CN103974150B - A kind of light is the same as the method for transmitting signals in axle unit and Opto-electronic system - Google Patents
A kind of light is the same as the method for transmitting signals in axle unit and Opto-electronic system Download PDFInfo
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- CN103974150B CN103974150B CN201310046307.0A CN201310046307A CN103974150B CN 103974150 B CN103974150 B CN 103974150B CN 201310046307 A CN201310046307 A CN 201310046307A CN 103974150 B CN103974150 B CN 103974150B
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Abstract
The invention discloses a kind of light with the method for transmitting signals in axle unit and Opto-electronic system, it include: light multiplexing demultiplexer and multiple light with axle unit OCU subelement, wherein: light multiplexing demultiplexer includes public port and multiple branch ports, public port is connected to Optical Distribution Network ODN, each branch port is connect with an OCU subelement, light multiplexing demultiplexer transmits signal by public port and ODN, and light multiplexing demultiplexer transmits signal with the OCU subelement being connected by branch port；Each OCU subelement in multiple OCU subelements is also connect with a coaxial distribution network C DN, transmits signal with the CDN being connected.The present invention stacks multiple OCU subelements inside OCU or drives multiple coaxial electrical interfaces using single electrical domain processing unit, the CDN number of users that list OCU can be supported in Opto-electronic system is promoted in the case where the frequency spectrum resource of Coaxial distribution network network is limited, reduces lower deployment cost.
Description
Technical field
The present invention relates to passive optical network+coaxial broadband networks Opto-electronic systems more particularly to a kind of same axle unit of light
And the method for transmitting signals in Opto-electronic system.
Background technique
One basic trend of next generation network development is the full service network of IPization.For Cable (cable) operator, such as
Broadcasting and TV propose passive optical network (Passive Optical Network, PON) and coaxial broadband networks (Ethemet over
Cable, EOC) mixed networking Remolding Solution, PON and EOC mixed networking are typically expressed as " PON+EOC ".
As shown in Figure 1, in the networking mode of typical PON+EOC, comprising: PON, EOC and background management system,
In, it include OLT (Optical Line Terminal, optical line terminal), ODN (Optical Distributed in PON
Network, Optical Distribution Network), ONU (Optical Network Unit, optical network unit) and OCU (Optical Coax
Unit, the same axle unit of light) in photosphere part.Electric layer part and CNU (Coaxial Network in EOC comprising OCU
Unit, coaxial network unit).Wherein, OCU can be an integrated equipment as shown in fig. 1, can also be by two equipment groups
At, i.e., comprising OCU photosphere part of devices equipment (Optical network Unit, ONU) and OCU coaxial electrical part device
Part equipment (Coaxial Line Terminal, CLT).OCU is the headend in EOC scheme, and CNU is the end in EOC scheme
End equipment.
In Opto-electronic system, due to using the headend of EPON (Ethernet passive optical network), the band of area of light
Wide ability compares CMTS (Cable Modem Termination System), and the bandwidth ability of headend is significantly promoted, but limited
In coaxial spectral bandwidth resource, as shown in Fig. 2, individually the light side information of OCU is unable to fully utilize in coaxial domain, i.e., due to
The bandwidth limitation of single coaxial interface, the branching ratio of CDN can not increase substantially, and cause the waste in terms of cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of light with the signal transmission in axle unit and Opto-electronic system
Method can be improved the quantity of the CDN of OCU support, reduce lower deployment cost.
In order to solve the above technical problems, the same axle unit of a kind of light of the invention, comprising: light multiplexing demultiplexer and multiple light
With axle unit OCU subelement, in which:
The light multiplexing demultiplexer includes public port and multiple branch ports, and the public port is connected to light distribution
Network ODN, each branch port are connect with an OCU subelement, and the light multiplexing demultiplexer passes through the public port and ODN
Signal is transmitted, the light multiplexing demultiplexer transmits signal with the OCU subelement being connected by the branch port；
Each OCU subelement in the multiple OCU subelement is also connect with a coaxial distribution network C DN, and is connected
The CDN transmission signal connect.
