JP5954647B2 - エネルギー、移動度および容量について最適化されている、サポートされた自己最適化無線ネットワーク - Google Patents
エネルギー、移動度および容量について最適化されている、サポートされた自己最適化無線ネットワーク Download PDFInfo
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Description
本開示において記載する例が一般的であるという重要な意思表示として、第3世代パートナーシッププロジェクト(3GPP)ロングタームエボリューション(LTE)規格の用語を本明細書全体で多用するが、限定を意図したものではなく、この点をさらに伝えるべく本明細書の一部ではより一般的な用語を利用するという例外もある。
最初に技術の例について概論を以下で述べた後、技術の具体的な例をさらに詳細に説明する。最初に記載する要約は、技術をより簡単に理解していただくためのものであるが、技術の重要な特徴または不可欠な特徴を特定することを意図したものではなく、請求対象の主題の範囲を限定することを意図したものでもない。
[項目1]
エボルブドNodeB(eNodeB)およびエボルブドパケットコア(EPC)内に位置するオペレーションアンドメインテナンスモジュール(O&Mモジュール)のうち少なくとも一方に存在する、無線通信システムにおいて移動度オーバーヘッドと複数の負荷要件との間のバランスを取るためのデバイスであって、
一連の複数の送信セルについて、高移動度セル識別情報(Cell−ID)設定(高移動度Cell−ID設定)および高負荷容量Cell−ID設定のうち一方を選択する選択モジュールと、
前記選択モジュールと通信している設定モジュールであって、移動度オーバーヘッドを低減するべく、一の共通Cell−IDを持つ単一周波数ネットワーク(SFN)を持つ前記高移動度Cell−ID設定において動作するように前記一連の複数の送信セルを設定し、負荷が増加したためにスペクトル効率を改善するべく、複数の異なるCell−IDを持つ複数の送信セルを持つ前記高負荷容量Cell−ID設定において動作するように前記一連の複数の送信セルを設定する設定モジュールと
を備えるデバイス。
[項目2]
前記選択モジュールと通信する速度測定モジュール
をさらに備え、
前記速度測定モジュールは、
前記一連の複数の送信セルについての選択されたカバレッジエリア内の一連の複数のユーザイクイップメント(複数のUE)について少なくとも1回の速度測定を実行し、
前記少なくとも1回の速度測定を前記選択モジュールに通信する
項目1に記載のデバイス。
[項目3]
前記選択モジュールは、前記一連の複数の送信セルについて、前記高移動度Cell−ID設定および前記高負荷容量Cell−ID設定のうち一方を選択するべく、負荷情報および前記少なくとも1回の速度測定のうち少なくとも1つを利用する項目2に記載のデバイス。
[項目4]
前記選択モジュールは、前記一連の複数の送信セルについて、設定閾値に対して相対的な合計値に基づいて、前記高移動度Cell−ID設定および前記高負荷容量Cell−ID設定のうち一方を選択し、
前記合計値は、複数の重み付け速度値および複数の重み付け負荷値を含み、
前記複数の重み付け速度値が高くなると、前記設定閾値に対して相対的に、前記高移動度Cell−ID設定を示す複数の値に前記合計値が近くなり、
前記複数の重み付け負荷値が高くなると、前記設定閾値に対して相対的に、前記高負荷容量Cell−ID設定を示す複数の値に前記合計値が近くなる項目3に記載のデバイス。
[項目5]
前記一連の複数の送信セルの選択されたカバレッジエリアは、車両の交通および鉄道の運行のうち少なくとも一方について設計された主要経路の長さにわたって広がる項目1から4の何れか1項に記載のデバイス。
[項目6]
前記選択モジュールは、前記高移動度Cell−ID設定および前記高負荷容量Cell−ID設定のうち一方を選択するべく、時刻情報、曜日情報、休日情報およびイベント情報のうち少なくとも1つを利用する項目1から5の何れか1項に記載のデバイス。
[項目7]
複数の送信セルから少なくとも1回の速度測定および負荷情報のうち少なくとも一方を受信し、
一の所与の送信セルを前記一連の複数の送信セルに含めることによって前記一連の複数の送信セルを編集する
形成モジュールをさらに備え、
前記一の所与の送信セルは、前記一連の複数の送信セルに既に含まれている送信セルに隣接しており、前記少なくとも1回の速度測定および前記負荷情報のうち少なくとも一方は、前記一連の複数の送信セルについて予め定められている範囲内の対応する一連の複数の値を持つ項目1から6の何れか1項に記載のデバイス。
