WO2011160473A1 - Procédé et appareil permettant de transmettre une onde pilote de mesure de canal - Google Patents

Procédé et appareil permettant de transmettre une onde pilote de mesure de canal Download PDF

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Publication number
WO2011160473A1
WO2011160473A1 PCT/CN2011/071774 CN2011071774W WO2011160473A1 WO 2011160473 A1 WO2011160473 A1 WO 2011160473A1 CN 2011071774 W CN2011071774 W CN 2011071774W WO 2011160473 A1 WO2011160473 A1 WO 2011160473A1
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WIPO (PCT)
Prior art keywords
cell
time
frequency
channel measurement
measurement pilot
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PCT/CN2011/071774
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English (en)
Chinese (zh)
Inventor
姜静
张文峰
孙云锋
张晨晨
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中兴通讯股份有限公司
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Publication of WO2011160473A1 publication Critical patent/WO2011160473A1/fr

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    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code

Definitions

  • the present invention relates to the field of communications, and in particular, to a channel measurement pilot transmission method and apparatus ( background technology)
  • LTE-Advance Long-Term Evolution Advance
  • International Mobile Telecommunication Advance International Mobile Telecommunication Advance
  • CoMP 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 ms and includes 10 sub-frames of length 1 ms. .
  • CP Cyclic Prefix
  • each subframe can contain 12 or 14 OFDM symbols.
  • resources are divided into sub-carriers.
  • the smallest unit of resource allocation is Resource Block (RB), and one physical resource block corresponding to physical resources (Physical RB) , referred to as PRB).
  • RB Resource Block
  • PRB Physical resource block corresponding to physical resources
  • CSI-RS channel measurement pilot
  • DMRS Demodulation Reference Signal
  • the technical problem to be solved by the present invention is to provide a channel measurement pilot transmission method and apparatus.
  • the present invention provides a channel measurement pilot transmission method, including:
  • the M cells form a set of channel measurement pilot orthogonal cells, and the time-frequency resources of any one of the cells in the group that transmit the channel measurement pilots are orthogonal to the time-frequency resource positions of the other cells in the group that transmit the channel measurement pilots;
  • the channel measurement pilot is transmitted by avoiding the time-frequency resource occupied by the downlink dedicated pilot of the cell.
  • the channel measurement pilot of the local cell determining an index of the channel measurement pilot map according to the cell identifier (Cell ID) of the cell, and then using the time-frequency resource corresponding to the index as the sending the cell.
  • Cell ID cell identifier
  • the predetermined time-frequency resource is used as the initial time-frequency resource used by the transmission channel measurement pilot, and then determined according to the cell identifier (Cell ID) of the cell.
  • Cell ID cell identifier
  • the bit index according to the time-frequency shift amount corresponding to the shift index, performs cyclic shift (Vshift) processing on the initial time-frequency resource, and uses the cyclically shifted time-frequency resource as a channel measurement guide for transmitting the cell. Time-frequency resources used by the frequency.
  • the initial time-frequency resource used determines whether the initial time-frequency resource of the cell needs to be adjusted, and if adjustment is needed, the initial time-frequency of the cell is used.
  • the resource is cyclically shifted (Vshift) in the frequency domain, and the cyclically shifted time-frequency resource is used as the time-frequency resource for transmitting the channel measurement pilot of the cell. If no adjustment is needed, the cell is The initial time-frequency resource is used as a time-frequency resource for transmitting the channel measurement pilot of the cell.
  • the step of determining an index of the channel measurement pilot mapping according to the cell identifier (Cell ID) of the cell comprises: determining channel measurement of the any cell according to the value of the cell identifier (cell ID) modulo M The index of the pilot map.
  • the step of determining a shift index according to a cell identifier (Cell ID) of the cell includes: determining a shift index of the any cell according to a value obtained by modulo M of the cell identifier; where the M is 3 multiple.
