CN102448201B - Home gateway system based on fiber radio integration access - Google Patents

Home gateway system based on fiber radio integration access Download PDF

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CN102448201B
CN102448201B CN201110288637.1A CN201110288637A CN102448201B CN 102448201 B CN102448201 B CN 102448201B CN 201110288637 A CN201110288637 A CN 201110288637A CN 102448201 B CN102448201 B CN 102448201B
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signal
optical
carrier
input
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CN102448201A (en
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张崇富
罗洪彬
陈晨
邱昆
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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Abstract

The invention discloses a home gateway system based on fiber radio integration access, which integrates a radio over fiber technology, a millimeter wave radio transmission technology, an embedded technology and a fiber-to-the-desk technology. The home gateway system consists of a central station, a fiber link, a home gateway end and terminal equipment, wherein uplink and downlink light carrier signals are transmitted between the central station and the home gateway end through a standard single mode fiber; and signals are transmitted between the home gateway end and the terminal equipment by adopting fiber-to-the-desk, wired, WIFI (Wireless Fidelity) and millimeter way modes. In the invention, regenerations of the light carrier signals are concentrated on the central station end, and the home gateway only realizes photoelectric conversion; meanwhile, transmission of the uplink and downlink signals and management of multiple channels between the home gateway end and the terminal equipment through the fiber-to-the-desk, wired, WIFI and millimeter wave ways are realized.

Description

A kind of home gateway system that merges access based on optical-fiber wireless
Technical field
The invention belongs to optical fiber radio communication technical field, more specifically say, relate to a kind of home gateway system that merges access based on optical-fiber wireless.
Background technology
Along with the development of broadband access technology and the Internet, the numerous and complicated that also thereupon becomes of the integrated service in home network.As emerging in large numbers of the multiple family network services such as HD video program request, digital TV in high resolution, video conference, high-quality Long-distance Control and management, Access Network is had higher requirement, these require to be not only embodied in high-throughput, strict service quality (QoS) and reliable internet security, but also are embodied in the aspects such as bandwidth, networking flexibility, network administration cost of Access Network.Optical fiber access technology can solve the problems such as bandwidth and loss of signal and wireless access technology can meet flexible networking and the requirement of user to " mobility ", and the expert of industrial quarters and academia and scholar mostly think that optical fiber access technology and wireless access technology will move towards to merge in following broadband access network.
Home gateway based on optical-fiber wireless Access Network is that home network is seamlessly connected to broadband network, is that the inline equipment of all families is enjoyed the equipment connecting at a high speed simultaneously.Home gateway is a kind of intelligence, standardized, home network interface unit flexibly, can receive communication signal from different external networks, by home network transmission of signal, carry out control and management intelligent home network equipment.Home gateway is the requirement to the requirement of bandwidth, security requirement and networking flexibility according to home network device, adopts wired and wireless and two-forty and flexible management control and the home network environment monitoring in conjunction with realizing home network device of low rate.
In home gateway exploitation, as disclosed on October 18th, 2006, publication number is CN1848826, the Chinese invention patent prospectus that name is called " family gateway equipment " discloses a kind of family gateway equipment, although in this invention, adopt centralized control reduce the intelligentized requirement of household electrical appliances and adopt preset strategy to control the Ethernet information of up-downgoing, but in the high speed broadband service access of home gateway and Based Intelligent Control Shortcomings still, cost is also higher.
At list of references [Shuang Wu, Gui-gen Zeng, " Design and Realization of Wireless Home Gateway Based on 3G and Zigbee ", 2010international conference on multimedia communications, Hong Kong, China, pp.157-160, Aug.7-8, 2010] in, propose to adopt 3G technology, ZigBee technology is developed intelligent wireless home gateway with embedded development platform, realize the management to intelligent home network flexibly and easily and without wiring, but its maximum downstream rate is 7.2Mbps, maximum upstream rate is 5.76Mbps, its transmission rate can not meet the requirement of home network integrated service development far away.
At list of references [Arshad Chowdhury, Hung-Chang Chien, Yu-Ting Hsueh, and Gee-Kung Chang, " Advanced System Technologies and Field Demonstration for In-Building Optical-Wireless Network With Integrated Broadband Services ", Journal of lightwave technology, Vol.27, No.12, pp.1920-1927, Jun.2009] in adopt ROF technology to realize 60GHz, WIFI and WiMax wireless technology, effectively raise the bandwidth of Radio Transmission Technology, solved the limit bandwidth problem of Radio Transmission Technology, but the signal controlling of this gateway, regeneration and route are all held at central station (CS), in this technical scheme, gateway route only demodulates radiofrequency signal and goes out by antenna transmission, to entering the signal of home network, do not process, so home gateway user can not manage easily the running status of controlling home network device and checking home network device by home gateway in home network, and, this scheme has also only realized the transmission of downstream signal.Obvious this can not meet man-machine interactive management control, user in home network and facilitate intelligent management to control the requirements such as development of intelligent home network and environmental monitoring.Secondly, in optical-fiber wireless Access Network, due to the simplification of base station end structure and the reduction of cost, the networking mode of optical-fiber wireless Access Network is developed to Pico cell, so WiMax wireless technology be not suitable for the communication of WLAN (wireless local area network).
