CN2529474Y - Device for monitoring and managing two-way wired TV. network equipment - Google Patents
Device for monitoring and managing two-way wired TV. network equipment Download PDFInfo
- Publication number
- CN2529474Y CN2529474Y CN02219521U CN02219521U CN2529474Y CN 2529474 Y CN2529474 Y CN 2529474Y CN 02219521 U CN02219521 U CN 02219521U CN 02219521 U CN02219521 U CN 02219521U CN 2529474 Y CN2529474 Y CN 2529474Y
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- network
- demodulator
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- modulator
- microcontroller
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Abstract
The utility model discloses a device for monitoring and managing two-way wired TV network equipment, in particular to a wired TV optical fiber or coaxial cable combined online transmitting and controlling signal, which is used for monitoring and controlling the device of a successive power supply on the wired TV network. The utility model forms a front terminal controlling center by a front terminal server through connecting an RS485 interface and a front terminal modulator and demodulator. The utility model controls the successive power supply of an optical node through the combined network transmitted signal data of two-way optical fiber or coaxial cable. Therefore, the utility model achieves successive, real-time and long distance monitoring and management of the UPS power supply of the two-way wired TV network device.
Description
Technical field
The utility model relates to a kind of device that is used for Wired TV network equipment is carried out control and management, be specifically related to a kind of on cable TV optical fiber/coaxial cable hybrid network transmission and control signal, be used to monitor and control the device of uninterrupted power supply on the cable TV network.
Background technology
Cable TV wide-band bidirectional comprehensive service function net is the basic framework of following information superhighway.At present, the OUBN transmission system is to be the optical cable/coaxial cable hybrid network (HFC) of main line with the optical cable, its transmission mode be from hub head end and sub-headend by star radiation mode laying optical cable to each distribution node, carry out opto-electronic conversion at node.
Compare with original one-way CATV transmission network, because one-way CATV transmission network function singleness, equipment is simple relatively, the requirement of no network management aspect.Along with the development of two-way cable TV network network, the scope of network is increasing, and function is more and more, and technology becomes increasingly complex, and the importance of network management also displays day by day, particularly to the monitoring management of the network equipment.
The network power supply system is one of most important equipment in the network equipment, because all network equipments all will rely on it that power supply is provided, optical node ups power particularly, safe and reliable operation to cable TV network is most important, so, selecting its equipment as the network monitoring management, is the effective means of guaranteeing the normal operation of cable TV network.
In the prior art, can pass through technology such as RS485 interface, Ethernet, wireless transmission, infrared transmission and telephone network to the monitoring of the ups power on the cable TV network and realize.But wireless and infrared transmission can only be carried out on-site supervision, can't realize remote operation; Again because the ups power on the cable TV network has a very wide distribution, the zone disperses, it is a metropolitan area network, its coverage has surpassed the maximum segment length in RS485 interface and the ethernet technology standard, as adopt technique scheme to come the ups power on the cable TV network is carried out real-time control management, need arrange net separately, can not make full use of existing cable TV network resource; In the one-way CATV network network, can dial by telephone line modem and return data, the phone passback can be applied to interactive TV systems such as video request program, but is not suitable for the monitoring in real time continuously in 24 hours of Wired TV network equipments such as ups power.Therefore, being used for that at present two-way cable TV network network ups power is realized that the device of real-time remote monitoring management yet there are no comes into operation.
Summary of the invention
Goal of the invention of the present utility model provides a kind of by optical fiber/coaxial cable hybrid network transmission data, is used for the uninterrupted power supply of two-way cable TV network network is realized device long-range, continuous, Real-time Monitor Management.
For achieving the above object, the technical solution adopted in the utility model is: pass through bidirectional optical fiber/coaxial cable hybrid network (HFC) by the front-end control center, through the node interface unit, control the optical node uninterrupted power supply and constitute a kind of device to the management of two-way cable TV network network monitoring of tools, the front-end control center is connected to form by RS485 interface and front end modulator-demodulator by front-end server; Described front end modulator-demodulator, the RS232/RS485 transducer of being isolated by band photoelectricity is connected through the PORT COM of RS485 interface with the front end microcontroller, the FPDP of front end microcontroller is connected with the rf data modulator-demodulator, the radiofrequency signal termination bidirectional optical fiber/coaxial cable hybrid network of rf data modulator-demodulator, the control port of front end microcontroller is connected with the transmitting-receiving Enable Pin of rf data modulator-demodulator; Described node interface unit, radiofrequency signal by bidirectional optical fiber/coaxial cable hybrid network transmission, after the rf data modem processes, be connected by the FPDP of FPDP with the node microcontroller, the control port of node microcontroller is connected with rf data modulator-demodulator transmitting-receiving enable port, and the another port connects the control port of optical node uninterrupted power supply.
