CN105703836B - Optical module for optical network unit - Google Patents
Optical module for optical network unit Download PDFInfo
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- CN105703836B CN105703836B CN201610217922.7A CN201610217922A CN105703836B CN 105703836 B CN105703836 B CN 105703836B CN 201610217922 A CN201610217922 A CN 201610217922A CN 105703836 B CN105703836 B CN 105703836B
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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
- H04B10/40—Transceivers
-
- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
Abstract
The invention discloses a kind of optical module for optical network unit, including laser pick-off unit, and corresponding electric signal is exported for receiving the downlink optical signal of the transmission of the optical line terminal OLT in EPON, and according to the downlink optical signal of reception；Media access control MAC protocol processing unit, for receiving the electric signal of laser pick-off unit output, the data for the electric signal received from laser pick-off unit obtain after MAC protocol processing export；Physical layer PHY unit, it is encapsulated as sending to ustomer premises access equipment by network cable after data frame for receiving the data of MAC protocol processing unit output, and by the data received from MAC protocol processing unit；MCU units, for being communicated with MAC protocol processing unit.Due to being integrated with MAC protocol processing unit and PHY unit in optical module for optical network unit, it is possible to achieve the MAC protocol conversion of Ethernet and the data-transformation facility of LAN, so as to which optical module for optical network unit directly can be connected with ustomer premises access equipment.
Description
This case is on October 09th, 2012 submitting, Application No. 201210381150.2, patent name are passive optical network
The divisional application of network and its optical module for optical network unit.
Technical field
The present invention relates to Fibre Optical Communication Technology, more particularly to a kind of optical module for optical network unit.
Background technology
Current domestic market and international market, the fiber optic communication direction merged with a large bandwidth and at a high rate with multiple business
Have begun to apply；In numerous solutions, fiber to the home（FTTH）Appearance be just considered as the ultimate of broadband access
Solution.
But FTTB has largely laid in the country at present（FTTB）Or FTTC（Fiber To The Curb）Network, FTTB/
FTTC is a kind of network of optical cable/copper cable hybrid system, as shown in figure 1, the OLT from central office（Optical Line
Terminator, optical line terminal）Signal transmission between roadside or building side within to leave home 1,000 feet of front yard or office
Using optical cable；Pass through interchanger（Switch）And coaxial cable signal is transmitted from roadside or building side again in getting home or office
In ustomer premises access equipment, the LAN switch in such as computer, intelligent television or family.
During being FTTH networks by FTTB/FTTC network upgrades, because ustomer premises access equipment generally can not directly be located
Ricoh's signal, therefore, the FTTH networks generally upgraded, as shown in Figure 2.The OLT of central office passes through ODN（Light feeder network）With
POS（Passive Optical Splitter, passive optical splitters）It is connected, POS is often referred to simply as Splitter（Optical splitter）, one
As there is 2N to divide equally ports, if the light intensity of its uplink port input is 1, the light intensity of each of which downlink port output is 1/N.
For a FTTH network, usually 1 OLT is placed on telecommunication center office, then by optical splitter, typically at least 1 point 32, or
Person 1 divides 64 or even 1 point 128, i.e. 1 OLT band 32 or 64 or 128 ONU optical modules.Each ONU optical modules and an ONU system
System equipment is connected, and ONU system equipments are connected with the ustomer premises access equipment in family or in office, is sent to receive ustomer premises access equipment
Electric signal, send in the upstream direction to OLT after being converted to optical signal by ONU optical modules, and ONU optical modules are received
Optical signal is converted to the receivable electric signal of ustomer premises access equipment and sent to ustomer premises access equipment.
But it was found by the inventors of the present invention that the FTTH networks of prior art in local side due to needing for each ONU optical modes
Block be equipped with an ONU system equipment, the cost put into during network upgrade is higher, also, ONU system equipments need take compared with
Big exterior space.
The content of the invention
The embodiment provides a kind of optical module for optical network unit, to reduce FTTH network costs, saves net
Network space-consuming.
