Intelligent access broadcasting method and system based on wireless communication

Abstract

The application discloses a kind of intelligent access broadcast method and system based on wireless communication, the method includes: mobile terminal gathers positioning information and the wireless cell information of surrounding base station;According to the information and pre-set database are matched, through weighted decision algorithm judges the target line and target position point where user is currently located;Automatic access target line corresponding special-purpose wireless communication network, automatically access the broadcast system of target position point;In the scene of multiple signal overlaps, self-determination signal priority or positioning priority, or receive user manual instruction to complete access.The system includes mobile terminal, wireless access network, broadcast system equipment, core network and database server.The application realizes that terminal accesses network and broadcast automatically, accurately and reliably in subway environment etc., improves communication efficiency and user experience, and is suitable for a variety of wireless communication systems such as 4G, 5G.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of wireless communication and intelligent traffic information technology, and particularly relates to an intelligent access broadcast method and system based on wireless communication. BACKGROUND

[0002] In the environment of subway, tunnel, etc., stable and reliable private wireless communication is crucial for ensuring operation safety and improving efficiency. Private communication network based on 4G LTE, 5G NR, etc. has become the industry mainstream.

[0003] Currently, in the above environment, there are problems in the access of mobile terminals (such as private handheld terminals, vehicle-mounted terminals) to the network and broadcast system, including:

[0004] (1) Manual operation is tedious and prone to error: At transfer stations and multi-line intersection, the terminal receives multiple network signals at the same time, and the user needs to manually select the correct network and broadcast, which is inconvenient to operate and prone to error in emergency situations.

[0005] (2) Weak position sensing capability: Traditional terminals only select service cells according to signal strength, and cannot intelligently identify the specific line and location point (such as station name) they are in. In signal overlapping areas, it is easy to cause frequent switching or access to incorrect networks.

[0006] (3) Broadcast access is not intelligent: Broadcast systems usually need to be pre-configured or manually searched, and cannot achieve automatic and seamless access based on physical location, resulting in low information acquisition efficiency.

[0007] (4) Poor scene adaptability: Single-line tunnel sections and multi-line transfer areas have completely different needs for signal strength priority or positioning priority. Existing algorithms use a single decision criterion and cannot dynamically adjust between the two scenarios, resulting in repeated switching in signal overlapping areas or stubbornly sticking to weak signal cells in long tunnel sections, reducing link stability. SUMMARY

[0008] The present application aims to overcome the shortcomings of the prior art and provide an intelligent access broadcast method based on wireless communication, which enables mobile terminals to comprehensively utilize positioning information and wireless communication cell information, automatically determine the target line and location point where the user is located, and automatically access the corresponding private network and broadcast system. It also supports manual access and is suitable for various wireless communication technologies (such as 4G LTE or 5G NR).

[0009] Corresponding to the above-mentioned intelligent access broadcast method based on wireless communication, the present application also provides an intelligent access broadcast method and system based on wireless communication.

[0010] Technical solution: The application provides a wireless communication-based intelligent access broadcast method, which comprises the following steps:

[0011] Collecting positioning information and wireless cell information of surrounding base stations;

[0012] Matching the positioning information with a preset geographic information database to obtain a preliminary position area, and matching the wireless cell information with a preset cell information-geographic position mapping database to obtain a candidate set of lines and position points corresponding to each candidate cell, wherein the candidate set comprises candidate lines and candidate position points;

[0013] Fusing and judging the line and position point information mapped by the preliminary position area and each candidate cell by using a weighted decision algorithm to calculate a target line and a target position point where the terminal is most likely to be currently located;

[0014] If the fusion and judgment is successful, a network registration request is automatically initiated, a dedicated wireless communication network corresponding to the target line is accessed first, and then a broadcast system of the target position point is automatically accessed; if the fusion and judgment is not successful, a special scene processing strategy is executed;

[0015] The special scene processing strategy comprises the following steps:

[0016] If the terminal is located in a single candidate line signal overlapping area, the positioning information weight is increased, and the network and the broadcast system corresponding to the candidate cell with the optimal positioning are selected for access;

[0017] If the terminal is located in a multiple candidate line signal overlapping area, the cell information weight is increased, and the network and the broadcast system corresponding to the candidate cell with the optimal signal strength quality are selected for access.

[0018] Further, the positioning information is obtained by GPS or BDS; the wireless cell information comprises cell identification ECGI / PCI, absolute frequency point number EARFCN, reference signal receiving power RSRP / SS-RSRP and reference signal receiving quality RSRQ.

