In the case of emergency scenarios communication infrastructure might be destroyed, impairing communication abilities in the disaster area. In such situation device-to-device (D2D) communication networking plays an essential role to overcome the communication loss. To provide a reliable communication network, D2D devices are combined with airborne drones. The D2D devices provide a relay service while being able to transmit their own data. The airborne drones offer additional relay functionality and provide considerably reduced latency compared with D2D communication networks without any airborne drones. In this article, we will illustrate a large dynamic communication network (LDCN) and demonstrate its feasibility for even more than 64 000 D2D communication devices in the case of realistic channel conditions including path loss and fading. It will be shown that the illustrated LDCN is truly infrastructure-less, that is, no infrastructure or backbone or base station functionality need to be reinstalled. Therefore, the airborne drones do not take over any coordination services. The illustrated LDCN has a simple packet switching architecture and since all communication is localized it is robust and fully flexible. In addition, no specific radio interface or preferred multiple access scheme such as code division multiple access or time division multiple access are required.

中文翻译：

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大型设备到设备通信网络，包括用于紧急情况的机载无人机

在紧急情况下，通信基础设施可能被破坏，影响灾区的通信能力。在这种情况下，设备到设备 (D2D) 通信网络在克服通信丢失方面起着至关重要的作用。为了提供可靠的通信网络，D2D 设备与机载无人机相结合。D2D 设备提供中继服务，同时能够传输自己的数据。与没有任何机载无人机的 D2D 通信网络相比，机载无人机提供额外的中继功能并显着减少延迟。在本文中，我们将说明一个大型动态通信网络 (LDCN)，并在包括路径损耗和衰落在内的真实信道条件的情况下，证明其适用于甚至超过 64 000 个 D2D 通信设备的可行性。将显示所示出的LDCN确实是无基础设施的，即不需要重新安装基础设施或骨干网或基站功能。因此，机载无人机不接管任何协调服务。所示的 LDCN 具有简单的分组交换架构，并且由于所有通信都是本地化的，因此它是稳健且完全灵活的。此外，不需要特定的无线电接口或优选的多址方案，例如码分多址或时分多址。所示的 LDCN 具有简单的分组交换架构，并且由于所有通信都是本地化的，因此它是稳健且完全灵活的。此外，不需要特定的无线电接口或优选的多址方案，例如码分多址或时分多址。所示的 LDCN 具有简单的分组交换架构，并且由于所有通信都是本地化的，因此它是稳健且完全灵活的。此外，不需要特定的无线电接口或优选的多址方案，例如码分多址或时分多址。