[go: up one dir, main page]

WO2025153039A1 - Procédés et appareil de mesure d'informations d'état de canal dans des communications mobiles - Google Patents

Procédés et appareil de mesure d'informations d'état de canal dans des communications mobiles

Info

Publication number
WO2025153039A1
WO2025153039A1 PCT/CN2025/072907 CN2025072907W WO2025153039A1 WO 2025153039 A1 WO2025153039 A1 WO 2025153039A1 CN 2025072907 W CN2025072907 W CN 2025072907W WO 2025153039 A1 WO2025153039 A1 WO 2025153039A1
Authority
WO
WIPO (PCT)
Prior art keywords
resource
imr
cmr
pdsch
dmrs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/072907
Other languages
English (en)
Inventor
Chin-Kuo Jao
Kuan-Hung Chou
Sandeep Bhat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MediaTek Inc
Original Assignee
MediaTek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MediaTek Inc filed Critical MediaTek Inc
Publication of WO2025153039A1 publication Critical patent/WO2025153039A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • 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
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present disclosure is generally related to mobile communications and, more particularly, to channel state information measurement with respect to apparatus in mobile communications.
  • channel state information (CSI) measurement is a critical feature designed to support adaptive resource allocation between a network node (e.g., a base station) and a user equipment (UE) .
  • the CSI measurement may involve the network node transmitting a CSI-reference signal (CSI-RS) to the UE, allowing the UE to assess the quality of the communication channel.
  • CSI-RS CSI-reference signal
  • the UE may generate CSI feedback (e.g., CSI report) , which typically includes metrics such as the channel quality indicator (CQI) , precoding matrix indicator (PMI) and/or rank indicator (RI) .
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indicator
  • the CSI feedback may then be transmitted back to the network node, enabling the network node to dynamically adjust transmission parameters to enhance performance.
  • These parameters may include modulation schemes, coding rates, and spatial multiplexing techniques, which are tailored to current channel conditions to optimize data throughput, minimize interference and improve
  • a network node may transmit a downlink control information (DCI) to a user equipment (UE) .
  • the DCI may indicate at least one of a channel measurement resource (CMR) and an interference measurement resource (IMR) based on a reference signal (RS) resource set.
  • the RS resource set may include resource (s) used for RS.
  • the RS resource set may include at least one of a CSI-RS resource set, a demodulation reference signal (DMRS) resource set and a physical downlink shared channel (PDSCH) resource set.
  • the UE may measure the CMR and the IMR to determine a CSI report. Then, the UE may transmit the CSI report to the network node.
  • the network node may transmit a DCI to the UE.
  • the DCI may include a CSI report request indicating at least one of a CMR and an IMR based on an RS resource set.
  • the network node may configure the RS resource set for the UE by a higher layer signaling (e.g., radio resource control (RRC) or MAC-CE) .
  • the higher layer signaling may further indicate that the RS resource set may be used for CMR and/or IMR of a CSI report configuration.
  • the RS resource set may include at least one of a CSI-RS resource set, a demodulation reference signal (DMRS) resource set and a physical downlink shared channel (PDSCH) resource set.
  • DMRS demodulation reference signal
  • PDSCH physical downlink shared channel
  • the RS resource set may include RS resource (s) .
  • the RS resource set may include resource (s) or port (s) used for RS transmission (s) .
  • the RS resource set may be shared with multiple UEs (e.g., multi-user multiple-input multiple-output (MU-MIMO)) or multiple transmission-reception points (TRPs) for RS transmission (s) .
  • MU-MIMO multi-user multiple-input multiple-output
  • TRPs transmission-reception points
  • the DCI may include the at least one field to indicate at least one of CSI resource (s) , DMRS port (s) and PDSCH resource (s) for the at least one of the CMR and the IMR based on the RS resource set while the RS resource set may include at least one of a CSI-RS resource set, a DMRS resource set (i.e., DMRS port set) and a PDSCH resource set.
  • the RS resource set in an event that the RS resource set includes the DMRS resource set.
