Cybertwin-Assisted Mode Selection in Ultra-Dense LEO Integrated Satellite-Terrestrial Network

Xin Zhang;Bo Qian;Xiaohan Qin;Ting Ma;Jiachen Chen;Haibo Zhou;Xuemin Sherman Shen
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Abstract

Ultra-dense low earth orbit (LEO) integrated satellite-terrestrial network (ULISTN) has become an emerging paradigm to support massive access of Internet of things (IoT) in beyond fifth generation mobile networks (B5G). In ULISTN, there are two communication modes: cellular mode and satellite mode, where IoT users assessing terrestrial small base stations (TSBSs) and terrestrial-satellite terminals (TSTs) respectively. However, how to optimize the network performance and guarantee self-interests of the operator and IoT users in ULISTN is a challenging issue. In this paper, we propose a cybertwin-assisted joint mode selection and dynamic pricing (JMSDP) scheme for effective network management in ULISTN, where cybertwin serves as the intelligent agent. In JMSDP, the operator determines optimal access prices of TSBSs and TSTs, while each user selects the access mode according to access prices. Specifically, the operator conducts the Stackelberg game aiming at maximizing average throughput depending on the mode selection results of IoT users. Meanwhile, IoT users as followers adopt the evolutionary game to choose an access mode based on the access prices provided by the operator. Simulation results show that the proposed JMSDP can improve the average throughput and reduce the delay effectively, comparing with random access (RA) and maximum rate access.
超密集LEO星-地一体化网络中cybertwin辅助模式选择
超密集低地球轨道星地一体化网络(ULISTN)已成为支持第五代移动网络(B5G)以后物联网(IoT)大规模接入的新兴范例。在ULISTN中,有两种通信模式:蜂窝模式和卫星模式,物联网用户分别评估地面小型基站(TSBSs)和地面卫星终端(TSTs)。然而,如何在ULISTN中优化网络性能,保证运营商和物联网用户的自身利益,是一个具有挑战性的问题。在ULISTN中,我们提出了一种基于网络孪生的联合模式选择和动态定价(JMSDP)方案,其中网络孪生作为智能代理。在JMSDP中,运营商确定TSBSs和TSTs的最优接入价格,用户根据接入价格选择接入方式。具体而言,运营商根据物联网用户的模式选择结果,进行以平均吞吐量最大化为目标的Stackelberg博弈。同时,作为追随者的物联网用户根据运营商提供的接入价格,采用进化博弈的方式选择接入方式。仿真结果表明,与随机存取(RA)和最大速率存取相比,JMSDP能有效提高平均吞吐量,降低时延。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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