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An Agent Framework for Effective Data Transfer

ECUMICT 2004 Gent, 1-2 April 2004. An Agent Framework for Effective Data Transfer. Stijn Bernaer Patrick De Causmaecker Joris Maervoet Greet Vanden Berghe. Framework for Effective Data Transfer. .

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An Agent Framework for Effective Data Transfer

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  1. ECUMICT 2004 Gent, 1-2 April 2004 An Agent Framework for Effective Data Transfer Stijn Bernaer Patrick De Causmaecker Joris Maervoet Greet Vanden Berghe

  2. Framework for Effective Data Transfer  • FrEDT is a generic agent organisation that manages client-server communication in a wireless environment • Runs on mobile devices with limited capacity • Based on 3 case studies • Still in development

  3. Disciplines  Agent architecture Wireless technology FrEDT Agent Platforms Platforms Programming Platforms Operating Systems

  4. Wireless communication technology 2G • 2.5G: 2G extensions for higher bitrates • Move from phone-oriented to data-oriented networks • Move from circuit-switched to packet-switched data • Average rates - GSM: 9.6 kbps - HSCSD: 28.8 kbps - GPRS: 40 kbps - UMTS: 384 kbps  2.5G 3G

  5. Agents • An agent is an encapsulated computer system, situated in some environment, and capable of flexible autonomous action in that environment in order to meet its design objectives (Jennings) • Agent interaction is inevitable to achieve individual objectives and to manage inter-dependencies (Jennings) 

  6. Agents • A multi-agent system (MAS) is an organisation of several agents that act and interact • The agents in a MAS perform particular roles and obey particular norms and regulations • Agents are re-active, autonomous, pro-active, continuous and persistent, social, learning, mobile 

  7. Agent Platforms AgentLight µFIPA-OS JADE-LEAP Grasshopper Programming Platforms Personal Java Java 2 Micro Edition (J2ME) Operating Systems Symbian OS Palm OS Windows CE (Pocket PC) Platforms for mobile devices 

  8. Case 1 – Transfer of geographical data • Central geographical database • Mobile employees create Update Reports (UR) • Employees need to transfer these UR’s • Wireless synchronisation process between local and central Update Report DataBase (URDB) • Employees need the most recent Update Reports on regions that will be explored in the near future (pro-active) • Agents regulate the data traffic 

  9. Case 2 – Supporting people with non-congenital brain injuries • People who have problems with coordinating and organising their daily life • Complete database on the supervisor’s computer and a subset of the data on the smartphone/PDA of the patient • Day’s schedule, addresses, instructions, itineraries, shopping lists • Optionally: mobile device for supervisor • Agents act as assistants 

  10. Case 3 – Transfer of medical reports and analyses • Mobile employees visit companies for risk analysis, ergonomic analysis and medical inspection • Employees use a procedure handbook and a program to manage analysis records on their notebook • This book has to be updated regularly and changed records need to be exchanged with a central databank • Agents are connection-aware and run in background 

  11. Motivation FrEDT • Case studies: • Client-server synchronisation mechanism • Transactions have different levels of urgency • Congestion should be avoided • Priority-based decision-making system • Negotiation about data transactions with certain priority 

  12. Why agents? • Component-based environment • To assist the end user • Asynchronity = delay independence • Autonomy, continuity • Adaptivity, proactivity • Negotiation 

  13. FrEDT: extensions • Connection awareness and reasoning about the connection (costs?) • Detachebility: the actual transfer does not need to be ACL (Agent Communication Language) • Fault-tolerance and security 

  14. Agent organisation • RETSINA architecture: interface-, task and database agents • Framework developed in JADE (Java Agent DEvelopment Framework) with LEAP (Lightweight Extensible Agent PLatform) extensions • J2SE • Personal Java • J2ME: MIDP/CLDC 

  15. Conclusion • FrEDT is suited for effective datatransfer in different situations • FrEDT joins several disciplines: agents, mobile devices and wireless communication technology • Further research: • Fault-tolerance and security • Application to the cases 

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