[0019] Further, the fusion and judgment of the line and position point information mapped by the preliminary position area and each candidate cell by using the weighted decision algorithm comprises the following steps:

[0020] For the candidate line and the candidate position point of each candidate in the candidate set, the position matching degree of the candidate position point of the candidate and the preliminary position area is calculated; the straight line distance between the candidate position point and the preset reference point in the preliminary position area is calculated, and the straight line distance is used to calculate the position matching degree according to a preset linear attenuation function;

[0021] Obtain the signal strength quality value of the wireless cell corresponding to the candidate; the signal strength quality value is calculated by weighted fusion of the reference signal received power and the reference signal received quality of the corresponding wireless cell;

[0022] The location matching degree is weighted using a preset location weighting factor, and the signal strength quality value is weighted using a preset cell weighting factor; the weighted results are summed to obtain the comprehensive score of the candidate. The comprehensive score calculation formula is as follows:

[0023] Overall score = Location matching degree × Positioning weight + Signal strength quality value × Cell weight;

[0024] The candidate with the highest overall score is selected as the fusion judgment result; if the highest score exceeds the preset threshold, the fusion judgment is judged to be successful; otherwise, the fusion judgment is judged to be unsuccessful.

[0025] Furthermore, the location matching degree is calculated in the following way:

[0026] Determine a reference point P within the initial location area. ref The reference point is any one of the following: the center point of the region, the centroid point, or the nearest point on the directional center line of the region.

[0027] Calculate candidate location point P candidate To reference point P ref The straight-line distance D; the smaller the straight-line distance, the higher the position matching degree;

[0028] Calculating the matching score using a linear decay function: Substituting the distance D into the linear decay function yields the matching score S. position The formula is S position =max(0,1−D / D max );

[0029] Among them, D max It is the preset maximum effective distance; when D=0, S position The score is 1; when D≥D max At that time, S position The score is 0;

[0030] The signal strength quality value is calculated in the following way:

[0031] Calculate the normalized value N of the reference signal received power (RSRP) and the reference signal received quality (RSRQ) of the corresponding wireless cell. rsrp and N rsrq The formula is:

[0032] N rsrp= (RSRP-RSRP min ) / (RSRP max -RSRP min ) ;

[0033] N rsrq = (RSRQ-RSRQ min ) / (RSRQ max -RSRQ min ) ;

[0034] Wherein, RSRP max and RSRP min are preset RSRP best and worst threshold; RSRQ max and RSRQ min are preset RSRQ best and worst threshold;

[0035] Weighted fusion calculation signal strength quality value, the formula is: signal strength quality value = α × N rsrp + β × N rsrq ;

[0036] Wherein, α and β are the weight coefficient of N rsrp and N rsrq , and α + β = 1.

[0037] Further, the access target line corresponding to the dedicated wireless communication network, comprising:

[0038] The target line and the preset line-wireless network access parameter mapping database matching, access the target line wireless network access parameter;

[0039] Mobile terminal according to the wireless network access parameter automatically access the dedicated wireless communication network.

[0040] Further, the automatic access target location point broadcast system, comprising:

[0041] The target location point and the preset location point-broadcast system access parameter mapping database matching, access the target location point broadcast system access parameter;

[0042] Mobile terminal in the dedicated wireless communication network according to the broadcast system access parameter to the target location point corresponding broadcast system initiates access request;

[0043] Broadcast system receives request and authorizes mobile terminal access; mobile terminal initiates voice broadcast, real-time transmission of voice data stream through IP multicast or unicast mode to the target location point broadcast system host; broadcast system receives voice data and decoding into audio signal, the audio signal is transmitted to the broadcast area, complete broadcast voice broadcast.

[0044] Further, in any overlapping scenario, the mobile terminal receives a user manual line selection instruction through a human-computer interaction interface, and when the instruction is received, the terminal accesses the corresponding network and broadcast system according to the user specified line in priority.

[0045] The application further provides a wireless communication based intelligent access broadcast system, comprising:

[0046] The acquisition module is configured to acquire positioning information and wireless cell information of surrounding base stations.

[0047] The matching module is configured to match the positioning information with a preset geographic information database to obtain a preliminary location area, and match the wireless cell information with a preset cell information-geographic position mapping database to obtain a candidate set of lines and position points corresponding to each candidate cell, wherein the candidate set comprises candidate lines and candidate position points.

[0048] The fusion judgment module is configured to use a weighted decision algorithm to perform fusion judgment on the line and position point information mapped by the preliminary location area and each candidate cell, and calculate a target line and a target position point where the terminal is most likely to be currently located.

[0049] The broadcast access module is configured to automatically initiate a network registration request if the fusion judgment is successful, access a dedicated wireless communication network corresponding to the target line first, and then automatically access a broadcast system of the target position point.

[0050] The special processing module is configured to perform a special scenario processing strategy if the fusion judgment is not successful.

[0051] The special scenario processing strategy comprises:

[0052] If the terminal is located in a single candidate line signal overlapping area, the positioning information weight is increased, and the network and broadcast system corresponding to the candidate cell with the optimal positioning are selected for access.

