An extension of contract net protocol with real time constraints
Li Qiaoyun, Jiandong Li, Dai Dawei, Kang Lishan · Wuhan University Journal of Natural Sciences · 1996
The contract net protocol has developed to specify problem solving communication for nodes in a distributed problem solving. Task distribution is affected by a negotiation process, a discussion carried on between nodes with tasks to be executed and nodes that may be able to execute those tasks. In contract net protocol, once negotiation successes, the task execution is assumed to success. However, in real world, even though a task is awarded to successfully bidding nodes, it may be delayed. Such delay may badly propagate in whole system. Here, we introduce real-time constraints into contract net protocol to manage task execution for avoiding the task's delay, or even though being delayed, the failure cannot propagate to whole system. In this paper, we first present a real-time contract net protocol which is an extension of contract net protocol with real-time constraints for distributed computing. Our proposition extends the basic negotiation protocol to negotiation and controlling execution of task. The controlling process is based on task deadline time we also present an extension of the internode language of contract net protocol specification with real-time constraints