CN1708126A - Network management method for optical node of optical fiber coaxle cable mixed network - Google Patents
Network management method for optical node of optical fiber coaxle cable mixed network Download PDFInfo
- Publication number
- CN1708126A CN1708126A CN 200410049304 CN200410049304A CN1708126A CN 1708126 A CN1708126 A CN 1708126A CN 200410049304 CN200410049304 CN 200410049304 CN 200410049304 A CN200410049304 A CN 200410049304A CN 1708126 A CN1708126 A CN 1708126A
- Authority
- CN
- China
- Prior art keywords
- optical node
- network management
- radio modem
- network
- server
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Optical Communication System (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The present invention provides the light node network managing method for mixed network of optical fiber and coaxial cable. The method includes setting RF modem in each of the light nodes in the mixed network; allocating each of the RF modem with address code the same as that of the corresponding light node; accessing the RF modems into mixed network; sending the address code of the RF modems as the header of corresponding light node data to the server of the mixed network; and receiving the command from the server with the RF modem and transmitting the command to the corresponding light node. The present invention makes light node communicate directly with bi-directional mixed network of optical fiber and coaxial cable in RF environment so as to realize the network management of light node.
Description
Technical field
The present invention relates to the information transferring method in the Hybrid Fiber Coaxial (HFC, i.e. Hybrid Fiber Coaxial Cable), particularly a kind of network management of optical node of two-way cable TV network.
Background technology
HFC is a kind of connecting system flexibly, it also is a kind of good transmission system, its copper cable and optical cable/optical fiber are arranged in pairs or groups, the characteristic that two kinds of physical medium have is provided simultaneously and supports analog-and digital-transmission simultaneously, thereby can support existing whole transmission technology, comprising ATM, frame relay, SONET and SMDS (the multi-megabit data, services of switch type).Because HFC structure and existing cable TV network structural similarity make the above-mentioned characteristic of HFC at first be applied in cable TV (CATV) system.
Now, the trend that develops into the cable TV development of two-way mutual HFC TV network is characterized in: in hfc plant, the optical cable that adopts optical fiber, star or annular from the front end to the optical node adopts coaxial cable to register one's residence after arriving user's service area.So-called optical node is exactly the transfer point of photosignal.Along with improving constantly of hfc plant function expansion and specification requirement, optical node no longer is the optical receiver that simply downlink optical signal is converted to radiofrequency signal in the simulation HFC transmission network, but develop towards broadband, two-wayization and multifunction direction day by day, promptly comprehensive descending opto-electronic conversion and up electric light conversion etc. are multi-functional in one.As seen, optical node is most important in the transmission of the data of two-way mutual HFC TV network.Yet, management to the cable optical node does not at present form standard, the network management of cable optical node in network mainly is by carrying on FSK (that is: the frequency shift keying) modulator of cable TV station and other producer's equipment, carry out status poll and demonstration passively, because each producer does not form a unified standard, as in a HFC net, using how tame product, Stateful Inspection itself just is difficult to realize, can not realize Long-distance Control, application on incompatibility broadband IP (Internet Protocol) or the HFC Access Network, so far, domestic none complete cable TV optical node network management system still.And because user's optical node number is huge, and each optical node is independently, adopts that said method is real difficultly to provide effective network management to optical node.
Summary of the invention
Purpose of the present invention just provides a kind of method that the optical node of hfc plant is realized network management, real-time huge, the state of each optical node independently separately of monitor numbers, with the operate as normal of each optical node of guaranteeing hfc plant, and then improve the reliability of the two-way mutual HFC TV network that adopts hfc plant.
For realizing purpose of the present invention, concrete technical scheme of the present invention is achieved in that
A kind of network management of optical node of Hybrid Fiber Coaxial may further comprise the steps:
Step S1: in each optical node in described Hybrid Fiber Coaxial radio modem is set;
Step S2: distribute to each described radio modem and its optical node corresponding address sign indicating number;
Step S3: described radio modem is inserted described Hybrid Fiber Coaxial;
Step S4: described radio modem sends to its address code the server of described Hybrid Fiber Coaxial as the header of the data of its corresponding optical node;
Step S5: described radio modem receives the order of described server and passes to its corresponding optical node.
