Radio frequency active distribution system and signal transmission method

Abstract

The present application discloses a radio frequency active distribution system and a signal transmission method. Among them, the system includes: a proximal unit and at least one distal unit, and the proximal unit is connected to the at least one distal unit; the proximal unit is configured to send a target signal to the at least one distal unit, and the target signal includes: a mobile communication radio frequency signal and a near-far end synchronization and communication signal between the proximal unit and the distal unit; the distal unit includes: a common branch, a coverage branch, and a cascading branch, the common branch is configured to amplify the target signal to obtain an amplified target signal, the coverage branch is configured to output the amplified mobile communication radio frequency signal in the amplified target signal, the cascading branch is configured to transmit the amplified target signal to the next-level device, and the common branch is a branch shared by the coverage branch and the cascading branch. The present application solves at least the technical problem of limited remote transmission distance due to the distal unit.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and more particularly, to a radio frequency active distribution system and a signal transmission method. Background Art

[0002] In the 4G era of mobile communication, due to the relatively low operating frequency, passive indoor distribution was mainly used for indoor coverage, with high-power RRU (Radio Remote Unit) devices as the signal source, plus passive feeder lines, power splitters / combiners, and antennas. As the working frequency band of 5G mobile communication gets higher and higher, traditional passive indoor distribution does not support high frequency bands and has large losses in high frequency bands. The average power consumption of each coverage remote end is getting higher and higher, and traditional passive indoor distribution has no advantage in high frequency bands. 5G indoor coverage gradually adopts radio frequency active distribution systems (as Figure 1 shown), including a proximal unit and a remote unit, and radio frequency coaxial cables, network cables, or optical fibers are used for transmission between network elements. The remote unit is an active antenna. For easy indoor wiring connection, the remote units need to be cascaded. When the remote units are cascaded, in addition to transmitting mobile communication signals, it is also necessary to transmit TDD (Time Division Duplex) format time synchronization signals, near-end and remote-end communication signals, etc. using an out-of-band independent frequency point. The TDD format synchronization signal often adopts the independent frequency point OOK (a digital communication coding format) modulation method; the near / remote-end communication signals often adopt communication methods such as independent frequency point Bluetooth, CC1000, etc.

[0003] There are mainly two conventional cascading methods. The first method is to directly couple the signal at the upstream port of the remote unit and perform cascading, as Figure 2 shown. Although this method is simple, the remote transmission distance of the remote unit is limited. As the transmission distance increases and the number of cascades increases, the gain of the internal coverage branch of the remote unit needs to increase due to the increase in upstream transmission loss, which is prone to self-oscillation; at the same time, the near-end and remote-end synchronization and communication signals cannot meet the communication requirements due to too small received power. The second method is to filter out the near-end and remote-end synchronization and communication signals through a combiner at the upstream port of the remote unit, couple the mobile communication radio frequency signal at the output end of the coverage branch of the remote unit, then combine the cascaded coupled mobile communication radio frequency signal and the near-end and remote-end synchronization and communication signals through a combiner, and finally output through the downstream interface, as Figure 3 shown. Although this method can cascade and amplify the mobile communication radio frequency signal, it cannot amplify the near-end and remote-end synchronization and communication signals at the same time. There is also a problem that as the transmission distance increases and the number of cascades increases, the near-end and remote-end synchronization and communication cannot meet the communication requirements due to too small received power. At the same time, when coupling signals for cascading at the output port, the more cascades, the more noise. There is also a problem that the remote transmission distance of the remote unit is limited. Summary of the Invention

[0004] An embodiment of the present application provides a radio frequency active distribution system and a signal transmission method to at least solve the technical problem of limited remote transmission distance of remote units.

[0005] According to one aspect of the embodiments of the present application, a radio frequency active distribution system is provided, including: a proximal unit and at least one remote unit, the proximal unit is connected to the at least one remote unit; the proximal unit is configured to send a target signal to the at least one remote unit, the target signal includes: a mobile communication radio frequency signal and a near - remote synchronization and communication signal between the proximal unit and the remote unit; the remote unit includes: a common branch, a coverage branch, and a cascading branch, the common branch is configured to amplify the target signal to obtain an amplified target signal, the coverage branch is configured to output the amplified mobile communication radio frequency signal in the amplified target signal, the cascading branch is configured to transmit the amplified target signal to the next - level device, and the common branch is a branch shared by the coverage branch and the cascading branch.