  • the RS resource (s) in the DMRS resource set may include DMRS port (s) used for DMRS transmission (s) .
  • the DMRS resource set includes DMRS ports ⁇ 1000 to 1011 ⁇ .
  • DMRS port ⁇ 1006 ⁇ is used for UE#1 (i.e., the UE)
  • DMRS ports ⁇ 1007, 1008 ⁇ are used for UE#2
  • DMRS port ⁇ 1009 ⁇ is used for UE#3
  • DMRS port ⁇ 1010 ⁇ is used for UE#4
  • DMRS port ⁇ 1011 ⁇ is used for UE#5.
  • the RS resource set includes the CSI-RS resource set.
  • the RS resource (s) in the CSI-RS resource set may include CSI-RS resource (s) used for CSI-RS transmission (s) .
  • the CSI-RS resource set includes non-zero power (NZP) CSI-RS resources ⁇ 3000 to 3007 ⁇ .
  • CSI-RS resources ⁇ 3000, 3001 ⁇ are used for UE#1 (i.e., the UE)
  • CSI-RS resource ⁇ 3002 ⁇ is used for UE#2
  • CSI-RS resource ⁇ 3003 ⁇ is used for UE#3
  • CSI-RS resources ⁇ 3004, 3005 ⁇ are used for UE#4
  • CSI-RS resources ⁇ 3006, 3007 ⁇ are used for UE#5.
  • the RS resource set includes the PDSCH resource set.
  • the RS resource (s) in the PDSCH resource set may include PDSCH resource (s) used for PDSCH transmission (s) .
  • a table associated with resource (s) for CMR and IMR may be configured by the RRC transmitted from the network node to the UE.
  • the table may include a plurality of items associated with resource (s) for CMR and IMR.
  • the table may include candidates of CMR and IMR.
  • the network node may transmit the DCI to indicate which item (s) of the table the UE may use for CMR and/or IMR.
  • the network node may trigger the CSI report for different UE pairing combinations by the DCI indicating at least one item (i.e., at least one resource of the RS resource) of the table for interference measurement. For example, in an event that the network node needs the UE to report the CSI report associated with interferences from UE#2 and UE#3, the network node transmits the DCI to the UE, and the DCI indicates items (i.e., resources of the RS resource) of the table while these items are used for UE#2 and UE#3.
  • the DCI indicates items (i.e., resources of the RS resource) of the table while these items are used for UE#2 and UE#3.
  • one channel state hypothesis may be a candidate of CMR and IMR in which at least one CMR may be paired with at least one IMR.
  • the DCI may include at least one field including at least one index (e.g., codepoint) associated with the table (e.g., codepoint table) of the candidates of CMR and IMR, and the at least one index may indicate the at least one of the CMR and the IMR.
  • each item of the table of the candidates of CMR and IMR candidates may include DMRS port groups or DMRS code division multiplexing (CDM) groups.
  • the table may be activated by MAC-CE.
  • the table may be used for single user multiple-input multiple-output (SU-MIMO) , MU-MIMO, non-coherent joint transmission (NCJT) or coherent joint transmission (CJT) CSI measurement and/or report.
  • SU-MIMO single user multiple-input multiple-output
  • MU-MIMO MU-MIMO
  • NJT non-co
  • the table is a codepoint table.
  • code point (i.e., index) ‘0’ represents DMRS port ⁇ 1006 ⁇ used for UE#1
  • code point ‘1’ represents DMRS port ⁇ 1009 ⁇ used for UE#3
  • code point ‘2’ represents DMRS port ⁇ 1010 ⁇ used for UE#4
  • code point ‘3’ represents a pair of DMRS ports ⁇ 1007 ⁇ 1008 ⁇ used for UE#2 and ⁇ 1009 ⁇ used for UE#3
  • code point ‘4’ represents a pair of DMRS ports ⁇ 1009 ⁇ used for UE#3 and ⁇ 1010 ⁇ used for UE#4
  • code point ‘5’ represents a pair of DMRS ports ⁇ 1010 ⁇ used for UE#4 and ⁇ 1011 ⁇ used for UE#5.
  • the network node in an event that the network node needs the UE to measure DMRS port ⁇ 1006 ⁇ for CMR, the network node transmits the DCI to the UE while a specific field of the DCI used for CMR has value ‘0’ .
  • the network node In an event that the network node needs the UE to measure DMRS ports ⁇ 1009 ⁇ and ⁇ 1010 ⁇ for IMR (i.e., measure UE#2 and UE#3 for interference measurement) , the network node transmits the DCI to the UE while a specific field of the DCI used for IMR has value ‘4’ .
  • the UE may measure the CMR and the IMR to determine a CSI report based on the DCI and the CSI report configuration associated with the CSI report request. More specifically, based on the CSI report request from the network node, the UE may measure the CMR and the IMR to derive some channel information (e.g., a rank indicator (RI) , a precoding matrix indicator (PMI) and/or a channel quality indicator (CQI) ) , and transmit the CSI report including this channel information to the network node based on the corresponding CSI report configuration.
