JP4302639B2 - 送信電力制御方法及び装置 - Google Patents
送信電力制御方法及び装置 Download PDFInfo
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- 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
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- 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
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- 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]
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- 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
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
-
- 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
- H04W52/44—TPC being performed in particular situations in connection with interruption of transmission
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Description
本発明の実施形態は、図面を参照して一例としてのみ説明する。
セルラ式通信システムでは、基地局109、111、113、115と通信装置117、121、125との間の無線リンク119、123、127、129を管理して、所定の通信リンクにより用いられる資源をできるだけ少なくしなければならない。従って、通信装置117、121、125間の通信に起因する干渉の最小化は重要であり、その結果として、できるだけ小さい送信電力を用いることが重要である。必要な送信電力は、瞬間的な伝搬条件に依存するため、送信電力は、その条件に厳密に適合するように動的に制御される。この目的のために、基地局109、111、113、115及び通信装置117、121、125は、電力制御ループを動作させるが、この場合、受信側は、受信品質情報に関する報告を送信側に返信し、それに応じて、送信側は、その送信電力を調整する。
ステップ205に続くステップ207において、基地局及び通信装置は、低電力モードで動作する。基地局は、低送信電力レベルに対応する電力制御データを通信することによってこのモードで動作する。具体的には、基地局は、パワーアップ及びパワーダウン制御メッセージを通信して、通信装置の送信電力が減少するという基準を満たす。
上述した実施形態は、アップリンク電力制御、及び、遠隔通信装置の送信電力の制御に係わることを認識されたい。しかしながら、本発明は、ダウンリンク電力制御及び基地局の送信電力の制御にも同様に適用可能なことが明らかであろう。この場合、制御対象の送信電力は、好適には、通信装置への通信に関連する送信電力である。
Claims (22)
- セルラ式通信システムにおける基地局による通信装置の送信機の電力制御方法であって、
前記基地局と前記通信装置との間の通信の品質パラメータに応じて、電力制御データを決定する段階と、
前記通信装置へ前記電力制御データを送信する段階と、
前記通信装置を含む複数の通信装置の送信確率を決定する段階と、
前記通信装置を含む前記複数の通信装置の予想干渉レベルを決定する段階と、
前記通信装置を含む前記複数の通信装置の送信確率と予想干渉レベルとに基づいて総予想干渉レベルを決定する段階と、
前記総予想干渉レベルがしきい値を超過しているか否かを判断する段階と、
前記総予想干渉レベルがしきい値を超過している場合に、前記通信装置へパワーダウン電力制御データを送信することによって、低電力動作モードに移行させる段階と、
低送信電力レベルに対応する電力制御データを送信することによって、前記低電力モードで動作させる段階と、
前記通信装置へパワーアップ電力制御データを送信することによって、前記低電力モードを終了させる段階と、
を備える方法。 - 請求項1に記載の方法において、前記電力制御はアップリンク電力制御であり、前記電力制御データは前記基地局から前記通信装置へ送信される、方法。
- 請求項1又は2に記載の方法において、前記低送信電力レベルは実質的にゼロである、方法。
- 請求項1〜3のいずれか1項に記載の方法において、前記低電力モードで送信される前記電力制御データはパワーダウン制御値である、方法。
- 請求項1〜4のいずれか1項に記載の方法において、前記低送信電力レベルは、前記通信装置と前記基地局との間の低速データ通信を可能にする、方法。
- 請求項1〜5のいずれか1項に記載の方法において、前記終了する段階は、前記送信電力が前記品質パラメータに応じて決定された電力レベルに相当するまで、パワーアップ電力制御データを送信することを備える、方法。
- 請求項1〜5のいずれか1項に記載の方法において、前記終了する段階は、前記送信電力が前記低電力モードに移行する以前の電力レベルに対応する電力レベルに相当するまで、パワーアップ電力制御データを送信することを備える、方法。
- 請求項1〜7のいずれか1項に記載の方法において、前記低電力モードの期間は、前記通信装置と前記基地局との間の通信に関連するデータ再送信間隔より小さい、方法。
- 請求項1〜8のいずれか1項に記載の方法であって、更に、前記通信装置と前記基地局との間の前記通信の品質レベルに到達できないと判断し、それに応じて、前記通信装置に前記低電力モードに移行させる段階を備える、方法。
- 請求項1〜9のいずれか1項に記載の方法であって、更に、前記送信機の送信電力がしきい値を超過していると判断し、それに応じて、前記通信装置に前記低電力モードに移行させる段階を備える、方法。
- 請求項1〜10のいずれか1項に記載の方法であって、更に、干渉レベルがしきい値を超過していると判断し、それに応じて、前記通信装置に前記低電力モードに移行させる段階を備える、方法。
- 請求項1〜11のいずれか1項に記載の方法であって、更に、伝搬特性がしきい値を超過していると判断し、それに応じて、前記通信装置に前記低電力モードに移行させる段階を備える、方法。
- 請求項12に記載の方法において、前記伝搬特性は、前記通信装置と前記基地局との間の通信をサポートする通信リンクの経路損失である、方法。
- 請求項1〜13のいずれか1項に記載の方法であって、更に、前記低電力モードの期間がしきい値を超過していると判断し、それに応じて、前記通信装置に前記低電力モードを終了させる段階を備える、方法。
- 請求項1〜14のいずれか1項に記載の方法であって、更に、前記通信装置と前記基地局との間のデータ通信の品質特性が改善しつつあると判断し、それに応じて、前記通信装置に前記低電力モードを終了させる段階を備える、方法。
- 請求項1〜15のいずれか1項に記載の方法であって、更に、干渉レベルがしきい値未満であると判断し、それに応じて、前記通信装置に前記低電力モードを終了させる段階を備える、方法。
- 請求項1〜16のいずれか1項に記載の方法であって、更に、伝搬特性がしきい値未満であると判断し、それに応じて、前記通信装置に前記低電力モードを終了させる段階を備える、方法。
- 請求項17に記載の方法において、前記伝搬特性は、前記通信装置と前記基地局との間の通信をサポートする通信リンクの経路損失である、方法。
- 請求項1〜18のいずれか1項に記載の方法において、前記電力制御は、第3世代パートナーシップ・プロジェクト技術仕様TS25.214に基づき行われる、方法。
- 請求項19に記載の方法の実行を可能にするコンピュータ・プログラム。
- 請求項20に記載のコンピュータ・プログラムを備える記録媒体。
- セルラ式通信システムの送信機用の電力制御装置であって、
基地局と通信装置との間の通信の品質パラメータに応じて、電力制御データを決定するための手段と、
前記基地局と前記通信装置との間で前記電力制御データを通信するための手段と、
前記通信装置を含む複数の通信装置の送信確率を決定する手段と、
前記通信装置を含む前記複数の通信装置の予想干渉レベルを決定する手段と、
前記通信装置を含む前記複数の通信装置の送信確率と予想干渉レベルとに基づいて総予想干渉レベルを決定する手段と、
前記総予想干渉レベルがしきい値を超過しているか否かを判断する手段と、
前記判断に基づいて、前記基地局と前記通信装置との間でパワーダウン電力制御データを通信することによって、低電力動作モードに移行する手段と、
低送信電力レベルに対応する電力制御データを通信することによって、前記低電力モードで動作する手段と、
前記基地局と前記通信装置との間でパワーアップ電力制御データを通信することによって、前記低電力モードを終了する手段と、
を備える装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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GB0229397A GB2396523B (en) | 2002-12-17 | 2002-12-17 | Method and apparatus for power control for a transmitter in a cellular communication system |
PCT/EP2003/050812 WO2004056008A1 (en) | 2002-12-17 | 2003-11-10 | Method and apparatus for transmission power control |
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JP2006510313A JP2006510313A (ja) | 2006-03-23 |
JP4302639B2 true JP4302639B2 (ja) | 2009-07-29 |
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US (1) | US7245935B2 (ja) |
JP (1) | JP4302639B2 (ja) |
CN (1) | CN100550674C (ja) |
AU (1) | AU2003298280A1 (ja) |
GB (1) | GB2396523B (ja) |
WO (1) | WO2004056008A1 (ja) |
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US9730228B2 (en) | 2014-08-29 | 2017-08-08 | Corning Optical Communications Wireless Ltd | Individualized gain control of remote uplink band paths in a remote unit in a distributed antenna system (DAS), based on combined uplink power level in the remote unit |
US9420542B2 (en) | 2014-09-25 | 2016-08-16 | Corning Optical Communications Wireless Ltd | System-wide uplink band gain control in a distributed antenna system (DAS), based on per band gain control of remote uplink paths in remote units |
CN114930915A (zh) * | 2020-01-17 | 2022-08-19 | 华为技术有限公司 | 通信方法及装置 |
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US5566366A (en) * | 1994-11-30 | 1996-10-15 | Motorola, Inc. | Method of power conservation in a data communications system |
US6272325B1 (en) * | 1995-07-13 | 2001-08-07 | Globalstar L.P. | Method and apparatus for considering user terminal transmitted power during operation in a plurality of different communication systems |
US5893036A (en) * | 1997-01-30 | 1999-04-06 | Motorola, Inc. | Transmission power control method |
US6236863B1 (en) * | 1997-03-31 | 2001-05-22 | Oki Telecom, Inc. | Comprehensive transmitter power control system for radio telephones |
US6185432B1 (en) * | 1997-10-13 | 2001-02-06 | Qualcomm Incorporated | System and method for selecting power control modes |
US6411799B1 (en) * | 1997-12-04 | 2002-06-25 | Qualcomm Incorporated | Method and apparatus for providing ternary power control in a communication system |
US6285886B1 (en) * | 1999-07-08 | 2001-09-04 | Lucent Technologies Inc. | Method for controlling power for a communications system having multiple traffic channels per subscriber |
US6289228B1 (en) * | 1999-07-20 | 2001-09-11 | Motorola, Inc. | Method and apparatus for reducing power consumption of a communication device |
US6298242B1 (en) * | 1999-07-22 | 2001-10-02 | Qualcomm Inc. | Method and apparatus for reducing frame error rate through signal power adjustment |
GB9919595D0 (en) * | 1999-08-18 | 1999-10-20 | Nokia Telecommunications Oy | Connection control in a communication system |
GB2355887B (en) * | 1999-10-25 | 2004-01-07 | Motorola Ltd | Reduction of transmit power in a mobile station |
EP1244227B1 (en) * | 2001-03-22 | 2005-07-20 | Siemens Mobile Communications S.p.A. | Automatic method for power control and phy mode switching control in adaptive phy mode systems |
US7190964B2 (en) * | 2001-08-20 | 2007-03-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Reverse link power control in 1xEV-DV systems |
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2002
- 2002-12-17 GB GB0229397A patent/GB2396523B/en not_active Expired - Lifetime
-
2003
- 2003-11-10 CN CNB2003801065713A patent/CN100550674C/zh not_active Expired - Lifetime
- 2003-11-10 WO PCT/EP2003/050812 patent/WO2004056008A1/en active Application Filing
- 2003-11-10 US US10/533,280 patent/US7245935B2/en not_active Expired - Lifetime
- 2003-11-10 AU AU2003298280A patent/AU2003298280A1/en not_active Abandoned
- 2003-11-10 JP JP2004560493A patent/JP4302639B2/ja not_active Expired - Lifetime
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GB2396523A (en) | 2004-06-23 |
WO2004056008A1 (en) | 2004-07-01 |
CN100550674C (zh) | 2009-10-14 |
GB0229397D0 (en) | 2003-01-22 |
US20060040696A1 (en) | 2006-02-23 |
GB2396523B (en) | 2006-01-25 |
AU2003298280A1 (en) | 2004-07-09 |
CN1726660A (zh) | 2006-01-25 |
US7245935B2 (en) | 2007-07-17 |
JP2006510313A (ja) | 2006-03-23 |
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