A WiFi Aware-based traffic signal control system and method for emergency passage of vehicles and pedestrians

Abstract

This invention discloses a vehicle and pedestrian emergency passage traffic signal control system and method based on WiFi Aware, relating to the fields of traffic signal control and intelligent traffic management technology. The system includes a proximity communication management module, an emergency passage request module, a request filtering module, an identity authentication and credit assessment module, a signal control strategy decision module, and a signal control and recording management module. This invention utilizes WiFi Aware technology to establish direct communication between terminal devices and traffic signal controllers, achieving second-level response for emergency passage; combined with identity binding, credit assessment, and a full-process recording mechanism, it ensures safe, traceable, and abusive passage.

Description

Technical Field

[0001] This invention relates to the field of traffic signal control and intelligent traffic management technology, and in particular to a traffic signal control system and method for emergency passage of vehicles and pedestrians based on WiFi Aware. Background Technology

[0002] With increasing urban traffic pressure, social vehicles and pedestrians often have difficulty passing through traffic light intersections in time when encountering emergencies in daily traffic (such as pregnant women being taken to the hospital, emergency medical care for sudden illnesses, or emergency travel for fire or police), which delays emergency passage time and affects public safety and emergency rescue efficiency.

[0003] In existing technologies, emergency passage priority control typically relies on the following solutions: Dedicated communication equipment solutions: such as vehicle-to-traffic signal communication systems based on DSRC (Dedicated Short Range Communication) or C-V2X (Cellular Vehicle-to-Everything). These solutions require dedicated hardware to be installed on vehicles and traffic lights, resulting in high deployment costs and difficulty in widespread adoption. Back-end dispatch solutions: Some cities utilize back-end traffic management systems for emergency vehicle signal control, but these have the following shortcomings: slow response time, unable to complete request and signal switching within seconds; difficulties in identity authentication and accountability, making it impossible to prevent abuse of emergency passage privileges; and a lack of ability to manage the passage of ordinary vehicles and pedestrians, failing to accommodate multiple types of emergency passage needs.

[0004] Therefore, existing technologies cannot simultaneously meet the needs of low cost, rapid response, traceable identity, and support for emergency traffic management of social vehicles and pedestrians. A new technological solution is urgently needed to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, this invention provides a WiFi Aware-based emergency traffic signal control system for vehicles and pedestrians to solve the problems of slow emergency response, reliance on dedicated equipment, untraceable identities, and inability to simultaneously accommodate social vehicles and pedestrians in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, embodiments of the present invention provide a vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware, including: a proximity communication management module, used by the traffic signal controller to discover signals by publishing services through WiFi Aware proximity sensing communication, and to dynamically adjust the proximity discovery window density according to the current signal cycle state of the traffic light; An emergency passage request module is used for the terminal device to receive the service discovery signal and establish a direct communication link with the traffic signal controller through WiFi Aware, and send an emergency passage request to the traffic signal controller. The emergency passage request includes user identification, terminal device location information, request timestamp, and urgency information. The request filtering module is used for the traffic signal controller to receive the emergency passage request, obtain the RSSI value received by the terminal device, and determine the validity of the emergency passage request according to a preset RSSI threshold. The identity authentication and credit assessment module is used to send the emergency passage request to the background management server for identity authentication and credit rating assessment when the emergency passage request passes the validity determination. The background management server generates the corresponding credit rating and returns the passage permission result. The signal control strategy decision module is used by the traffic signal controller to determine the corresponding signal control strategy based on the credit rating and the current traffic signal phase state. The signal control and recording management module is used by the traffic signal controller to control the phase of traffic lights according to the signal control strategy and generate corresponding traffic records to be sent to the background management server for storage.

[0008] As a preferred embodiment of the WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system of the present invention, the method includes: dynamically adjusting the density of the proximity detection window according to the current signal cycle state of the traffic light, including: Obtain the current signal phase state and remaining phase time of the traffic light, and adjust the WiFi Aware-based proximity discovery window broadcast period according to the signal phase state, wherein: If the traffic light is in the red phase, the broadcast cycle of the nearest detection window will be shortened. If the traffic light is in the green phase, the default broadcast cycle will be restored. If the traffic light is in the yellow phase, the default broadcast cycle is maintained.

