5g signal zooming based on fiber architecture and ftth coverage system

Abstract

This invention relates to a 5G signal extension and FTTH coverage system based on an optical fiber architecture, comprising an optical antenna array central office and user optical antenna units. The optical antenna array central office is located in a terminal equipment room or at a 5G small base station. The central office includes at least one transceiver unit, which receives radio frequency signals from the small base station and converts them into optical signals for transmission, and receives optical signals from the user optical antenna units and converts them into radio frequency signals for transmission. The user optical antenna units are located at the user's site and are used to receive downlink optical signals and transmit uplink optical signals. Each transceiver unit connects to multiple user optical antenna units, and each user optical antenna unit includes a first laser transceiver, a circulator, a user antenna, and a trigger detection circuit. This invention has a simple structure and is easy to install, which not only improves signal transmission efficiency and speed but also reduces architectural costs, while avoiding the risk of single-point failure and improving network reliability.

Description

Technical Field

[0001] This invention relates to a 5G signal extension and FTTH coverage system based on an optical fiber architecture, applicable to the field of 5G communication technology. Background Technology

[0002] 5G networks are an advanced network communication technology with significant advantages in transmission speed and stability, and are increasingly being widely applied across various industries. Currently, 5G networks achieve wireless transmission of 5G signals within their coverage area by deploying base stations. However, 5G signals have poor penetration through obstacles such as building walls, making it difficult for users to receive stable 5G signals in indoor settings such as homes and offices, causing significant inconvenience. To address this, existing technologies have emerged that introduce fiber optic cables from the base station into the indoor environment to solve the problem of 5G signal penetration. For example, the technology disclosed in patent CN113950062A involves setting up a near-end unit, a broadband and 5G converged extension device, and a far-end unit. The 5G air interface data signal is extracted from the intermediate frequency module of the 5G small base station, introduced indoors via fiber optic cable, modulated into a 5G NR signal, and radiated outwards, thus achieving indoor 5G signal coverage.

[0003] However, the above method is essentially equivalent to setting up a small 5G base station in each household, which is relatively expensive. Furthermore, although the method uses a tree-structured PON (Passive Optical Network) architecture to save fiber optic resources and achieve signal transmission between 5G small base stations and multiple user terminals, it still suffers from several drawbacks. Firstly, the method transmits signals point-to-point through near-end units to the converged expansion equipment, and then uses a splitter at the converged expansion equipment to achieve signal transmission with multiple user terminals. The process of the near-end unit coupling the 5G NR signal from the 5G small base station to the converged expansion equipment is still point-to-point, resulting in very limited signal transmission efficiency, which is difficult to adapt to the high speed and high efficiency of 5G networks. Secondly, the traditional PON network architecture used in this method heavily relies on the central office OLT for signal transmission, especially since the uplink of multiple user terminals requires overall control by the central office OLT, posing a significant risk of single-point failure and resulting in low network reliability. Summary of the Invention

[0004] To address the shortcomings of the existing technologies, this invention proposes a 5G signal extension and FTTH coverage system based on an optical fiber architecture.

[0005] The technical solution adopted in this invention includes an optical antenna array central office and a user optical antenna unit.

[0006] The optical antenna array central office is located in the terminal equipment room or at the 5G small base station. The central office includes at least one transceiver unit connected to the antenna array of the 5G small base station. The transceiver unit receives radio frequency signals transmitted by the 5G small base station antenna, converts them into optical signals, and transmits them to the user optical antenna unit; it also receives optical signals transmitted by the user optical antenna unit, converts them into radio frequency signals, and transmits them to the 5G small base station. Specifically, the transceiver units in the optical antenna array central office are connected one-to-one with the antenna array of the 5G small base station. The transceiver units transmit the corresponding antenna signals from the 5G small base station antenna array to the user optical antenna unit. The modulated RF signal is directly converted into an optical signal, which is then transferred to the transceiver unit without distortion and transmitted to the remote end. Correspondingly, the transceiver unit can also convert the uplink optical signal transmitted from the remote end back into an RF signal and transmit it back to the corresponding antenna of the 5G small base station antenna array. This realizes the remote extension of the 5G small base station antenna. Compared with the traditional method of receiving the air interface signal of the 5G small base station and transmitting it to the user end to be modulated into an NR signal, this invention does not require the setting up of a small base station at the user end, making the setup simpler and more convenient, and the setup cost lower.

