WO2014190452A1 - 大规模天线系统中的csi反馈方法和装置 - Google Patents
大规模天线系统中的csi反馈方法和装置 Download PDFInfo
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- WO2014190452A1 WO2014190452A1 PCT/CN2013/000633 CN2013000633W WO2014190452A1 WO 2014190452 A1 WO2014190452 A1 WO 2014190452A1 CN 2013000633 W CN2013000633 W CN 2013000633W WO 2014190452 A1 WO2014190452 A1 WO 2014190452A1
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- Prior art keywords
- indication information
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- propagation paths
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Classifications
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- 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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
-
- 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
- H04B7/0417—Feedback systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
Definitions
- the present invention relates generally to mobile communication technologies and, more particularly, to a Multiple User Multiple Input Multiple Output (MU MIMO) transmission technique.
- MU MIMO Multiple User Multiple Input Multiple Output
- CSI channel state information
- UE user equipment
- CSI feedback overhead As the number of base station antennas increases, the feedback overhead also increases, making CSI feedback overhead more difficult to meet the needs of practical applications.
- a base station device In a large-scale antenna system, a base station device may be equipped with and use 100 or more antennas. In this case, traditional short-term CSI feedback is unacceptable for practical applications.
- the benefits of large-scale antenna systems in reducing total transmit power are highly dependent on accurate channel state information, which also makes CSI feedback very important in large-scale antenna systems. Summary of the invention
- Recent multi-antenna measurements and surveys have shown that the wireless channel of a large-scale antenna system is sparse in many cases, and its channel capacity is dominated by only a few degrees of freedom (far less than the number of antennas).
- a method in a user equipment for a large-scale antenna system comprising: detecting a downlink channel; determining a channel response of a first number of strong propagation paths according to a multipath propagation model, wherein each propagation path The channel response is determined as a matrix form associated with the following time varying parameters: arrival direction, arrival time, path amplitude; feedback of the first quantity, and indication information of the time varying parameter of the first number of strong propagation paths .
- the feedback of the indication information of the arrival direction and the arrival time is performed in a first averaging period
- the feedback of the indication information of the path amplitude is performed in a second averaging period, the first averaging period Longer than the second average period.
- the downlink channel includes a sub-band
- the indication information of the time-varying parameter of the first number of strong propagation paths includes: indication information of an arrival direction, the sub-band An indication of the joint mean of the inner arrival time and the path magnitude.
- the feedback of the indication information of the direction of arrival is performed in a first averaging period
- the feedback of the indication information of the joint mean of the arrival time and the path amplitude in the sub-band is performed in a second averaging period
- the first average period is longer than the second average period.
- a method in a base station apparatus for a large-scale antenna system comprising: receiving an indication of a first number of feedbacks by a user equipment, and a time varying parameter of the first number of strong propagation paths
- the time-varying parameter includes: an arrival direction, an arrival time, and a path amplitude; and determining a downlink channel response according to the received indication information of the time-varying parameter of the first number of strong propagation paths.
- the downlink channel includes a sub-band
- the indication information of the time-varying parameter of the first number of strong propagation paths includes: indication information of an arrival direction, the sub-band An indication of the joint mean of the inner arrival time and the path magnitude.
- an apparatus in a user equipment for a large-scale antenna system comprising: a detecting module configured to detect a downlink channel; and a calculating module configured to determine the first quantity according to the multipath propagation model Channel response of a strong propagation path, wherein the channel response of each propagation path is determined as a matrix form associated with the following time varying parameters: arrival direction, arrival time, path amplitude; a feedback module configured to feed back the first quantity, and the The indication information of the time varying parameter of the first number of strong propagation paths.
- the feedback module is configured to feed back indication information of the arrival direction and the arrival time in a first average period, and feedback information of the path amplitude in a second average period, where the first The average period is longer than the second average period.
- the downlink channel includes a sub-band
- the indication information of the time-varying parameter of the first number of strong propagation paths includes: indication information of an arrival direction, the sub-band An indication of the joint mean of the inner arrival time and the path magnitude.
- the feedback module is configured to feed back indication information of the arrival direction with a first average period, and feed back an indication of a joint mean of arrival time and path amplitude in the sub-band with a second average period.
- Information, the first average period is longer than the second average period.
- a user equipment includes the above described apparatus.
