Low-power-consumption passive indoor distribution state monitoring method and system

Abstract

The invention provides a low-power-consumption passive indoor distribution state monitoring method and system, the method is applied to the system, the system comprises a low-power-consumption passive indoor distribution state monitoring device and a background, and the device and an indoor distribution antenna in a DAS system are correspondingly arranged; the device comprises a directional coupler, a filter, a signal conversion module, a state monitoring module, a communication module and a controller. A first transmission line of the directional coupler is connected in series in a feeder line of an indoor distribution antenna. In the method, the directional coupler collects a radio frequency power signal of the indoor distribution antenna and converts the radio frequency power signal into a voltage signal through a filter and a signal conversion module; and if a preset wake-up condition is met, the controller wakes up the state monitoring module and the communication module, acquires a voltage signal to determine an abnormal detection result of the indoor distribution antenna, determines state detection information of the indoor distribution antenna and uploads the state detection information to a background, and the background determines a power detection result of the DAS system, so that antenna device-level fault monitoring and long-time standby are realized.

Description

Technical Field

[0001] The present application relates to the technical field of passive distributed systems, and in particular to a low-power passive indoor distributed status monitoring method and system. Background Art

[0002] Passive distribution system (DAS) coverage involves evenly distributing the wireless signals output by the remote radio unit (RRU) of wireless network signal source equipment within a building through passive components such as power splitters and couplers, ensuring good wireless signal coverage in all areas where users reside. Currently, DAS maintenance presents numerous challenges for the following reasons: a large number of maintenance sites and numerous components; a lack of active fault detection, with passive fault handling being the primary method; specialized instrumentation required for passive component testing, placing high demands on maintenance personnel; a lack of fault monitoring at the device and antenna level; and a lack of building-site-level signal detection. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a low-power passive indoor status monitoring method and system, which can realize active fault perception, antenna device-level fault monitoring, low power consumption and long standby time, and reduce construction replacement.

[0004] A low-power passive indoor state monitoring method provided in an embodiment of the present application is applied to a low-power passive indoor state monitoring system, wherein the low-power passive indoor state monitoring system includes a low-power passive indoor state monitoring device and a background, wherein the low-power passive indoor state monitoring device and the indoor antenna in the DAS system are correspondingly arranged; the low-power passive indoor state monitoring device includes a directional coupler, a filter, a signal conversion module, a state monitoring module, a communication module and a controller; the first transmission line of the directional coupler is connected in series to the feeder of the indoor antenna, the second transmission line in the directional coupler coupled to the first transmission line is connected to the filter, the signal output end of the filter is connected to the signal conversion module, the signal output end of the signal conversion module is connected to the state monitoring module, and the state monitoring is connected to the background communication via the communication module; the state monitoring module is connected to the controller;

[0005] The method comprises the following steps:

[0006] In response to a preset wake-up condition being met, the controller wakes up the status monitoring module and the communication module in a dormant state, so that the low-power passive indoor status monitoring device enters a normal working mode;

[0007] In normal working mode, the directional coupler collects the radio frequency power signal in the feeder of the corresponding indoor antenna, transmits the radio frequency power signal to the signal conversion module through the filter, and the signal conversion module converts the radio frequency power signal into a voltage signal;

[0008] The status monitoring module collects the voltage signal output by the signal conversion module, and determines an abnormality detection result of the indoor antenna based on the voltage signal, determines status detection information of the indoor antenna based on the abnormality detection result, and uploads the status detection information of the indoor antenna to the backend through the communication module;

[0009] The backend receives the status detection result of the indoor antenna, and determines the power detection result of the DAS system based on the status detection result of the indoor antenna.

[0010] In some embodiments, in the low-power passive indoor state monitoring method, the controller wakes up the state monitoring module and the communication module in a dormant state in response to a preset wake-up condition being met, so that the low-power passive indoor state monitoring device enters a normal working mode, including:

[0011] In response to reaching a preset wake-up time, the controller sends a first wake-up signal to the state monitoring module to wake up the state monitoring module in a dormant state, and the state detection module wakes up the communication module;

[0012] and / or,

[0013] In response to receiving the target wake-up instruction, the controller sends a first wake-up signal to the state monitoring module to wake up the state monitoring module in the dormant state, and the state detection module wakes up the communication module.

[0014] In some embodiments, the low-power passive indoor status monitoring method further includes:

[0015] After the status monitoring module uploads the status detection information of the indoor antenna to the background through the communication module, the status monitoring module controls the communication module to enter the sleep state in response to meeting the preset sleep condition, and the status monitoring module enters the sleep state.

[0016] In some embodiments, in the low-power passive indoor status monitoring method, after the status monitoring module uploads the status detection information of the indoor antenna to the background through the communication module, the status monitoring module and the communication module control the communication module to enter a sleep state in response to meeting a preset sleep condition, and the status monitoring module enters a sleep state, including:

[0017] When the status monitoring module in normal working mode receives the interaction information returned by the background, and / or the number of times the status detection information is repeatedly uploaded without receiving the returned response information reaches a preset number threshold, the communication module is controlled to enter the sleep state after waiting for a preset timeout period;

[0018] The status monitoring module enters a dormant state;

[0019] The interaction information includes: response information returned by the background in response to the status detection information, and a setting instruction sent by the background.

[0020] In some embodiments, in the low-power passive indoor status monitoring method, the status monitoring module uploads the status detection information of the indoor antenna to the backend via the communication module, including:

[0021] The status monitoring module determines whether a response message returned by the background in response to the status detection information is received;

[0022] If not, the status monitoring module uploads the status detection information of the indoor antenna to the background again through the communication module, and determines again whether the response information returned by the background for the status detection information uploaded this time is received.

[0023] In some embodiments, the low-power passive indoor status monitoring method further includes:

[0024] After the status monitoring module determines that it has received the response information returned by the background in response to the status detection information, the status monitoring module waits within a preset setting time to see whether it has received a setting instruction sent by the background;

[0025] If yes, the status monitoring module processes and stores the setting instruction, and sends a setting signal to the controller, so that the controller updates the preset wake-up condition based on the setting signal.

[0026] In some embodiments, the low-power passive indoor status monitoring method further includes:

[0027] The backend detects that the data transmission rate in the target area is lower than a preset rate threshold, and / or the disconnection frequency is greater than a preset frequency threshold, and / or the number of user complaints regarding signal quality is greater than a preset complaint threshold, and generates a setting instruction for the low-power passive indoor status monitoring device in the target area;

[0028] After receiving the status detection information, the background sends the setting instruction to the status monitoring module of the low-power passive indoor status monitoring device in the target area.