[0006] Optionally, the common branch includes: a first switch, a first amplifier, and a second amplifier, the first switch is respectively connected to the first amplifier and the second amplifier; the first switch is configured to control the first amplifier to amplify the target signal during the downlink of the target signal; the second amplifier is configured to amplify the target signal during the uplink of the target signal.

[0007] Optionally, the remote unit further includes: a power distribution module; the power distribution module includes: a first power divider and a second power divider, one end of the first power divider is connected to the first amplifier, the other end of the first power divider is connected to the coverage branch, one end of the second power divider is connected to the second amplifier, and the other end of the second power divider is connected to the coverage branch; the first power divider is configured to respectively transmit the amplified target signal to the coverage branch and the cascading branch; the second power divider is configured to transmit the target signal to the common branch during the uplink of the target signal.

[0008] Optionally, the coverage branch includes: a third amplifier, a fourth amplifier, a second switch, and a first filter, one end of the third amplifier is connected to the common branch, the other end of the third amplifier is connected to the second switch, one end of the fourth amplifier is connected to the common branch, the other end of the fourth amplifier is connected to the second switch, and the first filter is connected to the second switch; the second switch is configured to control the fourth amplifier to amplify the target signal during the uplink of the target signal; the third amplifier is configured to amplify the target signal during the downlink of the target signal; the first filter is configured to filter out the amplified near - remote synchronization and communication signal in the amplified target signal to output the amplified mobile communication radio frequency signal.

[0009] Optionally, the cascaded branch includes: a fifth amplifier, a sixth amplifier, and a third switch. One end of the fifth amplifier is connected to the first power splitter, and the other end of the fifth amplifier is connected to the third switch. One end of the sixth amplifier is connected to the second power splitter, and the other end of the sixth amplifier is connected to the third switch. The third switch is used to control the sixth amplifier to amplify the target signal during the uplink process of the target signal. The fifth amplifier is used to amplify the target signal during the downlink process of the target signal.

[0010] Optionally, the system further includes: a third power splitter, a second filter, a radio frequency demodulator, and a synchronization processing chip. The third power splitter is respectively connected to the first switch and the second filter. The second filter, the radio frequency demodulator, and the synchronization processing chip are connected in sequence. The synchronization processing chip is further connected to the first switch, the second switch, and the third switch. The third power splitter is used to transmit the target signal to the common branch and the second filter respectively. The second filter is used to filter the target signal and then transmit the target signal to the radio frequency demodulator. The radio frequency demodulator is used to convert the target signal into a digital signal and send the converted target signal to the synchronization processing chip. The synchronization processing chip is used to extract the near-end and far-end synchronization and communication signals in the target signal and control the time or frequency synchronization of the remote unit and the proximal unit through the near-end and far-end synchronization and communication signals.

[0011] Optionally, the proximal unit includes: a coupler, a synchronization communication module, an amplification module, a detection module, and a combiner. The coupler, the amplification module, and the combiner are connected in sequence. One end of the synchronization communication module is connected to the amplification module, and the other end of the synchronization communication module is connected to the combiner. The detection module is connected to the coupler. The coupler is used to transmit the mobile communication radio frequency signal to the detection module. The detection module is used to determine the original time signal of the mobile communication radio frequency signal according to the mobile communication radio frequency signal and transmit the original time signal to the synchronization communication module. The synchronization communication module is used to determine the near-end and far-end synchronization and communication signals according to the original time signal and transmit the near-end and far-end synchronization and communication signals to the combiner. The amplification module is used to amplify the mobile communication radio frequency signal and then transmit it to the combiner. The combiner is used to fuse the near-end and far-end synchronization and communication signals and the mobile communication radio frequency signal to obtain the target signal and output it.