- an apparatus for a base station device for a large-scale antenna system comprising: a receiving module, configured to receive a first quantity fed back by a user equipment, and a first number of strong propagation paths
- the indication information of the time-varying parameter, the time-varying parameter includes: an arrival direction, an arrival time, and a path amplitude; and a calculation module configured to determine, according to the received indication information of the time-varying parameter of the first number of strong propagation paths, Downstream channel response.
- the downlink channel includes a sub-band, wherein the first quantity
- the indication information of the time varying parameter of the strong propagation path includes: indication information of the arrival direction, indication information of a joint mean of the arrival time and the path amplitude in the sub-band.
- a base station apparatus includes the above apparatus.
- FIG. 1 shows a flow chart of a method in a user equipment for a large-scale antenna system in accordance with one embodiment of the present invention
- FIG. 2 shows a flow chart of a method in a base station device for a large-scale antenna system in accordance with one embodiment of the present invention
- Figure 3 is a block diagram showing the arrangement of devices in a user equipment for a large-scale antenna system in accordance with one embodiment of the present invention
- Fig. 4 is a block diagram showing the arrangement of devices in a base station apparatus for a large-scale antenna system according to an embodiment of the present invention. detailed description
- the base station or base station device referred to herein is, for example but not limited to, the LTE system.
- the Node B or the evolved Node B (eNB) in the LTE-A system and the technical solution of the present invention is not limited to the applicable LTE system or the LTE-A system.
- a base station is configured with a linear antenna array of N transmit antennas, and an Orthogonal Frequency Division Multiplexing (OFDM) system with a number of sub-carriers of N FFT is used.
- OFDM Orthogonal Frequency Division Multiplexing
- the wireless multipath channel consists of K propagation paths, and the arrival time of each propagation path
- H is an NxN FFT dimensional matrix
- the (n, j)th element represents the fading coefficient of the nth transmit antenna on the jth subcarrier (subcarrier)
- h ⁇ [h(l, j) A h(N, j)] T is the jth column of H.
- a(0 k ) [1, & ⁇ ( ⁇ 2 ⁇ ,), ⁇ , exp(i(N - ⁇ )2 ⁇ ,)] ⁇ (2), and
- FIG. 1 shows a flow diagram of a method 10 in a user equipment for a large-scale antenna system in accordance with an embodiment of the present invention
- FIG. 2 illustrates a method for a large-scale antenna system in accordance with one embodiment of the present invention.
- Flowchart of method 20 in a base station device As shown, method 10 includes steps 11, 12, and 13, and method 20 includes steps 21, and 22.
- step 11 the user equipment detects the downlink channel.
- step 12 the user equipment determines a channel response of the first number of strong propagation paths from the detected downlink channel (matrix) according to the multipath propagation model, where the channel response of each propagation path is determined to be related to the following time varying parameter.
- Matrix form arrival direction, arrival time, path amplitude.
- the channel response of each propagation path is, for example but not limited to, the expression on the right side of the equation (1).
- the first number of strong propagation paths are usually selected in the following ways.
- the "first quantity" is not determined in advance. First, determine the propagation path with the highest amplitude, that is, the propagation path with the largest modulus value of the corresponding p k . It is determined that the ratio of the amplitude to the amplitude of the highest propagation path is not lower than (or higher than) a predetermined value, such as but not limited to any value between 0.1 and 0.2. These magnitudes and the highest spread The propagation path of the path amplitude not lower than the predetermined value (including the highest amplitude propagation path) is the first number of strong propagation paths. In extreme cases, the "first quantity" may be 1, that is, only the strongest propagation path of the highest amplitude propagation path.
- the "first quantity” is predetermined.
- the “first number” of propagation paths with the largest amplitude is the strong propagation path. This method can control the amount of calculation and the amount of feedback information in advance.
- step 13 the user equipment feeds back the indication information of the first quantity and the time varying parameter of the first quantity of strong propagation paths.
- the "first quantity" (the number of strong propagation paths) is expressed as K d , and all propagation paths are arranged in descending order of magnitude, ie IA
- User equipment The indication information of the time-varying parameter of the K d strong propagation paths is fed back. Since the number of strong propagation paths K d is less than the total number of multipath channel propagation paths K, feedback overhead is reduced.
- Such different periodic feedback modes are adapted to the time-varying characteristics of the channel parameters, further saving feedback overhead.
- the base station device receives the first quantity that is fed back by the user equipment, and the indication information of the time-varying parameter of the first number of strong propagation paths, where the time-varying parameter includes: an arrival direction, an arrival time, and a path amplitude.