According to an aspect of the invention, there is provided a kind of optical module for optical network unit, including：Laser pick-off unit, use
Exported in the downlink optical signal for receiving the transmission of the optical line terminal OLT in EPON, and according to the downlink optical signal of reception
Corresponding electric signal；
Media access control MAC protocol processing unit, for receiving the electric signal of laser pick-off unit output, to from laser
The data that the electric signal that receiving unit receives obtained after MAC protocol processing are exported；
Physical layer PHY unit, for receiving the data of MAC protocol processing unit output, and will be from MAC protocol processing unit
The data of reception are encapsulated as sending to ustomer premises access equipment by network cable after data frame；
MCU units, for being communicated with MAC protocol processing unit.
According to another aspect of the present invention, there is provided a kind of optical module for optical network unit, including physical layer PHY unit,
MAC protocol processing unit, laser emission element and MCU units；
Physical layer PHY unit, for receiving the data frame of ustomer premises access equipment transmission, data frame is parsed, will be parsed
Obtained data are sent to MAC protocol processing unit；
MAC protocol processing unit, the data for PHY unit to be sent carry out MAC protocol processing, the electricity that processing is obtained
Signal output is to laser emission element；
Laser emission element, for sending corresponding uplink optical signal to optical line terminal OLT according to electric signal；
MCU units, for being communicated with MAC protocol processing unit.
It is mono- due to being integrated with MAC protocol processing unit and PHY in optical module for optical network unit provided in an embodiment of the present invention
Member, it is possible to achieve the MAC protocol conversion of Ethernet and the data-transformation facility of LAN, so as to which optical module for optical network unit can be with
Directly it is connected with ustomer premises access equipment, optical network unit system equipment need not be set again in EPON, so as to greatly reduce
The cost of optical-fiber network, also save space shared by optical-fiber network.
Brief description of the drawings
Fig. 1 is the FTTB/FTTC network diagrams of prior art；
Fig. 2 is the FTTH network diagrams of prior art；
Fig. 3 is the FTTH network diagrams of the embodiment of the present invention；
Fig. 4 is the optical module for optical network unit internal circuit schematic diagram of the embodiment of the present invention；
Fig. 5 is the laser emission element internal circuit schematic diagram of the embodiment of the present invention；
Fig. 6 is the laser acquisition unit internal circuit schematic diagram of the embodiment of the present invention；
Fig. 7 is the SFP encapsulation schematic diagrams of the optical module for optical network unit of the embodiment of the present invention；
Fig. 8 is the external pin schematic diagram of the optical module for optical network unit of the embodiment of the present invention.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, referring to the drawings and preferred reality is enumerated
Example is applied, the present invention is described in more detail.However, it is necessary to illustrate, many details listed in specification are only to be
Reader is set to have a thorough explanation to the one or more aspects of the present invention, even without these specific details can also
Realize the aspects of the invention.
The term such as " module " used in this application, " system " is intended to include the entity related to computer, such as but unlimited
In hardware, firmware, combination thereof, software or executory software.For example, module can be, it is not limited to：Processing
The process run on device, processor, object, executable program, thread, program and/or the computer performed.
In technical scheme, the optical module for optical network unit of FTTH networks, except realizing optical signal and electric signal
Between outside the function changed, also by using the pmd layer and GE MAC of integrated IEEE 802.3ah agreements（Media
Access Control, media access control）Layer（With SERDES）Chip realize Ethernet data exchange function, because
This, optical module for optical network unit can not be connected by ONU system equipments with ustomer premises access equipment, but directly by cable with using
Family end equipment is connected, and saves space and the production cost of network occupancy.
The technical scheme for embodiment that the invention will now be described in detail with reference to the accompanying drawings.The EPON of the embodiment of the present invention,
As shown in figure 3, including：OLT301, POS302, multiple ONU optical modules 303.
OLT301 is connected by optical fiber with POS302 uplink port, each ONU optical modules 303 by optical fiber respectively with
POS302 each downlink port is connected, so as to each ONU optical modules 303 realized by optical fiber and POS402 it is logical with OLT301
Letter.
