• Journal of Internet Computing and Services
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• v.13 no.2
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• pp.73-86
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• 2012

This paper theoretically derives an algorithm to discover a new type of social networks from workflow models, which is termed workflow-based social network intelligence. In general, workflow intelligence (or business process intelligence) technology consists of four types of techniques that discover, analyze, monitor and control, and predict from workflow models and their execution histories. So, this paper proposes an algorithm, which is termed ICN-based workflow-based social network intelligence discovery algorithm, to be classified into the type of discovery techniques, which are able to discover workflow-based social network intelligence that are formed among workflow performers through a series of workflow models and their executions, In order particularly to prove the correctness and feasibility of the proposed algorithm, this paper tries to apply the algorithm to a specific workflow model and to show that it is able to generate its corresponding workflow-based social network intelligence.

• Journal of KIISE:Information Networking
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• v.37 no.5
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• pp.317-326
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• 2010

Nowadays, transmission bandwidth for network traffic is increasing and the type is varied such as peer-to-peer (PZP), real-time video, and so on, because distributed computing environment is spread and various network-based applications are developed. However, as PZP traffic occupies much volume among Internet backbone traffics, transmission bandwidth and quality of service(QoS) of other network applications such as web, ftp, and real-time video cannot be guaranteed. In previous research, the port-based technique which checks well-known port number and the Deep Packet Inspection(DPI) technique which checks the payload of packets were suggested for solving the problem of the P2P traffics, however there were difficulties to apply those methods to detection of P2P traffics because P2P applications are not used well-known port number and payload of packets may be encrypted. A proposed algorithm for identifying P2P heavy traffics based on flow transport parameters and behavioral characteristics can solve the problem of the port-based technique and the DPI technique. The focus of this paper is to identify P2P heavy traffic flows rather than all P2P traffics. P2P traffics are consist of two steps i)searching the opposite peer which have some contents ii) downloading the contents from one or more peers. We define P2P flow patterns on these P2P applications' features and then implement the system to classify P2P heavy traffics.

• The Journal of Society for e-Business Studies
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• v.9 no.1
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• pp.197-208
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• 2004

As the structure of an enterprise becomes complicated and distributed, the interoperability between workflow systems for the process automation among partners or departments is rising as an important issue. For the interoperability between workflow systems, we propose a data exchange scenario based on mobile agents. The scenario includes sequence diagrams and methods defined by UML. The mobile agents are designed based on the mobile agent standard, MASIF, developed by OMG. In order to prove the applicability of the mobile agent technology to workflow interoperability, we have developed a prototype function which creates and transfers mobile agents.

• Journal of KIISE:Computer Systems and Theory
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• v.32 no.11_12
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• pp.617-628
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• 2005

The services for ubiquitous computing environments have to provide automatically user-specific adaptive services in dynamically changed environments with many informations provided by both a user and his/her environment. Workflows used in business and distributed computing environments support service automation by connecting many tasks with rules or orderings of tasks. Therefore we must specify context information on transition condition to support context-aware services by adapting a workflow to ubiquitous computing environments. In this paper, we present a structural context model to specify context information on transition constraints of the workflow. And we propose an uWDL Ubiquitous Workflow Description Language) based on web services, which provides web service interfaces which are standardized and independent on heterogeneous and various platforms, protocols, and languages. The uWDL tan be interpreted and executed by a workflow engine, and provide users autonomic services based on context-awareness.

• The KIPS Transactions:PartC
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• v.18C no.6
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• pp.423-432
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• 2011

Recently, OpenFlow has been paid attention to as a fundamental technology which provides a function of virtualization and programmability in network. In Korea, deployment of OpenFlow networks in campuses and the interconnection between them through tunneling in layer 3 has been performed. However, the performance of the interconnected networks is decreased due to delay in IP layer. In this paper, we design and deploy nation-wide, not local, OpenFlow networks in a pure layer 2 environment over KREONET. After that, we do end-to-end Round-trip Time measurements and TCP/UDP performance tests in OpenFlow and normal networks, and do comparison and analysis on the test results. The results show that the nation-wide OpenFlow networks provide equal performance to normal networks except for the initial packet loss for UDP streaming. In regards to the performance decrease due to early UDP packet loss, we can mitigate it by implementing exceptional procedures in a controller which deal with the same continuous "Packet_in" events.

• Journal of Internet Computing and Services
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• v.3 no.4
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• pp.19-26
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• 2002

Workflow Management Systems(WFMSs) is a software system that supports that specification and execution of business processes. In this paper, we proposed Multi Agent Based Workflow Modeling System which was implemented by Java application. The proposed workflow modeling system is divided into four agents; Session, Organization, Relevant Data. Invoked Application. We adapted ICN(Information Control Net) to check workflow model syntax, And the proposed modeling system provide the function to import/export WPDL which was defined in WfMC.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.936-940
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• 2002

역할기반 접근통제(RBAC, Role-Based Access Control)의 개념은 접근통제의 전통적인 강제적 접근통제(MAC, Mandatory Access Control) 및 임의적 접근통제(DAC, Discretionary Access Control)의 대안으로서 많은 관심을 집중시키고 있다. 그러나 역할기반 접근통제를 워크 플로우 시스템에 그대로 적용할 경우에 의무 분리가 복잡해지고, 의무분리를 통해 상호 배타적인 역할을 가지지 못하게 했을 때 서로 관계없는 워크 플로우를 동시에 처리 못하게 되는 문제점이 발생할 수 있다. 이것을 해결하기 위하여 기업 환경의 특성으로 고려한 과업 역할기반 접근제어 모델(TRBAC: Task Role Based Access Control)이 제안되었다. 본 논문에서는 TRBAC의 워크 플로우 과업 관리를 위하여 과업(Task)을 역할(Role)에 할당하는 과업 - 역할할당(TRA)모델을 제안하고 이를 구현한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.1532-1533
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• 2011

본 논문에서는 다중 테넌트를 지원하기 위한 액티비티 기반의 워크를로우 설정 방법을 제안한다. 이를 위해서, 다중 테넌트가 하나의 워크플로우 인스턴스를 사용할 때, 액티비티 기반으로 워크플로우를 테넌트에 맞게 설정하는 방법과, 워크플로우 액티비티를 별도의 메타데이터로 관리하는 방법을 제공한다.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.11
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• pp.73-82
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• 2011

As a demand of IP based packet service is increasing, transport network is evolving from circuit based transport technology using TDM to Ethernet based packet transport technology. In this paper we introduce packet transport network based on PBB-TE and MPLS-TP and propose a quality of service(QoS) management scheme to satisfy various user requirements in packet transport network. The proposed flow-based QoS management scheme guarantees that per-flow bandwidth control satisfies the predefined QoS requirement perfectly under bandwidth congestion condition by using perflow and per-PTL tunnel management. In order to evaluate the proposed scheme we defined flow and PTL tunnel per input frame and configured QoS parameters for each flow and PTL tunnel respectively. Simulation was done by using OPNET modeler 16.0 version.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.04a
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• pp.77-82
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• 2000

본 논문에서는 워크플로우 모델링 도구인 ICN(Information Control Net) 모델을 이용하여 워크플로우 역할 의존성 분석 메커니즘을 제안하였다. 즉, ICN 모델로 정의된 워크플로우의 각 액티비티(activity)들 간에 존재하는 역할 의존 관계를 표현하기 위하여 역할 의존 넷(Role Dependency Net)을 정의하였고, ICN 모델로부터 역할 의존 넷을 생성하는 알고리즘을 제안하였다. 본 논문에서 제시된 알고리즘을 이용하여 생성된 역할 기반의 워크플로우 모델은 any-cast 워크플로우와, multi-cast 워크플로우 작업환경을 제공함으로써 현재 대부분 조직에서의 작업 환경인 객체지향 작업 환경 및 분산 작업 환경에서 워크플로우 관리 시스템을 구축할 수 있다.