Utilization and Analysis of Resource Mobility in Space Information Networks
Yiting Zhu, Runzi Liu, Min Sheng, Yang Li-qin, Jiandong Li, Weihua Wu, Jianping Liu · Journal of Communications and Information Networks · 2019
In space information networks, resource mobility is an important factor affecting the network performance, which not only results in challenges in resource management but also brings opportunities to the improvement of network service capability. In order to explore the restriction and improvement mechanism of resource mobility on network performance, we firstly use the time-expanded resource relationship graph to represent the moving behavior of multidimensional resources and the collaborative relationship between different resources. Then by jointly considering the number of disjoint resource combinations, the length of moving time window, and the parameter of resource independence, we propose (k, n, L) degree of freedom on resource combination as a metric measuring performance gain resulted from resource mobility. Furthermore, the analysis of resource mobility is transformed into the problem of finding disjoint paths in the graph, and the tradeoff relationship between QoS requirements of task and resource mobility utilization is discussed. Finally, the tradeoff between the gain of resource mobility utilization and the payment of service process delay is revealed through simulation.