Resource scheduling technology as an important means to achieve the optimal allocation of SAGIN resources, plays a vital role in Earth observation, emergency communications and other fields, through the in-depth understanding and analysis of the research status of the integrated network resource scheduling field, the current resource scheduling technology is not yet perfect, it is difficult to meet the multi-satellite collaboration, network topology real-time changes, massive users as the characteristics of the scheduling needs. Starting from the research point of multi-dimensional resources, this paper considers the synergy between resources, proposes a multi-dimensional resource vector model, and on this basis proposes a multi-dimensional resource collaborative optimization scheduling algorithm to achieve unified scheduling from the global perspective. In the simulation experiment, it is proved that the indicators such as the number of task completions, total tasks revenues, average revenue and scheduling decision-making time can be effectively improved, among which the number of task completions is increased by 10%-30%, the total tasks revenue is increased by 30%-60%, and the scheduling decision-making time is saved by about 30%.
Space-Air-Ground Integrated network (SAGIN) that integrates satellite system, air network and ground communication network has attracted extensive research interests in recent years, for its high value to practical services and its wide applications in communication. Nevertheless, it also faces many unprecedented challenges due to its heterogeneity, selforganization, time variability and other characteristics. In order to solve the problems of unstable inter-domain neighbor relationship, frequent routing update and slow routing convergence in space-air-ground integrated network, a link fault recovery method of space-air-ground integrated network based on time sequence link weight graph is proposed in this paper. This method is based on the infrastructure of software-defined network, and introduces time-varying characteristics, designs a dynamic model of link weight change, and proposes a link fault recovery method. The simulation results show that by considering link resources and node resources, compared with the link detection and recovery scheme of softwaredefined satellite network, this method can effectively solve the problem that it is unable to build an effective recovery path because of the unstable inter domain relationship in the space-air-ground integrated network, and can effectively find a recovery path with the lower path cost, low end-to-end delay and high reliability.
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