A 5G MEC task offloading method and system with adaptive power in Internet of Vehicles

Abstract

This invention discloses a 5GMEC task offloading method and system with adaptive power in vehicle-to-everything (V2X) networks, relating to the field of task offloading technology. The method includes: firstly, determining the distance between the vehicle and the center of the roadside unit, dividing this distance into near and far distance intervals, and applying different step power; secondly, calculating the link's transmission capacity based on link parameters, calculating link loss and channel gain; thirdly, calculating the pre-offloading delay based on the task size, and calculating the total task processing delay; fourthly, if the delay exceeds the system's set total delay limit, adjusting the vehicle's transmit power to the maximum; and fifthly, dynamically implementing task offloading based on link status and total task delay, which maximizes the stability of the offloaded link quality and improves the success rate of task resource preemption and offloading.

Description

Technical Field

[0001] This invention relates to the field of task offloading technology, specifically a 5GMEC task offloading method and system for adaptive power in vehicle networking. Background Technology

[0002] Mobile Edge Computation (MEC) utilizes cloud nodes deployed at the network edge to provide computing and storage services to user devices. This allows information to be processed at the edge, significantly reducing transmission latency between users and data centers compared to traditional mobile cloud computing that uses data centers. It also reduces the burden on the core network and enables more timely collection of real-time information from end users, thus providing higher-quality services. Introducing MEC technology into the Internet of Vehicles (IoV) can effectively solve the problem of insufficient computing and storage resources in in-vehicle terminals, while simultaneously meeting the high reliability and low latency requirements brought about by high-speed mobility and safety. However, in IoV systems incorporating MEC, how to efficiently offload and schedule computing tasks remains a topic worthy of further research.

[0003] The existing technology (CN117915402A) proposes a 5G MEC task offloading method, CTD-MOM, based on hierarchical latency. This method selects the link with the lightest load for offloading based on the total latency of each link and a hierarchical latency coefficient. Similar to most traditional offloading methods, this approach does not adequately consider the impact of vehicle speed on task offloading, nor the limitations of terminal transmit power, thus failing to optimize the efficiency of roadside units in handling tasks and resulting in a low success rate for the task offloading process. Summary of the Invention

[0004] To address the shortcomings mentioned in the background section, the present invention aims to provide a method and system for 5GMEC task offloading with adaptive power in vehicle networking.

[0005] Firstly, the objective of this invention can be achieved through the following technical solution: a method for 5GMEC task offloading with adaptive power in a vehicle network, the method comprising the following steps: The system acquires information about the currently loading task and the distance between the vehicle and the nearest roadside unit; wherein the information about the currently loading task includes the task size and computational complexity; the system divides the distance between the vehicle and the nearest roadside unit into distance intervals, and adaptively adjusts the distance intervals to obtain the vehicle terminal's transmission power; wherein the distance intervals include a near-distance interval and a far-distance interval. The link transmission rate is calculated based on the preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and the vehicle terminal transmit power; the total task processing time is calculated based on the task size, computational complexity, and link transmission rate. If the total task processing time is greater than or equal to the preset task time limit, the vehicle terminal's transmission power will be adjusted to the preset maximum transmission power, and the total task processing time will be recalculated. If the recalculated total task processing time is still greater than or equal to the preset task time limit and the distance between the vehicle and the nearest roadside unit is within the short distance range, the corresponding task will be processed locally; otherwise, the task will be unloaded.

[0006] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the process of adaptively adjusting the vehicle terminal transmission power based on the divided distance interval, as follows: When the distance between the vehicle and the nearest roadside unit is less than or equal to the preset lower limit distance, the vehicle terminal transmission power is adjusted to the preset lower limit power. When the distance between the vehicle and the nearest roadside unit is greater than the preset lower limit distance but less than the preset upper limit distance, the vehicle terminal transmission power is calculated based on the preset lower limit distance, short-distance step power, short-distance step distance, and the difference between the distance between the vehicle and the nearest roadside unit and the preset lower limit distance. When the distance between the vehicle and the nearest roadside unit is equal to the preset upper limit distance, the vehicle terminal transmission power is adjusted to the preset upper limit power. When the distance between the vehicle and the nearest roadside unit is greater than the preset upper limit distance but less than or equal to the preset roadside unit coverage radius, the undetermined power is calculated based on the upper limit distance transmission power, long distance step power, long distance step distance, and the difference between the distance between the vehicle and the nearest roadside unit and the preset upper limit distance. The minimum value between the undetermined power and the preset upper limit power is taken as the final vehicle terminal transmission power.

