CN103457656A - Network management channel implementation system suitable for wireless optical fiber covering system - Google Patents
Network management channel implementation system suitable for wireless optical fiber covering system Download PDFInfo
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- CN103457656A CN103457656A CN2012101837122A CN201210183712A CN103457656A CN 103457656 A CN103457656 A CN 103457656A CN 2012101837122 A CN2012101837122 A CN 2012101837122A CN 201210183712 A CN201210183712 A CN 201210183712A CN 103457656 A CN103457656 A CN 103457656A
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Abstract
The invention provides a network management channel implementation system suitable for a wireless optical fiber covering system. The network management channel implementation system comprises near-end monitoring, far-end monitoring, a near-end protocol processing unit, a far-end protocol processing unit, a near-end frequency-shift keying modulator, a far-end frequency-shift keying modulator, a coupler, a laser, a detector and an amplifier. The near-end monitoring and the far-end monitoring are used for sending and receiving monitor data, the near-end protocol processing unit and the far-end protocol processing unit are used for carrying out protocol processing on the monitor data, and the near-end frequency-shift keying modulator and the far-end frequency-shift keying modulator modulate the monitor data through the protocol processing into radio-frequency signals or demodulate the received radio-frequency signals into the monitor data through the protocol processing. The radio-frequency signals are coupled to the laser through the coupler and are converted into optical signals to be sent out. After the optical signals are converted into electric signals through the detector, the electric signals are amplified through the amplifier. According to the network management channel implementation system, the data transmitted in a monitoring channel are guaranteed through reliable protocol processing, and the reliability of the monitoring channel can be guaranteed.
Description
Technical field
The present invention relates to the technology for radio frequency field, be specifically related to a kind of system that realizes that is applicable to the high reliability network management path of wireless optical fiber coverage system.
Background technology
Existing mobile communication system, particularly in the monitor mode of optical fiber direct amplification covering system, great majority adopt common frequency shift keying (FSK) monitor channel to be monitored: in this mode, the data of transmitting in monitor channel are simple, there is no the assurance of reliable protocol processes, the reliability of the passage provided can not guarantee, in the system of one-to-one, application is all right, for one, drag many application very unstable, the situation that monitoring is obstructed often appears, and the communication chip of this kind of monitor mode majority is selected CC1000 or NRF905 at present, also has other drawbacks:
1, CC1000 chip production technique is comparatively original, encapsulation and integrationization is lower, need to be equipped with huge peripheral circuit, and the stability degree of dependence to peripheral circuit is very high, often because the normal fluctuation of peripheral circuit performance and operation irregularity, cause monitoring packet loss, monitor obstructedly, even whole supervisory control system lost efficacy.In the severe applied environment such as high low temperature, performance more obvious, the stability of communication can't be protected.
2, the local oscillation power of NRF905 chip own is larger, in when work, can produce very high spuiously, affects whole communication system, and in data handling procedure, the transmitting-receiving byte data is fixed, and must adopt complicated data processor system, applies extremely dumb.
3, tradition adopts the scheme of the communication chips such as CC1000 or NRF905, and the transfer of data maximum rate is no more than 100kbps, needs the system of high speed data transfer to lack effective monitoring scheme.
The present situation of current monitor channel, the problem incidence is very high, and can not find in time, is easy to cause the interruption of communication system, brings very large inconvenience to the use of operator.System integrator need be equipped with complicated monitoring and protection mechanism, and monitor state is inquired about, or directly set up standby monitor channel, whole system design redundancy, cost is very high.
Therefore, strong supervisory control system of reliability of necessary proposition, the data that can not only make to transmit in monitor channel obtain the assurance of reliable protocol processes, also can make the reliability of monitor channel be guaranteed.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of network management path that is applicable to wireless optical fiber coverage system to realize system, and to improve the reliability of monitor channel, and the data that make to transmit in monitor channel obtain the assurance of reliable protocol processes.
The invention provides a kind of novel network management path that is applicable to wireless optical fiber coverage system and realize system, comprising: near-end monitoring and remote monitoring, for sending and receive monitor data; Near-end protocol processes and remote protocol processing unit, for carrying out protocol processes to described monitor data; Near-end FSK modulator and far-end FSK modulator, will be modulated into radiofrequency signal and maybe the described radiofrequency signal received will be demodulated into to described monitor data after protocol processes through the described monitor data after protocol processes; Coupler and laser, described radiofrequency signal is coupled to described laser and is converted to light signal through described coupler and sends; Detector and amplifier, described light signal, after described detector is converted to the signal of telecommunication, then amplifies and processes through described amplifier.
Wherein, when described near-end monitoring is transmitted described monitor data with described remote monitoring, described near-end protocol processing unit and described remote protocol processing unit revert to described monitor data according to the protocol encapsulation framing or by the frame after described encapsulation according to agreement by described monitor data.The structure of described frame comprises: the first separation code, lead code, the second separation code, frame head, frame definition, data, verification, postamble and the 3rd separation code, the 3rd separation code is 4 bytes.
The modulation circuit communication chip of described near-end FSK modulator and described far-end FSK modulator adopts CC1101 to comprise: the clock source unit, for described modulation circuit provides clock source; The modulation /demodulation frequency cells is provided, the frequency shift keyed modulation /demodulation frequency of output input is provided; Single-ended transmission antenna unit is provided, the shift keying modulation signal is sent; Single-ended reception antenna element is provided, receives the shift keying modulation signal that needs demodulation.
From above technical scheme, the present invention compares with existing supervisory control system, has following advantage:
1, high integration: the present invention becomes one the FSK communication technology, FSK Control on Communication, software protocol equal altitudes, has realized that a module completes the function of a plurality of modules.The application Intelligent RF optical transmission module, the FSK module that optical fiber repeater will no longer need, FSK control module etc., fundamentally simplify structure and the production of optical fiber repeater.
2, high reliability: the reliable FSK monitor channel that this programme is realized has increased the automatic calibration bucking-out system, degree of dependence decrease to peripheral circuit, make radio-frequency light transmission module under the extreme condition of high temperature and light decay, in the very large situation of peripheral circuit performance inconsistency, monitor channel still can work, and makes optical fiber repeater all the time in slave mode.
3, highly compatible: this programme is by the control and management of intelligent network management passage.By private communication protocol and frame structure, can realize that optical fiber repeater is point-to-point, the group-net communication of point-to-multipoint and control, compatible with monitoring schemes such as original CC1000, NRF905, can realize interconnecting.
4, high transfer rate: this programme can be supported the speed of maximum 500kbps, and more original monitoring scheme has the advantage of obvious message transmission rate, can support most high speed monitor channels.
5, high flexibility: support 2FSK, GFSK, the more modulation forms such as MFSK, OOK, message transmission rate is able to programme, and the packet guidance system is configurable, and range of application is wider, and the application means are more flexible.
The accompanying drawing explanation
Fig. 1 is the first enforcement theory diagram (full duplex) that the network management path that is applicable to wireless optical fiber coverage system of the present invention is realized system.
Fig. 2 realizes second of system for this network management path that is applicable to wireless optical fiber coverage system of the present invention and implements theory diagram (half-duplex).
Fig. 3 is the frame assumption diagram that protocol processing unit of the present invention encapsulates data.
Fig. 4 is the hardware elementary diagram that network management path of the present invention is realized the FSK modulator-demodulator in system.
Fig. 5 is the circuit theory diagrams that network management path of the present invention is realized the FSK modulator-demodulator in system.
In figure, illustrate:
Fig. 1 and Fig. 2 are respectively the theory diagram under full duplex mode of operation of the present invention and half-duplex mode of operation, wherein solid arrow
the signal of representative flows to as the data transmission procedure from the near-end to the far-end, wherein empty arrow
it is from distal-to-proximal data transmission procedure that the signal of representative flows to.
