JP4426568B2 - ソフトウェアハンドオーバ間のアップリンクレートを選択するシステム及び方法 - Google Patents
ソフトウェアハンドオーバ間のアップリンクレートを選択するシステム及び方法 Download PDFInfo
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- 238000005516 engineering process Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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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
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
- H04L1/0034—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter where the transmitter decides based on inferences, e.g. use of implicit signalling
-
- 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
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
- H04L1/203—Details of error rate determination, e.g. BER, FER or WER
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
-
- 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
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
-
- 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
- H04L1/1809—Selective-repeat protocols
-
- 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]
- H04L1/1816—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of the same, encoded, message
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Electrotherapy Devices (AREA)
Description
分野
本発明は、一般にデータ通信に関し、より具体的には、ワイヤレス通信システムにおけるアップリンクレートを選択する技術に関する。
ワイヤレス通信システムは、音声、パケットデータなどのさまざまなサービスを提供するために広く利用される。このシステムは、複数のユーザとの通信をサポートすることができる多重アクセスシステムであり、符号分割多重接続(CDMA)、時分割多重接続(TDMA)、周波数分割多重接続(FDMA)や、他の多重接続技術に基づいている。CDMAシステムは、増加したシステム容量を含む、他の型式のシステムを超える一定の利点を提供し得る。
ここで、端末(あるいはUE)及び複数の基地局(あるいはノードBs)の間のアップリンクのリンク不均衡の影響を緩和する技術が提供される。アップリンク伝送レートは、調整された交渉アップリンク伝送レートと、異なるノードからの電力制御コマンド間の差分とに基づき選択される。
本発明の特徴、特性及び利点は、参照符号が全体を通して対応して識別する図面に関連して取り上げられるときに、以下に示される詳細な説明からより明らかになるであろう。
図1は、さまざまな実施形態を実装し得るワイヤレス通信システム100の図である。システム100は、特定の地理的領域のサービス区域を提供する複数の基地局104を含む。簡単化のため、2つの基地局のみが図1には示される。基地局はまた、ノードB、ベーストランシーバシステム(BTS)、アクセスポイント、或いは当該分野に長けた者に知られた他の用語として参照される。ある実施形態では、基地局はユニバーサル移動遠距離通信システム(UMTS)放送アクセスネットワーク(UTRAN)の一部である。
・CPICH 共通パイロットチャネル
・DPDCH 専用物理データチャネル
・E−DPDCH 強化専用物理データチャネル
・DPCCH 専用物理制御チャネル
・DPCH 専用物理チャネル(DPDCH及びDPCCHを含む)
・HS−DSCH 高速ダウンリンク共用チャネル
・HS−SCCH HS−DSCHの共用制御物理チャネル
・HS−PDSCH 高速物理ダウンリンク共用チャネル
・HS−DPCCH 高速専用物理制御チャネル(アップリンク)
・GCH 認可(grant)チャネル(ダウンリンク)
W−CDMAのリリース5は、高速ダウンリンクパケット接続(HSDPA)をサポートし、これはダウンリンクでのデータの高速伝送を可能にするUTRANの一部として定義される物理チャネル及び手順の組である。HSDPAのデータは、トランスポートブロック(あるいはパケット)で処理され、その各々は、伝送時間インターバル(TTI)として参照される時間インターバルに及ぶ。トランスポートブロックは、次に、複数のUEにより共用され得るダウンリンクトランスポートチャネルである高速ダウンリンク共用チャネル(HS−DSCH)に多重化される。HD−DSCHは、次に、高速物理ダウンリンク共用チャネル(HS−PDSCH)にマッピングされる。
B2:−1−1+1=−1
…
Δ=+2
当該技術分野で既知の他の技術がPCコマンド間の差分値を決定するのに用いられ得ることは当該技術分野に長けた者には明らかである。ステップ216から、制御フローはステップ218に進む。
Claims (8)
- ワイヤレス通信システムにおけるアップリンク伝送レートを選択する方法であって、
公称アップリンク伝送レートを受信することと、
第1のノードからの第1の電力制御コマンドの組と第2のノードからの第2の電力制御コマンドの組とに基づいて、差分値を決定することと、
前記公称アップリンク伝送レートと前記差分値とに基づいて、アップリンク伝送レートを選択することとを含む方法。 - 前記第1の電力制御コマンドの組の長さ及び前記第2の電力制御コマンドの組の長さは、nである請求項1記載の方法。
- 前記第1の電力制御コマンドの組は、サービングノードからのものであり、前記第2の電力制御コマンドの組は、最高のアップリンク伝送信号対ノイズ及び干渉比(SNR)を有する第2のノードからのものである請求項1記載の方法。
- 前記差分値は、
電力制御値を、前記第1の電力制御コマンドの組における各電力制御コマンドに割り当てて、電力制御値を、前記第2の電力制御コマンドの組における各電力制御コマンドに割り当ることと、
前記第1の電力制御値の組の前記電力制御値を合計し、第1の合計を生成させることと、
前記第2の電力制御値の組の前記電力制御値を合計し、第2の合計を生成させることと、
前記第1の合計と前記第2の合計との間の差分を計算することとにより決定される請求項1記載の方法。 - 前記第1の合計と前記第2の合計との間の差分を、差分ゲイン値に換算することをさらに含む請求項4記載の方法。
- ワイヤレス通信システムのための端末であって、
公称アップリンク伝送レートを受信する手段と、
第1のノードからの第1の電力制御コマンドの組と第2のノードからの第2の電力制御コマンドの組とに基づいて、差分値を決定する手段と、
前記公称アップリンク伝送レートと前記差分値とに基づいて、アップリンク伝送レートを選択する手段とを具備する端末。 - サービングノードから前記第1の電力制御コマンドの組を受信し、最高のアップリンク伝送SNRを有する第2のノードから前記第2の電力制御コマンドの組を受信する手段をさらに具備する請求項6記載の端末。
- 端末に通信可能に結合されているメモリであって、
請求項1記載の方法のステップを実行するために、デジタル情報を解釈することができるプログラムコードを含むメモリ。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/367,498 US7493132B2 (en) | 2003-02-14 | 2003-02-14 | System and method for uplink rate selection |
PCT/US2004/004671 WO2004075473A1 (en) | 2003-02-14 | 2004-02-17 | System and method for uplink rate selection during soft handover |
Publications (2)
Publication Number | Publication Date |
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JP2006518163A JP2006518163A (ja) | 2006-08-03 |
JP4426568B2 true JP4426568B2 (ja) | 2010-03-03 |
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JP2006503645A Expired - Lifetime JP4426568B2 (ja) | 2003-02-14 | 2004-02-17 | ソフトウェアハンドオーバ間のアップリンクレートを選択するシステム及び方法 |
Country Status (15)
Country | Link |
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US (1) | US7493132B2 (ja) |
EP (1) | EP1593223B1 (ja) |
JP (1) | JP4426568B2 (ja) |
KR (1) | KR101041759B1 (ja) |
CN (1) | CN1751467B (ja) |
AT (1) | ATE368333T1 (ja) |
AU (1) | AU2004213983A1 (ja) |
BR (1) | BRPI0407470A (ja) |
CA (1) | CA2515837A1 (ja) |
DE (1) | DE602004007765T2 (ja) |
MX (1) | MXPA05008625A (ja) |
RU (1) | RU2005128547A (ja) |
TW (1) | TW200428803A (ja) |
UA (1) | UA84698C2 (ja) |
WO (1) | WO2004075473A1 (ja) |
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EP1593223B1 (en) | 2007-07-25 |
WO2004075473A1 (en) | 2004-09-02 |
CA2515837A1 (en) | 2004-09-02 |
US20060105796A1 (en) | 2006-05-18 |
ATE368333T1 (de) | 2007-08-15 |
CN1751467B (zh) | 2010-12-08 |
RU2005128547A (ru) | 2006-02-10 |
TW200428803A (en) | 2004-12-16 |
MXPA05008625A (es) | 2005-11-04 |
DE602004007765D1 (de) | 2007-09-06 |
EP1593223A1 (en) | 2005-11-09 |
KR20050094484A (ko) | 2005-09-27 |
DE602004007765T2 (de) | 2008-04-30 |
JP2006518163A (ja) | 2006-08-03 |
CN1751467A (zh) | 2006-03-22 |
BRPI0407470A (pt) | 2006-02-07 |
UA84698C2 (ru) | 2008-11-25 |
KR101041759B1 (ko) | 2011-06-17 |
AU2004213983A1 (en) | 2004-09-02 |
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