[0012] Optionally, the synchronous communication module includes: a microprocessor and a synchronous control sub-module, where the microprocessor is connected to the synchronous control sub-module; the synchronous control sub-module is configured to provide a frequency synchronization signal and determine a time synchronization signal according to the original time signal; the microprocessor is configured to place the time synchronization signal at the start position and the end position of the downlink time slot, and place the frequency synchronization signal and the communication polling broadcast information between the proximal machine and the distal machine at the middle position of the current downlink time slot, to obtain the near-far end synchronization and communication signal, where the near-far end synchronization and communication signal is in the TDD operating mode; the operating mode of the mobile communication radio frequency signal is also in the TDD operating mode, and the time widths of the uplink and downlink time slots of the near-far end synchronization and communication signal and the mobile communication radio frequency signal are the same.

[0013] According to another aspect of the embodiments of the present application, there is also provided a signal transmission method for a radio frequency active distribution system, including: obtaining a target signal through a proximal machine, where the target signal includes: a mobile communication radio frequency signal and a near-far end synchronization and communication signal; amplifying the target signal through a common branch in the distal machine to obtain an amplified target signal; outputting the amplified mobile communication radio frequency signal in the amplified target signal through a coverage branch in the distal machine; transmitting the amplified target signal to a next-level device through a cascade branch in the distal machine, and the common branch is a branch shared by the coverage branch and the cascade branch.

[0014] According to another aspect of the embodiments of the present application, there is also provided a communication device, including: a memory and a processor, where the processor is configured to run a program stored in the memory, and when the program runs, it executes the above-mentioned signal transmission method for a radio frequency active distribution system.

[0015] According to another aspect of the embodiments of the present application, there is also provided a non-volatile storage medium, where the non-volatile storage medium includes a stored program, and when the program runs, it controls the device where the non-volatile storage medium is located to execute the above-mentioned signal transmission method for a radio frequency active distribution system.

[0016] In the embodiments of the present application, a proximal unit and at least one distal unit are adopted, and the proximal unit is connected to the at least one distal unit; the proximal unit is configured to send a target signal to the at least one distal unit, and the target signal includes: a mobile communication radio frequency signal and a near - far end synchronization and communication signal between the proximal unit and the distal unit; the distal unit includes: a common branch, a coverage branch, and a cascaded branch. The common branch is configured to amplify the target signal to obtain an amplified target signal. The coverage branch is configured to output the amplified mobile communication radio frequency signal in the amplified target signal. The cascaded branch is configured to transmit the amplified target signal to the next - level device. The system where the common branch is a branch shared by the coverage branch and the cascaded branch achieves the purpose of second - stage signal gain by partially sharing the coverage branch and the cascaded branch, thereby realizing the technical effect of reducing the power of the cascaded branch and increasing the remote transmission distance of the distal unit, and further solving the technical problem of limited remote transmission distance of the distal unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0018] Figure 1 is a schematic structural diagram of a radio frequency active distribution system in the related art;

[0019] Figure 2 is a schematic structural diagram of a proximal unit in the related art;

[0020] Figure 3 is a schematic structural diagram of a distal unit in the related art;

[0021] Figure 4 is a schematic structural diagram of a radio frequency active distribution system according to an embodiment of the present application;

[0022] Figure 5 is a schematic structural diagram of a distal unit according to an embodiment of the present application;

[0023] Figure 6 is a schematic structural diagram of a proximal unit according to an embodiment of the present application;

[0024] Figure 7 is a schematic diagram of the fusion transmission format of the near - far end synchronization and communication signal between the proximal unit and the distal unit according to an embodiment of the present application;

[0025] Figure 8 is a hardware structural block diagram of a computer terminal (or mobile device) for a signal transmission method for a radio frequency active distribution system according to an embodiment of the present application;

[0026] Figure 9It is a schematic flowchart of a signal transmission method for a radio frequency active distribution system according to an embodiment of the present application. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] Figure 4 It is a schematic structural diagram of a radio frequency active distribution system according to an embodiment of the present application, as Figure 4 shown. The system includes:

[0030] A proximal unit 10 and at least one distal unit 20, and the proximal unit 10 is connected to the at least one distal unit 20;

