Novel Layer-2 transmission strategies for 5G systems

5G 系统的新型第 2 层传输策略

• 批准号: 490796-2015
• 负责人: Szczecinski, Leszek
• 金额: $ 1.82万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=586616
• 关键词: Novel; Layer; transmission; strategies; 5G

In this project, one of the major issues related to the interaction between Layer 1 and Layer 2 of communication systems will be addressed. In particular, new strategies relating hybrid ARQ (HARQ) and adaptive modulation and coding (AMC) will be designed and analyzed. The supporting company, InterDigital, wants to remedy the major weakness of these two fundamental mechanisms of modern communication systems which is caused by a lack of exchange of information regarding the state of the channel and the state of the decoder. While AMC is meant to adjust the transmission parameters to the time-varying channel, HARQ is a "safety net" which deals with residual errors and does not take advantage of the CSI acquired during the retransmissions. Having practically no parameters to adjust, HARQ is very robust but helps very little to improve the throughput. Therefore, while AMC and HARQ have significantly contributed to the success of modern wireless communication systems, in their current form they are not ready to meet 5G systems requirements of lower latency (< 1ms), high reliability (99.999%) and particularly, the improved spectral efficiency. Thus, to address this need of Interdigital, new transmission strategies exploiting the results of previous theoretical studied will be proposed for practical codes and modulations. These new strategies will target transmission scenarios similar to those used in 4G and others that are expected for 5G systems. Exploiting the ideas of i) variable-length (or variable-bandwidth) transmission ii) multi-packet transmission and iii) adaptation based on the decoder state information accumulated throughout the HARQ cycle, transmission strategies where AMC and HARQ exploit jointly the CSI and rich signaling feedback to improve the throughput of the HARQ-based transmissions will be proposed and analyzed.

在这个项目中，主要问题之一涉及到第一层和第二层通信的交互 系统将得到解决。特别是与混合 ARQ (HARQ) 和自适应调制相关的新策略 编码（AMC）将被设计和分析。 支持公司 InterDigital 希望弥补这两个基础设施的主要弱点 现代通信系统的机制是由于缺乏信息交换而造成的 关于通道的状态和解码器的状态。虽然AMC的目的是调整变速箱 HARQ 是一个“安全网”，它处理残余错误，并且不影响时变信道的参数。 利用重传期间获取的 CSI。几乎没有需要调整的参数， HARQ 非常稳健，但对提高吞吐量的帮助甚微。因此，虽然AMC和HARQ有 为现代无线通信系统的成功做出了重大贡献，就目前的形式而言，它们 尚未准备好满足 5G 系统低延迟（< 1ms）、高可靠性（99.999%）和 特别是频谱效率的提高。 因此，为了满足 Interdigital 的这种需求，新的传输策略利用了以前的结果 理论研究将针对实际的编码和调制提出。这些新战略将针对 传输场景类似于 4G 中使用的传输场景以及 5G 系统预期的其他传输场景。利用 i) 可变长度（或可变带宽）传输 ii) 多包传输 iii) 适配的想法 基于在整个 HARQ 周期中积累的解码器状态信息，传输策略其中 AMC和HARQ共同利用CSI和丰富的信令反馈来提高吞吐量 基于 HARQ 的传输将被提出并分析。