| Project/Area Number |
14350197
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
情報通信工学
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| Research Institution | TOKYO INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
SAKAI Yoshinori Tokyo Institute of Technology, Dept.of Communications and Integrated Systems, Professor, 大学院・理工学研究科, 教授 (70196054)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAOKA Katsunori Tokyo Institute of Technology, Dept.of Communications and Integrated Systems, Associate Professor, 大学院・理工学研究科, 助教授 (90262279)
KOBAYASHI Aki Tokyo Institute of Technology, Dept.of Communications and Integrated Systems, Assistant Professor, 大学院・理工学研究科, 助手 (30323801)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥14,200,000 (Direct Cost: ¥14,200,000)
Fiscal Year 2004: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2003: ¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2002: ¥6,500,000 (Direct Cost: ¥6,500,000)
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| Keywords | Content Delivery Network / Streaming / ARQ / Meta data / Internet / ストリーム伝送 / スケーリング / コンテンツ発見 / メタ情報 / キャッシング / 匿名課金 |
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| Research Abstract |
This research project aims at constructing a basic architecture of content based network, to provide a new CDN(Content Delivery Network) where content is stored and retrieved based on the metadata appended to each content. The research focuses on (1)developing a content retrieval method based on metadata, (2)developing a content delivery and storing algorithms based on metadata, (3)developing stream transmission method with low transmission delay, (4)developing charging system for content. The following results are obtained for 4 subjects. (1)We have developed a new probabilistic flooding technique to transmit query message and showed that the proposed technique can decrease the total amount of query message without decreasing retrieval error. (2)We have proposed a new meta data which describes history of content retrieval and showed that, by appending meta data to each content, each node in the network can maintain the appropriate content delivery mechanism considering the retrieval history of all contents. (3)We have developed a new ARQ mechanism for streaming packet where each node observes the packet loss and provides adaptive packet retransmission. It is shown that the proposed ARQ mechanism can decrease packet loss caused by retransmission delay. (4)We have developed a new anonymous charging protocol for content, where provider and retriever of the content does not have the knowledge each other.
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