Adaptibility Patterns of Multi-Agent Organizations Oguz Dikenelli, R.Cenk Erdur Ege University Computer Engineering Department

The Concept of Organizational Adaptibility Organizational adaptibility can be defined as the capability of the organization to handle dynamic and unpredictible changes in the organization’s global knowledge To handle Organizational Adaptibility, Developers need to Understand this problem Define required agent interactions and responsibilities for a specific adaptibility requirement during the desing

A Common Terminology to Define Adaptibility Patterns- A High Level Architectural View of MAS

Ontology Perception Pattern (OPP) Intent - OPP defines how agent organization adapts itself when the structure of the global ontology changes or new ontology is added to the organizations at run-time Motivation In an adaptive environment, global ontologies may change at run time At any time new ontologies added to the organization

OPP-Continue Interaction Mechanism And Responsibilities

OPP-Continue (Responsibilities of Participating Agents) Agent Type Responsibilities Directory Facilitator Handle the request coming from the OA Search the agents that use the ontology of interest Inform OA about the availability/unavailability of the requested agents Ontology Agent Understand ontological changes Query DF for agents that support ontology of interest Inform the related agent(s) about the new ontology Package and transfer the new ontology to the related agent Agent Build a request for ontology transfer Handle the new ontology coming from the OA Localize the new Ontology

OPP-Continue (Concurrent Task Diagram of the Agent Role)

Society Merging Pattern (SMP) Intent – SMP defines how different organizations adapt themselfs to each other’s global knowledge at run-time Motivation – There can be hundreds of independent agent organizations providing similar services based on different ontologies. Conspiciously, each organizationmay gain additional benefits using the services of the similar organizations.

SMP-Continue (Extended High Level Architectural View)

SMP-Continue (Interaction Mechanism)

SMP-Continue (Responsibility of Participating Agents) META-DF Manage the meta ontology Search the societies that provide the requested capability Inform the related DFs about the entry of a new society DF Advertise the capability of the society to META-DF Request the adress of the OA from other DF Inform the address of own OA to the requested DFs Inform the OA about the new society OA Build a request for ontology transfer Package and transfer the own ontology Handle the coming ontology Localize the coming ontology

Current Status We have implemented the OPP by defining the required plans and inserting these plans in to a FIPA compliant agent framework OA transfers DAML based ontologies in the content of the FIPA ACL. Two different localize behaviors are implemented one for ontology to relational db mapping The other one for user interface creation

Conclusion In this paper, we introduce two patterns for organizational adaptibility Now, we are working to identify new adaptibilty requirements for pattern identifications and to extend the funtionality of agent framework for adaptibility support.