WO2010121541A1 - Procédé de mappage et station de base associée - Google Patents

Procédé de mappage et station de base associée Download PDF

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Publication number
WO2010121541A1
WO2010121541A1 PCT/CN2010/071930 CN2010071930W WO2010121541A1 WO 2010121541 A1 WO2010121541 A1 WO 2010121541A1 CN 2010071930 W CN2010071930 W CN 2010071930W WO 2010121541 A1 WO2010121541 A1 WO 2010121541A1
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WO
WIPO (PCT)
Prior art keywords
channel measurement
antenna ports
subcarrier
physical resource
frequency division
Prior art date
Application number
PCT/CN2010/071930
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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 WO2010121541A1 publication Critical patent/WO2010121541A1/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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • 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
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to wireless communications, and more particularly to a Channel State Information Reference Signal (CSI-RS) and a physical resource in a Long-Term Evolution Advanced (LTE-A) system.
  • CSI-RS Channel State Information Reference Signal
  • LTE-A Long-Term Evolution Advanced
  • Block (Resource Block) referred to as
  • the technical problem to be solved by the present invention is to overcome the above problems, and to provide a method for mapping a channel measurement pilot and a physical resource block and a corresponding base station, which can save system overhead and long-term evolution (Long-Term Evolution, referred to as LTE) System users have little impact on performance.
  • LTE Long-Term Evolution
  • the present invention provides a mapping method, which is applied to an advanced long-term evolution system, including: a base station setting one or more antenna ports, using a common pilot specified in a long-term evolution system as a channel measurement pilot, and The channel measurement pilots of other antenna ports are set to avoid the mapping positions of the common pilot and downlink dedicated pilots of the long term evolution system, thereby implementing mapping of channel measurement pilots and physical resource blocks.
  • One or more antenna ports are 1 or 2 antenna ports;
  • the base station sets channel measurement pilots of other antenna ports on the sixth or 9th or 11th or 14 orthogonal frequency division multiplexing symbols of the physical resource block; or one or Multiple antenna ports are 4 antenna ports;
  • the base station sets the channel measurement pilots of the other antenna ports to be distributed on the 6th or 11th or 14th orthogonal frequency division multiplexing symbols of the physical resource block.
  • the number of subcarriers separated by channel measurement pilots of the same antenna port in the other antenna ports is a divisor of 12 or a multiple of 12.
  • the number of separated subcarriers between the channel measurement pilots of the same antenna port in the other antenna ports is 6, 12 or 24.
  • the channel measurement pilots of the other antenna ports are located in the physical resource block in an orthogonal frequency division multiplexing symbol, or in multiple orthogonal frequencies. Sub-multiplex symbol.
  • the mapping method further includes: for each subframe configured with a channel measurement pilot, the base station maps the channel measurement pilot to the physical resource block, and sends the signal through the antenna port. In the step of transmitting, the base station sends the channel measurement pilot according to a fixed period.
  • the one or more antenna ports are antenna ports 0 ⁇ 3; in the step of setting other antenna ports, the channel measurement pilot of the antenna port 4 is mapped to the sixth orthogonal frequency division multiplexing symbol of each physical resource block.
  • the channel measurement pilot of antenna port 5 is mapped to the subcarrier of the sixth orthogonal frequency division multiplexing symbol of each physical resource block 3, on the subcarrier 9 of the 14th orthogonal frequency division multiplexing symbol;
  • the channel measurement pilot of the antenna port 6 is mapped to the subcarrier 6 of the 6th orthogonal frequency division multiplexing symbol of each physical resource block Up, and on the subcarrier 0 of the 14th orthogonal frequency division multiplexing symbol; antenna port
  • the channel measurement pilot of 7 is mapped to subcarrier 9 of the sixth orthogonal frequency division multiplexing symbol of each physical resource block, and to subcarrier 3 of the 14th orthogonal frequency division multiplexing symbol.
  • the one or more antenna ports are antenna ports 0 ⁇ 3; in the step of setting other antenna ports, the channel measurement pilot of the antenna port 4 is mapped to the 14th orthogonal frequency division multiplexing symbol of each physical resource block.
