JP2013138506A - ランダムアクセス手順を行う方法及び装置 - Google Patents
ランダムアクセス手順を行う方法及び装置 Download PDFInfo
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1874—Buffer management
- H04L1/1877—Buffer management for semi-reliable protocols, e.g. for less sensitive applications like streaming video
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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Abstract
【解決手段】本発明は、移動端末と前記端末によりランダムアクセス手順を行う方法を提供する。前記端末によりランダムアクセス手順を行う方法は、ランダムアクセスプリアンブルを基地局に送信する段階と、前記基地局からランダムアクセス応答を受信する段階と、前記基地局からのアップリンクグラントを利用してアップリンク伝送を行う段階とを含む。前記アップリンク伝送は、HARQ(Hybrid Automatic Repeat reQuest)の最大伝送回数パラメータを使用して行われ、前記HARQの最大伝送回数パラメータは、前記基地局から受信されるシステム情報ブロック(System Information Block; SIB)に含まれる。
【選択図】図7
Description
・基地局との接続(RRC接続)がないため、端末が初期接続を行う場合
・ハンドオーバー手順で端末がターゲットセルに最初にアクセスする場合
・基地局の命令により要求される場合
・アップリンクの時間同期が取れていないか、又は無線リソースを要求するために使用される指定された無線リソースが割り当てられていない状況で、アップリンクへのデータが発生する場合
・無線リンク障害(radio link failure)又はハンドオーバー失敗(handover failure)時の復旧手順の場合
・これは、個別C−RNTIを用いてPDCCH上にパーシステントスケジューリング又はダイナミックスケジューリングにより割り当てられるUL−SCHリソースに適用される。
・UL−SCHリソースに対し:
・・システム情報を介してMAX_NUMBER_OF_ReTXが通知される。
・・・この値はRACH MSG3に適用される。
・UL−SCHリソースに対し:
・・システム情報を介してRACHのためのMAX_NUMBER_OF_ReTXが通知される。
・・個別RRCシグナリングを介してUEのためのMAX_NUMBER_OF_ReTXが通知される。
・・・2つのMAX_NUMBER_OF_ReTXが同一である場合
・・・・前記MAX_NUMBER_OF_ReTXはRACH MSG3に適用される。
・・・前記2つの値が異なる場合
・・・・システム情報を介して受信した値が適用される。
・・・・又は、個別RRCシグナリングを介して受信した値が適用される。
・・・・又は、2つのより少ない値が適用される。
・・・・又は、2つのより大きい値が適用される。
・・・・又は、RACHメッセージ2を介してMAX_NUMBER_OF_ReTXが通知される。この値はRACH MSG3のHARQに適用される。
・・・・又は、使用されたRACHプリアンブルグループによって、各RACHプリアンブルグループはMAX_NUMBER_OF_ReTXを割り当てられる。
・・・・・従って、前記UEは、RACH MSG1で送信された前記使用されたRACHプリアンブルグループに関するMAX_NUMBER_OF_ReTX値を用いる。
・・・・・各RACHグループのMAX_NUMBER_OF_ReTX値は、システム情報により示される。
・パラメータ:Msg3 HARQの最大伝送回数
RA−RNTI=t_id+10*f_id
ここで、t_idは、特定PRACHの最初のサブフレームのインデックスであり(0≦t_id<10)、f_idは、周波数領域の昇順の前記サブフレーム内の特定PRACHのインデックスである(0≦f_id<6)。
・ランダムアクセス応答がバックオフインジケータサブヘッダを含む場合:
・UEは、前記バックオフインジケータサブヘッダのBIフィールドに示されたようにUE内のバックオフパラメータ値を設定する。
・そうでなければ、UEは、UE内のバックオフパラメータ値を0msに設定する。
・ランダムアクセス応答が伝送されたランダムアクセスプリアンブルに対応するランダムアクセスプリアンブル識別子を含む場合(5.1.3節を参照)、UEは、
・前記ランダムアクセス応答を正常に受信したとみなし、
・受信したタイミングアドバンスコマンド(Timing Advance Command)(5.2節を参照)を処理し、
・下位層に最後のプリアンブル伝送に適用されたパワーランピング(power ramping)の量を示し(すなわち、(PREAMBLE_TRANSMISSION_COUNTER−1)*POWER_RAMP_STEP)、
・前記受信されたULグラント値を処理してこれを前記下位層に示し、
・ランダムアクセスプリアンブルが明確にシグナリングされ、シグナリングされたランダムアクセスプリアンブルIDが000000ではない場合(すなわち、MACにより選択されない場合)
・UEは、前記ランダムアクセス手順が正常に完了したとみなす。
・そうでなければ、前記ランダムアクセスプリアンブルがUE MACにより選択される場合
・UEは、前記一時C−RNTIを、前記ランダムアクセス応答メッセージで提供されるULグラントに対応する最初の送信前に、前記ランダムアクセス応答メッセージで受信される値に設定し、
・前記ランダムアクセス応答メッセージが前記ランダムアクセス手順で最初に正常に受信したメッセージの場合
・前記送信がCCCH論理チャネルのために行われるのではなければ、UEは、前記マルチプレクシング及びアセンブリエンティティに、後続のアップリンク伝送時にC−RNTI MAC制御素子を含むように指示し、
・前記「マルチプレクシング及びアセンブリ」エンティティから伝送されたMAC PDUを取得し、これをMsg3バッファに保存する。
Claims (9)
- システム情報又は個別メッセージを介してHARQの最大伝送回数パラメータを受信するよう構成された無線リソース制御(RRC)層と、
前記RRC層から2種類のHARQの最大伝送回数パラメータを受信するよう構成されたメディア・アクセス制御(MAC)層と、
を有し、
第1の種類のHARQの最大伝送回数パラメータが、RACH手順に関連するデータの伝送のために使用され、第2の種類のHARQの最大伝送回数パラメータが、その他のタイプの伝送のために使用されることを特徴とする端末。 - 前記RACH手順に関連するデータの伝送が、RACH MSG3メッセージを使用することを特徴とする請求項1に記載の端末。
- 前記第1の種類のHARQの最大伝送回数パラメータが前記システム情報を介して受信され、前記第2の種類のHARQの最大伝送回数パラメータが前記個別メッセージを介して受信されることを特徴とする請求項1に記載の端末。
- 前記RACH手順に関連するデータの伝送が、RACHアクセス応答で受信されるアップリンクグラントを利用するアップリンク伝送として定義されることを特徴とする請求項1に記載の端末。
- 前記RACHアクセス応答が、一時的に保存されるメッセージの生成をトリガすることを特徴とする請求項4に記載の端末。
- 前記HARQの最大伝送回数パラメータが、前記端末のHARQバッファをいつフラッシュするかを決定するのに使用されることを特徴とする請求項1に記載の端末。
- HARQの最大伝送回数及びMsg3 HARQの最大伝送回数が、前記RRC層により設定されることを特徴とする請求項1に記載の端末。
- Msg3バッファに保存されているMAC PDUの伝送を除いた、全てのHARQプロセス及び全ての論理チャネルの伝送において、最大伝送回数がHARQの最大伝送回数に設定されることを特徴とする請求項1に記載の端末。
- Msg3バッファに保存されているMAC PDUの伝送において、最大伝送回数がMsg3 HARQの最大伝送回数に設定されることを特徴とする請求項1に記載の端末。
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KR1020090031965A KR100992780B1 (ko) | 2008-04-14 | 2009-04-13 | 랜덤 액세스 절차를 수행하는 방법 |
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EP (1) | EP2263341B1 (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US12015485B2 (en) | 2020-04-04 | 2024-06-18 | Nec Corporation | Methods, devices, and medium for communication |
JP7509228B2 (ja) | 2020-04-04 | 2024-07-02 | 日本電気株式会社 | 通信のための方法、端末装置、及びネットワーク装置 |
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JP2014112919A (ja) | 2014-06-19 |
EP2263341A2 (en) | 2010-12-22 |
US20090259910A1 (en) | 2009-10-15 |
WO2009128642A2 (en) | 2009-10-22 |
JP5469760B2 (ja) | 2014-04-16 |
WO2009128642A3 (en) | 2010-01-14 |
JP5654698B2 (ja) | 2015-01-14 |
CN101999219A (zh) | 2011-03-30 |
JP2011521518A (ja) | 2011-07-21 |
US8307252B2 (en) | 2012-11-06 |
CN103795511A (zh) | 2014-05-14 |
US7979769B2 (en) | 2011-07-12 |
EP2263341A4 (en) | 2012-06-06 |
CN103795511B (zh) | 2018-05-01 |
JP5221753B2 (ja) | 2013-06-26 |
US20110222498A1 (en) | 2011-09-15 |
EP2263341B1 (en) | 2018-09-19 |
CN101999219B (zh) | 2014-02-19 |
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