Study of Low-speed Data Later Response of DSRC Protocol

Dedicated Short-Range Communication(DSRC) is an important and basic communication protocol in Intelligent Transportation Systems(ITS) area,which has been widely used in Intelligent Transportation Systems,such as highway electronic toll collection(ETC) system and city road and bridge congestion charge system,which provides reliable and efficient data transmission for vehicle-infrastructure communication and vehicle-vehicle communication.This paper,referring to the CEN DSRC standards,discusses the later response of low speed data in the DSRC protocol,and gives some methods to solve this problem in order to complete the GB DSRC standards.Meanwhile,this method can be used in the practical ITS system which is based on the DSRC protocol.