Abstract: With the development of deep submicron technology，Network on Chip（NOC） has already become a hot topic.The sharp increase of transistors per unit area takes a challenge to the reliability of NOC.When the node or link fault occurs，how to achieve fault-tolerant and improve reliability have already become the main point of NOC design.By the introduction of NOC fault-tolerant，using current mesh topology and dimension-ordered routing algorithm，this paper proposes a new fault-tolerant routing in mesh based on priority（PR），then does performance comparison with OPNET.

摘要： 随着深亚微米技术的发展，片上网络（Network on Chip，NOC）已成为芯片设计的热点。单位面积晶体管的急剧增多，给NOC可靠性带来了挑战。当节点或链路出现故障时，如何实现容错，提高系统可靠性成为NOC设计的重点。在对NOC容错技术进行简要介绍的基础上，利用现有mesh拓扑结构和维序路由算法，提出一种全新的基于优先级的mesh容错路由算法（fault-tolerant routing in mesh based on priority，PR算法），并采用OPNET仿真平台对算法进行仿真和性能对比。