Satellite-ground Integrated Communication Network Design Based On Distributed Data Center

With the development of science,human beings could not explore a wider and deeper space with the limitations of traditional computer network.But ground network has improved the ability of storage and operation.Distributed datacenter provides wilder interfaces for service access.Meanwhile,traditional satellite communication system,which use single satellite mode,has exposed its limitation about resource allocation and single business.Thus,satellite network has become research hotspots.Combine to the above,construct satellite-ground network by applying ground-based and space-based information system together becomes an inexorable trend.We do research in this context.We focus on two aspects.The one is deployment of network resource.Due to limited capacity of satellite network,it is unwise choice that deploy datacenter components on satellite.So how to schedule resource reasonably based on different features between satellite and ground is our major concern.We take multiple factors into account,such as the cost of internal transfer,external request,transmission cost of satellite to satellite and satellite to ground,to optimize the allocation of network resource by using integer linear programming(ILP).Proposed network provides a competitive platform for large-scale data transmission and processing.The other is that we analyse the problem about survivability of satellite-ground network.The survivability of network represents recovery capability after attacks.We design ILP for two different scenes-link failure and node failure.As to link failure,we design different link failure between inter satellite link,satellite-ground link and ground link,and ILP to optimize network resource allocation.We design a fast protection mechanism for the scene of node failure through providing backup around adjacent node.System keeps normal operation even if some node are damaged.In the end of paper,we make simulation and verification of the method.