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Latency-Aware Offloading in Integrated Satellite Terrestrial Networks

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posted on 24.04.2020 by Wiem Abderrahim, Osama Amin, Mohamed-Slim Alouini, Basem Shihada
Next-generation communication networks are expected to integrate newly-used technologies in a smart way to ensure continuous connectivity in rural areas and to alleviate the traffic load in dense regions. The prospective access network in 6G should hinge on satellite systems to take advantage of their wide coverage and high capacity. However, adopting satellites in 6G could be hindered because of the {additional latency introduced}, which is not tolerable by all traffic types. Therefore, we propose a traffic offloading scheme that integrates both the satellite and terrestrial networks to smartly allocate the traffic between them while satisfying different traffic requirements. Specifically, the proposed scheme offloads the Ultra-Reliable Low Latency Communication (URLLC) traffic to the terrestrial backhaul to satisfy its stringent latency requirement. However, it offloads the enhanced Mobile Broadband (eMBB) traffic to the satellite since eMBB needs high data rates but is not always sensitive to delay. Our scheme is shown to reduce the transmission delay of URLLC packets, decrease the number of dropped eMBB packets, and hence improve the network's availability. Our findings highlight that the inter-working between satellite and terrestrial networks is crucial to mitigate the expected high load on the limited terrestrial capacity.

Funding

This work was supported in part by the Center of Excellence for NEOM Research at King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Makkah Prov., Saudi Arabia.

History

Email Address of Submitting Author

WIEM.ABDERRAHIM@GMAIL.COM

ORCID of Submitting Author

0000-0001-5896-2307

Submitting Author's Institution

King Abdullah University of Science and Technology (KAUST)

Submitting Author's Country

Saudi Arabia

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