[0031] The proximal unit 10 is configured to send a target signal to the at least one distal unit 20, and the target signal includes: a mobile communication radio frequency signal and a near-far end synchronization and communication signal between the proximal unit 10 and the distal unit 20;

[0032] The distal unit 20 includes: a common branch 201, a coverage branch 202, and a cascade branch 203. The common branch 201 is configured to amplify the target signal to obtain an amplified target signal. The coverage branch 202 is configured to output the amplified mobile communication radio frequency signal in the amplified target signal. The cascade branch 203 is configured to transmit the amplified target signal to the next-level device. The common branch 201 is a common branch for the coverage branch 202 and the cascade branch 203.

[0033] Through the above system, by sharing a part of the coverage branch 202 and the cascaded branch 203, the purpose of secondary signal gain is achieved, thereby achieving the technical effects of reducing the power of the cascaded branch and increasing the remote transmission distance of the remote unit, and further solving the technical problem of self-excitation phenomenon caused by the long-distance signal transmission of the remote unit.

[0034] It should be noted that sharing a part of the coverage branch 202 and the cascaded branch 203 reduces the power consumption of the cascaded branch 203, enabling multi-stage cascading and long-distance extension; at the same time, the partial separation of the coverage branch and the cascaded branch can achieve different gains and output powers for each branch, and the uplink noise can be adjusted to the optimal value when the remote units are cascaded.

[0035] As Figure 5 shown, the shared branch 201 includes: a first switch 2011, a first amplifier 2012, and a second amplifier 2013. The first switch 2011 is respectively connected to the first amplifier 2012 and the second amplifier 2013; the first switch 2011 is used to control the first amplifier 2012 to amplify the target signal during the downlink of the target signal; the second amplifier 2013 is used to amplify the target signal during the uplink of the target signal.

[0036] As Figure 5 shown, a digital attenuator 2014 is further included between the first switch 2011 and the first amplifier 2012, which is used to adjust the gain of the target signal during the downlink of the target signal; a digital attenuator 2014 is also included between the first switch 2011 and the second amplifier 2013, which is used to adjust the gain of the target signal during the uplink of the target signal.

[0037] It can be understood that Figure 5 the shown shared branch is only an example of the shared branch, and in other examples, the shared branch may also include other auxiliary circuits.

[0038] As Figure 5 shown, the remote unit 20 further includes: a power distribution module 204; the power distribution module 204 includes: a first power distributor 2041 and a second power distributor 2042. One end of the first power distributor 2041 is connected to the first amplifier 2012, the other end of the second power distributor 2042 is connected to the coverage branch 202, one end of the second power distributor 2042 is connected to the second amplifier 2013, and the other end of the second power distributor 2042 is connected to the coverage branch 202; the first power distributor 2041 is used to transmit the amplified target signal to the coverage branch 202 and the cascaded branch 203 respectively; the second power distributor 2042 is used to transmit the target signal to the shared branch 201 during the uplink of the target signal.

[0039] AsFigure 5 As shown, the covering branch 202 includes: a third amplifier 2021, a fourth amplifier 2022, a second switch 2023, and a first filter 2024. One end of the third amplifier 2021 is connected to the common branch 201, and the other end of the third amplifier 2021 is connected to the second switch 2023. One end of the fourth amplifier 2022 is connected to the common branch 201, and the other end of the fourth amplifier 2022 is connected to the second switch 2023. The first filter 2024 is connected to the second switch 2023. The second switch 2023 is used to control the fourth amplifier 2022 to amplify the target signal during the upward process of the target signal. The third amplifier 2021 is used to amplify the target signal during the downward process of the target signal. The first filter 2024 is used to filter out the amplified near-end and far-end synchronization and communication signals in the amplified target signal to output the amplified mobile communication radio frequency signal.

[0040] The cascaded branch 203 includes: a fifth amplifier 2031, a sixth amplifier 2032, and a third switch 2033. One end of the fifth amplifier 2031 is connected to the first power divider 2041, and the other end of the fifth amplifier 2031 is connected to the third switch 2033. One end of the sixth amplifier 2032 is connected to the second power divider 2042, and the other end of the sixth amplifier 2032 is connected to the third switch 2033. The third switch 2033 is used to control the sixth amplifier 2032 to amplify the target signal during the upward process of the target signal. The fifth amplifier 2031 is used to amplify the target signal during the downward process of the target signal.

