• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.223-226
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• 2017

미디어의 생성 및 소비를 위한 기기의 다양화 및 소형화와 이로 인한 미디어 생성 및 소비의 패러다임이 변화함으로 인해, 이와 같은 시장의 요구사항에 부합하기 위한 다양한 기술의 개발 및 표준화가 가속화되고 있다. 이러한 시대의 변화에 발맞추어 국제 표준화 기구인 MPEG 은 네트워크 상에서의 다양한 미디어 간 시공간적 관계를 파악하고 관리하기 위한 표준인 Media Orchestration 표준화를 진행하였다. 이에 본 논문에서는 Media Orchestration 에서 제시한 미디어 간 공간적 Orchestration 구조를 기반으로 다양한 Metadata 를 이용하여 단말 및 미디어 간의 공간적 관계의 기술, 전달 및 소비 방안을 제시하였다.

• International journal of advanced smart convergence
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• v.12 no.4
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• pp.126-133
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• 2023

Recent advancements in cloud service virtualization technologies have witnessed a shift from a Virtual Machine-centric approach to a container-centric paradigm, offering advantages such as faster deployment and enhanced portability. Container orchestration has emerged as a key technology for efficient management and scheduling of these containers. However, with the increasing complexity and diversity of heterogeneous workloads and service types, resource scheduling has become a challenging task. Various research endeavors are underway to address the challenges posed by diverse workloads and services. Yet, a systematic approach to container orchestration for effective cloud management has not been clearly defined. This paper proposes the DRA-Engine (Dynamic Resource Allocation Engine) for resource scheduling in container orchestration. The proposed engine comprises the Request Load Procedure, Required Resource Measurement Procedure, and Resource Provision Decision Procedure. Through these components, the DRA-Engine dynamically allocates resources according to the application's requirements, presenting a solution to the challenges of resource scheduling in container orchestration.

• Journal of the Korea Society for Simulation
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• v.16 no.4
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• pp.77-86
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• 2007

Web services are considered as the critical component in the business plans of corporations as they offers the potential for creating highly dynamic and versatile distributed applications that span across business boundaries. Web Service Orchestration studies composition of already-existing web services to create new value-added services. The composite web services could be executed in a centralized or peer-to-peer(P2P) orchestration model. Compared with centralized-orchestration model, the P2P-based orchestration model provides better scalability, reliability, and performance for the overall services. However, recent P2P-orchestration solutions have limitation in supporting complex workflow patterns. Therefore, they could not effectively handle sophisticated business workflow, which contains complex workflow patterns. In this paper, we propose the WORKGLOW system, which can deal with complex workflow patterns while it is able to perform composite services in P2P orchestration manner. Comparing with centralized orchestration systems, the WORKGLOW brings up more business logic advantages, better performance, and higher flexibility with only a little overhead.

• KIPS Transactions on Computer and Communication Systems
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• v.4 no.3
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• pp.91-96
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• 2015

Recently, the 'mobility' is one of the essential item in the field of IT. This means that 'mobility' are good mediators to get collecting user's behavior and provide freedom of mobility service for user's. This paper is proposed a mobility process orchestration(MPO) model that provide multimedia to various devices. The orchestration model provides the structure and function that can be objectify a physical devices in a user's environment to provide orchestrated service of various devices to user using a concept of MSMP(Multi Source Multi Platform). Also, using the concept of Choreography can be extracted appropriate device of the various media formats for harmonious service.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.15 no.12
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• pp.4364-4384
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• 2021

The dynamic network state and the mobility of the terminals make the service function chain (SFC) orchestration mechanisms based on static and deterministic assumptions hard to be applied in SDN/NFV mobile edge computing networks. Designing dynamic and online SFC orchestration mechanism can greatly improve the execution efficiency of compute-intensive and resource-hungry applications in mobile edge computing networks. In order to increase the overall profit of service provider and reduce the resource cost, the system running time is divided into a sequence of time slots and a dynamic orchestration scheme based on an improved column generation algorithm is proposed in each slot. Firstly, the SFC dynamic orchestration problem is formulated as an integer linear programming (ILP) model based on layered graph. Then, in order to reduce the computation costs, a column generation model is used to simplify the ILP model. Finally, a two-stage heuristic algorithm based on greedy strategy is proposed. Four metrics are defined and the performance of the proposed algorithm is evaluated based on simulation. The results show that our proposal significantly provides more than 30% reduction of run time and about 12% improvement in service deployment success ratio compared to the Viterbi algorithm based mechanism.

