WO2011035558A1 - Procédé de commande de puissance et équipement pour une rétroaction d'informations de canal - Google Patents

Procédé de commande de puissance et équipement pour une rétroaction d'informations de canal Download PDF

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Publication number
WO2011035558A1
WO2011035558A1 PCT/CN2010/001509 CN2010001509W WO2011035558A1 WO 2011035558 A1 WO2011035558 A1 WO 2011035558A1 CN 2010001509 W CN2010001509 W CN 2010001509W WO 2011035558 A1 WO2011035558 A1 WO 2011035558A1
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WIPO (PCT)
Prior art keywords
feedback channel
power
base station
information
station side
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PCT/CN2010/001509
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English (en)
Chinese (zh)
Inventor
潘学明
沈祖康
肖国军
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大唐移动通信设备有限公司
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Publication of WO2011035558A1 publication Critical patent/WO2011035558A1/fr

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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

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a power control method and apparatus for performing channel information feedback. Background technique
  • the terminal In the 3rd Generation Partnership Project (3GPP) R8 version (Release-8) Long-Term Evolution (LTE), the terminal (UE) needs to feed back channel indication information through the uplink channel (Channel). Quality Indicator, CQI).
  • 3GPP 3rd Generation Partnership Project
  • CQI Quality Indicator
  • eNB can perform downlink dynamic scheduling by using the CQI fed back by the UE.
  • the CQI can be transmitted on a Physical Uplink Control Channel (PUCCH) and can be transmitted on a Physical Uplink Shared Channel (PUSCH).
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • PRB physical resource block
  • RE resource element
  • FIG. 1 is a schematic diagram of a feedback manner of CQI on a PUCCH.
  • Each subframe (lms) consists of a series of Orthogonal Frequency Division Multiplexing (OFDM) symbols. Taking the length of the Cyclic Prefix (CP) as an example, one subframe is composed of two slots, and each slot contains 7 OFDM symbols.
  • OFDM Orthogonal Frequency Division Multiplexing
  • CP Cyclic Prefix
  • CDM Code Division Multiplexing
  • PRB up to 12 UEs can simultaneously transmit their respective CQIs.
  • There are two OFDM symbols in each slot as pilots (RS) and five symbols are used to transmit CQI data.
  • RS pilots
  • Quadrature Phase Shift Keying (Quadature Phase Shift Keying, QPSK) Transmits two-bit channel encoded CQI data. Therefore, in 3GPP LTE, each UE can transmit 20 CQI encoded data through PUCCH in one subframe.
  • the information bits of the CQI on the PUCCH are at most 11 bits.
  • the transmission mode of PUCCH CQI of Rel-8 cannot effectively support the demand of CQI feedback. If the PUSCH CQI transmission mode of Rel-8 is used, since one PRB can only give one UE, the CQI feedback overhead will increase. Considering that the coded data of Rel-8 PUCCH CQI is 20 bits and the coded data of Rel-8 PUSCH CQI is 288 bits, it is necessary to design a new transmission mode for CQI feedback in 3GPP LTE-A. The new CQI transmission method needs to effectively support the size of multiple encoded CQI blocks while minimizing the overhead of CQI feedback.
  • the applicant has proposed a number of new physical channel structures for transmitting multi-user channel quality indication information in the Chinese patent application file No. 200910091275.X, including: When at least two user terminals use the same time The frequency resource sends respective channel quality indication information, where the time-frequency resource includes at least one frequency domain unit in the frequency domain, and includes at least two data time domain unit sets in the time domain, and each data time domain unit set includes at least two Data time domain units, and channel quality indication information of each user terminal is transmitted on the at least one data time domain unit set by using time domain code division multiple access.
  • the LTE-A or the subsequent evolution system supports the above one or simultaneously supports multiple feedback channel structures, providing different feedbacks.
  • Capacity support that is, between PUCCH 20 bits and PUSCH 288 bits provided by R8, improving uplink transmission efficiency.
  • the new feedback channel structure is a code-based multi-user multiplexing design
  • uplink power control technology is needed to ensure good orthogonality between users, while reducing UE power consumption and neighbor cell interference, but there is no new Power control scheme for physical channel structure.
  • Summary of the invention provides a power control method and apparatus for performing channel information feedback, which is used to implement power control when transmitting multi-user channel quality indication information based on code division.
  • the base station side sends the determined maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information to the terminal station side to generate power according to the received uplink signal quality. Controlling the command word and transmitting the power control command word to the terminal.
  • a first sending unit configured to send the determined maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information
  • a second sending unit configured to send the expected received power information of the determined feedback channel on the base station side
  • a power command word sending unit configured to generate a power control command word according to the received uplink signal quality, and send the power control command word to the terminal.
  • a power determining method for performing channel information feedback includes: receiving, by a terminal side, a maximum allowed transmit power information of a terminal transmitted by a base station, a desired received power information of a feedback channel at a base station side, a path loss compensation factor, and a feedback.
  • the channel format related adjustment quantity information terminal side measures the downlink signal path loss, and receives the power control command word sent by the base station side, according to the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, and the path loss.
  • the compensation factor, the feedback channel format related adjustment amount information, the downlink signal path loss, and the power control command word obtain power for transmitting the SC-FDMA symbol.
  • a power determining apparatus for performing channel information feedback includes: a first receiving unit, configured to receive, by a base station side, a maximum allowed transmit power information of a terminal, and a path Diameter loss compensation factor, feedback channel format related adjustment amount information;
