing Unit state-detection result, if all Service Processing Unit is unused state, then the energy-conservation power supply to all Service Processing Units, EPON interface unit and business datum Dispatching Unit is opened in control, and is again detecting the energy-conservation power supply of closing when Service Processing Unit need to use this Service Processing Unit that need use, EPON interface unit and business datum Dispatching Unit.
7. the power supply status report method such as each described passive optic network user terminal of claim 1 to 4 is characterized in that, comprising:
Passive optic network user terminal sends passive optic network user terminal unit power supply state changing notice message to optical line terminal;
Described method also comprises:
After optical line terminal receives described passive optic network user terminal unit power supply state changing notice message, to passive optic network user terminal loopback passive optic network user terminal unit power supply state changing response message, described passive optic network user terminal unit power supply state changing response message comprises the passive optic network user terminal unit marks of accepting or refusing passive optic network user terminal unit power supply state changing and accept or refuse power supply state changing;
Perhaps,
Optical line terminal is not receiveed the response to passive optic network user terminal after receiving described passive optic network user terminal unit power supply state changing notice message, the variation of record passive optic network user terminal power save mode.
8. the power supply status report method of passive optic network user terminal according to claim 7, it is characterized in that, described passive optic network user terminal unit power supply state changing notice message comprises: the passive optic network user terminal unit marks that enters or withdraw from energy-conservation power supply state operation information and enter or withdraw from energy-conservation power supply state operation.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100822745A CN100438505C (en) | 2005-12-20 | 2006-05-17 | Passive optic network user terminal and its power control and state reporting method |
| PCT/CN2007/070024 WO2007131457A1 (en) | 2006-05-17 | 2007-05-17 | Passive optical network user terminal and method of power supply control and power supply state reporting for the same |
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| CN101317333A CN101317333A (en) | 2008-12-03 |
| CN101317333B true CN101317333B (en) | 2013-02-27 |
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| CN200780000390.0A Active CN101317333B (en) | 2006-05-17 | 2007-05-17 | Passive optical network user terminal and electric power control and state reporting method thereof |
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| WO (1) | WO2007131457A1 (en) |
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| CN102651664B (en) * | 2011-02-28 | 2016-05-11 | 上海宽岱电讯科技发展有限公司 | A kind of reverse method of supplying power to and device for passive optical network equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003209920A (en) * | 2002-01-16 | 2003-07-25 | Japan Aviation Electronics Industry Ltd | Dvi light extension cable connection, and external power supply input confirming device |
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| US5539564A (en) * | 1993-09-22 | 1996-07-23 | Nippon Telegraph And Telephone Corporation | Point-to-multipoint optical transmission system |
| DE19831942A1 (en) * | 1998-07-16 | 2000-01-20 | Alcatel Sa | Receiver of a telecommunication network |
| US7454012B2 (en) * | 2002-04-29 | 2008-11-18 | Adc Dsl Systems, Inc. | Managing power in a line powered network element |
| CN100438505C (en) * | 2005-12-20 | 2008-11-26 | 华为技术有限公司 | Passive optic network user terminal and its power control and state reporting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003209920A (en) * | 2002-01-16 | 2003-07-25 | Japan Aviation Electronics Industry Ltd | Dvi light extension cable connection, and external power supply input confirming device |
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| WO2007131457A1 (en) | 2007-11-22 |
| CN101317333A (en) | 2008-12-03 |
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