基于共享射频互连的片上网络通信资源分配及布局的优化技术研究

With the fast development of semiconductor integrated circuits (ICs) ,future System on Chips (SoCs) will integrate hundreds even thousands of Intellectual Property (IP) cores to implement ever-growing functionalities, and the communication subsystem will replace the operation units to be a new bottleneck for performance improvement. In this trend, the performance requirements of NoC infrastructures in future technology nodes cannot be met by relying only on material innovation with traditional scaling. The continuing demand for low power and high speed interconnects with technology scaling necessitates looking beyond the conventional planar metal/dielectric-based interconnect infrastructures. Among different possible alternatives, the Radio Frequency interconnect based Network-on-Chip (RFNoC) is envisioned as a revolutionary methodology, capable of bringing significant performance gains for multi-core SoCs. However, Due to the limited resource on chip and diversity in application demands, how to utilize the available RF bandwidth effectively is one of the urgent problems to be solved for RFNoCs. There is no complete and systematic solution in current researches. Aiming at this, this project proposed SRFNoC (Shared Radio-Frequency interconnect based Network-on-Chip) to support global sharing of RF bandwidth on-chip. This project will firstly design and implement the system model of SRFNoC, and then develop an efficient allocation strategy from the perspectives of RF channels assignment and routing. Finally, the optimization methodology for nodes distribution will be explored. SRFNoC is able to satisfy both real-time requirements and different communication pattern demands with high bandwidth utilization. This project will provide new ideas and techniques for the design of high performance embedded computing systems with enhanced energy-efficiency.

随着半导体集成电路的飞速发展，单芯片上的处理核心数量急剧增加，传统的基于电气互连的片上网络将成为大规模片上系统性能提升的瓶颈。基于射频互连的片上网络能够以接近光的速度实现低能耗的远距离数据传输，是极具潜力的有效解决方案之一，成为未来片上网络发展的重要趋势。但是，由于片上资源的有限性和应用需求的多样性，如何实现射频通信资源的合理分配和高效利用，成为了射频片上网络研究迫切需要解决的关键问题。针对该问题，本项目创新性地提出了射频通信资源的全局共享和实时按需分配，设计和实现基于共享射频互连的片上网络系统模型，提出动态与静态相结合的通信资源分配策略和无死锁的自适应路由机制，对片上资源节点的布局进行联合优化设计，高效率利用有限的片上射频通信资源，满足不同特征应用的实时通信需求。本项目的成果将为构建高性能互连网络提供新思路，为新型数据计算系统设计提供一定的理论和技术支撑。

基于射频互连的片上网络能够以接近光的速度实现低能耗的远距离数据传输的特性，使其成为未来片上网络发展的重要趋势。但是，由于片上资源的有限性和应用需求的多样性，如何实现射频通信资源的合理分配和高效利用，成为了射频片上网络研究迫切需要解决的关键问题。针对该问题，本项目创新性地提出了基于共享射频互联的片上网络，实现射频通信资源的全局共享和实时按需分配。项目通过系统级建模方法，设计和实现基于共享射频互连的片上网络系统模型，在此基础上研究分为设计和执行两个阶段的，动态与静态相结合的通信资源分配策略，以及具有一定自适应性的无死锁动态路由机制，高效率利用有限的片上射频通信资源，能够满足不同特征应用的实时通信需求。