WO2015078001A1 - Procédé de détermination de vecteur de précodage, procédé de traitement de précodage et station de base - Google Patents

Procédé de détermination de vecteur de précodage, procédé de traitement de précodage et station de base Download PDF

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Publication number
WO2015078001A1
WO2015078001A1 PCT/CN2013/088211 CN2013088211W WO2015078001A1 WO 2015078001 A1 WO2015078001 A1 WO 2015078001A1 CN 2013088211 W CN2013088211 W CN 2013088211W WO 2015078001 A1 WO2015078001 A1 WO 2015078001A1
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WO
WIPO (PCT)
Prior art keywords
antenna
precoding vector
precoding
base station
failed
Prior art date
Application number
PCT/CN2013/088211
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English (en)
Chinese (zh)
Inventor
王磊
吴晔
乔德礼
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/088211 priority Critical patent/WO2015078001A1/fr
Priority to CN201380077924.5A priority patent/CN105359428B/zh
Publication of WO2015078001A1 publication Critical patent/WO2015078001A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Definitions

  • the embodiments of the present invention relate to communication technologies, and in particular, to a method for determining a precoding vector, a precoding processing method, and a base station. Background technique
  • LSM Large Scale Multiple-Input Multiple-Output
  • MIMO Multiple-Input Multiple-Output
  • the beam width of the transmitted signal can be narrowed by selecting an appropriate precoding matrix, the signal interference between multiple users is reduced, and the number of reusable users is increased.
  • narrow beams adversely affect synchronization channels, broadcast channels, and high-speed mobile users. Therefore, in scenarios such as synchronization channels, broadcast channels, and high-speed mobile users, wide beams can be formed by precoding vectors to enhance coverage.
  • the precoding vector corresponding to the wide beam is related to the specific antenna configuration, if one or more antenna channels are faulty, the wide beam will be greatly affected, and the beam shape of the synchronization signal or the like is abruptly changed from a wide beam to an irregular shape. Not only will the coverage area of the cell appear, but it will even cause great interference to neighboring cells. Summary of the invention
  • Embodiments of the present invention provide a method for determining a precoding vector, a precoding processing method, and a base station to maintain a wide beam signal when an antenna fails.
  • an embodiment of the present invention provides a base station, where the base station includes:
  • An antenna fault detecting module is configured to monitor whether the working state of each of the transmitting antennas is normal, and send an antenna fault to the determining device of the precoding vector when detecting that the transmitting antenna is faulty Notifying that the antenna failure notification includes a sequence number of the failed transmit antenna; the determining device of the precoding vector is configured to: if receiving the antenna fault notification sent by the antenna fault detection module, according to the The sequence number of the failed transmit antenna is updated to a precoding processing module for precoding the transmitted signal according to the updated precoding vector such that the beam shape of the transmitted signal is a wide beam.
  • the precoding vector is obtained according to the following formula:
  • W (r. e j , r ie j .., r m e ji ..., r M — ie j3 ⁇ 4 « ), where w is the precoding vector, M is the number of transmitting antennas, r m is The amplitude of the precoding vector, ⁇ is the phase of the precoding vector
  • ri T is the r m value of the ith iteration
  • ⁇ ) is the value of the ith iteration
  • ⁇ and ⁇ are randomly generated, respectively, and 0 ⁇ ⁇ ⁇ 1
  • h is the control factor of the iteration speed
  • d/ is the antenna spacing and The wavelength ratio is the jitter factor
  • E is the set of sequence numbers of the failed transmitting antenna.
  • the transmitting signal is a synchronization signal or a broadcast signal.
  • an embodiment of the present invention provides a method for determining a precoding vector, where the method for determining a precoding vector includes:
  • the precoding direction w (r 0 e j3 ⁇ 4 , r ie j ⁇ ,...,r m e j3 ⁇ 4 ,...,v M _ ⁇ ) , where w is the precoding vector, M is the number of transmitting antennas, r m is the amplitude of the precoding vector, ⁇ is the phase of the precoding vector,
