CN105743582A - Multi-service access digital-analog hybrid networking all-optical distributed system - Google Patents
Multi-service access digital-analog hybrid networking all-optical distributed system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
- H04B10/25754—Star network topology
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Abstract
The invention relates to a multi-service access digital-analog hybrid networking all-optical distributed system. The multi-service access digital-analog hybrid networking all-optical distributed system comprises a digital access unit, a digital extension unit and an analog zoom-out unit, wherein the digital access unit and the digital extension unit are provided with signal forwarding connections; a signal allocation port of the digital extension unit is provided with an analog zoom-out unit connection; the digital access unit comprises a first radio-frequency processing unit (U1) and a first digital processing unit (U2) which are connected to construct an uplink and a downlink; the digital extension unit comprises a second digital processing unit (U4), a second radio-frequency processing unit (U5) and a first analog photoelectric conversion unit (U6) which are connected to construct an uplink and a downlink; and the analog zoom-out unit comprises a second analog photoelectric conversion unit (U8), a third radio-frequency processing unit (U9) and an antenna unit (U10) which are connected to construct an uplink and a downlink. The multi-service access digital-analog hybrid networking all-optical distributed system is a novel distributed system which can support a plurality of services such as 2G services, 3G services, TDDLTE (Time Division Duplexing Long Term Evolution) services and FDDLTE (Frequency Division Duplexing Long Term Evolution) services, and is applied to deep coverage of wireless communication signals such as 2G signals/3G signals/4G signals.
Description
Technical field
The present invention relates to the full light distributed system of the numerical model analysis networking of a kind of multi service access; particularly to a kind of indoor and outdoors numerical model analysis networking optical fiber multi-service distributed system; this system is mainly used in villages within the city, large stadium, office building, many nets co-sited and the multi-service signal depth netted under the special screnes such as different station more and covers and networking, the invention belongs to the communications field.
Background technology
With its networking flexibility, system gain, with optical path loss, the advantage such as change is not widely used digital optical-fiber remote system in recent years, covers the multiple Operation Network such as 2G, 3G, 4G.nullFast development is being carried out due to radio communication，From first generation simulation mobile communication to 2G、The commercialization of 3G and LTE(LongTermEvolution，Long Term Evolution) beforehand research before and after course also only have more than ten years time，The simultaneous situation of multiple communication network is all there is in operator in networking，The communication network that major part operator is runing generally has two or more，Domestic such as China Mobile of mobile communication producer，Just there is GSM900、DCS1800、TD-SCDMA2000、TDDLTE，China's joint communication has GSM900、DCS1800、WCDMA2100、FDDLTE，There is CDMA in China Telecom、FDDLTE，Multiple network is also deposited and is meant that digital RF far-drawing system can take the network by multiple types or frequency range to carry out fiber-optic transfer after merging，Overlapping investment and the property that so can reduce networking are coordinated.
But owing to wireless signal is had serious decay and shielding action by building, large-scale at some be indoor venue, office building, underground garage and villages within the city, there is a lot of blind areas then cellphone subscriber and cannot use.Meanwhile, along with the growth of mobile service, owing to 2G and 3G business downstream rate is relatively low, it is difficult to meet the current intelligent terminal user experience perceptibility to data service.
In installation and networking, traditional digital fiber system is all adopt to build feeder network realization, by passive combiner part, multiple-frequency signal is fused to antenna feeder end to realize covering, the radiation problem of antenna has caused the fear of people, causes that the operator's a lot of networking system in community and office building are complained and removed.And although the digital optical fiber distribution system grown up on this basis can solve above-mentioned problem, but owing to far-end adopts digital fiber to be transmitted processing, far-end must have digital processing chip such as FPGA, the chips such as digital-to-analogue conversion AD, DA, causing that far-end power consumption and cost are higher, so in whole system is arranged net, economic benefit is just relatively low.
Summary of the invention
The technical problem to be solved is the difficulty overcoming prior art to exist, it is provided that the full light distributed system of numerical model analysis networking of a kind of multi service access, provides the user 2G, 3G, 4G wireless signal access service.
The technical solution used in the present invention is:
A kind of numerical model analysis networking full light distributed system of multi service access; unit, simulation extension unit is expanded including Digital Access unit, numeral; Digital Access unit and digital unit of expanding are provided with signal forwarding connection, and the signal distribution port of numeral expansion unit is provided with simulates extension unit connection；Described Digital Access unit includes connecting to form the first RF processing unit of uplink downlink, the first digital processing element；Described numeral is expanded unit and is included connecting to form the second digital processing element of uplink downlink, the second RF processing unit, the first analog photoelectricity converting unit；Described simulation extension unit includes connecting to form the second analog photoelectricity converting unit of uplink downlink, the 3rd RF processing unit, antenna element；In downlink, first RF processing unit of described Digital Access unit realizes being converted to downlink radio-frequency signal descending intermediate-freuqncy signal, first digital processing element realizes descending IF signal processing is transformed to baseband signal, is then converted into optical signal transmission and expands unit to numeral；Numeral is expanded the second digital processing element of unit and the optical signal transmitted by Digital Access unit is converted to digital signal, isolate baseband signal and be converted to descending intermediate-freuqncy signal, descending intermediate-freuqncy signal frequency conversion is downlink radio-frequency signal by the second RF processing unit, converts radiofrequency signal to analog optical signal by the first analog photoelectricity converting unit and is transferred to simulation extension unit；The analog optical signal expanding unit from numeral is converted to radio frequency downstream signal and is transferred to RF processing unit and carries out processing and amplify signal by the second analog photoelectricity converting unit of described simulation extension unit, then transmits to antenna element；In up-link, the antenna element of described simulation extension unit realizes receiving wireless signal, processed after amplifying this upstream radio-frequency signal by the 3rd RF processing unit, being transferred to the second analog photoelectricity converting unit, upstream radio-frequency signal is converted to analog optical signal and is transferred to numeral expansion unit by the second analog photoelectricity converting unit；Described numeral is expanded the first analog photoelectricity converting unit of unit and is received the analog optical fiber signal from extension unit, it is converted into radiofrequency signal, then passing through the second RF processing unit and upstream radio-frequency signal is converted to up intermediate-freuqncy signal, up intermediate-freuqncy signal is transformed to after baseband signal is converted to optical signal and is transferred to Digital Access unit by the second digital processing element；First digital processing element realization of described Digital Access unit is converted to up intermediate-freuqncy signal after isolating baseband signal, and up intermediate-freuqncy signal frequency conversion is upstream radio-frequency signal by the first RF processing unit, and adopts the mode of radio transmission to pass information source back.
Described simulation extension unit farther includes the CPU control unit that the second analog photoelectricity converting unit, the 3rd RF processing unit are controlled.
Described Digital Access unit farther includes the first power supply unit powered respectively to the first RF processing unit and the first digital processing element；Described numeral expands the second power supply unit that unit farther includes to power respectively to the second digital processing element, the second RF processing unit and the first analog photoelectricity converting unit；Described simulation extension unit farther includes the 3rd power supply unit powered respectively to the second analog photoelectricity converting unit, the 3rd RF processing unit, antenna element, CPU control unit.
Farther include Digital Access unit and numeral is expanded and is provided with switch unit between unit.
Described switch unit adopts radio-frequency cable and optical fiber to connect two digital access units respectively, described switch unit includes the 4th RF processing unit, optical path unit, the 4th power supply unit, monitoring control unit, 4th RF processing unit mean allocation enters the radiofrequency signal of switch unit, radiofrequency signal after dividing equally connects two digital access units respectively, monitoring control unit connects optical path unit, and optical path unit connects numeral and expands unit；Optical path unit can switch connection between Digital Access unit, it is achieved selects Digital Access unit and numeral to expand the signal between unit and forwards；4th power supply unit is powered respectively to optical path unit, monitoring control unit.
Described Digital Access unit and numeral are expanded unit and are connected by digital fiber, and numeral expands unit and simulation extension unit is connected by analog optical fiber.
Between described Digital Access unit and numeral expansion unit, the frame format based on CPRI standard agreement carries out framing transmission.
Described Digital Access unit is set to two or more, is not co-located setting between Digital Access unit.
The antenna element (U10) of described simulation extension unit adopts the miniature single polarization multifrequency antenna sheltered.
Described numeral expands unit and simulation extension unit is provided with ONU fiber optic network and realizes star-like network construction form.
The advantage of apparatus of the present invention is:
Optical fiber is all adopted to connect between the full light distributed system unit of numerical model analysis networking of technical scheme multi service access; overcome the distance inferior position of category-5 cable transmission only 100m; simultaneously; system supports up-to-date LTE network; data service is one promote greatly; the transmission means accessing output of multiple business; meet the requirement of operator's many nets Joint construction and sharing; and design the upper design adopting the not co-located access of Digital Access unit; networking is more flexible, and multiplexing not co-siting base stations reaches the effect with covering.Specifically, have the effect that
1) support 2G, 3G, TDDLTE, FDDLTE, etc. multiple services novel compartment system, cover for the wireless communication signals degree of depth such as 2G/3G/4G；
2) Digital Access unit supports Hot Spare, solves the whole distributed system paralysis problem because numeral access unit fault causes；
3) multiservice system, solves many nets coexistence problems, is conducive to operator's Joint construction and sharing；
4) multiservice system, solves base station not co-located, and the area of coverage needs again the requirement that multi-service covers, it may not be necessary to resettlement base station；
5) simulation extension unit integrated micro single polarization multifrequency antenna, does not need separately to build antenna feeder network system；
6) multiservice system, solves the demand of any networking mode, and Digital Access unit supports star-like networking, and numeral is expanded unit and supported star-like networking and chain cascade network；
7) simulation extension unit does not have digital processing and the conversion chips such as FPGA, digital-to-analogue conversion AD, DA, thus very big reduce far-end power consumption, volume, cost.
Accompanying drawing explanation
Fig. 1 is the multi-service numerical model analysis networking full light distributed system main body chain graph of the embodiment of the present invention；
Fig. 2 is the Digital Access unit 1+1 hot backup application schematic diagram of the embodiment of the present invention；
Fig. 3 is the application schematic diagram that the multi-service numerical model analysis networking full light distributed system Digital Access unit of the embodiment of the present invention is not co-located；
Fig. 4 realizes framework map inside the Digital Access unit of the embodiment of the present invention；
Fig. 5 realizes framework map inside the numeral expansion unit of the embodiment of the present invention；
Fig. 6 realizes framework map inside the simulation extension unit of the embodiment of the present invention；
Fig. 7 realizes framework map inside the switch unit of the embodiment of the present invention；
Wherein:
1: Digital Access unit；
U1: the first RF processing unit；U2: the first digital processing element；
U3: the first power supply unit；
2: numeral expands unit；
U4: the second digital processing element；U5: the second RF processing unit；
U6: the first analog photoelectricity converting unit；U7: the second power supply unit；
3: simulation extension unit；
U8: the second analog photoelectricity converting unit；U9: the three RF processing unit；
U10: antenna element；U11:CPU control unit；
U12: the three power supply unit；
4: switch unit；
U13: the four RF processing unit；U14: optical path unit；
U15: the four power supply unit；U16: monitoring control unit.
Detailed description of the invention
Technical solution of the present invention is described in detail below in conjunction with drawings and Examples.
The full light distributed system of numerical model analysis networking of a kind of multi service access that embodiment provides, expands unit 2 and simulation extension unit 3 including Digital Access unit 1, numeral, also sets up switch unit 4 when needs Hot Spare.
As it is shown in figure 1, in main body link, Digital Access unit and numeral are expanded unit and connected by digital fiber, numeral expands unit and simulation extension unit is connected by analog optical fiber；As in figure 2 it is shown, adopt radio-frequency cable and optical fiber to connect between Digital Access unit and switch unit, switch unit and numeral are expanded and are adopted optical fiber to connect between unit.
Digital Access unit and numeral are expanded unit and be can be used alone optical fiber connection, it is also possible to utilize existing ONU fiber optic network, it is achieved digital baseband signal transmits.
Described Digital Access unit has the multiservice functionalitys such as support 2G, 3G, 4G, and 4G network LTE supports that 2 enter the 2 MIMO(multiple-input, multiple-output gone out simultaneously) technology.
Described Digital Access unit, is used for transmitting wireless access business, and Digital Access unit and numeral are expanded data signal between unit and met CPRI(common public radio interface simultaneously) the frame format transmission of standard agreement.
Described switch unit is needing Digital Access unit to support to use under the scene of 1+1 hot backup, and the monitoring information intelligent transmitted by Digital Access unit judges switching state.
Described numeral expands unit can arrange light transceiver interface and the light expansion interface for cascade, while meeting degree of depth covering, it is possible to achieve star-like, chain networking.
Described Digital Access unit can meet the function of 1+1 backup, and when wherein one end Digital Access cell failure and light transmitting-receiving are abnormal, another Digital Access unit realizes backup switching by the mode of Hot Spare.
Described Digital Access unit can meet the function that access unit is not co-located, solves the problem that the different station of many nets is not co-located, it is achieved complicated multi-functional networking and the different station of large-scale networking are with the requirement covered.
The single polarization multifrequency antenna that described simulation extension unit RU integrated micro is sheltered realizes covering requirement.
Described simulation extension unit RU does not have digital processing and the conversion chips such as FPGA, digital-to-analogue conversion AD, DA, thus very big reduces far-end power consumption, volume, cost.
The present invention realizes the operation principle of function:
1) Principle of Signal Transmission is accessed
It is carried out as follows explanation:
In descending process, Digital Access unit accesses the downlink radio-frequency signal of multiple business from information source (RRU or microcell base station end etc.), descending intermediate-freuqncy signal is become after the first RF processing unit U1, and descending intermediate-freuqncy signal is transformed to digital signal, after being wrapped into into, by the first digital processing element U2, the frame format that applicable standard interface protocol (such as CPRI) requires, corresponding light signal is sent to numeral and expands unit 2, numeral is expanded unit and is received optical signal converted baseband digital signal feeding digital processing element 1, isolate base band data, descending intermediate-freuqncy signal frequency conversion is downlink radio-frequency signal by the second RF processing unit U5, downstream signal is converted to analog optical signal through the first analog photoelectricity converting unit U6, it is transferred to simulation extension unit 3 through analog optical fiber；The antenna element U10 that simulation extension unit carries through equipment launches to overlay area, reaches the purpose that signal covers.Simulation extension unit can provide the access of wireless signal.When being embodied as, the concrete module of each unit can adopt the existing chip of prior art to realize.Laser Transmission, optical signal/digital signal conversion, analog/digital conversion etc. is all prior art, adopts respective digital fiber optical transceiver, A/D changer, analog optical fiber transceiver etc., and it will not go into details for the present invention.
In up process, from the signal of cellphone subscriber, after antenna element U10 receives in simulation extension unit, after upstream radio-frequency signal is processed amplification by the 3rd RF processing unit U9, it is transferred to the second analog photoelectricity converting unit U8；Second analog photoelectricity converting unit U8 converts upstream radio-frequency signal to analog optical signal, is transferred to numeral by analog optical fiber and expands unit.The first analog photoelectricity converting unit U6 that numeral is expanded in unit receives the analog optical fiber signal from extension unit, is converted into radiofrequency signal, then passes through the second RF processing unit U5 and upstream radio-frequency signal is converted to up intermediate-freuqncy signal；Up intermediate-freuqncy signal is transformed to baseband signal by the second digital processing element U4, is then converted into after optical signal through digital optical fiber transmission to Digital Access unit.The first digital processing element U2 is entered after being converted to digital signal by the optical signal of numeral expansion unit entrance access unit；First digital processing element U2 isolates baseband signal, and baseband signal is converted to up intermediate-freuqncy signal after digital processing；Up intermediate-freuqncy signal frequency conversion is upstream radio-frequency signal by RF processing unit U1, and adopts the mode of radio transmission to pass information source back.
2) Digital Access unit is not co-located realizes principle:
As shown in Figure 3, for the not co-located construction of 2G, 3G and 4G base station BTS, but the area of coverage meets multi-service when collectively covering again, the realization that this system support is not co-located, the simulation extension unit that the Digital Access unit of two be concurrently accessed or more than two connects respectively is satisfied by the requirement that multi-service covers.
Multiple Digital Access unit when net, according to clock synchronization issue, will arrange main Digital Access unit and from Digital Access unit simultaneously, and main Digital Access unit only has one end, can have multiterminal from Digital Access unit.Main Digital Access unit and multiple can be selected for an optical communication interface each other from Digital Access unit and connected by optical fiber.
Two digital access units are such as set, including a main Digital Access unit and one from Digital Access unit.When two digital access unit all normal operation, main website from station clock automatic synchronization, signal normally covers.When digital main access unit fault, the communication of two digital access units is cut off, master-salve station clock step-out.This moment from Digital Access unit by using the clock of oneself as clock reference, can ensure that from Digital Access unit itself and the simulation extension unit business dragged properly functioning, having the coverage effect of network signal, the simulation extension unit that this time, main Digital Access unit was with will be not covered with effect.Due to main Digital Access unit fault, therefore from the simulation extension unit of Digital Access unit just only a kind of covering business, this business is the access service from Digital Access unit.On the other hand, the monitoring system of main Digital Access unit lost efficacy, and owing to all of pilot signal is all report a Surveillance center by main Digital Access unit, result in the monitoring of whole numerical model analysis networking full light compartment system paralysis.When, after main Digital Access unit power down or fault, in the phase powered by reserve battery, warning information can be reported Surveillance center by main Digital Access unit, it is provided that the foundation of Network fault.Multiple situations from Digital Access unit are also similar.
If principal and subordinate's Digital Access unit lockstep failure; principal and subordinate's Digital Access unit can intelligence based on respective clock; main Digital Access unit makees clock with main Digital Access unit; from Digital Access unit to make clock from Digital Access unit; they are each independently irrelevant disturbs, and multi-service numerical model analysis networking distributed system is physically divided into two or more single operation system realize zooming out covering.
3) Digital Access unit 1+1 hot backup realizes principle
As shown in Figure 2, the radiofrequency signal into multiple business is terminated from information source RRU or microcell base station, after a switch unit, then being respectively connected to two digital access units, switch unit supports the reception of the transmission of multi-service signal, the switching of light path, pilot signal.nullUnder normal circumstances，Two digital access units all receive the radiofrequency signal of multiple business from switch unit，The light path of two digital access units all links together with switch unit，And all normal operation，Numeral is expanded the optical interface of unit and is connected with switch unit by optical fiber，Under the state of this physical connection，Only Digital Access unit in one end expands unit communication transmitting business signal and pilot signal with numeral，When a railway digital access unit therein occurs that power fail warning or light send out fault，Switch unit is by the pilot signal of out of order Digital Access unit feedback，Realize the switching of light mouth，Now，The Digital Access unit of tape jam connects disconnection with the light mouth of switch unit，Another railway digital access unit is expanded unit at synchronization with numeral and is realized the connection of light path，Transmission digital baseband signal expands unit to numeral，Realize the hot-swap backup functionality of Digital Access unit.This procedures system can all be automatically performed, solve the worry needing engineering staff to safeguard on the spot because numeral access unit equipment fault, laser failure or power failure bring, be practically applicable to some remote websites and portfolio very much not allows the website that breaks down.Simultaneously because the digital distribution formula system one number of units word access unit of multi service access can support the business of at least 128 simulation extension units, in order to ensure that substantial amounts of simulation extension unit is unlikely to traffic failure occur at synchronization, this function fully solves this engineering practice and uses problem.
For the sake of ease of implementation, it is provided that Digital Access unit in embodiment, numeral are expanded the circuit structure of unit, simulation extension unit and switch unit that the present invention is realized function declaration is as follows:
1, Digital Access unit
Such as Fig. 4, Digital Access unit 1 includes the first RF processing unit U1, the first digital processing element U2, the first power supply unit U3.Its annexation is: the first RF processing unit U1 and the first digital processing element U2 connects to form uplink downlink；First power supply unit U3 connects other unit respectively, and namely RF processing unit U1, digital processing element U2 provide energy.
Its operation principle is:
In downlink, after 2G/3G/4G wireless signal enters Digital Access unit, by RF processing unit U1, downlink radio-frequency signal is converted to descending intermediate-freuqncy signal, descending intermediate-freuqncy signal is transformed to baseband signal by digital processing element U2 after treatment, is transferred to numeral and expands unit after being then converted into optical signal.
In like manner, in up-link, numeral expand the optical signal that unit transmission comes, be converted to digital signal.First digital processing element U2 isolates baseband signal, and baseband signal is converted to up intermediate-freuqncy signal after digital processing.Up intermediate-freuqncy signal frequency conversion is upstream radio-frequency signal by the first RF processing unit U1, and adopts the mode of radio transmission to pass base station back.First power supply unit U3 obtains external energy, and provides energy to respectively RF processing unit U1 and digital processing element U2.
2, numeral expands unit
Such as Fig. 5, numeral is opened up unit 2 and is included the second digital processing element U4, the second RF processing unit U5, the first analog photoelectricity converting unit U6 and the second power supply unit U7；Its annexation is: the second digital processing element U4, the second RF processing unit U5 and the first analog photoelectricity converting unit U6 are sequentially connected with composition uplink downlink；First power supply unit U7 powers respectively to the second digital processing element U4, the second RF processing unit U5 and the first analog photoelectricity converting unit U6.
Its operation principle is:
In descending process, numeral expands unit reception optical signal and converted baseband digital signal sends into the second digital processing element U4, isolate base band data, descending intermediate-freuqncy signal frequency conversion is downlink radio-frequency signal by the second RF processing unit U5, convert downstream signal to analog optical signal through the first analog photoelectricity converting unit U6, be transferred to simulation extension unit 3 through analog optical fiber；
In up process, the first analog photoelectricity converting unit U6 that numeral is expanded in unit receives the analog optical fiber signal from extension unit, is converted into radiofrequency signal, then passes through the second RF processing unit U5 and upstream radio-frequency signal is converted to up intermediate-freuqncy signal；Up intermediate-freuqncy signal is transformed to baseband signal by the second digital processing element U4, is then converted into after optical signal through digital optical fiber transmission to Digital Access unit.Second power supply unit U7 obtains external energy, and provides energy to the second digital processing element U4, the second RF processing unit U5 and the first analog photoelectricity converting unit U6.
3, simulation extension unit
Such as Fig. 6, simulation extension unit 3 includes the second analog photoelectricity converting unit U8, the 3rd RF processing unit U9, antenna element U10, CPU control unit U11 and the three power supply unit U12；Its annexation is:
Second analog photoelectricity converting unit U8, the 3rd RF processing unit U9, antenna element U10 connect to form uplink downlink；Second analog photoelectricity converting unit U8 is carried out the control of luminous power converted magnitude by CPU control unit U11；3rd RF processing unit U9 is carried out the control of radio frequency input-output power size by CPU control unit U11；
3rd power supply unit U12 powers respectively to the second analog photoelectricity converting unit U8, the 3rd RF processing unit U9, antenna element U10, CPU control unit U11.
Its operation principle is:
In descending process, the analog optical signal expanding unit from numeral is converted to radio frequency downstream signal by the second analog photoelectricity converting unit U8, being then transferred to the 3rd RF processing unit U9, the signal after the 3rd RF processing unit U9 process is amplified is transferred to antenna element U10 and is radiated in space.In up process, from the signal of cellphone subscriber, after antenna element U10 receives in simulation extension unit, after upstream radio-frequency signal is processed amplification by the 3rd RF processing unit U9, it is transferred to the second analog photoelectricity converting unit U8；Second analog photoelectricity converting unit U8 converts upstream radio-frequency signal to analog optical signal, is transferred to numeral by analog optical fiber and expands unit.
3rd power supply unit U12 obtains external energy, and provides energy to respectively the second analog photoelectricity converting unit U8, the 3rd RF processing unit U9, antenna element U10, CPU control unit U11.
4, switch unit
Such as Fig. 7, switch unit 4 includes the 4th RF processing unit U13, optical path unit U14, the 4th power supply unit U15 and monitoring control unit U16.
Its annexation is: monitoring control unit U16 connects optical path unit U14, and the 4th power supply unit U15 connects other unit respectively, and namely optical path unit U14 and monitoring control unit U15 provides energy.
Its operation principle is:
The 2G/3G/4G radiofrequency signal of the 4th RF processing unit U13 mean allocation access arrangement, the radiofrequency signal after dividing equally is connected with two digital access units respectively by interface, is designated as Digital Access unit 1, Digital Access unit 2 in figure.Optical path unit U14 expands unit be connected with two digital access unit and a numeral respectively.Under normal circumstances, optical path unit U14 realizes information forwarding between Digital Access unit 1 and numeral expansion unit.After monitoring control unit U16 receives the warning information of Digital Access unit 1, control optical path unit U14 and carry out signal switching, it is achieved Digital Access unit 2 and numeral are expanded the information between unit 2 and forwarded.
4th power supply unit U15 obtains external energy, and provides energy to respectively optical path unit U14 and monitoring control unit U16.
Specific embodiment described herein is only to present invention spirit explanation for example.Described specific embodiment can be made various amendment or supplements or adopt similar mode to substitute by those skilled in the art, but without departing from the spirit of the present invention or surmount the scope that appended claims is defined.
Claims (10)
1. the full light distributed system of the numerical model analysis networking of a multi service access; it is characterized in that: include Digital Access unit, numeral expands unit, simulation extension unit; Digital Access unit and digital unit of expanding are provided with signal forwarding connection, and the signal distribution port of numeral expansion unit is provided with simulates extension unit connection；Described Digital Access unit includes connecting to form first RF processing unit (U1) of uplink downlink, the first digital processing element (U2)；Described numeral is expanded unit and is included connecting to form second digital processing element (U4) of uplink downlink, the second RF processing unit (U5), the first analog photoelectricity converting unit (U6)；Described simulation extension unit includes connecting to form the second analog photoelectricity converting unit (U8) of uplink downlink, the 3rd RF processing unit (U9), antenna element (U10)；
In downlink, first RF processing unit (U1) of described Digital Access unit realizes being converted to downlink radio-frequency signal descending intermediate-freuqncy signal, first digital processing element (U2) realizes descending IF signal processing is transformed to baseband signal, is then converted into optical signal transmission and expands unit to numeral；Numeral is expanded second digital processing element (U4) of unit and the optical signal transmitted by Digital Access unit is converted to digital signal, isolate baseband signal and be converted to descending intermediate-freuqncy signal, descending intermediate-freuqncy signal frequency conversion is downlink radio-frequency signal by the second RF processing unit (U5), converts radiofrequency signal to analog optical signal by the first analog photoelectricity converting unit (U6) and is transferred to simulation extension unit；The analog optical signal expanding unit from numeral is converted to radio frequency downstream signal and is transferred to RF processing unit (U9) and carries out processing and amplify signal by the second analog photoelectricity converting unit (U8) of described simulation extension unit, then transmits to antenna element (U10)；
In up-link, the antenna element (U10) of described simulation extension unit realizes receiving wireless signal, processed after amplifying this upstream radio-frequency signal by the 3rd RF processing unit (U9), being transferred to the second analog photoelectricity converting unit (U8), upstream radio-frequency signal is converted to analog optical signal and is transferred to numeral expansion unit by the second analog photoelectricity converting unit (U8)；Described numeral is expanded the first analog photoelectricity converting unit (U6) of unit and is received the analog optical fiber signal from extension unit, it is converted into radiofrequency signal, then passing through the second RF processing unit (U5) and upstream radio-frequency signal is converted to up intermediate-freuqncy signal, up intermediate-freuqncy signal is transformed to after baseband signal is converted to optical signal and is transferred to Digital Access unit by the second digital processing element (U4)；First digital processing element (U2) realization of described Digital Access unit is converted to up intermediate-freuqncy signal after isolating baseband signal, up intermediate-freuqncy signal frequency conversion is upstream radio-frequency signal by the first RF processing unit (U1), and adopts the mode of radio transmission to pass information source back.
2. the full light distributed system of the numerical model analysis networking of a kind of multi service access according to claim 1, it is characterised in that: described simulation extension unit farther includes the CPU control unit (U11) that the second analog photoelectricity converting unit (U8), the 3rd RF processing unit (U9) are controlled.
3. the full light distributed system of the numerical model analysis networking of a kind of multi service access according to claim 2, it is characterised in that: described Digital Access unit farther includes the first power supply unit (U3) powered respectively to the first RF processing unit (U1) and the first digital processing element (U2)；Described numeral expands the second power supply unit (U7) that unit farther includes to power respectively to the second digital processing element (U4), the second RF processing unit (U5) and the first analog photoelectricity converting unit (U6)；Described simulation extension unit farther includes the 3rd power supply unit (U12) powered respectively to the second analog photoelectricity converting unit (U8), the 3rd RF processing unit (U9), antenna element (U10), CPU control unit (U11).
4. the full light distributed system of numerical model analysis networking of a kind of multi service access according to claim 1 or 2 or 3, it is characterised in that: farther include Digital Access unit and numeral is expanded and is provided with switch unit between unit.
5. the full light distributed system of the numerical model analysis networking of a kind of multi service access according to claim 4, it is characterized in that: described switch unit adopts radio-frequency cable and optical fiber to connect two digital access units respectively, described switch unit includes the 4th RF processing unit (U13), optical path unit (U14), 4th power supply unit (U15), monitoring control unit (U16), 4th RF processing unit (U13) mean allocation enters the radiofrequency signal of switch unit, radiofrequency signal after dividing equally connects two digital access units respectively, monitoring control unit (U16) connects optical path unit (U14), optical path unit (U14) connects numeral and expands unit；Optical path unit (U14) can switch connection between Digital Access unit, it is achieved selects Digital Access unit and numeral to expand the signal between unit and forwards；4th power supply unit (U15) is powered respectively to optical path unit (U14), monitoring control unit (U16).
6. the full light distributed system of numerical model analysis networking of a kind of multi service access according to claim 1 or 2 or 3; it is characterized in that: described Digital Access unit and numeral are expanded unit and connected by digital fiber, numeral expands unit and simulation extension unit is connected by analog optical fiber.
7. the full light distributed system of the numerical model analysis networking of a kind of multi service access according to claim 6, it is characterised in that: between described Digital Access unit and numeral expansion unit, the frame format based on CPRI standard agreement carries out framing transmission.
8. the full light distributed system of numerical model analysis networking of a kind of multi service access according to claim 1 or 2 or 3, it is characterised in that: described Digital Access unit is set to two or more, is not co-located setting between Digital Access unit.
9. the full light distributed system of numerical model analysis networking of a kind of multi service access according to claim 1 or 2 or 3, it is characterised in that: the antenna element (U10) of described simulation extension unit adopts the miniature single polarization multifrequency antenna sheltered.
10. by the full light distributed system of numerical model analysis networking of a kind of multi service access described in claim 1 or 2 or 3, it is characterised in that: described numeral expands unit and simulation extension unit is provided with ONU fiber optic network and realizes star-like network construction form.
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