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of cost low, can carry out the transmission of upstream and downstream signal, what a plurality of channels were managed merges the home gateway system of access based on optical-fiber wireless.
For achieving the above object, the present invention is based on the home gateway system that optical-fiber wireless merges access, comprise central station end and home gateway end, it is characterized in that:
1, central station end comprises descending light carrier generation device, downlink data modulating device, up light carrier generation device, upstream data demodulating equipment, equalizer, array waveguide grating and erbium-doped fiber amplifier;
Descending light carrier generation device is comprised of a continuous wavelength laser, optical phase modulator, cosine signal source, Frequency reuser, electric amplifier and the erbium-doped fiber amplifier of 1:4, array waveguide grating that frequency is fs; The continuous light wave input optical phase modulator that it is f that continuous wavelength laser produces frequency, cosine signal source output frequency is f scosine signal to the Frequency reuser of 1:4, to produce frequency be 4f scosine signal as the driving signal of optical phase modulator, it is f-8f that optical phase modulator produces frequency s, f-4f s, f, f+4f s, f+8f smixed light carrier signal; Mixed light carrier signal is after erbium-doped fiber amplifier amplifies, and at array waveguide grating, isolating frequency is f-8f s, f-4f s, f, f+4f s, f+8f sthe descending optical carrier in Wu road;
Downlink data modulating device is comprised of a coupler and four light intensity modulators; Frequency is f-4f s, f+4f sthe descending optical carrier of two-way in coupler, be coupled as a road mixed carrier signal and be input to a light intensity modulator Zhong， mono-road downlink data and modulate as modulation signal Dui Gai road mixed carrier signal; Frequency is f-8f s, f+8f sand the other three descending optical carriers in tunnel of f are input to respectively in other three light intensity modulators, descending family network management control signal data, fiber to the desk data and WIFI data respectively as the modulation signal of other three light intensity modulators to f-8f s, f+8f sand the descending optical carrier in f San road is modulated;
Up light carrier generation device is f by a continuous wavelength laser, optical phase modulator, frequency sfrequency reuser, electric amplifier and erbium-doped fiber amplifier, the array waveguide grating of cosine signal source, 1:4 form; The continuous light wave input optical phase modulator that it is F that continuous wavelength laser produces frequency, cosine signal source output frequency is f scosine signal to the Frequency reuser of 1:4, to produce frequency be 4f scosine signal as the driving signal of optical phase modulator, it is F-8f that optical phase modulator produces frequency s, F-4f s, F, F+4f s, F+8f smixed light carrier signal; Mixed light carrier signal is after erbium-doped fiber amplifier amplifies, and at array waveguide grating, isolating frequency is F-8f s, F-4f s, F, F+4f s, F+8f sthe up optical carrier in Wu road;
Upstream data demodulating equipment is comprised of a coupler, four winding devices and four road optical demodulators; Frequency is F-4f s, F+4f sthe up optical carrier of two-way in coupler, be coupled as row mixed carrier signal on the way and be input to a winding device, then from winding device, output to equalizer, frequency is F-8f s, F+8f sand the other three road optical carriers of F are input to respectively other three winding devices, then from winding device, output to equalizer; The upstream data modulation Hou tetra-up light carriers in tunnel from equalizer are delivered to respectively in four road optical demodulators, demodulate upstream data;
Frequency after modulation is f-4f s, f+4f sdown mixing optical carrier, modulation after frequency be f-8f s, f+8f s, f descending optical carrier and frequency be F-4f s, F+4f sup mixed light carrier signal, frequency be f-8f s, f+8f s, f up optical carrier in equalizer, carry out, after power equalization, at array waveguide grating, carrying out signal multiplexing, and in erbium-doped fiber amplifier, carry out by standard single-mode fiber, being transferred to home gateway end after power amplification; The upstream data modulation Hou tetra-up light carriers in tunnel from home gateway end carry out, after separation, being transported in equalizer at array waveguide grating;
2, home gateway end comprises array waveguide grating, WIFI signalling, fiber to the desk DIU data interface unit, millimeter wave transceiving device and domestic network control device;
Array waveguide grating is f-4f by the frequency after the modulation from standard single-mode fiber s, f+4f s, f-8f s, f+8f s, f descending optical carrier and frequency be F-4f s, F+4f s, F-8f s, F+8f s, F up optical carrier separate;
WIFI signalling comprises descender and ascender, descender is comprised of photodetector, two electric amplifiers, multiplier, 2.4GHz local vibration source and transmitting paraboloids, descending optical carrier after WIFI Data Modulation demodulates WIFI data-signal in photodetector, then by an electric amplifier, carry out power amplification, the 2.4GHz local oscillation signal in WIFI data-signal input multiplier after amplifying, 2.4GHz local vibration source being produced is modulated, signal after modulation is inputted in another electric amplifier and is carried out power amplification, then by transmitting paraboloid, is transmitted to terminal equipment, ascender comprises receiving paraboloid, intermediate frequency modulator, erbium-doped fiber amplifier and winding device, receiving paraboloid receives the WIFI data-signal that the terminal equipment of 2.4GHz sends, the optical carrier of row on the way that array waveguide grating is separated outputs to intermediate frequency modulator through winding device, in intermediate frequency modulator, by the WIFI data that receive, up optical carrier is modulated, up optical carrier after modulation amplifies by erbium-doped fiber amplifier, then be input to winding device, winding device is exported to standard single-mode fiber to be transferred to central station end,
