CN105577282B

CN105577282B - In the distributed radio frequency based on optical fiber（RF）Digital data service is provided in communication system

Info

Publication number: CN105577282B
Application number: CN201610029179.2A
Authority: CN
Inventors: 威廉·P·丘恩; 迈克尔·索尔; 沃尔夫冈·G·施韦克
Original assignee: Corning Optical Communications LLC
Current assignee: Corning Research and Development Corp
Priority date: 2010-05-02
Filing date: 2011-05-02
Publication date: 2018-09-18
Anticipated expiration: 2031-05-02
Also published as: CN102918924A; EP2567592A1; CN105577282A; WO2011139942A1; CN102918924B

Abstract

Distributed communication system disclosed herein based on optical fiber, the system both provide and support RF communication services and digital data service.RF communication services and digital data service can be by fiber distributions to client terminal device, for example, remote antenna unit.In some embodiments, digital data service can pass through the fiber distribution that separates of optical fiber with distribution RF communication services.In other embodiments, digital data service can be distributed by common optical fiber together with RF communication services.For example, digital data service with different frequency by common optical fiber with RF communication service together with can be distributed with different wave length and/or via wavelength-division multiplex (WDM) via frequency division multiplexing (FDM).It distributes and can also be used for providing power supply to digital data service component for providing the power supply of power supply to remote antenna unit in the distributed communication system based on optical fiber.

Description

In the distributed radio frequency based on optical fiber（RF）Digital data service is provided in communication system

Related application

Present application asks entitled " Providing Digital Data Services in filed in 2 days Mays in 2010 Optical Fiber-based Distributed Radio Frequency(RF)Communications Systems,and The U.S. provisional patent application cases the 61/330,386th of Related Components and Methods ", in October, 2010 US application case filed in U.S. provisional patent application cases filed in 14 days the 61/393,177th and September in 2010 28 days 12/892, No. 424 priority, it is described to be incorporated by reference herein in its entirety herein.

Present application is related to " Power Distribution in Optical entitled filed in 2 days Mays in 2010 Fiber-based Distributed Communications Systems Providing Digital Data and Radio Frequency(RF)Communications Services,and Related Components and The U.S. provisional patent application cases of Methods " the 61/330th, 385, it is described to be incorporated by reference herein in its entirety this Wen Zhong.

Present application further relates to " Optical Fiber-based Distributed entitled filed in 2 days Mays in 2010 The U.S. Provisional Patent Application of Communications Systems, and Related Components and Methods " Case the 61/330th, 383, it is described to be incorporated by reference herein in its entirety herein.

Technical field

The technology of disclosure case is related to for the distributed communication based on optical fiber by fiber distribution radio frequency (RF) signal System.

Background technology

With increasing need is communicated to high-speed mobile data, wireless communication rapidly develops.For example, so-called " nothing Line fidelity " or " WiFi " system and WLAN (WLAN) are just being configured in many different types of regions (for example, coffee Shop, airport, library etc.) in.Distributed communication system and the wireless device for being known as " client ", the wireless device must It must be located in wireless range or " cell coverage area ", to be communicated with access point apparatus.

It is a kind of configuration distributed communication system method comprise the steps of：Using radio frequency (RF) antenna coverage areas, Referred to as " antenna coverage areas ".For example, antenna coverage areas can have range in the radius from several meters to up to 20 meters.Combination Several access point apparatus form antenna coverage areas array.Because each antenna coverage areas covers small range, usually every One antenna coverage areas only has several users (client).Such case allows to minimize the RF bands shared between wireless system users Wide quantity.Antenna coverage areas may be needed to provide in building or other facilities with the client into building or facility End provides distributed communication system access.However, it may be desirable to distribute signal of communication using optical fiber.The benefit of optical fiber includes increasing The bandwidth added.

The distributed communication system (being known as " optical fiber radio " or " RoF ") that one kind is used to form antenna coverage areas utilizes The RF signals sent by optical fiber.The system may include that headend station, the headend station are optically coupled to multiple remote antennas Unit, each remote antenna unit provide antenna coverage areas.Remote antenna unit can include respectively RF transceivers, described RF transceivers are couple to antenna to be wirelessly transferred RF signals, and wherein remote antenna unit is couple to headend station via optical fiber link. RF signals can pass through the RF transceivers in remote antenna unit.Remote antenna unit will be from via light to electricity (O/E) converter The incoming optical RF signal of Optical fiber downlinks is converted to electrical RF signal, and the electrical RF signal is then transferred to RF transmitting-receivings Device.Electrical RF signal is converted to electromagnetic signal by RF transceivers via antenna, and the antenna is couple to offer in remote antenna list RF transceivers in member.Antenna also receives electromagnetic signal (that is, electromagnetic radiation) from the client in antenna coverage areas and by institute It states electromagnetic signal and is converted to electrical RF signal (that is, electrical RF signal in electric wire).Remote antenna unit is then via electricity to light (E/O) electrical RF signal is converted to optical RF signal by converter.Optical RF signal is then sent to by fiber optic uplink Headend station.

Invention content

Embodiment disclosed in specific implementation mode includes the distributed communication system based on optical fiber, and the system provides And support two kinds of radio frequency (RF) communication service and digital data service.RF communication services and digital data service can pass through optical fiber point It is fitted on client terminal device, for example, remote antenna unit.Digital data service can be by separating with the optical fiber of distribution RF communication services Fiber distribution.Alternatively, digital data service can be distributed by common optical fiber together with RF communication services.For example, digital Data service can pass through common via wavelength-division multiplex (WDM) with different wave length and/or via frequency division multiplexing (FDM) with different frequency Optical fiber distributes together with RF communication services.Distribution is used in the distributed communication system based on optical fiber to remote antenna unit The power supply for providing power supply can also be used for providing power supply to digital data service component.

In one embodiment, provide it is a kind of for by RF communication services and digital data service (DDS) be assigned to The distributing antenna system of a few remote antenna unit (RAU).Distributing antenna system includes front end unit (HEU).HEU is passed through It is arranged to receive the electrical RF signals of communication of at least one downlink.HEU is also arranged at least one downlink is electrical RF signals of communication are converted at least one downlink optical RF signals of communication, at least one downlink optical RF communications Signal by least one communication downlink to be transmitted at least one RAU.HEU is also arranged to through at least one communication Uplink receives at least one optical uplink RF signals of communication from least one RAU.HEU is also arranged at least one A optical uplink RF signals of communication are converted to the electrical RF signals of communication of at least one uplink.Distributing antenna system is also Including DDS controllers.DDS controllers are arranged to receive at least one downlink optical number containing at least one DDS Signal, and by least one second communication downlink at least one downlink optical number is provided at least one RAU Signal.

In another embodiment, a kind of at least one be assigned to RF communications and DDS in distributing antenna system is provided The method of a RAU.It the described method comprises the following steps：At least one electrical RF signals of communication of downlink are received at HEU.Institute It is further comprising the steps of to state method：The electrical RF signals of communication of at least one downlink are converted at least one downlink light RF signals of communication are learned, at least one downlink optical RF signals of communication by least one communication downlink to transmit To at least one RAU.The method is further comprising the steps of：By at least one communication uplink from least one at HEU A RAU receives at least one optical uplink RF signals of communication.The method is further comprising the steps of：By at least one uplink Link optics RF signals of communication are converted to the electrical RF signals of communication of at least one uplink.The method further includes following step Suddenly：At least one downlink optical digital signal containing at least one DDS is received at DDS controllers, and by least One the second communication downlink provides at least one downlink optical digital signal at least one RAU.

In another embodiment, a kind of RAU in distributing antenna system is provided.The RAU includes light to electricity (O-E) converter, the downlink optical RF signals of communication that the O-E converters are arranged to receive are converted to downlink chain The electrical RF signals of communication in road, and provide at least one first port for the electrical RF signals of communication of downlink.The RAU further includes Electricity to light (E-O) converter, the E-O converters is arranged to the uplink electrical that will be received from least one first port Gas RF signals of communication are converted to optical uplink RF signals of communication.The RAU further includes DDS interface, the DDS interface coupling It is connected at least one second port.DDS interface is arranged to downlink optical digital signal being converted to downlink electrical Digital signal is to provide at least one second port, and the uplink electrical destiny that will be received from least one second port Word signal is converted to optical uplink digital signal.

