Future Space Networks: Toward the Next Giant Leap for Humankind

Abdelsadek, Mohammed Y.; Chaudhry, Aizaz U.; Darwish, Tasneem; Erdoğan, Eylem; Kurt, Güneş Karabulut; Madoery, Pablo G.; Yahia, Olfa Ben; Yanıkömeroğlu, Halim

doi:10.1109/tcomm.2022.3228611

Cited by 44 publications

(13 citation statements)

References 226 publications

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“…To compare the performance of the routing schemes described in Section II, we have adapted and extended Dtnsim, a discrete event-driven simulator developed in the Omnet++ framework. DtnSim was originally presented in [28] and is available as open-source software in a public repository 1 .…”

Section: A Simulation Environmentmentioning

confidence: 99%

Routing Heterogeneous Traffic in Delay-Tolerant Satellite Networks

Madoery

Kurt

Yanıkömeroğlu

et al. 2023

IEEE J. Radio Freq. Identif.

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Delay-tolerant networking (DTN) offers a novel architecture that can be used to enhance store-carry-forward routing in satellite networks. Since these networks can take advantage of scheduled contact plans, distributed algorithms like the Contact Graph Routing (CGR) can be utilized to optimize data delivery performance. However, despite the numerous improvements made to CGR, there is a lack of proposals to prioritize traffic with distinct quality of service (QoS) requirements. This study presents adaptations to CGR to improve QoScompliant delivery ratio when transmitting traffic with different latency constraints, along with an integer linear programming optimization model that serves as a performance upper bound. The extensive results obtained by simulating different scenarios show that the proposed algorithms can effectively improve the delivery ratio and energy efficiency while meeting latency constraints.

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Section: A Simulation Environmentmentioning

confidence: 99%

Routing Heterogeneous Traffic in Delay-Tolerant Satellite Networks

Madoery

Kurt

Yanıkömeroğlu

et al. 2023

IEEE J. Radio Freq. Identif.

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“…This is in addition to their ultradense deployment and interconnection using high speed intersatellite links (ISLs). This paves the way for a real integration between satellite and terrestrial networks in a unified spaceterrestrial network as discussed in [9].…”

mentioning

confidence: 95%

Broadband Connectivity for Handheld Devices via LEO Satellites: Is Distributed Massive MIMO the Answer?

Abdelsadek

Kurt

Yanıkömeroğlu

et al. 2023

IEEE Open J. Commun. Soc.

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Significant efforts are being made to integrate satellite and terrestrial networks into a unified wireless network. One major aspect of such an integration is the use of unified user terminals (UTs), which work for both networks and can switch seamlessly between them. However, supporting broadband connectivity for handheld UTs directly from low Earth orbit (LEO) satellite networks is very challenging due to link budget reasons. This paper proposes using distributed massive multiple-input multiple-output (DM-MIMO) techniques to improve the data rates of handheld devices with a view to supporting their broadband connectivity by exploiting the ultra-dense deployment of LEO satellites and high-speed inter-satellite links. In this regard, we discuss DM-MIMO-based satellite networks from different perspectives, including the channel model, network management, and architecture. In addition, we evaluate the performance of such networks theoretically by deriving closed-form expressions for spectral efficiency and using extensive simulations based on actual data from a Starlink constellation. The performance is compared with that of collocated massive MIMO connectivity (CMMC) and single-satellite connectivity (SSC) scenarios. The simulation results validate the analytical results and show the superior performance of DM-MIMO-based techniques compared to CMMC and SSC modes for improving the data rates of individual users.

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“…Currently, there is a lot of interest in the satellite industry to transform Low-Earth Orbit (LEO) satellites into 24/7 connected nodes of an Internet-like space network where they can autonomously communicate among themselves, streaming data as it is generated on-board, and thus enabling real-time applications [1], [2]. Proposed methods include enhancing ground station network capabilities while increasing their size [3], moving towards higher frequency bands (i.e., Ka/V/Q bands) and optical telescopes [4].…”

Section: Introductionmentioning

confidence: 99%