[论文解读] White Paper on Critical and Massive Machine Type Communication Towards 6G

Nurul Huda Mahmood, Stefan Böcker+29 more|arXiv (Cornell University)|Apr 29, 2020

Advanced Wireless Communication Technologies参考文献 43被引用 164

一句话总结

这篇白皮书综述推动6G MTC的驱动因素、需求和使能技术，提出一个整体架构、能源高效的设备以及新的服务等级，以满足2030年的需求。

ABSTRACT

The society as a whole, and many vertical sectors in particular, is becoming increasingly digitalized. Machine Type Communication (MTC), encompassing its massive and critical aspects, and ubiquitous wireless connectivity are among the main enablers of such digitization at large. The recently introduced 5G New Radio is natively designed to support both aspects of MTC to promote the digital transformation of the society. However, it is evident that some of the more demanding requirements cannot be fully supported by 5G networks. Alongside, further development of the society towards 2030 will give rise to new and more stringent requirements on wireless connectivity in general, and MTC in particular. Driven by the societal trends towards 2030, the next generation (6G) will be an agile and efficient convergent network serving a set of diverse service classes and a wide range of key performance indicators (KPI). This white paper explores the main drivers and requirements of an MTC-optimized 6G network, and discusses the following six key research questions: - Will the main KPIs of 5G continue to be the dominant KPIs in 6G; or will there emerge new key metrics? - How to deliver different E2E service mandates with different KPI requirements considering joint-optimization at the physical up to the application layer? - What are the key enablers towards designing ultra-low power receivers and highly efficient sleep modes? - How to tackle a disruptive rather than incremental joint design of a massively scalable waveform and medium access policy for global MTC connectivity? - How to support new service classes characterizing mission-critical and dependable MTC in 6G? - What are the potential enablers of long term, lightweight and flexible privacy and security schemes considering MTC device requirements?

研究动机与目标

• 识别推动MTC走向2030的社会与工业驱动因素。
• 定义6G MTC的KPI演变与多样化服务等级需求。
• 提出使能技术和端到端MTC优化的整体网络架构。
• 讨论能源高效的MTD设计、零能量概念和睡眠模式策略。
• 解决多RAT、互操作MTC的隐私、安全和标准挑战。

提出的方法

• 提出一个整体的MTC网络架构，支持跨异构网络和域的端到端QoS。
• 概述能源高效的设备设计，包括超低功耗接收机和环境背散射概念。
• 通过广覆盖、优化的物理层和自适应介质访问，讨论全球可扩展的MTC。
• 描述任务关键MTC的需求，以及非蜂窝、多样化连接如何满足可靠性要求。
• 解决隐私和安全方面的考虑，包括长期安全方案，以及智能合约和区块链概念的角色。
• 倡导开放标准和跨域互操作性，以实现无处不在的未接入MTC。

实验结果

研究问题

• RQ1 5G的主要KPI（可靠性-延迟-可扩展性）是否在6G中仍然占主导，还是能量效率与感知等指标将变得更重要？
• RQ2 如何通过跨学科的方法，从物理层到应用层的优化来实现多样化的端到端服务要求？
• RQ3 哪些使能技术将支持超低功耗接收机和睡眠模式以实现超低成本的MTC设备？
• RQ4 如何通过大规模可扩展的波形与介质访问的颠覆性联合设计高效支持MTC的全球连接？
• RQ5 通过多元化连接和非蜂窝解决方案，哪些使能因素将支持任务关键和可靠的MTC，以及如何有效管理隐私/信任？

主要发现

• 需要一个全面、端到端优化的MTC网络，能够处理多样化的6G服务等级和KPI需求。
• 能源效率，包括超低功耗设备和环境背散射，是可扩展的mMTC部署的核心。
• 全面网络架构应实现跨域编排、软件化，以及与前代互操作的开放性。
• 零能量与能源采集方法被视为未来MTC设备寿命的关键路径。
• 隐私与安全考虑必须随着异构MTC能力的发展而演变，包括潜在的区块链概念和轻量级信任机制。
• 非蜂窝且全球可扩展的连接解决方案（如无人机编队、NTN）被认为对6G MTC的覆盖很重要。