QoS-Aware Resource Placement for LEO Satellite Edge Computing

Abstract

With the advent of large LEO satellite communication networks to provide global broadband Internet access, interest in providing edge computing resources within LEO networks has emerged. The LEO Edge promises low-latency, high-bandwidth access to compute and storage resources for a global base of clients and IoT devices regardless of their geographical location.Current proposals assume compute resources or service replicas at every LEO satellite, which requires high upfront investments and can lead to over-provisioning. To implement and use the LEO Edge efficiently, methods for server and service placement are required that help select an optimal subset of satellites as server or service replica locations. In this paper, we show how the existing research on resource placement on a 2D torus can be applied to this problem by leveraging the unique topology of LEO satellite networks. Further, we extend the existing discrete resource placement methods to allow placement with QoS constraints. In simulation of proposed LEO satellite communication networks, we show how QoS depends on orbital parameters and that our proposed method can take these effects into account where the existing approach cannot.

Network Simulators for Satellite-Terrestrial Integrated Networks: A Survey

“…Both logical and real-world satellite constellations have been referred to for generating the network topology. In addition to the classical Walker constellation, real-world LEO constellations are widely used in satellite terrestrial integrated network simulations, e.g., Iridium used in [47], [57], [58], Kuiper used in [55], [59], Telesat used in [55] and Starlink used in [53], [55], [59]- [61].…”

“…Space Information Network-oriented Simulators (e.g., [27], MACHETE [30], CogSWEL [52], GEMINI [59], SATSIM [60]) DVB Satellite-oriented Simulators (e.g., Trunks, SNS3 [43], OpenSAND [61], SatSysSim [62])…”

“…ESTNeT [52] https://github.com/estnet-framework/estnet https://github.com/estnet-framework/estnet-docker FLoRaSat [72] https://gitlab.inria.fr/jfraire/florasat DLinkEm [76] https://github.com/ptrsen/DLinkEm [61] https://github.com/pfandzelter/LLEOSCN-CDN-Sim SMN Simulator [78] https://github.com/Joonwoo-MNC/SMN-Simulator Celestial [58] https://github.com/OpenFogStack/celestial [59] https://github.com/pfandzelter/optimal-leo-placement 5G-SpaceLab [80] https://5gspacelab.uni.lu/ Stargaze [81] https://github.com/patrickkon/Stargaze not been fully exploited in STIN simulations and there is still huge room for improvement.…”

“…An extended version of the SILLEO-SCNS LEO satellite network simulator is proposed and used in [59] for QoSaware resource placement in LEO satellite edge computing, which is publicly available 33 . The extension supports SGP4 simplified perturbation models and the WGS84 world geodetic system.…”