Radio access technology switching method and system, and storage medium and electronic device

Abstract

Disclosed are an radio access technology switching method and system, and a storage medium and an electronic device. The radio access technology switching method comprises: acquiring vehicle basic safety information, a wireless air interface bit error rate and a wireless channel busy ratio in a current statistical period; calculating the packet error rate of the vehicle basic safety information; determining respective weight coefficients of the packet error rate, the wireless air interface bit error rate and the wireless channel busy ratio; calculating a switching state value on the basis of the packet error rate, the wireless air interface bit error rate, the wireless channel busy ratio and the weight coefficients; and switching radio access technology if the switching state value satisfies a switching threshold value.

Description

Wireless access technology switching method, system, storage medium and electronic device

[0001] Citation of Related Applications

[0002] This disclosure claims all rights and interests in the Chinese invention patent application with application number 202311594114.9 filed with the State Intellectual Property Office of the People's Republic of China on November 24, 2023, and entitled "Switching method, system, storage medium and electronic device for wireless access technology", and incorporates the entire contents thereof into this disclosure by reference.

[0003] field

[0004] The present disclosure generally relates to the field of vehicle-mounted communication technology, and more particularly to a switching method, system, storage medium, and electronic device for wireless access technology.

[0005] background

[0006] V2X technology stands for Vehicle to Everything, which refers to the exchange of information between vehicles and the outside world. It is a technology that allows vehicles to communicate with each other, other road users and infrastructure to improve road safety and mobility.

[0007] Current V2X technologies primarily encompass two types: DSRC and C-V2X. DSRC is dedicated short-range communication, a Wi-Fi-based standard specifically designed for vehicle use. C-V2X, on the other hand, is derived from the cellular standard "Cellular Vehicle-to-Everything," and offers a coverage range of several kilometers. However, current onboard units (ONUs) operate independently of the two V2X radio access technologies, preventing them from working together and hindering autonomous driving.

[0008] Overview

[0009] In one aspect, the present disclosure provides a method for switching a wireless access technology, comprising:

[0010] Obtain basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate within the current statistical period;

[0011] Calculating a packet error rate of the basic safety information of the vehicle;

[0012] Determining respective weight coefficients of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate;

[0013] Calculating a handover state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate, and each of the weight coefficients;

[0014] If the switching state value meets the switching threshold, the radio access technology is switched.

[0015] In some embodiments, calculating the packet error rate of the basic vehicle safety information includes:

[0016] The packet error rate is calculated based on the number of non-continuous messages of the vehicle's basic safety information within a set time period.

[0017] In certain embodiments, after calculating the packet error rate of the basic vehicle safety information, the method for switching wireless access technology further includes:

[0018] The packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate are smoothed.

[0019] In some embodiments, the smoothing of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate includes:

[0020] Smoothing the packet error rate of the current statistical period according to the average packet error rate of the previous statistical period;

[0021] Smoothing the wireless air interface bit error rate of the current statistical period according to the average wireless air interface bit error rate of the previous statistical period;

[0022] The wireless channel busy rate of the current statistical period is smoothed according to the average wireless channel busy rate of the previous statistical period.

[0023] In some embodiments, the smoothing of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate includes:

[0024] The extreme values ​​of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate are removed respectively, and the average of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate is taken.

[0025] In some embodiments, the handover state value is calculated based on the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate, and each of the weight coefficients:

[0026] Assume that the weight coefficients corresponding to the packet error rate A, the wireless air interface bit error rate B, and the wireless channel busy rate C are a, b, and c, respectively, and a+b+c=1, c>a>b;

[0027] Then the switching state value is A×a+B×b+C×c.

[0028] In some embodiments, switching the radio access technology includes:

[0029] The access technology firmware to be switched and a switching instruction are sent to the wireless access communication module; the switching instruction is used to instruct the wireless access communication module to switch the wireless access technology.

[0030] In another aspect, the present disclosure relates to a handover system for a wireless access technology, comprising:

[0031] An information acquisition module is configured to obtain basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate within a current statistical period;

[0032] a packet error rate calculation module, configured to calculate the packet error rate of the basic safety information of the vehicle;

[0033] a coefficient determination module, configured to determine respective weight coefficients of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate;

[0034] The switching control module is configured to calculate a switching state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate and each weight coefficient; if the switching state value meets the switching threshold, switch the wireless access technology.

[0035] In certain embodiments, the packet error rate calculation module is a module configured to calculate the packet error rate according to the non-consecutive number of the vehicle basic safety information within a set time period.

[0036] In some embodiments, the handover system for wireless access technology further comprises:

[0037] The data processing module is configured to perform smoothing processing on the packet error rate, the wireless air interface bit error rate and the wireless channel busy rate.

[0038] In certain embodiments, the data processing module comprises:

[0039] The first processing unit is configured to smooth the packet error rate of the current statistical period based on the average packet error rate of the previous statistical period; smooth the wireless air interface bit error rate of the current statistical period based on the average wireless air interface bit error rate of the previous statistical period; and smooth the wireless channel busy rate of the current statistical period based on the average wireless channel busy rate of the previous statistical period.

[0040] In certain embodiments, the data processing module comprises:

[0041] The second processing unit removes extreme values ​​of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate, and takes the average of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate.

[0042] In some embodiments, the handover control module includes:

[0043] The state value calculation unit is configured to set the weight coefficients corresponding to the packet error rate A, the wireless air interface bit error rate B and the wireless channel busy rate C to a, b and c respectively, and a+b+c=1, c>a>b; then the switching state value is A×a+B×b+C×c.

[0044] In some embodiments, the handover control module includes:

[0045] The switching unit is configured to send the access technology firmware to be switched and a switching instruction to the wireless access communication module; the switching instruction is used to instruct the wireless access communication module to switch the wireless access technology.

[0046] On the other hand, the present disclosure relates to a computer-readable storage medium having a computer program stored thereon, which implements the handover method of the wireless access technology described in the present disclosure when the computer program is executed by a processor.

[0047] On the other hand, the present disclosure relates to an electronic device, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the switching method of the wireless access technology described in the present disclosure when calling the computer program in the memory.

[0048] In certain implementation schemes, by obtaining the basic safety information of the vehicle, the wireless air interface bit error rate, and the wireless channel busy rate within the current statistical period, and combining the respective weight coefficients, the switching state value is calculated so as to realize automatic switching of the wireless access technology when the network status is poor, so that the on-board unit can adaptively adjust the access method according to the real-time application scenario to provide high-performance wireless access technology, ensuring that the process of information exchange between the vehicle and the outside world is responded to and processed in a timely manner.

[0049] BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are merely embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0051] FIG1 is a flow chart of a method for switching a wireless access technology provided by an embodiment of the present disclosure;

[0052] FIG2 is a flow chart of another wireless access technology switching method provided by an embodiment of the present disclosure;

[0053] FIG3 is a schematic diagram of the structure of a switching system for a wireless access technology provided by an embodiment of the present disclosure; and

[0054] FIG4 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.

[0055] Details

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0057] Please refer to FIG1 , which is a flowchart of a method for switching a wireless access technology provided by an embodiment of the present disclosure. The method includes:

[0058] S101: Obtain basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate within the current statistical period;

[0059] S102: Calculating the packet error rate of the basic safety information of the vehicle;

[0060] S103: Determine respective weight coefficients of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate;

[0061] S104: Calculating a handover state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate, and each of the weight coefficients;

[0062] S105: If the switching state value meets the switching threshold, switch the radio access technology.