[0009] As a preferred embodiment of the vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware described in this invention, the terminal device receives the service discovery signal and establishes a direct communication link with the traffic signal controller through WiFi Aware, including: The terminal equipment scans for the service discovery signals periodically broadcast by the traffic signal controller; The service name and device identification information in the service discovery signal are parsed. When the service name matches the preset emergency passage service identifier, a service subscription request is sent to the traffic signal controller. After receiving the service subscription request, the traffic signal controller returns service confirmation information to the terminal device and assigns a corresponding data communication session identifier.

[0010] As a preferred embodiment of the WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system of the present invention, the traffic signal controller receives the emergency passage request, obtains the RSSI value received by the terminal device, and determines the validity of the emergency passage request according to a preset RSSI threshold, including: The traffic signal controller receives an emergency passage request sent by the terminal device and obtains the received RSSI value corresponding to the data frame sent by the terminal device through the communication interface; The RSSI value is compared with a preset RSSI threshold. If the RSSI value is greater than or equal to the preset RSSI threshold, the terminal device is determined to be within the effective communication range of the traffic signal controller, and the emergency passage request is determined to be a valid request. If the RSSI value is less than the preset RSSI threshold, the emergency passage request will be marked as an invalid request and subsequent processing will be terminated.

[0011] As a preferred embodiment of the WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system of the present invention, wherein: when the emergency passage request passes the validity determination, the traffic signal controller sends the emergency passage request to the background management server for identity authentication and credit rating assessment, including: The traffic signal controller sends the emergency passage request to the back-end management server through a secure communication interface; After receiving the emergency passage request, the backend management server parses the terminal device identity identifier in the message and performs identity authentication based on the pre-registered user information database; The backend management server generates a credit rating corresponding to the terminal device based on the identity information and historical passage records, and returns the credit rating and passage permission information to the traffic signal controller.

[0012] As a preferred embodiment of the WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system of the present invention, the traffic signal controller determines a corresponding signal control strategy based on the credit rating and the current traffic signal phase state, including: Obtain the current traffic light signal phase status and remaining time, including red, green, and yellow light phase information; determine the signal control strategy based on the terminal device's credit rating and the current signal phase status. If the credit rating is A and the current signal is in a red phase or about to switch to a red phase, the current green phase is extended to a preset time, and priority switching to the direction of the terminal device is given in the next signal cycle; if the credit rating is B, passage is allowed according to the standard signal control cycle, without additional extension or priority switching; if the credit rating is C and the current phase is red or about to end, passage is delayed until the end of the current phase, and passage is allowed in the normal order in the next cycle; if the credit rating is D, the priority passage policy is refused, the current signal phase is not adjusted, and the violation request information is recorded. The system calculates the switching time and duration of the traffic lights in the direction of the terminal device, generates a signal control command from the calculation results, and sends the signal control command to the traffic light control hardware interface to execute the corresponding signal light switching action.

[0013] As a preferred embodiment of the WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system of the present invention, the traffic signal controller controls the traffic light phases according to the signal control strategy and generates corresponding passage records to be sent to the background management server for storage, including: Traffic light control instructions are generated according to the signal control strategy, including target phase, switching time and duration; The traffic light control command is sent to the traffic light for execution through the control hardware interface, so that the traffic light switches the corresponding phase according to the strategy. After the terminal device completes passage through the intersection, the traffic signal controller automatically generates a passage record, which includes: the unique identifier of the terminal device, the timestamp of the passage request, the start and end times of the traffic light switching, the passage permit ID, the credit rating of the terminal device, and the intersection coordinates.

[0014] Secondly, embodiments of the present invention provide a traffic signal control method for emergency passage of vehicles and pedestrians based on WiFi Aware, including: The traffic signal controller discovers signals through WiFi Aware proximity sensing communication and dynamically adjusts the proximity discovery window density according to the current signal cycle status of the traffic lights. The terminal device receives the service discovery signal and establishes a direct communication link with the traffic signal controller through WiFi Aware, and sends an emergency passage request to the traffic signal controller. The emergency passage request includes user identification, terminal location information, request timestamp, and urgency information. The traffic signal controller receives the emergency passage request and obtains the RSSI value received by the terminal device, and determines the validity of the emergency passage request according to a preset RSSI threshold. When the emergency passage request passes the validity determination, the traffic signal controller sends the emergency passage request to the background management server for identity authentication and credit rating assessment. The background management server generates the corresponding credit rating and returns the passage permission result. The traffic signal controller determines the corresponding signal control strategy based on the credit rating and the current traffic signal phase state. The traffic signal controller controls the phase of the traffic lights according to the signal control strategy and generates corresponding passage records, which are then sent to the back-end management server for storage.