  • some channel information e.g., a rank indicator (RI) , a precoding matrix indicator (PMI) and/or a channel quality indicator (CQI)
  • the CMR may be configured in the CSI report configuration for the UE.
  • the IMR may be configured or may not be configured in the CSI report configuration for the UE.
  • the UE may measure the CMR and the IMR based on the CSI report configuration.
  • the UE may measure the CMR based on the CSI report configuration and measure (i.e., determine) the IMR in other ways.
  • RANK i.e., the indicator parameter of MIMO data stream capacity
  • the UE may measure (i.e., determine) the IMR based on at least one port of a paired DMRS port (s) of the DMRS port (s) of PDSCH.
  • the UE is indicated to use DMRS ports ⁇ 0, 1 ⁇ for PDSCH by the DCI, and DMRS ports ⁇ 2, 3 ⁇ are the paired DMRS ports.
  • the UE uses (a) DMRS ports ⁇ 0, 1 ⁇ for the PDSCH transmission and the CMR measurement and (b) DMRS ports ⁇ 2, 3 ⁇ for the IMR measurement.
  • the paired DMRS port (s) may be predefined (e.g., predefined in 3GPP specifications) or dynamically indicated by DCI, RRC or MAC-CE.
  • the CMR may not be configured in the CSI report configuration.
  • the CMR may be resource (s) of a scheduled PDSCH or DMRS port (s) of the scheduled PDSCH by default.
  • the UE may measure the interference from multiple TRPs, multiple beams or MU-MIMO.
  • a received PDSCH signal of a desired k th cell may be represented as: where y pdsch may be the received PDSCH signal, may be a baseband modulation symbol by applying a precoder on H k MIMO channel, H l P l may be an effective channel of l th cell which introduce an inter-cell interference to the desired k th cell, and a total interference-plus-noise at receiver side may be represented as
  • the interference-plus-noise may be estimated by subtracting the DMRS signal from the received DMRS signal y dmrs as: where may be an effective channel estimated from the DMRS.
  • An interference-plus- noise covariance matrix may be obtained by Diagonal elements of C dmrs may represent interference-plus-noise power per received antenna.
  • the UE may estimate a lump sum interference by subtracting a desired DMRS power from the received power of PDSCH resource.
  • DMRS to PDSCH power offset indicated by RRC, MAC-CE, or DCI may be considered when calculating signal to interference plus noise ratio (SINR) .
  • y pdsch may be the received PDSCH signal
  • y pdsch may be the received PDSCH signal
  • a total interference-plus-noise at receiver side may be represented as while H l P l may be an effective channel of l th cell which introduce an inter-cell interference to the desired k th cell.
  • the interference-plus-noise may be estimated by subtracting the DMRS signal from the received signal y dmrs , as: where ⁇ offset may be a power offset scaling factor between PDSCH and DMRS.
  • the interference-plus-noise may be estimated by:
  • the main difference from and being may include the inter-layer interference and inter-UE interference when other UE (s) is scheduled in the same PDSCH resource.
  • the first IMR may be configured as DMRS port or ZP CSI-RS resource.
  • the interference-plus-noise covariance matrix may be obtained by
  • the network node may indicate DMRS port information through DCI and/or MAC-CE for the interference measurement of the other DMRS port (s) .
  • the PDSCH for the UE is fully overlapped with a co-scheduled UE PDSCH.
  • a DMRS antenna port index of the UE is “2” , which is indicated by an “antenna port” filed in the DCI.
  • an additional IMR is configured in the CSI report configuration for MU-MIMO interference measurement.
  • a DMRS antenna port table is preconfigured for IMR measurement. Then the network node uses the DCI to indicate the DMRS port indices.
  • the DMRS antenna port table is configured by RRC and/or MAC-CE.
  • a DCI value of “6” is indicated to the UE.
  • a received signal from DMRS ports ⁇ 0, 1 ⁇ is respectively represented as:
  • An MU interference covariance is calculated by:
  • the network node may indicate the frequency-domain resources and the DMRS port information for the interference measurement of the other DMRS port (s) .
  • the PDSCH for the UE is non-overlapped with a co-scheduled UE PDSCH.
  • the network node indicates DMRS frequency-domain resources and port information in the DCI to the UE to measure the interference of the co-scheduled UE.
