• Title/Summary/Keyword: application QoS

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Streaming Media QoS Evaluation based on 2-Layer mapping in Wireless Multimedia Sensor Networks (무선 멀티미디어 센서네트워크에서 2-layer 사상을 이용한 스트리밍 미디어 QoS 평가)

  • Lee, Chongdeuk
    • Journal of Digital Convergence
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    • v.11 no.5
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    • pp.313-318
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    • 2013
  • QoS in wireless multimedia sensor networks is an important issue to enhance streaming media service. This paper proposes a new 2-layer based QoS evaluation scheme for enhancing the streaming media QoS of wireless multimedia sensor networks. The proposed scheme performs the fuzzy relevance to control the streaming between application layer and network layer, and it performs 2-layer mapping process to enhance the transmission reliability and throughput. The simulation results show that the proposed scheme achieves improved performance in packet control ratio, transmission reliability, and delay overhead ratio compared with those of other existing schemes.

QoS guaranteed I-MRSVP Protocol for Supporting Integrated Mobility in Mobile Computing Environments (이동 컴퓨팅 환경에서 통합 이동성을 지원하는 QoS 보장형 I-MRSVP 프로토콜)

  • 박상윤;임동규;김원태;엄영익
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.5B
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    • pp.388-403
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    • 2003
  • RSVP was published as a resource reservation protocol to guarantee QoS for realtime applications in wired network environments. As mobile application services in wireless network environments are more popular, QoS guaranteeing problem becomes an important issue in mobile computing environments. Therefore, the researches about cooperation between RSVP and Mobile IP supporting mobility in mobile computing environments are activating today. In this paper, we propose I-MRSVP(Integrated-Mobile RSVP), a QoS guaranteed resource reservation protocol supporting the integrated mobility in mobile computing environments. I-MRSVP protocol supports the integrated mobility providing interoperability between Mobile IP-based macro cells and Cellular IP-based micro cells. To minimize resource reservation overheads, it provides efficient resource reservation functions by using the signal strength based predictive resource reservation scheme.

Scalable Two Phases QoS Routing Scheme (확장가능한 2단계 QoS 라우팅 방식)

  • 김승훈
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.12B
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    • pp.1066-1080
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    • 2003
  • In this paper a scalable QoS routing scheme for distributed multimedia applications in a hierarchical wide area network is proposed. The problem of QoS routing is formulated as a multicriteria shortest path problem, known as NP-complete. The proposed hierarchical routing scheme consists of two phases. In Phase 1, every border node periodically pre-computes the QoS distance for the paths between every pair of border nodes in any level of domain hierarchy. This phase is independet of the QoS request from an application. In Phase II, distributed graph construction algorithm is performed to model the network as a graph by retrieving pre-computed QoS distances. The graph is constructed by the on-demand algorithm and contains a part of the network topology which is completely neglected or partially considered by existing routing schemes, thus maintaining more accurate topology information. By using retrieval approach rather than advertising one, no global QoS state information exchange among nodes is needed. In this Phase, distributed partition algorithm for QoS routing problem is also performed, thus eliminating virtual links on the hierarchically complete path.

A New KFP MAC Scheduling Policy to Support QoS in Bluetooth Systems (블루투스 시스템에서 QoS 지원을 위한 새로운 KFP MAC 스케쥴링 기법)

  • Oh, Jong-Soo;Joo, Yang-Ick;Kwon, Oh-Seok;Kim, Yong-Suk;Lee, Tae-Jin;Tchah, Kyun-Hyon
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.28 no.2A
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    • pp.55-62
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    • 2003
  • This paper proposes an efficient and differentiated MAC scheduling algorithm for Bluetooth systems. The proposed algorithm guarantees QoS (Quality of Service) requirement of each master-slave pair or application. Conventional MAC scheduling algorithms for Bluetooth take priority of each pair into consideration and demonstrate relatively reasonable performance. However, their performances may depend on traffic characteristic, or they are limited by overheads for signaling. In this paper, we propose a new MAC scheduling algorithm superior to the conventional algorithms from the viewpoints of throughput, delay, and supporting QoS. Our proposed algorithm is evaluated via computer simulations under various environments and compared with the conventional scheduling algorithms. Simulation results indicate that the proposed algorithm shows better performance than the existing algorithms, and can support the QoS demand of each pair.

QoS Supporting for Media Platform located in Home Gateway using CBQ Scheduling (CBQ 스케줄링을 이용한 홈게이트웨이 내 멀티미디어 플랫폼의 QoS 제공)

  • Lee, Ho-Chan;Shin, Hye-Min
    • Proceedings of the KIEE Conference
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    • 2004.05a
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    • pp.71-73
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    • 2004
  • Recently many peoples served multimedia data from Internet. But characteristic of multimedia-object about that effect on weight and transport-time causes Streaming Application is restricted to high-quality-service. This research propose the Quality-of-service(QoS) supporting for Home Gateway that behaving Routing and media platform equipment, using CBQ Scheduling scheme. The QoS Supporting for Multimeda Service that using general Rouging policy is difficult because media platform locate in Home Gateway. Therefore this research propose Routing mechanism to QoS support of media platform located in Gateway using TCP based CBQ Control.

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QoS Guaranteed MAC protocol in Ubiquitous Sensor Networks (USN에서 QoS보장을 위한 MAC 프로토콜)

  • Kim, Seong-Hun;Goh, Sun-Bok;Lee, Seung-Keun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2008.05a
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    • pp.513-516
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    • 2008
  • The sensor node's performance is expected to be improved and the price will be largely decreased. As USN-applied field is expanded, multiple application services are expected to be provided through one USN soon. Multiple applications be required a periodic data reporting, consecutive information monitoring, event-driven data and query-based data as the data pattern that USN is delivered. Accordingly, the mechanism which can assure QoS according to each data characteristic is required. In this paper, A proposed protocol apply the duty cycle of S-MAC protocol variably and flexible according QoS level. This method largely reduces the delay on the delay-sensitive traffic, while keeping the energy efficiency.

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A study on the Backup Path of Overlay Multicast for QoS (QoS를 위한 오버레이 멀티캐스트의 복원경로에 관한 연구)

  • Kim, Hyen-Ki
    • Journal of Korea Society of Industrial Information Systems
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    • v.14 no.4
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    • pp.49-56
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    • 2009
  • Recently, studies for effective multimedia contents delivery have been widely performed in the multimedia streaming area. Overlay multicast, which can be implemented in the application layer, is method to transmit multimedia content's effectively. The Overlay multicast method can implement multicast transmission without changing the physical layer, and it has the characteristic that the application method can be diversify according to the algorithm. This paper has proposed the backup path construction method of overlay multicast for stabilized multimedia contents transmission. The proposed method can construct a backup path with the minimum searching method for guaranteed QoS(Quality of Service) and in overlay multicast so a fast and simple backup path can be constructed.

Video Stream broadcast transmission optimization using MPLS Networks (MPLS망을 이용한 Video Stream 방송 전송 최적화 기법)

  • Hwang, Seong-Kyu
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.18 no.12
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    • pp.2871-2877
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    • 2014
  • Real-time communication and diversification of multimedia application services using high-capacity data over the Internet demand high speed connection, and real-time and high-speed access internet service such as multimedia make Internet traffic increase rapidly. Meanwhile, QoS (Quality of Service) of internet service is not satisfied. In this situation, ISP (Internet Service Provider) has been required to improve service quality and extend network according to the user's needs. This request includes issue of extending network focused on increasing router and the number of routing table as well as simply extending bandwidth.

A Method on the Realization of QoS Guarantee in the Grid Network (그리드 네트워크에서의 QoS 보장방법 구현)

  • Kim, Jung-Yun;Na, Won-Shin;Ryoo, In-Tae
    • Journal of Digital Contents Society
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    • v.10 no.1
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    • pp.169-175
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    • 2009
  • Grid computing is an application to obtain the most efficient performance from computing resources in terms of cost and convenience. It is also considered as a good method to solve a problem that cannot be settled by conventional computing technologies such as clustering or is requiring supercomputing capability due to its complex and long-running task. In order to run grid computing effectively, it needs to connect high-performance computing resources in real-time which are distributed geographically. Answering to the needs of this grid application, researchers in several universities with Argonne National Laboratory in the USA (ANL) as the main axis have developed Globus. It is noticed, however, that the quality of service (QoS) is not guaranteed when certain jobs are exchanged through networks in the context of Globus. To tackle with this problem, the ANL has invented Globus Architecture for Reservation and Allocation (GARA). The researchers of this paper constructed a testbed for evaluating the ability to reserve resource in the GARA system and implemented the GARA code for it. We analyzed the applied results and discussed future research plans.

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A New Moving Mobile Base Station (MMBS) Scheme for Low Power RMIMS Wireless System(PartII:Multiple MMBS service schemes for RMIS QoS guarantee) (저전력 RMIMS 무선 터미널을 위한 새로운 움직이는 이동 기지국 시스템 구조(2부:QoS 보장을 위한 다중 MMBS 서비스 구조))

  • 박수열;고윤호;유상조;김성대
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.24 no.12B
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    • pp.2320-2334
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    • 1999
  • In this paper, we propose multiple IS-MMBS service schemes for very low power and micro-size RMIMS (radio-interfaced micro information monitoring system) terminals. In MMBS service area, when new arrival RMIMS terminals have real-time traffic characteristic or large traffic bandwidth, only single IS-MMBS service scheme can not guarantee RMIMS terminal's QoS(quality of service) such as buffer overflow or packet loss. In this case, the proposed multiple IS-MMBS service schemes can be effectively used for QoS service of RMIMS terminal. According to clustering method of RMIMS terminals and MMBS segment method, the proposed schemes can be divided into terminal segment method, region segment method, application based segment method, traffic type based segment method, overlapping segment method and hybrid segment method

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