WO2004054135A1 - Improved path loss measurements in wireless communications - Google Patents

Improved path loss measurements in wireless communications Download PDF

Info

Publication number
WO2004054135A1
WO2004054135A1 PCT/US2003/039459 US0339459W WO2004054135A1 WO 2004054135 A1 WO2004054135 A1 WO 2004054135A1 US 0339459 W US0339459 W US 0339459W WO 2004054135 A1 WO2004054135 A1 WO 2004054135A1
Authority
WO
WIPO (PCT)
Prior art keywords
path loss
channel
timeslot
measurements
power
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.)
Ceased
Application number
PCT/US2003/039459
Other languages
English (en)
French (fr)
Inventor
Sung-Hyuk Shin
Marian Rudolf
Stephen G. Dick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
InterDigital Technology Corp
Original Assignee
InterDigital Technology Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE60328525T priority Critical patent/DE60328525D1/de
Priority to CA002509640A priority patent/CA2509640A1/en
Priority to JP2004558704A priority patent/JP4546254B2/ja
Priority to CN200380105914.4A priority patent/CN1726662B/zh
Priority to MXPA05006218A priority patent/MXPA05006218A/es
Priority to BR0316762-3A priority patent/BR0316762A/pt
Priority to AU2003299605A priority patent/AU2003299605A1/en
Priority to EP03799895A priority patent/EP1579602B1/en
Application filed by InterDigital Technology Corp filed Critical InterDigital Technology Corp
Priority to AT03799895T priority patent/ATE437484T1/de
Publication of WO2004054135A1 publication Critical patent/WO2004054135A1/en
Priority to IL169102A priority patent/IL169102A0/en
Anticipated expiration legal-status Critical
Priority to NO20053256A priority patent/NO20053256L/no
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H04B17/327—Received signal code power [RSCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2609—Arrangements for range control, e.g. by using remote antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/10—Open loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/228—TPC being performed according to specific parameters taking into account previous information or commands using past power values or information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [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
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [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
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure

Definitions

  • the present invention generally relates to path loss measurements in wireless communications. More particularly, the invention pertains to a method and apparatus for obtaining path loss measurements using several channels to perform open loop power control.
  • UL uplink
  • DL downlink
  • the power of the transmission may vary greatly both between timeslots, or even within a timeslot.
  • This power variation is affected by various factors, most notably the physical movement of the WTRU. For example, if a WTRU is moving at a moderate pace, such as 60 km/h, it is possible to lose significant signal power in several tens of milliseconds. If a radio frame is 10 s long, this means that significant signal variations can occur even within the frame.
  • the WTRU measures the received signal code power (RSCP) of the serving cell's primary common control physical channel (P-CCPCH) or other beacon channel each frame or sub-frame, and calculates the path loss between the Node B and the WTRU.
  • RSCP received signal code power
  • P-CCPCH primary common control physical channel
  • the path loss measurement based on the RSCP is used to determine the transmit power for UL physical channels.
  • UL physical channels include the physical random access channel (PRACH), the dedicated physical channel (DPCH), the physical uplink shared channel (PUSCH), and the high speed shared information channel (HS-SICH).
  • TD-SCDMA systems In TDD systems, open-loop power control for UL transmissions based upon DL path loss estimations is commonly employed.
  • TD-SCDMA systems usually employ an open-loop power control for setting of UL initial transmission power before transitioning into closed-loop power control mode, or for reverting back into open-loop power control mode.
  • a determination of power requirements on a channel is made in an environment in which DL signals have a time separation from UL signals. Measurement of a beacon channel and at least one additional channel are taken and the path loss for each channel is then calculated. The calculated path loss is then applied to a subsequent UL timeslot. In one particular embodiment of the invention, further path loss calculations are performed in subsequent DL timeslots. These further path loss calculations and the previous path loss calculations are combined and applied to subsequent UL timeslots.
  • Figure 1 is a communication frame having a plurality of time slots.
  • Figure 2 is flow diagram of a method for performing path loss measurements and transmission power settings in accordance with the present invention.
  • Figure 3 is a flow diagram of a method for performing path loss measurements and transmission power settings in accordance with an alternate embodiment of the invention.
  • the present invention provides an improved channel estimation method using several DL channels, wherein path loss (PL) measurements are made on these several DL channels such that time duration is minimized between: a) the reception and measurement of the DL reference signal at the WTRU and computation of a UL power setting; and b) the UL timeslot where the computed power setting is applied.
  • the path loss measurements are determined by measuring the power of a received DL signal, obtaining the transmission power of the received signal and calculating the difference between the transmitted power and the received power.
  • a path loss (PLi) (i corresponding to the numbering of frames) is calculated.
  • the path loss that is used for setting the WTRU transmission power in the UL timeslot is a function of the DL-UL timeslot separation.
  • the path loss value can either correspond to the last PLi obtained if the separation between the DL and UL timeslots is very small; or to a weighted average of several past PLiS (i.e., based on the most recent path loss obtained in the current frame plus several path losses computed for previous frames), if the duration of the DL and UL timeslot separation is large.
  • the measurement of received signal code power (RSCP) of at least one other transmitted channel is used in addition to the RSCP of a beacon channel, such as the Primary Common Control Physical Channel (P-CCPCH) or the High Speed Physical Downlink Shared Channel (HS-PDSCH).
  • RSCP received signal code power
  • P-CCPCH Primary Common Control Physical Channel
  • HS-PDSCH High Speed Physical Downlink Shared Channel
  • the transmission power of the received signal in accordance with the present invention may be obtained in two ways: 1) it is either a fixed value that is known to the WTRU; or 2) it is provided as a value by the transmitter to the receiver. If the measured signal is at a fixed value known to the WTRU, the RSCP of the signal is measured and the path loss for the measured signal is calculated based on that known transmission power value. If the measured signal is not at a known fixed value, either an offset value to a known signal or an actual value is provided by the transmitter to indicate the transmission power.
  • Figure 1 shows the arrangement within a radio frame of multiple channels as represented by multiple timeslots S 0 -SH.
  • This is an example of a typical TDD frame structure comprising several DL channels including beacon channels, HS-PDSCHs and data/voice channels.
  • the illustrated number of timeslots is given by way of example only and the precise number of timeslots will vary according to the transmission standard.
  • each TDD frame comprises fifteen (15) timeslots as shown.
  • the frame structure would look differently.
  • Path loss calculations can be performed on certain DL channels.
  • the radio frame 10 includes two beacon timeslots So and S ; seven implementation specific (i.e., data or voice) timeslots Si, S5, S ⁇ , Ss, S12, Si3, S ⁇ ; and six HS-PDSCH timeslots S 2 , S3, S 4 , S , S10, S11.
  • the Node B transmits multiple DL channels to the WTRU (step 102).
  • the WTRU receives the multiple DL channels from the Node B (step 104).
