WO2017166114A1 - Procédés et appareils de transmission - Google Patents

Procédés et appareils de transmission Download PDF

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Publication number
WO2017166114A1
WO2017166114A1 PCT/CN2016/077841 CN2016077841W WO2017166114A1 WO 2017166114 A1 WO2017166114 A1 WO 2017166114A1 CN 2016077841 W CN2016077841 W CN 2016077841W WO 2017166114 A1 WO2017166114 A1 WO 2017166114A1
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WIPO (PCT)
Prior art keywords
group
array
sub
resource
resources
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PCT/CN2016/077841
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English (en)
Inventor
Chuangxin JIANG
Yukai GAO
Gang Wang
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Nec Corporation
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Priority to PCT/CN2016/077841 priority Critical patent/WO2017166114A1/fr
Publication of WO2017166114A1 publication Critical patent/WO2017166114A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • H04B7/0479—Special codebook structures directed to feedback optimisation for multi-dimensional arrays, e.g. horizontal or vertical pre-distortion matrix index [PMI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • 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

Definitions

  • Embodiments of the present disclosure generally relate to wireless communication techniques and more particularly relate to a method and apparatus for transmitting reference signals.
  • Multi-antenna techniques can significantly increase data rates and reliability of a wireless communication system.
  • the performance can be in particular improved if both the transmitter and the receiver are equipped with multiple antennas, which results in a multiple-input multiple-output (MIMO) communication channel.
  • MIMO multiple-input multiple-output
  • Such systems and/or related techniques are commonly referred to as MIMO.
  • LTE Long Term Evolution
  • a core component in LTE is support of MIMO antenna deployments and MIMO related techniques.
  • one-dimensional (horizontal) antenna array can provide flexible beam adaption in the azimuth domain only through the horizontal precoding process, while fixed down-tilt is applied in the vertical direction.
  • FD-MIMO full dimensional MIMO
  • CSI-RS Channel State Information Reference Signals
  • Fig. 1 illustrates the CSI-RS pattern for 16-port CSI-RS RE mapping for CDM-4, wherein a CDM group comprises 4 RE and two CDM group forms 8 REs for mapping a legacy 8-port CSI-RS as illustrated by bold line blocks in Fig. 1.
  • 12-port CSI-RS-RE for CDM-4
  • CSI-RS ports OCC indices RE locations 15, 16, 17, 18 0, 1, 2, 3 4 REs corresponding to the 1st resource 19, 20, 21, 22 0, 1, 2, 3 4 REs corresponding to the 2nd resource 23, 24, 25, 26 0, 1, 2, 3 4 REs corresponding to the 3rd resource 27, 28, 29, 30 0, 1, 2, 3 4 REs corresponding to the 4th resource
  • Fig. 2 illustrates the CSI-RS pattern for 12-port CSI-RS RE mapping for CDM-4, wherein a CDM group comprises 4 REs but these 4 REs are two separate groups of REs as illustrated by bold line blocks in Fig. 2.
  • Fig. 3 illustrate the sequence W p’ (i) for CDM-4, which is an OCC sequence with a length of 4.
  • Class A CSI-RS resource port numbers used for the k-th component resources with Rel-12 port number p are given as follows:
  • Fig. 4 illustrates CSI-RS pattern for 16-port CSI-RS RE mapping for CDM-2, which comprises two 8-port configurations.
  • the CSI-RS ports include frame structure types 1 and 2 each comprising 8 CSI-RS ports.
  • the first 8 CSI-RS ports i.e. ports 15-22
  • the second 8 CSI-RS ports i.e. ports 23-30
  • an antenna array for transmitting the reference signals is divided to at least a first sub-array and a second sub-array, and the method comprises: transmitting the reference signals using a first group of configuration resources within a first transmission resource group; and transmitting the reference signals using a second group of configuration resources within a second transmission resource group.
  • an apparatus for transmitting reference signals is divided to at least a first sub-array and a second sub-array, and the apparatus comprises: a group resource mapping unit, a first reference signal transmitting unit and a second reference signal transmitting unit.
  • the group resource mapping unit is configured to map the first sub-array and the second sub-array to a first group of configuration resources within a first transmission resource group and a second group of configuration resources within a second transmission resource group respectively; the first reference signal transmitting unit is configured to transmit the reference signals using the first sub-array within the first transmission resource group; and the second reference signal transmitting unit is configured to transmit the reference signals using the second sub-array within the first transmission resource group.
  • a computer-readable storage media with computer program code embodied thereon, the computer program code configured to, when executed, cause an apparatus to perform actions in the method according to any embodiment in the first aspect.
  • a computer program product comprising a computer-readable storage media according to the third aspect.
  • a plurality of transmission resource groups can be combined to support more ports for the reference signals and the antennae can be divided into different sub-arrays which are mapped onto the plurality of transmission resource groups.
  • legacy UE it can use the sub-array separately to transmit the reference signals and thus no modifications are required, and thus impact on the legacy UE can be reduced substantially.
  • new UE it can uses both the sub-array to transmit the reference signals and it can reuse the legacy signaling mechanisms, which means the RRC signal overhead, and standard complexity can be reduced as well.
