32 results about "Basic safety message" patented technology

A roadside infrastructure system configured to generate and broadcast basic safety message data to augment vehicle safety applications. In one example, a roadside module of the system includes a camera, video analytics to process images from the camera to detect vehicles, a BSM generator that generates a BSM for each detected vehicle, and an antenna for broadcasting the BSM. In another example, the roadside module is configured to detect BSM data generated by equipped vehicles, to determine whether any detected vehicles are equipped vehicles generating their own BSM data, and to generate a BSM only for unequipped detected vehicles.

This presentation provides methods to track pedestrians heading angle using smart phone data. Tracking heading angle especially at or from stationary position is key for pedestrian safety, e.g., for smart cross system and pedestrian collision mitigation system. It provides pedestrian-to-vehicle (P2V) platform. It deploys smart phones or mobile devices, equipped with DSRC (Dedicated short range communication) support, to act as beacons for pedestrians: Phone can alert driver to pedestrian presence in path; Pedestrian Basic Safety Message (BSM) can aid awareness for vehicles; It can be used for bicycles, as well. It also provides pedestrian-to-infrastructure (P2I) platform. Smart phone, through DSRC / cellular, transmits pedestrian presence to crosswalks / signals: It enables advanced crosswalk lighting / warning scheme; It enables bundling of pedestrian presence to vehicles. In this presentation, we provide various examples and variations on these.

The invention discloses an intersection vehicle speed guiding method and device, and is applied to the field of vehicle operation control, and the method comprises the steps: obtaining the basic safety information of a main vehicle and a target far vehicle; judging whether a first vehicle speed recommendation condition is met or not according to the basic safety messages of the main vehicle and the target far vehicle; if yes, according to the basic safety information of the main vehicle and the target far vehicle, determining the first time when the main vehicle arrives at the driving intersection point and the second time when the target far vehicle arrives at the driving intersection point; and determining a single recommended vehicle speed for the main vehicle according to the first time and the second time. According to the invention, more accurate and reliable vehicle speed guidance at the intersection without traffic lights is realized.

A method of assisting a driver of a first vehicle to find an empty parking space, the method including: receiving at the first vehicle V2V communications from at least one other vehicle within a parking area of interest for the first vehicle; analyzing the received V2V communications from the at least one other vehicle to determine potential available parking spaces in the parking area of interest; displaying on a display in the first vehicle one or more available parking spaces in the parking area of interest. The V2V communications comprise dedicated short-range communications (DSRC) technology that includes broadcasting a basic safety message (BSM) up to ten times per second, each BSM indicating a vehicle location, a vehicle heading, and a vehicle speed of the vehicle transmitting the BSM.

The invention discloses a TDMA-based basic security message broadcasting method for differential power in Internet of Vehicles. The method comprises the following steps: a communication node broadcasts basic security data messages in a staggered manner through different transmitting powers; after the cooperative node receives the basic security data message broadcast by the neighbor node, potential time slot use conflicts of the neighbor node are detected, and when the potential time slot use conflicts exist in the neighbor node, the cooperative node sends conflict reminding information to thedetected potential time slot use conflicts; the potential time slot uses a conflict node to change the transmit power order or select a new time slot for use.

This application provides an information transmission method based on the Internet of Vehicles and related equipment, which can enable the first terminal to successfully generate a BSM, so that the second terminal can receive the BSM from the first terminal, and determine the location of the first terminal based on the BSM. The method of the present application includes: the first terminal obtains the encrypted coordinate value of the first terminal; the first terminal generates the first coordinate value and the second coordinate value according to the encrypted coordinate value; the first terminal generates the first coordinate value and the second coordinate value according to the first coordinate value and the second coordinate value The two-coordinate value generates a basic safety message BSM. The BSM includes a mandatory field and an optional field. The mandatory field is used to indicate the first coordinate value, and the optional field is used to indicate the second coordinate value. The first coordinate value corresponds to the required field. range of values; the first terminal sends a BSM to the second terminal; the second terminal determines the encrypted coordinate value according to the first coordinate value indicated by the mandatory field and the second coordinate value indicated by the optional field; The encrypted coordinate value is decrypted to obtain the decrypted coordinate value of the first terminal.