  • a DMRS frequency-domain resource allocation of an interfering UE is indicated by a resource indication value (RIV) , a bitmap or a codepoint table.
  • RIV resource indication value
  • PDSCH resource allocation Type 1 is considered for contiguous resource allocation.
  • the bitmap is used to indicate a set of resource block as shown in FIG. 8 while value ‘0’ represents no interference and value ‘1’ represents sub-carrier interferences caused from the co-scheduled UE.
  • the DMRS frequency-domain resource allocation is indicated by the codepoint table as shown in FIG. 9, an IMR frequency domain allocation set is configured by RRC.
  • the network node dynamically indicates the codepoint through the DCI.
  • the other DMRS port (s) is the remaining DMRS port (s) or the paired DMRS port (s) of a CDM group of the DMRS port (s) of PDSCH.
  • the UE may be indicated a period or multiple slot PDSCH for the CMR measurement or the IMR measurement.
  • the UE may determine results of the CMR measurement or the IMR measurement within the period or within the multiple slot PDSCH in one CSI report.
  • the DCI may include a field to indicate that previous CMR measurement or previous IMR measurement may be used (e.g., combined) for the present CMR measurement or the present IMR measurement.
  • one CSI report may be associated with one PDSCH/DCI, multiple PDSCHs/DCIs or one PDSCH associated with multi-PDSCH scheduling by a DCI.
  • multiple CSI reports (or measurements) for corresponding one or more items of the table of CMR and IMR candidates may be merged or combined into one CSI report to be transmitted.
  • the UE may be triggered to transmit the CSI report by a downlink (DL) DCI or an uplink (UL) DCI (e.g., DCI having format 1_1, DCI having format 1_2, etc. )
  • DL downlink
  • UL uplink
  • the DCI may include at least one of a feedback timing, an UL resource indicator, a CSI association, etc. for the CSI report.
  • the CSI association may indicate which CSI measurement (s) or CSI report (s) needs to be merged or combined.
  • the CSI association includes an identification, and the CSI measurement (s) or CSI report (s) with the same identification are merged or combined.
  • a storage period for the CSI measurement (s) or CSI report may be defined (e.g., predefined based on 3GPP specifications) or indicated in DCI, MAC-CE or RRC configuration.
  • the CSI association includes a bitmap to indicate which CSI measurement (s) or CSI report (s) in a period that needs to be merged or combined.
  • the CSI association includes a flag to indicate whether the last CSI measurement (s) or CSI report (s) with the same CSI report configuration needs to be merged or combined.
  • the UE may be indicated: (1) that the CSI report may be transmitted along with HARQ ACK/NACK in PUCCH, or (2) a CSI report state in the DCI or a higher layer signaling, and then the UE may feedback the CSI report in PUSCH or PUCCH following the CSI report state.
  • At least one of a PMI, a CQI and differential CQIs may be utilized in the CSI report for multiple CSIs.
  • the multiple CSIs could include multiple CQIs.
  • the CQI may correspond to the first of the multiple CSIs and the differential CQIs could be the differences between the CQI and the other CQIs.
  • a frequency granularity of the PMI, the CQI and the differential CQIs may be configured as wideband or subband.
  • multiple CQIs may be determined as one CQI in an event that the multiple CQIs are associated with the same measurement resource or feedback PUCCH or PUSCH resource.
  • the multiple CQIs may be averaged into one CQI or be determined based on the differential CQI values of the first CQI to reduce the feedback size.
  • the UE may feedback lower rank than the rank of PDSCH.
  • the CSI report may be determined based on multiple CSI measurements in multiple transmission time intervals (TTIs) .
  • the received data from PDSCH may be expressed as where is the PDSCH digital precoder, is the data symbol and L pdsch is the number of transmitted layer of this PDSCH.
  • the network node may transmit additional DMRS port (s) on PDSCH for channel measurement.
  • the UE may measure an effective channel on the DMRS port (s) where may be the precoding vectors applied on the additional DMRS port (s) .
  • the UE may obtain CMR channel information HP in normal scenarios.
  • the UE may further update the rank value and the PMI.
  • the network node may indicate the additional DMRS port information through DCI. In some cases, the network node may configure the additional DMRS port information by RRC.
