JP2020523938A - 無線通信システムにおいてビーム失敗の回復を実行する方法とそのための装置 - Google Patents
無線通信システムにおいてビーム失敗の回復を実行する方法とそのための装置 Download PDFInfo
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- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- H04W—WIRELESS COMMUNICATION NETWORKS
- 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
-
- H—ELECTRICITY
- 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
- H04B7/0617—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 for beam forming
-
- H—ELECTRICITY
- 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
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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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
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- 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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
でスケーリング(scaling)することにより、誘導することができる。また、非常に高い搬送波周波数で非常に低いサブキャリア間隔を利用しないと仮定されるとしても、利用されるヌメロロジーは周波数帯域と独立して選択されることができる。
の時間の単位の倍数で表現される。ここで、
であり、
である。下りリンク(downlink)とアップリンク(uplink)伝送は、
の区間を有する無線フレーム(radio frame)で構成される。ここで、無線フレームは、それぞれ
の区間を有する10個のサブフレーム(subframe)で構成される。この場合、アップリンクの1セットのフレーム及び下りリンクの1セットのフレームが存在することができる。
の前に開始しなければならない。
について、スロット(slot)は、サブフレーム内で
の増加する順序で番号が付けられ、無線フレーム内で
の増加する順序で番号が付けられる。一つのスロットは、
の連続するOFDMシンボルで構成され、
は、利用されるヌメロロジーとスロットの設定(slot configuration)に基づいて決定される。サブフレームでスロット
の開始は、同一サブフレームでOFDMシンボ
の開始と時間的に整列される。
での一般(normal)CPのスロットごとのOFDMシンボルの数を示し、表3は、ヌメロロジー
での拡張(extended)CPのスロットごとのOFDMシンボルの数を示す。
サブキャリアで構成され、一つのサブフレームが14・2μOFDMシンボルで構成されることを例示的に記述するが、これに限定されるものではない。
サブキャリアで構成される一つまたはその以上の資源グリッド及
のOFDMシンボルによって説明される。ここで、
である。前記
は、最大伝送帯域幅を示し、これは、ヌメロロジーだけでなく、アップリンクとダウンリンクの間でも異なることができる。
とアンテナポートpごとに1つの資源グリッドが設定されることができる。
とアンテナポートpに対する資源グリッドの各要素は、資源要素(resource element)と呼ばれ、インデックス対
によって固有的に識別される。ここで、
は、周波数領域上のインデックスであり、
は、サブフレーム内でシンボルの位置を指す。スロットでの資源要素を指すときは、インデックス対
が使用される。ここで、
である。
とアンテナポートpに対する資源要素
は、複素値(complex value)
に該当する。混同(confusion)になる危険性がない場合、あるいは、特定のアンテナポートまたはヌメロロジーが特定されない場合には、インデックスp及びドロップ(drop)されることができ、その結果、複素値は
または
になることができる。
連続的なサブキャリアとして定義される。周波数領域上で、物理資源ブロックは、0から
まで番号が付けられる。このとき、周波数領域上の物理資源ブロック番号(physical resource block number)
と資源要素
間の関係は、数式1のように与えられる。
まで番号が付けられる。
のUE仮定
のUE仮定
及び、
が一つのCSIプロセスの上位層シグナリングで構成された場合、
は、当該CSIプロセスの各CSIサブフレームセットに対して設定される。
で表示されるシンボルに該当する。
Claims (9)
- 無線通信システムでビーム失敗の回復(beam failure recovery)を実行する方法において、端末によって実行される方法は、
ビーム失敗の回復要請(beam failure recovery request)に関する資源の設定(resource configuration)を基地局から受信するステップと、
ビーム管理(beam management)に使用されるビーム基準信号(beam reference signal:BRS)を前記基地局から受信するステップと、
ビーム失敗イベント(beam failure event)が検出された場合、前記資源設定に基づいて、ビーム失敗の回復要請(beam failure recovery request)を第1資源を用いて前記基地局に伝送するステップと、
ビームレポート(beam reporting)がトリガされた(triggered)場合、前記ビーム基準信号による測定結果を前記基地局に報告する段階を含み、
