Internet of Things information collection method to improve transmission reliability

Abstract

This application provides an IoT information acquisition method to improve transmission reliability. It detects the signal quality of IoT terminals, identifies IoT terminals with poor transmission quality, and achieves reliable data upload from IoT terminals with poor transmission quality through the selection of optimal relay terminals and the determination of mobile acquisition strategies. This facilitates timely reception of various IoT data by the BIM visualization platform, aiding in reliable and accurate management of infrastructure sites. Furthermore, it determines the information acquisition location points of mobile acquisition terminals using path information, obstacle distribution information, and the collinearity principle of the BIM visualization platform, and then determines the movement trajectory of each mobile acquisition terminal using the shortest path principle. This improves the signal quality of the mobile acquisition terminals as relays and the overall transmission speed.

Description

[0001] This application is a divisional application. The parent application number is 202310109453.7. The application date is February 14, 2023. The name of the invention is Internet of Things Information Collection System Based on BIM Visualization Platform. Technical Field

[0002] The present application relates to the field of infrastructure management technology, and in particular to an Internet of Things information collection method for improving transmission reliability. Background Art

[0003] The statements in this section merely provide background technical information related to the present application and do not necessarily constitute prior art.

[0004] BIM stands for Building Information Modeling. BIM is a transformation process from a two-dimensional model to a three-dimensional model. It is also a transformation process from the passive "encountering problems and solving problems" in traditional construction to the active "discovering problems and solving problems".

[0005] The BIM visualization platform is based on the on-site management platform, and comprehensively uses the Internet of Things, cloud computing, edge computing, artificial intelligence, mobile Internet, BIM, GIS and other technical means to comprehensively collect and process the data generated by factors such as personnel, equipment, safety, quality, production, and environment during the early planning, implementation, and later operation and maintenance of the project, and realize data sharing and business collaboration, and ultimately realize an intelligent process management system with comprehensive perception, ubiquitous interconnection, safe operation, intelligent production, efficient collaboration, intelligent decision-making, and scientific management. Since 2018, Linyi Company has been deeply promoting the application of BIM+ technology in the management of small-scale infrastructure of power grids. Relying on the construction of Mengyin Production Complex, Linyi Chaoyue Electric Power Engineering Service Center, and Linshu Production Complex Project, it has successfully built its own BIM visualization platform, explored an advanced management model suitable for the construction management of the construction party, promoted the intelligent and lean management of the project, and ultimately maximized the investment benefits of small-scale infrastructure projects of power grids.

[0006] BIM visualization platform has played a great role in improving infrastructure management, but it is accompanied by a large amount of IoT data upload, such as environmental monitoring data, video images from mobile cameras, IoT cards for uploading personnel locations, electricity meters, water meter billing data, etc. Due to the dense distribution of buildings, building materials, construction equipment, etc., and the installation location of IoT collection terminals inside buildings, it is easy to cause IoT data to be unable to be uploaded in a timely and accurate manner, and the reliability is poor. Therefore, proposing an information collection system that can improve the reliability of IoT data upload and further enhance the auxiliary management capabilities of BIM visualization platform is an urgent problem to be solved in the application of BIM technology in the field of infrastructure. Summary of the invention

[0007] In order to solve the above-mentioned problems, the present application proposes an IoT information collection method for improving transmission reliability. By optimizing the relay terminal and the mobile collection terminal for active collection, the IoT terminal data with poor transmission quality is relayed and uploaded, thereby improving the reliability of IoT data uploading at the infrastructure site.

