片上网络因其高集成度、强扩展性、低功耗等优点，广泛用于片上通信。文章设计并实现了一种高可靠性双层片上网络电路，通过两层片上网络的冗余设计，一层片上网络用于正常数据传输，另一层用于超时重传，并对事件包的一些关键路由控制信息（如微片类型编码信息、目的路由器节点信息、NoC编号等）采用三模冗余的方法提高抗干扰能力，对所携带的地址信息、数据信息采用奇偶检验的方式来保证数据传输的正确性。通过仿真验证了该高可靠性双层片上网络电路功能的正确性且具有良好的容错性能。

Network-on-Chip (NoC) has been widely adopted for on-chip communication due to its advantages of high integration, strong scalability, and low power consumption. This paper designs and implements a highly reliable dual-layer Network-on-Chip circuit. A redundant architecture is adopted via two NoC layers: one layer is used for normal data transmission, while the other layer is dedicated to timeout retransmission. To enhance anti-interference capability, triple modular redundancy (TMR) is applied to key routing control information of event packets, including flit type coding, destination router node information, and NoC ID. Meanwhile, parity check is used for the carried address and data information to ensure the correctness of data transmission. Simulation results verify that the proposed highly reliable dual-layer NoC circuit achieves correct functional behavior and excellent fault-tolerant performance.