CN1322089A - Progressive hierarchical control method of cable TV system - Google Patents
Progressive hierarchical control method of cable TV system Download PDFInfo
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- CN1322089A CN1322089A CN 01106388 CN01106388A CN1322089A CN 1322089 A CN1322089 A CN 1322089A CN 01106388 CN01106388 CN 01106388 CN 01106388 A CN01106388 A CN 01106388A CN 1322089 A CN1322089 A CN 1322089A
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Abstract
The present invention discloses a progressive hierarchical control method of cable television system, and is characterized by setting channel-splitting filter and control signal processing mechanism in the device of cable television system to form network node, according to the action of the device in the network and connection mode partioning into different note layers, and utilizing progressive layer-by-layer continuous circulation control of all network nodes to implement cable television network management. Said method provides a shortcut for building program-controlled cable television network management system.
Description
The present invention relates to cable television system, is a kind of method of hierarchical control diverse network device step by step that realizes in cable television system.
Existing cable TV network adopts tree more, and the shared cable of uplink and downlink signals is added problems such as converging of user's return noise, makes that the reliable control that how to realize cable television system is a pendent difficult problem always.
The purpose of this invention is to provide and a kind ofly can simplify cable TV network control system structure, on tree network, realize the method for hierarchical control step by step, thereby pave the way for the reliable control of the whole network that realizes cable television system.
Progressive hierarchical control method of cable TV system provided by the invention is:
Device in the cable TV network is divided into different grades by function, is divided into different layers by connecting mode, adding channel-splitting filter and control signal processing mechanism make device become node in device;
Described channel-splitting filter is made up of upper and lower channel-splitting filter, is responsible for isolating original cable TV signal and control signal;
Described control signal processing mechanism is responsible for the processing of control signal;
The even higher level of node of network control system from network begins, the identical next stage node division of effect that even higher level of node is connected is one deck, the node division of next stage again that the next stage node is identical with the effect of its connection again is following one deck, until the end that is divided into network, even higher level of node all has the downstream site layer of oneself;
The network control center controls each node in the next stage node layer of this node by superior node, control node in the next stage node layer more, the node of the bottom in controlling to network by the node in this next stage node layer again;
After each node layer at different levels have all been controlled in the network, restart Control Circulation again.
The cable TV network control system structure of implementing the inventive method is:
By being set in the front end of cable television system, optical node, amplifier, splitter, user side, channel-splitting filter and control signal processing mechanism make them become node in the network;
The network control center is set, with the superior node of front end as its each optical node of subordinate on front end;
Optical node is divided into the optical node layer, and with the superior node of optical node as its each amplifier of subordinate, amplifier node under the optical node is divided into the amplifier layer of this optical node, with the splitter node division below the amplifier node is the splitter layer of this amplifier, the user endpoints below the splitter is divided into the client layer of this splitter;
The front-end control system is by preceding bringing in the control optical node, control the amplifier node in the amplifier layer of optical node by optical node, come the splitter node of the splitter layer of control amplifier then by amplifier node, control user endpoints in the client layer of splitter by the splitter node again;
After each layer device node at different levels have all been controlled in the network, restart Control Circulation again.
Described control signal processing mechanism is made of last demodulator, last modulator, processor, modulated device, following demodulator, wherein:
Last demodulator is responsible for the control signal that the demodulation superior node comes, and connects channel-splitting filter on this on the demodulator, connects processor down;
Last modulator is responsible for giving superior node with the feedback signal modulation of processor or downstream site, connects filter on this on the modulator, connects processor down;
Processor is responsible for processing control signals, connects demodulator and last modulator on this processor, connects modulated device and following demodulator down;
The modulated device is responsible for connecing processor with giving downstream site after the control signal modulation on this modulated device, connects down channel-splitting filter down;
Following demodulator is responsible for coming out to give processor with the feedback signal demodulation that downstream site comes, and connects processor on this modulated device, connects down channel-splitting filter down.
The operating frequency of described upward modulator and last demodulator is different.
Described modulated device is different with the operating frequency of following demodulator.
Implement cable TV network control system of the present invention compared with prior art, its advantage is: simplified cable TV network control system structure, alleviated the influence of user's noise to control system, this makes realizes that reliable webmaster is controlled to for possibility; Simultaneously, this control mode can be extracted the information of user side, and this just may for programme-controlled the providing of realizing cable TV network; Make cable television system realize blocking, modular network managerial structure by hierarchical control mode step by step, system extension no longer is subjected to the restriction of capacity, thereby provides condition for cable television system networks on a large scale.
