A Collaborative Service Model for Multi-Agent System

A notion of grade field is presented and introduced into contract net to eliminate the disadvantages of the contract net model so as to solve the problems due to the collaboration among different service agents, thus minimizing the region to search collaborative service agents. Meanwhile, the time consumption for service agents in collaboration is considered to balance their loads, avoid the blindness of selection of anyone of them and increase the throughput of the multiple service agent system. Based on the fusion of grade field and the time consumption, a new model named grade-field-and-time-based contract net model or GT-CNM is developed, which will suppress occurrence of either overload or underload to a certain extent. Simulation results verified the effectiveness of this model.