WO2011082655A1 - Procédé de mappage, procédé de transmission et système de transmission pour des signaux de référence d'informations d'état de canal - Google Patents

Procédé de mappage, procédé de transmission et système de transmission pour des signaux de référence d'informations d'état de canal Download PDF

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Publication number
WO2011082655A1
WO2011082655A1 PCT/CN2010/080668 CN2010080668W WO2011082655A1 WO 2011082655 A1 WO2011082655 A1 WO 2011082655A1 CN 2010080668 W CN2010080668 W CN 2010080668W WO 2011082655 A1 WO2011082655 A1 WO 2011082655A1
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WO
WIPO (PCT)
Prior art keywords
state information
channel state
reference signal
information reference
orthogonal frequency
Prior art date
Application number
PCT/CN2010/080668
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English (en)
Chinese (zh)
Inventor
姜静
孙云锋
朱常青
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中兴通讯股份有限公司
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Publication of WO2011082655A1 publication Critical patent/WO2011082655A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a channel state information reference signal mapping method, a transmitting method, and a transmitting system.
  • LTE-Advance Long-Term Evolution Advance
  • IMT-Advance International Mobile Telecommunication Advance
  • COMP Coordinate Multipoint Transmission and Reception
  • the LTE/LTE-A system is based on Orthogonal Frequency Division Multiplexing (OFDM) technology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • communication resources are in the form of time-frequency two-dimensional.
  • Each radio frame has a length of 10 milliseconds (ms) and includes 10 subframes of length 1 ms (Sub-frame ), according to the length of the Cyclic Prefix (CP), each subframe may contain 12 or 14 OFDM symbols.
  • ms milliseconds
  • Sub-frame the length of the Cyclic Prefix
  • each subframe may contain 12 or 14 OFDM symbols.
  • resources are divided into sub-carriers.
  • the smallest unit of resource allocation is a resource block (RB), and one physical resource block corresponding to a physical resource (Physical RB, Referred to as PRB), one PRB contains 12 subcarriers in the frequency domain.
  • RB resource block
  • PRB Physical RB
  • Two pilots of LTE-Advanced are defined in the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) 56 conferences: Channel State Information Reference Signal (Channel State Information- Reference Signals (CSI-RS for short) and Demodulation Reference Signals (DMRS), where the channel state information reference signal is cell-specific, and is distributed over time-frequency resources relative to the demodulation pilot. More sparse.
  • CSI-RS Channel State Information- Reference Signals
  • DMRS Demodulation Reference Signals
  • the technical problem to be solved by the present invention is to provide a channel state information reference signal mapping method, a transmitting method, and a transmitting system, which provide a solution for channel state information reference signal distribution on time-frequency resources and mitigate system performance for LTE users. Downgrade, improve channel estimation performance.
  • the present invention provides a mapping method of a channel state information reference signal, the method comprising: the resource element occupied by the channel state information reference signal in the orthogonal frequency division multiplexing symbol of the physical resource block is in the frequency domain Hook distribution.
  • the channel state information reference signal occupies one or two orthogonal frequency division multiplexing symbols in a physical resource block, and preferentially occupies one or two of the 4th, 9th, 10th, and 11th orthogonal frequency division multiplexing symbols One.
  • the number of resource elements occupied by the channel state information reference signal in the orthogonal frequency division multiplexing symbol occupied by the physical resource block is 2, 3, 4, or 6, the orthogonal frequency is divided in each Symbol
  • the eight resource elements are formed into four mapping units, each of which
  • the present invention further provides a method for transmitting a channel state information reference signal, the method comprising: transmitting a channel state information reference signal of a cell on a channel state information reference signal resource, and using a channel state information reference signal resource of the cell
  • the distribution of the channel condition information reference signal is uniformly divided in the frequency domain by the resource elements occupied by the orthogonal frequency division multiplexing symbols of the physical resource block.
  • the channel state information reference signal occupies one or two orthogonal frequency division multiplexing symbols in a physical resource block, and preferentially occupies one or two of the 4th, 9th, 10th, and 11th orthogonal frequency division multiplexing symbols One.
  • the number of resource elements occupied by the channel state information reference signal in the orthogonal frequency division multiplexing symbol occupied by the physical resource block is 2, 3, 4, or 6, the orthogonal frequency is divided in each Symbol
  • the eight resource elements are formed into four mapping units, each wave. ' ' , , ' ⁇ ⁇ -
  • the present invention further provides a system for transmitting a channel state information reference signal, where the system includes a base station, where the base station is configured to: transmit a channel state information reference signal of a cell on a channel state information reference signal resource,
  • the distribution of the channel state information reference signal resources of the cell satisfies the following conditions:
  • the resource elements occupied by the channel state information reference signal in the orthogonal frequency division multiplexing symbols of the physical resource block are uniformly distributed in the frequency domain.
  • the channel state information reference signal occupies one or two orthogonal frequency division multiplexing symbols in a physical resource block, and preferentially occupies one or two of the 4th, 9th, 10th, and 11th orthogonal frequency division multiplexing symbols .
  • the number of resource elements occupied by the channel state information reference signal in the orthogonal frequency division multiplexing symbol occupied by the physical resource block is 2, 3, 4, or 6, the orthogonal frequency is divided in each Symbol
  • the channel state information reference signal is mapped on the entire bandwidth of the frequency domain, because the user of the LTE does not know the transmission of the channel state information reference signal, so the uniform distribution of the channel state information reference signal can reduce the performance of the LTE user. Degraded, in addition, in the LTE-A system, the channel distribution information of the REs of the channel state information reference signal can also obtain more channel information, and the uniformly distributed channel estimation performance is also better than the continuously distributed CSI-RS channel estimation performance.
  • FIG. 1 is a flowchart of a method for transmitting a channel state information reference signal in an embodiment
  • FIG. 2 is a mapping method for a CSI-RS to occupy two REs on one OFDM symbol in an embodiment
  • FIG. 3 is a CSI in an embodiment.
  • FIG. 4 is a mapping method in which CSI-RS occupies four REs on one OFDM symbol in the embodiment
  • FIG. 5 is a CSI-RS in one OFDM symbol in the embodiment
  • FIG. 6 is a mapping method in which the CSI-RS occupies eight REs on one OFDM symbol in the embodiment.
  • the mapping rule of the channel state information reference signal of the LTE-A system in consideration of the problem that the mapping rule of the channel state information reference signal of the LTE-A system is not defined in detail, in order to reduce the influence of the channel state information reference signal on the LTE Release 8 (Release 8), and improve the LTE-A channel measurement Estimating the quality, and defining resource elements (Resource Element, RE) occupied by the channel state information reference signal when mapped on one OFDM symbol are hooked on the subcarriers.
  • resource elements Resource Element, RE
  • the transmitting system of the channel state information reference signal includes a base station, and the base station is configured to: transmit a channel state information reference signal of the cell on the channel state information reference signal resource, and the channel state information reference signal resource distribution of the cell satisfies the following condition:
  • the resource elements occupied by the state information reference signal in the orthogonal frequency division multiplexing symbols of the physical resource block are uniformly distributed in the frequency domain.
  • the channel state information reference signal occupies one or two orthogonal frequency division multiplexers in the physical resource block Number, and preferentially occupy one or both of the 4th, 9th, 10th, and 11th orthogonal frequency division multiplexing symbols.
  • the resource element may be any one of the orthogonal frequency division multiplexing symbols.
  • the channel state information reference signal occupies 2, 3, 4 or 6 resource elements in the orthogonal frequency division multiplexing symbols occupied by the physical resource block, the OFDM symbol is used in each orthogonal frequency division multiplexing symbol.
  • the number of subcarriers between adjacent resource elements in the resource elements occupied is the same.
  • the interval between adjacent resource elements among the resource elements occupied in each orthogonal frequency division multiplexing symbol 1 subcarrier When the number of resource elements occupied by the channel state information reference signal in the orthogonal frequency division multiplexing symbol occupied by the physical resource block is eight, the eight resource elements are formed into four mapping units, and each mapping is performed.
  • the method for transmitting a channel state information reference signal includes: transmitting a channel state information reference signal of a cell on a channel state information reference signal resource, where a channel state information reference signal resource distribution satisfies the following conditions:
  • the resource elements occupied by the information reference signal in the orthogonal frequency division multiplexing symbols of the physical resource block are uniformly distributed in the frequency domain.
  • the mapping method of the channel state information reference signal includes: the channel state information reference signal is in physical
  • the channel state information reference signal transmission method and the mapping method in the channel state information reference signal are distributed in the same manner as in the above-mentioned transmission system, and the resource elements occupied by the orthogonal frequency division multiplexing symbols in the physical resource block are not distributed here. Let me repeat.
  • the two REs occupied by the channel state information reference signal on one OFDM symbol are on the subcarrier. Hook distribution. As shown in FIG.
  • the CSI-RS occupies two REs on one OFDM symbol, and two adjacent REs are separated by 5 subcarriers; wherein the CSI-RS can start from each physical resource block subcarrier 0 of the mapping, or Each physical resource block subcarrier 1 of the mapping starts, or starts from each physical resource block subcarrier 2 of the mapping, or starts from each physical resource block subcarrier 3 of the mapping, and each physical resource block subcarrier from the mapping Start with 4 or start with each physical resource block subcarrier 5 of the map. That is, regardless of the channel state information reference signal is mapped in the first, or second, or third, or fourth, or fifth, or sixth subcarrier, two adjacent CSI-RS REs are always 5 subcarriers are spaced apart.
  • the three REs occupied by the channel state information reference signal on one OFDM symbol are on the subcarrier. Hook distribution.
  • the CSI-RS occupies three REs on one OFDM symbol, and two adjacent REs are separated by three subcarriers; wherein the CSI-RS can start from each physical resource block subcarrier 0 of the mapping, or Each physical resource block of the mapping starts with subcarrier 1, starting from each physical resource block subcarrier 2 of the mapping, or starting from each physical resource block subcarrier 3 of the mapping. That is, regardless of the channel state information reference signal is mapped in the first, or second, or third, or fourth subcarrier On the wave, two adjacent CSI-RS REs are always separated by 3 subcarriers.
  • the four REs occupied by the channel state information reference signal on one OFDM symbol are on the subcarrier. Hook distribution.
  • the CSI-RS occupies four REs on one OFDM symbol, and two adjacent REs are separated by 2 subcarriers; wherein the CSI-RS can start from each physical resource block subcarrier 0 of the mapping, or Each physical resource block of the mapping starts with subcarrier 1 or starts with each physical resource block subcarrier 2 of the mapping. That is, regardless of whether the channel state information reference signal is mapped on the first, or second, or third subcarrier, two adjacent CSI-RS REs are always spaced by 2 subcarriers.
  • the six REs occupied by the channel state information reference signal on one OFDM symbol are on the subcarrier. Hook distribution.
  • the CSI-RS occupies six REs on one OFDM symbol, and two adjacent REs are separated by one subcarrier; wherein the CSI-RS can start from each physical resource block subcarrier 0 of the mapping, or Each physical resource block of the mapping starts with subcarrier 1. That is, regardless of whether the channel state information reference signal is mapped on the first one or the second subcarrier, two adjacent CSI-RS REs are always separated by one subcarrier.
  • the eight REs occupied by the channel state information reference signal on one OFDM symbol are on the subcarrier. Hook distribution.
  • the CSI-RS occupies eight REs on one OFDM symbol, and the eight resource elements are formed into four mapping units, and each mapping unit includes two adjacent resources. The mapping units are separated by 1 subcarrier. There are three mapping methods as shown in FIG. 6. That is, regardless of whether the starting position of the mapping unit is the first one of the OFDM symbols, or the second, or the third subcarrier, two adjacent mapping units are always separated by 1 subcarrier.
  • Simulation experiments are carried out according to the present invention.
  • the simulation conditions are QPSK modulation, 1/3 Turbo coding, the mobile terminal has a moving speed of 30 km/h, the CSI-RS transmission period is 2 ms, and the performance of the uniformly distributed CSI-RS RE for LTE users. Degraded less than a continuously distributed CSI-RS RE.
  • the uniformly distributed CSI-RS has little impact on LTE users, and is better than CSI-RS evenly distributed in the bandwidth, which can provide more abundant channel information, which is beneficial for LTE-Advanced users to improve the channel.
  • the estimated quality of the measurement are QPSK modulation, 1/3 Turbo coding, the mobile terminal has a moving speed of 30 km/h, the CSI-RS transmission period is 2 ms, and the performance of the uniformly distributed CSI-RS RE for LTE users. Degraded less than a continuously distributed CSI-RS RE.
  • each module unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.
  • the present invention maintains the CRS transmission of the LTE system, has little impact on LTE users, and provides pilot information required for high-order MIMO and COMP, which is beneficial for LTE-Advanced users to improve single-link quality.
  • the performance degradation of LTE users is reduced, and the design overhead is low, which can ensure the performance of channel measurement and improve the throughput of LTE-A system.

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

Abstract

La présente invention se rapporte à un procédé de transmission pour des signaux de référence d'informations d'état de canal (CSI-RS). Le procédé selon l'invention consiste : à transmettre les CSI-RS d'une cellule sur des ressources CSI-RS, la distribution des ressources CSI-RS de la cellule satisfaisant à la condition suivante : les éléments de ressources dans le symbole de multiplexage par répartition orthogonale de la fréquence (OFDM) d'un bloc de ressources physique (RB) occupé par les CSI-RS sont uniformément distribués dans le domaine fréquentiel (102). La présente invention se rapporte également à un procédé de mappage ainsi qu'à un système de transmission pour des CSI-RS. La solution technique de la présente invention permet de réduire la dégradation des performances pour des utilisateurs de la technologie d'évolution à long terme (LTE), ce qui leur permet ainsi d'obtenir davantage d'informations de canal.
PCT/CN2010/080668 2010-01-06 2010-12-31 Procédé de mappage, procédé de transmission et système de transmission pour des signaux de référence d'informations d'état de canal WO2011082655A1 (fr)

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CN2010100022093A CN102118340A (zh) 2010-01-06 2010-01-06 信道状态信息参考信号的映射方法及发送方法及发送系统
CN201010002209.3 2010-01-06

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WO2014176813A1 (fr) * 2013-04-28 2014-11-06 华为技术有限公司 Procédé de retour d'information sur un indicateur de matrice de précodage, extrémité réceptrice et extrémité émettrice
US11108521B2 (en) * 2014-09-11 2021-08-31 Samsung Electronics Co., Ltd. Method for transmitting and receiving reference signal in wireless communication system

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US20140226582A1 (en) * 2011-07-19 2014-08-14 Erlin Zeng Method and Apparatus for Providing Channel State Information (CSI) Measurement and Reporting for a Segment Carrier
CN102307081A (zh) * 2011-08-19 2012-01-04 电信科学技术研究院 一种发送和接收csi的方法、系统及设备
CN103580835B (zh) * 2012-08-02 2018-08-14 中兴通讯股份有限公司 在干扰测量资源上进行干扰测量的方法及设备
CN104038320B (zh) 2013-03-04 2019-03-01 中兴通讯股份有限公司 资源映射、接收方法及装置、信令通知、获取方法及装置
CN107277822B (zh) * 2016-04-07 2020-01-03 中国移动通信有限公司研究院 一种信号传输方法及网络设备
CN107809799A (zh) * 2016-09-08 2018-03-16 北京信威通信技术股份有限公司 一种发送物理信道参考信号的方法及装置
JP6893241B2 (ja) * 2016-12-19 2021-06-23 オッポ広東移動通信有限公司Ｇｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． 信号の伝送方法、ネットワーク装置及び端末装置
CN108365933B (zh) * 2017-01-26 2023-07-18 华为技术有限公司 一种发送参考信号的方法及装置
CN109687947B (zh) * 2017-05-05 2020-03-10 华为技术有限公司 一种参考信号图样的传输方法及其装置
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WO2014176813A1 (fr) * 2013-04-28 2014-11-06 华为技术有限公司 Procédé de retour d'information sur un indicateur de matrice de précodage, extrémité réceptrice et extrémité émettrice
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US9577724B2 (en) 2013-04-28 2017-02-21 Huawei Technologies Co., Ltd. Precoding matrix indicator feedback method, receive end, and transmit end
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US11108521B2 (en) * 2014-09-11 2021-08-31 Samsung Electronics Co., Ltd. Method for transmitting and receiving reference signal in wireless communication system

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