  • ri is the r m value of the ith iteration, is the value of the i-th iteration, r r and respectively are randomly generated, and o ⁇ ri r ⁇ i ; h is the control factor of the iteration speed,
  • a and % are the upper and lower limits of the coverage of the base station, respectively,
  • an embodiment of the present invention provides a precoding processing method, where the precoding processing method includes:
  • the sequence number of the failed transmitting antenna is obtained according to the antenna failure notification; wherein the antenna failure notification includes a sequence number of the failed transmitting antenna; and according to the failed transmitting antenna Serial number, using the determining method of the precoding vector according to claim 4 to update the precoding vector;
  • the transmitted signal is precoded according to the updated precoding vector such that the beam shape of the transmitted signal is a wide beam.
  • the precoding vector is obtained according to the following formula:
  • w (r 0 e j3 ⁇ 4 , r ie j ⁇ ,...,r m e j ⁇ ,...,v M _ ⁇ ) , where w is the precoding vector, M is the number of transmitting antennas, r m is the amplitude of the precoding vector, ⁇ is the phase of the precoding vector, ⁇ and ⁇ are calculated, and the iteration formulas are as follows:
  • ri T is the r m value of the ith iteration
  • ⁇ is the value of the ith iteration
  • ⁇ and respectively are randomly generated
  • h is the control factor of the iteration speed
  • d/ is the antenna spacing to wavelength ratio, which is the jitter factor
  • E is the set of sequence numbers of the faulty antenna.
  • the transmitting signal is a synchronization signal or a broadcast signal.
  • FIG. 1 is a schematic structural diagram of a base station according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for determining a precoding vector according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a precoding processing method according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a beam of a broadcast signal when a transmitting antenna fails in the prior art
  • FIG. 5 is a beam schematic diagram of a broadcast signal according to a precoding processing method provided by an embodiment of the present invention
  • the base station 1 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station 1 provided by the embodiment of the present invention includes: a plurality of transmitting antennas 11, an antenna fault detecting module 12, a precoding direction determining device 13 and a precoding processing module 14, wherein:
  • the antenna fault detecting module 12 is configured to monitor whether the working state of each of the transmitting antennas is normal, and, when detecting that the transmitting antenna fails, send the determining device 13 to the precoding vector.
  • An antenna failure notification includes a sequence number of the failed transmission antenna;
  • the precoding vector determining device 13 is configured to receive the antenna failure notification sent by the antenna failure detection module 12, And updating the precoding vector according to the sequence number of the failed transmitting antenna;
  • the precoding processing module 14 is configured to perform precoding processing on the transmit signal according to the updated precoding vector, so that the beam shape of the transmit signal is a wide beam.
  • the base station 1 provided by the embodiment of the present invention may adopt a LSM technology, and multiple transmit antennas 11 are deployed; the base station 1 performs precoding processing on the transmit signal by using a precoding vector corresponding to the wide beam, so that the transmit signal is The beam shape is a wide beam, and upon detecting a failure of one or more of the plurality of transmit antennas 11, recalculating the precoding vector according to the initial parameters and the sequence number of the failed transmit antenna, according to the update
  • the pre-coding vector performs a pre-coding process on the transmit signal, so that the beam shape of the transmit signal is maintained as a wide beam.
  • the transmit signal may be, for example, a synchronization signal or a broadcast signal.
  • the initial parameters may include: ⁇ 1, base station coverage A ⁇ %, antenna spacing and wavelength ratio.
  • the base station provided by the embodiment of the present invention updates the precoding vector according to the sequence number of the failed transmitting antenna when detecting one or more of the transmitting antennas, and performs the transmitting signal according to the updated precoding vector.