The ONU optical modules 303 of the embodiment of the present invention can directly and ustomer premises access equipment（As router, interchanger, computer,
Computer etc.）Directly it is connected by cable.I.e. ONU optical modules 303 can pass through network electricity with the ustomer premises access equipment in LAN
Cable is connected, and is communicated：Receive ustomer premises access equipment send data, by ustomer premises access equipment send data through MAC protocol at
After reason, be converted to uplink optical signal and sent by optical fiber to OLT301；ONU optical modules 303 can also receive what OLT301 was sent
After downlink optical signal, downlink optical signal is converted into electric signal, and the data obtained after MAC protocol is handled pass through network cable
It is sent to ustomer premises access equipment.
The internal circuits of ONU optical modules 303 as shown in figure 4, including：Laser emission element 401, laser pick-off unit 402,
MAC protocol processing unit 403, MCU（Microprogrammed Control Unit, microprogram control unit）Unit 404, PHY
（Physical layer）Unit 405.
Laser emission element is generally included in ONU optical modules, to launch uplink optical signal according to the electric signal of reception, on
Traveling optical signal is transferred to OLT301 after optical fiber, POS402；
Also include laser pick-off unit in ONU optical modules, to receive the downlink optical signal of OLT transmissions, according to reception
Downlink optical signal exports corresponding electric signal.The downlink optical signal that OLT301 is sent is transferred to ONU optical modes after optical fiber, POS402
Block 303.
Laser pick-off unit 402 in ONU optical modules 303 as shown in figure 5, including：Light-receiving component and limited range enlargement electricity
Road；Light-receiving component generally includes：Photodiode, trans-impedance amplifier TIA.Photodiode is detecting OLT301 transmissions
Corresponding response current is exported after downlink optical signal and then exports corresponding differential electric signal to TIA, TIA；The differential signal is sent
To amplitude limiting amplifier circuit, the differential signal is carried out limited range enlargement, exports corresponding electric signal to MAC protocol by amplitude limiting amplifier circuit
Processing unit 403.
MAC protocol processing unit 403 is connected with laser pick-off unit 402, to receive the amplitude limit of laser pick-off unit 402
The electric signal of amplifying circuit output（Downstream signal）, the electric signal received from laser pick-off unit 402 is carried out at MAC protocol
The data obtained after reason, it is output to PHY unit 405.Specifically, the protocol processing chip of MAC protocol processing unit 403 is receiving
After the electric signal that laser pick-off unit 402 exports, by Gigabit SerDes built-in in chip by the serial data of reception
It is changed into parallel data, and parallel data is reconverted into serial data after MAC protocol is handled and is output to PHY unit 405
It is transmitted.MAC protocol processing of the protocol processing chip to downstream signal can specifically include：FEC（Forward error correction）、
802.3ah protocol processes, 802.1D protocol processes, 802.1ad protocol processes, 802.1Q protocol processes, GE MAC（Gigabit ether
Net medium access control）、GE SERDES（Gigabit serioparallel exchange）Processing.Protocol processes core in MAC protocol processing unit 403
Piece can specifically use Atheros8829 chips.
Either in traditional cable LAN（LAN）In or in currently a popular WLAN（WLAN）In, MAC
Agreement is all widely used.In a local network, the physical layer of various transmission mediums corresponds to corresponding MAC layer, universal at present
The network used using IEEE 802.3 MAC layer standard.
The uplink port of PHY unit 405 is connected with MAC protocol processing unit 403, for receiving MAC protocol processing unit
The data of 403 outputs.The downlink port of PHY unit 405 passes through cable（Or network cable）It is connected with ustomer premises access equipment, receives
The data or send data to family end equipment that ustomer premises access equipment is sent.
PHY refers to physical layer, refers generally to the chip with external signal interface, i.e. generally signified network interface card.Network interface card is also referred to as network
Adapter, it is the equipment that computer is connected with each other with LAN.Either common computer or high-end server or miscellaneous equipment,
LAN is connected to if desired, it is necessary to which one piece of network interface card is installed.