[0007] User optical antenna units are installed at the user site and are used to receive downlink optical signals transmitted by the transceiver unit and to transmit uplink optical signals to the transceiver unit. Each transceiver unit connects to multiple user optical antenna units. Specifically, the transceiver unit and multiple user optical antenna units are connected through an optical splitter to realize the connection between a single transceiver unit and multiple user optical antenna units. Each user optical antenna unit includes a first laser transceiver for receiving and transmitting signals, a circulator connected to the first laser transceiver, a user antenna connected to the circulator, and a trigger detection circuit set in the uplink between the circulator and the first laser transceiver for monitoring the uplink and controlling the switch of the first laser transceiver. The trigger detection circuit includes a splitter for receiving uplink signals, a signal detector whose input is connected to one output of the splitter, and an electronic switch whose input is connected to the other output of the splitter and is used to control the uplink signal transmission end of the first laser transceiver to be turned on or off. The output of the signal detector is connected to the other input of the electronic switch, and the output of the electronic switch is connected to the first laser transceiver. Each user optical antenna unit receives downlink optical signals from its corresponding transceiver unit via a first laser transceiver. These downlink optical signals are then converted into downlink radio frequency (RF) signals and transmitted to the circulator. The user antenna then radiates these downlink RF signals to provide coverage at the user's location, enabling 5G network coverage in indoor spaces such as homes and offices. Simultaneously, the user antenna receives uplink RF signals from user CPE terminal devices (such as mobile phones) and transmits these uplink RF signals back to the first laser receiver via the circulator. The circulator prevents user antennas from transmitting and receiving signals independently, ensuring stable operation of the user optical antenna unit in receiving downlink RF signals and transmitting uplink RF signals. When the circulator transmits uplink RF signals, the uplink RF signal is split into two paths by a splitter. One path is sent to a signal detector. When the signal detector detects the uplink RF signal input, it sends a control command to the electronic switch. Upon receiving the control command, the electronic switch controls the uplink signal transmitter of the first laser receiver to turn on. The other uplink RF signal is transmitted to the first laser receiver via the electronic switch, converted into an uplink optical signal by the first laser receiver, and then transmitted back to the corresponding transceiver unit via the uplink signal transmitter. After the uplink signal transmission is completed, the electronic switch turns off the uplink signal transmitter of the first laser receiver.By controlling the uplink of the user optical antenna unit through a trigger detection circuit, when the user antenna receives the uplink signal from the terminal device, the uplink signal transmitter of the first laser receiver is turned on to ensure smooth uplink transmission and facilitate the transmission of uplink signals. After the uplink signal transmission is completed, the uplink signal transmitter of the first laser receiver is turned off to prevent interference between multiple user optical antenna units when transmitting uplink optical signals. This not only realizes a point-to-multipoint network architecture between the transceiver unit and multiple user optical antenna units, greatly improving signal transmission efficiency, but also avoids the dependence on the central office OLT in the traditional PON network architecture, avoiding the single point of failure risk brought by the central office OLT. It ensures network reliability while reducing network architecture costs.

[0008] Furthermore, each transceiver unit includes one or more second laser transceivers. When a transceiver unit includes multiple second laser transceivers, these transceivers are connected in parallel. The transceiver unit receives RF signals transmitted by the 5G small cell antenna array through the second laser transceivers and converts them into downlink optical signals for transmission to the remote end, or receives uplink optical signals transmitted from the remote end and converts them into RF signals for transmission back to the 5G small cell antenna array. When a transceiver unit includes multiple second laser transceivers, the other second laser transceivers can serve as backups to prevent signal link congestion when the uplink and downlink signal volumes are too high, ensuring the speed and efficiency of signal transmission.