Further, the light multiplexing demultiplexer receives optical signal from the ODN by the public port, and light is believed
Number it is divided into multichannel, optical signal is transmitted to each OCU subelement respectively by the branch port；
The OCU subelement includes photoelectric conversion unit and electrical domain processing unit, and the photoelectric conversion unit passes through described
Branch port receives optical signal from the light multiplexing demultiplexer, converts optical signals to electric signal, is transferred to the electricity being connected
Domain processing unit, the electrical domain processing unit carry out electrical domain processing to the electric signal that receives, will treated electric signal transmission
To the CDN being connected.
Further, the electrical domain processing unit that the OCU subelement includes also receives electric signal from the CDN being connected, into
Treated electric signal transmission is arrived the photoelectric conversion unit being connected by the processing of row electrical domain, and the photoelectric conversion unit will reception
To electric signal be converted to optical signal, the light multiplexing demultiplexer is transferred to by branch port；
The light multiplexing demultiplexer is combined the optical signal received by stub interface, passes through common end oral instructions
It is defeated to arrive ODN.
Further, the same axle unit of a kind of light, comprising: photoelectric conversion unit and electrical domain processing unit, in which:
The photoelectric conversion unit includes optical port and electric port, and the optical port is connected to Optical Distribution Network ODN, described
Electric port is connect with electrical domain processing unit, and the photoelectric conversion unit transmits signal, the photoelectricity by optical port and the ODN
Converting unit transmits signal with the electrical domain processing unit being connected by the electric port；
The electrical domain processing unit includes public port and multiple coaxial electrical interfaces, the public port and photoelectric conversion list
The electric port connection of member, the Coaxial distribution network network CDN connection corresponding with one of each coaxial electrical interface, the electrical domain processing unit
Signal is transmitted with the multiple CDN being connected by coaxial electrical interface.
Further, the photoelectric conversion unit receives optical signal from the ODN by the optical port, and optical signal is turned
It is changed to electric signal, by the electric port to electrical domain processing unit transmission telecommunications number；
The electrical domain processing unit receives electric signal from the photoelectric conversion unit by the public port, to receiving
Electric signal carry out electrical domain processing, by the coaxial electrical interface by treated electric signal transmission to the multiple CDN being connected.
Further, the electrical domain processing unit also passes through the coaxial electrical interface from the multiple CDN reception electricity being connected
Signal carries out electrical domain processing, and treated electric signal by public port is transferred to the photoelectric conversion unit；
The electric signal received by electric port is converted to optical signal by the photoelectric conversion unit, is transmitted by optical port
To ODN.
Further, the method for transmitting signals in a kind of Opto-electronic system, comprising:
Light is connect with axle unit OCU with multiple Coaxial distribution network network CDN, and the OCU believes with each CDN transmission being connected
Number；
The OCU is also connect with Optical Distribution Network ODN, and the OCU also transmits signal with the ODN.
Further, the OCU and ODN transmits signal, transmits signal with each CDN being connected, comprising:
The OCU receives optical signal from the ODN, and optical signal is divided into multichannel, will be converted to telecommunications per optical signal all the way
Number, electrical domain processing is carried out to per electric signal all the way, multi-channel electric signal is transferred to the CDN being connected by treated.
Further, further includes:
The OCU receives electric signal from each CDN for being connected, carries out electrical domain processing respectively, will treated electric signal
It is respectively converted into optical signal, multipath light signal is combined, is transferred to ODN.
Further, the OCU and ODN transmits signal, transmits signal with each CDN being connected, comprising:
The OCU receives optical signal from the ODN, converts optical signals to electric signal, carries out electrical domain processing to electric signal,
The electric signal after transmission process is distinguished to each CDN being connected.
Further, further includes:
The OCU receives electric signal from each CDN being connected, and carries out electrical domain processing, and by treated, electric signal is converted
For optical signal, it is transferred to ODN.
