CA2295085A1 - Method and apparatus for downlink power control in macro diversity radio systems - Google Patents
Method and apparatus for downlink power control in macro diversity radio systems Download PDFInfo
- Publication number
- CA2295085A1 CA2295085A1 CA002295085A CA2295085A CA2295085A1 CA 2295085 A1 CA2295085 A1 CA 2295085A1 CA 002295085 A CA002295085 A CA 002295085A CA 2295085 A CA2295085 A CA 2295085A CA 2295085 A1 CA2295085 A1 CA 2295085A1
- Authority
- CA
- Canada
- Prior art keywords
- downlink
- macro diversity
- downlink power
- diversity radio
- power control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
-
- 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
-
- 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
- H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
-
- 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
Abstract
A method and apparatus for controlling an amount of downlink power to be applied in each downlink transmission in a macro diversity radio system. Downlink power level is controlled in response to a quality measurement of a corresponding uplink. In accordance with exemplary embodiments, a path gain or a carrier-to-interference ratio of an uplink is measured at a base station in an active set, and subsequently used to proportionally govern a downlink transmission power level for a corresponding downlink. In such a fashion, each downlink handling a mobile station maintains a desired level of robustness, while avoiding introduction of unnecessary system interference.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/880,746 | 1997-06-23 | ||
US08/880,746 US6104933A (en) | 1997-06-23 | 1997-06-23 | Method and apparatus for control of base stations in macro diversity radio systems |
PCT/SE1998/001169 WO1998059433A2 (en) | 1997-06-23 | 1998-06-16 | Method and apparatus for downlink power control in macro diversity radio systems |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2295085A1 true CA2295085A1 (en) | 1998-12-30 |
CA2295085C CA2295085C (en) | 2007-01-09 |
Family
ID=25376983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002295085A Expired - Lifetime CA2295085C (en) | 1997-06-23 | 1998-06-16 | Method and apparatus for downlink power control in macro diversity radio systems |
Country Status (8)
Country | Link |
---|---|
US (1) | US6104933A (en) |
EP (1) | EP0997008B1 (en) |
JP (1) | JP4138028B2 (en) |
AU (1) | AU7948898A (en) |
CA (1) | CA2295085C (en) |
DE (1) | DE69841958D1 (en) |
TW (1) | TW387176B (en) |
WO (1) | WO1998059433A2 (en) |
Families Citing this family (54)
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US6512925B1 (en) * | 1998-12-03 | 2003-01-28 | Qualcomm, Incorporated | Method and apparatus for controlling transmission power while in soft handoff |
FR2789534B1 (en) * | 1999-02-04 | 2001-06-08 | Cit Alcatel | METHOD OF ESTIMATING THE SIGNAL TO NOISE RATIO OF A DIGITAL SIGNAL RECEIVED BY A RADIO COMMUNICATION RECEIVER |
US6862447B1 (en) * | 1999-02-16 | 2005-03-01 | Lucent Technologies Inc. | Method of making downlink operational measurements in a wireless communication system |
US7076264B2 (en) * | 1999-02-19 | 2006-07-11 | Qualcomm, Inc. | Power control in a cellular system using ES/IO and NT/I0 values |
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US6563810B1 (en) * | 1999-09-30 | 2003-05-13 | Qualcomm Incorporated | Closed loop resource allocation |
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JP3365379B2 (en) | 1999-12-13 | 2003-01-08 | 日本電気株式会社 | Base station selective transmission power control method and base station apparatus |
US6553016B1 (en) * | 1999-12-20 | 2003-04-22 | Telfonaktiebolaget Lm Ericsson (Publ) | Downlink power control at soft handover |
US6512933B1 (en) * | 2000-02-29 | 2003-01-28 | Verizon Laboratories Inc. | Iterative system and method for optimizing CDMA load distribution using reverse interference measurements |
FR2809252B1 (en) | 2000-05-17 | 2003-10-03 | Cit Alcatel | METHOD FOR ADJUSTING TRANSMIT POWER BY BASE STATIONS TRANSMITTING IN MACRO-DIVERSITY |
US8099122B1 (en) | 2000-06-05 | 2012-01-17 | Qualcomm Incorporated | Method and apparatus for improved forward link power control while in soft handoff |
JP3848068B2 (en) * | 2000-09-12 | 2006-11-22 | 株式会社エヌ・ティ・ティ・ドコモ | CDMA radio transmission apparatus, CDMA radio transmission / reception system, transmission power control method for CDMA radio transmission apparatus, and transmission power control method for radio transmission apparatus in CDMA radio transmission / reception system |
US8155096B1 (en) * | 2000-12-01 | 2012-04-10 | Ipr Licensing Inc. | Antenna control system and method |
US7016332B2 (en) * | 2000-12-05 | 2006-03-21 | Science Applications International Corporation | Method and system for a remote downlink transmitter for increasing the capacity of a multiple access interference limited spread-spectrum wireless network |
US7061891B1 (en) | 2001-02-02 | 2006-06-13 | Science Applications International Corporation | Method and system for a remote downlink transmitter for increasing the capacity and downlink capability of a multiple access interference limited spread-spectrum wireless network |
EP1386406A4 (en) | 2001-03-30 | 2009-06-03 | Science Applic Int Corp | Multistage reception of code division multiple access transmissions |
US7961616B2 (en) | 2001-06-07 | 2011-06-14 | Qualcomm Incorporated | Method and apparatus for congestion control in a wireless communication system |
GB2376843B (en) * | 2001-06-18 | 2005-01-12 | Ubinetics Ltd | A transmitter station and a radiotelephone system including a transmitter station |
US7224942B2 (en) | 2001-07-26 | 2007-05-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Communications system employing non-polluting pilot codes |
US6996380B2 (en) * | 2001-07-26 | 2006-02-07 | Ericsson Inc. | Communication system employing transmit macro-diversity |
US20030045297A1 (en) * | 2001-08-24 | 2003-03-06 | Dent Paul W. | Communication system employing channel estimation loop-back signals |
US7209511B2 (en) * | 2001-08-31 | 2007-04-24 | Ericsson Inc. | Interference cancellation in a CDMA receiving system |
US7197282B2 (en) * | 2001-07-26 | 2007-03-27 | Ericsson Inc. | Mobile station loop-back signal processing |
US7006461B2 (en) * | 2001-09-17 | 2006-02-28 | Science Applications International Corporation | Method and system for a channel selective repeater with capacity enhancement in a spread-spectrum wireless network |
KR100533205B1 (en) * | 2001-10-17 | 2005-12-05 | 닛본 덴끼 가부시끼가이샤 | Mobile communication system, communication control method, base station and mobile station to be used in the same |
DE60134677D1 (en) * | 2001-11-16 | 2008-08-14 | Nokia Corp | OPTIMIZING THE DATA TRANSFER IN A RADIO SYSTEM |
US7389112B2 (en) * | 2001-12-07 | 2008-06-17 | Telefonaktiebolaget L M Ericsson (Publ) | Mobile terminal for optimal spectrum utilization in cellular systems |
WO2004002181A1 (en) | 2002-06-25 | 2003-12-31 | Nokia Corporation | Method and system to optimise soft handover gain in networks such as cdma networks |
US7680052B2 (en) * | 2002-12-16 | 2010-03-16 | Qualcomm Incorporated | Closed loop resource allocation |
US7184492B2 (en) * | 2003-02-10 | 2007-02-27 | Ericsson Inc. | Using antenna arrays in multipath environment |
JP4084683B2 (en) * | 2003-03-04 | 2008-04-30 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile communication system, radio control apparatus, base station, and transmission power control method |
CN100372258C (en) * | 2003-03-28 | 2008-02-27 | Ut斯达康(中国)有限公司 | Determination method of reference power in downlink power balance technology in the case of soft hand-off |
US6978139B2 (en) * | 2003-05-16 | 2005-12-20 | Motorola, Inc. | Method and apparatus for performing soft-handoff in a wireless communication system |
FI120570B (en) * | 2003-12-23 | 2009-11-30 | Teliasonera Finland Oyj | Transmission of data at sea |
JP4433208B2 (en) * | 2004-03-01 | 2010-03-17 | 日本電気株式会社 | Radio base station apparatus and transmission power control method |
EP1727296A1 (en) * | 2005-05-23 | 2006-11-29 | Siemens S.p.A. | Method and device for downlink resource allocation for packet transmission of users of radio communication systems |
US8023955B2 (en) | 2005-08-22 | 2011-09-20 | Sony Corporation | Uplink resource allocation to control intercell interference in a wireless communication system |
KR20070047636A (en) * | 2005-11-02 | 2007-05-07 | 삼성전자주식회사 | Method and apparatus for controlling load of reverse link in a wireless communication system |
WO2007083948A1 (en) * | 2006-01-20 | 2007-07-26 | Samsung Electronics Co., Ltd. | Method and apparatus for open loop power control in frequency division multiple access system |
US8032091B2 (en) * | 2007-03-14 | 2011-10-04 | Magnolia Broadband Inc. | Method, apparatus and system for providing transmit diversity feedback during soft handoff |
US8699968B2 (en) | 2007-03-14 | 2014-04-15 | Google Inc. | Using multiple and a single feedback for UE uplink beamforming in soft handoff |
US8194623B2 (en) * | 2008-06-27 | 2012-06-05 | Ntt Docomo, Inc. | Evolving-type user resource structure/channelization with enhanced diversity for OFDMA based time-varying channels |
US8385220B2 (en) * | 2009-02-24 | 2013-02-26 | Eden Rock Communications, Llc | Systems and methods for determining time varying radio frequency isolation characteristics between network cells |
WO2013184051A1 (en) * | 2012-06-05 | 2013-12-12 | Telefonaktiebolaget L M Ericsson (Publ) | Method for selecting antennas to be included in a set of receiving antennas |
EP3780741B1 (en) | 2014-10-08 | 2022-07-06 | Telefonaktiebolaget LM Ericsson (publ) | Handover control |
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US5056109A (en) * | 1989-11-07 | 1991-10-08 | Qualcomm, Inc. | Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system |
US5175867A (en) * | 1991-03-15 | 1992-12-29 | Telefonaktiebolaget L M Ericsson | Neighbor-assisted handoff in a cellular communications system |
US5309503A (en) * | 1991-12-06 | 1994-05-03 | Motorola, Inc. | Dynamic channel assignment in a communication system |
US5345598A (en) * | 1992-04-10 | 1994-09-06 | Ericsson-Ge Mobile Communications Holding, Inc. | Duplex power control system in a communication network |
DE59408295D1 (en) * | 1993-03-19 | 1999-07-01 | Siemens Ag | Method for regulating the transmission power of a mobile station in a cellular mobile radio network |
US5507035A (en) * | 1993-04-30 | 1996-04-09 | International Business Machines Corporation | Diversity transmission strategy in mobile/indoor cellula radio communications |
ZA948133B (en) * | 1993-10-28 | 1996-05-17 | Qualcomm Inc | Method and apparatus for reducing the average transmit power from a sectorized base station |
IT1261365B (en) * | 1993-12-02 | 1996-05-20 | Cselt Centro Studi Lab Telecom | PROCEDURE AND DEVICE FOR THE POWER CONTROL IN THE MOBILE BASE-HALF STATION ROUTE OF A RADIO-MOBILE SYSTEM WITH ACCESS TO CODE DIVISION |
JP2974274B2 (en) * | 1994-05-12 | 1999-11-10 | エヌ・ティ・ティ移動通信網株式会社 | Transmission power control method and transmission power control device |
US5586170A (en) * | 1994-08-19 | 1996-12-17 | Georgia Tech Research Corporation | Cellular devices, systems and methods using intercell macro-diversity and dynamic channel allocation |
US5475870A (en) * | 1994-09-12 | 1995-12-12 | Qualcomm Incorporated | Apparatus and method for adding and removing a base station from a cellular communications system |
US5574466A (en) * | 1995-03-31 | 1996-11-12 | Motorola, Inc. | Method for wireless communication system planning |
AU3260195A (en) * | 1995-08-31 | 1997-03-19 | Nokia Telecommunications Oy | Method and device for controlling transmission power of a radio transmitter in a cellular communication system |
ES2218551T3 (en) * | 1995-08-31 | 2004-11-16 | Nokia Corporation | TRANSFER METHOD AND RADIOCOMMUNICATIONS CELL SYSTEM. |
US5926747A (en) * | 1996-09-05 | 1999-07-20 | Airnet Communications Corp. | Method and apparatus for dynamically optimizing the forward-link transmit power of a broadband multi-carrier radio signal |
US5946621A (en) * | 1996-10-28 | 1999-08-31 | Northern Telecom Limited | Method of optimizing neighbor set during soft handoff of a mobile unit in a CDMA cellular environment |
-
1997
- 1997-06-23 US US08/880,746 patent/US6104933A/en not_active Expired - Lifetime
-
1998
- 1998-06-16 AU AU79488/98A patent/AU7948898A/en not_active Abandoned
- 1998-06-16 DE DE69841958T patent/DE69841958D1/en not_active Expired - Lifetime
- 1998-06-16 EP EP98930004A patent/EP0997008B1/en not_active Expired - Lifetime
- 1998-06-16 CA CA002295085A patent/CA2295085C/en not_active Expired - Lifetime
- 1998-06-16 JP JP50429799A patent/JP4138028B2/en not_active Expired - Lifetime
- 1998-06-16 WO PCT/SE1998/001169 patent/WO1998059433A2/en active Application Filing
- 1998-06-18 TW TW087109745A patent/TW387176B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1998059433A3 (en) | 1999-07-08 |
AU7948898A (en) | 1999-01-04 |
CA2295085C (en) | 2007-01-09 |
JP2002505819A (en) | 2002-02-19 |
EP0997008B1 (en) | 2010-10-20 |
TW387176B (en) | 2000-04-11 |
US6104933A (en) | 2000-08-15 |
DE69841958D1 (en) | 2010-12-02 |
WO1998059433A2 (en) | 1998-12-30 |
JP4138028B2 (en) | 2008-08-20 |
EP0997008A2 (en) | 2000-05-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20180618 |