CN205847287U - Local side R-T units based on OCDMA two dimension electric light encoding and decoding - Google Patents
Local side R-T units based on OCDMA two dimension electric light encoding and decoding Download PDFInfo
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- CN205847287U CN205847287U CN201620778823.1U CN201620778823U CN205847287U CN 205847287 U CN205847287 U CN 205847287U CN 201620778823 U CN201620778823 U CN 201620778823U CN 205847287 U CN205847287 U CN 205847287U
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Abstract
This utility model discloses a kind of local side R-T unit based on OCDMA two dimension electric light encoding and decoding, and this device is mainly made up of electricity time domain time delay coding/decoding module, light frequency domain coding/decoding module, photo-coupler, system management module and power management module.Electricity time domain time delay coding module connects light frequency domain coding/decoding module, n user data signal of telecommunication core net issued carries out the time delay coding of time domain according to unique light address code that each user distributes simultaneously, signal after time domain coding couples, and then the signal of telecommunication after n user's coupling is sent into light frequency domain coding/decoding module and carries out Frequency Domain Coding according to light address code simultaneously；Light frequency domain coding/decoding module is converted into optical signal to the signal of telecommunication sent here from electricity time domain time delay coding module and carries out optical frequency domain coding, and is issued by photo-coupler or the direct optical distribution network that is sent into by the optical signal after two dimension t λ coding.This utility model has the advantages that simple possible, reconstitution good, Large Copacity and speed are high.
Description
Technical field
This utility model relates to technical field of optical fiber communication, is specifically related to a kind of based on OCDMA two dimension electric light encoding and decoding
Local side R-T unit.
Background technology
Local side R-T unit based on OCDMA is a kind of to apply the local side apparatus in Optical Access Network central office side, is light
The interface equipment that fine access network is connected with upper core net.Local side light R-T unit completes the coding of the downlink data of core net also
It is distributed to optical distribution network and the upstream data from optical distribution network is decoded and is sent to core net.
Existing OCDMA local side transmitting-receiving encoding and decoding technique mainly has:
1. the full light of t-λ based on Fiber Bragg Grating FBG (FGB) or array waveguide grating (AWG) and fiber delay line two dimension
Encoding and decoding, it is sent into FGB after subscriber signal wide spectrum light source and intensity modulator are modulated into optical signal, enters according to light address code
Line frequency spectrum cutting coding, then optical signal to different wave length carries out different delayed time and completes time domain coding respectively, finally sends into and closes road
Device couples.This kind of scheme can realize full light high speed encoding and decoding, and user capacity is big, is the most potential technology in the long run,
But it realizes the optical device that Multichannel photoswitch to be used, ASE light source, light intensity modulator, photo threshold device etc. are expensive, equipment cost
The highest, with regard to the state of the art and yield, also it is not enough to attract operator's infusion of financial resources development；
2., based on high-speed chip tradition CDMA, in electrical domain, user transmitted data and carry out ambipolar time domain code word and directly expand
Frequently, and the transmission data of multiple users are coupled by the way of code division multiplexing, are finally modulated on optical signal and pass through
Optical fiber is transmitted.This kind of scheme cost is the cheapest and technology maturation, but ECDMA scheme is that the signal of telecommunication is carried out the straight of time domain
Connecing extension, electrical domain codec has to operate on chipping rate, and the processing speed of electrical domain limits chipping rate.If
Raising number of users increases code length, then can limit the transfer rate of data；
3. the multistage amplitude coding and decoding scheme of frequency domain based on electrical domain space encoding, it is first according to the address code of different user
In electrical domain, signal to different user carries out frequency spectrum cutting and carries out AND operation, then by each user at all ripples respectively
The value of lengthy motion picture is added, and i.e. completes Frequency Domain Coding, then signal is sent into light intensity modulator modulation, finally coupled by optical signal
Output.This kind of scheme is a kind of electrical domain encoding and decoding technique, overcomes " electronic bottleneck ", configures odd jobs, and reconfigurability is strong.But the party
Case belongs to one-dimensional frequency domain encoding and decoding, and user capacity and systematic function are the most poor.
Above various reasons causes OCDMA to also fail at present apply in practice, the most mostly uses in access network
OTDM and OWDM technology, it would be highly desirable to a kind of OCDMA local side R-T unit meeting Large Copacity, two-forty and low cost.
Utility model content
To be solved in the utility model be existing OCDMA local side transmitting-receiving decoding method have that cost is high, speed is low and
The problem that capacity is little, it is provided that a kind of local side R-T units based on OCDMA two dimension electric light encoding and decoding.
