CN105703836A - Optical module of optical network unit - Google Patents
Optical module of optical network unit Download PDFInfo
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- CN105703836A CN105703836A CN201610217922.7A CN201610217922A CN105703836A CN 105703836 A CN105703836 A CN 105703836A CN 201610217922 A CN201610217922 A CN 201610217922A CN 105703836 A CN105703836 A CN 105703836A
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- mac protocol
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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
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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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
Abstract
The invention discloses an optical module of an optical network unit. The optical module includes a laser receiving unit used for receiving downlink optical signals sent by an OLT (Optical Line Terminal) in a passive optical network and outputting corresponding electric signals according to the received downlink optical signals; an MAC (Media Access Control) protocol processing unit used for receiving electric signals output by the laser receiving unit and outputting data obtained by subjecting the electric signals received by the laser receiving unit to MAC protocol treatment; a PHY (Physical Layer) unit used for receiving data output by the MAC protocol processing unit, packaging data received from the MAC protocol processing unit into data frames and then sending the data frames to user terminal equipment through a network cable; and an MCU used for communicating with the MAC protocol processing unit. Since the optical module of the optical network unit integrates the MAC protocol processing unit and the PHY unit, Ethernet MAC protocol conversion and local area network data transmission can be realized. Therefore, the optical module of the optical network unit can be directly connected to the user terminal equipment.
Description
The divisional application that this case is that on October 09th, 2012 submits to, application number is 201210381150.2, patent name is EPON and optical module for optical network unit thereof。
Technical field
The present invention relates to Fibre Optical Communication Technology, particularly relate 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 multiple business with a large bandwidth and at a high rate has begun to application；In numerous solutions, the appearance of fiber to the home (FTTH) is just considered as the ultimate solution of broadband access。
But domestic at present laid FTTB(FTTB in a large number) or FTTC(Fiber To The Curb) network, FTTB/FTTC is the network of a kind of optical cable/copper cable hybrid system, as shown in Figure 1, from the OLT(OpticalLineTerminator of central office, optical line terminal) signal transmission between roadside or the limit, building within leave home front yard or 1,000 feet of office adopts optical cable；Ustomer premises access equipment again signal being got home from roadside or the transmission of limit, building by switch (Switch) and coaxial cable or in office, the LAN switch etc. in computer, intelligent television or family。
By in process that FTTB/FTTC network upgrade is FTTH network, owing to ustomer premises access equipment is generally not capable of directly processing optical signal, therefore, the generally FTTH network of upgrading, as shown in Figure 2。The OLT of central office passes through ODN(light feeder network) and POS(PassiveOpticalSplitter, passive optical splitters) it is connected, POS is often referred to simply as Splitter(beam splitter), 2N is generally had to divide equally port, if the light intensity of its uplink port input is 1, then the light intensity of each of which downlink port output is 1/N。For a FTTH network, it is usually 1 OLT and is placed on telecommunication center office, then pass through beam splitter, be typically at least 1 point 32, or 1 point 64 even 1 point 128, namely 1 OLT is with 32 or 64 or 128 ONU optical modules。Each ONU optical module and an ONU system equipment are connected, ONU system equipment is connected with the ustomer premises access equipment in family or in office, in order to receive the signal of telecommunication that ustomer premises access equipment sends, send in the upstream direction after being converted to optical signal by ONU optical module to OLT, and the optical signal that ONU optical module receives is converted to the receivable signal of telecommunication of ustomer premises access equipment sends to ustomer premises access equipment。
But it was found by the inventors of the present invention that the FTTH network of prior art is owing to needing to be equipped with an ONU system equipment for each ONU optical module at local side, what put in network upgrade process is relatively costly, and, ONU system equipment needs to take bigger space outerpace。
Summary of the invention
The embodiment provides a kind of optical module for optical network unit, in order to reduce FTTH network cost, save network and take up room。