[0063] In some implementation schemes, step S101 aims to obtain three pieces of information, namely, basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate. In the application scenario of wireless access technology, it mainly includes an on-board unit (OBU) and a roadside unit (RSU). The on-board unit is a software and hardware unit installed on the vehicle that can realize V2X communication and support V2X applications. The roadside unit is a software and hardware unit installed on the roadside that can realize V2X communication and support V2X applications. During the application of V2X technology, the on-board unit communicates with other devices, including but not limited to communication between on-board units (V2V), communication between on-board units and roadside units (V2I), communication between on-board units and pedestrian devices (V2P), and communication between on-board units and networks (V2N). In the V2V scenario, the on-board unit will periodically send vehicle basic safety messages (BSM, Basic Safety Message) to the on-board units of surrounding vehicles to support related V2V applications.

[0064] To facilitate statistics, a statistical cycle can be set in advance. The specific duration of the statistical cycle can be determined by those skilled in the art and is not specifically set here. It can serve as the execution cycle of the embodiments of the present disclosure. That is, the wireless access technology switching method provided by the embodiments of the present disclosure can be executed during each statistical cycle.

[0065] The wireless channel busy rate is used to provide feedback on channel utilization. High channel utilization often leads to slow network speeds and lags. The wireless air interface bit error rate (BLER) indicates the percentage of erroneous blocks among all transmitted blocks. A higher BLER value indicates a poorer signal environment. Both the wireless air interface bit error rate and the wireless channel busy rate are calculated and determined by the underlying communications chip.

[0066] In certain embodiments, step S102 is intended to calculate a packet error rate, which is used to provide feedback on the ratio of the actual amount of basic vehicle safety information received to the theoretical amount. In certain embodiments, the packet error rate can be calculated based on the number of non-continuous pieces of basic vehicle safety information received within a set time period. Since basic vehicle safety information is typically transmitted at a fixed frequency, the amount of basic vehicle safety information received during the current statistical period can be obtained, and the theoretically obtainable amount of basic vehicle safety information can be calculated at the fixed frequency to determine the packet error rate of the basic vehicle safety information.

[0067] In certain embodiments, step S103 is intended to determine weight coefficients for the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate. It should be noted that while the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate can all provide feedback on network quality, their importance varies. Generally, the wireless channel busy rate is more important, followed by the packet error rate, with the wireless air interface bit error rate being the least important of the three. The weight coefficients for the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate are not limited herein and can be set by those skilled in the art.

[0068] In some embodiments, the weight coefficients corresponding to the packet error rate A, the wireless air interface bit error rate B, and the wireless channel busy rate C are respectively a, b, and c, and a+b+c=1, c>a>b.

[0069] In some embodiments, steps S104 and S105 are intended to calculate a handover status value according to the weight coefficient determined above, and the handover status value is used to feedback whether to perform handover of the radio access technology based on the handover threshold.

[0070] If the weight coefficients corresponding to the packet error rate A, the wireless air interface bit error rate B and the wireless channel busy rate C are a, b and c respectively, and a+b+c=1, c>a>b, then the switching state value is A×a+B×b+C×c.

[0071] It should be noted that the weight coefficient can be set to 0. For example, if a channel busy rate threshold is set in advance for the wireless channel busy rate, then as long as the wireless channel busy rate meets the channel busy rate threshold, it can be considered that the switching threshold is met.

[0072] Likewise, the specific value of the switching threshold is not limited here. In the art, the corresponding switching state value can be set according to the weight coefficients of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate.

[0073] When the switching status value meets the switching threshold, the wireless access technology can be switched. Specifically, the access technology firmware to be switched and a switching instruction can be sent to the wireless access communication module on the vehicle. The switching instruction is used to instruct the wireless access communication module to switch the wireless access technology. After the switch, a reset will take effect on the switched wireless access technology.

[0074] In certain implementation schemes, by obtaining the basic safety information of the vehicle, the wireless air interface bit error rate, and the wireless channel busy rate within the current statistical period, and combining the respective weight coefficients, the switching state value is calculated so as to realize automatic switching of the wireless access technology when the network status is poor, so that the on-board unit can adaptively adjust the access method according to the real-time application scenario to provide high-performance wireless access technology, ensuring that the process of information exchange between the vehicle and the outside world is responded to and processed in a timely manner.

[0075] In certain embodiments, after calculating the packet error rate of the vehicle basic safety information, the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate may be smoothed.

[0076] The corresponding complete implementation process is shown in FIG2 , which is a flow chart of a switching method for another wireless access technology provided by an embodiment of the present disclosure:

[0077] S201: Obtain basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate within the current statistical period;

[0078] S202: Calculating the packet error rate of the basic safety information of the vehicle;

[0079] S203: Smoothing the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate;

[0080] S204: Determine respective weight coefficients of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate;

[0081] S205: Calculating a handover state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate, and each of the weight coefficients;

[0082] S206: If the switching state value meets the switching threshold, switch the radio access technology.

[0083] By smoothing the packet error rate, wireless air interface bit error rate, and wireless channel busy rate, the error statistics of the packet error rate, wireless air interface bit error rate, and wireless channel busy rate can be reduced, thereby reducing errors. There is no limitation on how to perform the smoothing process. This embodiment provides two processing methods:

[0084] In one smoothing method, the data of the current statistical period may be smoothed based on the data of the previous statistical period, which may specifically include:

[0085] Smoothing the packet error rate of the current statistical period according to the average packet error rate of the previous statistical period;

[0086] Smoothing the wireless air interface bit error rate of the current statistical period according to the average wireless air interface bit error rate of the previous statistical period;

[0087] The wireless channel busy rate of the current statistical period is smoothed according to the average wireless channel busy rate of the previous statistical period.

[0088] In another smoothing method, smoothing can be performed by eliminating extreme values. Specifically, the extreme values ​​of the packet error rate, wireless air interface bit error rate, and wireless channel busy rate can be removed, and the average of the packet error rate, wireless air interface bit error rate, and wireless channel busy rate can be calculated. It should be noted that the packet error rate, wireless air interface bit error rate, and wireless channel busy rate can be divided into several small periods within each statistical period and independently counted. After eliminating the extreme values ​​of individual small periods, the average corresponding to the entire statistical period is calculated.

[0089] Of course, those skilled in the art may also adopt other smoothing methods, such as applying a smoothing function, etc., which are not limited to the examples given here.

[0090] The following describes the switching method of the wireless access technology provided by the present disclosure using the application process of the present disclosure:

[0091] In some embodiments, taking the on-board unit as an example, three systems may be set up in the on-board unit, namely, an adaptive processing system, an information processing system, and a wireless access communication system.

[0092] Step 1: Configure the timer duration T1 as the statistical period, the vehicle basic safety information packet error rate statistical period duration T2, the packet error rate threshold H1, the wireless air interface bit error rate threshold H2, the wireless channel busy rate threshold H3, etc.

[0093] Step 2: The wireless access communication system reports the received vehicle basic safety information message, wireless air interface bit error rate, and wireless channel busy rate to the information processing system.

[0094] In the third step, the information processing system calculates the packet error rate based on the vehicle basic safety information messages received from other vehicles, and calculates the packet error rate by counting the number of non-consecutive MsgCount messages of vehicle basic safety information within the time length T2; and smoothes the packet error rate, wireless air interface bit error rate, and wireless channel busy rate.

[0095] Step 4: The adaptive processing system obtains the packet error rate, wireless air interface bit error rate, and wireless channel busy rate from the information processing system at a periodic T1.

[0096] In step 5, the adaptive processing system determines whether to switch the wireless access technology based on the algorithm. For example, if the packet error rate is greater than H1, the bit error rate is greater than H2, and the channel busy rate is greater than H3, the calculated switching status value must be greater than the switching threshold. In this case, the system jumps to step 6 and needs to switch the wireless access technology (DSRC or C-V2X). If the calculated switching status value is less than the switching threshold, the system jumps to step 4 and waits for the next statistical cycle. There is no need to switch the current wireless access technology.

[0097] Step 6: The adaptive processing system sends the new access technology firmware to the wireless access communication system and instructs the wireless access communication system to switch the access technology.

[0098] Step 7: The wireless access communication system switches to a new wireless access technology and resets it to take effect.

[0099] The following introduces a switching system for a wireless access technology provided by an embodiment of the present disclosure. The switching system for a wireless access technology described below and the switching method for a wireless access technology described above may refer to each other.

[0100] Refer to Figure 3, which is a schematic diagram of the switching system structure of a wireless access technology provided by an embodiment of the present disclosure. The present disclosure also provides a switching system for wireless access technology, which includes:

[0101] An information acquisition module is configured to obtain basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate within a current statistical period;

[0102] a packet error rate calculation module, configured to calculate the packet error rate of the basic safety information of the vehicle;

[0103] a coefficient determination module, configured to determine respective weight coefficients of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate;

[0104] The switching control module is configured to calculate a switching state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate and each weight coefficient; if the switching state value meets the switching threshold, switch the wireless access technology.

[0105] In certain embodiments, the packet error rate calculation module is a module configured to calculate the packet error rate according to the non-consecutive number of the vehicle basic safety information within a set time period.

[0106] In some embodiments, the handover system for wireless access technology further comprises:

[0107] The data processing module is configured to perform smoothing processing on the packet error rate, the wireless air interface bit error rate and the wireless channel busy rate.

[0108] In certain embodiments, the data processing module comprises:

[0109] The first processing unit is configured to smooth the packet error rate of the current statistical period based on the average packet error rate of the previous statistical period; smooth the wireless air interface bit error rate of the current statistical period based on the average wireless air interface bit error rate of the previous statistical period; and smooth the wireless channel busy rate of the current statistical period based on the average wireless channel busy rate of the previous statistical period.

[0110] In certain embodiments, the data processing module comprises:

[0111] The second processing unit removes extreme values ​​of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate, and takes the average of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate.

[0112] In some embodiments, the handover control module includes:

[0113] The state value calculation unit is configured to set the weight coefficients corresponding to the packet error rate A, the wireless air interface bit error rate B and the wireless channel busy rate C to a, b and c respectively, and a+b+c=1, c>a>b; then the switching state value is A×a+B×b+C×c.

[0114] In some embodiments, the handover control module includes:

[0115] The switching unit is configured to send the access technology firmware to be switched and a switching instruction to the wireless access communication module; the switching instruction is used to instruct the wireless access communication module to switch the wireless access technology.

[0116] The present disclosure also provides a computer-readable storage medium having a computer program stored thereon. When executed, the computer program can implement the wireless access technology handover method described in the present disclosure. In certain embodiments, the storage medium can include various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0117] The present disclosure also provides an electronic device that may include a memory and a processor. The memory stores a computer program, and when the processor invokes the computer program in the memory, it can implement the wireless access technology switching method described in the present disclosure. Of course, the electronic device may also include various network interfaces, a power supply, and other components.

[0118] The present disclosure further provides an electronic device. Referring to FIG. 4 , which is a structural diagram of an electronic device provided by an embodiment of the present disclosure, the electronic device may include a processor 1410 and a memory 1420 , as shown in FIG. 4 .

[0119] In some embodiments, the processor 1410 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 1410 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), or a PLA (Programmable Logic Array). The processor 1410 may also include a main processor and a coprocessor. The main processor is a processor configured to process data in an awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor configured to process data in a standby state. In some embodiments, the processor 1410 may be integrated with a GPU (Graphics Processing Unit), which is configured to be responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 1410 may also include an AI (Artificial Intelligence) processor configured to process computing operations related to machine learning.

[0120] In some embodiments, the memory 1420 may include one or more computer-readable storage media, which may be non-transitory. The memory 1420 may also include high-speed random access memory, and non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 1420 is at least configured to store the following computer program 1421, wherein, after the computer program is loaded and executed by the processor 1410, it can implement the relevant steps in the method performed by the electronic device side described in this disclosure. In some embodiments, the resources stored in the memory 1420 may also include an operating system 1422 and data 1423, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 1422 may include Windows, Linux, Android, etc.

