Research On Strategy Proposals And Key Technologies Of IVICS(Intelligent Vehicle Infrastructure Cooperative Systems) Based On 4G+ Network And GPS

Intelligent Vehicle Infrastructure Cooperative System is an integrated application of information,communications,the next generation of the Internet and other key technologies as a whole,which is inseparable from the progress of wireless communication network technology.In this paper,the intelligent vehicle-road cooperative system based on 4G+ network and GPS is studied.The system communication and its positioning technology are analyzed.Through the network deployment,the overall performance of the network can be evaluated.Completed the following work:(1)The main physical layer technical characteristics of LTE system is analyzed: Define the basis of OFDMA multiple access technology and multi-antenna MIMO technology,and give a brief description of TD-LTE physical layer channel,which is a wireless network planning method.The study provided the basis.Finally,the impact of UE measurement and CQI measurement index on LTE is analyzed.At the same time,the license parameters are determined according to the number of PRBs to implement LTE parameter admission control.(2)Research on the precise positioning of the intelligent vehicle-road cooperative system based on GPS and the actual road test test.For satellite error,orbit error,atmospheric propagation error,etc.,this method can effectively reduce the error,and thus improve the accuracy of dynamic positioning to centimeters.(3)Analyzed the status quo and development of 4G+ network,proposed 4G+ key technology carrier management,mobility management scheme and carrier activation scheme,analyzed the influence of active network activation parameter setting,CA terminal penetration rate on the proportion of CA traffic,analyzed The variation of SCC activation ratio under typical activation parameters of each manufacturer.(4)Analyze key MIMO technologies is researched and the performance test analysis on Massive MIMO performance is analyzed,and finally 4G+ technology policy and CA network deployment are proposed.