  • the WTRU measures the RSCP on a beacon channel (step 106) and measures the RSCP on a physical channel (step 108) whose transmission power is known at the receiver, or the receiver is informed of the transmission power by the transmitter.
  • steps 106 and 108 need not necessarily be performed as shown in Figure 2; step 108 may be performed before step 106 without adverse consequences.
  • the WTRU calculates the path loss based upon both measurements
  • the WTRU then adjusts the UL channel transmission power based upon the combined calculated path loss (step 112) and transmits the UL channel at the adjusted transmission power (step 114).
  • the beacon channel may be any of a plurality of beacon signals including, but not limited to, any type of broadcast channel (BCH), the Primary Common Control Physical Channel (P- CCPCH), the Forward Access Channel (FACH), the Paging Channel (PCH), or the Paging Indicator Channel (PICH).
  • the physical channel may include, but is not limited to, the High Speed Physical Downlink Shared Channel (HS-PDSCH), the secondary Common Control Physical Channel (S-CCPCH), the High Speed Physical Downlink Shared Channel (HS-PDSCH), or the High Speed Shared Control Channel (HS-SCCH).
  • the first and most simple alternative is calculating the path loss of the most recently occurring DL channel as a basis for determining the UL transmission power. For example, if the beacon channel is in TS0 and TS7, the HS-DSCH is in TS4, and the UL channel (i.e., HS-SICH) is in TS6, this first alternative selects the path loss calculation from the timeslot closest to the UL timeslot; i.e., the HS-PDSCH in TS4. If, in a subsequent frame, the UL channel is in TS8, then the path loss calculation is based on the beacon channel in TS7, since it is the most recent timeslot.
  • a second alternative is to calculate the path loss as a function of the measurements on all the DL channels of the same frame.
  • the function is a weighted average.
  • the function could be a simple average, or some other function.
  • a third alternative is similar to alternative 2, except that the path loss is calculated as a function of the measurements on some or all of the DL channels of the present frame, plus some of the DL channels of previous frames. As those who are skilled in the art would appreciate, a weighted-function may be implemented such that older estimates are weighted less than newer estimates. [0035] Finally, a fourth alternative to calculate the path loss uses the following equation:
  • the transmit power of the HS-PDSCH (Txpwrl) is lOdB less
  • the RSCP measurements for the calculation of path loss are made on as many channels as possible. It should be noted that although the beacon channel is referred to throughout, the invention can utilize channels other than a beacon channel, such as one or more physical channels. A beacon channel is not required.
  • An alternate embodiment of the present invention is shown in
  • steps 208 and 210 are employed to measure the RSCP on a plurality of channels (step 208) and calculate path loss based upon the plurality of measurements (step 210).
  • additional path loss measurements may be obtained from the RSCP of several HS-PDSCHs whose total transmit powers are constant. If the results of the HS-PDSCH measurements are correlated with beacon channel measurement, differences in the measurements are accounted for by the operation of this invention.
  • Benefits from the invention come from two premises: 1) applying the most recent path loss estimate is beneficial, since it is closer in time to the real value and therefore, there is less time for variation of the actual path loss since the last measurement was made; and 2) higher measurement duration per path loss measurement is better for the quality of the path loss estimate. Having more than just a single timeslot available per frame for the path loss estimation permits a closer estimation to the actual path loss value for the other direction link, the UL in the present example.
  • PL measurement in the invention may be accomplished by first introducing the signaling of the power offset between the beacon signal and HS-PDSCH, and then measuring the total RSCP of the HS-PDSCHs.
  • the power control setting in Equation 1 several parameters such as SIR are used to control and adjust the WTRU behavior. These parameters can be individually signaled to the WTRU, such as by RRC signaling, or they can be put on the BCH for all WTRUs in the system. All of the above modifications, as well as other similar modifications and variations, are envisaged to be within the scope of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
PCT/US2003/039459 2002-12-11 2003-12-10 Improved path loss measurements in wireless communications Ceased WO2004054135A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
AU2003299605A AU2003299605A1 (en) 2002-12-11 2003-12-10 Improved path loss measurements in wireless communications
JP2004558704A JP4546254B2 (ja) 2002-12-11 2003-12-10 無線通信の改善されたパス損失測定を行うための方法、および、装置
CN200380105914.4A CN1726662B (zh) 2002-12-11 2003-12-10 无线通信中改善的路径损失测量
MXPA05006218A MXPA05006218A (es) 2002-12-11 2003-12-10 Mediciones de perdida de trayectoria mejoradas en comunicaciones inalambricas.
BR0316762-3A BR0316762A (pt) 2002-12-11 2003-12-10 Medições aprimoradas de perda de trajeto em comunicações sem fio
DE60328525T DE60328525D1 (de) 2002-12-11 2003-12-10 Verbesserte wegverlustmessungen in der drahtlosen kommunikation
CA002509640A CA2509640A1 (en) 2002-12-11 2003-12-10 Improved path loss measurements in wireless communications
EP03799895A EP1579602B1 (en) 2002-12-11 2003-12-10 Improved path loss measurements in wireless communications
AT03799895T ATE437484T1 (de) 2002-12-11 2003-12-10 Verbesserte wegverlustmessungen in der drahtlosen kommunikation
IL169102A IL169102A0 (en) 2002-12-11 2005-06-09 Improved path loss measurements in wireless communications
NO20053256A NO20053256L (no) 2002-12-11 2005-07-01 Forbedrede veitapsmalinger i tradlose kommunikasjoner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43270302P 2002-12-11 2002-12-11
US60/432,703 2002-12-11

Publications (1)

Publication Number Publication Date
WO2004054135A1 true WO2004054135A1 (en) 2004-06-24

Family

ID=32507987

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/039459 Ceased WO2004054135A1 (en) 2002-12-11 2003-12-10 Improved path loss measurements in wireless communications

Country Status (16)

Country Link
US (1) US7372898B2 (https=)
EP (2) EP2099246A1 (https=)
JP (1) JP4546254B2 (https=)
KR (3) KR20100110395A (https=)
CN (2) CN103327522B (https=)
AR (1) AR042364A1 (https=)
AT (1) ATE437484T1 (https=)
AU (1) AU2003299605A1 (https=)
BR (1) BR0316762A (https=)
CA (1) CA2509640A1 (https=)
DE (1) DE60328525D1 (https=)
IL (1) IL169102A0 (https=)
MX (1) MXPA05006218A (https=)
NO (1) NO20053256L (https=)
TW (3) TWI343725B (https=)
WO (1) WO2004054135A1 (https=)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007091546A1 (ja) * 2006-02-08 2007-08-16 Ntt Docomo, Inc. 無線通信システムにおける上りリンクおよび下りリンクのチャネル構成方法
EP1830494A1 (en) * 2006-03-01 2007-09-05 Research In Motion Limited System and method for determining path loss in a radio communication system
WO2008118049A1 (en) * 2007-03-26 2008-10-02 Telefonaktiebolaget Lm Ericsson (Publ) A method and a device for finding imperfections in an rf path
US7489905B2 (en) 2006-03-01 2009-02-10 Research In Motion Limited System for determining RF path loss between an RF source and an RF receiver with hysteresis and related methods
US7505766B2 (en) 2006-03-01 2009-03-17 Research In Motion Limited System for determining conducted radio frequency (RF) receiver sensitivity and related methods
US7555295B2 (en) 2006-03-01 2009-06-30 Research In Motion Limited System for determining radiated radio frequency (RF) receiver sensitivity and related methods
US7555293B2 (en) 2006-03-01 2009-06-30 Research In Motion Limited System for determining RF path loss between an RF source and an RF receiver and related methods
US7555294B2 (en) 2006-03-01 2009-06-30 Research In Motion Limited System for determining total isotropic sensitivity (TIS) and related methods
WO2009120126A1 (en) * 2008-03-27 2009-10-01 Telefonaktiebolaget L M Ericsson (Publ) Uplink power control in a tdd communication system
FR2941127A1 (fr) * 2009-01-14 2010-07-16 Canon Kk Procedes de configuration de parametres de puissance d'emission en mode point-a-point dans un reseau de communication, produit programme d'ordinateur, moyen de stockage et noeuds correspondants
US8170489B2 (en) 2008-06-04 2012-05-01 Research In Motion Limited System and methods for determining radiated radio frequency (RF) receiver sensitivity
CN101034917B (zh) * 2006-03-01 2012-11-28 捷讯研究有限公司 确定rf源与具有滞后的rf接收机之间的rf路径损耗的系统及相关方法
US8345578B2 (en) 2009-01-14 2013-01-01 Canon Kabushiki Kaisha Methods for configuring sender and receiver antennas, corresponding storage means and nodes
EP2323299A4 (en) * 2008-08-27 2013-11-06 Ntt Docomo Inc MOBILE STATION AND MOBILE COMMUNICATION PROCESS
US8908616B2 (en) 2010-07-15 2014-12-09 Canon Kabushiki Kaisha Methods and devices for transmitting and receiving data signals in a wireless network over a plurality of transmission paths
WO2015171296A1 (en) * 2014-05-07 2015-11-12 Qualcomm Incorporated Maximum pathloss measurement for broadcast communication
EP3062568A1 (en) * 2012-04-06 2016-08-31 NTT DoCoMo, Inc. Radio communication method, local area base station apparatus, mobile terminal apparatus and radio communication system
US9490945B2 (en) 2009-03-17 2016-11-08 Htc Corporation Method of establishing multiple links with multiple component carriers
EP3694262A1 (en) * 2006-10-03 2020-08-12 InterDigital Technology Corporation Combined open loop/closed lopp (cqi-based) uplink transmit power control with interference mitigation for e-utra
WO2021118991A1 (en) * 2019-12-13 2021-06-17 Qualcomm Incorporated Reduction of path loss (pl) reference signal (rs) application time

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6597723B1 (en) * 2000-03-21 2003-07-22 Interdigital Technology Corporation Weighted open loop power control in a time division duplex communication system
US6978151B2 (en) * 2001-05-10 2005-12-20 Koninklijke Philips Electronics N.V. Updating path loss estimation for power control and link adaptation in IEEE 802.11h WLAN
WO2005022798A1 (en) 2003-08-25 2005-03-10 Interdigital Technology Corporation Enhanced uplink operation in soft handover
US7046648B2 (en) 2003-11-05 2006-05-16 Interdigital Technology Corporation Wireless communication method and apparatus for coordinating Node-B's and supporting enhanced uplink transmissions during handover
TW200721861A (en) * 2005-09-09 2007-06-01 Nokia Corp Use of measurement pilot for radio measurement in a wireless network
US8009639B2 (en) * 2006-12-27 2011-08-30 Wireless Technology Solutions Llc Feedback control in an FDD TDD-CDMA system
KR101397135B1 (ko) * 2007-03-07 2014-05-22 인터디지탈 테크날러지 코포레이션 이동국의 업링크 전력을 제어하기 위한 결합형 개방 루프/폐쇄 루프 방법
KR100926363B1 (ko) * 2007-08-23 2009-11-10 주식회사 케이티 링크 균형 확인 장치 및 그 방법
WO2009031953A1 (en) * 2007-09-04 2009-03-12 Telefonaktiebolaget Lm Ericsson (Publ) Improved signal quality measurement in a time division duplex system
KR101278031B1 (ko) 2008-12-22 2013-06-21 한국전자통신연구원 병렬 자동 주파수 오프셋 추정장치 및 방법
JP2010220214A (ja) * 2009-03-17 2010-09-30 Kotatsu Kokusai Denshi Kofun Yugenkoshi 多重コンポーネント・キャリアで多重リンクを設立する方法及び関連する通信装置
US9730164B2 (en) 2012-01-30 2017-08-08 Qualcomm, Incorporated Power control management in uplink (UL) coordinated multipoint (CoMP) transmission
US20140029582A1 (en) * 2012-07-27 2014-01-30 Qualcomm Incorporated Method and apparatus for a power control mechanism
US9179244B2 (en) * 2012-08-31 2015-11-03 Apple Inc. Proximity and tap detection using a wireless system
US20160270102A1 (en) 2015-03-14 2016-09-15 Qualcomm Incorporated Distributed scheduling to control interference for data transactions using grant-less transmissions
US9253727B1 (en) * 2015-05-01 2016-02-02 Link Labs, Inc. Adaptive transmission energy consumption
JP2016105636A (ja) * 2016-02-01 2016-06-09 株式会社Ｎｔｔドコモ 移動端末装置、無線基地局及び無線通信方法
WO2018187977A1 (zh) * 2017-04-12 2018-10-18 Oppo广东移动通信有限公司 上行功率控制方法、设备及系统
CN111148205B (zh) * 2018-11-02 2022-03-25 华为技术有限公司 发送功率的确定方法和装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020085504A1 (en) * 2000-03-21 2002-07-04 Interdigital Technology Corporation Base station utilizing a weighted open loop power control
US20020168994A1 (en) * 2001-05-14 2002-11-14 Interdigital Technology Corporation Common control channel uplink power control for adaptive modulation and coding techniques
US20030109274A1 (en) * 2001-11-20 2003-06-12 Budka Kenneth C. Uplink power control algorithm
US20040022230A1 (en) * 2000-03-22 2004-02-05 Interdigital Technology Corporation User equipment employing a time division duplex technique

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6101179A (en) * 1997-09-19 2000-08-08 Qualcomm Incorporated Accurate open loop power control in a code division multiple access communication system
JP3821331B2 (ja) * 1997-10-31 2006-09-13 ソニー株式会社 通信端末装置及びセルラー無線通信システム並びに情報通信方法
MY129851A (en) * 1999-03-22 2007-05-31 Interdigital Tech Corp Weighted open loop power control in a time division duplex communication system
ATE441301T1 (de) * 1999-07-09 2009-09-15 Sony Deutschland Gmbh Zellreichweiten-erweiterung in radiokommunikationssystemen mit leistungsregelung der abwärtsrichtung
DE69936990T2 (de) * 1999-10-06 2008-01-10 Matsushita Electric Industrial Co., Ltd., Kadoma Ortungssystem für ein Mobiltelefonnetz
US20030108274A1 (en) * 2000-08-22 2003-06-12 Dan Haronian Mode coupled optomechanical devices
CN1162997C (zh) * 2000-10-04 2004-08-18 三星电子株式会社 用于移动通信系统中下行链路共享信道的功率控制的装置和方法
US7151740B2 (en) * 2001-02-28 2006-12-19 Cingular Wireless Ii, Llc Transmit power control for an OFDM-based wireless communication system
EP1261147A1 (en) * 2001-05-21 2002-11-27 Motorola, Inc. A method and system for simultaneous bi-directional wireless communication between a user station and first and second base stations
GB2381417A (en) * 2001-10-24 2003-04-30 Ipwireless Inc Transmission power control based on path loss
RU2231927C1 (ru) 2002-11-22 2004-06-27 Федеральное государственное унитарное предприятие Научно-производственное предприятие "Полет" Способ радиосвязи с подвижными объектами

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020085504A1 (en) * 2000-03-21 2002-07-04 Interdigital Technology Corporation Base station utilizing a weighted open loop power control
US20040022230A1 (en) * 2000-03-22 2004-02-05 Interdigital Technology Corporation User equipment employing a time division duplex technique
US20020168994A1 (en) * 2001-05-14 2002-11-14 Interdigital Technology Corporation Common control channel uplink power control for adaptive modulation and coding techniques
US20030109274A1 (en) * 2001-11-20 2003-06-12 Budka Kenneth C. Uplink power control algorithm

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007091546A1 (ja) * 2006-02-08 2007-08-16 Ntt Docomo, Inc. 無線通信システムにおける上りリンクおよび下りリンクのチャネル構成方法
US8018896B2 (en) 2006-02-08 2011-09-13 Ntt Docomo, Inc. Uplink and downlink channel configuration method in radio communication system
EP1830494A1 (en) * 2006-03-01 2007-09-05 Research In Motion Limited System and method for determining path loss in a radio communication system
AU2007200716B2 (en) * 2006-03-01 2008-07-31 Blackberry Limited System for determining RF path loss between an RF source and an RF receiver and related methods
US7489905B2 (en) 2006-03-01 2009-02-10 Research In Motion Limited System for determining RF path loss between an RF source and an RF receiver with hysteresis and related methods
US7505766B2 (en) 2006-03-01 2009-03-17 Research In Motion Limited System for determining conducted radio frequency (RF) receiver sensitivity and related methods
US7555295B2 (en) 2006-03-01 2009-06-30 Research In Motion Limited System for determining radiated radio frequency (RF) receiver sensitivity and related methods
US7555293B2 (en) 2006-03-01 2009-06-30 Research In Motion Limited System for determining RF path loss between an RF source and an RF receiver and related methods
US7555294B2 (en) 2006-03-01 2009-06-30 Research In Motion Limited System for determining total isotropic sensitivity (TIS) and related methods
CN101034917B (zh) * 2006-03-01 2012-11-28 捷讯研究有限公司 确定rf源与具有滞后的rf接收机之间的rf路径损耗的系统及相关方法
EP3694262A1 (en) * 2006-10-03 2020-08-12 InterDigital Technology Corporation Combined open loop/closed lopp (cqi-based) uplink transmit power control with interference mitigation for e-utra
US10880842B2 (en) 2006-10-03 2020-12-29 Interdigital Technology Corporation Combined open loop/closed loop (CQI-based) uplink transmit power control with interference mitigation for E-UTRA
WO2008118049A1 (en) * 2007-03-26 2008-10-02 Telefonaktiebolaget Lm Ericsson (Publ) A method and a device for finding imperfections in an rf path
US8811928B2 (en) 2007-03-26 2014-08-19 Telefonaktiebolaget L M Ericsson (Publ) Method and a device for finding imperfections in an RF path
WO2009120126A1 (en) * 2008-03-27 2009-10-01 Telefonaktiebolaget L M Ericsson (Publ) Uplink power control in a tdd communication system
US8548389B2 (en) 2008-06-04 2013-10-01 Blackberry Limited System and methods for determining radiated radio frequency (RF) receiver sensitivity
US8326232B2 (en) 2008-06-04 2012-12-04 Research In Motion Limited System and methods for determining radiated radio frequency (RF) receiver sensitivity
US8170489B2 (en) 2008-06-04 2012-05-01 Research In Motion Limited System and methods for determining radiated radio frequency (RF) receiver sensitivity
EP2323299A4 (en) * 2008-08-27 2013-11-06 Ntt Docomo Inc MOBILE STATION AND MOBILE COMMUNICATION PROCESS
US8345578B2 (en) 2009-01-14 2013-01-01 Canon Kabushiki Kaisha Methods for configuring sender and receiver antennas, corresponding storage means and nodes
FR2941127A1 (fr) * 2009-01-14 2010-07-16 Canon Kk Procedes de configuration de parametres de puissance d'emission en mode point-a-point dans un reseau de communication, produit programme d'ordinateur, moyen de stockage et noeuds correspondants
US9490945B2 (en) 2009-03-17 2016-11-08 Htc Corporation Method of establishing multiple links with multiple component carriers
US8908616B2 (en) 2010-07-15 2014-12-09 Canon Kabushiki Kaisha Methods and devices for transmitting and receiving data signals in a wireless network over a plurality of transmission paths
US10721692B2 (en) 2012-04-06 2020-07-21 Ntt Docomo, Inc. Radio communication method, local area base station apparatus, mobile terminal apparatus and radio communication system
EP3062568A1 (en) * 2012-04-06 2016-08-31 NTT DoCoMo, Inc. Radio communication method, local area base station apparatus, mobile terminal apparatus and radio communication system
US9813996B2 (en) 2012-04-06 2017-11-07 Ntt Docomo, Inc. Radio communication method, local area base station apparatus, mobile terminal apparatus and radio communication system
WO2015171296A1 (en) * 2014-05-07 2015-11-12 Qualcomm Incorporated Maximum pathloss measurement for broadcast communication
CN106465286B (zh) * 2014-05-07 2019-10-01 高通股份有限公司 用于广播通信的最大路径损耗测量
US9591587B2 (en) 2014-05-07 2017-03-07 Qualcomm Incorporated Maximum pathloss measurement for broadcast communication
CN106465286A (zh) * 2014-05-07 2017-02-22 高通股份有限公司 用于广播通信的最大路径损耗测量
WO2021118991A1 (en) * 2019-12-13 2021-06-17 Qualcomm Incorporated Reduction of path loss (pl) reference signal (rs) application time
US11743836B2 (en) 2019-12-13 2023-08-29 Qualcomm Incorporated Reduction of path loss (PL) reference signal (RS) application time

Also Published As

Publication number Publication date
CN103327522B (zh) 2016-06-01
CN1726662A (zh) 2006-01-25
CN103327522A (zh) 2013-09-25
EP2099246A1 (en) 2009-09-09
TW200414709A (en) 2004-08-01
KR101025841B1 (ko) 2011-03-30
TWI343725B (en) 2011-06-11
MXPA05006218A (es) 2005-08-19
US20040170132A1 (en) 2004-09-02
BR0316762A (pt) 2005-10-25
AU2003299605A1 (en) 2004-06-30
TW200742313A (en) 2007-11-01
JP2006510260A (ja) 2006-03-23
EP1579602A1 (en) 2005-09-28
TWI249296B (en) 2006-02-11
CN1726662B (zh) 2013-06-19
KR20050099645A (ko) 2005-10-14
EP1579602B1 (en) 2009-07-22
CA2509640A1 (en) 2004-06-24
DE60328525D1 (de) 2009-09-03
ATE437484T1 (de) 2009-08-15
KR20100110395A (ko) 2010-10-12
AR042364A1 (es) 2005-06-15
KR20050091000A (ko) 2005-09-14
NO20053256L (no) 2005-07-01
TWI333343B (en) 2010-11-11
IL169102A0 (en) 2007-07-04
EP1579602A4 (en) 2006-01-18
TW200518501A (en) 2005-06-01
JP4546254B2 (ja) 2010-09-15
US7372898B2 (en) 2008-05-13
KR101025839B1 (ko) 2011-03-30

Similar Documents

Publication Publication Date Title
US7372898B2 (en) Path loss measurements in wireless communications
US7363049B2 (en) Pathloss aided closed loop power control
EP2544490B1 (en) Power control during a transmission pause
EP2374230B1 (en) Method for estimating uplink control channel quality
KR20050099643A (ko) Ｔｄｄ 통신 시스템의 다중 하향 링크 시간 슬롯에 대한하향 링크 전력 제어 시스템 및 방법
JP3411553B2 (ja) セルラー無線システムにおいてダイバーシティー重みを変更する時機を定める方法及び装置
US20170006553A1 (en) Power control method and device
GB2408420A (en) Determining a power relationship linking the transmit powers of user data and associated control data
HK1083279A (en) Improved path loss measurements in wireless communications
GB2644397A (en) Method and apparatus for correcting SRS-based downlink channel estimates based on an indication of whether power relaxation is compensated for an uplink trans
HK1180871B (en) Power control during a transmission pause
HK1180870A (en) Power control during a transmission pause
HK1180871A (en) Power control during a transmission pause

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2457/DELNP/2005

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 169102

Country of ref document: IL

WWE Wipo information: entry into national phase

Ref document number: PA/a/2005/006218

Country of ref document: MX

Ref document number: 2003299605

Country of ref document: AU

Ref document number: 1020057010656

Country of ref document: KR

Ref document number: 2509640

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2004558704

Country of ref document: JP

Ref document number: 20038A59144

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2003799895

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 8888

Country of ref document: GE

WWP Wipo information: published in national office

Ref document number: 1020057010656

Country of ref document: KR

WWP Wipo information: published in national office

Ref document number: 2003799895

Country of ref document: EP

ENP Entry into the national phase

Ref document number: PI0316762

Country of ref document: BR

WWE Wipo information: entry into national phase

Ref document number: 9889

Country of ref document: GE