CN103379100B - The same axle unit of data transmission method and light of Opto-electronic system - Google Patents
The same axle unit of data transmission method and light of Opto-electronic system Download PDFInfo
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- CN103379100B CN103379100B CN201210118684.6A CN201210118684A CN103379100B CN 103379100 B CN103379100 B CN 103379100B CN 201210118684 A CN201210118684 A CN 201210118684A CN 103379100 B CN103379100 B CN 103379100B
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Abstract
The present invention provides a kind of data transmission method of Opto-electronic system and the same axle unit of light, which includes: light with optical signal of the axle unit OCU reception from optical line terminal OLT, and converts optical signals to electric signal；OCU is filtered electric signal according to the identifier of the coaxial network unit CNU in coaxial network, and filtered electric signal is sent to corresponding coaxial network unit.In the present invention, downlink message is filtered based on the identifier of CNU by OCU equipment, to filter out the data for being not belonging to be connected to the CNU under OCU, and then achievees the effect that optical-fiber network and coaxial network rate adaptation in Opto-electronic system.
Description
Technical field
The present invention relates to the communications fields, same in particular to the data transmission method and light of a kind of Opto-electronic system
Axle unit (Optical Coax Unit, abbreviation OCU).
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, abbreviation PON) and coaxial broadband networks (Ethernet
Over Cable, abbreviation EOC) mixed networking Remolding Solution.PON and EOC mixed networking are typically expressed as " PON+
EOC".The networking schematic diagram of typical PON+EOC as shown in Figure 1, includes PON, EOC and background management system in the networking,
It wherein, include OLT (Optical Line Terminal, optical line terminal), ODN (Optical Distributed in PON
Network, Optical Distribution Network) and OCU (Optical Coax Unit, the same axle unit of light) in photosphere part, wrap in EOC
Electric layer part and CNU (Coaxial Network Unit, coaxial network unit) containing OCU.Wherein, OCU can institute as shown in figure 1
It is shown as an integrated equipment, can also be made of two equipment, i.e. photosphere part of devices equipment (the Optical network of OCU
Unit, abbreviation ONU) and OCU coaxial electrical part of devices equipment (Coaxial Line Terminal, abbreviation CLT).OCU is
For the headend in EOC scheme, and CNU is the terminal device in EOC scheme.
The implementation of another EOC, i.e. EPoC (EPON Over Coax, the coaxial access skill based on EPON MAC
Art and scheme).The networking belongs to a kind of concrete form of PON+EOC networking, and photosphere part includes OLT+ODN+EPoC OCU's
Photosphere module, electric layer part include electric layer module+CDN (Coaxial Distributed Unit)+CNU of EPoC OCU.?
In the framework, the user side of CNU and OCU are the physical layer based on Coax, but MAC can reuse the MAC of EPON.
The characteristics of due to PON+EPOC system architecture, OCU equipment can have the function of photoelectric conversion, the photosphere physics of PON
Bandwidth can support the rate of 10Gbit/s, and the general existing electric layer band width in physical on cable is not more than 5G, and band
Wide bigger, the technical difficulty on cable is bigger, will not reach 10Gbits/s in the general bandwidth demand of the user of cable connection.
Since the downlink data of the network of PON is the mode of broadcast, optical-fiber network may connect ONU and OCU simultaneously, and downlink data may surpass
The bandwidth for the coaxial network that OCU is connected below is crossed, to cause rate not to be adapted to, if data will be caused to lose without processing
It loses, therefore, how to carry out rate adaptation in response to this, just become one and have to solve the problems, such as.
Summary of the invention
It is above-mentioned at least to solve the present invention provides a kind of data transmission method of Opto-electronic system and the same axle unit of light
The problem of optical-fiber network is not adapted to coaxial network rate in Opto-electronic system.
According to an aspect of the invention, there is provided a kind of data transmission method of Opto-electronic system, comprising: light is coaxial
Unit OCU receives the optical signal from optical line terminal OLT, and converts optical signals to electric signal；OCU is according in coaxial network
The identifier of coaxial network unit CNU electric signal is filtered, and filtered electric signal is sent to corresponding coaxial
Network unit.
Preferably, the optical-fiber network in Opto-electronic system is ethernet passive optical network EPON, and identifier is the logic chain of CNU
Line LLID or MAC Address.
Preferably, the optical-fiber network in Opto-electronic system is gigabit passive optical network GPON, and identifier is CNU's
GEMPORT-ID or sequence number.