[0009] Furthermore, the transceiver unit also includes a first bandpass filter connected in series in the uplink and downlink between the 5G small base station antenna array and the second laser transceiver, and a first signal amplifier connected in series in the uplink and downlink between the 5G small base station antenna array and the second laser transceiver. The first bandpass filter filters the signals received and transmitted by the transceiver unit to ensure the stability and purity of the 5G signal frequency band and avoid signal interference. At the same time, the first signal amplifier amplifies the signal, which not only avoids the impact of signal loss during signal transmission on signal strength, but also ensures that the signal returned by the user terminal equipment matches the original signal of the 5G small base station antenna.

[0010] Furthermore, an AGC control circuit for adjusting the gain of the first signal amplifier is connected in series between the second laser transceiver and the first bandpass filter in the uplink. The AGC control circuit modulates the gain of the backlink uplink signal, which not only ensures that the frequency band of the backlink signal matches the original signal of the 5G small base station antenna array, but also ensures the stability of the backlink signal. Specifically, the AGC control circuit can adopt existing technology.

[0011] Furthermore, the downlink port of the first laser transceiver is connected to the first port of the circulator, and the uplink port of the first laser transceiver is connected to the second port of the circulator. The user antenna is connected to the third port of the circulator. Specifically, the signal received by the first port of the circulator can only be transmitted from the third port, and the signal received from the third port can only be transmitted from the second port. After receiving the downlink optical signal transmitted by the transceiver unit, the first laser transceiver converts the downlink optical signal into a downlink radio frequency signal and transmits it to the first port of the circulator. The downlink radio frequency signal is then transmitted from the third port of the circulator to the user antenna for radiation coverage in the indoor area. When the user antenna receives the uplink radio frequency signal transmitted by the user CPE terminal equipment, the uplink radio frequency signal is received by the third port of the circulator and transmitted from the second port of the circulator to the first laser receiver. The first laser receiver converts the returned uplink radio frequency signal into an uplink optical signal and sends it to the transceiver unit, preventing the user antenna from transmitting and receiving on its own and ensuring the smooth operation of the user optical antenna unit.

[0012] Furthermore, a second bandpass filter is connected in series in both the uplink and downlink between the first laser transceiver and the circulator to further filter out noise in the transmitted signal and ensure the stability and purity of the 5G signal.

[0013] Furthermore, a second signal amplifier is connected in series in the uplink between the first laser transceiver and the circulator to amplify the uplink RF signal returned by the user's CPE terminal equipment, thereby avoiding signal transmission loss and the impact of low power of the terminal equipment on normal signal transmission.

[0014] Furthermore, the user optical antenna unit also includes at least one optical gateway unit connected to the first laser transceiver. When multiple optical gateway units are set, they are connected in parallel with each other. Specifically, the optical gateway units are set in other rooms of the user site and can be deployed using the existing fiber optic infrastructure in the home, so that 5G signal coverage can be provided in every room of the user site, thereby improving the coverage integrity of the 5G network.

[0015] Furthermore, the coverage system also includes a common optical antenna unit located in an outdoor area and connected to the transceiver unit. The common optical antenna unit includes at least one common optical antenna module. Specifically, the common optical antenna module includes a third laser transceiver, a second circulator connected to the third laser transceiver, and an outdoor antenna connected to the second circulator. The common optical antenna module extends the 5G signal to public areas such as corridors or communities, thereby improving the signal coverage and signal strength in outdoor areas.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0017] The fiber optic-based 5G signal extension and FTTH coverage system of this invention has a simple structure and is easy to set up. It not only realizes the extension of 5G signal coverage indoors, but also realizes point-to-multipoint 5G signal transmission, improving the signal transmission efficiency and speed of the network architecture. This allows the network architecture to adapt to the high speed and high efficiency of 5G, while also reducing the architecture cost of the network structure. At the same time, it avoids the risk of single point of failure in traditional network structures and improves the reliability of the network. Attached Figure Description