Additional feature structure and advantage will be illustrated in subsequent specific implementation mode, and for the technology of fields For personnel, additional feature structure and advantage part will be apparent from the description or by putting into practice reality described herein Mode (including subsequent specific implementation mode, claims and attached drawing) is applied to recognize.

It should be understood that general description and following detailed description both of which propose embodiment and are intended to provide to be used for above Understand general introduction or the frame of the property and characteristic of disclosure case.It is further understood including attached drawing with providing, and attached drawing is incorporated to this theory In bright book and form part of this specification.Schema illustrates various embodiments, and disclosed to explain together with the description The principle of concept and operation.

Description of the drawings

Fig. 1 is the schematic diagram of the exemplary distributed communication system based on optical fiber；

Fig. 2 is the more detailed schematic diagram of exemplary headend unit (HEU) and remote antenna unit (RAU), the HEU and institute RAU is stated to be configurable in the distributed communication system based on optical fiber of Fig. 1；

Fig. 3 is the partial sectional schematic view of exemplary building infrastructure, the distributed communication based on optical fiber in Fig. 1 System can be used in the building infrastructure；

Fig. 4 is the schematic diagram of illustrative embodiments, the embodiment by with radio frequency (RF) communication service is provided The separated downlink optical fiber of optical fiber and uplink optical fiber provide digital data service to the distributed communication based on optical fiber RAU in system；

Fig. 5 is the exemplary headend medium converter (HMC) of the distributed communication system based on optical fiber for Fig. 4 Figure, the system contain digital media converter (DMC), and the DMC is arranged to electrical digital signal being converted to optics number Word signal, vice versa；

Fig. 6 is the figure for the exemplary DMC in the HMC of Fig. 5；

Fig. 7 is the schematic diagram of exemplary building infrastructure, in the building infrastructure, digital data service It is provided in the distributed communication system based on optical fiber with RF communication services；

Fig. 8 is the schematic diagram of exemplary RAU, and the RAU can be used for providing exemplary digital data service and RF communication clothes In the distributed communication system based on optical fiber of business；

Fig. 9 is the schematic diagram of another exemplary embodiment, and the embodiment with RF communication services by separating down Uplink optical fiber and uplink optical fiber the RAU into the distributed communication system based on optical fiber provide digital data service；

Figure 10 A are the schematic diagram of illustrative embodiments, and the embodiment is in the distributed communication system based on optical fiber In digital data service is multiplexed using wavelength-division multiplex (WDM) with different wave length by downlink optical fiber and uplink optical fiber With RF communication services；

Figure 10 B are the schematic diagram of illustrative embodiments, and the embodiment is each letter using WDM by common optical fiber Road is multiplexed uplink communication and downlink communication；

Figure 11 is the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication system based on optical fiber Made in the HEU and HMC of co-located with different wave length by common downlink optical fiber and common uplink optical fiber in system With WDM with multiplexing digital data service and RF communication services；

Figure 12 is the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication system based on optical fiber It is used in common shell HEU and MC with different wave length by common downlink optical fiber and common uplink optical fiber in system WDM is with multiplexing digital data service and RF communication services；

Figure 13 is the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication system based on optical fiber It is taken come multiplexing digital data using frequency division multiplexing (FDM) with different frequency by downlink optical fiber and uplink optical fiber in system Business and RF communication services；And

Figure 14 is the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication system based on optical fiber In system by downlink optical fiber and uplink optical fiber with different frequency and different wave length using FDM and WDM come digital multiplexing Data service and RF communication services.

Specific implementation mode

With detailed reference to embodiment, the example of the embodiment is illustrated in the drawings, and is illustrated in the drawing Partly (and not all) embodiment.Certainly, concept can present and should not be construed as limiting herein in many different forms 's；On the contrary, thesing embodiments are provided so that disclosure case will meet applicable legal requirement.As long as possible, similar elements accord with It number will be indicating same components or part.

Embodiment disclosed in specific implementation mode includes the distributed communication system based on optical fiber, and the system provides And support two kinds of radio frequency (RF) communication service and digital data service.RF communication services and digital data service can pass through optical fiber point It is fitted on client terminal device, for example, remote antenna unit.For example, the non-limiting example of digital data service include Ethernet, WLAN, global intercommunication microwave access (WiMax), Wireless Fidelity (WiFi), digital subscriber line (DSL) and long term evolution (LTE) Deng.Digital data service can pass through the fiber distribution that separates of optical fiber with distribution RF communication services.Alternatively, digital data service It can be distributed together with RF communication services by common optical fiber.For example, digital data service can via wavelength-division multiplex (WDM) with It different wave length and/or is distributed together with RF communication services by common optical fiber with different frequency via frequency division multiplexing (FDM).Distribution It can also be used for digital number in the distributed communication system based on optical fiber for providing the power supply of power supply to remote antenna unit Power supply is provided according to serviced component.

For this point, the exemplary distributed communication system based on optical fiber about Fig. 1 to Fig. 3, the system are described System provides RF communication services, and does not provide digital data service.Since Fig. 4 in the distributed communication system based on optical fiber It is additionally provided various embodiments of the digital data service together with RF communication services.

For this point, Fig. 1 is the schematic diagram of the embodiment of the distributed communication system based on optical fiber；In this implementation In mode, system is the distributed communication system 10 based on optical fiber, and the system 10 is set to form the covering of one or more antennas Region, the antenna coverage areas with the wireless client device in the radio frequency of antenna coverage areas (RF) range for building Vertical communication.Distributed communication system 10 based on optical fiber provides RF communication services (for example, cellular service).In this embodiment In, the distributed communication system 10 based on optical fiber includes front end unit (HEU) 12, one or more remote antenna units (RAU) 14 With optical fiber 16, HEU 12 is optically coupled to RAU 14 by the optical fiber 16.HEU 12 is arranged to electrical by downlink RF signals 18D is received from one or more information sources (for example, network or carrier wave) and is communicated, and provides the communication to RAU 14.HEU 12 are also arranged to from the communication that RAU 14 is received back to one or more to believe via the electrical RF signals 18U of uplink Source.For this point, in this embodiment, optical fiber 16 includes the signal transmitted from HEU 12 is carried to RAU 14 At least one downlink optical fiber 16D and the signal transmitted from RAU 14 to be carried back at least one uplink of HEU 12 Link fiber 16U.

Distributed communication system 10 based on optical fiber has antenna coverage areas 20, and the antenna coverage areas 20 can be substantially Ground is centered on RAU 14.The antenna coverage areas 20 of RAU 14 forms the overlay areas RF 21.HEU 12 is adapted for carrying out or promotees Into several optical fiber radios (RoF) application (for example, radio frequency (RF) identification (RFID), WLAN (WLAN) communication or honeycomb Telephone service) any one of application.Client terminal device 24 is shown in antenna coverage in the form of (for example) mobile device In domain 20, for example, the mobile device can be cellular phone.Client terminal device 24 can be that can receive any of RF signals of communication Device.Client terminal device 24 includes antenna 26 (for example, wireless network card), and the antenna 26 is suitable for receiving and/or send electromagnetism RF signals.

It continues to refer to figure 1, for electrical RF signal is transmitted to RAU 14 by downlink optical fiber 16D, and then is transmitted to Client terminal device 24 in the antenna coverage areas 20 formed by RAU 14, HEU 12 include electric to light (E/O) converter 28.E/ Downlink electrical RF signal 18D is converted to the downlink optical RF letters transmitted by downlink optical fiber 16D by O converters 28 Number 22D.RAU 14 includes light to electric (O/E) converter 30, downlink optical of the O/E converters 30 will receive RF signals 22D converts back electrical RF signal, and the electrical RF signal by the antenna 32 of RAU 14 to be wirelessly communicated to be located at Client terminal device 24 in antenna coverage areas 20.