Fiber to the desk DIU data interface unit is comprised of coupler and optical port; Descending optical carrier after fiber to the desk Data Modulation is sent into optical port with the coupling of row optical carrier on the way in coupler, by optical port, fiber to the desk data and up optical carrier is sent to terminal equipment; Terminal equipment sends to standard single-mode fiber to be transferred to central station end the up light carrier after upstream data modulation by optical port, coupler;
Millimeter wave transceiving device comprises descender and ascender; Descender comprises coupler, photodetector, electric amplifier and rectangular horn antenna, and the frequency after modulation is f-4f s, f+4f sdescending optical carrier send into photodetector after being coupled realize beat frequency, output 8f in coupler smillimeter-wave signal, by electric amplifier, undertaken after power amplification, by rectangular horn antenna transmission to terminal equipment; Ascender comprises rectangular horn antenna, multiplier, coupler, winding device, 50:50 coupler, intermediate frequency modulator, photo-detector and erbium-doped fiber amplifier, and frequency is F-4f s, F+4f sthe up optical carrier of two-way at coupler, be coupled, optical carrier after coupling is input to winding device, and then outputs to the coupler of 50:50, and optical carrier is decomposed into two-way, one tunnel is input to intermediate frequency modulator, and another road signal is input to photodetector beat frequency and obtains 8f smillimeter wave, and this millimeter wave is input to multiplier, simultaneously by by rectangular horn antenna reception to frequency be 8f s+ f imillimeter wave data-signal be input to multiplier and carry out mixing, after mixing, output frequency is f iupstream data. signals and be input to intermediate frequency modulator, being modulated to frequency is F-4f s, F+4f sthe up optical carrier of two-way on, the frequency after intermediate frequency modulator output modulation is F-4f s, F+4f sthe up optical carrier of two-way by erbium-doped fiber amplifier, carry out power amplification, the signal after amplification is input to winding device, from winding device, sends to coupler, by coupler, sends to standard single-mode fiber to be transferred to central station end;
Domestic network control device comprises optical modem and domestic network control interface; With the descending optical carrier of family network management control signal Data Modulation, in optical modem, carry out demodulation, the family network management control signal data that demodulate are sent into domestic network control interface, by domestic network control interface, send to terminal equipment, the upstream data that terminal equipment sends sends to optical modem to modulate with row light carrier on the way by domestic network control interface, and the up light carrier after modulation sends to standard single-mode fiber to be transferred to central station end.
Goal of the invention of the present invention is achieved in that
The home gateway system that the present invention is based on optical-fiber wireless fusion access has merged light carrier radio communication (ROF, Radio Over Fiber) technology, millimeter wave Radio Transmission Technology, embedded technology and fiber to the desk technology.Wherein ROF technology is the major technique of optical-fiber wireless access, and its composition comprises that central station (CS, Center Station), optical fiber link, home gateway end and terminal equipment four parts form.Between central station and home gateway end, with standard single-mode fiber, transmit upstream and downstream optical carrier, between home gateway end and terminal equipment, adopt fiber to the desk, wired, WIFI and millimeter wave mode signal transmission.Adopting the great advantage of ROF technology is greatly to improve the bandwidth of Radio Transmission Technology, has solved the Bandwidth-Constrained problem that existing home network occurs because of integrated service development.The regeneration of optical carrier in the present invention all concentrates on central station end, and home gateway end is only realized opto-electronic conversion, and home gateway end has not only reduced power consumption and cost like this, utilizes optical fiber transmission signal to reduce the loss of signal and prevented electromagnetic interference etc. simultaneously.Due to the simplification of home gateway end, with low cost and be easy to networking that the advantages such as installation make Access Network more flexibly and fail safe better.In addition, the upstream data that the present invention is based on the home gateway system self terminal equipment in future of optical-fiber wireless fusion access is modulated the up-link carrier from central station end, thereby realized the transmission of upstream and downstream signal, the management of a plurality of passages of fiber to the desk between home gateway end and terminal equipment, wired, WIFI and millimeter wave mode.
Accompanying drawing explanation
Fig. 1 the present invention is based on a kind of embodiment theory diagram of home gateway system central station end that optical-fiber wireless merges access;
Fig. 2 is light carrier spectrogram; Wherein (a) is the spectrogram before descending light carrier modulated data signal, is (b) spectrogram after descending light carrier modulated data signal, is (c) spectrogram before up light carrier modulated data signal, (d) is the signal spectrum figure transmitting in optical fiber;
Fig. 3 the present invention is based on a kind of embodiment theory diagram of home gateway system home gateway end that optical-fiber wireless merges access;
Fig. 4 is the theory diagram of optical modem shown in Fig. 1;
Fig. 5 is a kind of embodiment theory diagram of the domestic network control interface shown in Fig. 3.
Fig. 6 is a business process map of home gateway system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.Requiring particular attention is that, in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these are described in here and will be left in the basket.
Embodiment
Fig. 1 the present invention is based on a kind of embodiment theory diagram of home gateway system central station end that optical-fiber wireless merges access.
As shown in Figure 1, in the present embodiment, central station end 1 comprises descending light carrier generation device 101, downlink data modulating device 102, up light carrier generation device 103, upstream data demodulating equipment 104, equalizer 105, array waveguide grating AWG3 and erbium-doped optical fiber amplifier EDFA 3;
Descending light carrier generation device 101 is f by continuous wavelength laser CW1, optical phase modulator PM1, a frequency sfrequency reuser FM1, the electric amplifier EA1 of cosine signal source S1, the 1:4 of=7.5GHz and erbium-doped optical fiber amplifier EDFA 1, array waveguide grating AWG1 form.The continuous light wave input optical phase modulator PM1 that it is f=193.1THz that continuous wavelength laser CW1 produces frequency,, cosine signal source S1 output frequency is f sthe cosine signal of=7.5GHz is 4f to the Frequency reuser FM1 generation frequency of 1:4 sbe the cosine signal of 30GHz as the driving signal of optical phase modulator, the spectrogram that optical phase modulator produces as shown in Figure 2 (a) shows, is respectively f-8f s, f-4f s, f, f+4f s, f+8f s, frequency is f-4f s, f+4f ssingle order double-side band light carrier f 11with f 12, frequency is f-8f s, f+8f ssecond order double-side band light carrier f 21with f 22with the frequency light carrier f that is f 0mixed light carrier signal; Mixed light carrier signal is after erbium-doped optical fiber amplifier EDFA 1 amplifies, and at array waveguide grating AWG1, isolating frequency is f-8f s, f-4f s, f, f+4f s, f+8f sthe descending optical carrier in Wu road, i.e. f 21, f 11, f 0, f 12, f 22.
As shown in Figure 1, in the present embodiment, downlink data modulating device 102 is comprised of a coupler CP1 and four light intensity modulator IM1～4; Frequency is f-4f s, f+4f sthe descending optical carrier f of two-way 11, f 12in coupler CP1, being coupled as a road mixed carrier signal is input to the downlink data D3 that light intensity modulator IM3 Zhong， mono-tunnel transmission speed is 3Gbps and modulates as modulation signal Dui Gai road mixed carrier signal.Frequency is f-8f s, f+8f sand the other three descending optical carriers in tunnel of f are input to respectively in other three light intensity modulators, descending family network management control signal data D4, fiber to the desk data D2 and WIFI data D1 respectively as the modulation signal of other three light intensity modulators to f-8f s, f+8f sand the descending optical carrier f in f San road 21, f 22and f 0modulate.Signal spectrum figure after modulation is as shown in Fig. 2 (b).Specifically, in the present embodiment, the family network management control signal data D4 that transmission speed is 4Mbps is to descending optical carrier f 21modulate, the fiber to the desk data D2 that transmission speed is 10Gbps is to descending optical carrier f 0modulate, the WIFI data D1 that transmission speed is 100Mbps is to descending optical carrier f 22modulate., before descending light carrier is modulated, amplify with electric amplifier EA3～6 respectively downlink data D1～4 in ，Si road in the present embodiment, the power requirement needing to reach modulation.
In the present embodiment, the composition of up light carrier generation device 103 is the same with descending light carrier generation device 101 with operation principle.By continuous wavelength laser CW2, optical phase modulator PM2, a frequency, be f sfrequency reuser FM2, the electric amplifier EA2 of cosine signal source S2, the 1:4 of=7.5GHz and erbium-doped optical fiber amplifier EDFA 2, array waveguide grating AWG2 form; The continuous light wave input optical phase modulator PM2 that it is F=193.115THz that continuous wavelength laser CW2 produces frequency, cosine signal source S2 output frequency is f sthe cosine signal of=7.5GHz is 4f to the Frequency reuser FM2 generation frequency of 1:4 sbe the cosine signal of 30GHz as the driving signal of optical phase modulator PM2, the frequent spectrogram that optical phase modulator PM2 produces as shown in Figure 2 (c), is respectively F-8f s, F-4f s, F, F+4f s, F+8f s, frequency is F-4f s, F+4f ssingle order double-side band light carrier F 11with F 12, frequency is f-8f s, f+8f ssecond order double-side band light carrier F 21with F 22with the frequency light carrier F that is F 0mixed light carrier signal; Mixed light carrier signal is after erbium-doped optical fiber amplifier EDFA 2 amplifies, and at array waveguide grating AWG2, isolating frequency is F-8f s, F-4f s, F, F+4f s, F+8f sthe up optical carrier in Wu road, i.e. F 21, F 11, F 0, F 12, F 22.
Upstream data demodulating equipment 104 is comprised of a coupler CP2, four winding device LB1～4 and four road optical demodulators; Frequency is F-4f s, F+4f sthe up optical carrier F of two-way 11with F 12in coupler, be coupled as 1 port that row mixed carrier signal is on the way input to winding device LB3, then from the signal of the 2 ports outputs of winding device LB3, be input to equalizer EQ and carry out power equalization, frequency is F-8f s, F+8f sand the other three road optical carrier F of F 21, F 22, F 0be input to respectively other three winding device LB4, LB1, LB2 1 port separately, the signal of then exporting from 2 ports of winding device LB4, LB1, LB2 is input to equalizer EQ and carries out power equalization; Upstream data F' from equalizer EQ 22, F' 0, F' 11and F' 12, F' 21be input to respectively LB1, LB2, LB3, LB4 2 ports separately of winding device, then exported by 3 ports, then Dui Si road upward signal carries out demodulation and obtains upstream data respectively.In the present embodiment, as shown in Figure 1, four road optical demodulator structures are identical, all by band pass filter BPF, to carry out bandpass filtering, photo-detector inspection PD to go out intermediate frequency upstream data, in low pass filter LPF, carry out low-pass filtering, output to intermediate-frequency receiver IFR, intermediate-frequency receiver IFR carries out demodulation, finally exports upstream data.
Frequency after modulation is f-4f s, f+4f sdown mixing optical carrier f 11, f 12, the frequency after modulation is f-8f s, f+8f s, f descending optical carrier f 21, f 22, f 0and frequency is F-4f s, F+4f sup mixed light carrier signal F 11, F 12, frequency is f-8f s, f+8f s, f up optical carrier F 21, F 22, F 0in equalizer EQ, carry out after power equalization, the signal after equilibrium is input to array waveguide grating AWG3 and carries out signal multiplexing, and the signal spectrum figure after multiplexing as shown in Figure 2 (d) shows.Signal after multiplexing is input in erbium-doped optical fiber amplifier EDFA 3 and carries out by standard single-mode fiber L, being transferred to home gateway end 2 after power amplification; The upstream data modulation Hou tetra-up light carrier F' in tunnel from home gateway end 2 22, F' 0, F' 11and F' 12, F' 21at array waveguide grating AWG3, carry out, after separation, being transported in equalizer EQ.
Fig. 3 the present invention is based on a kind of embodiment theory diagram of home gateway system home gateway end that optical-fiber wireless merges access.
As shown in Figure 3, in the present embodiment, home gateway end 2 comprises array waveguide grating AWG4, WIFI signalling 201, fiber to the desk DIU data interface unit 202, millimeter wave transceiving device 203 and domestic network control device 204.
Array waveguide grating AWG4 is f-4f by the frequency after the modulation from standard single-mode fiber L s, f+4f s, f-8f s, f+8f s, f descending optical carrier f 11, f 12, f 21, f 22, f 0and frequency is F-4f s, F+4f s, F-8f s, F+8f s, F up optical carrier F 11, F 12, F 21, F 22, F 0separate;
WIFI signalling comprises 201 descenders and ascender; Descender is comprised of photoelectric detector PD 1, two electric amplifier EA7, EA8, multiplier M1,2.4GHz local vibration source S3 and receiving paraboloid TA1.Descending optical carrier f after WIFI data D1 modulation 22in photoelectric detector PD 1, demodulate WIFI data D1 signal, then by electric amplifier EA7, carry out power amplification, the 2.4GHz local oscillation signal in WIFI data D1 signal input multiplier M1 after amplifying, 2.4GHz local vibration source S3 being produced is modulated, signal after modulation is inputted in another electric amplifier EA8 and is carried out power amplification, then by transmitting paraboloid TA1, is transmitted to terminal equipment.Ascender comprises receiving paraboloid RA1, intermediate frequency modulator IFM1, erbium-doped optical fiber amplifier EDFA 9 and winding device LB5, receiving paraboloid RA1 receives the WIFI data-signal that the terminal equipment of 2.4GHz sends, the optical carrier of row on the way that array waveguide grating is separated, i.e. F 22port one input from winding device LB5, outputs to intermediate frequency modulator IFM1 from port 2, in intermediate frequency modulator, uses the WIFI data that receive to up optical carrier F 22modulate the up optical carrier F' after modulation 22by erbium-doped optical fiber amplifier EDFA 9, amplify, be then input to winding device LB5 port 3, winding device port one is exported to standard single-mode fiber L to be transferred to central station end 1.
Fiber to the desk DIU data interface unit 202 is comprised of coupler CP3 and optical port; Descending optical carrier f after fiber to the desk Data Modulation 0cP3 and up optical carrier F in coupler 0coupling send into optical port, by optical port by fiber to the desk data and up optical carrier F 0send to terminal equipment; Up light carrier F' after terminal equipment is modulated upstream data by optical port, coupler CP3 0send to standard single-mode fiber L to be transferred to central station end 1.
Millimeter wave transceiving device 203 comprises descender and ascender; Descender comprises coupler CP4, photoelectric detector PD 2, electric amplifier EA9 and rectangular horn transmitting antenna TA2, and the frequency after modulation is f-4f s, f+4f sdescending optical carrier f 11, f 12in coupler CP4, after coupling, send into photoelectric detector PD 2 and realize beat frequency, output 8f s, 60GHz millimeter-wave signal, is undertaken after power amplification by electric amplifier EA9, and by rectangular horn transmitting antenna, TA2 is transmitted to terminal equipment.Ascender comprises rectangular horn reception antenna RA2, multiplier M2, coupler CP5, winding device LB6,50:50 coupler CP6, intermediate frequency modulator IFM2, photo-detector PD3 and erbium-doped optical fiber amplifier EDFA 11, and frequency is F-4f s, F+4f sthe up optical carrier F of two-way 11, F 12entering the capable coupling of coupler CP5, the optical carrier after coupling is input to the port one of winding device LB6, then by port 2, outputs to the coupler CP6 of 50:50, by optical carrier F again 11, F 12be decomposed into two-way ，Yi road and be input to intermediate frequency modulator IFM2, another road signal is input to photoelectric detector PD 3 beat frequencies and obtains 8f s, i.e. 60GHz millimeter wave, and this 60GHz millimeter wave is input to multiplier M2, by the frequency being received by rectangular horn reception antenna RA2, be 8f simultaneously s+ f i, the millimeter wave data-signal of 60GHz+2GHz is input to multiplier M2 and carries out mixing, and after mixing, output frequency is f ibe the upstream data. signals of 2GHz and be input to intermediate frequency modulator IFM2, being modulated to frequency is F-4f s, F+4f sthe up optical carrier F' of two-way 11, F' 12upper, the frequency after intermediate frequency modulator IFM2 output modulation is F-4f s, F+4f sthe up optical carrier F' of two-way 11, F' 12by erbium-doped fiber amplifier device, EDFA11 carries out power amplification, and the signal after amplification is input to the port 3 of winding device LB6, from the port one of winding device LB6, sends to coupler CP5, by coupler CP5, sends to standard single-mode fiber L to be transferred to central station end 1.
Domestic network control device 204 comprises optical modem 2041 and domestic network control interface 2042; Wherein 2041 specific implementations as shown in Figure 4.Up light carrier F 21be input to 1 port of winding device LB8, and then outputed in intermediate frequency modulator IFM3 by 2 ports of winding device LB8.Descending optical carrier f with family network management control signal Data Modulation 21the photo-detector PD7 being input in optical modem 2041 carries out demodulation, the family network management control signal data that demodulate are carried out power amplification by electric amplifier EA10, signal after amplification is input to 1 port of winding device LB7, and the data-signal input domestic network control interface 2042 of the 2 port outputs of winding device LB7, by domestic network control interface 2042, send to terminal equipment, the upstream data that terminal equipment sends sends to 2 ports of winding device LB7 in optical modem 2041 by domestic network control interface 2042, and then exported by 3 ports of winding device LB7, the signal of output is input to intermediate frequency modulator IFM3 intermediate-freuqncy signal is modulated to light carrier F 21upper, the signal after modulation carries out power amplification by erbium-doped optical fiber amplifier EDFA 12, and the signal after amplification is input to 3 ports of winding device LB8, and by the signal after 1 port output modulation, then by the up light carrier F' after modulation 21send to standard single-mode fiber L to be transferred to central station end 1.
Fig. 5 is a kind of embodiment theory diagram of the domestic network control interface shown in Fig. 3.
In the present embodiment, as shown in Figure 5, optical modem 2041 is by RJ45 interface and the embedded development platform S3C2440 based on ARM920T kernel, and domestic network control interface 2042 connects.
Terminal equipment comprises digital temperature sensor (TS-18B20), COMS camera (OV9650), 3.5 cun of very color tangible TFT LCDs, Ethernet card DM9000A.In addition domestic network control interface 2042 also comprises infrared remote receiver, bluetooth module, USB interface, AC97 audio interface and RS485 interface, to communicate with other equipment.64M SDRAM, 256M NAND Flash and 4M NOR Flash.Software platform comprises the (SuSE) Linux OS that employing is opened source code, and in the mode of file system, manages and controls intelligent home network equipment and monitoring home network environment.The light-duty database of SQLite is used for storing configuration parameter and the running status of home network device.Boa, as Web server, provides online service.In conjunction with hardware and software platform, realize following functions: the value that ceaselessly reads digital temperature sensor by moving corresponding script file regulates air-conditioning equipment and fire-fighting equipment automatically, thereby realize, indoor temperature regulates automatically and the automatic fire plant that starts; COMS camera (OV9650) is used for realizing the monitoring of home network environment.Thereby use Telnet telnet to realize Telnet home gateway and realize the monitoring to the control and management of home network device and home network environment.The tangible TFT LCDs that user can provide by S3C2440 be used for control and management home network device and monitoring home network environment.
Fig. 6 is a business process map of home gateway system of the present invention.
The present invention adopts WIFI wireless technology to meet existing video, data and speech business, realizes common computer and gets online without being tethered to a cable; For realizing High rate and large capacity radio communication, in the present embodiment, adopt 60GHz wireless technology to realize high definition uncompressed video business and large capacity business, thereby realize high-quality, the vision signal of low delay and the transmission of data-signal; For realizing the management control of home network device and the monitoring of environment, we adopt separately road light carrier transmission data.This road signal passes through the embedded development platform based on FL S3C2440, and with (SuSE) Linux OS, and by realizing Telnet business in conjunction with Telnet telnet.This embedded platform provides RJ45 interface for realizing business of networking, AC97 interface is used for realizing speech business, data service, USB2.0 interface, temperature sensor and the CMOS camera that RS485 serial ports and infrared transceiver are controlled for home network device management is for realizing security protection business and the environmental monitoring of home network, and LCD interface provides video traffic and graphic user interface; Fiber to the desk technology is in order to have realized the video that higher rate requires, the transmission of voice-and-data business, to have reduced again electromagnetic radiation the injury ，Gai road signal of human body is directly connected to device end by optical fiber simultaneously.Realize the communication of large capacity, low-loss and high security.
Beneficial effect of the present invention:
1, realized the intelligent home gateway that merges Access Network based on optical-fiber wireless, for place mat has been made in the R and D of following intelligent home gateway.
2, the present invention adopts ROF technology in gateway system, to realize WIFI, fiber to the desk technology and 60GHz wireless technology simultaneously, and this hardware implementation structure is simple, low in energy consumption and with low cost.Topmost advantage is the bandwidth that has greatly improved Radio Transmission Technology, by adopting 60GHz wireless technology to realize transfer of data more than Gbps, has solved the limit bandwidth problem producing because of integrated service development in home network.
3, user can use computer, mobile phone or other equipment for surfing the net, realizes Telnet control and management intelligent home network equipment and monitoring home network environment.
4,, by the value of Real-time Collection temperature sensor, air-conditioning equipment, security device and the fire plant in the automatic control of realization home network also reported to the police.Safer safety-protection system is provided.The present invention also provides high-definition camera OV9650, realizes monitoring home network environment in real time.
5, by realized the intelligent home network of environmental protection, safety and high bandwidth in conjunction with fiber to the desk technology.
6, the present invention adopts wired and wireless combining, the flexible combination of high low bandwidth channel, so the present invention is not only applicable to intelligent home network, is also applicable to the environment that office and workshop etc. need intelligent management control and monitoring.
Although above the illustrative embodiment of the present invention is described; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and definite the spirit and scope of the present invention in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.

Claims (3)

1. based on optical-fiber wireless, merge a home gateway system for access, comprise central station end and home gateway end, it is characterized in that:
1), central station end comprises descending light carrier generation device, downlink data modulating device, up light carrier generation device, upstream data demodulating equipment, equalizer, array waveguide grating and erbium-doped fiber amplifier;
Descending light carrier generation device is f by a continuous wavelength laser, optical phase modulator, frequency sfrequency reuser, electric amplifier and erbium-doped fiber amplifier, the array waveguide grating of cosine signal source, 1:4 form; The continuous light wave input optical phase modulator that it is f that continuous wavelength laser produces frequency, cosine signal source output frequency is f scosine signal to the Frequency reuser of 1:4, to produce frequency be 4f scosine signal as the driving signal of optical phase modulator, it is f-8f that optical phase modulator produces frequency s, f-4f s, f, f+4f s, f+8f smixed light carrier signal; Mixed light carrier signal is after erbium-doped fiber amplifier amplifies, and at array waveguide grating, isolating frequency is f-8f s, f-4f s, f, f+4f s, f+8f sthe descending optical carrier in Wu road;
Downlink data modulating device is comprised of a coupler and four light intensity modulators; Frequency is f-4f s, f+4f sthe descending optical carrier of two-way in coupler, be coupled as a road mixed carrier signal and be input to a light intensity modulator Zhong， mono-road downlink data and modulate as modulation signal Dui Gai road mixed carrier signal; Frequency is f-8f s, f+8f sand the other three descending optical carriers in tunnel of f are input to respectively in other three light intensity modulators, descending family network management control signal data, fiber to the desk data and WIFI data respectively as the modulation signal of other three light intensity modulators to f-8f s, f+8f sand the descending optical carrier in f San road is modulated;
Up light carrier generation device is comprised of a continuous wavelength laser, optical phase modulator, cosine signal source, Frequency reuser, electric amplifier and the erbium-doped fiber amplifier of 1:4, array waveguide grating that frequency is fs; The continuous light wave input optical phase modulator that it is F that continuous wavelength laser produces frequency, cosine signal source output frequency is f scosine signal to the Frequency reuser of 1:4, to produce frequency be 4f scosine signal as the driving signal of optical phase modulator, it is F-8f that optical phase modulator produces frequency s, F-4f s, F, F+4f s, F+8f smixed light carrier signal; Mixed light carrier signal is after erbium-doped fiber amplifier amplifies, and at array waveguide grating, isolating frequency is F-8f s, F-4f s, F, F+4f s, F+8f sthe up optical carrier in Wu road;
Upstream data demodulating equipment is comprised of a coupler, four winding devices and four road optical demodulators; Frequency is F-4f s, F+4f sthe up optical carrier of two-way in coupler, be coupled as row mixed carrier signal on the way and be input to a winding device, then from winding device, output to equalizer, frequency is F-8f s, F+8f sand the other three road optical carriers of F are input to respectively other three winding devices, then from winding device, output to equalizer; The upstream data modulation Hou tetra-up light carriers in tunnel from equalizer are delivered to respectively in four road optical demodulators, demodulate upstream data;
Frequency after modulation is f-4f s, f+4f sdown mixing optical carrier, modulation after frequency be f-8f s, f+8f s, f descending optical carrier and frequency be F-4f s, F+4f sup mixed light carrier signal, frequency be f-8f s, f+8f s, f up optical carrier in equalizer, carry out, after power equalization, at array waveguide grating, carrying out signal multiplexing, and in erbium-doped fiber amplifier, carry out by standard single-mode fiber, being transferred to home gateway end after power amplification; The upstream data modulation Hou tetra-up light carriers in tunnel from home gateway end carry out, after separation, being transported in equalizer at array waveguide grating;
2), home gateway end comprises array waveguide grating, WIFI signalling, fiber to the desk DIU data interface unit, millimeter wave transceiving device and domestic network control device;
Array waveguide grating is f-4f by the frequency after the modulation from standard single-mode fiber s, f+4f s, f-8f s, f+8f s, f descending optical carrier and frequency be F-4f s, F+4f s, F-8f s, F+8f s, F up optical carrier separate;