Wherein, described step S4 so realizes: described radio modem monitors downlink channel is to obtain spendable uplink channel information; And when every data of its corresponding optical node of modulation, the address code that adds oneself is as header; Pass through the up channel that obtained then, the data of modulation gained are sent to cable router in the headend room, the latter receives described modulating data, is sent to described server after demodulation, framing, route.
Wherein, described step S5 so realizes: described radio modem receives the order of described server; And be the order of passing to its corresponding optical node by the order that its address code is discerned described server; Last described optical node is carried out the order of described server to it by its condition monitoring interface.
Wherein, described Hybrid Fiber Coaxial is as cable television network, present two-way HFC net can provide high-speed data service to the user by cable modem, video, data-signal are adopted MCNS DOCSIS (Multimedia Cable Network System Partners ' Data OverCable System Interface Specification) consensus standard, and the interface of described radio modem adopts the docsis standard of MCNS.
Wherein, the data of described optical node comprise the operating state supervisory signal of optical node; The order that the optical node of described step S5 is carried out server by its condition monitoring interface comprises: the modification of the state parameter of optical node, the switch of each operational module, switching, backup, noise attentuation control; Described network management is applicable to broadband the Internet protocol; Described radio modem is provided with spare interface, in order to the amplifier of connection with described optical node adjacency.
As seen, in the present invention's each optical node in hfc plant a radio modem has been installed, this modulator-demodulator has the interface of supporting the DOCSIS agreement, and this radio modem has a fixing address code, and its address code is unique sign of different optical nodes in the whole HFC net of identification.
This radio modem at first monitors downlink channel uses the up channel of appointment and the cable router communication in the headend room then to obtain spendable uplink channel information.The rf modulations demodulation is when every data of light modulated node, and the address code that adds oneself is given the cable router in the headend room as header, arrives home server after the demodulation of cable router, framing, route.And after the order that home server sends goes downwards to radio modem, also be through after the address code identification corresponding optical node being passed in order, the state of optical node being realized Long-distance Control.So just realize communicating by letter between optical node and the hfc plant.In addition, spare interface on the radio modem, the various parameters of equipment such as cable uninterrupted power supply, amplifier can be communicated by radio modem and two-way HFC net, thereby realization is to the network management of equipment such as cable uninterrupted power supply, amplifier.
By the network management to optical node in the two-way HFC net provided by the invention, can be in real time to optical node monitoring and control, locate the position and the failure cause of unusual optical node device fast, reducing signal index worsens, vision signal and data communication break period are for engineering first-aid repair is offered help.The user can be in the real-time running status of optical node everywhere in the whole hfc plant of monitoring of control centre, in time switch, handle various situations, guarantee the reliability of network, do not need to build in addition a cover optical node network management system yet, thereby saved investment, further improve the transmission quality and the performance of two-way hfc plant, adapted to the multi-functional exploitation of hfc plant better.
Description of drawings
Fig. 1 is the access schematic diagram of optical node in hfc plant;
Fig. 2 is the flow chart of the network management of optical node in the hfc plant of the present invention;
Fig. 3 is the cable router of front end and the part hierarchical relational of radio modem;
Fig. 4 is the structural principle block diagram of radio modem.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
At present, two-way HFC net can also provide high-speed data service to the user by cable modem, even telephone service is provided except the broadcasting audio/video program.The front end nucleus equipment that high-speed data and telephone service wherein are provided is the cable router, and the cable router is mainly finished the modulation of downstream signal, the demodulation of upward signal, and framing, mac-layer protocol, control and treatment have routing function in addition concurrently.Adopt MCNS DOCSIS (Multimedia Cable NetworkSystem Partners ' Dara Over Cable System Interface Specification) interface standard between it and cable modem.
