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Lecture 4 – Bond Agents

Lecture 4 – Bond Agents. What is a software agent? Mobility The Bond Agent Model. What is a software agent. It depends whom you ask: Someone from the distributed objects community: “ a software agent is an active mobile object”.

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Lecture 4 – Bond Agents

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  1. Lecture 4 – Bond Agents • What is a software agent? • Mobility • The Bond Agent Model.

  2. What is a software agent • It depends whom you ask: • Someone from the distributed objects community: “ a software agent is an active mobile object”. • An AI person: “A software agent is code capable to exhibit autonomous and intelligent behavior: • Infer new facts given a set of rules and facts. • Plan • Learn. • Us: a software agent is a mobile entity capable of intelligent behavior.

  3. Agent dimensions

  4. Agent-world interactions

  5. Mobility • Physical Mobility • Code Mobility

  6. Code mobility • Strong mobility: • anywere, • anytime. • Weak mobility: • only to some places • only at specific moments of time

  7. Objectives for the design of Bond • Assemble dynamically an agent from reusable components. • Create an open-ended environment for agents. • Support concurrency. • Allow changes in the agent behavior. • Support weak agent mobility.

  8. Bond components • Multi-plane state machines  different facets of activity: • User-interractions • Reasoning….. • Strategies: code executable when an agent enters a state. • Model of the word  shared memory allowing strategies in the same plane or in different planes to communicate.

  9. From agent description, to agent creation and to execution • Blueprint: an agent description language. • An agent factory interprets the agent description and generates an internal data structure that controls the run-time behavior of the agent.

  10. The structure of a strategy

  11. Agent surgery • Dynamic modification of an agent. • The agent factory uses a surgical blueprint to modify the agent, then generates a modified blueprint.

  12. Agent migration • Done at the request of a beneficiary who may supply a migration blueprint. • 12 step process desribed in the text at page 511-512.

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