Low-Latency Relaying for Future Wireless Networks

未来无线网络的低延迟中继

• 批准号: RGPIN-2020-06309
• 负责人: Gohary, Ramy
• 金额: $ 2.4万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=717745
• 关键词: Low; Latency; Relaying; Future; Wireless

Future wireless communication systems are expected to support the reliable transfer of ultra high data rates exceeding tens of Gigabits per second with low latency of less than one millisecond. Meeting these requirements simultaneously comprises a major challenge that form the focal point of many research groups around the globe. Among the most efficient and cost-effective techniques to enable the goals of future wireless networks to be achieved is the deployment of intermediate communication-assisting nodes known as wireless relays. Relays can be categorized based on their relaying technique. These techniques include amplify-and-forward (AF), decode-and-forward (DF) and compress-and-forward (CF). Relays can be also categorized based on their operational modes, e.g., half-duplex or full-duplex, and/or their underlying communication protocols, e.g., one-way or two-way. To make effective use of relays, their configuration must take into consideration the communication scenario. For instance, when the transmitter-relay channel is significantly stronger than the relay-receiver channel, the DF relaying strategy is optimal. However, when the transmitter-relay channel does not satisfy this condition, DF relaying may be superseded by other relaying techniques. In a complementary fashion, full-duplex and two-way relays are generally more effective than their respective half-duplex and one-way relays, yet they invoke higher computational complexities and implementation challenges. The performance advantages that relaying nodes can offer to a network depend primarily on the network topology, the propagation environment and the operational signal-to-noise ratios. The focus in this research program is to explore the enhancement and utility of relaying techniques to meet the stringent constraints imposed by future wireless delay and security sensitive applications, e.g., autonomous vehicles and Internet-of-Things (IoT). This research program will consider the following directions: Direction I: Studying the efficacy of AF, DF and CF relaying techniques under conventional wireless channel conditions but with practical delay constraints. Direction II: Exploring the utility of relaying techniques, e.g., AF, DF and CF, and operational modes, full and half duplex, when the wireless channel exhibits temporal and spatial correlation. Both one-way and two-way relay networks will be considered. Direction III: Exploring optimal relaying in fast vehicular communications wherein the channel is unknown to the receiver and optimal relaying under stringent delay constraints has yet to be developed. These directions will contribute important innovative elements to the global effort to reduce latency of wireless networks while enhancing their reliability and throughput. These directions will also serve as a platform for training highly qualified personnel who are ready to assume leadership roles in the wireless communications arena.

预计未来的无线通信系统将支持超过每秒数十亿千兆的超高数据速率的可靠传输，低潜伏期低于一毫秒。满足这些要求同时构成了一个重大挑战，构成了全球许多研究小组的焦点。 在实现未来无线网络的目标的最有效，最具成本效益的技术之一是部署了中​​间通信辅助节点，称为无线继电器。可以根据其继电器技术对继电器进行分类。这些技术包括放大和前向（AF），解码（DF）和压缩 - 前向（CF）。继电器也可以根据其操作模式进行分类，例如半双链或全双工，以及/或它们的基础通信协议，例如单向或双向。为了有效利用继电器，它们的配置必须考虑到通信方案。例如，当发射机 - 列层通道明显强于继电器接收器通道时，DF继电器策略是最佳的。但是，当发射器 - 列层通道无法满足这种情况时，DF继电器可能会被其他继电器技术取代。以互补的方式，全双工和双向继电器通常比各自的半双链和单向接力更有效，但它们引起了更高的计算复杂性和实施挑战。传递节点可以提供给网络的性能优势主要取决于网络拓扑，传播环境和操作信噪比。 该研究计划的重点是探索继电器技术的增强和实用性，以满足未来的无线延迟和安全敏感应用程序（例如自动驾驶汽车和自动驾驶汽车和iot Internet（IOT））所施加的严格约束。该研究计划将考虑以下方向： 方向I：研究常规无线通道条件下AF，DF和CF继电器技术的功效，但具有实际的延迟约束。 方向II：当无线通道表现出时间和空间相关时，探索继电器技术的实用性，例如AF，DF和CF以及操作模式，全和半双链。将考虑单向和双向继电器网络。 方向III：在快速车辆通信中探索最佳中继，其中尚未开发在接收器的频道未知的通道和在严格的延迟约束下的最佳继电器。 这些方向将为全球努力贡献重要的创新元素，以减少无线网络的延迟，同时增强其可靠性和吞吐量。这些方向还将成为培训准备在无线通信领域扮演领导角色的高素质人员的平台。