CN103326745B - Terrestrial digital television broadcasting redundancy transmitting device and redundancy method - Google Patents
Terrestrial digital television broadcasting redundancy transmitting device and redundancy method Download PDFInfo
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- CN103326745B CN103326745B CN201310265709.XA CN201310265709A CN103326745B CN 103326745 B CN103326745 B CN 103326745B CN 201310265709 A CN201310265709 A CN 201310265709A CN 103326745 B CN103326745 B CN 103326745B
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Abstract
The invention discloses a terrestrial digital television broadcasting redundancy transmitting device and a redundancy method, and relates to the digital television broadcasting technology. The terrestrial digital television broadcasting redundancy transmitting device and the redundancy method are economical and efficient. The terrestrial digital television broadcasting redundancy transmitting device is characterized by comprising a system controller, a transmitter unit, a selector switch set, a multiplexer and a transmitting antenna. The transmitter unit comprises working transmitters and standby transmitters. The system controller is in signal connection with each selector switch in the selector switch set and each transmitter in the transmitter unit respectively. The system controller is used for switching input programme signals and outputting the programme signals to the working transmitters. The system controller is used for dispatching and controlling each transmitter in the transmitter unit to work or stand by according to the working conditions of the working transmitters and for controlling the selector switch set to connect the radio-frequency signal output ends of the working transmitters to the multiplexer in a coupling mode. The multiplexer is connected with the transmitting antenna in a coupling mode.
Description
Technical field
The present invention relates to digital TV Broadcasting Techniques, be a kind of ground digital television broadcast redundancy backup emitter and redundancy approach, be applicable to the network planning of large and medium-sized television transmitting station and configuration.
Background technology
The development of communication and information technology, has caused the dramatic change of radio and television, and Digital Television will be the key link of this change, the quickening changed to Digital Television along with simulated television, and traditional technology and equipment can not meet the demand of market and user.
In the analog television broadcast epoch, traditional transmission of television mode adopts (main frame+standby host) mode of operation shown in Fig. 1 usually, namely a main frame is had, just must configure a standby host, and can realize between active and standby machine automatically switching, when main frame breaks down, substituted by standby host, avoid program to broadcast and interrupt.
Along with the development of digital technology and the increase of amount of information, a transmitting station often needs to relay multiple programs simultaneously, if mode of operation still traditionally gives every platform host configuration one standby host, so required standby host high number, and within the overwhelming majority time, standby host is all in standby state of breaking, and so both wastes resource, add cost, also make troubles to maintenance and management.
So just there is ground digital television broadcast 2+1 emitter redundancy backup system as shown in Figure 2, this mode solves conventional television broadcast (main frame+standby host) mode of operation poor efficiency, backwardness, cost is high, automaticity is on the low side problem, promotes technology content and the intelligent level of ground digital television broadcast.This system adopts the transmitter of 1 frequency agility as the public standby host of 2 different frequency transmitters, when certain master transmitter breaks down, standby transmitter automatically (or manual) switches the transmitter replacing and break down, keep whole system normally to broadcast, the output of each transmitter is closed behind road through multiplexer and is launched by a secondary broad-band antenna.
But there are some shortcomings in existing 2+1 system: these transmitters have dividing of standby machine, and standby host is in holding state for a long time, reduces service efficiency.After each fault occurs, standby host replaces corresponding main frame, after main frame is fixed, be manually switched to Host Status, make standby host be in holding state, when other transmitter of such guarantee is out of order, can automatically switch to standby host.Therefore artificially increase the off-air time of system, reduce the MTBF(mean free error time of whole system) and the reliability of whole system; Simultaneously can not full automatic working, manual intervention, intelligence degree is low.
In order to improve the MTBF of whole transmitter system, reducing the off-air time of system, improving intelligent, automaticity.In economy and science and technology growing today, traditional television emission system pattern needs to upgrade and transformation.
Summary of the invention
Technical problem to be solved by this invention is conventional television broadcast (main frame+standby host) mode of operation and existing ground digital television broadcast 2+1 redundancy transmission device (hereinafter referred to as 2+1 system) poor efficiency, backwardness, problem that cost is high, for above-mentioned Problems existing, the invention provides a kind of economic, efficient ground digital television broadcast redundancy transmission device and redundancy approach.
Ground digital television broadcast redundancy transmission device disclosed by the invention, comprises system controller, launches unit, diverter switch group, multiplexer and transmitting antenna; Operating emission machine and standby transmitter is comprised in described transmitting unit; Described system controller all has signal to be connected with each diverter switch in described diverter switch group, each transmitter launched in unit; System controller switches the programme signal of input and exports to operating emission machine; Described system controller is used for dispatch according to the operating state of operating emission machine and controls transmitter in group each transmitter work or standby and for the RF signal output of operating emission machine being coupled to multiplexer by control diverter switch group; Described multiplexer and transmitting antenna couple.
Preferably, described transmitting unit comprises 3 transmitters; Wherein the quantity of standby transmitter is 1.
Preferably, the RF signal output mouth of two operating emission machines is coupled to multiplexer by the strobe state changing each diverter switch in diverter switch group by described system controller.
