JP4927959B2 - 第1又は第2のタイプのcqiレポートのトリガとしてのアップリンクグラントの利用 - Google Patents
第1又は第2のタイプのcqiレポートのトリガとしてのアップリンクグラントの利用 Download PDFInfo
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- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
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- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
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- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
- H04L1/0029—Reduction of the amount of signalling, e.g. retention of useful signalling or differential signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0028—Formatting
- H04L1/003—Adaptive formatting arrangements particular to signalling, e.g. variable amount of bits
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- H—ELECTRICITY
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- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Description
Claims (15)
- チャネル状態フィードバックをユーザ端末UE(800)から基地局(700)へ提供するための、前記UEにおける方法であって、
前記UEが前記基地局からアップリンクグラントを受信しているか否かを判別するステップ(403)と、
前記UEがアップリンクグラントを受信している場合、前記グラントされたリソース上で、前記基地局へ第1のタイプのチャネル状態フィードバック情報を送信するステップ(404)と、
前記UEがアップリンクグラントを受信していない場合、専用リソース上で前記基地局へ前記第1のタイプよりも詳細度が低い第2のタイプのチャネル状態フィードバック情報を送信するか、チャネル状態フィードバック情報を送信しないステップ(405)と、を有することを特徴とする方法。 - 前記UEに対して指定されているチャネル状態フィードバックトリガ基準が有効であるか判別するステップ(402)をさらに有し、前記チャネル状態フィードバックトリガ基準が有効である場合のみ、個々のチャネル状態フィードバック情報が送信される(404,405)ことを特徴とする請求項1記載の方法。
- 前記UEがアップリンクグラントを有さない場合には、詳細度の低い前記第2のタイプのチャネル状態フィードバック情報が周期的に送信され、前記アップリンクグラントを有する場合には、より詳細な前記第1のタイプのチャネル状態フィードバック情報が周期的に送信されることを特徴とする請求項1又は請求項2に記載の方法。
- 前記UEがアップリンクデータを有するかどうかを判別するステップ(505)をさらに有し、前記UEがアップリンクデータ及びアップリンクグラントを有する場合、スケジューリングされるアップリンク送信(507)がチャネル状態フィードバック情報とアップリンクデータの両方から構成されることを特徴とする請求項1又は請求項2に記載の方法。
- 前記UEがアップリンクデータを有するかどうかを判別するステップをさらに有し、アップリンクグラントを有するがアップリンクデータを有さない場合、スケジューリングされるアップリンクデータ送信(506)が、チャネル状態フィードバック情報のみから構成されることを特徴とする請求項1又は請求項2に記載の方法。
- 前記スケジュールされるアップリンク送信が、前記基地局への空バッファ状態情報のシグナリングとして用いられることを特徴とする請求項5記載の方法。
- 前記スケジュールされるアップリンク送信が、ダウンリンクで送信された前記アップリンクグラントの受領確認として用いられることを特徴とする請求項5記載の方法。
- チャネル状態フィードバックを基地局(700)へ提供するためのユーザ端末UE(800)であって、
前記UEが前記基地局からアップリンクグラントを受信しているかどうかを判別する判別部(802)と、
前記UEがアップリンクグラントを受信している場合、前記グラントされたリソース上で、前記基地局へ第1のタイプのチャネル状態フィードバック情報を送信し、前記UEがアップリンクグラントを受信していない場合、専用リソース上で前記基地局へ前記第1のタイプよりも詳細度が低い第2のタイプのチャネル状態フィードバック情報を送信するか、チャネル状態フィードバック情報を送信しない、送信部(807)と、を有することを特徴とするUE。 - 前記生成部は、前記UEがアップリンクグラントを有さない場合には、詳細度の低い前記第2のタイプのチャネル状態フィードバック情報を周期的に生成し、前記UEが前記アップリンクグラントを有する場合には、より詳細な前記第1のタイプのチャネル状態フィードバック情報を周期的に生成するように構成されることを特徴とする請求項8記載のUE。
- UE(800)からチャネル状態フィードバックを取得するためのスケジューラを有する基地局(700)における方法であって、
チャネル状態フィードバックが必要かどうか判別するステップ(901)と、
チャネル状態フィードバックが必要な場合、アップリンクグラントを生成するステップ(904)と、
前記チャネル状態フィードバックを前記グラントしたリソース上で受信するため、前記生成されたアップリンクグラントを前記UEへ提供するステップ(905)と、を有することを特徴とする方法。 - 前記判別するステップが、前記基地局においてダウンリンクデータが存在するかどうかを判別するステップと、前記ダウンリンクデータが存在する場合に、前記チャネル状態フィードバックを前記グラントしたリソース上で受信するため、アップリンクグラントを生成して前記UEへ提供するステップと、をさらに有することを特徴とする請求項10記載の方法。
- 前記判別するステップが、前記アップリンクの負荷が閾値th未満かどうかを判別するステップと、前記アップリンクの負荷が前記閾値未満の場合、アップリンクグラントを生成して前記UEへ提供するステップとをさらに有することを特徴とする請求項11記載の方法。
- 前記アップリンクグラントが、少なくともチャネル状態フィードバックを含んだアップリンク送信を前記グラントされたリソース上で受信する目的で前記UEへ提供され、前記UEからの前記アップリンク送信が、前記UEからのアップリンクデータのリンクアダプテーション及びチャネル依存スケジュールの少なくとも一方のための前記アップリンクのチャネル品質を推定するために用いられることを特徴とする請求項10記載の方法。
- 前記アップリンクグラントが、アップリンク同期を維持する目的で前記UEへ提供されることを特徴とする請求項10記載の方法。
- ユーザ端末UE(800)からチャネル状態フィードバックを取得するためのスケジューラ(701)を有する基地局(700)であって、チャネル状態フィードバックが必要かどうかを判別し、チャネル状態フィードバックが必要な場合には、前記チャネル状態フィードバックをグラントされたリソース上で受信するためにアップリンクグラントを生成する生成部(703)と、
前記アップリンクグラントを前記UEへ送信する送信部(704)と、
前記送信されたアップリンクグラントに応答した前記チャネル状態フィードバックを受信する受信部(706)と、を有することを特徴とする基地局。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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SE0700701-6 | 2007-03-19 | ||
SE0700701 | 2007-03-19 | ||
PCT/SE2007/050683 WO2008115110A1 (en) | 2007-03-19 | 2007-09-27 | Using an uplink grant as trigger of first or second type of cqi report |
Publications (3)
Publication Number | Publication Date |
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JP2010522461A JP2010522461A (ja) | 2010-07-01 |
JP2010522461A5 JP2010522461A5 (ja) | 2010-10-14 |
JP4927959B2 true JP4927959B2 (ja) | 2012-05-09 |
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JP2009554476A Active JP4927959B2 (ja) | 2007-03-19 | 2007-09-27 | 第1又は第2のタイプのcqiレポートのトリガとしてのアップリンクグラントの利用 |
Country Status (24)
Country | Link |
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US (7) | US8837381B2 (ja) |
EP (4) | EP2835924B1 (ja) |
JP (1) | JP4927959B2 (ja) |
KR (1) | KR101460822B1 (ja) |
CN (2) | CN101637044B (ja) |
AR (1) | AR067216A1 (ja) |
AU (1) | AU2007349357B2 (ja) |
BR (1) | BRPI0721419B1 (ja) |
CA (1) | CA2680718C (ja) |
DK (2) | DK2835924T3 (ja) |
EG (1) | EG25811A (ja) |
ES (3) | ES2538358T3 (ja) |
HK (1) | HK1141655A1 (ja) |
HU (2) | HUE045919T2 (ja) |
IL (1) | IL200744A (ja) |
MA (1) | MA31261B1 (ja) |
MX (1) | MX2009007177A (ja) |
MY (1) | MY149225A (ja) |
NZ (1) | NZ578806A (ja) |
PL (1) | PL2127177T3 (ja) |
PT (1) | PT2835924T (ja) |
RU (1) | RU2456749C2 (ja) |
WO (2) | WO2008115110A1 (ja) |
ZA (1) | ZA200905373B (ja) |
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