  • a second receiving unit configured to receive expected received power information of the feedback channel sent by the base station side on the base station side;
  • a power command word sending unit configured to receive a power control command word sent by the base station side, and a measuring unit, configured to measure a downlink signal path loss;
  • a power determining unit configured to: according to the maximum allowed transmit power information of the terminal, expected receive power information of the feedback channel on the base station side, a path loss compensation factor, feedback channel format related adjustment amount information, the downlink signal path loss, and the power Control command word, get sent
  • the base station side sends the determined power control parameter to the terminal, where the terminal includes the maximum allowed transmit power information, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount.
  • Information The base station side generates a power control command word according to the received uplink signal quality, and sends the power control command word to the terminal.
  • the terminal side receives the power control parameter sent by the base station side, measures the downlink signal path loss, and receives the power control command word sent by the base station side, according to the power control parameter, the downlink signal path loss, and the power control command word. , obtain the power to transmit the SC-FDMA symbol.
  • This embodiment enables power control at a new physical channel structure.
  • FIG. 1 is a schematic diagram of a feedback manner of a CQI on a PUCCH in the prior art
  • FIG. 2 is a schematic flowchart of a power control method for scheduling channel information feedback by a scheduling terminal according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for determining power of channel information feedback according to an embodiment of the present disclosure
  • FIG. 4a is a schematic structural diagram of a physical channel that supports one UE and can transmit 144-bit CQI coded bits of a UE without frequency hopping, which is called Format 1 according to an embodiment of the present disclosure;
  • FIG. 4b is a 144-bit CQI capable of transmitting a UE by supporting one UE according to an embodiment of the present invention.
  • Coded bit a schematic diagram of a physical channel structure with frequency hopping, called Format 1;
  • FIG. 4c is a schematic structural diagram of a physical channel that supports one UE and can transmit 288-bit CQI coded bits of a UE without frequency hopping, which is called Format la;
  • FIG. 5a is a schematic diagram of an embodiment of the present invention for supporting two UEs and transmitting 144-bit CQI coded bits of each UE, without frequency hopping, which is called Format 2;
  • FIG. 5b is a schematic diagram of an embodiment of the present invention for supporting two UEs, which can transmit 144-bit CQI coded bits of each UE, and has frequency hopping, which is called Format 2;
  • FIG. 5c is a schematic diagram of an embodiment of the present invention for supporting two UEs, which can transmit 72-bit CQI coded bits of each UE, and has no frequency hopping, and is called Format 2a;
  • Figure 5 is an embodiment of the present invention, which supports two UEs and can transmit 72-bit CQI coded bits of each UE, and has a frequency hopping embodiment, which is called Format 2a;
  • 6a is an embodiment of the present invention, which supports three UEs and can transmit 96-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 3;
  • FIG. 6b is a schematic diagram of an embodiment of the present invention for supporting three UEs, which can transmit 96-bit CQI coded bits of each UE, and having frequency hopping, which is called Format 3;
  • 6c is an embodiment of the present invention, which supports three UEs and can transmit 48-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 3a;
  • Figure 6 is an embodiment of the present invention, which supports three UEs and can transmit 48-bit CQI coded bits of each UE, and has a frequency hopping embodiment, which is called Format 3a;
  • FIG. 7a is an embodiment of the present invention, which is configured to support six UEs and can transmit 48-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 4;
  • FIG. 7b is a schematic diagram of an embodiment of the present invention for supporting six UEs, which can transmit 48-bit CQI coded bits of each UE, and has frequency hopping, which is called Format 4;
  • Figure 7c is an embodiment of the present invention, which supports six UEs and can transmit 24-bit CQI coded bits of each UE, and has no frequency hopping, which is called Format 4a;
  • FIG. 7 is an embodiment of the present invention, which supports six UEs and can transmit 24-bit CQI coded bits of each UE, and has a frequency hopping embodiment, which is called Format 4a;
  • FIG. 8 is a schematic structural diagram of a power control apparatus for scheduling channel information feedback by a scheduling terminal according to an embodiment of the present disclosure;
  • FIG. 9 is a schematic structural diagram of a power determining apparatus for performing channel information feedback according to an embodiment of the present invention. detailed description
  • a power control method for scheduling channel information feedback by a scheduling terminal includes the following steps:
  • Step 201 The base station side sends the determined power control parameter to the terminal, where the terminal includes the maximum allowed transmit power information, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information.
  • the maximum allowed transmit power information of the terminal is determined according to radio parameters and high layer signaling of the terminal.
  • the base station side transmits the maximum allowed transmit power information, the path loss compensation factor, and the feedback channel format related adjustment amount information of the terminal through the cell broadcast message.
  • the expected received power information of the feedback channel on the base station side may include: expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side and expected received power information of the feedback channel corresponding to the user-specific portion on the base station side.
  • the base station side may send the expected received power information of the feedback channel corresponding to the cell-specific part of the feedback channel on the base station side through the cell broadcast message, and transmit the expected received power information of the feedback channel corresponding to the user-specific part on the base station side through the user-specific high-level signaling.
  • the feedback channel format related adjustment amount information may be: an absolute power compensation amount of each feedback channel format, or a relative power compensation amount defined for a selected one of the feedback channel formats.