[0007] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the preset link path loss is calculated based on the preset offloading link path loss constant and path loss coefficient, and in combination with the distance between the vehicle and the nearest roadside unit.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the process of calculating the link transmission rate based on preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and through the vehicle terminal's transmit power, as follows: The channel gain of the roadside unit is calculated based on the link path loss and the vehicle terminal transmit power. The signal-to-noise ratio of the roadside unit is calculated based on the channel gain and background noise of the roadside unit. The link transmission rate is finally calculated based on the processing bandwidth of the roadside unit, the signal-to-noise ratio of the roadside unit, and the transmission efficiency.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the process of calculating the total task processing time based on task size, computational complexity, and link transmission rate, as follows: Pre-set the waiting latency of the current task on the roadside unit and the computing power of the MEC server; The MEC processing latency of the task is calculated based on the ratio of computational complexity to the computing power of the MEC server. The transmission delay of the task on the roadside unit link is calculated based on the task size and link transmission rate. The total task processing time is obtained by summing the waiting delay of the current task on the roadside unit, the MEC processing delay of the task, and the transmission delay of the task on the roadside unit link.

[0010] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: the range of the near distance interval is an interval less than or equal to a preset lower limit distance, and an interval greater than the preset lower limit distance and less than or equal to a preset upper limit distance; The range of the long-distance interval is the interval that is greater than the preset upper limit distance and less than or equal to the preset roadside unit coverage radius.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the method further includes: if the recalculated total task processing time is still greater than or equal to the preset task time upper limit and the distance between the vehicle and the nearest roadside unit is in the close distance range, the range of the close distance range is the range less than or equal to the preset lower limit distance.

[0012] Secondly, in order to achieve the above objectives, this invention discloses a 5GMEC task offloading system with adaptive power in vehicle networking, comprising: The distance determination module is used to obtain information about the currently loading task and the distance between the vehicle and the nearest roadside unit; wherein, the information about the currently loading task includes the task size and computational complexity; the distance interval is divided based on the distance between the vehicle and the nearest roadside unit, and the vehicle terminal transmission power is obtained by adaptive adjustment based on the divided distance interval; wherein, the distance interval includes a near distance interval and a far distance interval; The time processing module is used to calculate the link transmission rate based on preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and through the vehicle terminal's transmit power; and to calculate the total task processing time based on task size, computational complexity, and link transmission rate. The task processing module is used to adjust the vehicle terminal's transmission power to the preset maximum transmission power and recalculate the total task processing time if the total task processing time is greater than or equal to the preset task time limit. If the recalculated total task processing time is still greater than or equal to the preset task time limit and the distance between the vehicle and the nearest roadside unit is within the short distance range, the corresponding task will be processed locally; otherwise, the task will be unloaded.

[0013] In another aspect of the present invention, in order to achieve the above-mentioned objective, a terminal device is disclosed, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. The memory stores the computer program capable of running on the processor. When the processor loads and executes the computer program, it employs a 5GMEC task offloading method for adaptive power in a vehicle network as described above.

[0014] In another aspect of the present invention, in order to achieve the above-mentioned objective, a computer-readable storage medium is disclosed, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is loaded and executed by a processor, a 5GMEC task offloading method for adaptive power in a vehicle network as described above is employed.

[0015] The beneficial effects of this invention are: This invention can adaptively calculate the transmission power of the vehicle terminal based on the distance between the center of the roadside unit and the vehicle; calculate the transmission capacity of the link based on the link parameters; calculate the MEC calculation delay of the task based on the task size, and calculate the total processing delay of the task; determine whether additional transmission power is needed based on the total processing time of the task; and dynamically implement task offloading based on the link status and task size; thus achieving a better offloading quality environment for the vehicle and improving the success rate of task offloading. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the method flow of the present invention; Figure 2 This is a schematic diagram of the workflow of the present invention; Figure 3 This is a diagram comparing the vehicle task unloading success rate of this invention with other algorithms; Figure 4 This is a schematic diagram comparing the average transmission power of the vehicle-mounted terminal for a single task under different distance conditions according to the present invention; Figure 5This is a schematic diagram of the system structure of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: like Figure 1 As shown, a method for 5GMEC task offloading with adaptive power in a vehicle-to-everything (V2X) network includes the following steps: S101: Obtain information about the currently loading task and the distance between the vehicle and the nearest roadside unit; wherein, the information about the currently loading task includes the task size and computational complexity; divide the distance interval based on the distance between the vehicle and the nearest roadside unit, and adaptively adjust the distance interval to obtain the vehicle terminal transmission power; wherein, the distance interval includes a near distance interval and a far distance interval; The process of adaptively adjusting the vehicle terminal's transmit power based on the defined distance intervals is as follows: When the distance between the vehicle and the nearest roadside unit is less than or equal to the preset lower limit distance, the vehicle terminal transmission power is adjusted to the preset lower limit power. When the distance between the vehicle and the nearest roadside unit is greater than the preset lower limit distance but less than the preset upper limit distance, the vehicle terminal transmission power is calculated based on the preset lower limit distance, short-distance step power, short-distance step distance, and the difference between the distance between the vehicle and the nearest roadside unit and the preset lower limit distance. When the distance between the vehicle and the nearest roadside unit is equal to the preset upper limit distance, the vehicle terminal transmission power is adjusted to the preset upper limit power. When the distance between the vehicle and the nearest roadside unit is greater than the preset upper limit distance but less than or equal to the preset roadside unit coverage radius, the undetermined power is calculated based on the upper limit distance transmission power, long distance step power, long distance step distance, and the difference between the distance between the vehicle and the nearest roadside unit and the preset upper limit distance. The minimum value between the undetermined power and the preset upper limit power is taken as the final vehicle terminal transmission power.

[0019] In this embodiment, the specific process is as follows: Setting: A passing vehicle in motion Currently loading task Task size Computational complexity (CPU consumption) ; Set the nearest roadside unit to the passing vehicle distance , Coverage radius Vehicle-mounted terminal transmission power Maximum transmission power Lower limit distance Upper limit distance Short-distance step distance Long-distance step distance Lower limit power Short-distance step power Long-distance step power ; When the condition is met At that time, the vehicle terminal's transmission power can be controlled at the lower limit power. When the conditions are met hour, At this point, it is possible to calculate when At that time, the transmission power of the vehicle-mounted terminal When the conditions are met hour, ,in, It is a minimum value function; The range of the near distance interval is the interval that is less than or equal to the preset lower limit distance, and the interval that is greater than the preset lower limit distance but less than or equal to the preset upper limit distance; The range of the long-distance interval is the interval that is greater than the preset upper limit distance and less than or equal to the preset roadside unit coverage radius.

[0020] S102: The link transmission rate is calculated based on the preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and the vehicle terminal transmission power; the total task processing time is calculated based on the task size, computational complexity, and link transmission rate. The preset link path loss is calculated based on the preset offloading link path loss constant and path loss coefficient, combined with the distance between the vehicle and the nearest roadside unit.