Embodiment
Below we in connection with accompanying drawing, optimum implementation of the present invention is described in detail.
At first it is to be noted, the implication of the term of using in the present invention, words and claim can not only only limit to its literal and common implication and go to understand, the implication and the concept that also comprise and then conform to technology of the present invention, this is because we are as the inventor, to suitably provide the definition of term, in order to our invention is carried out to the most appropriate description.Therefore, the configuration provided in this explanation and accompanying drawing, be first-selected embodiment of the present invention, rather than will enumerate all technical characteristics of the present invention.We will recognize to also have various equivalent scheme or the modifications that can replace our scheme.
Because the data transfer mode between radio-frequency light transmission module of the present invention can adopt full duplex and two kinds of patterns of half-duplex, with two kinds of patterns, the system that realizes to network management path of the present invention describes respectively now.
At first, refer to Fig. 1.Fig. 1 is the first enforcement theory diagram of the present invention.What this embodiment adopted is full-duplex mode.Near-end monitoring 1 is joined with near-end protocol processing unit 3, and the data that near-end monitoring 1 is transferred to remote monitoring by needs are sent to near-end protocol processing unit 3, near-end protocol processing unit 3 by these data according to the protocol encapsulation framing; Near-end protocol processing unit 3 is joined with near-end FSK modulator 4, and near-end protocol processing unit 3 sends to the frame after encapsulation near-end FSK modulator 4 and is modulated to radiofrequency signal by near-end FSK modulator 4; Near-end coupler 5 joins with near-end FSK modulator 4 and near-end laser 6 respectively, and radiofrequency signal is coupled to near-end laser 6 and is converted to light signal through near-end coupler 5, and light signal arrives far-end through Optical Fiber Transmission.Far-end detector 7 joins with far-end amplifier 8, and far-end detector 7 is converted to the signal of telecommunication by the light signal received and sends into far-end amplifier 8 and amplify processing; Far-end fsk demodulator 9 joins with far-end amplifier 8, and the signal after amplifying processing is sent into far-end fsk demodulator 9 and carried out demodulation; Remote protocol processing unit 10 joins with far-end fsk demodulator 9 and remote monitoring 2 respectively, and the data message after demodulation is sent into remote protocol processing unit 10 and carried out protocol processes, then the data that will recover through protocol processes send to remote monitoring 2.By remote monitoring 2 element required to near-end monitoring 1 transmission data and annexation thereof and near-end to far-end transmit required element and annexation identical, it should be noted that, because the system in the present embodiment is transmitted data with full-duplex mode, so near-end FSK modulator 4 works in modulating mode with 11 of far-end FSK modulators, far-end fsk demodulator 9 works in demodulation modes with 12 of near-end fsk demodulators.