  • the method further includes: the base station side transmitting, to the terminal, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.
  • the base station side transmits the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode by using the cell broadcast message.
  • Step 202 The base station side generates a power control command word according to the received uplink signal quality, and sends the power control command word to the terminal.
  • a power determining method for performing channel information feedback includes the following steps:
  • Step 301 The terminal side receives the power control parameters sent by the base station side, including the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information.
  • the terminal side receives the maximum allowed transmit power information, the path loss compensation factor, and the feedback channel format related adjustment amount information of the terminal through the cell broadcast message.
  • the expected received power information of the feedback channel on the base station side includes: expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side and expected received power information of the feedback channel corresponding to the user-specific portion on the base station side.
  • the terminal side receives the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side through the cell broadcast message, and receives the expected received power information of the feedback channel corresponding to the user-specific part of the base station side through the user-specific high-layer signaling.
  • the feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power compensation amount defined for a selected one of the feedback channel formats.
  • the terminal side may also receive, by using the cell broadcast message, the power adjustment amount information when the base station supports the frequency hopping mode for the corresponding feedback channel format.
  • Step 302 The terminal side measures the downlink signal path loss, and when receiving the power control command word sent by the base station side, obtains the sending SC according to the power control parameter, the downlink signal path loss, and the power control command word.
  • the power of the FDMA symbol The power of the FDMA symbol.
  • PCMAX is the maximum allowed transmit power of the UE, and the unit is dBm, which is determined by the radio frequency parameters of the UE and the high layer signaling.
  • P 0 is the expected received power of the feedback channel on the base station side, in dBm, determined by the simulation result and the actual deployment scenario, and configured by higher layer signaling.
  • the Po can also be split into two parts: a cell-specific part P0_norminal and a user-specific part of the PO-UE, wherein the former is sent by the cell broadcast message to all UEs, and the latter is sent by the UE-specific high layer signaling.
  • a F . TM at (for the feedback channel format related adjustment amount, the unit is dB , that is, the power compensation amount for each feedback channel format, all UEs are notified by the cell-specific broadcast message.
  • the specific signaling format design can adopt the absolute power of each format.
  • the amount of compensation can also be defined based on a certain format.
  • FIGS. 7a to 7d are physical channels of Format 4.
  • Format 1 ( A1/A2/A3 ) dB ; Format 2: (B1/B2/B3) dB ; Format 3: (C1/C2/C3) dB; Format 4: (D1/D2/D3) dB.
  • each feedback format defines a set of power compensation amounts
  • each group has three values, or other numbers, and three are only examples, which can be based on the cell channel environment, interference environment, and detection. It is required to select a group from the three groups and notify all users by broadcast message. If multiple feedback formats are supported in the system at the same time, the power adjustment of each feedback format needs to be broadcast simultaneously.
  • Format 1 is taken as the power reference amount. Define the amount of compensation for other formats relative to Format 1.
  • Format 2 (E1/E2/E3) dB; Format 3: (F1/F2/F3) dB; Format 4: (G1/G2/G3) dB repetition
  • each feedback format defines a set of power compensation amounts, each group has three values (may be other numbers, three are just examples), according to The cell channel environment, the interference environment, the detection request, and the like are selected from three, and all users are notified by broadcast messages. If multiple feedback formats are supported in the system at the same time, the power adjustment amount of each feedback format needs to be broadcast at the same time.
  • the power adjustment amount delta_FH related to frequency hopping may be increased, and is sent to the UE according to a protocol specification or based on a cell broadcast manner. If FM is not supported, there is no need to add delta-FH in the above formula, ie:
  • G (il ) is the closed loop power adjustment amount of the i-1 frame, M being integer not less than 1
  • K m is the m-numbered subframe i-th frame before
  • ⁇ is the power control command word.
  • the g(i) adjustment state of the i-th frame is generated by the cumulative sum of the state g(il) of the i-1 frame and the power control command word of the previous M frame, where:
  • TDD Time Division Duplex
  • gii) g(iD + S ⁇ iK PUSCH ) ⁇
  • g( i_i) is the closed-loop power adjustment amount of the i-th frame, which is the power control command word
  • K PUSCH The pre-set value can be specified by the description of the 3GPP specification TS36.213 V8.7.0 version 5 ⁇ 1.1.
  • a scheduling terminal provided by the embodiment of the present invention performs channel information feedback.
  • the power control device includes: a transmitting unit 81 and a power command word transmission 82.
  • the sending unit 81 is configured to send, to the terminal, the determined maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information;
  • the power command word sending unit 82 is configured to generate a power control command word according to the received uplink signal quality, and send the power control command word to the terminal.
  • the expected received power information of the feedback channel on the base station side includes: expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side and expected received power information of the feedback channel corresponding to the user-specific portion on the base station side.
  • the sending unit 81 is configured to send, by using a cell broadcast message, the expected received power information of the feedback channel corresponding to the cell-specific part to the terminal, and send the feedback channel corresponding to the user-specific part to the base station side by using the user-specific high-layer signaling. It is desirable to receive power information.
  • the feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power compensation amount defined for a selected one of the feedback channel formats.
  • the sending unit 81 is configured to send, by using a cell broadcast message, a maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information.
  • the sending unit 81 is further configured to send, to the terminal, power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.
  • the sending unit 81 is configured to send, by using a cell broadcast message, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.
  • a power determining apparatus for performing channel information feedback includes:
  • the receiving unit 91 is configured to receive, by the base station side, the maximum allowed transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount information;
  • a measuring unit 92 configured to measure a downlink signal path loss
  • the power determining unit 93 is configured to: when receiving the power control command word sent by the base station side, according to The maximum allowable transmit power information of the terminal, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, the feedback channel format related adjustment amount information, the downlink signal path loss, and the power control command word, and the sending SC is obtained. - The power of the FDMA symbol.
  • the expected received power information of the feedback channel on the base station side includes: expected received power information of the feedback channel corresponding to the cell-specific portion on the base station side and expected received power information of the feedback channel corresponding to the user-specific portion on the base station side.
  • the receiving unit 91 is configured to receive, by using a cell broadcast message, the expected received power information of the feedback channel corresponding to the cell-specific part on the base station side, and receive the expected received power of the feedback channel corresponding to the user-specific part by the user-specific high-layer signaling on the base station side. information.
  • the feedback channel format related adjustment amount information is: an absolute power compensation amount of each feedback channel format, or a relative power compensation amount defined for a selected one of the feedback channel formats.
  • the receiving unit 91 is configured to receive, by using a cell broadcast message, a maximum allowed transmit power information, a path loss compensation factor, and a feedback channel format related adjustment amount information of the terminal.
  • the receiving unit 91 is further configured to receive power adjustment amount information that is sent by the base station when the corresponding feedback channel format supports the frequency hopping mode.
  • the receiving unit 91 is configured to receive, by using a cell broadcast message, the power adjustment amount information when the corresponding feedback channel format supports the frequency hopping mode.
  • the power determining unit 93 can calculate the power of the transmitted SC-FDMA symbol according to the following formula:
  • P(i) is the SC-FDMA symbol power setting value of the UE in the subframe i, which is fed back in the new feedback channel structure, in units of dBm;
  • P CMA is the maximum allowed transmit power of the UE;
  • P0 is the feedback channel.
  • "* is the path loss compensation value, in dB, where
  • the power determining unit 93 may also calculate the power for obtaining the transmitted SC-FDMA symbol according to the following formula:
  • P(i) is a per-SC-FDMA symbol power setting value of the UE in the subframe i, which is fed back in a new feedback channel structure, in units of dBm;
  • P CMA x is the maximum allowed transmit power of the UE;
  • Po is a feedback channel.
  • the expected received power at the base station side; is the path loss compensation value, the unit is dB, where PL is the downlink path loss measured by the UE; "is the path loss compensation factor; " ⁇ (for the feedback channel format related adjustment amount, the unit is dB;
  • g(i) is the closed loop power adjustment of the ith frame.
  • the power is determined by the unit 93, when the periodic feedback mode is used,
  • g(il) is the closed-loop power adjustment of the i-1th frame
  • M is an integer not less than 1
  • k m is the number of the mth subframe before the ith frame, which is the power control command word
  • K PUSCH is a preset value, for example: specified by 3GPP TS36.213 V8.7.0 Table 5.1.1.1-1.
  • the base station side sends the determined power control parameter to the terminal, where the terminal includes the maximum allowed transmit power information, the expected received power information of the feedback channel on the base station side, the path loss compensation factor, and the feedback channel format related adjustment amount.
  • Information The base station side generates a power control command word according to the received uplink signal quality, and sends the power control command word to the terminal.
  • the terminal side receives the power control parameter sent by the base station side, measures the downlink signal path loss, and receives the power control command word sent by the base station side, according to the power control parameter, the downlink signal path loss, and the power control command. Word, obtains the power to send SC-FDMA symbols. This embodiment enables power control of the new physical channel structure.
  • the present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention.
  • the flow chart can be implemented by computer program instructions And/or a combination of the processes and/or blocks in the block diagrams, and the flowcharts and/or blocks in the flowcharts and/or block diagrams.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device
  • the instructions provide steps for implementing the functions specified in a block or blocks of a flow or a flow and/or a block diagram of a flowchart.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de commande de puissance et un équipement pour une rétroaction d'informations de canal qui mettent en oeuvre une commande de puissance lorsque des informations d'indicateur de qualité de canal multi-utilisateur basées sur une répartition par codes sont envoyées. Le procédé de commande de puissance pour planifier un renvoi par un terminal d'informations de canal consiste à : envoyer, au terminal, les informations de puissance d'envoi autorisée maximale déterminée du terminal, les informations de puissance de réception attendue du canal de rétroaction côté station de base, le facteur de compensation de perte de trajet et les quantités d'ajustement relatives au format de canal de rétroaction; générer un mot de commande de puissance en fonction de la qualité de signal de liaison montante reçue, et envoyer le mot de commande de puissance au terminal.
PCT/CN2010/001509 2009-09-28 2010-09-28 Procédé de commande de puissance et équipement pour une rétroaction d'informations de canal WO2011035558A1 (fr)

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CN200910235501.7 2009-09-28
CN200910235501.7A CN102014468B (zh) 2009-09-28 2009-09-28 一种进行信道信息反馈的功率控制方法及装置

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CN102740421B (zh) * 2011-04-15 2017-10-27 中兴通讯股份有限公司 一种功率控制方法和系统
CN102300305B (zh) * 2011-09-23 2013-09-04 电信科学技术研究院 一种上行功率控制的方法及装置
IL267295B (en) * 2016-12-13 2022-08-01 Guangdong Oppo Mobile Telecommunications Corp Ltd Method and device for satellite power control
US11057871B2 (en) * 2017-07-28 2021-07-06 Qualcomm Incorporated Frequency hopping in an uplink control channel
CN112673678B (zh) * 2018-09-28 2024-01-23 株式会社Ntt都科摩 用于上行功率控制的方法及设备

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US20080207150A1 (en) * 2007-02-14 2008-08-28 Qualcomm Incorporated Preamble based uplink power control for lte
CN101399578A (zh) * 2007-09-28 2009-04-01 鼎桥通信技术有限公司 上行链路功率控制和同步方法及系统

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CN1893302A (zh) * 2005-07-08 2007-01-10 华为技术有限公司 一种无线通信系统中的功率控制方法、系统和装置
US20080207150A1 (en) * 2007-02-14 2008-08-28 Qualcomm Incorporated Preamble based uplink power control for lte
CN101399578A (zh) * 2007-09-28 2009-04-01 鼎桥通信技术有限公司 上行链路功率控制和同步方法及系统

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