• Title, Summary, Keyword: quality of service (QoS)

Search Result 1,375, Processing Time 0.043 seconds

A Study of IP QoS(Quality of Service) Metric Sizing Based on the Connection and Transmission Quality (접속품질과 전송품질을 기반으로 한 IP QoS(Quality of Service) 측정 메트릭스 정립)

  • Noh, SiChoon;Kim, Jeom goo
    • Convergence Security Journal
    • /
    • v.15 no.2
    • /
    • pp.57-62
    • /
    • 2015
  • IP QoS is not required to overcome the limitations of the existing Best Effort Service to connect to the explosion of the Internet traffic revenue. To IP QoS requirements of next-generation communication network, Metric Sizing Methodology is very important. However, IP networks have been developed with a focus gender flexibility and scalability than the QoS. Therefore, it is necessary to secure the quality measures for different existing IP technology to apply QoS in IP networks. When establishing the connection quality and transmission quality, based on the IP QoS(Quality of Service) objective data quality metrics can be obtained by analyzing the communication quality hindrance. Understanding the communication quality level may evaluate quality sensitive area and quality hindrance. Establish effective quality metrics can be expected to promote effective and customer satisfaction through improved quality, improved call quality for this issue.

Design of Interworking Control System between QoS Parameters and QoE Items to Control Multimedia Services Quality (멀티미디어 서비스 품질 제어를 위한 QoS 파라미터와 QoE 요소간의 연동 제어 시스템 설계)

  • Kim, Hyun-Jong;Yun, Dong-Geun;Choi, Seong-Gon
    • The Journal of the Korea Contents Association
    • /
    • v.10 no.4
    • /
    • pp.45-54
    • /
    • 2010
  • In this paper, we propose a quality interworking control system to enhance user's quality satisfaction in NGN environment by controling QoS parameters related with QoE in network layer when service user's QoE using variance multimedia service is poor. The proposed system gathers QoS parameter information in network layer through control packet such as RTCP, and evaluates QoE of multimedia service using these QoS parameter information. Comparing the evaluated QoE with the measured QoE in application layer, QCS judges quality degradation, deduces related QoS parameters and decides relative importance of each parameter when QoE is lower than threshold value. QCS generates QoS control values which is based on routing and switching policy in service quality control system(SCS) and forwards them to SCS. Through this proposed system, service and network providers can provide multimedia services of enhanced quality to service users taking account of service characteristic and network performance.

A Study of Virtual Private Network On based Environment IP Security Simulations Quality of Service Guarantee (IPSec 기반 환경하에서 QoS 보장 가상 사설망 구현 방안 연구)

  • Kim, Jeong-Hun;Yoe, Hyun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • /
    • pp.150-153
    • /
    • 2001
  • Today Internet is only Best-Effort service. During the past few years, new types of internet applications which require performance beyond the best-effort service that is provided by the current internet have emerged. These applications required QoS(Quality of Services) guarantee and Security between end-to-end. In this paper simulations Differentiated Services that IETF(Internet Engineering Task Forte) has proposed one of QoS(Quality of Services) guarantee VPN(Virtual private Network) using QoS(Quality of Services) guarantee and IP Security between end-to-end.

  • PDF

Joint Power and Rate Control for QoS Guarantees in Infrastructure-based Multi-hop Wireless Network using Goal Programming

  • Torregoza, John Paul;Choi, Myeong-Gil;Hwang, Won-Joo
    • Journal of Korea Multimedia Society
    • /
    • v.11 no.12
    • /
    • pp.1730-1738
    • /
    • 2008
  • Quality of Service (QoS) Guarantees grant ways for service providers to establish service differentiation among subscribers. On the other hand, service subscribers are also assured the level of service they paid for. In addition, the efficient level of service quality can be selected according to the subscribers' needs thus ensuring efficient use of available bandwidth. While network utility optimization techniques assure certain QoS metrics, a number of situations exist where some QoS goals are not met. The optimality of the network parameters is not mandatory to guarantee specified QoS levels. This paper proposes a joint data rate and power control scheme that guarantees service contract QoS level to a subscriber using Goal Programming. In using goal programming, this paper focuses on finding the range of feasible solutions as opposed to solving for the optimal. In addition, in case no feasible solution is found, an acceptable compromised solution is solved.

  • PDF

Policy-Based QoS Control Management System for VoIP Service (VoIP 서비스를 위한 정책 기반의 QoS 제어 관리 시스템)

  • Cho, Bong-Kwan;Jung, Jae-Il
    • Convergence Security Journal
    • /
    • v.10 no.3
    • /
    • pp.69-75
    • /
    • 2010
  • At present, deterioration in service quality, which caused by increased network traffic from a lot of users in the same network, makes smooth communication service difficult. In this paper, we present policy-based QoS management system for VoIP service in order to supply smooth VoIP service to users. The presented system can guarantee quality of VoIP service even in huge traffic situation, and makes it possible to operate whole network in an efficient manner.

A Study on QoS Measurement & Evaluation for MPEG Transmission in Network (통신망에서 MPEG 영상 전송을 위한 QoS 측정 및 평가에 관한 연구)

  • Suh Jae-Chul
    • Journal of Digital Contents Society
    • /
    • v.3 no.1
    • /
    • pp.101-111
    • /
    • 2002
  • Lately development of network around Internet expands range of data traffic to multimedia information, and so for the guarantee of multimedia services end-to-end QoS(Quality of Service) must service because comparing with existing Internet service can not support For satisfying those QoS requirements, network have to guarantee not only network on parameter, such as delay, jitter, throughput but also system resources like CPU utilization, memory usage. Therefore it is urgent to develop QoS based middleware to distribute multimedia data and maximize network utilization in the limited resource environment. And it must be necessary of network to provide end-to-end QoS(Quality of Service) for multimedia applications. Multimedia applications want that QoS which satisfy their own service properties be guaranteed Then, We must analyze those necessary QoS requirements md define QoS parameter which specify as two viewpoint, user's and network's perspective. Therefore network provider supplying network for usual user and university, enterprise must want to find about their own network performance and problem. It is essential for network manager to want to use a tool like this. On the basis of technique about QoS test-bed in the AIM network, We studied on the method of QoS measurement and management about end-to-end connection in the Internet. We measured network status about end-to-end connection and analyze the result of performance.

  • PDF

DiffServ-aware-MPLS Network Performance Analysis (DiffServ-aware-MPLS 네트워크 성능 분석)

  • Cho Hae-Seong
    • The Journal of the Korea Contents Association
    • /
    • v.4 no.4
    • /
    • pp.107-112
    • /
    • 2004
  • As the internet service evolves fast recently, guarantee request of QoS (Quality of Service) by characteristic of traffic source as well as high rate of data is going greatest. Accordingly intemet service technology also is changing rapidly, technology that guarantee QoS in existent network service technology is developed or network model that guarantee new QoS is presented. By DiffServ-aware-MPLS network that present in IETF (Internet Engineering Task Force) to guarantee QoS in this treatise does comparative analysis with existent network model, relative show that is superior, and present direction that compose next generation network wish to.

  • PDF

Provisioning of QoS Adaptability in Wired-Wireless Integrated Networks

  • Guo, Mian;Jiang, Shengming;Guan, Quansheng;Mao, Huachao
    • Journal of Communications and Networks
    • /
    • v.15 no.1
    • /
    • pp.61-70
    • /
    • 2013
  • The increasing number of mobile users and the popularity of real-time applications make wired-wireless integrated network extremely attractive. In this case, quality of service (QoS) adaptability is particularly important since some important features of the integrated network call for QoS adaptability, such as mobility, bursty applications and so on. Traditional QoS schemes include integrated service (IntServ) and differentiated service (DiffSev) as well as their variants. However, they are not able to balance well between scalability and QoS granularity. For example, IntServ faces the scalability problem, while DiffServ can only provide coarse granular QoS. In addition, they are also unable to efficiently support QoS adaptability. Therefore, a per-packet differentiated queueing service (DQS) was proposed. DQS was originally proposed to balance between scalability and QoS granularity in wired networks and then extended to wireless networks. This paper mainly discusses how to use DQS to support QoS adaptability in wired-wireless integrated networks. To this end, we propose a scheme to determine dynamic delay bounds, which is the key step to implement DQS to support QoS adaptability. Simulation studies along with some discussions are further conducted to investigate the QoS adaptability of the proposed scheme, especially in terms of its support of QoS adaptability to mobility and to bursty real-time applications.

Client level QoS/SLA Management using UML and Ontology (UML과 온톨로지를 이용한 고객 등급 QoS/SLA 관리)

  • Ha, Yan
    • Journal of the Korea Society of Computer and Information
    • /
    • v.16 no.2
    • /
    • pp.243-248
    • /
    • 2011
  • According to increasing of accessing multimedia stream contents, Web services have become popular. However, these Web services are not supported with the same quality to Web clients who frequently access multimedia services. This paper proposes ontological technique to apply client level Quality of Service(QoS) that provides two different levels to serve Web service with proper quality by contribution value. And, it describes with UML(Unified Modeling Language) how to relate QoS and SLA(Service Level Agreement). Main contribution of this paper is to support client level QoS and SLA and to use Ontology for it. Therefore, this work uses an ontology-based approach to organize QoS and SLA, enabling semantic classification of all Web services based on domains and QoS and SLA attributes.

A Broker-Based Framework for QoS-Aware Mobile Web Services Selection (품질고려 모바일 웹 서비스 선택을 위한 중개자 기반의 프레임워크)

  • Yeom, Gwy-Duk;Lee, Kun-Chang
    • Journal of the Korea Society of Computer and Information
    • /
    • v.19 no.12
    • /
    • pp.209-218
    • /
    • 2014
  • The more mobile devices consuming web services, the more QoS-aware selection of mobile web services, we need. A QoS(Quality of Service) contract is an agreement between the web service provider and the mobile user that specifies the level of the service quality. Web services users can be assured of the level of the service quality specified by the QoS contract. We propose a broker-based framework for QoS-aware mobile web services selection in this work. Under this architecture, the mobile users can request the web services through the service broker on the wireless networks. The service broker utilizes agents to monitor the web services quality and manages the service quality by notifying the service provider and mobile user of the service contract violation. Reliability, response time, and cost were the metrics used for QoS monitoring. Futhermore mobile users can select a web service best suited for his/her needs through the service broker.