WO2009067892A1 - Procédé, système et dispositif de commande de puissance initiale de station de base - Google Patents

Procédé, système et dispositif de commande de puissance initiale de station de base Download PDF

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Publication number
WO2009067892A1
WO2009067892A1 PCT/CN2008/072960 CN2008072960W WO2009067892A1 WO 2009067892 A1 WO2009067892 A1 WO 2009067892A1 CN 2008072960 W CN2008072960 W CN 2008072960W WO 2009067892 A1 WO2009067892 A1 WO 2009067892A1
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WO
WIPO (PCT)
Prior art keywords
base station
mobile station
path loss
signal strength
target cell
Prior art date
Application number
PCT/CN2008/072960
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English (en)
Chinese (zh)
Inventor
Liwen Zhang
Zhen Li
Original Assignee
Huawei Technologies Co., Ltd.
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
Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Publication of WO2009067892A1 publication Critical patent/WO2009067892A1/fr

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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
    • H04W52/18—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. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/143—Downlink power control
    • 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
    • H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • 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
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Definitions

  • the present invention relates to mobile communication technologies, and in particular, to a base station initial power control method, system and device
  • the received measurement is interpolated, filtered, etc. to process the lost measurement report and eliminate the wild point.
  • the downlink signal strength value received by the processed MS is obtained. Then, the obtained downlink signal strength value received by the MS is compared with the ideal downlink signal strength value received by the MS, and is calculated by a power control algorithm.
  • BTS Base Station, BTS
  • the power level that should be adjusted Thereafter, the base station is notified to perform power transmission according to the power level.
  • the initial measurement reports are discarded to ensure the power control algorithm. stability.
  • An embodiment of the present invention provides a base station initial power control method, apparatus, and system, so as to implement base station power control in an initial stage, reduce interference to the system, and save power consumption of the base station.
  • a base station initial power control method comprising:
  • a base station initial power control device comprising:
  • a path loss calculation module configured to calculate a path loss between the mobile station and the base station
  • a signal strength calculation module configured to predict a downlink signal strength received by the mobile station according to a path loss calculated by the path loss calculation module and a transmit power intensity of a carrier frequency of the call of the mobile station;
  • the power control module is configured to calculate a downlink signal strength predicted by the module according to the signal strength, determine a power strength of the base station to perform initial power transmission, and notify the base station to perform initial power transmission according to the power strength.
  • An initial power control system comprising: a base station controller, a base station, and a mobile station, wherein the base station controller comprises the base station initial power control device described above.
  • the path loss between the mobile station and the base station is calculated, and the mobile station is predicted according to the calculated path loss and the transmit power strength of the allocated carrier frequency of the call.
  • the received downlink signal strength that is, in the initial stage of call access and before the cell handover, indirectly obtains the downlink signal strength information received by the more accurate mobile station, and then determines according to the predicted downlink signal strength information received by the mobile station.
  • the base station performs the power intensity of the initial power transmission, and notifies the base station to perform initial power transmission according to the power strength, thereby implementing power control in the initial stage, reducing interference to the system, and saving power consumption of the base station.
  • Embodiment 1 is an exemplary flowchart of an initial power control method in Embodiment 1 of the present invention
  • FIG. 2 is a schematic structural diagram of an initial power control device according to Embodiment 1 of the present invention.
  • FIG. 3 is still another schematic structural diagram of an initial power control apparatus according to Embodiment 1 of the present invention
  • FIG. 4 is an exemplary flowchart of an initial power control method in Embodiment 2 of the present invention
  • FIG. 5 is a schematic structural diagram of an initial power control apparatus according to Embodiment 2 of the present invention.
  • the downlink measurement report of the channel where the call reported by the MS is located cannot be obtained (ie, the downlink signal strength received by the mobile station) Information) or the obtained measurement information is not accurate enough, etc., by calculating the path loss between the MS and the base station, and using the calculated path loss and the transmission power intensity of the carrier frequency of the channel on which the call is located (referred to as the carrier frequency of the call)
  • the downlink signal strength information received by the MS is predicted, and according to the predicted result, the power strength of the initial power transmission performed by the base station is determined, and the base station is notified to perform initial power transmission according to the power strength.
  • the initial power control system in the embodiment of the present invention includes: a BSC, a base station, and an MS.
  • the BSC is configured to calculate a path loss between the MS and the base station, and predict a downlink signal strength received by the MS according to the calculated path loss and a transmit power strength of a carrier frequency of the channel where the call is located; and receive the downlink according to the MS.
  • Signal strength determining the power strength of the base station for initial power transmission, and notifying the base station to perform initial power transmission according to the power strength.
  • FIG. 1 is a flowchart of an initial power control method in Embodiment 1 of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step 101 Receive a signal strength of the BCCH of the target cell received by the MS reported by the MS (Rxlev_B)
  • the MS reports the signal strength of the received BCCH of the target cell to the BSC through the measurement report, so that the BSC decides whether to perform handover according to the measurement report, and the BSC according to the measurement.
