Congestion Control in Intelligent Networks for Real Time Performance (2008)
Ake Arvidsson, Stefan Pettersson, Lars Angelin
Current developments in technologies and markets stress the importance of exible and robust performance optimisation and congestion control. In intelligent networks, congestion control has...
Visualizing Endpoint Security Technologies using Attack Trees (2008)
Software vulnerabilities in programs and malware deployments have been increasing almost every year since we started measuring them. Information about how to program securely, how malware shall be...
This report is the result of a master thesis at the Department of InformationTechnology at Uppsala University. This master thesis has been performed at Scania CV AB, Södertälje, during 2008.The...
This report is the result of a master thesis at the Department of InformationTechnology at Uppsala University. This master thesis has been performed at Scania CV AB, Södertälje, during 2008.The...
Visualizing Endpoint Security Technologies using Attack Trees (2008)
Software vulnerabilities in programs and malware deployments have been increasing almost every year since we started measuring them. Information about how to program securely, how malware shall be...
Hybrid Systems in Process Control (2007)
Bengt Lennartson, Michael Tittus, Bo Egardt, Stefan Pettersson
Modeling and control of hybrid systems, with particular emphasis on process control applications, are considered in this article. Based on a number of observations on typical mixed discrete and...
Wireless indoor multimedia communication has a bright future. The success of cellular telephony and the explosive development of Internet services will have a great impact on indoor communications. A...
A Converse Theorem for Exponential Stability using Piecewise Quadratic Lyapunov Functions (2007)
Stefan Pettersson, Bengt Lennartson
We present sufficient and necessary conditions for exponential stability of autonomous nonlinear dynamical systems using piecewise quadratic Lyapunov functions. The necessary conditions are given as...
Bats and bat flowers in a West African rainforest community / (2005)
Thesis (doctoral)--Göteborg University, 2005.
In this thesis, we investigate several radio resourcemanagement (RRM) techniques and concepts in an indoorenvironment with a dense infrastructure. Future wireless indoorcommunication networks will...
In this thesis, we investigate several radio resourcemanagement (RRM) techniques and concepts in an indoorenvironment with a dense infrastructure. Future wireless indoorcommunication networks will...
“Well-informed people know it is impossible to transmit the voice over wires and that were it possible to do so, the thing would be of no practical value” Editorial in the Boston Post, 1865. In...
Implementation and evaluation of a polynomial-based division algorithm (2003)
In comparison to other basic arithmetic operations, such as addition, subtraction and multiplication,division is far more complex and expensive. Many division algorithms, except for lookup tables,...
Implementation and evaluation of a polynomial-based division algorithm (2003)
In comparison to other basic arithmetic operations, such as addition, subtraction and multiplication,division is far more complex and expensive. Many division algorithms, except for lookup tables,...
Perspectives and results on the stability and stabilizability of hybrid systems (2000)
Raymond A. Decarlo, Michael S. Branicky, Stefan Pettersson, Bengt Lennartson
This paper introduces the concept of a hybrid system and some of the challenges associated with the stability of such systems, including the issues of guaranteeing stability of switched stable...
Analysis and design of hybrid systems /--Stefan Pettersson. (1999)
Thesis (Ph. D.)--Chalmers University of Technology, 1999.
Stefan Pettersson, Bengt Lennartson
: Exponential stability of hybrid systems using a Lyapunov approach is considered in this paper. The continuous part of the hybrid system is described by nonlinear differential equations that depend...
An LMI Approach for Stability Analysis of Nonlinear Systems (1997)
Stefan Pettersson, Bengt Lennartson
This paper presents a constructive method for showing stability of nonlinear systems consisting of state-dependent weighted linear systems. This kind of system representation is common in for...
Controller Design of Hybrid Systems (1997)
Stefan Pettersson, Bengt Lennartson
In this paper we present two strategies to design a hybrid controller for a system described by several nonlinear vector fields. Besides the overall goal to find a controller that stabilizes the...
An LMI Approach for Stability Analysis of Nonlinear Systems (1997)
Stefan Pettersson, Bengt Lennartson
In this paper we present a method to analyze stability for nonlinear systems consisting of weighted linear subsystems. A large class of nonlinear systems can be represented in this way, e.g. weighted...
Controller Design of Hybrid Systems (1997)
Stefan Pettersson, Bengt Lennartson
. In this paper we present two strategies to design a hybrid controller for a system described by several nonlinear vector fields. Besides the overall goal to find a controller that stabilizes the...
Exponential Stability Analysis of Nonlinear Systems using LMIs (1997)
Stefan Pettersson, Bengt Lennartson
This paper presents a constructive method for showing exponential stability of autonomous nonlinear systems consisting of state-dependent weighted linear systems. This kind of system representation...
Profit Optimal Congestion Control in Intelligent Networks (1997)
Arvidsson, Åke, Pettersson, Stefan, Angelin, Lars
Current developments in technologies and markets stress the importance of exible and robust performance optimisation and congestion control. In intelligent networks, conges- tion control has...
