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The architecture of the next generation telecommunications network infrastructure is based on two... more The architecture of the next generation telecommunications network infrastructure is based on two realities. The first reality is that the Internet is the connecting backbone network and transport of all telecommunications services carrying all different types of traffic in a unified manner. The second reality lies in the fact that wireless access is emerging as the most common access to the Internet whether in the form of fixed or mobile wireless access. Telecommunications network infrastructure that supports wireless access will prevail as wireless access will carry most of the Internet generated traffic compared to other popular forms of access today such as high speed digital subscriber lines and cable modems. It is worth mentioning that the Internet and access to the Internet will not only evolve around demand for access to telecommunications services in all forms but also access to computing services enabled by the Internet. The emerging convergence between telecommunications network infrastructure for wireless access and the Internet for computing services has helped the proliferation of new applications and services of rich content such as streaming video and social media for purposes other than traditional voice and data communications such as mobile advertising, online gaming, education, etc. This has created constant and growing demand on wireless telecommunications network infrastructure for high speed wireless access in the form of what known as wireless broadband. Radio frequency spectrum is the medium used for wireless access; therefore radio frequency spectrum resources are currently on a high demand and will continue in that direction. According to an estimate published by the International Telecommunication Union, there are about 1.2 billion mobile wireless Internet users in the world today which represents about 17% of the global population. In January 2012, 8.49% Internet hits, or page views, originate from handheld mobile wireless devices. The demand for wireless broadband services is growing which has placed tremendous pressure on radio frequency spectrum resources. These trends have posed technical and economic challenges as radio frequency spectrum regulations and management practices internationally and nationally influence the growth and evolution of the wireless telecommunications industry. These challenges pushed the radio frequency spectrum regulators and managers around the world especially within the developed countries to work hard to ensure more radio frequency spectrum resources are available to sustain the growth and meet the demands within the wireless telecommunications industry. However, there is a whole debate as how these challenges can be addressed. One approach is through the use of public policy in order to create reforms of the current regulatory and radio frequency spectrum management practices. This approach will likely be complex and need extensive international harmonization to ensure global interoperability. On the other side, another approach is to progressively relax restrictions on the use of new emerging technologies of radio frequency sharing which will eventually help increase the efficient utilization of radio frequency spectrum resources such as cognitive radio. Cognitive radio is perceived by many researchers and participants in the wireless telecommunications industry as the next generation wireless access network architecture and the future technology that will help meet the current and future demand for more radio frequency spectrum resources. As a new technology there are several technical, regulatory and economic challenges that need to be worked out. It is commonly considered that cognitive radio will have an impact on existing technologies used today in wireless communications and also on the current radio frequency spectrum regulations and management practices. As cognitive radio evolves, it has the potential to change many aspects in wireless communications in a similar way that the Internet did for using and sharing data networks. A closer study shows the potential of cognitive radio to offer a new paradigm shift within wireless communications in all forms as how to use radio frequency spectrum and within the wireless telecommunications industry as a whole. Cognitive radio holds a great promise to help the current practices of radio frequency spectrum management to gradually transform into more flexible, accommodative and responsive. This praxis focuses on the implications of cognitive radio on the regulatory process and management practices pertaining to access using the radio frequency spectrum. It is worth mentioning that there have been several wireless technologies in the past that have failed to live up to their initial promise for a variety of reasons many of which are not technical. A practical engineering research takes into consideration practical engineering solutions enabled by new technologies that would add economic value.…
The authors implemented a 3-2 route scheme and overlap allowance in the automatic generation of c... more The authors implemented a 3-2 route scheme and overlap allowance in the automatic generation of custom cells layout targeted at GaAs and CMOS technology which requires three or more metal layers. The goal of this system is to create a dense layout with minimum area as the first concern and to have better performance than hand drawing and standard cell
International Conference on Software Engineering, Oct 13, 1976
ABSTRACT
International Journal on Artificial Intelligence Tools, Jun 1, 1994
The domain specific automatic programming technique was applied to the design and implementation ... more The domain specific automatic programming technique was applied to the design and implementation of an automatic functional model generation system (AFMG) for effectively and efficiently creating simulation models of digital systems. The application domain knowledge, involved in a time-consuming and error-prone process for element modeling, was identified, organized, and incorporated into the AFMG as internal rules to guide several transformation processes for converting various forms of model specification, step by step, into desired functional models. Other design issues, such as incomplete specification handling, different signal representations, multiple-valued model generation, interaction of algorithm and data structure selection, …etc., were also carefully addressed and resolved during the design process of the AFMG system. Experimental results show that AFMG can significantly reduce the development time of creating functional models for digital logic simulation.
