WO2012024922A1 - Procédé de combinaison d'antennes multiples pour une valeur d'avance temporelle sur liaison montante, et station de base correspondante - Google Patents

Procédé de combinaison d'antennes multiples pour une valeur d'avance temporelle sur liaison montante, et station de base correspondante Download PDF

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Publication number
WO2012024922A1
WO2012024922A1 PCT/CN2011/072172 CN2011072172W WO2012024922A1 WO 2012024922 A1 WO2012024922 A1 WO 2012024922A1 CN 2011072172 W CN2011072172 W CN 2011072172W WO 2012024922 A1 WO2012024922 A1 WO 2012024922A1
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WO
WIPO (PCT)
Prior art keywords
value
cinr
values
uplink channel
uplink
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Ceased
Application number
PCT/CN2011/072172
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English (en)
Chinese (zh)
Inventor
吴江
涂乃水
朱常青
赵楠
梁枫
李岩
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ZTE Corp
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ZTE Corp
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Publication of WO2012024922A1 publication Critical patent/WO2012024922A1/fr
Anticipated expiration legal-status Critical
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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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]

Definitions

  • the present invention relates to a measurement technique for time advancement (Ta, T e Advance), and more particularly to an uplink multi-antenna combining method and base station.
  • Ta, T e Advance time advancement
  • Background technique
  • the LTE project is an evolution of third-generation mobile communication technology (3G, 3rd-generation), which improves and enhances 3G air access technology, using Orthogonal Frequency Division Multiplexing (OFDM) and multiple inputs.
  • OFDM Orthogonal Frequency Division Multiplexing
  • MIMO Multiple-Input Multiple-Out-put
  • MIMO Multiple-Input Multiple-Out-put
  • the Uplink Physical Uplink Shared Channel (PUSCH) is used to transmit uplink service data sent by the user equipment (UE, User Equipment) to the base station, where one subframe includes two time slots, and each time slot includes one time slot. Pilot symbols known for the channel estimation and measurement known at the receiving end.
  • the base station performs the Ta measurement by using the uplink pilot symbols of each UE, and reports the measurement result to the media access control (MAC) layer.
  • the MAC layer processes the downlink and sends the downlink to the UE.
  • the Ta value is adjusted by Ta to ensure synchronization with the base station.
  • the uplink synchronization accuracy is 167; (where 7 is the sampling accuracy) and its value is approximately 0.52 ⁇ ⁇ .
  • the technical problem to be solved by the present invention is to provide an uplink multi-antenna combining method and a base station to overcome the defect that the results obtained by combining the estimated Tas of the antennas when the performance of the plurality of receiving antennas are different are unreliable.
  • the present invention provides a multi-antenna combining method for uplink time advancement, which is applied to a base station provided with at least two antennas, the method comprising:
  • the base station respectively measures the time advance Ta value and the carrier-to-interference and noise ratio CINR value of the uplink channel corresponding to each antenna, and then passes each CINR value except the largest CINR value of all CINR values with all CINR values.
  • the largest CINR value in the value is compared with the uplink channel whose channel quality meets the test requirement, and the Ta value of the uplink channel whose selected channel quality meets the test requirement is combined.
  • the step of selecting an uplink channel whose channel quality satisfies the test requirement by comparing each CINR value except the largest CINR value of all CINR values with the largest CINR value of all CINR values includes:
  • the uplink channel whose ratio of the CINR value to the largest CINR value of all the CINR values is less than or equal to the preset threshold value is used as the uplink channel whose channel quality meets the test requirement; or the ratio of the CINR value to the largest CINR value among all the CINR values
  • An uplink channel that is greater than or equal to the reciprocal of the preset threshold is used as an uplink channel whose channel quality meets the test requirements.
  • the step of combining the Ta values of the uplink channels whose channel quality meets the test requirements includes: performing maximum ratio combining on the Ta values of the uplink channels whose channel quality meets the test requirements.
  • the step of performing maximum ratio combining on the Ta value of the uplink channel whose channel quality meets the test requirement includes: the CINR value of the uplink channel that satisfies the test requirement for each channel quality, and the uplink channel of all the channel qualities satisfying the test requirement.
  • the ratio of the sum of the CINR values is used as the weight of the Ta value of the uplink channel, and the weighted addition of the Ta values is performed.
  • the base station measures the Ta value and the CINR value of the uplink channel corresponding to each antenna according to the channel estimation matrix measured by each antenna.
  • the present invention also provides a base station having at least two antennas disposed thereon, including: Block, screening module and Ta value merge module;
  • the measuring module is configured to separately measure a Ta value and a C earning value of an uplink channel corresponding to each antenna on the base station;
  • the screening module is configured to select an uplink channel whose channel quality meets the test requirement by comparing each CINR value except the largest CINR value of all CINR values with the largest CINR value of all CINR values, and select the selected channel.
  • the uplink channel Ta value whose quality meets the test requirement is sent to the Ta value merging module;
  • the uplink channel whose channel quality meets the test requirement is: an uplink channel whose ratio of the CINR value to the largest CINR value of all CINR values is less than or equal to a preset threshold;
  • the Ta value combining module is arranged to merge all received Ta values.
  • the screening module is configured to use an uplink channel whose ratio of the CINR value to the maximum CINR value of all CINR values is less than or equal to a preset threshold as an uplink channel whose channel quality meets the test requirement; or, by using a CINR value.
  • the uplink channel with the ratio of the largest CINR value of all CINR values being greater than or equal to the reciprocal of the preset threshold value is used as the uplink channel whose channel quality meets the test requirement.
  • the Ta value combining module is configured to perform maximum ratio combining on all received Ta values.
  • the Ta value merging module is configured to use, as the Ta value of the uplink channel, a ratio of a CINR value of an uplink channel whose channel quality meets the test requirement to a total of CINR values of uplink channels whose channel qualities meet the test requirements. Weight, the weighted addition of the Ta value.
  • the measuring module is configured to measure the Ta value and the CINR value of the uplink channel corresponding to each antenna according to the channel estimation matrix measured by each antenna.
  • FIG. 1 is a flowchart of a multi-antenna combining method of Ta values according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a base station according to an embodiment of the present invention. Preferred embodiment of the invention
