面向5G的低时延、高可靠系统及仿真设计与实现

发布时间：2018-06-14 09:50

本文选题：低时延 + 高可靠　；参考：《电子科技大学》2017年硕士论文

【摘要】：随着下一代移动通信系统的演进和移动互联网时代的到来,5G技术应运而生。5G系统不仅在可靠性、时延以及容量等特性上提出了新的需求,还必须满足一些特定的场景。“低时延高可靠场景”为5G的四大应用场景之一。其中,交通效率与安全是低时延高可靠技术场景的重要应用。在该应用场景中,车辆间通过信息交互来保证协同驾驶,数据传输中低时延和高可靠性能有效避免事故的发生。本文的研究目标是建立低时延高可靠系统仿真平台,来进行各项关键技术的仿真与验证。本文的内容主要为通过搭建车辆对基础设施(Vehicle-to-infrastructure,V2I)场景来进行低时延、高可靠性场景技术方案研究与验证。本文将以车联网通信为基础,结合虚拟建模和场景仿真技术,深入研究基于V2I通信系统的低时延高可靠仿真平台的设计及实现方案,并给出时延与可靠性的仿真结果及其分析。主要研究内容有:(1)研究低时延与高可靠性相关技术原理,验证混合自动重传请求(Hybrid Automatic Repeat Request,HARQ)机制和正交频分多址接入技术(Orthogonal Frequency Division Multiple Access,OFDMA)对时延和可靠性的影响。(2)研究车联网通信仿真技术,从车联网通信的应用特点和场景着手,介绍有关的场景建模技术。对仿真平台中车辆模型的路径算法和车辆跟驰模型进行理论分析,为车辆模型的搭建提供理论基础。(3)通过设计与实现场景布局、信道模型模块、车载行为模块和主控程序模块来建立低时延高可靠仿真平台。基于不同业务的应用,对低时延高可靠仿真平台进行了仿真验证,并分析了不同业务在车载通信中的性能。(4)仿真平台验证了OFDMA让信干噪比(Signal to Interference plus Noise Ratio,SINR)提高了约25dB,HARQ技术让数据包的成功率提高到了98.8%,E2E时延降低到7.5ms。较小的发射时间间隔(Transmission Time Interval,TTI)将98.8%的数据包的E2E时延降低到5ms以内。
[Abstract]:With the evolution of the next generation mobile communication system and the arrival of the mobile Internet era, 5G technology emerges as the times require. 5G system not only puts forward new requirements in reliability, delay and capacity, but also has to meet some specific scenarios. "low delay and high reliability scenario" is one of the four application scenarios of 5G. Among them, traffic efficiency and safety are important applications of low delay and high reliability technology scenarios. In this application scenario, the vehicles can communicate with each other to ensure cooperative driving, and the data transmission with low delay and high reliability can effectively avoid accidents. The purpose of this paper is to establish a system simulation platform with low delay and high reliability to simulate and verify the key technologies. The main content of this paper is to study and verify the technology scheme of low delay and high reliability scenarios by setting up vehicle-to-infrastructure V2I scene. In this paper, the design and implementation of a high reliability simulation platform based on V2I communication system with low delay and high reliability is studied, based on the virtual modeling and scene simulation technology. The simulation results and analysis of delay and reliability are given. The main contents of this study are as follows: (1) to study the technical principles related to low delay and high reliability. Verify the effect of hybrid Automatic repeat request HARQ mechanism and orthogonal Frequency Division multiple access (OFDMA) on delay and reliability. This paper introduces the technology of scene modeling. This paper analyzes the path algorithm of vehicle model and car-following model in the simulation platform, which provides the theoretical basis for the vehicle model building. It designs and implements the scene layout and channel model module. The vehicle behavior module and the main control program module are used to establish a high reliability simulation platform with low delay. Based on the application of different services, the simulation of low delay and high reliability simulation platform is carried out. The performance of different services in vehicle-borne communication is analyzed. The simulation platform verifies that OFDMA can improve the signal-to-noise ratio (signal-to-interference plus noise ratio) about 25dB HARQ and reduce the delay of E2E to 7.5ms7.5ms. Transmission time Intervalator TTI (TTI) reduces the E2E delay of 98.8% packets to less than 5ms.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5;TP391.9;U495

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