The Low Latency,High Reliable System For 5G And The Simulation Design And Implementation

With the evolution of the next generation of mobile communication system and the arrival of the mobile Internet era,5G technologies raised in response to the proper time and conditions.5G systems will meet the new demands not only in the reliability,delay,capacity and other characteristics,but also must meet some specific scenarios."Low latency and high reliability" is one of the four application scenarios for 5G.And traffic efficiency and safety is one of the important applications for low latency and high reliability scenario.In this scenario,the information transmission between vehicles or vehicle and base station is used to ensure co-driving,so low delay and high reliability of data transmission can effectively prevent accidents.The aim of this article is to develop the system simulation platform for the low latency and high reliability performances,and to develop a new technology test platform to verify the key technologies and system performances.In this paper,the main contents are research on technical solution for low latency and high reliability scenario by vehicle and infrastructure(V2I)communication system simulation platform.This article is based on vehicle networking communication,combined with the virtual modeling and scene simulation technology,research the V2 I communication system simulation platform design and implementation scheme,and gives the simulation results and its analysis.The main research contents are as follows:(1)Research the technologies of low latency and high reliability technologies,and verify the impact of HARQ retransmission mechanism and OFDMA technology on delay and reliability.(2)Research vehicle communication simulation technologies.Focus on the application characteristics and scenario of vehicle networking communication,and introduce the relevant scene modeling and virtual simulation technology.Based on the theoretical analysis of the path algorithm and vehicle following model,this paper provides the theoretical basis for the vehicle model in the simulation platform.(3)Design and implement scenario layout,channel model,vehicle behavior model and the master control model to build the low latency and high reliability simulation platform.Based on different messages,we carry on the simulation of latency and high reliability simulation platform,present the simulation results,and analyze the different performance of different messages in vehicular communication.(4)The simulation platform verified that OFDMA technology increased SINR by 25 dB,HARQ technology increased the packet success transmission rate to 98.8%,and the E2 E delay reduced to 7.5ms.The shorter TTI duration value reduces the E2 E delay of 98.8% packets in 5ms.