[0008] This application provides an IoT information collection method for improving transmission reliability, and the specific steps are as follows:

[0009] S100: The management subsystem obtains the collection configuration information transmitted by the BIM visualization platform, and sends the configuration information to the first collection subsystem;

[0010] S200: The first acquisition subsystem performs terminal position correction and signal quality detection on the IoT terminal, and uploads the detection results to the management subsystem;

[0011] S300: The management subsystem adds the IoT terminals whose signal quality is lower than the preset value Limit1 to the set M, and the remaining IoT terminals to the set N, performs relay pairing on the IoT terminal UE_m in the set M, and sets the UE_n that satisfies (UE_n, BS_f) and is horizontally co-linear with UE_m and has the best relay link signal quality as the relay terminal of UE_m. UE_n is the IoT terminal in the set N, BS_f is the main acquisition device corresponding to UE_n, and the IoT terminal UE_m that has completed pairing is deleted from the set M;

[0012] S400: The management subsystem determines whether the set M is empty.

[0013] If yes, jump to step S600;

[0014] If not, jump to step S500;

[0015] S500: The management subsystem determines a mobile collection strategy according to the location distribution of the mobile collection terminal and the remaining IoT terminals in the set M, and sends it to each mobile collection terminal;

[0016] S600: The management subsystem dispatches the first collection subsystem to communicate directly with the IoT terminals in set N, communicate with the paired IoT terminals in set M through the relay terminal, and communicate with the unpaired IoT terminals in set M through the mobile collection subsystem.

[0017] Preferably, in step S100, the collection configuration information at least includes terminal identification information and terminal initial location distribution, and the management subsystem allocates the Internet of Things terminals to each main collection device according to the collection configuration information.

[0018] Preferably, in step S200, the specific method for the first acquisition subsystem to perform position correction and signal quality detection on the IoT terminal is:

[0019] S201: The main acquisition device measures the uplink signal of the terminal to obtain the uplink measurement value of the corresponding Internet of Things terminal, and receives the downlink measurement value obtained by measuring the downlink signal reported by the corresponding Internet of Things terminal, wherein the downlink signal includes the downlink signal of the corresponding main acquisition device and other main acquisition devices;

[0020] S202: Correct and calculate the position of the IoT terminal using the uplink measurement amount and the downlink measurement amount, and calculate the signal quality of the IoT terminal relative to each main acquisition device.

[0021] Preferably, in step S202, the positioning algorithm includes any one or a combination of fingerprint positioning method, TDOA positioning method, AOA+TA positioning method, and the signal quality judgment parameter includes at least received signal strength indication RSSI;

[0022] The measurement information of the uplink measurement amount and the downlink measurement amount in step S201 is determined according to a positioning algorithm and a signal quality judgment method.

[0023] Preferably, the specific method of step S200 further includes:

[0024] S204: After receiving the detection results uploaded by the first acquisition subsystem, the management subsystem adjusts the configuration relationship between the IoT terminal and the main acquisition device according to the signal quality, updates the location information of the IoT terminal and uploads it to the BIM visualization platform.

[0025] Preferably, in step S300, the management subsystem adds the Internet of Things terminals whose signal quality relative to all main acquisition devices is lower than a preset value Limit1 to the set M.

[0026] Preferably, in step S300, the specific method for performing relay pairing of the Internet of Things terminals UE_m in the set M is:

[0027] S301: The management subsystem selects a subset N_m from the set N that satisfies (UE_n, BS_f) and UE_m are horizontally collinear;

[0028] S302: Select any element UE_nm in the subset N_m, calculate the received signal strength RSSI_n1 from UE_nm to the corresponding main acquisition device BS_fm, calculate the received signal strength RSSI_n2 from UE_m to the main acquisition device BS_fm, and calculate the absolute value of (RSSI_n1-RSSI_n2);

[0029] S303: Traverse the subset N_m to obtain the UE_nm with the smallest absolute value of (RSSI_n1-RSSI_n2), which is the relay terminal for UE_m.

[0030] Preferably, in step S500, the specific method for the management subsystem to generate the mobile collection strategy is as follows:

[0031] S501: Acquire construction site path information and obstacle distribution information transmitted by the BIM visualization platform;

[0032] S502: Determine an information collection location point set according to the construction site path information, the main collection device, and the location distribution of the remaining IoT terminals in the set M;

[0033] S503: Connecting the location points of each mobile data collection terminal and the information collection location points in sequence according to the shortest path principle to generate a virtual connection path, and further generating a motion trajectory of each mobile data collection terminal according to the virtual connection path.