[0041] The remote unit 20 further includes: a third power divider 205, a second filter 206, a radio frequency demodulator 207, and a synchronization processing chip 208. Among them, the third power divider 205 is respectively connected to the first switch 2011 and the second filter 206. The second filter 206, the radio frequency demodulator 207, and the synchronization processing chip 208 are connected in sequence. The synchronization processing chip 207 is also connected to the first switch 2011, the second switch 2023, and the third switch 2033. The third power divider 205 is used to transmit the target signal to the common branch and the second filter 206 respectively. The second filter 206 is used to filter the target signal and then transmit the target signal to the radio frequency demodulator 207. The radio frequency demodulator 207 is used to convert the target signal into a digital signal and send the converted target signal to the synchronization processing chip 208. The synchronization processing chip 207 is used to extract the near-end and far-end synchronization and communication signals in the target signal and control the frequency synchronization of the remote unit 20 and the proximal unit 10 through the near-end and far-end synchronization and communication signals.

[0042] It should be noted that the remote machine 20 also includes a microprocessor 2031 which is mainly responsible for monitoring the remote machine 10 and managing the communication between the near and remote machines.

[0043] As Figure 6 shown, the proximal machine 10 includes: a third filter 101, a coupler 102, a synchronous communication module 103, an amplification module 104, a detection module 105, and a combiner 106. The third filter 101, the coupler 102, the amplification module 104, and the combiner 106 are connected in sequence. One end of the synchronous communication module 103 is connected to the amplification module 104, and the other end of the synchronous communication module 103 is connected to the combiner 106. The detection module 105 is connected to the coupler 102. The third filter 101 is used for out-of-band filtering of the mobile communication radio frequency signal. The coupler 102 is used for transmitting the mobile communication radio frequency signal into the detection module 105. The detection module 105 is used for determining the original time signal of the mobile communication radio frequency signal according to the mobile communication radio frequency signal and transmitting the original time signal into the synchronous communication module 103. The synchronous communication module 103 is used for determining the near and far end synchronization and communication signal according to the original time signal and transmitting the near and far end synchronization and communication signal into the combiner 106. The amplification module 104 is used for amplifying the mobile communication radio frequency signal and then transmitting it into the combiner 106. The combiner 106 is used for fusing the near and far end synchronization and communication signal and the mobile communication radio frequency signal to obtain a target signal and outputting it.

[0044] The synchronous communication module 103 includes: a microprocessor 1031 and a synchronous control sub-module 1032. The microprocessor 1031 is connected to the synchronous control sub-module 1032. The synchronous control sub-module 1032 is used for providing a frequency synchronization signal and determining a time synchronization signal according to the original time signal. The microprocessor 1031 is used for placing the time synchronization signal at the start position and the end position of the downlink time slot, and placing the frequency synchronization signal and the communication polling broadcast information between the proximal machine 10 and the remote machine 20 at the middle position of the current downlink time slot to obtain the near and far end synchronization and communication signal. Among them, the near and far end synchronization and communication signal is in the TDD working mode. The working mode of the mobile communication radio frequency signal is also in the TDD working mode. The time widths of the uplink and downlink time slots of the near and far end synchronization and communication signal and the mobile communication radio frequency signal are the same.

[0045] Figure 7 shows a fusion transmission format of the near and far end synchronization and communication signal between the proximal machine and the remote machine.

[0046] Based on the above system, the present application also provides an embodiment of a signal transmission method for a radio frequency active distribution system. It should be noted that the steps shown in the flowchart of the accompanying drawings can also be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0047] The method embodiment provided by the embodiments of the present application can also be executed on a mobile terminal, a computer terminal or a similar computing device. Figure 8 The following shows a hardware structure block diagram of a computer terminal (or mobile device) for implementing the signal transmission method of the radio frequency active distribution system. As Figure 8 shown, the computer terminal 80 (or mobile device 80) may include one or more (shown as 802a, 802b,..., 802n in the figure) processors 802 (the processor 802 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 804 for storing data, and a transmission module 806 for communication functions. In addition, it may further include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a power supply, and / or a camera. Those of ordinary skill in the art can understand that Figure 8 the structure shown is only schematic and does not limit the structure of the above-mentioned electronic device. For example, the computer terminal 80 may further include more or fewer components than Figure 8 shown, or have a different configuration from Figure 8 shown.

[0048] It should be noted that the above one or more processors 802 and / or other data processing circuits are generally referred to as "data processing circuits" in this article. The data processing circuit can be embodied in whole or in part as software, hardware, firmware, or any combination thereof. In addition, the data processing circuit can be a single independent processing module, or be incorporated in whole or in part into any one of the other elements in the computer terminal 80 (or mobile device). As involved in the embodiments of the present application, the data processing circuit is used for a processor control (such as the selection of a variable resistance terminal path connected to an interface).

[0049] The memory 804 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the signal transmission method of the radio frequency active distribution system in the embodiments of the present application. The processor 802 executes various functional applications and data processing by running the software programs and modules stored in the memory 804, that is, implements the signal transmission method of the radio frequency active distribution system described above. The memory 804 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some instances, the memory 804 may further include a memory remotely disposed relative to the processor 802, and these remote memories may be connected to the computer terminal 80 through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0050] The transmission module 806 is used to receive or send data via a network. Specific examples of the above network may include a wireless network provided by a communication provider of the computer terminal 80. In one instance, the transmission module 806 includes a network adapter (Network Interface Controller, NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one instance, the transmission module 906 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0051] The display can be, for example, a touch-screen liquid crystal display (LCD), which enables a user to interact with the user interface of the computer terminal 80 (or mobile device).

[0052] According to an embodiment of the present application, an embodiment of a signal transmission method for a radio frequency active distribution system is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0053] The present application also provides a signal transmission method for a radio frequency active distribution system, as Figure 9 shown, including:

[0054] Step S902, obtaining a target signal through a proximal unit, where the target signal includes: a mobile communication radio frequency signal and a near-far end near-far end synchronization and communication signal;

[0055] Step S904: Amplify the target signal through the common branch in the remote unit to obtain the amplified target signal; output the amplified mobile communication radio frequency signal in the amplified target signal through the coverage branch in the remote unit.

[0056] Step S906: Transmit the amplified target signal to the next-level device through the cascaded branch in the remote unit. The common branch is the branch shared by the coverage branch and the cascaded branch.

[0057] In an optional manner, the radio frequency active distribution system includes two network elements, namely a proximal unit and a remote unit. The network elements are connected through radio frequency coaxial cables, network cables or optical fibers, and the remote unit supports chain-type cascading. The radio frequency active distribution system supports mobile communication signals in the TDD mode.

[0058] The proximal unit of the radio frequency active distribution system is used for processing and synchronous detection of mobile communication radio frequency signals in the TDD mode, near-end and far-end communication control and management, near-end and far-end synchronization between the proximal unit and the remote unit, and radio frequency modulation of communication signals. As Figure 6 shown, the proximal unit 10 internally couples the mobile communication signal in the TDD mode and obtains the TDD control signal through the detection module 105. The microprocessor 1031 is mainly responsible for the monitoring of the proximal unit 10 and the communication management between the near-end and far-end units. The time synchronization signal and the frequency synchronization signal adopt a custom communication frequency point, the same TDD mode and the uplink and downlink time ratio as the mobile communication signal. The synchronization information and the broadcast polling information are transmitted from the proximal unit to the remote unit in the downlink time slot, and the communication response information is transmitted from the remote unit 20 to the proximal unit 10 in the uplink time slot.

[0059] The proximal unit 10 transmits the mobile communication radio frequency signal, the near-end and far-end synchronization and the communication signal between the proximal unit and the remote unit to the remote unit 20 through a radio frequency coaxial cable or an optical fiber.

[0060] The remote unit 20 of the radio frequency active distribution system is used for demodulating the synchronization signal provided by the proximal unit 10, communicating between the near-end and far-end, amplifying and covering the mobile communication radio frequency signal, and amplifying and cascading the target signal. As Figure 5As shown in the figure. The remote unit 20 first distributes or couples the target signal transmitted by the proximal unit 10 through the uplink interface. One of the signals is subjected to radio frequency modulation and demodulation after filtering, and finally TDD synchronization demodulation and near-far end communication management are performed; the other signal is first amplified and gain-controlled for up and down links through the common branch 10. After the common branch 10, it is divided into a coverage branch 20 and a cascaded branch 30, and the coverage branch 20 and the cascaded branch 30 are independently amplified. The common branch 10 and the cascaded branch 20 adopt broadband design to amplify the target signal. The coverage branch 20 adds a band-pass filter at the radio frequency input / output port near the antenna to filter out near-far end synchronization and communication signals and out-of-band spurious / blocking signals. The microprocessor 1031 in the remote unit is mainly responsible for remote unit monitoring and communication management between the near and far end units.

[0061] According to another aspect of the embodiments of the present application, a computer device is further provided, including a memory, a processor, and a signal transmission method program of a radio frequency active distribution system stored on the memory and executable on the processor. When the processor executes the program, the signal transmission method of the radio frequency active distribution system as described above is implemented.

[0062] When the above computer device executes the program stored in the memory, through partial sharing of the coverage branch and the cascaded branch, the purpose of secondary gain of the signal is achieved, thereby realizing the technical effects of improving the remote transmission distance of the remote unit and reducing the power of the cascaded branch, and further solving the technical problem of limited remote transmission distance of the remote unit.

[0063] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0064] In the above embodiments of the present application, the descriptions of each embodiment have their own focuses. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0065] In several embodiments provided by the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0066] The unit described as a separation component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or may be distributed over multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0067] In addition, each functional unit in various embodiments of the present application may be integrated in a processing unit, may also be physically present separately for each unit, or two or more units may be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0068] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present application. The aforementioned storage medium includes: USB flash drives, read-only memory (ROM), random access memory (RAM), mobile hard disks, magnetic disks, or optical discs and other various media that can store program codes.

[0069] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A radio frequency active distribution system, characterized in that, Comprising: A proximal unit and at least one distal unit, the proximal unit being connected to the at least one distal unit; The proximal unit is configured to send a target signal to the at least one distal unit, the target signal including: a mobile communication radio frequency signal and a near - far end synchronization and communication signal between the proximal unit and the distal unit; The distal unit includes: a common branch, a coverage branch, and a cascaded branch. The common branch is configured to amplify the target signal to obtain an amplified target signal. The coverage branch is configured to output the amplified mobile communication radio frequency signal in the amplified target signal. The cascaded branch is configured to transmit the amplified target signal to the next - level device. The common branch is a branch shared by the coverage branch and the cascaded branch.

2. The system according to claim 1, wherein The common branch includes: A first switch, a first amplifier, and a second amplifier, the first switch being connected to the first amplifier and the second amplifier respectively; The first switch is configured to control the first amplifier to amplify the target signal during the downlink process of the target signal; The second amplifier is configured to amplify the target signal during the uplink process of the target signal.

3. The system according to claim 2, wherein The distal unit further includes: a power distribution module; The power distribution module includes: a first power divider and a second power divider. One end of the first power divider is connected to the first amplifier, the other end of the first power divider is connected to the coverage branch. One end of the second power divider is connected to the second amplifier, and the other end of the second power divider is connected to the coverage branch; The first power divider is configured to transmit the amplified target signal to the coverage branch and the cascaded branch respectively; The second power divider is configured to transmit the target signal to the common branch during the uplink process of the target signal.

4. The system according to claim 1, wherein The coverage branch includes: A third amplifier, a fourth amplifier, a second switch, and a first filter. One end of the third amplifier is connected to the common branch, the other end of the third amplifier is connected to the second switch. One end of the fourth amplifier is connected to the common branch, the other end of the fourth amplifier is connected to the second switch. The first filter is connected to the second switch; The second switch is configured to control the fourth amplifier to amplify the target signal during the uplink process of the target signal; The third amplifier is configured to amplify the target signal during the downlink process of the target signal; The first filter is configured to filter out the amplified near - far end synchronization and communication signal in the amplified target signal to output the amplified mobile communication radio frequency signal.

5. The system according to claim 3, characterized in that, The cascaded branch includes: A fifth amplifier, a sixth amplifier, and a third switch. One end of the fifth amplifier is connected to the first power divider, the other end of the fifth amplifier is connected to the third switch. One end of the sixth amplifier is connected to the second power divider, and the other end of the sixth amplifier is connected to the third switch; The third switch is used to control the sixth amplifier to amplify the target signal during the uplink process of the target signal; The fifth amplifier is used to amplify the target signal during the downlink process of the target signal.

6. The system according to claim 2, wherein The remote unit further includes: a third power divider, a second filter, a radio frequency demodulator, and a synchronization processing chip, wherein the third power divider is respectively connected to the first switch and the second filter, the second filter, the radio frequency demodulator, and the synchronization processing chip are connected in sequence, and the synchronization processing chip is further connected to the first switch, the second switch, and the third switch; The third power divider is used to transmit the target signal to the common branch and the second filter respectively; The second filter is used to filter the target signal and then transmit the target signal to the radio frequency demodulator; The radio frequency demodulator is used to convert the target signal into a digital signal and send the converted target signal to the synchronization processing chip; The synchronization processing chip is used to extract the near-far end synchronization and communication signals in the target signal and control the time or frequency synchronization of the remote unit and the proximal unit through the near-far end synchronization and communication signals.

7. The system according to claim 1, wherein The proximal unit includes: a coupler, a synchronization communication module, an amplification module, a detection module, and a combiner. The coupler, the amplification module, and the combiner are connected in sequence. One end of the synchronization communication module is connected to the amplification module, the other end of the synchronization communication module is connected to the combiner, and the detection module is connected to the coupler; The coupler is used to transmit the mobile communication radio frequency signal to the detection module; The detection module is used to determine the original time signal of the mobile communication radio frequency signal according to the mobile communication radio frequency signal and transmit the original time signal to the synchronization communication module; The synchronization communication module is used to determine the near-far end synchronization and communication signals according to the original time signal and transmit the near-far end synchronization and communication signals to the combiner; The amplification module is used to amplify the mobile communication radio frequency signal and then transmit it to the combiner; The combiner is used to fuse the near-far end synchronization and communication signals and the mobile communication radio frequency signal to obtain the target signal and output it.

8. The system according to claim 7, characterized in that, The synchronization communication module includes: a microprocessor and a synchronization control sub-module, and the microprocessor is connected to the synchronization control sub-module; The synchronization control sub-module is used to provide a frequency synchronization signal and determine a time synchronization signal according to the original time signal; The microprocessor is configured to place the time synchronization signal at the start position and the end position of the downlink time slot, and place the frequency synchronization signal and the communication polling broadcast information between the proximal machine and the distal machine at the middle position of the current downlink time slot, so as to obtain the near-far end synchronization and communication signal, wherein the near-far end synchronization and communication signal is in the TDD working mode; the working mode of the mobile communication radio frequency signal is also in the TDD working mode, and the time widths of the uplink and downlink time slots of the near-far end synchronization and communication signal and the mobile communication radio frequency signal are the same.

9. A signal transmission method for a radio frequency active distribution system, characterized in that Comprising: Obtaining a target signal through a proximal machine, wherein the target signal includes: a mobile communication radio frequency signal and a near-far end synchronization and communication signal; Amplifying the target signal through a common branch in the distal machine to obtain an amplified target signal; outputting the amplified mobile communication radio frequency signal in the amplified target signal through the coverage branch in the distal machine; Transmitting the amplified target signal to a next-level device through a cascade branch in the distal machine, and the common branch is a branch shared by the coverage branch and the cascade branch.

10. A communication device, characterized in that, Comprising: A memory and a processor, the processor is configured to run a program stored in the memory, wherein when the program runs, it executes the signal transmission method of the radio frequency active distribution system described in claim 9.

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