  • a number of additional DMRS port (s) for enhanced scenarios is configured by RRC.
  • the additional DMRS ports are the first two ports of subsequent DMRS port (s) , the remaining DMRS port (s) of the CDM group of the DMRS port (s) of PDSCH or the DMRS port (s) of the paired CDM group of the DMRS port (s) of PDSCH.
  • the grouping rules of DMRS ports may be predefined (e.g., predefined based on 3GPP specifications) or configured by RRC or MAC-CE.
  • FIG. 11 illustrates an example scenario 1100 under schemes in accordance with implementations of the present disclosure.
  • the CSI report configuration is for SU-MIMO CSI.
  • DMRS port (s) is configured as the CSI resource for CMR.
  • CSI-RS resource (s) or DMRS port (s) of PDSCH is configured as the CSI resource for IMR.
  • the network node indicates the DMRS port (s) of PDSCH and additional DMRS port (s) through the DCI.
  • the DMRS ports of PDSCH are and are used for CMR.
  • the UE estimates the channel quality of PDSCH data. Based on DMRS ports ⁇ 1000, 1001, 1002, 1003 ⁇ , the UE estimates the channel quality for up-to-four layers transmission.
  • the UE measures the interference from other network nodes.
  • the UE estimates a lump sum interference by subtracting a desired DMRS power from a received power of PDSCH/DMRS resource.
  • the UE may measure the interference from other network nodes.
  • the UE may estimate a lump sum interference by subtracting a desired DMRS power from a received power of DMRS resource.
  • the UE may be indicated the IMR including other/additional DMRS port (s) (i.e., different DMRS port (s) other than DMRS port of PDSCH) .
  • other/additional DMRS port i.e., different DMRS port (s) other than DMRS port of PDSCH
  • FIG. 12 illustrates an example scenario 1200 under schemes in accordance with implementations of the present disclosure.
  • the CSI report configuration is for MU-MIMO CSI.
  • DMRS port is configured as the CSI resource for CMR.
  • ZP CSI-RS resource or PDSCH resource/DMRS port is configured as the CSI resource for IMR.
  • An additional DMRS port or NZP CSI-RS resource is configured for the interference measurement of other co-scheduled UE (s) .
  • the network node implicitly or explicitly indicates the DMRS port (s) through the DCI for MU-MIMO interference measurement.
  • UE#2 and UE#3 are co-scheduled with the UE.
  • Two-layer and one-layer PDSCH data are respectively transmitted to UE#2 and UE#3 through DMRS ports ⁇ 1004, 1005, 1006 ⁇ .
  • DMRS ports ⁇ 1004, 1005, 1006 ⁇ is indicated for MU-MIMO interference measurement.
  • L MU is the remaining DMRS port number of the CDM group of the DMRS port (s) of PDSCH or the DMRS port number of the paired CDM group of the DMRS port (s) of PDSCH.
  • the DCI includes a field to indicate that the DMRS port (s) for MU-MIMO interference measurement uses the remaining DMRS port (s) of the CDM group of the DMRS port (s) of PDSCH or the DMRS ports of the paired CDM group of the DMRS port (s) of PDSCH.
  • the field further indicates the additional DMRS port (s) for L add .
  • the UE may be indicated the IMR including other/additional DMRS port (s) (i.e., different DMRS port (s) other than DMRS port of PDSCH) .
  • the other DMRS port (s) may be fully overlapped, non-overlapped or partial-overlapped with the DMRS resource of PDSCH for the UE.
  • the network node may indicate the frequency-domain resources and the DMRS port information for the interference measurement of the other DMRS port (s) .
  • the other DMRS port (s) may be the remaining DMRS port (s) or the paired DMRS port (s) of a CDM group of the DMRS port (s) of PDSCH.
  • the UE may be indicated a period or multiple slot PDSCH for the CMR measurement or the IMR measurement.
  • the UE may determine results of the CMR measurement or the IMR measurement within the period or within the multiple slot PDSCH in one CSI report.
  • the DCI may include a field to indicate that previous CMR measurement or previous IMR measurement may be used (e.g., combined) for the present CMR measurement or the present IMR measurement.
  • the CSI report may include: (a) ⁇ CQI ⁇ or (b) ⁇ RI, CQI ⁇ .
  • the RI may not be reported while a CQI may be the only reported quantity.
  • the reported CQI may be implicitly associated with the number of PDSCH layer.
  • the UE reports either ⁇ CQI ⁇ or ⁇ RI, CQI ⁇ depending on which report content represents a best channel capability.