[0018] The following sections will describe some specific embodiments of the invention in a detailed manner, by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0019] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0020] Figure 2 yes Figure 1 The schematic diagram of the trigger detection circuit in the embodiment shown is as follows;

[0021] The reference numerals in the attached figures are explained as follows:

[0022] 1. Optical antenna array central office; 11. Transceiver unit; 111. Second laser transceiver; 112. First bandpass filter; 113. First signal amplifier; 114. AGC control circuit; 2. User optical antenna unit; 21. First laser transceiver; 22. Circulator; 23. User antenna; 24. Trigger detection circuit; 241. Two-way splitter; 242. Signal detector; 243. Electronic switch; 244. Driver; 25. Second bandpass filter; 26. Second signal amplifier; 27. Optical gateway unit; 3. Common optical antenna unit; 31. Common optical antenna module. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the technical features involved in the different embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Reference Appendix Figure 1-2The 5G signal extension and FTTH coverage system based on fiber optic architecture in this embodiment includes: optical antenna array central office 1 and user optical antenna unit 2.

[0026] The optical antenna array central office 1 is located in the terminal equipment room or at the 5G small base station. The optical antenna array central office 1 includes at least one transceiver unit 11 connected to the antenna array of the 5G small base station. The transceiver unit 11 is used to receive radio frequency signals transmitted by the 5G small base station antenna, convert them into optical signals, and transmit them to the user optical antenna unit 2; and to receive optical signals transmitted by the user optical antenna unit 2, convert them into radio frequency signals, and transmit them to the 5G small base station. Specifically, the transceiver units 11 in the optical antenna array central office 1 are connected one-to-one with the antenna array of the 5G small base station. The transceiver units 11 transmit the signals from the antenna array of the 5G small base station to the user optical antenna unit 2. The modulated RF signal emitted by the antenna is directly converted into an optical signal, which is then transferred to the transceiver unit 11 without distortion and transmitted to the remote end. Correspondingly, the transceiver unit 11 can also convert the uplink optical signal transmitted from the remote end back into an RF signal and transmit it back to the corresponding antenna of the 5G small base station antenna array. This realizes the remote extension of the 5G small base station antenna. Compared with the traditional method of receiving the air interface signal of the 5G small base station and transmitting it to the user end to be modulated into an NR signal, the present invention does not require the setting up of a small base station at the user end, making the setup simpler and more convenient, and the setup cost lower.

[0027] User optical antenna unit 2 is located at the user site and is used to receive downlink optical signals transmitted by transceiver unit 11 and to transmit uplink optical signals to transceiver unit 11. Each transceiver unit 11 connects to multiple user optical antenna units 2. Specifically, the transceiver unit 11 and multiple user optical antenna units 2 are connected through an optical splitter to realize point-to-multipoint connection between a single transceiver unit and multiple user optical antenna units. Each user optical antenna unit 2 includes a first laser transceiver 21 for receiving and transmitting signals, a circulator 22 connected to the first laser transceiver 21, a user antenna 23 connected to the circulator 22, and a user antenna 23 disposed between the circulator 22 and the first laser transceiver 21. The trigger detection circuit 24 in the uplink between transceivers 21 is used to monitor the uplink and control the switch of the first laser transceiver 21. The trigger detection circuit 24 includes a splitter 241 for receiving uplink signals, a signal detector 242 whose input is connected to one output of the splitter 241, and an electronic switch 243 whose input is connected to the other output of the splitter 241 and is used to control the uplink signal transmission end of the first laser transceiver 21 to be turned on or off. The output of the signal detector 242 is connected to the other input of the electronic switch 243, and the output of the electronic switch 243 is connected to the first laser transceiver 21.

[0028] Each user optical antenna unit 2 receives downlink optical signals emitted by its corresponding transceiver unit 11 through a first laser transceiver 21. It then converts the downlink optical signals into downlink radio frequency (RF) signals and transmits them to a circulator 22. The user antenna 23 then radiates the downlink RF signals to cover the user's premises, achieving 5G network coverage in indoor locations such as homes and offices. Simultaneously, the user antenna 23 receives uplink RF signals emitted by user CPE terminal devices (such as mobile phones) and transmits these uplink RF signals back to the first laser receiver 21 via the circulator 22. The circulator 22 prevents the user antenna 23 from self-transmitting and self-receiving, ensuring stable operation of the user optical antenna unit 2 in both receiving downlink and transmitting uplink RF signals. When the circulator 22 transmits the uplink RF signal, the uplink RF signal is split into two paths by the splitter 241. One path is sent to the signal detector 242. When the signal detector 242 detects the input of the uplink RF signal, it sends a control command to the electronic switch 243. After receiving the control command, the electronic switch 243 controls the uplink signal transmitter of the first laser receiver 21 to open. The other uplink RF signal is transmitted to the first laser receiver 21 via the electronic switch 243, and is converted into an uplink optical signal by the first laser receiver 21 and transmitted back to the corresponding transceiver unit 11 through the uplink signal transmitter. After the uplink signal transmission is completed, the electronic switch 243 closes the uplink signal transmitter of the first laser receiver 21. Specifically, the trigger detection circuit 24 also includes a driver 244 for driving the uplink signal transmitter of the first laser receiver 21. The driver 244 is connected in series between the electrical switch 143 and the splitter 241. When the uplink radio frequency signal passes through the driver 244, the driver 244 generates a power drive signal and transmits it to the first laser receiver 21, so as to drive the first laser receiver 21 to convert and transmit the received uplink radio frequency signal. The electronic switch 243 is set between the driver 244 and the first laser receiver 21 to facilitate the control of the transmission of the power drive signal, so as to realize the control of the uplink signal transmitter of the first laser receiver 21.

[0029] The uplink of the user optical antenna unit 2 is controlled by the trigger detection circuit 24. When the user antenna 23 receives the uplink signal sent by the terminal device, the uplink signal transmitter of the first laser receiver 21 is turned on to ensure the smooth uplink and facilitate the transmission of the uplink signal. After the uplink signal transmission is completed, the uplink signal transmitter of the first laser receiver 21 is turned off to prevent interference when multiple user optical antenna units 2 transmit uplink optical signals. This not only realizes the point-to-multipoint network architecture between the transceiver unit 11 and multiple user optical antenna units 21, which greatly improves the signal transmission efficiency, but also avoids the dependence on the central office OLT in the traditional PON network architecture and avoids the single point of failure risk brought by the central office OLT. While reducing the network architecture cost, it ensures the reliability of the network.

[0030] In a more preferred embodiment, each transceiver unit 11 includes one or more second laser transceivers 111. When a transceiver unit 11 includes multiple second laser transceivers 111, the multiple second laser transceivers 111 are connected in parallel with each other. The transceiver unit 11 receives RF radio frequency signals transmitted by the 5G small base station antenna array through the second laser transceivers 111 and converts them into downlink optical signals for transmission to the remote end, or receives uplink optical signals transmitted by the remote end and converts them into RF radio frequency signals for transmission back to the 5G small base station antenna array. When the transceiver unit 11 includes multiple second laser transceivers 111, the other second laser transceivers 111 can be used as backups to prevent signal link congestion when the uplink and downlink signal volume is too large, and to ensure the speed and efficiency of signal transmission.

[0031] In a more preferred embodiment, the transceiver unit 11 further includes a first bandpass filter 112 connected in series in the uplink and downlink between the 5G small base station antenna array and the second laser transceiver 111, and a first signal amplifier 113 connected in series in the uplink and downlink between the 5G small base station antenna array and the second laser transceiver 111. The first bandpass filter 112 filters the signals received and transmitted by the transceiver unit 11 to ensure the stability and purity of the 5G signal frequency band and avoid signal interference. At the same time, the first signal amplifier 113 amplifies the signal, which not only avoids the signal loss during signal transmission from affecting the signal strength, but also ensures that the signal returned by the user terminal equipment matches the original signal of the 5G small base station antenna.

[0032] In a more preferred embodiment, an AGC control circuit 114 for adjusting the gain of the first signal amplifier 113 is connected in series between the second laser transceiver 111 and the first bandpass filter 112 in the uplink. The AGC control circuit 114 modulates the gain of the backhauled uplink signal, which not only ensures that the frequency band of the backhauled signal matches the original signal of the 5G small base station antenna array, but also ensures the stability of the backhauled signal. Specifically, the AGC control circuit can be implemented by existing technology.

[0033] In a more preferred embodiment, the downlink port of the first laser transceiver 21 is connected to the first port of the circulator 22, and the uplink port of the first laser transceiver 21 is connected to the second port of the circulator 22. The user antenna 23 is connected to the third port of the circulator 22. Specifically, the signal received by the first port of the circulator 22 can only be transmitted from the third port, and the signal received from the third port can only be transmitted from the second port. After receiving the downlink optical signal transmitted by the transceiver unit 11, the first laser transceiver 21 converts the downlink optical signal into a downlink radio frequency signal and transmits it to the circulator. The first port of the circulator 22 transmits the downlink radio frequency signal from the third port of the circulator 22 to the user antenna 23 for radiation coverage in the indoor area. When the user antenna 23 receives the uplink radio frequency signal emitted by the user CPE terminal equipment, the uplink radio frequency signal is received by the third port of the circulator 22 and sent from the second port of the circulator 22 to the first laser receiver 21. The first laser receiver 21 converts the returned uplink radio frequency signal into an uplink optical signal and sends it to the transmit and receive unit 11, which prevents the user antenna 23 from self-transmitting and self-receiving and ensures the smooth operation of the user optical antenna unit 2.

[0034] In a more preferred embodiment, a second bandpass filter 25 is connected in series in both the uplink and downlink between the first laser transceiver 21 and the circulator 22 to further filter out noise in the transmitted signal and ensure the stability and purity of the 5G signal.

[0035] In a more preferred embodiment, a second signal amplifier 26 is connected in series in the uplink between the first laser transceiver 21 and the circulator 22 to amplify the uplink radio frequency signal returned by the user CPE terminal equipment, thereby avoiding signal transmission loss and the impact of low power of the terminal equipment on normal signal transmission.

[0036] In a more preferred embodiment, the user optical antenna unit 2 further includes at least one optical gateway unit 27 connected to the first laser transceiver 21. When multiple optical gateway units 27 are provided, they are connected in parallel with each other. Specifically, the optical gateway units 27 are located in other rooms of the user site and can be deployed using the existing fiber optic infrastructure in the home, so that 5G signal coverage can be provided in every room of the user site, thereby improving the coverage integrity of the 5G network.

[0037] In a more preferred embodiment, the coverage system further includes a common optical antenna unit 3 located in an outdoor area and connected to the transceiver unit 11. The common optical antenna unit 3 includes at least one common optical antenna module 31. Specifically, the common optical antenna module 31 includes a third laser transceiver, a second circulator connected to the third laser transceiver, and an outdoor antenna connected to the second circulator. The common optical antenna module extends the 5G signal to public areas such as corridors or communities, thereby improving the signal coverage and signal strength of the outdoor area.

