CN101729946A - Multi-user access unit - Google Patents
Multi-user access unit Download PDFInfo
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- CN101729946A CN101729946A CN200910223286A CN200910223286A CN101729946A CN 101729946 A CN101729946 A CN 101729946A CN 200910223286 A CN200910223286 A CN 200910223286A CN 200910223286 A CN200910223286 A CN 200910223286A CN 101729946 A CN101729946 A CN 101729946A
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Abstract
The invention discloses a multi-user access unit, which is integrated with a downlink optical receiver, an uplink optical emitter, a duplex filter, an EOC module and an EPON-ONU module, wherein the downlink optical receiver receives and demodulates a radio frequency signal and transmits the demodulated radio frequency signal to a high-frequency port of the duplex filter; the uplink optical emitter receives a returned radio frequency signal transmitted by a low-frequency port of the duplex filter and outputs uplink optical waves; the high-frequency port of the duplex filter receives the radio frequency signal demodulated by the downlink optical receiver, while the low-frequency port returns the radio frequency signal to the uplink optical emitter and simultaneously transmits the radio frequency signal to the EOC module; the EOC module is connected with the duplex filter to transmit the radio frequency signal and is connected with a radio frequency signal interface of a building to transmit the radio frequency signal to the building; and the EPON-ONU module transmits the radio frequency signal and transmits the received radio frequency signal to the EOC module. If all available resources are well configured, the multi-user access unit can support 64 users, is suitable for a conventional solution for HFC network deployment between optical fibers and the building, transmits data signals on coaxial cables so as to increase the Internet access bandwidth of the user, saves cost on engineering wiring and reduces engineering and fund investment.
Description
Technical field
The invention belongs to fiber optic communication field, relate to a kind of multi-user access unit, be used for realizing that Fiber to the home, reduce network rebuilding cost, service-user.
Background technology
In HFC (Hybrid Fiber-Coaxial, the hybrid network that optical fiber and coaxial cable combine) network, optical cable is more near the user, and the proportion of Optical Fiber Transmission is big more, i.e. the user of light station service is few more, and the performance of network is good more, but cost can improve.Particularly, along with the increase of outdoor light station quantity, the expense of installation and maintenance service also significantly increases.
Recent years, the cost of optical fiber cable and optical device declines to a great extent, and makes optical fiber more near the user.RFoG (RF over Glass, optical fiber radio frequency) is exactly the term of this new network configuration.The RFoG of standard be optical fiber to resident family, this just needs a large amount of RFoG optical network unit R_ONU (Optical Network Unit, optical network unit), this mode is fit to the exclusive commonplace developed country of living.
The internal structure of optical network unit R_ONU as shown in Figure 1, it comprises a WDM (Wavelength Division Multiplexing, wavelength division multiplexing), the light that light wave and the up wavelength of descending 1550nm is λ up separately.Descending optical receiver demodulates RF (RadioFrequency, radio frequency) signal and exports by duplexer filter.
Passback RF signal is sent into the passback optical sender by duplexer filter low frequency port, and its output wavelength is λ up.The RF level of registering one's residence generally is not higher than 20dBmV, and part passback RF signal is sent into testing circuit, is used for control switch passback optical sender.Only when return path signal surpassed certain threshold value, the passback optical sender was just opened, and this is the ONU characteristics of RFoG.
Although the cost of photoelectric device and optical fiber with 10 years before compared significantly and to have descended, but it is higher relatively with the national income level of relative China of network rebuilding cost of a R-ONU of each household use that Fiber to the home, and the such resident of developing country of China is stayed in multilayer or high-rise building more, the networking cost just increases again.Therefore, more and more be not suitable for the characteristics of China's national situation,,, become one and be badly in need of the technical problem that solves to the user with Fiber-To-The-Building near user and R_ONU based on the development of present hfc plant optical cable.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of multi-user access unit, particularly provide a kind of, EPON (Ethernet Passive Optical Network, Ethernet passive optical network) and EOC (Ethemet over Coax by DOCSIS (wire cable data, services transmission specification), the ether data are transmitted by coaxial cable) equipment sends data-signal into each family, with the light station, EPON, EOC webmaster gather and form high integration together, modularization, the product of flexible configuration.