  • the basic idea of the method of the present invention is: the base station separately measures the Ta value and the carrier to interference plus noise ratio (CINR) of the uplink channel corresponding to each antenna, and then satisfies the channel quality.
  • the Ta values of the upstream channels required for the test are combined.
  • the uplink channel whose channel quality meets the test requirement is: the ratio of the maximum CINR value of all the CINR values to the CINR value of the uplink channel is less than or equal to the preset threshold.
  • the foregoing combining manner may adopt maximum ratio combining, that is, the ratio of the CINR value of the uplink channel whose channel quality satisfies the test requirement to the sum of the CIN values of all the uplink channels whose channel quality meets the test requirement is used as the Ta of the uplink channel.
  • the weight of the value is weighted and added to the Ta value.
  • the uplink channel that satisfies the test requirement by the channel shield is: an uplink channel whose ratio of the CINR value to the largest CINR value among all the CINR values is greater than or equal to the reciprocal of the preset threshold.
  • the multi-antenna combining method of the Ta value of the present invention includes the following steps: Step 1: The base station performs Ta measurement and CINR measurement according to the channel estimation matrix H measured by each antenna on the antenna;
  • the uplink Ta measurement can adopt the time domain or frequency ⁇ method, and since the measurement can be performed by using the prior art, it will not be described here.
  • Step 2 Set a preset threshold of Ta according to the simulation and actual experience, and the base station selects the largest CINR value from all the CIN values measured above;
  • Step 3 Calculate the ratio of the maximum CINR value to the CINR value of all other uplink channels, and determine whether there is a ratio greater than the preset threshold. If yes, discard the Ta value of the uplink channel.
  • Step 4 Perform maximum ratio combining on the Ta values of the uplink channel of the remaining Ta value and the maximum CINR value to obtain an uplink Ta measurement value.
  • the multi-antenna combining method of the Ta value of the present invention includes the following steps:
  • Step 1 Perform CIN measurement and Ta measurement on the signals received by antenna 0 and antenna 1, respectively, and obtain the CINR result and the Ta result of the uplink channel corresponding to antenna 0 are CINR0 and TaO, respectively, and the CINR result of the uplink channel corresponding to antenna 1 and The Ta results are CINR1 and Tal, respectively;
  • Step 2 Determine whether the CINR ratios CI R1/CIK 0 and CIN 0/CINR1 calculated on the two antennas are greater than the preset threshold value 3, and if there is a threshold greater than the preset threshold, the quality of the two signals is far apart. , directly discarding Ta of one signal with poor signal quality, and using the Ta value of one signal with good signal quality as the final Ta measurement result;
  • Step 3 If the CINR ratio of the two signals does not exceed the threshold, the Ta value of the two signals is subjected to maximum ratio combining (MRC, Maximum Ratio Combination), that is:
  • the multi-antenna combining method of the Ta value of the present invention includes the following steps:
  • Step 1 Perform CINR measurement and Ta measurement on the received signals on antenna 0, antenna 1, antenna 2, and antenna 3, respectively, and obtain CINR measurement results and Ta measurement results on antenna 0 as CIN 0 and TaO, respectively.
  • the CINR measurement result and the Ta measurement result are CINR1 and Tal, respectively
  • the CINR measurement result and the Ta measurement result on the antenna 2 are CINR2 and Ta2, respectively
  • the CINR measurement result and the Ta measurement result on the antenna 3 are CINR3 and Ta3, respectively;
  • Step 2 Find the maximum value of the CINR value on the above four antennas CINR_Max;
  • Step 3 Determine whether the calculated CINR ratio CINR_Max/CINRx on the CINR-Max and other antennas is greater than the preset threshold 2. If there is a threshold greater than the preset threshold, the signal with the best signal quality is much better than the other signal. , directly discarding Ta of one signal with poor signal quality;
  • Step 4 Perform MRC merge on the remaining Ta value and the maximum CINR value of the Ta value.
  • the base station of the present invention includes: a measurement module, a screening module, and a Ta value combining module, wherein the base station is provided with at least two antennas;
  • the measurement module is configured to separately measure a Ta value and a CINR value of an uplink channel corresponding to each antenna.
  • the measuring module can measure the Ta value and the CINR value of each corresponding uplink channel according to the channel estimation matrix measured by each antenna.
  • the screening module is configured to send the Ta value of the uplink channel whose selected channel quality meets the test requirement to the Ta value combining module.
  • the uplink channel whose channel quality meets the test requirement is an uplink channel whose ratio of the CINR to the CINR with the largest median value of all the CINRs is less than or equal to the preset threshold.
  • the uplink channel whose channel quality meets the test requirement may also be an uplink channel whose ratio of the CINR to the CINR of all the median CINR is greater than or equal to the reciprocal of the preset threshold.
  • the Ta value combining module is arranged to merge all received Ta values.
  • the Ta value merging module may be configured to perform maximum ratio combining on all received Ta values: that is, the Ta value merging module is configured to set the CINR value of the uplink channel whose channel quality meets the test requirement to all channel qualities.
  • the ratio of the sum of the CINR values of the uplink channels satisfying the test requirement is used as the weight of the Ta value of the uplink channel, and the weighted addition of the Ta values is performed.
  • the abandonment performance according to a preset threshold is poor or even
  • the estimated Ta value on the faulty or broken antenna improves the reliability of the Ta combined value.
  • the accuracy of the estimated value of Ta estimation is improved, and it has good industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de combinaison d'antennes multiples pour une valeur d'avance temporelle sur liaison montante, qui est appliqué à une station de base possédant au moins deux antennes. Le procédé comprend les étapes suivantes : la station de base mesure la valeur de l'avance temporelle Ta et la valeur de rapport entre la porteuse et les interférences plus le bruit (CINR) sur le canal montant correspondant à chaque antenne sur la station de base, puis sélectionne le canal montant dont la qualité de canal répond aux exigences de l'essai par comparaison de chaque valeur de rapport CINR, hormis la valeur de rapport CINR la plus élevée parmi toutes les valeurs de rapport CINR, avec la valeur de rapport CINR maximale parmi toutes les valeurs de rapport CINR et combine la valeur Ta des canaux montants sélectionnés dont la qualité de canal répond aux exigences de l'essai. L'invention concerne en outre une station de base qui peut mettre en œuvre le procédé.
PCT/CN2011/072172 2010-08-27 2011-03-25 Procédé de combinaison d'antennes multiples pour une valeur d'avance temporelle sur liaison montante, et station de base correspondante Ceased WO2012024922A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010267628.XA CN102386957B (zh) 2010-08-27 2010-08-27 一种上行时间提前量的多天线合并方法及基站
CN201010267628.X 2010-08-27

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WO2012024922A1 true WO2012024922A1 (fr) 2012-03-01

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CN103582108B (zh) * 2012-07-23 2017-04-19 京信通信系统（中国）有限公司 一种时间同步方法、装置及系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101317336A (zh) * 2005-11-29 2008-12-03 松下电器产业株式会社 通信装置以及通信方法
CN101388722A (zh) * 2008-11-03 2009-03-18 广州市新邮通信设备有限公司 一种上行同步控制方法、基站和用户设备
WO2009101011A1 (fr) * 2008-02-11 2009-08-20 Nokia Corporation Estimation du délai d’une boucle d’avance de synchronisation

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100518011C (zh) * 2005-09-20 2009-07-22 中兴通讯股份有限公司 双天线系统中基带接收机的自适应分集合并方法
KR101106692B1 (ko) * 2007-10-10 2012-01-18 삼성전자주식회사 다중입출력 통신시스템의 동작 모드 선택 장치 및 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101317336A (zh) * 2005-11-29 2008-12-03 松下电器产业株式会社 通信装置以及通信方法
WO2009101011A1 (fr) * 2008-02-11 2009-08-20 Nokia Corporation Estimation du délai d’une boucle d’avance de synchronisation
CN101388722A (zh) * 2008-11-03 2009-03-18 广州市新邮通信设备有限公司 一种上行同步控制方法、基站和用户设备

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CN102386957A (zh) 2012-03-21

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