Terminal relaying for future wireless networks

未来无线网络的终端中继

• 批准号: RGPIN-2014-06194
• 负责人: Gohary, Ramy
• 金额: $ 1.82万
• 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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=652078
• 关键词: Terminal; relaying; future; wireless; networks

Since their inception, cellular systems have assumed a leading role in the wireless communications industry which lies at the forefront of industrial, social and economical progress of our society. Cellular systems have undergone categorical evolution from analogue high-power first generation (1G) systems all the way to current fourth generation (4G) systems, which have been envisioned to provide ubiquitous network coverage and reliable transfer of high data rates. The technological foundation of 4G systems is provided in the Long Term Evolution Advanced (LTE-A) standards. One of the key elements supported by these standards is the utilization of intermediate wireless communication-assisting nodes, known as relays. Under ideal conditions it has been prospected that the deployment of relays will enhance network coverage and enable wireless terminals to operate at unprecedented data rates. Despite the great expectations, practical field tests indicate that slight deviations from the LTE-A ideal conditions result in significant loss in achievable rates and service coverage. **The goal of the research directions outlined in this proposal is to mitigate the pitfalls encountered in the practical field tests of current LTE-A based cellular systems. In LTE-A the relaying nodes are assumed to be static, their locations are known and their number is fixed. These assumptions limit the scope of relay usability, and to circumvent them, we will consider cellular systems in which idle terminals act as relays to assist active and other relaying terminals. In such systems the number of relays scales with the number of wireless terminals, thereby offering a significantly higher number of design degrees of freedom, but, at the same time presenting several serious challenges including the mobility of the relaying terminals and the random manner in which they access the network. **The focus of the proposed research directions is to explore and exploit the potential advantages offered by terminal relaying schemes and to address the challenges that impede their deployment in future wireless networks. We will proceed along four distinct axes. *1- Generalization and unification of currently available relaying mechanisms to enable smooth adaptation to the time-varying conditions of wireless channels.*2- Developing efficient signalling and detection techniques for terminal relaying systems with multiple transmit and receive antennas in the absence of perfect information about the underlying wireless channels.*3- Developing distributed design techniques that enable wireless systems with terminal relays to achieve high data rates and ubiquitous coverage at low computational and operational costs.*4- Developing techniques for designing multiple communication aspects of the wireless network concurrently, thereby enabling efficient utilization of the radio resources available for communication. **From a technical perspective, the successful completion of the proposed research plan is expected to provide a foundation for terminal relaying for beyond 4G cellular networks. From a national perspective, this proposal counts among the ambitious efforts to maintain Canada's international leading role as a key player in the vital industry of telecommunications.

自成立以来，蜂窝系统在无线通信行业中扮演了领导角色，这是我们社会工业，社会和经济进步的最前沿。蜂窝系统已经从模拟高功率第一代（1G）系统到当前的第四代（4G）系统进行了分类演变，这些系统已设想提供无处不在的网络覆盖范围和可靠的高数据速率传输。长期进化（LTE-A）标准提供了4G系统的技术基础。这些标准支持的关键要素之一是使用中间无线通信辅助节点（称为继电器）的利用。在理想的条件下，已经提出了接力线的部署将增强网络覆盖范围，并使无线终端能够以前所未有的数据速率运行。尽管有很高的期望，但实际的现场测试表明，与LTE-A理想条件的略有偏差导致可实现的速度和服务覆盖率显着损失。 **该提案中概述的研究方向的目的是减轻当前基于LTE-A的蜂窝系统的实际现场测试中遇到的陷阱。在LTE-A中，中继节点被认为是静态的，它们的位置是已知的，它们的数量是固定的。这些假设限制了继电器可用性的范围，为了绕过它们，我们将考虑闲置终端作为继电器的细胞系统，以协助主动和其他继电器终端。在这样的系统中，无线终端数量的继电器尺度数量，从而提供了更高的设计自由度，但同时提出了一些严重的挑战，包括继电器终端的移动性以及它们访问网络的随机方式。 **拟议的研究指示的重点是探索和利用终端中继方案提供的潜在优势，并应对阻碍其在未来无线网络中部署的挑战。我们将沿着四个不同的轴进行。 *1- - 当前可用的中继机制的概括和统一，以使无线通道的时间变化条件平稳适应。 *4-开发用于设计无线网络的多个通信方面的技术同时开发技术，从而有效利用可用于通信的无线电资源。 **从技术角度来看，预计拟议的研究计划的成功完成将为超越4G蜂窝网络的终末继电器提供基础。从国家的角度来看，该提案是为了维持加拿大在电信至关重要行业中保持国际领导角色的雄心勃勃的努力。