• Journal of the Institute of Electronics and Information Engineers
• /
• v.52 no.2
• /
• pp.127-137
• /
• 2015

Various services such as IPTV(Internet Protocol TV), Internet Telephony are provided through multiple ISPs(Internet Service Providers) as ICT technologies are evolving. This paper suggests that the end-to-end Internet service quality evaluation method, which is optimized for domestic environment based on international standards. The end-to-end service quality determines the quality of IPTV and Internet Telephony services and is critical factor for subjective quality as well. As a result, time delay, jitter and packet loss rate are three elements for the quality evaluation. It is also shown that these factors can be predicted with traditional statistical method by sharing minimum amount of information between ISPs.

• Proceedings of the Korean Information Science Society Conference
• /
• 2001.10c
• /
• pp.754-756
• /
• 2001

현재 인터넷 사용자의 증가와 더불어 사용자들이 원하는 서비스가 다양해짐에 따라 기존의 Best effort 서비스로는 사용자들이 요구하는 응용 서비스들을 제대로 지원할 수가 없게되었고, 이에 IETF(Internet Engineering Task Force)애서는 사용들의 QoS 제공을 위해 Integrated service model과 Differential service model이 제안되었다. 그러나 소규모 망에서 적용 가능한 Intserv와 대규모 망에서 사용적절한 Diffserv망의 service 방식이 다르기 때문에 End-to-End간에 QoS 제공을 위해서는 이에 대한 망의 연동이 필요하다. 본 논문에서는 두 망간의 연동을 위한 Framework을 제안하였다.

• 한국정보통신설비학회:학술대회논문집
• /
• 2009.08a
• /
• pp.333-336
• /
• 2009

DSON is a service overlay network architecture that can guarantee end-to-end quality of service to home network area. DSON makes service possible to be provided dynamically. This paper gives service model and scenario using DSON architecture.

• Journal of Communications and Networks
• /
• v.11 no.3
• /
• pp.297-305
• /
• 2009

Multiprotocol label switching (MPLS) networks require dynamic flow admission control to guarantee end-to-end quality of service (QoS) for each Internet protocol (IP) traffic flow. In this paper, we propose to tackle the joint routing and admission control problem for the IP traffic flows in MPLS networks without rerouting already admitted flows. We propose two mathematical programming models for this problem. The first model includes end-to-end delay constraints and the second one, end-to-end packet loss constraints. These end-to-end QoS constraints are imposed not only for the new traffic flow, but also for all already admitted flows in the network. The objective function of both models is to minimize the end-to-end delay for the new flow. Numerical results show that considering end-to-end delay (or packet loss) constraints for all flows has a small impact on the flow blocking rate. Moreover, we reduces significantly the mean end-to-end delay (or the mean packet loss rate) and the proposed approach is able to make its decision within 250 msec.

• Proceedings of the IEEK Conference
• /
• 2002.06a
• /
• pp.53-56
• /
• 2002

In this paper, we study the network structure that can guarantee the end-to-end quality of service in the Explicit multicast network. In order to guarantee the end-to-end quality of service, we adopt the end-to-end measurement based admission control (EMBAC) scheme. For the effective measurement of the network state and minimum influence on the current data traffic, the queue structure, which the drop precedence in assured forwarding (AF) Per hop behavior (PHB) of the differentiated service (Diffserv) is applied to, is proposed. Through a simulation, we show that EMBAC can make tile controlled load service in tile AF PHB applied Xcast network, and the qualify of the admitted traffic is guaranteed. In addition, the performance of the EMBAC is changing according to the selling parameter of AF PHB.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2001.10a
• /
• 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.

• The KIPS Transactions:PartC
• /
• v.12C no.6 s.102
• /
• pp.781-792
• /
• 2005

This study proposes an Architecture for user level End-to-end Quality of Service(QoS) using overlay In Next Generation Network(NGN). Inexisting NGNs, the IMS of a control plane provides user QoS through direct traffic control and resource-reservation over the IP packet transport network of a user plane. Further, a set of torrent studies are ongoing not only to maximize the QoS for users, but also to minimize the quality deterioration for supporting the user End-to-end QoS. Along with that, an extended QoS in user level must be considered, for Instance, differentiating service quality to support users' expectation, providing optimized contents by users' equipments, and so forth. Accordingly, the Overlay Service Network Architecture proposed by this study provides protocol adaptation for maximum throughput on transport layer by using the most efficient transport layer protocol to various network circumstances. Also, the Overlay Service Network Architecture on application layer distributes processing delay from the data transformation process of the user equipment to the network, and it is capable of intermediate processing depending on user service level. application service feature, and equipment circumstance as well. Thus, this study mainly proposes the Overlay Service Network Architecture for user level end-to-end QoS in NGN with the quality control features both on the transport layer and the application layer, an internal component feature, and a service scenario providing the QoS linking with 3GPP.

• 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.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 1998.05a
• /
• pp.282-287
• /
• 1998

최근 인터넷에서는 Mbone, 인터넷 폰과 같이 End-to-End QoS (Quality of Service) 보장을 요구하는 많은 실시간 멀티미디어 응용들이 출현하고 있다[1]. 인터넷 표준 기구인 IETF (Internet Engineering Task Force)에서는 과거 수년간, 이러한 실시간 멀티미디어 응용들을 지원하기 위한 Integrated Service 구조를 개발하고 자원 예약 프로토콜로서 RSVP (Resource Reservation Protocol)를 개발하였다. 하지만, flow를 기본 단위로 하여 자원을 예약하고 패킷을 처리하는 Integrated Service 모델은 인터넷에 광역적으로 구축되기에는 너무 복잡한 것으로 드러났다. 이에 따라, 큰 규모의 인터넷 전달망에 적용할 경우 scalability 문제를 안고 있는 Integrated Service 모델의 대안 또는 보완책으로, Differentiated Service 구조가 작년부터 IETF에서 활발히 논의되어 왔다. [2,3,4]. 본 논문에서는 Differentiated Service의 구조 및 구성요소의 개념을 살펴보고, RSVP/Integrated Service 구조와 어떻게 공존하여 광역 인터넷에서 End-to-End QoS를 제공할 수 있을지를 고찰한 다음, 향후 기술 발전을 전망한다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.28 no.2B
• /
• pp.144-156
• /
• 2003

Internet/Intranet has been continuously enhanced by new emerging IP technologies such as differentiate service(DiffServ), IPSec(IP Security) and MPLS(Multi-protocol Label Switching) traffic engineering. According to the increased demands of various real-time multimedia services, ISP(Internet Service Provider) should provide enhanced end-to-end QoS(quality of service) and security features. Therefore, Internet and Intranet need the management functionality of sophisticated traffic engineering functions. In this paper, we design and implement the performance management functionality for the guaranteed end-to-end QoS provisioning on MPLS-based VPLS(Virtual Private LAN Service). We propose VPLS OAM(Operation, Administration and Maintenance) for efficient performance management. We focus on a scheme of QoS management and measurement of QoS parameters(such as delay, jitter, loss, etc.) using VPLS OAM functions. The proposed performance management system also supports performance tuning to enhance the provided QoS by re-adjusting the bandwidth of LSPs for VPLS. We present the experimental results of performance monitoring and analysis using a network simulator.