Network Oriented Load Control in Intelligent Networks (1997)
Pettersson, Stefan, Arvidsson, Åke
Heavy network load in the signaling system number 7 is an important source of customer dissatisfaction as congested networks result in deteriorated quality of service. With the introduction of a...
Stability and robustness for hybrid systems (1996)
Stefan Pettersson, Bengt Lennartson
Stability and robustness issues for hybrid systems are considered in this paper. General stability results that are extensions of classical Lyapunov theory have recently been formulated. However,...
Modelling, Analysis Synthesis of Hybrid Systems (1996)
Stefan Pettersson, Bengt Lennartson
This paper deals with modelling, analysis and synthesis of hybrid systems. The model presented is quite general in the sense that it can describe most of the phenomena that occur in hybrid systems....
LMI for Stability and Robustness of Hybrid Systems (1996)
Stefan Pettersson, Bengt Lennartson
This paper presents results for stability and robustness of hybrid systems consisting of nonlinear subsystems. Present stability results that are extensions of classical Lyapunov theory are...
LMI for Stability and Robustness of Hybrid Systems (1996)
Stefan Pettersson, Bengt Lennartson
This paper presents results for stability and robustness of hybrid systems consisting of nonlinear subsystems. Present stability results that are extensions of classical Lyapunov theory are...
Stability And Robustness For Hybrid Systems (1996)
Stefan Pettersson, Bengt Lennartson
Stability and robustness issues for hybrid systems are considered in this paper. Present stability results, that are extensions of classical Lyapunov theory, are not straightforward to apply in...
Some Results on Optimal Decisions in Network Oriented Load Control in Signaling Networks (1996)
Congestion control in the signaling system number 7 is a necessity to fulfil the requirements of a telecommunication network that satisfy customers’ requirements on quality of service. Heavy...
Congestion Control in Intelligent Networks for Real Time Performance and Profit Optimisation (1996)
Arvidsson, Åke, Pettersson, Stefan, Angelin, Lars
Current developments in technologies and markets stress the importance of exible and robust performance optimisation and congestion control. In intelligent networks, congestion control has...
A Decision Theoretic Approach to Congestion Control in Signalling Networks (1996)
Pettersson, Stefan, Arvidsson, Åke
Congestion control in the signaling system number 7 is a necessity to fulfil the requirements of a telecommunication network that satisfy customers’ requirements on quality of service. Heavy...
Time-Optimal Control and Disturbance Compensation for a Class of Hybrid Systems (1995)
Stefan Pettersson, Bengt Lennartson
In this paper the design of a time-optimal controller for a class of hybrid systems where the continuous part is modelled by integrator processes is outlined. The controller may be used for classical...
Hybrid Modelling focused on Hybrid Petri Nets (1995)
Stefan Pettersson, Bengt Lennartson
In the present paper, a general hybrid model is proposed, including vector-field switching and/or state jumps. We clearly separate the open-loop hybrid plant from the closed-loop hybrid system in...
Time-Optimal Control and Disturbance Compensation for a Class of Hybrid Systems (1995)
Stefan Pettersson, Bengt Lennartson
In this paper we will outline the design of a time-optimal controller for a class of hybrid systems where the continuous part is modelled by integrator processes. The controller may be used for...
Hybrid Modelling focused on Hybrid Petri Nets (1995)
Stefan Pettersson, Bengt Lennartson
In the present paper, a general hybrid model is proposed, including vector-field switching and/or state jumps. We clearly separate the open-loop hybrid plant from the closed-loop hybrid system in...
Economical Aspects of a Congestion Control Mechanism in a Signaling Network (1995)
Pettersson, Stefan, Arvidsson, Åke
Congestion control in signaling system 7 (SS7) is a necessity for fulfilling the requirements of a telecommunication network that provides customer satisfaction. Heavy network load is a source of...
A Profit Optimizing Strategy for Congestion Control in Signaling Networks (1995)
Pettersson, Stefan, Arvidsson, Åke
Congestion control in the signaling system number 7 (SS7) is a necessity to fulfil the requirements of a telecommunication network that satisfy customers’ requirements on quality of service. Heavy...
A Network Approach to Signalling Network Congestion Control (1995)
Angelin, Lars, Pettersson, Stefan, Arvidsson, Åke
Congestion control in Signaling System #7 faces new challenges as mobile communication systems and Intelligent Networks grow rapidly. New services change traffic patterns, add to signalling network...
Time-Optimal Control for a Class of Hybrid Systems
Stefan Pettersson, Bengt Lennartson
This paper presents an algorithm for the generation of a timeoptimal control law for a specific class of hybrid systems, namely integrator processes. The control law is generated directly from the...
Time-Optimal Control for a Class of Hybrid Systems
Stefan Pettersson, Bengt Lennartson
This report presents an algorithm for the generation of a timeoptimal control law for a specific class of hybrid systems, namely integrator processes. The control law is generated directly from the...