Similarly, antenna 32 is also arranged to logical from the reception wireless RF of client terminal device 24 in antenna coverage areas 20 Letter.For this point, antenna 32 receives wireless RF communication from client terminal device 24 and will indicate that the electrical RF of wireless RF communication believes The E/O converters 34 number being transmitted in RAU 14.Electrical RF signal is converted to optical uplink RF signals by E/O converters 34 22U, the optical uplink RF signals 22U by uplink optical fiber 16U to be transmitted.The O/E provided in HEU 12 turns Optical uplink RF signals 22U is converted to the electrical RF signals of uplink, the electrical RF signals of uplink by parallel operation 36 It then may act as the electrical RF signals 18U of uplink and send back network or other information sources.In this embodiment, HEU 12 is not It can identify the position of the client terminal device 24 in this embodiment.Client terminal device 24 can be in any day formed by RAU 14 In the range of line overlay area 20.

Fig. 2 is the more detailed schematic diagram of the exemplary distributed communication system based on optical fiber of Fig. 1, and the system is specific RF is serviced or application provides electrical RF service signals.In the exemplary embodiment, HEU 12 includes service unit 37, the clothes Being engaged in, unit 37 by network link 39, from one or more external networks 38 transmission (or adjusting and then transmission), electrically believe by RF services Number provide the signal.In certain exemplary embodiments, such case includes providing to press electrics and electronics engineering Shi Xue It is specified in 802.11 standard of meeting (IEEE) (that is, from 2.4 to 2.5 in gigahertz (GHz) and frequency range from 5.0 to 6.0GHz) WLAN signal distribution.Any other electrical RF signal frequency is possible.In another exemplary embodiment, service unit 37 provide electrical RF service signals by directly generating signal.In another exemplary embodiment, service unit 37 is coordinated The transmission of electrical RF service signals between client terminal device 24 in antenna coverage areas 20.

With continued reference to Fig. 2, service unit 37 is conductively coupled to E-O converters 28, and the E-O converters 28 are from service unit 37 It receives downlink electrical RF signal 18D and converts the signals to corresponding downlink optical RF signals 22D.In example Property embodiment in, E-O converters 28 include laser, and the laser is suitable for transmitting and answering for RoF described herein Enough dynamic ranges, also, the E-O converters 28 optionally include laser driver/amplifier, and the laser drives Dynamic device/amplifier is conductively coupled to laser.The example of laser suitable for E-O converters 28 includes but is not limited to laser two Pole pipe, distribution feedback (DFB) laser, Fabry-Perot (FP) laser and Vcsel (VCSEL).

With continued reference to Fig. 2, HEU 12 further includes O-E converters 36, and the O-E converters 36 are conductively coupled to service unit 37.O-E converters 36 receive optical uplink RF signals 22U and convert the signals to the electrical RF of corresponding uplink Signal 18U.In the exemplary embodiment, O-E converters 36 are photodetector or the photoelectricity for being conductively coupled to linear amplifier Detector.As shown in Figure 2, E-O converters 28 and O-E converters 36 constitute " converter to " 35.

According to illustrative embodiments, the service unit 37 in HEU 12 may include for distinguishing modulating/demodulating downlink chain The RF signal modulator/demodulator units 40 of road electrical RF signal 18D and the electrical RF signals 18U of uplink.Service unit 37 It may include that digital signal processing unit (" digital signal processor ") 42, the digital signal processor 42 are used for RF signal tune Device/demodulator unit 40 processed provides electric signal, and the electric signal is modulated in RF carrier wave with the electrical RF of downlink needed for generation Signal 18D.Digital signal processor 42 is also arranged to handle by demodulation uplink by RF signal modulator/demodulator units 40 The demodulated signal that link electrical RF signal 18U is provided.HEU 12 may also include by handle data and in addition execute logic and based on The optional central processing unit (CPU) 44 of operation is calculated, and for storing data (for example, passing through WLAN or other network transmissions Data) storage unit 46.

With continued reference to Fig. 2, RAU 14 further includes the converter pair 48 for including O-E converters 30 and E-O converters 34.O-E The downlink optical RF signals 22D received from HEU 12 is converted back downlink electrical RF signal 50D by converter 30.E- The electrical RF signals 50U of the uplink received from client terminal device 24 is converted to and is transmitted to the upper of HEU 12 by O converters 34 Line link optical RF signal 22U.O-E converters 30 and E-O converters 34 are via RF signal guides element 52 (for example, circulator) It is conductively coupled to antenna 32.As described below, RF signal guides element 52 is guiding downlink electrical RF signal 50D and uplink Road electrical RF signal 50U.According to illustrative embodiments, antenna 32 may include one or more paster antennas, such as in August, 2006 " Radio-over-Fiber Transponder With A Dual-Band Patch Antenna entitled filed in 16 days Entitled " Centralized filed in the U.S. Patent Application No. of System " 11/504,999 and 12 days June in 2006 Optical Fiber-Based Wireless Picocellular Systems and Methods " U.S. patent application cases Paster antenna disclosed in 11/451st, No. 553, above-mentioned two entirety are incorporated herein by reference.

With continued reference to Fig. 2, the distributed communication system 10 based on optical fiber further includes power supply unit 54, the power supply supply Device 54 generates electric power signal 56.The power supply unit 54 is conductively coupled to HEU 12 with for the power consumption member in the HEU 12 Part charges.In the exemplary embodiment, power line 58 through HEU 12 and extends to RAU 14 in converter pair 48 O-E converters 30 and E-O converters 34, optional RF signal guides element 52 (unless RF signal guides element 52 is passive device, For example, circulator) and provide any other power consumption element charging.In the exemplary embodiment, power line 58 includes Two electric wires 60 and 62, described two electric wires 60 and 62 carry single channel voltage and are conductively coupled to DC power supply converter at RAU 14 64.DC power supply converter 64 is conductively coupled to O-E converters 30 and E-O converters 34 in converter pair 48, also, DC electricity Source converter 64 by one or more voltage levels of electric power signal 56 become needed for the power consuming component in RAU 14 one or Multiple power levels.In the exemplary embodiment, DC power supply converter 64 is that DC/DC power supply changeover devices or AC/DC power supplys turn Parallel operation, depending on the type of the electric power signal 56 carried by power line 58.In another exemplary embodiment, power line 58 (dotted line) directly extends to RAU 14 from power supply unit 54 (rather than from HEU 12 or passing through HEU 12).In another exemplary In embodiment, power line 58 includes more than two electric wires and carrying multivoltage.

It can be carried how by the further exemplary schema of distributed communication system configuration indoors based on optical fiber to provide Fig. 3 is supplied.Fig. 3 is the partial sectional schematic view using the building infrastructure 70 of the distributed communication system based on optical fiber. System can be the distributed communication system 10 based on optical fiber of Fig. 1 and Fig. 2.Building infrastructure 70 typicallys represent any types Building, the distributed communication system 10 based on optical fiber is configurable in the building.As described in Fig. 1 and Fig. 2 above, example Such as, the distributed communication system 10 based on optical fiber is merged HEU 12 and is provided respectively with the overlay area into building infrastructure 70 The communication service of type.For example, described in more detail below, in this embodiment, the distribution based on optical fiber is logical Letter system 10 is arranged to receive RF wireless signals and RF signals is converted to the RoF for being transmitted to multiple RAU 14 by optical fiber 16 Signal.In this embodiment, the distributed communication system 10 based on optical fiber can be (for example) in building infrastructure 70 The interior indoor distributed antenna system (IDAS) that wireless service is provided.For example, these wireless signals may include cellular service, such as The wireless service of RFID tracking, the combination of Wireless Fidelity (WiFi), LAN (LAN), WLAN and above-mentioned items.

