• Title/Summary/Keyword: Mobile Agents

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SecureJMoblet : Secure Mobile Agent System based on Jini2.0 (SecureJMoblet : Jini2.0 기반의 안전한 이동에이전트 시스템)

  • Yu Yang-Woo;Moon Nam-Doo;Lee Myung-Joon
    • The KIPS Transactions:PartA
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    • v.11A no.6
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    • pp.439-450
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    • 2004
  • Mobile agents are autonomous and dynamic entities that can migrate among various nodes in the network. Java's Jini framework facilitates mobile agent system development, providing hey features for distributed network programming. However, due to the security weakness, Jinil.0 service has a fundamental limitation on developing mobile agent systems which support secure remote communications. In this paper, we describe a Jini2.0-based secure mobile agent system named SecureJMoblet. On the top of Jini2.0, the system provides basic functionalities of a mobile agent system such as creation, transfer and control. In addition, with the SeureJS developed for secure JavaSpace service, SecureJMoblet supports a secure object repository and a reliable communication among mobile agents.

A Fast Transmission of Mobile Agents Using Binomial Trees (바이노미얼 트리를 이용한 이동 에이전트의 빠른 전송)

  • Cho, Soo-Hyun;Kim, Young-Hak
    • The KIPS Transactions:PartA
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    • v.9A no.3
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    • pp.341-350
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    • 2002
  • As network environments have been improved and the use of internet has been increased, mobile agent technologies are widely used in the fields of information retrieval, network management, electronic commerce, and parallel/distributed processing. Recently, a lot of researchers have studied the concepts of parallel/distributed processing based on mobile agents. SPMD is the parallel processing method which transmits a program to all the computers participated in parallel environment, and performs a work with different data. Therefore, to transmit fast a program to all the computers is one of important factors to reduce total execution time. In this paper, we consider the parallel environment consisting of mobile agents system, and propose a new method which transmits fast a mobile agent code to all the computers using binomial trees in order to efficiently perform the SPMD parallel processing. The proposed method is compared with another ones through experimental evaluation on the IBM's Aglets, and gets greatly better performance. Also this paper deals with fault tolerances which can be occurred in transmitting a mobile agent using binomial trees.

A Fault-Tolerant Mobile Agent Framework and Replication Study for Internet Applications (인터넷 응용을 위한 고장 감내 이동 에이전트 프레임워크와 레플리케이션 연구)

  • Park, Kyeong-mo
    • The KIPS Transactions:PartA
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    • v.10A no.6
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    • pp.701-708
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    • 2003
  • This paper addresses the issue involved in dependability of distributed mobile agents in the Internet environment. We propose an architectural framework for the Internet applications making mobile agents into fault-tolerant. The replication of agents and data is of great importance to achieve fault tolerance in distributed systems over the Internet. This research focuses on the replication component for the proposed fault-tolerant mobile agent framework. We present and analyze the performance results obtained when doing simulation study on the effects of the degree of replication, the active and passive replication strategies, and the replication scale.

A Path Planning of Mobile Agents By Ant Colony Optimization (개미집단 최적화에 의한 이동 에이전트의 경로 계획)

  • Kang, Jin-Shig
    • Journal of the Korean Institute of Intelligent Systems
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    • v.18 no.1
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    • pp.7-13
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    • 2008
  • This paper suggests a Path-planning algorithm for mobile agents. While there are a lot of studies on the path-planning for mobile agents, mathematical modeling of complex environment which constrained by spatio-temporally is very difficult and it is impossible to obtain the optimal solutions. In this paper, an optimal path-planning algorithm based on the graphic technique is presented. The working environment is divided into two areas, the one is free movable area and the other is not permissible area in which there exist obstacles and spatio-temporally constrained, and an optimal solution is obtained by using a new algorithm which is based on the well known ACO algorithm.

Security of Service Location Protocol using MobileAgents (모바일 에이전트를 이용한 SLP 보안)

  • 황영덕;조인휘
    • Proceedings of the Korean Information Science Society Conference
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    • 2004.04a
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    • pp.352-354
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    • 2004
  • 현재의 사용자 컴퓨팅 환경은 점점 방대해지고 복잡해지고 있으며, 이동 중에 업무를 신속하게 처리해야하는 경우가 많아지면서, 이동 컴퓨팅환경에 대한 편리성과 신뢰성의 요구가 증가하고 있다. 사용자는 언제 어디서나 필요한 서비스를 제공받을 수 있어야 한다. 이 논문에서는 서비스와 자원탐색을 자동으로 해주는 SLP(Service Location Protocol), 필요한 코드와 데이터를 원격으로 보내 처리하는 모바일에이전트(Mobile Agents) 기술의 문제점을 해결하고 상호 연동하여 보완한다. 이 기술의 보편화를 저해하는 보안에 대한 문제점을 분석하여 이것을 해결할 하나의 모델을 제시함으로써 편리하고 안정적인 응용을 보이고자 한다.