The present application discloses a method for detecting a forward collision. A safety system for a motor vehicle includes: a dedicated radio to receive and transmit status data between a host vehicle and a remote vehicle; a global positioning system (GPS) receiver; an on-board unit (OBE) to perform vehicle-to-vehicle (V2V ) communication such that the host vehicle receives status information of the remote vehicle in a Basic Safety Message (BSM) format; and a safety control unit. Specifically, the safety control unit receives the status data of the host vehicle and the remote vehicle, calculates the distance, estimates the horizon time, and then compares the estimated horizon time with the driver's reaction time to generate a warning to the driver. More specifically, when the subtracted estimated time-to-horizon is greater than zero, the safety control unit executes an estimate routine to determine variable coefficients for estimating future positions and velocities of the host vehicle and the remote vehicle.

The invention relates to a joint power and contention window size adaptive control (joint Power and Contention window size Adaptive Control, PCAC) algorithm for security applications in the Internet of Vehicles. Dynamically adjust transmission power based on local vehicle density estimation to resolve the conflict between transmission range and interference; zero contention window, minislot method combined with receiver-based implicit acknowledgment mechanism is used to ensure preemptive priority and reliable transmission of emergency messages ; The node estimates the collision rate according to the data packets received from the neighbor nodes. Based on the estimated collision rate, the coarse-tuning and fine-tuning methods are used to adjust the contention window size of the basic security message to improve the throughput of the system. The PCAC algorithm adopts a distributed method without additional communication costs. Through a large number of simulation experiments, it is proved that PCAC can significantly improve the data packet delivery rate and throughput of security services, and reduce transmission delay.

The invention provides a vehicle pseudonym replacement method, device and computer-readable storage medium. The method includes that when the vehicle enters the vehicle-mounted self-organizing network, a trusted third party registers the vehicle to obtain a pseudonym and a certificate; the trusted third party registers the base station and the roadside unit to obtain a public key and a private key, and the base station calculates an effective The public key of the base station; when the vehicle enters the signal coverage of the roadside unit, the vehicle and the roadside unit confirm each other's legitimacy; the vehicle applies to the base station through the roadside unit, and obtains a valid pseudonym, certificate and Base station key; if the vehicle is in a driving state, the vehicle will periodically broadcast basic security messages, and pseudonyms will be replaced according to the driving state of nearby vehicles. In this way, without the participation of RSU, the legal pseudonym certificate can be independently calculated through cooperation with the surrounding vehicles; the vehicle can independently judge the conditions of pseudonym change, and enhance the security of the subsequent pseudonym replacement protocol.

The invention discloses an adaptive feedback control method of Basic Safety Message (BSM) in Cooperative Vehicle Safety System (Cooperative Vehicle Safety System, CVSSs). situation, hide the impact of the terminal and the channel bit error rate, and calculate the information dissemination rate (Information Dissemination Rate, IDR) to provide the basis for the prediction model; use the prediction model to give the idealized network performance, and the ideal network state is regarded as To obtain the maximum IDR, the ideal IDR is used as a benchmark to guide the BSM rate adaptive feedback control; the feedback rate control model is used to make the error between the ideal IDR and the actual IDR converge to zero. Compared with the prior art, the present invention fully considers the factors that adversely affect IDR, can improve the real-time vehicle tracking accuracy in different vehicle networking environments and network environments, and improve the robustness of CVSSs under different interference effects.

An apparatus for authenticating a vehicle in a vehicle-to-vehicle communication environment, comprising: a communication unit configured to receive a basic security message and an authentication message from a remote vehicle permitted to participate in the vehicle-to-vehicle communication; and a controller configured to act as the communication unit The remote vehicle is determined to be authentic when at least a predetermined number of authentication messages are received from the remote vehicle within a predetermined period of time, and when the controller determines that the remote vehicle is authentic, permission is generated to utilize the basic security message received from the remote vehicle.