  • the quantity report records the signal strength of the BCCH of the target cell received by the MS to facilitate subsequent path loss calculation.
  • Step 102 The BSC obtains a path loss between the MS and the target base station according to the measurement report of the signal strength of the BCCH of the target cell that is received by the MS and the transmit power strength of the carrier frequency of the BCCH of the target cell.
  • the path loss between the MS and the target base station can be calculated according to the following formula:
  • Path loss transmit power strength of the carrier frequency of the BCCH of the target cell - signal strength of the BCCH of the target cell received by the MS
  • the target cell to be switched is a multi-band cell
  • the carrier frequency of the BCCH of the target cell and the carrier frequency of the call are in different frequency bands
  • Path loss transmit power strength of the carrier frequency of the BCCH of the target cell - Target cell received by the MS
  • Step 103 Predict the downlink signal strength received by the mobile station according to the path loss and the transmit power strength of the carrier frequency of the call of the mobile station.
  • the BSC can predict the downlink signal strength received by the MS according to the transmit power of the carrier frequency of the channel on which the call is located and the path loss, as shown in the following formula:
  • Step 104 Determine, according to the downlink signal strength received by the MS, the power strength of the base station to perform initial power transmission, and notify the base station to perform initial power transmission according to the power strength.
  • the implementation process of this step may be consistent with the implementation process in the prior art, that is, the BSC compares the predicted downlink signal strength received by the MS with the ideal downlink signal strength received by the MS, and uses a power control algorithm. Calculate the power strength that the base station should adjust. For example, the power level that the base station should adjust to can be calculated, and the base station is notified to perform initial power transmission according to the power level. [43] Considering that the MS performs cell handover, the BSC first activates the traffic channel of the target cell to which the MS applies (Traffic
  • the TCH ⁇ of the target cell to be applied may be activated, and the initial power control may be performed by using the foregoing method, so that the base station performs transmission according to an appropriate power; or after the MS successfully switches to the target cell, the foregoing method is used.
  • Initial power control allows the base station to transmit at the appropriate power. That is, after calculating the power strength that the base station should adjust to, the TCH ⁇ of the target cell that the MS applies for is activated, and the base station is notified to transmit according to the power strength to be adjusted; or the MS can successfully switch to the target cell. The base station is notified to transmit according to the power strength to be adjusted as described above.
  • power control is performed by switching after the BSC, so that the base station does not need to transmit according to the maximum power, but only needs to transmit with appropriate power, thereby reducing system interference and improving service quality. And reduce the power consumption of the BTS.
  • the measurement report before convergence is convergent, the signal strength is relatively stable, so the power control is more accurate.
  • FIG. 2 is a schematic structural diagram of an initial power control device according to Embodiment 1 of the present invention.
  • the apparatus may include: a path loss calculation module 201, a signal strength calculation module 202, and a power control module 203.
  • the road loss calculation module 201 is configured to calculate a path loss between the mobile station and the base station.
  • the signal strength calculation module 202 is configured to predict the downlink signal strength received by the MS according to the path loss calculated by the path loss calculation module 201 and the transmission power intensity of the carrier frequency of the call.
  • the downlink signal strength received by the MS can be predicted by determining the difference between the transmit power strength and the path loss of the carrier frequency at which the call is located.
  • the path loss calculation module 201 may send the calculated path loss to the signal strength calculation module 202; or the signal strength calculation module 202 actively acquires the path loss calculated by the path loss calculation module 201 from the path loss calculation module 201.
  • the power control module 203 is configured to determine, according to the downlink signal strength received by the MS predicted by the signal strength calculation module 202, the power strength of the initial power transmission performed by the base station, and notify the base station according to the power strength. Perform initial power transmission.
  • the signal strength calculation module 202 may send the downlink signal strength received by the predicted MS to the power control module 203.
  • the power control module 203 actively obtains the MS received by the signal strength calculation module 202 and the MS received by the signal strength calculation module 202. Downstream signal strength.
  • the device in this embodiment may be as shown in FIG. 3, and may further include: a broadcast control channel signal strength receiving module 301, The signal strength of the BCCH of the target cell received by the MS reported by the MS before the cell handover is received, and the signal strength of the target cell BCCH received by the received MS is provided (can be provided actively, or can be obtained in the path loss calculation module 201) Further provided) to the path loss calculation module 201.
  • a broadcast control channel signal strength receiving module 301 The signal strength of the BCCH of the target cell received by the MS reported by the MS before the cell handover is received, and the signal strength of the target cell BCCH received by the received MS is provided (can be provided actively, or can be obtained in the path loss calculation module 201) Further provided) to the path loss calculation module 201.
  • the path loss calculation module 201 calculates the MS and the signal strength of the BCCH of the target cell received by the MS received by the broadcast control channel signal strength receiving module 301 and the transmission power strength of the carrier frequency of the BCCH of the target cell.
  • Path loss between the target base stations which may be the difference between the transmit power strength of the carrier frequency of the BC CH of the target cell and the signal strength of the BCCH of the target cell received by the MS.
  • the apparatus in this embodiment may further include:
  • the loss calculation module 302 is configured to calculate a path loss difference between the carrier frequency of the BCCH and the carrier frequency of the call.
  • the path loss calculation module 201 may be configured according to the signal strength of the target cell BCCH received by the MS from the broadcast control channel signal strength receiving module 301, the transmit power strength of the carrier frequency of the BCCH of the target cell, and the inter-band path loss difference calculation module 302.
  • the path loss the transmit power strength of the carrier frequency of the BCCH of the target cell - the signal strength of the target cell BCCH received by the MS + frequency band The path loss is poor.
  • FIG. 4 is a flowchart showing an exemplary power control method for the initial access port of the MS in the second embodiment of the present invention. As shown in FIG. 4, the process may include the following steps:
  • Step 401 obtaining the actual transmit power of the MS.
  • BSC is available under the Third Generation Partnership Project (Third Generation Partnership) Project, 3GPP) TS
  • the specification in 05.05 calculates the actual transmit power of the MS. For example, after the call is accessed, the MS sends a class update to the BSC (Classmark
  • Update the message to inform the BSC of the relevant information and the BSC can calculate the actual transmit power of the MS according to the power class and other information in the class update message reported by the MS.
  • Step 402 Receive an uplink signal strength measured by the base station reported by the base station.
  • the base station can measure the received uplink signal and report the measurement result to the BSC. After initial call access, the base station can be carried on a separate dedicated control channel (Standalone Dedicated Control)
  • the signal on the CHannel, SDCCH) is measured, and the signal carried on the TCH after the access is completed is measured, and the uplink signal strength received by the base station is obtained and reported to the BSC.
  • the BSC can record the received uplink signal strength of the received base station for subsequent path loss calculation.
  • Step 403 Obtain a path loss between the MS and the base station according to the uplink signal strength measured by the base station and the actual transmit power strength of the MS.
  • the path loss between the MS and the base station can be calculated according to the following formula:
  • Step 404 Predict the downlink signal strength received by the mobile station according to the calculated path loss and the transmit power strength of the carrier frequency of the call.
  • the BSC can predict the downlink signal strength received by the MS according to the transmit power of the carrier at the call and the path loss, as shown in the following equation:
  • Step 405 Determine, according to the predicted downlink signal strength received by the MS, the power strength of the base station to perform initial power transmission, and notify the base station to perform initial power transmission according to the power strength.
  • the implementation process of this step may be consistent with the implementation process in the prior art, that is, the BSC compares the predicted downlink signal strength received by the MS with the ideal downlink signal strength received by the MS, and uses a power control algorithm. Calculate the power level that the base station should adjust to, and inform the base station to perform the initial according to the power level. Power transmission.
  • the BSC first activates the TCH of the current cell requested by the MS, and after receiving the response of the current cell, notifies the MS to access the TCH, thereby completing the call access. Therefore, in this embodiment, the TCH ⁇ applied by the MS may be activated, and the power control may be performed by using the foregoing method, so that the base station performs transmission according to an appropriate power; or after the MS successfully accesses, the power control is performed by using the foregoing method, so that the base station is used. Emit at the appropriate power.
  • the TCH ⁇ of the current cell requested by the MS may be activated, and the base station may be notified to transmit according to the power strength to be adjusted; or the MS may successfully access the network, The base station transmits according to the power intensity to be adjusted as described above.
  • power control is performed after the call is accessed, so that the base station does not need to transmit according to the maximum power, but only needs to transmit with appropriate power, thereby reducing system interference and improving services. Quality, and reduced power consumption of the BTS.
  • the method for initial power control in the second embodiment is described in detail above.
  • the composition and connection relationship of the initial power control device in the second embodiment are basically the same as those in the device shown in FIG. The difference is that, in order to calculate the path loss between the mobile station and the base station, the initial power control device in the second embodiment may further be as shown in FIG. 5.
  • the mobile power station may further include: The transmit power acquisition module 501 and the uplink signal strength receiving module 502.
  • the mobile station transmit power acquisition module 501 is configured to obtain the actual transmit power of the MS call access ⁇ MS, and provide the acquired actual transmit power of the MS to the path loss calculation module 201. Wherein the specific implementation and may be implemented as shown in FIG. 4 described 401 consistent process.
  • the uplink signal strength receiving module 502 is configured to receive the uplink signal strength measured by the base station reported by the base station, and provide the uplink signal strength measured by the received base station to the path loss calculation module 201.
  • the path loss calculation module 201 is configured to calculate the MS according to the uplink signal strength measured by the base station received by the uplink signal strength receiving module 502 and the actual transmit power strength of the MS acquired by the mobile station transmit power acquiring module 501.
  • the mobile station transmit power acquisition module 501 and the uplink signal strength receiving module 502 can respectively send the respective obtained information to the path loss calculation module 201.
  • the path loss calculation module 201 actively acquires the above information from the two modules.
  • the initial power control device in each of the above embodiments may be disposed in the BSC.
  • the initial power control system in the embodiment of the present invention includes: a BSC, a base station, and an MS.
  • the device in the first embodiment or the second embodiment may be provided in the BSC.
  • the subsequent power control is not limited, and the existing power control algorithm can be used in the subsequent power control.

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

Abstract

L'invention porte sur un procédé de commande de puissance initiale de station de base qui comprend les opérations consistant à : calculer un affaiblissement de propagation entre une station mobile et une station de base (102); prédire une intensité de signal de liaison descendante reçue par une station mobile sur la base de l'affaiblissement de propagation et une puissance d'émission d'une fréquence porteuse sur laquelle un appel de la station mobile est placé (103); sur la base de l'intensité de signal de liaison descendante reçue par la station mobile, déterminer la puissance d'émission initiale de la station de base, informer la station de base d'émettre à la puissance initiale selon la puissance (104). L'invention porte également sur un système et un dispositif de commande de puissance initiale. Par obtention indirecte d'informations relativement précises d'intensité de signal de liaison descendante reçue par la station mobile, la proposition technique de l'invention réalise la commande de puissance à l'étape initiale et réduit le brouillage du système et économise la consommation d'énergie de la station de base.
PCT/CN2008/072960 2007-11-09 2008-11-05 Procédé, système et dispositif de commande de puissance initiale de station de base WO2009067892A1 (fr)

Applications Claiming Priority (2)

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CN200710188204.2 2007-11-09
CN2007101882042A CN101159459B (zh) 2007-11-09 2007-11-09 初始功率控制方法、系统及装置

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CN101159459B (zh) * 2007-11-09 2013-02-13 华为技术有限公司 初始功率控制方法、系统及装置
CN101272173B (zh) * 2008-05-09 2012-10-10 中兴通讯股份有限公司 路损补偿因子设置方法
JP5135171B2 (ja) * 2008-11-10 2013-01-30 株式会社エヌ・ティ・ティ・ドコモ 無線基地局、無線装置及び無線装置制御装置
CN101754336B (zh) * 2008-12-17 2012-09-05 中兴通讯股份有限公司 一种基于lte tdd系统的基站省电方法和系统
CN101888689B (zh) * 2009-05-14 2013-06-19 联芯科技有限公司 一种确定PRACH发送功率和响应UpPCH消息的方法及装置
CN103139886B (zh) * 2011-12-05 2018-06-08 中兴通讯股份有限公司 一种控制发射功率的方法及基站控制器
CN102497663B (zh) * 2011-12-13 2014-08-13 北京邮电大学 家庭基站功率控制方法及控制装置
CN103781161A (zh) * 2012-10-25 2014-05-07 中兴通讯股份有限公司 用于远距离覆盖基站的节能方法、装置及系统
CN107231680B (zh) 2016-03-23 2021-04-30 中兴通讯股份有限公司 一种开环功率控制的方法和装置
CN110446237B (zh) * 2018-05-03 2022-01-28 青岛海信移动通信技术股份有限公司 一种网络频段的智能推荐方法及移动终端
CN110234157B (zh) * 2019-04-23 2023-06-13 广州南方卫星导航仪器有限公司 一种数传电台自适应的控制方法
CN112788724A (zh) * 2021-03-08 2021-05-11 中国人民解放军军事科学院战争研究院 一种用于移动网络中的基站功率控制的系统

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