[0121] In some embodiments, the electronic device may further include a display screen 1430 , an input / output interface 1440 , a communication interface 1450 , a sensor 1460 , a power supply 1470 , and a communication bus 1480 .

[0122] Of course, the structure of the electronic device shown in FIG4 does not constitute a limitation on the electronic device in the embodiment of the present disclosure. In actual applications, the electronic device may include more or fewer components than those shown in FIG4, or combine certain components.

[0123] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the systems provided in the embodiments, since they correspond to the methods provided in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0124] This document uses specific examples to illustrate the principles and implementation methods of the present disclosure. The description of the above examples is only intended to help understand the methods and core concepts of the present disclosure. It should be noted that those skilled in the art can make various improvements and modifications to the present disclosure without departing from the principles of the present disclosure, and such improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

[0125] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

Claims

1. A method for switching a wireless access technology, comprising: Obtain basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate within the current statistical period; Calculating the packet error rate of the basic safety information of the vehicle; Determine respective weight coefficients of the packet error rate, the wireless air interface bit error rate, and the wireless channel busy rate; Calculate the switching state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate and each of the weight coefficients; If the switching state value meets the switching threshold, the radio access technology is switched.

2. The switching method according to claim 1, wherein calculating the packet error rate of the basic vehicle safety information comprises: The packet error rate is calculated based on the non-continuous number of basic safety information of the vehicle within a set time period.

3. The switching method according to claim 1 or 2, wherein after calculating the packet error rate of the basic vehicle safety information, the switching method further comprises: The packet error rate, the wireless air interface bit error rate and the wireless channel busy rate are smoothed.

4. The switching method according to claim 3, wherein the smoothing of the packet error rate, the wireless air interface bit error rate and the wireless channel busy rate comprises: Smoothing the packet error rate of the current statistical period according to the average packet error rate of the previous statistical period; Smoothing the wireless air interface bit error rate of the current statistical period according to the average wireless air interface bit error rate of the previous statistical period; as well as The wireless channel busy rate of the current statistical period is smoothed according to the average wireless channel busy rate of the previous statistical period.

5. The switching method according to claim 3, wherein the smoothing of the packet error rate, the wireless air interface bit error rate and the wireless channel busy rate comprises: The extreme values ​​of the packet error rate, the wireless air interface bit error rate and the wireless channel busy rate are removed respectively, and the average values ​​of the packet error rate, the wireless air interface bit error rate and the wireless channel busy rate are taken.

6. The switching method according to any one of claims 1 to 5, wherein calculating the switching state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate and each of the weight coefficients comprises: Assume that the weight coefficients corresponding to the packet error rate A, the wireless air interface bit error rate B and the wireless channel busy rate C are a, b and c respectively, and a+b+c=1, c>a>b; Then the switching state value is A×a+B×b+C×c.

7. The switching method according to any one of claims 1 to 6, wherein the switching of the radio access technology comprises: Sending the access technology firmware to be switched and the switching instruction to the wireless access communication module; The switching instruction is used to instruct the wireless access communication module to switch the wireless access technology.

8. A switching system for a wireless access technology, comprising: An information acquisition module is configured to acquire basic vehicle safety information, wireless air interface bit error rate, and wireless channel busy rate within a current statistical period; A packet error rate calculation module, configured to calculate the packet error rate of the basic safety information of the vehicle; A coefficient determination module, configured to determine respective weight coefficients of the packet error rate, the wireless air interface bit error rate and the wireless channel busy rate; The switching control module is configured to calculate a switching state value according to the packet error rate, the wireless air interface bit error rate, the wireless channel busy rate and each weight coefficient; if the switching state value meets the switching threshold, the wireless access technology is switched.

9. A computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for switching a wireless access technology as claimed in any one of claims 1 to 7.

10. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the method for switching wireless access technology according to any one of claims 1 to 7 when calling the computer program in the memory.

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