JP2010531577A - 無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 - Google Patents
無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 Download PDFInfo
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- JP2010531577A JP2010531577A JP2010513368A JP2010513368A JP2010531577A JP 2010531577 A JP2010531577 A JP 2010531577A JP 2010513368 A JP2010513368 A JP 2010513368A JP 2010513368 A JP2010513368 A JP 2010513368A JP 2010531577 A JP2010531577 A JP 2010531577A
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- 238000000034 method Methods 0.000 title claims abstract description 92
- 238000005516 engineering process Methods 0.000 title claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 85
- 241000700159 Rattus Species 0.000 claims description 51
- 230000011664 signaling Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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Abstract
Description
Squal=Ec/Io−Qqualmin 式(1)
Srxlev=RSCP−Qrxlevmin−max(UE_TXPWR_MAX_RACH−P_MAX,0) 式(2)
Rank_s=RSCP+Qhyst1+Qoffmbms 式(3)
Rank_n=RSCP−Qoffset1+Qoffmbms 式(4)
Rank_n=RSSI−Qoffset1+Qoffmbms 式(5)
Squal=RSRQ−Qqualmin 式(6)
Srxlev=RSRP−Qrxlevmin−max(UE_TXPWR_MAX_RACH−P_MAX,0) 式(7)
である。
Rank_s=RSRP+Qhyst+(他のいくつかのパラメータ) 式(8)
Rank_n=RSRP−Qoffset+(他のいくつかのパラメータ) 式(9)
Claims (27)
- セル再選択を行うための方法であって、
現在のセル選択品質値を決定することと、
前記セル選択品質値を予め定められた閾値と比較することと、
前記セル選択品質値が前記予め定められた閾値以下である場合、隣接セルの測定を行うことと、
前記測定に基づいて、前記現在のセルより良い隣接セルが見つかった場合、前記より良い隣接セルを再選択することと
を含むことを特徴とする方法。 - 前記セル選択品質値は、参照シンボル受信品質と前記セルにおける最小必要品質レベルとの間の差であることを特徴とする請求項1に記載の方法。
- 前記閾値は、周波数内測定をトリガするための閾値であり、
前記測定は、隣接する同一周波数セルについて行われる
ことを特徴とする請求項1に記載の方法。 - 前記閾値は、周波数間測定をトリガするための閾値であり、
前記測定は、隣接する異周波数セルについて行われる
ことを特徴とする請求項1に記載の方法。 - 前記閾値は、周波数内測定をトリガするための閾値であり、
前記測定は、隣接する同一周波数セルおよび隣接する異周波数セルについて並列して行われる
ことを特徴とする請求項1に記載の方法。 - 前記測定は、前記セル選択品質値が周波数内測定をトリガするための閾値以下であり、周波数間測定をトリガするための閾値以下である場合、隣接する同一周波数セルおよび隣接する異周波数セルについて並列して行われることを特徴とする請求項1に記載の方法。
- 前記閾値は、無線アクセス技術(RAT)間測定をトリガするための閾値であり、
前記測定は、隣接する異なるRATのセルについて行われる
ことを特徴とする請求項1に記載の方法。 - 前記異なるRATの測定は、適した隣接する同一周波数セルまたは隣接する異周波数セルがない場合のみ行われることを特徴とする請求項7に記載の方法。
- サポートされているRATごとに、異なるRATのトリガ閾値が使用されることを特徴とする請求項7に記載の方法。
- 2つの連続する測定間で、予め定められた期間待つ
ことをさらに含むことを特徴とする請求項7に記載の方法。 - 前記予め定められた期間は、ある回数の間欠受信(DRX)サイクルに基づくことを特徴とする請求項10に記載の方法。
- 前記現在のセルが、予め定められた回数連続するDRXサイクルで、予め定められた基準を満たさない場合、前記異なるRATのセルの測定を行うこと
をさらに含むことを特徴とする請求項11に記載の方法。 - 前記予め定められた基準は、S基準であることを特徴とする請求項12に記載の方法。
- 前記S基準は、式:
Srxlev=RSRP−Qrxlevmin−max(UE_TXPWR_MAX_RACH−P_MAX,0)によって定義され、
式中、Srxlevは、セル選択受信レベル、RSRPは、参照シンボル受信電力、Qrxlevminは、前記セルにおける最小必要受信レベル、UE_TXPWR_MAX_RACHは、ランダムアクセスチャネル上で前記セルにアクセスするときに無線送受信ユニット(WTRU)が使用し得る最大電力レベル、およびP_MAXは、前記WTRUの最大無線周波数出力電力であることを特徴とする請求項13に記載の方法。 - 前記RSRP値は、前記WTRUによって測定され、QrxlevminおよびUE_TXPWR_MAX_RACHは、ネットワークから受信されることを特徴とする請求項14に記載の方法。
- 前記予め定められた期間は、無線送受信ユニット(WTRU)によって前記ネットワークから受信されることを特徴とする請求項10に記載の方法。
- 複数の予め定められた期間値は、前記WTRUによって前記ネットワークから受信され、前記WTRUは、現在のチャネル状態に基づいて予め定められた期間値を選択することを特徴とする請求項16に記載の方法。
- 倍率を受信することをさらに含み、前記倍率に前記予め定められた期間値を掛けて、現在のチャネル状態に基づいて前記測定間隔を調整する
ことを特徴とする請求項16に記載の方法。 - 異なるRATのセルを検索することをさらに含むことを特徴とする請求項7に記載の方法。
- 前記検索することは、
少なくとも1つのRATにおけるセルを測定することと、
すべてのRATの前記測定されたセルを最小品質閾値と比較することと、
RATに関係なく、前記閾値を超える前記セルを選択することと、
前記測定に基づいて、前記選択されたセルをランク付けすることと
を含むことを特徴とする請求項19に記載の方法。 - RATごとに異なる最小品質閾値が使用されることを特徴とする請求項20に記載の方法。
- 前記ランク付けは、予め定められた間隔で繰り返し行われることを特徴とする請求項20に記載の方法。
- 前記予め定められた間隔は、ある回数の間欠受信(DRX)サイクルに基づくことを特徴とする請求項22に記載の方法。
- すべての前記RATの中から最強のセルを再選択すること
をさらに含むことを特徴とする請求項20に記載の方法。 - 前記RATの優先順位情報を受信することをさらに含み、前記優先順位情報は、前記異なるRATのセルを測定するための順序を決定するために使用される
ことを特徴とする請求項7に記載の方法。 - 前記優先順位情報は、RAT情報、周波数情報、およびセル情報のうちの少なくとも1つを含むことを特徴とする請求項25に記載の方法。
- 前記予め定められた閾値が使用不可である場合、隣接セルは、常に測定されることを特徴とする請求項1に記載の方法。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US94463007P | 2007-06-18 | 2007-06-18 | |
US60/944,630 | 2007-06-18 | ||
US95073407P | 2007-07-19 | 2007-07-19 | |
US60/950,734 | 2007-07-19 | ||
PCT/US2008/067284 WO2008157573A1 (en) | 2007-06-18 | 2008-06-18 | Method for inter-radio access technology cell reselection |
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JP2012178164A Division JP5330578B2 (ja) | 2007-06-18 | 2012-08-10 | 無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 |
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JP2010531577A true JP2010531577A (ja) | 2010-09-24 |
JP5152876B2 JP5152876B2 (ja) | 2013-02-27 |
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JP2010513368A Active JP5152876B2 (ja) | 2007-06-18 | 2008-06-18 | 無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 |
JP2012178164A Active JP5330578B2 (ja) | 2007-06-18 | 2012-08-10 | 無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 |
JP2013154799A Active JP5678142B2 (ja) | 2007-06-18 | 2013-07-25 | 無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 |
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JP2012178164A Active JP5330578B2 (ja) | 2007-06-18 | 2012-08-10 | 無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 |
JP2013154799A Active JP5678142B2 (ja) | 2007-06-18 | 2013-07-25 | 無線アクセス技術間(inter−radioaccesstechnology)のセル再選択のための方法 |
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US (3) | US8706115B2 (ja) |
EP (3) | EP2782394B1 (ja) |
JP (3) | JP5152876B2 (ja) |
KR (5) | KR20140057686A (ja) |
CN (2) | CN101682872B (ja) |
AR (1) | AR067042A1 (ja) |
AU (2) | AU2008265841A1 (ja) |
BR (1) | BRPI0811699B1 (ja) |
CA (2) | CA2691682C (ja) |
HK (1) | HK1140625A1 (ja) |
IL (1) | IL202801A (ja) |
MY (1) | MY157752A (ja) |
RU (1) | RU2477582C2 (ja) |
SG (1) | SG182211A1 (ja) |
TW (3) | TWI449444B (ja) |
WO (1) | WO2008157573A1 (ja) |
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