In order to achieve the above object, a kind of multi-user access unit provided by the invention is characterized in that, and is integrated:
Descending optical receiver, duplexer filter high frequency port is delivered in received RF signal and demodulation;
Up optical sender receives the passback radiofrequency signal of being sent by the oral instructions of duplexer filter low frequency end, and exports up light wave;
Duplexer filter, its high frequency port receives the radiofrequency signal of described descending optical receiver demodulation, and its low frequency port is back to described up optical sender with the radiofrequency signal that the high frequency port receives, and the radiofrequency signal that the high frequency port is received is sent to the EOC module simultaneously;
The EOC module links to each other with described duplexer filter, transmitting radio frequency signal, and link to each other with a building radiofrequency signal interface, radiofrequency signal is delivered to Lou Dong;
The EPON-ONU module communicates by described EOC module and user's computer equipment.
Wherein, also be integrated with the MAU-SNMP module in the described unit, be used for described EPON-ONU module, perhaps EOC module and whole multi-user access unit are monitored.
Wherein, also be integrated with the WDM module in the described unit, link to each other with described descending optical receiver, described up optical sender and described EPON-ONU module, transmitting radio frequency signal is realized the shared optical fiber of multichannel light wave transmissions.
Wherein, described EOC module can select for use the MoCA standard of high frequency or the PLC of low frequency to adapt to the network design demand according to user's request.
Wherein, described descending optical receiver receives the optical wavelength scope between 1310nm～1550nm.
Wherein, described descending optical receiver luminous power under the AGC mode of operation from-5dBm to+output level was up to 44dBmV when 3dBm changed.
Technique scheme has following advantage:
1, MAU main feature provided by the invention has: high performance RF solution is provided; Meet the IEEE802.3ah standard, real " Triple Play " business can be provided, maximum 64 users share; CATV full range band transmission frequency from 45MHZ to 1000MHZ; Inverse bandwidth covers 5 to 200MHZ, and the user can select the 4.5MHZ pilot signal to be used for network management monitoring; Can transmit NTSC, PAL, DVB-C, the TV signal of DVB-T standard; Fixed attenuator easy to plug is used for regulating radio frequency output; Be easy to installation and maintenance; Support that on same optical-fiber network multiple business inserts; Carry out network management and monitoring by 802.3ah OAM agreement and PBN NMS3 software, comprise bandwidth and condition monitoring; Support two kinds of POC modulation systems, modulating frequency is respectively 2～30MHZ and 900MHZ～1.2GHZ, and the application layer data bandwidth is respectively 50Mbps and 130Mbps.
2, the MAU of full configuration can be with 64 users, the HFC networking solution that is suitable for present Fiber-To-The-Building, form EPON-ONU and EOC in MAU inside, solved the separation of EPON-ONU, optical receiver and EOC, overcome the in disorder shortcoming of the more cabling of on-the-spot casing.Coaxial cable has been got well in present most sub-district cloth, the design of MAU can solve the fiber-to-the-home problem of last 1km, at the transmission over coaxial cable data-signal, increase user's bandwidth of surfing the Net, saving fund in the engineering wiring, reduce engineering input and fund input, be suitable for China's national conditions of developing country like this.
Description of drawings
Fig. 1 is the internal structure schematic diagram of optical network unit R_ONU in the background technology of the present invention;
Fig. 2 is a multi-user access unit MAU structural representation among the present invention;
Fig. 3 is a multi-user access unit MAU contour structures pictorial diagram among the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
Multi-user access unit MAU of the present invention can provide multi-channel television broadcasting, the EPON cable data platform of registering one's residence simultaneously, also can provide DOCSIS to insert.
The structural representation of MAU as shown in Figure 2.The essential part of MAU comprises the descending optical receiver of 1310nm/1550nm, and up optical sender is also recalled the biography optical sender, EPON-ONU module, EOC module.1310nm/1550nm optical receiver bandwidth is 1000MHz, has high-output power, the EOC module can adopt MoCA (the Multimedia over Coax Alliance of high frequency according to user's request, multimedia over Coax Alliance) standard, perhaps the PLC of low frequency (Power Line Communication, i.e. power line communication) standard adapts to the demand of heterogeneous networks design.The EOC module is while TV transmission and bi-directional data signal on coaxial cable, realize multi-channel television broadcast platform and the shared optical fiber of data platform, utilize existing wiring (a building inner cable or category-5 cable wiring) to realize the transmission of TV, image and voice signal.MAU-SNMP (Simple Network Management Protocol, Simple Network Management Protocol) webmaster module both can be monitored also and can carry out network management monitoring to EOC module and whole media access unit the EPON-ONU module.The backlight transmitter also can be realized HFC is partly monitored.Descending optical receiver by MAU-SNMP webmaster module luminous power under the AGC mode of operation from-5dBm to+when 3dBm changes output level up to 44dBmV.
Adopt modular construction when the MAU design implementation, each module all can be matched, and is divided into:
MAU-RF (essential)----MAU main part
MAU-RF------------MAU optical receiver module
MAU-SNMP--------MAU webmaster module
The MAU-EPON--------EPON-ONU module
The MAU-POC-----------EOC module,
According to user's needs, MAU can also increase WDM simultaneously, realizes that multi-channel television broadcast platform and data platform are respectively with an optical fiber.
In the present embodiment, the leading indicator of MAU product has:
The RF forward receives: 1550nm ± 5nm, (1310nm)+3--5dBm
RF returns transmission: 1310nm, 1590nm (1610nm) ± 10nm, 0,1,3dBm
Data Receiving: 1490nm ± 10nm
Data send: 1310nm ± 20nm
Data Receiving sensitivity:＜-24dBm@1490nm
Data sending power :-1～4dBm@1310nm
Linear speed: 1.25Gbps duplex
All right built-in MoCA among the MAU, various EOC local side apparatus such as PLC are to be fit to user's heterogeneous networks design requirement.
The network management function of SNMP module can be monitored in real time to the operating state of MAU.
HFC and EOC equipment also can be by the EPON Network Management Equipment management of standard.
Rx:5-30,42,65MHz can be used for up radio frequency transmission; 45,54,65-1000MHz can be used for the downlink radio frequency transmission;
Rx single port output level, 44dBmV (twoport 40dBmV);
AGC control range :+3-5dBm;
Complete machine chain index: (measuring condition: 4%OMI ,-5dBm input, 44dBmV/ch, 77ch NTSC, optical receiver slope 10dB)
CNR：＞48dB*
CSO：＜-63dBc
CTB：＜-65dBc
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (6)
1. a multi-user access unit is characterized in that, and is integrated:
Descending optical receiver, duplexer filter high frequency port is delivered in received RF signal and demodulation;
Up optical sender receives the passback radiofrequency signal of being sent by the oral instructions of duplexer filter low frequency end, and exports up light wave;
Duplexer filter, its high frequency port receives the radiofrequency signal of described descending optical receiver demodulation, and its low frequency port is back to described up optical sender with the radiofrequency signal that the high frequency port receives, and the radiofrequency signal that the high frequency port is received is sent to the EOC module simultaneously;
The EOC module links to each other with described duplexer filter, transmitting radio frequency signal, and link to each other with a building radiofrequency signal interface, radiofrequency signal is delivered to Lou Dong;
The EPON-ONU module communicates by described EOC module and user's computer equipment.
2. multi-user access unit as claimed in claim 1 is characterized in that, also is integrated with the MAU-SNMP module in the described unit, is used for described EPON-ONU module, and perhaps EOC module and whole multi-user access unit are monitored.
3. multi-user access unit as claimed in claim 1, it is characterized in that, also be integrated with the WDM module in the described unit, link to each other with described descending optical receiver, described up optical sender and described EPON-ONU module, transmitting radio frequency signal is realized the shared optical fiber of multichannel light wave transmissions.
4. multi-user access unit as claimed in claim 1 or 2 is characterized in that, described EOC module can select for use the MoCA standard of high frequency or the PLC of low frequency to adapt to the network design demand according to user's request.
5. as claim 1 or 3 described multi-user access units, it is characterized in that described descending optical receiver receives the optical wavelength scope between 1310nm～1550nm.
6. as claim 1 or 3 described multi-user access units, it is characterized in that, described descending optical receiver luminous power under the AGC mode of operation from-5dBm to+output level was up to 44dBmV when 3dBm changed.
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| CN200910223286A CN101729946A (en) | 2009-11-23 | 2009-11-23 | Multi-user access unit |
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| CN200910223286A CN101729946A (en) | 2009-11-23 | 2009-11-23 | Multi-user access unit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944955A (en) * | 2010-09-20 | 2011-01-12 | 青岛有线电视网络中心 | Converged network transmission system carrying data and video signals |
| WO2011144075A2 (en) * | 2011-05-25 | 2011-11-24 | 华为技术有限公司 | Internet data transmission apparatus, transmission line and ethernet over coaxial-cable device |
| CN103595887A (en) * | 2013-11-12 | 2014-02-19 | 宁波环球广电科技有限公司 | Optical cable modem Node device with relay function |
| CN104363388A (en) * | 2014-09-29 | 2015-02-18 | 丹东华欣电子科技有限公司 | EPON+EOC local-side double-band mixing device |
| CN106027149A (en) * | 2016-07-21 | 2016-10-12 | 长春光客科技有限公司 | Multi-user visible light communication device and method adopting a plurality of rotatable top ends |
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| CN101345589A (en) * | 2008-08-25 | 2009-01-14 | 杭州华三通信技术有限公司 | Apparatus and method for integrating passive optical network and coaxial Ethernet component |
| CN101467366A (en) * | 2007-04-27 | 2009-06-24 | 华为技术有限公司 | Passive optical network with partially-tuned lasers |
| CN101478504A (en) * | 2008-12-04 | 2009-07-08 | 上海大学 | Multimedia house gateway for implementing conversion between signals of optical cable and coaxial electric cable |
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2009
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101467366A (en) * | 2007-04-27 | 2009-06-24 | 华为技术有限公司 | Passive optical network with partially-tuned lasers |
| CN101345589A (en) * | 2008-08-25 | 2009-01-14 | 杭州华三通信技术有限公司 | Apparatus and method for integrating passive optical network and coaxial Ethernet component |
| CN101478504A (en) * | 2008-12-04 | 2009-07-08 | 上海大学 | Multimedia house gateway for implementing conversion between signals of optical cable and coaxial electric cable |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944955A (en) * | 2010-09-20 | 2011-01-12 | 青岛有线电视网络中心 | Converged network transmission system carrying data and video signals |
| WO2011144075A2 (en) * | 2011-05-25 | 2011-11-24 | 华为技术有限公司 | Internet data transmission apparatus, transmission line and ethernet over coaxial-cable device |
| WO2011144075A3 (en) * | 2011-05-25 | 2012-04-26 | 华为技术有限公司 | Internet data transmission apparatus, transmission line and ethernet over coaxial-cable device |
| CN103595887A (en) * | 2013-11-12 | 2014-02-19 | 宁波环球广电科技有限公司 | Optical cable modem Node device with relay function |
| CN103595887B (en) * | 2013-11-12 | 2016-01-27 | 宁波环球广电科技有限公司 | There is the optical cable modem Node device of relay function |
| CN104363388A (en) * | 2014-09-29 | 2015-02-18 | 丹东华欣电子科技有限公司 | EPON+EOC local-side double-band mixing device |
| CN104363388B (en) * | 2014-09-29 | 2017-07-25 | 丹东华旭电子技术有限公司 | EPON+EOC local side double frequency mixing arrangements |
| CN106027149A (en) * | 2016-07-21 | 2016-10-12 | 长春光客科技有限公司 | Multi-user visible light communication device and method adopting a plurality of rotatable top ends |
| CN106027149B (en) * | 2016-07-21 | 2018-09-18 | 长春光客科技有限公司 | Using multi-user's visible light communication device and method at multiple rotatable top set ends |
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Application publication date: 20100609 |