Method for representing resources of spatial information network based on time varying graph

Abstract

The invention discloses a method for representing resources of a spatial information network based on a time varying graph. An implementation process of the method comprises the following steps of initializing a set of satellites, a set of ground stations and a set of to-be-observed target nodes of a to-be-represented spatial information network; dividing a planning cycle of the to-be-represented spatial information network into M isometric time intervals; computing whether an observed object is within the observation range of the observation satellites and the relay satellites and the ground stations are within the communication range of the observation satellites to obtain visible conditions between every two of the observation satellites, the relay satellites, the ground stations and the observed object according to the movement locus of a star in an ephemeris; and lastly, constructing a resource time varying graph to represent observation, storage and transmission resources of the spatial information network according to the set of nodes in the network and the visible conditions. According to the method, the time-varying characteristics and the relevancy of the resources in the network are represented by using the resource time varying graph, so that the complexity for resource management in the spatial information network is remarkably reduced and the method can be used for analysis and management of observation, storage and transmission resources of the spatial information network.

Description

technical field [0001] The invention belongs to the technical field of space information, and in particular relates to a space information network resource characterization method, which can be used for analysis, management and implementation of space information network observation, storage, and transmission resources. Background technique [0002] The space information network is an important infrastructure in my country and an important platform to support earth observation, ocean navigation, emergency rescue, navigation and positioning, air transportation, and aerospace measurement and control. However, due to the high cost of space information network facilities such as satellites and ground stations, and the long satellite launch cycle, my country's space information network has long faced a situation where resources are in short supply and demand exceeds supply. In order to alleviate the contradiction between resource shortage and business development, it is very impo...

AI Technical Summary

Problems solved by technology

For example, in Laura Barbulescu's article "Scheduling Space–Ground Communications for the Air Force Satellite Control Network", it only focuses on how to model the task process and design an efficient scheduling method, but fails to explain the nature of space network resources in both space and time. The transformation relationship on the dimension, which affects the efficient utilization of spatial information network resources

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