Abstract: High-radix router with low latency and high bandwidth plays an important role in constructing large-scale interconnection networks. However，limited by the continuous increasingly design complexity and the slowdown and stagnation of Moores law and Dennard scaling, it will become more and more difficult to expand a higher number of ports on a single routing chip. Chiplet integrates multiple dies in a high-level package to form a large chip with specific functions, so as to solve the problems of scale, cost and period in chip design. According to the idea of Chiplet integration technology and using existing routing chips, this paper proposes a 128-port high-radix router.The internal structure of this high-radix router is a a two-level fat-tree network composed of multiple switch dies. The actual RTL-level code simulation test shows that,  compared with the single-chip high-radix router, the designed high-radix router achieves better performance while expanding more ports.

Key words: high-radix router, Chiplet, interconnect network