JP2017011748A - 基準信号受信品質(rsrq)を使用するハンドオーバ向上のためのユーザ機器 - Google Patents
基準信号受信品質(rsrq)を使用するハンドオーバ向上のためのユーザ機器 Download PDFInfo
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- JP2017011748A JP2017011748A JP2016175078A JP2016175078A JP2017011748A JP 2017011748 A JP2017011748 A JP 2017011748A JP 2016175078 A JP2016175078 A JP 2016175078A JP 2016175078 A JP2016175078 A JP 2016175078A JP 2017011748 A JP2017011748 A JP 2017011748A
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Abstract
【解決手段】UEは、UEの速度に少なくとも部分的に基づいてハンドオーバ開始パラメータを適合的に選択する。UEは、サービングセルのRSRQおよびターゲットセルのRSRQを判断し、ターゲットセルRSRQが選択されたハンドオーバ開始パラメータに従うサービングセルRSRQを超える場合に、サービングセルからターゲットセルへのハンドオーバのために、サービングeNBに測定レポートを送信する。ハンドオーバ開始パラメータは、A3offsetとTTTのペアを含むA3offset値およびトリガ時間(TTT)等のオフセット値を含む。
【選択図】図2
Description
Claims (21)
- ハンドオーバ開始のためにユーザ機器(UE)により実行される方法であって、
マクロセルまたはピコセルのいずれかを含むサービングセルのタイプおよびマクロセルまたはピコセルのいずれかを含むターゲットセルのタイプのうち1つまたは複数および前記UEの速度に基づいてA3offsetとトリガ時間(TTT)のペアを選択し、前記A3offsetとTTTのペアは、A3offset値およびTTTを含む段階と、
サービングセルの基準信号受信品質(RSRQ)およびターゲットセルのRSRQを判断する段階と、
前記ターゲットセルの前記RSRQが前記TTTに対する少なくともA3offset値だけ前記サービングセルの前記RSRQを超える場合に、前記ターゲットセルへのハンドオーバのために前記サービングセルの拡張型ノードB(eNB)に測定レポートを送信する段階とを備える方法。 - 前記サービングセルの前記RSRQおよび前記ターゲットセルの前記RSRQは、基準信号を含むリソースブロック(RB)の受信信号強度インジケータ(RSSI)に対する基準信号受信電力(RSRP)の比率から判断される、請求項1に記載の方法。
- 前記サービングセルの前記RSRQおよび前記ターゲットセルの前記RSRQは、E‐UTRAN LTEのための3GPP規格に準拠して判断され、
前記サービングセルの前記RSRQおよび前記ターゲットセルの前記RSRQは、ハンドオーバ開始のためのイベントA3に対する入力条件および終了条件を決定する、請求項2に記載の方法。 - 前記RSRPは、予め定められた物理リソースブロック(PRB)においてeNBにより送信されるチャネル状態情報基準信号(CIS‐RS)および共通基準信号(CRS)のうち1または複数から判断される、請求項3に記載の方法。
- より大きいUEの速度に対して、より小さいA3offset値およびより短いTTTを選択し、
より小さいUEの速度に対して、より大きいA3offset値およびより長いTTTを選択する、請求項4に記載の方法。 - 前記UEの前記速度は、前記UEのモビリティ状態に基づき、予め定められた期間中のセルの再選択の回数から判断される、請求項4または5に記載の方法。
- 前記UEの前記速度は、ターゲットeNBおよびサービングeNBを含む1または複数のeNBから送信された信号から判断される位置または所在地の推定における変化から判断される、請求項4から6のいずれか1項に記載の方法。
- 前記UEの前記速度は、補助衛星測位技術を使用して判断される、請求項4から7のいずれか1項に記載の方法。
- 予め定められた低い値未満の速度に対して、前記UEは、複数のA3offsetとTTTのペアから第1のA3offsetとTTTのペアを選択し、
前記予め定められた低い値より大きいか等しい速度、および予め定められた高い値より小さいか等しい速度に対して、前記UEは、前記複数のA3offsetとTTTのペアから第2のA3offsetとTTTのペアを選択し、
前記予め定められた高い値より大きい速度に対して、前記UEは、前記複数のA3offsetとTTTのペアから第3のA3offsetとTTTのペアを選択する、請求項4から8のいずれか1項に記載の方法。 - 前記UEは、前記サービングセルのeNBおよび前記ターゲットセルのeNBにより送信された1または複数のセルまたはeNB識別情報に基づいて、前記サービングセルのタイプおよび前記ターゲットセルのタイプのうち少なくとも1つを判断し、
前記eNB識別情報は、マクロセルまたはピコセルを示す、請求項1から9のいずれか1つに記載の方法。 - 前記UEは、前記サービングセルの前記eNBおよび前記ターゲットセルの前記eNBのうち少なくとも1つにより送信された基準信号の測定信号強度に基づいて、前記サービングセルのタイプおよび前記ターゲットセルのタイプのうち少なくとも1つを判断する、請求項1から10のいずれか1つに記載の方法。
- ピコサービングセルからマクロターゲットセルへのハンドオーバのために、より小さいA3offset値およびより小さいTTTを選択し、
マクロサービングセルからピコターゲットセルへのハンドオーバのために、より大きいA3offset値およびより小さいTTTを選択する、請求項1から11のいずれか1項に記載の方法。 - ユーザ機器(UE)であって、
マクロセルまたはピコセルのいずれかを含むサービングセルのタイプおよびマクロセルまたはピコセルのいずれかを含むターゲットセルのタイプのうち1つまたは複数および前記UEの速度に基づいて、A3offsetとTTTのペアを選択し、基準信号を含むリソースブロック(RB)の受信信号強度インジケータ(RSSI)に対する基準信号受信電力(RSRP)の比率から、サービングセルの基準信号受信品質(RSRQ)およびターゲットセルのRSRQを判断する処理回路と、
前記ターゲットセルのRSRQがトリガ時間(TTT)に対する少なくともA3offset値だけ前記サービングセルのRSRQを超える場合に、前記サービングセルから前記ターゲットセルへのハンドオーバのために、測定レポートをサービングeNBに送信する物理層回路とを備えるUE。 - 前記RSRPは、予め定められた物理リソースブロック(PRB)においてeNBにより送信されるチャネル状態情報基準信号(CIS‐RS)および共通基準信号(CRS)のうち1つまたは複数から判断される、請求項13に記載のUE。
- より大きなUEの速度に対して、より小さいA3offset値およびより短いTTTを選択し、
より小さいUE速度に対して、より大きいA3offset値およびより長いTTTを選択する、請求項13または14に記載のUE。 - 前記UEの前記速度は、前記UEのモビリティ状態に基づき、予め定められた期間中のセルの再選択の回数から判断される、請求項13から15のいずれか1項に記載のUE。
- 前記UEの前記速度は、ターゲットeNBおよび前記サービングeNBを含む1または複数のeNBから送信された信号から判断される位置または所在地の推定における変化から判断される、請求項13から16のいずれか1項に記載のUE。
- 前記UEの前記速度は、補助衛星測位技術を使用して判断される、請求項13から17のいずれか1項に記載のUE。
- ハンドオーバ開始のためのオペレーションをコンピュータに実行させるプログラムであって、
マクロセルまたはピコセルのいずれかを含むサービングセルのタイプおよびマクロセルまたはピコセルのいずれかを含むターゲットセルのタイプのうち1つまたは複数およびユーザ機器(UE)の速度に基づいてA3offsetとTTTのペアを選択し、前記A3offsetとTTTのペアは、A3offset値およびトリガ時間(TTT)を含む手順と、
サービングセルの基準信号受信品質(RSRQ)およびターゲットセルのRSRQを判断する手順と、
前記ターゲットセルの前記RSRQが前記TTTに対する少なくとも前記A3offset値だけ前記サービングセルのRSRQを超える場合に、前記ターゲットセルへのハンドオーバのために、前記サービングセルの拡張型ノードB(eNB)に測定レポートを送信させる手順とを含むプログラム。 - 前記サービングセルの前記RSRQおよび前記ターゲットセルの前記RSRQは、基準信号を含むリソースブロック(RB)の受信信号強度インジケータ(RSSI)に対する基準信号受信電力(RSRP)の比率から判断され、
前記サービングセルの前記RSRQおよび前記ターゲットセルの前記RSRQは、ハンドオーバ開始のためにイベントA3に対する入力条件および終了条件を決定し、
前記RSRPは、予め定められた物理リソースブロック(PRB)においてeNBにより送信されるチャネル状態情報基準信号(CIS‐RS)および共通基準信号(CRS)のうち1つまたは複数から判断される、請求項19に記載のプログラム。 - 請求項19または20に記載のプログラムを格納するコンピュータ可読記憶媒体。
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US9130688B2 (en) | 2015-09-08 |
CN104303557A (zh) | 2015-01-21 |
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EP2848039B1 (en) | 2019-03-06 |
US20130303231A1 (en) | 2013-11-14 |
JP2015520560A (ja) | 2015-07-16 |
ES2728923T3 (es) | 2019-10-29 |
WO2013169904A1 (en) | 2013-11-14 |
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