  • the UE may report: (1) either ⁇ CQI ⁇ where the CQI is associated with number of PDSCH layer, or ⁇ RI, CQI ⁇ where the RI is new and updated to the network node; or (2) both ⁇ CQI ⁇ and ⁇ RI, CQI ⁇ .
  • ⁇ CQI ⁇ may be associated with the number of PDSCH layer, which indicates the network node of the signal quality of the PDSCH data.
  • ⁇ RI, CQI ⁇ may indicate the network node of the new RI and the CQI information.
  • the CSI report may be configured by RRC and/or MAC-CE or indicated by DCI.
  • the UE may select at least one DMRS port (e.g., one beam) index by reporting a port selection PMI.
  • This PMI may include the port selection and/or port ordering information.
  • the CSI report includes ⁇ RI, PMI, CQI ⁇ where the PMI includes the port selection and port ordering information.
  • the port selection PMI [e 1, 1 e 3, 2 e 2, 3 ] is reported by the UE.
  • W (RI) is the reported PMI.
  • the PMI may provide at least one of the port selection, port ordering and codeword to layer mapping information to the network node.
  • the PMI may include the port selection information and/or beam group selection information in an event that the network node transmits several beam groups on the DMRS port (s) .
  • the CSI report includes ⁇ RI, PMI, CQI ⁇ where the PMI includes the port selection and beam group information.
  • the network node determines to transmit at least two groups DMRS port (s) for the UE to measure. Different groups correspond to different beam directions. Based on performing the DMRS measurement, the UE selects a preferred port group.
  • the DMRS port (s) of a first beam group is the DMRS port (s) of PDSCH.
  • the DMRS port (s) of a second beam group is (1) the remaining DMRS port (s) of the CDM group of the DMRS port (s) of PDSCH or (2) the DMRS port (s) of the paired CDM group of the DMRS port (s) of PDSCH.
  • grouping rules of DMRS ports may be predefined (e.g., predefined based on 3GPP specifications) or configured by RRC or MAC-CE.
  • W (RI) is the reported PMI.
  • the UE may select the beam group and port by report the PMI W (RI) .
  • the PMI may provide at least one of the port selection, port ordering, beam group, and codeword to layer mapping information to the network node.
  • the PMI may include a normal PMI such as 3GPP specification NR release 15 Type I PMI, 3GPP specification NR release 16 Type II, etc.
  • the PMI may include the port selection information and/or additional coefficients/co-phasing information.
  • the additional coefficients/co-phasing information may be used while the network node applies additional precoding on the DMRS port (s) .
  • the UE measures an effective channel from DMRS.
  • the effective channel is represented as: where is a DMRS precoder.
  • the UE derives a right eigenvector V of the effective channel by performing singular value decomposition (SVD) operation.
  • the UE reports RI ⁇ L pdsch as additional coefficients for PMI tracking.
  • the UE reports V ⁇ C L ⁇ RI , RI ⁇ L as additional coefficients for PMI tracking.
  • the UE may report: (1) either ⁇ CQI ⁇ where CQI is associated with the number of PDSCH layer, or ⁇ RI, PMI, CQI ⁇ depending on which report content includes the best channel capability or (2) both ⁇ CQI ⁇ and ⁇ RI, PMI, CQI ⁇ .
  • the CSI report may include ⁇ PMI, CQI ⁇ without RI.
  • the reported ⁇ PMI, CQI ⁇ may be implicitly associated with the number of PDSCH layer.
  • ⁇ CQI ⁇ may be associated with the number of PDSCH layer, which indicates the network node the signal quality of the PDSCH data.
  • the CSI report may be configured by RRC and/or MAC-CE or indicated by DCI.
  • the UE may be explicitly indicated which DMRS port (s) , DMRS symbol (s) , DMRS CDM group (s) need to be considered in the used rate matching pattern of PDSCH by RRC, MAC-CE, or DCI.
  • FIG. 13 illustrates an example communication system 1300 having an example communication apparatus 1310 and an example network apparatus 1320 in accordance with an implementation of the present disclosure.
  • Each of communication apparatus 1310 and network apparatus 1320 may perform various functions to implement schemes, techniques, processes and methods described herein pertaining to CSI measurement with respect to UE and network apparatus in mobile communications, including scenarios/schemes described above as well as processes 1400 and 1500 described below.
  • Communication apparatus 1310 may be a part of an electronic apparatus, which may be a UE such as a portable or mobile apparatus, a wearable apparatus, a wireless communication apparatus or a computing apparatus.
