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Task unloading method, device and system

A task and unloading technology, which is applied in the field of Internet of Things communication, can solve the problems of time extension and low system energy utilization rate, and achieve the effect of improving system energy utilization rate and reducing system task unloading delay

Pending Publication Date: 2022-04-15
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] The embodiment of the present application provides a task offloading method, device and system, which are used to solve the problem of low system energy utilization and long time delay when multiple WDs in the WPCN perform task offloading in the prior art

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  • Task unloading method, device and system
  • Task unloading method, device and system

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the application clearer, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are the Claim some of the examples, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0027] In the embodiment of this application, "and / or" describes the association relationship of associated objects, indicating that there may be three relationships, for example, A and / or B, which may mean: A exists alone, A and B exist at the same time, and B exists alone , where A and B can be singular or plural.

[0028] figure 1 It is a schematic diagram of a system architecture of a WPCN network ac...

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Abstract

The embodiment of the invention provides a task unloading method, a task unloading device and a task unloading system, which are used for a wireless power supply communication network (WPCN), and comprise the following steps of: inputting environmental parameters of each WD at the beginning of a current time frame into a deterministic policy depth gradient (DDPG) model; the environment parameters comprise the residual to-be-unloaded data volume L and the residual energy E of each WD at the beginning of the current time frame, so that an unloading strategy of each WD at the current time frame output by the DDPG model is obtained, and the unloading strategy comprises backscattering time ta, active transmission time tb and active transmission power Pa; each WD transmits the to-be-unloaded data volume in each time frame according to the determined unloading strategy until all the to-be-unloaded data volumes are transmitted, so that each WD in the WPCN can fully utilize energy and almost complete task unloading at the same time regardless of the to-be-unloaded task volume of each WD, the task unloading time delay of the system is reduced, and the task unloading efficiency is improved. And the energy utilization rate of the system is improved.

Description

technical field [0001] The embodiment of the present application relates to the technical field of Internet of Things communication, and in particular to a task offloading method, device and system in a Wireless Powered Communication Network (WPCN). Background technique [0002] With the landing of 5G technology, wireless devices (Wireless Devices, WDs) in the Internet of Things (The Internet of Things, referred to as IOT) will usher in explosive growth. In IoT communication, since WDs usually have resource and energy constraints, time delay and energy consumption are two important factors that need to be considered. [0003] Mobile Edge Computing (MEC) offloads computing-intensive tasks to nearby MEC servers through WDs, executes the tasks on the MEC server, and receives the task processing results returned by the MEC server to reduce the task processing of WDs. delay. [0004] Wireless Powered Communication Networks (WPCNs for short) is a wireless network formed by combi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/30H04W24/02H04W28/06
Inventor 高昂耿天立段渭军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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