[0021] In this embodiment, the specific process is as follows: Set the path loss constant for the offload link. Road loss coefficient ; Calculate the traffic flow and roadside units Link path loss ,in, The common logarithm; Set background noise and the processing bandwidth of the roadside unit. Transmission efficiency ; Calculate roadside units Channel gain ,calculate signal-to-noise ratio ;calculate Link transmission rate ; The process of calculating the link transmission rate based on preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and by using the vehicle terminal's transmit power, is as follows: The channel gain of the roadside unit is calculated based on the link path loss and the vehicle terminal transmit power. The signal-to-noise ratio of the roadside unit is calculated based on the channel gain and background noise of the roadside unit. The link transmission rate is finally calculated based on the processing bandwidth of the roadside unit, the signal-to-noise ratio of the roadside unit, and the transmission efficiency. The specific process is as follows: Set up roadside units Waiting delay for the current task MEC server computing power ; Computational task MEC processing latency ,in, Represents a power function; Computational tasks exist Link transmission delay Calculate the total time required to process the task. ; S103: If the total task processing time is greater than or equal to the preset task time limit, the vehicle terminal transmission power is adjusted to the preset maximum transmission power, and the total task processing time is recalculated. If the recalculated total task processing time is still greater than or equal to the preset task time limit and the distance between the vehicle and the nearest roadside unit is within the short distance range, the corresponding task is processed locally; otherwise, the task is unloaded.

[0022] If the recalculated total task processing time is still greater than or equal to the preset task time limit and the distance between the vehicle and the nearest roadside unit is within the close distance range, the range of the close distance range is the range less than or equal to the preset lower limit distance.

[0023] Specifically, in this embodiment, a task time limit is set. If the conditions are met Then the transmission power of the vehicle terminal will be adjusted to the maximum, that is... Recalculate the total time required to process the task. If the conditions are still met and If the task is not found to be in the specified condition, it will be processed locally; otherwise, it will be sent to the MEC link for offloading. Specifically, the present invention will be further illustrated below through embodiments: The present invention will now be described in detail. The task status of the vehicle operation is shown in Table 1: Table 1 Distribution of Vehicle Operation Tasks The roadside unit Rsu information is shown in Table 2: Table 2 Distribution of Roadside Units The basic data is shown in Table 3: Table 3 Basic Data This example describes a 5G MEC task offloading method based on adaptive power in vehicle-to-everything (V2X) communication, including the following steps: adaptive adjustment of terminal transmit power, link capability calculation, comprehensive analysis of task time, and task offloading based on time limit. Step 1: Adaptive adjustment of terminal transmit power; Step 1-1: When the condition is met At that time, the vehicle terminal's transmission power can be controlled at the lower limit power. When the conditions are met hour, At this point, it is possible to calculate when At that time, the transmission power of the vehicle-mounted terminal When the conditions are met hour, ; by distance For example, Step 2: Link capacity assessment; Step 1-1: By distance For example, calculate the traffic flow between vehicles and roadside units. Link path loss ; Step 1-2: Calculate roadside units Channel gain ,calculate signal-to-noise ratio ;calculate Link transmission rate ; Step 3: Comprehensive analysis of task time; Step 3-1: Calculation Task MEC processing latency ; Step 3-2: Calculation Task exist Link transmission delay ; Calculate the total time required to process the task. ; Step 4: Unload the task based on a time limit; Total task time The conditions are not met. Therefore, the transmission power of the vehicle-mounted terminal remains unchanged, that is... Send the task to the MEC link for offloading; Simulation experiment: The performance of the APS-MOM task offloading method of this invention was compared and simulated on the MATLAB platform, and compared with the CTD-MOM 5G MEC task offloading method based on hierarchical latency previously published by the authors. The basic data information is shown in Table 3 above, and the results are shown in the appendix. Figures 3 to 4 As shown.

[0024] like Figure 3 The chart shows a comparison of the offloading success rates of our APS algorithm and the CTD algorithm. CTD-MOM uses latency-based hierarchical control; the more offloading tasks there are, the higher the service latency becomes, which reduces the offloading success rate and thus lowers resource utilization. In contrast, our APS algorithm adaptively adjusts the transmission power of the vehicle terminal based on the distance between the vehicle and the roadside unit as the number of onboard tasks increases, keeping the link transmission capacity within a relatively fixed range, thereby improving offloading reliability. Although the offloading success rate decreases with the increase in the number of tasks, the decrease is not significant. like Figure 4 The diagram shows a comparison of the transmit power of our APS algorithm and the CTD algorithm for a single task at different distances. The CTD-MOM algorithm has a fixed transmit power, which is distributed almost evenly among tasks. As the vehicle moves further from the center of the roadside unit, link loss increases, leading to higher service latency and reduced resource utilization. In contrast, our APS algorithm adaptively applies transmit power to each task based on the distance between the vehicle and the roadside unit. The further the distance, the higher the transmit power, until it reaches the maximum transmit power. This adaptive power approach improves link stability and the reliability of task offloading, thus allowing for more offloadable tasks.

[0025] Example 2: To achieve the above objective, based on Example 1, as follows... Figure 5 As shown, this invention discloses a 5GMEC task offloading system with adaptive power in vehicle networking, comprising: The distance determination module 11 is used to obtain information about the currently loading task and the distance between the vehicle and the nearest roadside unit; wherein, the information about the currently loading task includes the task size and computational complexity; the distance interval is divided based on the distance between the vehicle and the nearest roadside unit, and the vehicle terminal transmission power is obtained by adaptive adjustment based on the divided distance interval; wherein, the distance interval includes a near distance interval and a far distance interval. The time processing module 12 is used to calculate the link transmission rate based on preset link path loss, background noise, transmission efficiency and roadside unit processing bandwidth, and through vehicle terminal transmission power; and to calculate the total task processing time based on task size, computational complexity and link transmission rate. The task processing module 13 is used to adjust the vehicle terminal's transmission power to the preset maximum transmission power and recalculate the total task processing time if the total task processing time is greater than or equal to the preset task time limit. If the recalculated total task processing time is still greater than or equal to the preset task time limit and the distance between the vehicle and the nearest roadside unit is within the short distance range, the corresponding task will be processed locally. Otherwise, the task will be unloaded.

[0026] Based on the same inventive concept, this invention also provides a computer device, comprising: one or more processors, and a memory for storing one or more computer programs; the programs include program instructions, and the processor executes the program instructions stored in the memory. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, used to implement one or more instructions, specifically for loading and executing one or more instructions stored in a computer storage medium to implement the above-described method.

[0027] It should be further explained that, based on the same inventive concept, the present invention also provides a computer storage medium storing a computer program, which, when executed by a processor, performs the above-described method. This storage medium can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In the present invention, the computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0028] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A method for adaptive power 5G MEC task offloading in Internet of Vehicles, characterized in that, The method includes the following steps: The system acquires information about the currently loading task and the distance between the vehicle and the nearest roadside unit; wherein the information about the currently loading task includes the task size and computational complexity; the system divides the distance between the vehicle and the nearest roadside unit into distance intervals, and adaptively adjusts the distance intervals to obtain the vehicle terminal's transmission power; wherein the distance intervals include a near-distance interval and a far-distance interval. The link transmission rate is calculated based on the preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and the vehicle terminal transmit power; the total task processing time is calculated based on the task size, computational complexity, and link transmission rate. If the total task processing time is greater than or equal to the preset task time limit, the vehicle terminal's transmission power will be adjusted to the preset maximum transmission power, and the total task processing time will be recalculated. If the recalculated total task processing time is still greater than or equal to the preset task time limit and the distance between the vehicle and the nearest roadside unit is within the short distance range, the corresponding task will be processed locally; otherwise, the task will be unloaded. 2.The 5G MEC task offloading method with adaptive power in V2X of claim 1, wherein, The process of adaptively adjusting the vehicle terminal's transmit power based on the divided distance intervals is as follows: When the distance between the vehicle and the nearest roadside unit is less than or equal to the preset lower limit distance, the vehicle terminal transmission power is adjusted to the preset lower limit power. When the distance between the vehicle and the nearest roadside unit is greater than the preset lower limit distance but less than the preset upper limit distance, the vehicle terminal transmission power is calculated based on the preset lower limit distance, short-distance step power, short-distance step distance, and the difference between the distance between the vehicle and the nearest roadside unit and the preset lower limit distance. When the distance between the vehicle and the nearest roadside unit is equal to the preset upper limit distance, the vehicle terminal transmission power is adjusted to the preset upper limit power. When the distance between the vehicle and the nearest roadside unit is greater than the preset upper limit distance but less than or equal to the preset roadside unit coverage radius, the undetermined power is calculated based on the upper limit distance transmission power, long distance step power, long distance step distance, and the difference between the distance between the vehicle and the nearest roadside unit and the preset upper limit distance. The minimum value between the undetermined power and the preset upper limit power is taken as the final vehicle terminal transmission power. 3.The 5G MEC task offloading method with adaptive power in V2X of claim 1, wherein, The preset link path loss is calculated based on the preset offloading link path loss constant and path loss coefficient, combined with the distance between the vehicle and the nearest roadside unit. 4.The method of claim 1, wherein, The process of calculating the link transmission rate based on preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and by using the vehicle terminal's transmit power, is as follows: The channel gain of the roadside unit is calculated based on the link path loss and the vehicle terminal transmit power. The signal-to-noise ratio of the roadside unit is calculated based on the channel gain and background noise of the roadside unit. The link transmission rate is finally calculated based on the processing bandwidth of the roadside unit, the signal-to-noise ratio of the roadside unit, and the transmission efficiency. 5.The 5G MEC task offloading method with adaptive power in V2X of claim 1, wherein, The process of calculating the total task processing time based on task size, computational complexity, and link transmission rate is as follows: Pre-set the waiting latency of the current task on the roadside unit and the computing power of the MEC server; The MEC processing latency of the task is calculated based on the ratio of computational complexity to the computing power of the MEC server. The transmission delay of the task on the roadside unit link is calculated based on the task size and link transmission rate. The total task processing time is obtained by summing the waiting delay of the current task on the roadside unit, the MEC processing delay of the task, and the transmission delay of the task on the roadside unit link. 6.The method of claim 2, wherein, The range of the near distance interval is the interval that is less than or equal to the preset lower limit distance, and the interval that is greater than the preset lower limit distance but less than or equal to the preset upper limit distance; The range of the long-distance interval is the interval that is greater than the preset upper limit distance and less than or equal to the preset roadside unit coverage radius. 7.The method of claim 6, wherein, If the recalculated total task processing time is still greater than or equal to the preset task time upper limit and the distance between the vehicle and the nearest roadside unit is in the close distance range, the range of the close distance range is the range less than or equal to the preset lower limit distance. 8.A 5G MEC task offloading system with adaptive power in V2X, which adopts the 5G MEC task offloading method with adaptive power in V2X in any one of claims 1 to 7. include: The distance determination module is used to obtain information about the currently loading task and the distance between the vehicle and the nearest roadside unit; wherein, the information about the currently loading task includes the task size and computational complexity; the distance interval is divided based on the distance between the vehicle and the nearest roadside unit, and the vehicle terminal transmission power is obtained by adaptive adjustment based on the divided distance interval; wherein, the distance interval includes a near distance interval and a far distance interval; The time processing module is used to calculate the link transmission rate based on preset link path loss, background noise, transmission efficiency, and roadside unit processing bandwidth, and by using the vehicle terminal's transmit power; and to calculate the total task processing time based on task size, computational complexity, and link transmission rate. The task processing module is used to adjust the vehicle terminal's transmission power to the preset maximum transmission power and recalculate the total task processing time if the total task processing time is greater than or equal to the preset task time limit. If the recalculated total task processing time is still greater than or equal to the preset task time limit and the distance between the vehicle and the nearest roadside unit is within the short distance range, the corresponding task will be processed locally; otherwise, the task will be unloaded.

9. A terminal device comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, characterized in that, The memory stores a computer program that can run on the processor. When the processor loads and executes the computer program, it employs a 5GMEC task offloading method for adaptive power in a vehicle network, as described in any one of claims 1 to 7.

10. A computer-readable storage medium having stored therein a computer program, characterized in that, When the computer program is loaded and executed by the processor, it employs a 5GMEC task offloading method for adaptive power in a vehicle network as described in any one of claims 1 to 7.

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