WO2012088845A1 - Procédé et dispositif de transmission de données et unité radio distante - Google Patents

Procédé et dispositif de transmission de données et unité radio distante Download PDF

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Publication number
WO2012088845A1
WO2012088845A1 PCT/CN2011/076070 CN2011076070W WO2012088845A1 WO 2012088845 A1 WO2012088845 A1 WO 2012088845A1 CN 2011076070 W CN2011076070 W CN 2011076070W WO 2012088845 A1 WO2012088845 A1 WO 2012088845A1
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WO
WIPO (PCT)
Prior art keywords
rru
path loss
unit
loss value
difference
Prior art date
Application number
PCT/CN2011/076070
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English (en)
Chinese (zh)
Inventor
李龙文
沈伟
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012088845A1 publication Critical patent/WO2012088845A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the present invention relates to the field of communications, and in particular to a data transmission method, apparatus, and radio remote unit (RRR)fair background technology in a high-speed train environment
  • UE User Equipment
  • RRR radio remote unit
  • UE User Equipment
  • Rapid changes such as from a negative frequency offset of thousands of Hz to a positive frequency offset of thousands of Hz.
  • the specific frequency offset speed and range are related to the speed of the vehicle and the three-way separation from the base station to the railway.
  • FIG. 1 is a distribution diagram of RRUs and UEs in a single-cell multi-RRU in a high-speed rail scenario according to the related art. As shown in Figure 1, the UE receives downlinks from each RRU. The Doppler frequency offset occurs on the signal.
  • the UE When the UE passes through the RRUs in the direction of the high-speed rail, the UE starts to move from the RRU1.
  • the UE receives the negative frequency offset signal from the RRU1 and also receives the positive frequency offset signal from the RRU2.
  • the RRU1 and RRU2 When the RRU1 and RRU2 are in the middle position, the delays of the two signals arriving at the UE are the same.
  • the two multipath signals with the same delay but equal energy but opposite frequency offset will cause the UE to experience a sharp deterioration of the receiving performance, which may result in the UE.
  • an effective solution has not been proposed yet.
  • the main purpose of the present invention is to provide a data transmission method, apparatus, and RRU, to solve at least the multipath signals with the same delay and opposite frequency offsets received by the coverage overlap area UEs of the two RRUs. Reception problems sharp deterioration in performance.
  • a data transmitting method is provided.
  • the data transmission method includes: determining a first path loss value of a first remote radio unit (RRU) to reach the terminal and a second path loss value of the second RRU reaching the terminal, wherein the first RRU and the second RRU In the adjacent position; the difference between the first path loss value and the second path loss value is a predetermined path loss value to determine a delay difference between the first RRU and the second RRU transmission data; and the message carrying the time delay is sent to The first RRU or the second RRU performs data transmission of the first RRU or the second RRU.
  • RRU remote radio unit
  • the method further includes: the first RRU or the second RRU receiving the message carrying the time difference; and the delay of the first RRU or the second RRU at the current time of sending the data Data is transmitted at a first time of the post-delay difference or a second time of the advancing delay difference.
  • the device includes: a first determining module, configured to determine a first path loss value of the first remote radio unit RRU reaching the terminal and a second path loss value of the second RRU reaching the terminal, where the first RRU and the second RRU are in phase a second determining module, configured to determine a delay difference between the first RRU and the second RRU transmission data by using a difference between the first path loss value and the second path loss value as the predetermined path loss value; And sending, by the following formula, a first path loss value determining module, configured to: send a message carrying a time delay to the first RRU or the second RRU to send data of the first RRU or the second RRU.
  • a first determining module includes a second path loss determination means for determining a second path loss value by the following equation:.
  • d is the distance of the second communication terminal RRU and the unit is km
  • f is the center frequency in MHz
  • h b to the base station effective antenna height in meters
  • h m is the effective height of the mobile station
  • the unit is meter
  • pen 1 is the correction factor of the open field
  • L is the path loss
  • the unit is db.
  • the RRU includes: a receiving module configured to receive a message carrying a delay difference for transmitting data; and a second sending module configured to transmit data currently The first moment of the delay of the delay or The data is transmitted at the second moment of the pre-delay difference.
  • the downlink signal transmission delay of the adjacent two RRUs is staggered by the method of delaying the transmission by the RRU, and the coverage overlap area of the two RRUs is solved.
  • the problem that the receiving performance is drastically deteriorated when the multi-path signal with the same delay and opposite frequency offset is received by the UE improves the receiving performance of the receiver of the UE.
  • the accompanying drawings are used to provide a further understanding of the present invention.
  • FIG. 1 is a single-cell multi-station in a high-speed rail scene according to the related art.
  • FIG. 2 is a flowchart of a data transmission method according to an embodiment of the present invention;
  • FIG. 3 is a frequency offset method for a single-cell multi-RRU scheme in a high-speed coverage scenario according to an embodiment of the present invention;
  • FIG. 4 is a schematic diagram of downlink signal path loss difference of two adjacent RRUs arriving at a UE according to an embodiment of the present invention;
  • FIG. 5 is a block diagram showing a UE comparison test result of a DPA service before and after the implementation of the present invention in a single-cell multi-RRU coverage scenario in a high-speed rail scenario;
  • FIG. 6 is a structural block diagram of a data transmitting apparatus according to an embodiment of the present invention;
  • 7 is a block diagram showing a preferred configuration of a data transmitting apparatus according to an embodiment of the present invention;
  • FIG. 8 is a structural block diagram of an RRU according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a data transmission method according to an embodiment of the present invention.
  • the method includes: Step S202: determining a first remote radio unit (RRU) a first path loss value arriving at the terminal and a second path loss value at which the second RRU arrives at the terminal, wherein the first RRU and the second RRU are in adjacent positions.
  • Step S204 Determine a delay difference between the first RRU and the second RRU transmission data according to the difference between the first path loss value and the second path loss value as the predetermined path loss value.
  • RRU remote radio unit
  • Step S206 Send a message carrying the time difference difference to the first RRU or the second RRU to send data of the first RRU or the second RRU, that is, the first RRU or the second RRU sends data according to the message carrying the time difference difference.
  • n chip chip
  • step S202 a preferred embodiment of step S202 is described below.
  • the communication between the RRU and the terminal is large, the unit is km, f is the center frequency, the unit is MHz, h b is the effective height of the base station antenna, the unit is meter, h m is the effective height of the mobile station, the unit is meter, a (h m )
  • the mobile station antenna height correction factor, ⁇ 1 is the correction factor of the open field, and L is the path loss, and the unit is db.
  • a preferred embodiment of step S202 is described below.
  • the second RRU is determined to reach the terminal.
  • the communication between the RRU and the terminal is large, the unit is km, f is the center frequency, the unit is MHz, h b is the effective height of the base station antenna, the unit is meter, h m is the effective height of the mobile station, the unit is meter, a (h m )
  • the COST231-Hata model is used for the path loss calculation. Since the wireless environment is changeable, the calculation based on the embodiment may be performed by using other path loss models applicable to the environment when calculating the path loss calculation.
  • the method further includes: Or the second RRU receives the message carrying the time difference difference; the first RRU or the second RRU sends the data at the first time of the delay time difference of the current data transmission time or the second time of the advance time difference difference.
  • the embodiment provides a data transmission method.
  • the embodiment combines the foregoing embodiments and preferred embodiments thereof.
  • FIG. 3 is a frequency offset metric in a single-cell multi-RRU scheme for a high-speed coverage scenario according to an embodiment of the present invention. Flowchart shown in FIG. 3, the method comprising: Step S302: using COST231-Hata model for pathloss calculation,
  • Step S306 The delay difference 8.9chip (chip) calculated in S304 is configured to the delay module in the RRU.
  • DPA downlink packet access
  • FIG. 6 is a structural block diagram of a data transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus includes: a first determining module 62, a second determining module 64, and a first A transmitting module 66 is described in detail below.
  • the first determining module 62 is configured to determine a first path loss value of the first remote radio unit RRU reaching the terminal and a second path loss value of the second RRU reaching the terminal.
  • the first RRU and the second RRU are in an adjacent position; the second determining module 64 is connected to the first determining module 62, and is configured to be the first path loss value and the second path loss determined by the first determining module 62.
  • the difference between the values is a predetermined path loss value to determine a delay difference between the first RRU and the second RRU transmission data;
  • the first sending module 66 is connected to the second determining module 64, and is configured to carry the second determining module 64 to determine the carrying time.
  • the message of the delay is sent to the first RRU or the second RRU for data transmission of the first RRU or the second RRU.
  • FIG. 7 is a block diagram of a preferred structure of a data transmitting apparatus according to an embodiment of the present invention. As shown in FIG.
  • the first determining module 62 includes: a first path loss value determining module 622 and a second path loss value determining module 624.
  • FIG. 8 is a structural block diagram of an RRU according to an embodiment of the present invention.
  • the apparatus includes: a receiving module 82, and a second sending module 84.
  • the receiving module 82 is configured to receive a message carrying a delay difference for data transmission;
  • the second sending module 84 is connected to the receiving module 82, and is set to be the first delay of the delay time at the current data transmission time.
  • the data is sent at the second moment of the time difference or the advance delay.
  • a data sending method, a device, and an RRU are provided, and the downlink signal transmission of the adjacent two RRUs is performed by the RRU staggering the delay transmission method.
  • the delay is delayed, and the problem that the reception performance is drastically deteriorated when the multi-path signals with the same delay and opposite frequency offsets received by the UEs in the coverage overlap area of the two RRUs are solved, and the receiving performance of the receiver of the UE is improved. Jointly consider the power requirements of the multiplexed users, so that the total power is as small as possible, and the power of each user can ensure that both users can work normally, and - according to the user in real time
  • the signal state adjusts the power ratio of the two users to optimize the overall system performance.
  • a single computing device or distributed over a network of computing devices, optionally, they may be implemented in program code executable by the computing device, such that they may be stored in the storage device by the computing device
  • the steps shown or described may be performed in a different order than here, or they may be separated It is implemented by making individual integrated circuit modules, or by making a plurality of modules or steps of them into a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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

Abstract

L'invention concerne un procédé et un dispositif de transmission de données et une unité radio distante (RRU). Le procédé comprend les étapes suivantes : déterminer une première valeur de perte de trajet d'une première unité RRU à un terminal et une seconde valeur de perte de trajet d'une seconde unité RRU au terminal (S202), la première unité RRU et la seconde unité RRU étant adjacentes; déterminer une différence de retard temporel entre les émissions de données provenant de la première unité RRU et de la seconde unité RRU en fonction d'une perte de trajet prédéterminée qui est la différence entre la première perte de trajet et la seconde perte de trajet (S204); envoyer un message contenant la différence de retard temporel à la première unité RRU ou à la seconde unité RRU afin de commander la transmission de données à partir de la première unité RRU ou de la seconde unité RRU (S206). La présente invention permet d'améliorer les performances de réception du terminal récepteur.
PCT/CN2011/076070 2010-12-30 2011-06-21 Procédé et dispositif de transmission de données et unité radio distante WO2012088845A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2010106149280A CN102111196A (zh) 2010-12-30 2010-12-30 数据发送方法、装置及远程射频单元
CN201010614928.0 2010-12-30

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WO2012088845A1 true WO2012088845A1 (fr) 2012-07-05

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Cited By (1)

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CN103249053A (zh) * 2012-02-09 2013-08-14 中兴通讯股份有限公司 用户设备的调度和业务配置方法及装置

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CN103326771B (zh) * 2012-03-23 2016-04-06 京信通信系统（中国）有限公司 Rru光纤链路管理方法、装置及射频拉远单元系统
CN106357308A (zh) * 2016-08-31 2017-01-25 北京钧威科技有限公司 基于空间分集和位置分集相结合的接收方法及系统
CN109495414B (zh) * 2017-09-12 2020-07-03 电信科学技术研究院 一种频偏估计方法、装置、设备及计算机可读存储介质
CN108037375B (zh) * 2017-12-28 2020-02-21 金卡智能集团股份有限公司 用于设备天线的频偏测试方法
CN117255404A (zh) * 2022-06-10 2023-12-19 中兴通讯股份有限公司 隧道定位方法、装置、系统及存储介质

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