面向无线NoC平台的拓扑与映射联合设计

Co-Design of Topology and Mapping for Wireless NoC Platform

传统NoC映射算法基于拓扑是确定的,无法为具体应用动态选择最优拓扑。无线NoC具有互联简单、低功耗、低延时、多播和动态带宽分配等突出优点。利用灵活的网络接入特性,提出面向无线NoC平台的拓扑与映射联合设计算法,采用改进的能耗模型,结合实时复杂系统特有的注入率、迭代边界等约束,以最小化延时和功耗为目标,同时对拓扑和映射进行优化。通过对无线通信系统——MIMO-OFDM收发端进行建模与仿真,证明该算法较之传统映射算法有明显的性能提升。

Conventional NoC mapping is based on fixed topologies and lacks the capability to choose the best fit topology dynamically for a specific application. Wireless NoC, which features simple VLSI implementation, lower latency and power consumption, provides the capability of broadcasting and dynamic bandwidth allocation. A topology and mapping co-design algorithm was proposed based on flexible network access technique. In the co design, an improved energy model was used in combination with speci^ic constraints o[ real-time complex system, such as injection rate, iteration bound, and etc. , to optimize latency and power consumption simultaneously. As an example, modeling and simulation of MIMO-OFDM transmitter/receiver were made to evaluate its performance. Experimental results showed that the new algorithm achieved remarkable performance enhancement, compared with traditional mapping algorithm.