WO2011055555A1 - Dispositif de microstation de base et procédé de commande de puissance d'émission - Google Patents

Dispositif de microstation de base et procédé de commande de puissance d'émission Download PDF

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Publication number
WO2011055555A1
WO2011055555A1 PCT/JP2010/006545 JP2010006545W WO2011055555A1 WO 2011055555 A1 WO2011055555 A1 WO 2011055555A1 JP 2010006545 W JP2010006545 W JP 2010006545W WO 2011055555 A1 WO2011055555 A1 WO 2011055555A1
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WO
WIPO (PCT)
Prior art keywords
base station
path loss
power
small base
henb
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Application number
PCT/JP2010/006545
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English (en)
Japanese (ja)
Inventor
南里将彦
李継峰
大崎吉晴
稲葉伊知郎
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パナソニック株式会社
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Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2011055555A1 publication Critical patent/WO2011055555A1/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
    • H04W52/18—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
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/32—Hierarchical cell structures

Definitions

  • the present invention relates to a small base station apparatus and a transmission power control method.
  • HeNB small base station device
  • femto cell a small base station device
  • MeNB large-scale base station equipment
  • ICIC Inter-Cell-Interference-Coodination
  • HeNB should not interfere with existing MeNB communications. This is because the MeNB is used to form an existing communication area such as a mobile phone, so that the HeNB was installed later to avoid the inconvenience of suddenly becoming unable to connect to the mobile phone. is there.
  • HeNB may be called a home base station and MeNB may be called a macro base station.
  • the processing load of the HUE increases and the battery is driven by a rechargeable battery. The power consumption of the HUE will increase.
  • An object of the present invention is to provide a small base station apparatus and a transmission power control method capable of performing appropriate transmission power control while reducing the power consumption by reducing the processing load of the HUE.
  • a transmission power control method is a transmission power control method in a mobile communication system having a small base station device that forms a smaller cell than a cell formed by a macro base station device, Measure the received power of the downlink signal from the macro base station apparatus, calculate the first path loss between the macro base station apparatus and the small base station apparatus using the received power, and from the communication terminal apparatus And a path loss offset calculated from the first path loss and the second path loss, a calculation means for calculating a second path loss between the communication terminal device and the small base station device Is used to control the transmission power of the uplink signal from the communication terminal apparatus.
  • FIG. 1 shows the configuration of the HeNB
  • FIG. 2 shows a flowchart of the peripheral search mode
  • FIG. 3 shows a flowchart of the main mode.
  • the operation mode in the HeNB includes a peripheral search mode and a main mode.
  • the reception RF unit 114 receives an uplink signal via the antenna 113 and the duplexer 112.
  • the reception switching unit 102 performs reception switching such that the reception signal is output to the symbol timing detection unit 101 and the FFT unit 119 in the peripheral search mode, and the reception signal is output to the FFT unit 116 in the main mode.
  • the PH (Power Headroom) extraction unit 118 extracts the downlink PH included in the PUSCH.
  • the FFT unit 119 performs discrete Fourier transform on the received signal according to the symbol timing detected by the symbol timing detection unit 101.
  • the channel separation unit 120 performs channel separation on the signal after the discrete Fourier transform.
  • the HeNB 100 immediately after power-on, the HeNB 100 enters the peripheral search mode and synchronizes with the downlink of the peripheral MeNB. Specifically, synchronization is achieved through the following three steps (a) to (c).
  • the symbol timing detection unit 101 detects the symbol timing by CP (Cyclic Prefix) correlation calculation in the MeNB downlink using the signal input from the reception switching unit 102 (ST201).
  • CP Cyclic Prefix
  • the subframe timing detection unit 103 performs subframe timing by P-SCH (Primary Synchronization channel) correlation calculation and S-SCH (Secondary Synchronization channel) correlation calculation. It is detected (ST203).
  • P-SCH Primary Synchronization channel
  • S-SCH Secondary Synchronization channel
  • the frame timing detection unit 104 detects frame timing by PBCH (Physical Broadcast Channel) detection (ST205).
  • PBCH Physical Broadcast Channel
  • the control unit 105 regards that the MeNB that causes interference exists, and acquires the cell ID of the MeNB that causes interference. Specifically, the subframe timing detection unit 103 obtains the cell ID from the S-SCH cell ID group number N ID (1) and the P-SCH ID number N ID (2) detected in the process (b). (N ID cell ) is detected by the following equation (ST208).
  • the MIB (Master Information Block) extraction unit 106 extracts the MIB from the PBCH (ST209).
  • the MIB is superimposed on the PBCH and is arranged in the first slot of the first subframe of each frame.
  • SIB (System Information Block) extraction section 107 extracts SIB from PDSCH (Physical Downlink Shared Channel) (ST210).
  • SIB is transmitted by PDSCH, and the transmission timing is specified by MIB.
  • the HeNB 100 collects MeNB base station information included in the SIB.
  • RSRP Reference Signal Received Power measurement section 108 generates a replica (RS replica) of a MeNB downlink reference signal (Reference Signal: RS) based on MeNB base station information (ST211), and this RS replica Then, RSRP is measured from the actually received reference signal (received RS) (ST212 to ST215).
  • RSRP Reference Signal Received Power
  • RSRP measurement section 108 repeats this RSRP measurement up to a predetermined number of measurement subframes N eva (ST213 to ST215), and then performs an averaging process according to the following equation (ST216).
  • RSRP target is an RSRP target value designated in advance by an upper layer.
  • control unit 105 considers that the distance between MeNB and HeNB 100 is some distance away, and P 0_NOMINAL_PUSCH and P 0_UE_PUSCH are preset in advance.
  • control section 105 obtains path loss offset ⁇ PL from PL HeNB-HUE and PL MeNB-HeNB obtained in the peripheral search mode as shown in the following equation (ST306).
  • control section 105 obtains uplink power offset P offset ( ⁇ PL) using ⁇ PL and the function shown in FIG. 4 (ST307).
  • the HUE performs uplink transmission power control using P 0_UE_PUSCH included in the received SIB.
  • the HUE performs transmission power control using P 0_UE_PUSCH according to the description in Non-Patent Document 1 above.
  • HeNB measures the path loss between MeNB and HeNB in the peripheral search mode state, and the measurement result Based on this, the transmission power control of the uplink of the HUE is performed in the main mode state. Therefore, according to the present embodiment, it is possible to perform appropriate transmission power control that suppresses interference between MeNB and HeNB while reducing the power consumption by reducing the processing load of HUE.
  • the path loss between MeNB and HeNB is measured instead of the path loss between MeNB and HUE.
  • the path loss between the MeNB and the HeNB is measured in the peripheral search mode immediately after the HeNB is powered on. This is to reduce the number of times the path loss is measured between the MeNB and the HeNB and reduce the load on the HeNB.
  • the HeNB once the HeNB is installed, it is rarely moved, and since the MeNB is substantially fixed as described above, the positional relationship between the MeNB and the HeNB is rarely changed. In particular, when moving the HeNB, it is considered that it is normal to turn off the power, and therefore the position of the HeNB rarely changes after the power is turned on.
  • the HeNB may be able to detect the timing at which the measurement of the path loss between the MeNB and the HeNB should be performed again more positively. For example, it may be possible to redo the measurement of the path loss when the HeNB is moved.
  • the movement of the HeNB can be detected by attaching a sensor or the like to the bottom surface of the HeNB so that it can be detected that the HeNB has been lifted. Further, in order to perform more accurate measurement, not only measurement in the peripheral search mode but also path loss may be measured periodically.
  • the method of this embodiment and the method of the prior art may be properly used depending on the size of the path loss.
  • the present invention has been described with respect to LTE as an example, the present invention is not limited to this, and can be applied to all wireless communication standards that allow mixing of MeNB and HeNB.
  • the present invention is suitable for a mobile communication system having MeNB, HeNB, and HUE.

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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 HeNB capable de mesurer facilement un affaiblissement de propagation, de réduire une consommation d'énergie par réduction d'une charge de traitement dans un HUE, et d'empêcher un brouillage entre un MeNB et l'HeNB. Dans l'HeNB, une unité de commande (105) détecte un identifiant de cellule du MeNB, une unité d'extraction de MIB (106) extrait un MIB d'un signal de réception sur la base de l'identifiant de cellule, une unité d'extraction de SIB (107) extrait un SIB du signal de réception par utilisation du MIB, et une unité de mesure de RSRP (108) mesure une puissance de réception d'un signal de liaison descendante par utilisation d'informations de station de base incluses dans le SIB. L'unité de commande (105) calcule un premier affaiblissement de propagation entre le MeNB et l'HeNB (100) par utilisation de la puissance de réception, calcule un décalage de l'affaiblissement de propagation à partir du premier affaiblissement de propagation et d'un second affaiblissement de propagation entre l'HUE et l'HeNB, calcule un décalage de puissance d'une liaison montante par utilisation du décalage de l'affaiblissement de propagation, et calcule une puissance cible en prenant en considération le décalage de puissance. Une unité RF d'émission (111) envoie le SIB comprenant la puissance cible à l'HUE, et l'HUE utilise la puissance cible pour réaliser une commande de puissance d'émission de la liaison montante.
PCT/JP2010/006545 2009-11-09 2010-11-08 Dispositif de microstation de base et procédé de commande de puissance d'émission WO2011055555A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-256346 2009-11-09
JP2009256346A JP2011101313A (ja) 2009-11-09 2009-11-09 小型基地局装置および送信電力制御方法

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WO2011055555A1 true WO2011055555A1 (fr) 2011-05-12

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JP (1) JP2011101313A (fr)
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013108317A1 (fr) * 2012-01-17 2013-07-25 日本電気株式会社 Système de communication sans fil, dispositif de commande de puissance d'émission, dispositif de station de base, dispositif de fourniture de paramètre et procédé de commande de puissance d'émission method
WO2013166695A1 (fr) * 2012-05-11 2013-11-14 富士通株式会社 Procédé et dispositif pour commander la puissance d'émission d'un signal de référence de sondage en liaison montante
JP2014526202A (ja) * 2011-08-02 2014-10-02 アルカテル−ルーセント セルｉｄ共有されているヘテロジニアス・ネットワークにおけるアップリンク電力制御に用いられる方法
WO2015169346A1 (fr) * 2014-05-06 2015-11-12 Telefonaktiebolaget L M Ericsson (Publ) Commande de puissance en liaison montante dans des réseaux hétérogènes
CN106060906A (zh) * 2016-05-24 2016-10-26 东南大学 一种两层异构网络中高谱效低功耗的功率控制方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101763897B1 (ko) * 2013-12-31 2017-08-14 주식회사 케이티 역방향 전력을 제어하는 기지국 및 방법
US9585103B2 (en) * 2014-01-30 2017-02-28 Qualcomm Incorporated Techniques for controlling transmission power in shared radio frequency spectrum

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WO2009072355A1 (fr) * 2007-12-03 2009-06-11 Nec Corporation Système de communication sans fil, procédé de commande de communication, station sans fil et support d'enregistrement
WO2009157390A1 (fr) * 2008-06-23 2009-12-30 株式会社エヌ・ティ・ティ・ドコモ Procédé de communication mobile, station mobile et station de base radio

Patent Citations (2)

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WO2009072355A1 (fr) * 2007-12-03 2009-06-11 Nec Corporation Système de communication sans fil, procédé de commande de communication, station sans fil et support d'enregistrement
WO2009157390A1 (fr) * 2008-06-23 2009-12-30 株式会社エヌ・ティ・ティ・ドコモ Procédé de communication mobile, station mobile et station de base radio

Non-Patent Citations (1)

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Title
KYOCERA: "Home UE Uplink Interference Mitigation Scheme Based on Pathloss Difference toward LTE Release 9", 3GPP TSG-RAN WG4 MEETING #52BIS, R4- 093617, 16 October 2009 (2009-10-16), pages 1 - 6 *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014526202A (ja) * 2011-08-02 2014-10-02 アルカテル−ルーセント セルｉｄ共有されているヘテロジニアス・ネットワークにおけるアップリンク電力制御に用いられる方法
US9763198B2 (en) 2011-08-02 2017-09-12 Alcatel Lucent Method used for uplink power control in a heterogeneous network with a shared cell-ID
WO2013108317A1 (fr) * 2012-01-17 2013-07-25 日本電気株式会社 Système de communication sans fil, dispositif de commande de puissance d'émission, dispositif de station de base, dispositif de fourniture de paramètre et procédé de commande de puissance d'émission method
JPWO2013108317A1 (ja) * 2012-01-17 2015-05-11 日本電気株式会社 無線通信システム、送信電力制御装置、基地局装置、パラメータ供給装置、及び送信電力制御方法
WO2013166695A1 (fr) * 2012-05-11 2013-11-14 富士通株式会社 Procédé et dispositif pour commander la puissance d'émission d'un signal de référence de sondage en liaison montante
CN104255073A (zh) * 2012-05-11 2014-12-31 富士通株式会社 上行探测参考信号的发送功率控制方法及其装置
WO2015169346A1 (fr) * 2014-05-06 2015-11-12 Telefonaktiebolaget L M Ericsson (Publ) Commande de puissance en liaison montante dans des réseaux hétérogènes
US10327212B2 (en) 2014-05-06 2019-06-18 Telefonaktiebolaget Lm Ericsson (Publ) Uplink power control in heterogeneous networks
CN106060906A (zh) * 2016-05-24 2016-10-26 东南大学 一种两层异构网络中高谱效低功耗的功率控制方法
CN106060906B (zh) * 2016-05-24 2019-06-25 东南大学 一种两层异构网络中高谱效低功耗的功率控制方法

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