• Title/Summary/Keyword: application QoS

Search Result 299, Processing Time 0.024 seconds

Study QoS algorithms For ethernet traffic handling performance On MOST 150 Gateway (MOST150 Gateway의 Ethernet 트래픽 처리 성능 향상을 위한 QoS 알고리즘에 관한 연구)

  • Kim, Chang-young;Jang, Jong-wook;Yu, Yun-sik
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2009.10a
    • /
    • pp.780-783
    • /
    • 2009
  • The application of MOST150 technology has been required to satisfy the demand for the automotive infotainment system and the higher bandwidth requirements caused by the increase of the multimedia processing capacity. The Ethernet technology applied gateway was implemented for an efficient transmission of multimedia, a vehicle diagnosis, an external communication, a data processing between the MOST150 and the CAN communication method applied to many existing vehicles. The new algorithm and application were suggested in order to efficiently perform the data processing between other types of communication systems. The existing MOST150 frame is mainly composed of the Control Channel, the Legacy Packet Channel(async) and the Synchronous /Isochronous Channels and performs the data processing through these sequential channels. With the sense of this process, this study suggested the new algorithm that the Mapping method of the IETF's QoS Management was applied to the MOST150 technology for the efficient QoS.

  • PDF

High Performance QoS Multicast Routing Scheme for Real-Time Mobile Multimedia Applications in Wireless Mesh Networks (무선메쉬네트워크에서 실시간 이동 멀티미디어 응용을 위한 고성능 QoS 멀티캐스트 라우팅 기법)

  • Kang, Moonsik
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.52 no.6
    • /
    • pp.85-94
    • /
    • 2015
  • In this paper, an enhanced QoS multicast routing scheduling scheme is proposed to adapt to a dynamic mobile traffic condition for wireless mesh networks (WMNs). It handles the network QoS by controlling the delay constraints for multimedia applications. The group size will be controlled according to both the current network state and QoS requirements. The dynamic reconstruction of QoS multicast tree can be obtained from preprocessing with both the partial multicast routing scheme and the traffic estimation. Performance evaluation of the proposed scheme is carried out on randomly generated graph derived from the wireless mesh network, by choosing the optimal value related to the appropriate delay bounds. Simulation results show that the proposed scheme can improve the performance of QoS multicast routing for WMNs.

QoS improving method of Smart Grid Application using WMN based IEEE 802.11s (IEEE 802.11s기반 WMN을 사용한 Smart Grid Application의 QoS 성능향상 방안 연구)

  • Im, Eun Hye;Jung, Whoi Jin;Kim, Young Hyun;Kim, Byung Chul;Lee, Jae Yong
    • Journal of the Institute of Electronics and Information Engineers
    • /
    • v.51 no.1
    • /
    • pp.11-23
    • /
    • 2014
  • Wireless Mesh Network(WMN) has drawn much attention due to easy deployment and good scalability. Recently, major power utilities have been focusing on R&D to apply WMN technology in Smart Grid Network. Smart Grid is an intelligent electrical power network that can maximize energy efficiency through bidirectional communication between utility providers and customers with ICT(Information Communication Technology). It is necessary to guarantee QoS of some important data in Smart Grid system such as real-time data delivery. In this paper, we suggest QoS enhancement method for WMN based Smart Grid system using IEEE 802.11s. We analyze Smart Grid Application characteristics and apply IEEE 802.11s WMN scheme for Smart Grid in domestic power communication system. Performance evaluation is progressed using NS-2 simulator implementing IEEE 802.11s. The simulation results show that the QoS enhancement scheme can guarantee stable bandwidth irrespective of traffic condition due to IEEE 802.11s reservation mechanism.

ADesign and Implementation of Policy-based Network Management System for Internet QoS Support Mobile IP Networks (인터넷 QoS 지원 이동 IP 망에서의 정책기반 망 관리 시스템 설계 및 구현)

  • 김태경;강승완;유상조
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.29 no.2B
    • /
    • pp.192-202
    • /
    • 2004
  • In this paper we have proposed policy-based network management system architecture for Internet QoS support Mobile IP networks that is divided into four layers(application layer, information management layer, policy control layer, device layer), then we propose an implementation strategy of policy-based network management system to enforce various control and network management operations and a model of policy server using SCOPS(Simple Common Open Policy Service) protocol that is developed in this research. For policy-based mobile IP network management system implementation, we have derived four policy classes(access control, mobile IP operation, QoS control, and network monitoring) and we showed operation procedures for each policy scenarios. Finally we have implemented Internet QoS support policy-based mobile IP network testbed and management system and verified out DiffServ policy enforcement behaviors for a target class service that is arranged a specific bandwidth on network congestion conditions.

A Performance Analysis of IP Multicasting using Resource Reservation over ATM Networks (ATM 망에서 자원 예약 방식을 이용한 IP 멀티캐스팅의 성능 분석)

  • 봉은철;김동일;최영진;양기원;오창석
    • The KIPS Transactions:PartC
    • /
    • v.8C no.1
    • /
    • pp.41-50
    • /
    • 2001
  • With growth of Internet, real time multimedia application services require guarantee of QoS (Quality of Service). However, the existing Internet based on best-effort service is not enough to support those services, so MARS model to support IP multicast over ATM networks and RSVP to provide heterogeneous QoS by resource reservation scheme are proposed. As a simulation result, it is proved that processing delay of MARS is increased and success of resource reservation is decreased as a number of QoS change request of a receiver is increased. Therefore, it is important to provide heterogeneous QoS that distribute a load of MARS caused by convergence of messages and efficiently manage the resource of network as to find out scale of receivers and frequency of QoS change request.

  • PDF

An Integrated File System for Guaranteeing the Quality of Service of Multimedia Stream (멀티미디어 스트림의 QoS를 보장하는 통합형 파일시스템)

  • 김태석;박경민;최정완;김두한;원유집;고건;박승민;김정기
    • Journal of KIISE:Computer Systems and Theory
    • /
    • v.31 no.9
    • /
    • pp.527-535
    • /
    • 2004
  • Handling mixed workload in digital set-top box or streaming server becomes an important issue as integrated file system gets momentum as the choice for the next generation file system. The next generation file system is required to handle real-time audio/video playback while being able to handle text requests such as web page, image file, etc. Legacy file system provides only best effort I/O service and thus cannot properly support the QoS of soft real-time I/O. In this paper, we would like to present our experience in developing the file system which fan guarantee the QoS of multimedia stream. We classify all application I/O requests into two category: periodic I/O and sporadic I/O. The QoS requirement of multimedia stream could be guaranteed by giving a higher priority to periodic requests than sporadic requests. The proto-type file system(Qosfs) is developed on Linux Operating System.

Network Adaptive Quality of Service Method in Client/Server-based Streaming Systems (클라이언트/서버 기반 스트리밍 시스템에서의 네트워크 적응형 QoS 기법)

  • Zhung, Yon-il;Lee, Jung-chan;Lee, Sung-young
    • The KIPS Transactions:PartA
    • /
    • v.10A no.6
    • /
    • pp.691-700
    • /
    • 2003
  • Due to the fast development of wire&wireless internet and computer hardware, more and more internet services are being developed, such as Internet broadcast, VoD (Video On Demand), etc. So QoS (Qualify of Service) is essentially needed to guarantee the quality of these services. Traditional Internet is Best-Effort service in which all packets are transported in FIFO (First In First Out) style. However, FIFO is not suitable to guarantee the quality of some services, so more research in QoS router and QoS protocol are needed. Researched QoS router and protocol are high cost and inefficient because the existing infra is not used. To solve this problem, a new QoS control method, named Network Adaptive QoS, is introduced and applied to client/server-based streaming systems. Based on network bandwidth monitoring mechanism, network adaptive QoS control method can be used in wire&wireless networks to support QoS in real-time streaming system. In order to reduce application cost, the existing streaming service is used in NAQoS. A new module is integrated into the existing server and client. So the router and network line are not changed. By simulation in heavy traffic network conditions, we proved that stream cannot be seamless without network adaptive QoS method.

Multi-Homing RTP (mhRTP) for QoS-guaranteed Vertical Handover in Heterogeneous Wireless Access Networks

  • Kim, Igor;Kim, Young-Tak
    • IEMEK Journal of Embedded Systems and Applications
    • /
    • v.5 no.4
    • /
    • pp.185-194
    • /
    • 2010
  • In this paper, we propose an application layer-based vertical handover management protocol, called multihoming RTP (mhRTP), for real-time applications with seamless mobility across heterogeneous wireless access networks. The proposed multi-homing RTP provides a soft handover by utilizing multiple available wireless access network interfaces simultaneously. The newly available path is dynamically added to the ongoing session by the mhRTP session manager. Also the decision making of QoS-improving or QoS-guaranteed handover is possible based on the estimation of available bandwidth in each candidate network. The performances of the proposed mhRTP have been analyzed through a series of simulations on OPNET network simulator. From the performance analysis, we confirmed that the proposed mhRTP can provide QoS-guaranteed vertical handover with efficient session managements.

A study on the Application of Policy-Based Networking for QoS in The Defense Information System (국방정보체계의 서비스 품질(QoS) 보장을 위한 정책기반(Policy-Based)네트워킹 적용에 관한 연구)

  • 김광영;이승종
    • Journal of the military operations research society of Korea
    • /
    • v.29 no.1
    • /
    • pp.57-75
    • /
    • 2003
  • Policy-based networking offers a network manager the ability to manage the network in a holistic and dynamic fashion rather than force a network manager to manage the network by dealing with each device individually. Policy-based networking is focusing on users and applications instead of emphasizing devices and interfaces. An important part of the policy-based networking is to simplify the task of administration and management for different disciplines. The Defense Information System(DIS) of today are complex and heterogeneous systems. Operational needs are not a trivial task and Quality of Service(QoS) is not generally guaranteed. So, important data may be missed or congested by trivial data. Policy-based networking provide a way to support QoS and simplify the management of multiple devices deploying complex technologies. This paper suggest implementation of policy-based networking in DIS to improvement of performance, and implementation is progressed step by step. Especially this paper is focusing on the providing QoS with policy-based networking using Lightweight Directory Access Protocol(LDAP) Server.

QoS Differentiated and Highly Reliable MPLS based IP-VPN Service Module (품질차별화가 가능한 고신뢰도의 MPLS 기반 IP-VPN 서비스 모듈)

  • 윤호선;양선희;이유경
    • Journal of KIISE:Computing Practices and Letters
    • /
    • v.8 no.6
    • /
    • pp.727-735
    • /
    • 2002
  • In this paper, we design and implement a MPLS based IP-VPN service module as an application for ACE2000 MPLS system. ACE2000 MPLS VPN service module has been developed using the BGP4 extension protocol. The IP-VPN service module supports differentiated QoS using the MPLS traffic engineering. In addition, it offers a path protection mechanism and the restart mechanism of MPLS system and forwarding engine for supporting a highly reliable service.