V2X-based voice broadcast message method

Abstract

The invention discloses a V2X-based voice broadcast message method, the message comprises a BVM message, and the message generation and broadcast process comprises the following steps: S1, voice input; collecting voice information in the vehicle, wherein the voice information is subjected to data coding and data packaging; s2, transmitting the compressed and packaged data through V2X in a broadcast mode; step S3, voice output; and receiving the data transmitted through the V2X at a receiving end, and completing voice output after data decoding and data filtering. The method has the advantages of simple principle, simplicity and convenience in operation, wide application range and the like.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of vehicle networking, and in particular to a method for voice broadcasting messages based on V2X. Background Art

[0002] In today's rapidly developing field of Internet of Vehicles technology, V2X (Vehicle to X), which is the data exchange between vehicles and any external entity, can realize vehicle-road collaboration and intelligent transportation. It effectively improves road safety and traffic efficiency by sharing key information such as vehicle location, speed and direction, traffic events, etc. in real time. Although V2X performs well in regular traffic conditions, it lacks a direct communication method between vehicles, and its effectiveness in information transmission in emergency situations is limited.

[0003] In conventional traffic environments, there is a lack of a public way for car owners to communicate with each other. When car owners drive alone, such as taxi drivers, bus drivers, truck drivers, etc., they need to communicate with others in a long and boring driving environment. Therefore, with the development of the Internet of Vehicles, V2X needs to provide a way for car owners to communicate directly with each other.

[0004] Similarly, in complex traffic environments, RSU (Road Side Unit), integrated radar and vision devices, and MEC (Multi-access Edge Computing) are basically distributed at intersections or roadsides to realize traffic event analysis. There may be blind spots where cameras cannot detect, so it is impossible to make real-time event judgments. At this time, only V2V exists. On roads where RSU, MEC, and integrated radar and vision devices are not installed, a better way is needed to solve related problems. Car owners may not be able to intuitively feel the effective messages prompted, which affects the car owner's judgment of the road status, so a better way is needed to solve related problems.

[0005] Especially in urban environments with heavy traffic and changing road conditions, V2X needs to process and transmit a large amount of data in a very short time. Although car owners can understand the traffic incident from the visualization of data, they cannot intuitively and in real time understand the progress of the incident resolution, so car owners cannot respond promptly to the corresponding incident. This limitation may cause car owners to miss key effective information and affect road traffic efficiency. Similarly, in traffic incidents, the car owners involved also need an emergency help method so that the surrounding car owners can understand the incident and facilitate rescue. Therefore, in special circumstances, how to convey road traffic information to other car owners in real time and accurately is still a challenge. Summary of the invention

[0006] The technical problem to be solved by the present invention is: in view of the technical problems existing in the prior art, the present invention provides a method for voice broadcasting messages based on V2X which has a simple principle, easy operation and a wide range of applications.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions: A method for broadcasting a voice message based on V2X, wherein the message includes a BVM message, and the process of generating and broadcasting the message includes: Step S1: voice input; collecting voice information in the vehicle, the voice information is data encoded and data encapsulated; Step S2: Transmitting the compressed and encapsulated data via V2X in a broadcasting manner; Step S3: Voice output: The receiving end receives the data transmitted via V2X, and completes the voice output after data decoding and data filtering. As a further improvement of the present invention: in the step S1, the voice collection is to capture the voice information using the sound collection device built into the vehicle, and pre-process it to ensure the quality of the voice signal.

[0008] As a further improvement of the present invention: in the step S1, when performing data encoding, Opus or SILK encoding technology is selected to compress the voice signal data to meet the data transmission requirements of the wireless network.

[0009] As a further improvement of the present invention: in the step S1, when performing data encapsulation, the encoded voice data is encapsulated into a BVM message, and necessary data is attached, and the necessary data includes one or more of location, timestamp, message type and priority.

[0010] As a further improvement of the present invention: in the step S3, when the receiving end performs data reception and decoding, the OBU is used to automatically receive the broadcasted BVM message, and the decoder is used to restore the original voice signal.

[0011] As a further improvement of the present invention: the step S3 also includes an intelligent filtering and priority management process, that is, intelligently sorting and filtering the received BVM messages according to the urgency and relevance of the messages.

[0012] As a further improvement of the present invention: in the step S3, when the voice is played, the voice message is played through the vehicle audio system to ensure that the vehicle owner can clearly receive the road condition information.

[0013] As a further improvement of the present invention: the step S3 also includes interactive operations of the user interface, that is: supporting the car owner to send and receive BVM messages through the user interface and displaying the message priority.

[0014] As a further improvement of the present invention: the step S2 also includes a privacy protection strategy, that is, an asymmetric encryption algorithm is adopted during the message transmission process, and a broadcast receiving distance is set to protect the privacy of the car owner.

[0015] As a further improvement of the present invention: the BVM message includes basic voice information and additional information, and the additional information includes one or more of message number, vehicle temporary number, time, longitude, latitude, altitude, message broadcast range, and event direction.

[0016] Compared with the prior art, the advantages of the present invention are: The method of voice broadcasting messages based on V2X of the present invention has a simple principle, is easy to operate, and has a wide range of applications. It can greatly expand the information interaction capabilities between people and vehicles, and between people during driving. That is to say, the present invention can provide a communication channel between vehicles, which can be used to call for help in an emergency or to increase driving pleasure during long and boring driving. At the same time, the present invention can also make up for the car owner's perception of road conditions when the roadside construction is not perfect and the road camera's blind spot is in sight. By having the car owner reflect the road conditions in real time, the car owner's blind spot can be made up, which plays a certain role in the car owner's decision-making, and then improves the handling of traffic incidents and road congestion to a certain extent. The present invention further provides a solution to the problem of insufficient roadside equipment during the development of the Internet of Vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the process of the present invention.

[0018] Figure 2 It is a detailed flow chart of the present invention in a specific embodiment.

[0019] Figure 3 It is a schematic diagram of the BVM message structure parameter definition in a specific embodiment of the present invention.

[0020] Figure 4 It is a schematic diagram of a road reminder BVM message in a specific embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of BVM messages exchanged between vehicles in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In the description of this application, some terms are explained as follows for ease of understanding: V2X: V2X (Vehicle to X) is a communication technology that allows vehicles to exchange information with various external entities through built-in communication systems. The "X" here represents the objects that the vehicle can communicate with, including but not limited to other vehicles (V2V, Vehicle-to-Vehicle), pedestrians (V2P, Vehicle-to-Pedestrian), road infrastructure (V2I, Vehicle-to-Infrastructure), networks (V2N, Vehicle-to-Network) and cloud services (V2C, Vehicle-to-Cloud).

[0024] RSU: RSU (Road Side Unit) is a key component of the V2X technology solution. As a road information infrastructure, it is connected to vehicles through wireless communication technology and plays a vital role. RSU can send real-time road information to vehicles, such as traffic congestion, accident warnings, etc., and can also receive data sent by vehicles, such as vehicle speed, acceleration, etc., to achieve efficient information exchange between vehicles and road infrastructure.

[0025] OBU: OBU (On-Board Unit) is a key component in the vehicle network communication system, used to achieve communication between vehicles (V2V, Vehicle-to-Vehicle), vehicles and infrastructure (V2I, Vehicle-to-Infrastructure), vehicles and pedestrians (V2P, Vehicle-to-Pedestrian) and vehicles and networks (V2N, Vehicle-to-Network). OBU is the basic equipment for vehicle access to vehicle-to-everything (V2X, Vehicle-to-Everything) technology.

[0026] MEC: MEC (Multi-access Edge Computing) is a network solution that provides the services and computing functions required by users at the edge of the network.

[0027] BVM: BVM (Base Voice Message) basic voice broadcast message is a new type of message set added to the V2X message set in the present invention.

[0028] BSM: BSM (Basic Safety Message) is a type of V2X message set, mainly used for vehicle safety applications. BSM allows vehicles to periodically broadcast their status information, including location, speed, driving direction, acceleration, etc., so that other vehicles or infrastructure can receive and use this information to improve road safety.

[0029] RSI: RSI (Road Side Information) is a type of V2X message set, which refers to static or dynamic roadside information sent by the roadside unit RSU to the vehicle. This information may include traffic signals, road sign information, road condition warnings, emergency vehicle information, etc., aiming to improve road safety and traffic efficiency.

[0030] like Figure 1 and Figure 2 As shown, the present invention provides a method for voice broadcasting message based on V2X, wherein the message includes a BVM message (Base Voice Message basic voice broadcast message), and the process of generating and broadcasting the message includes: Step S1: voice input; collecting voice information in the vehicle, the voice information is data encoded and data encapsulated; Step S2: Transmitting the compressed and encapsulated data via V2X in a broadcasting manner; Step S3: Voice output: The receiving end receives the data transmitted via V2X, and completes the voice output after data decoding and data filtering.

[0031] In a specific application example, in step S1, voice collection can utilize a high-quality microphone built into the vehicle to capture clear voice information, and use advanced noise suppression and echo cancellation algorithms for preprocessing.

[0032] In a specific application example, in step S1, when data encoding is performed, a high-efficiency encoding technology such as Opus or SILK can be selected according to actual application needs to compress the voice signal data to meet the data transmission requirements of the wireless network.

[0033] In a specific application example, in step S1, when performing data encapsulation, the encoded voice data can be encapsulated into a BVM message, and necessary data such as location, timestamp, message type and priority can be attached.

