CN103516429A - W waveband broadband millimeter wave full duplex access method and system based on local oscillation broadcasting - Google Patents
W waveband broadband millimeter wave full duplex access method and system based on local oscillation broadcasting Download PDFInfo
- Publication number
- CN103516429A CN103516429A CN201310418077.6A CN201310418077A CN103516429A CN 103516429 A CN103516429 A CN 103516429A CN 201310418077 A CN201310418077 A CN 201310418077A CN 103516429 A CN103516429 A CN 103516429A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- wave
- light
- road
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a W waveband broadband millimeter wave full duplex access method and system based on local oscillation broadcasting. In a central station, N downlink data generation modules generate N SSB signals, a sharing local oscillation generation module generates W waveband light local oscillations, and wavelength division multiplexing is carried out on the N SSB signals and the light local oscillations, and the N SSB signals and the light local oscillations are transmitted to far-end nodes. After demultiplexing is carried out on the far-end nodes, each path of signals are regrouped into a light local oscillation and an SSB signal, and local oscillation broadcasting is achieved. Nonlinear interaction is carried out various paths of signals trough SOAs to generate multi-idler-frequency-light, carrier waves in the SSB signals and certain idler frequency light carrying signals with frequency space within a range of 75-110GHz with the SSB signals are coupled to be transmitted to a base station, beat frequency is carried out, and W waveband radio frequency electrical signals are generated. In the base station, a part of carrier waves in down links are extracted through fiber bragg gratings to serve as carrier waves of uplink signals. Wavelength division multiplexing is carried out on the uplink signals after modulation on the far-end nodes, the uplink signals are transmitted to the central station, and a full duplex RoF link is completed.
Description
Technical field
The present invention relates to optical communication and millimetre-wave attenuator field, relate in particular to the full duplex network architectural framework that Distance Transmission was processed and grown by optical fiber in light territory that the RoF technology utilized based on WDM-PON and local oscillator broadcast technology realize W wave band millimeter wave signal.
Background technology
In recent years, along with developing rapidly of the communication technology, the scope of business of communication is constantly expanded, and people require to improve constantly to the transmission capacity of communication network, and this makes transmission network to the wave division multiplex transmission future development of the full light exchange based on optical fiber.
Wavelength identifying user end ONU for Wave division multiplexing passive optical network (WDM-PON), there is protocol transparent, be with roomy, safety, the advantage such as convenient deployment, be to realize the even effective scheme of higher rate PON optical fiber access of 40Gb/s, but the flexible convenience of access in radio is limited.Wireless communication section or whole channels adopt radio wave as transmission medium, can realize the flexible access of user terminal, and this advantage gains great popularity radio communication.But can provide at present the WiMAX of wireless access and the Theoretical Rate of LTE in 10Mb/s magnitude, the Theoretical Rate of WiFi is in 100Mb/s magnitude, point-to-point microwave link speed is also in 100Mb/s magnitude, cannot meet the needs of following broadband connections, and these narrowband wireless communications low-frequency wireless used electricity frequency spectrum is very crowded.By contrast, W wave band (75-110GHz) millimeter wave can provide the frequency spectrum resource of 35GHz, and the window in atmospheric attenuation, even the super wideband wireless access of 100Gb/s is relatively easy to realize 40Gb/s, and is expected to solve the speed mismatch of optical fiber and wireless access.
RoF technology can solve the loss of high-frequency wideband wireless access and the problem such as device bandwidth is limited, and what be expected to significantly to reduce millimeter wave broadband wireless access realizes difficulty and cost, makes optical fiber and Radio Access Network realize seamless fusion.Although, RoF technology is also applicable to W wave band (75-110GHz) in principle, but along with increase and the millimeter-wave frequency of signal bandwidth is increased to W wave band, high frequency millimeter wave RoF technology also shows some new problems, can not be directly by RoF Technique Popularizing to W wave band.First the impact that is optical fiber dispersion is more serious, and the amplitude fading being caused by optical fiber dispersion and pulse are walked from more serious.Next is the problem that millimeter wave produces, although modulate the impact that can overcome dispersion by SSB, does not have speed to surpass the directly modulated lasers of 70GHz, and external modulation needed 70GHz bandwidth optical modulator and Millimeter-Wave Source also do not have commercialization.The method that the millimeter wave of report produces at present mainly contains two kinds: the frequency-doubled effect that modulate by non-linear radio frequency (1) produces two light waves that frequency interval equals required millimeter-wave frequency, be that double frequency light carries millimeter wave carrier, then by the two separation, by Data Modulation therein on a carrier wave light wave, the method is floated less frequently, but has obvious phase noise; The separate lasers that (2) two output frequency intervals equal required millimeter-wave frequency produces this two light waves, before light wave closes road, data are loaded on one of them light wave, although the method is simple, the two frequency and phase-independent, float with phase noise serious frequently.And the light that baud rate surpasses 10Gb/s carries millimeter-wave signal, with the impact of internal dispersion, also need to consider.Secondly, along with the increase that SSB light carries millimeter-wave frequency, the idle frequency spectrum between two optical frequency compositions also increases thereupon, and the utilization ratio of optical fiber frequency spectrum resource reduces.Again, it is all to utilize photodetector at a high speed that W band of light is carried the device that millimeter signal is converted to the signal of telecommunication, and as PIN-PD, UTC-PD, NBUTC-PD, its bandwidth at least needs to be greater than millimeter-wave frequency, and photoelectric conversion efficiency is high as much as possible.A.Hirata, the Taiwan J.W.Shi group of the I.T.Monroy of Technical University Of Denmark group, DTU, Japan has all been done correlative study to the generation of W wave band millimeter wave, but its speed used is greater than the transmitter of high-frequency wideband wireless link of 10Gb/s not based on simple electronic device.
Summary of the invention
For overcoming the above problems, the invention provides a kind of W band broadband millimeter wave full duplex cut-in method and system based on local oscillator broadcast.
The invention provides a kind of W band broadband millimeter wave full duplex cut-in method based on local oscillator broadcast, for improving the spectrum utilization efficiency of optical fiber link, reduce the data-signal damage that optical fiber dispersion causes, simplified network structure, realize the access of W wave band millimeter wave super wideband wireless, it comprises: in the downlink transmission module of central station, comprise N downstream signal generation module and the shared trimmed book generation module that shakes; At downstream signal generation module, take i road as example, by frequency, be f
ilaser send light wave, be incident to lithium niobate Mach-Zehnder modulator, by carrying downlink data signal a
ifrequency be f
rFilocal oscillation signal drive, generation frequency is f
icentered carrier C
iand bearing downlink data-signal a
ifrequency be f
i+ f
rFisingle order sideband A
i; At the shared trimmed book generation module that shakes, frequency is f
l1laser send light wave, be incident to the lithium niobate Mach-Zehnder modulator of two cascades, by frequency, be f
l2radio frequency signals drive its to produce frequency interval be 8f
l2two relevant sidebands, the shared trimmed book of the system that the is OLO that shakes, utilizes Erbium-Doped Fiber Amplifier to carry out power amplification to it; N road descending SSB signal B
1, B
2..., B
i..., B
nand trimmed book shakes that to close road by wavelength division multiplexer be downlink optical signal to OLO, be transmitted through the fiber to far-end switching node; Down link processing module at far-end switching node, Wave decomposing multiplexer is N road signal by the downlink optical signal demultiplexing of wavelength division multiplexing, the trimmed book OLO that shakes is divided into the N road of constant power after amplifying by 1 * N optical coupler, be reassembled as each road and all comprise the shake downstream signal of OLO of SSB signal and trimmed book, utilize the four-wave mixing effect of semiconductor optical amplifier to make shake each frequency content generation nonlinear interaction of OLO of SSB signal and trimmed book, the i road signal of take is example, produces and SSB optical signal carrier C
ifrequency interval is 8f
l2+ 3f
rFiideler frequency light X
i, C
iwith X
ibeing combined into frequency interval is 8f
l2+ 3f
rFiw wave band millimeter wave light signal, be transmitted through the fiber to base station; In the down link processing module ，Ge base station of base station, carry out opto-electronic conversion and produce rf signal, the i road signal of take is example, and photodetector will be by C
iand X
iit is 8f that the millimeter wave light signal forming is converted to frequency
l2+ 3f
rFiw wave band millimeter wave signal of telecommunication R
i, by antenna transmission, held to wireless user, complete the transmission of downstream signal; At the down link receiver module of user side, by envelope detection by antenna reception to millimeter-wave signal be demodulated into baseband signal; In the uplink transmit module of user side, i user's tranmitting frequency is f
eiw wave band millimeter wave wireless signal E
ito base station; Uplink processing module in base station, is demodulated into baseband signal by envelope detection by the up millimeter-wave signal of antenna reception, and by light modulator modulates on light wave, the i road upward signal of take is example, by the radiofrequency signal E receiving
iby envelope detection down conversion, be baseband signal e
i, utilize Fiber Bragg Grating FBG, by the part light carrier C in down link
iloopback utilizes, and as the carrier wave of upward signal, utilizes lithium niobate Mach-Zehnder modulator by e
ibe loaded into C
iupper, form signal F
i, process Optical Fiber Transmission is to distant-end node; In distant-end node uplink processing module, from the N road uplink optical signal F of N base station
1, F
2..., F
i..., F
nvia wavelength division multiplexer, be multiplexed with up link light signal, by optical fiber, pass central station back; At the up link receiver module of central station, a Wave decomposing multiplexer is by up N road light signal demultiplexing; Each road light signal is N road uplink baseband signal e by photodetector down conversion
1, e
2..., e
i..., e
n; Above-mentioned up link and down link can be realized the full duplex transmission of signal, have formed full-duplex link.
As a kind of method for optimizing, in the downlink transmission module of central station: at downstream signal generation module, take i road as example, is f by frequency
ilaser send light wave, being incident to modulation voltage is the lithium niobate Mach-Zehnder modulator that 2.3V, half-wave voltage are 4V, by carrying downlink data signal a
ifrequency be f
rFilocal oscillation signal drive, make it produce SSB signal B
i, it comprises that frequency is f
icentered carrier C
iand bearing downlink data-signal a
ifrequency be f
i+ f
rFisingle order sideband A
i; Be carried in the downstream signal a on single order sideband
iit can be the binary intensity modulation signal of different rates; At the shared trimmed book generation module that shakes, frequency is f
l1laser send light wave, be incident to two cascade lithium niobate Mach-Zehnder modulators that are offset to maximum bias point, by frequency, be f
l2radio frequency signals drive its to produce frequency interval be 8f
l2two relevant sidebands, the shared trimmed book of the system that the is OLO that shakes; The trimmed book vibration frequency interval 8f producing
l2in W wavelength band, when utilizing local oscillator and SSB signal to produce W wave band millimeter wave signal, due to the trimmed book broader bandwidth of shaking, so reduced the requirement to SSB signal bandwidth, improved the spectrum utilization efficiency of optical fiber link simultaneously.
As a kind of method for optimizing, down link processing module at far-end switching node: the four-wave mixing effect that utilizes semiconductor optical amplifier, the trimmed book of usining shakes OLO as pump light, and SSB signal, as flashlight, makes each frequency content generation nonlinear interaction of flashlight and OLO; Take i road as example, OLO and B
ibe incident to semiconductor optical amplifier, after four wave mixing nonlinear interaction, the many groups of output carrier frequency is spaced apart 8f
l2sSB ideler frequency light signal and frequency interval be f
rFiideler frequency light signal, each ideler frequency light all carries signal a
i; We choose and flashlight B
iin carrier wave C
ifrequency interval is 8f
l2+ 3f
rFiideler frequency light X
i, X
iwith C
ibe combined into radio frequency light signal, its frequency is in W wavelength band; Due to C
ido not carry signal, only have X
ibe loaded with signal, so this downstream signal is subject to the impact of optical fiber dispersion less; In addition, in each road downstream signal, the trimmed book used OLO that shakes obtains by broadcast.
Down link processing module as a kind of method for optimizing ， base station: the i road signal of take is example, by C
iand X
ithe radio frequency light signal forming is incident to Fiber Bragg Grating FBG, by its reflection coefficient of suitable adjusting, makes C
ihalf luminous power by the reflex port of Fiber Bragg Grating FBG, exported, it is using the carrier wave as upward signal; C
isecond half luminous power and X
itransmission mouth by Fiber Bragg Grating FBG is exported, and utilizes photodetector to be converted to the signal of telecommunication, and frequency beat frequency being produced by band pass filter is 8f
l2+ 3f
rFiw waveband radio frequency signal R
ileach, by antenna transmission, held to wireless user, complete the transmission of downstream signal; Because each base station only need to be carried out the light signal transmitting opto-electronic conversion, bandpass filtering and by antenna transmission, simplify the structure of base station for down link.
Uplink processing module as a kind of method for optimizing ， base station: with signal Wei Li， base station, i road by envelope detection by the radiofrequency signal E receiving
ibe converted to base electrical signal e
i; Utilize Fiber Bragg Grating FBG, suitably regulate its reflection coefficient, extract carrier wave C in down link
ihalf luminous power, as the carrier wave of upward signal; Utilize lithium niobate Mach-Zehnder modulator by e
ibe loaded into the C of extraction
iupper, form signal F
i; Because up link light carrier can directly extract from down link, base station gauge without light source, without additional light source, has been realized in base station, has simplified architecture of base station and function, has reduced power consumption, has provided cost savings.
The invention provides a kind of W band broadband millimeter wave full duplex connecting system based on local oscillator broadcast, it comprises:
A central station, a far-end switching node, N base station, N user side, for broadcasting the full duplex fibre-optical channel of W band of light local oscillator and transmission uplink and downlink base band or intermediate frequency light signal;
Downlink transmission module at central station: comprise N downstream signal generation module and the shared trimmed book generation module that shakes; Main devices comprises laser, lithium niobate Mach-Zehnder modulator, radio-frequency (RF) local oscillator, wavelength division multiplexer, Erbium-Doped Fiber Amplifier; At downstream signal generation module, take i road as example, it is f that laser produces centre frequency
icontinuous laser, be incident to lithium niobate Mach-Zehnder modulator, carry downlink data signal a
ifrequency be f
rFilocal oscillation signal drive, generation frequency is f
icentered carrier C
iand bearing downlink data-signal a
ifrequency be f
i+ f
rFisingle order sideband A
i; At the shared trimmed book generation module that shakes, frequency is f
l1laser send light wave, be incident to the lithium niobate Mach-Zehnder modulator of two cascades, by frequency, be f
l2radio frequency signals drive its to produce frequency interval be 8f
l2two relevant sidebands, the shared trimmed book of the system that the is OLO that shakes; Erbium-Doped Fiber Amplifier is shaken and is carried out power amplification trimmed book; N road descending SSB signal B
1, B
2..., B
i..., B
nand the trimmed book OLO that shakes is combined into a road signal by wavelength division multiplexer and is transmitted through the fiber to far-end switching node;
Down link processing module at far-end switching node: main devices comprises Wave decomposing multiplexer, 1 * N optical coupler, semiconductor optical amplifier, band pass filter, 2 * 1 optical couplers; Wave decomposing multiplexer is decomposed into N road downstream signal by the light signal of receiving, the trimmed book OLO that shakes is divided into the N road of constant power by 1 * N optical coupler, be reassembled as each road and all comprise the shake downstream signal of OLO of SSB signal and trimmed book, utilize the four-wave mixing effect of semiconductor optical amplifier to make each frequency content generation nonlinear interaction of light signal of inputting, the i road signal of take is example, B
ibe incident to semiconductor optical amplifier with OLO, produce and SSB optical signal carrier C
ifrequency interval is 8f
l2+ 3f
rFiideler frequency light X
i, other composition of filtering, C
iwith X
ibeing combined into frequency interval is 8f
l2+ 3f
rFiw wave band millimeter wave light signal, be transmitted through the fiber to base station;
Down link processing module in base station: main devices comprises photodetector, band pass filter, antenna; In each base station, carry out opto-electronic conversion and produce rf signal, the i road signal of take is example, and photodetector will be by C
iand X
iit is 8f that the millimeter wave light signal forming is converted to frequency
l2+ 3f
rFiw wave band millimeter wave signal of telecommunication R
iand baseband signal, utilize band pass filter to leach R
i, by antenna transmission, held to wireless user, complete the transmission of downstream signal;
Down link receiver module at user side: main devices comprises reception antenna, envelope detector, low pass filter; Each user side by envelope detector and low pass filter by antenna reception to millimeter-wave signal be demodulated into baseband signal;
Uplink transmit module at user side: each user launches W waveband radio frequency signal E by wireless device
1, E
2..., E
i..., E
nto each respective base station;
Uplink processing module in base station: main devices comprises envelope detector, low pass filter, Fiber Bragg Grating FBG, lithium niobate Mach-Zehnder modulator; The i road upward signal of take is example, by envelope detection and low-pass filtering by the up millimeter-wave signal E of antenna reception
ibe demodulated into baseband signal e
i, Fiber Bragg Grating FBG is for extracting the partial carrier wave of down link, as the carrier wave of upward signal; Utilize Fiber Bragg Grating FBG, by the part light carrier C in down link
iloopback utilizes, and as the light carrier of upward signal, utilizes lithium niobate Mach-Zehnder modulator by e
ibe loaded into C
iupper, form signal F
i, be transmitted through the fiber to distant-end node;
Uplink processing module at far-end switching node: main devices is wavelength division multiplexer; Uplink optical signal F from N base station
1, F
2..., F
i..., F
nvia wavelength division multiplexer, be combined into a road light signal, by optical fiber, pass central station back;
Up link receiver module at central station: main devices comprises Wave decomposing multiplexer, photodetector; Wave decomposing multiplexer is by up N road light signal demultiplexing; Each road light signal is converted to signal of telecommunication e by photodetector
1, e
2..., e
i..., e
n;
For broadcasting the full duplex fibre-optical channel of W band of light local oscillator and transmission uplink and downlink base band or intermediate frequency light signal: mainly comprise standard single-mode fiber, realize effective transmission of up-downgoing light signal.
Adopt after technical scheme provided by the invention: due to the downstream signal a being carried on single order sideband
ican be the binary intensity modulation signal of different rates, make system there is flexibility; Introducing because W wave band broadcast millimeter wave trimmed book shakes, has reduced the requirement to SSB signal bandwidth, has improved the spectrum utilization efficiency of optical fiber link simultaneously; Because down link signal is single-side band modulation, can effectively reduce the impact of optical fiber dispersion, extended the transmission range that light carries millimeter-wave signal; Each road signal can produce a plurality of ideler frequency light by four wave mixing, selects the W waveband radio frequency light signal of different ideler frequency light and carrier wave formation different frequency, the flexibility that has improved system; Because up link light carrier can directly extract from down link, base station gauge without light source, without additional light source, has been realized in base station, has simplified architecture of base station and function, has reduced power consumption, has provided cost savings.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the broadband millimeter-wave signal full duplex connecting system based on WDM-PON/ local oscillator broadcast announced of the present invention.
The i road descending SSB signal B of Fig. 2 for being sent by central station
iand the shake spectrogram of OLO of trimmed book.
Fig. 3 is that the carrier frequency that i road downstream signal is produced by four-wave mixing effect at distant-end node is spaced apart 8f
l2many groups SSB ideler frequency light signal and frequency interval be f
rFiideler frequency light signal spectrogram.
Fig. 4 is carrier wave C in the downlink optical signal of i road
iand with interval be the ideler frequency light X of 110GHz
ispectrogram.
Tu5Wei base station i road downlink radio-frequency signal R
ielectric territory spectrogram.
Fig. 6 is that i road downstream signal is in BTB situation, at the baseband signal eye pattern of user's receiving terminal demodulation 10Gb/s out.
Fig. 7 is that i road downstream signal is after 20km Optical Fiber Transmission, at the baseband signal eye pattern of user's receiving terminal demodulation 10Gb/s out.
The up radiofrequency signal E in i road that Tu8Wei base station receives
ielectric territory spectrogram.
Fig. 9 is i road upward signal E
ibe carried in carrier wave C
iafter upper, the signal F of formation
ispectrogram.
Figure 10 be i road upward signal in BTB situation, the baseband signal eye pattern of the 3Gb/s at central station after envelope detection demodulation.
Figure 11 be i road upward signal after 20km Optical Fiber Transmission, the baseband signal eye pattern of the 3Gb/s at central station after envelope detection demodulation.
Embodiment
The invention provides a kind of broadband millimeter-wave signal full duplex cut-in method based on the broadcast of WDM-PON/ local oscillator, for improving the spectrum utilization efficiency of optical fiber link, reduce the data-signal damage that optical fiber dispersion causes, simplified network structure, realize the access of W wave band millimeter wave super wideband wireless, for realizing above-mentioned effect, need to adopt following step:
Downlink transmission module at central station: comprise N downstream signal generation module and the shared trimmed book generation module that shakes; At downstream signal generation module, take i road as example, by frequency, be f
ithe laser of=193.19THz sends light wave, and being incident to modulation voltage is the lithium niobate Mach-Zehnder modulator that 2.3V, half-wave voltage are 4V, by carrying binary system downlink data signal a
ifrequency be f
rFithe local oscillation signal of=10GHz drives, and generation frequency is f
ithe centered carrier C of=193.19THz
iand bearing downlink data-signal a
ifrequency be f
i+ f
rFithe single order sideband A of=193.2THz
i; Form SSB signal B
i, transfer to multiplexer.At the shared trimmed book generation module that shakes, frequency is f
l1the laser of=193.1THz sends light wave, is incident to two cascade lithium niobate Mach-Zehnder modulators that are offset to maximum bias point, by frequency, is f
l2its generation frequency interval of the radio frequency signals drive of=10GHz is 8f
l2two relevant sidebands of=80GHz, the shared trimmed book of the system that the is OLO that shakes.N road descending SSB signal B
1, B
2..., B
i..., B
nand the trimmed book OLO that shakes is transmitted through the fiber to far-end switching node through wavelength division multiplexing.
Down link processing module at far-end switching node: Wave decomposing multiplexer is N road signal by the downlink optical signal demultiplexing of wavelength division multiplexing, the trimmed book OLO that shakes is divided into the N road of constant power by 1 * N optical coupler, be reassembled as each road and all comprise the shake downlink optical signal of OLO of corresponding SSB signal and trimmed book, realized millimeter wave trimmed book and shaken in the broadcast of whole network.Utilize the four-wave mixing effect of semiconductor optical amplifier, make each road flashlight and OLO that nonlinear interaction occur, produce a plurality of ideler frequency light components, selection is spaced apart an ideler frequency light that carries signal within the scope of 75-110GHz with the carrier frequency in flashlight, be combined into after a road light signal with carrier wave, transfer to base station.The i road downstream signal of take is example, and it comprises SSB signal B
iand the trimmed book OLO that shakes, its frequency spectrum is as shown in Figure 2.Trimmed book shakes OLO as pump light, B
ias flashlight, transfer to the semiconductor optical amplifier that Injection Current is 200mA, utilize its four-wave mixing effect to produce many group carrier frequencies as shown in Figure 3 and be spaced apart 8f
l2the SSB ideler frequency light signal of=80GHz and frequency interval are f
rFithe ideler frequency light signal of=10GHz, does not carry signal on carrier wave in ideler frequency light SSB signal, and we choose the ideler frequency light X that carries signal
i, itself and flashlight B
iin carrier wave C
ifrequency interval is 8f
l2+ 3f
rFi=110GHz, X
iwith C
ibe combined into radio frequency light signal, be transmitted through the fiber to base station.Its frequency spectrum as shown in Figure 4.
Down link processing module in base station: carry out opto-electronic conversion in each base station and produce rf signal, the i road signal of take is example, photodetector by transmit by C
iand X
iit is 8f that the millimeter wave light signal forming is converted to frequency
l2+ 3f
rFithe W wave band millimeter wave signal of telecommunication R of=110GHz
i, by antenna transmission to wireless user Duan，Qi electricity territory frequency spectrum as shown in Figure 5.
Down link receiver module at user side: be baseband signal by the radiofrequency signal down conversion receiving by envelope detection.We take i road signal is example, the radiofrequency signal R receiving
iafter envelope detection, obtain baseband signal a
i.Can observation signal quality by eye pattern.Fig. 6 is signal a
ithrough 0km, 5km, 10km, the eye pattern after 20km Optical Fiber Transmission.
Uplink transmit module at user side: each user launches W waveband radio frequency signal E by wireless device
1, E
2..., E
i..., E
nto each respective base station.I road signal E
ifor the radiofrequency signal ，Qi electricity territory frequency spectrum of 80GHz as shown in Figure 7.
Uplink processing module in base station: N base station is baseband signal by the radiofrequency signal down conversion receiving respectively.The i road upward signal of take is example, by the radiofrequency signal E of 80GHz
iby envelope detection down conversion, be baseband signal e
i.Utilize Fiber Bragg Grating FBG, extract carrier wave C in down link
ihalf luminous power, as the carrier wave of upward signal, utilize Mach-Zehnder modulator by e
ibe loaded into the C of extraction
iupper, form signal F
i, process Optical Fiber Transmission is to distant-end node.Fig. 8 is signal F
ifrequency spectrum.
Uplink processing module at far-end switching node: from the N road uplink optical signal F of N base station
1, F
2..., F
i..., F
nvia wavelength division multiplexer, be multiplexed with up link light signal, by optical fiber, pass central station back.
Up link receiver module at central station a: Wave decomposing multiplexer is N road uplink baseband signal of telecommunication e by up light signal demultiplexing ，Ge road, N road light signal by photodetector down conversion
1, e
2..., e
i..., e
n.I road signal F
ithrough opto-electronic conversion and low pass filter, obtain baseband signal e
i.Fig. 9 is e
ieye pattern after 0km, 5km, 10km, 20km Optical Fiber Transmission.
Broadband millimeter-wave signal distributions full-duplex method and system based on the broadcast of WDM-PON/ local oscillator that the present invention proposes have following beneficial effect:
(1) be carried in the downstream signal a on single order sideband
ican be the binary intensity modulation signal of different rates, make system there is flexibility.
(2) introducing of shaking due to W wave band broadcast millimeter wave trimmed book, has reduced the requirement to SSB signal bandwidth, has improved the spectrum utilization efficiency of optical fiber link simultaneously.
(3) down link signal is SSB signal, can effectively reduce the impact of optical fiber dispersion, has extended the transmission range that light carries millimeter-wave signal.
(4) each road signal can produce a plurality of ideler frequency light by four wave mixing, selects the W waveband radio frequency light signal of different ideler frequency light and carrier wave formation different frequency, the flexibility that has improved system.
(5), because up link light carrier can directly extract from down link, base station gauge without light source, without additional light source, has been realized in base station, has simplified architecture of base station and function, has reduced power consumption, has provided cost savings.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (7)
1. the broadband millimeter-wave signal distributions full-duplex method based on WDM-PON/ local oscillator broadcast, be used for realizing the access of W wave band millimeter wave super wideband wireless, utilize the shared broadcast trimmed book of W wave band to shake, improve the spectrum utilization efficiency of optical fiber link, reduce the data-signal damage that optical fiber dispersion causes, simplified network structure, is characterized in that, it comprises the steps:
Downlink transmission module at central station: comprise N downstream signal generation module and the shared trimmed book generation module that shakes; At downstream signal generation module, take i road as example, by frequency, be f
ilaser send light wave, be incident to lithium niobate Mach-Zehnder modulator, by carrying downlink data signal a
ifrequency be f
rFilocal oscillation signal drive, generation frequency is f
icentered carrier C
iand bearing downlink data-signal a
ifrequency be f
i+ f
rFisingle order sideband A
i; At the shared trimmed book generation module that shakes, frequency is f
l1laser send light wave, be incident to the lithium niobate Mach-Zehnder modulator of two cascades, by frequency, be f
l2radio frequency signals drive its to produce frequency interval be 8f
l2two relevant sidebands, the shared trimmed book of the system that the is OLO that shakes, utilizes Erbium-Doped Fiber Amplifier to carry out power amplification to it; N road descending SSB signal B
1, B
2..., B
i..., B
nand trimmed book shakes that to close road by wavelength division multiplexer be downlink optical signal to OLO, be transmitted through the fiber to far-end switching node;
Down link processing module at far-end switching node: Wave decomposing multiplexer is N road signal by the downlink optical signal demultiplexing of wavelength division multiplexing, the trimmed book OLO that shakes is divided into the N road of constant power after amplifying by 1 * N optical coupler, be reassembled as each road and all comprise the shake downstream signal of OLO of SSB signal and trimmed book, utilize the four-wave mixing effect of semiconductor optical amplifier to make shake each frequency content generation nonlinear interaction of OLO of SSB signal and trimmed book, the i road signal of take is example, produces and SSB optical signal carrier C
ifrequency interval is 8f
l2+ 3f
rFiideler frequency light X
i, C
iwith X
ibeing combined into frequency interval is 8f
l2+ 3f
rFiw wave band millimeter wave light signal, be transmitted through the fiber to base station;
Down link processing module in base station: carry out opto-electronic conversion and produce rf signal, the i road signal of take is example, and photodetector will be by C
iand X
iit is 8f that the millimeter wave light signal forming is converted to frequency
l2+ 3f
rFiw wave band millimeter wave signal of telecommunication R
i, by antenna transmission, held to wireless user, complete the transmission of downstream signal;
Down link receiver module at user side: by envelope detection by antenna reception to millimeter-wave signal be demodulated into baseband signal;
Uplink transmit module at user side: i user's tranmitting frequency is f
eiw wave band millimeter wave wireless signal E
ito base station;
Uplink processing module in base station: by envelope detection, the up millimeter-wave signal of antenna reception is demodulated into baseband signal, and by light modulator modulates on light wave, the i road upward signal of take is example, by the radiofrequency signal E receiving
iby envelope detection down conversion, be baseband signal e
i, utilize Fiber Bragg Grating FBG, by the part light carrier C in down link
iloopback utilizes, and as the carrier wave of upward signal, utilizes lithium niobate Mach-Zehnder modulator by e
ibe loaded into C
iupper, form signal F
i, process Optical Fiber Transmission is to distant-end node;
In distant-end node uplink processing module: from the N road uplink optical signal F of N base station
1, F
2..., F
i..., F
nvia wavelength division multiplexer, be multiplexed with up link light signal, by optical fiber, pass central station back;
Up link receiver module at central station a: Wave decomposing multiplexer is by up N road light signal demultiplexing; Each road light signal is N road uplink baseband signal e by photodetector down conversion
1, e
2..., e
i..., e
n;
Above-mentioned up link and down link can be realized the full duplex transmission of signal, have formed full-duplex link.
2. method according to claim 1, the downlink transmission module at central station, is characterized in that:
At downstream signal generation module, take i road as example, by frequency, be f
ilaser send light wave, be incident to lithium niobate Mach-Zehnder modulator, by carrying downlink data signal a
ifrequency be f
rFilocal oscillation signal drive, make it produce SSB signal B
i, it comprises that frequency is f
icentered carrier C
iand bearing downlink data-signal a
ifrequency be f
i+ f
rFisingle order sideband A
i; Be carried in the downstream signal a on single order sideband
iit can be the binary intensity modulation signal of different rates;
At the shared trimmed book generation module that shakes, frequency is f
l1laser send light wave, be incident to two cascade lithium niobate Mach-Zehnder modulators that are offset to maximum bias point, by frequency, be f
l2radio frequency signals drive its to produce frequency interval be 8f
l2two relevant sidebands, the shared trimmed book of the system that the is OLO that shakes, utilizes Erbium-Doped Fiber Amplifier to carry out power amplification to it; The trimmed book vibration frequency interval 8f producing
l2in W wavelength band, when utilizing local oscillator and SSB signal to produce W wave band millimeter wave signal, due to the trimmed book broader bandwidth of shaking, so reduced the requirement to SSB signal bandwidth, improved the spectrum utilization efficiency of optical fiber link simultaneously.
3. method according to claim 1, the down link processing module at far-end switching node, is characterized in that:
Wave decomposing multiplexer is N road signal by the downlink optical signal demultiplexing of wavelength division multiplexing, the trimmed book OLO that shakes is divided into the N road of constant power by 1 * N optical coupler, be reassembled as each road and all comprise the shake downstream signal of OLO of SSB signal and trimmed book, utilize the four-wave mixing effect of semiconductor optical amplifier, the trimmed book of usining shakes OLO as pump light, SSB signal, as flashlight, makes each frequency content generation nonlinear interaction of flashlight and OLO; Take i road as example, OLO and B
ibe incident to semiconductor optical amplifier, after four wave mixing nonlinear interaction, the many groups of output carrier frequency is spaced apart 8f
l2sSB ideler frequency light signal and frequency interval be f
rFiideler frequency light signal, each ideler frequency light all carries signal a
i; We choose and flashlight B
iin carrier wave C
ifrequency interval is 8f
l2+ 3f
rFiideler frequency light X
i, X
iwith C
ibe combined into radio frequency light signal, its frequency is in W wavelength band; Due to C
ido not carry signal, only have X
ibe loaded with signal, so this downstream signal is subject to the impact of optical fiber dispersion less; In addition, in each road downstream signal, the trimmed book used OLO that shakes obtains by broadcast.
4. the down link processing module of method ， base station according to claim 1, is characterized in that:
The i road signal of take is example, by C
iand X
ithe radio frequency light signal forming is incident to Fiber Bragg Grating FBG, by its reflection coefficient of suitable adjusting, makes C
ihalf luminous power by the reflex port of Fiber Bragg Grating FBG, exported, it is using the carrier wave as upward signal; C
isecond half luminous power and X
itransmission mouth by Fiber Bragg Grating FBG is exported, and utilizes photodetector to be converted to the signal of telecommunication, and frequency beat frequency being produced by band pass filter is 8f
l2+ 3f
rFiw waveband radio frequency signal R
ileach, by antenna transmission, held to wireless user, complete the transmission of downstream signal; Because each base station only need to be carried out the light signal transmitting opto-electronic conversion, bandpass filtering and by antenna transmission, simplify the structure of base station for down link.
5. the uplink processing module of method ， base station according to claim 1, is characterized in that:
With signal Wei Li， base station, i road by envelope detection by the radiofrequency signal E receiving
ibe converted to base electrical signal e
i; Utilize Fiber Bragg Grating FBG, suitably regulate its reflection coefficient, extract carrier wave C in down link
ihalf luminous power, as the carrier wave of upward signal; Utilize lithium niobate Mach-Zehnder modulator by e
ibe loaded into the C of extraction
iupper, form signal F
i; Because up link light carrier can directly extract from down link, base station gauge without light source, without additional light source, has been realized in base station, has simplified architecture of base station and function, has reduced power consumption, has provided cost savings.
6. method according to claim 1, for broadcasting the full duplex wavelength channel of W band of light local oscillator and transmission uplink and downlink base band and intermediate frequency light signal, is characterized in that:
The light signal of up link and down link transmits by standard single-mode fiber, have two independently monomode fiber form, up, downstream signal transmits respectively in up, downlink optical fiber.
7. a broadband millimeter-wave signal distributions full duplex system based on the broadcast of WDM-PON/ local oscillator, is characterized in that, it comprises:
A central station, a far-end switching node, N base station, N user side, for broadcasting the full duplex fibre-optical channel of W band of light local oscillator and transmission uplink and downlink base band or intermediate frequency light signal;
Downlink transmission module at central station: comprise N downstream signal generation module and the shared trimmed book generation module that shakes; Main devices comprises laser, lithium niobate Mach-Zehnder modulator, radio-frequency (RF) local oscillator, wavelength division multiplexer, Erbium-Doped Fiber Amplifier; At downstream signal generation module, take i road as example, it is f that laser produces centre frequency
icontinuous laser, be incident to lithium niobate Mach-Zehnder modulator, carry downlink data signal a
ifrequency be f
rFilocal oscillation signal drive, generation frequency is f
icentered carrier C
iand bearing downlink data-signal a
ifrequency be f
i+ f
rFisingle order sideband A
i; At the shared trimmed book generation module that shakes, frequency is f
l1laser send light wave, be incident to the lithium niobate Mach-Zehnder modulator of two cascades, by frequency, be f
l2radio frequency signals drive its to produce frequency interval be 8f
l2two relevant sidebands, the shared trimmed book of the system that the is OLO that shakes; Erbium-Doped Fiber Amplifier is shaken and is carried out power amplification trimmed book; N road descending SSB signal B
1, B
2..., B
i..., B
nand the trimmed book OLO that shakes is combined into a road signal by wavelength division multiplexer and is transmitted through the fiber to far-end switching node;
Down link processing module at far-end switching node: main devices comprises Wave decomposing multiplexer, 1 * N optical coupler, semiconductor optical amplifier, band pass filter, 2 * 1 optical couplers; Wave decomposing multiplexer is decomposed into N road downstream signal by the light signal of receiving, the trimmed book OLO that shakes is divided into the N road of constant power by 1 * N optical coupler, be reassembled as each road and all comprise the shake downstream signal of OLO of SSB signal and trimmed book, utilize the four-wave mixing effect of semiconductor optical amplifier to make each frequency content generation nonlinear interaction of light signal of inputting, the i road signal of take is example, B
ibe incident to semiconductor optical amplifier with OLO, produce and SSB optical signal carrier C
ifrequency interval is 8f
l2+ 3f
rFiideler frequency light X
i, other composition of filtering, C
iwith X
ibeing combined into frequency interval is 8f
l2+ 3f
rFiw wave band millimeter wave light signal, be transmitted through the fiber to base station;
Down link processing module in base station: main devices comprises photodetector, band pass filter, antenna; In each base station, carry out opto-electronic conversion and produce rf signal, the i road signal of take is example, and photodetector will be by C
iand X
iit is 8f that the millimeter wave light signal forming is converted to frequency
l2+ 3f
rFiw wave band millimeter wave signal of telecommunication R
iand baseband signal, utilize band pass filter to leach R
i, by antenna transmission, held to wireless user, complete the transmission of downstream signal;
Down link receiver module at user side: main devices comprises reception antenna, envelope detector, low pass filter; Each user side by envelope detector and low pass filter by antenna reception to millimeter-wave signal be demodulated into baseband signal;
Uplink transmit module at user side: each user launches W waveband radio frequency signal E by wireless device
1, E
2..., E
i..., E
nto each respective base station;
Uplink processing module in base station: main devices comprises envelope detector, low pass filter, Fiber Bragg Grating FBG, lithium niobate Mach-Zehnder modulator; The i road upward signal of take is example, by envelope detection and low-pass filtering by the up millimeter-wave signal E of antenna reception
ibe demodulated into baseband signal e
i, Fiber Bragg Grating FBG is for extracting the partial carrier wave of down link, as the carrier wave of upward signal; Utilize Fiber Bragg Grating FBG, by the part light carrier C in down link
iloopback utilizes, and as the light carrier of upward signal, utilizes lithium niobate Mach-Zehnder modulator by e
ibe loaded into C
iupper, form signal F
i, be transmitted through the fiber to distant-end node;
Uplink processing module at far-end switching node: main devices is wavelength division multiplexer; Uplink optical signal F from N base station
1, F
2..., F
i..., F
nvia wavelength division multiplexer, be combined into a road light signal, by optical fiber, pass central station back;
Up link receiver module at central station: main devices comprises Wave decomposing multiplexer, photodetector; Wave decomposing multiplexer is by up N road light signal demultiplexing; Each road light signal is converted to signal of telecommunication e by photodetector
1, e
2..., e
i..., e
n;
For broadcasting the full duplex fibre-optical channel of W band of light local oscillator and transmission uplink and downlink base band or intermediate frequency light signal: mainly comprise standard single-mode fiber, realize effective transmission of up-downgoing light signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310418077.6A CN103516429B (en) | 2013-09-13 | 2013-09-13 | Based on W waveband broadband millimeter wave full duplex cut-in method and the system of local oscillator broadcast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310418077.6A CN103516429B (en) | 2013-09-13 | 2013-09-13 | Based on W waveband broadband millimeter wave full duplex cut-in method and the system of local oscillator broadcast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103516429A true CN103516429A (en) | 2014-01-15 |
| CN103516429B CN103516429B (en) | 2016-03-16 |
Family
ID=49898546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310418077.6A Expired - Fee Related CN103516429B (en) | 2013-09-13 | 2013-09-13 | Based on W waveband broadband millimeter wave full duplex cut-in method and the system of local oscillator broadcast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103516429B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944591A (en) * | 2014-05-13 | 2014-07-23 | 北京邮电大学 | Optical-assistance-based pseudo millimeter wave ultra-broadband signal envelope detecting system and method |
| CN105680949A (en) * | 2016-01-05 | 2016-06-15 | 上海交通大学 | In-band full-duplex radio over fiber communication system based on wavelength division multiplexing |
| CN106452596A (en) * | 2016-10-26 | 2017-02-22 | 国网河南省电力公司信息通信公司 | A WDM-RoF system |
| CN106899355A (en) * | 2017-03-27 | 2017-06-27 | 湖南工学院 | Full light technology microwave receiving system and method |
