Overall Design of Satellite Networks for Internet Services with QoS Support

Abstract

The satellite network is useful in various applications because of its coverage, broadcast capability, costs independent of the distance, and easy deployment. Recently, thanks to the advanced technologies in the satellite communication, the high throughput satellite system with mesh connections has been applied to the Internet backbone. In this paper, we propose a practical overall design of the satellite network to provide Internet services with quality of service (QoS) support via the satellite network. In the proposed design, we consider two service types such as delay-tolerance and delay-sensitive services allowing the long propagation delay of the satellite link. Since it is crucial to evaluate the user satisfaction in the application layer for various environments to provide the QoS support, we also define the performance metrics for the user satisfaction and derive the major factors to be considered in the QoS policy. The results of the performance evaluation show that there are factors such as the traffic load and burstiness in the QoS policy for the delay-tolerance service with volume-based dynamic capacity in the satellite network. For the delay-sensitive service with rate-based dynamic capacity, it is additionally indicated that it is important for the estimation of effective data transmission rate to guarantee the QoS. Furthermore, it is shown that the small data size has an effect on the slight reduction of the QoS performance in the satellite network.

IoT-Based Research Equipment Sharing System for Remotely Controlled Two-Photon Laser Scanning Microscopy

“…As the MQTT protocol supports QoS, the optimal QoS for real-time communication can be set [ 23 ]. In addition, while using the MQTT, a standby database can be placed between the gateway and the server [ 24 ], and the current protocol can be upgraded or attached parallel to other wireless communication protocols to address network failures [ 25 , 26 , 27 ]. By applying such stabilization to the system in this study, it is believed it would ensure the rapid and stable remote operation of shared equipment, even using a wireless network.…”

Regional Coverage Analysis of LEO Satellites with Kepler Orbits

“…The vision of a dense satellite network to provide the ubiquitous Internet access all over the Earth including basic capacity calculations for such network is presented in [2]. The Quality-of-Service (QoS) issues in satellite mesh networks with delay-sensitive as well as delay-tolerant traffic are studied in [3] assuming the link layer and network layer protocols. The link state routing for satellite networks having regular topology and embracing the whole Earth while experiencing uneven traffic distribution over different geographical areas is investigated in [4].…”