摘要
国际标准化组织3GPP已明确5G移动通信系统增强移动宽带(eMBB)、超可靠低延迟通信(uRLLC)和大规模机器类型通信(mMTC)三大应用场景。其中uRLLC业务是一种以超低时延、超高可靠性传输数据的业务,eMBB业务则对数据传输速率和吞吐量有明确要求。在系统资源有限的情况下,uRLLC业务和eMBB业务复用时如何保障各自业务的服务质量(QoS)已成为5G移动通信系统多业务场景系统资源分配的核心问题之一。对传统资源预留算法进行对比分析,针对多类型业务场景创新性地提出一种突发业务与随机业务并存的多占比动态资源预留与抢占机制,在保障uRLLC多种业务的超低时延和超高可靠要求的基础上,尽可能提升eMBB业务的吞吐率。经随机网络理论分析,优化设定uRLLC资源动态预留门限和资源抢占门限。仿真分析表明,所提方法在保障uRLLC多种业务的QoS基础上,有效提高了eMBB业务的吞吐量并最高可降低350 ms业务时延。
The International Standardization Organization(ISO)3GPP(the 3rd generation partnership project)has clarified three major application scenarios of eMBB,uRLLC and mMTC of 5G mobile communication system.Among them,the uRLLC service is a data transmission one with ultra-low delay and ultra-high reliability,and the eMBB service has specific requirements on data transmission rate and throughput.In the case of limited system resources,how to ensure the QoS of uRLLC and eMBB services has become one of the core issues of system resource allocation in the multi-service scenarios of 5G mobile communication system.The traditional resource reservation algorithms are contrasted and analyzed.On this basis,a dynamic multi-proportion resource reservation and preemption mechanism,in which emergent business and random business coexist,is innovatively proposed for multi-type business scenarios.On the basis of guaranteeing the requirements of ultra-low delay and ultra-high reliability of various uRLLC services,the throughput rate of eMBB services is improved as much as possible.The uRLLC resource dynamic reservation threshold and resource preemption threshold are optimized and set up according to the theoretical analysis of random network.The simulation analysis shows that the proposed method can effectively improve the throughput of eMBB service and reduce the service delay up to 350 ms on the basis of guaranteeing the QoS of various uRLLC services.
作者
么欣桐
陈健
黎军
YAO Xintong;CHEN Jian;LI Jun(Nanjing University of Posts and Telecommunications,Nanjing 210000,China;National Key Laboratory of Science and Technology on Space Microwave,China Academy of Space Technology(Xi’an),Xi’an 710000,China)
出处
《现代电子技术》
2022年第17期1-6,共6页
Modern Electronics Technique
基金
国家自然科学基金资助项目(62001319)。
关键词
资源预留
5G移动通信
时延
可靠性
随机网络演算
吞吐量
资源抢占
resource reservation
5G mobile communication
delay
reliability
stochastic network calculus
throughput
resource preemption