[0034] Preferably, in step S502, the specific method for the management subsystem to determine the information collection location point is as follows:

[0035] S5021: extract any remaining IoT terminal UE_m1 in the set M, connect the IoT terminal UE_m1 with the coordinate points of each main acquisition device, obtain the intersection of each connection line and the construction site path, and generate a coordinate set C1;

[0036] S5022: Optimize the coordinate set C1 according to the obstacle distribution information, delete the intersection points where there are obstacles affecting the communication efficiency on the connection path of the IoT terminal UE_m1, and generate the coordinate set C2;

[0037] S5023: Select the coordinate point with the highest signal quality in the coordinate set C2 according to the mobile acquisition signal table preset in the management subsystem, which is the information acquisition position point corresponding to UE_m1. The mobile acquisition signal table is a signal quality record table when the mobile acquisition terminal communicates with the first acquisition subsystem at each position point on the construction site path.

[0038] Preferably, in step S600, the specific method by which the management subsystem dispatches the first acquisition subsystem to communicate with the paired IoT terminals in the set M through the relay terminal is:

[0039] The management subsystem dispatches the corresponding main acquisition device to communicate directly with the IoT terminal and the relay terminal to communicate with the IoT terminal, that is, the main acquisition device and the relay terminal jointly send and receive to the IoT terminal;

[0040] The specific method for the management subsystem to dispatch the first collection subsystem to communicate with the unpaired IoT terminals in the set M through the mobile collection subsystem is:

[0041] The management subsystem dispatches the corresponding main acquisition device to communicate directly with the Internet of Things terminal and the mobile acquisition terminal to relay communication with the Internet of Things terminal, that is, the main acquisition device and the mobile acquisition terminal jointly send and receive to the Internet of Things terminal.

[0042] Compared with the prior art, the beneficial effects of this application are:

[0043] (1) This application proactively detects the signal quality of IoT terminals, identifies IoT terminals with poor transmission quality, and achieves reliable upload of data from IoT terminals with poor transmission quality through relay terminals and mobile collection terminals by optimizing relay terminals and determining mobile collection strategies, thereby facilitating the BIM visualization platform to receive various IoT data in a timely manner and assisting in reliable and accurate management of infrastructure sites.

[0044] (2) The relay terminal is selected by placing the main acquisition device, relay terminal and corresponding IoT terminal on the same line, which effectively reduces the transmission path loss. Furthermore, it is convenient to jointly send and receive the corresponding IoT terminal through the corresponding main acquisition device and relay terminal, so as to speed up the transmission speed while further reducing the path loss.

[0045] (3) This application determines the information collection location points of the mobile collection terminal through the path information, obstacle distribution information and co-linear principle of the BIM visualization platform, and then determines the movement trajectory of each mobile collection terminal through the shortest path principle, thereby improving the quality of the mobile collection terminal as a relay transmission signal and the overall transmission speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding 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 improper limitations on the present application.

[0047] Figure 1 is a schematic diagram of the system composition of an embodiment of the present application,

[0048] Figure 2 is a schematic diagram of a method flow of an embodiment of the present application,

[0049] Figure 3 is a schematic diagram of relay selection in one embodiment of the present application.

[0050] Figure 4 This is a schematic diagram of generating information collection location points according to an embodiment of the present application.

[0051] Figure 5 This is a schematic diagram of motion trajectory generation of a mobile acquisition terminal according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0053] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0054] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure and should not be understood as limitations on the present disclosure.

[0055] like Figure 1 to Figure 2 As shown, the present application provides an Internet of Things information collection system based on a BIM visualization platform, including a management subsystem, a first collection subsystem, a mobile collection subsystem, and an Internet of Things terminal subsystem. The management subsystem is connected to the BIM visualization platform, the first collection subsystem includes several main collection devices, the mobile collection subsystem includes several mobile collection terminals, and the Internet of Things terminal subsystem includes several Internet of Things terminals.

[0056] This application actively detects the signal quality of IoT terminals, identifies IoT terminals with poor transmission quality, and through optimizing relay terminals and determining mobile collection strategies, achieves reliable upload of data from IoT terminals with poor transmission quality through relay terminals and mobile collection terminals, thereby facilitating the BIM visualization platform to receive various IoT data in a timely manner and assist in reliable and accurate management of the infrastructure site.

[0057] The present application also provides an information collection method based on the above information collection subsystem, and the specific steps are as follows:

[0058] S100: The management subsystem obtains the collection configuration information transmitted by the BIM visualization platform, and sends the configuration information to the first collection subsystem;

[0059] S200: The first acquisition subsystem performs terminal position correction and signal quality detection on the IoT terminal, and uploads the detection results to the management subsystem;

[0060] S300: The management subsystem adds the IoT terminals whose signal quality is lower than the preset value Limit1 to the set M, and the remaining IoT terminals to the set N, performs relay pairing on the IoT terminal UE_m in the set M, and sets the UE_n that satisfies (UE_n, BS_f) and is horizontally co-linear with UE_m and has the best relay link signal quality as the relay terminal of UE_m. UE_n is the IoT terminal in the set N, BS_f is the main acquisition device corresponding to UE_n, and the IoT terminal UE_m that has completed pairing is deleted from the set M;

[0061] S400: The management subsystem determines whether the set M is empty.

[0062] If yes, jump to step S600;

[0063] If not, jump to step S500;

[0064] S500: The management subsystem determines a mobile collection strategy according to the location distribution of the mobile collection terminal and the remaining IoT terminals in the set M, and sends it to each mobile collection terminal;

[0065] S600: The management subsystem dispatches the first collection subsystem to communicate directly with the IoT terminals in set N, communicate with the paired IoT terminals in set M through the relay terminal, and communicate with the unpaired IoT terminals in set M through the mobile collection subsystem.

[0066] Specifically, in step S100, the collection configuration information at least includes terminal identification information and terminal initial position distribution, the terminal identification information is the identification information of the Internet of Things terminal, and the terminal initial position distribution is the position of each Internet of Things terminal. The management subsystem distributes the Internet of Things terminals to each main collection device according to the terminal initial position distribution and the position information of the main collection device according to the distance of the position. The position information of the main collection device is stored in the management subsystem or obtained from the BIM visualization platform. The BIM visualization platform includes real-life monitoring images of the infrastructure site and a three-dimensional virtual model of the infrastructure site, which can provide three-dimensional spatial position information of the infrastructure site such as actual path information of the construction site and obstacle distribution information.

[0067] like Figure 3 In the embodiment shown, BS1 to BS3 are three main data collection devices, UE1 to UE5 are five IoT terminals, and according to the location distribution, UE1 and UE2 belong to BS1 for transceiver, UE3 and UE4 belong to BS2 for transceiver, and UE5 belongs to BS3 for transceiver.

[0068] Specifically, in step S200, the specific method of the first acquisition subsystem performing position correction and signal quality detection on the IoT terminal is:

[0069] S201: The main acquisition device measures the uplink signal of the terminal to obtain the uplink measurement value of the corresponding Internet of Things terminal, and receives the downlink measurement value obtained by measuring the downlink signal reported by the corresponding Internet of Things terminal, wherein the downlink signal includes the downlink signal of the corresponding main acquisition device and other main acquisition devices;

[0070] S202: Correct and calculate the position of the IoT terminal through uplink measurement and downlink measurement, and calculate the signal quality of the IoT terminal relative to each main acquisition device.

[0071] The IoT terminals include fixed collection terminals and movable collection terminals. The location of the movable collection terminal (such as a movable surveillance camera) will change according to the construction process and progress, so it is very necessary to measure the location of the IoT terminal before collection.

[0072] Furthermore, in the step S202, the positioning algorithm includes any one or a combination of fingerprint positioning method, TDOA positioning method, AOA+TA positioning method, and the signal quality judgment parameter includes at least received signal strength indication RSSI, and the measurement information of the uplink measurement amount and the downlink measurement amount in the step S201 is determined according to the positioning algorithm and the signal quality judgment method.

[0073] The measurement quantities involved in the fingerprint positioning method are received power, TDOA (time difference of arrival), the measurement quantity involved is timing advance, and the measurement quantities involved in AOA+TA (angle of arrival + timing advance) are angle of arrival and timing advance.

[0074] The fingerprint localization algorithm is a set of algorithms proposed based on the complex indoor environment and the different signal strength information formed by signal reflection and refraction at different locations. The fingerprint algorithm can make good use of the signal information formed by reflection and refraction. The fingerprint signal strength database is first generated offline, and the position distance is calculated through a set of RSSI values ​​(Received Signal Strength Indication) actually measured in the online positioning. TDOA positioning is a method of positioning using time difference. By measuring the time when the signal arrives at the monitoring station, the distance of the signal source can be determined. The position of the signal can be determined by using the distance from the signal source to each monitoring station (with the monitoring station as the center and the distance as the radius to draw a circle). However, the absolute time is generally difficult to measure. By comparing the absolute time difference of the signal arriving at each monitoring station, a hyperbola with the monitoring station as the focus and the distance difference as the major axis can be drawn. The intersection of the hyperbola is the position of the signal. The AOA positioning method mainly measures the arrival angle between the signal mobile station and the base station. The ray formed with the base station as the starting point must pass through the mobile station. The intersection of the two rays is the position of the mobile station. This method only needs two base stations to determine the estimated position of the MS; the TA+AoA positioning method is usually only used for network-based positioning, mainly because AoA can only be measured by the base station, that is, all the measurement quantities related to this positioning method are provided by the base station. These measurement quantities can be provided by the base station to the positioning server, so the purpose of positioning can be achieved by supporting network-based positioning. Therefore, this method also brings an advantage, that is, even for terminals that do not support positioning services, they can also be positioned by this method.

[0075] The signal quality is generally judged comprehensively through multiple methods such as RSRP, SINR, RSSI, RSRQ, etc., where RSRP is the reference signal received power, SINR is the signal to interference plus noise ratio, RSRQ is the reference signal received quality, and RSSI is the received signal strength indication, which is an optional part of the wireless transmission layer and is used to determine the link quality and whether to increase the broadcast transmission strength.

[0076] The specific method of step S200 also includes:

[0077] S204: After receiving the detection results uploaded by the first acquisition subsystem, the management subsystem adjusts the configuration relationship between the IoT terminal and the main acquisition device according to the signal quality, updates the location information of the IoT terminal and uploads it to the BIM visualization platform.

[0078] The configuration relationship between the IoT terminal and the main acquisition device is adjusted according to the signal quality, that is, the signal transmission quality between the same IoT terminal and each main acquisition device is detected, and the signal is attributed to the main acquisition device with the highest signal quality for transmission and reception.

[0079] Specifically, in step S300, the management subsystem adds IoT terminals whose signal quality relative to all main acquisition devices is lower than a preset value Limit1 to set M, that is, IoT terminals whose transmission quality relative to all main acquisition devices is unreliable are added to set M.

[0080] Specifically, in step S300, the specific method for performing relay pairing of the Internet of Things terminal UE_m in the set M is:

[0081] S301: The management subsystem selects a subset N_m from the set N that satisfies (UE_n, BS_f) and UE_m are horizontally collinear;

[0082] S302: Select any element UE_nm in the subset N_m, calculate the received signal strength RSSI_n1 from UE_nm to the corresponding main acquisition device BS_fm, calculate the received signal strength RSSI_n2 from UE_m to the main acquisition device BS_fm, and calculate the absolute value of (RSSI_n1-RSSI_n2);

[0083] S303: Traverse the subset N_m to obtain the UE_nm with the smallest absolute value of (RSSI_n1-RSSI_n2), which is the relay terminal for UE_m.

[0084] (UE_n, BS_f) and UE_m are horizontally collinear, that is, in the horizontal direction, UE_n, BS_f, and UE_m are on the same straight line, n is the IoT terminal number in set N, m is the IoT terminal number in set M, and _nm is the IoT terminal number in subset N_m.

[0085] like Figure 3 As shown, the signal quality of the Internet of Things terminal UE_2 belonging to the main collection device BS_1 relative to BS_1 is lower than the preset value Limit1 due to the obstruction of the building, and the signal quality of UE_2 relative to other main collection devices is also lower than the preset value Limit1 due to the long distance or the obstruction of the building. According to step S301, a group of (UE_5, BS_3) co-linear with UE_2 is found, and there is no need to perform the relay link signal quality comparison in step S302, and UE_5 is confirmed as the relay terminal of UE_2.

[0086] Specifically, in step S500, the specific method for the management subsystem to generate the mobile collection strategy is as follows:

[0087] S501: Acquire construction site path information and obstacle distribution information transmitted by the BIM visualization platform;

[0088] S502: Determine an information collection location point set according to the construction site path information, the main collection device, and the location distribution of the remaining IoT terminals in the set M;

[0089] S503: Connecting the location points of each mobile data collection terminal and the information collection location points in sequence according to the shortest path principle to generate a virtual connection path, and further generating a motion trajectory of each mobile data collection terminal according to the virtual connection path.

[0090] Specifically, in step S502, the management subsystem determines the information collection location point in the following manner:

[0091] S5021: extract any remaining IoT terminal UE_m1 in the set M, connect the IoT terminal UE_m1 with the coordinate points of each main acquisition device, obtain the intersection of each connection line and the construction site path, and generate a coordinate set C1;

[0092] S5022: Optimize the coordinate set C1 according to the obstacle distribution information, delete the intersection points where there are obstacles affecting the communication efficiency on the connection path of the IoT terminal UE_m1, and generate the coordinate set C2;

[0093] S5023: Select the coordinate point with the highest signal quality in the coordinate set C2 according to the mobile acquisition signal table preset in the management subsystem, which is the information acquisition position point corresponding to UE_m1. The mobile acquisition signal table is a signal quality record table when the mobile acquisition terminal communicates with the first acquisition subsystem at each position point on the construction site path.

[0094] The mobile acquisition signal table is a record table of the pre-measured communication signal qualities between the mobile acquisition terminal and each main acquisition device of the first acquisition subsystem at each position along the construction site path.

[0095] like Figure 4 As shown in the figure, BS is each main collection device, UE is the Internet of Things terminal that needs mobile collection, the white frame part containing the dotted frame in the figure is the building, and the shaded part between the buildings is the construction site path. By connecting the UE with each BS, the intersection points of the connection line and each branch of the path (collection points to be selected) can be obtained, that is, the dots in the figure. The coordinate set C1 is generated according to the position information of the dots. As shown in the figure, there are obstacle buildings in the buildings. According to the distribution area of ​​the obstacle buildings, the intersection points with the obstacles that affect the communication efficiency on the connection path of the Internet of Things terminal UE_m1 are deleted to generate the coordinate set C2, check the mobile collection signal table, and select the coordinate point with the highest signal quality in the coordinate set C2, which is the information collection location point corresponding to the UE.

[0096] like Figure 5 As shown in the figure, MBS_1 and MBS_2 are mobile acquisition terminals. According to step S503, the location points of each mobile acquisition terminal and the information acquisition location point are connected in sequence. The shortest path is selected from various connection schemes as a virtual connection path. The virtual connection path is truncated according to the location points of the mobile acquisition terminal to generate line segments each containing only one mobile acquisition terminal, such as Figure 5 The virtual connection path is divided into two segments by the dotted line, and the two line segments are the movement trajectories of the mobile acquisition terminals MBS_1 and MBS_2.

[0097] Specifically, in step S600, the specific method in which the management subsystem schedules the first acquisition subsystem to communicate with the paired IoT terminals in the set M through the relay terminal is:

[0098] The management subsystem dispatches the corresponding main acquisition device to communicate directly with the IoT terminal and the relay terminal to communicate with the IoT terminal, that is, the main acquisition device and the relay terminal jointly send and receive to the IoT terminal;

[0099] The specific method for the management subsystem to dispatch the first collection subsystem to communicate with the unpaired IoT terminals in the set M through the mobile collection subsystem is:

[0100] The management subsystem dispatches the corresponding main acquisition device to communicate directly with the Internet of Things terminal and the mobile acquisition terminal to relay communication with the Internet of Things terminal, that is, the main acquisition device and the mobile acquisition terminal jointly send and receive to the Internet of Things terminal.

[0101] The management subsystem dispatches the corresponding main collection devices, relay terminals, and main collection devices and mobile collection terminals to jointly transmit and receive to the corresponding IoT terminals, so as to speed up the transmission speed on the basis of reducing path loss, and further improve the speed and quality of IoT communication.

[0102] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0103] Although the above describes the specific implementation methods of the present application in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present application. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present application, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the present application.

Claims

1. An Internet of Things information collection method for improving transmission reliability, characterized in that: The specific steps include: S100: The management subsystem obtains the collection configuration information transmitted by the BIM visualization platform, and sends the collection configuration information to the first collection subsystem; S200: The first acquisition subsystem performs terminal position correction and signal quality detection on the IoT terminal, and uploads the detection results to the management subsystem; S300: The management subsystem adds the IoT terminals whose signal quality is lower than the preset value Limit1 to the set M, and the remaining IoT terminals to the set N, performs relay pairing on the IoT terminal UE_m in the set M, and sets the UE_n that satisfies the horizontal co-linearity of UE_n, BS_f and UE_m and has the best relay link signal quality as the relay terminal of UE_m, UE_n is the IoT terminal in the set N, BS_f is the main acquisition device corresponding to UE_n, and the IoT terminal UE_m that has completed pairing is deleted from the set M; S400: The management subsystem determines whether the set M is empty. If yes, jump to step S600; If not, jump to step S500; S500: The management subsystem determines a mobile collection strategy according to the location distribution of the mobile collection terminal and the remaining IoT terminals in the set M, and sends it to each mobile collection terminal; S600: The management subsystem dispatches the first collection subsystem to communicate directly with the IoT terminals in the set N, communicate with the paired IoT terminals in the set M through the relay terminal, and communicate with the unpaired IoT terminals in the set M through the mobile collection subsystem; The Internet of Things terminals include fixed collection terminals and movable collection terminals. The position of the movable collection terminal will change. In the step S100, the collection configuration information at least includes terminal identification information and terminal initial position distribution. The position information of the main collection device is stored in the management subsystem or obtained from the BIM visualization platform. The management subsystem allocates the Internet of Things terminals to each main collection device according to the initial position distribution of the terminal and the position information of the main collection device according to the distance of the location.

2. The method for collecting information of the Internet of Things with improved transmission reliability according to claim 1, characterized in that: In step S200, the specific method of the first acquisition subsystem performing position correction and signal quality detection on the IoT terminal is: S201: The main acquisition device measures the uplink signal of the terminal to obtain the uplink measurement value of the corresponding Internet of Things terminal, and receives the downlink measurement value obtained by measuring the downlink signal reported by the corresponding Internet of Things terminal, wherein the downlink signal includes the downlink signal of the corresponding main acquisition device and other main acquisition devices; S202: Correct and calculate the position of the IoT terminal through uplink measurement and downlink measurement, and calculate the signal quality of the IoT terminal relative to each main acquisition device.

3. The method for collecting information of the Internet of Things for improving transmission reliability according to claim 2 is characterized in that: In the step S202, the positioning algorithm includes any one or a combination of fingerprint positioning method, TDOA positioning method, AOA+TA positioning method, and the signal quality judgment parameter includes at least a received signal strength indication RSSI; The measurement information of the uplink measurement amount and the downlink measurement amount in step S201 is determined according to a positioning algorithm and a signal quality judgment method.

4. The method for collecting information on the Internet of Things with improved transmission reliability according to claim 2 is characterized in that: The specific method of step S200 also includes: S204: After receiving the detection results uploaded by the first acquisition subsystem, the management subsystem adjusts the configuration relationship between the IoT terminal and the main acquisition device according to the signal quality, updates the location information of the IoT terminal and uploads it to the BIM visualization platform.

5. The method for collecting information of the Internet of Things for improving transmission reliability according to claim 4 is characterized in that: In step S300, the management subsystem adds the IoT terminals whose signal quality relative to all main acquisition devices is lower than a preset value Limit1 to the set M.

6. The method for collecting information of the Internet of Things for improving transmission reliability according to claim 5 is characterized in that: In step S300, the specific method for performing relay pairing of the Internet of Things terminal UE_m in the set M is: S301: The management subsystem selects a subset N_m from the set N that satisfies the horizontal collinearity of UE_n, BS_f and UE_m; S302: Select any element UE_nm in the subset N_m, calculate the received signal strength RSSI_n1 from UE_nm to the corresponding main acquisition device BS_fm, calculate the received signal strength RSSI_n2 from UE_m to the main acquisition device BS_fm corresponding to UE_nm, and calculate the absolute value of (RSSI_n1-RSSI_n2); S303: Traverse the subset N_m to obtain the UE_nm with the smallest absolute value of (RSSI_n1-RSSI_n2), and set the UE_nm with the smallest absolute value as the relay terminal of UE_m.

7. The method for collecting information on the Internet of Things for improving transmission reliability according to any one of claim 2 or claim 6, characterized in that: In step S500, the specific method for the management subsystem to generate a mobile collection strategy is as follows: S501: Acquire construction site path information and obstacle distribution information transmitted by the BIM visualization platform; S502: Determine an information collection location point set according to the construction site path information, the main collection device, and the location distribution of the remaining IoT terminals in the set M; S503: Connecting the location points of each mobile data collection terminal and the information collection location points in sequence according to the shortest path principle to generate a virtual connection path, and further generating a motion trajectory of each mobile data collection terminal according to the virtual connection path.

8. The method for collecting information of the Internet of Things for improving transmission reliability according to claim 7 is characterized in that: In step S502, the specific method for the management subsystem to determine the information collection location point is as follows: S5021: extract any remaining IoT terminal UE_m1 in the set M, connect the IoT terminal UE_m1 with the coordinate points of each main acquisition device, obtain the intersection of each connection line and the construction site path, and generate a coordinate set C1; S5022: Optimize the coordinate set C1 according to the obstacle distribution information, delete the intersection points where there are obstacles affecting the communication efficiency on the connection path of the IoT terminal UE_m1, and generate the coordinate set C2; S5023: Select the coordinate point with the highest signal quality in the coordinate set C2 according to the mobile acquisition signal table preset in the management subsystem. The coordinate point with the highest signal quality is the information acquisition position point corresponding to UE_m1. The mobile acquisition signal table is a signal quality record table when the mobile acquisition terminal communicates with the first acquisition subsystem at each position point on the construction site path.

9. The method for collecting information of the Internet of Things for improving transmission reliability according to claim 8, characterized in that: In step S600, the specific method of the management subsystem scheduling the first acquisition subsystem to communicate with the paired IoT terminals in the set M through the relay terminal is: The management subsystem dispatches the corresponding main acquisition device to communicate directly with the IoT terminal and the relay terminal to communicate with the IoT terminal via relay; The specific method for the management subsystem to dispatch the first collection subsystem to communicate with the unpaired IoT terminals in the set M through the mobile collection subsystem is: The management subsystem dispatches the corresponding main acquisition device to communicate directly with the Internet of Things terminal and the mobile acquisition terminal to relay communication with the Internet of Things terminal.

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