For solving the problems referred to above, this utility model is realized by below scheme:
Local side R-T units based on OCDMA two dimension electric light encoding and decoding, including electricity time domain time delay coding/decoding module, light frequency domain
Coding/decoding module, system management module and power management module；Power management module respectively with electricity time domain time delay coding/decoding module
It is connected with the feeder ear of light frequency domain coding/decoding module；System management module respectively with electricity time domain time delay coding/decoding module and light frequency domain
The control end of coding/decoding module is connected；Electricity time domain time delay coding/decoding module includes electricity time domain time delay coding unit and electricity time domain time delay
Decoding unit；Light frequency domain coding/decoding module includes optical frequency domain coding unit and optical frequency decoding unit；Core net is prolonged with electricity time domain
Time coding unit input connect, the input of outfan and the optical frequency domain coding unit of electricity time domain time delay coding unit is even
Connecing, the outfan of optical frequency domain coding unit is connected with distribution net；Distribution net is connected with the input of optical frequency decoding unit, optical frequency
The outfan of territory decoding unit is connected with the input of electricity time domain time delay decoding unit, the outfan of electricity time domain time delay decoding unit
Connect core net.
Said apparatus still further comprises optical circulator, and the Single port of this optical circulator connects distribution net, optical circulator
Another port connects the outfan of optical frequency domain coding unit, and the another port of optical circulator connects the input of optical frequency decoding unit
End.
In such scheme, electricity time domain time delay coding unit includes electricity time delay encoder and final election bonder, wherein electricity time delay
The input of encoder forms the input of electricity time domain time delay coding unit, and the outfan of electricity time delay encoder connects final election coupling
The input of device, the outfan of final election bonder forms the outfan of electricity time domain time delay coding unit；Electricity time domain time delay decoding is single
Unit includes distributor, electricity time delay decoder and data decision device；The input of distributor forms electricity time domain time delay decoding unit
Input, the outfan of distributor connects the input of electricity time delay decoder, and the outfan of electricity time delay decoder connects data and sentences
The certainly input of device, the outfan of the outfan electricity time domain time delay decoding unit of data decision device.
In such scheme, optical frequency domain coding unit includes multiple multistage amplitude electrical to optical converter and wavelength division multiplexer；Multiple
The input of multistage amplitude electrical to optical converter concurrently forms the input of optical frequency domain coding unit, multiple multistage amplitude electro-optic conversion
The outfan of device is connected with the input of wavelength division multiplexer simultaneously, and the outfan of wavelength division multiplexer forms optical frequency domain coding unit
Outfan；Optical frequency decoding unit includes multiple multistage amplitude optical-electrical converter and Wave decomposing multiplexer；Wave decomposing multiplexer
Input forms the input of optical frequency decoding unit, and the outfan of Wave decomposing multiplexer connects multiple multistage amplitude photoelectricity respectively
The input of transducer, the outfan of multiple multistage amplitude optical-electrical converters concurrently forms the outfan of optical frequency decoding unit.
Compared with prior art, this utility model has a characteristic that
1, in time domain, carry out electricity time domain time delay encoding and decoding, it is to avoid Multichannel photoswitch, ASE light source, light intensity modulator,
The extremely expensive optical devices such as photo threshold device, reduce cost and equipment complexity；
2, after time domain enterprising line delay encoding and decoding, the encoding and decoding of frequency domain have been carried out, for two dimension OCDMA, the most one-dimensional electrical domain
Encoding and decoding substantially increase system user capacity；
3, there is simple possible, reconstitution good, technique effect that Large Copacity, speed are high.
Accompanying drawing explanation
Fig. 1 is the principle schematic of local side R-T unit based on OCDMA two dimension electric light encoding and decoding.
Fig. 2 is the refinement structural representation of local side R-T unit based on OCDMA two dimension electric light encoding and decoding.
Detailed description of the invention
For apparent expression thought of the present utility model, in conjunction with shown in Fig. 1 to Fig. 2, provide this utility model one relatively
This utility model is further described by good embodiment (including but not limited to that this is embodied as structure).
Local side R-T units based on OCDMA two dimension electric light encoding and decoding, as illustrated in fig. 1 and 2, compile including electricity time domain time delay and solve
Code module, light frequency domain coding/decoding module, optical circulator, system management module and power management module.Power management module is respectively
It is connected with the feeder ear of electricity time domain time delay coding/decoding module and light frequency domain coding/decoding module.System management module respectively with electricity time domain
Time delay coding/decoding module is connected with the control end of light frequency domain coding/decoding module.Electricity time domain time delay coding/decoding module includes that electricity time domain is prolonged
Time coding unit and electricity time domain time delay decoding unit.Light frequency domain coding/decoding module includes optical frequency domain coding unit and optical frequency decoding
Unit.The outfan of core net is connected with the input of electricity time domain time delay coding unit, the output of electricity time domain time delay coding unit
End is connected with the input of optical frequency domain coding unit, and the outfan of optical frequency domain coding unit is connected with one end of optical circulator.Light
The other end of circulator connects distribution net.The another end of optical circulator connects the input of optical frequency decoding unit, light Frequency Domain Solution
The outfan of code unit is connected with the input of electricity time domain time delay decoding unit, and the outfan of electricity time domain time delay decoding unit connects
The input of core net.