| CN109067467A (en) * | 2018-09-26 | 2018-12-21 | 南京信息工程大学 | N grade array based on inside and outside combined coding forms photoproduction W-waveband launching technique |
| CN109525318A (en) * | 2018-10-15 | 2019-03-26 | 深圳市太赫兹科技创新研究院 | A kind of full duplex light carrier radio communication system |
| CN110891206A (en) * | 2019-11-12 | 2020-03-17 | 南京邮电大学 | WDM-RoF-PON system based on optical frequency comb and polarization multiplexing |
| CN114039665A (en) * | 2021-11-12 | 2022-02-11 | 大连海事大学 | Multi-carrier frequency generation and reliable transmission method for RoF system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324979A (en) * | 2011-09-09 | 2012-01-18 | 东华大学 | Optical quadruple frequency millimeter wave optical carrier wireless communication system |
| US20120163819A1 (en) * | 2010-12-23 | 2012-06-28 | Electronics And Telecommunications Research Institute | Data transmission apparatus and method for use in separate-type base station |
| CN102710361A (en) * | 2012-06-01 | 2012-10-03 | 华为技术有限公司 | Distributed base-station signal transmission system and communication system |
| CN103051385A (en) * | 2013-01-06 | 2013-04-17 | 北京邮电大学 | Integral wired-wireless optical fiber asymmetric full-duplex access method and system |
-
2013
- 2013-09-13 CN CN201310418077.6A patent/CN103516429B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120163819A1 (en) * | 2010-12-23 | 2012-06-28 | Electronics And Telecommunications Research Institute | Data transmission apparatus and method for use in separate-type base station |
| CN102324979A (en) * | 2011-09-09 | 2012-01-18 | 东华大学 | Optical quadruple frequency millimeter wave optical carrier wireless communication system |
| CN102710361A (en) * | 2012-06-01 | 2012-10-03 | 华为技术有限公司 | Distributed base-station signal transmission system and communication system |
| CN103051385A (en) * | 2013-01-06 | 2013-04-17 | 北京邮电大学 | Integral wired-wireless optical fiber asymmetric full-duplex access method and system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944591A (en) * | 2014-05-13 | 2014-07-23 | 北京邮电大学 | Optical-assistance-based pseudo millimeter wave ultra-broadband signal envelope detecting system and method |
| CN103944591B (en) * | 2014-05-13 | 2016-03-30 | 北京邮电大学 | The pseudo-millimeter wave ultra-wideband signal envelope detection system auxiliary based on optics and method |
| CN105680949A (en) * | 2016-01-05 | 2016-06-15 | 上海交通大学 | In-band full-duplex radio over fiber communication system based on wavelength division multiplexing |
| CN106452596A (en) * | 2016-10-26 | 2017-02-22 | 国网河南省电力公司信息通信公司 | A WDM-RoF system |
| CN106452596B (en) * | 2016-10-26 | 2018-10-02 | 国网河南省电力公司信息通信公司 | A kind of WDM-RoF systems |
| CN106899355A (en) * | 2017-03-27 | 2017-06-27 | 湖南工学院 | Full light technology microwave receiving system and method |
| CN109067467A (en) * | 2018-09-26 | 2018-12-21 | 南京信息工程大学 | N grade array based on inside and outside combined coding forms photoproduction W-waveband launching technique |
| CN109067467B (en) * | 2018-09-26 | 2021-06-01 | 南京信息工程大学 | N-level array forming photoproduction W wave band transmitting method based on internal and external joint coding |
| CN109525318A (en) * | 2018-10-15 | 2019-03-26 | 深圳市太赫兹科技创新研究院 | A kind of full duplex light carrier radio communication system |
| CN110891206A (en) * | 2019-11-12 | 2020-03-17 | 南京邮电大学 | WDM-RoF-PON system based on optical frequency comb and polarization multiplexing |
| CN110891206B (en) * | 2019-11-12 | 2022-02-08 | 南京邮电大学 | WDM-RoF-PON system based on optical frequency comb and polarization multiplexing |
| CN114039665A (en) * | 2021-11-12 | 2022-02-11 | 大连海事大学 | Multi-carrier frequency generation and reliable transmission method for RoF system |
| CN114039665B (en) * | 2021-11-12 | 2023-10-31 | 大连海事大学 | Multi-carrier frequency generation and reliable transmission method for RoF system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103516429B (en) | 2016-03-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103516429B (en) | Based on W waveband broadband millimeter wave full duplex cut-in method and the system of local oscillator broadcast | |
| CN101742738B (en) | Full duplex optical carrier radio frequency RoF link system | |
| CN103051385B (en) | The optical fiber asymmetric full-duplex cut-in method that a kind of wire and wireless merges and system | |
| CN101399618B (en) | Optical line terminal, passive optical network and radio frequency signal transmission method | |
| CN103414516B (en) | Based on two-way wire/wireless mixed light cut-in method and the system of same/heterodyne detection | |
| CN101217316B (en) | An OFDM optical fiber wireless communication method and system based on phase modulator | |
| CN112532325A (en) | Multi-dimensional multiplexing photon terahertz communication system | |
| CN103490823B (en) | A kind of source generating device of many microwave local oscillations based on microwave photon | |
| CN101001126B (en) | Optical mm wave generating and wavelength reuse method and system in all-duplex communication radio Over-Fiber | |
| CN103457902A (en) | WDM-PON wired/wireless selectable access system and method | |
| CN103248427A (en) | RoF-PON hybrid access system | |
| CN101521962B (en) | System for generating single side band high-frequency optical fiber millimeter wave and reusing wavelength | |
| CN102136877A (en) | 60GHz millimeter wave based broadband access (BBA) system and method in high-speed rails | |
| CN102006137B (en) | Method and system for generating multi-frequency millimeter wave and applying same to multi-base station ROF communication system | |
| JP2014106492A (en) | Apparatus and method for processing optical signal | |
| CN204481832U (en) | A kind of based on light comb and the ROF-PON full duplex system of carrier reuse | |
| JP2020109887A (en) | Optical transmission method and optical transmission device | |
| CN101714899A (en) | Optical fiber radio communication system | |
| CN101982983A (en) | Method for generating millimetre waves by utilizing semiconductor optical amplifier (SOA) and method and device for applying millimetre waves in radio over fiber (ROF) communication system | |
| CN101136705B (en) | Full optical subcarrier demodulator and method of millimeter wave optical fiber radio uplink | |
| CN102684791B (en) | Wired and wireless converged communication system, wired and wireless converged communication method and method and device for generating multi-waveband signals | |
| CN111447011B (en) | Optical modulation system and method for wireless backhaul and cooperative communication | |
| CN101094038A (en) | Method and device for generating millimeter wave and reuse of wavelength in optical fiber wireless communication system | |
| CN101217317A (en) | A millimeter wave generation method and system with single phase modulator | |
| CN106100753A (en) | Two-way wire and wireless mixed light cut-in method based on optical phase modulator and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160316 Termination date: 20210913 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |