CN101742675A - Device for realizing access of multiple information resources - Google Patents
Device for realizing access of multiple information resources Download PDFInfo
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- CN101742675A CN101742675A CN200810226892A CN200810226892A CN101742675A CN 101742675 A CN101742675 A CN 101742675A CN 200810226892 A CN200810226892 A CN 200810226892A CN 200810226892 A CN200810226892 A CN 200810226892A CN 101742675 A CN101742675 A CN 101742675A
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Abstract
The invention discloses a device for realizing the access of a plurality of information resources. The device comprises a downlink unit and an uplink unit, wherein the downlink unit is used for compositing an original data signal with each standard signal of mobile communication after modulating the original data signal, performing photoelectric conversion on a composite signal, and dividing the converted composite signal into at most eight selfsame composite optical signals for outputting; and the uplink unit is used for performing the photoelectric conversion on the at most eight received composite optical signals respectively, compositing the at most eight converted electric signals, separating each corresponding standard signal of the mobile communication and a data signal from a composite electric signal, recovering the data signal into the original data signal through demodulation, and sending the original data signal to respective information resource. The device realizes the access of the information resource of an overall transmission system, converts the information to be transmitted into spectral transmission, and meets the access requirement on the plurality of information resources.
Description
Technical field
The present invention relates to the mobile communication technical field of access networks, particularly realize the device that plurality of information resources inserts.
Background technology
In current access network construction, insert requirement for satisfying the multi-service signal, as Ethernet, CATV (CableTelevision, cable TV), signals such as CDMA, GSM, adopt ultra broadband, super low consumption, fiber medium cheaply, become the target of generally pursuing in the industry.Yet because the transmission feature and the node processing equipment difference of miscellaneous service standard signal are bigger, adopt any transmission and node processing mechanism, when transmitting and handling other service signals, all compare difficulty.Therefore generally adopt the mode of independent networking, parallel development in the actual construction of present network, miscellaneous service is monopolized one road optical fiber, and can't transmit with other signals are fine altogether, causes the optical fiber utilance low, can not give full play to the bandwidth of an optical fiber resources advantage.Lay and condition that fiber resource is limited under, certainly will bring difficulty for increasing new business.Therefore, the current unified access method of needing a kind of Access Network badly, the station access network of all communication networks such as building can compatible fixed network, Broadcasting Cable Network and 2G, 3G mobile radio communication solves system-wide unified access of communication network.
But existing all multi-access modes are inapplicable because standard is different, or frequency band is narrow all can not implement many nets and merge, can not make up separately and can implement the unified station access network that multiple source inserts, as:
EPON (Ethernet Passive Optical Network, Ethernet passive optical network) and GE-PON (GHz Ethernet Passive Optical Network, what gigabit ethernet passive optical network) adopt is American-European standard, is not suitable as unified station access network;
ADSL (Asymmetrical Digital Subscriber Loop, ADSL (Asymmetric Digital Subscriber Line)) provides the bandwidth of up 640kbps, descending 8Mbps on 1 pair of twisted-pair feeder, limited bandwidth is also inapplicable;
The merging that POI (Point of Interface, many nets close channel platform) can only solve the mobile communication signal of several standard systems; BBU (Baseband Unit, base band resource pool/base band shared resource pond/baseband pool/Base Band Unit)+RRU (Remote Radio Unit, remote radio unit (RRU)) subject matter is that frequency band is narrow, can not realize that many nets merge;
The device systems subject matter of U.S. LGC wireless device company also is that frequency band is narrow, can not realize that many nets merge;
General traditional repeater relaying (RFPA, Radio Frequency Power Amplifier, radio-frequency power amplifier), comprise channel selection type repeater, Frequency Band Selection type repeater, broad band repeater etc., topmost problem is that frequency band is narrow equally, can not realize that many nets merge;
CATV (Cable Television, cable TV) can only transmitting television signals.