Below in conjunction with accompanying drawing embodiments of the invention are described further:
Fig. 1 is for implementing the cable TV network of the present invention structured flowchart of hierarchy system step by step;
Fig. 2 is the theory diagram of network node;
As seen from the figure, the composition of the controlling organization of the cable TV network of enforcement cable TV network progressive hierarchical control method provided by the invention is:
Network node is to add upper and lower channel-splitting filter and control signal processing mechanism formation on the original uplink and downlink signals transfer function of cable TV device mechanism, wherein:
Last channel-splitting filter, on connect a grade cable television system, be connected to down line TV device original uplink and downlink signals transfer function mechanism and control signal processing mechanism;
The original uplink and downlink signals transfer function of cable TV device mechanism connects down channel-splitting filter down;
Following channel-splitting filter, on be connected to line TV device original uplink and downlink signals transfer function mechanism and control signal processing mechanism, connect down subordinate's cable television system;
The control signal processing mechanism is made of last demodulator, last modulator, processor, modulated device, following demodulator, wherein:
Last demodulator and last modulator, on connect channel-splitting filter, connect down processor;
Processor connects modulated device and following demodulator down;
Connect down channel-splitting filter under modulated device and the following demodulator;
Network node in the present embodiment comprises front end, optical node, amplifier, splitter and user side, wherein:
Front end connects optical node down, is in charge of optical node;
Optical node links by optical fiber with front end, is responsible for the control signal of receiving front-end and controls its amplifier down by this control signal, simultaneously the amplifier feedback signal is transmitted to front end;
Amplifier links to each other with optical node by coaxial cable, be responsible for to receive the control command of coming from optical node and controls splitter under it, simultaneously the splitter feedback signal is transmitted to optical node;
Splitter links to each other with amplifier by coaxial cable, be responsible for to receive the control command of coming from amplifier and control user side it under, simultaneously with the client feeds back signal forwarding to amplifier;
User side is given the user with the control signal that splitter comes, and the user feedback signal is sent to splitter.
In the present embodiment, the network control center is arranged on front end, down total N the optical node of front end; Optical node has M amplifier for 1 time, and the structure below other optical node is identical with optical node 1; Amplifier has P splitter for 1 time, and the structure below other amplifier is identical with amplifier 1; Splitter has Q user side for 1 time, and the structure below other splitter is identical with splitter 1.
The network control processing of present embodiment is divided into biography process and control signal feedback procedure under the control signal, does being described in detail below respectively.
The biography process is under the control signal of present embodiment:
The processor at front-end control center is sent to optical node by its modulated device modulation is back by after descending channel-splitting filter and the original signal of cable television system mixing with control signal;
Optical node leaches control signal by last channel-splitting filter from downstream signal, after last demodulator demodulation, deliver in the processor again, whether processor differentiates control signal to oneself, if not then ignoring this control signal, if then judgement is this optical node of control or will controls the following network node of this optical node, if control signal is this optical node of control, then receive and do respective handling, if control signal is to the network node below this optical node, then control signal is outputed to by the modulation of modulated device and by channel-splitting filter down and after the original signal of cable television system mixes below this optical node in the cable television system;
The operation principle of amplifier and splitter is identical with optical node, and control signal is delivered in the splitter by amplifier, delivers to user side by splitter again;
User side is given control signal in user's relevant device and is controlled the work of this equipment.
The control signal feedback procedure of single device course of work of present embodiment is:
After subscriber equipment receives control signal, give splitter with feedback signal by client feeds back, splitter is by after channel-splitting filter is isolated feedback signal down, send down the demodulator demodulation, treated again device is delivered to modulators modulate after handling, and then mixes through the original signal of last channel-splitting filter and cable television system and to be sent to amplifier;
Amplifier is identical with the feedback signal processing procedure and the splitter of optical node, and feedback signal is delivered to optical node by amplifier, delivers to the front-end control center again by optical node;
The front-end control center extracts feedback signal by descending filter, delivers to after following demodulator demodulation in the control computer wherein again, thereby finishes whole control process;
When controlling object was optical node, amplifier, splitter, they all can beam back the feedback signal of self, and the course of work is the same.
The overall network course of work of present embodiment is:
The front-end control system is by preceding bringing in the control optical node, control the amplifier node in the amplifier layer of optical node by optical node, come the splitter node of the splitter layer of control amplifier then by amplifier node, control user endpoints in the client layer of splitter by the splitter node again, after each layer device node at different levels have all been controlled in the network, restart Control Circulation again.
The above-mentioned execution mode of the inventive method is not unique, according to concrete cable TV network structure multiple mode can also be arranged, for example: the first, can mark off a plurality of independently undernet node layer under the above-mentioned network node; The second, above-mentioned front-end control center is the control amplifier layer directly; The 3rd, the splitter layer can directly be controlled by optical node in above-mentioned front-end control center; The 4th, the above-mentioned overall network course of work can only arrive the splitter layer; The 5th, the above-mentioned overall network course of work can only arrive the amplifier layer; The 6th, the above-mentioned overall network course of work can only arrive the optical node layer.
After the inventive method realized, its application prospect was very wide, now briefly introduces as follows:
The inventive method makes and realize that on the cable TV network tree network network management provides simple and direct approach, and the foundation of wired TV network management system is the thing of always dreaming of in this area.
The inventive method, can make the front-end control center directly extract the information of user side, this has just created condition for the programme-controlled cable TV network of realization, and just as stored-program control exchange is that telecommunications industry is brought rapid development, program control cable TV network will become the foundation stone of cable TV industry leap.
Claims (5)
1, a kind of progressive hierarchical control method of cable TV system is characterized in that:
Device in the cable TV network is divided into different grades by function, is divided into different layers by connecting mode, adding channel-splitting filter and control signal processing mechanism make device become node in device;
Described channel-splitting filter is made up of upper and lower channel-splitting filter, and last channel-splitting filter is responsible for isolating original cable TV signal and control signal, and following channel-splitting filter is responsible for mixing original cable TV signal and control signal;
Described control signal processing mechanism is responsible for reception, processing, the transmission of the control signal and the feedback signal that downstream site returns of superior node;
The even higher level of node of network control system from network begins, the identical next stage node division of effect that even higher level of node is connected is one deck, the node division of next stage again that the next stage node is identical with the effect of its connection again is following one deck, until the end that is divided into network, even higher level of node all has the downstream site layer of oneself;
The network control center controls each node in the next stage node layer of this node by superior node, control node in the next stage node layer more, the node of the bottom in controlling to network by the node in this next stage node layer again;
After each node layer at different levels have all been controlled in the network, restart Control Circulation again.
2, realize the cable TV network control system structure of the described method of claim 1, it is characterized in that:
By being set in the front end of cable television system, optical node, amplifier, splitter, user side, channel-splitting filter and control signal processing mechanism make them become node in the network;
The network control center is set, with the superior node of front end as its each optical node of subordinate on front end;
Optical node is divided into the optical node layer, and with the superior node of optical node as its each amplifier of subordinate, amplifier node under the optical node is divided into the amplifier layer of this optical node, with the splitter node division below the amplifier node is the splitter layer of this amplifier, the user endpoints below the splitter is divided into the client layer of this splitter;
The front-end control system is by preceding bringing in the control optical node, control the amplifier node in the amplifier layer of optical node by optical node, come the splitter node of the splitter layer of control amplifier then by amplifier node, control user endpoints in the client layer of splitter by the splitter node again;
After each layer device node at different levels have all been controlled in the network, restart Control Circulation again.
3, method according to claim 1 is characterized in that described control signal processing mechanism is made of last demodulator, last modulator, processor, modulated device, following demodulator, wherein:
Last demodulator is responsible for the control signal that the demodulation superior node comes, and connects channel-splitting filter on this on the demodulator, connects processor down;
Last modulator is responsible for giving superior node with the feedback signal modulation of processor or downstream site, connects filter on this on the modulator, connects processor down;
Processor is responsible for processing control signals, connects modulated device and following demodulator under this processor;
The modulated device is responsible for connecing down channel-splitting filter with giving downstream site after the control signal modulation under this modulated device;
Following demodulator is responsible for coming out to give processor with the feedback signal demodulation that downstream site comes, and connects down channel-splitting filter under this modulated device.
4, mechanism according to claim 3 is characterized in that the operating frequency of described upward modulator and last demodulator is different.
5, mechanism according to claim 3 is characterized in that described modulated device is different with the operating frequency of following demodulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106388 CN1322089A (en) | 2001-03-30 | 2001-03-30 | Progressive hierarchical control method of cable TV system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01106388 CN1322089A (en) | 2001-03-30 | 2001-03-30 | Progressive hierarchical control method of cable TV system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508642A (en) * | 2011-11-10 | 2012-06-20 | 华为技术有限公司 | Method and device for prefetching data |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508642A (en) * | 2011-11-10 | 2012-06-20 | 华为技术有限公司 | Method and device for prefetching data |
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