Contract Net Protocol

About: Contract Net Protocol is a research topic. Over the lifetime, 606 publications have been published within this topic receiving 13729 citations.

Multi-Agent Based Cloud Service Composition using Contract Net Protocol for Information Retrieval Purpose

Abstract: Information retrieval (IR) systems are important key players for every Internet user and there are many Information Retrieving frameworks and algorithms, which are currently using or under development. As the technology trend is always changing and current industrial and business world is willing to emphasize on not only providing knowledge but also supporting service, cloud computing and Web Services (WSs) become popular. Cloud computing is internet based system development in which large scalable computing resources are provided as a service over the internet to users and has attracted more and more attention from industry and research community. WS plays important role in service oriented computing in World-Wide-Web and Cloud environment. Developing a Cloud Wide IRSystem using WSs can fill one blank of Cloud Environment. In this case, retrieving desired specific information from WSs on Cloud Environment cannot be completed by single WS. Hence, there should be a way to build an IRSystem based on a set of related WSs in order to fulfill users' requests and provide desired services. To compose WSs, Multi-Agent System (MAS) can give great help. Agent systems are self-contained software programs embodying domain knowledge and having ability to act as a specific degree of independence to carry out actions needed to accomplish desired goals. Therefore, this paper mainly focuses on building a WSs Based IR MAS framework and Agent Processing Algorithm, which will be running on a Private Cloud Environment. We propose Contract Net Protocol for IR Purpose in order to perform WSs Composition. The implementation and testing of this system utilizes the real datasets of clinics in the Yangon area.

A Novel Cooperation and Competition Strategy among Multi-Agent Crawlers

Abstract: Multi-Agent theory which is used for communication and collaboration among focused crawlers has been proved that it can improve the precision of returned result significantly. In this paper, we proposed a new organizational structure of multi-agent for focused crawlers, in which the agents were divided into three categories, namely F-Agent (Facilitator-Agent), As-Agent (Assistance-Agent) and C-Agent (Crawler-Agent). They worked on their own responsibilities and cooperated mutually to complete a common task of web crawling. In our proposed architecture of focused crawlers based on multi-agent system, we emphasized discussing the collaborative process among multiple agents. To control the cooperation among agents, we proposed a negotiation protocol based on the contract net protocol and achieved the collaboration model of focused crawlers based on multi-agent by JADE. At last, the comparative experiment results showed that our focused crawlers had higher precision and efficiency than other crawlers using the algorithms with breadth-first, best-first, etc.

A Contract Net Model Based on Agent Active Perception

Abstract: Introducing agent techniques into the process of system integration will solve the problem about flexible dynamic system integration. The contract net protocol (CNP) has been applied to the negotiation in multi-agent system. On the basis of the research on traditional CNP, by improving its ability to deal with dynamic environment, this paper presents a contract net model based on agent active perception (CNMAAP) to improve the efficiency of negotiation. With the introduction of a perception coefficient and a parameter for the degree of credibility to CNMAAP, the paper puts forward the tendering strategy for contract manager and the bidding strategy for contract tender, after which an analysis of the efficiency of CNMAAP is made. Finally, CNMAAP is applied to the agent-based system integration tool, and has been tested with the border and coast defense simulation system. The result demonstrates that, compared with traditional CNP, CNMAAP can effectively reduce the negotiation cost with assured quality.

Developing reliability model in contract net protocol

Abstract: Contract Net Protocol (CNP) is a task sharing/interaction protocol consisting of a collection of nodes called software agents purposely used for communication necessitated in a distributed multi agent environment. The conventional FIPA CNP allows the initiator agent to allocate task to contractor agents but does not allow the evaluation of reliability of contractors. In this paper we concentrate on the reliability of contractor agents that facilitates the initiator agent for awarding the task to optimal/best contractor. In this work we proposed a Reliability Model (RM) in the conventional CNP. Development of Reliability Model (RM) in conventional CNP will ensure the reliability of agents which is more decisive