A Resilient Routing Algorithm with Formal Reliability Analysis for Partially Connected 3D-NoCs

: Salamat R, Khayambashi M, Ebrahimi M, Bagherzadeh N

Publisher: IEEE COMPUTER SOC

: 2016

: IEEE Transactions on Computers

: IEEE TRANSACTIONS ON COMPUTERS

: IEEE T COMPUT

: 65

: 11

: 3265

: 3279

: 15

: 0018-9340

: 1557-9956

DOI: https://doi.org/10.1109/TC.2016.2532871

3D ICs can take advantage of a scalable communication platform, commonly referred to as the Networks-on-Chip (NoC). In the basic form of 3D-NoC, all routers are vertically connected. Partially connected 3D-NoC has emerged because of physical limitations of using vertical links. Routing is of great importance in such partially connected architectures. A high-performance, fault-tolerant and adaptive routing strategy with respect to the communication flow among the cores is crucial while freedom from livelock and deadlock has to be guaranteed. In this paper we introduce a new routing algorithm for partially connected 3D-NoCs. The routing algorithm is adaptive and tolerates the faults on vertical links as compared to the predesigned routing algorithms. Our results show a 40 - 50% improvement in the fraction of intact inter-level communications when the fault tolerant algorithm is used. This routing algorithm is lightweight and has only one virtual channel along the Y dimension.