PHY unit 405 plays a part of network adapter, and the data that MAC protocol processing unit 403 exports are encapsulated as
Packet（Or data frame）Afterwards by network, i.e., sent by cable to ustomer premises access equipment.
PHY unit 405 parses data frame, will solved from data frame after the data frame of ustomer premises access equipment transmission is received
The data of precipitation are sent to MAC protocol processing unit 403.PHY chip in PHY unit 405 can specifically use
The chips such as RTL8201BL, VT6103.
SGMII can specifically be passed through between MAC protocol processing unit 403 and PHY unit 405（Serial Gigabit
Media Independent Interface, Serial Gigabit Media Independent Interface）Interface transmission data.
MAC protocol processing unit 403 is also connected with laser emission element 401, and MAC protocol processing unit 403 is receiving
After the data that PHY unit 405 is sent, the electric signal output for the data of reception obtain after MAC protocol processing is sent out to laser
Penetrate unit 401.Specifically, MAC protocol processing unit 403 carries out up letter after the data of the transmission of PHY unit 405 are received
Number MAC protocol processing：GE SERDES（Gigabit serioparallel exchange）、 GE MAC（Gigabit Ethernet medium access control）、
802.1Q protocol processes, 802.1ad protocol processes, 802.1D protocol processes, 802.3ah protocol processes, FEC（Forward error correction）；
MAC protocol processing unit 403 by from the data that PHY unit 405 receives through Gigabit built-in in protocol processing chip
SerDes carries out MAC protocol processing after being changed into parallel data, and the data after MAC protocol is handled are converted into serial data
Electric signal after, be output to laser emission element 401.
After laser emission element 401 receives the electric signal of the output of MAC protocol processing unit 403, according to the telecommunications of reception
Number send corresponding uplink optical signal to OLT301.Specifically, laser emission element 401 as shown in fig. 6, including：Laser and
Its drive circuit.After the drive circuit of laser emission element 401 receives the electric signal of the output of MAC protocol processing unit 403, root
According to the laser of the laser light emitting light source transmitting specific wavelength in the electric signal driving laser of reception as uplink optical signal.
Mainly include MCU chip in MCU units 404, implemented function such as by MCU chip：
MCU units 404 can be communicated by iic bus or other universal serial bus or parallel bus with drive circuit, to
Drive circuit, or the parameter of configuration driven circuit are controlled, realizes the digital supervision and control function to laser emission element 401；
MCU units 404 can also be led to by iic bus or other universal serial bus or parallel bus with amplitude limiting amplifier circuit
Letter, to control amplitude limiting amplifier circuit, or the parameter of configuration amplitude limiting amplifier circuit, realize the numeral to laser pick-off unit 402
Monitoring and control function；
In addition, MCU units 404 can also handle list by iic bus or other universal serial bus or parallel bus with MAC protocol
Member 403 communicates, to realize the functions such as the software upgrading of MAC protocol processing unit 403, order test, Serial Port Information acquisition；
MCU units 404 can also be mono- by iic bus or SGMII interfaces or other universal serial bus or parallel bus and PHY
Member 405 communicates, to realize the control to PHY chip.
The also recognizable instruction for obtaining OLT301 and sending of MCU units 404.Specifically, MAC protocol processing unit 403 is right
, should if judging, identifying the signaling that the downstream signal of reception sends as OLT301 after the MAC protocol processing of downstream signal
Signaling is sent to MCU units 404, and MCU units 404 parse from the signaling of reception obtains the instruction that OLT301 is sent.MCU units
404 instructions sent according to OLT301 carry out corresponding operating, can specifically include：Control the laser emission element of this optical module
401st, laser pick-off unit 402, MAC protocol processing unit 403, PHY unit 405, or corresponding data is returned to OLT301, so as to
Realize remote controls of the OLT301 to this ONU optical modules.
MCU chip in MCU units 404 can be single-chip microcomputer, microprocessor, CPU, FPGA etc..
Discrete chip can be respectively adopted with MCU units 404 in above-mentioned MAC protocol processing unit 403：Protocol processes core
Piece and MCU chip are realized, can be also integrated into a chip and be realized.
In addition, memory cell 406 is may also include in ONU optical modules 303.MCU units 404 are connected with memory cell 406, deposit
Storage unit 406 is storing parameter or instruction etc..
It is above-mentioned to be integrated with IEEE 802.3ah EPON MAC chips and digital monitoring function and over long distances the ONU light of communication
Module 303 can be as shown in Figure 7 using the package casing of SFP optical modules, the schematic diagram of SFP package casings；Can from Fig. 7
Go out, the optical module space-consuming for being integrated with MAC functions is very small.Fig. 8 shows the external of the ONU optical modules of the embodiment of the present invention
Pin schematic diagram.
It is mono- due to being integrated with MAC protocol processing unit and PHY in optical module for optical network unit provided in an embodiment of the present invention
Member, it is possible to achieve the MAC protocol conversion of Ethernet and the data-transformation facility of LAN, so as to which optical module for optical network unit can be with
Directly it is connected with ustomer premises access equipment, optical network unit system equipment need not be set again in EPON, so as to greatly reduce
The cost of optical-fiber network, also save space shared by optical-fiber network.
Can be with one of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method is
The hardware of correlation is instructed to complete by program, the program can be stored in a computer read/write memory medium, such as：
ROM/RAM, magnetic disc, CD etc..
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (9)
- A kind of 1. optical module for optical network unit, it is characterised in that including：Laser pick-off unit, for receiving the downlink optical signal of the transmission of the optical line terminal OLT in EPON, and according to connecing The downlink optical signal of receipts exports corresponding electric signal；Media access control MAC protocol processing unit, for receiving the electric signal of laser pick-off unit output, to from described The data that the electric signal that laser pick-off unit receives obtained after MAC protocol processing are exported；Physical layer PHY unit, for receiving the data of the MAC protocol processing unit output, and it will be handled from the MAC protocol The data that unit receives are encapsulated as sending to ustomer premises access equipment by network cable after data frame；MCU units, for being communicated with the MAC protocol processing unit.
- 2. optical module for optical network unit as claimed in claim 1, it is characterised in that the MAC protocol processing unit is under After row signal carries out MAC protocol processing, if the signaling that the downstream signal of reception sends as the OLT being judged, identifying, by institute State signaling and be sent to the MCU units, the MCU units parse from the signaling of reception obtains the finger that the OLT is sent Order.
- 3. optical module for optical network unit as claimed in claim 1, it is characterised in that the MCU units are realizing the MAC The software upgrading of protocol processing unit.
- 4. optical module for optical network unit as claimed in claim 1, it is characterised in that the MCU units are additionally operable to and the PHY Unit communication, to control the PHY chip in the PHY unit.
- 5. the optical module for optical network unit as described in Claims 2 or 3 is any, it is characterised in that the MCU units pass through IIC Bus or other universal serial bus or parallel bus communicate with the MAC protocol processing unit.
- 6. optical module for optical network unit as claimed in claim 4, it is characterised in that the MCU units by iic bus or SGMII interfaces or other universal serial bus or parallel bus communicate with the PHY unit.
- A kind of 7. optical module for optical network unit, it is characterised in that including：Physical layer PHY unit, MAC protocol processing unit, laser Transmitter unit and MCU units；The physical layer PHY unit, for receiving the data frame of ustomer premises access equipment transmission, the data frame is parsed, will Parse obtained data and be sent to the MAC protocol processing unit；The MAC protocol processing unit, the data for the PHY unit to be sent carry out MAC protocol processing, processing are obtained Electric signal output to the laser emission element；The laser emission element, for sending corresponding uplink optical signal to optical line terminal OLT according to the electric signal；The MCU units, for being communicated with the MAC protocol processing unit.
- 8. optical module for optical network unit as claimed in claim 7, it is characterised in that the MCU units are realizing the MAC The software upgrading of protocol processing unit.
- 9. optical module for optical network unit as claimed in claim 7, it is characterised in that the MCU units are additionally operable to and the PHY Unit communication, to control the PHY chip in the PHY unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610217922.7A CN105703836B (en) | 2012-10-09 | 2012-10-09 | Optical module for optical network unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210381150.2A CN102916746B (en) | 2012-10-09 | 2012-10-09 | EPON and optical module for optical network unit thereof |
| CN201610217922.7A CN105703836B (en) | 2012-10-09 | 2012-10-09 | Optical module for optical network unit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210381150.2A Division CN102916746B (en) | 2012-10-09 | 2012-10-09 | EPON and optical module for optical network unit thereof |
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| CN105703836A CN105703836A (en) | 2016-06-22 |
| CN105703836B true CN105703836B (en) | 2017-12-19 |
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| CN201210381150.2A Active CN102916746B (en) | 2012-10-09 | 2012-10-09 | EPON and optical module for optical network unit thereof |
| CN201610217922.7A Active CN105703836B (en) | 2012-10-09 | 2012-10-09 | Optical module for optical network unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406920B (en) * | 2015-10-30 | 2018-06-26 | 武汉光迅科技股份有限公司 | A kind of optical module for supporting gigabit Ethernet protocol processes |
| CN109923802B (en) * | 2017-01-20 | 2021-01-08 | 华为技术有限公司 | Data processing method, optical access equipment and optical access system |
| CN110535867B (en) * | 2019-09-03 | 2021-06-15 | 北京锐安科技有限公司 | Server safety device and method and server |
| CN112672237A (en) * | 2020-12-24 | 2021-04-16 | 武汉瑞盈通网络技术有限公司 | OTN equipment and control method |
| CN117240355B (en) * | 2023-11-14 | 2024-02-02 | 四川泰瑞创通讯技术股份有限公司 | Optical module rate self-adaptive adjustment method, device, equipment and readable storage medium |
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| CN1933373A (en) * | 2005-09-16 | 2007-03-21 | Lg-北电株式会社 | Optical line terminal in a wavelength division multiplexing passive optical network |
| CN101075853A (en) * | 2007-06-26 | 2007-11-21 | 上海大学 | Optical network unit of Ethernet passive optical network |
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| CN101039148B (en) * | 2007-02-07 | 2011-04-06 | 华为技术有限公司 | Optical module and method and network equipment for supporting GE optical connector and FE optical connector |
| CN101188502A (en) * | 2007-12-06 | 2008-05-28 | 上海大学 | Ethernet passive optical network transfer unit with telecom E1 interface |
| CN101394678B (en) * | 2008-11-07 | 2010-12-08 | 烽火通信科技股份有限公司 | Serialization/de-serialization interface module generally used in GEPON/GPON |
| CN201766683U (en) * | 2010-03-29 | 2011-03-16 | 华为技术有限公司 | USB network card of PON (passive optical network) |
| CN101867411B (en) * | 2010-06-17 | 2016-04-13 | 中兴通讯股份有限公司 | Realize the method, system and device of passive optical network optical fiber protection |
| US8903250B2 (en) * | 2010-08-20 | 2014-12-02 | Broadcom Corporation | Cost-effective multi-rate upstream for 10GEPON based on high efficiency coding |
| CN102131132A (en) * | 2010-11-04 | 2011-07-20 | 华为技术有限公司 | Energy-saving method and equipment for passive optical network (PON) |
| CN102638735B (en) * | 2012-04-13 | 2015-07-01 | 瑞斯康达科技发展股份有限公司 | Optical node device and business switching method thereof |
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| CN1933373A (en) * | 2005-09-16 | 2007-03-21 | Lg-北电株式会社 | Optical line terminal in a wavelength division multiplexing passive optical network |
| CN101075853A (en) * | 2007-06-26 | 2007-11-21 | 上海大学 | Optical network unit of Ethernet passive optical network |
| CN102437941A (en) * | 2011-10-19 | 2012-05-02 | 烽火通信科技股份有限公司 | Ethernet passive optical network (EPON) optical network unit fusing Ethernet over coaxial cable (EoC) function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102916746A (en) | 2013-02-06 |
| CN102916746B (en) | 2016-03-30 |
| CN105703836A (en) | 2016-06-22 |
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