Research On Dynamic Management And Resource Planning Technology Of Space Information Network

Space information network(SIN)is an important comprehensive information network,which are composed of various orbiting satellites,approaching spacecraft as well as corresponding ground segments and network management center.These entities are connected together by inter-satellite links(ISL),terrestrial communication networks.As a national important infrastructure,the development and construction of space information network not only affects and improves the quality of people’s life,but also extensively penetrates into the fields of national security,urban planning,weather forecast,disaster relief and disaster reduction,ecological assessment,in-orbit scientific experiments,etc.,providing ubiquitous,continuous and stable information services for people’s work and life,research and exploration.Due to the satellite orbit position,the number of Crosslinks,the transmission rate of the star,between the satellite nodes,the satellite and the ground nodes can not maintain the state of continuous end-to-end communication,data transmission must also pass special routing mechanism converts the original end-to-end communication link to hop-to-hop mode via the transmission of multiple intermediate nodes many times.In daily management,the SIN management center needs to evaluate the running state of the network in real time.When exception occurs,it needs to evaluate the influence area and this determines whether the service capability of the entire network was badly affected by exceptions so that the resources can be made promptly planning in time.This paper mainly studies the following two issues:(1)Assessment of outliers on the impact of the entire network service capability.The impact of node abnormalities on the operation of the whole network is multifaceted in which uplink data injection includes instruction injection is a key foundation for maintaining the operation of the entire network.This paper focuses on this aspect.(2)How to shorten the completion time of constellation data annotation in the daily management and maintenance of time slot table,routing table and other data update operations,when the required annotation data of visible satellites and invisible satellites are the same?Based on the architecture and work processes of SIN,this paper clarifies typical 7 main parts,such as network management center,the ground operate station,satellite nodes and data relay satellites.etc,as well as task planning,resourse planning,tracking implementation and other business processes.By sorting out the business process of SIN,this paper also discusses the challenges to network management center when the network node is abnormal.The specific content is as follows:1.The concept of dynamic link tree of space information network is put forward,and the transformation algorithm from routing table to dynamic link tree is designed,and the routing table is transformed into a dynamic link tree form with expandable edge,which can visually show the connection between nodes and the corresponding hop number.2.Define the impact rate on abnormal nodes,which is used to describe the impact of one or more satellite node anomalies on the service capability of the entire network.Since space information network relies on inter-satellite links for data transmission,it is necessary to calculate the quantity of nodes that cannot directly establish links with the ground due to exceptions,and their proportion of the entire network.Simulation experiments show that it can visually reflect the impact range of outliers,accurately estimate the influence rate of abnormal nodes on the upside injection work of the entire network.3.In response to the problem of satellite constellation routing mechanisms based on ISL,a routing algorithm of uplink data injection is proposed to solve the frequent updating of time slot table,routing table and other data injection operations in the maintenance of inter-satellite links in the network.The experimental results show that the data is consistent in the constellation in the case where the algorithm significantly reduces the resource occupancy of the entire constellation data,and greatly improves the speed of completing the data,shortening the time.