[0015] Thirdly, embodiments of the present invention provide a computer device, including a memory and a processor, wherein the memory stores a computer program, wherein: when the computer program instructions are executed by the processor, they implement the steps of a WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system as described in the first aspect of the present invention.

[0016] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, wherein: when the computer program instructions are executed by a processor, they implement the steps of a WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system as described in the first aspect of the present invention.

[0017] The beneficial effects of this invention are as follows: This invention establishes direct communication between terminal devices and traffic signal controllers by utilizing WiFi Aware technology, enabling second-level response for emergency passage; combined with identity binding, credit assessment, and full-process recording mechanisms, it ensures safe, traceable, and abusive passage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the system structure of the present invention;

[0020] Figure 2 This is a flowchart of the method of the present invention. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0024] Reference Figures 1-2 This is the first embodiment of the present invention. This embodiment provides a vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware. The system consists of a proximity communication management module, an emergency passage request module, a request filtering module, an identity authentication and credit assessment module, a signal control strategy decision module, and a signal control and recording management module.

[0025] Specifically, the proximity communication management module is used by the traffic signal controller to discover signals through WiFi Aware proximity sensing communication services, and to dynamically adjust the proximity discovery window density according to the current signal cycle status of the traffic lights.

[0026] Furthermore, the current signal phase state and remaining phase time of the traffic light are obtained, and the broadcast period of the WiFi Aware-based proximity discovery window is adjusted according to the signal phase state, wherein: If the traffic light is in the red phase, the broadcast cycle of the nearest detection window will be shortened. If the traffic light is in the green phase, the default broadcast cycle will be restored. If the traffic light is in the yellow phase, the default broadcast cycle is maintained.

[0027] It should be noted that, in this embodiment, the proximity communication management module is used to realize proximity sensing communication between the traffic signal controller and the terminal device based on WiFi Aware, and to enable the terminal device near the intersection to discover the emergency passage service provided by the traffic signal controller by publishing service discovery signals.

[0028] Furthermore, the proximity communication management module first obtains the current signal phase state of the traffic light and the remaining time of that phase, and adjusts the WiFi Aware-based proximity discovery window broadcast period according to the signal phase state. Specifically, when the traffic light is in the red phase, the proximity communication management module shortens the proximity discovery window broadcast period to increase the probability of the terminal device discovering the traffic signal controller service during the red light waiting phase; when the traffic light is in the green phase, the proximity communication management module restores the proximity discovery window broadcast period to the preset default broadcast period; when the traffic light is in the yellow phase, the proximity communication management module keeps the default broadcast period unchanged.

[0029] For example, in one specific implementation, the default broadcast period of the proximity discovery window can be set to 200ms. When the traffic light enters the red phase, the proximity communication management module can adjust the broadcast period to 100ms, thereby improving the success rate of the terminal device scanning the service discovery signal. When the traffic light enters the green or yellow phase, the default 200ms broadcast period is restored. In this way, without increasing the system communication burden, the terminal device can more easily discover the emergency passage service provided by the traffic signal controller while waiting for the red light.

[0030] Specifically, the emergency passage request module is used by the terminal device to receive the service discovery signal and establish a direct communication link with the traffic signal controller through WiFiAware, and send an emergency passage request to the traffic signal controller. The emergency passage request includes user identification, terminal device location information, request timestamp, and urgency information.

[0031] Furthermore, the terminal equipment scans the service discovery signals periodically broadcast by the traffic signal controller; The service name and device identification information in the service discovery signal are parsed. When the service name matches the preset emergency passage service identifier, a service subscription request is sent to the traffic signal controller. After receiving the service subscription request, the traffic signal controller returns service confirmation information to the terminal device and assigns a corresponding data communication session identifier.

[0032] It should be noted that, in this embodiment, the emergency passage request module is used by the terminal device to establish a direct communication link with the traffic signal controller based on WiFi Aware after discovering the emergency passage service provided by the traffic signal controller, and to send an emergency passage request to the traffic signal controller through this communication link. The emergency passage request describes the terminal device's current emergency passage needs and may include fields such as user identification, terminal device location information, request timestamp, and urgency level information, for subsequent processing by the traffic signal controller.

[0033] Furthermore, the terminal device first enables the WiFi Aware proximity sensing communication function to scan the service discovery signals periodically broadcast by the traffic signal controller. Upon detecting the service discovery signal, it parses the service name and device identification information carried within it. When the parsed service name matches the emergency passage service identifier pre-configured in the terminal device, the terminal device sends a service subscription request to the traffic signal controller to request the establishment of a data communication connection.

[0034] Upon receiving the service subscription request, the traffic signal controller returns service confirmation information to the terminal device and assigns a corresponding data communication session identifier to the terminal device. The terminal device establishes a data communication link with the traffic signal controller based on the data communication session identifier, thus forming a point-to-point direct communication connection. Subsequently, the terminal device sends an emergency passage request to the traffic signal controller through this communication link. The request message may carry the terminal device's unique identifier, current location coordinates, request initiation time, and urgency level, among other information.

[0035] For example, in one specific implementation, the terminal device can be a smartphone or an in-vehicle terminal device. When a user triggers an emergency passage request in a mobile terminal application, the terminal device scans for emergency passage services published by nearby traffic signal controllers via WiFi Aware. After successfully establishing a communication connection, the terminal device sends an emergency passage request containing user identification, location information, request timestamp, and urgency information to the traffic signal controller for subsequent request validity determination and signal control strategy generation.

[0036] Specifically, the request filtering module is used by the traffic signal controller to receive the emergency passage request, obtain the RSSI value received by the terminal device, and determine the validity of the emergency passage request according to a preset RSSI threshold.

[0037] Furthermore, the traffic signal controller receives the emergency passage request and obtains the RSSI value received by the terminal device, and determines the validity of the emergency passage request according to a preset RSSI threshold, including: The traffic signal controller receives an emergency passage request sent by the terminal device and obtains the received RSSI value corresponding to the data frame sent by the terminal device through the communication interface; The RSSI value is compared with a preset RSSI threshold. If the RSSI value is greater than or equal to the preset RSSI threshold, the terminal device is determined to be within the effective communication range of the traffic signal controller, and the emergency passage request is determined to be a valid request. If the RSSI value is less than the preset RSSI threshold, the emergency passage request will be marked as an invalid request and subsequent processing will be terminated.

[0038] It should be noted that, in this embodiment, the request filtering module is used to perform preliminary validity screening of emergency passage requests sent by terminal devices, in order to avoid requests initiated by distant terminal devices or terminal devices not near intersections interfering with the traffic signal control system. The request filtering module obtains the RSSI value of the communication signal received by the terminal device and compares it with a preset RSSI threshold to determine whether the terminal device is within the effective communication range of the traffic signal controller.

[0039] Furthermore, when the traffic signal controller receives an emergency passage request from the terminal device, the request filtering module obtains the received RSSI value corresponding to the data frame sent by the terminal device through the communication interface. The RSSI value represents the signal strength measured by the traffic signal controller when receiving the wireless communication signal from the terminal device, and is used to reflect the approximate distance relationship between the terminal device and the traffic signal controller.

[0040] Subsequently, the request filtering module compares the RSSI value with a pre-set RSSI threshold in the system. When the RSSI value is greater than or equal to the RSSI threshold, the request filtering module determines that the terminal device is within the effective communication range of the traffic signal controller and identifies the emergency passage request as a valid request, thereby sending the request to the subsequent processing module for identity authentication and passage policy calculation; when the RSSI value is less than the RSSI threshold, the request filtering module determines that the terminal device is too far from the traffic signal controller or is not within the effective control area of ​​the current intersection, then marks the emergency passage request as an invalid request and terminates the subsequent processing procedure.

[0041] For example, in one specific implementation, the system can set the signal strength threshold to -65 dBm. When the traffic signal controller receives an emergency passage request data frame sent by the terminal device and detects an RSSI value of -58 dBm, since the RSSI value is greater than the RSSI threshold, the request filtering module determines that the terminal device is within the effective communication range near the intersection and allows the request to enter the subsequent identity authentication process. However, when the RSSI value is detected to be -80 dBm, since the RSSI value is lower than the RSSI threshold, it is determined that the terminal device is too far away or not within the intersection range, thus marking the request as an invalid request.

[0042] Specifically, the identity authentication and credit assessment module is used when the emergency passage request passes the validity determination. The traffic signal controller sends the emergency passage request to the back-end management server for identity authentication and credit rating assessment. The back-end management server generates the corresponding credit rating and returns the passage permission result.

[0043] Furthermore, the traffic signal controller sends the emergency passage request to the back-end management server through a secure communication interface; After receiving the emergency passage request, the backend management server parses the terminal device identity identifier in the message and performs identity authentication based on the pre-registered user information database; The backend management server generates a credit rating corresponding to the terminal device based on the identity information and historical passage records, and returns the credit rating and passage permission information to the traffic signal controller.

[0044] It should be noted that, in this embodiment, the identity authentication and credit assessment module is used to further verify the identity and assess the credit rating of emergency passage requests that have passed the validity determination, in order to determine whether the terminal device is qualified to apply for emergency passage. The identity authentication and credit assessment process is completed by the back-end management server. The traffic signal controller is responsible for sending the emergency passage request to the back-end management server and receiving the passage permission result returned by the server.

[0045] Furthermore, after the emergency passage request passes the validity determination by the request filtering module, the traffic signal controller sends the emergency passage request to the backend management server through a secure communication interface. In this embodiment, the secure communication interface can adopt a data communication method based on HTTPS or an encrypted transmission protocol to ensure the security of the terminal device's identity information and passage request data during transmission.

[0046] Upon receiving the emergency access request, the backend management server first parses the terminal device identifier in the message and then searches for the registered user information corresponding to the terminal device identifier in a pre-established user information database to complete the identity authentication process. The user information database stores user identity information, unique terminal device identifier information, and registration / authentication status data. If the terminal device identifier matches the registered user information in the database and the authentication status is valid, the identity authentication is considered successful; otherwise, if there is no match or the authentication status is abnormal, the identity authentication is considered to have failed.

[0047] After successful identity authentication, the backend management server further assesses the terminal device's credit rating based on its historical access records. Specifically, the backend management server retrieves information from the historical record database, including the terminal device's past emergency access request records, actual access records, and whether any abnormal or abusive requests exist. It then calculates the corresponding credit score according to pre-set credit scoring rules. For example, the terminal device's initial credit score can be set to 100 points. When the system detects a false emergency request, a certain number of points are deducted; when there are normal usage records in the history and no violations occur, the credit score is maintained or appropriately increased. Based on the final calculated credit score, the terminal device is classified into different credit levels.

[0048] Subsequently, the backend management server generates a passage permit result by combining the credit rating and passage permit information of the terminal device, and returns it to the traffic signal controller via the communication interface. After receiving the passage permit result, the traffic signal controller can execute the corresponding traffic signal control strategy based on the returned credit rating and permit information.

[0049] For example, in one specific implementation, when the backend management server detects that a terminal device's historical credit score is 95 points, it can rate its credit level as A and return a permission result to the traffic signal controller; if it detects that a terminal device has multiple abnormal request behaviors that cause its credit score to drop to 60 points, it can rate its credit level as C and restrict its passage requests according to the system's set rules.

[0050] Specifically, the signal control strategy decision module is used by the traffic signal controller to determine the corresponding signal control strategy based on the credit rating and the current traffic signal phase state.

[0051] Furthermore, the system obtains the current traffic light signal phase status and remaining time, including red, green, and yellow light phase information; and determines the signal control strategy based on the terminal device's credit rating and the current signal phase status. If the credit rating is A and the current signal is in a red phase or about to switch to a red phase, the current green phase is extended to a preset time, and priority switching to the direction of the terminal device is given in the next signal cycle; if the credit rating is B, passage is allowed according to the standard signal control cycle, without additional extension or priority switching; if the credit rating is C and the current phase is red or about to end, passage is delayed until the end of the current phase, and passage is allowed in the normal order in the next cycle; if the credit rating is D, the priority passage policy is refused, the current signal phase is not adjusted, and the violation request information is recorded. The system calculates the switching time and duration of the traffic lights in the direction of the terminal device, generates a signal control command from the calculation results, and sends the signal control command to the traffic light control hardware interface to execute the corresponding signal light switching action.

[0052] It should be noted that, in this embodiment, the signal control strategy decision module is used to determine the corresponding traffic signal control strategy based on the terminal device credit rating returned by the backend management server and the current signal phase status of the traffic lights, thereby realizing dynamic adjustment of the traffic light phase. This module allows for differentiated processing of emergency passage requests while ensuring basic traffic order at intersections.

[0053] Furthermore, the signal control strategy decision module first obtains the current signal phase status of the traffic light and the remaining time information of that phase. The signal phase status includes the red light phase, green light phase, and yellow light phase. This phase information can be provided in real time by the signal control program inside the traffic signal controller and used for subsequent signal control strategy calculations.

[0054] After acquiring the current signal phase status, the signal control strategy decision module executes a signal control strategy determination based on the terminal device's credit rating and the current signal phase status. When the terminal device's credit rating is A and the current signal is a red light or about to switch to a red light, the system prioritizes providing passage conditions for the terminal device. For example, while meeting traffic safety constraints, the system appropriately extends the current green light phase to a preset time and prioritizes switching to the passage phase in the terminal device's direction in the next signal cycle. When the terminal device's credit rating is B, the system releases traffic according to the standard signal control cycle, without additional extension or priority switching of the current signal phase. When the terminal device's credit rating is C and the current phase is a red light or about to end, the system delays the emergency passage request until the current phase ends and releases traffic in the normal order in the next signal cycle. When the terminal device's credit rating is D, the system refuses to execute the priority passage strategy, does not adjust the current traffic signal phase, and records the request for subsequent management.

[0055] After determining the appropriate control strategy, the signal control strategy decision module further calculates the traffic light switching time and duration in the direction of the terminal device, and generates corresponding signal control commands based on the calculation results. Subsequently, the traffic signal controller sends the signal control commands to the traffic signal execution unit through the traffic signal control hardware interface, thereby realizing the switching of traffic signal phases or the adjustment of duration.

[0056] For example, in one specific implementation, when the system detects that the terminal device's credit rating is A and the current intersection signal is in red phase with a long remaining red light time, the signal control strategy decision module can end the current phase early and switch to the green light phase in the direction of the terminal device after a safe interval to meet emergency passage needs; while when the system detects that the terminal device's credit rating is B, it maintains the current signal cycle unchanged and allows the terminal device to pass through the intersection when the signal cycle switches to the green light in that direction.

[0057] Specifically, the signal control and recording management module is used by the traffic signal controller to control the phase of traffic lights according to the signal control strategy, and to generate corresponding traffic records to be sent to the background management server for storage.

[0058] Furthermore, traffic light control instructions are generated according to the signal control strategy, including target phase, switching time, and duration; The traffic light control command is sent to the traffic light for execution through the control hardware interface, so that the traffic light switches the corresponding phase according to the strategy. After the terminal device completes passage through the intersection, the traffic signal controller automatically generates a passage record, which includes: the unique identifier of the terminal device, the timestamp of the passage request, the start and end times of the traffic light switching, the passage permit ID, the credit rating of the terminal device, and the intersection coordinates.

[0059] It should be noted that, in this embodiment, the signal control and record management module is used to actually control the phase of the traffic lights according to the signal control strategy generated by the aforementioned signal control strategy decision module, and to generate corresponding passage records after the terminal device completes passage, so as to carry out subsequent management and data storage.

[0060] Furthermore, the signal control and recording management module first generates traffic light control instructions based on the signal control strategy. These instructions include control parameters such as the target signal phase, the signal phase switching time, and the duration of the target phase. The traffic signal controller then constructs the corresponding signal control instructions based on these parameters and prepares to send them to the traffic light execution unit.

[0061] Subsequently, the traffic signal controller sends the traffic light control command to the traffic light execution device through the control hardware interface, so that the traffic light switches to the target phase according to the signal control strategy and maintains it for the corresponding duration, thereby providing passage conditions for the direction where the terminal device is located.

[0062] After the terminal device completes passage through the intersection, the signal control and recording management module automatically generates corresponding passage record information. The passage record may include data such as the terminal device's unique identifier, passage request timestamp, traffic light phase switching start and end times, system-generated passage permit ID, terminal device credit rating, and the coordinates of the corresponding intersection. This information is used to record emergency passage processes for subsequent querying, statistical analysis, and verification by traffic management departments.

[0063] For example, in one specific implementation, after the terminal device successfully passes through the intersection, the traffic signal controller can generate a complete passage record based on the system log and send the passage record to the backend management server for storage via a communication interface. Upon receiving the passage record, the backend management server can write it into the database system for subsequent use in passage history queries, user credit rating updates, and traffic management data analysis.

[0064] This embodiment also provides a WiFi Aware-based traffic signal control method for emergency passage of vehicles and pedestrians, including: The traffic signal controller discovers signals through WiFi Aware proximity sensing communication and dynamically adjusts the proximity discovery window density according to the current signal cycle status of the traffic lights. The terminal device receives the service discovery signal and establishes a direct communication link with the traffic signal controller through WiFi Aware, and sends an emergency passage request to the traffic signal controller. The emergency passage request includes user identification, terminal location information, request timestamp, and urgency information. The traffic signal controller receives the emergency passage request and obtains the RSSI value received by the terminal device, and determines the validity of the emergency passage request according to a preset RSSI threshold. When the emergency passage request passes the validity determination, the traffic signal controller sends the emergency passage request to the background management server for identity authentication and credit rating assessment. The background management server generates the corresponding credit rating and returns the passage permission result. The traffic signal controller determines the corresponding signal control strategy based on the credit rating and the current traffic signal phase state. The traffic signal controller controls the phase of the traffic lights according to the signal control strategy and generates corresponding passage records, which are then sent to the back-end management server for storage.

[0065] This embodiment also provides a computer device applicable to a WiFi Aware-based vehicle and pedestrian emergency traffic signal control system, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to implement the WiFi Aware-based vehicle and pedestrian emergency traffic signal control system proposed in the above embodiment.

[0066] The computer device can be a terminal, comprising a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0067] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements a WiFi Aware-based vehicle and pedestrian emergency passage traffic signal control system as proposed in the above embodiments.

[0068] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A WiFi Aware-based traffic signal control system for emergency passage of vehicles and pedestrians, characterized in that, include: The proximity communication management module is used by the traffic signal controller to discover signals through WiFi Aware proximity sensing communication services and dynamically adjust the proximity discovery window density according to the current signal cycle status of the traffic light. An emergency passage request module is used for the terminal device to receive the service discovery signal and establish a direct communication link with the traffic signal controller through WiFi Aware, and send an emergency passage request to the traffic signal controller. The emergency passage request includes user identification, terminal device location information, request timestamp, and urgency information. The request filtering module is used for the traffic signal controller to receive the emergency passage request, obtain the RSSI value received by the terminal device, and determine the validity of the emergency passage request according to a preset RSSI threshold. The identity authentication and credit assessment module is used to send the emergency passage request to the background management server for identity authentication and credit rating assessment when the emergency passage request passes the validity determination. The background management server generates the corresponding credit rating and returns the passage permission result. The signal control strategy decision module is used by the traffic signal controller to determine the corresponding signal control strategy based on the credit rating and the current traffic signal phase state. The signal control and recording management module is used by the traffic signal controller to control the phase of traffic lights according to the signal control strategy and generate corresponding traffic records to be sent to the background management server for storage.

2. The vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware as described in claim 1, characterized in that, The dynamic adjustment of the density of adjacent detection windows based on the current signal cycle state of the traffic lights includes: Obtain the current signal phase state and remaining phase time of the traffic light, and adjust the WiFi Aware-based proximity discovery window broadcast period according to the signal phase state, wherein: If the traffic light is in the red phase, the broadcast cycle of the nearest detection window will be shortened. If the traffic light is in the green phase, the default broadcast cycle will be restored. If the traffic light is in the yellow phase, the default broadcast cycle is maintained.

3. The vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware as described in claim 1, characterized in that, The terminal device receives the service discovery signal and establishes a direct communication link with the traffic signal controller via WiFi Aware, including: The terminal equipment scans for the service discovery signals periodically broadcast by the traffic signal controller; The service name and device identification information in the service discovery signal are parsed. When the service name matches the preset emergency passage service identifier, a service subscription request is sent to the traffic signal controller. After receiving the service subscription request, the traffic signal controller returns service confirmation information to the terminal device and assigns a corresponding data communication session identifier.

