TWM628644U - Distributed antenna system for 5G network - Google Patents

Abstract

A distributed antenna system suitable for 5G network, including a centralized unit, a decentralized unit, a radio unit, a head-end unit and a remote antenna unit, the centralized unit receives the downlink radio frequency signal and outputs it to the decentralized unit, and the decentralized unit receives the downlink radio frequency signal and outputs to the radio unit; the head-end unit includes a downlink electro-optical converter and a downlink multiplexer, and the downlink electro-optical converter converts the downlink radio frequency signal into a downlink optical signal; the downlink multiplexer integrates the downlink optical signal into an integrated downlink optical signal; the remote antenna unit It includes a downlink demultiplexer, a downlink photoelectric converter and an antenna circuit board. The downlink demultiplexer distributes and outputs each downlink optical signal in the integrated downlink optical signal; the downlink photoelectric converter converts the downlink optical signal into a downlink RF signal for output; the antenna The circuit board receives the downlink radio frequency signal and outputs it through the antenna.

Description

Decentralized Antenna Systems for 5G Networks

A distributed antenna system, especially a distributed antenna system suitable for 5G networks.

With the vigorous development of modern wireless communication technology, the life of modern people is closely related to the Internet, and wireless Internet access has become one of the indispensable functions of various mobile devices, and the wireless Internet access function of mobile devices needs to rely on the base set up by the telecommunications industry. A network composed of a base station and an antenna transmits a radio frequency signal (Radio Frequency) for communication.

Generally, RF signals are easily hindered by terrain and buildings during the transmission process. Although RF signals can penetrate materials such as glass, wood or plastic, or can achieve signal transmission effects through reflection, RF signals are difficult to penetrate iron. Therefore, when the mobile device is located in a closed space on the inner side of the building, such as a basement or a closed elevator, the radio frequency signal of the base station is blocked by the walls and floors of the building, and cannot be transmitted to the mobile device. Similarly, the radio frequency signal of the mobile device cannot be transmitted to the base station, resulting in the inability to communicate between the base station and the mobile device, which in turn makes the mobile device prone to poor signal, or even unable to perform the function of wireless Internet access.

On the other hand, the current mobile communication technology is developing towards the fifth generation mobile networks (5G). The frequency band used by the 5G network includes the millimeter wave frequency band. The penetrating power of millimeter waves is weak, and when the frequency of the signal is higher, the coverage distance of the signal is also shorter, and the loss of the signal in the propagation path is also greater, resulting in the strength of the millimeter wave signal received by the mobile device may be too high. Weak or blocked by buildings.

In order to solve the problem of poor RF signal transmission in confined spaces and improve signal coverage, there is a distributed antenna system (Distributed Antenna System, DAS), including a head end unit (Head End Unit, HEU) and a plurality of remote ends Antenna unit (Remote Antenna Unit, RAU), the head-end unit can be set in an area that can stably receive the radio frequency signal transmitted by the base station, and is less blocked by the building structure, such as the top of the building, and communicates with the outside through wireless communication. A base station is connected, receives the radio frequency signal transmitted by the base station, converts the radio frequency signal into a transmission signal and transmits it to the back end by wired communication; the remote antenna units are distributed in areas with poor communication in the building, such as elevators Inside or basement, and the remote antenna units are connected to the head-end unit through wired communication, and after receiving the transmission signal transmitted by the head-end unit, the remote antenna units convert the transmission signal into the original signal of the base station. The transmitted radio frequency signals are transmitted outward through the antennas of the remote antenna units for reception by adjacent mobile devices.

However, the mobile communication technology used by the current distributed antenna systems is mostly the fourth mobile networks (4G), which makes it difficult to directly process the signals of the 5G network, so that the 5G network cannot pass through the existing distributed antennas. The system increases the coverage of the network. It can be seen that in response to the current development trend of mobile network technology towards 5G network, the 5G network cannot be received because the signal strength may be too weak or blocked by buildings. To solve the problem, the existing distributed antenna system is bound to need further improvement.

