The Effects of Agent Synchronization in Asynchronous Search Algorithms

Authors:
Ionel Muscalagiu;Jose M. Vidal;Vladimir Cretu;Popa Horia Emil;Manuela Panoiu
Affiliations:
The "Politehnica" University of Timisoara, The Faculty of Engineering of Hunedoara, Revolutie, 5, Romania;University of South Carolina, Computer Science and Engineering, Columbia SC 29208, USA;The "Politehnica" University of Timisoara, Computers Science and Engineering Department, Timisoara, V. Parvan 2, Romania;The University of the West, The Faculty of Mathematics and Informatics, Timisoara, V. Parvan 4, Romania;The "Politehnica" University of Timisoara, The Faculty of Engineering of Hunedoara, Revolutie, 5, Romania
Venue:
KES-AMSTA '07 Proceedings of the 1st KES International Symposium on Agent and Multi-Agent Systems: Technologies and Applications
Year:
2007

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Abstract

The asynchronous searching techniques are characterized by the fact that each agent instantiates its variables in a concurrent way. Then, it sends the values of its variables to other agents directly connected to it by using messages. These asynchronous techniques have different behaviors in case of delays in sending messages. This article depicts the opportunity for synchronizing agents' execution in case of asynchronous techniques. It investigates and compares the behaviors of several asynchronous techniques in two cases: agents process the received messages asynchronously (the real situation from practice) and the synchronous case, when a synchronization of the agents' execution is done i.e. the agents perform a computing cycle in which they process a message from a message queue. After that, the synchronization is done by waiting for the other agents to finalize the processing of their messages. The experiments show that the synchronization of the agents' execution leads to lower costs in searching for solution. A solution for synchronizing the agents' execution is proposed for the analyzed asynchronous techniques.