すれ違い通信を活用した複数携帯電話端末による省電力協調動画ダウンロード手法  [in Japanese] Energy-aware Cooperative Download Method for Mobile Phones Utilizing Street Pass Communication  [in Japanese]

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Abstract

本論文では,携帯電話網の通信帯域節約を目的に,ユーザ端末間で同じコンテンツの一部(断片)をBluetoothやWi-Fiなどの近距離無線通信で送受信する協調ダウンロード手法を提案する.提案手法では,欲しい断片を持っている他の端末が近距離無線の通信範囲に入る時刻(遭遇時刻)を予測し,効率良く断片の取得を行う.さらに,端末の近距離無線通信による消費電力を抑えるため,遭遇時刻に基づいて決定する通信スケジュールに基づき,必要な時間だけ近距離無線通信デバイスを起動し,断片の取得を行う.また,提案手法では,受信期限までにコンテンツの取得を完了させるため,他の端末から取得できない断片は,携帯電話網から計画的にダウンロードする.シミュレーション実験により,提案手法は近距離無線デバイスをつねに起動し断片を集める方式とほぼ同数の断片を取得できる一方,端末の消費電力を10~30%削減できることを確認した.Aiming to reduce cellular network load, we propose a cooperative download method by which users' mobile phone terminals exchange fragments of a content (chunks) through short-range wireless communication like Bluetooth or Wi-Fi with other user terminals. Our basic idea is to predict contact time when other user terminals get within a range of short-range wireless communication and to obtain chunks efficiently from other user terminals. In addition, to reduce energy consumed by the short-range wireless communication device, each terminal turns off the device during unnecessary time. Furthermore, in order to complete downloading all requiring chunks by specified deadline, terminals aggressively use cellular network to download the chunks which they cannot obtain from other terminals. Through simulations, we confirmed that terminals using our method obtained from other terminals almost the same number of chunks with 10-30% less energy consumption than the conventional methods.

Aiming to reduce cellular network load, we propose a cooperative download method by which users' mobile phone terminals exchange fragments of a content (chunks) through short-range wireless communication like Bluetooth or Wi-Fi with other user terminals. Our basic idea is to predict contact time when other user terminals get within a range of short-range wireless communication and to obtain chunks efficiently from other user terminals. In addition, to reduce energy consumed by the short-range wireless communication device, each terminal turns off the device during unnecessary time. Furthermore, in order to complete downloading all requiring chunks by specified deadline, terminals aggressively use cellular network to download the chunks which they cannot obtain from other terminals. Through simulations, we confirmed that terminals using our method obtained from other terminals almost the same number of chunks with 10-30% less energy consumption than the conventional methods.

Journal

  • 情報処理学会論文誌

    情報処理学会論文誌 53(2), 783-794, 2012-02-15

    一般社団法人情報処理学会

Keywords

Codes

  • NII Article ID (NAID)
    110008767185
  • NII NACSIS-CAT ID (NCID)
    AN00116647
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    1882-7764
  • NDL Article ID
    024034008
  • NDL Call No.
    YH247-743
  • Data Source
    NDL  NII-ELS  IR  IPSJ 
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