In view of this, the purpose of the present invention is to provide a distributed antenna system suitable for 5G network, in order to overcome the problem that the 5G network cannot increase the network coverage through the existing distributed antenna system.

In order to achieve the aforementioned purpose, the new distributed antenna system suitable for 5G network includes: a centralized unit, receiving and outputting downlink radio frequency signals; a dispersing unit, electrically connected to the centralized unit, receiving and outputting the downlink radio frequency signals; at least one radio unit, each of which is electrically connected to the dispersing unit to receive the downlink radio frequency Signal and output; at least one head-end unit, electrically connected to the radio unit, each of the head-end units includes: a plurality of downlink electro-optical converters, receiving the downlink radio frequency signal, and converting the downlink radio frequency signal into a downlink optical signal output; and A downlink multiplexer is electrically connected to each of the downlink electro-optical converters to receive the downlink optical signals output by each of the downlink electro-optical converters, and integrate each of the downlink optical signals into an integrated downlink optical signal output; at least one remote end antenna units, each of the remote antenna units is electrically connected to one of the head end units, and includes: a downlink demultiplexer, which is connected to the downlink multiplexer of the head end unit to receive the integrated downlink optical signal, and the Integrate each of the downlink optical signals in the downlink optical signals to distribute and output; a plurality of downlink photoelectric converters are respectively electrically connected to the downlink demultiplexer to receive one of the downlink optical signals output by the downlink demultiplexer, and the downlink optical The signal is converted into the downlink radio frequency signal and output; and a plurality of antenna circuit boards respectively have an antenna, and each of the antenna circuit boards is electrically connected to one of the downlink photoelectric converters to receive the downlink radio frequency signal and output through the antenna.

Correspondingly, the present invention provides another distributed antenna system suitable for 5G network, including: at least one remote antenna unit, including: a plurality of antenna circuit boards, each of which has an antenna, and receives an uplink radio frequency signal through the antennas , and output the upstream RF signal; a plurality of uplink electro-optical converters, respectively electrically connected to one of the antenna circuit boards, to receive the uplink radio frequency signal output by each of the antenna circuit boards, and convert the uplink radio frequency signal into an uplink optical signal output; and an uplink multiplexer , which is electrically connected to each of the upstream electro-optical converters to receive the upstream optical signals output by the upstream electro-optical converters, and integrate the upstream optical signals into an integrated upstream optical signal output; at least one head-end unit, each of the head The end unit includes: an uplink demultiplexer, connected to the uplink multiplexer of the at least one remote antenna unit, to receive the integrated uplink optical signal, and distribute the integrated uplink optical signals to each of the uplink optical signals output; a plurality of upstream photoelectric converters, respectively electrically connected to the upstream demultiplexer, to receive one of the upstream optical signals output by the upstream demultiplexer, and convert the upstream optical signal into the upstream radio frequency signal for output; a radio unit , each of the radio units is electrically connected to one of the head-end units to receive the uplink radio frequency signal and output; a distributed unit is electrically connected to each of the radio units to receive the uplink radio frequency signal and output; a centralized unit is electrically connected to the distributed unit , to receive and output the downlink RF signal.

The configurations of the aforementioned two distributed antenna systems correspond to each other (contrary to each other), so they are technically related to each other and have technical features corresponding to each other. The new distributed antenna system suitable for 5G network includes the centralized unit, the distributed unit and the at least radio unit required by the fifth generation mobile networks (5G), and the antenna for enhancing the signal The at least one head-end unit and the at least one remote antenna unit of the coverage area, and by connecting and signal transmission of each of the radio units and each of the head-end units, on the one hand, the centralized unit for processing 5G network signals and the The distributed unit, on the other hand, improves the coverage of the 5G signal by using the existing head-end units and the remote antenna units To avoid the problem that the 5G signal is shielded or weakened by the building block, so as to achieve the purpose of applying the distributed antenna system to 5G technology.

