An active-passive hybrid unloading method and device based on backscatter communication

Abstract

The invention discloses an active-passive hybrid unloading method and device based on backscatter communication, which belongs to the technical field of wireless communication. The method includes: S1: establishing a mobile edge computing system model; S2: establishing a communication between a base station and a user equipment Matching relationship; S3: Obtain the energy collected by each user equipment during the wireless energy transmission process; S4: Obtain the energy consumption and time required for local calculation of each user equipment, where the local calculation is parallel to the active and passive offloading process; S5: Calculate The energy consumption and transmission delay of each user equipment in the active and passive offloading process; S6: set communication constraints including delay, transmission power, and task allocation, and minimize the total energy consumption of user equipment based on S4 and S5, and obtain Optimal offloading strategies for individual user devices. The invention makes full use of the characteristics of low power consumption in backscattering transmission, can prolong the service life of user equipment, and improves the operation performance of the mobile edge computing network.

Description

technical field [0001] The present invention belongs to the technical field of wireless communication, and more specifically relates to an active-passive hybrid unloading method and device based on backscatter communication. Background technique [0002] With the rapid development of IoT and 5G technologies, future wireless networks will connect hundreds of millions of end-user devices, including wireless sensors, smart cameras, wearable electronic user devices, and vehicle-mounted communicators. At the same time, user equipment also needs to support more and more new application tasks with low latency and high computing requirements, such as face recognition and virtual reality. Such applications tend to consume large amounts of energy, severely reducing the battery life of the user's device. Coupled with the physical size limitation of user equipment, its computing power and power are very limited, resulting in longer response time and becoming a bottleneck for user quali...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides an active-passive hybrid offloading method and device based on backscatter communication, aiming at minimizing the total energy consumption of user equipment in the system, and determining the active-passive hybrid offloading The optimal strategy, including the task division scheme of each user equipment, the matching selection with the base station and the transmission power of active transmission, and then solve the problem of short working life of the user equipment

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