  • Fig. 1 illustrates the CSI-RS pattern for 16-port CSI-RS RE mapping for CDM-4 in 36.211 d00 of Rel. 13 Agreements in RAN1 #84;
  • Fig. 2 illustrates the CSI-RS pattern for 12-port CSI-RS RE mapping for CDM-4 in 36.211 d00 of Rel. 13 Agreements in RAN1 #84;
  • Fig. 3 illustrate the sequence wp’ (i) for CDM-4 in 36.211 d00 of Rel. 13 Agreements in RAN1 #84;
  • Fig. 4 illustrates CSI-RS pattern for 16-port CSI-RS RE mapping for CDM-2 in 36.211 d00 of Rel. 13 Agreements in RAN1 #84;
  • Fig. 5A schematically illustrates a flow chart of a method for transmitting reference signals according to an embodiment of the present disclosure
  • Fig. 5B schematically illustrates another flow chart of a method for transmitting reference signals according to another embodiment of the present disclosure
  • Fig. 6 schematically illustrates a CSI-RS port resource allocation scheme for 28 or 32 CSI-RS ports in FDM mode in accordance with embodiments of the present disclosure
  • Fig. 7 schematically illustrates a CSI-RS port resource allocation scheme for 20 or 24 CSI-RS ports in FDM mode in accordance with embodiments of the present disclosure
  • Fig. 8 illustrates another CSI-RS port resource allocation scheme for 28 CSI-RS ports in FDM mode in accordance with embodiments of the present disclosure
  • Fig. 9 illustrates a further CSI-RS port resource allocation scheme for 28 CSI-RS ports in FDM mode in accordance with embodiments of the present disclosure
  • Fig. 10 illustrates a still further CSI-RS port resource allocation scheme for 28 CSI-RS ports in FDM mode in accordance with embodiments of the present disclosure
  • Fig. 11 illustrates another CSI-RS port resource allocation scheme for 20 CSI-RS ports in accordance with embodiments of the present disclosure
  • Fig. 12 illustrates an example transmission resource group division and CSI-RS port resource allocation schemes in TDM mode in accordance with embodiments of the present disclosure
  • Fig. 13 illustrates another CSI-RS port resource allocation scheme for a 28-port CSI-RS configuration in FDM mode in accordance with embodiments of the present disclosure
  • Fig. 14 illustrates a further CSI-RS port resource allocation scheme for a 28-port CSI-RS configuration in FDM mode in accordance with embodiments of the present disclosure
  • Fig. 15 illustrates a new ZP CSI-RS configuration in accordance with embodiments of the present disclosure
  • Figs. 16 and 17 illustrate different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 18 and 19 illustrate different sub-array mapping for 32 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 20 to 21 illustrate another different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 22 to 23 illustrate further different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 24 to 25 illustrate still further different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 26 to 27 illustrate different sub-array divisions for 28 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 28 to 29 illustrate another different sub-array divisions for 28 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 30 to 31 illustrate further different sub-array divisions for 24 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 32 to 33 illustrate further different sub-array divisions for 24 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 34 to 35 illustrate another different sub-array divisions for 20 CSI-RS ports in accordance with embodiments of the present disclosure
  • Figs. 36 to 37 illustrate further different sub-array divisions for 20 CSI-RS ports in accordance with embodiments of the present disclosure
  • Fig. 38 illustrates an example sub-array group division for 32 CSI-RS ports with CDM-2 in accordance with embodiments of the present disclosure
  • Fig. 39 illustrates an example sub-array group division for 28 CSI-RS ports with CDM-2 in accordance with embodiments of the present disclosure
  • Fig. 40 illustrates an example sub-array group division for 32 CSI-RS ports with CDM-4 in accordance with embodiments of the present disclosure
  • Fig. 41 illustrates an example sub-array group division for 24 CSI-RS ports with CDM-2 in TDM mode in accordance with embodiments of the present disclosure
  • Fig. 42 illustrates sub-array group and sub-array mapping in TDM mode in accordance with embodiments of the present disclosure
  • Fig. 43 schematically illustrates a block diagram of an apparatus 4300 for transmitting reference signals in accordance with one embodiment of the present disclosure
  • Fig. 44 further illustrates a simplified block diagram of an apparatus 4410 that may be embodied as or comprised in UE and an apparatus 4420 that may be embodied as or comprised in a base station in a wireless network as described herein.
  • each block in the flowcharts or blocks may represent a module, a program, or a part of code, which contains one or more executable instructions for performing specified logic functions, and in the present disclosure, a dispensable block is illustrated in a dotted line.
  • these blocks are illustrated in particular sequences for performing the steps of the methods, as a matter of fact, they may not necessarily be performed strictly according to the illustrated sequence. For example, they might be performed in reverse sequence or simultaneously, which is dependent on natures of respective operations.
  • block diagrams and/or each block in the flowcharts and a combination of thereof may be implemented by a dedicated hardware-based system for performing specified functions/operations or by a combination of dedicated hardware and computer instructions.
  • a user equipment may refer to a terminal, a Mobile Terminal (MT) , a Subscriber Station (SS) , a Portable Subscriber Station (PSS) , Mobile Station (MS) , or an Access Terminal (AT) , and some or all of the functions of the UE, the terminal, the MT, the SS, the PSS, the MS, or the AT may be included.
  • MT Mobile Terminal
  • PSS Portable Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • BS may represent, e.g., a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a radio header (RH) , a remote radio head (RRH) , a relay, or a low power node such as a femto, a pico, and so on.
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • RH radio header
  • RRH remote radio head
  • relay or a low power node such as a femto, a pico, and so on.
  • embodiments of the present disclosure are directed to a new solution for reference signal transmission.
  • the solution can be performed between a serving node like eNB and a terminal device like UE, so as to support reference signal transmission with more ports by combining at least two transmission resource groups (for example PRB or PRB pair #n and PRB or PRB pair #n+1 in one subframe in FDM, or subframe #n and subframe #n+1 in TDM) .
  • the antenna array is divided into at least two groups, i.e., a first sub-array and the second sub-array.
  • the first sub-array and the second sub-array are mapped to a first group of configuration resources within a first transmission resource group and a second group of configuration resources within a second transmission resource group respectively.
  • the first sub-array is used to transmit the reference signals within the first transmission group and the second sub-array is used to transmit the reference signals within the second transmission group.
  • reference signals for the UE can be transmitted jointly using the first sub-array and the second sub-array mapped onto configuration resource groups within the first and second transmission resource groups so as to support more ports.
  • the sub-array in at least one of a first sub-array and a second array, can be further divided into a plurality of sub-array groups which can be mapped to different resource configurations in respective transmission resource group.
  • the terminal device may comprise UE, such as a terminal, an MT, an SS, a PSS, an MS, or an AT.
  • the serving node may comprise a BS, such as a node B (NodeB or NB) , or an evolved NodeB (eNodeB or eNB) .
