WO2019197044A1 - Support de réciprocité d'informations d'état de canal destiné à une opération fondée sur un faisceau - Google Patents

Support de réciprocité d'informations d'état de canal destiné à une opération fondée sur un faisceau Download PDF

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Publication number
WO2019197044A1
WO2019197044A1 PCT/EP2018/059586 EP2018059586W WO2019197044A1 WO 2019197044 A1 WO2019197044 A1 WO 2019197044A1 EP 2018059586 W EP2018059586 W EP 2018059586W WO 2019197044 A1 WO2019197044 A1 WO 2019197044A1
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WO
WIPO (PCT)
Prior art keywords
reference signal
uplink
downlink
resource
uplink reference
Prior art date
Application number
PCT/EP2018/059586
Other languages
English (en)
Inventor
Juha Pekka Karjalainen
Timo Koskela
Mihai Enescu
Sami-Jukka Hakola
Lars Dalsgaard
Jorma Johannes Kaikkonen
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Nokia Technologies Oy
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Priority to PCT/EP2018/059586 priority Critical patent/WO2019197044A1/fr
Publication of WO2019197044A1 publication Critical patent/WO2019197044A1/fr

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Classifications

    • 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
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • 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
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink 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
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection

Definitions

  • the present invention relates to channel state inform ation reciprocity support for beam based operation. More specifically, the present invention exemplarily relates to m easures (including m ethods, apparatuses and computer program products) for realizing channel state inform ation reciprocity support for beam based operation in particular in relation to 3 rd Generation Partnership Project (3GPP) New Radio ( NR) .
  • 3GPP 3 rd Generation Partnership Project
  • NR New Radio
  • the present specification generally relates to 3GPP New Radio (NR) physical layer design in Rel1 5 and onwards. More specifically, the present specification focuses to enhance user equipm ent (UE) m ulti-panel operation with non-beam correspondence at high carrier frequencies.
  • NR 3GPP New Radio
  • All the beam indication procedures for downlink signals are relying on DL RS to be the reference RS to determ ine RX beam at the UE.
  • antenna switching UE procedure is defined to enable DL channel state inform ation (CSI ) acquisition/sounding at gNB-side (gNB: gNodeB) based on uplink (UL) sounding reference signal (SRS) transmission, when a number of TX radio frequency (RF) chains associated with UE antennas/ antenna panels is less than RX RF chains at UE-side.
  • CSI channel state inform ation
  • gNB gNodeB
  • SRS sounding reference signal
  • Figure 6 shows an example of CSI-RS based gNB TX beam identification and UL SRS antenna switching as well as demodulation reference signal (DMRS) UE procedures supported in NR Rel-15.
  • gNB is equipped with two TX panels and UE has capability to use for reception two RX panels simultaneously and for transmission only one TX panel at the time.
  • Figure 6 shows an example of DL CSI-RS based BM and antenna switching procedure as well as DMRS transmission with beam reciprocity.
  • a network has configured by radio resource control (RRC) signaling two CSI-RS sets, i.e. set 1 and set 2, with four single antenna port CSI-RS resources in each resource set for gNB TX beam identification.
  • RRC radio resource control
  • the higher layer parameter repetition has been configured to be OFF indicating each resource within the set to be transmitted into different spatial directions in separate orthogonal frequency-division multiplexing (OFDM) symbols.
  • OFDM orthogonal frequency-division multiplexing
  • UE has been configured to report four strongest L1-RSRP values with CRIs via physical uplink control channel (PUCCFI). Based on a beam report, network initiates UE antenna switching procedure with two CRIs associated with the strongest L1 -RSRP values.
  • PUCFI physical uplink control channel
  • the network has configured one SRS resource set with two SRS resources with single antenna port.
  • network has configured by higher layer parameter SRS-SpatialRelationl nfo for both SRS resources to be with CSI-RS resource indicators (CRI)s associated with the strongest reported L1-RSRP values.
  • CRI CSI-RS resource indicators
  • UE is able to direct its UL TX beam former according to the strongest reported DL CSI-RS resources.
  • UE transmits one single port SRS resource at time instant n from TX panel 1, and at time instant n+L (L represents delay which is subject to numerology) another single port SRS resource is transmitted from TX panel 2.
  • gNB can obtain knowledge of DL CSI that can be used for the computation of non-codebook based precoder for DL PDSCH transmission associated with DMRS.
