A fast algorithm for crosspoint assignment under crosstalk constraints with shielding effects

This paper presents a novel algorithm for crosspoint assignment (CPA) that takes into consideration crosstalk noise and shielding effects in deep sub-micron design. We introduce an alternative constraint which is imposed on a sensitive net-pair to detach one from the other or to put another insensitive net between them for shielding. We provide two algorithms: one is based on an ILP, which outputs an exact optimum solution. The other is a fast heuristics whose time complexity is O(n/sup 2/ log n), where n is the number of pins. In experiments, we tested these algorithms for industrial examples and demonstrated that our heuristics ran quickly and attained near optimum solutions.