Abstract
Ultra-reliable low-latency communications (URLLCs) and the adoption of unmanned aerial vehicles (UAVs) for network coverage improvement have emerged as key enabling communication paradigms for the successful deployment of mobile communication services envisioned in both the fifth-generation (5G) and the sixth-generation (6G) networks. This paper provides a comprehensive survey about the current state-of-the-art (SoA) on UAV-enabled URLLC networks. The core idea is to highlight the main characteristics of this new network concept as well as its critical aspects. We first perform an overview of URLLC by illustrating the main features and related implementation challenges. Subsequently, an in-depth discussion on UAV-enabled networks is provided, with a special emphasis on how URLLCs and UAV communication can be classified as complementary paradigms. Finally, a comprehensive analysis and classification of the current research advancements on UAV-enabled URLLCs networks is carried out. This paper is concluded by pointing out some the open challenges and our visions related to future directions which should be undertaken in order to pave the way towards the practical implementation of this promising network architecture.
Highlights
T HE concept of Internet of Things (IoT) represents one of the key communication scenarios in the vision for both 5G and 6G mobile communication networks
The LoS probability and the network availability are strictly concave with the communication distance
Engineering insights on the packet size design and more understanding of the packet error rate incurred in transmission have been provided
Summary
T HE concept of Internet of Things (IoT) represents one of the key communication scenarios in the vision for both 5G and 6G mobile communication networks Under this perspective, as illustrated, it is foreseen that wireless connectivity will be available for any type of device that may benefit from being coonnected [1], enabling a wide range of emerging applications, such as industrial automation, intelligent transportation, telemedicine, tactile internet, and virtual/augmented reality (VR/AR) [2]–[5]. Improvements, i.e., at least two orders of magnitude For this reason, ranging from the introduction of the finite block length (FBL) concept at the physical layer to the integration of innovative technologies into upper-layers of the network protocol stack, significant efforts are underway to characterize and understand 5G/6G wireless communication systems [9]–[11]. Such approaches are introduced and discussed within the subsections
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