Above-mentioned described rf data modulator-demodulator, data-signal by front end microcontroller or node microcontroller connects the modulator input, output connects the input of duplexer behind filter, amplifier, the output end signal of duplexer inserts bidirectional optical fiber/coaxial cable hybrid network, the radiofrequency signal output output radiofrequency signal of duplexer, through amplifier, frequency mixer, filter, demodulator, the output digital signal inserts front end microcontroller or node microcontroller.
Above-mentioned described node interface unit places in the optical node uninterrupted power supply.
Modulator, frequency mixer in the above-mentioned described rf data modulator-demodulator, its oscillator signal is produced by phase-locked loop circuit.
The utility model operation principle is: UPS monitoring or control command by front-end server sends are sent to the front end modulator-demodulator through the RS485 communication interface; The front end microcontroller is checked the data legitimacy according to Data Transport Protocol, if data are legal, this serial signal is sent to the radio-frequency modulator module.Answer signal from UPS, enter the front end modulator-demodulator through cable television network, revert to data-signal, check the data legitimacy by the front end microcontroller by radio-frequency (RF) demodulator, return to front-end server by the RS485 interface, thereby realized goal of the invention of the present utility model.
Because the technique scheme utilization the utlity model has following advantage:
1. utility model need not to set up separately monitor network with monitoring and control signal and cable TV signal net transmission together in bidirectional optical fiber/coaxial cable hybrid network of equipment, can reducing the construction costs.
2. the utility model makes full use of the uplink and downlink channel resource of two-way cable TV network, can implement real-time continuously and remote monitoring in 24 hours to Wired TV network equipment, can in time find the fault of the network equipment, guarantees the normal operation of cable television network.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model embodiment;
Accompanying drawing 2 is the structural representation of the front end modulator-demodulator of the utility model embodiment;
Accompanying drawing 3 is the structural representation of the node interface unit of the utility model embodiment;
Accompanying drawing 4 is the theory diagram of the rf data modulator-demodulator of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Embodiment one:
Referring to accompanying drawing 1, adopt the RS485 interface to be connected between front-end server and the front end modulator-demodulator, up, downstream signal is by the transmission of two-way HFC net, and through the node interface unit, realization is to the control and management of optical node ups power.
Referring to accompanying drawing 2, the RS232/RS485 transducer that the front-end server serial line interface adopts band photoelectricity to isolate works in full duplex mode, has inner zero propagation and receives and dispatches translation function automatically, to support the query driven and the event-driven mode of operation of network management system.Photoelectricity isolation features and built-in anti-lightning strike protection device can shield interference noise, surge current voltage and the thunderbolt from cable television network, the safety of protection front-end server.This transducer directly obtains power supply from computer RS232 mouth, need not independent power supply, has made things convenient for the connection of system.
In the present embodiment, the front end microcontroller adopts the AT89C51 chip, and during downlink communication, front-end server and front end microcontroller carry out serial communication, and during uplink communication, data modem unit and front end microcontroller carry out serial communication.Because the front end microcontroller has only a SCI serial communication interface, has adopted a serial line interface multiplexer (MUX) in the circuit, switch according to communications status by front end microcontroller port, share the serial communication interface resource.
Referring to accompanying drawing 3, the online radiofrequency signal of two-way HFC is passed through radio modem, is input to the serial communication interface of node microcontroller.By node microcontroller program judgment data legitimacy, if data are intercepted in the process, the monitoring or the control command of this machine of mailing to address arranged, then start communication process with ups power.Because data transmission distance is nearer, node microcontroller and ups power adopt the parallel communications mode, to reduce the data transmission delay in the uplink and downlink process.Parallel communications adopts 8 data lines and 2 control lines, the signal of communication of transmission node microcontroller and ups power; Receive the command signal of node microcontroller when ups power after, send answer signal.In the present embodiment, the node interface unit structurally is built-in, is installed in ups power inside, and the power supply of communication interface card is obtained through the DC/DC conversion by storage battery, and system isolates fully with ups power, has improved the reliability of system.The DC/DC isolated variable adopts the independent-excited oscillating circuit based on UC3842, is the required low-voltage dc power supply of network interface unit with storage battery 36V voltage transformation.
Referring to accompanying drawing 4, the data-signal of front end microcontroller or node microcontroller, handle by modulator, and through filtering, amplification, become the radiofrequency signal that can in coaxial cable, transmit, simultaneously, receive radiofrequency signal from bidirectional optical fiber/coaxial cable hybrid network, through mixing, filtering, separate to be in harmonious proportion and export digital signal after the shaping, be transferred to front end microcontroller or node microcontroller again.It is oscillator signal that the uplink and downlink channel has all adopted phase-locked loop circuit respectively, and the automatic gain of great dynamic range control has solved the error code problem that different terminals sends and incoming level is inconsistent and cause.
