Passive indoor distribution monitoring system and method

Abstract

The invention discloses a passive indoor distribution monitoring system and method, and relates to the field of network monitoring. The passive indoor distribution monitoring system comprises an indoor distribution monitoring network management platform, a radio frequency identification (RFID) gateway, a combiner and an RFID tag, a first end of the combiner is connected with output ends of a plurality of information sources, a second end of the combiner is connected with the RFID gateway, and a third end of the combiner is connected with a feed network of an indoor distribution system; the RFID tags are arranged on antennas at the tail end of the feed network; and the indoor distribution monitoring network platform is connected with the RFID gateway.

Description

Technical Field

[0001] The present application relates to the field of network monitoring, and in particular to a passive indoor monitoring system and method. Background Art

[0002] Statistics show that more than 70% of data services occur indoors, and customers spend 80% of their working time indoors. The importance of indoor wireless network coverage is becoming increasingly prominent. Passive indoor distribution is the mainstream solution for indoor coverage due to its unique advantages of low construction and operation costs, wide frequency range support, and multi-operator and multi-system sharing.

[0003] However, due to the large number of passive devices and antenna nodes in passive indoor distribution, the complex distribution network and the inability to monitor itself, there have long been problems such as difficulty in fault detection, fault location, fault supervision and coverage analysis. Summary of the invention

[0004] The embodiments of the present application provide a passive indoor monitoring system and method to solve the problem of difficulty in discovering and locating passive indoor faults in the related art.

[0005] In a first aspect, an embodiment of the present application provides a passive indoor monitoring system, including: an indoor monitoring network management platform, a radio frequency identification RFID gateway, a combiner and an RFID tag, The first end of the combiner is connected to the output ends of multiple signal sources, the second end of the combiner is connected to the RFID gateway, and the third end of the combiner is connected to the feeder network of the indoor distribution system; The RFID tag is arranged on each antenna at the end of the feeding network; The indoor monitoring network platform is connected to the RFID gateway; Among them, during the monitoring process, the indoor monitoring network platform sends a monitoring instruction to the RFID gateway, and the RFID gateway sends a detection signal to the feeding network of the indoor system through the combiner. When the RFID tag set on each antenna at the end of the feeding network receives the detection signal, it sends a signal carrying its own identification code to the RFID gateway. The RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform, and the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag.

[0006] In a second aspect, an embodiment of the present application provides a passive indoor monitoring method, which is applied to a passive indoor monitoring system, wherein the passive indoor monitoring system includes an indoor monitoring network management platform, a radio frequency identification RFID gateway, a combiner and an RFID tag, and the method includes: During the monitoring process, the indoor monitoring network platform sends monitoring instructions to the RFID gateway; The RFID gateway sends a detection signal to the feeder network of the indoor distribution system through the combiner; When the RFID tag provided on each antenna at the end of the feeding network receives the detection signal, the RFID tag sends a signal carrying its own identification code to the RFID gateway; The RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform; The indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag.

[0007] In an embodiment of the present application, the passive indoor monitoring system includes an indoor monitoring network management platform, a radio frequency identification RFID gateway, a combiner and an RFID tag, wherein the first end of the combiner is connected to the output end of multiple sources, the second end of the combiner is connected to the RFID gateway, and the third end of the combiner is connected to the feeder network of the indoor system; the RFID tag is set at each antenna at the end of the feeder network; the indoor monitoring network platform is connected to the RFID gateway; wherein, during the monitoring process, the indoor monitoring network platform issues a monitoring instruction to the RFID gateway, the RFID gateway sends a detection signal to the feeder network of the indoor system through the combiner, and when the RFID tags set on each antenna at the end of the feeder network receive the detection signal, the signal carrying its own identification code is sent to the RFID gateway, and the RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform, and the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag. By deploying a sub-monitoring network management platform, a radio frequency identification RFID gateway and an RFID tag, the embodiment of the present application can timely discover abnormalities in the indoor system, and guide maintenance personnel to accurately locate and handle faults, thereby improving the efficiency of fault handling. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 is a structural diagram of a passive indoor monitoring system provided in an embodiment of the present application; Figure 2-6 It is a specific networking diagram of the passive indoor monitoring system provided in the embodiment of the present application; Figure 7 is a flow chart of a passive room monitoring method provided by an embodiment of the present application; Figure 8 It is a schematic diagram of fault determination provided in an embodiment of the present application. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0010] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, the "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0011] The following is combined with Figures 1 to 8 , a passive indoor monitoring system and method provided in an embodiment of the present application are described in detail through specific embodiments and application scenarios.

[0012] like Figure 1 As shown in FIG. 1 , it is a structural diagram of a passive indoor monitoring system provided in an embodiment of the present application. Figure 1 As shown, the passive indoor monitoring system may include: an indoor monitoring network management platform, a radio frequency identification RFID gateway, a combiner and an RFID tag.

[0013] Among them, the first end of the combiner is connected to the output ends of multiple signal sources, the second end of the combiner is connected to the RFID gateway, and the third end of the combiner is connected to the feeding network of the indoor distributed system; the RFID tags are set on each antenna at the end of the feeding network; the indoor distributed monitoring network platform is connected to the RFID gateway.

[0014] Among them, during the monitoring process, the indoor monitoring network platform sends monitoring instructions to the RFID gateway, and the RFID gateway sends a detection signal to the feeding network of the indoor system through the combiner. When the RFID tags installed on each antenna at the end of the feeding network receive the detection signal, they will send the signal carrying their own identification code to the RFID gateway. The RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform, and the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag.

[0015] It should be noted that the connection between the indoor monitoring network platform and the radio frequency identification (RFID) gateway can be a wireless communication connection or a wired communication connection. The specific connection method depends on the actual application and is not limited in this embodiment. It is worth noting that the RFID gateway can be installed in the same weak current room as the signal source, which is convenient for power supply, wireless backhaul and later maintenance. The selection of the RFID gateway is closely related to the number of multi-input and one-output combiners or multi-system access platforms (Point Of Interface, POI) and their output ports at the installation location of the signal source. That is to say, when the passive indoor monitoring system is deployed, a new RFID gateway is added near the signal source, a new combiner is added to the multi-input and one-output combiner of the original indoor distribution system or the back end of the POI (the telecom CDMA800 port of the POI can also be directly used) to connect to the RFID gateway, an RFID tag is attached to the antenna (mushroom head) of the indoor distribution system, and a unified indoor monitoring network management platform is deployed, which is specifically described in detail in the subsequent embodiments.

[0016] In this embodiment, RFID (840-845MHz) radio frequency identification technology is adopted. The indoor monitoring network management platform sends monitoring instructions to the RFID gateway. The RFID gateway sends a detection signal, which enters the RF indoor system through the RFID combiner and is transmitted to the antenna at the end of each link. The RFID tag on the antenna side receives the electromagnetic field energy transmitted from the RFID gateway and converts the energy into radio frequency energy, which is converted into electrical energy through detection. When the power received by the RFID tag reaches the activation threshold, it will follow the ISO18000-6C protocol command to send a signal carrying its own identification code (EPC code) to the gateway. The gateway calculates the link loss of the link based on its own transmission power and the activation power of the RFID tag. When the link loss is greater than the alarm threshold, an alarm is triggered.

[0017] This embodiment can monitor the fluctuation of wireless network signals, and reasonably set alarm triggering thresholds in combination with the coverage index requirements of operators for each system. When the triggering conditions are met, an alarm is reported to realize the monitoring of wireless signals.

[0018] The RFID gateway in this embodiment is a terminal that can collect indoor network monitoring information by reading RFID tags, collect and organize information such as the ID number of the RFID tag, communicate with the indoor monitoring network management platform through the network, report monitoring data, and receive query, configuration and other information and operations of the indoor monitoring network management platform. The indoor monitoring network management platform obtains the most basic data through the RFID gateway. RFID gateways can be divided into 1-port RFID gateways, 2-port RFID gateways and 4-port RFID gateways according to the number of RF output ports; they can be divided into fixed RFID gateways and portable RFID gateways according to mobility characteristics. The RFID gateway transmits RFID scanning frequency signals according to the preset polling cycle. After the RFID tag on the antenna side is activated, it will transmit the same frequency signal after being activated, and reach the RFID gateway through the same route. The RFID gateway calculates the link loss value through an algorithm and forwards it to the network management to realize the monitoring of the passive indoor system.

[0019] RFID tags are passive radio frequency tags that are attached to the surface or inside of the indoor antenna shell and can be read by the RFID gateway through the radio feed network. The indoor monitoring system recognizes the antenna by returning the ID number of the RFID tag, activates the electronic circuit chip on the tag through electromagnetic induction, realizes information collection and response, and detects the online and offline status of the antenna and link loss.

[0020] The passive indoor monitoring network management platform is a monitoring center that centrally manages indoor monitoring RFID readers. The southbound communication follows the indoor monitoring communication protocol. By collecting and processing the signal volume reported by the RFID reader, it determines the real-time status of the indoor antenna system, realizes graphical display, and remotely controls, adjusts parameters, and upgrades the firmware of the RFID reader. It interacts with the operation and maintenance monitoring system in the northbound direction and reports the performance and alarm data of the RFID reader and indoor antenna.

[0021] In an embodiment of the present application, the passive indoor monitoring system includes an indoor monitoring network management platform, a radio frequency identification RFID gateway, a combiner and an RFID tag, wherein the first end of the combiner is connected to the output end of multiple sources, the second end of the combiner is connected to the RFID gateway, and the third end of the combiner is connected to the feeder network of the indoor system; the RFID tag is set at each antenna at the end of the feeder network; the indoor monitoring network platform is connected to the RFID gateway; wherein, during the monitoring process, the indoor monitoring network platform issues a monitoring instruction to the RFID gateway, the RFID gateway sends a detection signal to the feeder network of the indoor system through the combiner, and when the RFID tags set on each antenna at the end of the feeder network receive the detection signal, the signal carrying its own identification code is sent to the RFID gateway, and the RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform, and the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag. By deploying a sub-monitoring network management platform, a radio frequency identification RFID gateway and an RFID tag, the embodiment of the present application can timely discover abnormalities in the indoor system, and guide maintenance personnel to accurately locate and handle faults, thereby improving the efficiency of fault handling.

[0022] In a possible implementation manner of the present application, the combiner includes a room division combiner and a monitoring combiner.

[0023] Among them, the first end of the indoor division combiner is connected to multiple signal sources, the second end of the indoor division combiner is connected to the first end of the monitoring combiner, the second end of the monitoring combiner is connected to the RFID gateway, and the third end of the monitoring combiner is connected to the indoor division feeding network.

[0024] That is to say, the combiner may include the original combiner in the related art, or may include the original combiner and the monitoring combiner, wherein the monitoring combiner is connected to the port of the RFID gateway.

[0025] Among them, for the scenario where POI is used and POI supports Telecom CDMA800MHz port, if Telecom CDMA800MHz port is idle and there is no need to feed it later, the output signal of RFID gateway can be directly fed into Telecom CDMA800MHz port, that is, there is no need to monitor the combiner, and the number of ports of RFID gateway and the number of POI can be kept consistent, as shown below. Figure 2 shown.

[0026] It should be noted that the monitoring combiner should be placed in the same position as the multi-input and one-output combiner or POI of the indoor distributed system as much as possible, so as to better integrate with the original combiner. The insertion loss requirement from the public network signal source input port to the output port of the passive indoor distributed monitoring combiner for the 820~835MHz frequency band is no more than 1.5dB, and the insertion loss requirement for other frequency bands is no more than 0.8dB; the insertion loss requirement from the RFID input port to the output port of the passive indoor distributed monitoring combiner is no more than 1.5dB; taking the public network signal source as the starting point, the passive indoor distributed monitoring combiner should be placed at the back end of the multi-input and one-output combiner or POI of the public network, that is, the public network signal source input port of the passive indoor distributed monitoring combiner is connected to the multi-input and one-output combiner or POI output port of the public network, and the RFID signal input port of the passive indoor distributed monitoring combiner is connected to the RFID signal input port of the passive indoor distributed monitoring combiner. Connected to the output port of the RFID gateway, the output port of the dedicated passive indoor monitoring combiner is connected to the antenna feeder part; if the telecom CDMA800MHz port of the POI is idle and available, or there is a multi-input and one-output public network combiner that supports the RFID frequency band (840~845MHz), the output port of the RFID gateway can be directly connected to the telecom CDMA800 port of the POI or the RFID input port of the multi-input and one-output public network combiner, without adding a dedicated passive indoor monitoring combiner; the power tolerance of the dedicated passive indoor monitoring combiner must meet the maximum power requirements of the system; the frequency band of the public network signal source input port of the dedicated passive indoor monitoring combiner must meet the public network frequency band requirements.

[0027] The monitoring combiner is a cavity component that feeds the RFID gateway's national standard frequency (840~845MHz) RF signal into the indoor distribution feeding network and has no adverse effects on the original communication signal. The monitoring combiner is used to combine the operator's public network system signal and the RFID gateway transmission signal. Each signal coexists in the same DAS indoor distribution antenna feeder to achieve synchronous transmission and reception.

[0028] In a possible implementation manner of the present application, the indoor splitter combiner is a multi-system access platform POI combiner or a multiple-input-one-output combiner.

[0029] In a possible implementation manner of the present application, the number of ports of the RFID gateway is related to at least one of the following: the number of coverage areas of the indoor distributed system; and the type of combiner.

[0030] For a single-channel indoor distribution system, a multi-input and one-output combiner is used for combining. A 1-port RFID gateway can be selected. The network diagram is as follows: Figure 3 shown.

[0031] For a single-channel indoor distribution system, POI is used for combining. Different branches cover different areas. A 2-port RFID gateway can be selected. The network diagram is as follows: Figure 4 shown.

[0032] For a dual-channel indoor distribution system, two multiple-input and one-output combiners are used. The branches of the two combiners are A and B. A 2-port RFID gateway can be selected. The network diagram is as follows: Figure 5 shown.

[0033] For a dual-channel indoor distribution system, a 4-port RFID gateway can be selected for the scenario where POI is used for combining channels. The network diagram is as follows: Figure 6 shown.

[0034] If the signal source in the same weak current room involves more than 4 output links after combining, the 4-port RFID gateway can be used first, and then the 1-port RFID gateway or 2-port RFID gateway can be determined based on the number of output ports of the remaining multi-input and one-output combiner or POI.

[0035] For scenarios where POI is used and POI supports Telecom CDMA800MHz port, if Telecom CDMA800MHz port is idle and there is no need to feed it later, the output signal of RFID gateway can be directly fed into Telecom CDMA800MHz port. The number of ports of RFID gateway and the number of POI can be kept consistent. The network diagram is as follows: Figure 2 shown.

[0036] Each port of the RFID gateway is designed to support a maximum link loss range of 36dB. Considering the 3dB application margin, the maximum link loss from the port to the terminal antenna is recommended to be no higher than 33dB in principle.

[0037] Within the effective chain loss detection range of the RFID gateway, each port of the RFID gateway can carry a maximum of 100 antenna tag sensors, that is, 100 pairs of antennas.

[0038] The RFID gateway communication mode is divided into wired communication mode and wireless communication mode. The wired communication mode needs to provide a network port that can reliably connect to the network management server for the RFID gateway. The wireless communication mode needs to ensure that the public network 4G signal at the RFID gateway installation location is ≧-80dBm.

[0039] For single-channel indoor distributed systems, it is expected that there will be a need for dual-channel transformation, and branches may be added in the future. The ports of the RFID gateway can be appropriately reserved based on the actual situation.

[0040] In a possible implementation of the present application, when the number of ports of the RFID gateway is multiple, the same port, the number of the antenna corresponding to the same port, and the number of the RFID tag are in a corresponding mapping relationship. When the number of ports of the RFID gateway is multiple, the number of the antenna corresponding to the same port is unique.

[0041] That is to say, the numbers of devices, antennas, etc. on the same floor under the same RFID gateway must remain unique, and no duplicate numbers are allowed. The numbers of devices, antennas, etc. in the system diagram and the floor plan must maintain a one-to-one mapping relationship.

[0042] In a possible implementation of the present application, the types of RFID tags correspond to the number of areas covered by the indoor distribution system.

[0043] In other words, to distinguish between single and double paths of the indoor distributed system, the dual-polarized antenna can use two types of tags to detect each link to avoid confusion.

[0044] Among them, the RFID tag should be designed on the terminal antenna cover. In order to ensure that the design chain loss of the antenna point does not exceed the chain loss support range of the RFID gateway, the design chain loss of the antenna point can be measured. It is recommended that the chain loss should not exceed 33dB in principle. The specific method can refer to the 900M GSM frequency band or CDMA frequency band to calculate the terminal antenna port power. When the source power is 40dBm, the calculated power value of the terminal antenna port should not be less than 0dBm.

[0045] The room-monitored RFID tag in this application adopts wafer plastic packaging, adds filters and matching circuits, adopts flexible printed circuit board design and electronic device SMT (Surface Mount Technology) surface mounting technology, which can effectively solve the impact of room-monitored interference on detection accuracy.

[0046] In a possible implementation of the present application, the passive indoor monitoring system may further include an antenna detector, and the antenna detector is arranged within a preset range of a preset antenna.

[0047] Among them, the antenna detector is used to periodically monitor the wireless network signal and transmit the wireless network signal to the indoor monitoring network management platform, so that the indoor monitoring network management platform can detect whether the network signal is abnormal based on the wireless network signal.

[0048] That is to say, for key areas or key locations that need to be monitored, an antenna detector is installed, and the terminal ID of the antenna detector is bound and matched with information such as the signal source, antenna, and installation location.

[0049] The antenna detector installed near the terminal antenna has a built-in dedicated frequency sweep chip, which periodically monitors the field strength of the wireless network signal at the location (it can perform frequency and power sweep monitoring on multiple frequency band signals working in the indoor distribution system), and reports the monitoring results to the background detection platform through the communication module of the antenna detector for analysis and problem identification. Through the regular (day / N days / week) information linkage between the background and the front desk, it is determined whether the network signal is normal. Limited by the chip capacity and cost, the current analog frequency sweep products can only realize the demodulation of 4G signals, and 5G signals only detect the total power of the received frequency band.

[0050] In this embodiment, the antenna detector can collect various data such as frequency band number, operator, frequency band, frequency point, signal receiving power and cell ID. The data dimensions are relatively rich, and it can issue alarms for indoor distributed system operation conditions such as signal abnormalities and signal on and off.

[0051] like Figure 7 As shown in FIG. 1 , it is a flow chart of a passive room monitoring method provided by an embodiment of the present application. Figure 7 As shown, the passive indoor monitoring method may include: the contents shown in steps S701 to S705.

[0052] In S701, during the monitoring process, the indoor monitoring network platform sends a monitoring instruction to the RFID gateway.

[0053] In S702, the RFID gateway sends a detection signal to the feeding network of the indoor distributed system through a combiner.

[0054] In S703, when the RFID tag installed on each antenna at the end of the feeding network receives the detection signal, it sends a signal carrying its own identification code to the RFID gateway.

[0055] In S704, the RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform.

[0056] In S705, the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag.

[0057] In the embodiment of the present application, during the monitoring process, the indoor monitoring network platform sends a monitoring instruction to the RFID gateway, and the RFID gateway sends a detection signal to the feeder network of the indoor system through the combiner. When the RFID tags set on each antenna at the end of the feeder network receive the detection signal, they send a signal carrying their own identification code to the RFID gateway. The RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform, and the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag. By deploying a sub-monitoring network management platform, a radio frequency identification RFID gateway, and an RFID tag, the embodiment of the present application can timely discover anomalies in the indoor system, and guide maintenance personnel to accurately locate and handle faults, thereby improving fault handling efficiency.

[0058] In a possible implementation of the present application, the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag, which may include: the indoor monitoring network platform performs abnormality judgment based on the signal sent by the RFID tag, and the abnormality includes a single antenna failure, a device or a feeder failure; in the case of an abnormality in the signal of a single antenna, the position of the single antenna is located based on the signal sent by the RFID tag; in the case of an abnormality in the signal of multiple antennas, it is determined that the device or feeder is faulty.

[0059] That is to say, this embodiment can combine the active alarm reporting and push of faults to achieve rapid fault location. At the same time, online query of indoor assets can be performed to avoid asset loss or failure. By deploying a passive indoor monitoring system, the network status of each operator can be collected to determine whether the network signal is abnormal or interrupted.

[0060] In this embodiment, Figure 8 As shown in the figure, by deploying a passive indoor monitoring system, the indoor system alarm can be discovered in time, and maintenance personnel can be guided to accurately troubleshoot and rectify faults. The feasibility of RFID passive indoor monitoring technology is verified, and the indoor alarm detection capability and fault handling effect are verified.

[0061] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and system in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0062] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0063] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A passive indoor monitoring system, characterized in that: include: Indoor monitoring network management platform, RFID gateway, combiner and RFID tag, The first end of the combiner is connected to the output ends of multiple signal sources, the second end of the combiner is connected to the RFID gateway, and the third end of the combiner is connected to the feeder network of the indoor distribution system; The RFID tag is arranged on each antenna at the end of the feeding network; The indoor monitoring network platform is connected to the RFID gateway; Among them, during the monitoring process, the indoor monitoring network platform sends a monitoring instruction to the RFID gateway, and the RFID gateway sends a detection signal to the feeding network of the indoor system through the combiner. When the RFID tag set on each antenna at the end of the feeding network receives the detection signal, it sends a signal carrying its own identification code to the RFID gateway. The RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform, and the indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag.

2. The system according to claim 1, characterized in that The combiner includes a room-dividing combiner and a monitoring combiner. The first end of the indoor division combiner is connected to the multiple signal sources, the second end of the indoor division combiner is connected to the first end of the monitoring combiner, the second end of the monitoring combiner is connected to the RFID gateway, and the third end of the monitoring combiner is connected to the indoor division feeding network.

3. The system according to claim 2, characterized in that The indoor splitter combiner is a multi-system access platform POI combiner or a multi-input one-output combiner.

4. The system according to claim 1, characterized in that The number of ports of the RFID gateway is related to at least one of the following: The number of areas covered by the indoor distribution system; The type of the combiner.

5. The system according to claim 1, characterized in that In the case that the RFID gateway has multiple ports, the same port, the number of the antenna corresponding to the same port, and the number of the RFID tag are in a corresponding mapping relationship.

6. The system according to claim 1, characterized in that When the RFID gateway has multiple ports, the antenna numbers corresponding to the same port are unique.

7. The system according to claim 1, characterized in that The types of the RFID tags correspond to the number of areas covered by the indoor distribution system.

8. The system according to claim 1, characterized in that The system further includes an antenna detector, wherein the antenna detector is arranged within a preset range of a preset antenna. The antenna detector is used to periodically monitor wireless network signals and transmit the wireless network signals to the indoor monitoring network management platform, so that the indoor monitoring network management platform detects whether the network signal is abnormal based on the wireless network signal.

9. A passive indoor monitoring method, characterized in that: Applied to a passive indoor monitoring system, the passive indoor monitoring system includes an indoor monitoring network management platform, a radio frequency identification RFID gateway, a combiner and an RFID tag, and the method includes: During the monitoring process, the indoor monitoring network platform sends monitoring instructions to the RFID gateway; The RFID gateway sends a detection signal to the feeder network of the indoor distribution system through the combiner; When the RFID tag provided on each antenna at the end of the feeding network receives the detection signal, the RFID tag sends a signal carrying its own identification code to the RFID gateway; The RFID gateway sends the signal sent by the RFID tag to the indoor monitoring network platform; The indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag.

10. The method according to claim 9, characterized in that The indoor monitoring network platform performs passive indoor monitoring based on the signal sent by the RFID tag, including: The indoor monitoring network platform makes an abnormality judgment based on the signal sent by the RFID tag, and the abnormality includes a single antenna failure, a device or a feeder failure; In the case where a signal of a single antenna is abnormal, locating the position of the single antenna based on the signal sent by the RFID tag; When the signals from multiple antennas are abnormal, it is determined that the device or feeder is faulty.

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