ユビキタス環境における端末の位置情報に基づくP2Pネットワーク  [in Japanese] A Location-based Peer-to-Peer Network in a Ubiquitous Environment  [in Japanese]

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Abstract

近年,携帯端末の普及やセンサ技術の発展にともない,場所や時間に依存せずに遍在する情報を利用できるユビキタス環境が整いつつある.ユビキタス環境では,場所や時間などの状況を自動的に考慮して人々の意思決定を支援するコンテキストアウェアサービスが実現できる.多くの場合,人々は行動を起こす際に自分や各種施設の位置を考慮するため,コンテキストアウェアサービスでは任意の位置に存在する情報資源を効率良く検索できる機構が重要となる.そこで本研究では端末の位置情報に基づくP2P ネットワークであるLL-Net(Location-based Logical Network)を提案する.LL-Net では緯度,経度によって物理領域を格子状のエリアに分割する.各端末はエリア内でネットワークを構築し,またエリアを階層的にとらえてエリア間にリンクを構築する.これにより,LL-Netはクエリをフラッディングする範囲を任意の領域のみに制限できる.また本研究ではシミュレーションによって,LL-Net が任意の領域へ効率良くクエリを転送できることを示す.With the popularization of mobile devices and the development of advanced sensor devices, it is becoming feasible to realize a ubiquitous environment that enables us to publish and utilize information independent of location and time. In a ubiquitous environment, a number of context-aware services will be developed which provide services depending on various contexts such as location and time. It is indispensable for such services to retrieve locationdependent information efficiently. In this paper, we propose a location-based P2P network called the LL-Net (Location-based Logical Network). The LL-Net divides the world into areas by latitude and longitude. Terminals in each area construct an intra-area network, and each terminal establishes inter-area links hierarchically. By constructing such a network, the LL-Net can limit the message flooding range only to a specified region. The simulation results show that the LL-Net can efficiently propagate a query to a specified region compared to the existing P2P networks.

With the popularization of mobile devices and the development of advanced sensor devices, it is becoming feasible to realize a ubiquitous environment that enables us to publish and utilize information independent of location and time. In a ubiquitous environment, a number of context-aware services will be developed which provide services depending on various contexts such as location and time. It is indispensable for such services to retrieve location-dependent information efficiently. In this paper, we propose a location-based P2P network called the LL-Net (Location-based Logical Network). The LL-Net divides the world into areas by latitude and longitude. Terminals in each area construct an intra-area network, and each terminal establishes inter-area links hierarchically. By constructing such a network, the LL-Net can limit the message flooding range only to a specified region. The simulation results show that the LL-Net can efficiently propagate a query to a specified region compared to the existing P2P networks.

Journal

  • 情報処理学会論文誌データベース(TOD)

    情報処理学会論文誌データベース(TOD) 46(SIG18(TOD28)), 1-15, 2005-12-15

    Information Processing Society of Japan (IPSJ)

References:  17

Cited by:  17

Codes

  • NII Article ID (NAID)
    110002977724
  • NII NACSIS-CAT ID (NCID)
    AA11464847
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1882-7799
  • NDL Article ID
    7777873
  • NDL Call No.
    Z74-C192
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IPSJ 
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