  • the network informs UE about TX beams associated with DL transmission of DMRS of physical downlink shared channel (PDSCH) via transmission configuration indicator (TCI) states.
  • TCI state associated with DMRS of PDSCH defines the strongest reported DL CSI-RS resources as a source for DMRS resources within TCI-state.
  • DL beam indication framework in NR Rel-15 is based on the assumption of UE beam correspondence between UL and DL beams.
  • DL RS as spatial source for either other DL RS or UL RS.
  • Figure 7 shows an example of SRS based UL beam management (BM) and antenna switching as well as the transmission of DL DMRS for PDSCH.
  • BM SRS based UL beam management
  • UL SRS based UL beam management is used to obtain UE TX beams.
  • Figure 7 shows an example of UL SRS based BM and antenna switching procedure as well as DMRS transmission.
  • a network configures via higher layers two SRS resource sets for UL beam management, namely set 1 and set 2 with two resources in in each set.
  • the network configures the sweeping of different UL TX beams by configuring SRS- ResourceMapping with repetition factor set to 1 for each resource with different sym bol positions.
  • gNB Based on UL BM, gNB determ ines “the best” SRS resources for exam ple according to the largest m easured L1 - RSRPs at the gNB-side. Furthermore, the network configures by higher layer param eter SRS-SpatialRelation l nfo for both SRS resources for antenna switching to be associated with “best” SRI s associated with UL beam m anagem ent .
  • SRI s SRS resources
  • DCI downlink control inform ation
  • RX spatial filter(s) i.e. analog beam form er (s)
  • a method comprising configuring at least one uplink reference signal set with uplink resources for beam management, configuring a terminal with an uplink reference signal resource for uplink beam management out of said at least one uplink reference signal set, receiving, from said terminal, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management, and generating a non-codebook based precoder for downlink transmission towards said terminal based on said received uplink reference signal transmission utilizing said at least one spatial filter.
  • a method comprising receiving a configuration of an uplink reference signal resource for uplink beam management out of at least one configured uplink reference signal set, and transmitting, to a network node, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management.
  • an apparatus comprising at least one processor, at least one memory including computer program code, and at least one interface configured for communication with at least another apparatus, the at least one processor, with the at least one memory and the computer program code, being configured to cause the apparatus to perform: configuring at least one uplink reference signal set with uplink resources for beam management, configuring a terminal with an uplink reference signal resource for uplink beam management out of said at least one uplink reference signal set, receiving, from said terminal, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management, and generating a non-codebook based precoder for downlink transmission towards said terminal based on said received uplink reference signal transmission utilizing said at least one spatial filter.
  • an apparatus comprising at least one processor, at least one memory including computer program code, and at least one interface configured for communication with at least another apparatus, the at least one processor, with the at least one memory and the computer program code, being configured to cause the apparatus to perform: receiving a configuration of an uplink reference signal resource for uplink beam management out of at least one configured uplink reference signal set, and transmitting, to a network node, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management.
  • an apparatus comprising control circuitry configured to configure at least one uplink reference signal set with uplink resources for beam management, and to configure a terminal with an uplink reference signal resource for uplink beam management out of said at least one uplink reference signal set, receiving circuitry configured to receive, from said terminal, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management, and generating circuitry configured to generate a non-codebook based precoder for downlink transmission towards said terminal based on said received uplink reference signal transmission utilizing said at least one spatial filter.
  • an apparatus comprising receiving circuitry configured to receive a configuration of an uplink reference signal resource for uplink beam management out of at least one configured uplink reference signal set, and transmitting circuitry configured to transmit, to a network node, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management.
  • a computer program product comprising computer-executable computer program code which, when the program is run on a computer (e.g. a computer of an apparatus according to any one of the aforementioned apparatus-related exemplary aspects of the present invention), is configured to cause the computer to carry out the method according to any one of the aforementioned method-related exemplary aspects of the present invention.
  • a computer e.g. a computer of an apparatus according to any one of the aforementioned apparatus-related exemplary aspects of the present invention
  • Such computer program product may comprise (or be embodied) a (tangible) computer-readable (storage) medium or the like on which the computer-executable computer program code is stored, and/or the program may be directly loadable into an internal memory of the computer or a processor thereof.