• Journal of information and communication convergence engineering
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• v.7 no.3
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• pp.253-257
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• 2009

As the value of B2B integration gets more importance and the business process becomes more complex, BPEL4WS standard has been focused for the solution of the problems which is based on web service technology. Many vendors implement the standard in their systems to integrate B2B and web service based inner-Enterprise Application(EA)s. But there is no way to use the standard to integrate non-web service based EAs, because the standard is designed only for Service Oriented Architecture (SOA) over web services. This paper proposes Hybrid Service Orchestration Framework to participate web services and also non-web service based EAs in the business process as a partner using BPEL4WS standard. The framework introduces Hybrid Service Architecture to represent non-web service based EAs as a service, so BPEL4WS could be used to integrate web services and non-web service based EAs. And the framework also introduces Hybrid Service Toolkit to support software level facilities. The paper also introduces Hybrid Orchestration System that is based on Hybrid Service Orchestration Framework.

• KNOM Review
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• v.23 no.2
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• pp.29-41
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• 2020

Networks are growing faster than ever before causing a multi-domain complexity. The diversity, variety and dynamic nature of network traffic and services require enhanced orchestration and management approaches. While many standard orchestrators and network operators are resulting in an increase of complexity for handling E2E slice orchestration. Besides, there are multiple domains involved in E2E slice orchestration including access, edge, transport and core network each having their specific challenges. Hence, handling of multi-domain, multi-platform and multi-operator based networking environments manually requires specified experts and using this approach it is impossible to handle the dynamic changes in the network at runtime. Also, the manual approaches towards handling such complexity is always error-prone and tedious. Hence, this work proposes an automated and abstracted solution for handling E2E slice orchestration using an intent-based approach. It abstracts the domains from the operators and enable them to provide their orchestration intention in the form of high-level intents. Besides, it actively monitors the orchestrated resources and based on current monitoring stats using the machine learning it predicts future utilization of resources for updating the system states. Resulting in a closed-loop automated E2E network orchestration and management system.

• Journal of the Korea Society of Computer and Information
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• v.14 no.9
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• pp.1-10
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• 2009

The field of the web service orchestration introduced to generate a valuable service by reusing single services. Recently, it suggests rule-based searching and composition by the AI (Artificial Intelligence) instead of simple searching or orchestration based on the IOPE(Input, Output, Precondition, Effect) to implement the Semantic web as the web service of the next generation. It introduce a AOP programming paradigm from existing object-oriented programming paradigm for more efficient modularization of software. In this paper, we design a dynamic web service orchestration and invocation scheme applying Aspect-Oriented Programming (AOP) and Reflection for Semantic web. The proposed scheme makes use of the Reflection technique to gather dynamically meta data and generates byte code by AOP to compose dynamically web services. As well as, our scheme shows how to execute composed web services through dynamic proxy objects generated by the Reflection. For performance evaluation of the proposed scheme, we experiment on search performance of composed web services with respect to business logic layer and user view layer.

• Electronics and Telecommunications Trends
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• v.30 no.2
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• pp.95-103
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• 2015

오픈스택(OpenStack)을 이용한 클라우드 서비스가 점차 확산되어가면서 수많은 가상 자원들을 생성하고 생성된 가상 자원들의 라이프사이클을 관리하는 오케스트레이션 기능의 중요성이 강조되고 있다. 본고에서는 오픈스택 진영에서 템플릿 기반의 오케스트레이션 서비스를 담당하고 있는 Heat의 기본구조와 함께 Heat에서 정의하고 있는 HOT(Heat Orchestration Template) 템플릿의 구성 요소와 주요 특징을 정리하고 템플릿 간에 참조 관계를 설명하는 Nested Stack 개념을 소개한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.595-596
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• 2023

본 논문에서는 컨테이너 오케스트레이션 플랫폼에 대하여 분석하고자 한다. 공공 클라우드 전환 로드맵 검토에 따라 클라우드 네이티브 전환을 위한 기술로 컨테이너, 마이크로서비스, 컨테이너 오케스트레이션의 중요성이 강조되고 있다. 대표적인 컨테이너 오케스트레이션 도구인 Kubernetes, Docker Swarm, Mesos를 비교하며, 이들의 초기 설치 용이성, 볼륨 관리, 애플리케이션 배포, 장애 관리 등에 대해 분석하고, 이를 통해 각 도구의 장단점과 적용 상황에 따른 고려사항을 파악함으로써, 클라우드 네이티브 전환 로드맵 수립에 도움을 제공하고자 한다.