TicTac - A Multi-Agent Framework for Real-Time Coordination of Temporal Plans: Application to Multi-Activity Recognition in Situation Analysis


  1. Allouche, M.K.
  2. Daigle, C.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN)
C2 activities are almost always distributed over the environment where operations take place. Dealing with distribution involves not only centralization and decentralization issues, but also real-time problems and, more generally, temporal problems. In the C2 environments, system components (including humans and support systems) are intended to: observe changes occurring in the environment – which is a pure temporal matter; make decisions regarding the observed changes, which very often are real-time; and finally, act by executing a plan usually structured in the form of a course of actions. During plan execution, it is not unusual to encounter further situations requiring planning or changing decisions. Plan execution is hence a highly dynamic activity. In this study, a new agent-based framework – TicTac – is proposed to meet most temporal and distribution needs for the development of C2 applications. TicTac agents have a BDI (Beliefs – Desires – Intentions) architecture where temporal plans play a major role. The whole system is designed to facilitate the temporal coordination of plans by multiple agents. Coordination mechanisms based on dependence, competition and help relationships are introduced. TicTac was applied to the distributed recognition of activities by means of temporal scenarios, a key component of the situation analysis process.

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Report Number
DRDC-VALCARTIER-TR-2003-325 — Technical Report
Date of publication
01 Sep 2006
Number of Pages

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