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • CSI-RS will be mainly taken as an example of reference signals as recited herein and in face the present disclosure is not limited thereto.
  • Fig. 5A schematically illustrates a flow chart of a method 500 for transmitting reference signals in accordance with an embodiment of the present disclosure.
  • the method 500 can be performed at a serving node, for example a BS, like a node B (NodeB or NB) ,
  • NodeB or NB node B
  • the method 500 starts from step 501, in which, a first sub-array and a second sub-array of an antenna array are mapped to a first group of configuration resources within a first transmission resource group and a second group of configuration resources within a second transmission resource group respectively.
  • the antenna array for transmitting the reference signals are divided into a first sub-array and a second sub-array.
  • the antennae for transmitting signals are often arranged in a form of array and thus they can be called as an antenna array.
  • the division of the antennae array can be performed by any rules, for example based on rows and/or columns of antennae in the antenna array. Details about the division will be described in details hereinafter with reference to Fig. 16 to 37 by way of examples.
  • the two sub-arrays can be mapped to groups of configuration resources within different transmission resource groups respectively so as to combine transmission resource to support more ports.
  • the transmission resources are divided into at least two groups, i.e., the first group of configuration resources and the second group of configuration resources.
  • the term “transmission resource” used herein means the time-frequency resources for signal transmission.
  • the transmission resources mean Physical Resource Blocks (PRBs)
  • PRBs Physical Resource Blocks
  • TDM Time Division Multiplexing
  • the transmission resources mean specific PRBs in subframes.
  • the PRBs in one subframe can be divided into at least two transmission resource groups, for example, those even-numbered PRBs and those odd-numbered PRBs.
  • One of the first transmission resource group and the second transmission resource group contains odd-numbered PRBs and the other of them contains even-numbered PRBs.
  • the first transmission resource group and the second transmission resource group are in different subframes.
  • not all REs are configured for a predetermined reference signal transmission, some REs are used to transmit data, some REs are used to transmit control information, some REs are used to transmit Common Reference Signal (CRS) , some REs are used to transmit Demodulation Reference signal (DMRS) and some RES are used to transmit CSI-RS signals.
  • CRS Common Reference Signal
  • DMRS Demodulation Reference signal
  • RES are used to transmit CSI-RS signals.
  • the reference signal is CSI-RS
  • those REs for CSI-RS within a transmission resource group are called a group of configuration resources.
  • PRB or PRB pair in this embodiment means one Physical Resource Block in one subframe.
  • the first sub-array can be mapped to the first group of configuration resources within the first transmission resource group and the second sub-array can be mapped to the second group of configuration resources within the second transmission resource group.
  • the reference signals are transmitted using the first sub-array within the first transmission resource group and in step 503, the reference signals are transmitted sing the second sub-array within the first transmission resource group.
  • Figs. 6 to 11 illustrate example transmission resource group division and CSI-RS port resource allocation schemes in FDM mode in accordance with embodiments of the present disclosure.
  • the first group of configuration resources are determined based on allocated resource configurations for the reference signals and the second group of configuration resources are a subset of the first group of configuration resources.
  • the present disclose is not limited the example transmission resource group division and example resource allocation as provided herein and it can be applied in any application which combines different transmission resource groups and/or uses any suitable allocation solution.
  • PRB #n for example belongs to the first transmission resource group while PRB#n+1 belongs to the second transmission resource group.
  • PRB #n+1 belongs to the first transmission resource group while PRB#n belongs to the second transmission resource group.
  • PRB #n+1 belongs to the first transmission resource group while PRB#n belongs to the second transmission resource group.
  • the first transmission resource group contains PRB #n while the second transmission resource group contains PRB#n+1.
  • A1 Config. 0 + Config. 2 as illustrated in Fig. 6 by bold line blocks.
  • the number of real CSI-RS antenna ports for 28 CSI-RS ports is 28, while the allocated CSR-RS resources contain two 8-port CSI-RS configurations in each PRB pair, i.e. 32 REs in the adjacent PRB pairs.
  • the allocated CSI-RS resource REs are more than the real CSI-RS antenna ports. Therefore, all REs in A1 can be used but four REs in A2 can be unused resources and they can be muted so that their power can be lent to other REs to perform power boosting, thereby tackling power boosting issues.
  • the mute REs cannot be used transmitted Data.
  • the first group of configuration resources (16 ports, i.e., N1) are used within the first transmission resource group while the second group of configuration resources (12 (16-4) ports, i.e., N2) are used within the second transmission resource group.
  • N2 is a subset of N1, i.e., N2 ⁇ N1.
  • the eNB can further send an indication for the second group of configuration resources N2 to the UE directly in step 505.
  • resource to be muted can be determined based on the first group of configuration resources N1 and the second group of configuration resources N2, and thus no RRC signaling or default signaling are required.
  • Fig. 7 illustrates a CSI-RS port resource allocation scheme for 20 CSI-RS ports in accordance with embodiments of the present disclosure.
  • the transmission resources are divided in a similar way, i.e., the first transmission resource group contains PRB #n and the second transmission resource group contains PRB#n+1.
  • the number of real CSI-RS antenna ports for 20 CSI-RS ports is 20, while the allocated CSR-RS resource are three 4-port CSI-RS configurations in each transmission resource group, i.e. 24 REs in the two adjacent PRB pairs.
  • the allocated CSI-RS resource REs are more than the real CSI-RS antenna ports.
  • the eNB can in form the UE the resources for CSI-RS in similar way to that in Fig. 6.
  • the eNB can inform the UE which configuration resources of Config. 0, 2, 5 are to be muted by an RRC signal or alternatively, one of the configurations can be default to be mute in A2, e.g. Config. 5 as illustrated in Fig. 7, so no RRC signal is required anymore.
  • a still further CSI-RS port resource allocation scheme for 24 CSI-RS ports in accordance with embodiments of the present disclosure.
  • This one 4-port/or two 2-port CSI-RS resource can be configured by RRC signaling, or alternatively, the 4-port/or two 2-port CSI-RS resource can be default information between the eNB and the UE.
