A dynamic multi-beam resource allocation algorithm for large low Earth orbit(LEO)constellation based on on-board distributed computing is proposed in this paper.The allocation is a combinatorial optimization process u...A dynamic multi-beam resource allocation algorithm for large low Earth orbit(LEO)constellation based on on-board distributed computing is proposed in this paper.The allocation is a combinatorial optimization process under a series of complex constraints,which is important for enhancing the matching between resources and requirements.A complex algorithm is not available because that the LEO on-board resources is limi-ted.The proposed genetic algorithm(GA)based on two-dimen-sional individual model and uncorrelated single paternal inheri-tance method is designed to support distributed computation to enhance the feasibility of on-board application.A distributed system composed of eight embedded devices is built to verify the algorithm.A typical scenario is built in the system to evalu-ate the resource allocation process,algorithm mathematical model,trigger strategy,and distributed computation architec-ture.According to the simulation and measurement results,the proposed algorithm can provide an allocation result for more than 1500 tasks in 14 s and the success rate is more than 91%in a typical scene.The response time is decreased by 40%com-pared with the conditional GA.展开更多
为了更好地实践云计算提供廉价按需服务的宗旨,提出了一种在模糊聚类基础上,基于两级调度模式的任务调度(FCTLBS,fuzzy clustering and two level based task scheduling)算法,新算法设置用户调度和任务调度2个等级。对资源进行性能模...为了更好地实践云计算提供廉价按需服务的宗旨,提出了一种在模糊聚类基础上,基于两级调度模式的任务调度(FCTLBS,fuzzy clustering and two level based task scheduling)算法,新算法设置用户调度和任务调度2个等级。对资源进行性能模糊聚类;根据任务参数计算资源偏好,使不同偏好任务在不同聚类中选择,缩小了选择范围,更好地反映了任务需求。仿真实验表明,本算法较之同类算法具备一定的优越性。展开更多
In this paper,we first describe the concept of task scheduing in Parallel and Distributed Computing(PDC) ,then illustrate the task scheduling model in PDC and the way of calculating the execution cost and communicatio...In this paper,we first describe the concept of task scheduing in Parallel and Distributed Computing(PDC) ,then illustrate the task scheduling model in PDC and the way of calculating the execution cost and communication cost ,and lastly discuss an approach to estimate the communication contention overhead.展开更多
基金This work was supported by the National Key Research and Development Program of China(2021YFB2900603)the National Natural Science Foundation of China(61831008).
文摘A dynamic multi-beam resource allocation algorithm for large low Earth orbit(LEO)constellation based on on-board distributed computing is proposed in this paper.The allocation is a combinatorial optimization process under a series of complex constraints,which is important for enhancing the matching between resources and requirements.A complex algorithm is not available because that the LEO on-board resources is limi-ted.The proposed genetic algorithm(GA)based on two-dimen-sional individual model and uncorrelated single paternal inheri-tance method is designed to support distributed computation to enhance the feasibility of on-board application.A distributed system composed of eight embedded devices is built to verify the algorithm.A typical scenario is built in the system to evalu-ate the resource allocation process,algorithm mathematical model,trigger strategy,and distributed computation architec-ture.According to the simulation and measurement results,the proposed algorithm can provide an allocation result for more than 1500 tasks in 14 s and the success rate is more than 91%in a typical scene.The response time is decreased by 40%com-pared with the conditional GA.
文摘为了更好地实践云计算提供廉价按需服务的宗旨,提出了一种在模糊聚类基础上,基于两级调度模式的任务调度(FCTLBS,fuzzy clustering and two level based task scheduling)算法,新算法设置用户调度和任务调度2个等级。对资源进行性能模糊聚类;根据任务参数计算资源偏好,使不同偏好任务在不同聚类中选择,缩小了选择范围,更好地反映了任务需求。仿真实验表明,本算法较之同类算法具备一定的优越性。
文摘In this paper,we first describe the concept of task scheduing in Parallel and Distributed Computing(PDC) ,then illustrate the task scheduling model in PDC and the way of calculating the execution cost and communication cost ,and lastly discuss an approach to estimate the communication contention overhead.
