CN103391485A - Digital all-optical distributed system allowing multiple-service access - Google Patents
Digital all-optical distributed system allowing multiple-service access Download PDFInfo
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Abstract
A digital all-optical distributed system allowing multiple-service access is characterized by comprising an access unit, an expansion unit and a remote unit, wherein the access unit and the expansion unit are connected through optical fiber, and the expansion unit and the remote unit are connected through optical fiber; the access unit or the expansion unit is connected with the network, and the remote unit is connected with the network; and a switching unit can be further arranged and is connected with the access unit which is used for 1+1 backup through a feeder line cable and optical fiber. The access unit in the system couples multiple service radio-frequency signals from a signal source, converts the signals into digital baseband signals and transmits the digital baseband signals to the expansion unit, the expansion unit realizes shunting of digital baseband downlink signals and combining of digital baseband uplink signals and transmits the digital baseband signals to the remote unit through optical fiber. The system can provide services such as wireless access, fixed network broadband, WLAN (wireless local area network) signal transmission and the like, can develop multiple functions on the basis of digital intermediate frequency and can support star, daisy chain and mixed networking.
Description
Technical field
The present invention relates to a kind of indoor and outdoors digital fiber multi-service distributed system, this system is mainly used in villages within the city, large stadium, office building, many nets, and station and the multi-service signal depth of netting under the special screne such as different station cover and networking more altogether.
Background technology
The advantage such as variation was not widely used in recent years digital optical-fiber remote system with optical path loss with its networking flexibility, system gain, had contained the multiple Operation Networks such as 2G, 3G.because radio communication is being carried out fast development, from first generation simulation mobile communication to 2G, the commercialization of 3G and LTE(Long Term Evolution, Long Term Evolution) before and after beforehand research, course also only has the time of more than ten years, all there is the simultaneous situation of multiple communication network in operator in networking, the communication network that most of operator is runing generally has two or more, domestic mobile communication producer such as China Mobile, GSM900 is just arranged, DCS1800, TD-SCDMA2000, WLAN and fixed network broadband, China's joint communication has GSM900, DCS1800, WCDMA2100, WLAN and fixed network broadband, multiple network is also deposited with regard to meaning after digital RF far-drawing system can be taked the network of multiple types or frequency range is merged and is carried out Optical Fiber Transmission, can reduce like this overlapping investment and the property of networking coordinates.
But because building has serious decay and shielding action to wireless signal, at some large-scale be a lot of blind area of indoor venue, office building, underground garage and villages within the city, existence then the cellphone subscriber can't use.Simultaneously, along with the growth of mobile service, due to 2G and 3G business downstream rate lower, be difficult to meet the experience perceptibility of present intelligent terminal user to the data business.
Aspect installation and networking, traditional digital fiber system is all to adopt to build the feeder network realization, by passive mixer spare, multiple-frequency signal being fused to the antenna feeder end realizes covering, the radiation problem of antenna has caused people's fear, causes operator complained and remove in a lot of networking systems of residential quarter and office building.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of full light distributed system of numeral of multi service access, when for the user, providing 2G, 3G, the access service of 4G wireless signal, provides the services such as local area network (LAN) WLAN, fixed network broadband.
Technical scheme of the present invention is the full light distributed system of a kind of numeral of multi service access, comprises access unit, expands unit and extension unit,
Access unit be connected unit and connect by optical fiber, expand unit and connect by optical fiber with extension unit; Access unit or expansion unit interconnection network, the extension unit interconnection network;
Described access unit comprises RF processing unit U1, digital processing element U2, power supply unit U3, and converter unit U1 and digital processing element U2 connect to form uplink downlink, and power supply unit U3 powers respectively to RF processing unit U1 and digital processing element U2;
Described expansion unit comprises digital processing element U4, power supply unit U5, and digital processing element U4 independently forms uplink downlink, and power supply unit U5 powers to digital processing element U4;
Described extension unit comprises digital processing element U6, RF processing unit U7, ethernet signal processing unit U8, antenna element U9 and power supply unit U10, digital processing element U6, RF processing unit U7 and antenna element U9 connect to form uplink downlink successively, ethernet signal processing unit U8 is connected respectively with digital processing element U6, RF processing unit U7, and power supply unit U10 powers respectively to digital processing element U6, RF processing unit U7 and ethernet signal processing unit U8.