[0034] In a specific application example, in step S2, during data transmission, a V2X communication network, such as C-V2X, is used to achieve message broadcasting and interoperability in accordance with standards such as IEEE 1609.

[0035] In a specific application example, in step S3, when receiving and decoding data at the receiving end, the OBU (On-Board Unit) can be used to automatically receive the broadcasted BVM message, and the corresponding decoder can be used to restore the original voice signal.

[0036] In a specific application example, step S3 may further include an intelligent filtering and priority management process, that is, intelligently sorting and filtering received BVM messages according to the urgency and relevance of the messages.

[0037] In a specific application example, in step S3, when performing voice playback, you can choose to play the voice message through the vehicle audio system to ensure that the owner can clearly receive the road condition information.

[0038] In a specific application example, step S3 may further include interactive operations of the user interface, that is, designing an easy-to-operate user interface to support the car owner to send and receive BVM messages and display message priorities.

[0039] In a specific application example, step S2 may further include a privacy protection strategy, that is, adopting an asymmetric encryption algorithm during message transmission and setting a broadcast receiving distance to protect the privacy of the car owner. Through these comprehensive technical means, BVM can efficiently transmit traffic information through V2X, solving the problem of obtaining accurate traffic information in real time under some special circumstances.

[0040] like Figure 3 As shown, the BVM basic voice broadcast message set structure parameter definition of the present invention in a specific application example.

[0041] The BVM basic voice broadcast message set encoding protocol is defined as shown in Table 1 below.

[0042] Table 1 BVM message set encoding protocol definition

[0043] The voice broadcast message BVM is a message sent outward by the vehicle. The vehicle broadcasts BVM through V2X to inform surrounding vehicles of its real-time status and voice messages.

[0044] In the specific application process, BVM has some additional information in addition to basic voice information, such as the message number, vehicle temporary number, time, longitude, latitude, altitude, message broadcast range (radius), event direction, etc. in the BVM voice broadcast message. The most important things in the voice broadcast message are time, voice message, and vehicle location. The location and real-time situation of the main vehicle that broadcasts can be directly located through time, location information, and voice information.

[0045] Under normal traffic conditions, when the owner sends BVM, the time location message and other voice messages will be broadcasted through V2X. Other car owners can obtain the location of the owner's car, the time of voice transmission, and voice messages through BVM, which can be used for communication and entertainment, increasing driving pleasure. It can also be used as an emergency call for help when the owner's car encounters a traffic incident, making it easier for other car owners to provide assistance.

[0046] In the event of a traffic incident, the time and location message is automatically generated along with the voice message broadcast, so that other vehicles can quickly locate the traffic incident. According to the description of the incident, the corresponding traffic strategy can be adopted to improve the road congestion. At the same time, according to the description of the event, the car networking car can understand the road conditions at that time through analysis. The traffic police and other relevant agencies can also obtain the V2X message set from the cloud control and take corresponding measures to improve the overall response efficiency of traffic incidents, improve public transportation safety, and improve road traffic efficiency.

[0047] To sum up, in the above technical solution of the present invention, a V2X communication method is adopted, and a communication channel between vehicles is added in the transmitted message, which has the following advantages: when encountering dangerous road conditions, a way is added for the main vehicle to notify the slave vehicle to avoid driving risks; driving pleasure is increased; the driver can call for help in an emergency.

[0048] Specifically, by adopting the above-mentioned technical solution of the present invention, the car owner can broadcast the road conditions by issuing V2X voice messages; meet the communication needs through the car owner's voice communication and entertainment; and call for emergency help in special circumstances. By sharing traffic event information and potential situations that need attention, the car owner can intuitively reflect the road traffic situation and the progress of the traffic event. In the event of a traffic event, the voice message broadcast by BVM can be obtained in the area where the traffic event occurred, and the actual situation of the traffic event can be understood through the description of other car owners. Under normal circumstances, car owners can communicate with each other through voice broadcasts to alleviate the boredom of long-term driving and provide a form of entertainment. In emergency times, vehicles involved in traffic events can also send voice emergency calls through BVM. This method supplements traditional V2X messages and adds a communication channel between vehicles.

[0049] In a specific application example, it is the transmission process of the message data including the BVM message. At the sending end, the voice data is input through the APP or other on-board devices, and the broadcast range can be set. Then it is processed inside the OBU and the voice data is encoded. According to the IEEE 1588 standard PTP protocol (Precision Time Protocol), the location and timestamp data in the GNSS data are synchronized. At the same time, the location, timestamp and other data in the GNSS data in the OBU of the vehicle are obtained and encapsulated into the BVM message together with the voice data, and broadcast through the V2X message.

