Self-Coupling Random-Access Communications

自耦合随机接入通信

• 批准号: RGPIN-2020-06823
• 负责人: Trukhachev, Dmitry
• 金额: $ 2.84万
• 依托单位: Dalhousie University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=751665
• 关键词: Self; Coupling; Random; Access; Communications

A large share of upcoming wireless communication applications is dedicated to the Internet of Things (IoT) and Machine-to-Machine (M2M) communications. Objects of the future, such as parts of smart homes, smart vehicles, robots and automata, will exchange information without any need for human intervention and will perform various tasks jointly. Such M2M and IoT communication scenarios anticipate high density of communicating devices that send short messages on demand, without coordination and reservation of time and bandwidth resources. Energy saving, high reliability, and low latency are on the priority list of features demanded by many such applications including remote control and virtual reality. Current techniques for multiple-access communications, a scenario when a number of transmitters share communication media simultaneously, are not suitable for a massive number of devices accessing the channel without coordination, on demand, at random times, in presence of channel impairments and mobility. The goal of the proposed program and future research is to develop a data communication format for massive asynchronous random-access beyond 5G systems providing a base for M2M and IoT communications infrastructure. In terms of data packets, transmitter, and receiver design, the system needs to satisfy low-latency high-reliability requirements, operate in mmWave channel with mobility and energy constraints, be able to efficiently utilize massive multiple antenna receivers, and be optimal in terms of complexity and throughput. The research methodology includes use of spatial graph coupling techniques, where each message is represented as a graph that connects data bits and time/frequency communication resources. The graphs couple at the receiver into a graph chain that allows for efficient data extraction. To enable random access, we propose to use a self-coupling structure where each packet is represented by a mini coupled chain. When received, even at random times, the chains of individual packets couple into a single graph chain at the receiver. Message-passing algorithms for data decoding and interference cancellation can provide a way to approach optimal performance in the sense of the achievable throughput. The format enables for inclusion of iterative packet acquisition and channel equalization. The expected contribution to the field is a communication format that can be implemented in a multitude of devices and potentially standardized. We target a systematic design based on theoretic principles of optimality, supported by rigorous analysis framework and novel breakthrough techniques of spatial coupling, compressed sensing, machine learning, and channel tracking. The developed technology is expected to lay a pathway to future wireless device connectivity and have a significant impact on the Canadian economy as 5G, IoT, and M2M will serve as a vehicle for the future development of business in the information technology sector.

在即将到来的无线通信应用中，有很大一部分专门用于物联网(IoT)和机器对机器(M2M)通信。未来的对象，如智能家居、智能车辆、机器人和自动机的零部件，将在不需要任何人工干预的情况下交换信息，并将共同执行各种任务。这样的M2M和IoT通信场景预计会有高密度的通信设备按需发送短消息，而无需协调和预留时间和带宽资源。节能、高可靠性和低延迟是包括远程控制和虚拟现实在内的许多此类应用所要求的优先功能清单。当前用于多址通信的技术，即多个发射机同时共享通信媒体的场景，不适用于在存在信道损伤和移动性的情况下，在没有协调、按需、在随机时间访问信道的大量设备。该计划和未来研究的目标是为超过5G的大规模异步随机接入系统开发一种数据通信格式，为M2M和物联网通信基础设施提供基础。在数据包、发射机和接收机的设计方面，系统需要满足低延迟、高可靠性的要求，工作在移动性和能量受限的毫米波信道上，能够高效地利用大量的多天线接收机，并在复杂度和吞吐量方面达到最优。研究方法包括使用空间图耦合技术，其中每个消息被表示为连接数据比特和时间/频率通信资源的图。这些图在接收器处耦合成图链，从而允许高效的数据提取。为了实现随机访问，我们建议使用自耦合结构，其中每个分组由一个微型耦合链表示。在接收时，甚至在随机时间，各个数据包链在接收器处耦合成单个图形链。用于数据解码和干扰消除的消息传递算法可以提供一种在可实现的吞吐量意义上接近最佳性能的方法。该格式允许包括迭代分组捕获和信道均衡。对该领域的预期贡献是一种可以在多种设备中实施并可能标准化的通信格式。我们的目标是基于最优化理论原则的系统设计，由严格的分析框架和空间耦合、压缩感知、机器学习和通道跟踪等新的突破性技术支持。开发的技术预计将为未来的无线设备连接铺平道路，并对加拿大经济产生重大影响，因为5G、物联网和M2M将成为信息技术领域未来业务发展的载体。