Research On Data Transmission Scheduling Strategies In Energy Harvesting Body Area Networks

In the research field of Wireless Body Area Network(WBAN),energy-related studies have received considerable attention.In traditional WBANs,issues such as high battery replacement costs and short battery lifetimes have been persistent challenges,affecting the stability and sustainability of this technology.The emergence of Energy Harvesting Wireless Body Area Network(EH-WBAN)presents a new opportunity to address these problems.EH-WBAN utilizes energy sources from the surrounding environment and converts them into electrical energy through energy harvesters to power sensors and devices,enabling long-term and stable operation.However,EH-WBAN still faces several challenges.Among them,the conflict between energy harvesting and data transmission impacts the network’s performance,while reliability and integrity issues affect the network’s stability.Data transmission scheduling strategies are one of the important means to tackle these problems.Specifically,by optimizing data transmission scheduling strategies,it is possible to minimize node energy consumption,enhance energy utilization efficiency during data transmission,and prolong node lifespan.Additionally,optimizing data transmission scheduling strategies can improve the reliability of data transmission,ensuring data accuracy and integrity.Therefore,it is of great significance to optimize and research data transmission scheduling strategies.This paper focuses on this problem and proposes a corresponding solution,with the following main research elements:(1)An energy balance model is proposed to address the problem that kinetic energy is easily collected but the energy collected by each node is uneven in EH-WBANs.The model combines energy harvesting technology and information energy homologation technology to achieve energy replenishment and energy redistribution of nodes,and reduces the influence of environmental factors on energy collection by using kinetic energy generated from human activities as external energy replenishment.The model avoids the situation that nodes cannot perform data transmission due to insufficient energy in data transmission scheduling,thus improving the reliability and stability of data transmission.(2)A MAC protocol named TD-MAC is proposed based on the coefficient of variation method to solve the conflict between energy harvesting and data transmission in the data transmission scheduling strategy.This protocol is designed for EH-WBANs,and uses an objective weighting method to incorporate critical factors into the evaluation model and assign corresponding allocation criteria to allocate weights.Based on these weights,TD-MAC performs time slot allocation to further ensure energy balance among nodes and reduce packet loss.By properly allocating time slots,this protocol achieves a balance between data transmission and energy harvesting,thus maximizing energy harvesting while reducing packet loss and improving the success rate of data transmission.The performance of the proposed MAC protocol was tested through simulation experiments,and the experimental results show that TD-MAC can guarantee energy balance among nodes,reduce packet loss,facilitate the long-term operation of EH-WBANs,and improve the efficiency of data transmission.(3)A node energy prioritized coloring link scheduling protocol,NEPCLS,based on graph coloring algorithm is proposed to address the data transmission reliability issue in the data transmission scheduling strategy.the protocol fully considers the link characteristics of EH-WBANs,and solves the link conflict problem by converting communication graphs into conflict graphs and optimizing them through generation strategies,and then coloring them in descending order according to the remaining energy of nodes through a graph-theoretic approach.This approach ensures conflict-free data aggregation and reduces the aggregation delay,thus guaranteeing the long-lasting operation of EH-WBANs.In addition,NEPCLS has high scalability and flexibility,and is applicable to various node types and multiple communication scenarios.The performance of the proposed scheme was tested by simulation experiments,and the experimental results showed that NEPCLS has good performance in terms of remaining energy variance,packet delivery rate and aggregation delay.The use of NEPCLS further guarantees the node energy balance,ensures conflict-free aggregation,reduces the aggregation delay time,and also improves the packet delivery rate.The proposed scheme is significant for improving the quality of EH-WBANs data transmission.(4)An EH-WBAN experimental data visualization system was built to analyze and process data generated during experiments.By visualizing experimental data,the system makes it easier to understand and use,quickly identifying potential trends,improving decision-making efficiency and data quality,and promoting innovation.