Abstract
Unmanned aerial vehicle (UAV) is a flight device with power and energy based on computer program control, which has the characteristics of small size, light weight, high maneuverability and low cost. With its characteristics, UAV can play an important role in military and civil fields. However, due to the broadcast nature of wireless communication and inherent air-to-ground line-of-sight channel, UAV wireless communication system is more vulnerable to security threats. On the basis of traditional encryption technology, the secrecy capacity of the UAV communication system can be improved by introducing physical layer security. This article aims to study the security of the physical layer in the UAV communication system, and summarizes the latest research results on the safety communication involving UAVs on the physical layer, such as trajectory optimization, power allocation, user scheduling and cooperative UAVs. Further, some potential research directions and challenges in physical layer security of UAV system are discussed.
Highlights
At present, with the reduction of cost and the miniaturization of equipment, from the exclusive equipment in the military field to the popularization in the civil and commercial fields, the Unmanned aerial vehicle (UAV) market is gradually opening up, bringing new valuable opportunities for the future wireless communication industry
Since UAVs are at high altitude when carrying out communication missions, the air-to-ground (A2G) line-ofsight (LoS) channel can provide a powerful channel advantage compared with the ground communication channel which is seriously affected by fading and shadow
Due to the opportunities and challenges brought by the UAV communication system, this article provides an important overview of the physical layer security (PLS) issues based on UAV communication, and discusses the potential security attacks of UAV communication systems from two aspects: passive eavesdropping and active interference, providing corresponding emerging technologies
Summary
With the reduction of cost and the miniaturization of equipment, from the exclusive equipment in the military field to the popularization in the civil and commercial fields, the UAV market is gradually opening up, bringing new valuable opportunities for the future wireless communication industry. The management and distribution of keys is more difficult due to the rapid mobility of UAVs. And relying on computational complexity does not guarantee complete secrecy, which would be ineffective if the enemy had powerful computing facilities. Relying on computational complexity does not guarantee complete secrecy, which would be ineffective if the enemy had powerful computing facilities In this case, physical layer security (PLS) was proposed and developed as a key supplementary technology for secure wireless communication[3]. Due to the opportunities and challenges brought by the UAV communication system, this article provides an important overview of the PLS issues based on UAV communication, and discusses the potential security attacks of UAV communication systems from two aspects: passive eavesdropping and active interference, providing corresponding emerging technologies. The future research direction of this topic is put forward
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