With continued reference to Fig. 3, in this embodiment, building infrastructure 70 includes first (ground) floor 72, the Two floors 74 and third floor 76.By HEU 12 in building infrastructure 70 antenna coverage is provided by main frame 78 Service floor 72,74,76 is carried out in domain 80.For simplicity, in Fig. 3 diagram floor 72,74,76 ceiling.Exemplary In embodiment, there are trunk cable 82 several different pieces, the different piece to promote a large amount of RAU 14 on building basis Arrangement in structure 70.Every RAU 14 services the overlay area of itself in antenna coverage areas 80 in turn.Trunk cable 82 It may include that (for example) riser cable 84, the riser cable 84 carry all downlink optical fiber 16D and uplink optical fiber 16U It is sent to HEU 12 and carries all optical fiber from the HEU 12.Riser cable 84 can be route by interconnecting unit (ICU) 85.ICU 85 can provide as a part for the power supply unit 54 in Fig. 2 or be separated with the power supply unit 54.ICU 85 can also be through Setting with provided in array cable 87 via (as shown in Figure 2 and as described above) and with downlink optical fiber 16D and uplink The power line 58 that link fiber 16U is assigned to RAU 14 together provides power supply to RAU 14.Trunk cable 82 may include one or more A more cables (MC) connector, the downlink optical fiber 16D and uplink optical fiber 16U that the MC connectors are suitable for select It is connected to several fiber optic cables 86 together with power line.

Trunk cable 82 enables multiple fiber optic cables 86 to distribute throughout building infrastructure 70 (for example, fixed to every The ceiling of one floor 72,74,76 or other support surfaces), to be carried for the first floor 72, the second floor 74 and third floor 76 For antenna coverage areas 80.In the exemplary embodiment, HEU12 is located in building infrastructure 70 (for example, between wardrobe Or control room), and in another exemplary embodiment, HEU 12 can be located at the building infrastructure 70 in remote location Outside.Base station transmitting-receiving station (BTS) 88 can be provided by second party (for example, cellular service provider), and the BTS 88 is connected to HEU 12 and can with 12 co-locateds of HEU or far from the HEU 12 position.BTS is any station or information source, the station or information source Input signal is provided to HEU 12 and receives return signal from HEU 12.In typical cellular system, for example, multiple BTS are configured To provide radio telephone covering at multiple remote locations.Every BTS is useful to corresponding cell, also, when movement station enters When cell, BTS is communicated with movement station.Every BTS may include that at least one wireless set, the wireless set are used for One or more subscriber units operated in cell associated are enable to communicate.

In Fig. 1 to Fig. 3 and the above-mentioned distributed communication system 10 based on optical fiber provides the point between HEU 12 and RAU14 Point to-point communication.Every RAU 14 is communicated by unique downlink and uplink optical fiber pair with HEU 12, to provide point pair Point communication.No matter when RAU 14 is mounted in the distributed communication system 10 based on optical fiber, RAU 14 is connected to unique Downlink and uplink optical fiber pair, the optical fiber is to being connected to HEU 12.Downlink optical fiber and uplink optical fiber can It provides in optical fiber 16.Multiple downlinks and uplink optical fiber are to may be provided in fiber optic cables with by commonly using fiber optic cables Service multiple RAU 14.For example, with reference to figure 3, the RAU 14 being mounted on given floor 72,74,76 can be by same optical fiber 16 services.For this point, optical fiber 16 can have multiple nodes, at the node, unique downlink and uplink Optical fiber is to may be connected to given RAU 14.

It may need to provide two kinds of digital data service and RF communication services for client terminal device.For example, Ke Nengxu In building infrastructure 70 numerical data clothes are provided to the client terminal device in the building infrastructure 70 Business and RF communication services.Non-wireless means and wireless device can be located in building infrastructure 70, non-wireless means and wireless Device is arranged to incoming digital data service.The example of digital data service include but is not limited to Ethernet, WLAN, WiMax, WiFi, DSL and LTE etc..Ethernet standard can support and (include but not limited to) 100 Gigabits per seconds (Mbs) (that is, quickly Ethernet) or kilomegabit (Gb) Ethernet or 10,000,000,000 (10G) Ethernets.The example of Digital Data Set including but not limited to has Line server and wireless server, wireless access point (WAP), gateway, desktop computer, hub, interchanger, remote radio Head end (RRH), Base Band Unit (BBU) and femtocell.Individual digital data service network can be provided, with to numerical data Device provides digital data service.

For this point, embodiment disclosed herein provides the distributed communication system based on optical fiber, the system Support two kinds of RF communication services and digital data service.RF communication services and digital data service can pass through fiber distribution to client End device, for example, remote antenna unit.Digital data service can be divided by the optical fiber separated with the optical fiber of distribution RF communication services Match.Alternatively, digital data service can be by commonly using optical fiber together with RF communication services in the distributed communication system based on optical fiber Middle distribution.For example, digital data service can be by commonly using optical fiber via wavelength-division multiplex (WDM) with different wave length and/or warp It is distributed together with RF communication services with different frequency by frequency division multiplexing (FDM).

Fig. 4 is the schematic diagram of illustrative embodiments, and the embodiment with radio frequency (RF) communication service by separating Downlink optical fiber and uplink optical fiber provide digital data service in the distributed communication system 90 based on optical fiber RAU.Distributed communication system 90 based on optical fiber includes some optical communication components, and the optical communication components are provided in Fig. 1 Into the distributed communication system 10 based on optical fiber of Fig. 3.These are illustrated in Fig. 4 with the common component symbol of Fig. 1 to Fig. 3 to commonly use Component.As shown in Figure 4, HEU 12 is provided.HEU 12 receives downlink electrical RF signal 18D from BTS 88.As described above, Downlink electrical RF signal 18D is converted to the downlink optical RF signals 22D for being assigned to RAU 14 by HEU 12.HEU 12 The optical uplink RF signals 22U for being also arranged to receive from RAU 14, which is converted to, to be provided to BTS 88 and provides to even The electrical RF signals 18U of uplink being connected on the network 93 of BTS 88.Terminal plate 92 can be provided to receive downlink optical fiber 16D and uplink optical fiber 16U, the downlink optical fiber 16D and uplink optical fiber 16U are arranged to carry downlink chain Road optical RF signal 22D and optical uplink RF signals 22U.As described above and Fig. 3 shown in, downlink optical fiber 16D and Uplink optical fiber 16U can be bundled in one or more riser cables 84 and can provide one or more ICU 85 together.

To provide digital data service in the distributed communication system 90 based on optical fiber in this embodiment, at this In a example, digital data service controller (also referred to as " the DDS controls in the form of front end medium converter (HMC) 94 are provided Device ").DDS controllers 94 can only include the medium converter for providing medium conversion facilities or may include promoting numerical data The additional functionality of service.DDS controllers device in order to control, the controller are arranged to through communication link, interface or other logical Believe that channel or circuit provide digital data service, the controller can be wired, wireless or two kinds combinations.Fig. 5 is illustrated The example of HMC94.HMC 94 includes shell 95, and the shell 95 is arranged to digital media converter (DMC) 97 to interface It is received into digital data service interchanger 96, to support and provide digital data service.For example, digital data service exchanges Machine 96 can be Ethernet switch.For example, digital data service interchanger 96 can be arranged to provide kilomegabit (Gb) Ethernet Digital data service.DMC 97 is arranged to electrical digital signal being converted to optical digital signal, and vice versa.DMC 97 can It is set to plug and play installation (that is, the installation in not required user setting and operability) and is used for HMC 94 In.Fig. 6 illustrative exemplaries DMC 97, the DMC 97 can be placed in the shell 95 of HMC 94.For example, DMC 97 can be wrapped Include Ethernet input connector or adapter (for example, RJ-45) and optical fiber output connector or adapter (for example, LC, SC, ST, MTP)。

With reference to figure 4, in this embodiment, HMC 94 is arranged to (via DMC 97) by coming from numerical data clothes Be engaged in interchanger 96 digital cable 99 by downlink electrical digital signal (or downlink electrical digital Data Service signal) 98D is converted to downlink optical digital signal (or downlink optical digital data service signal) 100D, the downlink chain Road optical digital signal 100D can be transmitted to RAU 14 by downlink optical fiber 102D.HMC 94 (via DMC 97) is also through setting It sets to receive optical uplink digital signal 100U from RAU 14 via uplink optical fiber 102U and by optical uplink Digital signal 100U is converted to the uplink electrical digital signal 98U for being transmitted to digital data service interchanger 96.In this way, can The digital data service for the part for being used as the distributed communication system 90 based on optical fiber, which is provided, by optical fiber removes RF communications to provide Digital data service except service.Client terminal device at RAU 94 can access these digital data services and/or RF Communication service, depending on the setting of the client terminal device.For example, the building infrastructure 70 of Fig. 7 pictorial images 3, but With the digital data service and digital client in addition to the RF communication services in the distributed communication system 90 based on optical fiber The illustrative example of device, the digital data service and digital client terminal device can provide client terminal device.Such as institute in Fig. 7 Show, exemplary digital data service includes WLAN 106, femtocell 108, gateway 110, Base Band Unit (BBU) 112, long-range Radio heads (RRH) 114 and server 116.