[項目8]
複数の未設定のCell−IDについての一連の複数のチャネル状態情報基準信号(CSI−RS)を前記一連の複数の送信セルの選択されたカバレッジエリア内の複数のユーザイクイップメント(複数のUE)に送信し、
前記一連の複数のCSI−RSに基づいて前記複数のUEから一連の複数の測定を受信し、前記一連の複数の測定は、前記複数のUEのハンドオーバーを支援するべく利用され、前記選択モジュールは、高移動度Cell−ID設定から高負荷容量Cell−ID設定へと選択を変化させる
測定モジュールをさらに備える
項目1から7の何れか1項に記載のデバイス。
[項目9]
一の共通セル識別情報(Cell_ID)を持つ単一周波数ネットワーク(SFN)を形成するための方法をコンピュータに実行させるためのプログラムであって、
前記方法は、
エボルブドパケットコア(EPC)内のオペレーションアンドメインテナンスモジュール(O&Mモジュール)およびエボルブドNodeB(eNodeB)のうち一方において、選択されたカバレッジエリア内の一連の複数の送信セルについて負荷情報を取得する段階と、
前記負荷情報に基づいて前記選択されたカバレッジエリアをカバーする無線アクセスネットワーク(RAN)において減数された一連の複数の送信セルを選択する段階と、
より少ない送信セルを持つ前記選択されたカバレッジエリアをカバーすることを目的として、前記減数された一連の複数の送信セルのカバレッジエリアを拡張するべく、前記RAN内の前記減数された一連の複数の送信セルを一の共通Cell−IDを持つSFNに再設定する段階と
備えるプログラム。
[項目10]
前記方法はさらに、
未設定の共通Cell−IDについてのチャネル状態情報基準信号(CSI−RS)を前記選択されたカバレッジエリア内の複数のユーザイクイップメント(複数のUE)に送信する段階と、
前記CSI−RSに基づき、前記複数のUEから一連の複数の測定を受信する段階と、
前記減数された一連の複数の送信セルを選択するべく、そして、前記減数された一連の複数の送信セルが、前記一の共通Cell−IDで設定された後、前記選択されたカバレッジエリアについてカバレッジを維持する旨を決定するべく、前記一連の複数の測定を利用する段階と
を備える項目9に記載のプログラム。
[項目11]
前記方法は、トラフィック負荷が少ない複数の隣接する送信セルを前記一連の送信セルに含めることによって、前記一連の複数の送信セルを最初に編集する段階をさらに備える項目9または10に記載のプログラム。
[項目12]
前記負荷情報は、少なくとも1つのS1トランスポートネットワークレイヤ負荷および少なくとも1つの相対狭帯域送信電力メッセージ(RNTPメッセージ)のうち一方から取得され、前記RNTPメッセージは、X2接続を介して、複数の送信セル間で通信される項目9から11の何れか1項に記載のプログラム。
[項目13]
前記減数された一連の複数の送信セルを、前記一の共通Cell−IDを持つ前記SFNへと再設定した後に結果として発生するカバレッジのシナリオについてのカバレッジエリアを最適化するべく、アンテナ傾斜を調整する段階を
さらに備える
項目9から12の何れか1項に記載のプログラム。
[項目14]
前記方法は、
前記負荷情報に基づき、少なくとも1つの追加の送信セルが、前記選択されたカバレッジエリア内の増加したトラフィック負荷のためにスペクトル効率を上げることによって、前記選択されたカバレッジエリア内の前記増加したトラフィック負荷の処理を改善すると決定する段階と、
少なくとも1つの新しいCell−IDで前記少なくとも1つの追加の送信セルを再設定する段階と、
前記少なくとも1つの追加の送信セルに対して少なくとも1つのUEについての再割り当てを実行する段階と
をさらに備える項目9から13の何れか1項に記載のプログラム。
[項目15]
前記方法は、
前記少なくとも1つの追加の送信セルを決定するべく、少なくとも1つのCSI−RSを利用した測定を要求する段階と、
前記少なくとも1つの追加の送信セルが少なくとも1つの新しいCell−IDで再設定された後に、前記少なくとも1つの新しいCell−IDについてチャネル情報を提供するべく、少なくとも1つのCSI−RSを利用した測定を要求する段階と
さらに備え、
前記少なくとも1つのCSI−RSを利用した測定のためのCSI−RSは、未設定のCell−IDに相関付けられる情報を搬送する
項目14に記載のプログラム。
[項目16]
複数の未設定のセル識別情報(Cell−ID)について複数のチャネル状態情報基準信号(CSI−RS)を実現するための方法であって、