Claims (4)
1. device to two-way cable TV network network monitoring of tools management, it is characterized in that: it passes through bidirectional optical fiber/coaxial cable hybrid network (HFC) by the front-end control center, constitute through node interface unit controls optical node uninterrupted power supply, described front-end control center is connected to form by RS485 interface and front end modulator-demodulator by front-end server; Described front end modulator-demodulator, the RS232/RS485 transducer of being isolated by band photoelectricity is connected through the PORT COM of RS485 interface with the front end microcontroller, the FPDP of front end microcontroller is connected with the rf data modulator-demodulator, the radiofrequency signal termination bidirectional optical fiber/coaxial cable hybrid network of rf data modulator-demodulator, the control port of front end microcontroller is connected with the transmitting-receiving Enable Pin of rf data modulator-demodulator; Described node interface unit, radiofrequency signal by bidirectional optical fiber/coaxial cable hybrid network transmission, after the rf data modem processes, be connected by the FPDP of its FPDP with the node microcontroller, the control port of node microcontroller is connected with rf data modulator-demodulator transmitting-receiving enable port, and the another port connects the control port of optical node uninterrupted power supply.
2. a kind of device according to claim 1 to the management of two-way cable TV network network monitoring of tools, it is characterized in that: described rf data modulator-demodulator, data-signal by front end microcontroller or node microcontroller connects the modulator input, output is through filter, connect the input of duplexer behind the amplifier, the output end signal of duplexer inserts bidirectional optical fiber/coaxial cable hybrid network, the radiofrequency signal output output signal of duplexer, through amplifier, frequency mixer, filter, demodulator, the output digital signal inserts bidirectional optical fiber/coaxial cable hybrid network.
3. a kind of device to the management of two-way cable TV network network monitoring of tools according to claim 1, it is characterized in that: described node interface unit places in the optical node uninterrupted power supply.
4. a kind of device to the management of two-way cable TV network network monitoring of tools according to claim 1 and 2, it is characterized in that: modulator, frequency mixer in the described rf data modulator-demodulator, its oscillator signal is produced by phase-locked loop circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02219521U CN2529474Y (en) | 2002-03-21 | 2002-03-21 | Device for monitoring and managing two-way wired TV. network equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02219521U CN2529474Y (en) | 2002-03-21 | 2002-03-21 | Device for monitoring and managing two-way wired TV. network equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2529474Y true CN2529474Y (en) | 2003-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02219521U Expired - Fee Related CN2529474Y (en) | 2002-03-21 | 2002-03-21 | Device for monitoring and managing two-way wired TV. network equipment |
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| CN (1) | CN2529474Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397891C (en) * | 2003-10-29 | 2008-06-25 | 成都润网科技有限公司 | Method for solving convergence interference using multi-nierarchy structure |
| CN101453518A (en) * | 2007-12-06 | 2009-06-10 | 李赤平 | Circuit for generating RS485 flow control signal by asynchronous communication |
| CN102647018A (en) * | 2011-02-18 | 2012-08-22 | 中兴通讯股份有限公司 | Single family unit (SFU) standby power source monitoring method and system |
| CN103686156A (en) * | 2013-12-25 | 2014-03-26 | 北京精一强远科技有限公司 | RS422 transmitting-receiving bidirectional monitoring circuit |
| CN106254964A (en) * | 2016-08-22 | 2016-12-21 | 安徽瑞宏信息科技有限公司 | Television network monitoring system |
| CN108337079A (en) * | 2017-01-17 | 2018-07-27 | 思科技术公司 | Front end for full duplex cable modem |
-
2002
- 2002-03-21 CN CN02219521U patent/CN2529474Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100397891C (en) * | 2003-10-29 | 2008-06-25 | 成都润网科技有限公司 | Method for solving convergence interference using multi-nierarchy structure |
| CN101453518A (en) * | 2007-12-06 | 2009-06-10 | 李赤平 | Circuit for generating RS485 flow control signal by asynchronous communication |
| CN102647018A (en) * | 2011-02-18 | 2012-08-22 | 中兴通讯股份有限公司 | Single family unit (SFU) standby power source monitoring method and system |
| CN102647018B (en) * | 2011-02-18 | 2015-10-28 | 中兴通讯股份有限公司 | A kind of single home unit is for electric method for supervising and system |
| CN103686156A (en) * | 2013-12-25 | 2014-03-26 | 北京精一强远科技有限公司 | RS422 transmitting-receiving bidirectional monitoring circuit |
| CN103686156B (en) * | 2013-12-25 | 2015-08-19 | 北京精一强远科技有限公司 | A kind of RS422 transmitting-receiving bidirectional supervises circuit |
| CN106254964A (en) * | 2016-08-22 | 2016-12-21 | 安徽瑞宏信息科技有限公司 | Television network monitoring system |
| CN108337079A (en) * | 2017-01-17 | 2018-07-27 | 思科技术公司 | Front end for full duplex cable modem |
| CN108337079B (en) * | 2017-01-17 | 2021-01-15 | 思科技术公司 | Front end for full duplex cable modem |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |