Abstract
In the space-ground integrated networks, many tasks come from different access networks, such as cellular network, Wireless Fidelity (WIFI), Satellite network, Unmanned Aerial Vehicle (UAV) and so on. And these tasks have different priorities in general. Therefore, how to couple these tasks in the core network and design a low computational complexity and high-efficiency task processing strategy is a big challenge. In this paper, the concept of virtual queues is introduced to improve the performance of the space-ground integrated networks. The task queue can be split into several virtual queues according to their priorities and the type of access networks. To evaluate the performance of virtual queues, the system performance index is defined. Finally, the system performance of the space-ground integrated networks is analyzed in detail. The result can be applied into the design of the space-ground integrated networks.
Highlights
The next-generation cellular networks are expected to provide communication services for different application users anywhere and anytime, such as traditional voice/video, smart city, automotive car or ship, unmanned aerial vehicle, marine monitoring, IoT and intelligent industry [1]–[7]
For space-ground integrated networks, the tasks maybe come from different access networks, such as cellular network, WiFi, satellite network and so on
SIMULATION SETUP AND PARAMETER SETTING In this subsection, we assume that M task nodes and one center task server randomly locate in the space-ground integrated networks
Summary
The next-generation cellular networks are expected to provide communication services for different application users anywhere and anytime, such as traditional voice/video, smart city, automotive car or ship, unmanned aerial vehicle, marine monitoring, IoT and intelligent industry [1]–[7]. Being different from the existing studies that mainly focus on the issue of computation offloading, [17] investigates the problem of cooperative data sharing among peers to overcome the data dissymmetry, especially with the presence of dynamic and heterogeneous network They design a data downloading/uploading queuing mechanism and propose an online algorithm which could obtain a utility arbitrarily close to the offline optimum. In [24], the authors classify data packets in UAVs at each layer of a multi-layer UAV network into incumbent packets and relayed packets, and propose a traffic service scheme for variable classes of packets They minimum total packet delay is achieved by optimally allocating spectrum and power resources among layers of the UAV network. The concept of virtual queues is introduced to improve the performance of the space-ground integrated networks. (3) the performance of virtual queues for space-ground integrated networks is analyzed in detail based on queuing theory.
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