JP2015520561A - ユーザ装置を割り振る方法、記憶媒体、eNodeB及びUE - Google Patents
ユーザ装置を割り振る方法、記憶媒体、eNodeB及びUE Download PDFInfo
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- JP2015520561A JP2015520561A JP2015511686A JP2015511686A JP2015520561A JP 2015520561 A JP2015520561 A JP 2015520561A JP 2015511686 A JP2015511686 A JP 2015511686A JP 2015511686 A JP2015511686 A JP 2015511686A JP 2015520561 A JP2015520561 A JP 2015520561A
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Abstract
Description
本願は2012年9月28日付で出願された米国出願第13/631,137号による優先的利益を享受し、その米国出願は2012年5月11日付けで出願された米国仮特許出願第61/646,223号による優先的利益を享受し、これらの出願の内容全体は本願のリファレンスに組み入れられる。
セル内のユーザ装置(UE)を、セル内で使用可能な2つ以上のエアインタフェースの間で割り振るために、セルを管理するエンハンストノードB(eNodeB)が実行する方法であって、
メジャーメント期間の間に、前記2つ以上のエアインタフェースのうちの少なくとも1つについて送信の予定を立てるステップと、
前記送信に基づいて、前記セル内のUEのオンタイムスループットのメトリックを評価するステップであって、前記オンタイムスループットは、遅延閾値に到達する前に、ターゲットビットレート以上速いビットレートで受信側に到着するデータ量の測定値である、ステップと、
前記メトリックが最大化するように、前記セルの前記2つ以上のエアインタフェースのうちのエアインタフェースを、前記セル内のUEに割り振るステップと
を有する方法である。
本願の発明者等は、「オンタイム(on-time)」スループットに関するメトリックを考慮し、統合された基地局でサポートされる複数のRATのうち何れかのRATをUEに割り振る方法及びシステム等を提供する課題に着目した。時間的制約があるユーザアプリケーションは、遅延に制約があるトラフィックのサービス品質(QoS)を劣化させない時間通りの形式でデータパケットを取得する。ところで、或るRATの場合には、例えば品質フィードバックインジケータやUEの負荷を検査することにより、オンタイムスループットメトリックを正確に決定できるかもしれないが、別のRATの場合には、オンタイムスループットメトリックを取得することが困難であるかもしれない。そこで、そのようなRATを利用するリンクについてオンタイムスループットを判別するメジャーメント方式が必要とされ、その場合、オンタイムスループットは実際の送信信号から導出される測定(結果)に基づいて推定することが可能であり、その送信信号の予定(スケジュール)は、統合された基地局により様々な基準に従って計画される。
以下の説明は、eNodeBにおいて統合された複数の無線アクセス技術(RAT)の間でUEを割り振るための基地局(エンハンストノードB、eNodeB、eNB)、ユーザ装置(UE)及び関連する方法を、当業者が生産又は使用できる程度に十分に提供される。本願で説明される方法及びシステムは、RATを選択するためにUEにより行われる技法及びeNodeBにより支援される技法を組み込み、オンタイムスループットが最大になるようにする。本願の実施形態で説明されるオンタイムスループット(on-time throughput)は、目標ビットレート以上大きなビットレートで遅延閾値を超える前に目的地又は受信側に到着するデータ量の測定結果である。説明されるシステム及び方法は、eNodeBにより管理されるセルの中でサポートされているRATに関するオンタイムスループットを評価する。「サポートされている」は「使用可能である」等と言及されてもよい。eNodeBは測定期間の予定又は計画を立て(スケジューリングし)、UE又はeNodeBは、それらの測定期間の間に生じた送信に基づいて、オンタイムスループットの推定値を生成してもよい。「測定期間」は「メジャーメント期間」等と言及されてもよい。
Ti=I(Ai≧R), i=1,...,m, m=M/D
ただし、Iはインジケータ関数である。
Claims (27)