  • the unused 4-port/or two 2-port CSI-RS resources can be different in the two PRB pair transmission groups. In other words, two chose 12-port CSI-RS configuration resources in different PRB pair transmission groups can be different.
  • Fig. 8 illustrates another CSI-RS port resource allocation scheme for 28 CSI-RS ports in FDM mode in accordance with embodiments of the present disclosure.
  • the transmission resource groups are divided in a similar way, i.e., the first transmission resource group contains PRB #n and the second transmission resource group contains PRB#n+1.
  • a 12-port CSI-RS resource A2 is configured to UE, which is a sub set of A1.
  • the eNB may send an indication to indicate the allocated 16-port CSI-RS resource A1, and for the unused REs in A2, the eNB can send another indication to inform the UE which one of four groups is not chosen or three of four groups are chosen by RRC signal, e.g. 2bits.
  • A2 can be a default subset of A1, which means no RRC signaling is required, e.g. the 8-port CSI-RS Config.
  • the eNB can inform the UE the resources for CSI-RS in similar way to that in Fig. 6 but the unused REs are not muted ones but ones not chosen for the UE, i.e., those not allocated to the UE. Moreover, for REs not to be chosen, they can also be informed to the UE by an indication like an RRC signaling, or the REs not to be chosen can be default information between the eNB and UE and in such a case no RCC signaling is required.
  • the eNB can further send an indication for the second group of configuration resources N2 to the UE directly in step 504.
  • resources not to be chosen can be determined based on the first group of configuration resources N1 and the second group of configuration resources N2, and thus no RRC signaling or default information are required.
  • eNB only need to configure one 16-port CSI-RS resource one time for every PRB pair by legacy configurations mechanism, i.e. two 8-port CSI-RS configurations.
  • legacy configurations mechanism i.e. two 8-port CSI-RS configurations.
  • 32 REs are allocated to the UE both for 28 CSI-RS ports and 32 CSI-RS ports.
  • 4 REs in one of PRB groups are muted or unused by default information or by RRC signaling.
  • three 4-port CSI-RS configurations are configured to UE.
  • three 4-port CSI-RS configurations are configured by RRC signals.
  • a 12-port CSI-RS resource is configured and 24 REs are allocated to the UE both for 20 CSI-RS ports and 24 CSI-RS ports by combining two adjacent RBs.
  • eNB only need to configure one 12-port CSI-RS resource one time for every PRB pair by legacy configurations mechanism, i.e. three 4-port CSI-RS configurations.
  • legacy configurations such as 8-port configurations, 4-port configurations or 2-port configurations
  • more ports can be supported CSI-RS resource.
  • 4 REs in one of PRB groups are muted or unused by default information or by RRC signaling.
  • Fig. 9 illustrates a further CSI-RS port resource allocation scheme for 28 CSI-RS ports in FDM mode in accordance with embodiments of the present disclosure.
  • the difference between the schemes as illustrated in Fig. 8 and Fig. 9 lies in that the REs not used in PRB#n+1 are not four adjacent REs but one of 4-port CSI-RS configurations.
  • the eNB can inform the UE which one of 4-port CSI-RS configurations is not chosen by RRC signaling, e.g. 2bits.
  • Config. 5 is not chosen as illustrated in dashed lines and therefore, and A2 only occupies 12-port CSI-RS resource.
  • a similar scheme can be adopted to that illustrated in Fig. 7, but those unused REs are not muted but those not chosen to allocated to the UE.
  • Fig. 10 illustrates a still further CSI-RS port resource allocation scheme for 28 CSI-RS ports in accordance with embodiments of the present disclosure.
  • This one 2-port CSI-RS resource can be configured by RRC signaling, e.g. 3bits or alternatively, the 2-port CSI-RS resource can be default information between the eNB and the UE.
  • the unused 2-port CSI-RS resources can be different in the two PRB pair transmission groups.
  • Fig. 11 illustrates another CSI-RS port resource allocation scheme for 20 CSI-RS ports in accordance with embodiments of the present disclosure.
  • This one 2-port CSI-RS resource can be configured by RRC signaling, or alternatively, the 2-port CSI-RS resource can be default information between the eNB and the UE.
  • the unused 2-port CSI-RS resources can be different in the two PRB pair transmission groups.
  • Fig. 12 illustrates an example transmission resource group division and CSI-RS port resource allocation schemes in TDM mode in accordance with embodiments of the present disclosure.
  • All port CSI-RS resource REs are allocated within two PRB groups (PRB #x) in different subframes (subframes n and m) .
  • PRB #x PRB #x
  • subframes n and m subframes
  • a 16 (N1) -port CSI-RS resource is configured the first group of subframes n
  • a 12 (N2) -port CSI-RS resource is configured in the second group of subframes m, which is chosen from the 16 (N1) -port CSI-RS resource with four REs or a port configuration muted or unallocated.
  • the difference between resource allocation schemes in TDM and FDM lies in the division of the transmission resource, and other specific resource allocations can reuse those in FDM.
  • same port resources can be configured for the first and second groups of subframes and those not to be used can be muted; or alternatively, those not to be used can are allocated to UE at all for data or other RS transmission.
  • information about the resource configurations can be sent to the UE by means of similar solution as described with reference to the FDM mode.
  • Fig. 13 illustrates a CSI-RS port resource allocation scheme for a 28-port CSI-RS configuration in FDM mode in accordance with embodiments of the present disclosure.
  • PRB #n-1 and PRB n+1 are two closet transmission resources in which four REs are muted or unallocated.
  • PRB #n-1 one 4-REs group in the OFDM symbols containing 8-port CSI-RS Config. 0 is not used, while in PRB n+1, one 4-REs group in the OFDM symbols containing 8-port CSI-RS Config. 2 is not used.
  • resource A2 in PRB #n-1 and resource A2 in PRB #n+1 are different but it is possible to keep the number of CSI-RS REs same in different symbols.
  • the resources to be muted or allocated are not four adjacent REs but a resource configuration, like Config. 5.
