Research, Implementation and Practice of Congestion Control Mechanism in LTE-V2X

Abstract

C-V2X (Cellular Vehicle-to-Everything) is the vital enabling technology of Intelligent Connected Vehicle (ICV) and Intelligent Transportation System (ITS). Standardization of LTE (Long Term Evolution)-V2X has been completed in Third Generation Partnership Project (3GPP), but the congestion control mechanism is not specified and up to implementation. This paper mainly focuses on the congestion control mechanism in LTE-V2X. The measurements and adjustable transmitting parameters related to the congestion control mechanism is introduced. Then the implementation of congestion control mechanism in LTE-V2X is proposed. The field test results are presented to verify the effectiveness with system performance metrics.