[0050] The receiving end receives the V2X message and decodes it. Then, the vehicle's GNSS data, such as location and timestamp, are obtained through the vehicle's OBU. Then, the location and other data in the BVM are parsed to determine whether the distance is greater than the broadcast distance in the BVM. If it is greater than the broadcast distance, the BVM message is not received. If it is less than or equal to the broadcast distance, the message data is intelligently filtered to shield noise or some unfriendly information. Then, the filtered voice data is output through the vehicle-mounted device.

[0051] In the specific application process of the present invention, the BVM message can solve the problem of obtaining accurate road condition information in real time under some special circumstances. Assume the following situation. Figure 4 As shown in the figure, when the traffic incident (between car A and car B) occurs outside the range of the intersection camera, the traffic incident cannot be identified by the integrated radar and MEC at the intersection. For vehicle C waiting to pass, vehicle B in front stops and blocks the view, so vehicle C waiting to pass cannot decide whether to wait or change lanes. If it is during peak traffic hours, this situation may cause traffic jams.

[0052] This problem can be solved by adding a BVM message to the V2X message. Figure 3 As shown, a vehicle D passes by the incident point in the lane next to the traffic incident (lane 3 in the figure) (lane 2 in the figure) to understand the situation or progress of the incident. At this time, vehicle D can send a V2X BVM message to describe the occurrence of the traffic incident. The BVM broadcast range can be determined by the urgency or importance of the incident. Within the BVM broadcast range, other vehicles can receive the BVM message through V2X. After decoding and filtering the BVM, the on-board equipment will broadcast the decoded and filtered message through BVM for voice reminder, and the on-board display screen will remind traffic incidents and serious situations. Other car owners can intuitively understand the real-time situation of traffic incidents.

[0053] Furthermore, BVM messages can also be exchanged between car owners through V2X message broadcasting, such as Figure 5The communication between car A and car B is shown. It can meet the entertainment needs of drivers who drive for a long time. In special cases, when a car has a traffic incident and needs help, emergency help can be sought through this method. The owner who receives the message can understand the situation of the owner of the traffic incident, so as to provide more convenient and scientific assistance.

[0054] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A method for voice broadcasting message based on V2X, characterized in that: The message includes a BVM message, and the process of generating and broadcasting the message includes: Step S1: voice input; collecting voice information in the vehicle, the voice information is data encoded and data encapsulated; Step S2: Transmitting the compressed and encapsulated data via V2X in a broadcasting manner; Step S3: Voice output: The receiving end receives the data transmitted via V2X, and completes the voice output after data decoding and data filtering.

2. The method for broadcasting a voice message based on V2X according to claim 1, characterized in that: In step S1, voice collection is to capture voice information using a built-in sound collection device in the vehicle and perform preprocessing to ensure the quality of the voice signal.

3. The method for broadcasting a voice message based on V2X according to claim 1, characterized in that: In the step S1, when performing data encoding, Opus or SILK encoding technology is selected to compress the voice signal data to meet the data transmission requirements of the wireless network.

4. The method for broadcasting a voice message based on V2X according to claim 1, characterized in that: In the step S1, when performing data encapsulation, the encoded voice data is encapsulated into a BVM message, and necessary data is attached, wherein the necessary data includes one or more of a location, a timestamp, a message type, and a priority.

5. The method for broadcasting a voice message based on V2X according to any one of claims 1 to 4, characterized in that: In step S3, when the receiving end performs data reception and decoding, the OBU is used to automatically receive the broadcasted BVM message, and the decoder is used to restore the original voice signal.

6. The method for broadcasting a voice message based on V2X according to any one of claims 1 to 4, characterized in that: The step S3 also includes an intelligent filtering and priority management process, that is, intelligently sorting and filtering the received BVM messages according to the urgency and relevance of the messages.

7. The method for broadcasting a voice message based on V2X according to any one of claims 1 to 4, characterized in that: In step S3, when voice playback is performed, the voice message is played through the vehicle audio system to ensure that the vehicle owner can clearly receive the road condition information.

8. The method for broadcasting a voice message based on V2X according to any one of claims 1 to 4, characterized in that: The step S3 also includes interactive operations of the user interface, namely: supporting the vehicle owner to send and receive BVM messages through the user interface and displaying the message priority.

9. The method for broadcasting a voice message based on V2X according to any one of claims 1 to 4, characterized in that: The step S2 also includes a privacy protection strategy, that is, an asymmetric encryption algorithm is adopted during the message transmission process, and a broadcast receiving distance is set to protect the privacy of the car owner.

10. The method for broadcasting a voice message based on V2X according to any one of claims 1 to 4, characterized in that: The BVM message includes basic voice information and additional information, and the additional information includes one or more of a message number, a temporary vehicle number, time, longitude, latitude, altitude, message broadcast range, and event location.

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