Fig. 1 is the access schematic diagram of optical node in hfc plant.The downstream signal of video source and cable router is distributed to forward optical sender group after mixing, and after the forward optical sender is converted to light signal, is transmitted through the fiber to optical node.Optical node is an equipment of finishing the conversion of the light signal and the RF signal of telecommunication, and it is converted to rf signal with descending light signal, and simultaneously its upward signal of uploading through coaxial cable distribution net of also user being sent converts light signal to.Downstream signal converts radiofrequency signal to after coaxial cable distribution net transfers to the user through optical node, because decay is bigger in the radio signal transmission process, generally can seal in radio frequency amplifier.At user side, the user can teleview, by connecting computer and phone behind the cable modem.
Similar with downstream signal, the upward signal of user side passes through to arrive the cable router behind radio frequency amplifier, optical node, passback optical receiver, the separator, is handled by the cable router, arrives Internet or home server after the route.Wherein, optical node and radio frequency amplifier are positioned at the field, belong to active equipment, need externally fed.For example, generally just be placed with the cable uninterrupted power supply near the optical node.Carrier state monitor-interface in optical node is general can be used for carrying out switch, switching, backup, the noise attentuation control of each operational module and the operating state supervisory signal that optical node itself is provided.In order to realize the network management of optical node, in cable television system, generally the mode with rf modulations realizes transmission, and hfc plant provides broadband services can adopt two kinds of transmission means: ATM (Asynchronous Transfer Mode Asynchronous TransferMode) transmission and IP (Internet Protocol Internet Protocol) transmission, corresponding two class standards: IEEE802.14 and the MCNS of occurring, IEEE802.14 supports the ATM transmission, and MCNS supports the IP transmission.
The part that brackets referring to Fig. 1 bottom with dashed lines, in " webmaster embodiment " of the present invention, to optical node and amplifier feed, the radio modem that bundles with optical node also passes through this feed coaxial cable transmitting radio frequency signal to the cable uninterrupted power supply by coaxial cable.The rf modulations demodulation is when every data of light modulated node, and the address code that adds oneself is as header; Equally, downlink data also is after discerning through address code data to be passed to corresponding optical node, thereby finishes the optical node network management behind radio modem.Radio modem adopts DOCSIS agreement and the two-way HFC net of MCNS to communicate.In addition, in Fig. 1, radio modem links to each other by a dotted line with cable uninterrupted power supply, radio frequency amplifier, if expression communicates the network management information of equipment such as cable uninterrupted power supply, radio frequency amplifier by radio modem and bidirectional optical fiber coaxial cable hybrid network, also can realize webmaster to equipment such as cable uninterrupted power supply, radio frequency amplifiers.
Referring to Fig. 2, the flow chart for the network management of optical node in the hfc plant of the present invention may further comprise the steps:
Step S1: in each optical node in described Hybrid Fiber Coaxial radio modem is set;
Step S2: distribute to each described radio modem and its optical node corresponding address sign indicating number;
Step S3: described radio modem is inserted described Hybrid Fiber Coaxial;
Step S4: described radio modem sends to the server of described Hybrid Fiber Coaxial with its address code as the header of the data of its corresponding optical node, and it specifically can be realized like this: described radio modem monitors downlink channel is to obtain spendable uplink channel information; And when modulating every data of its corresponding optical node, the address code that adds oneself is as header; Pass through the up channel that obtained then, the data of modulation gained are sent to cable router in the headend room, the latter receives described modulating data, is sent to described server after demodulation, framing, route.
Step S5: the order of the described server that described radio modem receives is also passed to its corresponding optical node, and this step specifically can realize like this: described radio modem receives the order of described server; And be the order of passing to its corresponding optical node by the order that its address code is discerned described server; Last described optical node is carried out the order of described server to it by its condition monitoring interface.
Referring to Fig. 3, radio modem of the present invention comprises duplexer filter, modulator, demodulator, interleaving and de-interleaving, FEC (forward error correction), mac processor, data framing, digital coding and processor system (comprising CPU and memory etc.), in addition, also comprise and cable optical node interface section.During operate as normal, CPU partly obtains power information from power interface, if desired with data upload, then advanced line data coding, after MAC layer processor confirmed to send, give after lower floor finishes FEC coding (transmit when makeing mistakes in the layer and can correct some mistake), (error correcting capability that can strengthen FEC under the burst noise greatly) processing that interweaves, pass through modulator, export behind the duplexer filter.Signal on the cable is isolated downstream signal after passing through duplexer filter, and is corresponding, and pass through demodulator, deinterleave, fec decoder, MAC layer processor arrives CPU behind the data framing, after handling by power interface then, pass to power unit.