In conclusion the present invention inside OCU by stacking multiple OCU subelements or using single electrical domain processing unit
Multiple coaxial electrical interfaces are driven, to be promoted in Opto-electronic system in the case where the frequency spectrum resource of Coaxial distribution network network is limited
The CDN number of users that single OCU can be supported reduces lower deployment cost, and without changing ODN, CDN and CNU, wherein OCU is single
Member includes photoelectric conversion unit and electrical domain processing unit.
Detailed description of the invention
Fig. 1 is the topology diagram of existing EPoC network；
Fig. 2 is the resource-constrained schematic illustration of existing EPoC network spectrum；
Fig. 3 is the structural schematic diagram that multiple OCU subelements stack inside OCU in the EPoC network architecture；
Fig. 4 is that single electrical domain processing unit drives the structure of multiple coaxial electrical interfaces to show inside OCU in the EPoC network architecture
It is intended to；
Fig. 5 is the system architecture diagram that multiple OCU subelements stack inside OCU equipment；
Fig. 6 is the system architecture diagram that single electrical domain processing unit drives multiple coaxial electrical interfaces inside OCU equipment.
Specific embodiment
Present embodiment is based particularly on EPoC (EPON over Cable, the ether based on coaxial cable in PON+EOC
Net passive optical network) framework Opto-electronic system in, by stacking multiple OCU subelements inside OCU or using single
Electrical domain processing unit drives multiple coaxial electrical interfaces, to realize PON network work synchronous with the CDN network that frequency spectrum resource is limited
Make, the CDN number of users that can be supported single OCU increases.
It is as described in Figure 3 a kind of schematic diagram of OCU structure, the light of present embodiment includes: light multiplexing solution with axle unit OCU
Multiplexer and multiple OCU subelements, in which:
Light multiplexing demultiplexer can be optical power combining splitter or optical wavelength division multiplexing demultiplexer.
Light multiplexing demultiplexer includes public port and multiple branch ports, and public port is connected to ODN, each branch end
Mouth is connect with an OCU subelement, and light multiplexing demultiplexer transmits signal by public port and ODN, and light multiplexing demultiplexer is logical
It crosses branch port and transmits signal with the OCU subelement being connected；
Each OCU subelement is also connect with a CDN, transmits signal with the CDN being connected.
OCU subelement includes photoelectric conversion unit and electrical domain processing unit.Photoelectric conversion unit is for carrying out optical signal
Conversion between electric signal.Electrical domain processing unit primarily directed to from CDN coaxial domain information and photoelectric conversion obtain
Area of light information interact processing.
On the down direction of signal, light multiplexing demultiplexer receives optical signal from ODN by public port, by optical signal
It is divided into multichannel, optical signal is transmitted to each OCU subelement respectively by branch port；
The photoelectric conversion unit that OCU subelement includes receives optical signal from light multiplexing demultiplexer by branch port, will
Optical signal is converted to electric signal, is transferred to the electrical domain processing unit being connected, electrical domain processing unit to the electric signal received into
Row electrical domain processing, by treated electric signal transmission to the CDN being connected.
On the up direction of signal, the electrical domain processing unit that OCU subelement includes also receives telecommunications from the CDN being connected
Number, electrical domain processing is carried out, treated electric signal transmission is arrived into the photoelectric conversion unit being connected, photoelectric conversion unit will reception
To electric signal be converted to optical signal, light multiplexing demultiplexer is transferred to by branch port；
Light multiplexing demultiplexer is combined the optical signal received by stub interface, is transferred to by public port
ODN。
In the structure of the OCU of present embodiment, the photosphere part of devices equipment ONU of OCU mainly includes optical interface, recovery
With demultiplexer and photoelectric conversion unit；The coaxial electrical part of devices equipment CLT of OCU mainly includes electrical domain processing unit and same
Axis electrical interface.
It is illustrated in figure 4 another OCU structural schematic diagram, the light of present embodiment includes: photoelectric conversion with axle unit OCU
Unit and electrical domain processing unit, in which:
Photoelectric conversion unit is used to carry out the conversion between optical signal and electric signal.
Electrical domain processing unit primarily directed to from CDN coaxial domain information and the obtained area of light information of photoelectric conversion into
Row interaction process.
Photoelectric conversion unit includes optical port and electric port, and optical port is connected to ODN, and electric port and electrical domain processing unit connect
Connect, photoelectric conversion unit transmits signal by optical port and ODN, photoelectric conversion unit pass through electric port at the electrical domain being connected
It manages unit and transmits signal；
Electrical domain processing unit includes public port and multiple coaxial electrical interfaces, the electric end of public port and photoelectric conversion unit
Mouthful connection, each coaxial electrical interface CDN connection corresponding with one, electrical domain processing unit pass through coaxial electrical interface be connected
Multiple CDN transmit signal.
On the down direction of signal, photoelectric conversion unit receives optical signal from ODN by optical port, and optical signal is converted
For electric signal, by electric port to electrical domain processing unit transmission telecommunications number；
Electrical domain processing unit receives electric signal from photoelectric conversion unit by public port, carries out to the electric signal received
Electrical domain processing, by coaxial electrical interface by treated electric signal transmission to the multiple CDN being connected.
On the up direction of signal, electrical domain processing unit receives electricity from the multiple CDN being connected by coaxial electrical interface
Signal carries out electrical domain processing, and treated electric signal by public port is transferred to photoelectric conversion unit；
The electric signal received by electric port is converted to optical signal by photoelectric conversion unit, is transferred to by optical port
ODN。
In the structure of the OCU of present embodiment, the photosphere part of devices equipment ONU of OCU mainly includes optical interface and light
Electric converting unit；The coaxial electrical part of devices equipment CLT of OCU mainly includes electrical domain processing unit and coaxial electrical interface.
Embodiment 1:
As shown in figure 5, including multiple OCU subelements in OCU, each OCU subelement is stacked, and each OCU subelement is respectively
Include independent photoelectric conversion unit and corresponding electrical domain processing unit.Each OCU subelement and different CDN connections,
Each OCU subelement respectively makes full use of limited coaxial frequency spectrum resource.
Public port of the optical port of OLT via the light multiplexing demultiplexer in ODN access OCU, light multiplexing demultiplexer
The optical port of branch port OCU subelement different from OCU's be correspondingly connected with, the electric port of OCU subelement and different CDN are corresponding
Connection, CDN are connect with CNU.
Below in the above scenario, it is illustrated in the transmission method of the signal of down direction, comprising:
The optical signal of step 1:OLT output inputs the common end of the light multiplexing demultiplexer in OCU after ODN is transmitted
Mouthful；
The light multiplexing demultiplexer of step 2:OCU carries out branch to optical signal, the corresponding biography per optical signal all the way after branch
The defeated photoelectric conversion unit optical port to different OCU subelements；
Step 3: the photoelectric conversion unit of each OCU subelement converts optical signals to electric signal, and is sent to corresponding
Electrical domain processing unit；
Step 4: area of light information processing is coaxial domain information by electrical domain processing unit, is input to CDN by coaxial electrical interface；
Step 5:CDN transmission telecommunications number reaches CNU.
In the transmission method of the signal of up direction, comprising:
Step 1: CNU issues electric signal, transmits by CDN, and the electrical domain processing unit for reaching the OCU subelement in OCU is same
Axis electrical interface；
Step 2: the processing of coaxial domain information is electric signal corresponding with area of light information by electrical domain processing unit, is then fed into
Corresponding photoelectric conversion unit；
Step 3: the photoelectric conversion unit of each OCU subelement converts electrical signals to optical signal, is input to by optical port
The branch port of light multiplexing demultiplexer；
Step 4: the optical signal that light multiplexing demultiplexer inputs each branch port is combined, and is sent by public port
ODN；
Step 5: optical signal is input to the optical port of OLT by ODN.
