Research on Cooperation of Multiple Agent Based on Contract-Net Protocol

Classical Contract-Net protocol among the multi-Agent bidding can realize the cooperation of open heterogeneous environment. But MAS (Multiple Agent System) is a typical complex system. MAS´s open, distributed and dynamic characteristics make the MAS environment filled with a lot of indeterminate factors, lead to surge in network traffic and negotiation deadlock. To solve these problems, this paper introduces the trust level domain and reputation mechanism to establish trust and reputation of the Contract-Net model. The model based on the history of cooperation experience in multi-Agent can effectively reduce network traffic, improve the efficiency and cooperation real-time of MAS.