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.

中文翻译：

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集成卫星地面网络中的延迟感知卸载

下一代通信网络有望以智能的方式集成新使用的技术，以确保农村地区的连续连接并减轻人口稠密地区的交通负担。6G中的预期接入网络应取决于卫星系统，以利用其广泛的覆盖范围和高容量。但是，由于引入了额外的延迟，因此并非所有业务类型都可以容忍6G卫星的采用。因此，我们提出了一种流量卸载方案，该方案将卫星网络和地面网络集成在一起，以在满足不同流量需求的同时，智能地在它们之间分配流量。特别，拟议的方案将超可靠的低延迟通信（URLLC）流量分流到地面回程，以满足其严格的延迟要求。但是，由于eMBB需要高数据速率，但并不总是对延迟敏感，因此它将增强的移动宽带（eMBB）流量转移给了卫星。我们的方案显示出可以减少URLLC数据包的传输延迟，减少丢弃的eMBB数据包的数量，从而提高网络的可用性。我们的发现突出表明，卫星网络和地面网络之间的互通对于缓解有限的地面容量上预期的高负荷至关重要。我们的方案显示出可以减少URLLC数据包的传输延迟，减少丢弃的eMBB数据包的数量，从而提高网络的可用性。我们的发现突出表明，卫星网络和地面网络之间的互通对于减轻有限的地面容量上的预期高负荷至关重要。我们的方案显示出可以减少URLLC数据包的传输延迟，减少丢弃的eMBB数据包的数量，从而提高网络的可用性。我们的发现突出表明，卫星网络和地面网络之间的互通对于缓解有限的地面容量上预期的高负荷至关重要。