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Design of an Advanced Architecture for Supplementary Service in H.323 Internet Protocol Telephony (H.323기반 인터넷 폰의 부가 서비스를 위한 향상된 구조 설계)

  • 민병준;채수익;이상백;박동선
    • Proceedings of the IEEK Conference
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    • 2000.11c
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    • pp.133-136
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    • 2000
  • In this paper, a new service architecture for IP Telephony, based on the ITU-T standard H.323[1], is proposed. This architecture uses mobile Agents and existing architectural concepts taken from Intelligent Network[IN]. This IP service architecture enables telecom services deployed through mobile service agents on a per user basis, which results in several advantages when compared to centralized service architecture. The paper demonstrates that the flexible and extensible architecture can accommodate a wide variety of future services.

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Efficient Replication Protocols for Mobile Agent Systems (이동 에이전트 시스템을 위한 효율적인 중복 프로토콜)

  • Ahn, Jin-Ho
    • Journal of KIISE:Computer Systems and Theory
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    • v.33 no.12
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    • pp.907-917
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    • 2006
  • In this paper, we propose a strategy to improve fault-tolerance and scalability of replicated services in mobile agent systems by applying an appropriate passive replication protocol for each replicated service according to whether the service is deterministic or non-deterministic. For this purpose, two passive replication protocols, PRPNS and PRPDS, are designed for non-deterministic and deterministic services respectively. They both allow visiting mobile agents to be forwarded to and execute their tasks on any node performing a service agent, not necessarily the primary agent. Especially, in the protocol PRPDS, after a backup service agent has received each mobile agent request and obtained its delivery sequence number from the primary service agent, the backup is responsible for processing the request and coordinating with the other replica service agents. Therefore, our strategy using the two proposed protocols can promise high scalability of replicated services a large number of mobile agents attempt to access in mobile agent systems. Our simulation results show that the proposed strategy performs much better than the one using only the traditional passive replication protocol.

Implementation of a Mobile Agent Platform for Handheld Devices to Access the SNMP MIB (SNMP MIB 액세스를 위한 휴대단말기용 이동에이전트 플랫폼)

  • 전병국;김영철
    • Journal of Internet Computing and Services
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    • v.3 no.2
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    • pp.87-95
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    • 2002
  • Due to rapid development of high speed wire/wireless internet technologies, at the current age, it cares into being one phenomenon that the internet business is able to work on anyplace and anytime. In this environment, a technology of mobile agent provides very useful mechanism for personal handheld devices because of supporting migration as autonomously executable software object Instead of users. Therefore, this paper focuses on Implementing a mobile agent platform for personal handheld devices, which supports mobile agents in wire/wireless internet environment. To do this, we construct the system with modified JAMAS, based on Java, in our previous research. Based on our proposed system, we implement the browsing application in personal handheld devices to access the MIB(Management Information Base) on SNMP(Simple Network Management Protocol), which supervises network environment on wire/wireless internet. This proposed application system is easily to access the MIB managed by SNMP agent. then provides network map viewer and updates the MIB through the browser to network administrator. As a result, we can support application area of mobile agents such as hare network management. M-Commerce, integration of remote database systems, active message and active network with personal handheld devices.

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Digital Library System by Advanced Distributed Agent Platform

  • Cho, Young-Im
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • v.4 no.1
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    • pp.29-33
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    • 2004
  • I propose a personalized digital library system (PDLS) based on an advanced distributed agent platform. The new platform is developed by improving the DECAF (Distributed Environment-Centered Agent Framework) which is one of the conventional distributed agent development toolkits. Also, a mobile ORB (Object Request Broker), Voyager, and a new multi agent negotiation algorithm are adopted to develop the advanced platform. The new platform is for mobile multi agents as well as the distributed environment, whereas the DECAF is for the distributed and non-mobile environment. From the results of the simulation the searched time of PDLS is lower, as the numbers of servers and agents are increased. And the user satisfaction is four times greater than the conventional client-server model. Therefore, the new platform has some optimality and higher performance in the distributed mobile environment.

Performance Improvement of Paging Scheme Using Paging Agent (페이징 에이전트를 이용한 페이징 방법의 성능 개선)

  • Kim Kyung-Hee;Lim Tae-Jin;Kang Hyeong-Hoon;Baek Jang-Hyun
    • Journal of Information Technology Applications and Management
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    • v.13 no.2
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    • pp.87-97
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    • 2006
  • Due to limited radio resource, an effective paging strategy is essential for improving the utility of radio channels. In current mobile communication networks, when a mobile-terminated call occurs, the network locates the mobile by paging all cells within the location area simultaneously. In this study, we introduces paging strategies that can page some cells or only one cell within the location area to reduce paging cost on radio channels using paging agents. We propose another new paging strategy that can page only one cell within the location area and may have better performance. We also compare the performance of our proposed paging strategy with the performance of the current simultaneous paging strategy and some new paging strategies using paging agents. This paper suggests the most effective paging strategy using mathematical models. The result of this research will be used to select a proper paging strategy in the mobile communication networks.

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