Embodiment 2:
As shown in fig. 6, including single photoelectric conversion unit and single electrical domain processing unit, electrical domain processing unit in OCU
The coaxial electrical interface of multichannel and different CDN connections are provided, electrical domain processing unit makes full use of limited by the coaxial electrical interface of multichannel
Coaxial frequency spectrum resource.
The optical port of OLT accesses the optical port of the photoelectric conversion unit in OCU via ODN, and the electricity of photoelectric conversion unit connects
Mouth is connect with electrical domain processing unit, and the coaxial electrical interface of the multichannel of electrical domain processing unit is correspondingly connected with from different CDN, and CDN and CNU connect
It connects.
Below in the above scenario, it is illustrated in the transmission method of the signal of down direction, comprising:
The output optical signal of step a:OLT inputs the light end of the photoelectric conversion unit in OCU device after ODN is transmitted
Mouthful；
The photoelectric conversion unit of step b:OCU converts optical signals to electric signal, inputs electrical domain processing unit by electric port；
Step c: area of light information processing is coaxial by the multiple CDN of multichannel coaxial electrical interface driver by electrical domain processing unit
Domain information；
Electric signal transmission is reached CNU by step d:CDN；
In the transmission method of the signal of up direction, comprising:
Step A:CNU issues electric signal, transmits by CDN, and the multichannel coaxial electrical for reaching the electrical domain processing unit in OCU connects
Mouthful；
Step B: the coaxial domain information processing from multiple CDN is telecommunications corresponding with area of light information by electrical domain processing unit
Number, it is then fed into photoelectric conversion unit electricity port；
Step C: the electric signal received from electric port is converted to optical signal by photoelectric conversion unit, is inputed to by optical port
ODN；
Optical signal is input to the optical port of OLT by step D:ODN.
Present embodiment is multiple coaxial by stacking the either single electrical domain processing unit driving of OCU subelement in OCU
Electric port can be improved the CNU number that single OCU is supported, realize and fill in the case where Coaxial distribution network network frequency spectrum resource is limited
Divide the optical port bandwidth using OCU, in the immovable situation of OCU number, promotes the branch ratio of CDN, and without changing ODN, CDN
And CNU unit.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, so as to be stored in
It is performed by computing device in storage device, perhaps they are fabricated to each integrated circuit modules or will be in them
Multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hard
Part and software combine.
Above this is merely a preferred embodiment of the present invention, and is not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of same axle unit of light, comprising: light multiplexing demultiplexer and multiple light are the same as axle unit OCU subelement, in which:
The light multiplexing demultiplexer includes public port and multiple branch ports, and the public port is connected to Optical Distribution Network
ODN, each branch port are connect with an OCU subelement, and the light multiplexing demultiplexer is transmitted by the public port and ODN
Signal, the light multiplexing demultiplexer transmit signal with the OCU subelement being connected by the branch port；
Each OCU subelement in the multiple OCU subelement also connect with a coaxial distribution network C DN, and is connected
CDN transmits signal.
2. the same axle unit of light as described in claim 1, it is characterised in that:
The light multiplexing demultiplexer receives optical signal from the ODN by the public port, and optical signal is divided into multichannel, leads to
It crosses the branch port and transmits optical signal to each OCU subelement respectively；
The OCU subelement includes photoelectric conversion unit and electrical domain processing unit, and the photoelectric conversion unit passes through the branch
Port receives optical signal from the light multiplexing demultiplexer, converts optical signals to electric signal, is transferred at the electrical domain being connected
Manage unit, the electrical domain processing unit carries out electrical domain processing to the electric signal that receives, will treated electric signal transmission to phase
The CDN of connection.