Preferably, before optical signal of the OCU reception from optical line terminal OLT, further includes: CNU is registered to OLT；OLT is
CNU distributes LLID/GEM PORT-ID；OCU is according to the LLID/GEM PORT-ID information configuration filter table from OLT.
Preferably, OCU is filtered electric signal according to the identifier of the coaxial network unit CNU in coaxial network, packet
Include: OCU is according to configuration information from the data for filtering out the CNU for being not belonging to connect under OCU in electric signal.
According to another aspect of the present invention, a kind of light is provided with axle unit OCU, comprising: the first transceiver module, for connecing
Receive the optical signal from optical line terminal OLT；Filtering module, for converting optical signals to electric signal, according in coaxial network
The identifier of coaxial network unit CNU electric signal is filtered；Second transceiver module, for sending out filtered electric signal
It send to corresponding coaxial network unit.
Preferably, the optical-fiber network of OCU connection is ethernet passive optical network EPON, and identifier is the Logical link ID of CNU
LLID (Logical Link Identifier) or MAC Address.
Preferably, the optical-fiber network of OCU connection is gigabit passive optical network GPON, and identifier is the GEM PORT-ID of CNU
Or sequence number.
Preferably, filtering module includes optical network unit ONU and rate adaptation module, wherein optical network unit ONU is used
The optical signal from OLT is received in passing through the first transceiver module, and obtains the LLID information that OLT is CNU distribution from optical signal,
And configuration is filtered to rate adaptation module according to the distribution information of LLID；Rate adaptation module, for turning optical signal
It is changed to electric signal, and according to configuration information from the data for filtering out the CNU for being not belonging to connect under OCU in electric signal.
Preferably, the second transceiver module includes: coaxial line termination CLT, for being sent to electric signal by coaxial network
Corresponding coaxial network unit.
In the present invention, for Opto-electronic system, downlink message is carried out based on the identifier of CNU using OCU equipment
Filtering to filter out the data for being not belonging to be connected to the CNU under OCU, and then reaches in Opto-electronic system optical-fiber network and same
The effect of axis network rate adaptation.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the PON+EOC system architecture diagram according to the relevant technologies；
Fig. 2 is the data transmission method of Opto-electronic system according to an embodiment of the present invention；
Fig. 3 is the same axle unit of light according to an embodiment of the present invention (OCU) structural block diagram；
Fig. 4 is according to embodiments of the present invention one PON+EPOC system architecture diagram；
Fig. 5 is the data transmission method flow chart of according to embodiments of the present invention two Opto-electronic system.
Specific embodiment
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and in combination with Examples.It should be noted that not conflicting
In the case of, the features in the embodiments and the embodiments of the present application can be combined with each other.
Fig. 2 is the data transmission method of Opto-electronic system according to an embodiment of the present invention.As shown in Fig. 2, including following
Step:
Step S202, light receive the optical signal of optical line terminal OLT in optical-fiber network with axle unit OCU, and by light
Signal is converted to electric signal.
Step S204, OCU are filtered electric signal according to the identifier of the coaxial network unit CNU in coaxial network,
And filtered electric signal is sent to corresponding coaxial network unit.
In the present embodiment, downlink message is filtered based on the identifier of CNU by OCU equipment, to filter out
The data for the CNU being connected under OCU are not belonging to, and then reach optical-fiber network and coaxial network rate adaptation in Opto-electronic system
Effect.
Before above-mentioned steps S202, the light for the optical line terminal OLT that OCU is received in optical-fiber network is further comprised the steps of:
Before signal, further includes: CNU is registered to OLT；OLT is that CNU distributes LLID/GEM PORT-ID；OCU is according to from OLT's
LLID/GEM PORT-ID information configuration filter table.
Wherein, filtering in step S204 is according to including: that EPON OLT can be used the CNU of OCU connection to use
The GEM PORT- that the CNU of OCU connection is used can be used for GPON OLT as unique identifier in LLID or MAC Address etc.
ID or sequence number etc. are used as unique identifier.OCU is not belonging to connect under OCU from filtering out in electric signal according to configuration information
The data of CNU.
Fig. 3 is the same axle unit of light according to an embodiment of the present invention (OCU) structural block diagram.As shown in figure 3, the same axle unit of the light
It include: the first transceiver module 10, for receiving the optical signal of the optical line terminal OLT in optical-fiber network；Filtering module 20 is used
In converting optical signals to electric signal, according to the identifier of the coaxial network unit CNU in coaxial network to electrical signal data into
Row filtering；Second transceiver module 30, for filtered electrical signal data to be sent to corresponding coaxial network unit.Wherein,
First transceiver module 10, filtering module 20 and the second transceiver module 30 successively couple.
In the present embodiment, filtering module 20 is filtered downlink message based on the identifier of CNU, to filter out not
Belong to the data for the CNU being connected under OCU, and then reaches the effect of optical-fiber network and coaxial network rate adaptation in Opto-electronic system
Fruit.
Embodiment one
Fig. 4 is according to embodiments of the present invention one PON+EPOC system architecture diagram.As shown in figure 4, optical-fiber network part includes
The photosphere part of OLT+ODN+EPoC OCU, coaxial network part include the electric layer part+CDN (Coaxial of EPoC OCU
Distributed Unit)+CNU, in the architecture, the user side of CNU and OCU are the physical layer based on Coax, but MAC meeting
The MAC OCU for reusing EPON is connected between optical-fiber network and coaxial network.
OCU includes light-receiving sending module 10 (being equivalent to the first transceiver module in embodiment above), 21 and of ONU module
Rate adaptation module 22 (ONU module 21 and rate adaptation module 22 are functionally equivalent to filtering module hereinbefore).Wherein:
Light-receiving sending module 10 is used to receive the optical signal that OLT is sent to from the sum that OLT comes, and part is received light letter
Number it is sent to ONU module 21.
ONU module 21 obtains the control information to rate adaptation module from received optical signal, and to progress rate adaptation
Module 22 is configured.
Rate adaptation module 22 receives the number letter for becoming electric signal after the optical signal of the light-receiving sending module 10 of PON
Breath, and rate adaptation is carried out according to the configuration information of ONU module 21, and the data after adaptation are modulated on wire cable.
ONU module 21 includes filtering the data for the CNU for being not belonging to be connected under OCU to the configuration of rate adaptation module 22,
The filtering foundation of rate adaptation module 22 includes: the LLID or MAC Address that are used using the CNU of OCU connection for EPON OLT
Deng as foundation is filtered, for GPON OLT, using the CNU of the OCU connection GEM PORT-ID used and sequence number etc. as
Filter foundation.
The process of realization digit rate adaptation includes: the configuration information that the ONU module of OCU is adapted to from OLT receiving velocity, and is configured
Rate adaptation module, rate adaptation module are filtered according to data of the configuration information to the CNU for being not belonging to connect under OCU.
Embodiment two
Fig. 5 is the data transmission method flow chart of according to embodiments of the present invention two Opto-electronic system.The present embodiment tool
Body describes how to be filtered the data that can be carried more than wire cable network.As shown in figure 5, in embodiment, OLT
It is to support 10G EPON optical interface, is connected by 10G EPON interface with the same axle unit of light (OCU), light passes through wired with axle unit
Cable is connected with CNU.
In the present embodiment, OCU is analyzed and is filtered to downlink data message according to the LLID that OLT distributes to CNU, from
And carry out rate adaptation, wherein the rate transfer capability of the PON mouth of OLT is 10Gbps, and the electric layer maximum rate ability of OCU
For 1Gbps, the operation multicast service of the CNU of OCU connection, multicast service request bandwidth is 500Mbps.While connecting under the PON mouthfuls
10G ONU is met, unicast service is run, service request bandwidth is 5Gbps.
The detailed process of the present embodiment includes:
Step S502:ONU, OCU and CNU are powered on, and complete initialization procedure.
During initialization, the ONU Module registers in OCU are also registered to OLT to OLT, CNU, and OLT is according to CNU pairs
Support situation and MPCP (the multipoint control protocol) agreement of LLID arrives CNU distribution 1 multiple unique
LLID.OLT is communicated with the ONU module on OCU, and ONU module carries out configured rate adaptation module, guarantees the CNU of the OCU second line of a couplet
Related data can be received.The LLID data of all CNU connected under configuration OCU pass through digit rate adaptation module.
Step S504: after the completion of initialization, the unicast of ONU and CNU, multicast service operation.
The PON mouth downlink of step S506:OLT forwards the broadcast traffic of 5.5Gbps simultaneously, after data reach OCU, OCU
Optical signal is become electric signal, when electrical signal data through-rate adaptation module, rate adaptation module is filtered according to LLID
Data, due to CNU on-demand multicasting business, multicast service here not can be filtered, but the data of other ONU program requests of 5G
It will be filtered out, so filtered data are just the multicast service of 500M.
Multicast data packet forwarding after rate adaptation to CNU, is completed the multicast of entire CNU by step S508, OCU
Business Stream down forwards process.
The rate adaptation of OCU is carried out according to the unique LLID for the CNU distribution that OLT is OCU link in the present embodiment, practical
Application can also be filtered according to unique identifiable other identifier symbol of other OCU or CNU, reach rate
The target of adaptation.
