In Grid systems, nontrivial qualities of service have to be provided to users by the resource providers. However, resource management in a decentralized infrastructure is a complex task as it has to cope with different policies and objectives of the different parties: providers and consumers/users. Agreement-based resource management is considered to solve many of these problems as the conflicts between the users and resource providers can be reconciled in a negotiation process. Such negotiation processes must be automated with no or minimal human interaction, considering the potential scale of Grid systems and the amount of necessary transactions. Therefore, strategic negotiation models and strategic negotiation strategies play important roles. In this paper, negotiation strategies considering time and opportunity functions for Grid scheduling are proposed and examined. The simulation results demonstrate that the negotiation strategies are suitable and effective for Grid environments.
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