- セル内のユーザ装置(UE)を、セル内で使用可能な2つ以上のエアインタフェースの間で割り振るために、セルを管理するエンハンストノードB(eNodeB)が実行する方法であって、
メジャーメント期間の間に、前記2つ以上のエアインタフェースのうちの少なくとも1つについて送信の予定を立てるステップと、
前記送信に基づいて、前記セル内のUEのオンタイムスループットのメトリックを評価するステップであって、前記オンタイムスループットは、遅延閾値に到達する前に、ターゲットビットレート以上速いビットレートで受信側に到着するデータ量の測定値である、ステップと、
前記メトリックが最大化するように、前記セルの前記2つ以上のエアインタフェースのうちのエアインタフェースを、前記セル内のUEに割り振るステップと
を有する方法。 - 前記メトリックが、前記セル内のUEに関する前記オンタイムスループットの合計である、請求項1に記載の方法。
- 前記送信がユーザデータの送信を含み、
前記eNodeBが前記送信を前記2つ以上のエアインタフェースの間で分ける、請求項1に記載の方法。 - 前記メトリックの評価値が、前記セル内のUEから受信される、請求項1に記載の方法。
- 前記メトリックの評価値が、前記メジャーメント期間の間に前記セル内のUEの送信を監視することで、前記eNodeBにより決定される、請求項1に記載の方法。
- 更新評価メジャーメント手順が、前記セル内のUEからの要求に応じて引き起こされる、請求項1に記載の方法。
- 前記UEは、前記オンタイムスループットが閾値を超えて劣化したことを前記UEが判断したことに基づいて、前記更新評価メジャーメント手順を引き起こす、請求項6に記載の方法。
- 前記メジャーメント期間は、前記NodeBにより周期的に起算される、請求項1に記載の方法。
- 前記オンタイムスループットが閾値を超えて劣化したことを前記eNodeBが判断したことに基づいて、前記メジャーメント期間が前記eNodeBにより起算される、請求項1に記載の方法。
- 前記評価するステップが、
前記メジャーメント期間を2つ以上のセグメントに分割するステップと、
前記2つ以上のセグメントについて測定されたスループットを、ターゲットビットレートと比較するステップと、
比較の結果に基づいて前記2つ以上のセグメントに値を指定するステップと、
前記2つ以上のセグメントに対応する値に基づいて、前記オンタイムスループットのメトリックを評価するステップと
を有する、請求項1に記載の方法。 - 前記メジャーメント期間は、前記2つ以上のエアインタフェースのうちの少なくとも1つにおいて送信を行うアプリケーションが許容可能な遅延量に基づいて決定される、請求項1に記載の方法。
- 前記2つ以上のエアインタフェースが、Wi−Fiエアインタフェース、LTEエアインタフェース、又はWiMaxインタフェースを含む、請求項1に記載の方法。
- コンピュータが読み取ることが可能な記憶媒体であって、方法をコンピュータに実行させる命令を記憶し、前記方法は、
メジャーメント期間の間に、セル内のオンタイムスループットのメトリックを評価するステップであって、前記オンタイムスループットは、遅延閾値に到達する前に、ターゲットビットレート以上速いビットレートで受信側に到着するデータ量の測定値である、ステップと、
前記セル内で前記メトリックを最大化するように、前記セル内で使用可能な2つ以上のエアインタフェースのうちのエアインタフェースを選択するステップと、
前記選択の内容を、前記セルを管理するエンハンストノードB(eNodeB)に通知するステップと
を有する記憶媒体。 - 前記方法において、前記2つ以上のエアインタフェースのうち、最高のオンタイムスループットをもたらすエアインタフェースを選択する、請求項13に記載の記憶媒体。
- 2つ以上のメジャーメント期間について評価されたオンタイムスループットを評価するステップと、
前記2つ以上のメジャーメント期間の各々に関し、最高のオンタイムスループットをもたらすエアインタフェースを選択するステップと
を更に有する、請求項13に記載の記憶媒体。 - エンハンストノードB(eNodeB)であって、
前記eNodeBにより管理されるセル内のユーザと通信し、関連するユーザをコアネットワークに接続する第1のエアインタフェースと、
前記eNodeBにより管理されるセル内のユーザと通信し、関連するユーザをコアネットワークに接続する第2のエアインタフェースと、
1つ以上のプロセッサと
を有し、前記1つ以上のプロセッサは、
2つ以上のエアインタフェースのうちの少なくとも1つについて送信の予定を立てる処理と、
前記セル内のオンタイムスループットを最大化するように、前記セルの前記2つ以上のエアインタフェースのうちのエアインタフェースを、前記セル内のUEに割り振る処理であって、前記オンタイムスループットは、遅延閾値に到達する前に、ターゲットビットレート以上速いビットレートで受信側に到着するデータ量の測定値である、処理と
を実行するように形成されている、eNodeB。 - 前記プロセッサは、メジャーメント期間の間に前記送信に基づいて、前記セル内のUEのオンタイムスループットのメトリックを評価するように形成されており、前記オンタイムスループットは、遅延閾値に到達する前に、ターゲットビットレート以上速いビットレートで受信側に到着するデータ量の測定値である、請求項16に記載のeNodeB。
- 前記第1のエアインタフェース及び前記第2のエアインタフェースのうちの一方が、前記セル内のUEから前記オンタイムスループットのメトリックの評価値を受信するように形成されている、請求項16に記載のeNodeB。
- 前記プロセッサは、前記2つ以上のエアインタフェースの間で、送信するデータを分割し、前記データはテストデータ又はユーザデータである、請求項16に記載のeNodeB。
- 前記オンタイムスループットが閾値を超えて劣化したことを前記UEが判断したことに基づいて、更新評価メジャーメント手順が、前記セル内のUEにより引き起こされる、請求項16に記載のeNodeB。
- 前記プロセッサは、
メジャーメント期間を2つ以上のセグメントに分割し、
前記2つ以上のセグメントについて測定されたスループットをターゲットビットレートと比較し、
比較の結果に基づいて前記2つ以上のセグメントに値を指定し、
前記2つ以上のセグメントに対応する値に基づいて、前記オンタイムスループットのメトリックを評価する、請求項16に記載のeNodeB。 - 前記プロセッサは、前記第1のエアインタフェース及び前記第2のエアインタフェースのうちの少なくとも1つにおいて送信を行うアプリケーションが許容可能な遅延量に基づいて、メジャーメント期間を設定するように形成されている、請求項16に記載のeNodeB。
- 無線通信ネットワークのセル内で動作するユーザ装置(UE)であって、
第1のエアインタフェースにより通信を行うように形成された第1の通信モジュールと、
第2のエアインタフェースにより通信を行うように形成された第2の通信モジュールと、
プロセッサと
を有し、前記プロセッサは、
前記セル内でオンタイムスループットを最大化するように、前記2つ以上のエアインタフェースのうちのエアインタフェースを選択する処理であって、前記オンタイムスループットは、遅延閾値に到達する前に、ターゲットビットレート以上速いビットレートで受信側に到着するデータ量の測定値である、処理と、
前記選択の内容を、前記セルを管理するエンハンストノードB(eNodeB)に通知する処理と、
前記オンタイムスループットが劣化した旨の判断に基づいて、前記2つ以上のエアインタフェースのうちの少なくとも1つにおいてテスト送信が予定されるように要求する処理と
を実行するように形成されている、UE。 - 前記プロセッサが、
前記セル内の前記オンタイムスループットのメトリックを評価し、
前記メトリックを前記eNodeBに送信するように形成されている、請求項23に記載のUE。 - 前記プロセッサは、少なくとも2つのメジャーメント期間に関し、最高のオンタイムスループットをもたら2つ以上のエアインタフェースのうちのエアインタフェースを選択するように形成されている、請求項23に記載のUE。
- コンピュータにより読み取ることが可能な少なくとも1つの記憶媒体であって、請求項1〜12のうち何れか1項に記載の方法をeNodeBに実行させる命令を記憶する、記憶媒体。
- 無線通信ネットワークのセル内で動作するために、請求項13〜15の何れか1項に記載の処理をユーザ装置(UE)が実行する方法。
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CN104285494B (zh) | 2018-10-02 |
US20130301435A1 (en) | 2013-11-14 |
WO2013169991A1 (en) | 2013-11-14 |
ES2646000T3 (es) | 2017-12-11 |
JP5917770B2 (ja) | 2016-05-18 |
US8953482B2 (en) | 2015-02-10 |
EP2848072B1 (en) | 2017-09-20 |
CN104285494A (zh) | 2015-01-14 |
EP2848072A4 (en) | 2016-01-13 |
EP2848072A1 (en) | 2015-03-18 |
HUE034882T2 (hu) | 2018-03-28 |
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