Referring back to Fig. 4, in this embodiment, downlink optical fiber 102D and uplink optical fiber 102U are provided In fiber optic cables 104, the fiber optic cables 104 are connect with 85 interfaces of ICU.ICU 85 provides common point, carries digit optical letter Number downlink optical fiber 102D and uplink optical fiber 102U can be with the downlink that carries RF optical signallings in the common point Link fiber 16U and uplink optical fiber 16D are bundled.One or more fiber optic cables 104 can be provided (herein also referred to as For array cable 104), the fiber optic cables 104 contain the downlink optical fiber 16D and uplink optical for being useful for RF communication services Fine 16U and downlink optical fiber 102D for digital data service and uplink optical fiber 102U, the optical line by and carry It is supplied to RAU 14.The combination of any service or the combination of any kind of optical fiber may be provided in array cable 104.Citing comes It says, array cable 104 may include single mode optical fiber and/or multimode fibre for RF communication services and/or digital data service.

Filed in 15 days Mays in 2009 and entitled " Power Distribution Devices, Systems, and The U.S. Patent Application No. of Methods For Radio-Over-Fiber (RoF) Distributed Communication " It is filed in No. 12/466,514 (full text of the case is incorporated herein by reference) and 2 days Mays in 2010 and entitled “Power Distribution in Optical Fiber-based Distributed Communication Systems Providing Digital Data and Radio-Frequency(RF)Communication Services,and ICU described in the U.S. provisional patent application cases the 61/330,385th of Related Components and Methods " Example, the ICU may be provided in the distributed communication system 90 based on optical fiber to distribute the downlink for RF communication services Optical fiber 16D and uplink optical fiber 16U and downlink optical fiber 102D and uplink optical fiber for digital data service The full text of 102U, both described application cases are incorporated herein by reference.

Access point (AP) 118 is may be connected to continued reference to Fig. 4, some RAU 14 or supports other dresses of digital data service It sets.AP 118 is illustrated, but AP 118 can be any other device for supporting digital data service.In the example of AP, AP 118 Access to the digital data service provided by digital data service interchanger 96 is provided.This is because downlink optical fiber 102D There is provided via array cable 104 and RAU 14 with uplink optical fiber 102U and arrive AP 118, the downlink optical fiber 102D and Uplink optical fiber 102U is carried from digital data service interchanger 96 by downlink electrical digital signal 98D and uplink Downlink optical digital signal 100D and optical uplink digital signal made of the 98U conversions of link electrical digital signal 100U.Numerical data client terminal device can access AP 118 to access the numerical data provided by digital data service interchanger 96 Service.

Digital data service client (for example, AP) needs electric power to operate and receive digital data service.Offer is provided Part of the digital data service as the distributed communication system based on optical fiber, is assigned to the distributed communication system based on optical fiber In the electric power of RAU can also be used to provide power supply for digital data service client.It is provided with for digital data service client Individual power supply is opposite, this can be to provide the convenient method of power supply to digital data service client.For example, by or It may further be used to by the power supply of the RAU 14 being assigned in Fig. 4 of ICU 85 to being based in the distributed communication system 90 of optical fiber RAU 14 at AP 118 provide power supply.For this point, ICU 85 can be arranged to provide electricity for RAU 14 and AP 118 Source.Power supply unit can be located in ICU 85, but may be alternatively located at the outside of ICU 85, also, the power supply unit can pass through Power line 120 provides, as shown in Figure 4.ICU 85 can receive exchange (AC) electricity or direct current (DC) electricity.ICU 85 can receive 110 The AC electricity or DC of volt (V) to 240V are electric.ICU 85 can be arranged to generate any desired voltage level and power level.Work( Rate level is born with the quantity of RAU 14 and the expection supported by any digital device of RAU 14 and the RAU 14 being connected in Fig. 4 Based on load.It may be further desirable to provide the additional power supply characteristics of management in ICU 85.For instance, it is possible to provide one or more Voltage protection circuit.

Fig. 8 is the schematic diagram of the exemplary internal components in the RAU 14 of Fig. 4, with further diagram under RF communications Uplink optical fiber 16D and uplink optical fiber 16D, downlink optical fiber 102D and uplink optical for digital data service How fine 102U and electric power provide RAU 14 and how can distribute in RAU 14.As shown in Figure 8, it is illustrated that array cable 104, the array cable 104, which contains, is useful for the downlink optical fiber 16D and uplink optical fiber 16D of RF communications, for number The downlink optical fiber 102D and uplink optical fiber 102U of data service and power line 58 from 85 carrying powers of ICU are (see also Fig. 2).As described in previously for Fig. 2, power line 58 may include that two electric wires 60,62, two electric wires 60,62 can be (example As) copper wire.

For the downlink optical fiber 16D and uplink optical fiber 16U of RF communications, for the downlink chain of digital data service Road optical fiber 102D and uplink optical fiber 102U and power line 58 enter the shell 124 of RAU 14.Also as shown in Figure 2 and above Described, downlink optical fiber 16D and uplink optical fiber 16U for RF communications are routed to O-E converters 30 respectively and E-O turns Parallel operation 34, and it is routed to antenna 32.The road downlink optical fiber 102D and uplink optical fiber 102U for digital data service By to the part as RAU 14 and the digital data service interface 126 that provides, to provide numerical data clothes via port 128 The access of business, the port 128 will be described in more detail below.58 carrying power supply of power line, the power supply are arranged to turn for O-E Parallel operation 30 and E-O converters 34 provide power supply and provide power supply for digital data service interface 126.For this point, power line 58 are couple to voltage controller 130, and the voltage controller 130 adjusts correct voltage and is O-E converters 30 and E-O converters 34 provide the correct voltage, and provide the correct electricity for other circuits in digital data service interface 126 and RAU 14 Pressure.

In this embodiment, be arranged to will be under on downlink optical fiber 102D for digital data service interface 126 Line link optical digital signal 100D is converted to downlink electrical digital signal 132D, the downlink electrical digital signal 132D can be accessed via port 128.Digital data service interface 126 is also arranged to the uplink that will be received by port 128 Link electrical digital signal 132U is converted to optical uplink digital signal 100U, the optical uplink digital signal 100U will provide back HMC 94 (see Fig. 4).For this point, medium converter 134 is provided in digital data service interface 126 In, to provide these conversions.Medium converter 134 contains O-E digital quantizers 136, will be on downlink optical fiber 102D Downlink optical digital signal 100D is converted to downlink electrical digital signal 132D.Medium converter 134 also contains E-O The uplink electrical digital signal 132U received by port 128 is converted to uplink optical by digital quantizer 138 HMC 94 will be provided back by learning digital signal 100U, the optical uplink digital signal 100U.For this point, electric power is come from The power supply of line 58 is provided to digital data service interface 126, to be carried to O-E digital quantizers 136 and E-O digital quantizers 138 Power supply source.