10: Centralized unit

20: Dispersion unit

30: Radio unit

31: Ethernet Powered Devices

32: circuit board

33: Transceiver

34: Analog front-end circuit

40: Head end unit

41: Downlink electro-optical converter

42: Downlink Multiplexer

43: Upstream Demultiplexer

44: Uplink photoelectric converter

45: Combiner

50: Remote Antenna Unit

51: Downstream Demultiplexer

52: Downlink photoelectric converter

53: Antenna circuit board

531: Antenna

532: Output attenuator

533: Output Amplifier

534: Duplexer

535: Receiver amplifier

536: Receive attenuator

537: Signal Strength Detector

54: Uplink electro-optical converter

55: Uplink Multiplexer

60: Base Station

70: Mobile Devices

Figure 1: A block diagram of the new distributed antenna system suitable for 5G networks.

Figure 2A: A block diagram of a radio unit in the present invention.

Figure 2B: A block schematic diagram of the head-end unit in the present invention.

FIG. 2C is a schematic block diagram of the circuit of the mid-to-remote antenna unit of the present invention.

Please refer to Figure 1. The distributed antenna system is a communication network composed of multiple spatially separated antenna nodes or components through various signal transmission media in a predetermined space or building. This new model is suitable for decentralized 5G networks. Distributed Antenna System (DAS), including: a centralized unit 10 (central unit, CU), a distributed unit 20 (distributed unit, DU), at least one radio unit 30 (radio unit, RU), at least one head For the end unit 40 and the at least one remote antenna unit 50 , in FIG. 1 , the at least one radio unit 30 is two radio units 30 and the at least one head end unit 40 is two head end units 40 as an example.

The centralized unit 10 is responsible for high-level protocols such as the Packet Data Convergence Protocol (PDCP) layer of the communication protocol and the Radio Resource Control (RRC) module; the decentralized unit 20 is electrically connected to the centralized unit 10 to process the transport layer in the protocol. and physical layers such as radio link control layer (RLC), medium access control sublayer (MAC) and physical layer (PHY), including baseband processing of signals and link control, wherein the centralized unit 10 and the decentralized unit 20 can be installed in the computer room, the centralized unit 10 is connected to a base station 60 through a user interface (U-Plane, UP) or a control interface (CP, C-Plane) through wired or wireless means, so that the centralized unit 10 Can receive downlink RF signals from the base station 60 or transmit to the base station 60 To transmit an uplink radio frequency signal, when the present invention is applied to a 5G network, the separation structure of the centralized unit 10 and the distributed unit 20 enables the 5G network to be connected between the centralized unit 10 and the distributed unit 20 according to the mid-transmission availability and network design. The units 20 are distributed using different protocol stacks, and the centralized unit 10 can be connected to a plurality of distributed units 20 to perform centralized management of the plurality of distributed units 20 through an intermediary, wherein the centralized unit and the distributed unit They can be respectively a signal processing device in a 5G base station.

As shown in FIG. 2A , the at least one radio unit 30 is connected to the distributed unit 20 by wire or wirelessly, and is responsible for the radio frequency transmission of signals, and each of the radio units 30 may include an Ethernet power supply device 31 (Power over Ethernet). , PoE), a circuit board 32, a transceiver 33 and an analog front end circuit 34 (analog front end, AFE), the circuit board 32 is electrically connected to the Ethernet power supply equipment 31, and the transceiver 33 is electrically connected to the circuit The board 32 , the analog front-end circuit 34 is electrically connected to the transceiver 33 .

Each of the head-end units 40 is respectively connected to one of the radio units 30 for signal transmission with each of the radio units 30 , one head-end unit 40 corresponds to one radio unit 30 ; the at least one remote antenna unit 50 is connected to each of the head-end units 40 , one head-end unit 40 may correspond to a plurality of remote antenna units 50, and one remote antenna unit 50 may correspond to one head-end unit 40, wherein, the at least one remote antenna unit 50 may be arranged in a poor reception area, such as In an indoor confined space, a basement, an elevator, etc., it is wirelessly connected to at least one mobile device 70, so that the at least one remote antenna unit 50 can transmit downlink radio frequency signals to the at least one mobile device 70 or from the at least one mobile device 70. The mobile device 70 receives an uplink radio frequency signal.