Preferably, described diverter switch group comprises 3 four port dpdt double-pole double-throw (DPDT) coaxial triggers;
First port of the first coaxial trigger is connected with the RF signal output of the first transmitter launched in unit, second port of the first coaxial trigger is connected with the first port of the second coaxial trigger, 3rd port of the first coaxial trigger is connected with the RF signal output launching the second transmitter in unit, and the 4th port of the first coaxial trigger is connected with the first port of the 3rd coaxial trigger;
Second port of the second coaxial trigger is connected with the 3rd port of the 3rd coaxial trigger, 3rd port of the second coaxial trigger is connected with the RF signal output of the 3rd transmitter launching unit, and the 4th port of the second coaxial trigger is connected with the second frequency input of multiplexer;
Second port of the 3rd coaxial trigger is connected to dummy load; 4th port of the 3rd coaxial trigger is connected with the first frequency input of multiplexer;
The strobe state of each coaxial trigger comprises two kinds, and the first strobe state is that the first port and the second port are connected and the 3rd port and the 4th port are connected; The second strobe state is that the first port and the 4th port are connected and the second port and the 3rd port are connected.
Digital television transmitting device redundancy approach disclosed by the invention, comprises the following steps:
In transmitting unit, operating emission machine and standby transmitter are set; Operating emission machine program receiving source inputs, and is sent programme signal by transmitting antenna after radiofrequency signal through Channel Coding and Modulation;
Testing transmitter operating state;
When operating emission machine fault, control operating emission machine and quit work, standby transmitter is switched to operating emission machine simultaneously;
Fault transmitter fix a breakdown after as standby transmitter.
Preferably, when operating emission machine fault, control operating emission machine and quit work: control operating emission office and close, cut off the radiofrequency signal of this fail operation transmitter; Standby transmitter is switched to operating emission machine: control standby transmitter-on simultaneously, set operating frequency and the modulating mode of this standby transmitter, there is provided programme signal to this standby transmitter, this standby transmitter exports radiofrequency signal, and described radiofrequency signal is sent by transmitting antenna.
Preferably, adopt a system controller to dispatch according to the operating state of operating emission machine and control transmitter each transmitter work or standby in group, thus changing the redundant state of launching unit;
Control one by described system controller and switch switches set, the RF signal output of operating emission machine is coupled to a multiplexer;
The radiofrequency signal that operating emission machine exports is synthesized a road signal and is gone out by transmission antennas transmit by multiplexer.
Preferably, described transmitting unit comprises 3 transmitters; Wherein the quantity of operating emission machine is 2;
Described transmitting unit has 6 kinds of redundant states;
Wherein, the first redundant state is the first transmitter and the second transmitter is operating emission machine, and the 3rd transmitter is standby transmitter, and the first transmitter exports the radiofrequency signal of first frequency, and the second transmitter exports the radiofrequency signal of second frequency;
The second redundant state is the second transmitter and the 3rd transmitter is operating emission machine, and the first transmitter is standby transmitter, and the 3rd transmitter exports the radiofrequency signal of first frequency, and the second transmitter exports the radiofrequency signal of second frequency;
The third redundant state is the first transmitter and the 3rd transmitter is operating emission machine, and the second transmitter is standby transmitter, and the first transmitter exports the radiofrequency signal of first frequency, and the 3rd transmitter exports the radiofrequency signal of second frequency;
4th kind of redundant state is the first transmitter and the 3rd transmitter is operating emission machine, and the second transmitter is standby transmitter, and the 3rd transmitter exports the radiofrequency signal of first frequency, and the first transmitter exports the radiofrequency signal of second frequency;
5th kind of redundant state is the second transmitter and the 3rd transmitter is operating emission machine, and the first transmitter is standby transmitter, and the second transmitter exports the radiofrequency signal of first frequency, and the 3rd transmitter exports the radiofrequency signal of second frequency;
6th kind of redundant state is the first transmitter and the second transmitter is operating emission machine, and the 3rd transmitter is standby transmitter, and the second transmitter exports the radiofrequency signal of first frequency, and the first transmitter exports the radiofrequency signal of second frequency.
Preferably, when launching unit and being in the first redundant state, if the first transmitter failure, launch unit and enter the second redundant state, if the second transmitter failure, launch unit and enter the third redundant state;
When launching unit and being in the second redundant state, if the second transmitter failure, launch unit and enter the 4th kind of redundant state, if the 3rd transmitter failure, launch unit and enter the first redundant state;
When launching unit and being in the third redundant state, if the first transmitter failure, launch unit and enter the 5th kind of redundant state, if the 3rd transmitter failure, launch unit and enter the first redundant state;
When launching unit and being in the 4th kind of redundant state, if the first transmitter failure, launch unit and enter the second redundant state, if the 3rd transmitter failure, launch unit and enter the 6th kind of redundant state;
When launching unit and being in the 5th kind of redundant state, if the second transmitter failure, launch unit and enter the third redundant state, if the 3rd transmitter failure, launch unit and enter the 6th kind of redundant state;
When launching unit and being in the 6th kind of redundant state, if the first transmitter failure, launch unit and enter the 5th kind of redundant state, if the second transmitter failure, launch unit and enter the 4th kind of redundant state.