Below the system that adopts semiduplex mode work is described.Refer to Fig. 2, Fig. 2 is the second enforcement theory diagram of the present invention.Near-end monitoring 1 is joined with near-end protocol processing unit 3, and the data that near-end monitoring 1 is transferred to remote monitoring by needs are sent to near-end protocol processing unit 3, near-end protocol processing unit 3 by these data according to the protocol encapsulation framing; Near-end protocol processing unit 3 is joined with near-end FSK modulator-demodulator 4, and near-end protocol processing unit 3 sends to the frame after encapsulation near-end FSK modulator-demodulator 4 and is modulated to radiofrequency signal by near-end FSK modulator-demodulator 4; Near-end coupler 5 joins with near-end FSK modulator-demodulator 4 and near-end laser 6 respectively, and radiofrequency signal is coupled to near-end laser 6 and is converted to light signal through near-end coupler 5, and light signal arrives far-end through Optical Fiber Transmission.Far-end detector 7 joins with far-end amplifier 8, and far-end detector 7 is converted to the signal of telecommunication by the light signal received and sends into far-end amplifier 8 and amplify processing; Far-end FSK modulator-demodulator 9 joins with far-end amplifier 8, and the signal after amplifying processing is sent into far-end FSK modulator-demodulator 9 and carried out demodulation; Remote protocol processing unit 10 joins with far-end FSK modulator-demodulator 9 and remote monitoring 2 respectively, and the data message after demodulation is sent into remote protocol processing unit 10 and carried out protocol processes, then the data that will recover through protocol processes send to remote monitoring 2.By remote monitoring 2 element required to near-end monitoring 1 transmission data and annexation thereof and near-end to far-end transmit required element and annexation identical, it should be noted that, because the mode of transmitting data is semiduplex mode, so when near-end monitoring 1 is transmitted data to remote monitoring 2, near-end FSK modulator-demodulator 4 works in respectively the modulation and demodulation pattern with far-end FSK modulator-demodulator 9, when remote monitoring 2 transmits data to near-end monitoring 1, far-end FSK modulator-demodulator 9 works in respectively the modulation and demodulation pattern with near-end FSK modulator-demodulator 4.
Data that protocol processing unit sends monitoring unit have been mentioned respectively according to the protocol encapsulation framing in above-mentioned two embodiment.Below the structure of frame described.
The software frame assumption diagram that Fig. 3 is implementation of the present invention, to the digitized representation corresponding codewords length below frame assumption diagram, for example first, second separation code is 2 bytes, the 3rd separation code is 4 bytes, for code word or lead code and the frame of separating mess code and transmitting, this separation code is generally used " 0xFF ", lead code is for providing the code word of electrical level judging to demodulation, general use " 0x55 " or " 0xAA ", frame head, frame definition, data, verification, the actual frame of postamble for transmitting, frame head, postamble is divided into 1 byte, can adopt special definition character, frame definition is the function declaration to these frame data, can comprise frame length, frame type etc., data are the data block that actual needs transmits, 2 bytes of verification, can adopt CRC check.
Due to the FSK modulator-demodulator as one of critical component of the present invention, so be necessary the FSK modulator-demodulator is described further.
Fig. 4 and Fig. 5 are respectively hardware elementary diagram and the circuit theory diagrams of FSK modulator-demodulator of the present invention.
In Fig. 4, be the scheme of employing CC1101 as FSK modulating/demodulating chip.This modulation circuit comprises the clock source unit, for described modulation circuit provides clock source; The modulation /demodulation frequency cells is provided, the frequency shift keyed modulation /demodulation frequency of input and output is provided; Single-ended transmission antenna unit is provided, the shift keying modulation signal is sent; Single-ended reception antenna element is provided, receives the shift keying modulation signal that needs demodulation.
As shown in Figure 5: chip U1 (CC1101) is the modulation /demodulation frequency cells; Capacitor C 2, C3, crystal Y1 (26MHz) and chip U1 (CC1101) form a resonant circuit, for chip U1 (CC1101) provides the clock signal of 26MHz, provide the clock source of a low frequency; Capacitor C 6 and inductance L 1 form the single-ended transmission antenna unit of 50 ohmages; Capacitor C 5 and inductance L 2 form the single-ended reception antenna element of 50 ohmages;
Under emission mode, protocol processing unit is sent signal to be modulated, be input to the modulation /demodulation frequency cells via pin GDO0, the modulation /demodulation frequency cells is according to input signal " GDO0 ", and (frequency centered by F0 can be 433MHz to export the frequency F0+Fsep of a correspondence or F0-Fsep, can be also 868MHz, Fsep is frequency deviation), be emitted to the emission coupling unit by single-ended transmission antenna unit, complete shift keying modulation and the emission of data.
Under receiving mode, provide a local frequency F1 (F1=F0-IF by the modulation /demodulation frequency cells, the intermediate frequency that IF is receiving demodulation), signal to be demodulated enters the modulation /demodulation frequency cells via single-ended reception antenna element and carries out demodulation, and the modulation /demodulation frequency cells exports the signal after demodulation to protocol processing unit by pin GDO2.
As Fig. 5:
The pin function explanation:
Pin 1:SCLK clock input interface
Pin 2:SO (GDO1) serial data output interface
Pin 3:GDO2 clock output interface or data output interface
Pin 4:DVDD digital power input interface
Pin 5:DCOUPL digital power output interface
Pin 6:GDO0 Data Input Interface
Pin 7:CSn chip selection enables interface
Pin 8:XOSC_Q1 crystal oscillator pin or external clock input interface
Pin 9:AVDD analog power input interface
Pin 10:XOSC_Q1 crystal oscillator pin
Pin 11:AVDD analog power input interface
Pin 12:RF_P radiofrequency signal input/output interface
Pin 13:RF_N radiofrequency signal input/output interface
Pin 14:AVDD analog power input interface
Pin 15:AVDD analog power input interface
Pin 16:GND ground connection
The external bias resistance interface of pin 17:RBIAS reference current
Pin 18:DGUARD digital power input interface
Pin 19:GND ground connection
Pin 20:SI serial data input interface
In sum, the present invention is owing in original unsteered FSK network management path, having added hardware controls and software protocol, the operating efficiency of hardware is provided, the reliability of transmission further is provided, and the system that realizes of the network management path of the high reliability proposed in the radio-frequency light transmission module under wireless optical fiber coverage system has reached or has surpassed world level.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. the network management path that is applicable to wireless optical fiber coverage system is realized system, it is characterized in that comprising:
Near-end monitoring and remote monitoring, for sending and receive monitor data; Near-end protocol processing unit and remote protocol processing unit, for carrying out protocol processes to described monitor data; Near-end FSK modulator and far-end FSK modulator, will be modulated into radiofrequency signal and maybe the described radiofrequency signal received will be demodulated into to described monitor data after protocol processes through the described monitor data after protocol processes; Coupler and laser, described radiofrequency signal is coupled to described laser and is converted to light signal through described coupler and sends; Detector and amplifier, described light signal, after described detector is converted to the signal of telecommunication, then amplifies and processes through described amplifier; When described near-end monitoring is transmitted described monitor data with described remote monitoring, described near-end protocol processing unit and described remote protocol processing unit revert to described monitor data according to the protocol encapsulation framing or by the frame after described encapsulation according to agreement by described monitor data;
The modulation circuit communication chip of described near-end FSK modulator and described far-end FSK modulator adopts CC1101 to comprise: the clock source unit, for described modulation circuit provides clock source; The modulation /demodulation frequency cells is provided, the frequency shift keyed modulation /demodulation frequency of output input is provided; Single-ended transmission antenna unit is provided, the shift keying modulation signal is sent; Single-ended reception antenna element is provided, receives the shift keying modulation signal that needs demodulation.
2. the network management path that is applicable to wireless optical fiber coverage system as claimed in claim 1 is realized system, it is characterized in that, when described near-end monitoring unit and described remote monitoring unit transmit described monitor data, described near-end protocol processing unit and described remote protocol processing unit revert to described monitor data according to the protocol encapsulation framing or by the frame after described encapsulation according to agreement by described monitor data.
3. want the 1 described network management path that is applicable to wireless optical fiber coverage system as right and realize system, it is characterized in that, the structure of described frame comprises: the first separation code, lead code, the second separation code, frame head, frame definition, data, verification, postamble and the 3rd separation code, the 3rd separation code is 4 bytes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108053636A (en) * | 2017-12-31 | 2018-05-18 | 东莞留云榭软件科技有限公司 | A kind of distant signal transmission system |
| CN110620743A (en) * | 2018-06-19 | 2019-12-27 | 意法半导体发展有限责任公司 | Integrated circuit and method for protocol detection and decoding in near field communication |
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