ABSTRACT Digital systems design and verification becomes more difficult as the size of the system... more ABSTRACT Digital systems design and verification becomes more difficult as the size of the system grows. To solve this problem, many CAD tools have been developed, including simulation. However, as systems increase in size and complexity, simulating the system becomes very costly, both in time and space. For most cases that use simulation, only a subset of the total possible simulation patterns is used for design verification. The paper describes a simulation tool which applies effective methodologies such as: error compression and sampling, for reducing simulation time and resources. These methods satisfy confidence level expectations for design verification using either reduced design errors or reduced test sets
... Hardware acceleration of concurrent fault and design error simulation. Authors: Saghir Ahmed ... more ... Hardware acceleration of concurrent fault and design error simulation. Authors: Saghir Ahmed Shaikh, Supervisors: Stephen A. Szygenda, Publication: ... An abstract is not available. top of page AUTHORS. Saghir Ahmed Shaikh No contact information provided yet. ...
Security for Wireless Sensor Networks using Identity-Based Cryptography, 2012
Design Automation Conference, Jun 25, 1973
ABSTRACT
IEEE Transactions on Biomedical Engineering, May 1, 1976
1993 IEEE International Symposium on Circuits and Systems, Dec 30, 2002
m3D is the third attempt to produce a dynamically configurable, multilayer router which not only ... more m3D is the third attempt to produce a dynamically configurable, multilayer router which not only can handle traditional two-level routing problems, but also multilayer routing and three-dimensional routing. The basic maze algorithm is extended so that all points connected to the net under consideration are used to propagate the cost wave. This results in the next shortest link between all the subnetwork components to be found, and a dynamically determined minimum spanning tree to be constructed for each network. Several levels of modifications are conducted on the preexisting routes, along with a rip-up and reroute strategy to handle the more dense problems. Test results indicate that m3D can complete problems as well as, or better than, many of the well-known routers, and that it has the capability of handling a wide range of routing problems. The router is part of an integrated automatic cell layout generation system.<<ETX>>
Parallel and Distributed Processing Techniques and Applications, 1996
ABSTRACT Simulation is essential for the design and verification of digital systems and simulatio... more ABSTRACT Simulation is essential for the design and verification of digital systems and simulation tools are widely used to analyze the behavior of digital circuits. This paper describes an integrated hardware array specialized for digital logic, fault, and design error simulation. Hardware simulation, using a high performance special purpose architecture such as the integrated hardware array, is still a viable approach for large and complicated circuits. In order to reduce the cost and to achieve high performance, the integrated hardware array adopts a direct mapping parallelism which directly maps the circuit topology onto the hardware array. Experimental results are given
ABSTRACT This paper provides efficient design verification methodologies based on concurrent simu... more ABSTRACT This paper provides efficient design verification methodologies based on concurrent simulation technique which is implemented in the interactive simulation automation system (ISAS). Concurrent simulation is not a new technique, however, the ISAS exploits many parallelisms during the simulation procedure and applies it to three different types of simulation: concurrent (C&lowbar;sim), distributed concurrent (Dc&lowbar;sim), and concurrent-concurrent (CON2FERS). ISAS automates the simulation procedure with a graphic user interface and handles not only fault models, but also design error models. It generates fault and design error coverage metrics for the user. This paper provides a description of three types of concurrent simulators with performance results
ABSTRACT Digital logic and fault simulation of large VLSI circuits is one of the most compute-int... more ABSTRACT Digital logic and fault simulation of large VLSI circuits is one of the most compute-intensive tasks in digital analysis. This paper describes a special purpose time driven array processor for digital logic simulation. The new architecture uses a massively parallel processing element (PE) array in a SIMD architecture. Compiled event-driven technology and nominal transport delay timing analysis are used. A circuit to be simulated is levelized according to the delay time order at the preprocessing stage and the levelized circuit is mapped into a massively parallel PE array. Circuit comparisons show that the speedup of the new architecture is up to 8 times faster than the MARS accelerator and it can be higher for increased circuit size; while the hardware cost remains low
Pediatric Research, Apr 1, 1974
