  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.