WIFI signalling comprises descender and ascender, descender is comprised of photodetector, two electric amplifiers, multiplier, 2.4GHz local vibration source and transmitting paraboloids, descending optical carrier after WIFI Data Modulation demodulates WIFI data-signal in photodetector, then by an electric amplifier, carry out power amplification, the 2.4GHz local oscillation signal in WIFI data-signal input multiplier after amplifying, 2.4GHz local vibration source being produced is modulated, signal after modulation is inputted in another electric amplifier and is carried out power amplification, then by transmitting paraboloid, is transmitted to terminal equipment, ascender comprises receiving paraboloid, intermediate frequency modulator, erbium-doped fiber amplifier and winding device, receiving paraboloid receives the WIFI data-signal that the terminal equipment of 2.4GHz sends, the optical carrier of row on the way that array waveguide grating is separated outputs to intermediate frequency modulator through winding device, in intermediate frequency modulator, by the WIFI data that receive, up optical carrier is modulated, up optical carrier after modulation amplifies by erbium-doped fiber amplifier, then be input to winding device, winding device is exported to standard single-mode fiber to be transferred to central station end,
Fiber to the desk DIU data interface unit is comprised of coupler and optical port; Descending optical carrier after fiber to the desk Data Modulation is sent into optical port with the coupling of row optical carrier on the way in coupler, by optical port, fiber to the desk data and up optical carrier is sent to terminal equipment; Terminal equipment sends to standard single-mode fiber to be transferred to central station end the up light carrier after upstream data modulation by optical port, coupler;
Millimeter wave transceiving device comprises descender and ascender; Descender comprises coupler, photodetector, electric amplifier and rectangular horn antenna, and the frequency after modulation is f-4f s, f+4f sdescending optical carrier send into photodetector after being coupled realize beat frequency, output 8f in coupler smillimeter-wave signal, by electric amplifier, undertaken after power amplification, by rectangular horn antenna transmission to terminal equipment; Ascender comprises rectangular horn antenna, multiplier, coupler, winding device, 50:50 coupler, intermediate frequency modulator, photo-detector and erbium-doped fiber amplifier, and frequency is F-4f s, F+4f sthe up optical carrier of two-way at coupler, be coupled, optical carrier after coupling is input to winding device, and then outputs to the coupler of 50:50, and optical carrier is decomposed into two-way, one tunnel is input to intermediate frequency modulator, and another road signal is input to photodetector beat frequency and obtains 8f smillimeter wave, and this millimeter wave is input to multiplier, simultaneously by by rectangular horn antenna reception to frequency be 8f s+ f imillimeter wave data-signal be input to multiplier and carry out mixing, after mixing, output frequency is f iupstream data. signals and be input to intermediate frequency modulator, being modulated to frequency is F-4f s, F+4f sthe up optical carrier of two-way on, the frequency after intermediate frequency modulator output modulation is F-4f s, F+4f sthe up optical carrier of two-way by erbium-doped fiber amplifier, carry out power amplification, the signal after amplification is input to winding device, from winding device, sends to coupler, by coupler, sends to standard single-mode fiber to be transferred to central station end;
Domestic network control device comprises optical modem and domestic network control interface; With the descending optical carrier of family network management control signal Data Modulation, in optical modem, carry out demodulation, the family network management control signal data that demodulate are sent into domestic network control interface, by domestic network control interface, send to terminal equipment, the upstream data that terminal equipment sends sends to optical modem to modulate with row light carrier on the way by domestic network control interface, and the up light carrier after modulation sends to standard single-mode fiber to be transferred to central station end.
2. the home gateway system that merges access based on optical-fiber wireless according to claim 1, it is characterized in that, the optical modem of described domestic network control device comprises first, second two winding devices, intermediate frequency modulator, a photo-detector, electric amplifier, an erbium-doped fiber amplifier;
Up light carrier is input to 1 port of the first winding device, and then is outputed in intermediate frequency modulator by 2 ports of this winding device;
With the descending optical carrier of family network management control signal Data Modulation, be input to photo-detector and carry out demodulation, the family network management control signal data that demodulate are carried out power amplification by electric amplifier, signal after amplification is input to 1 port of the second winding device, and the data-signal input domestic network control interface of 2 port outputs of this winding device, sends to terminal equipment by domestic network control interface; The upstream data that terminal equipment sends sends to 2 ports of the second winding device by domestic network control interface, and then exported by 3 ports of the second winding device, the signal of output is input to intermediate frequency modulator intermediate-freuqncy signal is modulated on up light carrier, signal after modulation carries out power amplification by erbium-doped fiber amplifier, signal after amplification is input to 3 ports of the first winding device, and the signal by after 1 port output modulation, then sends to standard single-mode fiber to be transferred to central station end the up light carrier after modulation.
3. the home gateway system that merges access based on optical-fiber wireless according to claim 1, is characterized in that, described millimeter-wave frequency is 60GHz.
CN201110288637.1A 2011-09-27 2011-09-27 Home gateway system based on fiber radio integration access Expired - Fee Related CN102448201B (en)

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