  • any one of the above aspects enables at least an efficient enhancement of TCI -state based DL beam based operation at carrier frequencies above 6 GHz, and/or enables the UE to use UL SRS or any other UL RS (e.g. DMRS for data and/or control, phase tracking reference signal, PTRS) based DL CSI acquisition for non-codebook based DL transmissions as well as DL user scheduling, to thereby solve at least part of the problems and drawbacks identified in relation to the prior art.
  • UL SRS e.g. DMRS for data and/or control, phase tracking reference signal, PTRS
  • channel state information reciprocity support for beam based operation. More specifically, by way of exemplary embodiments of the present invention, there are provided measures and mechanisms for realizing channel state information reciprocity support for beam based operation.
  • FIG. 1 is a block diagram illustrating an apparatus according to exemplary embodiments of the present invention
  • FIG. 2 is a block diagram illustrating an apparatus according to exemplary embodiments of the present invention
  • FIG. 3 is a block diagram illustrating an apparatus according to exemplary embodiments of the present invention.
  • Figure 4 is a schematic diagram of a procedure according to exemplary embodiments of the present invention.
  • Figure 5 is a schematic diagram of a procedure according to exemplary embodiments of the present invention.
  • Figure 6 shows a schematic diagram of a spatial source determination procedure and an antenna switching procedure
  • Figure 7 shows a schematic diagram of a spatial source determination procedure and an antenna switching procedure
  • Figure 8 shows a schematic diagram of a spatial source determination procedure and an antenna switching procedure according to exemplary embodiments of the present invention.
  • Figure 9 is a block diagram alternatively illustrating apparatuses according to exemplary embodiments of the present invention.
  • the following description of the present invention and its embodiments mainly refers to specifications being used as non-limiting examples for certain exemplary network configurations and deployments. Namely, the present invention and its embodiments are mainly described in relation to 3GPP specifications being used as non-limiting examples for certain exemplary network configurations and deployments. As such, the description of exemplary embodiments given herein specifically refers to terminology which is directly related thereto. Such terminology is only used in the context of the presented non-limiting examples, and does naturally not limit the invention in any way. Rather, any other communication or communication related system deployment, etc. may also be utilized as long as compliant with the features described herein.
  • FIG. 1 is a block diagram illustrating an apparatus according to exemplary embodiments of the present invention.
  • the apparatus may be a network node 10 such as a gNB comprising a control circuitry 11, a receiving circuitry 12, and a generating circuitry 13.
  • the control circuitry 11 at least one uplink reference signal set with uplink resources for beam management.
  • the control circuitry 11 further configures a terminal with an uplink reference signal resource for uplink beam management out of said at least one uplink reference signal set.
  • the receiving circuitry 12 receives, from said terminal, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management.
  • FIG. 4 is a schematic diagram of a procedure according to exemplary embodiments of the present invention.
  • the apparatus according to Figure 1 may perform the method of Figure 4 but is not limited to this method.
  • the method of Figure 4 may be performed by the apparatus of Figure 1 but is not limited to being performed by this apparatus.
  • a procedure comprises an operation of configuring (S41) at least one uplink reference signal set with uplink resources for beam management, an operation of configuring (S42) a terminal with an uplink reference signal resource for uplink beam management out of said at least one uplink reference signal set, an operation of receiving (S43), from said terminal, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management, and an operation of generating (S44) a non codebook based precoder for downlink transmission towards said terminal based on said received uplink reference signal transmission utilizing said at least one spatial filter.
  • FIG. 2 is a block diagram illustrating an apparatus according to exem plary embodim ents of the present invention. I n particular, Figure 2 illustrates a variation of the apparatus shown in Figure 1 . The apparatus according to Figure 2 m ay thus further com prise scheduling circuitry 21 and/or transm itting circuitry 22.
  • the at least one uplink reference signal set with uplink resources for beam m anagem ent m ay be at least one uplink sounding reference signal set with uplink resources for beam m anagem ent.
  • the at least one uplink reference signal set with uplink resources for beam m anagem ent m ay be at least one uplink reference signal set with uplink resources for beam m anagem ent with antenna switching.
  • an exem plary m ethod according to exem plary embodim ents of the present invention m ay com prise an operation of configuring a transm ission configuration indicator state for said downlink transm ission towards said term inal indicative of that said at least one uplink reference signal resource or a resource set including said uplink reference signal resource is to be used as a spatial source for downlink reference signal resource determ ination of said at least one spatial filter.
