摘要： 在面向特定应用的片上系统中，不同模块之间的通信量和延迟需求差异很大，均等位宽的链路不能充分利用带宽资源。为此，提出一种非均匀的带宽分配方案，根据流量特征和竞争状况设定各链路的数据宽度，采用异构的互联结构合理分配连线资源并优化吞吐量。实验结果表明，在均匀流量模式下，非均匀位宽的异构网络和同构架构的吞吐量相近，而连线资源节省16%。在热点流量模式下，异构网络能够有效缓解局部拥塞状况，提高网络吞吐量。

关键词: 片上网络, 异构互联结构, 转发概率, 端口竞争, 资源分配方法, 网络吞吐量

Abstract: In application-specific systems on chip, traffic load between different modules is imbalanced and the delay requirements vary largely, thus bandwidth cannot be fully used in uniform links. This paper presents a non-uniform bandwidth allocation approach, which assigns different width of data wires to each link according to traffic patterns and contention probability. The proposed method employs a heterogeneous architecture to allocate wire resources and optimize throughput. Experimental results demonstrate that under uniform traffic pattern, the optimized heterogeneous network achieves 16% wire savings with similar throughput compared with a regular Network-on-Chip(NoC). Under hotspot traffic pattern, it effectively alleviates local congestion and improves system throughput.

Key words: Network-on-Chip(NoC), heterogeneous interconnection structure, forwarding probability, port contention, resource allocation approach, network throughput

中图分类号: 

• TP393