  • communication apparatus 1310 may be implemented in a smartphone, a smartwatch, a personal digital assistant, a digital camera, or a computing equipment such as a tablet computer, a laptop computer or a notebook computer.
  • Communication apparatus 1310 may also be a part of a machine type apparatus, which may be an IoT, NB-IoT, or IIoT apparatus such as an immobile or a stationary apparatus, a home apparatus, a wire communication apparatus or a computing apparatus.
  • communication apparatus 1310 may be implemented in a smart thermostat, a smart fridge, a smart door lock, a wireless speaker or a home control center.
  • communication apparatus 1310 may be implemented in the form of one or more integrated-circuit (IC) chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, one or more reduced-instruction set computing (RISC) processors, or one or more complex-instruction-set-computing (CISC) processors.
  • IC integrated-circuit
  • RISC reduced-instruction set computing
  • CISC complex-instruction-set-computing
  • Communication apparatus 1310 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of communication apparatus 1310 are neither shown in FIG. 13 nor described below in the interest of simplicity and brevity.
  • other components e.g., internal power supply, display device and/or user interface device
  • Network apparatus 1320 may be a part of a network apparatus, which may be a network node such as a satellite, a base station, a small cell, a router or a gateway.
  • network apparatus 1320 may be implemented in an eNodeB in an LTE network, in a gNB in a 5G/NR, IoT, NB-IoT or IIoT network or in a satellite or base station in a 6G network.
  • network apparatus 1320 may be implemented in the form of one or more IC chips such as, for example and without limitation, one or more single-core processors, one or more multi-core processors, or one or more RISC or CISC processors.
  • Network apparatus 1320 may include at least some of those components shown in FIG.
  • Network apparatus 1320 may further include one or more other components not pertinent to the proposed scheme of the present disclosure (e.g., internal power supply, display device and/or user interface device) , and, thus, such component (s) of network apparatus 1320 are neither shown in FIG. 13 nor described below in the interest of simplicity and brevity.
  • components not pertinent to the proposed scheme of the present disclosure e.g., internal power supply, display device and/or user interface device
  • process 1400 may involve processor 1312 of communication apparatus 1310 transmitting the CSI report.
  • the DCI may include at least one field to indicate at least one of a time-domain resource, a frequency-domain resource and a port information of the at least one of the CMR and the IMR.
  • the time-domain resource or the frequency-domain resource of the at least one of the CMR and the IMR is associated with a time-domain resource and a frequency-domain resource of a PDSCH scheduled by the DCI.
  • the at least one field may include at least one codepoint associated with at least one table of the time-domain resource, the frequency-domain resource and the port information of the at least one of the CMR and the IMR.
  • the DCI may include a field to indicate whether a specific DCI and at least one of another CMR and another IMR corresponding to the specific DCI are used for joint channel measurement or interference measurement.
  • the specific DCI and the at least one of another CMR and another IMR corresponding to the specific DC may be transmitted in a predefined time window or a radio resource control (RRC) configured time window.
  • RRC radio resource control
  • the DCI and the specific DCI may trigger a joint CSI report based on corresponding individual measurement results and joint measurement results.
  • the DCI may include at least one field including at least one codepoint associated with at least one table of CMR and IMR candidates, and the at least one codepoint indicates the at least one of the CMR and the IMR.
  • the CSI report may include multiple CSI for corresponding one or more items of the at least one table of CMR and IMR candidates.
  • the CSI report may include at least one of an RI, a PMI and a CQI.
  • the PMI may include at least one of information of coefficients and co-phasing, a port selection and a port ordering information which is associated with the RI.
  • the port selection information may include a selected precoded RS port or at least one group index of at least one DMRS port.