  • the precoding process is such that the beam shape of the transmitted signal is a wide beam, so that the wide beam signal can be maintained when the transmitting antenna fails, and the influence of the antenna failure on the wide beam signal is eliminated.
  • the amplitude of the code vector, e m is the phase of the precoding vector, and ⁇ and ⁇ are calculated in an iterative manner.
  • the iterative formula is as follows:
  • FIG. 2 is a flowchart of a method for determining a precoding vector according to an embodiment of the present invention. As shown in FIG. 2, a method for determining a precoding vector according to an embodiment of the present invention includes:
  • the initial parameters may include the number of antennas, the antenna spacing and wavelength ratio, and the coverage of the base station.
  • FIG. 3 is a flowchart of a precoding processing method according to an embodiment of the present invention. As shown in FIG. 3, the precoding processing method provided by the embodiment of the present invention includes:
  • the executor of the precoding processing method provided by the embodiment of the present invention may be a base station provided by any embodiment of the present invention;
  • the transmitting signal may be, for example, a broadcast signal or a synchronization signal.
  • the broadcast signal when each transmitting antenna of the base station adopting the LSM technology is in a normal working state, the broadcast signal is pre-coded by the base station by using the precoding vector to form a wide beam signal, which can enhance signal coverage.
  • the base station updates the precoding vector in real time according to the sequence number of the failed antenna, so that the beam shape of the broadcast signal is restored to a wide beam, which ensures signal coverage and is realized at the transmitting antenna.
  • the wide beam signal can still be maintained in the event of a fault, eliminating the effects of antenna faults on the wide beam signal.
  • the antenna spacing is half of the wavelength, and the upper and lower limits of the coverage of the base station and the % coverage are respectively - ⁇ ⁇ ; when the transmitting antennas are all in a fault-free state, the base
  • the station generates a wide beam broadcast signal through a precoding vector corresponding to the wide beam to enhance signal coverage.
  • FIG. 4 is a schematic diagram of a beam of a broadcast signal when a transmitting antenna fails in the prior art. As shown in FIG. 4, the beam shape of the broadcast signal is abruptly changed from a wide beam to an irregular shape due to the failure of the antenna No. 4, thereby causing a coverage hole in the service range of the base station, and also causing a large impact on the adjacent cell. interference.
  • the precoding vector wr 0 e j , r er 15 e j3 ⁇ 4 is recalculated according to the initial parameter and the sequence number 4 of the failed antenna.
  • r m is the amplitude of the precoding vector w
  • e m is the phase of the precoding to w
  • the iterative formula for calculating ⁇ is as follows:
  • the initial phase values are: -0.4916, 2.6121, 1.8360, 2.8871, 0.9785,
  • the amplitude and phase of the updated precoding vector w calculated according to the formula are as follows:
  • the amplitude of w (r 0 ⁇ r 15 ) is: 0.110, 0.216, 0.070, 0.462, 0.000, 1.000, 0.662, 1.000, 1.000, 1.000, 0.945, 0.106, 0.289, 0.131, 0.197.
  • FIG. 5 is a schematic diagram of a beam of a broadcast signal using a precoding processing method according to an embodiment of the present invention.
  • the base station uses the precoding processing method provided by the embodiment of the present invention to update the precoding vector required by the base station to perform precoding processing on the broadcast signal according to the sequence number of the faulty antenna when the transmitting antenna fails.
  • the base station uses the precoding processing method provided by the embodiment of the present invention to update the precoding vector required by the base station to perform precoding processing on the broadcast signal according to the sequence number of the faulty antenna when the transmitting antenna fails.
  • signal coverage is ensured, and the wide beam signal can be maintained when the transmitting antenna fails, and the influence of the antenna failure on the wide beam signal is eliminated.

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

Abstract

L'invention concerne un procédé de détermination de vecteur de précodage, un procédé de traitement de précodage et une station de base. . La station de base comprend une pluralité d'antennes d'émission ; un module de détection de défaillance d'antenne utilisé pour envoyer une notification de défaillance d'antenne à un dispositif de détermination de vecteur de précodage après avoir observé la défaillance d'une antenne d'émission, la notification de défaillance d'antenne comprenant le numéro de série de l'antenne d'émission qui est défaillante ; le dispositif de détermination de vecteur de précodage est utilisé pour mettre à jour un vecteur de précodage conformément au numéro de série de l'antenne d'émission défaillante lors de la réception de la notification de la défaillance de l'antenne ; et un module de traitement de précodage est utilisé pour effectuer un traitement de précodage sur un signal d'émission conformément au vecteur de précodage mis à jour de sorte qu'un signal d'émission puisse avoir une forme de faisceau large. Au moyen du procédé de détermination de vecteur de précodage, du procédé de traitement de précodage et de la station de base utilisés dans les modes de réalisation de la présente invention, un signal à faisceau large peut toujours être maintenu lorsqu'une antenne d'émission est défaillante, ce qui empêche la défaillance de l'antenne d'avoir une influence sur le signal à faisceau large.
PCT/CN2013/088211 2013-11-29 2013-11-29 Procédé de détermination de vecteur de précodage, procédé de traitement de précodage et station de base WO2015078001A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2013/088211 WO2015078001A1 (fr) 2013-11-29 2013-11-29 Procédé de détermination de vecteur de précodage, procédé de traitement de précodage et station de base
CN201380077924.5A CN105359428B (zh) 2013-11-29 2013-11-29 预编码向量的确定方法、预编码处理方法及基站

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PCT/CN2013/088211 WO2015078001A1 (fr) 2013-11-29 2013-11-29 Procédé de détermination de vecteur de précodage, procédé de traitement de précodage et station de base

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Publication number Priority date Publication date Assignee Title
KR20190129919A (ko) * 2017-03-23 2019-11-20 가부시키가이샤 엔티티 도코모 유저단말 및 무선 통신 방법
US10779350B2 (en) * 2017-08-10 2020-09-15 Futurewei Technologies, Inc. Beam failure recovery request
CN116017698A (zh) * 2019-04-10 2023-04-25 北京小米移动软件有限公司 波束失败确定方法和装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102025404A (zh) * 2009-09-15 2011-04-20 中兴通讯股份有限公司 一种码本生成方法及装置
US20110103504A1 (en) * 2009-10-30 2011-05-05 Futurewei Technologies, Inc. System and Method for User Specific Antenna Down Tilt in Wireless Cellular Networks
CN102752035A (zh) * 2011-04-22 2012-10-24 普天信息技术研究院有限公司 一种lte系统中控制信道的发射方法
WO2013024853A1 (fr) * 2011-08-15 2013-02-21 株式会社エヌ・ティ・ティ・ドコモ Système de communication sans fil, dispositif station de base sans fil, terminal utilisateur et procédé de communication sans fil
CN103039019A (zh) * 2010-08-16 2013-04-10 瑞典爱立信有限公司 用于确定预编码权重的方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102025404A (zh) * 2009-09-15 2011-04-20 中兴通讯股份有限公司 一种码本生成方法及装置
US20110103504A1 (en) * 2009-10-30 2011-05-05 Futurewei Technologies, Inc. System and Method for User Specific Antenna Down Tilt in Wireless Cellular Networks
CN103039019A (zh) * 2010-08-16 2013-04-10 瑞典爱立信有限公司 用于确定预编码权重的方法
CN102752035A (zh) * 2011-04-22 2012-10-24 普天信息技术研究院有限公司 一种lte系统中控制信道的发射方法
WO2013024853A1 (fr) * 2011-08-15 2013-02-21 株式会社エヌ・ティ・ティ・ドコモ Système de communication sans fil, dispositif station de base sans fil, terminal utilisateur et procédé de communication sans fil

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CN105359428A (zh) 2016-02-24

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