The new distributed antenna system suitable for 5G network can implement data downlink (Downlink). The following diagrams illustrate that the new distributed antenna system suitable for 5G network performs data downlink, and transmits data from the base station 60 to the user terminal (mobile device 70) technical means.

The concentration unit 10 can receive the downlink radio frequency signal from the base station 60 . After the downlink radio frequency signal is processed by the concentration unit 10 and the dispersing unit 20 , the distributing unit 20 transmits the downlink radio frequency signal. The downlink radio frequency signal is transmitted to each of the radio units 30 , and each of the radio units 30 transmits the downlink radio frequency signal to the outside.

As shown in FIG. 2B , each of the head-end units 40 includes a plurality of downstream electro-optical converters 41 and at least a downstream multiplexer 42 . FIG. 2B takes one downstream multiplexer 42 as an example, and each of the downstream electro-optical converters 41 respectively The analog front-end circuit 34 of one of the radio units 30 is connected to receive the downlink radio frequency signal output by the radio unit 30, perform electro-optical conversion on each of the downlink radio frequency signals, and convert each of the downlink radio frequency signals into one of a different wavelength. The downlink multiplexer 42 is electrically connected to each of the downlink electrical-to-optical converters 41 to receive the downlink optical signals output by each of the downlink electrical-to-optical converters 41, and to integrate the downlink optical signals into an integrated Downlink optical signal and output. In other embodiments, each of the head-end units 40 may include a plurality of downlink multiplexers 42 , and each of the downlink multiplexers 42 is electrically connected to a plurality of the downlink electrical-to-optical converters 41 .

As shown in FIG. 2C , each of the remote antenna units 50 includes at least a downlink demultiplexer 51 , a complex downlink photoelectric converter 52 and a complex antenna circuit board 53 . FIG. 2C takes a downlink demultiplexer 51 as an example. , the downlink demultiplexer 51 is electrically connected to the downlink multiplexer 42 of the head-end unit 40 to receive the integrated downlink optical signal, and distribute and output each of the integrated downlink optical signals to each The downstream photoelectric converters 52, each of which is electrically connected to the downstream demultiplexer 51, respectively, to receive one of the downstream optical signals, perform photoelectric conversion on the downstream optical signals, and convert the downstream optical signals into The downlink radio frequency signal is returned and output, and each of the antenna circuit boards 53 is electrically connected to one of the downlink photoelectric converters 52 to receive the downlink radio frequency signal output by each of the downlink photoelectric converters 52 and output, wherein the remote antenna Each of the antenna circuit boards 53 of the unit 50 transmits each of the downlink radio frequency signals to the at least one mobile device 70 through an antenna 531 to complete the data downlink procedure between the at least one mobile device 70 and the base station 60, and the The number of the complex antenna circuit boards 53 is the same as the number of the complex downlink photoelectric converters 52 , and each antenna circuit board 53 corresponds to one downlink photoelectric converter 52 .

Each of the downstream electro-optical converters 41 can be a CWDM Laser Diode, each of the downstream electro-optical converters 52 can be a photodiode, and the at least one head end The downlink multiplexer 42 of the unit 40 is connected to the downlink demultiplexer 51 in the at least one remote antenna unit 50 through an optical fiber, and the downlink multiplexer 42 may be a coarse wavelength division multiplexing conversion multiplexer. CWDM MUX, the downlink demultiplexer 51 can be a coarse wavelength division multiplexing conversion demultiplexer (CWDM DEMUX), the downlink multiplexer 42 converts different wavelengths through coarse wavelength division multiplexing technology Each of the downlink optical signals is combined into a single integrated downlink optical signal, so that each of the downlink optical signals can be transmitted through a single optical fiber at the same time, saving optical fiber resources required for signal transmission, and increasing the amount of data that can be carried by a single signal transmission; Correspondingly, the downlink demultiplexer 51 also decomposes the downlink optical signals of different wavelengths from the integrated downlink optical signal through the coarse wavelength division multiplexing technology, and then distributes them to the downlink photoelectric converters 52 .