And described network is local area network (LAN) WLAN or fixed network broadband.
And, during the access unit interconnection network,
In down link, after the 2G that information source sends or 3G or 4G wireless signal enter access unit, by RF processing unit U1, downlink radio-frequency signal is converted to descending intermediate-freuqncy signal; Digital processing element U2 processes descending intermediate-freuqncy signal to be transformed to baseband signal, and with the ethernet signal of input framing again, be transferred to the expansion unit after then being converted to light signal;
In up link, enter digital processing element U2 after being converted to digital signal by the light signal of expanding unit and enter access unit; Digital processing element U2 isolates baseband signal and ethernet signal, wherein ethernet signal output, and baseband signal is converted to up intermediate-freuqncy signal after digital processing; RF processing unit U1 is up radiofrequency signal with up intermediate-freuqncy signal frequency conversion, and adopts the mode of radio transmission to pass information source back.
During the expanding element interconnection network,
In down link, after converting descending digital signal to, the light signal that access unit is input to expanding element enters digital processing element U4; Digital processing element U4 closes road and framing again with the downstream broadband signal of descending digital signal and input, is sent to extension unit from each port after being converted to light signal;
In up link, after converting digital uplink signal to, the light signal that extension unit outputs to expanding element enters digital processing element U4; Digital processing element U4 is decomposed into up broadband signal and up-link wireless digital signal with the digital uplink signal of each port input, wherein up broadband signal output, the up-link wireless digital signal is closed behind road framing again, is sent to access unit after then being converted to light signal;
While transmitting between expanding element and extension unit, as follows in the extension unit transmission means,
In down link, by expanding after the light signal that transmits unit is converted to digital signal, enter digital processing element U6; Digital processing element U6 isolates baseband signal and ethernet signal, wherein ethernet signal is transferred to ethernet signal processing unit U8, baseband signal is converted to descending intermediate-freuqncy signal after digital processing, RF processing unit U7 is downlink radio-frequency signal with descending intermediate-freuqncy signal frequency conversion, and by antenna element U9, is radiated in space;
In up link, wireless signal is converted to up intermediate-freuqncy signal by RF processing unit U7 with up radiofrequency signal after entering extension unit by antenna element U9 reception; Digital processing element U6 is transformed to baseband signal with up intermediate-freuqncy signal, and with the ethernet signal of ethernet signal processing unit U8 transmission framing again, be transferred to the expansion unit after then being converted to light signal.
And the ethernet signal processing unit U8 provide direct current.
And, carry out the framing transmission based on the frame format of CPRI standard agreement between access unit and expansion unit, expansion unit and extension unit.
And, set up the networking of star-like, chain, annular or mixing by expanding unit and extension unit.
And access unit, expansion unit and extension unit adopt the category-5 cable interconnection network.
And, two or more access units are set, access unit is not total to location.
And, switch unit and two access units are set, adopt radio frequency cable to be connected with optical fiber between access unit and switch unit, adopt optical fiber to connect between switch unit and expansion unit,
Described switch unit comprises RF processing unit U11, optical path unit U12, power supply unit U13 and monitoring control unit U14, the radiofrequency signal that RF processing unit U11 mean allocation enters switch unit, radiofrequency signal after dividing equally is connected with two access units respectively, monitoring control unit U14 connects optical path unit U12, optical path unit U12 connects one of access unit and expanding element, and switching connects another access unit according to monitoring control unit U14 signal; Power supply unit U13 powers respectively to RF processing unit U11, optical path unit U12 and monitoring control unit U14.
And antenna element U9 adopts the miniature single polarization multifrequency antenna of sheltering.
All adopt optical fiber to connect between the full light distributed system unit of the numeral of technical scheme multi service access of the present invention, overcome category-5 cable transmission only have 100m apart from inferior position, can utilize ONU (optical node) premises network resource to zoom out covering, simultaneously, system is supported up-to-date LTE network, it is a lifting greatly in data service, the transmission means of the access output of multiple business, meet the requirement of operator's many nets Joint construction and sharing, and the upper access unit that adopts of design is not total to the design of location access, networking is more flexible, and multiplexing not co-siting base stations reaches with the effect that covers.Particularly, have following effect:
1) support the multiple services novel compartment systems such as 2G, 3G, LTE, WLAN, fixed network broadband, be used for the wireless communication signals degree of depth coverings such as 2G/3G/LTE/WLAN/ fixed network.
2) access unit is supported Hot Spare, solves the whole distributed system paralysis problem that causes because of the access unit fault.
3) multiservice system, solved many nets coexistence problems, is conducive to operator's Joint construction and sharing.
4) multiservice system, solved base station and be not total to location, and the requirement that the area of coverage needs again multi-service to cover, can not need to move base station.
5) input of WLAN, fixed network broadband services is all supported in access unit and expansion unit, and access way is various.
6) extension unit integrated micro single polarization multifrequency antenna, do not need separately to build the antenna feeder network system.
7) power supply meets the POE interface protocol to extension unit to WLAN_AP, has solved WLAN_AP power supply worry.
8) multiservice system, solved the demand of any networking mode, and access unit is supported star-like networking, expands unit and support star-like networking and chain cascade network, and extension unit is supported the chain cascade network.
Description of drawings
Fig. 1 is the full light distributed system main body chain graph of multi-service numeral of the embodiment of the present invention.
Fig. 2 is the access unit 1+1 hot backup application schematic diagram of the embodiment of the present invention.
Fig. 3 is that the full light distributed system access unit of multi-service numeral of the embodiment of the present invention is not total to the application schematic diagram of location.
Fig. 4 is that framework map is realized in the access unit inside of the embodiment of the present invention.
Fig. 5 is that framework map is realized in the inside, expansion unit of the embodiment of the present invention.
Fig. 6 is that framework map is realized in the extension unit inside of the embodiment of the present invention.
Fig. 7 is that framework map is realized in the switch unit inside of the embodiment of the present invention.
Embodiment
Describe technical solution of the present invention in detail below in conjunction with drawings and Examples.
The full light distributed system of the numeral of a kind of multi service access that embodiment provides, comprise access unit (AU), expand unit (EU) and extension unit (RU), and switch unit (SU) also is set when the needs Hot Spare.
As shown in Figure 1, in the main body link, access unit be connected unit and connect by optical fiber, expand unit and connect by optical fiber with extension unit, generally adopt the single mode bidirectional optical fiber to connect; As shown in Figure 2, adopt radio frequency cable to be connected with optical fiber between access unit and switch unit, adopt optical fiber to connect between switch unit and expansion unit.
Access unit, expand unit and be connected with extension unit and use separately optical fiber to connect, also can utilize existing ONU fiber optic network, realize the digital baseband signal transmission.
Described access unit has the multiservice functionalitys such as 2G, the 3G of support, 4G, fixed network broadband and WLAN, and 4G network LTE supports that 2 advance the 2 MIMO(multiple-input, multiple-output that go out simultaneously) technology.
Described access unit be connected unit and all can connect local area network (LAN) WLAN, the fixed network broadband, can be selected arbitrarily by those skilled in the art during concrete enforcement, be used for transmission wireless access business, LAN service and broadband services, simultaneously access unit and expand data-signal between unit and meet the CPRI(common public radio interface) the frame format transmission of standard agreement.
Described switch unit is needing access unit to support to use under the scene of 1+1 hot backup, the monitor message intelligent decision switching state that transmits by access unit.
The light that described expansion unit and extension unit can arrange light transmitting-receiving interface and be used for cascade is expanded interface (generally having 8), when meeting the degree of depth and covering, can realize the networking of star-like, chain, annular and mixing.Adopting optical fiber to be connected between extension unit and extension unit gets final product.
Described full light distributed system when meeting full light networking, is expanded unit and extension unit and is also supported the possibility of category-5 cable transmission.Be connected to thin WLAN_AC system by category-5 cable, thin WLAN_AC system is divided into AC and AP two parts form, and is designated as respectively in the drawings WLAN_AC, WLAN_AP.AC is wireless controller, serves as gateway function between WLAN (wireless local area network) and extranets, can or expand unit with access unit and be connected; AP is WAP (wireless access point), is the access point that the mobile computer user enters cable network, can be connected with extension unit.
described access unit be connected unit can be to the local area network (LAN) WLAN that connects, in the time of fixed network broadband transparent transmission, separately signal is supported function of exchange, access unit and expansion unit can be to the signals of a road Ethernet input, be transformed into multi-path digital optical fiber baseband signal by exchange and export to extension unit, the Ethernet service of extension unit on the same link also supported exchange route function, it is chain, star-like, annular and each RU unit of form networking connection such as be connected can access fixed network broadband and thin WLAN_AP system, and extension unit is supported thin WALN_AP business passback and power supply.
Described access unit can meet the function of 1+1 backup, and when a termination wherein enters cell failure and light transmitting-receiving when abnormal, another access unit is realized the backup switching by the mode of Hot Spare.
Described access unit can meet access unit and not supply the function of location, solves the different station of many nets and is not total to the problem of location, realizes that complicated multi-functional networking and the different station of large-scale networking are with the requirement that covers.
The single polarization multifrequency antenna that described extension unit RU integrated micro is sheltered realizes covering requirement.
Operation principle of the present invention:
1) access Principle of Signal Transmission
Be connected into local area network (LAN) WLAN or fixed network broadband take the expansion unit as example, describe:
in descending process, access unit is from the downlink radio-frequency signal of information source (RRU or microcell base station end etc.) access multiple business, become descending intermediate-freuqncy signal after RF processing unit U1, and descending intermediate-freuqncy signal is transformed to digital signal, after by digital processing element U2, it being packaged into the frame format of suitable standard interface protocol (as CPRI) requirement, the corresponding light signal is sent to the expansion unit, be converted to descending digital signal after expanding unit (EU) receiving optical signals, downstream broadband signal in digital processing element U4 and ONU or AC output closes road, the digital signal of closing behind road is packaged into the frame format that suitable standard interface protocol (as CPRI) requires, and by merit, divide and output to a plurality of light mouths (for example 8), Jiang Ge road corresponding light signal is sent to extension unit.The extension unit receiving optical signals is also changed baseband digital signal and is sent into digital processing element U6, isolate base band data, RF processing unit U7 is downlink radio-frequency signal with descending intermediate-freuqncy signal frequency conversion, and the antenna element U9 that carries through equipment is emitted to overlay area, reaches the purpose that signal covers.Extension unit can provide the access of wireless signal, the function of fixed network broadband and WLAN.During concrete enforcement, the concrete module in each unit can adopt the existing chip of prior art to realize.Laser transmission, light signal/digital signal conversion, analog/digital conversion etc. is all prior art, adopts respective digital fiber optical transceiver, A/D converter etc. to get final product, it will not go into details in the present invention.
In up process, signal from the cellphone subscriber, after being received by antenna element U9 in extension unit, be transformed to up intermediate-freuqncy signal through RF processing unit U7, close road by baseband signal processing unit with up intermediate-freuqncy signal corresponding digital signal with the up broadband signal by router or AC output, the digital signal of closing behind road is carried out framing again with certain frame format, after being packaged into again the frame format of suitable standard interface protocol (as CPRI) requirement, the corresponding light signal is sent to the expansion unit.Expand unit and realize opto-electronic conversion, digital processing element U4 is separated into up wideband baseband signal and radio base band signal with the corresponding digital uplink signal of light signal that each port receives, up wideband baseband signal is transferred to ONU and AC by interface, each port up-link wireless baseband signal is by after closing road, and the corresponding light signal is sent to access unit.The corresponding baseband digital signal of the light signal that access unit will receive is sent into digital processing element U2, and it is reverted to base band data, after RF processing unit U1, sends back mobile communication base station.
2) ethernet signal transmission principle
, take access unit access to LAN WLAN or fixed network broadband as example, describe:
the digital processing element U2 that the local area network signal that is entered by external interface WLAN_AC or fixed network wide-band exchange unit and the baseband signal after the fixed network broadband signal digital enter access unit simultaneously, digital processing element U2 according to predetermined protocol to two kinds of signals framing again, be transferred to the expansion unit by the digital light mouth with optical fiber, expand unit and support the exchange processing capacity of above-mentioned service signal, by digital processing element U4, descending digital signal is outputed to 8 light mouths, by Optical Fiber Transmission to extension unit, extension unit is separated frame by digital processing element U6 and is processed, LAN service and the fixed network broadband services that to separate by ethernet signal processing unit U8 are transferred to WLAN_AP and broadband MODEM.Up process correspondingly.