エボルブドパケットコア(EPC)内に配置されているオペレーションアンドメインテナンスモジュール(O&Mモジュール)およびeNodeBのうち少なくとも一方によって、一連の複数の送信セルによって共有されるべき未設定のCell−IDについてのCSI−RSの識別情報を一連の複数のユーザイクイップメント(UE)に提供する段階と、
前記一連の複数のUEのうち少なくとも1つのUEによる前記CSI−RSの測定を、前記未設定のCell−IDおよび前記一連の複数の送信セルで特定させるべく、前記CSI−RSを前記識別情報に埋め込む段階と、
前記測定に基づき前記一連の複数の送信セルに対して再設定処理を実行する段階と
を備える
方法。
[項目17]
前記再設定処理を実行する段階はさらに、
前記一連の複数のUEから複数の測定を受信する段階と、
前記複数の測定に基づき、一の共通Cell−IDを持つ潜在的な新しい単一周波数ネットワーク(SFN)について潜在的なカバレッジエリアを推定する段階と
を有し、
前記一連の複数の送信セルの少なくとも一部は、前記潜在的な新しいSFNについて指定されている項目16に記載の方法。
[項目18]
前記再設定処理を実行する段階はさらに、
前記一連の複数のUEから複数の測定を受信する段階と、
前記複数の測定に基づき、少なくとも1つの新しいCell−IDについて、前記一連の複数の送信セルのうち少なくとも1つのターゲット送信セルを決定する段階と
を有する項目16または17に記載の方法。
[項目19]
前記CSI−RSを前記識別情報に埋め込む段階はさらに、
識別値を前記未設定のCell−IDに割り当てる段階と、
前記未設定のCell−IDを特定する前記CSI−RSのための疑似ランダムシーケンスを生成するべく、Cell−ID値に代えて前記識別値を利用する段階と、
を有する項目16から18の何れか1項に記載の方法。
[項目20]
前記識別情報は、前記CSI−RSの初期化部分に埋め込まれる
項目16から19の何れか1項に記載の方法。
[項目21]
前記識別情報を前記一連の複数のUEに提供する段階はさらに、
リモート無線制御(RRC)ブロードキャスティングを用いて、前記未設定のCell−IDがカバーする地理的エリアに前記識別情報をブロードキャストする段階を
を有する
項目16から20の何れか1項に記載の方法。
[項目22]
複数のユーザイクイップメント(複数のUE)を、新しいセル識別情報(Cell_ID)で再設定する予定の一連の複数の送信セルに接続するエボルブドNodeB(eNodeB)であって、
新しいCell−IDを共有するように再設定する一連の複数の送信セルを選択し、
前記一連の複数の送信セルが前記新しいCell−IDで再設定される場合、前記一連の複数の送信セルに接続するべく前記複数のUEが利用するオーバーヘッドを低減することを目的として、前記一連の複数の送信セルに対応付けられている複数のUEに再設定メッセージを送信する
コンピュータ回路を備え、
前記再設定メッセージは、ハンドオーバー手順を含まないプロセスおよびグループハンドオーバー手順のプロセスのうち一方によって、前記新しいCell−IDを持つ前記一連の複数の送信セルに前記複数のUEを接続させるための情報を搬送する
eNodeB。
[項目23]
前記再設定メッセージは、
前記新しいCell−IDが有効になり、前記複数のUEが前記新しいCell−IDを持つ前記一連の複数の送信セルに再接続されるタイミングまで、前記再設定メッセージを受信する前記複数のUEによるデータの送受信を停止させるべく、
送信を停止させるための前記複数のUEに対する指示と、
前記新しいCell−IDの値と、
前記新しいCell−IDが有効になる対応するタイミングと
を含む項目22に記載のeNodeB。
[項目24]
前記再設定メッセージは、マルチキャストシグナリングを用いて前記複数のUEに送信された共通ハンドオーバーコマンドメッセージを含み、
前記共通ハンドオーバーコマンドは、前記新しいCell−IDを持つ再設定後の前記一連の複数の送信セルへのハンドオーバーを、前記複数のUEについて実行するために用いられる複数のパラメータを提供する項目22または23に記載のeNodeB。
[項目25]
前記コンピュータ回路はさらに、前記一連の複数の送信セルに対応付けられている前記複数のUEについてハンドオーバー遅延を特定する異なるハンドオーバーコマンドを送信する項目24に記載のeNodeB。
[項目26]
前記共通ハンドオーバーコマンドメッセージは、少なくとも1つのセル無線ネットワーク一時的識別子(C−RNTI)および少なくとも1つのターゲット送信セルセキュリティアルゴリズム識別子を含む項目24または25に記載のeNodeB。
[項目27]
前記共通ハンドオーバーコマンドメッセージは、専用無線アクセスチャネル(RACH)およびターゲットeNodeBシステム情報のうち少なくとも一方を含む項目24から26の何れか1項に記載のeNodeB。
[項目28]
前記コンピュータ回路はさらに、前記一連の複数の送信セルのうち一の再設定された送信セルに隣接する少なくとも1つの隣接送信セルに通知メッセージを提供し、
前記通知メッセージは、
元のCell−IDと、
再設定後のCell−IDと、
前記再設定されたCell−IDが前記再設定された送信セルについて有効になるタイミングに関する情報と
を含む項目22から27の何れか1項に記載のeNodeB。
[項目29]
前記再設定メッセージは、前記新しいCell−IDが有効になるタイミングが、次のシステム情報ブロック(SIB)変更期間内である旨を示す項目22から28の何れか1項に記載のeNodeB。
Claims (16)
- エボルブドNodeB(eNodeB)およびエボルブドパケットコア(EPC)内に位置するオペレーションアンドメインテナンスモジュール(O&Mモジュール)のうち少なくとも一方に存在する、無線通信システムにおいて移動度オーバーヘッドと複数の負荷要件との間のバランスを取るためのデバイスであって、
一連の複数の送信セルについて、設定閾値に対して相対的な合計値に基づいて、高移動度セル識別情報(Cell−ID)設定(高移動度Cell−ID設定)および高負荷容量Cell−ID設定のうち一方を選択する選択モジュールと、
前記選択モジュールと通信している設定モジュールであって、移動度オーバーヘッドを低減するべく、一の共通Cell−IDを持つ単一周波数ネットワーク(SFN)を持つ前記高移動度Cell−ID設定において動作するように前記一連の複数の送信セルを設定し、負荷が増加したためにスペクトル効率を改善するべく、複数の異なるCell−IDを持つ複数の送信セルを持つ前記高負荷容量Cell−ID設定において動作するように前記一連の複数の送信セルを設定する設定モジュールと
を備え、
前記合計値は、複数の重み付け速度値および複数の重み付け負荷値を含み、
前記複数の重み付け速度値が高くなると、前記設定閾値に対して相対的に、前記高移動度Cell−ID設定を示す複数の値に前記合計値が近くなり、
前記複数の重み付け負荷値が高くなると、前記設定閾値に対して相対的に、前記高負荷容量Cell−ID設定を示す複数の値に前記合計値が近くなる、デバイス。 - 前記選択モジュールと通信する速度測定モジュール
をさらに備え、
前記速度測定モジュールは、
前記一連の複数の送信セルについての選択されたカバレッジエリア内の一連の複数のユーザイクイップメント(複数のUE)について少なくとも1回の速度測定を実行し、
前記少なくとも1回の速度測定を前記選択モジュールに通信する
請求項1に記載のデバイス。 - 前記選択モジュールは、前記一連の複数の送信セルについて、前記高移動度Cell−ID設定および前記高負荷容量Cell−ID設定のうち一方を選択するべく、負荷情報および前記少なくとも1回の速度測定のうち少なくとも1つを利用する請求項2に記載のデバイス。
- 前記一連の複数の送信セルの選択されたカバレッジエリアは、車両の交通および鉄道の運行のうち少なくとも一方について設計された主要経路の長さにわたって広がる請求項1から3の何れか1項に記載のデバイス。
- 前記選択モジュールは、前記高移動度Cell−ID設定および前記高負荷容量Cell−ID設定のうち一方を選択するべく、時刻情報、曜日情報、休日情報およびイベント情報のうち少なくとも1つを利用する請求項1から4の何れか1項に記載のデバイス。
- 複数の送信セルから少なくとも1回の速度測定および負荷情報のうち少なくとも一方を受信し、
一の所与の送信セルを前記一連の複数の送信セルに含めることによって前記一連の複数の送信セルを編集する
形成モジュールをさらに備え、
前記一の所与の送信セルは、前記一連の複数の送信セルに既に含まれている送信セルに隣接しており、前記一の所与の送信セルを含む前記一連の複数の送信セルから受信された少なくとも1回の速度測定および負荷情報のうち少なくとも一方は、前記一連の複数の送信セルについて予め定められている範囲内の一連の複数の値を持つ、請求項1から5の何れか1項に記載のデバイス。 - 複数の未設定のCell−IDについての一連の複数のチャネル状態情報基準信号(CSI−RS)を前記一連の複数の送信セルの選択されたカバレッジエリア内の複数のユーザイクイップメント(複数のUE)に送信し、
前記一連の複数のCSI−RSに基づいて前記複数のUEから一連の複数の測定を受信し、前記一連の複数の測定は、前記複数のUEのハンドオーバーを支援するべく利用され、前記選択モジュールは、高移動度Cell−ID設定から高負荷容量Cell−ID設定へと選択を変化させる
測定モジュールをさらに備える
請求項1から6の何れか1項に記載のデバイス。 - エボルブドNodeB(eNodeB)およびエボルブドパケットコア(EPC)内に位置するオペレーションアンドメインテナンスモジュール(O&Mモジュール)のうち少なくとも一方に存在する、無線通信システムにおいて移動度オーバーヘッドと複数の負荷要件との間のバランスを取るための方法であって、
選択モジュールが、一連の複数の送信セルについて、設定閾値に対して相対的な合計値に基づいて、高移動度セル識別情報(Cell−ID)設定(高移動度Cell−ID設定)および高負荷容量Cell−ID設定のうち一方を選択する段階と、
前記選択モジュールと通信している設定モジュールが、移動度オーバーヘッドを低減するべく、一の共通Cell−IDを持つ単一周波数ネットワーク(SFN)を持つ前記高移動度Cell−ID設定において動作するように前記一連の複数の送信セルを設定し、負荷が増加したためにスペクトル効率を改善するべく、複数の異なるCell−IDを持つ複数の送信セルを持つ前記高負荷容量Cell−ID設定において動作するように前記一連の複数の送信セルを設定する段階と
を備え、
前記合計値は、複数の重み付け速度値および複数の重み付け負荷値を含み、
前記複数の重み付け速度値が高くなると、前記設定閾値に対して相対的に、前記高移動度Cell−ID設定を示す複数の値に前記合計値が近くなり、
前記複数の重み付け負荷値が高くなると、前記設定閾値に対して相対的に、前記高負荷容量Cell−ID設定を示す複数の値に前記合計値が近くなる、方法。 - 前記選択モジュールと通信する速度測定モジュールが、前記一連の複数の送信セルについての選択されたカバレッジエリア内の一連の複数のユーザイクイップメント(複数のUE)について少なくとも1回の速度測定を実行する段階と、
前記速度測定モジュールが、前記少なくとも1回の速度測定を前記選択モジュールに通信する段階と
を備える、請求項8に記載の方法。 - 前記選択する段階は、前記選択モジュールが、前記一連の複数の送信セルについて、前記高移動度Cell−ID設定および前記高負荷容量Cell−ID設定のうち一方を選択するべく、負荷情報および前記少なくとも1回の速度測定のうち少なくとも1つを利用する段階を含む、請求項9に記載の方法。
- 前記一連の複数の送信セルの選択されたカバレッジエリアは、車両の交通および鉄道の運行のうち少なくとも一方について設計された主要経路の長さにわたって広がる請求項8から10の何れか1項に記載の方法。
- 前記選択する段階は、前記選択モジュールが、前記高移動度Cell−ID設定および前記高負荷容量Cell−ID設定のうち一方を選択するべく、時刻情報、曜日情報、休日情報およびイベント情報のうち少なくとも1つを利用する段階を含む、請求項8から11の何れか1項に記載の方法。
- 形成モジュールが、複数の送信セルから少なくとも1回の速度測定および負荷情報のうち少なくとも一方を受信する段階と、
前記形成モジュールが、一の所与の送信セルを前記一連の複数の送信セルに含めることによって前記一連の複数の送信セルを編集する段階と
をさらに備え、
前記一の所与の送信セルは、前記一連の複数の送信セルに既に含まれている送信セルに隣接しており、前記一の所与の送信セルを含む前記一連の複数の送信セルから受信された少なくとも1回の速度測定および負荷情報のうち少なくとも一方は、前記一連の複数の送信セルについて予め定められている範囲内の一連の複数の値を持つ、請求項8から12の何れか1項に記載の方法。 - 測定モジュールが、複数の未設定のCell−IDについての一連の複数のチャネル状態情報基準信号(CSI−RS)を前記一連の複数の送信セルの選択されたカバレッジエリア内の複数のユーザイクイップメント(複数のUE)に送信する段階と、
前記測定モジュールが、前記一連の複数のCSI−RSに基づいて前記複数のUEから一連の複数の測定を受信し、前記一連の複数の測定が、前記複数のUEのハンドオーバーを支援するべく利用され、前記選択モジュールが、高移動度Cell−ID設定から高負荷容量Cell−ID設定へと選択を変化させる段階と
をさらに備える、請求項8から13の何れか1項に記載の方法。 - コンピュータに、請求項8から14のいずれか一項に記載の方法を実行させるためのプログラム。
- 請求項15に記載のプログラムを格納するコンピュータ可読媒体。
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