  • exemplary details of the configuring operation (configuring said transmission configuration indicator state for said downlink transmission towards said terminal) are given, which are inherently independent from each other as such.
  • Such exemplary configuring operation may utilize radio resource control signaling.
  • an exemplary method according to exemplary embodiments of the present invention may comprise an operation of scheduling a downlink demodulation reference signal associated with said at least one spatial filter based on said non-codebook based precoder.
  • an exemplary method according to exemplary embodiments of the present invention may comprise an operation of transmitting said downlink demodulation reference signal to said terminal.
  • Such exemplary configuring operation may utilize radio resource control signaling.
  • the uplink reference signal resource m ay be at least one of an uplink sounding reference signal resource used for user equipm ent antenna switching or uplink beam m anagem ent, an uplink demodulation reference signal resource, and an uplink phase tracking reference signal resource.
  • the downlink transm ission towards said term inal m ay be at least one of a downlink demodulation reference signal associated with a physical downlink shared channel, a downlink demodulation reference signal associated with a physical downlink control channel, a downlink channel state inform ation reference signal associated with channel state inform ation acquisition, a downlink channel state inform ation reference signal associated with channel state inform ation beam m anagem ent, a downlink channel state inform ation reference signal associated with fine frequency and tim e tracking, a downlink phase tracking reference signal, and a downlink demodulation reference signal associated with physical broadcast channel, physical downlink control channel and physical downlink shared channel for rem aining m inim um system inform ation , paging, other system inform ation (OSI ) and other broadcast inform ation delivery.
  • OSI system inform ation
  • FIG. 3 is a block diagram illustrating an apparatus according to exem plary em bodim ents of the present invention.
  • the apparatus m ay be a term inal 30 such as a UE com prising a receiving circuitry 31 , and a transm itting circuitry 32.
  • the receiving circuitry 31 receives a configuration of an uplink reference signal resource for uplink beam m anagem ent out of at least one configured uplink reference signal set.
  • the transm itting circuitry 32 transm its, to a network node, an uplink reference signal transm ission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam m anagem ent.
  • Figure 5 is a schem atic diagram of a procedure according to exem plary embodim ents of the present invention.
  • the apparatus according to Figure 3 m ay perform the m ethod of Figure 5 but is not limited to this method.
  • the method of Figure 5 may be performed by the apparatus of Figure 3 but is not limited to being performed by this apparatus.
  • a procedure according to exemplary embodiments of the present invention comprises an operation of receiving (S51) a configuration of an uplink reference signal resource for uplink beam management out of at least one configured uplink reference signal set, and an operation of transmitting (S52), to a network node, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management.
  • At least some of the functionalities of the apparatus shown in Figure 3 may be shared between two physically separate devices forming one operational entity. Therefore, the apparatus may be seen to depict the operational entity comprising one or more physically separate devices for executing at least some of the described processes.
  • the configuration of said uplink reference signal resource for uplink beam management may be a configuration of an uplink sounding reference signal resource for uplink beam management.
  • the configuration of said uplink reference signal resource for uplink beam management may be a configuration of said uplink reference signal resource for uplink beam management with antenna switching.
  • an exemplary method may comprise an operation of receiving a configuration of a transmission configuration indicator state for a downlink transm ission for which a non-codebook based precoder is generated based on said reference signal transm ission utilizing said at least one spatial filter, the transm ission configuration indicator state being indicative of that said at least one uplink reference signal resource or a resource set including said uplink reference signal resource is to be used as a spatial source for downlink reference signal determ ination of said at least one spatial filter for UE receiver.
  • the configuration of said transm ission configuration indicator state for said downlink transm ission m ay be received via radio resource control signaling.
  • an exem plary m ethod according to exem plary embodim ents of the present invention m ay com prise an operation of receiving a scheduling of a downlink demodulation reference signal precoded with non-codebook based precoder associated with spatial filter based on transm ission configuration indicator state.
  • an exem plary m ethod according to exem plary embodim ents of the present invention m ay com prise an operation of receiving said downlink demodulation reference signal with spatial filter according transm ission configuration indicator state spatial inform ation associated with demodulation reference signal resource.
  • the at least one configured uplink reference signal set m ay be configured via radio resource control signaling.
  • the uplink sounding reference signal resource m ay be at least one of an uplink reference signal resource used for user equipm ent antenna switching or uplink beam m anagem ent, an uplink demodulation reference signal resource, and an uplink phase tracking reference signal resource.
  • the downlink transm ission towards said term inal m ay be at least one of a downlink demodulation reference signal associated with a physical downlink shared channel, a downlink demodulation reference signal associated with a physical downlink control channel, a downlink channel state inform ation reference signal associated with channel state inform ation acquisition, a downlink channel state inform ation reference signal associated with channel state inform ation beam m anagem ent, a downlink channel state inform ation reference signal associated with fine frequency and tim e tracking, a downlink phase tracking reference signal, and a downlink demodulation reference signal associated with physical broadcast channel, physical downlink control channel and physical downlink shared channel for rem aining m inim um system inform ation , paging, other system inform ation (OSI ) and other broadcast inform ation delivery.
  • OSI system inform ation
  • a UE procedure and related signaling for situation is provided when there is no beam correspondence between DL RX and UL TX beams at UE-side or UL TX beam m anagem ent is perform ed to identify UE TX beams and related RS resources for DL CSI acquisition or DL transm ission related to any DL RS, e.g. DMRS or CSI - RS.
  • DL RS e.g. DMRS or CSI - RS.
  • the UE procedure according to exem plary em bodim ents of the present invention enables the UE to use UL SRS or any other UL RS based DL CSI acquisition for non-codebook based DL transm issions as well as DL user scheduling.
  • a generic spatial reference rule is provided, which defines any UL RS to be as spatial reference for any DL RS.
  • uplink sounding reference signal (UL SRS) resource used for UE antenna switching or any UL RS (including UL SRS) used for UL beam management is used as spatial reference for spatial filter used to receive a downlink reference signal.
  • UL SRS uplink sounding reference signal
  • uplink reference signal (UL RS) resource e.g. sounding reference signal SRS
  • SRS sounding reference signal
  • DL DMRS downlink demodulation reference signal
  • PDSCH physical downlink shared channel
  • uplink reference signal (UL RS) resource e.g. sounding reference signal SRS
  • SRS sounding reference signal
  • UE antenna switching and/or used for UL beam management is used as spatial reference for spatial filter used to receive DL DMRS associated with physical downlink control channel (PDCCH).
  • PDCCH physical downlink control channel
  • uplink reference signal (UL RS) resource e.g. sounding reference signal SRS
  • SRS sounding reference signal
  • DL CSI-RS downlink channel state information reference signal
  • uplink reference signal (UL RS) resource e.g. sounding reference signal SRS
  • SRS sounding reference signal
  • uplink reference signal (UL RS) resource e.g. sounding reference signal SRS
  • SRS sounding reference signal
  • uplink reference signal (UL RS) resource e.g. sounding reference signal SRS
  • SRS sounding reference signal
  • PTRS phase tracking reference signal
  • uplink reference signal (UL RS) resources as spatial source for downlink reference signal (DL RS) transmission at carrier frequencies above 6GHz
  • UL RS uplink reference signal
  • DL RS downlink reference signal
  • UL DMRS resource is used as a spatial reference for spatial filter used to receive DL DMRS associated with PDSCH.
  • uplink demodulation reference signal (UL DMRS) resource is used as spatial reference for spatial filter used to receive DL DMRS associated with PDCCH.
  • UL DMRS uplink demodulation reference signal
  • UL DMRS resource is used as spatial reference for spatial filter used to receive DL CSI-RS associated with CSI acquisition. According to exemplary embodiments of the present invention, UL DMRS resource is used as spatial reference for spatial filter used to receive DL CSI-RS associated with CSI beam management.
  • UL DMRS resource is used as spatial reference for spatial filter used to receive DL CSI-RS associated with fine frequency and time tracking (TRS) .
  • TRS fine frequency and time tracking
  • UL DMRS resource is used as spatial reference for spatial filter used to receive DL phase tracking reference signal (PTRS).
  • PTRS phase tracking reference signal
  • uplink phase tracking reference signal (UL PTRS) resource is used as a spatial reference for spatial filter used to receive DL DMRS of PDSCH.
  • UL PTRS resource is used as a spatial reference for spatial filter used to receive DL DMRS Of PDCCH.
  • UL PTRS resource is used as spatial reference for spatial filter used to receive DL CSI-RS associated with CSI acquisition.
  • UL PTRS resource is used as spatial reference for spatial filter used to receive DL CSI-RS associated with CSI beam management.
  • UL PTRS resource is used as spatial reference for spatial filter used to receive DL CSI-RS associated with fine frequency and time tracking (TRS).
  • TRS fine frequency and time tracking
  • UL PTRS resource is used as spatial reference for spatial filter used to receive DL phase tracking reference signal (PTRS).
  • UL PTRS resource is used as spatial reference for spatial filter used to receive DL a downlink demodulation reference signal associated with a physical broadcast channel, PDCCH and PDSCH for remaining minimum system information RMSI, paging, other system information OSI and other broadcast information delivery.
  • a network is enabled to configure UL RS, e.g. SRS/D MRS/ PTRS, to be used as a spatial source in TCI-state for DL RS, e.g. DMRS of PDSCH/PDCCH or CSI-RS (CSI acquisition, beam management, or time and frequency tracking, DMRS for a physical broadcast channel, PDCCH and PDSCH for remaining minimum system information RMSI, paging, other system information OSI and other broadcast information delivery).
  • DL RS e.g. DMRS of PDSCH/PDCCH or CSI-RS (CSI acquisition, beam management, or time and frequency tracking, DMRS for a physical broadcast channel, PDCCH and PDSCH for remaining minimum system information RMSI, paging, other system information OSI and other broadcast information delivery).
  • NR Rel-15 or Rel-16 would be able to support non codebook based precoding when DL CSI is obtained via on UL SRS based sounding and beam correspondence is not supported at UE-side or UL RS (e.g. UL SRS) based beam management with and without beam correspondence support at UE-side.
  • UL SRS e.g. UL SRS
  • Figure 8 shows an implementation example of exemplary embodiments of the present invention in conjunction of UL SRS based beam management and antenna switching as well as DL DMRS transmission.
  • Figure 8 shows an example of the enhancement to TCI-state that enables UL SRS to be used as a spatial QCL source (QCL-type D) for DL DMRS configuration.
  • the resource configuration for SRS resource sets associated with UL BM and antenna switching are exactly sam e as in Figure 7.
  • the antenna switching works sim ilarly as previously described in Figure 6 and Figure 7. I n com parison with previous exam ple in Figure 7, by using exemplary embodim ents of the present invention a network is able to configure UL SRS resources, i.e. SRS resource 1 and SRS resource 2, to be used as a spatial source in TCI -state for DMRS of PDSCH before DL DMRS is scheduled.
  • UE is able to direct its RX spatial filter (beam form er) correctly according to DL TX beam associated with DMRS of PDSCH.
  • the non-codebook based precoding can also be used in NR Rel- 1 5/ 1 6 system , thereby solving at least in part problems of the prior art.
  • TRS Tracking Reference Signal
  • the line reflecting the necessary reference to the resources to be used as a spatial reference for spatial filter is:
  • This line m ay be inserted into a corresponding TCI -state definition e.g. in TS 38.331 .
  • a UE may be configured with RS for UL.
  • a UE m ay be configured with SRS for UL sounding with antenna switching.
  • a UE m ay be configured with SRS for UL beam m anagem ent without antenna switching.
  • the UE m ay perform SRS transm ission with the corresponding spatial filter(s) .
  • the UE may be configured with TCI state which links in terms of QCL type D the DL DMRS with the UL SRS.
  • the UE may receive DL DMRS which is associated with the spatial filter used for the transmission of the SRS.
  • a gNB may configure by RRC-signaling SRS set(s) with resources for antenna switching.
  • the gNB may configure by RRC-signaling TCI state associated with DMRS of PDSCH such that UL SRS resource(s) is used as spatial source, i.e. QCL- type D, for DMRS of PDSCH.
  • the gNB may compute non-codebook based precoder to be used with DMRS of PDSCH and PDSCH.
  • the gNB may schedule DL DMRS and PDSCH transmissions via PDCCH
  • TCI-state based DL beam based operation at carrier frequencies above 6 GHz is enhanced.
  • NR Rel-15 is enabled to support non-codebook based precoding in DL when beam correspondence is not supported at UE-side.
  • the NR Rel-15 is enabled to support non-codebook based precoding in DL not only in such case.
  • it is enabled as well for example when beam correspondence is supported at UE-side.
  • the present invention provides benefit as well with beam correspondence with UL SRS or any other UL RS beam management.
  • the network entity may comprise further units that are necessary for its respective operation. However, a description of these units is omitted in this specification.
  • the arrangement of the functional blocks of the devices is not construed to limit the invention, and the functions may be performed by one block or further split into sub-blocks.
  • the apparatus i.e. network entity (or some other means) is configured to perform some function
  • this is to be construed to be equivalent to a description stating that a (i.e. at least one) processor or corresponding circuitry, potentially in cooperation with computer program code stored in the memory of the respective apparatus, is configured to cause the apparatus to perform at least the thus mentioned function.
  • a (i.e. at least one) processor or corresponding circuitry potentially in cooperation with computer program code stored in the memory of the respective apparatus, is configured to cause the apparatus to perform at least the thus mentioned function.
  • function is to be construed to be equivalently implementable by specifically configured circuitry or means for performing the respective function (i.e. the expression “unit configured to” is construed to be equivalent to an expression such as“means for”).
  • the apparatus (network node) 10’ (corresponding to the network node 10) comprises a processor 91, a memory 92 and an interface 93, which are connected by a bus 94 or the like.
  • the apparatus (terminal) 30’ (corresponding to the terminal 30) comprises a processor 95, a memory 96 and an interface 97, which are connected by a bus 98 or the like, and the apparatuses may be connected via link 99, respectively.
  • the processor 91/95 and/or the interface 93/97 may also include a modem or the like to facilitate communication over a (hardwire or wireless) link, respectively.
  • the interface 93/97 may include a suitable transceiver coupled to one or more antennas or communication means for (hardwire or wireless) communications with the linked or connected device(s), respectively.
  • the interface 93/97 is generally configured to communicate with at least one other apparatus, i.e. the interface thereof.
  • the memory 92/96 may store respective programs assumed to include program instructions or computer program code that, when executed by the respective processor, enables the respective electronic device or apparatus to operate in accordance with the exemplary embodiments of the present invention.
  • the respective devices/ apparatuses may represent means for performing respective operations and/or exhibiting respective functionalities, and/or the respective devices (and/or parts thereof) may have functions for performing respective operations and/or exhibiting respective functionalities.
  • processor or some other means
  • the processor is configured to perform some function
  • this is to be construed to be equivalent to a description stating that at least one processor, potentially in cooperation with computer program code stored in the memory of the respective apparatus, is configured to cause the apparatus to perform at least the thus mentioned function.
  • function is to be construed to be equivalently implementable by specifically configured means for performing the respective function (i.e. the expression“processor configured to [cause the apparatus to] perform xxx-ing” is construed to be equivalent to an expression such as“means for xxx-ing”).
  • an apparatus representing the network node 10 comprises at least one processor 91, at least one memory 92 including computer program code, and at least one interface 93 configured for communication with at least another apparatus.
  • the processor i.e. the at least one processor 91, with the at least one memory 92 and the computer program code
  • the processor is configured to perform configuring at least one uplink reference signal set with uplink resources for beam management (thus the apparatus comprising corresponding means for configuring), to perform configuring a terminal with an uplink reference signal resource for uplink beam management out of said at least one uplink reference signal set, to perform receiving, from said terminal, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management (thus the apparatus comprising corresponding means for receiving), and to perform generating a non-codebook based precoder for downlink transmission towards said terminal based on said received uplink reference signal transmission utilizing said at least one spatial filter (thus the apparatus comprising corresponding means for generating).
  • an apparatus representing the terminal 30 comprises at least one processor 95, at least one memory 96 including computer program code, and at least one interface 97 configured for communication with at least another apparatus.
  • the processor i.e. the at least one processor 95, with the at least one memory 96 and the computer program code
  • the processor is configured to perform receiving a configuration of an uplink reference signal resource for uplink beam management out of at least one configured uplink reference signal set (thus the apparatus comprising corresponding means for receiving), and to perform transmitting, to a network node, an uplink reference signal transmission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam management (thus the apparatus comprising corresponding means for transmitting).
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the embodiments and its modification in terms of the functionality implemented;
  • - method steps and/or devices, units or means likely to be implemented as hardware components at the above-defined apparatuses, or any module(s) thereof, are hardware independent and can be implemented using any known or future developed hardware technology or any hybrids of these, such as MOS (Metal Oxide Semiconductor), CMOS (Complementary MOS), BiMOS (Bipolar MOS), BiCMOS (Bipolar CMOS), ECL (Emitter Coupled Logic), TTL (Transistor- Transistor Logic), etc., using for example ASIC (Application Specific IC (Integrated Circuit)) components, FPGA (Field-programmable Gate Arrays) components, CPLD (Complex Programmable Logic Device) components or DSP (Digital Signal Processor) components; - devices, units or means (e.g.
  • the above-defined network entity or network register, or any one of their respective units/means can be implemented as individual devices, units or means, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device, unit or means is preserved;
  • an apparatus like the user equipment and the network entity /network register may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of an apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable software code portions for execution/being run on a processor;
  • a device may be regarded as an apparatus or as an assembly of more than one apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.
  • respective functional blocks or elements according to above-described aspects can be implemented by any known means, either in hardware and/or software, respectively, if it is only adapted to perform the described functions of the respective parts.
  • the mentioned method steps can be realized in individual functional blocks or by individual devices, or one or more of the method steps can be realized in a single functional block or by a single device.
  • any method step is suitable to be implemented as software or by hardware without changing the idea of the present invention.
  • Devices and means can be implemented as individual devices, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device is preserved. Such and similar principles are to be considered as known to a skilled person.
  • Software in the sense of the present description com prises software code as such com prising code m eans or portions or a com puter program or a com puter program product for perform ing the respective functions, as well as software (or a com puter program or a com puter program product) em bodied on a tangible medium such as a com puter- readable (storage) m edium having stored thereon a respective data structure or code m eans/portions or em bodied in a signal or in a chip, potentially during processing thereof .
  • the present invention also covers any conceivable com bination of m ethod steps and operations described above, and any conceivable combination of nodes, apparatuses, modules or elem ents described above, as long as the above-described concepts of m ethodology and structural arrangem ent are applicable.
  • m easures for channel state inform ation reciprocity support for beam based operation exemplarily com prise configuring at least one uplink reference signal set with uplink resources for beam m anagem ent, configuring a term inal with an uplink reference signal resource for uplink beam m anagem ent out of said at least one uplink reference signal set , receiving, from said term inal, an uplink reference signal transm ission utilizing at least one spatial filter corresponding to said uplink reference signal resource for uplink beam m anagem ent, and generating a non-codebook based precoder for downlink transm ission towards said term inal based on said received uplink reference signal transm ission utilizing said at least one spatial filter.
  • TCI transmission configuration indicator TRS time frequency tracking reference signal UL uplink

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

Abstract

L'invention concerne des mesures d'un support de réciprocité d'informations d'état de canal destiné à une opération fondée sur un faisceau. À titre d'exemple, lesdites mesures comprennent la configuration d'un ou plusieurs ensembles de signaux de référence de liaison montante avec des ressources de liaison montante pour la gestion de faisceau, la configuration d'un terminal avec une ressource de signal de référence de liaison montante pour la gestion de faisceau de liaison montante parmi lesdits ensembles de signaux de référence de liaison montante, la réception, en provenance dudit terminal, d'une transmission de signal de référence de liaison montante utilisant au moins un filtre spatial correspondant à ladite ressource de signal de référence de liaison montante pour une gestion de faisceau de liaison montante, et la génération d'un précodeur non fondé sur un livre de codes pour une transmission de liaison descendante vers ledit terminal en fonction de ladite transmission de signal de référence de liaison montante reçue à l'aide desdits filtres spatiaux.
PCT/EP2018/059586 2018-04-13 2018-04-13 Support de réciprocité d'informations d'état de canal destiné à une opération fondée sur un faisceau WO2019197044A1 (fr)

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WO2021087902A1 (fr) * 2019-11-07 2021-05-14 Zte Corporation Procédé de communication sans fil permettant de déterminer une relation spatiale et un paramètre de commande de puissance pour des signaux de liaison montante
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CN111758272B (zh) * 2020-05-22 2023-09-26 北京小米移动软件有限公司 Srs资源配置方法、srs资源确定方法和装置
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CN115004598A (zh) * 2020-10-19 2022-09-02 北京小米移动软件有限公司 Pusch指示方法和装置、pusch发送方法和装置
CN115004598B (zh) * 2020-10-19 2024-02-20 北京小米移动软件有限公司 Pusch指示方法和装置、pusch发送方法和装置
WO2023044778A1 (fr) * 2021-09-24 2023-03-30 Apple Inc. Structure de tci unifiée

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