Mobile IPv6 is a network-layer mobility protocol for the IPv6 Internet. The protocol includes several security mechanisms, such as the return-routability tests for the care-of addresses. This paper explains the threat model and design principles that motivated the Mobile IPv6 security features. While many of the ideas have become parts of the standard toolkit for designing Internet mobility pro...

A new algorithm for automated standard cell placement of asynchronous Micropipeline designs has been developed. The resulting placement solutions are targeted to meet all bundled-data timing constraints while providing efficient chip areas. The placement algorithm utilizes the simulated evolution iterative heuristic. The cost function is a weighted sum of an area factor and a timing factor. Res...

Preplaced modules may be flipped to improve performance and/or routability. We show that several versions of the module flipping problem are NP-hard. We propose algorithms to obtain module orientations that minimize the total wire length for module matrix and standard cell models. Additionally, we propose a heuristic to flip modules so as to minimize the length of the longest signal path. The r...

This paper presents a new switch-box (SB) and connection-box (CB) design combination for segmented interconnection, which is the bottom level interconnection in our hierarchical FPGA. SB & CB design candidates are first pre-screened by analysis based on maze routing algorithm. Then the structure with the best routability is chosen from candidates by benchmark experiment evaluation. The new stru...

| This article describes a topological routing path search algorithm embedded in our autorouter for printed circuit boards. The algorithm searches for a topological path that is guaranteed to be transformable into a physical wire satisfying design rules. We propose a method for incrementally verifying design rules during topological path search in a graph based on constrained Delaunay triangula...

Switch-Module Routability Yao-Wen Chang1, D. F. Wong2, and C. K. Wong3y 1Department of Computer and Information Science, National Chiao Tung University, Hsinchu, Taiwan, ROC 2Department of Computer Sciences, University of Texas at Austin, Austin, Texas 78712, USA 3Department of Computer Science, Chinese University of Hong Kong, Hong Kong Abstract Switch modules are the most important component ...

The integration of mobile IPv6 heterogeneous networks enhances networking performance; however, it also breaks mobile node’s anonymity and location privacy. In this paper, we propose an anonymous and location privacy preserving (ALPP) scheme that consists of two complementary subschemes: anonymous home binding update and anonymous return routability. In addition, anonymous mutual authentication...

Yao-Wen Chang1, D. F. Wong1, and C. K. Wong2y 1Department of Computer Sciences, University of Texas at Austin, Austin, Texas 78712 2Department of Computer Science, Chinese University of Hong Kong, Hong Kong Abstract Switch modules are the most important component of the routing resources in FPGA's and FPIC's. The quality of switch modules greatly a ects FPGA/FPIC routing solutions. The switch-m...

Modern field-programmable gate array (FPGA) devices contain complex clock architectures on top of configurable logics. Unlike application specific integrated circuits (ASICs), the physical structure of clock networks in an FPGA is pre-manufactured and cannot be adjusted to different applications. Furthermore, clock routing resources are typically limited for high-utilization designs. Consequent...