融合区块链与边缘计算系统中基于最小化网络时延的TOSML优化方案

Minimizing network delay based optimal offloading scheme TOSML in joint blockchain and edge computing system

在融合区块链与边缘计算系统中,如何缩短任务执行时长以帮助矿工节点以最快的速度获得数字货币奖励是极为重要的问题.通过考虑不同任务卸载方式的性能差异,提出了一种能耗受限的最小化时延任务卸载方案TOSML.首先对融合区块链与边缘计算系统中的任务执行时长和能量消耗进行了数学分析,然后在系统总能耗及终端能耗均受限的条件下,建立了以最小任务执行时长为目的的数学优化模型,最后利用遍历算法对上述优化模型进行求解.在仿真中,对系统的能量消耗、执行时长等参数进行了对比分析,仿真结果证明此策略能够有效提升矿工节点挖矿速度.

In the joint blockchain and edge computing system,how to shorten the time spend in task execution to assist the miner get the digital currency reward in a quickly way is an extremely important issue.In this paper,by considering the difference in performance of different task off loading methods,an energy-limited minimum delay task off loading scheme namely TOSML is proposed.Firstly,the mathematical analysis of task execution time and energy consumption in the joint blockchain and edge computing system is carried out.Thereafter,under the condition that the system’energy consumption and terminal end’s energy consumption are limited,a mathematical optimization model with the purpose of minimum task execution time is formulated.The above optimization model is then solved resort to traversal algorithm.The parameters such as energy consumption and execution time of the system are compared and analyzed in the simulation.The simulation results prove that the proposed strategy can effectively improve the mining speed of miner.