Referring to Fig. 4, for realizing among the two-way HFC power supply being realized the purpose of network management, in optical node, adopt the radio modem of band fixed address sign indicating number, the part hierarchy of radio modem and front end (referring to the cable router) is corresponding one by one, as up physical layer, down physical layer, MAC layer, LLC, ATM etc.Wherein, front end comprises following major function:
1. descending RF cable connector port is supported the quadrature amplitude modulation of 64-QAM or 256-QAM.
2. a up RF cable connector port is supported the strong quadrature amplitude modulation of controlling (QPSK) modulation or 16-QAM of quadrature phase shift.
3. cable dielectric access control (MAC) unit, transmission divides frame and encryption to downstream signal for RF, and signal is sent to downstream physical layer (PHY).Physical layer next signal in upstream is carried out signal to be divided frame and encrypts upset.
Down physical layer unit: produce the intermediate frequency output signal, and intermediate-freuqncy signal is sent to the RF that is installed in the down going channel connects parallel operation.
The upstream physical layer unit: it receives upward signal, and signal is sent to cable MAC deletes branch frame and encryption format.
Spectrum manager: be used for monitoring the not noise of the up channel of usefulness, as using in the channel at certain, signal to noise ratio reaches unacceptable level, and spectrum manager will be specified a new up channel to the radio modem that uses this channel.
By the optical node network management in the HFC net, can in time switch, handle various situations in the central machine room running status of optical node everywhere in the whole hfc plant of monitoring in real time, ensure the reliability service of network.
Claims (8)
1. the network management of the optical node of a Hybrid Fiber Coaxial may further comprise the steps:
Step S1: in each optical node in described Hybrid Fiber Coaxial radio modem is set;
Step S2: distribute to each described radio modem and its optical node corresponding address sign indicating number;
Step S3: described radio modem is inserted described Hybrid Fiber Coaxial;
Step S4: described radio modem sends to its address code the server of described Hybrid Fiber Coaxial as the header of the data of its corresponding optical node;
Step S5: described radio modem receives the order of described server and passes to its corresponding optical node.
2. the network management of optical node according to claim 1 is characterized in that, described step S4 so realizes:
Described radio modem monitors downlink channel is to obtain spendable uplink channel information; And when every data of its corresponding optical node of modulation, the address code that adds oneself is as header; Pass through the up channel that obtained then, the data of modulation gained are sent to cable router in the headend room, the latter receives described modulating data, is sent to described server after demodulation, framing, route.
3. the network management of optical node according to claim 1 is characterized in that, described step S5 so realizes:
Described radio modem receives the order of described server; And be the order of passing to its corresponding optical node by the order that its address code is discerned described server; Last described optical node is carried out the order of described server to it by its condition monitoring interface.
4. the network management of optical node according to claim 1 is characterized in that, described Hybrid Fiber Coaxial is a cable television network, and the interface of described radio modem and cable television network adopts the docsis standard of MCNS.
5. the network management of optical node according to claim 1 is characterized in that, the data of described optical node comprise the operating state supervisory signal of optical node.
6. the network management of optical node according to claim 3, it is characterized in that, the order that the optical node of described step S5 is carried out server by its condition monitoring interface comprises: the modification of the state parameter of optical node, the switch of each operational module, switching, backup, noise attentuation control.
7. the network management of optical node according to claim 1 is characterized in that, described network management is applicable to broadband the Internet protocol.