Since electric power is provided to RAU 14 and numerical data service interface 126, this is also via port 128 to being connected to The digital device of RAU 14 provides power supply and provides chance.For this point, as shown in Figure 8, power interface 140 also provides In digital data service interface 126.Power interface 140 is arranged to receive power supply from power line 58 via voltage controller 130, And the power interface 140 is also set so that power supply can be accessed by port 128.In this way, if client fills It sets containing compatible connector to be connected to port 128, then digital data service is not only can access, but also from power line 58 Power supply can also be accessed by identical port 128.Alternatively, power interface 140 can be couple to and the port for digital data service 28 separated ports.

For example, if providing digital data service by Ethernet, power interface 140 can be provided as Ethernet Power supply (PoE) interface.For example, port 128 can be arranged to receive the RJ-45 ethernet connector compatible with PoE.With this Mode, the ethernet connector being connected in port 128 will be by Ethernet digital data service access downlink optical fiber 102D and uplink optical fiber 102U to HMC94 simultaneously can be by the Ethernet digital data service from downlink optical fiber 102D It is linked into HMC 94 with uplink optical fiber 102U, and the ethernet connector can also be accessed by array cable 104 The power supply distributed by ICU 85, the array cable 104 are provided by power line 58.

Further, the communication supported by HEU 12 can be used to include the low order control to medium converter 134 for HEU 12 System and management.For example, medium converter 134 can by uplink optical fiber 16U by performance data (for example, be powered, receive Optical digital data etc.) it reports and carries communication service to HEU 12, the uplink optical fiber 16U.RAU 14 may include micro- place Device is managed, the microprocessor communicates with medium converter 134, to receive the data and by uplink optical fiber 16U by institute Data transmission is stated to HEU 12.

Other offer digital data services that are arranged in the distributed communication system based on optical fiber are possible.Citing comes It says, Fig. 9 is the schematic diagram of another exemplary embodiment, and the embodiment carries in the distributed communication system based on optical fiber For digital data service, the system is arranged to provide RF communication services.For this point, Fig. 9 provides point based on optical fiber Cloth communication system 150.Distributed communication system 150 based on optical fiber can be with the distributed communication system based on optical fiber in Fig. 4 It unites 90 similar, and may include providing the Common Component in the distributed communication system 90 based on optical fiber in Fig. 4.In this reality It applies in mode, HMC 94 and 12 co-locateds of HEU, rather than the offer that HMC 94 and HEU 12 is separated.For from numerical data The downlink optical fiber 102D and uplink optical fiber 102U that service switch 96 provides digital data service are also connected to wiring Plate 92.It is similar with Fig. 2, for the downlink optical fiber 16D and uplink optical fiber 16U of RF communications and for digital data service Downlink optical fiber 102D and optical uplink 102U be then routed to ICU 85.

For the downlink optical fiber 16D and uplink optical fiber 16U of RF communications and for the downlink of digital data service Link fiber 102D and optical uplink 102U may be provided in common fiber optic cables or provide in separated fiber optic cables. Further, as shown in Figure 9, independent media's converter (MC) 141 can be separately provided with RAU 14, instead of collecting with RAU 14 It is provided at ground, as shown in Figure 4.Independent MC 141 can be arranged to containing component, number of the component with offer in fig. 8 Component in database service interface 126 is identical, including medium converter 134.AP 118 can include also respectively antenna 152, with logical It crosses RAU 14 and wireless digital data service is provided, instead of the cable service that is provided by port 128 or except being provided by port 128 Cable service except.

Figure 10 A are the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication based on optical fiber Digital data service is provided in system.For this point, Figure 10 A provide the distributed communication system 160 based on optical fiber.Based on light Fine distributed communication system 160 can in the distributed communication system 90 and Fig. 9 based on optical fiber in Fig. 4 based on optical fiber Distributed communication system 150 is similar, and may include providing in the distributed communication system 90 and Fig. 9 based on optical fiber in Fig. 4 The distributed communication system 150 based on optical fiber in Common Component.

In this embodiment, as shown in FIG. 10A, wavelength-division multiplex (WDM) is passing through the distribution based on optical fiber Downlink optical fiber 162D (1-N) and uplink optical fiber 162U (1-N) in communication system 160 are multiplexed together with different wave length Digital data service and RF communication services." 1-N " downlink and uplink optical fiber arrive ICU 85 to providing, to be assigned to RAU 14 and independent MC 141.Multiplexing technique can be used to further decrease the cost of digital data service covering.By making With WDM, digital data signal transmits on optical fiber identical with RF signals of communication, but is transmitted with different wave length.Positioned at transmission position Set and receive the separated media conversion filter and WDM filters at position (for example, HMC 96 and RAU 14) can be used to Required wavelength reception signal.

HMC 94 and HEU 12 is co-located in the distributed communication system 160 based on optical fiber in Figure 10 A.It provides To 164 (N), each wavelength division multiplexer 164 (1) to 164 (N) is multiplexed normal at one or more multiple wavelength division multiplexers 164 (1) together With on downlink optical fiber 162D (1-N) for one or more downlink optical RF signals 22D of RF communications and for counting One or more downlink optical digital signals 100D of digital data service.Similarly, multiple Wave decomposing multiplexers 168 are provided (1) to 168 (N) (for example, filters), each Wave decomposing multiplexer 168 (1) to 168 (N) demultiplexes one or more uplinks Optical RF signal 22U and one or more optical uplink numbers from one or more common uplink optical fiber 162U (1-N) Word signal 100U provides optical uplink RF signals 22U to HEU 12 and by optical uplink digital signal 100U HMC 94 is provided.Wavelength-division demultiplexes (WDD) and WDM is also used in and demultiplexes common downlink optical fiber 162D in RAU 14 The downlink optical RF signals 22D and downlink optical digital signal 100D of multiplexing on (1-N), and be multiplexed common Optical uplink RF signals 22U on uplink optical fiber 162U (1-N) and optical uplink digital signal 100U.

Figure 10 B are the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication based on optical fiber Digital data service is provided in system 160'.The base in distributed communication system 160' and Figure 10 A based on optical fiber in Figure 10 B It is identical in the distributed communication system 160 of optical fiber, the difference is that, WDM is used for being multiplexed with different wave length by common optical fiber Uplink communication service and downlink communication service, the common optical fiber include downlink optical fiber 162D (1-N) and upper Two kinds of uplink optical fiber 162U (1-N).

Figure 11 is the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication system based on optical fiber Digital data service is provided in system.As shown in Figure 11, the distributed communication system 170 based on optical fiber, the system 170 are provided Digital data service can also be provided.Wavelength division multiplexer 172 is provided, it is one or more instead of being provided in wavelength-division multiplex together such as Figure 10 A One or more downlink optical RF signals 22D and use for RF communications on a common downlink optical fiber 162D (1-N) In one or more downlink optical digital signals 100D of digital data service.Wavelength division multiplexer 172 is by all downlinks Optical RF signal 22D and all downlink optical digital signal 100D are multiplexed into single downlink optical fiber 174D.Similarly, Wave decomposing multiplexer 176 is provided to press all optical uplink RF signals 22U of required wavelength (de) multiplexing and come from common uplink All optical uplink digital signal 100U of link fiber 174U.Wave decomposing multiplexer 175 and wavelength division multiplexer 177 also divide Not with the downlink optical RF signals of the wavelength-division multiplex with demultiplexing on common downlink optical 174D in ICU 85 The uplink optical of 22D and optical uplink digital signal 100U and wavelength-division multiplex on common uplink optical fiber 174U Learn RF signals 22U and optical uplink digital signal 100U.

It is answered alternatively, WDD and WDM are also used in RAU 14 with demultiplexing the wavelength-division on common downlink optical 174D Downlink optical RF signals 22D and downlink optical digital signal 100D, and wavelength-division multiplex is in common uplink Optical uplink RF signals 22U on optical fiber 174U and optical uplink digital signal 100U.In this alternate embodiments In, in the case where common WDM signal can be arranged with daisy chain and be assigned to 14 RAU from RAU 14, can be solved at RAU 14 Multiplexing.Alternatively, optical splitter can be used at the bursting point in fiber optic cables 104.

Figure 12 is the schematic diagram of another exemplary embodiment, and the embodiment is in the distributed communication system based on optical fiber Digital data service is provided in system.As shown in Figure 12, the distributed communication system 180 based on optical fiber, the system 180 are provided Digital data service can be also provided.The distribution based on optical fiber in distributed communication system 180 and Figure 11 based on optical fiber is logical Letter system 170 is identical, the difference is that, HEU 12 and HMC 94 are provided in common shell 182, and the shell 182 is also received Receive wavelength division multiplexer 172 and Wave decomposing multiplexer 176.Alternatively, same provided in Figure 10 A (164 (1-N) and 168 (1-N)) Multiple wavelength division multiplexers and multiple Wave decomposing multiplexers may be provided in common shell 182.

Figure 13 is the schematic diagram of the another exemplary embodiment of the distributed communication system based on optical fiber, the system Digital data service is provided.As shown in Figure 13, the distributed communication system 190 based on optical fiber is provided.In this embodiment In, frequency division multiplexing (FDM) is used for through downlink optical fiber and uplink optical fiber with different frequency multiplexing digital data service With RF communication services.It is using an advantage of FDM：E-O converters can be used for simultaneously by RF signals of communication and numerical data Signal is converted to respective optical signalling.Therefore, it can avoid the volume for electrical digital signal to be converted to optical digital signal Outer medium converter is to reduce complexity and cost-effective.For example, Fast Ethernet (for example, 100 megabit per seconds (Mbs)) Cellular frequency spectrum (for example, being less than 700MHz) transmission can be less than.More than one (1) letter can be transmitted in the frequency range simultaneously Road.

For this point, HEU 12 and 94 both of which of HEC are placed in common shell 182, as shown in Figure 13.It is multiple Frequency division multiplexer 192 (1-N) is provided in common shell 182, also, each frequency division multiplexer 192 (1-N) is arranged in light One or more downlinks electrical digital signal 98D is multiplexed with different frequency before learning conversion and one or more downlinks are electrical RF signals 18D.In this way, after optical transition, common Optical fiber downlinks 194D (1-N) can be carried in same downlink The downlink optical RF signals 22D and downlink optical digital signal of frequency division multiplexing on link fiber 194D (1-N) 102D.Similarly, multiple frequency division demultiplexers 196 (1-N) are provided in common shell 182 to demultiplex uplink optical fiber Optical uplink RF signals 22U on 194U (1-N) and optical uplink digital signal 100U.Frequency division demultiplexes (FDD) It is also used in RAU 14 with FDM.FDD is used in RAU 14, with from the optical signalling from common downlink optical fiber 174D Be converted to downlink electrical RF signal 18D and downlink electrical digital signal that electric signal demultiplexes frequency division multiplexing later 98D.FDM is also provided in RAU 14 to be converted to the optical uplink RF provided on common uplink optical fiber 174U The electrical signal of uplink before signal 22U and optical uplink digital signal 100U in frequency division multiplexing RAU 14.

Figure 14 is the schematic diagram of the another exemplary embodiment of the distributed communication system based on optical fiber, and the system is adopted With two kinds of WDM and FDM.For this point, Figure 14 illustrates the distributed communication system 200 based on optical fiber.Distribution based on optical fiber Formula communication system 200 is using the WDM and WDD of the distributed communication system 180 based on optical fiber of Figure 12 together with Figure 13 based on light The FDM and FDD of fine distributed communication system 190.The down link signal of wavelength-division multiplex and the downlink letter of frequency division multiplexing It number is provided by downlink optical fiber 202D.The uplink signal of wavelength-division multiplex and the uplink signal of frequency division multiplexing pass through Uplink optical fiber 202U is provided.

Option and alternative can be provided for the above embodiment.Numerical data clothes in RAU or independent MC are provided Business interface may include more than one numerical data serve port.For example, with reference to figure 14, interchanger 203 is (for example, Ethernet Interchanger) it can be placed in RAU 14 to provide the RAU 14 that can be supported more than a numerical data serve port.HMC can have Integrated Ethernet switch, so that (for example) several AP can be attached to star-like system knot via cable (for example, 5/6/7 class cable) In structure.EtherChannel can be used for the control of distributed communication system and Ethernet media conversion layer based on optical fiber, management And/or it is communication objective.HMC can be single channel scheme or multichannel (for example, 12 (12) channels) scheme.Multichannel scheme Each channel is cheap than single channel scheme.Further, in addition to optical fiber, uplink electrical digital signal and downlink Electrical digital signal can be provided by medium (including (for example) conductive wire communication and/or wireless communication).

When RF signals of communication have the frequency for the frequency for being too close to digital data signal and provide FDM to avoid interference, It is converted under conversion or frequency in frequency of use.When the number for the baseband digital data signal for being contemplated that the frequency spectrum less than RF signals of communication When word base band transmission, the intermodulation distortion of RF signals of communication can be generated.Another method includes the following steps：To be higher than RF signals of communication Frequency convert digital data signal upwards, and will also (for example) be modulated for digital data signal constant envelope modulation format. Frequency shift keying (FSK) and minimum frequency shift keying (MSK) are modulated to the example suitable for the modulation format.Further, with In the case of the FDM of digital data service, it is contemplated that advanced modulation formats with by optical fiber identical with RF signals of communication with High data rate (for example, (1) Gb or ten (10) Gb) transmits.Use (with (for example) 8-FSK or 16-QAM) single carrier Or the kinds of schemes of multicarrier (OFDM) is possible.

Further, as used herein, term " fiber optic cables " and/or " optical fiber " are intended to include all types of lists Mould and multimode lightguide, including one or more optical fiber, the optical fiber can plated film, colouring, buffering, at band and/or in cable Other institutional frameworks or safeguard structure, for example, one or more pipe, strength member, outer covers etc..Optical fiber disclosed herein can For single mode optical fiber or multimode fibre.Similarly, other types of suitable optical fiber includes being bent non-sensitive optical fiber or being used for transmission light Any other emergent object of the medium of signal.Be bent non-sensitive or resist bending optical fiber example be can be from Corning Incorporated. it buysMultimode fibre.For example, in U.S. Patent Application No. 2008/0166094 Number and No. 2009/0169163 in the appropriate optical fiber of the type disclosed, the full text of the publication of above-mentioned application case is to quote Mode is incorporated herein.

Embodiment those skilled in the art is by many modifications for expecting embodiment described herein and other realities Apply mode, the embodiment belonging to the modification and other embodiment is beneficial to be described above and be presented in correlative type Teaching.It will be understood, therefore, that specification and claims are not limited to disclosed particular implementation, also, change and other Embodiment is intended to be included in the range of additional claims.If the modifications and variations of embodiment are wanted in appended claims In the range of asking book and the equivalent of additional claims, then embodiment be intended to cover the embodiment modification and Variation.Although specific terms be employed herein, but the term is only used for general and descriptive sense rather than for limitation Purpose.

Claims

1. one kind by radio frequency (RF) communication and digital data service (DDS) for being assigned at least one remote antenna unit (RAU) distributing antenna system, the system include：

Front end unit (HEU), the front end unit are arranged to：

Receive at least one downlink electrical radio frequency signal of communication；

At least one downlink electrical radio frequency signal of communication is converted at least one downlink optical radio communication Signal, at least one downlink optical rf communication signal will be transmitted to described by least one communication downlink At least one remote antenna unit；

By at least one communication uplink, at least one uplink optical is received from least one remote antenna unit Learn rf communication signal；And

At least one optical uplink rf communication signal is converted into the electrical radio communication of at least one uplink Signal；And

Digital data service controller, the digital data service controller are arranged to：

Receive at least one downlink electric signal containing at least one digital data service；

It is to contain at least one by least one downlink transform electric containing at least one digital data service At least one downlink optical digital signal of a digital data service；

By at least one second communication downlink, by least one downlink containing at least one digital data service Link optical digital signal is provided at least one remote antenna unit；

By at least one second communication uplink, at least one uplink is received from least one remote antenna unit Road optical digital signal；And

At least one optical uplink digital signal is converted at least one uplink electrical digital signal,

Wherein described at least one communication downlink and at least one communication uplink include at least one optical fiber, with And

At least one of wherein described at least one downlink optical rf communication signal contains at least one number with described At least one of at least one downlink optical digital signal of digital data service is distributed by common fiber.

2. distributing antenna system as described in claim 1, the system further includes at least one wavelength division multiplexer (WDM), at least one wavelength division multiplexer be arranged to by least one fiber optic communication downlink with different wave length come At least one downlink optical rf communication signal described in wavelength-division multiplex and at least one downlink optical number letter Number.

3. distributing antenna system as claimed in claim 2, the system further includes：

At least one Wave decomposing multiplexer (WDD), at least one Wave decomposing multiplexer and at least one remote antenna Unit is associated, and be arranged to by least one downlink optical rf communication signal with it is described it is at least one under Line link optical digital signal separates, and at least one downlink optical digital signal is by least one communication Down-link reception；And

At least one wavelength division multiplexer (WDM), at least one wavelength division multiplexer and at least one remote antenna unit It is associated, and be arranged to through at least one communication uplink with different wave length come described in wavelength-division multiplex at least one A optical uplink rf communication signal and at least one optical uplink digital signal.

4. distributing antenna system as claimed in claim 3, the system further includes at least one Wave decomposing multiplexer (WDD), at least one Wave decomposing multiplexer is arranged at least one optical uplink rf communication signal It is separated at least one optical uplink digital signal, at least one optical uplink digital signal is to pass through What at least one communication uplink received.

5. distributing antenna system as claimed in claim 2, the system further includes at least one frequency division multiplexer (FDM), at least one frequency division multiplexer be arranged to by least one communication downlink with different frequency come At least one downlink electrical radio frequency signal of communication and at least one downlink electric signal described in frequency division multiplexing.

6. distributing antenna system as claimed in claim 5, the system further includes at least one frequency division demultiplexer (FDD), at least one frequency division demultiplexer is associated at least one remote antenna unit, and is arranged in the future From at least one downlink electrical radio frequency signal of communication and described at least one of at least one communication downlink A downlink electric signal separates.

7. distributing antenna system as claimed in claim 5, the system further includes at least one frequency division multiplexer (FDM), at least one frequency division multiplexer is associated at least one remote antenna unit, and is arranged to different frequencies Rate carrys out at least one uplink electrical radio communication letter of the frequency division multiplexing from least one communication uplink Number and at least one uplink electrical digital signal.

8. distributing antenna system as claimed in claim 7, the system further includes at least one frequency division demultiplexer (FDD), at least one frequency division demultiplexer be arranged to will from described at least one communication uplink extremely A few electrical rf communication signal of uplink is separated at least one uplink electrical digital signal.

9. distributing antenna system as claimed in claim 2, wherein at least one communication downlink and it is described at least One communication uplink includes at least one optical fiber, and

At least one of wherein described at least one downlink optical rf communication signal and at least one downlink chain At least one of road optical digital signal is distributed with different wave length by common fiber.

10. distributing antenna system as claimed in claim 8, wherein at least one communication downlink and it is described at least One communication uplink includes at least one optical fiber, and

At least one of wherein described at least one downlink optical rf communication signal and at least one downlink chain At least one of road optical digital signal is distributed with different frequency by common fiber.

11. distributing antenna system as claimed in claim 2, wherein the digital data service controller is further set With：

By at least one second communication uplink, at least one second is received from least one medium converter (MC) Optical uplink digital signal；And

At least one second optical uplink digital signal is converted at least one second uplink electrical digital Signal.

12. distributing antenna system as claimed in claim 2, wherein at least one digital data service is made of group, The group is by Ethernet, WLAN (WLAN), global intercommunication microwave access (WiMax), digital subscriber line (DSL) and length Phase evolution (LTE) forms.

13. distributing antenna system as described in claim 1, wherein the digital data service controller is arranged to from number Digital data service switch receives at least one downlink electric signal for containing at least one digital data service.

14. one kind by radio frequency (RF) communication and digital data service (DDS) for being assigned at least one remote antenna unit (RAU) distributing antenna system, the system include：

Front end unit (HEU), the front end unit are arranged to：

At least one optical uplink digital signal is converted at least one uplink electrical digital signal；And

At least one frequency division multiplexer (FDM), at least one frequency division multiplexer are arranged to logical by least one optical fiber Common fiber in letter downlink is carried out at least one downlink optical radio communication described in frequency division multiplexing with different frequency and is believed Number and at least one downlink optical digital signal.

15. distributing antenna system as claimed in claim 14, the system further includes at least one frequency division demultiplexing Device (FDD), at least one frequency division demultiplexer is associated at least one remote antenna unit, and is arranged to By from least one communication downlink at least one downlink electrical radio frequency signal of communication with it is described extremely A few downlink electric signal separates.

16. distributing antenna system as claimed in claim 15, the system further includes：

At least one frequency division multiplexer (FDM), at least one frequency division multiplexer and at least one remote antenna unit It is associated, and be arranged to different frequency and carry out frequency division multiplexing from described at least one communication uplink at least one A electrical rf communication signal of uplink and at least one uplink electrical digital signal；And

At least one frequency division demultiplexer (FDD), at least one frequency division demultiplexer is arranged to will be described at least At least one electrical rf communication signal of uplink of one communication uplink and at least one uplink Electrical digital signal separates.

17. one kind by radio frequency (RF) communication and digital data service (DDS) for being assigned at least one remote antenna unit (RAU) distributing antenna system, the distributing antenna system include：

Front end unit (HEU), the front end unit are arranged to：

By at least one second communication uplink, at least one uplink is received from least one remote antenna unit Road optical digital signal；

At least one optical uplink digital signal is converted at least one uplink

Electrical digital signal；And

At least one remote antenna unit (RAU), wherein each remote antenna list at least one remote antenna unit Member includes：

For light to electric (O/E) converter, the light to electric transducer is arranged to the downlink optical radio communication that will be received letter Number downlink electrical radio frequency signal of communication is converted to, and at least one is provided by the downlink electrical radio frequency signal of communication A first port；

Electricity is arranged to the electrical radio frequency of uplink that will be received from least one first port to light (E/O) converter Signal of communication is converted to optical uplink rf communication signal；And

Digital data service interface, the digital data service interface is couple at least one second port, and is arranged to：

Downlink optical digital signal is converted into downlink electric signal, at least one second end is arrived to provide Mouthful；And

The uplink electrical digital signal received from least one second port is converted into optical uplink number Signal.

18. distributing antenna system as claimed in claim 17, wherein the digital data service interface further includes electricity Source interface, the power interface is arranged to receive power supply, and provides the power supply at least one second port, and And wherein described at least one second port is arranged to support Power over Ethernet (PoE).

19. distributing antenna system as claimed in claim 18, wherein the digital data service interface be arranged to The power line provided in a few array cable receives the power supply.

20. distributing antenna system as claimed in claim 17, the system further includes the digital number of at least one support According to the equipment of service, at least one equipment for supporting digital data service is connected to via at least one second port At least one remote antenna unit, and the digital data service interface further includes power interface, the power interface It is arranged to receive power supply, and provides the power supply at least one second port, the power supply is arranged to institute It states at least one equipment for supporting digital data service to power, and is connected at least one remote antenna unit.

21. distributing antenna system as claimed in claim 17, the system further includes medium converter, the media Converter is associated at least one remote antenna unit, and is arranged to by least one described in the extremely front end unit A second communication uplink reports performance data to the front end unit, and

The wherein described front end unit is arranged to that the medium converter is controlled and managed according to the performance data.