Decentralized Congestion Control for 5G-NR-V2X Sidelink

초록

The speed, density, and channel occupancy of vehicles in vehicular networks can vary significantly. Scenario dynamics may need a large number of message exchanges as vehicle density rises, which might easily cause radio channel congestion issues. For the purpose of reducing channel congestion in cellular vehicle-to-everything (C-V2X) sidelink, ETSI ITS-G5 has defined a Decentralized Congestion Control (DCC) method that primarily affects transmission parameters (e.g, message delay, transmission power, and data rate). In this paper, the basic DCC methods are introduced and evaluated which also analyzes the current challenges and solutions for congestion control algorithms and schemes.