Abstract

Building efficient distributed coordination algorithms is critical for the large scale multiagent system design, and the communication network has been shown as a key factor to influence system performance even under the same coordination protocol. Although many distributed algorithm designs have been proved to be feasible to build their functions in the large scale multiagent systems as claimed, the performances may not be stable if the multiagent networks were organized with different complex network topologies. For example, if the network was recovered from the broken links or disfunction nodes, the network topology might have been shifted. Therefore, their influences on the overall multiagent system performance are unknown. In this paper, we have made an initial effort to find how a standard network recovery policy, MPLS algorithm, may change the network topology of the multiagent system in terms of network congestion. We have established that when the multiagent system is organized as different network topologies according to different complex network attributes, the network shifts in different ways. Those interesting discoveries are helpful to predict how complex network attributes influence on system performance and in turn are useful for new algorithm designs that make a good use of those attributes.

Highlights

  • In state of the art of artificial intelligence research, scalable multiagent system applications in complex environments have been popular in domains of military [1], crisis management [2], and business [3]

  • When the system gets bigger, Musolesi et al have found that the system presents the characteristics of complex networks [4], for example, small world effect discovered by Travers and Milgram [5] and scale free phenomenon discovered by Barabasi and Albert [6]

  • The congestions can significantly change the network topology and system performance. Their effects are different on different complex networks

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Summary

Introduction

In state of the art of artificial intelligence research, scalable multiagent system applications in complex environments have been popular in domains of military [1], crisis management [2], and business [3] In those systems, to efficiently coordinate and share information, agents are required to communicate via flexible wireless media, such as mobile ad hoc networks. When the number of congested links and nodes is highly increased, the network topologies may have been changed It is especially the case when the network is organized as a scale free network or a small world network. Since scale free and small world networks are the most important attributes in a large multiagent system, from our previous research experience, their changes may significantly affect the system performances

Related Work
Modeling the Complex Networks
MPLS-Based Recovery Mechanisms
Network Robustness after MPLS Recovery
Network Shifts on Recovery from Different Topologies
Findings
Conclusions and Future Work
Full Text
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