  • the initial time-frequency resource is: 5th, 6th symbols in the time domain, and 3rd, 4th, 8th, and 9th subcarriers in the frequency domain;
  • the shift index has three, corresponding to three time-frequency shifts respectively. a bit quantity, where the first time shift shift corresponding to the first shift index is: zero; the second time shift shift corresponding to the second shift index is: time domain shifted by 4 symbols, before frequency domain Shifting 3 subcarriers; the third time shift shift corresponding to the third shift index is: 4 symbols are shifted back in the time domain, and 1 subcarrier is forwarded in the frequency domain.
  • the three cells are in a group
  • the base station sends the time-frequency resource of the channel measurement pilot to one cell in the group
  • the time-frequency resource position of the channel measurement pilot transmitted by the base station to the other two cells in the group is positive.
  • the time-frequency resource of the first cell is: the 5th, 6th symbols in the time domain, and the 3rd, 4th, 8th, and 9th subcarriers in the frequency domain
  • the time-frequency resources of the second cell are: 2nd and 3rd symbols in the time domain, 2nd, 3rd, 10th, and 11th subcarriers in the frequency domain
  • time-frequency resources of the third cell are: 2nd and 3rd symbols in the time domain, and 0th in the frequency domain 1, 7, 7, 8 subcarriers.
  • the three cells are in a group
  • the base station sends the time-frequency resource of the channel measurement pilot to one cell in the group
  • the time-frequency resource position of the channel measurement pilot transmitted by the base station to the other two cells in the group is positive.
  • the time-frequency resource of the first cell is: a third symbol in the time domain, and the first, second, third, fifth, sixth, seventh, and ten subcarriers in the frequency domain;
  • the time-frequency resources are: the second symbol in the time domain, and the second, third, fourth, sixth, seventh, eighth, and eleventh subcarriers in the frequency domain;
  • the time-frequency resources of the third cell are: The third symbol, the 0th, 3rd, 4th, 5th, 7th, 8th, 9th, and 11th subcarriers in the frequency domain.
  • the six cells measure pilot orthogonal cells for a group of channels
  • the base station sends time-frequency resources of channel measurement pilots to one cell, and time-frequency of channel measurement pilots sent by the base station to other cells in the group.
  • the resource location is orthogonal, where: the time-frequency resource of the first cell is: a third symbol in the time domain, and the first, second, third, fifth, sixth, seventh, tenth, and ten subcarriers in the frequency domain;
  • the time-frequency resource of the second cell is: the second symbol in the time domain, and the second, third, fourth, sixth, eighth, eighth, and eleventh subcarriers in the frequency domain;
  • the time-frequency resource of the third cell is: The third symbol in the time domain, the 0th, 3rd, 4th, 5th, 7th, 8th, 9th, and 11th subcarriers in the frequency domain;
  • the time-frequency resource of the fourth cell is: the 5th and 6th symbols in the time domain , the second, third, eighth
  • the present invention further provides a channel measurement pilot transmitting apparatus, including: a grouping unit and a transmitting unit, wherein:
  • the grouping unit is configured to: group the M cells into a set of channel measurement pilot orthogonal cells, and any cell in the group sends the time-frequency resource of the channel measurement pilot and the time-frequency of the channel measurement pilot of other cells in the group. Resource location is orthogonal;
  • the sending unit is configured to: send, for any cell in the group, a channel measurement pilot that avoids the time-frequency resource occupied by the downlink dedicated pilot of the local cell.
  • the device further includes a resource allocation unit, where the resource allocation unit is configured to: determine an index of the channel measurement pilot map according to a cell identifier (Cell ID) of any cell in advance, and then use the time-frequency resource corresponding to the index as The time-frequency resource used by the cell to transmit the channel measurement pilot is notified to the transmitting unit.
  • Cell ID cell identifier
  • the device further includes a resource allocation unit, where the resource allocation unit is configured to: before the sending unit sends the channel measurement pilot to the any cell, first use the predetermined time-frequency resource as the channel measurement pilot.
