Af indhold: Part 1, Motivation for and Introduction to Mobile Agents. Part 2, Mobile Agents - Concepts, Functions, and possible Problems. Part 3, The Kalong Mobility Model - Specification and Implementation. Part 4, The Tracy Mobile Agent Toolkit

The book focuses on mobile agents, which are computer programs that can autonomously migrate between network sites. This text introduces the concepts and principles of mobile agents, provides an overview of mobile agent technology, and focuses on applications in networking and distributed computing.

Recent years have witnessed the appearance of new paradigms for designing distributed applications where the application components can be relocated - namically across the hosts of the network. This form of code mobility lays the foundation for a new generation of technologies, architectures, models, and - plications in which the location at which the code is executed comes under the control of the designer, rather than simply being a con?guration accident. Among the various ?avors of mobile code, the mobile agent paradigm has become particularly popular. Mobile agents are programs able to determine - tonomously their own migration to a di?erent host, and still retain their code and state (or at least a portion thereof). Thus, distributed computations do not necessarily unfold as a sequence of requests and replies between clients and - mote servers, rather they encompass one or more visits of one or more mobile agents to the nodes involved. Mobile code and mobile agents hold the potential to shape the next gene- tion of technologies and models for distributed computation. The ?rst steps of this process are already evident today: Web applets provide a case for the least sophisticated form of mobile code, Java-based distributed middleware makes - creasing use of mobile code, and the ?rst commercial applications using mobile agents are starting to appear.

Welcome to the proceedings of the 6th IEEE International Conference on Mobile Agents. MA 2002 took place in Barcelona, Spain and was co-located with the 4th International Workshop on Mobile Agents for Telecommunications Applications. Both events were held at the Universitat Pompeu Fabra, October 22–25, 2002. Mobile agents may be de?ned as programs that, with varying degree of - tonomy, can move between hosts across a network. Mobile agents combine the notions of mobile code, mobile computation, and mobile state. Capabilities of mobile agents include: – Supporting unrealiable networks and disconnected operation – Counteracting low-bandwidth, high-latency communication links – Deploying newbehaviour (through mobile code) and recon?guring systems on-the-?y – Distributing processing load across systems – Improving survivability in the face of network and system failure. Given the above capabilities, mobile agents (while they may not be referred to as such) are nowbecoming accepted as a fundamental architectural construct for the design and development of complex adaptive systems that need to operate in highly dynamic environments. Mobile agents also support applications in several domains such as ubiquitous computing, grid computing, remote sensing, data mining, system management, and agile computing.

The aim of the MATA workshops series is to provide a unique opportunity for researchers from the IT, Internet, and telecommunications domain, as well as related software and application developers and service providers to discuss the advances in agent technologies and their applications in next generation mobile Internet and telecommunications. Since 1999 in Canada, MATA workshops have contributed to the creation of a research community around mobile agents and their use in telecommunication applications. The 2003 workshop focused on recent developments in agent technologies and particularly the use of agent technologies within the ?elds of network - nagement, dynamic service provisioning and management, nomadic and mobile computing, context aware services and environments, active and programmable networks,policybasedservicesandmanagement,adhocnetworking,peer-to-peer computing, ambient intelligence, Wireless Java, software de?ned radio, adaptive mobile end systems, virtual home environments, smart home, smart cars and navigation, e-learning, m-commerce, and other related 3Gb areas. October 2003 Eric HORLAIT VI Preface Scienti?c Program Committee T. Araragi, NTT, Japan P. Bellavista, Bologna, Italy F. Bellifemine, TILab, Italy R. Boutaba, Univ. of Waterloo, Canada P. Brezillon, LIP6, France B. Burg, HP Labs, USA J. Celestino Junior, ́ FUC, Brazil J. Delgado, UPF Barcelona, Spain B. Dillenseger, France Teleco, France W. Enkelmann, Chrysler AG, Germany B. Falchuk, Telecordia, USA R. Glitho, Ericsson, Canada Y. Gourhant, FT R&D, France S. Guan, NUS, Singapore S. . Honiden, NII, Japan E. Horlait, LIP6, France R. Impey, NRC, Canada Y. Ismailov, Ericsson, Sweden A. Karmouch, Univ. of Ottawa, Canada K. Kim, Konkuk University, Korea L.

Content Description #Includes bibliographical references and index.

This book constitutes the refereed proceedings of the Third International Workshop on Mobile Agents for Telecommunication Applications, MATA 2001, held in Montreal, Canada in August 2001. The 26 revised full papers presented were carefully reviewed and selected for inclusion in the volume. Among the topics addressed are network management, mobile applications, nomadic computing, feature interaction, Internet applications, QoS managment, policy-based management, interactive multimedia, tele-learning, and computer telephony integration.

In this monograph, Joachim Baumann provides in-depth coverage of essential research issues; namely, mechanisms for locating and terminating mobile agents and for orphan detection in a mobile agent system. The reader will gain insights into the design and implementation of three control mechanisms for use in mobile agent systems: the energy concept, the path concept, and the shadow concept. The author examines these mechanisms and offers a solid argument as to why they would be better choices over existing mechanisms with respect to message complexity, migration delay, and availability. All in all, this book is an outstanding contribution to advancing the science of mobile agents and it will help the community better understand how to tame mobile agents.

This book constitues the refereed proceedings of the Second International Symposium on Agent Systems and Applications and the Fourth International Symposium on Mobile Agents, ASA/MA 2000 held in ZÃ1⁄4rich, Switzerland in September 2000. The 20 revised full papers presented were carefully reviewed and selected from 107 submissions. The papers are organized in topical sections on migration, security issues, systems and applications, mobile agent applications, applications of multi-agent systems, communication and mobility control, cooperation and interaction.

Research in the telecommunications ?eld suggests that future network infrastructures will be composed of sensors, wireless devices, personal digital assistants, networked appliances and numerous types of services. This brings up key issues such as unfamiliar users and service interfaces, discovering services that match user’s needs, ?nding and tracking people and resources, establishing useful contacts and appropriate associations between resources and users, and managing a large number of dynamic network entities all of which must be performed in an automated and proactive manner with a certain degree of autonomy and mobility. These are the main characteristics exhibited by mobile software agent behavior, making the technology more suitable for future telecommu- cation applications and services. It also reveals the tremendous potential for the mobile agent paradigm. The potential complexity of mobile agent operation requires that mechanisms exist on several levels to coordinate its activities. For this purpose research and development on various forms of mobile agents continues to grow in a staggering fashion. Age- based applications and services such as network management, e-commerce, information gathering on the Internet, mobile communications, active networking, and most recently ad hoc communications are becoming increasingly popular and continue to contribute to the development and to the success of mobile agent technology. In addition it is well established that mobile agents is an ideal sister technology for mobile ad hoc networks where users, applications, services, devices and networks are mobile and dynamically con?gurable.