異なる品質要求を持つ複数ユーザへのピアツーピアビデオ配信手法  [in Japanese] A Video Delivery Method for Users with Different Quality Requirements in P2P Networks  [in Japanese]

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Author(s)

    • 孫Tao SUN TAO
    • 奈良先端科学技術大学院大学情報科学研究科 Graduate School of Information Science, Nara Institute of Science and Technology
    • 安本 慶一 YASUMOTO KEIICHI
    • 奈良先端科学技術大学院大学情報科学研究科 Graduate School of Information Science, Nara Institute of Science and Technology
    • 伊藤 実 ITO MINORU
    • 奈良先端科学技術大学院大学情報科学研究科 Graduate School of Information Science, Nara Institute of Science and Technology

Abstract

本論文では,多数のユーザが異なる品質で同じビデオの配信を要求する場合に,各ユーザノードにトランスコードおよび中継を行わせることで,ピアツーピアネットワークにおいて効率良くビデオを同時配信するMTcast と呼ぶ新しいビデオ同時配信手法を提案する.MTcast では,各ユーザ(ビデオ受信者)が各自の環境の制約に基づいて決定した要求品質を指定したビデオ配信要求を送ると,すべてのユーザが1 つの配送木を経由して要求と同じかそれに近い品質のビデオを受信することができる.MTcast は,ユーザ数に対する高いスケーラビリティ,受信品質に対する高いユーザ満足度,配送開始までの待ち時間の短さや,ノードの故障に対する耐頑健性等の特徴を持つ.シミュレーションおよびPlanetLab 上の評価実験を通して,提案手法が高い耐故障性とスケーラビリティ,短い配送開始遅延,および階層型マルチキャスト方式よりも高いユーザ満足度を達成することを確認した.In this paper, we propose a new video delivery method called MTcast (Multiple Transcode based video multicast) which achieves efficient simultaneous video delivery to multiple users with different quality requirements by relying on user nodes to transcode and forward video to other user nodes in P2P networks. In MTcast, each user specifies a quality requirement for a video consisting of bitrate, picture size and frame rate based on the user's environmental resource limitations. All users can receive video with the specified quality (or near this quality) along a single delivery tree. The main characteristics of MTcast are in its scalability, high user satisfaction degree in received video quality, short startup latency and high robustness against node failure. Through simulations and experiments with our prototype implementation on PlanetLab, we have confirmed that MTcast can achieve practically high scalability and robustness, short startup latency and much higher user satisfaction than the layered multicast method.

In this paper, we propose a new video delivery method called MTcast (Multiple Transcode based video multicast) which achieves efficient simultaneous video delivery to multiple users with different quality requirements by relying on user nodes to transcode and forward video to other user nodes in P2P networks. In MTcast, each user specifies a quality requirement for a video consisting of bitrate, picture size and frame rate based on the user's environmental resource limitations. All users can receive video with the specified quality (or near this quality) along a single delivery tree. The main characteristics of MTcast are in its scalability, high user satisfaction degree in received video quality, short startup latency and high robustness against node failure. Through simulations and experiments with our prototype implementation on PlanetLab, we have confirmed that MTcast can achieve practically high scalability and robustness, short startup latency and much higher user satisfaction than the layered multicast method.

Journal

  • IPSJ journal

    IPSJ journal 49(2), 568-578, 2008-02-15

    Information Processing Society of Japan (IPSJ)

References:  11

Cited by:  1

Codes

  • NII Article ID (NAID)
    110006613053
  • NII NACSIS-CAT ID (NCID)
    AN00116647
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1882-7764
  • NDL Article ID
    9381122
  • NDL Source Classification
    ZM13(科学技術--科学技術一般--データ処理・計算機)
  • NDL Call No.
    Z14-741
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IPSJ 
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