  • the initial time-frequency resource is used, and then the shift index is determined according to the cell identifier (Cell ID) of the cell, and the initial time-frequency resource is cyclically shifted according to the time-frequency shift amount corresponding to the shift index (
  • the Vshift process is to notify the transmitting unit of the cyclically shifted time-frequency resource as a time-frequency resource used for transmitting the channel measurement pilot of the cell.
  • the device further includes a resource allocation unit, where the resource allocation unit is configured to: determine an index of a channel measurement pilot map according to a cell identifier (Cell ID) of the cell, and then send the time-frequency resource corresponding to the index as a sending
  • Cell ID cell identifier
  • the initial time-frequency resource used by the channel measurement pilot is determined according to the location of the downlink dedicated pilot (URS) of the cell, and the initial time-frequency resource of the cell needs to be adjusted. If adjustment is needed, the cell is used.
  • URS downlink dedicated pilot
  • the initial time-frequency resource is cyclically shifted (Vshift) in the frequency domain, and the cyclically shifted time-frequency resource is used as the time-frequency resource for transmitting the channel measurement pilot of the cell, and if no adjustment is needed,
  • the initial time-frequency resource of the cell is notified to the sending unit as a time-frequency resource used for transmitting a channel measurement pilot of the cell.
  • the invention not only ensures that the CSI-RS patterns in a group of cells are orthogonal, satisfies the measurement requirements of the CoMP, but also avoids the URS (downlink dedicated pilot) of the antenna port 5, and does not affect the performance of the mobile terminal of the Release 8.
  • Figure 1 is a dedicated downlink pilot pattern for a cell
  • 2 is a channel measurement pilot pattern according to a first embodiment of the present invention
  • 3 is a channel measurement pilot pattern according to a second embodiment of the present invention.
  • FIG. 5 is a channel measurement pilot pattern according to a fourth embodiment of the present invention.
  • Figure 6a is a schematic diagram of a channel measurement pilot orthogonal cell 1;
  • Figure 6b is a schematic diagram 2 of a channel measurement pilot orthogonal cell. Preferred embodiment of the invention
  • M cells are grouped into a set of channel measurement pilot orthogonal cells, and any cell in the group transmits time-frequency resources of channel measurement pilots and other cells in the group transmit channel measurement pilots.
  • the time-frequency resource is orthogonal to the location; for any cell in the group, the channel measurement pilot is transmitted by avoiding the time-frequency resource occupied by the downlink dedicated pilot of the current cell.
  • Method 1 Before transmitting the channel measurement pilot of the local cell, determining an index of the channel measurement pilot mapping according to the cell identifier (Cell ID) of the cell, that is, an index of a pattern of the channel measurement pilot mapping, which may be referred to as An index of the channel measurement pilot map, or a pattern index called a channel measurement pilot, and then using the time-frequency resource corresponding to the index as the channel measurement pilot station that sends the cell Time-frequency resources used.
  • Cell ID cell identifier
  • the determining the resource index according to the cell identifier (Cell ID) of the any cell includes: determining a resource index of the any cell according to the value of the cell identifier (cell ID).
  • Method 2 Before transmitting the channel measurement pilot of the local cell, first use the predetermined time-frequency resource as the initial time-frequency resource used for transmitting the channel measurement pilot, and then determine according to the cell identifier (Cell ID) of the cell.
  • the shift index is subjected to cyclic shift (Vshift) processing on the initial time-frequency resource according to the time-frequency shift amount corresponding to the shift index, and the cyclically shifted time-frequency resource is used as the channel measurement for transmitting the cell.
  • Vshift cyclic shift
  • the determining the shift index according to the cell identifier (Cell ID) of the any cell includes: determining a shift index of the any cell according to the value of the cell identifier modulo M.
  • said M is a multiple of three.
  • the initial time-frequency resources are: 5th and 6th symbols in the time domain, and 3rd, 4th, 8th, and 9th subcarriers in the frequency domain
  • the shift index has three, corresponding to three time-frequency shift amounts, wherein, The first time-frequency shift amount corresponding to a shift index is: zero; the second time-frequency shift amount corresponding to the second shift index is: 4 symbols are shifted back in the time domain, and 3 subcarriers are forwarded in the frequency domain; The third time-frequency shift amount corresponding to the three-shift index is: 4 symbols are shifted back in the time domain, and 1 sub-carrier is forwarded in the frequency domain.
  • Method 3 Before transmitting the channel measurement pilot of the local cell, determine an index of the channel measurement pilot map according to the cell identifier (Cell ID) of the cell, and then use the time-frequency resource corresponding to the index as the channel measurement guide.
  • the initial time-frequency resource used by the frequency determines whether the initial time-frequency resource of the cell needs to be adjusted according to the location of the downlink dedicated pilot (UTS) of the cell, and if the adjustment needs to be performed, the initial time of the cell is used.
  • the frequency resource is cyclically shifted (Vshift) in the frequency domain, and the cyclically shifted time-frequency resource is used as the time-frequency resource for transmitting the channel measurement pilot of the cell. If no adjustment is needed, the cell is used.
  • the initial time-frequency resource is used as a time-frequency resource for transmitting the channel measurement pilot of the cell.
  • the time-frequency shift amount and the corresponding index are determined in advance, and then the shift index is determined according to the cell identifier (Cell ID) of the any cell, and then corresponding to the shift index according to the shift index.
  • the time-frequency shift amount is cyclically shifted (Vshift) to the initial time-frequency resource.
  • the channel measurement pilot of any cell occupies 8 REs in the frequency domain, and each Each RE corresponds to any one of the antenna ports.
  • Allocating frequency domain resources according to the modulo index can ensure that the channel measurement pilot patterns between a group of cells are orthogonal (that is, occupy different positions on time-frequency resources), so as to ensure that the mobile terminal can measure any one of the groups of cells.
  • the channel information of the cell to support the channel information required by CoMP (Multipoint Cooperative Transmission).
  • Performing a Vshift process on the initial transmission position ensures that the channel measurement pilot in the cell does not collide with the URS (downlink dedicated pilot) of the same cell, and does not affect the orthogonality of the pattern of the cell and other cells on the other hand.
  • the cell IDs after cell ID modulo M shift are orthogonal.
  • the apparatus for implementing the above method includes: a grouping unit and a sending unit, wherein:
  • a grouping unit configured to group the M cells into a set of channel measurement pilot orthogonal cells, where any cell in the group sends the time-frequency resource of the channel measurement pilot and the time-frequency of the channel measurement pilot of other cells in the group Resource location is orthogonal;
  • a sending unit configured to send a channel measurement pilot to the time-frequency resource occupied by the downlink dedicated pilot of the local cell to any cell in the group.
  • the apparatus further includes a resource allocation unit, configured to determine an index of a channel measurement pilot map according to a cell identifier (Cell ID) of any cell in advance, and then use the time-frequency resource corresponding to the index as The time-frequency resource used by the cell to transmit the channel measurement pilot is notified to the transmitting unit.
  • a resource allocation unit configured to determine an index of a channel measurement pilot map according to a cell identifier (Cell ID) of any cell in advance, and then use the time-frequency resource corresponding to the index as The time-frequency resource used by the cell to transmit the channel measurement pilot is notified to the transmitting unit.
  • the device further includes a resource allocation unit, configured to send the predetermined time-frequency resource as the channel measurement pilot before sending, by the sending unit, the channel measurement pilot to the any cell.
  • the initial time-frequency resource is used, and then the shift index is determined according to the cell identifier (Cell ID) of the cell, and the initial time-frequency resource is cyclically shifted according to the time-frequency shift amount corresponding to the shift index (
  • Cell ID cell identifier
  • the Vshift process is to notify the transmitting unit of the cyclically shifted time-frequency resource as a time-frequency resource used for transmitting the channel measurement pilot of the cell.
  • the device further includes a resource allocation unit, configured to determine an index of a channel measurement pilot map according to a cell identifier (Cell ID) of the cell, and then send the time-frequency resource corresponding to the index as a sending
  • Cell ID cell identifier
  • the location of the downlink dedicated pilot (URS) determines whether the initial time-frequency resource of the cell needs to be adjusted. If adjustment is needed, the initial time-frequency resource of the cell is cyclically shifted in the frequency domain (Vshift).
  • the cell channel measurement pilots with the same residual value are mapped according to the same frequency domain resource.
  • the CSI-RS pattern is mapped according to the pattern 1 in Figure 2, and the 5th and 6th symbols on the real-time domain (1 in the figure)
  • the 3rd, 4th, 8th, and 9th subcarriers in the frequency domain are the channel measurement pilot transmission locations of the cell; 4, the cell ID of one cell is modulo 3 and then 1, then the CSI-RS pattern is according to FIG.
  • the 2nd and 3rd symbols in the real-time domain, the 2nd, 3rd, 10th, and 11th subcarriers in the frequency domain are the pilot measurement pilot positions of the channel of the cell; assuming that the cell ID of a cell is modulo 3 2, the pattern of the CSI-RS is mapped according to the pattern 3 in FIG. 2, the 2nd and 3rd symbols in the real-time domain, and the 0th, 1st, 7th, and 8th subcarriers in the frequency domain are channel measurement pilots of the cell. Launch location.
  • the thus mapped CSI-RS pattern can ensure that the patterns of a group of cells are time-frequency orthogonal. As shown in FIG.
  • the cells 1, 2, and 3 are a set of channel measurement pilot orthogonal cells.
  • the above arrangement may also be arbitrarily transformed.
  • the Cell ID of the cell is modulo 3 and is 0, and the CSI-RS is mapped according to the pattern 2;
  • the Cell lD of the cell is modulo 3 and the CSI-RS is mapped according to the pattern 3;
  • the Cell ID is modulo 2 after modulo 3, and its CSI-RS is mapped according to pattern 1.
  • This article is no longer a description. As long as the Cell ID is modulo 3, the cells with different residual values can use different mapping methods.
  • the CSI-RS pattern of each cell avoids the URS of the antenna port 5 of the local cell, and the channel measurement pilots of the three cells ensure that the time-frequency resources are orthogonal. In this embodiment, it is not necessary to perform Vshift processing on the CSI-RS pattern of each cell.
  • each pattern corresponds to 8 REs, and each RE corresponds to one antenna port, and the resource elements (Resources Elements, RE) corresponding to each antenna port in each pattern can be flexibly adjusted, that is, each The antenna port corresponds to the RE.
  • the subcarrier is a CDM pair.
  • Subacarrier - 1, symbol + 4 if mod ( celllD , 3) 2
  • the initial time-frequency resource is cyclically shifted (Vshift), and will be cyclically shifted.
  • the time-frequency resource is used as the transmission position of the channel measurement pilot of the any cell.
  • the Cell ID modulo 3 is equal to 0
  • the CSI-RS is mapped according to the initial pattern.
  • the 5th, 6th symbols in the real-time domain, the 3rd, 4th, 8th, and 9th subcarriers in the frequency domain are the channel measurement pilot transmission positions of the cell; when the Cell ID modulo 3 is equal to 1, the CSI-RS will be the initial pattern.
  • the CSI-RS shifts the initial pattern by 4 symbols, moves one subcarrier forward to map, the 2nd and 3rd symbols on the real-time domain, and the 0th, 1st, 7th, and 8th sub-bands in the frequency domain.
  • the carrier is the channel measurement pilot transmission location for the cell.
  • the same cell channel measurement pilots of Vshift are mapped according to the same frequency domain resources.
  • the thus mapped CSI-RS pattern can ensure that the patterns of a group of cells are time-frequency orthogonal. As shown in FIG. 6a, the cells 1, 2, and 3 are a set of channel measurement pilot orthogonal cells.
  • the CSI-RS pattern of each cell avoids the URS of the antenna port 5 of the local cell, and the channel measurement pilots of the three cells ensure that the time-frequency resources are orthogonal.
  • the RE corresponding to each antenna port in each pattern can be flexibly adjusted.
  • CDM Code Division Multiplexing
  • the initial position of the CSI-RS may be any one of the three mapping patterns in FIG. 3. After the initial pattern is determined, the corresponding shift can still be determined according to the Cell ID, but only the position of the shift. Also adjust accordingly.
  • the cell channel measurement pilots with the same residual value are mapped according to the same frequency domain resource.
  • the pattern of the CSI-RS is mapped according to the pattern 1 in FIG. 4, the third symbol on the real-time domain, and the first and second in the frequency domain.
  • 3, 5, 6, 7, 9, 10 subcarriers are the channel measurement pilot transmission positions of the cell; 4, if one cell's Cell lD is modulo 3 and then 1, then the CSI-RS pattern is mapped according to the pattern 2 in FIG.
  • the second symbol on the real-time domain, the second, third, fourth, sixth, eighth, tenth, tenth, and eleventh subcarriers in the frequency domain are the pilot transmission locations of the channel of the cell; H is not taken by the cell ID of one cell.
  • the pattern of its CSI-RS is mapped according to the pattern 3 in Figure 4, the third symbol on the real-time domain, and the 0, 3, 4, 5, 7, 8, 9, 11 subcarriers in the frequency domain.
  • a pilot transmission location is measured for the channel of the cell.
  • the thus mapped CSI-RS pattern not only ensures that the time-frequency of the patterns between a group of cells is orthogonal, as shown in FIG. 6a, the cells 1, 2, and 3 are a set of channel measurement pilot orthogonal cells.
  • the CSI-Rs pattern of each cell can also avoid the URS of the antenna port 5 of the local cell.
  • the RE corresponding to each antenna port in each pattern can be flexibly adjusted.
  • Pattern index mod ( cell!D,6):
  • the cell channel measurement pilots with the same residual value are mapped according to the same frequency domain resource.
  • the CSI-RS pattern is mapped according to the pattern 1 in FIG. 5, and the third symbol on the real-time domain, the first and second in the frequency domain.
  • 5, 6, 7, 9, 10 subcarriers are the channel measurement pilot transmission locations of the cell; 4 the cell lD of one cell is modulo 6 and then 1, then the CSI-RS pattern is according to Figure 5.
  • the pattern 2 in the map, the second symbol on the real-time domain, the 2nd, 3rd, 4th, 6th, 7th, 8th, 10th, and 11th subcarriers in the frequency domain are the letters of the cell
  • the channel measurement pilot transmission position; H does not have a cell's Cell ID modulo 6 is 2, then its CSI-RS pattern is mapped according to the pattern 3 in Figure 5, the third symbol on the real-time domain, the 0th in the frequency domain 3, 4, 5, 7, 8, 9, 11 subcarriers are the channel measurement pilot transmission locations of the cell; 4, the cell ID of one cell is modulo 6 and then 3, then the CSI-RS pattern is followed.
  • the pattern 4 in Figure 5 is mapped, the 5th and 6th symbols in the real-time domain, and the 2nd, 3rd, 8th, and 9th subcarriers in the frequency domain are the channel measurement pilot transmission positions of the cell; suppose the Cell ID of a cell is modulo 6 is 4, then the CSI-RS pattern is mapped according to the pattern 5 in Figure 5, the first symbol on the real-time domain, and the first, second, third, fifth, sixth, seventh, ninth, and ten subcarriers in the frequency domain.
  • the pilot transmission position is measured for the channel of the cell; 4, the Cell ID of one cell is modulo 6 and then 5, and the pattern of the CSI-RS is mapped according to the pattern 6 in FIG.
  • the 2nd, 3rd, 7th, and 8th subcarriers in the frequency domain are pilot measurement pilot transmission locations of the cell.
  • the thus mapped CSI-RS pattern can not only ensure that the time-frequency of the patterns between a group of cells is orthogonal, as shown in FIG. 6b, the cells 1 , 2, 3 , 14, 17, 18 are a set of channel measurement pilot orthogonal cells.
  • the CSI-Rs pattern of each cell can also avoid the URS of the antenna port 5 of the local cell.
  • the RE corresponding to each antenna port in each pattern can be flexibly adjusted.
  • the pattern on the 6th and 7th symbols and the pattern on the 13th and 14th symbols are adjacent to each other.
  • CDM-T code division multiplexing + time division multiplexing, that is, code division multiplexing between a group of antenna ports, time division multiplexing between different groups of antenna ports
  • CDM-F code division multiplexing + frequency division multiplexing
  • the present invention maintains the URS 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 CSI-RS time-frequency orthogonal between a group of cells is guaranteed to facilitate channel measurement of CoMP.
  • the above three embodiments may implement orthogonality of inter-cell CSI-RS according to one subframe, or implement time-frequency orthogonality of CSI-RS patterns of 3K cells by using K subframes.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be executed by a computing device The program code is implemented so that they can be stored in the storage device by the computing device, or they can be separately fabricated into individual integrated circuit modules, or a plurality of modules or steps can be made into a single integrated circuit module. .
  • the invention is not limited to any specific combination of hardware and software.
  • the CSI-RS patterns in a group of cells are orthogonalized, the CoMP measurement requirements are met, and the URS (downlink dedicated pilot) of the antenna port 5 can be avoided, and the movement of the Release 8 is not affected. Terminal performance.

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Abstract

Un procédé permettant de transmettre une onde pilote de mesure de canal est fourni dans la présente invention. Le procédé inclut les étapes suivantes : M cellules constituent un groupe de cellules orthogonales d'onde pilote de mesure de canal, l'emplacement des ressources de fréquence de temps destinées à transmettre l'onde pilote de mesure de canal par une cellule quelconque du groupe étant orthogonal par rapport à l'emplacement des ressources de fréquence de temps destinées à transmettre l'onde pilote de mesure de canal par d'autres cellules du groupe; pour une cellule quelconque du groupe, l'onde pilote de mesure de canal est transmise en évitant les ressources de fréquence de temps occupées par une onde pilote spécifique de liaison descendante de la présente cellule. L'appareil correspondant est également décrit dans la présente invention. La présente invention non seulement assure l'orthogonalité de la configuration d'une onde pilote de mesure de canal dans un groupe de cellules et répond à l'exigence de mesure de transmission CoMP (multipoint coordonnée), mais elle évite aussi l'onde pilote spécifique de liaison descendante du port d'antenne 5.
PCT/CN2011/071774 2010-06-21 2011-03-14 Procédé et appareil permettant de transmettre une onde pilote de mesure de canal WO2011160473A1 (fr)

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CN103796215B (zh) * 2012-11-02 2017-05-24 普天信息技术研究院有限公司 一种专网通信系统中发送下行导频的方法
CN103795515A (zh) * 2012-11-02 2014-05-14 普天信息技术研究院有限公司 一种专网通信系统中发送下行导频的方法
CN103841071A (zh) * 2012-11-22 2014-06-04 普天信息技术研究院有限公司 一种无线通信系统中信道估计的方法
CN105790904B (zh) * 2014-12-16 2019-06-21 北京信威通信技术股份有限公司 一种复用相同导频资源的最大天线端口数量的扩展方法
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