The architecture of the next generation telecommunications network infrastructure is based on two... more The architecture of the next generation telecommunications network infrastructure is based on two realities. The first reality is that the Internet is the connecting backbone network and transport of all telecommunications services carrying all different types of traffic in a unified manner. The second reality lies in the fact that wireless access is emerging as the most common access to the Internet whether in the form of fixed or mobile wireless access. Telecommunications network infrastructure that supports wireless access will prevail as wireless access will carry most of the Internet generated traffic compared to other popular forms of access today such as high speed digital subscriber lines and cable modems. It is worth mentioning that the Internet and access to the Internet will not only evolve around demand for access to telecommunications services in all forms but also access to computing services enabled by the Internet. The emerging convergence between telecommunications network infrastructure for wireless access and the Internet for computing services has helped the proliferation of new applications and services of rich content such as streaming video and social media for purposes other than traditional voice and data communications such as mobile advertising, online gaming, education, etc. This has created constant and growing demand on wireless telecommunications network infrastructure for high speed wireless access in the form of what known as wireless broadband. Radio frequency spectrum is the medium used for wireless access; therefore radio frequency spectrum resources are currently on a high demand and will continue in that direction. According to an estimate published by the International Telecommunication Union, there are about 1.2 billion mobile wireless Internet users in the world today which represents about 17% of the global population. In January 2012, 8.49% Internet hits, or page views, originate from handheld mobile wireless devices. The demand for wireless broadband services is growing which has placed tremendous pressure on radio frequency spectrum resources. These trends have posed technical and economic challenges as radio frequency spectrum regulations and management practices internationally and nationally influence the growth and evolution of the wireless telecommunications industry. These challenges pushed the radio frequency spectrum regulators and managers around the world especially within the developed countries to work hard to ensure more radio frequency spectrum resources are available to sustain the growth and meet the demands within the wireless telecommunications industry. However, there is a whole debate as how these challenges can be addressed. One approach is through the use of public policy in order to create reforms of the current regulatory and radio frequency spectrum management practices. This approach will likely be complex and need extensive international harmonization to ensure global interoperability. On the other side, another approach is to progressively relax restrictions on the use of new emerging technologies of radio frequency sharing which will eventually help increase the efficient utilization of radio frequency spectrum resources such as cognitive radio. Cognitive radio is perceived by many researchers and participants in the wireless telecommunications industry as the next generation wireless access network architecture and the future technology that will help meet the current and future demand for more radio frequency spectrum resources. As a new technology there are several technical, regulatory and economic challenges that need to be worked out. It is commonly considered that cognitive radio will have an impact on existing technologies used today in wireless communications and also on the current radio frequency spectrum regulations and management practices. As cognitive radio evolves, it has the potential to change many aspects in wireless communications in a similar way that the Internet did for using and sharing data networks. A closer study shows the potential of cognitive radio to offer a new paradigm shift within wireless communications in all forms as how to use radio frequency spectrum and within the wireless telecommunications industry as a whole. Cognitive radio holds a great promise to help the current practices of radio frequency spectrum management to gradually transform into more flexible, accommodative and responsive. This praxis focuses on the implications of cognitive radio on the regulatory process and management practices pertaining to access using the radio frequency spectrum. It is worth mentioning that there have been several wireless technologies in the past that have failed to live up to their initial promise for a variety of reasons many of which are not technical. A practical engineering research takes into consideration practical engineering solutions enabled by new technologies that would add economic value.…
The authors implemented a 3-2 route scheme and overlap allowance in the automatic generation of c... more The authors implemented a 3-2 route scheme and overlap allowance in the automatic generation of custom cells layout targeted at GaAs and CMOS technology which requires three or more metal layers. The goal of this system is to create a dense layout with minimum area as the first concern and to have better performance than hand drawing and standard cell
International Conference on Software Engineering, Oct 13, 1976
ABSTRACT
International Journal on Artificial Intelligence Tools, Jun 1, 1994
The domain specific automatic programming technique was applied to the design and implementation ... more The domain specific automatic programming technique was applied to the design and implementation of an automatic functional model generation system (AFMG) for effectively and efficiently creating simulation models of digital systems. The application domain knowledge, involved in a time-consuming and error-prone process for element modeling, was identified, organized, and incorporated into the AFMG as internal rules to guide several transformation processes for converting various forms of model specification, step by step, into desired functional models. Other design issues, such as incomplete specification handling, different signal representations, multiple-valued model generation, interaction of algorithm and data structure selection, …etc., were also carefully addressed and resolved during the design process of the AFMG system. Experimental results show that AFMG can significantly reduce the development time of creating functional models for digital logic simulation.