前記第1資源は、PRACH(Physical Random Access Channel)またはPUCCH(Physical Uplink Control Channel)であることを特徴とする方法。 - 前記第1資源が前記PRACHの場合、前記PRACHは、非‐競合ベース(non-contention based)PRACHであることを特徴とする、請求項1に記載の方法。
- 前記第1資源が前記PUCCHである場合、前記ビーム失敗の回復要請は、ビームが失敗するかどうかだけを知らせる指示子タイプ(indicator type)PUCCHまたは候補ビーム(candidate beam)の情報を含むメッセージタイプ(message type)PUCCHを用いることを特徴とする、請求項1に記載の方法。
- 前記ビーム失敗イベントが特定のサービングビームリンク(serving beam link)のビームが失敗である場合、前記ビーム失敗の回復要請は、前記メッセージタイプPUCCHを用いることを特徴とする、請求項3に記載の方法。
- 前記ビーム失敗の回復要請に対する応答を、前記基地局から受信していない場合には、前記ビーム失敗の回復要請を第2資源を用いて再伝送するステップをさらに含むことを特徴とする、請求項2に記載の方法。
- 前記第2資源は、競合ベースの(contention based)PRACHであることを特徴とする、請求項5に記載の方法。
- 前記第1資源で、前記ビーム失敗の回復要請が他のPUCCHフォーマット(format)と重畳する場合、前記他のPUCCH formatをドロップ(drop)することを特徴とする、請求項3に記載の方法。
- 前記ビーム失敗の回復要請がメッセージタイプ(message type)PUCCHである場合、前記候補ビームのRS(Reference Signal)にQCL(Quasi co-location)を仮定して、前記ビーム失敗の回復要請に対する応答を受信することを特徴とする、請求項3に記載の方法。
- 無線通信システムでビーム失敗の回復(beam failure recovery)を実行するための端末において、
無線信号を送受信するためのRFモジュール(radio frequency module)と、
前記RFモジュールと機能的に接続されているプロセッサを含み、
前記プロセッサは、
ビーム失敗の回復要請(beam failure recovery request)に関連した資源の設定を基地局から受信し、
ビーム管理(beam management)に使用されるビーム基準信号(beam reference signal:BRS)を前記基地局から受信し、
ビーム失敗イベント(beam failure event)が検出された場合、前記資源設定に基づいて、ビーム失敗の回復要請(beam failure recovery request)を第1資源を用いて前記基地局に伝送し、と
ビームレポート(beam reporting)がトリガされた(triggered)場合には、前記ビーム基準信号による測定結果を前記基地局に報告(report)するように設定され、
前記第1資源は、PRACH(Physical Random Access Channel)またはPUCCH(Physical Uplink Control Channel)であることを特徴とする端末。
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201762521253P | 2017-06-16 | 2017-06-16 | |
US62/521,253 | 2017-06-16 | ||
US201762537967P | 2017-07-28 | 2017-07-28 | |
US62/537,967 | 2017-07-28 | ||
PCT/KR2018/006083 WO2018230862A1 (en) | 2017-06-16 | 2018-05-29 | Method for performing beam failure recovery in wireless communication system and apparatus for the same |
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JP2020523938A true JP2020523938A (ja) | 2020-08-06 |
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ID=64660237
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JP2019569780A Pending JP2020523938A (ja) | 2017-06-16 | 2018-05-29 | 無線通信システムにおいてビーム失敗の回復を実行する方法とそのための装置 |
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US (2) | US11229081B2 (ja) |
EP (1) | EP3639592A4 (ja) |
JP (1) | JP2020523938A (ja) |
KR (1) | KR102182601B1 (ja) |
CN (2) | CN117202254A (ja) |
WO (1) | WO2018230862A1 (ja) |
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WO2018230862A1 (en) | 2018-12-20 |
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KR20200008666A (ko) | 2020-01-28 |
CN110999471A (zh) | 2020-04-10 |
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CN117202254A (zh) | 2023-12-08 |
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US11229081B2 (en) | 2022-01-18 |
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