- the base station device determines the downlink channel response according to the received indication information of the time-varying parameter of the first number of strong propagation paths.
- the reconstruction of the downlink channel can be represented by, for example, but not limited to, the following equation (4)
- H ⁇ a( ⁇ )Af H ( ⁇ ) (4).
- the user equipment is only assigned a few or even one sub-band.
- the channel response on one sub-band can be considered flat, and only the channel coefficients assigned to the user equipment need to be reported back, without reporting the channel coefficients over the entire bandwidth.
- Channel vector of the j-th subcarrier It can be expressed as (6).
- the complete bandwidth is divided into multiple sub-bands, and the channel response within each sub-band can be considered flat.
- the average channel vector of the Sth sub-band is expressed as fi s , and fi s can be calculated by the following formula
- J S represents the number of subcarriers within a subband
- J(S) represents a set of subcarriers within the S subband
- b S ⁇ represents the joint mean of the arrival time and path amplitude within the subband. If the user equipment is only allocated the Sth sub-band, the user equipment only feeds back the report fi s to the base station equipment without reporting the complete channel matrix H.
- the first number of strong propagation paths are determined as the modulus of the joint mean ks or the K d propagation paths with the highest norm. Without loss of generality, all propagation paths are arranged in descending order of the combined mean of the arrival time and the path amplitude, ie I 3 ⁇ 4, s 1>1 b s ⁇ > ⁇ > lb Ks I.
- the user equipment may feed back the indication information of the time-varying parameter of the K d strong propagation paths. Since the number of strong propagation paths K d is less than the total number of multipath channel propagation paths K, feedback overhead is reduced.
- Such different periodic feedback modes are adapted to the time-varying characteristics of the channel parameters, further saving feedback overhead.
- Figure 3 shows a block diagram of an apparatus 30 in a user equipment for a large scale antenna system of one embodiment.
- Fig. 4 shows a block diagram of an apparatus 40 in a base station apparatus for a large-scale antenna system of an embodiment.
- Device 30 is usually configured in the user equipment. As shown in FIG. 3, the device 30 includes a detection module 31, a calculation module 32, and a feedback module 33.
- the device 40 is typically configured in a base station device. As shown in FIG. 4, the device 40 includes a receiving module 41 and a computing module 42.
- the detection module 31 is configured to detect a downlink channel.
- the calculation module 32 is configured to determine a channel response of the first number of strong propagation paths from the detected downlink channel (matrix) according to the multipath propagation model, wherein the channel response of each propagation path is determined to be a matrix form related to the following time varying parameters: Direction of arrival, arrival time, path range.
- the channel response of each propagation path is, for example but not limited to, the expression on the right side of the equation (1).
- the feedback module 33 is configured to feed back the first number, and the indication information of the time varying parameter of the first number of strong propagation paths.
- the "first quantity" (the number of strong propagation paths) is expressed as K d , and all propagation paths are arranged in descending order of magnitude, ie IA
- User equipment The indication information of the time-varying parameter of the K d strong propagation paths is fed back. Since the number of strong propagation paths K d is less than the total number of multipath channel propagation paths K, feedback overhead is reduced.
- Such different periodic feedback modes are adapted to the time-varying characteristics of the channel parameters, further saving feedback overhead.
- the receiving module 41 is configured to receive indication information of a first quantity and a time varying parameter of the first quantity of strong propagation paths fed back by the user equipment, where the time varying parameter comprises: an arrival direction, an arrival time, and a path amplitude.
- the calculating module 42 is configured to determine a downlink channel response according to the received indication information of the time varying parameter of the first number of strong propagation paths.
- the reconstruction of the downlink channel can be represented by, for example, but not limited to, the former equation (4).
- the user equipment is only assigned a few or even one sub-band.
- a channel on a sub-band The response can be considered flat, and only the feedback reports the channel coefficients assigned to the user equipment, and there is no need to report the channel coefficients over the entire bandwidth.
- the former formula (1) can be rewritten as the former formula (5).
- the channel vector of the j-th sub-carrier can be expressed as the above equation (6).
- the complete bandwidth is divided into multiple sub-bands, and the channel response within each sub-band can be considered flat.
- the average channel vector of the sth sub-band is expressed as fi s , and fi s can be calculated by the above equation (7), where J s represents the number of sub-carriers in one sub-band, and J(s) represents the s-th sub-band A set of subcarriers within, and 5 represents a joint mean of arrival time and path amplitude within the subband. If the user equipment is allocated only the s-th subbands, the user device is only 3 ⁇ 4 feedback report to the base station apparatus [5 can, instead of reporting the complete channel matrix H.
- the first number of strong propagation paths are determined as the joint mean i k , the modulus of s or the K d propagation paths with the highest norm. Without loss of generality, all propagation paths are arranged in descending order of the combined mean of the arrival time and the path amplitude, ie I 1>1 b 2 s ⁇ ⁇ >lb K s I.
- the user equipment may feed back the indication information of the time-varying parameter of the K d strong propagation paths. Since the number of strong propagation paths K d is less than the total number of multipath channel propagation paths K, feedback overhead is reduced.
- Such different periodic feedback modes are adapted to the time-varying characteristics of the channel parameters, further saving feedback overhead.
- the reconstruction of the downlink channel by the calculation module 42 can be represented by, for example, but not limited to, the former equation (8).
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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CN201380075746.2A CN105308882B (zh) | 2013-05-29 | 2013-05-29 | 大规模天线系统中的csi反馈方法和装置 |
EP13885992.1A EP3007366B1 (en) | 2013-05-29 | 2013-05-29 | Csi feedback method and device in large-scale antenna system |
PCT/CN2013/000633 WO2014190452A1 (zh) | 2013-05-29 | 2013-05-29 | 大规模天线系统中的csi反馈方法和装置 |
JP2016515585A JP6386032B2 (ja) | 2013-05-29 | 2013-05-29 | 大規模なアンテナ・システムにおけるcsiフィードバック方法および装置 |
US14/892,320 US10038487B2 (en) | 2013-05-29 | 2013-05-29 | CSI feedback method and apparatus in large scale antenna system |
TW103116616A TWI514806B (zh) | 2013-05-29 | 2014-05-09 | Channel State Information Feedback Method and Device in Large Scale Antenna System |
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PCT/CN2013/000633 WO2014190452A1 (zh) | 2013-05-29 | 2013-05-29 | 大规模天线系统中的csi反馈方法和装置 |
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US (1) | US10038487B2 (zh) |
EP (1) | EP3007366B1 (zh) |
JP (1) | JP6386032B2 (zh) |
CN (1) | CN105308882B (zh) |
TW (1) | TWI514806B (zh) |
WO (1) | WO2014190452A1 (zh) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107359914A (zh) * | 2017-07-03 | 2017-11-17 | 中国人民解放军理工大学 | 基于多径信息的mu‑mimo网络信道状态反馈方法 |
WO2018036253A1 (zh) * | 2016-08-23 | 2018-03-01 | 华为技术有限公司 | 信道状态信息的反馈方法和设备 |
CN109412663A (zh) * | 2017-08-16 | 2019-03-01 | 上海诺基亚贝尔股份有限公司 | 用于mimo通信的方法、设备和计算机可读介质 |
CN112583501A (zh) * | 2019-09-30 | 2021-03-30 | 华为技术有限公司 | 信道测量方法和通信装置 |
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CN110890931B (zh) * | 2019-11-11 | 2021-08-03 | 杭州电子科技大学 | 一种基于改进Prony方法的上行时变信道预测方法 |
CN113315723B (zh) * | 2020-02-27 | 2023-06-27 | 维沃移动通信有限公司 | 时延上报方法、终端设备及网络设备 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101626588A (zh) * | 2008-07-11 | 2010-01-13 | 财团法人工业技术研究院 | 用于信道状态信息反馈的装置及其方法 |
WO2011146606A1 (en) * | 2010-05-19 | 2011-11-24 | Interdigital Patent Holdings, Inc. | Method and apparatus for compressing channel state information based on path location information |
CN102457321A (zh) * | 2010-10-26 | 2012-05-16 | 上海贝尔股份有限公司 | 无线通信系统中的下行链路sinr预测方法、设备和基站 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6795392B1 (en) * | 2000-03-27 | 2004-09-21 | At&T Corp. | Clustered OFDM with channel estimation |
JP2003060558A (ja) | 2001-08-14 | 2003-02-28 | Matsushita Electric Ind Co Ltd | 通信端末装置および基地局装置 |
CN1841985A (zh) | 2005-03-30 | 2006-10-04 | 松下电器产业株式会社 | 多天线系统的有限反馈方法 |
EP2139124B1 (en) | 2008-06-24 | 2014-03-19 | Alcatel Lucent | A method for allocation of parameters for radio transmission in a wireless communication network using channel feedback compression, network elements and a wireless communication network therefor |
JP5134487B2 (ja) | 2008-10-07 | 2013-01-30 | 株式会社光電製作所 | 無線信号測定装置、チャネルサウンダ |
JP5199935B2 (ja) | 2009-03-27 | 2013-05-15 | 株式会社エヌ・ティ・ティ・ドコモ | 時空間チャネルシミュレータ |
JP5175247B2 (ja) | 2009-06-30 | 2013-04-03 | 株式会社エヌ・ティ・ティ・ドコモ | 電波伝搬パラメータ推定装置、電波伝搬パラメータ推定方法 |
CN102377527B (zh) | 2010-08-09 | 2014-12-24 | 上海贝尔股份有限公司 | 一种降低多小区反馈开销的方法和装置 |
-
2013
- 2013-05-29 EP EP13885992.1A patent/EP3007366B1/en active Active
- 2013-05-29 WO PCT/CN2013/000633 patent/WO2014190452A1/zh active Application Filing
- 2013-05-29 US US14/892,320 patent/US10038487B2/en active Active
- 2013-05-29 CN CN201380075746.2A patent/CN105308882B/zh active Active
- 2013-05-29 JP JP2016515585A patent/JP6386032B2/ja not_active Expired - Fee Related
-
2014
- 2014-05-09 TW TW103116616A patent/TWI514806B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101626588A (zh) * | 2008-07-11 | 2010-01-13 | 财团法人工业技术研究院 | 用于信道状态信息反馈的装置及其方法 |
WO2011146606A1 (en) * | 2010-05-19 | 2011-11-24 | Interdigital Patent Holdings, Inc. | Method and apparatus for compressing channel state information based on path location information |
CN102457321A (zh) * | 2010-10-26 | 2012-05-16 | 上海贝尔股份有限公司 | 无线通信系统中的下行链路sinr预测方法、设备和基站 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018036253A1 (zh) * | 2016-08-23 | 2018-03-01 | 华为技术有限公司 | 信道状态信息的反馈方法和设备 |
CN107786250A (zh) * | 2016-08-23 | 2018-03-09 | 华为技术有限公司 | 信道状态信息的反馈方法和设备 |
CN107786250B (zh) * | 2016-08-23 | 2021-04-09 | 华为技术有限公司 | 信道状态信息的反馈方法和设备 |
CN107359914A (zh) * | 2017-07-03 | 2017-11-17 | 中国人民解放军理工大学 | 基于多径信息的mu‑mimo网络信道状态反馈方法 |
CN107359914B (zh) * | 2017-07-03 | 2020-05-22 | 中国人民解放军理工大学 | 基于多径信息的mu-mimo网络信道状态反馈方法 |
CN109412663A (zh) * | 2017-08-16 | 2019-03-01 | 上海诺基亚贝尔股份有限公司 | 用于mimo通信的方法、设备和计算机可读介质 |
CN109412663B (zh) * | 2017-08-16 | 2020-11-13 | 上海诺基亚贝尔股份有限公司 | 用于mimo通信的方法、设备和计算机可读介质 |
CN112583501A (zh) * | 2019-09-30 | 2021-03-30 | 华为技术有限公司 | 信道测量方法和通信装置 |
WO2021063178A1 (zh) * | 2019-09-30 | 2021-04-08 | 华为技术有限公司 | 信道测量方法和通信装置 |
CN112583501B (zh) * | 2019-09-30 | 2023-09-22 | 华为技术有限公司 | 信道测量方法和通信装置 |
Also Published As
Publication number | Publication date |
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JP6386032B2 (ja) | 2018-09-05 |
EP3007366A4 (en) | 2017-01-11 |
TWI514806B (zh) | 2015-12-21 |
US10038487B2 (en) | 2018-07-31 |
EP3007366B1 (en) | 2020-10-28 |
US20160112108A1 (en) | 2016-04-21 |
CN105308882A (zh) | 2016-02-03 |
CN105308882B (zh) | 2018-07-03 |
EP3007366A1 (en) | 2016-04-13 |
JP2016524403A (ja) | 2016-08-12 |
TW201503624A (zh) | 2015-01-16 |
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