Latency versus Reliability in LEO Mega-Constellations: Terrestrial, Aerial, or Space Relay?
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ArticleKAUST Department
Communication Theory Lab, King Abdullah University of Science and Technology, 127355 Thuwal, Makkah, Saudi ArabiaCommunication Theory Lab
Electrical and Computer Engineering
Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division
Electrical and Computer Engineering Program
Date
2022-04-19Permanent link to this record
http://hdl.handle.net/10754/676326
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Large low earth orbit (LEO) mega-constellation systems have been designed and deployed as a global backbone to provide ubiquitous connectivity across the world. However, due to the high traffic load/congestion arisen from the required numerous information relay and forwarding, it is a challenge for LEO mega-constellation systems to set up long-distance connections between two remote terrestrial users for real-time communications, which requires strict low latency. Other than inter-LEO satellite links (ILSL), introducing third-party relays, such as terrestrial, aerial, and satellite relays, is an alternative way to improve the latency performance for wide-area deliveries of real-time traffic. However, the reliability of the transmitted signal will unavoidably degrade, because of the increased path-loss attributed to long-distance relaying transmissions. Then, to reveal the principle that the third-party relays affect the latency and reliability, in this work, an LEO satellite-terrestrial communication scenario is considered, in which two remote terrestrial users communicate with each other via an LEO mega-constellation system. Analysis models are built up to investigate the end-to-end time delay and outage performance while considering different ILSL, terrestrial, aerial, and satellite relay assisted transmission scenarios. More specifically, by applying geometrical probability theory, exact/approximated closed-form analytical expressions have been derived for average time delayCitation
Pan, G., Ye, J., An, J., & Alouini, S. (2022). Latency versus Reliability in LEO Mega-Constellations: Terrestrial, Aerial, or Space Relay. IEEE Transactions on Mobile Computing, 1–1. https://doi.org/10.1109/tmc.2022.3168081Sponsors
Supported in part by the NSF of China under Grant 62171031 and in part by the Office of Sponsored Research at KAUSTPublisher
IEEEAdditional Links
https://ieeexplore.ieee.org/document/9760009/https://ieeexplore.ieee.org/document/9760009/
https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9760009
ae974a485f413a2113503eed53cd6c53
10.1109/TMC.2022.3168081