Preferably, described diverter switch group comprises 3 four port dpdt double-pole double-throw (DPDT) coaxial triggers;
First port of the first coaxial trigger is connected with the RF signal output of the first transmitter launched in unit, second port of the first coaxial trigger is connected with the first port of the second coaxial trigger, 3rd port of the first coaxial trigger is connected with the RF signal output launching the second transmitter in unit, and the 4th port of the first coaxial trigger is connected with the first port of the 3rd coaxial trigger;
Second port of the second coaxial trigger is connected with the 3rd port of the 3rd coaxial trigger, 3rd port of the second coaxial trigger is connected with the RF signal output of the 3rd transmitter launching unit, and the 4th port of the second coaxial trigger is connected with the second frequency input of multiplexer;
Second port of the 3rd coaxial trigger is connected to dummy load; 4th port of the 3rd coaxial trigger is connected with the first frequency input of multiplexer;
The strobe state of each coaxial trigger comprises two kinds, and the first strobe state is that the first port and the second port are connected and the 3rd port and the 4th port are connected; The second strobe state is that the first port and the 4th port are connected and the second port and the 3rd port are connected;
Wherein, the first coaxial trigger is the second strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the first redundant state;
First coaxial trigger is the second strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the first strobe state, launches unit and be in the second redundant state;
First coaxial trigger is the second strobe state, and the second coaxial trigger is the first strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the third redundant state;
First coaxial trigger is the first strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the first strobe state, launches unit and be in the 4th kind of redundant state;
First coaxial trigger is the first strobe state, and the second coaxial trigger is the first strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the 5th kind of redundant state;
First coaxial trigger is the first strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the 6th kind of redundant state.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1. solve N+1(N platform operating emission machine and 1 standby transmitter) to launch unit MTBF low, and reduce the off-air time of whole transmitter system, improve the reliability of whole system.Promote the technology content of ground digital television broadcast and intelligent water, meet the demand of market and user.
2. System's composition is simple and direct, clear, intelligent and automaticity is higher, meets the requirement of terrestrial DTV redundancy backup transmitting.
3. the present invention proposes the concept of standby machine each other, namely according to operating emission machine operating state, the every platform transmitter launching unit all can be configured to operating emission machine and standby transmitter, there is no the differentiation of standby machine, they are standby machine each other, substantially increase the operating efficiency of every platform transmitter, save the resources such as standby host quantity, reduce cost.
4. improve the MTBF time of whole system.The longevity of service of main frame in traditional 2+1 system, standby host is in holding state for a long time, and the standby host operating time is short, reduces standby host service efficiency, and the MTBF of whole system is low.And the application due to each transmitter standby machine each other, each transmitter operating time is determined automatically by system running state, thus improves the MTBF time of whole system, strengthens the reliability of whole system.
5. decrease system off-air time about 50%.After each fault of traditional 2+1 system occurs, standby host replaces corresponding main frame, after main frame is fixed, be manually switched to Host Status, make standby host be in holding state, when other transmitter of such guarantee is out of order, can standby host be automatically switched to, and handoff procedure comprises pass standby host, switch coaxial switch, open a series of actions such as main frame, the whole time wants about 1 minute, therefore artificially increase the off-air time of system, radio data system can not be met well to the requirement of breaking.And after the application's main frame fixes, need not be switched to this main frame again, the main frame fixed, as new standby host, decreases handoff procedure, thus decreases off-air time.
6. decrease the switching times of coaxial switch, improve the MTBF of coaxial switch, thus enhance the reliability of whole system.The application only has after one of them operation transmitter breaks down, just switch one of them coaxial switch, from the 4th beneficial effect, compared to traditional 2+1 system, the application decreases the coaxial switch switching times of 50%, thus improves the MTBF of coaxial switch.
7. the redundancy approach in the application provides a kind of new dispatching algorithm, to automatically switch corresponding coaxial switch according to the running status of whole system.
8., by adopting multiplexer and broadband emission antenna, optimizing Equipments Setting, decreasing antenna and feeder line quantity, have compressed steel tower and take up room.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Tradition (main frame+standby host) mode of operation schematic diagram when Fig. 1 is relay 2 programs.
Fig. 2 is conventional digital TV broadcast 2+1 emission mode schematic diagram.
The first redundant state of transmitting unit of emitter in Fig. 3 ground digital television broadcast redundancy transmission of the present invention device specific embodiment schematic diagram and the present invention.
The structural representation of Fig. 4 diverter switch of the present invention specific embodiment.
Unit redundant state transition diagram is launched in Fig. 5 the inventive method.
Fig. 6 is transmitting unit the second redundant state of emitter in the present invention.
Fig. 7 is the third redundant state of transmitting unit of emitter in the present invention.
Fig. 8 is transmitting unit the 4th kind of redundant state of emitter in the present invention.
Fig. 9 is transmitting unit the 5th kind of redundant state of emitter in the present invention.
Figure 10 is transmitting unit the 6th kind of redundant state of emitter in the present invention.
Embodiment
All features disclosed in this specification, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Ground digital television broadcast redundancy transmission device disclosed by the invention, comprises system controller, launches unit, diverter switch group, multiplexer and transmitting antenna.Described system controller all has signal to be connected with each diverter switch in described diverter switch group, each transmitter launched in unit; Comprise operating emission machine and standby transmitter in described transmitting unit, described system controller is used for dispatch according to the operating state of operating emission machine and controls transmitter in group each transmitter work or standby and for the RF signal output of operating emission machine being coupled to multiplexer by control coaxial trigger group; Described multiplexer and transmitting antenna couple.
Wherein, system controller also has signal with program source and far-end control centre and is connected, the programme signal in its program receiving source also switches programme signal and exports to operating emission machine, and the transmitter of system controller also for receiving far-end control centre is opened, the master control signal of closing transmitter operating state is transferred to far-end control centre.
Operating emission machine in the present invention refers to the transmitter being set and needing work, it is opening, the operating frequency displacement instruction that receiving system controller exports, modulating mode displacement instruction and programme signal, according to the frequency set and modulating mode, programme signal is carried out Channel Coding and Modulation and obtain radiofrequency signal, described radiofrequency signal is gone out by antenna transmission.Standby transmitter refers to the transmitter being set and temporarily not needing work, and it is closed condition, does not receive and does not also export radiofrequency signal.
When the quantity of launching operating emission machine in unit is at least 2, the RF signal output of each operating emission machine needs first to be connected with multiplexer, the radiofrequency signal of multichannel different operating frequency is combined into by transmission antennas transmit behind a road by multiplexer, and transmitting antenna is here preferably broadband emission antenna.
Described broadband emission antenna is used for signal to launch in the form of an electromagnetic wave, finally realizes the wireless coverage of ground digital television broadcast.The present invention's broadband emission used antenna meets but is not limited to following index: input impedance 50 Ω, working band 470 ~ 860MHz, voltage standing wave ratio≤1.1, power capacity 10kW, the relative half-wave dipole of gain 10.5dB(), level (or vertical) polarization mode.
As Fig. 3, in a specific embodiment of apparatus of the present invention, described transmitting unit comprises 3 transmitters; Wherein the quantity of operating emission machine is 2.Preferably, the RF signal output mouth of two operating emission machines is coupled to multiplexer by the strobe state changing each diverter switch in diverter switch group by described system controller.
When transmitter only has at most two operating emission machines, multiplexer can select No. 2 synthesizers.The multiplexer of No. 2 synthesizers to be a kind of 2 road signal syntheses by different frequency be road signal, its synthesis mode has constant impedance shape or star usually, also has the mixed type mode of employing star+constant impedance shape.The filter used in multiplexer is very big to isolation Index Influence, usually selects that Q value is higher, insertion loss is lower, the cross-linked band pass filter of the good six chamber band of selectivity.This patent multiplexer used meets but is not limited to following index: when input and output impedance 50 Ω, voltage standing wave ratio≤1.15, maximal input 1.5kW, peak power output 6kW, maximum insertion 1dB(N=5), non-adjacent channel isolation >=40dB, minimum frequency space 8 MHz between each road.
In another embodiment, described diverter switch group comprises 3 four port dpdt double-pole double-throw (DPDT) coaxial triggers.
The first port K1a of coaxial trigger K1 is connected with the RF signal output of the transmitter T1 launched in unit, the second port K1b of coaxial trigger K1 is connected with the first port K2a of coaxial trigger K2, the 3rd port K1c of coaxial trigger K1 is connected with the RF signal output launching transmitter T2 in unit, and the 4th port K1d of coaxial trigger K1 is connected with the first port K3a of coaxial trigger K3.
The second port K2b of coaxial trigger K2 is connected with the 3rd port K3c of coaxial trigger K3, the 3rd port K2c of coaxial trigger K2 is connected with the RF signal output of the transmitter T3 launching unit, and the 4th port K2d of coaxial trigger K2 is connected with the second frequency B input of multiplexer;
The second port K3b of coaxial trigger K3 is connected to dummy load; The 4th port K3d of coaxial trigger K3 is connected with the first frequency A input of multiplexer.
More specifically, described coaxial trigger can select dynaform.As Fig. 4, be controlled by system controller, synchronous conversion is done in the position of dynaform inner wire A and inner wire B under motor drives, when inner wire A is connected to first and second port, inner wire B is then connected to three, four ports, and this kind of state is referred to as the first strobe state of coaxial trigger by the present invention; Otherwise inner wire A is connected to one, four ports time, inner wire B is then connected to three, Two-port netwerk, and this kind of state is referred to as the second strobe state of coaxial trigger by the present invention.This dynaform the key technical indexes is but is not limited to: each port Impedance 50 Ω, operating frequency 0 ~ 1000MHz, voltage standing wave ratio≤1.1, insertion loss 0.1dB, isolation >=40dB, power capacity 1.5kW.
Dummy load in the present invention is a kind of device of alternative transmitter actual loading (i.e. antenna), and be connected with coaxial trigger, its matching properties is identical with antenna, but can not outside wireless signal emission, for debugging and the measurement of fault transmitter.For meeting system requirements, dummy load has wider working band and higher standing-wave ratio index usually, and its shielding measure is strict, and anti-electromagnetic-radiation ability is comparatively strong, and spatial electromagnetic can not be caused to pollute and personal injury.The key technical indexes of this patent dummy load used is but is not limited to: input impedance 50 Ω, working band 0 ~ 1000MHz, standing wave ratio of input voltage≤1.1, type of cooling oil cooling, power capacity 1.5 kW.
Concrete, adopt RS485 or Ethernet RJ45 communication interface between system controller and each transmitter; The mode interface such as RS485 or Ethernet RJ45, GPRS, short message communication can be adopted between system controller and far-end control centre (can be long-range PC); ASI data-interface is adopted between the input of system controller program and program source; ASI data-interface is adopted between the output of system controller program and each transmitter program input; Analog signal control interface is adopted between system controller and coaxial trigger; Interlock protection between each transmitter and each coaxial trigger adopts analog signal control interface, and the object of interlock protection guarantees once a state in three coaxial triggers to be changed; Each transmitter export with between corresponding coaxial trigger, each coaxial trigger exports and is connected with adopting radio frequency coaxial-cable or hard feed tube between multiplexer, between coaxial trigger with dummy load, between multiplexer with transmitting antenna.
Ground digital television broadcast emitter redundancy approach disclosed by the invention, comprises the following steps: in transmitting unit, arrange operating emission machine and standby transmitter; Operating emission machine program receiving source inputs, and exports radiofrequency signal, and radiofrequency signal is sent by transmitting antenna; Testing transmitter operating state; When operating emission machine fault, control operating emission machine and quit work, control standby transmitter-on simultaneously, standby transmitter is converted to the input of operating emission machine program receiving source, exports radiofrequency signal, and radiofrequency signal is sent by transmitting antenna; Fault transmitter fix a breakdown after as standby transmitter.
Said method can preferably be realized by emitter disclosed by the invention: adopt system controller dispatch according to the operating state of operating emission machine and control transmitter each transmitter work or standby in group, thus change the redundant state of launching unit; Control coaxial trigger group by described system controller, the RF signal output of operating emission machine is coupled to multiplexer; The radiofrequency signal that operating emission machine exports is synthesized a road signal and is gone out by transmission antennas transmit by multiplexer.
When said method adopts the emitter shown in Fig. 3, described transmitting unit has 6 kinds of redundant states.
Wherein, see Fig. 3, the first redundant state is transmitter T1 and transmitter T2 is operating emission machine, and transmitter T3 is standby transmitter, and transmitter T1 exports the radiofrequency signal of first frequency A, and transmitter T2 exports the radiofrequency signal of second frequency A.
As Fig. 6, the second redundant state is transmitter T2 and transmitter T3 is operating emission machine, and transmitter T1 is standby transmitter, and transmitter T3 exports the radiofrequency signal of first frequency A, and transmitter T2 exports the radiofrequency signal of second frequency B.
As Fig. 7, the third redundant state is transmitter T1 and transmitter T3 is operating emission machine, and transmitter T2 is standby transmitter, and transmitter T1 exports the radiofrequency signal of first frequency A, and transmitter T3 exports the radiofrequency signal of second frequency B.
As Fig. 8, the 4th kind of redundant state is transmitter T1 and transmitter T3 is operating emission machine, and transmitter T2 is standby transmitter, and transmitter T3 exports the radiofrequency signal of first frequency A, and transmitter T1 exports the radiofrequency signal of second frequency B.
As Fig. 9, the 5th kind of redundant state is transmitter T2 and transmitter T3 is operating emission machine, and transmitter T1 is standby transmitter, and transmitter T2 exports the radiofrequency signal of first frequency A, and transmitter T3 exports the radiofrequency signal of second frequency B.
As Figure 10, the 6th kind of redundant state is transmitter T1 and transmitter T2 is operating emission machine, and transmitter T3 is standby transmitter, and transmitter T2 exports the radiofrequency signal of first frequency A, and transmitter T1 exports the radiofrequency signal of second frequency B.
When transmitter breaks down under different redundant state, system controller controls transmitter group and switches redundant state.As Fig. 5, concrete switching mode is preferably:
When launching unit and being in the first redundant state, if transmitter T1 fault, launch unit and enter the second redundant state, if transmitter T2 fault, launch unit and enter the third redundant state.
When launching unit and being in the second redundant state, if transmitter T2 fault, launch unit and enter the 4th kind of redundant state, if transmitter T3 fault, launch unit and enter the first redundant state.
When launching unit and being in the third redundant state, if transmitter T1 fault, launch unit and enter the 5th kind of redundant state, if transmitter T3 fault, launch unit and enter the first redundant state.
When launching unit and being in the 4th kind of redundant state, if transmitter T1 fault, launch unit and enter the second redundant state, if transmitter T3 fault, launch unit and enter the 6th kind of redundant state.
When launching unit and being in the 5th kind of redundant state, if transmitter T2 fault, launch unit and enter the third redundant state, if transmitter T3 fault, launch unit and enter the 6th kind of redundant state.
When launching unit and being in the 6th kind of redundant state, if transmitter T1 fault, launch unit and enter the 5th kind of redundant state, if transmitter T2 fault, launch unit and enter the 4th kind of redundant state.
Preferably, when emitter adopts dynaform as shown in Figure 4, and enter Fig. 3 such mode when connecting transmitter and dynaform, the gated fashion that only need control each switch just can switch transmitting unit redundant state fast.
Wherein, coaxial trigger K1 is the second strobe state, and coaxial trigger K2 is the second strobe state, and when coaxial trigger K3 is the second strobe state, launches unit and be in the first redundant state.
Coaxial trigger K1 is the second strobe state, and coaxial trigger K2 is the second strobe state, and when coaxial trigger K3 is the first strobe state, launches unit and be in the second redundant state.
Coaxial trigger K1 is the second strobe state, and coaxial trigger K2 is the first strobe state, and when coaxial trigger K3 is the second strobe state, launches unit and be in the third redundant state.
Coaxial trigger K1 is the first strobe state, and coaxial trigger K2 is the second strobe state, and when coaxial trigger K3 is the first strobe state, launches unit and be in the 4th kind of redundant state.
Coaxial trigger K1 is the first strobe state, and coaxial trigger K2 is the first strobe state, and when coaxial trigger K3 is the second strobe state, launches unit and be in the 5th kind of redundant state.
Coaxial trigger K1 is the first strobe state, and coaxial trigger K2 is the second strobe state, and when coaxial trigger K3 is the second strobe state, launches unit and be in the 6th kind of redundant state.
The benefit done like this is, when set state is launched in each switching, system controller only need change the strobe state of a coaxial trigger, substantially reduces MTBF, improves system reliability.As Fig. 5, when launching unit and being in the first redundant state, if the first transmitter T1 fault, change coaxial trigger K3 into the first strobe state, launch unit and enter the second redundant state, if the second transmitter T2 fault, changes coaxial trigger K2 into the first strobe state, launch unit and enter the third redundant state.
When launching unit and being in the second redundant state, if the second transmitter T2 fault, change coaxial trigger K1 into the first strobe state, launch unit and enter the 4th kind of redundant state, if the 3rd transmitter T3 fault, coaxial trigger K3 is switched to the second strobe state, launches unit and enter the first redundant state.
When launching unit and being in the third redundant state, if the first transmitter T1 fault, change coaxial trigger K1 into the first strobe state, launch unit and enter the 5th kind of redundant state, if the 3rd transmitter T3 fault, change coaxial trigger K2 into the second strobe state, launch unit and enter the first redundant state.
When launching unit and being in the 4th kind of redundant state, if the first transmitter T1 fault, change coaxial trigger K1 into the second strobe state, launch unit and enter the second redundant state, if the 3rd transmitter T3 fault, change coaxial trigger K3 into the second strobe state, launch unit and enter the 6th kind of redundant state.
When launching unit and being in the 5th kind of redundant state, if the second transmitter T2 fault, change coaxial trigger K1 into the second strobe state, launch unit and enter the third redundant state, if the 3rd transmitter T3 fault, change coaxial trigger K2 into the second strobe state, launch unit and enter the 6th kind of redundant state.
When launching unit and being in the 6th kind of redundant state, if the first transmitter T1 fault, change coaxial trigger K2 into the first strobe state, launch unit and enter the 5th kind of redundant state, if the second transmitter T2 fault, change coaxial trigger K3 into the first strobe state, launch unit and enter the 4th kind of redundant state.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (7)
1. a Digital Television redundancy transmission device, is characterized in that, comprises system controller, launches unit, diverter switch group, multiplexer and transmitting antenna;
Operating emission machine and standby transmitter is comprised in described transmitting unit;
Described system controller all has signal to be connected with each diverter switch in described diverter switch group, each transmitter launched in unit; System controller is for switching the programme signal of input and exporting to operating emission machine;
Described system controller is used for dispatch according to the operating state of operating emission machine and controls transmitter in group each transmitter work or standby and for the RF signal output of operating emission machine being coupled to multiplexer by control diverter switch group;
Described multiplexer and transmitting antenna couple;
Described transmitting unit comprises 3 transmitters; Wherein the quantity of operating emission machine is 2;
Described transmitting unit has 6 kinds of redundant states;
Wherein, the first redundant state is the first transmitter and the second transmitter is operating emission machine, and the 3rd transmitter is standby transmitter, and the first transmitter exports the radiofrequency signal of first frequency, and the second transmitter exports the radiofrequency signal of second frequency;
The second redundant state is the second transmitter and the 3rd transmitter is operating emission machine, and the first transmitter is standby transmitter, and the 3rd transmitter exports the radiofrequency signal of first frequency, and the second transmitter exports the radiofrequency signal of second frequency;
The third redundant state is the first transmitter and the 3rd transmitter is operating emission machine, and the second transmitter is standby transmitter, and the first transmitter exports the radiofrequency signal of first frequency, and the 3rd transmitter exports the radiofrequency signal of second frequency;
4th kind of redundant state is the first transmitter and the 3rd transmitter is operating emission machine, and the second transmitter is standby transmitter, and the 3rd transmitter exports the radiofrequency signal of first frequency, and the first transmitter exports the radiofrequency signal of second frequency;
5th kind of redundant state is the second transmitter and the 3rd transmitter is operating emission machine, and the first transmitter is standby transmitter, and the second transmitter exports the radiofrequency signal of first frequency, and the 3rd transmitter exports the radiofrequency signal of second frequency;
6th kind of redundant state is the first transmitter and the second transmitter is operating emission machine, and the 3rd transmitter is standby transmitter, and the second transmitter exports the radiofrequency signal of first frequency, and the first transmitter exports the radiofrequency signal of second frequency;
When launching unit and being in the first redundant state, if the first transmitter failure, launch unit and enter the second redundant state, if the second transmitter failure, launch unit and enter the third redundant state;
When launching unit and being in the second redundant state, if the second transmitter failure, launch unit and enter the 4th kind of redundant state, if the 3rd transmitter failure, launch unit and enter the first redundant state;
When launching unit and being in the third redundant state, if the first transmitter failure, launch unit and enter the 5th kind of redundant state, if the 3rd transmitter failure, launch unit and enter the first redundant state;
When launching unit and being in the 4th kind of redundant state, if the first transmitter failure, launch unit and enter the second redundant state, if the 3rd transmitter failure, launch unit and enter the 6th kind of redundant state;
When launching unit and being in the 5th kind of redundant state, if the second transmitter failure, launch unit and enter the third redundant state, if the 3rd transmitter failure, launch unit and enter the 6th kind of redundant state;
When launching unit and being in the 6th kind of redundant state, if the first transmitter failure, launch unit and enter the 5th kind of redundant state, if the second transmitter failure, launch unit and enter the 4th kind of redundant state.
2. Digital Television redundancy transmission device according to claim 1, is characterized in that,
The RF signal output mouth of two operating emission machines is coupled to multiplexer by the strobe state changing each diverter switch in diverter switch group by described system controller.
3. Digital Television redundancy transmission device according to claim 2, is characterized in that,
Described diverter switch group comprises 3 four port dpdt double-pole double-throw (DPDT) coaxial triggers;
First port of the first coaxial trigger is connected with the RF signal output of the first transmitter launched in unit, second port of the first coaxial trigger is connected with the first port of the second coaxial trigger, 3rd port of the first coaxial trigger is connected with the RF signal output launching the second transmitter in unit, and the 4th port of the first coaxial trigger is connected with the first port of the 3rd coaxial trigger;
Second port of the second coaxial trigger is connected with the 3rd port of the 3rd coaxial trigger, 3rd port of the second coaxial trigger is connected with the RF signal output of the 3rd transmitter launching unit, and the 4th port of the second coaxial trigger is connected with the second frequency input of multiplexer;
Second port of the 3rd coaxial trigger is connected to dummy load; 4th port of the 3rd coaxial trigger is connected with the first frequency input of multiplexer;
The strobe state of each coaxial trigger comprises two kinds, and the first strobe state is that the first port and the second port are connected and the 3rd port and the 4th port are connected; The second strobe state is that the first port and the 4th port are connected and the second port and the 3rd port are connected.
4. a digital television transmitting device redundancy approach, is characterized in that, comprises the following steps:
In transmitting unit, operating emission machine and standby transmitter are set; Operating emission machine program receiving signal, export radiofrequency signal, described radiofrequency signal is sent by transmitting antenna;
Testing transmitter operating state;
When operating emission machine fault, control operating emission machine and quit work, standby transmitter is switched to operating emission machine simultaneously;
Fault transmitter fix a breakdown after as standby transmitter;
Described transmitting unit comprises 3 transmitters; Wherein the quantity of operating emission machine is 2;
Described transmitting unit has 6 kinds of redundant states;
Wherein, the first redundant state is the first transmitter and the second transmitter is operating emission machine, and the 3rd transmitter is standby transmitter, and the first transmitter exports the radiofrequency signal of first frequency, and the second transmitter exports the radiofrequency signal of second frequency;
The second redundant state is the second transmitter and the 3rd transmitter is operating emission machine, and the first transmitter is standby transmitter, and the 3rd transmitter exports the radiofrequency signal of first frequency, and the second transmitter exports the radiofrequency signal of second frequency;
The third redundant state is the first transmitter and the 3rd transmitter is operating emission machine, and the second transmitter is standby transmitter, and the first transmitter exports the radiofrequency signal of first frequency, and the 3rd transmitter exports the radiofrequency signal of second frequency;
4th kind of redundant state is the first transmitter and the 3rd transmitter is operating emission machine, and the second transmitter is standby transmitter, and the 3rd transmitter exports the radiofrequency signal of first frequency, and the first transmitter exports the radiofrequency signal of second frequency;
5th kind of redundant state is the second transmitter and the 3rd transmitter is operating emission machine, and the first transmitter is standby transmitter, and the second transmitter exports the radiofrequency signal of first frequency, and the 3rd transmitter exports the radiofrequency signal of second frequency;
6th kind of redundant state is the first transmitter and the second transmitter is operating emission machine, and the 3rd transmitter is standby transmitter, and the second transmitter exports the radiofrequency signal of first frequency, and the first transmitter exports the radiofrequency signal of second frequency;
When launching unit and being in the first redundant state, if the first transmitter failure, launch unit and enter the second redundant state, if the second transmitter failure, launch unit and enter the third redundant state;
When launching unit and being in the second redundant state, if the second transmitter failure, launch unit and enter the 4th kind of redundant state, if the 3rd transmitter failure, launch unit and enter the first redundant state;
When launching unit and being in the third redundant state, if the first transmitter failure, launch unit and enter the 5th kind of redundant state, if the 3rd transmitter failure, launch unit and enter the first redundant state;
When launching unit and being in the 4th kind of redundant state, if the first transmitter failure, launch unit and enter the second redundant state, if the 3rd transmitter failure, launch unit and enter the 6th kind of redundant state;
When launching unit and being in the 5th kind of redundant state, if the second transmitter failure, launch unit and enter the third redundant state, if the 3rd transmitter failure, launch unit and enter the 6th kind of redundant state;
When launching unit and being in the 6th kind of redundant state, if the first transmitter failure, launch unit and enter the 5th kind of redundant state, if the second transmitter failure, launch unit and enter the 4th kind of redundant state.
5. digital television transmitting device redundancy approach according to claim 4, is characterized in that,
When operating emission machine fault, control operating emission machine and quit work: control operating emission office and close, cut off the radiofrequency signal of this fail operation transmitter; Standby transmitter is switched to operating emission machine: control standby transmitter-on simultaneously, set operating frequency and the modulating mode of this standby transmitter, there is provided programme signal to this standby transmitter, this standby transmitter exports radiofrequency signal, and described radiofrequency signal is sent by transmitting antenna.
6. digital television transmitting device redundancy approach according to claim 5, is characterized in that,
Adopt a system controller to dispatch according to the operating state of operating emission machine and control transmitter each transmitter work or standby in group, thus changing the redundant state of launching unit;
Control one by described system controller and switch switches set, the RF signal output of operating emission machine is coupled to a multiplexer;
The radiofrequency signal that operating emission machine exports is synthesized a road signal and is gone out by transmission antennas transmit by multiplexer.
7. digital television transmitting device redundancy approach according to claim 6, is characterized in that, described diverter switch group comprises 3 four port dpdt double-pole double-throw (DPDT) coaxial triggers;
First port of the first coaxial trigger is connected with the RF signal output of the first transmitter launched in unit, second port of the first coaxial trigger is connected with the first port of the second coaxial trigger, 3rd port of the first coaxial trigger is connected with the RF signal output launching the second transmitter in unit, and the 4th port of the first coaxial trigger is connected with the first port of the 3rd coaxial trigger;
Second port of the second coaxial trigger is connected with the 3rd port of the 3rd coaxial trigger, 3rd port of the second coaxial trigger is connected with the RF signal output of the 3rd transmitter launching unit, and the 4th port of the second coaxial trigger is connected with the second frequency input of multiplexer;
Second port of the 3rd coaxial trigger is connected to dummy load; 4th port of the 3rd coaxial trigger is connected with the first frequency input of multiplexer;
The strobe state of each coaxial trigger comprises two kinds, and the first strobe state is that the first port and the second port are connected and the 3rd port and the 4th port are connected; The second strobe state is that the first port and the 4th port are connected and the second port and the 3rd port are connected;
Wherein, the first coaxial trigger is the second strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the first redundant state;
First coaxial trigger is the second strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the first strobe state, launches unit and be in the second redundant state;
First coaxial trigger is the second strobe state, and the second coaxial trigger is the first strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the third redundant state;
First coaxial trigger is the first strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the first strobe state, launches unit and be in the 4th kind of redundant state;
First coaxial trigger is the first strobe state, and the second coaxial trigger is the first strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the 5th kind of redundant state;
First coaxial trigger is the first strobe state, and the second coaxial trigger is the second strobe state, and when the 3rd coaxial trigger is the second strobe state, launches unit and be in the 6th kind of redundant state.
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| CN106791515B (en) * | 2017-02-23 | 2019-12-24 | 苏州全波通信技术有限公司 | Intelligent switching system for main and standby transmitters of digital television transmitter and implementation method thereof |
| CN112995659B (en) * | 2021-04-14 | 2021-08-10 | 成都凯腾四方数字广播电视设备有限公司 | Intelligent ground digital television broadcast single frequency network networking coverage monitoring system |
| JPWO2023021798A1 (en) * | 2021-08-17 | 2023-02-23 | ||
| CN115378464B (en) * | 2022-08-12 | 2023-08-15 | 江苏德是和通信科技有限公司 | Main and standby machine synthesis switching system of transmitter |
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Denomination of invention: Terrestrial digital television broadcasting redundancy transmitting device and redundancy method Effective date of registration: 20160728 Granted publication date: 20150429 Pledgee: Agricultural Bank of China Limited by Share Ltd Chengdu Qingyang branch Pledgor: Chengdu Kaitengsifang Sifang Digital Broadcast & Television Equipment Co., Ltd. Registration number: 2016510000037 |
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