It can be seen from the above description that the present invention realizes following technical effect:
By in the Opto-electronic system of PON+EOC, in the OCU equipment of EOC to downlink message according to OCU or
The feature that some of CNU can uniquely identify is filtered downlink message, abandons invalid message, only to effective message into
Row forwarding, to complete the normal repeating process of downlink data message, reaches the target of rate adaptation.
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, it is thus possible to which they are stored
It is performed by computing device in the storage device, and in some cases, it can be to be different from shown in sequence execution herein
Out or description the step of, perhaps they are fabricated to each integrated circuit modules or by them multiple modules or
Step is fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hardware and softwares to combine.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art 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 data transmission method of Opto-electronic system characterized by comprising
Light receives the optical signal from optical line terminal OLT with axle unit OCU, and the optical signal is converted to electric signal；
The OCU is filtered the electric signal according to the identifier of the coaxial network unit CNU in coaxial network, and incited somebody to action
Electric signal after filter is sent to the coaxial network unit；
Wherein, the OCU is filtered packet to the electric signal according to the identifier of the coaxial network unit CNU in coaxial network
Include: the OCU is not belonging to the data of the CNU connected under the OCU from filtering in the electric signal according to configuration information.
2. the method according to claim 1, wherein the optical-fiber network in the Opto-electronic system is that ether is passive
Optical-fiber network EPON, the identifier are the Logical link ID LLID or MAC Address of the CNU.
3. the method according to claim 1, wherein optical-fiber network in the Opto-electronic system be gigabit without
Source optical-fiber network GPON, the identifier are the GEM-PORTID or sequence number of the CNU.
4. according to the method described in claim 2, it is characterized in that, OCU receive the optical signal from optical line terminal OLT it
Before, further includes:
The CNU is registered to the OLT；
The OLT is that the CNU distributes the LLID；
The OCU is according to the configurating filtered table of LLID from the OLT.
5. a kind of light is the same as axle unit OCU characterized by comprising
First transceiver module, for receiving the optical signal from optical line terminal OLT；
Filtering module, for the optical signal to be converted to electric signal, according to the mark of the coaxial network unit CNU in coaxial network
Know symbol to be filtered the electric signal；
Second transceiver module, for filtered electric signal to be sent to the corresponding coaxial network unit；
Wherein, the filtering module is used to be not belonging to connect under the OCU from filtering in the electric signal according to configuration information
The data of CNU.
6. OCU according to claim 5, which is characterized in that the light is that ether is passive with the optical-fiber network that axle unit connects
Optical-fiber network EPON, the identifier are the Logical link ID LLID or MAC Address of the CNU.
7. OCU according to claim 5, which is characterized in that the optical-fiber network that the light is connected with axle unit be gigabit without
Source optical-fiber network GPON, the identifier are the GEM-PORTID or sequence number of the CNU.
8. OCU according to claim 6, which is characterized in that the filtering module includes that optical network unit ONU and rate are suitable
With module, wherein
The optical network unit ONU for being received by the first transceiver module come the optical signal of the OLT, and is believed from the light
The LLID information that the OLT is CNU distribution is obtained in number, and according to the distribution information of the LLID to rate adaptation mould
Block is filtered configuration；
The rate adaptation module, for the optical signal to be converted to electric signal, and according to configuration information from the electric signal
In filter out the data for being not belonging to the CNU connected under the OCU.
9. according to the described in any item OCU of claim 5 to 8, which is characterized in that second transceiver module includes:
Coaxial line termination CLT, for the electric signal to be sent to the corresponding coaxial network unit by coaxial network.
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| CN108092912A (en) * | 2017-11-30 | 2018-05-29 | 武汉丰天鼎业信息网络有限公司 | Inhibit the method for EOC data interference |
| CN109951749A (en) * | 2019-03-06 | 2019-06-28 | 湖北省广播电视信息网络股份有限公司 | The method and system that the business of PON+EOC networking is opened automatically |
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| US6763025B2 (en) * | 2001-03-12 | 2004-07-13 | Advent Networks, Inc. | Time division multiplexing over broadband modulation method and apparatus |
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| CN101453672A (en) * | 2006-04-26 | 2009-06-10 | 华为技术有限公司 | Optical network terminal, port speed limiting attribute configuration method and packet process method |
| CN101494595A (en) * | 2008-01-22 | 2009-07-29 | 杭州华三通信技术有限公司 | Method and system for forwarding data message, coaxial line terminal and optical network unit |
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