Space-Integrated-Ground Information Networks ›› 2021, Vol. 2 ›› Issue (2): 35-44.doi: 10.11959/j.issn.2096-8930.2021018

Special Issue: 专题:空间组网与交换技术

• Special Issue: Space Networking and Switching Technology • Previous Articles     Next Articles

Inter-Satellite Cooperative Computing Scheme Driven by Business Graph in LEO Satellite Network

Xiaobo GUO1, Zhiyuan REN2, Wenchi CHENG2, Zhe JI3   

  1. 1 The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China
    2 State Key Laboratory of Integrated Services Networks, XiDian University, Xi’an 710071, China
    3 School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Revised:2021-03-07 Online:2021-06-20 Published:2021-06-01
  • Supported by:
    Key Research and Development Plan of Ministry of Science and Technology(2019YFB1803305)

Abstract:

Low earth orbit-satellite network (LEO-SN) has the advantages of wide coverage and short satellite-to-earth link, and has become a current hot research fi eld.A business graph-driven inter-satellite collaborative computing method in LEO-SN was proposed to solve the problem of high transmission delay when the task was o? oaded to the cloud computing center.This method shielded the dynamics of LEO-SN by relying on the weighted time expansion graph model, combined multiple satellite computing resources, and dispatches tasks in the form of a directed acyclic graph to the satellites in the transmission path, thereby realizing the "computing while transmitting” of user services in the satellite cluster.The simulation results showed that when the data volume was 5 MB, the latency performance of on-orbit collaborative computing was improved by 58.9% compared to ground cloud computing.

Key words: low earth orbit-satellite network, time expanded graph, inter-satellite cooperative computing

CLC Number: 

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