  • the channel measurement pilot of antenna port 5 is mapped to subcarrier 3 of the 14th orthogonal frequency division multiplexing symbol of each physical resource block; the channel measurement pilot of antenna port 6 is mapped to each physical resource
  • the 14th orthogonal frequency division multiplexing symbol of the block is on the subcarrier 6; the channel measurement pilot of the antenna port 7 is mapped to the subcarrier 9 of the 14th orthogonal frequency division multiplexing symbol of each physical resource block.
  • the one or more antenna ports are antenna ports 0 ⁇ 3; in the step of setting other antenna ports, the channel measurement pilot of the antenna port 4 is mapped to the 14th orthogonal frequency division multiplexing symbol of each physical resource block.
  • the symbol is used on subcarrier 4 and subcarrier 10.
  • the present invention provides a base station, which is applied to an advanced long-term evolution system, where the base station is configured to: set one or more antenna ports to use a common pilot specified in a long-term evolution system as a channel measurement pilot, And setting channel measurement pilots of other antenna ports to avoid the mapping positions of the common pilot and downlink dedicated pilots of the long term evolution system, thereby supporting mapping of channel measurement pilots to physical resource blocks.
  • One or more antenna ports are 1 or 2 antenna ports, and the channel measurement pilots of the other antenna ports are set to be set as follows: Channel measurement pilots of other antenna ports are distributed in the 6th or 9th or 11th of the physical resource block. Or 14 orthogonal frequency division multiplexing symbols; or One or more antenna ports are 4 antenna ports, and the channel measurement pilots of the other antenna ports are set to be set as follows: Channel measurement pilots of other antenna ports are distributed in the 6th or 11th or 14th of the physical resource blocks. The frequency division is multiplexed on the symbol.
  • the channel measurement pilots of the other antenna ports are set to be set as follows: the channel measurement pilots of the other antenna ports have a frequency domain start position on the orthogonal frequency division multiplexing symbols in the physical resource block.
  • Dijon ⁇ subcarriers, 1 , 2 or 3; or channel measurement pilots of other antenna ports are set to be set as follows: the number of subcarriers separated by 12 channel measurement pilots of the same antenna port in the other antenna ports Or a multiple of 12; or set the channel measurement pilot of the other antenna port is set to: the number of subcarriers separated by channel measurement pilots of the same antenna port in the other antenna ports is 6, 12 or 24; or The channel measurement pilots of the other antenna ports are set as follows: among the other antenna ports, channel measurement pilots of one antenna port are located in one orthogonal frequency division multiplexing symbol in the physical resource block, or are located in multiple orthogonal Frequency division multiplexing symbols.
  • the base station uses all or part of the common pilot as a partial CSI-RS, and does not need to transmit the channel measurement pilot at the common pilot transmitting antenna port, thereby greatly saving pilot overhead;
  • the CSI-RS is not defined in the LTE physical layer standard, the LTE user cannot identify the CSI-RS transmitted on the physical resource block, and the LTE user will use the CSI-RS as the wrong symbol in the received data;
  • the newly added CSI-RS is sparsely distributed on each RB, and the original performance degradation of LTE is small;
  • the number of sub-carriers separated by CSI-RS of each antenna port is a divisor or multiple of 12 sub-carriers on each RB, which is convenient for CSI-RS to be evenly distributed over the entire bandwidth.
  • the CSI-RS of the antenna port can be sent evenly at intervals of each antenna port, which is beneficial for reducing the degradation of the LTE system;
  • FIG. 1 is a common pilot and downlink dedicated pilot pattern for a normal cyclic prefix frame structure.
  • 2 is a mapping diagram of a CSI-RS and a physical resource block in the first embodiment;
  • FIG. 3 is a mapping diagram of a CSI-RS and a physical resource block in the second embodiment;
  • FIG. 4 is a CSI-RS and a physical resource block in the third embodiment.
  • FIG. 5 is a mapping diagram of a CSI-RS and a physical resource block of Embodiment 4;
  • FIG. 6 is a mapping diagram of a CSI-RS and a physical resource block of Embodiment 5;
  • FIG. 7 is a CSI-RS of Embodiment 6.
  • FIG. 8 is a mapping diagram of a CSI-RS and a physical resource block in Embodiment 7;
  • FIG. 9 (A) ⁇ (B) are a mapping pattern of a CSI-RS and a physical resource block in Embodiment 8; .
  • RB physical resource block
  • OFDM orthogonal frequency division multiplexing
  • RB is the basic unit of physical resource allocation in an OFDM system, as shown in Figure 1. Since the LTE system supports up to 4 antennas, the common pilot of antenna ports 0, 1, 2, 3 has defined its pilot pattern in the LTE system, as shown in Figure 1. Based on this, the present invention uses common pilots in the mapping of CSI-RS and physical resource blocks in channel quality indication estimation.
  • the base station sets one or more (preferably 4, 2 or 1) antenna ports to use the original LTE.
  • the common pilots specified in the system are used as CSI-RSs, and the CSI-RSs of other antenna ports are set to avoid the mapping positions of the common pilots and downlink dedicated pilots of the original LTE system:
  • the base station sets 4 antenna ports, the original LTE is used.
  • the base station sets the CSI-RS of other antenna ports to be distributed on the 6th or 11th or 14th OFDM symbols of the RB; when the base station sets 2 antenna ports, it is used in the original LTE system.
  • the base station When the specified common pilot is used as the CSI-RS, the base station sets the CSI-RS of other antenna ports to be distributed on the 6th or 9th or 11th or 14th OFDM symbols of the RB; when the base station sets 1 antenna port to be used in the original LTE system
  • the base station sets the CSI-RSs of other antenna ports to be distributed on the 6th or 9th or 11th or 14th OFDM symbols of the RB.
  • the number of subcarriers separated by CSI-RSs of the same antenna port is about a multiple or multiple of 12, preferably 6 or 12 or 24 subcarriers.
  • the CSI-RS of one antenna port may be located in one OFDM symbol or multiple OFDM symbols in the RB; for each CSI-RS configuration, the transmitting subframe, the base station will be in the above manner
  • the CSI-RS is mapped to the physical resource block and sent out through the antenna port.
  • the subframe that is sent by the CSI-RS configuration refers to: a subframe that carries the CSI-RS.
  • the base station may continuously transmit the CSI-RS according to the above mapping manner, or may uniformly transmit the CSI-RS according to a fixed period at each antenna port.
  • the CSI-RS transmission period of the cell is higher than the upper layer of the base station (the layer above the MAC layer) is 5 ms
  • the CSI-RS is transmitted once every 5 ms according to the above mapping manner, and the CSI-RS is not transmitted in the four subframes.
  • the base station maps the CSI-RS to the physical resource block in the above manner, and sends the packet through the antenna port.
  • the time interval (ie, the transmission period) sent by the CSI-RS may be allocated by the upper layer according to the number of LTE-A users of the cell and the speed of the user. Each cell is configured.
  • Embodiment 1 As shown in FIG. 2, the base station sets the antenna port 0 ⁇ 3, and uses the common pilot specified in LTE as the CSI-RS.
  • the CSI-RSs of other antenna ports are mapped as follows:
  • the CSI-RS of antenna port 4 is mapped to the subcarrier of the sixth OFDM symbol of each RB.
  • the CSI-RS of antenna port 5 is mapped to subcarrier 9 of the sixth OFDM symbol of each RB;
  • the CSI-RS of antenna port 6 is mapped to subcarrier 3 of the 14th OFDM symbol of each RB;
  • the CSI-RS of antenna port 7 is mapped to subcarrier 9 of the 14th OFDM symbol of each RB;
  • the base station For each CSI-RS configuration transmitted subframe, the base station maps the CSI-RS to the physical resource block in the above manner, and sends the packet through the antenna port. On the full bandwidth, the CSI-RS of each antenna port in antenna ports 4 ⁇ 7 is separated by 12 subcarriers.
  • Embodiment 2 As shown in FIG. 3, the base station sets the antenna port 0 ⁇ 3, and uses the common pilot specified in LTE as the common pilot.
  • CSI-RS CSI-RS of other antenna ports are mapped as follows:
  • the CSI-RS of antenna port 4 is mapped to the subcarrier of the sixth OFDM symbol of each RB.
  • the CSI-RS of antenna port 5 is mapped to subcarrier 9 of the sixth OFDM symbol of each RB; 3.
  • the CSI-RS of antenna port 6 is mapped to the subcarrier of the 11th OFDM symbol of each RB.
  • the CSI-RS of antenna port 7 is mapped to subcarrier 6 of the 11th OFDM symbol of each RB (physical resource block); for each CSI-RS configuration transmitted subframe, the base station will CSI-RS as described above It is mapped to a physical resource block and sent out through the antenna port.
  • the CSI-RS of each antenna port in antenna ports 4 ⁇ 7 is separated by 12 subcarriers.
  • Embodiment 3 As shown in FIG. 4, the base station sets the antenna port 0 ⁇ 3, and uses the common pilot specified in LTE as the CSI-RS.
  • the CSI-RSs of other antenna ports are mapped as follows:
  • the CSI-RS of antenna port 4 is mapped to subcarrier 0 of the 6th OFDM symbol of each RB, and to the subcarrier 6 of the 14th OFDM symbol; 2.
  • the CSI-RS of antenna port 5 is mapped to each RB 6th OFDM symbol on subcarrier 3, and 14th OFDM symbol subcarrier 9;
  • the CSI-RS of antenna port 6 is mapped to subcarrier 6 of the sixth OFDM symbol of each RB, and subcarrier 0 of the 14th OFDM symbol;
  • the CSI-RS of antenna port 7 is mapped to subcarrier 9 of the 6th OFDM symbol of each RB, and to subcarrier 3 of the 14th OFDM symbol; the subframe transmitted for each CSI-RS configuration,
  • the base station maps the CSI-RS to the physical resource block in the above manner, and sends the CSI-RS through the antenna port.
  • the CSI-RS of each antenna port in antenna ports 4 to 7 is separated by 6 subcarriers.
  • Embodiment 4 As shown in FIG. 5, the base station sets antenna ports 0 ⁇ 3, and uses the common pilot specified in LTE as the CSI-RS.
  • the CSI-RSs of other antenna ports are mapped as follows:
  • the CSI-RS of antenna port 4 is mapped to subcarrier 2 and subcarrier 8 of the sixth OFDM symbol of each RB; 2.
  • the CSI-RS of antenna port 5 is mapped to the sub-sixth OFDM symbol of each RB Carrier 5 and subcarrier 11;
  • the CSI-RS of antenna port 6 is mapped to subcarrier 2 and subcarrier 8 of the 14th OFDM symbol of each RB;
  • the CSI-RS of the antenna port 7 is mapped to the subcarrier 5 and the subcarrier 11 of the 14th OFDM symbol of each RB; for each CSI-RS configuration transmitted subframe, the base station maps the CSI-RS in the above manner Go to the physical resource block and send it out through the antenna port. On the full bandwidth, the CSI-RS of each antenna port in antenna ports 4 to 7 is separated by 6 subcarriers.
  • Embodiment 5 As shown in FIG. 6, the base station sets the antenna port 0 ⁇ 3, and uses the common pilot specified in LTE as the CSI-RS.
  • the CSI-RSs of other antenna ports are mapped as follows:
  • the CSI-RS of antenna port 4 is mapped to the subcarrier of the 14th OFDM symbol of each RB.
  • the CSI-RS of the antenna port 5 is mapped to the subcarrier 3 of the 14th OFDM symbol of each RB;
  • the CSI-RS of antenna port 6 is mapped to the subcarrier of the 14th OFDM symbol of each RB.
  • the CSI-RS of antenna port 7 is mapped to subcarrier 9 of the 14th OFDM symbol of each RB; for each CSI-RS configuration transmitted subframe, the base station maps the CSI-RS to the object in the manner described above On the resource block, it is sent out through the antenna port.
  • the CSI-RS of each antenna port in antenna ports 4 ⁇ 7 is separated by 12 subcarriers.
  • the base station sets the antenna port 0 ⁇ 3, and uses the common pilot specified in LTE as the CSI-RS.
  • the CSI-RSs of other antenna ports are mapped as follows:
  • the CSI-RS of antenna port 4 is mapped to subcarrier 0 and subcarrier 6 of the 14th OFDM symbol of each RB; 2.
  • the CSI-RS of antenna port 5 is mapped to the sub-fourth OFDM symbol of each RB On carriers 1 and 7;
  • the CSI-RS of antenna port 6 is mapped to subcarrier 3 and subcarrier 9 of the 14th OFDM symbol of each RB;
  • the CSI-RS of antenna port 7 is mapped to subcarrier 4 and subcarrier 10 of the 14th OFDM symbol of each RB; for each CSI-RS configuration transmitted subframe, the base station maps CSI-RS in the above manner Go to the physical resource block and send it out through the antenna port.
  • the CSI-RS of each antenna port in antenna ports 4 to 7 is separated by 6 subcarriers.
  • the base station sets the antenna port 0 ⁇ 1, uses the common pilot specified in LTE as the CSI-RS, and does not transmit the common pilot of the antenna port 2 ⁇ 3 on the full bandwidth resource.
  • the CSI-RSs of other antenna ports are mapped as follows:
  • the CSI-RS of antenna port 2 is mapped to subcarrier 0 of the sixth OFDM symbol of each RB; 2.
  • the CSI-RS of antenna port 3 is mapped to subcarrier 6 of the sixth OFDM symbol of each RB;
  • the CSI-RS of antenna port 4 is mapped to the subcarrier of the 11th OFDM symbol of each RB.
  • the CSI-RS of antenna port 5 is mapped to the subcarrier of the 11th OFDM symbol of each RB.
  • the CSI-RS of antenna port 6 is mapped to the subcarrier of the 14th OFDM symbol of each RB.
  • the CSI-RS of antenna port 7 is mapped to subcarrier 6 of the 14th OFDM symbol of each RB; for each CSI-RS configuration transmitted subframe, the base station maps the CSI-RS to the physical resource block in the above manner Up, sent out through the antenna port.
  • the CSI-RS of each of the antenna ports 2 to 7 is separated by 12 subcarriers.
  • Embodiment 8 As shown in FIG. 9, the base station sets the antenna port 0 to use the common pilot specified in LTE as the CSI-RS, and the CSI-RSs of other antenna ports are mapped as follows:
  • the CSI-RS of the antenna port 1, that is, R1 is transmitted once every two RBs, and is mapped to the subcarrier 1 of the ninth OFDM symbol of the first RB;
  • the CSI-RS of the antenna port 2 that is, R2, is transmitted once every 2 RBs, and is mapped to the subcarrier 4 of the ninth OFDM symbol of the first RB;
  • the CSI-RS of antenna port 3, that is, R3, is transmitted once every 2 RBs, and is mapped to the subcarrier 7 of the ninth OFDM symbol of the first RB; 4.
  • CSI-RS of antenna port 4, that is, R4 sent every 2 RBs, mapped to the first
  • the CSI-RS of the antenna port 5, that is, R5 is transmitted once every 2 RBs, and is mapped to the subcarrier 2 of the 11th OFDM symbol of the second RB;
  • the CSI-RS of the antenna port 6, that is, R6, is transmitted once every 2 RBs, and is mapped to the subcarrier 6 of the 11th OFDM symbol of the second RB; 7.
  • CSI-RS of the antenna port 7, that is, R7 sent every 2 RBs, mapped to the second
  • the base station On the subcarrier 10 of the eleventh OFDM symbol of the RB; for each CSI-RS configuration, the base station transmits the CSI-RS to the physical resource block in the above manner, and transmits it through the antenna port.
  • the CSI-RS of each antenna port in antenna ports 1 ⁇ 7 is separated by 24 subcarriers.
  • the present invention also provides a base station, which is applied to an advanced long-term evolution system, where the base station is configured to: set one or more antenna ports, use a common pilot specified in a long-term evolution system as a channel measurement pilot, and set other The channel measurement pilot of the antenna port avoids the mapping position of the common pilot and the downlink dedicated pilot of the long term evolution system, thereby supporting mapping of channel measurement pilots to physical resource blocks.
  • One or more antenna ports are 1 or 2 antenna ports, and the channel measurement pilots of the other antenna ports are set to be set as follows: Channel measurement pilots of other antenna ports are distributed in the 6th or 9th or 11th of the physical resource block. Or 14 orthogonal frequency division multiplexing symbols; or
  • One or more antenna ports are 4 antenna ports.
  • the channel measurement pilots of the other antenna ports are set to be set as follows: The channel measurement pilots of the other antenna ports are distributed on the 6th or 11th or 14th orthogonal frequency division multiplexing symbols of the physical resource block.
  • the channel measurement pilots of the other antenna ports are set to be set as follows: the channel measurement pilots of the other antenna ports have a frequency domain start position on the orthogonal frequency division multiplexing symbols in the physical resource block.
  • the channel measurement pilots of the other antenna ports are set to be set as follows: the number of subcarriers separated by the channel measurement pilots of the same antenna port in the other antenna ports is a multiple of 12 or a multiple of 12; or
  • the channel measurement pilots of the other antenna ports are set as follows: the number of subcarriers separated by channel measurement pilots of the same antenna port in the other antenna ports is 6, 12 or 24; or channel measurement guides of other antenna ports are set.
  • the frequency is set to: in the other antenna ports, the channel measurement pilot of one antenna port is located in one orthogonal frequency division multiplexing symbol in the physical resource block, or is located in multiple orthogonal frequency division multiplexing symbols.
  • the base station of the present invention uses all or part of the common pilot as a partial CSI-RS, and does not need to retransmit the channel measurement pilot at the common pilot transmission antenna port, thereby greatly saving pilot overhead; and because the LTE physical layer standard is not Defining CSI-RS, the LTE user cannot identify the CSI-RS sent on the physical resource block, and the LTE user will use the CSI-RS as the wrong symbol in the received data; in the present invention, the newly added CSI-RS is in each The RBs are sparsely distributed, and the performance degradation of LTE is small.
  • the number of subcarriers separated by CSI-RS for each antenna port is a divisor or multiple of 12 subcarriers per RB.
  • the CSI-RS can be evenly distributed over the entire bandwidth.
  • the CSI-RS of the newly added antenna port can be uniformly transmitted at different antenna ports, which is beneficial for reducing the degradation of the LTE system; and can obtain the channel quality indication information on the full bandwidth; Destroying the original common pilot pattern has less impact on the 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 porte sur un procédé de mappage qui est appliqué dans un système d'évolution à long terme avancée (LTE-A). Le procédé comprend les étapes suivantes : une station de base règle un ou plusieurs ports d'antenne pour utiliser le pilote commun prescrit dans le système LTE en tant que signal de référence d'informations d'état de canal (CSI-RS), et règle le CSI-RS des autres ports d'antenne, afin qu'il reste éloigné des positions de mappage du pilote commun et du pilote spécifique de liaison descendante du LTE. De façon correspondante, la présente invention porte également sur une station de base. La présente invention peut permettre d'économiser un temps inactif de système et a peu d'impact sur un fonctionnement de système LTE pour les utilisateurs.
PCT/CN2010/071930 2009-04-20 2010-04-20 Procédé de mappage et station de base associée WO2010121541A1 (fr)

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CN103138869B (zh) * 2011-11-22 2015-08-19 中国移动通信集团公司 信道状态信息参考信号的发送方法、基站及中继
CN103944847B (zh) * 2013-01-18 2019-06-18 中兴通讯股份有限公司 导频符号承载及处理方法、装置
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"3GPP TS 36.211 V850, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation(Release 8)", 3GPP TECHNICAL SPECIFICATION GROUP RADIO ACCESS NETWORK., December 2008 (2008-12-01), pages 64 - 71, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Specs/archive/36_series/36.211/36211-850.zip> *

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