8. the network management of optical node according to claim 1 is characterized in that, described radio modem is provided with spare interface, in order to the amplifier of connection with described optical node adjacency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410049304 CN1708126A (en) | 2004-06-09 | 2004-06-09 | Network management method for optical node of optical fiber coaxle cable mixed network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410049304 CN1708126A (en) | 2004-06-09 | 2004-06-09 | Network management method for optical node of optical fiber coaxle cable mixed network |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1708126A true CN1708126A (en) | 2005-12-14 |
Family
ID=35581737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410049304 Pending CN1708126A (en) | 2004-06-09 | 2004-06-09 | Network management method for optical node of optical fiber coaxle cable mixed network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1708126A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263675A (en) * | 2011-07-01 | 2011-11-30 | 广州杰赛科技股份有限公司 | Monitoring device and method of HFC (hybrid fiber coaxial cable) network |
| CN102970195A (en) * | 2012-11-02 | 2013-03-13 | 复旦大学 | Data transmission system and method for access network (AN) based on Ethernet over coax (EOC) |
| CN105530132A (en) * | 2015-12-17 | 2016-04-27 | 上海未来宽带技术股份有限公司 | Management system and method of CATV optical receiving module on CDOCSIS platform |
| CN106254964A (en) * | 2016-08-22 | 2016-12-21 | 安徽瑞宏信息科技有限公司 | Television network monitoring system |
-
2004
- 2004-06-09 CN CN 200410049304 patent/CN1708126A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263675A (en) * | 2011-07-01 | 2011-11-30 | 广州杰赛科技股份有限公司 | Monitoring device and method of HFC (hybrid fiber coaxial cable) network |
| CN102263675B (en) * | 2011-07-01 | 2013-07-17 | 广州杰赛科技股份有限公司 | Monitoring device and method of HFC (hybrid fiber coaxial cable) network |
| CN102970195A (en) * | 2012-11-02 | 2013-03-13 | 复旦大学 | Data transmission system and method for access network (AN) based on Ethernet over coax (EOC) |
| CN105530132A (en) * | 2015-12-17 | 2016-04-27 | 上海未来宽带技术股份有限公司 | Management system and method of CATV optical receiving module on CDOCSIS platform |
| CN106254964A (en) * | 2016-08-22 | 2016-12-21 | 安徽瑞宏信息科技有限公司 | Television network monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1197323C (en) | Application operation in bi-directional communication system compatible with internet | |
| EP2371092B1 (en) | Apparatus and methods for moving cable modems between upstream channels | |
| EP1807951B1 (en) | Hierarchical flow-level multi-channel communication | |
| US7149223B2 (en) | Enhanced fiber nodes with CMTS capability | |
| US7548558B2 (en) | Cable modem termination system with flexible addition of single upstreams or downstreams | |
| US6011548A (en) | System for integrating satellite boardband data distributed over a cable TV network with legacy corporate local area networks | |
| EP1436927B1 (en) | Multi-carrier frequency-division multiplexing (fdm) architecture for high speed digital service | |
| US7023871B2 (en) | Wideband DOCSIS on catv systems using port-trunking | |
| US8621539B1 (en) | Physical layer transmitter for use in a broadband local area network | |
| US7039939B1 (en) | Method and apparatus for creating virtual upstream channels for enhanced lookahead channel parameter testing | |
| CN101305524B (en) | Method and apparatus for power line communication | |
| CA2380344A1 (en) | Hybrid cable/wireless communications system | |
| CN101030907A (en) | HFC network wideband access system based on MoCA technology | |
| CN101155036A (en) | Head end equipment of wired access network system | |
| WO2012019317A1 (en) | Virtual network and three networks into one | |
| US20020178236A1 (en) | Internet broadcast system | |
| CN103856295A (en) | Transmitter and transmitting method | |
| CN1131603C (en) | Wiring access method of broadband multimedia services | |
| US7801101B2 (en) | Apparatus and method for compensating forward link rain attenuation based on adaptive transmission scheme for interactive satellite transmission system | |
| CN1708126A (en) | Network management method for optical node of optical fiber coaxle cable mixed network | |
| US20060117361A1 (en) | Data communications system using CATV network with wireless return path | |
| Cisco | Chapter 5: Configuring Spectrum Management | |
| CN1154360C (en) | Network management method for power supply in cable TV network | |
| EP2124387B1 (en) | Distribution of broadband multimedia streams in WiFi connections | |
| US7656877B1 (en) | Apparatus and methods for sniffing data in a cable head end |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |