共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
URLLC是5G三大应用场景之一,但5G现网全面支持URLLC业务仍存在一些问题。首先分析了URLLC R15版本支持低时延和高可靠的标准化关键技术,然后分析了R16版本支持TSN确定性需求技术方案和超高可靠性增强方案,为5G商用URLLC明确了需要引入的增强功能和面临的挑战。 相似文献
3.
5G标准规范体系的演进将致力于解决不同应用场景中的多样化、差异化性能指标,适用频谱资源的缺乏要求5G新空口频段能够同时承载超高速率、超低时延业务。根据3GPP研究计划与进展,5G研究初期以eMBB为主,直到成熟期完善URLLC的标准化。本文主要从物理层设计的角度出发对eMBB与URLLC KPI及相关技术进行了讨论与研究。为了实现不同参数集配置的两种业务模型在同一频段上共存,本文分析了四种应用场景下eMBB与URLLC的两种基本复用方法,旨在减少资源浪费,提升系统的频谱效率。 相似文献
4.
5.
6.
7.
智能体交互与虚实空间互动将成为未来垂直应用的重要新场景。分析了新场景对通信网络URLLC、确定性传输和定位能力的新需求,在总结了5G URLLC技术方案的基础上,提出计算-通信-控制的一体化设计架构。该架构融合了同步网、确定性传输网、通信-感知-定位一体化无线接入网,为URLLC性能增强提供了解决思路。 相似文献
8.
URLLC作为5G三大场景之一,具有超低时延和超高可靠的特性,成为传统通信切入垂直行业的重要突破口。首先分析了URLLC的低时延关键技术和高可靠关键技术,以及URLLC增强的相关技术,再以中国电信和中国联通的3.5 GHz网络为例,分析了URLLC在TDD网络的适应性。 相似文献
9.
URLLC作为5G三大场景之一,其具有超低时延和超高可靠的特性,可广泛应用于多个行业中。在URLLC低时延高可靠的关键技术研究的基础上,对TDD/FDD NR下的eMBB与URLLC空口数据收发时序和环回时延进行了对比分析,提出了URLLC网络部署建议。 相似文献
10.
随着第五代移动通信技术的不断发展,智能交通系统的建设已成为智慧城市建设进程中非常重要的环节,车联网又是智能交通系统中必不可少的组成部分。目前全球汽车使用量急剧上升,为提升人们出行体验,实现车、路、人以及基础设施之间的信息交互,需要一个具备高速大带宽以及高可靠低时延的通信(Ultra-Reliable Low-Latency Communication ,URLLC)网络支撑。而目前基于LTE技术的车联网不能满足URLLC的性能需求,因此提升车联网URLLC的性能成为车联网技术研究的重点。本论文回顾了车联网技术标准的发展历程,对URLLC在车联网应用场景的性能需求进行分析,并对提升车联网高可靠性和极低时延的研究方法进行总结。 相似文献
11.
12.
13.
14.
For the different random access requirements of the mixed scenarios of ultra-reliable low latency (URLLC) and massive machine type communications (mMTC) in MTC,a random access scheme based on devices grouping was proposed.The proposed scheme divided the MTC devices into several groups based on the timing advance (TA) information:for the URLLC scenario,preamble resources were reserved for core devices in each group,and the URLLC devices accessed the network via the contention-free mechanism,to satisfy the ultra-reliable low latency access requirement; for the mMTC scenario,the base station utilized the different TA information in different group to identify devices selecting the same preamble,and performed successive interference cancellation (SIC) algorithm to detect the data information,to satisfy the massive access requirement.Simulation results demonstrate that the proposed scheme can significantly increase the number of the successful devices. 相似文献
15.
16.
该文研究面向电网业务质量保障的5G 高可靠低时延通信(URLLC)的资源调度机制,以高效利用低频段蜂窝通信系统内有限的频谱和功率资源来兼顾电力终端传输速率和调度时延、调度公平性,保障不同电力业务的通信质量(QoS)。首先,基于URLLC的高可靠低时延传输特性,建立电力终端多小区下行传输模型。然后,提出面向系统下行吞吐量最大化的资源分配问题模型并对其进行分步求解,分别提出基于定价机制与非合作博弈的功率分配算法和基于调度时延要求的改进比例公平算法(DPF)动态调度信道资源。仿真结果表明,提出的资源调度方法能在保证一定传输可靠性和公平性的条件下降低电力终端调度时延,满足不同业务等级的QoS需求,与已知算法对比有一定的优越性。 相似文献
17.
Hamidreza Shariatmadari Ruifeng Duan Sassan Iraji Zexian Li Mikko A. Uusitalo Riku Jäntti 《International Journal of Wireless Information Networks》2017,24(3):317-327
Ultra-reliable low-latency communications (URLLC) is a new feature to be considered for the fifth generation (5G) cellular systems. This feature is essential for the support of envisioned mission-critical applications, particularly in the realm of machine-type communications. These applications require that the messages, which are generally short-length packets, to be exchanged between a source and a destination with the high level of reliability and within a short period of time. The characteristics of URLLC do not fit directly in the conventional communication models. For instance, most of the existing communication models are developed considering moderate levels of reliability, neglecting the small effects of the feedback errors. However, even such small errors cannot be ignored for URLLC. This paper proposes a communication model for URLLC considering the reliabilities of both data and control channels. Then, the optimal and sub-optimal resource allocations are derived. We show that the proposed sub-optimal resource allocations have lower computational complexities with a negligible performance degradations compared to that of the optimal solutions. The results reveal that the possibility of performing only one retransmission can significantly reduce the required radio resources needed for data delivery compared to the case of performing a single transmission round. 相似文献
18.
The FuTURE Project in China 总被引:2,自引:0,他引:2
《Communications Magazine, IEEE》2005,43(1):70-75
When research on beyond third generation (B3G) mobile communications had just stepped into its startup period, a project called Future Technologies for a Universal Radio Environment (FuTURE) was launched in China. The goal of the project is to support theoretical research and applicable evaluation of the proposed technologies for B3G mobile communications. In this article the application requirements, technological challenges, and some potential solutions of B3G are discussed, and some key technologies employed in the FuTURE demonstration system are introduced. 相似文献
19.
5G主要有eMBB、mMTC和uRLLC共3种应用场景,不同的场景有着不同的性能需求,需要按需分配网络资源,因此5G需要进行云化重构.本文从运营商的角度,首先提出了网络基础设施重构方案以实现软硬件解耦和基础资源管理,提出了网络功能重构方案以实现5G各项应用功能,最后提出了运营重构的解决方案,列举了5G的运营方式和网络开通方式,并举例介绍了保障能力方案和人员转型方向,为5G正式商用提供了云化解决方案. 相似文献