4. A vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware as described in claim 1, characterized in that, The traffic signal controller receives the emergency passage request and obtains the RSSI value received by the terminal device. It then determines the validity of the emergency passage request based on a preset RSSI threshold, including: The traffic signal controller receives an emergency passage request sent by the terminal device and obtains the received RSSI value corresponding to the data frame sent by the terminal device through the communication interface; The RSSI value is compared with a preset RSSI threshold. If the RSSI value is greater than or equal to the preset RSSI threshold, the terminal device is determined to be within the effective communication range of the traffic signal controller, and the emergency passage request is determined to be a valid request. If the RSSI value is less than the preset RSSI threshold, the emergency passage request will be marked as an invalid request and subsequent processing will be terminated.

5. A vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware as described in claim 1, characterized in that, When the emergency passage request passes the validity determination, the traffic signal controller sends the emergency passage request to the backend management server for identity authentication and credit rating assessment, including: The traffic signal controller sends the emergency passage request to the back-end management server through a secure communication interface; After receiving the emergency passage request, the backend management server parses the terminal device identity identifier in the message and performs identity authentication based on the pre-registered user information database; The backend management server generates a credit rating corresponding to the terminal device based on the identity information and historical passage records, and returns the credit rating and passage permission information to the traffic signal controller.

6. A vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware as described in claim 1, characterized in that, The traffic signal controller determines a corresponding signal control strategy based on the credit rating and the current traffic signal phase state, including: Obtain the current traffic light signal phase status and remaining time, including red, green, and yellow light phase information; determine the signal control strategy based on the terminal device's credit rating and the current signal phase status. If the credit rating is A and the current signal is in a red phase or about to switch to a red phase, the current green phase is extended to a preset time, and priority switching to the direction of the terminal device is given in the next signal cycle; if the credit rating is B, passage is allowed according to the standard signal control cycle, without additional extension or priority switching; if the credit rating is C and the current phase is red or about to end, passage is delayed until the end of the current phase, and passage is allowed in the normal order in the next cycle; if the credit rating is D, the priority passage policy is refused, the current signal phase is not adjusted, and the violation request information is recorded. The system calculates the switching time and duration of the traffic lights in the direction of the terminal device, generates a signal control command from the calculation results, and sends the signal control command to the traffic light control hardware interface to execute the corresponding signal light switching action.

7. A vehicle and pedestrian emergency passage traffic signal control system based on WiFi Aware as described in claim 1, characterized in that, The traffic signal controller controls the phase of the traffic lights according to the signal control strategy and generates corresponding passage records, which are then sent to the backend management server for storage, including: Traffic light control instructions are generated according to the signal control strategy, including target phase, switching time and duration; After the terminal device completes passage through the intersection, the traffic signal controller automatically generates a passage record, which includes: the unique identifier of the terminal device, the timestamp of the passage request, the start and end times of the traffic signal light switching, the passage permit ID, the credit rating of the terminal device, and the intersection coordinates.

8. A traffic signal control method for emergency passage of vehicles and pedestrians based on WiFi Aware, characterized in that, include: The traffic signal controller discovers signals through WiFi Aware proximity sensing communication and dynamically adjusts the proximity discovery window density according to the current signal cycle status of the traffic lights. The terminal device receives the service discovery signal and establishes a direct communication link with the traffic signal controller through WiFi Aware, and sends an emergency passage request to the traffic signal controller. The emergency passage request includes user identification, terminal location information, request timestamp, and urgency information. The traffic signal controller receives the emergency passage request and obtains the RSSI value received by the terminal device, and determines the validity of the emergency passage request according to a preset RSSI threshold. When the emergency passage request passes the validity determination, the traffic signal controller sends the emergency passage request to the background management server for identity authentication and credit rating assessment. The background management server generates the corresponding credit rating and returns the passage permission result. The traffic signal controller determines the corresponding signal control strategy based on the credit rating and the current traffic signal phase state. The traffic signal controller controls the phase of the traffic lights according to the signal control strategy and generates corresponding passage records, which are then sent to the back-end management server for storage.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the WiFi Aware-based vehicle and pedestrian emergency traffic signal control system as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the WiFi Aware-based vehicle and pedestrian emergency traffic signal control system as described in any one of claims 1 to 7.

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