CU-MAC: A MAC Protocol for Centralized UAV Networks with Directional Antennas

Aijing LI  Guodong WU  Chao DONG  Lei ZHANG  

IEICE TRANSACTIONS on Communications   Vol.E103-B   No.5   pp.537-544
Publication Date: 2020/05/01
Publicized: 2019/11/06
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019EBP3089
Type of Manuscript: PAPER
Category: Network
MAC,  UAV networks,  quality of service,  directional antennas,  

Full Text: FreePDF(1.4MB)

Media Access Control (MAC) is critical to guarantee different Quality of Service (QoS) requirements for Unmanned Aerial Vehicle (UAV) networks, such as high reliability for safety packets and high throughput for service packets. Meanwhile, due to their ability to provide lower delay and higher data rates, more UAVs are using frequently directional antennas. However, it is challenging to support different QoS in UAV networks with directional antennas, because of the high mobility of UAV which causes serious channel resource loss. In this paper, we propose CU-MAC which is a MAC protocol for Centralized UAV networks with directional antennas. First, we design a mobility prediction based time-frame optimization scheme to provide reliable broadcast service for safety packets. Then, a traffic prediction based channel allocation scheme is proposed to guarantee the priority of video packets which are the most common service packets nowadays. Simulation results show that compared with other representative protocols, CU-MAC achieves higher reliability for safety packets and improves the throughput of service packets, especially video packets.