Summary of the invention
In view of this, the object of the present invention is to provide the device of realizing that plurality of information resources inserts, be used to realize the system-wide unified access of communication network, the waste of avoiding overlapping construction and causing.
For achieving the above object, the invention provides a kind of device of realizing that plurality of information resources inserts, comprising:
The down link unit after being used for original data signal modulated, closes the road with each standard signal of mobile communication, and through the electric light conversion, the composite optical signal after will change again is divided into identical 8 road composite optical signals at the most and exports;
Uplink elements, 8 road composite optical signals at the most that are used for receiving carry out opto-electronic conversion respectively, and 8 road signals of telecommunication at the most after will changing close the road, isolate each standard signal and the data-signal of corresponding mobile communication the road signal of telecommunication after closing the road, data-signal is reduced to original data signal through demodulation again, sends to information source separately.
The present invention all inserts all information source information that will insert in the 500kHz-3GHz frequency band (data message is modulated in the 500kHz-3GHz frequency band) by modes such as power splitter, mixer, electric bridges, and whole the moving on the spectrum of radio frequency bandwidth transmitted, thereby realized that the unified of multi-service signal inserts and fine altogether transmission by the light-to-current inversion technology.
Description of drawings
Fig. 1 realizes the structure drawing of device that plurality of information resources inserts in the embodiments of the invention;
Fig. 2 is the fundamental diagram of professional mixer in the embodiments of the invention;
Fig. 3 is the structure chart of professional mixer in the embodiment of the invention;
Fig. 4 is the fundamental diagram of electric bridge in the embodiment of the invention;
Fig. 5 is the structure chart of monitoring module in the embodiment of the invention;
Fig. 6 is the structure chart of supply module in the embodiments of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The device that the realization plurality of information resources that the embodiment of the invention provides inserts can adapt to the multiple network standard, the 3G network of containing present existing 2G network and scale networking soon, except that mobile communications network, also comprise wireless data communication network etc., be specially cordless communication networks such as GSM/DCS/CDMA/PHS/TD-SCDMA/WCDMA/CDMA2000/WLAN.
The structure drawing of device that the realization plurality of information resources that Fig. 1 provides for the embodiment of the invention inserts specifically describes as follows: on down direction,
Become frame module, be used for original data signal being carried out framing and handle, add control command and ensure that receiving terminal can normally transmit and receive data, and do not produce data collision by the point-to-multipoint control protocol.
The core content of point-to-multipoint control protocol is how to pass through time division multiplexing mode, guarantees that each receiving terminal can normal uplink and downlink transmit data, does not clash, or after clashing, by the influence that certain means manage conflict, guarantees normal transfer of data.Be example with the ALOHA agreement below, point-to-multipoint control protocol mode of operation be described:
Descending employing broadcast mode, each terminal determines whether to be this end message, selective reception by the address information in the downlink broadcast frame.Up employing is as long as the user has data to send, although just allow them send.Certainly, thus can produce like this conflict cause frame destruction.By the feedback of downlink broadcast channel, transmit leg can carry out collision detection in sending the process of data, and the data that receive and the data of buffering area are compared, and just can know whether Frame is destroyed.Same reason, other users also are according to this process work.If transmit leg is known Frame and suffers to destroy (promptly detecting conflict) that it can wait for one section with retransmitting this frame after captain's time so.
Above-mentioned agreement realizes simple, but as easy as rolling off a log generation conflict, channel utilization is low.Improve channel utilization and can adopt time slot A LOHA agreement, its core is to unify user's data with clock to send.Way is that the time is divided into discrete timeslice, and the user must wait until that at every turn next timeslice could begin to send data, thereby has avoided the user to send the randomness of data, has reduced data and has produced the possibility of conflict, has improved the utilance of channel.
Modulation module is used for the data signal modulation after the framing to selected carrier frequency.
Professional mixer utilizes power splitter, mixer, electric bridge that each standard source signal of radio communication is closed the road, and other through ovennodulation, arrives 500kHz-3GHz frequency range with data signal modulation with data-signal, and closes the road with described each wireless communication signals.All kinds of downlink radio-frequency signals are merged by professional mixer, require to have different allocation plans to solve according to different accesses.Radio communication services such as GSM900, DCS1800, TD-SCDMA, WLAN are arranged as the business demand for Co., Ltd of China Mobile, have at this demand and close the road allocation plan accordingly.Demand for users such as UNICOM, telecommunications, broadcasting and TV, sub-district property also has other different allocation plans.
Electrical optical converter, the compound electric signal that is used for closing behind the road is converted to composite optical signal.Because output signal transmits by optical cable, therefore the compound electric signal of closing behind the road to be converted to composite optical signal.Carry out the conversion of electric light through electrical to optical converter, rf signal is moved spectrum transmit.
Optical branching device is used for the composite optical signal after the conversion along separate routes, and composite optical signal is divided into identical multichannel composite optical signal output, and each road composite optical signal is identical.In embodiments of the present invention, can be divided into 8 road composite optical signals at most.Why being called composite optical signal, is to have comprised mobile communication downlink signals such as CDMA, GSM because of the light signal that closes after road and electric light are changed, and data-signal.
By with uplink downlink, utilize power splitter, mixer, electric bridge etc. to close the road to each standard of mobile communication, in addition with data-signal through ovennodulation, data signal modulation is arrived the 500kHz-3GHz frequency range, and close the road with above-mentioned each signal, and carry out the conversion of electric light through electrooptic switching element, radiofrequency signal is moved spectrum, carry out the shunt of light signal to optical branching device again, light signal is equally divided into 8 tunnel outputs at the most.
On up direction, comprise:
Multichannel photoelectric transformer, the multichannel composite optical signal that is used for receiving are converted to corresponding multi-channel electric signal respectively, and the multi-channel electric signal after the conversion is closed the road, synthetic one road signal of telecommunication.In embodiments of the present invention, can carry out the light-to-current inversion of 8 road composite optical signals at most simultaneously.The purpose of closing the road is that multi-service is transmitted by unified path, a radio frequency mouth access back, and signal closes the road and realizes that by the power splitter reversal connection power splitter is a power divider, is R with characteristic impedance in fact exactly
0The input transmission line be divided into N bar impedance phase with branch line.
Professional splitter is used for road compound electric signal after merging is carried out business along separate routes, is shunted to each standard source signal and data-signal of radio communication.Be that the reaction of closing the road is used along separate routes, be to utilize the signal of the characteristic different frequency of microwave never to export with the path port, the band separation method utilizes the band pass filter principle to realize, so-called band is logical be exactly allow they in the assigned frequency scope by (impedance of inductance, the impedance of electric capacity are all relevant with the frequency of electric weight, utilize this principle, can remove the electric weight of characteristic frequency selectively).
Demodulation module is used for the signal of the demodulated data signal framing of the modulation that will obtain along separate routes.
Separate frame module, be used for the original form that framing signals is reduced into data-signal being exported to miscellaneous equipment, and extract point-to-multipoint control protocol the corresponding command that remote equipment sends by the point-to-multipoint control protocol.
Among the figure
The expression optical cable.
By above up link, 8 road light signals at the most that receive are carried out the conversion of photoelectricity through No. 8 photoelectric transformers at the most, 8 tunnel radiofrequency signals at the most that demodulation from spectrum is come out are closed the road through signal combiner, the wide frequency RF signal that closes behind the road enters professional splitter carries out each business by the band separation method separation, isolate the upward signal of corresponding each standard of mobile communication (as CDMA, GSM, DCS, WCDMA, TD-SCDMA etc.), data-signal is reduced to data message through demodulation again, returns information source separately.
Except above up link and down link, in device shown in Figure 1, also further comprise:
Monitoring module, be used for to gather the information of all modules by the interface that links to each other with other each module, and by 232 serial ports and MODEM (tracking exchage modulator-demodulator, the wireless communication facility of similar mobile phone, realize the wireless transmission of data message) connect and can realize that the long-range of information reports, and can be connected with computer by local 232 interfaces, realize local monitor to equipment.The module that monitoring module can be monitored comprises electrical optical converter, signal combiner and point-to-multipoint control module.
Supply module is used for by the conversion to alternating current, is transformed to the required direct current of each module work, supply equipment self work.It also has the electric current distribution function, the direct current of input can be shunted, and by each port output, powers to remote equipment.
The point-to-multipoint control module is used for sending the point-to-multipoint control command to becoming frame module to conciliate frame module.
More than device all inserts all information source information that will insert in the 500kHz-3GHz frequency band (data message is modulated in the 500kHz-3GHz frequency band) by modes such as power splitter, mixer, electric bridges, and whole the moving on the spectrum of radio frequency bandwidth transmitted, thereby realized that the unified of multi-service signal inserts and fine altogether transmission by the light-to-current inversion technology.
As shown in Figure 2, be the fundamental diagram of professional mixer in the embodiment of the invention, Fig. 3 is the structure chart of professional mixer, elaborates the structure and the operation principle of professional mixer below in conjunction with Fig. 2 and Fig. 3, and this business mixer specifically comprises:
Power splitter is a power divider, is R with characteristic impedance in fact exactly
0The input transmission line be divided into N bar impedance phase with branch line.The present invention uses the mixed type power splitter, and its each road output port is all by an isolation resistance R
0Link to each other with common node, its output coupling is good, and has increased the isolation between the output.Because after a signal is defeated by power splitter, because the symmetry of circuit structure will make input power be divided into equal-sized N part output.
Electric bridge inside is made up of the transmission line that one group of (two) degree of coupling is 3dB, as Fig. 4.1 mouthful of input, then signal is from 2 mouthfuls and 4 mouthfuls 1/2,3 mouthful of no signal output of respectively exporting input signal as signal; 3 mouthfuls of signal inputs, then signal is from 2 mouthfuls and 4 mouthfuls 1/2,1 mouthful of no signal output of respectively exporting input signal; As 1 mouthful of power W1 of input, import 3 mouthfuls of power W2, then 2 mouthfuls and 4 mouthfuls of each output (W1+W2)/2.What as seen, electric bridge can be finished signal closes road and along separate routes function again.
Mixer is made up of inner wire, joint mounting screw, joint, nut, pad, absorption circuit, cavity, cover plate, mounting screw, frequency tuning screw, coupling tuning screw, inner wire mounting screw, polytetrafluoroethylene piece etc.Cavity comprises a plurality of loculuses, realizes coupling by coupling aperture between each loculus, at cavity bottom the inner wire of installing by the inner wire pilot nail is arranged, and absorption circuit passes the groove that through hole in the polytetrafluoroethylene piece is installed in adjacent chambers.
Mixer is the characteristic of utilizing microwave different frequency different wave length by various combination such as the numerous inner wire length in inside, cavity size and cooperates the isolation that is used for finishing the different wave length frequency that makes of absorption circuit.
Frequency range is fixed on the frequency range of requirement by the tuning screw of adjusting frequency, every road cavity is adjusted respectively and is realized every road cavity by the obstructed frequency range that requires, and cooperates by the frequency tuning nail and the tuning nail that is coupled and adjusts the insulation request that reaches between two frequency ranges of closing the road.
Isolate lessly between the every road of power splitter, can be used to close the less frequency range of road insulation request, close the road purpose by what being used of power splitter and mixer reached that final multiband one goes into to have more.
Be modulated on 1000-1700MHz (being modulated to the frequency range that the existing 500kHz-3GHz does not use) frequency by existing modulator approach for data-signal, close the road with other standards again.For each standard signal of mobile communication, as, the CDMA signal is modulated into 870-880MHz, and the GSM signal is modulated into 930-960MHz, or the like, as shown in Figure 2.The user capacity of overall network carrying is huge, as long as can satisfying, the output signal of far-end unit distributes the needs that cover, the signal of near-end input can insert the near-end unit in theory as long as in the 500kHz-3GHz frequency range, transmits by optical fiber after being converted to light signal.
As shown in Figure 5, the structure chart for embodiment of the invention monitoring module specifically comprises:
Its core is a central processing unit, adopts the ARM single-chip microcomputer, as: TQFP-144-LPC2214.
Peripheral configuration comprises:
The interface level conversion chip is realized the requirement of input and output level, adopts the suitability for industrialized production chip that has been.
Indicator unit can show the state of equipment intuitively by the array indicator light, for the two states that defines every kind of function can be realized with dichromatic LED.For example, can show itself operating state and with the operating state of next stage expanding element, state has power supply status, Link State, chain circuit alarming or the like up and down.
Stand-by power supply is used for can carrying out floating charge to battery at ordinary times, switches to stand-by power supply work when outage, makes the unlikely interruption of communication function.
Wireless modem, as: GTM900B, central processing unit is communicated by letter with wireless modem by 232 serial ports, facility information is issued wireless modem by 232 serial ports, MODEM counts the biography mode by short message or GPRS and issues the remote monitoring that Surveillance center realizes equipment, satisfies that the user is home-confined can to see equipment working state.Microprocessor is responsible for controlling the work of whole device, and this integrated circuit TQFP-144-LPC2214 connects EEPROM by it self P1 mouth, the little X5045 of EEPROM integrated circuit, and the record significant data can be preserved, and can be revised at any time in power down; Its P3 mouth connects indicator unit, and the P0 mouth is the data/address bus that data/address bus connects the 12bit A/D conversion circuit, and P2 is the address strobe line of A/D conversion circuit; The interface level conversion chip is connected by MAX233, the data message that device interior is indicated with Transistor-Transistor Logic level can be carried out level conversion, is changed by data/address bus by analog-to-digital conversion circuit and passes to microprocessor.
Reserve battery provides power down protection for its supplementary module.
Wireless remote is connected to wireless data transfer module and inserts mobile communication network by the connector external antenna, and is inner by master board RXD, the control of TXD serial ports, and transfer of data to the computer software monitor supervision platform of far-end, is write down, handles.
Can carry out Monitoring and Controlling to the module of forming in unit at different levels and the unit at different levels by above monitoring module, finish gathering and transmission of information, make things convenient for the operational administrative of user equipment.
As shown in Figure 6, the figure for embodiment of the invention supply module specifically comprises:
The first half of AC-DC conversion unit: Fig. 6 is the AC-DC conversion unit, is used to realize the conversion of equipment self power pack, alternating current is converted to the direct current of respective strengths.
The latter half of remote power feeding allocation units: Fig. 6 is the remote power feeding allocation units, is used for realizing the DC48 input is converted to 8 tunnel outputs at the most, for the equipment use of far-end.
Supply module at first passes through power-supply filter filtering to exchanging the AC input, prevent because the electromagnetic interference that the power supply aspect is brought, filtered alternating current changes direct current DC module through AC and becomes direct current 48V output, and this direct current 48V changes the DC module through two DC again and is converted to each cell operation use in direct current 12V and the direct current 5V output supply equipment respectively; Equipment is supported the DC48V input simultaneously; the 48V input is after the protection of both positive and negative polarity protection bridge; prevent because of both positive and negative polarity reversal connection burning apparatus; changeing the DC module converts through two DC equally after the input is that direct current 12V and direct current 5V output supply equipment self use; the DC48V of input also is divided into 8 tunnel outputs (mainly having done the current limliting processing) at the most through current distribution unit, and the equipment use of the electric current of every road 1A for far-end is provided.