System management module is connected with electricity time domain time delay coding/decoding module and light frequency domain coding/decoding module and controls its work,
Light two-dimensional address codes, the subscriber signal time delay controlling electricity time domain time delay coding/decoding module and coupling is distributed including for every user
The frequency spectrum wave plate closing, controlling light frequency domain coding/decoding module selects.Additionally, system management module is also responsible for detecting home environment ginseng
Number, management optical network unit at remote side are also carried out light address code coupling for it, are uploaded to by telecommunication administration interface by local parameter
NMS the management and control of response to network management system.System administration control module is by central processing unit, bin, network
Communication interface, local communication control the dedicated computer hardware system composition such as interface, display interface.Wherein, central processing unit can
Selecting the S3C6410 chip of Samsung, bin can be selected for Nand Flash chip, and network service chip can be selected for DM9000
Network card chip, central processing unit is connected communication by serial ports with electricity time domain time delay coding/decoding module, light frequency domain coding/decoding module.System
Reason module under the overall leadership runs Linux embedded OS, and installation and operation has corresponding embedded management and control software, and software kit contains
The time delay of electricity time domain time delay coding unit and Coupling Control Unit, and be responsible for and NMS communication, with other hardware coordination
Realize above-mentioned functions.
Electricity time domain time delay coding unit includes electricity time delay encoder and n ω × N final election bonder, wherein electricity time delay encoder
Input formed electricity time domain time delay coding unit input, electricity time delay encoder outfan connect final election bonder defeated
Entering end, the outfan of final election bonder forms the outfan of electricity time domain time delay coding unit.Optical frequency domain coding unit includes N number of many
Rank amplitude electrical to optical converter and wavelength division multiplexer.The input of multiple multistage amplitude electricals to optical converter concurrently forms optical frequency domain coding
The input of unit, the outfan of multiple multistage amplitude electricals to optical converter is connected with the input of wavelength division multiplexer simultaneously, wavelength-division
The outfan of multiplexer forms the outfan of optical frequency domain coding unit.Electricity time domain time delay coding unit connects optical frequency domain coding list
Unit, unique light address code that n user data signal of telecommunication core net issued distributes according to each user carries out time domain simultaneously
Time delay coding, the signal after time domain coding couples, then by the signal of telecommunication feeding optical frequency domain coding after n user coupling
Unit carries out Frequency Domain Coding according to light address code simultaneously.The optical frequency domain coding unit electricity to sending here from electricity time domain time delay coding unit
Signal is converted into optical signal and carries out optical frequency domain coding, and by the optical signal after two dimension t-λ coding by optical circulator or
Person is directly sent into optical distribution network and issues.
Electricity time domain time delay decoding unit includes N × n ω distributor, electricity time delay decoder and data decision device.Distributor
Input forms the input of electricity time domain time delay decoding unit, and the outfan of distributor connects the input of electricity time delay decoder,
The outfan of electricity time delay decoder connects the input of data decision device, and the outfan electricity time domain time delay decoding of data decision device is single
The outfan of unit.Optical frequency decoding unit includes multiple multistage amplitude optical-electrical converter and Wave decomposing multiplexer.Wave Decomposition multiplexing
The input of device forms the input of optical frequency decoding unit, and the outfan of Wave decomposing multiplexer connects multiple multistage amplitude respectively
The input of optical-electrical converter, the outfan of multiple multistage amplitude optical-electrical converters concurrently forms the output of optical frequency decoding unit
End.Decoding process is contrary with cataloged procedure, and the optical signal that optical distribution network is uploaded by optical frequency decoding unit carries out frequency domain and decodes also
Sending into electricity time domain time delay decoding unit after being converted into optical signal and carry out time domain decoding, output will be uploaded to the decoding electricity of core net
Signal.
Electricity time domain time delay coding/decoding module can use analog circuit to realize, it is possible to use polylith is known in the art
Special igh-speed wire-rod production line chip portfolio completes this functional module, as made electricity consumption time delay encoder chip, n ω × N final election coupling
Clutch chip, n ω × N distributor, electricity time delay decoder chip and data decision device chip interconnect, common real electricity time domain letter
Number time delay encoding and decoding.Additionally, light frequency domain coding/decoding module can use the multistage amplitude optical transceiver module of different wave length as multistage
Amplitude electrical to optical converter carries out the encoding and decoding of light frequency domain to the multistage amplitude signal of telecommunication of different adders.Or can use suitable
High-speed A/D converter, drive circuit and BOSA (light emission receiving unit) work in combination joined carry out the encoding and decoding of light frequency domain.
Above-mentioned embodiment can without departing from the change carried out within the scope of this utility model in some enforcement, therefore more than
It is embodied as illustrating should be regarded as exemplary, and is not used to limit the protection domain that this utility model is applied for a patent.
Claims (4)
1. local side R-T units based on OCDMA two dimension electric light encoding and decoding, it is characterised in that: include electricity time domain time delay encoding and decoding mould
Block, light frequency domain coding/decoding module, system management module and power management module；
Power management module is connected with electricity time domain time delay coding/decoding module and the feeder ear of light frequency domain coding/decoding module respectively；System
Manage the module control end respectively with electricity time domain time delay coding/decoding module and light frequency domain coding/decoding module to be connected；
Electricity time domain time delay coding/decoding module includes electricity time domain time delay coding unit and electricity time domain time delay decoding unit；Light frequency domain is compiled and is solved
Code module includes optical frequency domain coding unit and optical frequency decoding unit；
Core net is connected with the input of electricity time domain time delay coding unit, the outfan of electricity time domain time delay coding unit and light frequency domain
The input of coding unit connects, and the outfan of optical frequency domain coding unit is connected with distribution net；
Distribution net is connected with the input of optical frequency decoding unit, the outfan of optical frequency decoding unit and electricity time domain time delay decoding
The input of unit connects, and the outfan of electricity time domain time delay decoding unit connects core net.
Local side R-T units based on OCDMA two dimension electric light encoding and decoding the most according to claim 1, it is characterised in that: also enter
One step includes optical circulator, and the Single port of this optical circulator connects distribution net, and the another port of optical circulator connects light frequency domain and compiles
The outfan of code unit, the another port of optical circulator connects the input of optical frequency decoding unit.
Local side R-T units based on OCDMA two dimension electric light encoding and decoding the most according to claim 1, it is characterised in that:
Electricity time domain time delay coding unit includes electricity time delay encoder and final election bonder, wherein the input shape of electricity time delay encoder
Becoming the input of electricity time domain time delay coding unit, the outfan of electricity time delay encoder connects the input of final election bonder, final election
The outfan of bonder forms the outfan of electricity time domain time delay coding unit；
Electricity time domain time delay decoding unit includes distributor, electricity time delay decoder and data decision device；The input of distributor is formed
The input of electricity time domain time delay decoding unit, the outfan of distributor connects the input of electricity time delay decoder, electricity time delay decoding
The outfan of device connects the input of data decision device, the output of the outfan electricity time domain time delay decoding unit of data decision device
End.
Local side R-T units based on OCDMA two dimension electric light encoding and decoding the most according to claim 1, it is characterised in that:
Optical frequency domain coding unit includes multiple multistage amplitude electrical to optical converter and wavelength division multiplexer；Multiple multistage amplitude electro-optic conversion
The input of device concurrently forms the input of optical frequency domain coding unit, the outfan of multiple multistage amplitude electricals to optical converter simultaneously with
The input of wavelength division multiplexer connects, and the outfan of wavelength division multiplexer forms the outfan of optical frequency domain coding unit；
Optical frequency decoding unit includes multiple multistage amplitude optical-electrical converter and Wave decomposing multiplexer；The input of Wave decomposing multiplexer
End forms the input of optical frequency decoding unit, and the outfan of Wave decomposing multiplexer connects multiple multistage amplitude opto-electronic conversion respectively
The input of device, the outfan of multiple multistage amplitude optical-electrical converters concurrently forms the outfan of optical frequency decoding unit.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059703A (en) * | 2016-07-22 | 2016-10-26 | 广西师范大学 | Local side transceiving device based on OCDMA two-dimensional electro-optical coding and decoding, and coding/decoding method thereof |
| CN106877968A (en) * | 2017-01-20 | 2017-06-20 | 深圳大学 | When a kind of/frequency domain zero correlation block two dimension bipolar code building method and system |
| CN108834001A (en) * | 2018-08-01 | 2018-11-16 | 钦州学院 | A kind of electromagnetic remote metering system and method |
-
2016
- 2016-07-22 CN CN201620778823.1U patent/CN205847287U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059703A (en) * | 2016-07-22 | 2016-10-26 | 广西师范大学 | Local side transceiving device based on OCDMA two-dimensional electro-optical coding and decoding, and coding/decoding method thereof |
| CN106059703B (en) * | 2016-07-22 | 2018-06-29 | 广西师范大学 | Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding |
| CN106877968A (en) * | 2017-01-20 | 2017-06-20 | 深圳大学 | When a kind of/frequency domain zero correlation block two dimension bipolar code building method and system |
| CN108834001A (en) * | 2018-08-01 | 2018-11-16 | 钦州学院 | A kind of electromagnetic remote metering system and method |
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Granted publication date: 20161228 Effective date of abandoning: 20180629 |