PRRU circuit and digital indoor distribution system

Abstract

The utility model provides a pRRU circuit and a digital indoor distribution system, and relates to the technical field of communication, the pRRU circuit comprises a processor, at least one radio frequency transceiver and at least one radio frequency circuit; the processor is electrically connected with each radio frequency transceiver, and each radio frequency transceiver is also electrically connected with one corresponding radio frequency circuit; the processor is further electrically connected with at least one optical port and various external power supply interfaces. The various external power supply interfaces comprise at least two of an RJ45 interface, a USB TYPE-C interface, a USB TYPE-A interface, a PH2.0 interface and an RJ11 interface. According to the technical scheme provided by the utility model, the far-end unit provides output voltages of various interface types and differentiated data transmission modes at the same time, so that compatibility of power supply to positioning equipment such as Bluetooth beacons or UWB base stations of different manufacturers is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially relates to a kind of pRRU circuit and a kind of digital room distribution system. BACKGROUND

[0002] Digital room distribution system (also can be called digital micro distribution system) using access unit, extension unit and remote unit three-level architecture can be connected with edge computing server networking, realize indoor positioning based on Bluetooth or UWB (Ultra Wide Band, super bandwidth) by deploying positioning engine on edge computing server.

[0003] At present, some Bluetooth beacon devices supporting non-battery power supply appear on the market, which are used to solve the problems of short service life of battery power supply, difficulty in replacing battery, limitation of battery power supply on Bluetooth chip selection, etc. These Bluetooth beacon devices supporting non-battery power supply are designed with different power supply voltages, such as standard POE (Power over Ethernet, Power over Ethernet), 24V, 12V, 3.5V, etc., to adapt to different application scenario requirements (such as application of digital room distribution, to realize low-power, small-size 5G+ Bluetooth positioning system, etc.), and are connected and networked with remote units using fixed interfaces, which lacks compatibility in power supply and data transmission. UTILITY MODEL CONTENT

[0004] In order to at least partially solve the technical problem of poor compatibility of the remote unit of the digital room distribution system in the prior art with the Bluetooth beacon device supporting non-battery power supply, the utility model is completed.

[0005] According to one aspect of the utility model, a pRRU circuit is provided, comprising: a processor, at least one radio frequency transceiver and at least one radio frequency circuit; the processor is electrically connected with each radio frequency transceiver respectively, and each radio frequency transceiver is also electrically connected with a corresponding radio frequency circuit; the processor is also electrically connected with at least one optical port and a plurality of external power supply interfaces respectively, and the plurality of external power supply interfaces include at least two of RJ45 interface, USB TYPE-C interface, USB TYPE-A interface, PH2.0 interface and RJ11 interface.

[0006] Optionally, the processor includes a master control chip and an FPGA; the master control chip is electrically connected with the FPGA, the FPGA is electrically connected with each radio frequency transceiver respectively, and the FPGA is also electrically connected with the at least one optical port and the plurality of external power supply interfaces respectively.

[0007] Optionally, the plurality of external power supply interfaces includes at least one RJ45 interface; the RJ45 interface is electrically connected with a PSE chip, the PSE chip is further electrically connected with a power input interface; the RJ45 interface is further electrically connected with an Ethernet controller, and the Ethernet controller is electrically connected with the FPGA.

[0008] Optionally, the plurality of external power supply interfaces includes at least one USB TYPE-C interface; the USB TYPE-C interface is electrically connected with a first USB controller, the first USB controller is further electrically connected with the FPGA; the USB TYPE-C interface is further electrically connected with a first current limiting IC, the first current limiting IC is further electrically connected with a first voltage reducing power supply, and the first voltage reducing power supply is further electrically connected with the power input interface and the FPGA respectively; the master control chip is used to generate a first switch control signal when no external device is connected to the USB TYPE-C interface, and the FPGA is used to control the first voltage reducing power supply to stop working according to the first switch control signal.

[0009] Optionally, the plurality of external power supply interfaces includes at least one USB TYPE-A interface; the USB TYPE-A interface is electrically connected with a second USB controller, the second USB controller is further electrically connected with the FPGA; the USB TYPE-A is further electrically connected with a second current limiting IC, the second current limiting IC is further electrically connected with a second voltage reducing power supply, and the second voltage reducing power supply is further electrically connected with the power input interface and the FPGA respectively; the master control chip is used to generate a second switch control signal when no external device is connected to the USB TYPE-A, and the FPGA is used to control the second voltage reducing power supply to stop working according to the second switch control signal.

[0010] Optionally, the plurality of external power supply interfaces includes at least one PH2.0 interface; the PH2.0 interface is electrically connected with a third voltage reducing power supply, and the third voltage reducing power supply is further electrically connected with the power input interface and the FPGA respectively; the master control chip is used to generate a third switch control signal when no external device is connected to the PH2.0 interface, and the FPGA is used to control the third voltage reducing power supply to stop working according to the third switch control signal.

[0011] Optionally, the plurality of external power supply interfaces includes at least one RJ11 interface; the RJ11 interface is electrically connected with a RS485 chip, and the RS485 chip is further electrically connected with the FPGA; the RJ11 interface is further electrically connected with a power switch, and the power switch is further electrically connected with the power input interface and the FPGA respectively.

[0012] Optionally, the pRRU circuit further includes a storage chip; the storage chip is electrically connected with the master control chip.

[0013] Optionally, the pRRU circuit further comprises: a clock module; the clock module is electrically connected with the master chip, the FPGA and each radio frequency transceiver respectively.

[0014] According to another aspect of the utility model, a kind of digital room distribution system is provided, comprising: baseband processing unit, expansion unit and at least one preceding pRRU circuit;The baseband processing unit is electrically connected with the expansion unit, and the expansion unit is electrically connected with each pRRU circuit respectively.

[0015] The technical scheme provided by the utility model can include the following beneficial effects:

[0016] The pRRU circuit and the digital room distribution system provide output voltage and differential data transmission mode of multiple interface types such as RJ45 interface, USB TYPE-C interface, USB TYPE-A interface, PH2.0 interface and RJ11 interface in remote unit, to realize the compatibility of power supply for positioning equipment such as Bluetooth beacon or UWB base station of different manufacturers.

[0017] Other features and advantages of the utility model will be described in the subsequent specification, and part becomes obvious from the specification, or is understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structure specially pointed out in the specification, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings are used to provide further understanding of the technical scheme of the utility model, and constitute part of the specification, and are used to explain the technical scheme of the utility model together with the embodiments of the utility model, and do not constitute the limitation to the technical scheme of the utility model.

[0019] Figure 1 A structure schematic view of the pRRU circuit provided for the embodiments of the utility model is shown in the figure;

[0020] Figure 2 Another structure schematic view of the pRRU circuit provided for the embodiments of the utility model is shown in the figure;

[0021] Figure 3 A structure schematic view of the digital room distribution system provided for the embodiments of the utility model is shown in the figure;

[0022] Figure 4 An application case of the digital room distribution system provided for the embodiments of the utility model is shown in the figure;

[0023] Figure 5 Another application case of the digital room distribution system provided for the embodiments of the utility model is shown in the figure.

[0024] In the figure: 100-pRRU circuit; 101-FPGA; 1011-optical port; 1012-power input interface; 1013-RJ45 interface; 10131-PSE chip; 10132-Ethernet controller;

[0025] 1014-PH2.0 interface; 10141-third step-down power supply; 1015-USB TYPE-C interface;

[0026] 10151-first step-down power supply; 10152-first current limiting IC; 10153-first USB controller;

[0027] 1016-USB TYPE-A interface; 10161-second step-down power supply; 10162-second current limiting IC;

[0028] 10163-second USB controller; 1017-RJ11 interface; 10171-power switch; 10172- RS485 chip; 102-main control chip; 103-first radio frequency transceiver; 104-first radio frequency circuit; 105-second radio frequency transceiver; 106-second radio frequency circuit; 107-storage chip; 108-clock module; 200-expansion unit; 300-baseband processing unit; 401-Bluetooth beacon; 402-Bluetooth tag; 403-UWB base station. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model more clear, the specific embodiments of the utility model are described in detail below with reference to the drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0030] It should be noted that the orientation or position relationship indicated by various orientation terms is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. in the specification and claims of the utility model are used to distinguish similar objects, and do not necessarily describe a specific order or sequence; and in the case of no conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other at will. It should be understood that when a certain element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or there can be intermediate elements.

[0031] At present, when the remote unit of the digital room subsystem is in communication with the Bluetooth beacon device supporting non-battery power supply, the following disadvantages exist:

[0032] 1. Insufficient power supply compatibility.

[0033] The existing digital room distribution system mainly uses the POE of the remote unit to supply power to the Bluetooth beacon. For Bluetooth beacons that do not support POE power supply, it will not be able to supply power to them. In addition, there are various models and corresponding voltage standard interfaces for Bluetooth beacons, such as 24V, 12V, 3.5V, etc. The data transmission requirements between different Bluetooth beacons and remote units are also different. If the remote unit only has one interface for power supply and data transmission, it lacks compatibility and cannot meet the power supply and data transmission requirements of Bluetooth beacons of different manufacturers and models.

[0034] 2. Difficult to meet differentiated backhaul requirements.

[0035] The existing digital room distribution system first uses the POE power supply network port of the pRRU (Passive Remote Radio Unit) to supply power, and then uses the expansion unit and BBU (Building Base band Unite) to backhaul the positioning data of the Bluetooth beacon device. However, in actual applications, there are scenarios that require pRRU to backhaul Bluetooth positioning information and scenarios that do not require pRRU to backhaul Bluetooth positioning information, such as scenarios that use a mobile phone to receive Bluetooth beacon signals for positioning. The mobile phone can directly backhaul data to the positioning engine or even the mobile phone itself for positioning processing through the wireless air interface. However, for scenarios such as hanging Bluetooth devices or WBW positioning information (WBW positioning refers to a method of positioning target objects when using a convolutional neural network for target detection), it is necessary to backhaul through the POE power supply network port provided by the pRRU. Therefore, the existing digital room distribution system remote unit (pRRU) cannot meet the differentiated backhaul requirements.

[0036] 3. Low line reliability.

[0037] The existing digital room distribution system does not consider the networking method for the remote unit to supply power to the Bluetooth beacon. If the remote unit and the Bluetooth beacon are connected in the conventional series connection scheme, a power supply line failure of one of the Bluetooth beacons, or interface loosening caused by improper operation during engineering implementation, can easily cause power supply problems for all Bluetooth beacons connected downstream.

[0038] To solve the above problems, the present utility model combines the application scenarios of 4G / 5G digital room distribution systems and Bluetooth beacon and other indoor positioning devices, and proposes a pRRU circuit that integrates multiple interfaces to address the problems of insufficient POE power supply compatibility, difficulty in meeting differentiated backhaul requirements, and low line reliability of Bluetooth beacons and UWB base stations and other positioning devices. The following specific embodiments will be described in detail.

[0039] Figure 1 A structure diagram of a pRRU circuit is provided for the embodiments of the utility model. As shown in the figure, Figure 1 The pRRU circuit 100 comprises a processor, at least one radio frequency transceiver and at least one radio frequency circuit; the processor is electrically connected with each radio frequency transceiver respectively, and each radio frequency transceiver is also electrically connected with a corresponding radio frequency circuit; the processor is also electrically connected with at least one optical port and a plurality of external power supply interfaces, and the plurality of external power supply interfaces comprise at least two of an RJ45 interface, a USB TYPE-C interface, a USB TYPE-A interface, a PH2.0 interface and an RJ11 interface.

[0040] The RJ45 interface is an 8-pin information socket connector, mainly used for Ethernet, commonly used for connecting various network devices such as computers, routers, switches, etc. The RJ45 interface can be electrically connected with a Bluetooth tag or a UWB base station.

[0041] The USB TYPE-A interface is also called USB-A interface, which supports multiple standards such as USB 2.0 and USB 3.0, and its maximum theoretical transmission rate is 480Mbps and 5Gbps respectively.

[0042] The USB Type-C interface has a smaller size than Type-A and Type-B, supports higher transmission rate, and can reach up to 10Gbps; supports power transmission up to 100W, suitable for fast charging and high-power devices.

[0043] The PH2.0 interface is a kind of micro connector interface, commonly used for data transmission or power supply between various electronic devices. The diameter of the PH2.0 interface is 2.0mm, usually in straight and bent forms, with a pin spacing of 2.54mm, which can be matched with the corresponding socket. The PH2.0 interface can be electrically connected with a Bluetooth beacon.

[0044] The RJ11 interface is a 6-pin telephone connector, mainly used in telephone communication equipment. The RJ11 interface usually refers to a 6-position (6-pin) modular jack or plug, widely used in telephone line connection.

[0045] In the pRRU circuit, the radio frequency transceiver is mainly responsible for signal reception and transmission. Specifically, signal reception: the antenna captures radio waves, the tuner isolates the desired frequency of the wave, and the detector or demodulator extracts information from the wave. Signal transmission: the circuit of the transceiver generates a constantly changing current, and after the current is modulated, it is transmitted through the antenna as a radio wave for transmission.

[0046] The radio frequency circuit is mainly responsible for signal processing and power amplification. Specifically, signal processing: the radio frequency circuit is responsible for processing the received radio wave signal and converting it into a baseband signal for further processing, while the radio frequency circuit also modulates the baseband signal into a radio frequency signal for transmission. Power amplification: the power amplifier (PA) in the radio frequency circuit is responsible for amplifying the signal to ensure that the signal can propagate a sufficient distance. Ideally, the power amplifier should remain linear to reduce spectral expansion and improve efficiency. Pre-distortion technology: through digital pre-distortion (DPD) technology, the radio frequency circuit can linearize the nonlinear characteristics of the power amplifier, reduce distortion, and improve signal quality.

[0047] The processor is electrically connected to the extension unit through at least one optical port, and the extension unit is also electrically connected to the baseband processing unit. The processor is configured to interact with the baseband processing unit through the at least one optical port and the extension unit, and is also configured to receive data from each external power supply interface and send corresponding control signals to each external power supply interface.

[0048] In this embodiment, by providing output voltages and differential data transmission methods of multiple interface types such as RJ45 interface, USB TYPE-C interface, USB TYPE-A interface, PH2.0 interface and RJ11 interface in the remote unit, the compatibility of power supply for positioning devices such as Bluetooth beacons or UWB base stations of different manufacturers is realized.

[0049] In a specific embodiment, the processor includes a master control chip and an FPGA. The master control chip is electrically connected to the FPGA, and the FPGA is electrically connected to each radio frequency transceiver. The FPGA is also electrically connected to at least one optical port and a plurality of external power supply interfaces.

[0050] In this embodiment, the master control chip is configured to generate control signals, and the FPGA is configured to control the plurality of external power supply interfaces according to the control signals generated by the master control chip.

[0051] In a specific embodiment, the plurality of external power supply interfaces includes at least one RJ45 interface. The RJ45 interface is electrically connected to a PSE chip, and the PSE chip is also electrically connected to a power input interface. The RJ45 interface is also electrically connected to an Ethernet controller, and the Ethernet controller is electrically connected to the FPGA.

[0052] Among them, the PSE (Power Sourcing Equipment, Power Supply Equipment) chip is a key component in the POE power supply system, mainly responsible for providing power to the PD (Powered Device, Powered Device). The working principle of the PSE chip involves the detection stage and the power supply stage.

[0053] Detection phase: PSE chip sends a small voltage signal through the Ethernet port (such as RJ45 interface), detects whether there is a PD device that meets the POE standard, and the standard PD device has a 25k5 common mode resistance as a "detection feature" at its interface. When the PSE chip detects this specific resistance value, it can determine that there is a PD device connected. In addition, the PSE chip will continuously monitor the voltage, current and other parameters of the Ethernet port to ensure that the connection state is normal. If abnormal conditions are detected, such as short circuit or resistance value mismatch of the Ethernet port, the PSE chip will stop power supply operation to protect the safety of the entire POE system.

[0054] Power supply phase: After confirming the access of the PD device, the PSE chip will supply power according to the power demand of the device. POE system transmits data and power through the same Ethernet cable, simplifying wiring settings and reducing installation and maintenance costs of devices.

[0055] In this embodiment, the DC power provided by the power input interface is input to the PSE chip, and the output of the PSE chip can be coupled to the RJ45 interface through a transformer. The data channel of the RJ45 interface is connected to the FPGA through the Ethernet controller, and the PSE chip cooperates with the Ethernet controller and the FPGA to detect the characteristics of the device connected to the RJ45 interface and classify the current, and provide the required power for the device that meets the IEEE802.3 af / at protocol. In addition, the RJ45 interface is also a 10M / 100M base-T standard interface, which can use Ethernet twisted pair with POE devices such as Bluetooth beacons for 10M / 100Mbps data interaction.

[0056] In a specific embodiment, the plurality of external power supply interfaces includes at least one USB TYPE-C interface. The USB TYPE-C interface is electrically connected with the first USB controller, and the first USB controller is also electrically connected with the FPGA; the USB TYPE-C interface is also electrically connected with the first current limiting IC, and the first current limiting IC is also electrically connected with the first voltage reducing power supply, and the first voltage reducing power supply is also respectively electrically connected with the power input interface and the FPGA. The master control chip is used to generate a first switch control signal when there is no external device connected to the USB TYPE-C interface, and the FPGA is used to control the first voltage reducing power supply to stop working according to the first switch control signal.

[0057] Among them, the current limiting IC (Current Limiting Integrated Circuit) is a chip used to protect the circuit, and its main function is to limit the current in the circuit to prevent the circuit from being damaged by excessive current. The current limiting IC can automatically reduce the current when the current exceeds the set threshold value through the built-in transistor, diode and resistor, etc. elements, so as to protect the circuit board and other elements from damage caused by excessive current.

[0058] In this embodiment, the DC power provided by the power input interface is input to the USB TYPE-C interface after being stepped down by the first step-down power supply and limited by the first current-limiting IC. The data channel of the USB TYPE-C interface is connected to the FPGA through the first USB controller. The USB TYPE-C interface can be extended with various USB peripherals, such as a USB WIFI module, a USB memory, a USB Bluetooth module, etc.

[0059] The master control chip can control the FPGA to stop the first step-down power supply from working when there is no peripheral connected to the USB TYPE-C interface, so as to reduce unnecessary power consumption, lower the overall energy consumption, reduce the aging of the circuit and components, prolong the service life of the device, reduce the heat generation and temperature of the device, improve the stability and reliability of the device, avoid short circuit or other electrical faults of the USB TYPE-C interface caused by accidental contact, and reduce the risk.

[0060] In a specific embodiment, the plurality of external power supply interfaces includes at least one USB TYPE-A interface. The USB TYPE-A interface is electrically connected to the second USB controller, and the second USB controller is also electrically connected to the FPGA. The USB TYPE-A interface is also electrically connected to the second current-limiting IC, and the second current-limiting IC is also electrically connected to the second step-down power supply. The second step-down power supply is also electrically connected to the power input interface and the FPGA, respectively. The master control chip is configured to generate a second switch control signal when there is no peripheral connected to the USB TYPE-A interface, and the FPGA is configured to control the second step-down power supply to stop working according to the second switch control signal.

[0061] In this embodiment, the DC power provided by the power input interface is input to the USB TYPE-C interface after being stepped down by the first step-down power supply and limited by the first current-limiting IC. The data channel of the USB TYPE-C interface is connected to the FPGA through the first USB controller. The USB TYPE-C interface can be extended with various USB peripherals, such as a USB WIFI module, a USB memory, a USB Bluetooth module, etc.

[0062] The master control chip can control the FPGA to stop the first step-down power supply from working when there is no peripheral connected to the USB TYPE-C interface, so as to reduce unnecessary power consumption, lower the overall energy consumption, reduce the aging of the circuit and components, prolong the service life of the device, reduce the heat generation and temperature of the device, improve the stability and reliability of the device, avoid short circuit or other electrical faults of the USB TYPE-C interface caused by accidental contact, and reduce the risk.

[0063] In a specific embodiment, the plurality of external power supply interfaces includes at least one PH2.0 interface. The PH2.0 interface is electrically connected with a third voltage reducing power supply, and the third voltage reducing power supply is also electrically connected with the power input interface and the FPGA respectively. The master control chip is configured to generate a third switch control signal when the PH2.0 interface is not accessed by an external device, and the FPGA is configured to control the third voltage reducing power supply to stop working according to the third switch control signal.

[0064] In this embodiment, the DC power provided by the power input interface is input to the PH2.0 interface after being reduced by the third voltage reducing power supply.

[0065] The master control chip can control the FPGA to stop the third voltage reducing power supply from working when the PH2.0 interface is not accessed by an external device, so as to reduce unnecessary power consumption, reduce overall energy consumption, reduce aging of circuits and components, prolong the service life of the device, reduce the heat generation of the device, reduce the temperature, improve the stability and reliability of the device, avoid short circuit or other electrical faults of the PH2.0 interface caused by accidental contact, and reduce the risk.

[0066] In a specific embodiment, the plurality of external power supply interfaces includes at least one RJ11 interface. The RJ11 interface is electrically connected with an RS485 chip, and the RS485 chip is also electrically connected with the FPGA. The RJ11 interface is also electrically connected with a power switch, and the power switch is also electrically connected with the power input interface and the FPGA respectively.

[0067] The RS485 chip is a chip used to implement the RS-485 communication standard. RS-485 is a serial communication standard widely used in industrial automation and control systems, supporting multi-point differential signal transmission and being suitable for long-distance and high-speed data transmission.

[0068] In this embodiment, the UART interface of the FPGA is connected with the RS485 chip, and the data channel of the RJ11 interface is connected to the FPGA through the RS485 chip. Specifically, the RS485 chip converts the TX single-ended signal of the FPGA into a differential signal of RS485 level and sends it out through the RJ11 interface, and converts the differential signal of RS485 level received by the RJ11 interface into a single-ended RX signal and sends it to the FPGA, so as to realize communication between the external device connected with the RJ11 interface and realize maximum 10Mbps data transmission. The working mode of RS485 is half-duplex, the pRRU is the master device, the external device is the slave device, and the signal conversion direction of the RS485 chip is controlled by the FPGA.

[0069] A power switch is connected in series between the power input interface and the RJ11 interface, so that whether the RJ11 interface has voltage can be controlled.

[0070] In an embodiment, the pRRU circuit 100 further comprises a storage chip.

[0071] In this embodiment, the main function of the storage chip is to store configuration information, system parameters and user data, and other key information.

[0072] In an embodiment, the pRRU circuit 100 further comprises a clock module.

[0073] In this embodiment, the clock module provides clock signals for the main control chip, FPGA and each radio frequency transceiver.

[0074] Figure 2 Another structural diagram of a pRRU circuit is provided for the embodiment of the utility model. Figure 2 As shown in the figure, the pRRU circuit 100 comprises an FPGA 101, a main control chip 102, a first radio frequency transceiver 103, a first radio frequency circuit 104, a second radio frequency transceiver 105, a second radio frequency circuit 106, a storage chip 107, a clock module 108, a PSE chip 10131, an Ethernet controller 10132, a first step-down power supply 10151, a first current limiting IC 10152, a first USB controller 10153, a second step-down power supply 10161, a second current limiting IC 10162, a second USB controller 10163, a third step-down power supply 10141, a power switch 10171, an RS485 chip 10172, two optical ports 1011, a power input interface 1012 and a plurality of external power supply interfaces.

[0075] The pRRU external power supply interface includes an RJ45 interface 1013, two PH2.0 interfaces 1014, a USB TYPE-A interface 1016, a USB TYPE-C interface 1015, and an RJ11 interface 1017.

[0076] The storage chip 107 is electrically connected to the master control chip 102. The master control chip 102 is also electrically connected to the FPGA 101. The clock module 108 is electrically connected to the master control chip 102, the FPGA 101, the first radio frequency transceiver 103, and the second radio frequency transceiver 105, respectively. The FPGA 101 is also electrically connected to the first radio frequency transceiver 103 and the second radio frequency transceiver 105, respectively. The first radio frequency transceiver 103 is also electrically connected to the first radio frequency circuit 104. The second radio frequency transceiver 105 is also electrically connected to the second radio frequency circuit 104.

[0077] The pRRU whole machine input is direct current 48V. The 48V power supply is input to the PSE chip 10131. The output of the PSE chip 10131 is coupled to the RJ45 interface 1013 through a transformer. The PSE chip 10131 can perform feature detection and current classification on the device connected to the RJ45 interface 1013, and provide the required power for the device meeting the IEEE802.3 af / at protocol. This RJ45 interface 1013 is also a 10M / 100M base-T standard interface, which can use Ethernet twisted pair to perform 10M / 100Mbps data interaction with POE devices such as Bluetooth beacons.

[0078] The voltage of the PH2.0 interface 1014 is direct current 3.5V, which is converted by the direct current-direct current step-down power supply (third step-down power supply 10141) from the 48V input of the pRRU.

[0079] The voltage of the USB TYPE-C interface 1015 and the USB TYPE-A interface 1016 is the typical USB interface voltage 5V. The voltage of the two is converted by two direct current-direct current step-down power supplies (first step-down power supply 10151 and second step-down power supply 10161) from the 48V input of the pRRU, and respectively in series with a USB power current limiting chip (first current limiting IC 10152 and second current limiting IC 10162), which can limit the interface current of the two to 1A, providing protection for the step-down power supply. The data channel of the USB TYPE-C interface 1015 and the USB TYPE-A interface 1016 is connected to the FPGA 101 through two USB controllers (first USB controller 10153 and second USB controller 10163), respectively, to realize USB2.0 data transmission, which can provide a transmission bandwidth of 480Mbps at most. Various USB peripherals can be expanded, such as USB WIFI modules, USB flash memories, USB Bluetooth modules, etc.

[0080] The voltage of the RJ11 interface 1017 is 48V, and the source is the whole machine power input of the pRRU, and a power switch 10171 is connected in series in the middle, which can control the presence or absence of the 48V voltage of the RJ11 interface. The UART interface of the FPGA 101 is connected with the RS485 chip 10172, the RS485 chip 10172 converts the single-ended signal of the TX of the FPGA 101 into a differential signal of RS485 level and sends it out through the RJ11 interface 1017, and converts the differential signal of RS485 level received by the RJ11 interface 1017 into a single-ended RX signal and sends it to the FPGA 101, to realize communication with the RJ11 peripheral device, and to realize maximum 10Mbps data transmission. The working mode of the RS485 chip 10172 is half duplex, the pRRU is the master device, and the peripheral device is the slave device, and the signal conversion direction of the RS485 chip 10172 is controlled by the FPGA 101. When the RJ11 interface 1017 is not connected with the peripheral device, the FPGA 101 can turn off the power switch 10171, so as to avoid the power short circuit of the RJ11 interface 1017 caused by accidental touch, and cause harm to the device or the construction personnel.

[0081] The advantages of such a setting are: 1. When there is no external device, the whole machine power consumption of the pRRU can be reduced, unnecessary power consumption can be reduced, the overall energy consumption can be reduced, and the energy saving effect is remarkable especially when large-scale equipment is deployed; 2. When there is no external device, the power supply can be turned off to reduce the aging of the circuit and the components, thereby prolonging the service life of the device; 3. Turning off the power supply can reduce the heat dissipation of the device, reduce the temperature, and improve the stability and reliability of the device; 4. If the power supply interface of the device is accidentally contacted, it may cause short circuit or other electrical faults, and turning off the power supply can reduce the risk.

[0082] The voltage of the RJ11 interface 1017 is 48V, and the source is the whole machine power input of the pRRU, and a power switch 10171 is connected in series in the middle, which can control the presence or absence of the 48V voltage of the RJ11 interface. The UART interface of the FPGA 101 is connected with the RS485 chip 10172, the RS485 chip 10172 converts the single-ended signal of the TX of the FPGA 101 into a differential signal of RS485 level and sends it out through the RJ11 interface 1017, and converts the differential signal of RS485 level received by the RJ11 interface 1017 into a single-ended RX signal and sends it to the FPGA 101, to realize communication with the RJ11 peripheral device, and to realize maximum 10Mbps data transmission. The working mode of the RS485 chip 10172 is half duplex, the pRRU is the master device, and the peripheral device is the slave device, and the signal conversion direction of the RS485 chip 10172 is controlled by the FPGA 101. When the RJ11 interface 1017 is not connected with the peripheral device, the FPGA 101 can turn off the power switch 10171, so as to avoid the power short circuit of the RJ11 interface 1017 caused by accidental touch, and cause harm to the device or the construction personnel.

[0083] The pRRU circuit provided by the embodiment of the utility model has the following advantages:

[0084] 1. The interface has high integration and compatibility. The fusion of various forms and various interfaces on the pRRU can provide power supply for Bluetooth devices, UWB base stations or other peripheral devices of different manufacturers and different models, and the integration of the interface and the compatibility of the power supply greatly improve the scalability and deployment flexibility of the pRRU.

[0085] 2. Low-cost backhaul differentiation design. The RJ45 interface, the RJ11 interface, the USB TYPE-A interface, and the USB TYPE-C interface all have data backhaul channels. The design of multiple interface types can simultaneously support different Bluetooth or UWB positioning devices in different application scenarios and reduce the cost of the remote unit.

[0086] 3. Power supply switch controllable. The power supply of different interfaces can be controlled according to whether the external device is connected. The controllable power supply design can ensure the safety of the device and the engineer, reduce power consumption, be more energy-saving and environmentally friendly, and meet the development direction of the national green high-carbon economic society.

[0087] 4. Line reliability. Voltage conversion is performed inside the pRRU, two PH2.0 interfaces are provided, two voltages are respectively connected in series with low-power Bluetooth beacons, high-reliability backup of the power supply link is realized, and then other Bluetooth beacons are cascaded through the Bluetooth beacon to realize power supply for more Bluetooth beacons.

[0088] Figure 3 A structure diagram of the digital room distribution system is provided for the embodiments of the present application. As shown in the figure, Figure 3 The digital room distribution system includes a baseband processing unit 300, an expansion unit 200, and the pRRU circuit 100 described in the previous embodiment. The baseband processing unit 300 is electrically connected to the expansion unit 200, and the expansion unit 200 is electrically connected to each pRRU circuit 100. Since the baseband processing unit and the expansion unit are existing devices, their structures are also known structures, so the specific structures of the two are not described again.

[0089] Figure 4 An application case of the digital room distribution system is provided. The PH2.0 interface of the pRRU provides a voltage of 3.5V, connects a low-power Bluetooth beacon, and the double-PH2.0 interface design provides a high-reliability backup for the power supply link. The Bluetooth beacon connected to each PH2.0 interface can also cascade other Bluetooth beacons, for example, the Bluetooth beacon 11 connected to one PH2.0 interface can cascade the Bluetooth beacon 12, the Bluetooth beacon 13, …, the Bluetooth beacon 1n, and the Bluetooth beacon 21 connected to the other PH2.0 interface can cascade the Bluetooth beacon 22, the Bluetooth beacon 23, …, the Bluetooth beacon 2n, to realize Bluetooth beacon networking. The RJ45 interface of the pRRU connects a Bluetooth tag conforming to the IEEE802.3af / at protocol and transmits the positioning data of the Bluetooth tag to the positioning engine deployed by the system to provide accurate positioning for the distributed pRRU and provide convenience, reduce maintenance time and cost for the daily operation and maintenance of the pRRU.

[0090] Figure 5 Another application case of the digital distribution system is provided. In the application case, the PH2.0 interface of the pRRU provides a voltage of 3.5V, and a low-power Bluetooth beacon is connected. The double PH2.0 interface design provides a high-reliability backup for the power supply link, and the Bluetooth beacon connected with each PH2.0 interface can also cascade other Bluetooth beacons to realize Bluetooth beacon networking. The RJ45 interface of the pRRU is connected with a UWB base station conforming to the IEEE802.3af / at protocol, and positioning data of the UWB base station is transmitted back to a positioning engine of a system deployment to realize the mixed indoor positioning networking requirement of the UWB base station and the Bluetooth beacon.

[0091] The digital distribution system provided in the embodiments of the present application can support multiple interface types such as RJ45, RJ11, PH2.0, USB TYPE-A and USB TYPE-C at the same time due to the adoption of the pRRU circuit integrating multiple interfaces. The RJ45 interface can provide 48V voltage output and support 100M Ethernet transmission at the same time, can supply power to a Bluetooth tag using standard POE power supply and transmit positioning data back, and realize positioning of the device connected to the pRRU. The RJ11 interface can provide an RS485 serial port, can provide 48V voltage output and support maximum 10M data transmission back. The double PH2.0 interface can provide double 3.5V voltage output, and the double PH2.0 interfaces are respectively connected with Bluetooth beacons and supply power to the Bluetooth beacons respectively to realize double-link high-reliability power supply of the Bluetooth beacons. The USB TYPE-A and USB TYPE-C USB interfaces in two forms can respectively provide 5V voltage output, and can both provide a data transmission channel with maximum 480Mbps bandwidth. The integration of multiple interfaces can simultaneously support power supply of multiple Bluetooth devices and peripherals and different back transmission bandwidth difference requirements in different scenarios, and improve the flexibility of networking scheme design and engineering deployment.

[0092] The power supply of the RJ45, RJ11, PH2.0, USB TYPE-A and USB TYPE-C in the pRRU can also be controlled. When no peripheral is connected, the power supply is turned off, the overall power consumption of the pRRU can be reduced when there is no peripheral, unnecessary power consumption is reduced, overall energy consumption is reduced, and the energy-saving effect is remarkable, especially when a large number of devices are deployed. The aging of circuits and components can be reduced, thereby prolonging the service life of the device. The heat generation of the device can be reduced, the temperature can be reduced, and the stability and reliability of the device can be improved. Short circuit phenomenon or other electrical faults caused by accidental contact can be avoided, and the risk of failure can be reduced.

[0093] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pRRU circuit, characterized by, The application relates to a device for providing power supply to external devices, which comprises a processor, at least one radio frequency transceiver and at least one radio frequency circuit; the processor is electrically connected with each radio frequency transceiver, and each radio frequency transceiver is electrically connected with a corresponding radio frequency circuit; the processor is also electrically connected with at least one optical port and a plurality of external power supply interfaces, which include at least two of an RJ45 interface, a USB TYPE-C interface, a USB TYPE-A interface, a PH2.0 interface and an RJ11 interface. The processor comprises a master control chip and an FPGA; the master control chip is electrically connected with the FPGA; the FPGA is electrically connected with each radio frequency transceiver; and the FPGA is also electrically connected with the at least one optical port and the plurality of external power supply interfaces.

2. The pRRU circuit of claim 1, wherein, The plurality of external power supply interfaces include at least one RJ45 interface; the RJ45 interface is electrically connected with a PSE chip, and the PSE chip is also electrically connected with a power input interface; the RJ45 interface is also electrically connected with an Ethernet controller, and the Ethernet controller is electrically connected with an FPGA.

3. The pRRU circuit of claim 2, wherein, The plurality of external power supply interfaces include at least one USB TYPE-C interface; the USB TYPE-C interface is electrically connected with a first USB controller, and the first USB controller is also electrically connected with the FPGA; the USB TYPE-C interface is also electrically connected with a first current limiting IC, and the first current limiting IC is also electrically connected with a first voltage reducing power supply; the first voltage reducing power supply is also electrically connected with the power input interface and the FPGA; the master control chip is used for generating a first switch control signal when there is no external device connected to the USB TYPE-C interface; and the FPGA is used for controlling the first voltage reducing power supply to stop working according to the first switch control signal.

4. The pRRU circuit of claim 2, wherein, The plurality of external power supply interfaces include at least one USB TYPE-A interface; the USB TYPE-A interface is electrically connected with a second USB controller, and the second USB controller is also electrically connected with the FPGA; the USB TYPE-A is also electrically connected with a second current limiting IC, and the second current limiting IC is also electrically connected with a second voltage reducing power supply; the second voltage reducing power supply is also electrically connected with the power input interface and the FPGA; the master control chip is used for generating a second switch control signal when there is no external device connected to the USB TYPE-A; and the FPGA is used for controlling the second voltage reducing power supply to stop working according to the second switch control signal.

5. The pRRU circuit of claim 2, wherein, The plurality of external power supply interfaces include at least one PH2.0 interface; the PH2.0 interface is electrically connected with a third voltage reducing power supply; the third voltage reducing power supply is also electrically connected with the power input interface and the FPGA; the master control chip is used for generating a third switch control signal when there is no external device connected to the PH2.0 interface; and the FPGA is used for controlling the third voltage reducing power supply to stop working according to the third switch control signal.

6. The pRRU circuit of claim 2, wherein, ​ 7. The pRRU circuit of claim 2, wherein, The plurality of external power supply interfaces comprises at least one RJ11 interface; the RJ11 interface is electrically connected with an RS485 chip, and the RS485 chip is further electrically connected with the FPGA; the RJ11 interface is further electrically connected with a power switch, and the power switch is further electrically connected with a power input interface and the FPGA respectively.

8. The pRRU circuit of any of claims 2-7, wherein, Further comprising: a storage chip; the storage chip is electrically connected with the master control chip.

9. The pRRU circuitry of any of claims 2-7, wherein, Further comprising: a clock module; the clock module is electrically connected with the master control chip, the FPGA and each radio frequency transceiver respectively.

10. A digitized room division system characterized by Comprise: a baseband processing unit, an expansion unit and at least one pRRU circuit as claimed in any one of claims 1-9; the baseband processing unit is electrically connected with the expansion unit, and the expansion unit is electrically connected with each pRRU circuit respectively.

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