[0053] If the terminal is located in a multiple candidate line signal overlapping area, the cell information weight is increased, and the network and broadcast system corresponding to the candidate cell with the optimal signal strength quality are selected for access.

[0054] The application further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0055] The application further provides a computer readable storage medium, which stores a computer program, wherein the computer program is executable on a processor to implement the steps of the above method.

[0056] Advantages: Compared with the prior art, the application has the following advantages:

[0057] Strong technology universality: through high-level design, the core method is applicable to 4G LTE, 5G NR and future cellular communication technologies, with a long life cycle.

[0058] High intelligence and automation: full-process automation from position identification to network and broadcast access is realized, greatly improving user experience and operation efficiency, and reducing human errors.

[0059] Accurate and reliable judgment: through the fusion of positioning (macro) and wireless cell information (micro) and combined with decision rules, the accuracy of position identification in complex environments is significantly improved.

[0060] High robustness: overlapping area processing logic and user manual coverage mechanism ensure system reliability and user controllability in various edge scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0061] Figure 1 The system architecture diagram of the intelligent access broadcast of the application.

[0062] Figure 2 The host schematic diagram of the mobile terminal access broadcast system of the application.

[0063] Figure 3 The mobile terminal intelligent judgment and control flowchart of the application.

[0064] Figure 4 The mobile terminal access broadcast flowchart of the application. DETAILED DESCRIPTION

[0065] The application will be further illustrated below in conjunction with the drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the application and not to limit the scope of the application. After reading the application, those skilled in the art can modify various equivalent forms of the application, which fall within the scope defined by the appended claims.

[0066] Embodiment one

[0067] As shown in Figure 1 and Figure 3 The application provides an intelligent access broadcast method based on wireless communication, comprising:

[0068] S1, collecting positioning information and wireless cell information of at least one base station in the surrounding; the positioning information is obtained by GPS or BDS;

[0069] S2, call the local or network side database, match the positioning information with the preset geographic information database, obtain the preliminary location area, and match the wireless cell information with the preset cell information-geographic position mapping database, obtain the candidate set of lines and position points corresponding to each candidate cell, and the candidate set contains candidate lines and candidate position points;

[0070] S3, a weighted decision algorithm is used to fuse and judge the line and position point information mapped by the preliminary location area and each candidate cell, and the target line and target position point where the terminal is most likely to be currently located are calculated;

[0071] S4, if the fusion judgment is successful, a network registration request is automatically initiated, the special wireless communication network corresponding to the target line is accessed first, and then the broadcast system of the target position point is automatically accessed; if the fusion judgment is unsuccessful, a special scene processing strategy is executed;

[0072] S5, refresh the man-machine interaction interface, and display the current access network and broadcast state in real time.

[0073] In this embodiment,

[0074] S1 obtains the positioning information of the wireless device and the wireless cell information of the base station through the GPS or BDS of the wireless device, the positioning information includes the longitude and latitude coordinates, the altitude, the positioning timestamp, etc. of the wireless device, and the wireless cell information includes the cell identifier (such as PCI in 4G LTE, PCI in 5G NR), the absolute frequency point number (such as EARFCN in 4G LTE, NR-ARFCN in 5G NR), the reference signal received power (such as RSRP in 4G LTE, SS-RSRP in 5G NR), and the reference signal received quality RSRQ;

[0075] S2 matches the positioning information obtained by S1 with the local or network side geographic information database, obtains the preliminary location area of the wireless device, and matches the wireless cell information with the local or network side cell information-geographic position mapping database, obtains the candidate set of lines and position points corresponding to each candidate cell, and the candidate set contains candidate lines and candidate position points; the cell information-geographic position mapping database defines the subway line, position point name and coverage area corresponding to each cell identifier;

[0076] S3, a weighted decision algorithm is used to fuse and judge the line and position point information mapped by the preliminary location area and each candidate cell, and the target line and target position point where the terminal is most likely to be currently located are calculated;

[0077] S3-1. For each candidate route and candidate location point in the candidate set, calculate the position matching degree between the candidate location point and the preliminary location region; the position matching degree is a quantified value determined based on the spatial relationship between the candidate location point and the preliminary location region, used to characterize the probability that the candidate location point is located within the preliminary location region. The calculation steps include:

[0078] Within the initial location area, a reference point P is adaptively determined based on the real-time scene. ref If a directional route (such as a tunnel, highway, or subway corridor) appears in the initial location area, the point on the center line of that route that has the closest Euclidean distance to the latitude and longitude coordinates of the wireless device is taken as the reference point. Calculate the length and width of the minimum bounding rectangle of the initial location area. If the length-to-width ratio is less than 2, the centroid of the initial location area is taken as the reference point; otherwise, the center point of the initial location area is taken as the reference point.

[0079] Calculate candidate location point P candidate To reference point P ref The straight-line distance D; the smaller the straight-line distance, the higher the position matching degree;

[0080] Calculating the location matching score using a linear decay function: Substituting the distance D into the linear decay function yields the matching score S. position The formula is S position =max(0,1−D / D max );

[0081] Where D max It is the preset maximum effective distance. When D=0, S position The score is 1; when D≥D max At that time, S position The score is 0.

[0082] S3-2. Obtain the signal strength quality value of the wireless cell corresponding to the candidate; the signal strength quality value is obtained by weighted fusion calculation of the reference received power (RSRP) and the reference received quality (RSRQ) of the corresponding wireless cell, and the calculation steps include:

[0083] Calculate the standardized values ​​of RSRP and RSRQ, respectively, N. rsrp and N rsrq :

[0084] N rsrp =(RSRP-RSRP min ) / (RSRP max -RSRP min );

[0085] Nrsrq = (RSRP - RSRQ min ) / (RSRP max - RSRQ min );

[0086] wherein, RSRP max and RSRP min are the RSRP best threshold (such as -80 dB) and worst threshold (such as -110 dB) corresponding to the wireless cell respectively; RSRQ max and RSRQ min are the RSRQ best threshold (such as -3 dB) and worst threshold (such as -20 dB) corresponding to the wireless cell respectively;

[0087] N rsrp and N rsrq are weighted and fused to calculate the final signal strength quality value, and the formula is: signal strength quality value = α × N rsrp + β × N rsrq ; wherein, α and β are the weight coefficients of N rsrp and N rsrq respectively, and α + β = 1, and the weight coefficients α and β are adjusted according to network strategy; for example, when the connectivity is prioritized at the coverage edge, α > β (such as α = 0.7, β = 0.3) is set; when the quality is prioritized in the serious interference area, α < β (such as α = 0.4, β = 0.6) is set; this method can effectively avoid making wrong decisions in the strong interference scene (high RSRP but extremely low RSRQ), and improve the stability and quality of accessing the network;

[0088] S3-3, the position matching degree and the signal strength quality value are weighted and summed to obtain the comprehensive score of the candidate, and the comprehensive score calculation formula is as follows:

[0089] comprehensive score = position matching degree × positioning weight + signal strength quality value × cell weight;

[0090] wherein, the positioning weight and the cell weight can be dynamically adjusted, and the sum of the positioning weight and the cell weight is usually 1; for example, in an open area, the GPS signal is good, the positioning weight is preset to 0.7, and the cell weight is 0.3; in an underground tunnel, the GPS is invalid, the positioning weight is preset to 0.1, and the cell weight is 0.9;

[0091] S3-4, the comprehensive scores of all candidate items are calculated, and the candidate item with the highest comprehensive score is selected as the fusion judgment result; if the highest score exceeds a preset threshold, it is determined that the fusion judgment is successful; otherwise, it is determined that the fusion judgment fails.

[0092] If the fusion judgment is successful, the target line and the position point are output; if the fusion judgment is not successful, a special scene processing strategy is executed; if the terminal is in a single candidate line signal overlapping area, the positioning information weight is increased or the user input is waited for; if the terminal is in a plurality of candidate line signal overlapping areas, the cell information weight is increased or the user input is waited for;

[0093] In S4, after the fusion judgment is successful, a network registration request is automatically initiated, the special wireless communication network corresponding to the target line is accessed, and then the broadcast system of the target position point is automatically accessed, as shown in Figure 4 and Figure 2 .

[0094] Different lines have special wireless communication network environments for wireless access of the mobile terminal, and the mobile terminal is pre-registered in the network environment of each line.

[0095] The special wireless communication network corresponding to the target line comprises:

[0096] The target line is matched with a preset line-wireless network access parameter mapping database to obtain the wireless network access parameter of the target line;

[0097] The mobile terminal automatically accesses the special wireless communication network according to the wireless network access parameter.

[0098] The broadcast system of the target position point comprises:

[0099] The target position point is matched with a preset position point-broadcast system access parameter mapping database to obtain the broadcast system access parameter of the target position point;

[0100] The mobile terminal initiates an access request to the broadcast system corresponding to the target position point according to the broadcast system access parameter in the special wireless communication network;

[0101] The broadcast system receives the request and authorizes the mobile terminal to access; the mobile terminal initiates voice broadcast, and real-time sends a voice data stream to the broadcast system host of the target position point through IP multicast or unicast; the broadcast system receives the voice data and decodes it into an audio signal, and transmits the audio signal to a broadcast area to complete the broadcast voice broadcast.

[0102] In S4, when the fusion judgment fails, a special scene processing strategy is adopted, comprising:

[0103] If the terminal is in a single candidate line signal overlapping area, the positioning information weight is increased, and the network and the broadcast system corresponding to the candidate cell with the optimal positioning are accessed;

[0104] If the terminal is in the area where multiple candidate line signals overlap, the weight of the cell information is increased, and the network and broadcast system corresponding to the candidate cell with the optimal signal strength quality are selected for access.

[0105] In any overlapping scenario, the mobile terminal can receive a user manual line selection instruction through a human-computer interaction interface, and when the instruction is received, the terminal accesses the corresponding network and broadcast system according to the user-specified line to meet the user's demand.

[0106] The human-computer interaction interface is refreshed to display the current access network and broadcast state in real time.

[0107] Embodiment Two

[0108] As Figure 1 With Figure 3 Based on Embodiment One, the present application provides an intelligent access broadcast system based on wireless communication, comprising: a collection module, a matching module, a fusion judgment module, a broadcast access module, a special processing module, a refreshing module, a mobile terminal, a wireless access network, a core network server, a broadcast system device, a database, a network-side database server;

[0109] The collection module collects positioning information and wireless cell information of at least one surrounding base station; the positioning information is obtained through GPS or BDS;

[0110] The matching module is used to call a local or network-side database, match the positioning information with a preset geographic information database to obtain a preliminary position area, and match the wireless cell information with a preset cell information-geographic position mapping database to obtain a candidate set of lines and position points corresponding to each candidate cell, the candidate set including candidate lines and candidate position points;

[0111] The fusion judgment module is used to adopt a weighted decision algorithm to perform fusion judgment on the line and position point information of the preliminary position area and each candidate cell, and calculate the target line and target position point where the terminal is most likely currently located;

[0112] The broadcast access module automatically initiates a network registration request if the fusion judgment is successful, first accesses the dedicated wireless communication network corresponding to the target line, and then automatically accesses the broadcast system of the target position point; the special processing module is used to execute a special scenario processing strategy if the fusion judgment is not successful;

[0113] The refreshing module is used to refresh the human-computer interaction interface to display the current access network and broadcast state in real time.

[0114] In this embodiment,

[0115] The mobile terminal is built-in positioning module and wireless communication module, support 4G LTE, 5G NR wireless communication technology;The wireless access network is composed of multiple base stations;The database can be selected local database or network side database;The mobile terminal and base station through wireless signal to establish communication connection, realize voice, data and control signaling transmission;The mobile terminal can be connected with network side database to obtain or update data;The base station and core network server through wired or wireless way connection, transmission voice data and control signaling;The network side database server is deployed in network environment, for application program provides centralized data storage and query service of special computer.

[0116] The acquisition module obtains the positioning information of the wireless device and the wireless cell information of the base station through the GPS or BDS of the wireless device, the positioning information includes the longitude and latitude coordinates, altitude, positioning timestamp, etc. of the wireless device, and the wireless cell information includes the cell identifier (such as PCI in 4G LTE, PCI in 5G NR), absolute frequency number (such as EARFCN in 4G LTE, NR-ARFCN in 5G NR), reference signal received power (such as RSRP in 4G LTE, SS-RSRP in 5G NR), reference signal received quality RSRQ;

[0117] The matching module matches the positioning information obtained by the acquisition module with the local or network side geographic information database to obtain the preliminary position area of the wireless device, and matches the wireless cell information with the local or network side cell information-geographic position mapping database to obtain the candidate set of lines and position points corresponding to each candidate cell. The candidate set includes candidate lines and candidate position points. The cell information-geographic position mapping database defines the subway line, position point name and coverage area corresponding to each cell identifier;

[0118] The fusion judgment module uses a weighted decision algorithm to fuse and judge the line and position point information mapped by the preliminary position area and each candidate cell, including:

[0119] The position matching degree calculation module is used to calculate the position matching degree of the candidate position point of each candidate item in the candidate set and the preliminary position area. The position matching degree is a quantitative value determined based on the spatial relationship between the candidate position point and the preliminary position area, which is used to represent the possibility of the candidate position point being located in the preliminary position area. The calculation steps include:

[0120] A reference point P is determined in the preliminary position area according to the real-time scene refIf a directional route (such as a tunnel, highway, or subway corridor) appears in the initial location area, the point on the center line of that route that has the closest Euclidean distance to the latitude and longitude coordinates of the wireless device is taken as the reference point. Calculate the length and width of the minimum bounding rectangle of the initial location area. If the length-to-width ratio is less than 2, the centroid of the initial location area is taken as the reference point; otherwise, the center point of the initial location area is taken as the reference point.

[0121] Calculate candidate location point P candidate To reference point P ref The straight-line distance D; the smaller the straight-line distance, the higher the position matching degree;

[0122] Calculating the location matching score using a linear decay function: Substituting the distance D into the linear decay function yields the matching score S. position The formula is S position =max(0,1−D / D max );

[0123] Where D max It is the preset maximum effective distance. When D=0, S position The score is 1; when D≥D max At that time, S position The score is 0.

[0124] The signal strength quality calculation module is used to obtain the signal strength quality value of the corresponding radio cell for the candidate. The signal strength quality value is obtained by weighted fusion calculation of the reference received power (RSRP) and the reference received quality (RSRQ) of the corresponding radio cell. The calculation steps include:

[0125] Calculate the standardized values ​​of RSRP and RSRQ, respectively, N. rsrp and N rsrq :

[0126] N rsrp =(RSRP-RSRP min ) / (RSRP max -RSRP min );

[0127] N rsrq =(RSRQ-RSRQ min ) / (RSRQ max -RSRQ min );

[0128] Among them, RSRP max and RSRP min These are the optimal (e.g., -80dB) and worst (e.g., -110dB) RSRP thresholds for the corresponding wireless cell; RSRQmax and RSRQ min are the RSRQ best threshold (e.g. -3 dB) and the worst threshold (e.g. -20 dB) corresponding to the wireless cell respectively;

[0129] N rsrp and N rsrq are weighted and fused to calculate the final signal strength quality value, with the formula: signal strength quality value = a x N rsrp + b x N rsrq ; wherein a and b are the weight coefficients of N rsrp and N rsrq respectively, and a + b = 1, the weight coefficients a and b are adjusted according to network strategy; for example, when the coverage edge is prioritized to ensure connectivity, a > b (e.g. a = 0.7, b = 0.3) is set; when the interference is serious area is prioritized to ensure quality, a < b (e.g. a = 0.4, b = 0.6) is set; this method can effectively avoid making wrong decisions in strong interference scenarios (high RSRP but extremely low RSRQ), and improve the stability and quality of network access;

[0130] The comprehensive calculation module is configured to weight and sum the position matching degree and the signal strength quality value to obtain a comprehensive score of the candidate, and the comprehensive score calculation formula is specifically as follows:

[0131] Comprehensive score = position matching degree x positioning weight + signal strength quality value x cell weight.

[0132] Wherein, the positioning weight and the cell weight can be dynamically adjusted, and the sum of the positioning weight and the cell weight is usually 1; for example, in open areas, the GPS signal is good, the preset positioning weight is 0.7, and the cell weight is 0.3; in underground tunnels, the GPS is invalid, the preset positioning weight is 0.1, and the cell weight is 0.9.

[0133] The comprehensive calculation and fusion judgment module is configured to calculate the comprehensive scores of all candidate items, and select the candidate item with the highest comprehensive score as the fusion judgment result; if the highest score exceeds a preset threshold, it is determined that the fusion judgment is successful; otherwise, it is determined that the fusion judgment fails.

[0134] If the fusion judgment is successful, the target line and the position point are output; if the fusion judgment is not successful, a special scene processing strategy is executed; if the terminal is in a single candidate line signal overlapping area, the positioning information weight is increased or the user is waited for input; if the terminal is in a plurality of candidate line signal overlapping areas, the cell information weight is increased or the user is waited for input.

[0135] The broadcast access module automatically initiates a network registration request after the fusion judgment is successful, first accesses the dedicated wireless communication network corresponding to the target line, and then automatically accesses the broadcast system of the target position point, such as Figure 4 andFigure 2 The mobile terminal is shown in the figure.

[0136] Different lines have a dedicated wireless communication network environment for mobile terminal wireless access, and the mobile terminal is pre-registered in the network environment of each line.

[0137] The dedicated wireless communication network corresponding to the access target line comprises:

[0138] The target line is matched with the preset line-wireless network access parameter mapping database to obtain the wireless network access parameter of the target line;

[0139] The mobile terminal automatically accesses the dedicated wireless communication network according to the wireless network access parameter.

[0140] The broadcast system of the automatic access target location point comprises:

[0141] The target location point is matched with the preset location point-broadcast system access parameter mapping database to obtain the broadcast system access parameter of the target location point;

[0142] The mobile terminal initiates an access request to the broadcast system corresponding to the target location point according to the broadcast system access parameter in the dedicated wireless communication network;

[0143] The broadcast system receives the request and authorizes the mobile terminal to access; the mobile terminal initiates voice broadcast, and sends the voice data stream to the broadcast system host of the target location point in real time through IP multicast or unicast; the broadcast system receives the voice data and decodes it into an audio signal, and transmits the audio signal to the broadcast area to complete the broadcast voice broadcast.

[0144] The special processing module adopts a special scene processing strategy when the fusion judgment fails, comprising:

[0145] If the terminal is in a single candidate line signal overlapping area, the positioning information weight is increased, and the network and broadcast system corresponding to the positioning optimal candidate cell are selected for access;

[0146] If the terminal is in a plurality of candidate line signal overlapping areas, the cell information weight is increased, and the network and broadcast system corresponding to the candidate cell with the best signal strength quality are selected for access.

[0147] In any overlapping scene, the mobile terminal can receive user manual line selection instructions through the man-machine interface, and when the instructions are received, the terminal preferentially accesses the corresponding network and broadcast system according to the user specified line to meet the user's demand.

[0148] The refresh module is used to refresh the man-machine interface and display the current access network and broadcast channel state in real time.

Claims

1. A smart access broadcast method based on wireless communication, characterized in that, include: Collect location information and wireless cell information of surrounding base stations; The location information is matched with a preset geographic information database to obtain a preliminary location area, and the wireless cell information is matched with a preset cell information-geographic location mapping database to obtain a candidate set of lines and location points corresponding to each candidate cell. The candidate set includes candidate lines and candidate location points. A weighted decision algorithm is used to fuse and judge the route and location information mapped to each candidate cell in the preliminary location area, and to calculate the target route and target location that the terminal is most likely to be in. The step of using a weighted decision algorithm to fuse and determine the route and location information mapped to the preliminary location area and each candidate cell includes: For each candidate route and candidate location point in the candidate set, calculate the position matching degree between the candidate location point and the preliminary location area; calculate the straight-line distance between the candidate location point and a preset reference point in the preliminary location area, and calculate the position matching degree based on the straight-line distance according to a preset linear decay function; Obtain the signal strength quality value of the wireless cell corresponding to the candidate; the signal strength quality value is calculated by weighted fusion of the reference signal received power and the reference signal received quality of the corresponding wireless cell; The location matching degree is weighted using a preset location weighting factor, and the signal strength quality value is weighted using a preset cell weighting factor; the weighted results are summed to obtain the comprehensive score of the candidate. The comprehensive score calculation formula is as follows: Overall score = Location matching degree × Positioning weight + Signal strength quality value × Cell weight; The candidate with the highest overall score is selected as the fusion judgment result; if the highest score exceeds the preset threshold, the fusion judgment is judged to be successful; otherwise, the fusion judgment is judged to be unsuccessful. The location matching degree is calculated in the following way: determining a reference point P within the preliminary position area ref , said reference point being any one of a center point, a barycenter point of the area, or a nearest point on a center line having a directionality in the area; calculating a candidate position point P candidate a straight line distance D to a reference point P ref ; the smaller the straight line distance, the higher the position matching degree Calculating the matching score using a linear decay function: Substituting the distance D into the linear decay function yields the matching score S. position The formula is S position =max(0,1-D / D max ); Among them, D max It is the preset maximum effective distance; when D=0, S position The score is 1; when D≥D max At that time, S position The score is 0; The signal strength quality value is calculated in the following way: Calculate the normalized value N of the reference signal received power (RSRP) and the reference signal received quality (RSRQ) for the corresponding wireless cell. rsrp and N rsrq The formula is: N rsrp =(RSRP-RSRP min ) / (RSRP max -RSRP min ); N rsrq =(RSRQ-RSRQ min ) / (RSRQ max -RSRQ min ); Among them, RSRP max and RSRP min These are the preset best and worst thresholds for RSRP; RSRQ max and RSRQ min These are the preset best and worst RSRQ thresholds; The weighted fusion calculation of signal strength quality value is based on the formula: Signal strength quality value = α × N rsrp +β×N rsrq ; Where α and β are N rsrp and N rsrq The weighting coefficients, and α+β=1; If the fusion judgment is successful, a network registration request will be automatically initiated. First, the network will be connected to the dedicated wireless communication network corresponding to the target line, and then the network will be connected to the broadcast system of the target location. If the fusion judgment is unsuccessful, a special scenario handling strategy will be executed. The special scenario handling strategies include: If the terminal is in an area where the signals of a single candidate line overlap, the weight of the positioning information is increased, and the network and broadcast system corresponding to the candidate cell with the best positioning is selected for access. If the terminal is located in an area where multiple candidate line signals overlap, the cell information weight is increased, and the network and broadcast system corresponding to the candidate cell with the best signal strength and quality is selected for access.

2. The intelligent access broadcast method based on wireless communication according to claim 1, characterized in that, The location information is acquired via GPS or BDS; the wireless cell information includes cell identifier ECGI / PCI, absolute frequency number EARFCN, reference signal received power RSRP / SS-RSRP, and reference signal received quality RSRQ.

3. The intelligent access broadcast method based on wireless communication according to claim 2, characterized in that, The dedicated wireless communication network corresponding to the access target line includes: Match the target line with the preset line-wireless network access parameter mapping database to obtain the wireless network access parameters of the target line; The mobile terminal automatically connects to the dedicated wireless communication network based on the wireless network access parameters.

4. The intelligent access broadcast method based on wireless communication according to claim 3, characterized in that, The automatic access broadcast system to the target location includes: The target location point is matched with a preset location point-broadcast system access parameter mapping database to obtain the broadcast system access parameters of the target location point; The mobile terminal initiates an access request to the broadcast system corresponding to the target location point in the dedicated wireless communication network according to the broadcast system access parameters. The broadcast system receives the request and authorizes the mobile terminal to access; the mobile terminal initiates a voice broadcast, sending the voice data stream to the broadcast system host at the target location in real time via IP multicast or unicast; the broadcast system receives the voice data and decodes it into an audio signal, transmitting the audio signal to the broadcast area to complete the broadcast voice announcement.

5. The intelligent access broadcast method based on wireless communication according to claim 4, characterized in that, In any overlapping scenario, the mobile terminal receives a manual line selection command from the user through the human-computer interaction interface. When the command is received, the terminal prioritizes accessing the corresponding network and broadcast system according to the line specified by the user.

6. A smart access broadcast system based on wireless communication, characterized in that, include: The data acquisition module is used to collect location information and wireless cell information of surrounding base stations; The matching module is used to match the location information with a preset geographic information database to obtain a preliminary location area, and to match the wireless cell information with a preset cell information-geographic location mapping database to obtain a candidate set of lines and location points corresponding to each candidate cell. The candidate set includes candidate lines and candidate location points. The fusion judgment module is used to perform fusion judgment on the line and location information mapped to the preliminary location area and each candidate cell using a weighted decision algorithm, and calculate the target line and target location point that the terminal is most likely to be in at present. The step of using a weighted decision algorithm to fuse and determine the route and location information mapped to the preliminary location area and each candidate cell includes: For each candidate route and candidate location point in the candidate set, calculate the position matching degree between the candidate location point and the preliminary location area; calculate the straight-line distance between the candidate location point and a preset reference point in the preliminary location area, and calculate the position matching degree based on the straight-line distance according to a preset linear decay function; Obtain the signal strength quality value of the wireless cell corresponding to the candidate; the signal strength quality value is calculated by weighted fusion of the reference signal received power and the reference signal received quality of the corresponding wireless cell; The location matching degree is weighted using a preset location weighting factor, and the signal strength quality value is weighted using a preset cell weighting factor; the weighted results are summed to obtain the comprehensive score of the candidate. The comprehensive score calculation formula is as follows: Overall score = Location matching degree × Positioning weight + Signal strength quality value × Cell weight; The candidate with the highest overall score is selected as the fusion judgment result; if the highest score exceeds the preset threshold, the fusion judgment is judged to be successful; otherwise, the fusion judgment is judged to be unsuccessful. The location matching degree is calculated in the following way: Determine a reference point P within the initial location area. ref The reference point is any one of the following: the center point of the region, the centroid point, or the nearest point on the directional center line of the region. Calculate candidate location point P candidate To reference point P ref The straight-line distance D; the smaller the straight-line distance, the higher the position matching degree; Calculating the matching score using a linear decay function: Substituting the distance D into the linear decay function yields the matching score S. position The formula is S position =max(0,1-D / D max ); Among them, D max It is the preset maximum effective distance; when D=0, S position The score is 1; when D≥D max At that time, S position The score is 0; The signal strength quality value is calculated in the following way: Calculate the normalized value N of the reference signal received power (RSRP) and the reference signal received quality (RSRQ) for the corresponding wireless cell. rsrp and N rsrq The formula is: N rsrp =(RSRP-RSRP min ) / (RSRP max -RSRP min ); N rsrq =(RSRQ-RSRQ min ) / (RSRQ max -RSRQ min ); Among them, RSRP max and RSRP min These are the preset best and worst thresholds for RSRP; RSRQ max and RSRQ min These are the preset best and worst RSRQ thresholds; The weighted fusion calculation of signal strength quality value is based on the formula: Signal strength quality value = α × N rsrp +β×N rsrq ; Where α and β are N rsrp and N rsrq The weighting coefficients, and α+β=1; The broadcast access module is used to automatically initiate a network registration request if the fusion judgment is successful. It first accesses the dedicated wireless communication network corresponding to the target line, and then automatically accesses the broadcast system of the target location. A special processing module is used to execute special scenario processing strategies if the fusion judgment fails. The special scenario handling strategies include: If the terminal is in an area where the signals of a single candidate line overlap, the weight of the positioning information is increased, and the network and broadcast system corresponding to the candidate cell with the best positioning is selected for access. If the terminal is located in an area where multiple candidate line signals overlap, the cell information weight is increased, and the network and broadcast system corresponding to the candidate cell with the best signal strength and quality is selected for access.

7. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 5.

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