Except with upper module, realize in the device that plurality of information resources inserts that other module is as the multichannel photoelectric transformer, to receive at the most by the PIN pipe, the every road of 8 road light signals be demodulated into the signal of telecommunication respectively, close the road by 8 road signals of telecommunication at the most of radio frequency mixer after then with demodulation, the broadband rf signal that closes behind the road is unified to amplify, remedy radiofrequency signal because the gain loss that transmission and photoelectricity variation bring, the signal after the amplification was exported low pass filter will be modulated to ultra-low frequency fsk signal demodulation come out (digital demodulation signal that will monitor usefulness comes out); Electrical optical converter is by the FP or the Distributed Feedback Laser (light-emitting diode) of suitability for industrialized production are realized; Optical branching device is a kind of application-specific form of fiber coupler, is similar to the radio frequency splitter, and one road light signal is divided into many branch roads, is to be combined by the most basic coupler, and how required the more composition coupler quantity of the port that needs is many more; The reaction that professional splitter is a mixer is used; Signal combiner then is the shared delivery outlets of a plurality of filters.
In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (8)
1. a device of realizing that plurality of information resources inserts is characterized in that, comprising:
The down link unit after being used for original data signal modulated, closes the road with each standard signal of mobile communication, and through the electric light conversion, the composite optical signal after will change again is divided into identical 8 road composite optical signals at the most and exports;
Uplink elements, 8 road composite optical signals at the most that are used for receiving carry out opto-electronic conversion respectively, and 8 road signals of telecommunication at the most after will changing close the road, isolate each standard signal and the data-signal of corresponding mobile communication the road signal of telecommunication after closing the road, data-signal is reduced to original data signal through demodulation again, sends to information source separately.
2. device according to claim 1 is characterized in that, described down link unit specifically comprises:
Become frame module, be used for original data signal being carried out framing and handle by the point-to-multipoint control protocol;
Modulation module is used for the data signal modulation after the framing to selected carrier frequency;
Professional mixer is used for each standard signal of mobile communication and the data-signal after the described modulation are closed the road;
Electrical optical converter, the electrical signal conversion that is used for closing behind the road is a composite optical signal;
Optical branching device is used for the composite optical signal after the conversion along separate routes, and described composite optical signal is divided into identical multichannel composite optical signal output.
3. device according to claim 1 and 2 is characterized in that, described uplink elements specifically comprises:
Multichannel photoelectric transformer, the multichannel composite optical signal that is used for receiving are converted to corresponding multi-channel electric signal respectively, and the multi-channel electric signal after the described conversion is closed the road, synthetic one road signal of telecommunication;
Professional splitter is used for road compound electric signal after merging is carried out business along separate routes, is shunted to each standard signal and the data-signal of mobile communication;
Demodulation module is used for the data-signal of the demodulated data signal framing of the modulation that will obtain along separate routes;
Separate frame module, be used for data-signal with described framing and be reduced into original data signal and export to miscellaneous equipment.
4. device according to claim 3 is characterized in that, this device further comprises:
Monitoring module, be used for gathering the information of all modules by the interface that links to each other with other each module, and be connected the long-range of the information of carrying out by serial ports with the tracking exchage modulator-demodulator and report, can be connected with computer by local interface, realize local monitor to equipment.
5. device according to claim 4 is characterized in that, this device further comprises:
Supply module is used for by the conversion to alternating current, is transformed to the required direct current of each module work, supply equipment self work; And by the electric current distribution function, the direct current of input is shunted, by each port output, power to remote equipment;
The point-to-multipoint control module is used for sending the point-to-multipoint control command to becoming frame module to conciliate frame module.
6. device according to claim 3 is characterized in that, described monitoring module specifically comprises:
Central processing unit is used for other module of this device is carried out Monitoring and Controlling, finishes gathering of information;
Radio modem is used for the described message transmission that gathers is handled to Surveillance center.
7. device according to claim 6 is characterized in that, this monitoring module further comprises:
Stand-by power supply is used for battery is carried out floating charge, and equipment switches to stand-by power supply work when outage, makes the unlikely interruption of communication function;
The interface level conversion chip, being used for external electric flatted turn is changed to the level that described central processing unit can be discerned;
Indicator unit is used for the operating state of equipment is shown intuitively.
8. device according to claim 5 is characterized in that, described supply module specifically comprises:
The AC-DC conversion unit is used to realize the conversion of equipment self power pack, alternating current is converted to the direct current of respective strengths;
The remote power feeding allocation units are used for realizing the direct current input is converted to 8 tunnel outputs at the most, for the equipment use of far-end.
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| CN102547772A (en) * | 2010-12-24 | 2012-07-04 | 中国移动通信集团北京有限公司 | Method and device for signal distribution system shared by plurality of communication networks |
| CN102547773A (en) * | 2011-12-15 | 2012-07-04 | 四川邮科通信技术有限公司 | Wireless multi-band optical distributed coverage system |
| CN103237366A (en) * | 2013-04-16 | 2013-08-07 | 杭州都冠通讯设备有限公司 | Mobile communication network integrated access device |
| CN104184522A (en) * | 2013-05-24 | 2014-12-03 | 慧流系统整合股份有限公司 | Optical fiber communication device and optical fiber communication terminal with same |
| CN104618916A (en) * | 2015-01-20 | 2015-05-13 | 中国铁塔股份有限公司无锡市分公司 | Efficient multisystem combiner platform |
| CN105491689A (en) * | 2015-11-24 | 2016-04-13 | 京信通信技术(广州)有限公司 | Public transmission extension system and device |
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| CN102547772B (en) * | 2010-12-24 | 2014-09-10 | 中国移动通信集团北京有限公司 | Method and device for signal distribution system shared by plurality of communication networks |
| CN102547772A (en) * | 2010-12-24 | 2012-07-04 | 中国移动通信集团北京有限公司 | Method and device for signal distribution system shared by plurality of communication networks |
| CN102547773A (en) * | 2011-12-15 | 2012-07-04 | 四川邮科通信技术有限公司 | Wireless multi-band optical distributed coverage system |
| CN103237366B (en) * | 2013-04-16 | 2016-12-28 | 陈林木 | A kind of mobile communications network integrated access device |
| CN103237366A (en) * | 2013-04-16 | 2013-08-07 | 杭州都冠通讯设备有限公司 | Mobile communication network integrated access device |
| CN104184522A (en) * | 2013-05-24 | 2014-12-03 | 慧流系统整合股份有限公司 | Optical fiber communication device and optical fiber communication terminal with same |
| CN104618916B (en) * | 2015-01-20 | 2017-10-13 | 中国铁塔股份有限公司无锡市分公司 | Efficient multisystem mixing platform |
| CN104618916A (en) * | 2015-01-20 | 2015-05-13 | 中国铁塔股份有限公司无锡市分公司 | Efficient multisystem combiner platform |
| CN105491689A (en) * | 2015-11-24 | 2016-04-13 | 京信通信技术(广州)有限公司 | Public transmission extension system and device |
| CN107909956A (en) * | 2017-09-20 | 2018-04-13 | 友达光电股份有限公司 | Display device |
| CN107911318A (en) * | 2017-11-07 | 2018-04-13 | 广州飞瑞敖电子科技股份有限公司 | A kind of integrated industrial internet exchange system |
| CN107911318B (en) * | 2017-11-07 | 2021-06-22 | 广州飞瑞敖电子科技股份有限公司 | Integrated industrial network switching system |
| WO2020055843A1 (en) * | 2018-09-10 | 2020-03-19 | Caci, Inc. - Federal | Deployable radio units |
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| US11075441B2 (en) | 2018-09-10 | 2021-07-27 | CACI, Inc.—Federal | Deployable radio units |
| AU2019339315B2 (en) * | 2018-09-10 | 2021-12-09 | Caci, Inc. - Federal | Deployable radio units |
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