According to an aspect of the invention, it is provided a kind of optical module for optical network unit, including: laser pick-off unit, for receiving the downlink optical signal that the optical line terminal OLT in EPON sends, and export the corresponding signal of telecommunication according to the downlink optical signal received；
Media interviews control MAC protocol processing unit, and for receiving the signal of telecommunication of laser pick-off unit output, the data obtained after the signal of telecommunication received from laser pick-off unit is carried out MAC protocol process export；
The data received from MAC protocol processing unit for receiving the data of MAC protocol processing unit output, and are encapsulated as after Frame by network cable to ustomer premises access equipment transmission by physical layer PHY unit；
MCU unit, for communicating with MAC protocol processing unit。
According to another aspect of the present invention, it is provided that a kind of optical module for optical network unit, including physical layer PHY unit, MAC protocol processing unit, laser emission element and MCU unit；
Physical layer PHY unit, for receiving the Frame that ustomer premises access equipment sends, resolves Frame, is sent to MAC protocol processing unit by resolving the data obtained；
MAC protocol processing unit, for the data that PHY unit sends are carried out MAC protocol process, exports laser emission element by processing the signal of telecommunication obtained；
Laser emission element, for sending corresponding uplink optical signal according to the signal of telecommunication to optical line terminal OLT；
MCU unit, for communicating with MAC protocol processing unit。
In the optical module for optical network unit that the embodiment of the present invention provides, owing to being integrated with MAC protocol processing unit and PHY unit, the MAC protocol conversion of Ethernet and the data-transformation facility of LAN can be realized, thus optical module for optical network unit can directly be connected with ustomer premises access equipment, EPON need not arrange optical network unit system equipment again, thus greatly reducing the cost of optical-fiber network, also save space shared by optical-fiber network。
Accompanying drawing explanation
Fig. 1 is the FTTB/FTTC network diagram of prior art；
Fig. 2 is the FTTH network diagram of prior art；
Fig. 3 is the FTTH network diagram 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；
The SFP that Fig. 7 is the optical module for optical network unit of the embodiment of the present invention encapsulates schematic diagram；
Fig. 8 is the external pin schematic diagram of the optical module for optical network unit of the embodiment of the present invention。
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearly understand, referring to accompanying drawing and enumerate preferred embodiment, the present invention is described in more detail。However, it is necessary to illustrate, the many details listed in description are only used to make reader that one or more aspects of the present invention are had a thorough explanation, can also realize the aspects of the invention even without these specific details。
The term such as " module " used in this application, " system " is intended to include the entity relevant to computer, for instance but it is not limited to hardware, firmware, combination thereof, software or executory software。Such as, module it may be that it is not limited to: the process run on processor, processor, object, executable program, the thread of execution, program and/or computer。
In technical scheme, the optical module for optical network unit of FTTH network, except realizing the function carrying out changing between optical signal and the signal of telecommunication, also by the pmd layer and GEMAC (MediaAccessControl that adopt integrated IEEE802.3ah agreement, media interviews control) chip of layer (with SERDES) realizes the function of Ethernet data exchange, therefore, optical module for optical network unit can not be passed through ONU system equipment and be connected with ustomer premises access equipment, but be connected with ustomer premises access equipment either directly through cable, save space and production cost that network takies。
The technical scheme of the embodiment of the present invention is described in detail below in conjunction with accompanying drawing。The EPON of the embodiment of the present invention, as it is shown on figure 3, including: OLT301, POS302, multiple ONU optical module 303。
OLT301 is connected with the uplink port of POS302 by optical fiber, and each ONU optical module 303 is connected with each downlink port of POS302 respectively by optical fiber, thus each ONU optical module 303 realizes the communication with OLT301 by optical fiber with POS402。
The ONU optical module 303 of the embodiment of the present invention can directly be connected either directly through cable with ustomer premises access equipment (such as router, switch, computer, computer etc.)。Namely ONU optical module 303 can be connected by network cable with the ustomer premises access equipment in LAN, and communicate: receive the data that ustomer premises access equipment sends, the data sent by ustomer premises access equipment, after MAC protocol processes, are converted to uplink optical signal and are sent to OLT301 by optical fiber；Downlink optical signal also after receiving the OLT301 downlink optical signal sent, can be converted to the signal of telecommunication by ONU optical module 303, and the data obtained after MAC protocol processes are sent to ustomer premises access equipment by network cable。
The internal circuit of ONU optical module 303 is as shown in Figure 4, including laser emission element 401, laser pick-off unit 402, MAC protocol processing unit 403, MCU(MicroprogrammedControlUnit, microprogram control unit) unit 404, PHY(physical layer) unit 405。
Generally including laser emission element in ONU optical module, in order to launch uplink optical signal according to the signal of telecommunication received, uplink optical signal is transferred to OLT301 after optical fiber, POS402；
ONU optical module also includes laser pick-off unit, in order to receive the OLT downlink optical signal sent, exports the corresponding signal of telecommunication according to the downlink optical signal received。The downlink optical signal that OLT301 sends is transferred to ONU optical module 303 after optical fiber, POS402。
Laser pick-off unit 402 in ONU optical module 303 is as it is shown in figure 5, include: light-receiving assembly and amplitude limiting amplifier circuit；Light-receiving assembly generally includes: photodiode, trans-impedance amplifier TIA。Photodiode exports corresponding response current after detecting the OLT301 downlink optical signal sent and then exports corresponding differential electric signal to TIA, TIA；This differential signal is sent to amplitude limiting amplifier circuit, and this differential signal is carried out limited range enlargement by amplitude limiting amplifier circuit, exports the corresponding signal of telecommunication to MAC protocol processing unit 403。
MAC protocol processing unit 403 is connected with laser pick-off unit 402, the signal of telecommunication (downstream signal) that amplitude limiting amplifier circuit in order to receive laser pick-off unit 402 exports, the data obtained after the signal of telecommunication received from laser pick-off unit 402 is carried out MAC protocol process, PHY unit 405 is arrived in output。Specifically, the protocol processes chip of MAC protocol processing unit 403 receive laser pick-off unit 402 output the signal of telecommunication after, GigabitSerDes built-in in chipThe serial data of reception is changed into parallel data, and by parallel data after MAC protocol processesIt is reconverted into serial dataOutput is transmitted to PHY unit 405。The MAC protocol of downstream signal is processed and specifically may include that FEC(forward error correction by protocol processes chip), 802.3ah protocol processes, 802.1D protocol processes, 802.1ad protocol processes, 802.1Q protocol processes, GEMAC's (gigabit Ethernet medium access control), GESERDES(gigabit serioparallel exchange) process。Protocol processes chip in MAC protocol processing unit 403 specifically can adopt Atheros8829 chip。
No matter it is in traditional cable LAN (LAN) or in currently a popular wireless lan (wlan), MAC protocol is all widely used。In a local network, the physical layer of various transmission mediums corresponds to corresponding MAC layer, and what the network commonly used at present adopted is the MAC layer standard of IEEE802.3。
The uplink port of PHY unit 405 is connected with MAC protocol processing unit 403, for receiving the data of MAC protocol processing unit 403 output。The downlink port of PHY unit 405 is connected with ustomer premises access equipment by cable (or claim network cable), receives the data of ustomer premises access equipment transmission or to family end equipment sending data。
PHY refers to physical layer, refers generally to and the chip of external signal interface, namelyThe network interface card of usual indication。Network interface card, also referred to as network adapter, is computer and the interconnective equipment of LAN。It is no matter common computer or high-end server or miscellaneous equipment, if needing to be connected to LAN, it is necessary to install one piece of network interface card。
Namely PHY unit 405 plays the effect of network adapter, the data exported by MAC protocol processing unit 403Network is passed through after being encapsulated as packet (or claiming Frame), namely sent to ustomer premises access equipment by cable。
PHY unit 405 receive ustomer premises access equipment send Frame after, resolution data frame, the data parsed from Frame are sent to MAC protocol processing unit 403。PHY chip in PHY unit 405 specifically can adopt the chips such as RTL8201BL, VT6103。
Between MAC protocol processing unit 403 and PHY unit 405 specificallySGMII(SerialGigabitMediaIndependentInterface, Serial Gigabit Media Independent Interface can be passed through) interface transmission data。
MAC protocol processing unit 403 is also connected with laser emission element 401, and MAC protocol processing unit 403 is after receiving the data that PHY unit 405 sends, and the signal of telecommunication obtained after the data received are carried out MAC protocol process exports laser emission element 401。Specifically, MAC protocol processing unit 403 receive PHY unit 405 send data after, carry out upward signal MAC protocol process: GESERDES(gigabit serioparallel exchange), GEMAC's (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)；The data received from PHY unit 405 are carried out MAC protocol process by MAC protocol processing unit 403 after GigabitSerDes built-in in protocol processes chip is changed into parallel data, after data after MAC protocol processes are converted to the signal of telecommunication of serial data, laser emission element 401 is arrived in output。
After laser emission element 401 receives the signal of telecommunication of MAC protocol processing unit 403 output, send corresponding uplink optical signal according to the signal of telecommunication received to OLT301。Specifically, laser emission element 401 as shown in Figure 6, including laser instrument and drive circuit thereof。After the drive circuit of laser emission element 401 receives the signal of telecommunication of MAC protocol processing unit 403 output, the laser light emitting light source in laser instrument is driven to launch the laser of specific wavelength as uplink optical signal according to the signal of telecommunication received。
MCU unit 404 mainly includes MCU chip, is implemented function such as by MCU chip:
MCU unit 404 can pass through iic bus or other universal serial bus or parallel bus and drive circuit communication, in order to control drive circuit, or the parameter of configuration driven circuit, it is achieved digital supervision and the control function to laser emission element 401；
MCU unit 404 can also pass through iic bus or other universal serial bus or parallel bus and amplitude limiting amplifier circuit communication, in order to control amplitude limiting amplifier circuit, or the parameter of configuration amplitude limiting amplifier circuit, it is achieved digital supervision and the control function to laser pick-off unit 402；
Additionally, MCU unit 404 communicates with MAC protocol processing unit 403 also by iic bus or other universal serial bus or parallel bus, in order to realize the function such as the software upgrading of MAC protocol processing unit 403, order test, Serial Port Information acquisition；
MCU unit 404 communicates with PHY unit 405 also by iic bus or SGMII interface or other universal serial bus or parallel bus, in order to realize the control to PHY chip。
MCU unit 404 instruction that also the recognizable OLT301 of acquisition sends。Specifically,MAC protocol processing unit 403 is after the MAC protocol process to downstream signal, if judging, identifying the signaling that downstream signal is OLT301 transmission of reception, then this signaling is sent to MCU unit 404, MCU unit 404 from the signaling received, resolves the instruction obtaining OLT301 transmission。MCU unit 404 carries out corresponding operating according to the OLT301 instruction sent, specifically may include that the control laser emission element 401 of this optical module, laser pick-off unit 402, MAC protocol processing unit 403, PHY unit 405, or return corresponding data to OLT301, thus realize the OLT301 long-range control to this ONU optical module。
MCU chip in MCU unit 404 can be single-chip microcomputer, microprocessor, CPU, FPGA etc.。
Above-mentioned MAC protocol processing unit 403 can be respectively adopted discrete chip with MCU unit 404: protocol processes chip and MCU chip realize, it is possible to is integrated in a chip and realizes。
Additionally, ONU optical module 303 may also include memory element 406。MCU unit 404 is connected with memory element 406, and memory element 406 is in order to store parameter or instruction etc.。
The ONU optical module 303 of the above-mentioned IEEE802.3ahEPONMAC of being integrated with chip and numeral control function and distance communication can adopt the package casing of SFP optical module, and the schematic diagram of SFP package casing is as shown in Figure 7；It can be seen from figure 7 that the optical module being integrated with MAC function takes up room very little。Fig. 8 illustrates the external pin schematic diagram of the ONU optical module of the embodiment of the present invention。
In the optical module for optical network unit that the embodiment of the present invention provides, owing to being integrated with MAC protocol processing unit and PHY unit, it is possible to achieve the MAC protocol conversion of Ethernet and the data-transformation facility of LAN, thus optical module for optical network unitDirectly can be connected with ustomer premises access equipment, EPON need not arrange optical network unit system equipment again,Thus greatly reducing the cost of optical-fiber network, also save space shared by optical-fiber network。
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method can be by the hardware that program carrys out instruction relevant and completes, this program can be stored in a computer read/write memory medium, as: ROM/RAM, magnetic disc, CD etc.。
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention。
Claims (9)
1. an optical module for optical network unit, it is characterised in that including:
Laser pick-off unit, for receiving the downlink optical signal that the optical line terminal OLT in EPON sends, and exports the corresponding signal of telecommunication according to the downlink optical signal received；
Media interviews control MAC protocol processing unit, and for receiving the signal of telecommunication of described laser pick-off unit output, the data obtained after the signal of telecommunication received from described laser pick-off unit is carried out MAC protocol process export；
The data received from described MAC protocol processing unit for receiving the data of described MAC protocol processing unit output, and are encapsulated as after Frame by network cable to ustomer premises access equipment transmission by physical layer PHY unit；
MCU unit, for communicating with described MAC protocol processing unit。
2. optical module for optical network unit as claimed in claim 1, it is characterized in that, described MAC protocol processing unit is after carrying out MAC protocol process to downstream signal, if judging, identifying the signaling that downstream signal is described OLT transmission of reception, described signaling is then sent to described MCU unit, and described MCU unit resolves from the described signaling received and obtains the described OLT instruction sent。
3. optical module for optical network unit as claimed in claim 1, it is characterised in that described MCU unit is in order to realize the software upgrading of described MAC protocol processing unit。
4. optical module for optical network unit as claimed in claim 1, it is characterised in that described MCU unit is additionally operable to communicate with described PHY unit, in order to control the PHY chip in described PHY unit。
5. the optical module for optical network unit as described in as arbitrary in Claims 2 or 3, it is characterised in that described MCU unit is communicated with described MAC protocol processing unit by iic bus or other universal serial bus or parallel bus。
6. optical module for optical network unit as claimed in claim 4, it is characterised in that described MCU unit is by iic bus or SGMII interface or other universal serial bus or parallel bus and described PHY unit communication。
7. an optical module for optical network unit, it is characterised in that including: physical layer PHY unit, MAC protocol processing unit, laser emission element and MCU unit；
Described physical layer PHY unit, for receiving the Frame that ustomer premises access equipment sends, resolves described Frame, is sent to described MAC protocol processing unit by resolving the data obtained；
Described MAC protocol processing unit, carries out MAC protocol process for the data described PHY unit sent, and exports described laser emission element by processing the signal of telecommunication obtained；
Described laser emission element, for sending corresponding uplink optical signal according to the described signal of telecommunication to optical line terminal OLT；
Described MCU unit, for communicating with described MAC protocol processing unit。
8. optical module for optical network unit as claimed in claim 7, it is characterised in that described MCU unit is in order to realize the software upgrading of described MAC protocol processing unit。
9. optical module for optical network unit as claimed in claim 7, it is characterised in that described MCU unit is additionally operable to communicate with described PHY unit, in order to control the PHY chip in described PHY unit。
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| CN201610217922.7A CN105703836B (en) | 2012-10-09 | 2012-10-09 | Optical module for optical network unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610217922.7A CN105703836B (en) | 2012-10-09 | 2012-10-09 | Optical module for optical network unit |
| CN201210381150.2A CN102916746B (en) | 2012-10-09 | 2012-10-09 | EPON and optical module for optical network unit thereof |
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| CN201210381150.2A Division CN102916746B (en) | 2012-10-09 | 2012-10-09 | EPON and optical module for optical network unit thereof |
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| CN201210381150.2A Active CN102916746B (en) | 2012-10-09 | 2012-10-09 | EPON and optical module for optical network unit thereof |
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| CN109923802A (en) * | 2017-01-20 | 2019-06-21 | 华为技术有限公司 | A kind of method, optical access device and multi-plexing light accessing system handling data |
| 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 |
| CN117240355A (en) * | 2023-11-14 | 2023-12-15 | 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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| 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 |
| 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 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102916746A (en) | 2013-02-06 |
| CN105703836B (en) | 2017-12-19 |
| CN102916746B (en) | 2016-03-30 |
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Effective date of registration: 20180108 Address after: 529000 Tangxia Road, Pengjiang District, Guangdong, Hisense Avenue, No. 8 Patentee after: Guangdong Hisense Communications Co., Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: Hisense Broadband Multimedia Technology |