基于信号跳变时间可调整的容错路由器

Reliable Router Based on Signal Transition Time Adjustment

摘要:

设计了一种基于信号跳变时间可调整（STTA）的片上网路容错路由器.首先，这种路由器能够准确预测总线的串扰故障，并通过错开信号跳变的方法容忍总线的串扰故障.然后，为了容忍寄存器上的单事件翻转（SEU），路由器中所有的寄存器被替换成双内锁单元(DICE).结果表明：基于STTA的路由器仅需在普通路由器上增加46%的面积开销和70%的功耗开销，就能容忍总线上串扰导致的故障和寄存器上的SEU.与基于TS HC TMR和SCAC TMR方法的容错路由器相比，基于STTA的路由器至少减少了93%的面积和55%的功耗开销，有效地解决了容错路由器开销过大的问题.

Abstract:

In this paper, a selected transition time adjustment (STTA) based router is designed for the reliable network on chip. The router can predict crosstalk induced faults on interconnects accurately and tolerate these faults through staggering the signal transition time. Then a dual interlocked cell (DICE) is used to preserve all registers in the router from single event upset (SEU). The results show that the router can tolerate large crosstalk induced faults and SEU with only extra 46% area overhead and 70% power dissipation of a normal router. Compared with TS HC TMR and SCAC TMR based router, the router saves 93% area and 55% power overhead at least, which solves the huge overhead problem for reliable network on chip (NOC) routers effectively.