A method and device for detecting indoor antenna signal quality

Abstract

The present invention discloses a method and device for detecting the signal quality of a room-divided antenna. In order to solve the problems that different room-divided antenna monitoring in the prior art requires additional replacement or upgrade of chips and cannot provide full coverage, the antenna signal frequency is scanned by a frequency scanner, and the scanning result is transmitted to the cloud through a room-divided antenna monitor. A method for detecting the signal quality of a room-divided antenna is adopted. The room-divided antenna monitor scans the entire frequency band. After the first scan, a periodic optimal signal frequency band scan is set, and data and events are recorded according to different scanning results. The cloud receives the frequency band recorded data and events reported by the room-divided antenna monitor, and classifies and analyzes them according to different scanning conditions to obtain the signal quality change of the room-divided system. The present invention does not limit the antenna format and has a wide range of applications.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communications, and in particular relates to a method and device for detecting indoor antenna signal quality. Background Art

[0002] Indoor distribution system, referred to as indoor distribution system, refers to a signal coverage method that introduces cellular wireless base station signals into the room to solve the problem of indoor blind area coverage. The indoor distribution system mainly consists of two parts: signal source and distribution system. The function of the signal source is to amplify or directly provide base station signals, and to amplify the uplink signals transmitted to the base station. The main function of the distribution system is to evenly distribute the signal from the signal source to the area to be covered. The distribution system mainly includes feeder, leakage cable, coupler, power divider and indoor distribution antenna.

[0003] The indoor coverage of the indoor distributed system is generally a combination of multiple standard systems. In the 4G era, it is a combination of 4G and 3G / 2G / WLAN, and in the 5G era, it is a combination of 4G and 5G. Indoor distributed antennas also have single-frequency, dual-frequency and multi-frequency types. In the combined system, the difference in frequency bands leads to inconsistent performance of signals in feeder transmission loss, spatial propagation and shielding loss, affecting the performance of the synchronous coverage of the two. Therefore, the failure of the indoor distributed system is concentrated on two types of problems: signal coverage and excessive noise floor. Signal coverage problems will cause high transmission power of wireless terminals, and excessive noise floor will cause damage to terminal transmission performance. Therefore, real-time signal quality monitoring of the indoor distributed system is necessary, and the common monitoring method is to monitor the indoor distributed antenna. The indoor distributed antenna monitor is attached close to the indoor distributed antenna terminal and monitors the quality of the wireless signal, and transmits the detection results back to the nearest antenna through a wireless link to form a link loss detection loop.

[0004] The existing idea of ​​indoor antenna signal quality monitoring is to use baseband chips that support the corresponding standards, obtain corresponding synchronization signals, perform signal quality monitoring and corresponding gain adjustment. There is a need for an indoor antenna monitor that does not require upgrading baseband chips and is applicable to all standards to meet the needs of indoor system deployment and upgrade.

[0005] Publication (announcement) number: CN209375679U, Publication (announcement) date: 2019-09-10 It relates to a real-time clock update system, including: a power module, a real-time clock module, a control module, an Ethernet interface module and an instrument module, the real-time clock module and the control module are electrically connected to the power module respectively, the real-time clock module, the Ethernet interface module and the instrument module are respectively communicated with the control module, and the Ethernet interface module is configured to communicate with an external terminal module; the power module is used to output power supply to the real-time clock module and the control module, the Ethernet interface module is used to receive the first clock information of the external terminal module and transmit the first clock information to the control module, the instrument module is used to provide the second clock information to the control module, and the control module transmits the first clock information and the second clock information to the real-time clock module. This patent does not perform failure monitoring and fault diagnosis on the timing accuracy of the RTC clock. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art that different indoor antenna monitoring requires additional replacement or upgrade of chips and cannot provide full coverage, and to provide a full-standard indoor antenna signal quality detection method and device that does not limit the indoor antenna standard and has a simple process.

[0007] In order to achieve the above object, the present invention provides the following technical solution: a method for detecting the signal quality of a room antenna, characterized in that it comprises the following steps:

[0008] S1: Install indoor antenna monitor and scan the full frequency band;

[0009] S2: After the first scan, set the periodic optimal signal frequency band scan and record data and events according to different scan results;

[0010] S3: The cloud receives the frequency band record data and events reported by the indoor antenna monitor, classifies and analyzes them according to different scanning conditions, and obtains the signal quality changes of the indoor system.

[0011] Preferably, the steps of step S1 include:

[0012] S11: Record the optimal frequency band signal and the corresponding signal power, record the signal power scanned this time as the no-load power of the frequency band, and report the frequency band opening event to the cloud;

[0013] S12: Record other frequency band signals and their corresponding signal powers, aggregate them into a set, and report them to the cloud.

[0014] Preferably, the classification of the scanning results in step S2 includes:

[0015] The optimal frequency band detected three times in a row was Bx;

[0016] The optimal signal frequency band is By for three consecutive times, and By belongs to the mid-band signal set of S12;

[0017] The optimal signal frequency band is By for three consecutive times, and By does not belong to the frequency band signal set of S12;

[0018] The optimal frequency bands detected three times in a row are different.

[0019] Preferably, when the scanning result of step S2 is that the optimal frequency band detected three times in a row is Bx, they are all recorded as the non-no-load signal power of frequency band Bx, and the average value of the three optimal signal powers of frequency band Bx is used as the non-no-load signal power reference value of frequency band Bx.

[0020] Preferably, when the scanning result of step S2 is that the optimal signal frequency band is detected to be By for three consecutive times, and By belongs to the frequency band signal set in S12:

[0021] A1: Record all results as the non-no-load signal power in frequency band By;

[0022] A2: The average value of the three optimal signal powers of the frequency band By is used as the non-no-load signal power reference value of the frequency band Bx;

[0023] A3: Lock the frequency and scan the frequency band Bx. If the frequency band Bx is scanned, the non-no-load signal power of the frequency band Bx is recorded. If the frequency band Bx is not scanned, the frequency band Bx closing event is reported to the cloud.

[0024] A4: Calculate whether the difference between the non-idle signal power of frequency band By and the non-idle signal power of frequency band Bx is less than a preset threshold. If so, report the frequency band Bx signal quality deterioration event to the cloud.

[0025] Preferably, when the scanning result of step S2 is that the optimal signal frequency band is detected to be By for three consecutive times, and By does not belong to the frequency band signal set in S12:

[0026] B1: Record the result as the no-load signal power in frequency band By;

[0027] B2: The average value of the three optimal signal powers of frequency band By is used as the non-no-load signal power reference value of frequency band By, and the frequency band By opening event is reported;

[0028] B3: Lock the frequency and scan the frequency band Bx. If the frequency band Bx is scanned, record the non-no-load signal power of the frequency band Bx. If the frequency band Bx cannot be scanned, report the frequency band Bx closing event to the cloud.

[0029] B4: Calculate whether the difference between the no-load signal power of frequency band By and the non-no-load signal power of frequency band Bx is less than a preset threshold. If so, report the frequency band Bx signal quality deterioration event to the cloud.

[0030] Preferably, when the scanning result of step S2 is that the optimal frequency band detected for three consecutive times is different, the frequency is locked and the frequency band Bx is scanned. If the frequency band Bx is scanned, the non-no-load signal power of the frequency band Bx is recorded, and it is calculated whether the difference between the initial value of the non-no-load signal power of the frequency band Bx in S12 and the current scanning value is less than a preset threshold. If so, the frequency band Bx signal quality deterioration event is reported to the cloud; if the frequency band Bx cannot be scanned, the frequency band Bx closing event is reported to the cloud.

[0031] Preferably, the set includes a frequency band set {Bx1, Bx2, ..., Bxn} and a bandwidth set {BWx1, BWx2, ..., BWxn}, and the frequency band set and the bandwidth set correspond to an idle signal power set {Rx1_idL, Rx2_idL, ..., Rxn_idL}.

[0032] Preferably, the scanning situation includes a frequency band opening event and its timestamp, and a frequency band closing event and its timestamp.

[0033] A device for detecting the signal quality of an indoor antenna comprises an indoor antenna monitor and a frequency scanner. The frequency scanner is installed on the indoor antenna monitor. The indoor antenna monitor comprises a memory and a processing unit. The indoor antenna monitor is connected to a cloud computer.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a method for monitoring the signal quality of indoor antennas, which can simultaneously monitor the signal quality of 4G and 5G indoor antennas. The method is not limited to the standard, as long as the signal power of the monitoring frequency band can be collected. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a flow chart of the method of the present invention.

[0036] Figure 2 It is a scanning classification flow chart of the present invention.

[0037] Figure 3 It is a module connection diagram of the device of the present invention. DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments described here are only part of the embodiments of the present invention, rather than all of the embodiments. The accompanying drawings only show the part related to this patent application, rather than all of the content. The scope of protection of the present invention is not limited to the following embodiments.

[0039] like Figure 1 As shown, a method for detecting the signal quality of a room antenna includes monitoring the wireless signal power value in no-load and non-no-load conditions, including but not limited to RSRP, RSSI, RSRQ, etc., depending on the baseband unit of the room antenna monitor to realize multiple signal quality collection, and judging the signal quality of the room antenna by periodically monitoring the no-load and non-no-load signal power changes, including the following steps:

[0040] S1: Install an indoor antenna monitor in the antenna signal coverage area, start the indoor antenna monitor, and scan the antenna signal in the full frequency band.

[0041] S11: Record the optimal frequency band signal and the corresponding signal power: frequency band Bx, bandwidth BWx and corresponding signal power Rx_idL, record the signal power scanned this time as the no-load power of frequency band Bx, and report the frequency band opening event to the cloud. The reporting time at this time is recorded as the frequency band opening event timestamp, so as to record the start of a detection task, and the cloud will summarize and process the detection tasks.

[0042] S12: Record other frequency band signals and the corresponding signal powers, and summarize the frequency band signals and signal powers into a set, which includes the frequency band set {Bx1, Bx2, ..., Bxn} and the bandwidth set {BWx1, BWx2, ..., BWxn}. The frequency band set and the bandwidth set correspond to the no-load signal power set {Rx1_idL, Rx2_idL, ..., Rxn_idL}. Report the set to the cloud and record it in the task record.

[0043] S2: After the first scan, set the periodic optimal signal frequency band scan, record data and events according to different scan results, and classify the scan results as follows: Figure 2 As shown, including:

[0044] The optimal frequency band detected three times in a row was Bx;

[0045] The optimal signal frequency band is By for three consecutive times, and By belongs to the mid-band signal set of S12;

[0046] The optimal signal frequency band is By for three consecutive times, and By does not belong to the frequency band signal set of S12;

[0047] The optimal frequency bands detected three times in a row are different.

[0048] Classification is performed based on different frequency band conditions. In condition 1, the antenna signal quality is normal. In condition 2, 3 or 4, the antenna signal quality may be deteriorating. The following analysis is performed based on the actual frequency band scanning conditions.

[0049] When the scanning result shows that the optimal frequency bands detected for three consecutive times are all Bx, they are all recorded as the non-no-load signal power of frequency band Bx: Rx_nidL_1, Rx_nidL_2, Rx_nidL_3. The average value Rx_nidL_ave of the three optimal signal powers of frequency band Bx is used as the non-no-load signal power reference value Rx_nidL_base_1 of frequency band Bx. When the three optimal frequency bands are all the initial frequency band set, it can be considered that the antenna signal quality is normal or good at this time. This scanning task is recorded, no error report is made, and the scanning task of the next cycle is carried out.

[0050] When the scan result shows that the optimal signal frequency band is By for three consecutive times, and By belongs to the mid-band signal set of S12:

[0051] A1: Record the results as the non-no-load signal power of the frequency band By: Ry_nidL_1, Ry_nidL_2, Ry_nidL_3;

[0052] A2: Use the average value Ry_nidL_ave of the three best signal powers of band By as the non-idle signal power reference value Ry_nidL_base_1 of band Bx, and record the average value Ry_nidL_ave in the suspected quality deterioration event in the cloud task record; A3: Lock the frequency and scan band Bx. If band Bx is scanned, record the non-idle signal power Rx_nidL_2 of band Bx in the cloud record. If band Bx is not scanned, report the closing event of band Bx to the cloud. The cloud task calls the historical closing record to determine whether it is an active closing. If it is not an active closing, record the antenna closing event and issue a warning;

[0053] A4: Calculate whether the difference between the non-no-load signal power Ry_nidL_1 of the frequency band By and the non-no-load signal power Rx_nidL_2 of the frequency band Bx is less than the preset threshold R_loss. If so, report the frequency band Bx signal quality deterioration event to the cloud, and the cloud task records this quality deterioration event in the task table.

[0054] When the scan result shows that the optimal signal frequency band is By for three consecutive times, and By does not belong to the frequency band signal set of S12:

[0055] B1: Record the result as the no-load signal power of frequency band By: Ry_nidL_1, Ry_nidL_2, Ry_nidL_3;

[0056] B2: The average value Ry_nidL_ave of the three optimal signal powers of frequency band By is used as the non-idle signal power reference value Ry_idL of frequency band By, and the average value Ry_nidL_ave is recorded in the suspected quality deterioration event in the cloud task record, and the frequency band By opening event is reported, and the frequency band opening event timestamp is recorded at this time;

[0057] B3: Lock the frequency and scan the frequency band Bx. If the frequency band Bx is scanned, the non-no-load signal power Rx_nidL_2 of the frequency band Bx is recorded. If the frequency band Bx cannot be scanned, the frequency band Bx closing event is reported to the cloud. The cloud task calls the historical closing record to determine whether it is an active closing. If it is not an active closing, the antenna closing event is recorded and a warning is issued;

[0058] B4: Calculate whether the difference between the no-load signal power Rx_nidL_1 of the frequency band By and the non-no-load signal power Rx_nidL_2 of the frequency band Bx is less than the preset threshold R_loss. If so, report the frequency band Bx signal quality deterioration event to the cloud.

[0059] When the scanning result shows that the optimal frequency band detected for three consecutive times is not the same, lock the frequency and scan the frequency band Bx. If the frequency band Bx is scanned, record the non-no-load signal power Rx_nidL_2 of the frequency band Bx, and calculate whether the difference between the initial value Rx_nidL_1 of the non-no-load signal power of the frequency band Bx in S12 and the current scan value Rx_nidL_2 is less than the preset threshold R_loss. If so, report the frequency band Bx signal quality deterioration event to the cloud, and the cloud task records this quality deterioration event in the task table; if the frequency band Bx cannot be scanned, report the frequency band Bx closing event to the cloud, and the cloud task calls the historical closing record to determine whether it is an active closure. If it is not an active closure, record the antenna closing event and issue a warning.

[0060] S3: The cloud receives the frequency band record data and events reported by the indoor antenna monitor, and classifies and analyzes them according to different scanning conditions. The scanning conditions include the frequency band opening event and its timestamp, the frequency band closing event and its timestamp, and obtains the signal quality change of the indoor system. According to the information in the cloud task table, the antennas with deteriorating quality or abnormal closure within the range are repaired.

[0061] like Figure 3 As shown, a device for detecting the signal quality of an indoor antenna includes an indoor antenna monitor and a frequency scanner. The frequency scanner is installed on the indoor antenna monitor. The indoor antenna monitor includes a memory and a processing unit. The indoor antenna monitor can rotate periodically at the installation point. The indoor antenna monitor communicates with a cloud computer. The cloud computer can record the data and timestamp of the indoor antenna monitor and feed back the information to the indoor antenna monitor.

[0062] After installing the indoor antenna monitor, start the frequency scanner for the first scan, and reset the frequency scanner according to the optimal frequency band in the first scan, and perform periodic optimal signal frequency band scanning again. According to the scanning results, it can be divided into four situations: the optimal frequency band detected three times in a row is Bx; the optimal signal frequency band detected three times in a row is By, and By belongs to the frequency band signal set; the optimal signal frequency band detected three times in a row is By, and By does not belong to the frequency band signal set; the optimal frequency band detected three times in a row is different. For the actual scanned power, the processing unit receives the information scanned by the frequency scanner and stores the scan results in the memory:

[0063] When the frequency scanner detects Bx as the optimal frequency band for three consecutive times, they are all recorded as the non-no-load signal power of frequency band Bx: Rx_nidL_1, Rx_nidL_2, and Rx_nidL_3. The processing unit calculates the average value Rx_nidL_ave of the three optimal signal powers of frequency band Bx, and uses the average value Rx_nidL_ave of the three optimal signal powers of frequency band Bx as the non-no-load signal power reference value Rx_nidL_base_1 of frequency band Bx.

[0064] When the frequency scanner detects that the optimal signal frequency band is By for three consecutive times, and By belongs to the frequency band signal set: the results are all recorded as the non-no-load signal power of frequency band By: Ry_nidL_1, Ry_nidL_2, Ry_nidL_3, the processing unit calculates the average value Rx_nidL_ave of the three optimal signal powers of frequency band Bx, and uses the average value Ry_nidL_ave of the three optimal signal powers of frequency band By as the non-no-load signal power reference value Ry_nidL_base_1 of frequency band Bx, the frequency scanner locks the frequency and scans frequency band Bx, if frequency band Bx is scanned, the non-no-load signal power Rx_nidL_2 of frequency band Bx is recorded and uploaded to the memory, and the memory transmits the result to the processing unit; if frequency band Bx cannot be scanned, the processing unit reports the frequency band Bx closing event to the cloud computer. The processing unit calculates whether the difference between the non-idle signal power Ry_nidL_1 of the frequency band By and the non-idle signal power Rx_nidL_2 of the frequency band Bx is less than a preset threshold R_loss. If so, the processing unit reports the frequency band Bx signal quality deterioration event to the cloud computer.

[0065] When the frequency scanner detects that the optimal signal frequency band is By for three consecutive times, and By does not belong to the frequency band signal set: the result is recorded as the no-load signal power of frequency band By: Ry_nidL_1, Ry_nidL_2, Ry_nidL_3, the processing unit calculates the average value Ry_nidL_ave of the three optimal signal powers of frequency band By, and uses the average value Ry_nidL_ave of the three optimal signal powers of frequency band By as the non-no-load signal power reference value Ry_idL of frequency band By, the processing unit reports the frequency band By opening event to the cloud computer, the frequency scanner locks the frequency and scans the frequency band Bx, if the frequency band Bx is scanned, the non-no-load signal power Rx_nidL_2 of the frequency band Bx is recorded and uploaded to the storage; if the frequency band Bx cannot be scanned, the processing unit reports the frequency band Bx closing event to the cloud computer. The processing unit calculates whether the difference between the idle signal power Rx_nidL_1 of the frequency band By and the non-idle signal power Rx_nidL_2 of the frequency band Bx is less than a preset threshold R_loss. If so, the processing unit reports the frequency band Bx signal quality deterioration event to the cloud computer.

[0066] When the frequency scanner detects different optimal frequency bands for three consecutive times, the frequency scanner locks the frequency and scans the frequency band Bx. If the frequency band Bx is scanned, the non-no-load signal power Rx_nidL_2 of the frequency band Bx is recorded and stored in the memory. The memory transmits the data to the processing unit. The processing unit calculates whether the difference between the initial value Rx_nidL_1 of the non-no-load signal power of the frequency band Bx in S12 and the current scan value Rx_nidL_2 is less than the preset threshold R_loss. If so, the processing unit reports the frequency band Bx signal quality deterioration event to the cloud computer; if the frequency band Bx cannot be scanned, the processing unit reports the frequency band Bx shutdown event to the cloud computer.

[0067] The cloud computer receives the frequency band record data and events reported by the indoor antenna monitor processing unit, and classifies and analyzes the frequency band opening events and their timestamps, the frequency band closing events and their timestamps to obtain the signal quality changes of the indoor system. In the frequency band opening event, the memory records the three optimal signal powers obtained by the frequency scanner for three consecutive scans and records them in the memory. The processing unit retrieves the data and calculates the non-idle signal power Rx_nidL_2 of the frequency band. For the no-load signal power Rx_nidL_1 of the frequency band and the non-idle signal power R The difference between x_nidL_2 and x_nidL_2 is less than the preset threshold R_loss for judgment. If the no-load signal power Rx_nidL_1 of the frequency band is less than the non-no-load signal power Rx_nidL_2 of the frequency band, it proves that the antenna signal quality has deteriorated. The timestamp at this moment is recorded in the memory, and the opening event and the result are uploaded to the cloud computer through the processing unit. In the event of frequency band closing, according to the frequency band closing timestamp, the coverage task list in the scheduling cloud computer is determined to determine whether it is manually closed. If it is not manually closed, the antenna may be damaged and needs to be repaired or replaced in time.

[0068] The present invention calculates the relative time deviation between the RTC real-time clock and the system clock, performs online monitoring and fault diagnosis on the RTC clock, enables the RTC real-time clock to respond to faults in time when failure or failure occurs, saves fault information and notifies the vehicle controller of the power fault light, thereby providing necessary guarantee for the normal operation of the BMS battery management system.

[0069] The technical solution, principle and advantages of the present invention are shown and described above. It should be pointed out that the present invention is not limited to the above embodiments, which are only partial embodiments. Several improvements and supplements made without departing from the spirit and scope of the present invention are deemed to be within the protection scope of the present invention.

Claims

1. A method for detecting indoor antenna signal quality, characterized in that: The following steps are involved: S1: Install the indoor antenna monitor to scan the entire frequency band; record the optimal frequency band signal Bx and the corresponding signal power; record other frequency band signals and the corresponding signal power and summarize them into a set; S2: After the first scan, set the periodic optimal signal frequency band scan, and record data and events according to different scan results; including: when the optimal frequency band detected three times in a row is not all Bx, lock the frequency and scan the frequency band Bx, and determine whether the difference between the initial value and the scan value of the non-no-load signal power of the frequency band Bx is less than a preset threshold; S3: The cloud receives the frequency band record data and events reported by the indoor antenna monitor, classifies and analyzes them according to different scanning conditions, and obtains the signal quality changes of the indoor system.

2. A method for detecting indoor antenna signal quality according to claim 1, characterized in that: The steps of step S1 include: S11: Record the optimal frequency band signal and the corresponding signal power, record the signal power scanned this time as the no-load power of the frequency band, and report the frequency band opening event to the cloud; S12: Record other frequency band signals and their corresponding signal powers, aggregate them into a set, and report them to the cloud.

3. A method for detecting indoor antenna signal quality according to claim 2, characterized in that: The classification of the scanning results in step S2 includes: The optimal frequency band detected three times in a row was Bx; The optimal signal frequency band is By for three consecutive times, and By belongs to the mid-band signal set of S12; The optimal signal frequency band is By for three consecutive times, and By does not belong to the frequency band signal set of S12; The optimal frequency bands detected three times in a row are different.

4. A method for detecting indoor antenna signal quality according to claim 3, characterized in that: When the scanning result of step S2 is that the optimal frequency band detected three times in a row is Bx, they are all recorded as the non-no-load signal power of frequency band Bx, and the average value of the three optimal signal powers of frequency band Bx is used as the non-no-load signal power reference value of frequency band Bx.

5. The indoor antenna signal quality detection method according to claim 3 is characterized in that: When the scanning result of step S2 is that the optimal signal frequency band is detected to be By for three consecutive times, and By belongs to the frequency band signal set in S12: A1: Record all results as the non-no-load signal power in frequency band By; A2: The average value of the three optimal signal powers of the frequency band By is used as the non-no-load signal power reference value of the frequency band Bx; A3: Lock the frequency and scan the frequency band Bx. If the frequency band Bx is scanned, the non-no-load signal power of the frequency band Bx is recorded. If the frequency band Bx is not scanned, the frequency band Bx closing event is reported to the cloud. A4: Calculate whether the difference between the non-idle signal power of frequency band By and the non-idle signal power of frequency band Bx is less than a preset threshold. If so, report the frequency band Bx signal quality deterioration event to the cloud.

6. A method for detecting indoor antenna signal quality according to claim 3, characterized in that: When the scanning result of step S2 is that the optimal signal frequency band is detected to be By for three consecutive times, and By does not belong to the frequency band signal set in S12: B1: Record the result as the no-load signal power in frequency band By; B2: The average value of the three optimal signal powers of frequency band By is used as the non-no-load signal power reference value of frequency band By, and the frequency band By opening event is reported; B3: Lock the frequency and scan the frequency band Bx. If the frequency band Bx is scanned, record the non-no-load signal power of the frequency band Bx. If the frequency band Bx cannot be scanned, report the frequency band Bx closing event to the cloud. B4: Calculate whether the difference between the no-load signal power of frequency band By and the non-no-load signal power of frequency band Bx is less than a preset threshold. If so, report the frequency band Bx signal quality deterioration event to the cloud.

7. A method for detecting indoor antenna signal quality according to claim 3, characterized in that: When the scanning result of step S2 is that the optimal frequency band detected for three consecutive times is different, the frequency is locked and the frequency band Bx is scanned. If the frequency band Bx is scanned, the non-no-load signal power of the frequency band Bx is recorded, and it is calculated whether the difference between the initial value of the non-no-load signal power of the frequency band Bx in S12 and the current scanning value is less than a preset threshold. If so, the frequency band Bx signal quality deterioration event is reported to the cloud; if the frequency band Bx cannot be scanned, the frequency band Bx closing event is reported to the cloud.

8. A method for detecting indoor antenna signal quality according to claim 4, 5, 6 or 7, characterized in that: The set includes a frequency band set {Bx1, Bx2, ..., Bxn} and a bandwidth set {BWx1, BWx2, ..., BWxn}. The frequency band set and the bandwidth set correspond to an idle signal power set {Rx1_idL, Rx2_idL, ..., Rxn_idL}.

9. A method for detecting indoor antenna signal quality according to claim 1, 2 or 3, characterized in that: The scanning situation includes a frequency band opening event and its timestamp, and a frequency band closing event and its timestamp.

10. A device for detecting the quality of a room-divided antenna signal, applicable to a method for detecting the quality of a room-divided antenna signal according to any one of claims 1 to 7, characterized in that: It includes a room-based antenna monitor and a frequency scanner. The frequency scanner is installed on the room-based antenna monitor. The room-based antenna monitor includes a memory and a processing unit. The room-based antenna monitor is connected to a cloud computer.

Images