[0029] In some embodiments, in the low-power passive indoor state monitoring method, the low-power passive indoor state monitoring device further includes a power supply module, which includes a power supply, a voltage conversion circuit and a battery sampling circuit; the voltage output end of the power supply is connected to the voltage conversion circuit, and the output end of the voltage conversion circuit supplies power to the low-power passive indoor state monitoring device; the sampling end of the battery sampling circuit is connected to the voltage output end of the battery, and the output end of the battery sampling circuit is connected to the battery sampling end of the state monitoring module, and a switch circuit is provided between the sampling end and the output end of the battery sampling circuit, and the switch circuit is connected to the switch control end of the state monitoring module;

[0030] The method further comprises:

[0031] In response to a preset wake-up condition being met, the controller wakes up the state monitoring module in a dormant state, and the state monitoring module controls the switch circuit to be turned on, and collects the power state signal of the power supply module through the battery sampling circuit;

[0032] In response to a preset sleep condition being met, the state monitoring module enters a sleep state and controls the switch circuit to be turned off.

[0033] In some embodiments, in the low-power passive indoor status monitoring method, the low-power passive indoor status monitoring device collects the radio frequency power signal in the feeder of the corresponding indoor antenna through a directional coupler, transmits the radio frequency power signal to the signal conversion module through a filter, and the signal conversion module converts the radio frequency power signal into a voltage signal, including:

[0034] Collecting a radio frequency power signal in a feeder line of the indoor antenna through the first transmission line of the directional coupler, coupling the radio frequency power signal to a second transmission line, and transmitting the radio frequency power signal to a filter through the second transmission line;

[0035] The filter filters the radio frequency power signal to obtain a filtered radio frequency power signal and sends it to the signal conversion module;

[0036] The signal conversion module converts the filtered radio frequency power signal into a voltage signal.

[0037] In some embodiments, a low-power passive indoor status monitoring system is further provided, which is applied to the low-power passive indoor status monitoring system. The low-power passive indoor status monitoring system includes a low-power passive indoor status monitoring device and a background. The low-power passive indoor status monitoring device and the indoor antenna in the DAS system are correspondingly arranged; the low-power passive indoor status monitoring device includes a directional coupler, a filter, a signal conversion module, a status monitoring module, a communication module and a controller; the first transmission line of the directional coupler is connected in series to the feeder of the indoor antenna, the second transmission line in the directional coupler coupled to the first transmission line is connected to the filter, the signal output end of the filter is connected to the signal conversion module, the signal output end of the signal conversion module is connected to the status monitoring module, and the status monitoring is connected to the background communication through the communication module; the status monitoring module is connected to the controller;

[0038] The controller is configured to wake up the status monitoring module and the communication module in a dormant state in response to a preset wake-up condition being met, so as to enable the low-power passive indoor status monitoring device to enter a normal working mode;

[0039] In normal working mode, the directional coupler collects the radio frequency power signal in the feeder of the corresponding indoor antenna, transmits the radio frequency power signal to the signal conversion module through the filter, and the signal conversion module converts the radio frequency power signal into a voltage signal;

[0040] The state monitoring module is used to collect the voltage signal output by the signal conversion module, and determine the abnormality detection result of the indoor antenna based on the voltage signal, determine the state detection information of the indoor antenna based on the abnormality detection result, and upload the state detection information of the indoor antenna to the backend through the communication module;

[0041] The backend is used to receive the status detection result of the indoor antenna and determine the power detection result of the DAS system based on the status detection result of the indoor antenna.

[0042] In an embodiment of the present application, a low-power passive indoor state monitoring method and system are provided. The monitoring method is applied to a low-power passive indoor state monitoring system, wherein the low-power passive indoor state monitoring system includes a low-power passive indoor state monitoring device and a background. The low-power passive indoor state monitoring device and the indoor antenna in the DAS system are correspondingly arranged; the low-power passive indoor state monitoring device includes a directional coupler, a filter, a signal conversion module, a state monitoring module, a communication module and a controller; the first transmission line of the directional coupler is connected in series to the feeder of the indoor antenna, the second transmission line in the directional coupler coupled to the first transmission line is connected to the filter, the signal output end of the filter is connected to the signal conversion module, the signal output end of the signal conversion module is connected to the state monitoring module, and the state monitoring is connected to the background through the communication module; the state monitoring module is connected to the controller; the method includes the following steps: the controller wakes up the state monitoring module and the communication module in the dormant state in response to meeting the preset wake-up condition, so that the low-power passive indoor state monitoring device enters the normal working mode In a normal operating mode, the directional coupler collects a radio frequency power signal from a feeder of a corresponding indoor antenna, transmits the radio frequency power signal to a signal conversion module through a filter, and the signal conversion module converts the radio frequency power signal into a voltage signal. The status monitoring module collects the voltage signal output by the signal conversion module and determines an abnormality detection result of the indoor antenna based on the voltage signal. Based on the abnormality detection result, status detection information of the indoor antenna is determined, and the status detection information of the indoor antenna is uploaded to a backend through a communication module. The backend receives the status detection result of the indoor antenna and determines a power detection result of the DAS system based on the status detection result of the indoor antenna. Active fault sensing and antenna component-level fault monitoring are achieved based on the method. Moreover, the feeder wiring of the directional coupler and the indoor antenna is simple and can be replaced and connected on site, which is simple to construct. The overall cost of the device is low, which facilitates control of construction and modification costs. A mechanism for switching between a sleep mode and a normal operating mode is adopted to achieve low power consumption and long standby time, reducing the construction and replacement of the power supply part. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 A flowchart of the low-power passive indoor state monitoring method according to an embodiment of the present application is shown;

[0045] Figure 2 The schematic diagram of the low-power passive indoor status monitoring device according to an embodiment of the present application is shown;

[0046] Figure 3 The schematic diagram of the circuit of the directional coupler, filter and detector described in the embodiment of the present application is shown;

[0047] Figure 4 The schematic diagram of the circuit of the state monitoring module according to the embodiment of the present application is shown;

[0048] Figure 5 A circuit diagram of the power supply module according to an embodiment of the present application is shown;

[0049] Figure 6 The figure shows a circuit diagram of the power supply module according to an embodiment of the present application;

[0050] Figure 7 The schematic diagram of the circuit of the SIM card module according to the embodiment of the present application is shown;

[0051] Figure 8 The circuit diagram of the network port connection indicator light according to the embodiment of the present application is shown;

[0052] Figure 9 The flowchart of the low-power passive indoor status monitoring system described in the embodiment of the present application is shown. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of illustration and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps without logical context can be reversed or implemented simultaneously. In addition, those skilled in the art, under the guidance of the contents of this application, can add one or more other operations to the flowchart, or remove one or more operations from the flowchart.

[0054] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0055] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0056] Passive distribution system (DAS) coverage involves evenly distributing the wireless signals output by the remote radio unit (RRU) of wireless network signal source equipment within a building through passive components such as power splitters and couplers, ensuring good wireless signal coverage in all areas where users reside. Currently, DAS maintenance presents numerous challenges for the following reasons: a large number of maintenance sites and numerous components; a lack of active fault detection, with passive fault handling being the primary method; specialized instrumentation required for passive component testing, placing high demands on maintenance personnel; a lack of fault monitoring at the device and antenna level; and a lack of building-site-level signal detection.

[0057] Based on this, the present invention provides a low-power passive indoor status monitoring method and system.

[0058] The low-power passive indoor status monitoring system includes a low-power passive indoor status monitoring device and a background, and the low-power passive indoor status monitoring device and the indoor antenna in the DAS system are correspondingly arranged; the low-power passive indoor status monitoring device includes a directional coupler, a filter, a signal conversion module, a status monitoring module, a communication module and a controller; the first transmission line of the directional coupler is connected in series to the feeder of the indoor antenna, the second transmission line coupled to the first transmission line in the directional coupler is connected to the filter, the signal output end of the filter is connected to the signal conversion module, the signal output end of the signal conversion module is connected to the status monitoring module, and the status monitoring is connected to the background through the communication module; the status monitoring module is connected to the controller; the method includes the following steps: the controller wakes up the status monitoring module and the communication module in the dormant state in response to meeting the preset wake-up condition, so that the low-power passive indoor status monitoring device enters the normal working mode; in the normal working mode, the directional coupler collects the corresponding indoor antenna The method includes a method for detecting an RF power signal in a feeder of a directional coupler and transmitting the RF power signal to a signal conversion module through a filter. The signal conversion module converts the RF power signal into a voltage signal. The status monitoring module collects the voltage signal output by the signal conversion module and determines an abnormality detection result of the indoor antenna based on the voltage signal. The status detection information of the indoor antenna is determined based on the abnormality detection result, and the status detection information of the indoor antenna is uploaded to a backend through a communication module. The backend receives the status detection result of the indoor antenna and determines the power detection result of the DAS system based on the status detection result of the indoor antenna. Active fault sensing and antenna component-level fault monitoring are achieved based on the method. The feeder wiring of the directional coupler and the indoor antenna is simple and can be replaced and connected on site, which is simple to construct. The overall cost of the device is low, which facilitates the control of construction and modification costs. The device adopts a mechanism for switching between a sleep mode and a normal working mode to achieve low power consumption and long standby time, reducing the construction and replacement of the power supply part.

[0059] Please refer to Figure 1 , Figure 1 The flowchart of the low-power passive room status monitoring method according to the embodiment of the present application is shown; please refer to Figure 2 , Figure 2 The schematic diagram of the low-power passive indoor state monitoring device according to the embodiment of the present application is shown; the low-power passive indoor state monitoring method is applied to a low-power passive indoor state monitoring system, the low-power passive indoor state monitoring system includes a low-power passive indoor state monitoring device and a background, the low-power passive indoor state monitoring device and the indoor antenna in the DAS system are correspondingly arranged; as shown in FIG. Figure 2As shown, the low-power passive indoor status monitoring device includes a directional coupler 201, a filter 202, a signal conversion module 203, a status monitoring module 204, a communication module 206 and a controller 205; the first transmission line of the directional coupler 201 is connected in series to the feeder of the indoor antenna, the second transmission line coupled to the first transmission line in the directional coupler 201 is connected to the filter 202, the signal output end of the filter 202 is connected to the signal conversion module 203, the signal output end of the signal conversion module 203 is connected to the status monitoring module 204, and the status monitoring is connected to the background communication through the communication module 206; the status monitoring module 204 is connected to the controller 205.

[0060] Please refer to Figure 1 , the method comprises the following steps S101-S104:

[0061] S101, in response to a preset wake-up condition being met, the controller wakes up the status monitoring module and the communication module in the dormant state, so that the low-power passive indoor status monitoring device enters a normal working mode;

[0062] S102. In a normal working mode, the directional coupler collects a radio frequency power signal from a feeder line of the corresponding indoor antenna, transmits the radio frequency power signal to a signal conversion module through a filter, and the signal conversion module converts the radio frequency power signal into a voltage signal.

[0063] S103, the state monitoring module collects the voltage signal output by the signal conversion module, and determines an abnormality detection result of the indoor antenna based on the voltage signal, determines state detection information of the indoor antenna based on the abnormality detection result, and uploads the state detection information of the indoor antenna to the backend through the communication module;

[0064] S104: The background receives a status detection result of the indoor antenna, and determines a power detection result of the DAS system based on the status detection result of the indoor antenna.

[0065] In some embodiments, the signal conversion module is a detector.

[0066] The state monitoring module, communication module and controller can be integrated into one piece or provided separately.

[0067] Integrated integration means integrating the condition monitoring module, communication module and controller into the same physical device or module. The integrated design reduces the number of components, lowers manufacturing costs, and makes configuration, monitoring and maintenance easier.

[0068] The state monitoring module, communication module and controller exist as independent components and are connected and communicate with each other.

[0069] The first transmission line of the directional coupler is connected in series to the feed line of the indoor antenna, and the radio frequency power signal in the feed line of the indoor antenna is collected through the first transmission line.

[0070] A directional coupler is a four-port component, usually composed of two transmission lines: a straight line (main line) and a coupled line (sub-line). The working principle of a directional coupler is based on the coupling phenomenon of electromagnetic waves. When electromagnetic waves propagate in a transmission line, if the two transmission lines are close enough, the power on one line can be transferred to the other line through the coupling mechanism.

[0071] Here, the first transmission line is a through line (main line), and the second transmission line is a coupled line (sub-line).

[0072] In the embodiment of the present application, the directional coupler is a 20dB coupler; a directional coupler 20dB coupler is introduced at the input end of the passive distribution system (DAS) to extract the signal, thereby minimizing the impact on the original coverage.

[0073] Moreover, when modifying the existing passive distribution system (DAS) and deploying the low-power passive indoor status monitoring device described in the embodiment of the present application, it is only necessary to disconnect the feeder line of the indoor antenna and connect it to the first transmission line of the directional coupler. The construction and replacement are very simple and the cost is low.

[0074] The second transmission line coupled between the directional coupler and the first transmission line is connected to a filter, which is specifically a bandpass filter. The signal output end of the filter is connected to a detector, which is connected to a status monitoring module.

[0075] The status detection module can also be called a main control chip, MCU, etc.

[0076] Please refer to Figure 3 , Figure 3 The circuit schematic diagram of the directional coupler, filter, and detector described in the embodiment of the present application is shown; please refer to Figure 4 , Figure 4 The figure shows a circuit diagram of the status monitoring module described in the embodiment of the present application.

[0077] In step S101, in response to a preset wake-up condition being met, the controller wakes up the status monitoring module and the communication module in a dormant state, so that the low-power passive indoor status monitoring device enters a normal working mode.

[0078] The controller here can be a timer, other triggers, etc.; the other triggers can be network communication triggers, which trigger the operation of the status monitoring module when receiving specific instructions from the cloud or server.

[0079] The timer has lower energy consumption, and other triggers can realize richer functions.

[0080] The controller wakes up the status monitoring module and the communication module in a dormant state in response to a preset wake-up condition being met, so that the low-power passive indoor status monitoring device enters a normal working mode, including:

[0081] In response to reaching a preset wake-up time, the controller sends a first wake-up signal to the state monitoring module to wake up the state monitoring module in a dormant state, and the state detection module wakes up the communication module;

[0082] and / or,

[0083] In response to receiving the target wake-up instruction, the controller sends a first wake-up signal to the state monitoring module to wake up the state monitoring module in the dormant state, and the state detection module wakes up the communication module.

[0084] Here, the target wake-up instruction may be sent by a background or terminal device, or may be sent by a hard line, an external device, a button, or a switch.

[0085] That is to say, the status monitoring module can be pre-configured to be started only a preset number of times a day in normal working mode, for example twice a day, or it can be started according to the target wake-up instruction of the background; when the background detects that the data transmission rate in the target area is lower than the preset rate threshold, and / or the disconnection frequency is greater than the preset frequency threshold, and / or the number of user complaints about signal quality is greater than the preset complaint threshold, it indicates that the wireless signal quality in the target area covered by the DAS system has decreased, which may be a manifestation of an abnormal antenna power signal. At this time, in addition to the routine detection twice a day, the antenna power signal is actively detected again to determine whether there is a problem.

[0086] In this way, through routine inspections a preset number of times a day and active detection triggered by target wake-up commands, the advantages of periodic monitoring and event-driven monitoring are combined, which can ensure stable system operation and timely detection of faults while minimizing energy consumption.

[0087] In step S102, in normal working mode, the directional coupler collects the RF power signal in the feeder of the corresponding indoor antenna, transmits the RF power signal to the signal conversion module through the filter, and the signal conversion module converts the RF power signal into a voltage signal.

[0088] The low-power passive indoor status monitoring device collects the radio frequency power signal in the feeder of the corresponding indoor antenna through a directional coupler, transmits the radio frequency power signal to the signal conversion module through a filter, and the signal conversion module converts the radio frequency power signal into a voltage signal.

[0089] Specifically, the low-power passive indoor status monitoring device collects the radio frequency power signal in the feeder of the corresponding indoor antenna through a directional coupler, transmits the radio frequency power signal to the signal conversion module through a filter, and the signal conversion module converts the radio frequency power signal into a voltage signal, including:

[0090] Collecting a radio frequency power signal in a feeder line of the indoor antenna through the first transmission line of the directional coupler, coupling the radio frequency power signal to a second transmission line, and transmitting the radio frequency power signal to a filter through the second transmission line;

[0091] The filter filters the radio frequency power signal to obtain a filtered radio frequency power signal and sends it to the signal conversion module;

[0092] The signal conversion module converts the filtered radio frequency power signal into a voltage signal.

[0093] As an example only, the filter is selected to have an in-band insertion loss of less than 3.5 dB and an out-of-band attenuation of 50 MHz to 5300 MHz greater than 20 dB.

[0094] The coupled signal is filtered by the bandpass filter to avoid interference from other frequency bands on the detector.

[0095] After filtering the RF power signal, the filter sends the filtered RF power signal to the detector, which accurately converts the filtered RF power signal into a corresponding logarithmic linear output with a typical dynamic range of 45dB and a logarithmic error of less than ±1dB. The filtered RF power signal is then subjected to power-level conversion, converted into a voltage value, and transmitted to the ADC interface of the status monitoring module.

[0096] The status monitoring module and communication module have two states: sleep mode and normal working mode; sleep mode is a low-power state. When the module does not need to collect and transmit data, it can enter this mode to reduce energy consumption; in sleep mode, most functions of the module are turned off, only the basic clock and communication interface remain active to wait for the wake-up signal; normal working mode is the state in which the status monitoring module and communication module perform data collection, processing, transmission and communication. In normal working mode, the module's data processing, network communication and other functions are active, and the power consumption is relatively high.

[0097] In step S103, the status monitoring module collects the voltage signal output by the signal conversion module, and determines the abnormality detection result of the indoor antenna based on the voltage signal, determines the status detection information of the indoor antenna based on the abnormality detection result, and uploads the status detection information of the indoor antenna to the background through the communication module.

[0098] The abnormality detection results include normal and abnormal.

[0099] When the indoor antenna is abnormal, the RF power signal in the feeder of the indoor antenna will be abnormal, and usually the RF power signal cannot be detected.

[0100] Based on this, the state monitoring module in the normal working mode determines the abnormality detection result of the indoor antenna based on the voltage signal, and determines the state detection information of the indoor antenna based on the abnormality detection result; specifically, including:

[0101] The state monitoring module in normal working mode determines an abnormality detection result of the indoor antenna based on the radio frequency power data corresponding to the voltage signal;

[0102] When the abnormality detection result is normal, the status monitoring module generates status detection information of the indoor antenna based on the radio frequency power data;

[0103] When the abnormality detection result is abnormal, the status monitoring module generates alarm data, and generates status detection information of the indoor antenna based on the radio frequency power data and the alarm data.

[0104] Here, since the voltage signal is the RF power signal after the detector conversion, the voltage signal represents the magnitude of the RF power. Therefore, the voltage value of the voltage signal can be used as RF power data to directly determine the abnormality detection result of the indoor antenna.

[0105] Alternatively, after the status monitoring module collects the voltage value, it calculates the radio frequency power value based on the voltage value, and determines the abnormality detection result of the indoor antenna based on the radio frequency power value.

[0106] As an example only, when the RF power value is less than a preset RF power threshold, the indoor antenna is determined to be abnormal; when the RF power value is greater than or equal to the preset RF power threshold, the indoor antenna is determined to be normal.

[0107] Based on this, the status detection information of the indoor antenna includes the radio frequency power corresponding to the voltage signal, the abnormal detection result of the indoor antenna, alarm information, etc.

[0108] The state monitoring module uploads the state detection information of the indoor antenna to the backend through the communication module, including:

[0109] The status monitoring module determines whether a response message returned by the background in response to the status detection information is received;

[0110] If not, the status monitoring module uploads the status detection information of the indoor antenna to the background again through the communication module, and determines again whether the response information returned by the background for the status detection information uploaded this time is received.

[0111] That is to say, if the status monitoring module does not receive the returned response information, it needs to repeatedly send the status detection information multiple times to ensure that the status detection information is sent to the background.

[0112] In the step S104, the background receives the status detection result of the indoor antenna, and determines the power detection result of the DAS system based on the status detection result of the indoor antenna.

[0113] In some embodiments, the low-power passive indoor status monitoring method also includes: after the status monitoring module uploads the status detection information of the indoor antenna to the background through the communication module, the status monitoring module controls the communication module to enter a sleep state in response to meeting a preset sleep condition, and the status monitoring module enters a sleep state.

[0114] After the status monitoring module uploads the status detection information of the indoor antenna to the backend through the communication module, the status monitoring module and the communication module control the communication module to enter a sleep state in response to meeting a preset sleep condition, and the status monitoring module enters a sleep state, including:

[0115] When the status monitoring module in normal working mode receives the interaction information returned by the background, and / or the number of times the status detection information is repeatedly uploaded without receiving the returned response information reaches a preset number threshold, the communication module is controlled to enter the sleep state after waiting for a preset timeout period;

[0116] The status monitoring module enters a dormant state;

[0117] The interaction information includes: response information returned by the background in response to the status detection information, and a setting instruction sent by the background.

[0118] Specifically, when the status monitoring module in the normal working mode receives the response information returned by the background for the status detection information, the status monitoring module waits for a preset timeout period and then enters the dormant state;

[0119] When the status monitoring module in the normal working mode does not receive the response information returned by the background for the status detection information, it uploads the status detection information of the indoor antenna to the background again, and determines again whether the judgment block receives the response information returned by the background for the status detection information uploaded this time;

[0120] When the number of times that the status monitoring module does not receive the returned response information reaches a preset number threshold, the status monitoring module waits for a preset timeout period and then enters a dormant state.

[0121] When the status monitoring module is awakened, in addition to sending the status detection information, it can also receive setting information sent by the background, and the setting information can set parameters such as the next preset wake-up time; when the status monitoring module no longer sends or receives any information or instructions, it waits for the preset timeout period to enter the sleep state.

[0122] The setting information sent by the background can be automatically sent according to preset rules, or can be setting information set according to customer requirements, such as setting the next wake-up time based on customer requirements, setting the received information type (for example, only receiving RF power information this time), etc.

[0123] In some embodiments, the low-power passive indoor status monitoring method further includes:

[0124] After the status monitoring module determines that it has received the response information returned by the background in response to the status detection information, the status monitoring module waits within a preset setting time to see whether it has received a setting instruction sent by the background;

[0125] If yes, the status monitoring module processes and stores the setting instruction, and sends a setting signal to the controller, so that the controller updates the preset wake-up condition based on the setting signal.

[0126] The low-power passive indoor state monitoring method further includes:

[0127] The backend detects that the data transmission rate in the target area is lower than a preset rate threshold, and / or the disconnection frequency is greater than a preset frequency threshold, and / or the number of user complaints regarding signal quality is greater than a preset complaint threshold, and generates a setting instruction for the low-power passive indoor status monitoring device in the target area;

[0128] After receiving the status detection information, the background sends the setting instruction to the status monitoring module of the low-power passive indoor status monitoring device in the target area.

[0129] That is to say, under normal circumstances, the low-power passive indoor status monitoring device sends a setting instruction to adjust the detection frequency and other information after the MCU is awakened; the reason is that under normal circumstances, it takes some time to discover the failure of the system, and doing so can use a simple local controller (such as a trigger), which is more energy-saving than waking up the low-power passive indoor status monitoring device as soon as a problem is discovered.

[0130] Based on this, specifically, when the status monitoring module in the normal working mode receives the response information returned by the background for the status detection information, the status monitoring module waits for a preset timeout period and then enters a dormant state; including:

[0131] When the status monitoring module in the normal working mode receives the response information returned by the background for the status detection information, the status monitoring module waits to see whether a setting instruction sent by the background is received;

[0132] If yes, the status monitoring module processes and stores the setting instruction, sends a setting signal to the controller, so that the controller updates the preset wake-up condition based on the setting signal, and returns a setting success message to the background;

[0133] The state monitoring module enters a dormant state after waiting for a preset timeout period.

[0134] Exemplarily, the preset timeout period is 3 seconds.

[0135] The status monitoring module sends the RF power value to the background. The background determines whether the node of the DAS system corresponding to the low-power passive indoor status monitoring device is normal based on the status detection information of the indoor antenna in the DAS system, thereby realizing active fault perception of the DAS system and antenna device-level fault monitoring.

[0136] Please refer to Figure 5 , Figure 5 The circuit diagram of the power supply module according to the embodiment of the present application is shown; please refer to Figure 6 , Figure 6 : shows a circuit diagram of the power supply module according to an embodiment of the present application; Figure 5 and Figure 6In some embodiments, in the low-power passive indoor state monitoring method, the low-power passive indoor state monitoring device further includes a power supply module, which includes a power supply, a voltage conversion circuit and a battery sampling circuit; the voltage output end of the power supply is connected to the voltage conversion circuit, and the output end of the voltage conversion circuit supplies power to the low-power passive indoor state monitoring device; the sampling end of the battery sampling circuit is connected to the voltage output end of the battery, and the output end of the battery sampling circuit is connected to the battery sampling end of the state monitoring module, and a switch circuit is provided between the sampling end and the output end of the battery sampling circuit, and the switch circuit is connected to the switch control end of the state monitoring module;

[0137] The method further comprises:

[0138] In response to a preset wake-up condition being met, the controller wakes up the state monitoring module in a dormant state, and the state monitoring module controls the switch circuit to be turned on, and collects the power state signal of the power supply module through the battery sampling circuit;

[0139] In response to a preset sleep condition being met, the state monitoring module enters a sleep state and controls the switch circuit to be turned off.

[0140] That is to say, the power supply module supplies power to the modules that need power in the low-power passive indoor status monitoring device. When the status monitoring module is the main control chip in the NB module, the circuit schematic diagram of the power supply module is as follows: Figure 5 shown.

[0141] The power source is at least one of the following: a battery, a voltage output terminal of a higher-level circuit, or a solar power source. Specifically, the appropriate power source can be selected based on the model and installation location of the indoor antenna. The power source can be used independently or in combination, for example, using two lithium-ion batteries or a combination of two lithium-ion batteries and a solar power source.

[0142] The battery is a dry cell and / or a rechargeable battery.

[0143] Rechargeable batteries are batteries that can be charged and discharged repeatedly and are therefore reusable, making them more economical and environmentally friendly in the long run.

[0144] The capacity of the rechargeable battery can be designed based on the specifications of the indoor antenna.

[0145] It should be noted that since the status monitoring module and the communication module can enter a low-power mode, the overall power of the low-power passive indoor status monitoring device is very low. The use of disposable batteries such as lithium-gerdium batteries can provide the monitoring device with long-term operation capabilities, thereby reducing the need for frequent battery replacement and improving the reliability and maintenance convenience of the equipment.

[0146] The battery sampling circuit divides the battery voltage into the range of the ADC sampling voltage of the status monitoring module (for example, within the range of 1.6V), and the switch circuit ensures that the voltage is cut off when not sampling to avoid leakage.

[0147] In the low-power passive indoor status monitoring device described in the embodiment of the present application, the status monitoring module interacts with the background. Specifically, the status monitoring module is provided with a SIM card module, and communication with the background is achieved based on the SIM card module.

[0148] Please refer to Figure 7 , Figure 7 The circuit diagram of the SIM card module according to the embodiment of the present application is shown; Figure 7 There are two types of SIM cards in parallel, eSIM card and nano SIM card; among them, eSIM is an embedded SIM card that can be directly integrated into the device without a physical SIM card slot; nano SIM card is a physical card that needs to be inserted into the SIM card slot of the device; you can choose one of them in the specific product, and during the test process, two types can be designed for testing at the same time, and the nano SIM card that can be plugged in and out during the test is more convenient for testing.

[0149] Please refer to Figure 8 The peripheral circuit of the status monitoring module is also provided with an Internet port connection indicator light, which can intuitively display the network connection status of the status monitoring module. When the indicator light is on, it usually indicates that the status monitoring module has been successfully connected to the network through the communication module; when the indicator light is off or flashing, it may indicate that there is a problem with the connection or that an attempt is being made to establish a connection, thereby providing a basis for troubleshooting.

[0150] The low-power passive indoor status monitoring device described in the embodiment of the present application can be designed as an integrated unit with the indoor antenna, or can be designed to be detachable; the filter in the device is located inside or outside the indoor antenna; the signal conversion module is located inside or outside the indoor antenna; the status monitoring module, communication module and controller can all be located inside or outside the indoor antenna; the directional coupler is located inside or outside the indoor antenna.

[0151] That is to say, the directional coupler, filter, detector, status monitoring module, communication module and controller in the device can all be independently installed inside or outside the indoor antenna, and can be flexibly arranged according to the type, structure, volume, etc. of the indoor antenna.

[0152] When the status monitoring module, the communication module and the controller are integrated into one body, the status monitoring module, the communication module and the controller are installed at the same position.

[0153] In some embodiments, the directional coupler, filter, detector, status monitoring module, communication module and controller are packaged into an integral device, which is located inside or outside the indoor antenna, reducing the number and complexity of the equipment and lowering the installation and maintenance costs. The integrated design makes the equipment more compact and convenient for installation and use in a limited space.

[0154] Please refer to Figure 9 , Figure 9 The following is a flowchart showing the low-power passive room status monitoring system according to an embodiment of the present application; as an example only, Figure 9 As shown, the normal working mode of the status monitoring module is set to start only twice a day, and the status monitoring module and the communication module are in deep sleep state at other times. When the low-power passive indoor status monitoring system is started and in sleep state, all external control switches are in off state, reaching the minimum power consumption state. After the preset wake-up conditions are met and wake-up is started, a connection is established with the network manager according to the network manager settings (tentative UDP) and reporting information (status detection information of the indoor antenna) is sent; after reporting, wait for the network manager to return confirmation information. If there is no return within the preset return time (the preset return time is tentatively 3s), continue to send. If there is no response after 3 consecutive reports, the system will enter sleep mode.

[0155] If the network management response information is received normally, the waiting timeout will enter sleep mode; if no background setting information is received during the waiting process, the system will go into sleep mode directly. If background setting information is received (battery data or RF power data is received), the system will process and store the setting information, and enter sleep mode again after returning the setting success information.

[0156] Based on the same inventive concept, a system corresponding to the low-power passive indoor status monitoring method is also provided in the embodiment of the present application. Since the principle of solving the problem by the system in the embodiment of the present application is similar to the low-power passive indoor status monitoring method described in the embodiment of the present application, the implementation of the system can refer to the implementation of the low-power passive indoor status monitoring method, and the repeated parts will not be repeated.

[0157] The present invention provides a low-power passive indoor status monitoring system.

[0158] The low-power passive indoor status monitoring system includes a low-power passive indoor status monitoring device and a background. The low-power passive indoor status monitoring device and the indoor antenna in the DAS system are correspondingly arranged; the low-power passive indoor status monitoring device includes a directional coupler, a filter, a signal conversion module, a status monitoring module, a communication module and a controller; the first transmission line of the directional coupler is connected in series to the feeder of the indoor antenna, the second transmission line in the directional coupler coupled to the first transmission line is connected to the filter, the signal output end of the filter is connected to the signal conversion module, the signal output end of the signal conversion module is connected to the status monitoring module, and the status monitoring is connected to the background through the communication module; the status monitoring module is connected to the controller;

[0159] The controller is configured to wake up the status monitoring module and the communication module in a dormant state in response to a preset wake-up condition being met, so as to enable the low-power passive indoor status monitoring device to enter a normal working mode;

[0160] In normal working mode, the directional coupler collects the radio frequency power signal in the feeder of the corresponding indoor antenna, transmits the radio frequency power signal to the signal conversion module through the filter, and the signal conversion module converts the radio frequency power signal into a voltage signal;

[0161] The state monitoring module is used to collect the voltage signal output by the signal conversion module, and determine the abnormality detection result of the indoor antenna based on the voltage signal, determine the state detection information of the indoor antenna based on the abnormality detection result, and upload the state detection information of the indoor antenna to the backend through the communication module;

[0162] The backend is used to receive the status detection result of the indoor antenna and determine the power detection result of the DAS system based on the status detection result of the indoor antenna.

[0163] In some embodiments, in the low-power passive indoor state monitoring system, the controller, when used to wake up the state monitoring module and the communication module in a dormant state in response to a preset wake-up condition being met, so that the low-power passive indoor state monitoring device enters a normal working mode, is specifically used to:

[0164] The controller is configured to send a first wake-up signal to the status monitoring module in response to reaching a preset wake-up time, so as to wake up the status monitoring module in a dormant state, and the status detection module wakes up the communication module;

[0165] and / or,

[0166] The controller is configured to send a first wake-up signal to the state monitoring module in response to receiving a target wake-up instruction, so as to wake up the state monitoring module in a dormant state, and the state detection module wakes up the communication module.

[0167] In some embodiments, in the low-power passive indoor status monitoring system, the status monitoring module is also used to upload the status detection information of the indoor antenna to the background through the communication module. In response to meeting the preset sleep conditions, the status monitoring module controls the communication module to enter the sleep state, and the status monitoring module to enter the sleep state.

[0168] In some embodiments, in the low-power passive indoor status monitoring system, the status monitoring module is configured to, after uploading the status detection information of the indoor antenna to the background through the communication module, control the communication module to enter a sleep state in response to meeting a preset sleep condition, and when the status monitoring module enters the sleep state, specifically to:

[0169] When the status monitoring module in normal working mode receives the interaction information returned by the background, and / or the number of times the status detection information is repeatedly uploaded without receiving the returned response information reaches a preset number threshold, the communication module is controlled to enter the sleep state after waiting for a preset timeout period;

[0170] The status monitoring module enters a dormant state;

[0171] The interaction information includes: response information returned by the background in response to the status detection information, and a setting instruction sent by the background.

[0172] In some embodiments, in the low-power passive indoor status monitoring system, the status monitoring module, when used to upload the status detection information of the indoor antenna to the backend through the communication module, is specifically used to:

[0173] The status monitoring module determines whether a response message returned by the background in response to the status detection information is received;

[0174] If not, the status monitoring module uploads the status detection information of the indoor antenna to the background again through the communication module, and determines again whether the response information returned by the background for the status detection information uploaded this time is received.

[0175] In some embodiments, in the low-power passive indoor status monitoring system, the status monitoring module is further configured to:

[0176] After determining whether the response information returned by the background for the status detection information is received, the status monitoring module waits within a preset setting time to see whether a setting instruction sent by the background is received;

[0177] If yes, the status monitoring module processes and stores the setting instruction, and sends a setting signal to the controller, so that the controller updates the preset wake-up condition based on the setting signal.

[0178] In some embodiments, in the low-power passive indoor status monitoring system,

[0179] The backend is further configured to detect that the data transmission rate in the target area is lower than a preset rate threshold, and / or the disconnection frequency is greater than a preset frequency threshold, and / or the number of user complaints regarding signal quality is greater than a preset complaint threshold, and generate a setting instruction for the low-power passive indoor status monitoring device in the target area;

[0180] After receiving the status detection information, the background sends the setting instruction to the status monitoring module of the low-power passive indoor status monitoring device in the target area.

[0181] In some embodiments, in the low-power passive indoor state monitoring system, the low-power passive indoor state monitoring device further includes a power supply module, which includes a power supply, a voltage conversion circuit and a battery sampling circuit; the voltage output end of the power supply is connected to the voltage conversion circuit, and the output end of the voltage conversion circuit supplies power to the low-power passive indoor state monitoring device; the sampling end of the battery sampling circuit is connected to the voltage output end of the battery, and the output end of the battery sampling circuit is connected to the battery sampling end of the state monitoring module, and a switch circuit is provided between the sampling end and the output end of the battery sampling circuit, and the switch circuit is connected to the switch control end of the state monitoring module;

[0182] The state monitoring module is further configured to control the switch circuit to conduct and collect the power state signal of the power supply module through the battery sampling circuit after the controller wakes up the state monitoring module in a dormant state in response to a preset wake-up condition being met;

[0183] The state monitoring module is further configured to control the switch circuit to turn off when entering a sleep state in response to a preset sleep condition being met.

[0184] In some embodiments, in the low-power passive indoor status monitoring system,

[0185] The directional coupler is configured to collect a radio frequency power signal in a feeder line of the indoor antenna through a first transmission line of the directional coupler, couple the radio frequency power signal to a second transmission line, and transmit the radio frequency power signal to a filter through the second transmission line;

[0186] The filter is used to filter the radio frequency power signal to obtain a filtered radio frequency power signal and send it to the signal conversion module;

[0187] The signal conversion module is used to convert the filtered radio frequency power signal into a voltage signal.

[0188] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0189] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed across multiple network elements. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0190] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0191] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the 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 for enabling a computer device (which can be a personal computer, platform server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

[0192] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A low-power passive indoor status monitoring method, characterized in that: Applied to a low-power passive indoor state monitoring system, the low-power passive indoor state monitoring system includes a low-power passive indoor state monitoring device and a background, the low-power passive indoor state monitoring device and the indoor antenna in the DAS system are correspondingly arranged; the low-power passive indoor state monitoring device includes a directional coupler, a filter, a signal conversion module, a state monitoring module, a communication module and a controller; the first transmission line of the directional coupler is connected in series to the feeder of the indoor antenna, the second transmission line in the directional coupler coupled to the first transmission line is connected to the filter, the signal output end of the filter is connected to the signal conversion module, the signal output end of the signal conversion module is connected to the state monitoring module, the state monitoring is connected to the background communication through the communication module; the state monitoring module is connected to the controller; The method comprises the following steps: In response to a preset wake-up condition being met, the controller wakes up the status monitoring module and the communication module in a dormant state, so that the low-power passive indoor status monitoring device enters a normal working mode; In normal working mode, the directional coupler collects the radio frequency power signal in the feeder of the corresponding indoor antenna, transmits the radio frequency power signal to the signal conversion module through the filter, and the signal conversion module converts the radio frequency power signal into a voltage signal; The status monitoring module collects the voltage signal output by the signal conversion module, and determines an abnormality detection result of the indoor antenna based on the voltage signal, determines status detection information of the indoor antenna based on the abnormality detection result, and uploads the status detection information of the indoor antenna to the backend through the communication module; The backend receives the status detection result of the indoor antenna, and determines the power detection result of the DAS system based on the status detection result of the indoor antenna.

2. The low-power passive indoor status monitoring method according to claim 1, characterized in that: The controller wakes up the status monitoring module and the communication module in a dormant state in response to a preset wake-up condition being met, so that the low-power passive indoor status monitoring device enters a normal working mode, including: In response to reaching a preset wake-up time, the controller sends a first wake-up signal to the state monitoring module to wake up the state monitoring module in a dormant state, and the state detection module wakes up the communication module; and / or, In response to receiving the target wake-up instruction, the controller sends a first wake-up signal to the state monitoring module to wake up the state monitoring module in the dormant state, and the state detection module wakes up the communication module.

3. The low-power passive indoor status monitoring method according to claim 1, characterized in that: The method further comprises: After the status monitoring module uploads the status detection information of the indoor antenna to the background through the communication module, the status monitoring module controls the communication module to enter the sleep state in response to meeting the preset sleep condition, and the status monitoring module enters the sleep state.

4. The low-power passive indoor status monitoring method according to claim 3, characterized in that: After the status monitoring module uploads the status detection information of the indoor antenna to the backend through the communication module, the status monitoring module and the communication module control the communication module to enter a sleep state in response to meeting a preset sleep condition, and the status monitoring module enters a sleep state, including: When the status monitoring module in normal working mode receives the interaction information returned by the background, and / or the number of times the status detection information is repeatedly uploaded without receiving the returned response information reaches a preset number threshold, the communication module is controlled to enter the sleep state after waiting for a preset timeout period; The status monitoring module enters a dormant state; The interaction information includes: response information returned by the background in response to the status detection information, and a setting instruction sent by the background.

5. The low-power passive indoor status monitoring method according to claim 1 or 4, characterized in that: The state monitoring module uploads the state detection information of the indoor antenna to the backend through the communication module, including: The status monitoring module determines whether a response message returned by the background in response to the status detection information is received; If not, the status monitoring module uploads the status detection information of the indoor antenna to the background again through the communication module, and determines again whether the response information returned by the background for the status detection information uploaded this time is received.

6. The low-power passive indoor status monitoring method according to claim 5, characterized in that: The method further comprises: After the status monitoring module determines that it has received the response information returned by the background in response to the status detection information, the status monitoring module waits within a preset setting time to see whether it has received a setting instruction sent by the background; If yes, the status monitoring module processes and stores the setting instruction, and sends a setting signal to the controller, so that the controller updates the preset wake-up condition based on the setting signal.

7. The low-power passive indoor status monitoring method according to claim 6, characterized in that: The method further comprises: The backend detects that the data transmission rate in the target area is lower than a preset rate threshold, and / or the disconnection frequency is greater than a preset frequency threshold, and / or the number of user complaints regarding signal quality is greater than a preset complaint threshold, and generates a setting instruction for the low-power passive indoor status monitoring device in the target area; After receiving the status detection information, the background sends the setting instruction to the status monitoring module of the low-power passive indoor status monitoring device in the target area.

8. The low-power passive indoor status monitoring method according to claim 1 or 4, characterized in that: The low-power passive indoor state monitoring device further includes a power supply module, which includes a power supply, a voltage conversion circuit, and a battery sampling circuit; the voltage output end of the power supply is connected to the voltage conversion circuit, and the output end of the voltage conversion circuit supplies power to the low-power passive indoor state monitoring device; the sampling end of the battery sampling circuit is connected to the voltage output end of the battery, and the output end of the battery sampling circuit is connected to the battery sampling end of the state monitoring module. A switch circuit is provided between the sampling end and the output end of the battery sampling circuit, and the switch circuit is connected to the switch control end of the state monitoring module; The method further comprises: In response to a preset wake-up condition being met, the controller wakes up the state monitoring module in a dormant state, and the state monitoring module controls the switch circuit to be turned on, and collects the power state signal of the power supply module through the battery sampling circuit; In response to a preset sleep condition being met, the state monitoring module enters a sleep state and controls the switch circuit to be turned off.

9. The low-power passive indoor status monitoring method according to claim 1, characterized in that: The low-power passive indoor status monitoring device collects the radio frequency power signal in the feeder of the corresponding indoor antenna through a directional coupler, transmits the radio frequency power signal to the signal conversion module through a filter, and the signal conversion module converts the radio frequency power signal into a voltage signal, including: Collecting a radio frequency power signal in a feeder line of the indoor antenna through the first transmission line of the directional coupler, coupling the radio frequency power signal to a second transmission line, and transmitting the radio frequency power signal to a filter through the second transmission line; The filter filters the radio frequency power signal, obtains the filtered radio frequency power signal and sends it to the signal conversion module; The signal conversion module converts the filtered radio frequency power signal into a voltage signal.

10. A low-power passive indoor status monitoring system, characterized in that: The low-power passive indoor status monitoring system includes a low-power passive indoor status monitoring device and a background. The low-power passive indoor status monitoring device and the indoor antenna in the DAS system are correspondingly arranged; the low-power passive indoor status monitoring device includes a directional coupler, a filter, a signal conversion module, a status monitoring module, a communication module and a controller; the first transmission line of the directional coupler is connected in series to the feeder of the indoor antenna, the second transmission line in the directional coupler coupled to the first transmission line is connected to the filter, the signal output end of the filter is connected to the signal conversion module, the signal output end of the signal conversion module is connected to the status monitoring module, and the status monitoring is connected to the background through the communication module; the status monitoring module is connected to the controller; The controller is configured to wake up the status monitoring module and the communication module in a dormant state in response to a preset wake-up condition being met, so as to enable the low-power passive indoor status monitoring device to enter a normal working mode; In normal working mode, the directional coupler collects the radio frequency power signal in the feeder of the corresponding indoor antenna, transmits the radio frequency power signal to the signal conversion module through the filter, and the signal conversion module converts the radio frequency power signal into a voltage signal; The state monitoring module is used to collect the voltage signal output by the signal conversion module, and determine the abnormality detection result of the indoor antenna based on the voltage signal, determine the state detection information of the indoor antenna based on the abnormality detection result, and upload the state detection information of the indoor antenna to the backend through the communication module; The backend is used to receive the status detection result of the indoor antenna and determine the power detection result of the DAS system based on the status detection result of the indoor antenna.

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