Each of the antenna circuit boards 53 in each of the remote antenna units 50 further includes an output attenuator 532 and an output amplifier 533 , and each of the output attenuators 532 of each of the antenna circuit boards 53 is connected to each of the antenna circuit boards 53 . The corresponding downlink photoelectric converter 52 receives the photoelectrically converted downlink radio frequency signal, and attenuates the power of the downlink radio frequency signal for output. The output ends of the output amplifiers 533 are electrically connected to the output attenuators 532 . Receive the downlink radio frequency signal after power attenuation, and amplify the power of the downlink radio frequency signal after power attenuation, for each antenna 531 of each antenna circuit board 53 to output, through the output attenuator 532 and the output amplifier 533 to adjust the power of the downlink RF signal output by the antennas 531 of the antenna circuit boards 53 , wherein each of the output attenuators 532 can be a digital step attenuator.

Each of the antenna circuit boards 53 in each of the remote antenna units 50 may further include a duplexer 534, and each of the duplexers 534 is connected to each of the antennas 531, each of the receiving amplifiers 535 and each of the output amplifiers Between 533, it means that when the new model implements both data upstream and data downstream, each of the duplexers 534 is connected to the input end of each upstream RF signal and the output of each downstream RF signal The terminal is used to isolate the input of each upstream radio frequency signal and the output of each of the downstream radio frequency signals, so as to prevent the input signal and the output signal from interfering with each other.

Corresponding to the aforementioned data downlink, the new distributed antenna system suitable for 5G networks can implement data uplink. The following diagrams illustrate that the new type of distributed antenna system suitable for 5G networks performs data uplink, and transmits data from the client to the The technical means at the 60 end of the base station. Further, the present invention can also implement both data uplink and data downlink. When the present invention has both data uplink and data downlink implementations, the antenna circuit board 53 used for data uplink and the antenna circuit board 53 used for data downlink. It is the same antenna circuit board 53 .

1, 2B and 2C, the at least one remote antenna unit 50 is a plurality of remote antenna units 50 as an example, each of the remote antenna units 50 includes a plurality of antenna circuit boards 53, a plurality of uplink electro-optical conversions 54 and at least one uplink multiplexer 55, FIG. 2C is an example of an uplink multiplexer 55, each of the antenna circuit boards 53 has an antenna 531, and each of the antenna circuit boards 53 receives an uplink through each of the antennas 531. The radio frequency signal is output, and each of the uplink electro-optical converters 54 is electrically connected to one of the antenna circuit boards 53 to receive each of the uplink radio frequency signals output by each of the antenna circuit boards 53, and perform electro-optical conversion on each of the uplink radio frequency signals. to convert each of the upstream radio frequency signals into an upstream optical signal of different wavelengths and output them, the upstream multiplexer 55 is electrically connected to each of the upstream electrical-to-optical converters 54 to receive the output of the upstream electrical-to-optical converters 54 Uplink optical signal, integrating each of the uplink optical signals into an integrated uplink optical signal and outputting, wherein, the at least one remote antenna unit 50 is within the receiving range of each of the antennas 531 to receive the transmitted data from the at least one mobile device 70 For the upstream RF signal, the number of the plurality of antenna circuit boards 53 is the same as the number of the plurality of upstream electrical-to-optical converters 54 , and each antenna circuit board 53 corresponds to an upstream electrical-to-optical converter 54 .

The at least one head-end unit 40 is a plurality of head-end units 40 for example, each of the head-end units 40 includes at least one uplink demultiplexer 43, a plurality of uplink photoelectric converters 44 and at least one combiner 45 (combiner), FIG. 2B Taking two uplink demultiplexers 43 and two combiners 45 as an example, the uplink demultiplexer 45 The multiplexer 43 is connected to the upstream multiplexer 55 of the at least one remote antenna unit 50 to receive the integrated upstream optical signal, and distribute and output each of the upstream optical signals in the integrated upstream optical signal to each of the upstream optical signals Photoelectric converters 44, each of the upstream photoelectric converters 44 is electrically connected to the upstream demultiplexer 43, respectively, to receive one of the upstream optical signals, perform photoelectric conversion on the upstream optical signal, and convert the upstream optical signal back to the upstream optical signal. The upstream radio frequency signal is output, and the combiner 45 is electrically connected with each of the upstream photoelectric converters 44 to receive the upstream radio frequency signal output by each of the upstream photoelectric converters 44 and output, wherein the combination of the head-end units 40 The device 45 transmits each of the upstream RF signals to the analog front-end circuit 34 of each of the radio units 30 .

The analog front-end circuit 34 of each of the radio units 30 is electrically connected to the combiner 45 of one of the head-end units 40 to receive the uplink radio frequency signal transmitted by the combiner 45, and each of the radio units 30 transmits the uplink radio frequency signal to the dispersing unit 20, and the distributing unit 20 transmits the uplink radio frequency signal to the concentrating unit 10. After the uplink radio frequency signal is processed by the concentrating unit 10 and the dispersing unit 20, the concentrating unit 10 sends the signal to the distributing unit 20. The uplink radio frequency signal is transmitted to the base station 60 to complete the procedure of data uploading between the at least one mobile device 70 and the base station 60 .

Each of the upstream electro-optical converters 54 can be a CWDM Laser Diode, each of the upstream electro-optical converters 44 can be a photodiode, the at least one remote The uplink multiplexer 55 in the end antenna unit 50 and the uplink demultiplexer 43 in each of the head-end units 40 can be connected through an optical fiber, and the uplink multiplexer 55 can be a coarse wavelength division multiplexing A conversion multiplexer (CWDM MUX), the upstream demultiplexer 43 can be a coarse wavelength division multiplexing conversion demultiplexer (CWDM DEMUX), and the upstream multiplexer 55 converts the The upstream optical signals of different wavelengths are combined into a single integrated upstream optical signal, so that the upstream optical signals can be transmitted through a single optical fiber at the same time, saving the optical fiber resources required for signal transmission, and increasing the data that can be carried by a single signal transmission Relatively, the upstream demultiplexer 43 also transmits the coarse wavelength demultiplexer The respective upstream optical signals of different wavelengths are decomposed from the integrated upstream optical signal by the engineering technology, and then distributed to the respective upstream optical-to-electrical converters 44 .

Referring to FIG. 2C , each of the antenna circuit boards 53 in the at least one remote antenna unit 50 further includes a receive amplifier 535 , a receive attenuator 536 and a signal strength detector 537 . The input terminal is electrically connected to each of the antennas 531 of each of the antenna circuit boards 53 to receive the uplink radio frequency signal received by each of the antennas 531, and to amplify the power of the uplink radio frequency signal for output. The input terminal of the receiving attenuator 536 is electrically The output end of the receiving amplifier 535 is connected to the output end of the receiving attenuator 536, and the output end of the receiving attenuator 536 is electrically connected to one of the upstream electro-optical converters 54 to receive the upstream radio frequency signal after power amplification, and output the upstream radio frequency signal after power attenuating to a The corresponding upstream electro-optical converter 54 adjusts the power of the upstream RF signal input to the upstream electro-optical converter 54 through the coordinated operation of the receiving amplifier 535 and the receiving attenuator 536, and the signal strength detector 537 The output terminal of the receiving amplifier 535 is electrically connected to measure the signal strength of the uplink RF signal after power amplification by the receiving amplifier 535 , wherein each of the receiving attenuators 536 can be a digital step attenuator.

In the novel decentralized antenna system suitable for 5G network, the centralized unit 10, the decentralized unit 20 and the at least one radio unit 30 can use the fifth generation mobile networks (5G) for mobile devices 5G network communication between 70 and base station 60, and the at least one head-end unit 40 and the at least one remote antenna unit 50 may be existing equipment already installed in each building, by connecting each of the radio units 30 For connection and signal transmission with each of the head-end units 40, on the one hand, the centralized unit 10 and the distributed unit 20 for processing 5G network signals are reserved, and on the other hand, through the existing head-end units 40 and the remote units The antenna unit 50 enhances the coverage of the 5G signal and avoids the problem that the 5G signal is shielded or weakened by the building block.

10: Centralized unit

20: Dispersion unit

30: Radio unit

40: Head end unit

50: Remote Antenna Unit

60: Base Station

70: Mobile Devices

Claims (10)

A distributed antenna system suitable for 5G network, comprising: a centralized unit, receiving and outputting downlink radio frequency signals; a decentralized unit, electrically connected to the centralized unit, receiving and outputting the downlink radio frequency signals; at least one radio unit, each The radio unit is electrically connected to the dispersing unit to receive and output the downlink radio frequency signal; at least one head-end unit is electrically connected to the radio unit, and each of the head-end units includes: a plurality of downlink electro-optical converters to receive the downlink radio frequency signal, and converting the downlink radio frequency signal into a downlink optical signal output; and a downlink multiplexer, electrically connected to each of the downlink electro-optical converters, to receive the downlink optical signal output by each of the downlink electro-optical converters, and to convert each of the downlink The optical signal is integrated into an integrated downlink optical signal output; at least one remote antenna unit, each of which is electrically connected to one of the head-end units, includes: a downlink demultiplexer connected to the downlink of the head-end unit a multiplexer, for receiving the integrated downlink optical signal, and distributing and outputting each of the downlink optical signals in the integrated downlink optical signal; a plurality of downlink photoelectric converters, respectively electrically connected to the downlink demultiplexer, to receive the downlink demultiplexer One of the downlink optical signals output by the multiplexer converts the downlink optical signal into the downlink radio frequency signal and outputs it; and a plurality of antenna circuit boards respectively have an antenna, and each of the antenna circuit boards is electrically connected to one of the downlink photoelectric converters, so as to The downlink radio frequency signal is received and output through the antenna. The distributed antenna system suitable for 5G network according to claim 1, wherein each of the radio units includes a power over Ethernet (PoE), a circuit board, a transceiver and an analog front end A circuit (analog front end, AFE) to which the circuit board is electrically connected to the Ethernet network Power supply equipment, the transceiver is electrically connected to the circuit board, the analog front-end circuit is electrically connected to the transceiver, and the analog front-end circuit is connected to each of the downlink electro-optical converters of one of the head-end units. According to the distributed antenna system applicable to 5G network as described in claim 1, each of the downlink electro-optical converters is a CWDM Laser Diode, and each of the downlink electro-optical converters is a photodiode, the downlink multiplexer is a coarse wavelength division multiplex conversion multiplexer (CWDM MUX), and the downlink demultiplexer is a coarse wavelength division wave multiplex conversion demultiplexer (CWDM DEMUX). According to the distributed antenna system applicable to 5G network as described in claim 1, each of the antenna circuit boards includes: an output attenuator connected to the downlink photoelectric converter corresponding to each of the antenna circuit boards to receive the photoelectric The converted downlink radio frequency signal is output after power attenuating the downlink radio frequency signal; an output amplifier, the output end of the output amplifier is electrically connected to the output attenuator to receive the power attenuated downlink radio frequency signal, and to The attenuated downlink radio frequency signal is subjected to power amplification for output by a corresponding antenna; and a duplexer is connected between the output end of the output amplifier and the corresponding antenna. According to the distributed antenna system applicable to 5G network described in claim 1, the antenna circuit board of each of the remote antenna units receives an uplink radio frequency signal, and each of the remote antenna units includes: a plurality of uplink electro-optical converters, respectively One of the antenna circuit boards is electrically connected to receive the uplink radio frequency signal output by each of the antenna circuit boards, and the uplink radio frequency signal is converted into an uplink optical signal for output; and an uplink multiplexer is electrically connected to each of the uplink an electro-optical converter for receiving the upstream optical signal output by each of the upstream electro-optical converters, and integrating each of the upstream optical signals into an integrated upstream optical signal output; Each of the head-end units includes: an uplink demultiplexer connected to the uplink multiplexer of the at least one remote antenna unit to receive the integrated uplink optical signal, and each of the integrated uplink optical signals Uplink optical signal distribution output; a plurality of uplink photoelectric converters are respectively electrically connected to the uplink demultiplexer to receive one of the uplink optical signals output by the uplink demultiplexer, and convert the uplink optical signal into the uplink radio frequency signal for output ; wherein, each of the radio units receives the uplink radio frequency signal output by one of the head-end units, and each of the radio units transmits the uplink radio frequency signal to the dispersing unit, and the dispersing unit transmits the uplink radio frequency signal to the centralized unit , the upstream radio frequency signal is output by the centralized unit. According to the distributed antenna system applicable to 5G network as described in claim 5, each antenna circuit board comprises: a receiving amplifier, which receives the uplink radio frequency signal received by the antenna, and amplifies the power of the uplink radio frequency signal and outputs it ; a receiving attenuator, the input end of the receiving attenuator is electrically connected to the output end of the receiving amplifier, and the output end of the receiving attenuator is electrically connected to one of the up-going electro-optical converters, to receive the up-going radio frequency signal after power amplification, The power of the upstream RF signal is attenuated and output to the corresponding upstream electro-optical converter; a signal strength detector is electrically connected to the output end of the receiving amplifier to detect the signal strength of the upstream RF signal; and a duplexer The device is connected between the input end of the receiving amplifier and the antenna. According to the distributed antenna system applicable to 5G network as described in claim 5, each of the upstream electro-optical converters is a CWDM Laser Diode, and each of the upstream electro-optical converters is A photodiode (Photodiode), the upstream multiplexer is a coarse wavelength demultiplexer The uplink demultiplexer is a coarse wavelength division multiplexing demultiplexer (CWDM DEMUX). A distributed antenna system suitable for 5G network, comprising: at least one remote antenna unit, comprising: a plurality of antenna circuit boards, each having an antenna, receiving an uplink radio frequency signal through the antennas, and outputting the uplink radio frequency signal a plurality of uplink electro-optical converters, respectively electrically connected to one of the antenna circuit boards to receive the uplink radio frequency signal output by each of the antenna circuit boards, and convert the uplink radio frequency signal into an uplink optical signal output; and an uplink multiplexer The device is electrically connected to each of the upstream electro-optical converters to receive the upstream optical signals output by the upstream electro-optical converters, and integrate the upstream optical signals into an integrated upstream optical signal output; at least one head-end unit, each of the The head-end unit includes: an uplink demultiplexer connected to the uplink multiplexer of the at least one remote antenna unit to receive the integrated uplink optical signal, and each of the uplink optical signals in the integrated uplink optical signal Distributed output; a plurality of upstream photoelectric converters, respectively electrically connected to the upstream demultiplexer, to receive one of the upstream optical signals output by the upstream demultiplexer, and convert the upstream optical signal into the upstream radio frequency signal for output; at least one a radio unit, each of the radio units is electrically connected to one of the head-end units to receive and output the uplink radio frequency signal; a dispersing unit is electrically connected to each of the radio units to receive the uplink radio frequency signal and output; a centralized unit is electrically connected to the The dispersing unit is used to receive and output the upstream radio frequency signal. The distributed antenna system suitable for 5G networks as described in claim 8, each of the antenna circuit boards includes: a receiving amplifier, which receives the uplink radio frequency signal received by the antenna, amplifies the power of the uplink radio frequency signal and outputs it; a receiving attenuator, the input end of the receiving attenuator is electrically connected to the output end of the receiving amplifier, the receiving attenuator The output end of the device is electrically connected to one of the upstream electro-optical converters to receive the power-amplified upstream radio frequency signal, attenuate the power of the upstream radio frequency signal, and output it to the corresponding upstream electro-optical converter; a signal strength detection The device is electrically connected to the output end of the receiving amplifier to detect the signal strength of the upstream radio frequency signal; and a duplexer is connected between the input end of the receiving amplifier and the antenna. According to the distributed antenna system applicable to 5G network as described in claim 8, each of the upstream electro-optical converters is a CWDM Laser Diode, and each of the upstream electro-optical converters is A photodiode (Photodiode), the upstream multiplexer is a coarse wavelength division multiplexing conversion multiplexer (CWDM MUX), and the upstream demultiplexer is a coarse wavelength division multiplexing conversion demultiplexer (CWDM DEMUX).

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