3) access unit is not total to location and realizes principle:
As shown in Figure 3, for 2G, 3G and the not location construction altogether of 4G base station BTS, but the area of coverage meets in the common situation about covering of multi-service again, this system support is the realization of location altogether not, and the extension unit that the access unit more than two or two that accesses simultaneously connects respectively all meets the requirement that multi-service covers.
A plurality of access units are simultaneously in the situation that net,, according to clock synchronization issue, main access unit are set and from access unit, main access unit only has an end, from access unit, multiterminal can be arranged.Main access unit can select an optical communication interface to connect by optical fiber with being connected from access unit each other.
Two access units for example are set, comprise that a main access unit and one are from access unit.When two access units all worked, from main website on the station clock automatic synchronization, signal normally covered.When main access unit fault, the communication of two access units is cut off, master-salve station clock step-out.To use oneself clock as clock reference from access unit this moment, can guarantee that reaching the extension unit business of dragging from access unit itself normally moves, the coverage effect that network signal is arranged, this time master's access unit with extension unit will there is no coverage effect.Due to main access unit fault, therefore from the extension unit of access unit, just only have a kind of covering business, this business is the access service from access unit.On the other hand, the supervisory control system of main access unit lost efficacy, and, because all pilot signals are all to report a Surveillance center by main access unit, had caused the monitoring paralysis of whole distributed system.After main access unit power down or fault, main access unit can report Surveillance center with warning information within the reserve battery power supply phase, and the foundation of Network fault is provided.A plurality of situations from access unit are also similar.
If principal and subordinate's access unit clock synchronous fault, principal and subordinate's access unit can intelligence take separately clock as main, main access unit is made clock with main access unit, from access unit from access unit, to make clock, they are independent irrelevant disturbing separately, physically the multi-service distributed system is divided into two or more single operation systems and realizes zooming out covering.
4) the access unit 1+1 hot backup is realized principle
As shown in Figure 2, enter the radiofrequency signal of multiple business from information source RRU or microcell base station termination, after a switch unit, then access respectively two access units, switch unit is supported the transmission of multi-service signal, the switching of light path, the reception of pilot signal.under normal circumstances, two access units all receive the radiofrequency signal of multiple business from switch unit, the light path of two access units all links together with switch unit, and all work, expanding the optical interface of unit follows switch unit to connect by optical fiber, under the state of this physical connection, only have a termination to enter unit with expanding unit communication transmitting business signal and pilot signal, when wherein a road access unit occurs that power fail warning or light are sent out fault, switch unit is by the pilot signal of out of order access unit feedback, realize the switching of light mouth, at this moment, the access unit of tape jam connects disconnection with the light mouth of switch unit, another road access unit is realized the connection of light path with the expansion unit at synchronization, the transmission of digital baseband signal is given and is expanded unit, realize the hot-swap backup functionality of access unit.This procedures system can all be completed automatically, has solved the worry that needs the engineering staff to safeguard of bringing because of access unit equipment fault, laser failure or power failure on the spot, is practically applicable to some remote websites and traffic carrying capacity and very much not allows the website that breaks down.Can support simultaneously the business of at least 128 extension units due to access unit of digital distribution formula system of multi service access, in order to guarantee that a large amount of extension units is unlikely to traffic failure to occur at synchronization, this function has fully solved this engineering practice and has used problem.
5) extension unit is transferred to the WLAN_AP power supply and is total to the principle that realizes of business
Extension unit is with access unit or expand the interface that WLAN business that unit transmits carries by equipment, adopt four pairs of twisted-pair feeder modes of category-5 cable or CAT5E UTP cable to be transferred to the WLAN_AP unit, and by the netting twine of registering one's residence (category-5 cable or CAT5E UTP cable) of laying, for the user, provide the hundred mega broadband access service.When transmission 100 m ethernet data, only need to use 1 and 2,3 and 6 two pair of twisted-pair feeder, the power supply twisted-pair feeder is 4 and 5,7 and 8 two pairs of twisted-pair feeders provide, 4 and 5 links form anodal, 7 and 8 links form negative level, are offered the PD module (Power Device, receiving end equipment) of WLAN_AP by extension unit.The local power taking of WLAN_AP or the worry of POE power supply have independently been solved.
For the sake of ease of implementation, provide the circuit structure of access unit in embodiment, expansion unit, extension unit and switch unit to be described as follows:
1, access unit
As Fig. 4, access unit comprises RF processing unit U1, digital processing element U2, power supply unit U3.
Its annexation is:
Converter unit U1 and digital processing element U2 connect to form uplink downlink;
Power supply unit U3 connects respectively other unit (converter unit U1, digital processing element U2), and energy is provided.
Its operation principle is:
In down link, after the 2G/3G/4G wireless signal enters access unit, by RF processing unit U1, downlink radio-frequency signal is converted to descending intermediate-freuqncy signal, digital processing element U2 is transformed to baseband signal after treatment with descending intermediate-freuqncy signal, and the ethernet signal that enters with WLAN_AC or ONU transmission framing again, be transferred to the expansion unit after then being converted to light signal.WLAN_AC transmission ethernet signal is wireless mode, and ONU transmission ethernet signal is wired mode.
In like manner, in up link, the light signal by expanding the unit transmission, be converted to digital signal.Digital processing element U2 isolates baseband signal and ethernet signal, and wherein ethernet signal is transferred to WLAN_AC or ONU, and baseband signal is converted to up intermediate-freuqncy signal after digital processing.RF processing unit U1 is up radiofrequency signal with up intermediate-freuqncy signal frequency conversion, and adopts the mode of radio transmission to pass base station back.
Power supply unit U3 obtains external energy, and energy is provided for respectively converter unit U1 and digital processing element U2.
Operation principle while more than being the access unit interconnection network, if access unit not access to LAN WLAN or fixed network broadband, ethernet signal is by expanding cell processing, different from the above course of work is that digital processing element U2 only processes baseband signal:
In down link, after the 2G/3G/4G wireless signal that information source sends enters access unit, by RF processing unit U1, downlink radio-frequency signal is converted to descending intermediate-freuqncy signal; Digital processing element U2 processes descending intermediate-freuqncy signal to be transformed to baseband signal, is transferred to the expansion unit after again being converted to light signal after framing;
In up link, enter digital processing element U2 after being converted to digital signal by the light signal of expanding unit and enter access unit; Digital processing element U2 extracts the baseband signal that obtains and be converted to up intermediate-freuqncy signal after digital processing; RF processing unit U1 is up radiofrequency signal with up intermediate-freuqncy signal frequency conversion, and adopts the mode of radio transmission to pass information source back.
2, expand unit
, as Fig. 5, expand unit and comprise digital processing element U4, power supply unit U5.
Its annexation is:
Digital processing element U4 independently forms uplink downlink;
Power supply unit U5 connects digital processing element U4, and energy is provided.
Its operation principle is:
In down link, the light signal of access unit transmission, enter digital processing element U4 after converting descending digital signal to.Digital processing element U4 closes road with the downstream broadband signal of descending digital signal and ONU or AC output, the digital signal of closing behind road is carried out framing again with certain frame format, and after being packaged into the frame format of suitable standard interface protocol (as CPRI) requirement, and be transferred to respectively each output interface, then by digital fiber transceiver, digital fiber, the corresponding light signal is sent to extension unit.
In like manner, in up link, extension unit is converted to digital uplink signal by the light signal that digital fiber transmits, and is transferred to digital processing element U4.Digital processing element U4 is decomposed into up broadband signal and up-link wireless digital signal with the digital uplink signal of each port transmission, wherein up broadband signal enters OUN or AC by each interface transmission, after the up-link wireless digital signal is closed road, after being packaged into the frame format of suitable standard interface protocol (as CPRI) requirement, then by digital fiber transceiver, digital fiber, the corresponding light signal is sent to access unit.
Power supply unit U5 obtains external energy, and energy is provided for digital processing element U4.
Operation principle during more than for expansion unit interconnection network, if expand unit not access to LAN WLAN or fixed network broadband, ethernet signal is processed by access unit, and different from the above course of work is that digital processing element U4 only need transmit descending digital signal or digital uplink signal:
In down link, after converting descending digital signal to, the light signal that access unit is input to expanding element enters digital processing element U4; Digital processing element U4 is descending digital signal framing again, is sent to extension unit from each port after being converted to light signal;
In up link, after converting digital uplink signal to, the light signal that extension unit outputs to expanding element enters digital processing element U4; Digital processing element U4 closes behind road framing again with the digital uplink signal of each port input, is sent to access unit after then being converted to light signal.
3, extension unit
As Fig. 6, extension unit comprises digital processing element U6, RF processing unit U7, ethernet signal processing unit U8, antenna element U9 and power supply unit U10.Antenna element U9 can adopt the miniature single polarization multifrequency antenna of sheltering.
Its annexation is:
Digital processing element U6, RF processing unit U7 and antenna element U9 connect to form uplink downlink successively, and ethernet signal processing unit U8 is connected respectively with digital processing element U6, RF processing unit U7;
Power supply unit U10 connects respectively other unit (digital processing element U6, RF processing unit U7 and ethernet signal processing unit U8), and energy is provided.
Its operation principle is:
In down link, the light signal by expanding the unit transmission, be converted to digital signal.Digital processing element U6 isolates baseband signal and ethernet signal, and wherein ethernet signal is transferred to ethernet signal processing unit U8, and baseband signal is converted to descending intermediate-freuqncy signal after digital processing.RF processing unit U7 is downlink radio-frequency signal with descending intermediate-freuqncy signal frequency conversion, and by antenna element U9, is radiated in space.
In like manner, in up link, after wireless signal enters extension unit by antenna element U9 reception, by RF processing unit U7, up radiofrequency signal is converted to up intermediate-freuqncy signal, the up intermediate-freuqncy signal of digital processing element U6 conversion is baseband signal, and with the ethernet signal of ethernet signal processing unit U8 transmission framing again, be transferred to the expansion unit after then being converted to light signal.
Ethernet processing unit U8 can provide the functions such as broadband access network, wireless routing, direct current supply by Ethernet or WLAN (wireless local area network) (WLAN_AP).
Power supply unit U10 obtains external energy, and provides energy to digital processing element U6, RF processing unit U7, ethernet signal processing unit U8 respectively.
4, switch unit
As Fig. 7, switch unit comprises RF processing unit U11, optical path unit U12, power supply unit U13 and monitoring control unit U14.
Its annexation is:
Monitoring control unit U14 connects optical path unit U12,
Power supply unit U13 connects respectively other unit (optical path unit U12 and monitoring control unit U14), and energy is provided.
Its operation principle is:
The 2G/3G/4G radiofrequency signal of RF processing unit U11 mean allocation access arrangement, the radiofrequency signal after dividing equally is connected with two access units respectively by interface, is designated as access unit 1, access unit 2 in figure.
Optical path unit U12 respectively with two access units with is connected an expanding element and is connected.Under normal circumstances, optical path unit U12 realizes that between access unit 1 and expanding element, information forwards.After monitoring control unit U14 receives the warning information of access unit 1, control optical path unit U12 and carry out the signal switching, realize that the information between access unit 2 and expanding element forwards.
Power supply unit U13 obtains external energy, and energy is provided for respectively optical path unit U12 and monitoring control unit U14.
Each unit specific implementation can adopt the existing circuit devcie of prior art.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Claims (10)
1. the full light distributed system of numeral of a multi service access is characterized in that: comprises access unit, expands unit and extension unit,
Access unit be connected unit and connect by optical fiber, expand unit and connect by optical fiber with extension unit; Access unit or expansion unit interconnection network, the extension unit interconnection network;
Described access unit comprises RF processing unit U1, digital processing element U2, power supply unit U3, and converter unit U1 and digital processing element U2 connect to form uplink downlink, and power supply unit U3 powers respectively to RF processing unit U1 and digital processing element U2;
Described expansion unit comprises digital processing element U4, power supply unit U5, and digital processing element U4 independently forms uplink downlink, and power supply unit U5 powers to digital processing element U4;
Described extension unit comprises digital processing element U6, RF processing unit U7, ethernet signal processing unit U8, antenna element U9 and power supply unit U10, digital processing element U6, RF processing unit U7 and antenna element U9 connect to form uplink downlink successively, ethernet signal processing unit U8 is connected respectively with digital processing element U6, RF processing unit U7, and power supply unit U10 powers respectively to digital processing element U6, RF processing unit U7 and ethernet signal processing unit U8.
2. by the full light distributed system of numeral of a kind of multi service access claimed in claim 1, it is characterized in that: described network is local area network (LAN) WLAN or fixed network broadband.
3., by the full light distributed system of numeral of a kind of multi service access claimed in claim 2, it is characterized in that:
During the access unit interconnection network,
In down link, after the 2G that information source sends or 3G or 4G wireless signal enter access unit, by RF processing unit U1, downlink radio-frequency signal is converted to descending intermediate-freuqncy signal; Digital processing element U2 processes descending intermediate-freuqncy signal to be transformed to baseband signal, and with the ethernet signal of input framing again, be transferred to the expansion unit after then being converted to light signal;
In up link, enter digital processing element U2 after being converted to digital signal by the light signal of expanding unit and enter access unit; Digital processing element U2 isolates baseband signal and ethernet signal, wherein ethernet signal output, and baseband signal is converted to up intermediate-freuqncy signal after digital processing; RF processing unit U1 is up radiofrequency signal with up intermediate-freuqncy signal frequency conversion, and adopts the mode of radio transmission to pass information source back;
During the expanding element interconnection network,
In down link, after converting descending digital signal to, the light signal that access unit is input to expanding element enters digital processing element U4; Digital processing element U4 closes road and framing again with the downstream broadband signal of descending digital signal and input, is sent to extension unit from each port after being converted to light signal;
In up link, after converting digital uplink signal to, the light signal that extension unit outputs to expanding element enters digital processing element U4; Digital processing element U4 is decomposed into up broadband signal and up-link wireless digital signal with the digital uplink signal of each port input, wherein up broadband signal output, the up-link wireless digital signal is closed behind road framing again, is sent to access unit after then being converted to light signal;
While transmitting between expanding element and extension unit, as follows in the extension unit transmission means,
In down link, by expanding after the light signal that transmits unit is converted to digital signal, enter digital processing element U6; Digital processing element U6 isolates baseband signal and ethernet signal, wherein ethernet signal is transferred to ethernet signal processing unit U8, baseband signal is converted to descending intermediate-freuqncy signal after digital processing, RF processing unit U7 is downlink radio-frequency signal with descending intermediate-freuqncy signal frequency conversion, and by antenna element U9, is radiated in space;
In up link, wireless signal is converted to up intermediate-freuqncy signal by RF processing unit U7 with up radiofrequency signal after entering extension unit by antenna element U9 reception; Digital processing element U6 is transformed to baseband signal with up intermediate-freuqncy signal, and with the ethernet signal of ethernet signal processing unit U8 transmission framing again, be transferred to the expansion unit after then being converted to light signal.
4. by the full light distributed system of numeral of a kind of multi service access claimed in claim 3, it is characterized in that: the ethernet signal processing unit U8 provide direct current.
5., by the full light distributed system of numeral of a kind of multi service access claimed in claim 3, it is characterized in that: carry out the framing transmission based on the frame format of CPRI standard agreement between access unit and expansion unit, expansion unit and extension unit.
6., by the full light distributed system of numeral of claim 1 or 2 or 3 or 4 or 5 described a kind of multi service access, it is characterized in that: the networking of setting up star-like, chain, annular or mixing by expanding unit and extension unit.
7. by the full light distributed system of numeral of claim 1 or 2 or 3 or 4 or 5 described a kind of multi service access, it is characterized in that: access unit, expansion unit and extension unit adopt the category-5 cable interconnection network.
8., by the full light distributed system of numeral of claim 1 or 2 or 3 or 4 or 5 described a kind of multi service access, it is characterized in that: two or more access units are set, and access unit is not total to location.
9. press the full light distributed system of numeral of claim 1 or 2 or 3 or 4 or 5 described a kind of multi service access, it is characterized in that: switch unit and two access units are set, adopt radio frequency cable to be connected with optical fiber between access unit and switch unit, adopt optical fiber to connect between switch unit and expansion unit
Described switch unit comprises RF processing unit U11, optical path unit U12, power supply unit U13 and monitoring control unit U14, the radiofrequency signal that RF processing unit U11 mean allocation enters switch unit, radiofrequency signal after dividing equally is connected with two access units respectively, monitoring control unit U14 connects optical path unit U12, optical path unit U12 connects one of access unit and expanding element, and switching connects another access unit according to monitoring control unit U14 signal; Power supply unit U13 powers respectively to RF processing unit U11, optical path unit U12 and monitoring control unit U14.
10. by the full light distributed system of numeral of claim 1 or 2 or 3 or 4 or 5 described a kind of multi service access, it is characterized in that: antenna element U9 adopts the miniature single polarization multifrequency antenna of sheltering.
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