[0038] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0039] The fiber optic-based 5G signal extension and FTTH coverage system of this invention has a simple structure and is easy to set up. It not only realizes the extension of 5G signal coverage indoors, but also realizes point-to-multipoint 5G signal transmission, improving the signal transmission efficiency and speed of the network architecture. This allows the network architecture to adapt to the high speed and high efficiency of 5G, while also reducing the architecture cost of the network structure. At the same time, it avoids the risk of single point of failure in traditional network structures and improves the reliability of the network.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A 5G signal extension and FTTH coverage system based on fiber optic architecture, characterized in that, include: Optical antenna array central office (1) and user optical antenna unit (2); The optical antenna array local end (1) is located in the terminal room or at the 5G small base station. The optical antenna array local end (1) includes at least one transceiver unit (11) connected to the antenna array of the 5G small base station. The transceiver unit (11) is used to receive the radio frequency signal sent by the antenna of the 5G small base station and convert it into an optical signal and send it to the user optical antenna unit (2), and to receive the optical signal sent by the user optical antenna unit (2) and convert it into a radio frequency signal and send it to the 5G small base station. The user optical antenna unit (2) is located at the user site and is used to receive downlink optical signals sent by the transceiver unit (11) and send uplink optical signals to the transceiver unit (11). Each transceiver unit (11) is connected to multiple user optical antenna units (2). Each user optical antenna unit (2) includes a first laser transceiver (21) for receiving and sending signals, a circulator (22) connected to the first laser transceiver (21), a user antenna (23) connected to the circulator (22), and a trigger detection circuit (24) located in the uplink between the circulator (22) and the first laser transceiver (21) for monitoring the uplink and controlling the first laser transceiver (21). When the user antenna (23) receives an uplink signal from the terminal device, the trigger detection circuit (24) triggers the signal. The detection circuit (24) turns on the uplink signal transmitting end of the first laser receiver (21). After the uplink signal is transmitted, the trigger detection circuit (24) turns off the uplink signal transmitting end of the first laser receiver (21). The trigger detection circuit (24) includes a splitter (241) for receiving uplink signals, a signal detector (242) whose input is connected to one output of the splitter (241), and an electronic switch (243) whose input is connected to the other output of the splitter (241) and is used to control the uplink signal transmitting end of the first laser transceiver (21) to turn on or off. The output of the signal detector (242) is connected to the other input of the electronic switch (243), and the output of the electronic switch (243) is connected to the first laser transceiver (21).

2. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 1, characterized in that: Each of the transceiver units (11) includes one or more second laser transceivers (111), and when the transceiver unit (11) includes a plurality of second laser transceivers (111), the plurality of second laser transceivers (111) are connected in parallel with each other.

3. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 2, characterized in that: The transceiver unit (11) further includes a first bandpass filter (112) connected in series in the uplink and downlink between the 5G small base station antenna array and the second laser transceiver (111), and a first signal amplifier (113) connected in series in the uplink and downlink between the 5G small base station antenna array and the second laser transceiver (111).

4. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 3, characterized in that: The second laser transceiver (111) is connected in series with the first bandpass filter (112) in the uplink, and an AGC control circuit (114) for adjusting the gain of the first signal amplifier (113).

5. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 1, characterized in that: The downlink port of the first laser transceiver (21) is connected to the first port of the circulator (22), and the uplink port of the first laser transceiver (21) is connected to the second port of the circulator (22). The user antenna (23) is connected to the third port of the circulator (22).

6. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 5, characterized in that: A second bandpass filter (25) is connected in series in both the uplink and downlink between the first laser transceiver (21) and the circulator (22).

7. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 6, characterized in that: A second signal amplifier (26) is connected in series in the uplink between the first laser transceiver (21) and the circulator (22).

8. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 1, characterized in that: The user optical antenna unit (2) further includes at least one optical gateway unit (27) connected to the first laser transceiver (21). When there are multiple optical gateway units (27), the multiple optical gateway units (27) are connected in parallel with each other.

9. The 5G signal extension and FTTH coverage system based on fiber optic architecture according to claim 1, characterized in that: The coverage system also includes a common optical antenna unit (3) located in an outdoor site and connected to the transceiver unit (11), the common optical antenna unit (3) including at least one common optical antenna module (31).

Images