ABSTRACT Digital systems design and verification becomes more difficult as the size of the system... more ABSTRACT Digital systems design and verification becomes more difficult as the size of the system grows. To solve this problem, many CAD tools have been developed, including simulation. However, as systems increase in size and complexity, simulating the system becomes very costly, both in time and space. For most cases that use simulation, only a subset of the total possible simulation patterns is used for design verification. The paper describes a simulation tool which applies effective methodologies such as: error compression and sampling, for reducing simulation time and resources. These methods satisfy confidence level expectations for design verification using either reduced design errors or reduced test sets
... Hardware acceleration of concurrent fault and design error simulation. Authors: Saghir Ahmed ... more ... Hardware acceleration of concurrent fault and design error simulation. Authors: Saghir Ahmed Shaikh, Supervisors: Stephen A. Szygenda, Publication: ... An abstract is not available. top of page AUTHORS. Saghir Ahmed Shaikh No contact information provided yet. ...
Security for Wireless Sensor Networks using Identity-Based Cryptography, 2012
Design Automation Conference, Jun 25, 1973
ABSTRACT
IEEE Transactions on Biomedical Engineering, May 1, 1976
1993 IEEE International Symposium on Circuits and Systems, Dec 30, 2002
m3D is the third attempt to produce a dynamically configurable, multilayer router which not only ... more m3D is the third attempt to produce a dynamically configurable, multilayer router which not only can handle traditional two-level routing problems, but also multilayer routing and three-dimensional routing. The basic maze algorithm is extended so that all points connected to the net under consideration are used to propagate the cost wave. This results in the next shortest link between all the subnetwork components to be found, and a dynamically determined minimum spanning tree to be constructed for each network. Several levels of modifications are conducted on the preexisting routes, along with a rip-up and reroute strategy to handle the more dense problems. Test results indicate that m3D can complete problems as well as, or better than, many of the well-known routers, and that it has the capability of handling a wide range of routing problems. The router is part of an integrated automatic cell layout generation system.<<ETX>>
Parallel and Distributed Processing Techniques and Applications, 1996
ABSTRACT Simulation is essential for the design and verification of digital systems and simulatio... more ABSTRACT Simulation is essential for the design and verification of digital systems and simulation tools are widely used to analyze the behavior of digital circuits. This paper describes an integrated hardware array specialized for digital logic, fault, and design error simulation. Hardware simulation, using a high performance special purpose architecture such as the integrated hardware array, is still a viable approach for large and complicated circuits. In order to reduce the cost and to achieve high performance, the integrated hardware array adopts a direct mapping parallelism which directly maps the circuit topology onto the hardware array. Experimental results are given
ABSTRACT This paper provides efficient design verification methodologies based on concurrent simu... more ABSTRACT This paper provides efficient design verification methodologies based on concurrent simulation technique which is implemented in the interactive simulation automation system (ISAS). Concurrent simulation is not a new technique, however, the ISAS exploits many parallelisms during the simulation procedure and applies it to three different types of simulation: concurrent (C&lowbar;sim), distributed concurrent (Dc&lowbar;sim), and concurrent-concurrent (CON2FERS). ISAS automates the simulation procedure with a graphic user interface and handles not only fault models, but also design error models. It generates fault and design error coverage metrics for the user. This paper provides a description of three types of concurrent simulators with performance results
ABSTRACT Digital logic and fault simulation of large VLSI circuits is one of the most compute-int... more ABSTRACT Digital logic and fault simulation of large VLSI circuits is one of the most compute-intensive tasks in digital analysis. This paper describes a special purpose time driven array processor for digital logic simulation. The new architecture uses a massively parallel processing element (PE) array in a SIMD architecture. Compiled event-driven technology and nominal transport delay timing analysis are used. A circuit to be simulated is levelized according to the delay time order at the preprocessing stage and the levelized circuit is mapped into a massively parallel PE array. Circuit comparisons show that the speedup of the new architecture is up to 8 times faster than the MARS accelerator and it can be higher for increased circuit size; while the hardware cost remains low
Pediatric Research, Apr 1, 1974