3. the same axle unit of light as claimed in claim 2, it is characterised in that:
The electrical domain processing unit that the OCU subelement includes also receives electric signal from the CDN being connected, and carries out electrical domain processing, will
For electric signal transmission that treated to the photoelectric conversion unit being connected, the photoelectric conversion unit converts the electric signal received
For optical signal, the light multiplexing demultiplexer is transferred to by branch port；
The light multiplexing demultiplexer is combined the optical signal received by stub interface, is transferred to by public port
ODN。
4. a kind of same axle unit of light, comprising: photoelectric conversion unit and electrical domain processing unit, in which:
The photoelectric conversion unit includes optical port and electric port, and the optical port is connected to Optical Distribution Network ODN, the electricity end
Mouth is connect with electrical domain processing unit, and the photoelectric conversion unit transmits signal, the photoelectric conversion by optical port and the ODN
Unit transmits signal with the electrical domain processing unit being connected by the electric port；
The electrical domain processing unit includes public port and multiple coaxial electrical interfaces, the public port and photoelectric conversion unit
Electric port connection, the Coaxial distribution network network CDN connection corresponding with one of each coaxial electrical interface, the electrical domain processing unit pass through
Coaxial electrical interface transmits signal with the multiple CDN being connected.
5. the same axle unit of light as claimed in claim 4, it is characterised in that:
The photoelectric conversion unit receives optical signal from the ODN by the optical port, converts optical signals to electric signal, leads to
The electric port is crossed to electrical domain processing unit transmission telecommunications number；
The electrical domain processing unit receives electric signal from the photoelectric conversion unit by the public port, to the electricity received
Signal carries out electrical domain processing, by the coaxial electrical interface by treated electric signal transmission to the multiple CDN being connected.
6. the same axle unit of light as claimed in claim 5, it is characterised in that:
The electrical domain processing unit also passes through the coaxial electrical interface and receives electric signal from the multiple CDN being connected, and carries out electrical domain
Treated electric signal by public port is transferred to the photoelectric conversion unit by processing；
The electric signal received by electric port is converted to optical signal by the photoelectric conversion unit, is transferred to by optical port
ODN。
7. the method for transmitting signals in a kind of Opto-electronic system, comprising:
Light is connect with axle unit OCU with multiple Coaxial distribution network network CDN, and the OCU transmits signal with each CDN being connected；
The OCU is also connect with Optical Distribution Network ODN, and the OCU also transmits signal with the ODN；
The OCU and ODN transmits signal, transmits signal with each CDN being connected, comprising:
The OCU receives optical signal from the ODN, and optical signal is divided into multichannel, will be converted to electric signal per optical signal all the way, right
Electrical domain processing is carried out per electric signal all the way, multi-channel electric signal is transferred to the CDN being connected by treated；Alternatively,
The OCU receives optical signal from the ODN, converts optical signals to electric signal, carries out electrical domain processing, Xiang Xiang to electric signal
Electric signal after each CDN difference transmission process of connection.
8. the method for claim 7, which is characterized in that further include:
When by treated multi-channel electric signal is transferred to the CDN being connected when, the OCU receives electricity from each CDN being connected
Signal carries out electrical domain processing respectively, and by treated, electric signal is respectively converted into optical signal, is combined to multipath light signal,
It is transferred to ODN.
9. the method for claim 7, which is characterized in that further include:
When distinguishing the electric signal after transmission process to each CDN being connected, the OCU is received from each CDN being connected
Electric signal carries out electrical domain processing, and by treated, electric signal is converted to optical signal, is transferred to ODN.
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| CN201310046307.0A CN103974150B (en) | 2013-02-05 | 2013-02-05 | A kind of light is the same as the method for transmitting signals in axle unit and Opto-electronic system |
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| CN201310046307.0A CN103974150B (en) | 2013-02-05 | 2013-02-05 | A kind of light is the same as the method for transmitting signals in axle unit and Opto-electronic system |
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| CN103974150A CN103974150A (en) | 2014-08-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101123537A (en) * | 2007-09-25 | 2008-02-13 | 杭州华三通信技术有限公司 | Method, system and management server for configuring coaxial cable carrier Ethernet terminal |
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| US8391308B2 (en) * | 2009-09-23 | 2013-03-05 | Hitachi Communication Technologies, Inc. | Docsis pon |
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| CN101123537A (en) * | 2007-09-25 | 2008-02-13 | 杭州华三通信技术有限公司 | Method, system and management server for configuring coaxial cable carrier Ethernet terminal |
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