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Dynamic relay access for D2D-aided low-latency and high-reliability communications
Science China Information Sciences ( IF 8.8 ) Pub Date : 2021-01-14 , DOI: 10.1007/s11432-020-2911-0
Chun Wu , Mingming Wu , Yulan Gao , Yue Xiao , Xiaojian You

Device-to-device (D2D) communications allow direct connections among devices to lower transmission latency and network loads of the existing cellular mobile networks. To fully exploit the benefits of D2D communications, relay access is one of the critical challenges upon employing the optimal cooperative relay user equipments (UEs) for data forwarding. The existed relay access approaches usually neglect the inherent motivation that whether the relay is reluctant to forward the information of other UEs based on its status, such as limited battery, service cost and social ties. In this paper, we jointly investigate both the transmission delay and the reliability performance for designing a relay access scheme combined with the impacts of the physical layer and the social layer. Meanwhile, considering the user mobility and status, a dynamic relay access model is constructed with the utility function of the weighted average of latency and social trust level under the long-term constraints. To solve this problem, Lyapunov framework is proposed for converting it into a renewal-reward system towards infinite time horizon, and numerical results show the benefits of the proposed scheme compared with other schemes under dynamic scenarios, as it can lower the latency while guaranteeing the reliability of relay access.



中文翻译:

D2D辅助的低延迟和高可靠性通信的动态中继访问

设备到设备(D2D)通信允许设备之间的直接连接,以降低传输延迟和现有蜂窝移动网络的网络负载。为了充分利用D2D通信的优势,中继访问是采用最佳协作中继用户设备(UE)进行数据转发时的关键挑战之一。现有的中继接入方法通常忽略了内在动机,即中继是否不愿意根据其状态来转发其他UE的信息,例如有限的电池,服务成本和社会纽带。在本文中,我们结合物理层和社交层的影响,共同研究传输延迟和可靠性性能,以设计中继访问方案。同时,考虑到用户的移动性和状态,在长期约束下,利用延迟和社会信任度的加权平均值的效用函数构建了动态中继访问模型。为了解决这个问题,提出了将Lyapunov框架转换为面向无限时间范围的续签奖励系统的方法,数值结果表明,该方案与动态场景下的其他方案相比具有优势,因为它可以降低时延,同时又保证了中继访问的可靠性。

更新日期:2021-01-18
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