JP2012133792A - 適応型ファイル配信システムおよび方法 - Google Patents
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Abstract
【解決手段】適応型ファイル配信システムおよび方法は、データファイルをセグメントで伝送し、各セグメントを異なる期間中に伝送する。各期間には、それに関連するファイルセグメントを伝送する伝送部分と、伝送されたセグメントに関してこれ以上ネットワークとやりとりが発生しない待機部分とがある。いくつかの実施例では、各期間の伝送部分の長さは、定常状態スループット条件に到達するのに十分であり、これによりファイルセグメント伝送の速度測定からネットワークまたはネットワーク群のトラフィック負荷状態を測定することが可能となる。
【選択図】図2
Description
(1) Rmin_j=Xrem_j/(Td−Tnow_j−Tunaval_j)。
Rmax_j=Rmin_j+Rcap/Q_j−Sum(Rmin)_j/Q_j。
(2a) Rmax_j=H(R_(j−1))*Rmax_j
ここで方程式2a右側のRmax_jは、上記の方程式2で算出されたものであり、またここでR_(j−1)は、先に送信されたセグメントの実測速度、あるいはそれが第1のセグメントの場合ゼロである。例えば、
(2b) H(R_(j−1))=(R_(j−1))/Rpeak)**n、でありn=2、3、……
ここでRpeakは、所与の受信システム104に対して一貫して許容された最大値であり、例えば、受信システムのネットワーク106によって執り行われる。方程式2bに見られるような測定速度Rへの他の関数従属や他の混雑検出メトリクスも可能であり、ネットワーク106のオペレータによる時間帯別設定プロファイル、ネットワーク106の混雑検出エージェントのフィードバック、などを含む。
R_j=X_j/dT_j。
W_j=X_j/[R_j]−X_j/R_j。
X_j+1=R_j*Tss。
Claims (24)
- ファイルの残り部分のファイルセグメントを転送するための最低転送速度を、前記ファイルの残り部分として判定されたサイズおよび前記ファイルの残り部分の転送に利用可能な時間の長さに一部基づいて決定するステップと、
前記ファイルの残り部分のファイルセグメントを転送するための最高転送速度を、前記最低転送速度および送信システムの最高転送容量に一部基づいて決定するステップと、
前記ファイルの残り部分のファイルセグメントを、前記送信システムから受信システムへと送信するステップと、
前記ファイルセグメントが前記送信システムから前記受信システムへと送信された実転送速度を、前記ファイルセグメントのサイズおよび前記ファイルセグメントが前記送信システムから送信された時と前記ファイルセグメントが前記受信システムで受信された時の間の経過時間に一部基づいて決定するステップと、
待機期間を、前記最高転送速度、前記最低転送速度、および前記実転送速度に一部基づいて決定するステップと、
前記受信システムで前記ファイルセグメントを受信した後、前記受信システムから前記送信システムへと、前記受信システムによる前記ファイルセグメントの受信を確認する肯定応答メッセージを送信するまで前記待機期間を待機するステップと、
前記受信システムから前記送信システムへと前記肯定応答メッセージを送信するステップと、
を含むことを特徴とする方法。 - 前記肯定応答メッセージがさらに、前記ファイルセグメントの実転送速度の値を含むことを特徴とする請求項1記載の方法。
- 前記肯定応答メッセージがさらに、前記実転送速度および前記待機期間に基づくファイルセグメントの有効転送速度の値を含むことを特徴とする請求項2記載の方法。
- 前記待機期間を決定するステップがさらに、ネットワーク混雑およびネットワーク活動の少なくとも1つに一部基づくものであることを特徴とする請求項1記載の方法。
- 前記ネットワーク混雑および前記ネットワーク活動は、前記送信システムおよび前記受信システム以外のシステムによって判定されることを特徴とする請求項4記載の方法。
- 前記送信システムから前記受信システムへと前記最低転送速度および前記最高転送速度を送信するステップをさらに含むことを特徴とする請求項1記載の方法。
- 前記ファイルの残り部分のファイルセグメントを転送するための最高転送速度を決定するステップがさらに、前記送信システムを前記受信システムに通信可能にリンクするネットワークのスループット測定および混雑測定の少なくとも1つに一部基づくものであることを特徴とする請求項1記載の方法。
- 前記ファイルの残り部分のファイルセグメントを転送するための最高転送速度を決定するステップがさらに、複数の時間順設定プロファイルに一部基づくものであることを特徴とする請求項1記載の方法。
- 前記ファイルの残り部分のファイルセグメントを転送するための最高転送速度を決定するステップがさらに、少なくとも先に送信されたファイルセグメントの実転送速度に一部基づくものであることを特徴とする請求項1記載の方法。
- 過去の転送の履歴記録に一部基づいて、前記ファイルの残り部分の転送に利用可能な時間の長さを決定するステップをさらに含むことを特徴とする請求項1記載の方法。
- 設定プロファイルに基づく時間に一部基づき、前記ファイルの残り部分の転送に利用可能な有用時間の長さを決定するステップをさらに含む請求項1記載の方法。
- 送信システムから受信システムへ複数のファイルセグメントからなるファイルの一部を送信するステップであって、各伝送後に生じる様々な複数の待機期間の1つの時間だけ間隔を空けた複数の伝送によって前記ファイルセグメントを送信することを含むステップと、
各ファイルセグメント伝送に関して、前記ファイルセグメントが前記送信システムから前記受信システムへと送信された実転送速度を決定するステップと、
各前記ファイルセグメント伝送に関して、前記ファイルセグメント伝送に関して決定された実転送速度に一部基づき、伝送直後に生じる前記待機期間を決定するステップと、
を含むことを特徴とする方法。 - 送信システムから受信システムへ複数のファイルセグメントからなるファイルの一部を送信するステップであって、各伝送後に生じる様々な複数の待機期間の1つを伴う複数の伝送によって、前記ファイルセグメントを1つずつ送信することを含むステップと、
各ファイルセグメント伝送に関して、前記ファイルセグメントが前記送信システムから前記受信システムへと送信された実転送速度を決定するステップと、
先行するファイルセグメント伝送を有する各ファイルセグメント伝送に関して、前記先行するファイルセグメント伝送の実転送速度に一部基づき、前記ファイルセグメント伝送で送信されるべきファイルセグメントのサイズを決定するステップと、
を含むことを特徴とする方法。 - 送信システムから受信システムへ複数のファイルセグメントからなるファイルを配信期限までに送信するステップであって、各伝送後に生じる様々な複数の待機期間の1つの時間だけ間隔を空けた複数の伝送によって前記ファイルセグメントを送信することを含むステップと、
各ファイルセグメント伝送に関して、前記ファイルセグメントが前記送信システムから前記受信システムへと送信された実転送速度を決定するステップと、
各ファイルセグメント伝送に関して、前記ファイルセグメント伝送に関して決定された実転送速度に一部基づき、且つ前記配信期限に一部基づき、伝送直後に生じる前記待機期間を決定するステップと、
を含むことを特徴とする方法。 - 前記配信期限が要求されることを特徴とする請求項14記載の方法。
- 前記配信期限が計算されることを特徴とする請求項14記載の方法。
- 配信期限までに受信システムによって受信される、複数のファイルセグメントからなるファイルを、送信システムから受信システムへ複数時間かけて送信するステップと、
各ファイルセグメント伝送に関して、前記ファイルセグメントが前記送信システムから前記受信システムへと送信された実転送速度を決定し、
各前記ファイルセグメント伝送に関して、前記ファイルセグメント伝送に関して決定された実転送速度に一部基づき、前記ファイルセグメント伝送に関する有効伝送速度を決定することからなる方法。 - 受信システムからの要求以外の開始に基づいて前記受信システムへと送信される、複数のファイルセグメントからなる要求されていない2次的ファイルを、送信システムから前記受信システムへ数時間かけて送信するステップと、
前記受信システムが前記要求されていない2次的ファイルを受信した後に、前記受信システムによって再生される、前記受信システムへ配信されることが前記受信システムによって要求された要求ファイルの一部の再生に連続して、前記要求されていない2次的ファイルを前記受信システムで再生するステップと、
を含むことを特徴とする方法。 - 各々が公開日前の送信システムから複数の受信システムへの複数のファイルセグメントからなる、暗号化ファイルの複数のコピーを送信するステップと、
前記公開日前には、前記複数の受信システムによって受信された複数のコピーの解読を許可しないステップと、
前記公開日に、前記複数の受信システムによって受信された複数のコピーの解読を許可するするステップと、
を含むことを特徴とする方法。 - 注文後の少なくとも第1の複数時間に生じる配信期限までに配信されるようにファイルを注文するステップと、
少なくとも第2の複数時間の期間で、配信期限までに配信されるべき前記ファイルをファイルセグメントごとに電子配信するステップと、
前記ファイル受信後に前記ファイルを再生するステップと、
を含むことを特徴とする方法。 - サービスプロバイダネットワークの顧客へとファイルを送信することを、前記顧客および前記サービスプロバイダネットワークのオペレータ以外の構成員を含み、前記サービスプロバイダネットワークのネットワークトラフィックに重大な影響を与えることなく前記顧客へと前記ファイルを送信することが不可能である第三者に申し出るステップと、
前記第三者の要求により、前記サービスプロバイダネットワークのネットワークトラフィックに重大な影響を与えることなく前記サービスプロバイダネットワークの顧客へと前記ファイルを送信するステップと、
前記サービスプロバイダネットワークの顧客へと前記ファイルを送信したことについて前記第三者から支払いを受けるステップと、
を含むことを特徴とする方法。 - 受信システム製造時に該受信システムへと第1のファイル群を読み込み、
前記受信システム製造時の後に、第2のファイル群を前記受信システムへと電子配信するステップであって、前記ファイル群の少なくとも1つは複数時間をかけて送信されるステップと、
前記受信システムによる前記ファイル群の1つの再生のために、前記第1のファイル群へのアクセスを可能とするステップと、
を含むことを特徴とする方法。 - 第1の配信期限までに電子配信されるべきファイルの配信期限を遠隔調査するステップと、
前記第1の配信期限を第2の配信期限へと遠隔修正するステップと、
少なくとも第3の複数日数の期間で、前記第2の配信期限までに配信されるべきファイルをファイルセグメントごとに配信するステップと、
を含むことを特徴とする方法。 - 前記第1の配信期限を遠隔修正するステップは、複数のファイル配信のための複数の配信期限の順序付けにおいて前記第1の配信期限の位置を修正するステップを含むことを特徴とする請求項23記載の方法。
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