  • the eNB can use the existing mechanism to configure ZP CSI-RS for every PRBs in one subframe, e.g. the eNB can use the existing bit map to configure ZP CSI-RS in 4-port CSI-RS configs. 0, 2, 5, 7. And then the eNB uses a new ZP CSI-RS configuration indication to configure ZP-CSI-RS so that Config. 5 is only for the PRB group which contains PRB #n and it is not used in the PRB group which contains PRB #n+1.
  • the new ZP CSI-RS can be used to configure a subset of a transmission resource group and thus different ZP CSI-RS are configured for PRB #n-1 and PRB #n+1.
  • the PRB group contains PRB#n-1 and #n+1 can be further divided to 2 sub-group, the ZP CSI-RS can be configured for the two sub-groups separately.
  • a further new ZP CSI-RS configuration can also be introduced.
  • one CDM-4 group in legacy 16-port CSI-RS can form one unit; in other word, each 8-port CSI-RS resource can be divided into 2 units.
  • all CSI-RS resources are divided to 10 units (unit 0 to 9) for normal subframes and normal CPs, and the eNB can use a RRC signal to configure some of units 0 to 9 are ZP CSI-RS. Therefore, in such a case, the ZP CSI-RS configuration is directed to one or more units instead of a specific CSI-RS configuration.
  • the antenna array is divided based on rows and/or columns of the antenna array.
  • the antenna array can be divided based on rows or columns. For example, two consecutive rows can form a sub-array as illustrated in Fig. 16, or two consecutive columns can form a sub-array as illustrated in Fig. 17.
  • the antenna array can be divided into sub-array 1 (a first sub-array) for PRB group 1 (a first transmission resource group) and a sub-array 2 (a second sub-array) for PRB group 2 (a second transmission resource group) .
  • the sub-arrays can be mapped to two adjacent PRBs, i.e., PRB #n and PRB #n+1, those combined together to transmit CSI-RS as illustrated in Fig. 18; while in TDM, the sub-arrays can be mapped to two different subframes, i.e., subframe #n and subframe #m, as illustrated in Fig. 19.
  • Fig. 18 and 19 are illustrated with 32-port CSI-RS configuration as an example, and for other port configurations, it can use similar schemes.
  • Figs. 20 to 21 illustrate other different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 4x4x2 antenna array is used.
  • two staggered rows form a sub-array and specifically, the first and third rows in the array form the sub-array 1 for the PRB group 1 while the second and fourth rows in the array form the sub-array 2 for the PRB group 2.
  • staggered two columns form a sub-array, and specifically, the first and third columns in the array form the sub-array 1 for the PRB group 1 while the second and fourth column s in the array form the sub-array 2 for the PRB group 2.
  • Figs. 22 to 23 illustrate further different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x8x2 antenna array or a 8x2x2 antenna array is used.
  • Fig. 22 four consecutive columns form a sub-array and specifically, the first to fourth columns in the antenna array form the sub-array 1 for the PRB group 1 while the fifth and eighth columns in the array form the sub-array 2 for the PRB group 2.
  • four consecutive rows form a sub-array and specifically, the first to fourth rows in the array form the sub-array 1 for the PRB group 1 while the fifth and eighth rows in the array form the sub-array 2 for the PRB group 2.
  • Figs. 24 to 25 illustrate still further different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x8x2 antenna array or a 8x2x2 antenna array is used.
  • a 2x8x2 antenna array or a 8x2x2 antenna array is used.
  • four staggered columns form a sub-array and specifically, the first, third, fifth and seventh columns in the array form the sub-array 1 for the PRB group 1 while the second, fourth, sixth and eighth columns in the array form the sub-array 2 for the PRB group 2.
  • Fig. 24 illustrate still further different sub-array divisions for 32 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x8x2 antenna array or a 8x2x2 antenna array is used.
  • four staggered columns form a sub-array and specifically, the first, third, fifth and seventh columns in the array form the sub-array 1 for the PRB group 1 while the second
  • 25 25 staggered rows form a sub-array and specifically, the first, third, fifth and seventh rows in the array form the sub-array 1 for the PRB group 1 while the second, fourth, sixth and eighth rows in the array form the sub-array 2 for the PRB group 2.
  • Figs. 26 to 27 illustrate different sub-array divisions for 28 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x7x2 or 7x2x2 antenna array is used.
  • consecutive columns form a sub-array but the sub-array 1 and the sub-array 2 have different numbers of ports; specifically, the first to fourth columns in the array form the sub-array 1 for the PRB group 1 while the fifth and seventh columns in the array form the sub-array 2 for the PRB group 2.
  • Fig. 26 illustrate different sub-array divisions for 28 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x7x2 or 7x2x2 antenna array is used.
  • consecutive columns form a sub-array but the sub-array 1 and the sub-array 2 have different numbers of ports; specifically, the first to fourth columns in the array form the sub-array 1 for the PRB group 1 while the fifth and seventh columns in the array form the sub-array 2 for the PR
  • consecutive rows form a sub-array
  • the sub-array 1 and the sub-array 2 have different numbers of ports; specifically, the first to fourth rows in the array form the sub-array 1 for the PRB group 1 while the fifth and seventh rows in the array form the sub-array 2 for the PRB group 2.
  • Figs. 28 to 29 illustrate other different sub-array divisions for 28 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x7x2 or 7x2x2 antenna array is used. Different from those illustrated in Figs. 26 and 27, the antenna array is divided into two overlapping groups wherein the overlapping part is illustrated by an area with dots, as illustrated in Fig. 28 and 29. Thus, in these two schemes, the sub-array 1 and sub-array 2 have the same number of ports since the overlapping part is used in both PRB groups.
  • Figs. 30 to 31 illustrate different sub-array divisions for 24 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 3x4x2 antenna array is used.
  • one row in the antenna array forms a sub-array and two consecutive rows form another sub-array 2; specifically, the first column in the array forms the sub-array 1 for the PRB group 1 while the second and third columns in the array form the sub-array 2 for the PRB group 2.
  • consecutive columns form a sub-array; specifically, the first and second columns in the array form the sub-array 1 for the PRB group 1 while the third and fourth columns in the array form the sub-array 2 for the PRB group 2.
  • Figs. 32 to 33 illustrate other different sub-array divisions for 24 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 4x3x2 antenna array is used.
  • two consecutive rows form a sub-array; specifically, the first and second rows in the array form the sub-array 1 for the PRB group 1 while the third and fourth rows in the array form the sub-array 2 for the PRB group 2.
  • one column in the antenna array forms a sub-array and two consecutive columns form another sub-array; specifically, the first and second columns in the array form the sub-array 1 for the PRB group 1 while the third column in the array forms the sub-array 2 for the PRB group 2.
  • Figs. 34 to 35 illustrate different sub-array divisions for 20 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x5x2 or 5x2x2 antenna array is used.
  • consecutive columns form a sub-array but the sub-array 1 and the sub-array 2 have different numbers of ports; specifically, the first to third columns in the array form the sub-array 1 for the PRB group 1 while the fourth and fifth columns in the array form the sub-array 2 for the PRB group 2.
  • Fig. 34 consecutive columns form a sub-array but the sub-array 1 and the sub-array 2 have different numbers of ports; specifically, the first to third columns in the array form the sub-array 1 for the PRB group 1 while the fourth and fifth columns in the array form the sub-array 2 for the PRB group 2.
  • Fig. 34 consecutive columns form a sub-array but the sub-array 1 and the sub-array 2 have different numbers of ports; specifically, the first to third columns in the array
  • Figs. 36 to 37 illustrate other different sub-array divisions for 20 CSI-RS ports in accordance with embodiments of the present disclosure, wherein a 2x5x2 or 5x2x2 antenna array is used. Different from those illustrated in Figs. 34 and 35, the antenna array is divided into two overlapping groups wherein the overlapping part is illustrated by an area with dots, as illustrated in Fig. 36 and 37. Thus, in these two schemes, the sub-array 1 and sub-array 2 have the same number of ports since the overlapping part is used in both PRB groups.
  • At least one of the first sub-array and the second sub-array can be further divided into a plurality of sub-array groups and the plurality of sub-array groups can be mapped to different configuration resources in respective one of the first group of configuration resources and the second group of configuration resources.
  • different sub-array groups can be mapped onto different CSI-RS configuration resource in each transmission resource group.
  • the sub-array can be divided based on based on rows and/or columns of the antenna array or polarization directions of antennae in the antenna array. For example, the mechanism for dividing the sub-array can be different for CDM-2 and CDM-4.
  • a sub-array can be divided based on rows and/or columns of the antenna array since it is allowed to comprise different polarizations in a single transmission resource group. While for CDM-4, a sub-array can be divided based on polarization directions of the antenna array since a single transmission resource group shall use antennae with same polarizations.
  • Fig. 38 to 42 to describe the sub-array division and resource mapping of the sub-array groups.
  • Fig. 38 illustrates an example sub-array group division for 32 CSI-RS ports with CDM-2 in accordance with embodiments of the present disclosure.
  • two 8-port CSI-RS configurations are allocated in each PRB and each of the sub-arrays 1 and 2 is further divided into two sub-array group 1 and 2 based on rows, and each of sub-array groups 1 and 2 is mapped to one 8-port CSI-RS configuration within PRB #n or PRB #n+1.
  • the sub-array group 1 within the sub-array 1 is mapped to Conf. 0 in PRB #n
  • the sub-array group 2 within the sub-array 1 is mapped to Conf.
  • the sub-arrays 1 and 2 can also be divided into two sub-array group 1 and 2 based on other rules, like column, or both rows and column.
  • Fig. 39 illustrates an example sub-array group division for 28 CSI-RS ports with CDM-2 in accordance with embodiments of the present disclosure.
  • the antenna array is divided into two sub arrays 1, 2 based on rows with the scheme as illustrated in Fig. . 28 and each of the sub-arrays 1 and 2 is further divided into two sub-array group 1 and 2 based on rows, as illustrated in Fig. 39.
  • each of sub-array groups 1 and 2 is mapped to one 8-port CSI-RS configuration within PRB #n or PRB #n+1.
  • Fig. 40 illustrates an example sub-array group division for 32 CSI-RS ports with CDM-4 in accordance with embodiments of the present disclosure.
  • two 8-port CSI-RS configurations are allocated in each PRB and each of the sub-arrays 1 and 2 is further divided into two sub-array group 1 and 2 based on their polarizations, and each of sub-array group 1 and 2 is mapped to one 8-port CSI-RS configuration.
  • the sub-array group 1 comprises antennae with a first polarization (indicated by solid lines) and the sub-array group 2 comprises antennae with a different second polarization (indicated by dashed lines) .
  • Sub-array group 1 and 2 in sub-array 1 maps on Config. 0 and Config. 2 within PRB #n respectively.
  • Sub-array group 1 and 2 in sub-array 2 maps on Config. 0 and Config. 2 within PRB #n+1 respectively.
  • the eNB can configure Rel-13 UE to 16 CSI-RS ports. Therefore, the Rel-13 UE and new UE share the same CSI-RS resource.
  • the 16-port CSI-RS in PRB #n and PRB #n+1 measured by Rel-13 UEs are from different antenna ports, but it is transparent for Rel-13 UEs. In this sense, it may impact channel estimation to legacy UE.
  • the solution as described herein can reduce CSI-RS overhead significantly since the new UE and the legacy UE can use the CDM in the same way and the legacy UE needs no additional CSI-RS resources.
  • all solutions described herein can also be used in the Downlink Pilot Time Slot (DwPTs) .
  • DwPTs Downlink Pilot Time Slot
  • Fig. 41 illustrates an example sub-array group division for 24 CSI-RS ports in TDM mode in accordance with embodiments of the present disclosure.
  • sub-array 1 contains two 8-port CSI-RS configurations and sub-array 2 contains one 8-port CSI-RS configuration.
  • Sub-array 2 is further divided into two sub-array group 1 and 2 based on their polarizations, and each of sub-array group 1 and 2 is mapped to one 8-port CSI-RS configuration within the sub-array 2.
  • the sub-array group 1 comprises antennae with a first polarization (indicated by solid lines) and the sub-array group 2 comprises antennae with a different second polarization (indicated by dashed lines) .
  • Sub-array group 1 and 2 in sub-array 1 are mapped on Config. 0 and Config. 2 respectively within subframe #n and the sub-array 2 maps on the 8-port CSI-RS configuration (Config. 1) within subframe #m, as illustrated in Fig. 42.
  • the two subframes #m and #n are better to be two consecutive or close subframes for better channel estimation.
  • the eNB can configure 16 CSI-RS ports to legacy Rel-13 UEs with CDM-4 in subframe #n.
  • the eNB can also configure legacy UE 8 ports with CDM-2.
  • the antenna array division scheme is not limited to the CSI-RS port extension solution as described hereinabove and it can also be applied to any solution wherein different transmission resource groups are used.
  • Figs. 38 to 42 are only some examples of sub-array group division and the present disclosure is not limited thereto. In addition, these embodiments do not show all possibilities of sub-array group division for all possible ports; however the skilled in the art can implement the division based on the ideas and principles as described herein.
  • a plurality of transmission resource groups can be combined to support more ports for the reference signals and the antennae can be divided into different sub-arrays which are mapped onto the plurality of transmission resource groups.
  • legacy UE it can use the sub-array separately to transmit the reference signals and thus no modifications are required, and thus impact on the legacy UE can be reduced substantially.
  • new UE it can uses both the sub-array to transmit the reference signals and it can reuse the legacy signaling mechanisms, which means the RRC signal overhead, and standard complexity can be reduced as well.
  • Fig. 43 schematically illustrates an apparatus for transmitting reference signals according to an embodiment of the present disclosure.
  • the apparatus 4300 can be comprised at a serving node, for example a BS, like a node B (NodeB or NB) .
  • NodeB or NB node B
  • an antenna array for transmitting reference signals is divided to at least a first sub-array and a second sub-array and the apparatus 4300 comprises a group resource mapping unit 4301, a first reference signal transmission unit 4302 and a second reference signal transmission unit 4302.
  • the group resource mapping unit 4301 is configured to map the first sub-array and the second sub-array to a first group of configuration resources within a first transmission resource group and a second group of configuration resources within a second transmission resource group respectively.
  • the first reference signal transmitting unit 4302 is configured to transmit the reference signals using the first sub-array within the first transmission resource group
  • the second reference signal transmitting unit 4303 is configured to transmit the reference signals using the second sub-array within the first transmission resource group.
  • the antenna array can be divided based on rows and/or columns of antennae in the antenna array.
  • the first sub-array and the second sub-array can be partially overlapped with each other for some reference signal ports.
  • At least one of the first sub-array and the second sub-array can be further divided into a plurality of sub-array groups.
  • the apparatus 4300 may further comprise an intra-group resource mapping unit 4304, configured to map the plurality of sub-array groups to different configuration resources in respective one of the first group of configuration resources and the second group of configuration resources.
  • the sub-array can be divided based on rows and/or columns of antennae in the antenna array or based on polarization directions of the antennae.
  • the apparatus 4300 can be operated in a Frequency Division Multiplex (FDM) mode, and wherein one of the first transmission resource group and the second transmission resource group may contain odd-numbered physical resource blocks and the other of them may contain even-numbered physical resource blocks.
  • FDM Frequency Division Multiplex
  • the apparatus 4300 can be performed in a Time Division Multiplexing (TDM) mode, and wherein two subframes to be used to jointly transmit the signal references are consecutive or near subframes.
  • TDM Time Division Multiplexing
  • the first group of configuration resources are determined based on allocated resource configurations for the reference signals and the second group of configuration resources are a subset of the first group of configuration resources.
  • the first group of configuration resources can be a part of the allocated resource configurations. In some embodiments of the present disclosure, resources in the allocated resource configurations unused by the first group of configuration resources and/or the second group of configuration resources can be muted.
  • the allocated resource configurations can comprise a combination of legacy resource configurations for reference signal.
  • the second group of configuration resources contain different configuration resources for two closet transmission resources in the second transmission resource group.
  • the apparatus 4300 may further comprise: an allocated resource indication transmission unit 4305, which is configured to transmit an indication for the allocated resource configurations.
  • the apparatus 4300 may further comprise a first group resource indication transmission unit 4305’ , which is configured to transmit an indication for the first group of configuration resources.
  • the apparatus 4300 further comprises a second group resource indication transmission unit 4306, which is configured to transmit an indication for the second group of configuration resource.
  • the allocated resource indication transmission unit 4305 may further be configured to: transmit an indication for resource configurations; and transmit an indication for resources in the resource configurations not to be allocated to the first group of configuration resources and/or the second group of configuration resources.
  • the apparatus 4300 may further comprise a resource muting indication transmission unit 4307 which is configured to transmit an indication for resource elements or a port configuration to be muted to indicate the unused resources in the allocated resource configurations.
  • the apparatus 4300 may further comprise: a zero power configuration indication transmission unit 4308, configured to transmit an indication for zero power configuration to indicate resource elements or a port configuration to be muted in the first group of configuration resources or the second group of configuration resources.
  • a zero power configuration indication transmission unit 4308 configured to transmit an indication for zero power configuration to indicate resource elements or a port configuration to be muted in the first group of configuration resources or the second group of configuration resources.
  • the apparatus 4300 is described in brief with reference to Fig. 43. It is noted that the apparatus 4300 may be configured to implement functionalities as described with reference to Figs. 5 to 42. Therefore, for details about the operations of modules in the apparatus, one may refer to those descriptions made with respect to the respective steps of the methods with reference to Figs. 4 to 42.
  • the components of the apparatus 4300 may be embodied in hardware, software, firmware, and/or any combination thereof.
  • the components of apparatus 4300 may be respectively implemented by a circuit, a processor or any other appropriate selection device.
  • those skilled in the art will appreciate that the aforesaid examples are only for illustration not for limitation and the present disclosure is not limited thereto; one can readily conceive many variations, additions, deletions and modifications from the teaching provided herein and all these variations, additions, deletions and modifications fall the protection scope of the present disclosure.
  • apparatus 4300 may each comprise at least one processor.
  • the at least one processor suitable for use with embodiments of the present disclosure may include, by way of example, both general and special purpose processors already known or developed in the future.
  • Apparatus 4300 may each further comprise at least one memory.
  • the at least one memory may include, for example, semiconductor memory devices, e.g., RAM, ROM, EPROM, EEPROM, and flash memory devices.
  • the at least one memory may be used to store program of computer executable instructions.
  • the program can be written in any high-level and/or low-level compliable or interpretable programming languages.
  • the computer executable instructions may be configured, with the at least one processor, to cause apparatus 4300 to at least perform operations according to the method as discussed with reference to Figs. 5 to 42 respectively.
  • Fig. 44 further illustrates a simplified block diagram of an apparatus 4410 that may be embodied as or comprised in a terminal device such as UE for a wireless network in a wireless network and an apparatus 4420 that may be embodied as or comprised in a base station such as NB or eNB as described herein.
  • a terminal device such as UE for a wireless network in a wireless network
  • an apparatus 4420 that may be embodied as or comprised in a base station such as NB or eNB as described herein.
  • the apparatus 4410 comprises at least one processor 4411, such as a data processor (DP) and at least one memory (MEM) 4412 coupled to the processor 4411.
  • the apparatus 4410 may further comprise a transmitter TX and receiver RX 4413 coupled to the processor 4411, which may be operable to communicatively connect to the apparatus 4420.
  • the MEM 4412 stores a program (PROG) 4414.
  • the PROG 4414 may include instructions that, when executed on the associated processor 4411, enable the apparatus 4410 to operate in accordance with embodiments of the present disclosure.
  • a combination of the at least one processor 4411 and the at least one MEM 4412 may form processing means 4415 adapted to implement various embodiments of the present disclosure.
  • the apparatus 4420 comprises at least one processor 4421, such as a DP, and at least one MEM 4422 coupled to the processor 4421.
  • the apparatus 4420 may further comprise a suitable TX/RX 4423 coupled to the processor 4421, which may be operable for wireless communication with the apparatus 4410.
  • the MEM 4422 stores a PROG 4424.
  • the PROG 4424 may include instructions that, when executed on the associated processor 4421, enable the apparatus 4420 to operate in accordance with the embodiments of the present disclosure, for example to perform the method 500.
  • a combination of the at least one processor 4421 and the at least one MEM 4422 may form processing means 4425 adapted to implement various embodiments of the present disclosure.
  • Various embodiments of the present disclosure may be implemented by computer program executable by one or more of the processors 4411, 4421, software, firmware, hardware or in a combination thereof.
  • the MEMs 4412 and 4422 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage technology, such as semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples.
  • the processors 4411 and 4421 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors DSPs and processors based on multicore processor architecture, as non-limiting examples.
  • the present disclosure may also provide a carrier containing the computer program as mentioned above, wherein the carrier is one of an electronic signal, optical signal, radio signal, or computer readable storage medium.
  • the computer readable storage medium can be, for example, an optical compact disk or an electronic memory device like a RAM (random access memory) , a ROM (read only memory) , Flash memory, magnetic tape, CD-ROM, DVD, Blue-ray disc and the like.
  • an apparatus implementing one or more functions of a corresponding apparatus described with one embodiment comprises not only prior art means, but also means for implementing the one or more functions of the corresponding apparatus described with the embodiment and it may comprise separate means for each separate function, or means that may be configured to perform two or more functions.
  • these techniques may be implemented in hardware (one or more apparatuses) , firmware (one or more apparatuses) , software (one or more modules) , or combinations thereof.
  • firmware or software implementation may be made through modules (e.g., procedures, functions, and so on) that perform the functions described herein.

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Abstract

Des modes de réalisation de la présente invention concernent un procédé et un appareil pour la transmission de signaux de référence. Lors de la transmission de signaux de référence, un réseau d'antennes pour la transmission de signaux de référence est divisé en au moins un premier sous-réseau et un second sous-réseau, et ainsi le premier sous-réseau et le second sous-réseau sont mis en correspondance avec un premier groupe de ressources de configuration dans un premier groupe de ressources de transmission et un second groupe de ressources de configuration dans un second groupe de ressources de transmission respectivement. Ensuite, les signaux de référence sont transmis à l'aide du premier sous-réseau dans le premier groupe de ressources de transmission, et sont transmis à l'aide du second sous-réseau dans le premier groupe de ressources de transmission.
PCT/CN2016/077841 2016-03-30 2016-03-30 Procédés et appareils de transmission WO2017166114A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014054219A1 (fr) * 2012-10-05 2014-04-10 Nec Corporation Procédé de sélection d'éléments de ressource de mesure de brouillage
US20140177744A1 (en) * 2012-12-20 2014-06-26 Motorola Mobility Llc Method and apparatus for antenna array channel feedback
WO2014190903A1 (fr) * 2013-05-31 2014-12-04 Qualcomm Incorporated Pré-codage linéaire dans des systèmes mimo pleine dimension et sectorisation verticale dynamique
CN105359427A (zh) * 2013-05-01 2016-02-24 Lg电子株式会社 用于在无线通信系统中通过终端发送用于使波束成形分离的反馈信息的方法及其装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014054219A1 (fr) * 2012-10-05 2014-04-10 Nec Corporation Procédé de sélection d'éléments de ressource de mesure de brouillage
US20140177744A1 (en) * 2012-12-20 2014-06-26 Motorola Mobility Llc Method and apparatus for antenna array channel feedback
CN105359427A (zh) * 2013-05-01 2016-02-24 Lg电子株式会社 用于在无线通信系统中通过终端发送用于使波束成形分离的反馈信息的方法及其装置
WO2014190903A1 (fr) * 2013-05-31 2014-12-04 Qualcomm Incorporated Pré-codage linéaire dans des systèmes mimo pleine dimension et sectorisation verticale dynamique

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