Landscapes

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

Abstract

L'invention concerne diverses solutions de mesure d'informations d'état de canal (CSI) par rapport à un appareil dans des communications mobiles. L'appareil peut recevoir des informations de commande de liaison descendante (DCI). Les DCI peuvent indiquer une ressource de mesure de canal (CMR) et/ou une ressource de mesure d'interférence (IMR) sur la base d'un ensemble de ressources de signal de référence (RS). L'ensemble de ressources RS peut comprendre un ensemble de ressources CSI-RS et/ou un ensemble de ressources de signal de référence de démodulation (DMRS) et/ou un ensemble de ressources de canal physique partagé de liaison descendante (PDSCH). L'appareil peut mesurer la CMR et l'IMR pour déterminer un rapport de CSI. L'appareil peut transmettre le rapport de CSI.
PCT/CN2025/072907 2024-01-17 2025-01-17 Procédés et appareil de mesure d'informations d'état de canal dans des communications mobiles Pending WO2025153039A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202421003398 2024-01-17
IN202421003398 2024-01-17

Publications (1)

Publication Number Publication Date
WO2025153039A1 true WO2025153039A1 (fr) 2025-07-24

Family

ID=96470791

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2025/072907 Pending WO2025153039A1 (fr) 2024-01-17 2025-01-17 Procédés et appareil de mesure d'informations d'état de canal dans des communications mobiles

Country Status (1)

Country Link
WO (1) WO2025153039A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200145866A1 (en) * 2018-11-02 2020-05-07 Samsung Electronics Co., Ltd. Method and apparatus for channel and interference measurement and reporting
US20200220631A1 (en) * 2019-01-03 2020-07-09 Samsung Electronics Co., Ltd. Method and apparatus for interference measurement
US20220232407A1 (en) * 2021-01-15 2022-07-21 Samsung Electronics Co., Ltd. Method and apparatus for channel and interference measurement
EP4145892A1 (fr) * 2020-04-30 2023-03-08 Ntt Docomo, Inc. Terminal, procédé de communication sans fil et station de base
WO2023028738A1 (fr) * 2021-08-30 2023-03-09 Apple Inc. Systèmes et procédés de mesure de csi reposant sur pdsch
US20230180034A1 (en) * 2020-07-30 2023-06-08 Huawei Technologies Co., Ltd. System and Method for Coordinated Transmissions and Feedback

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200145866A1 (en) * 2018-11-02 2020-05-07 Samsung Electronics Co., Ltd. Method and apparatus for channel and interference measurement and reporting
US20200220631A1 (en) * 2019-01-03 2020-07-09 Samsung Electronics Co., Ltd. Method and apparatus for interference measurement
EP4145892A1 (fr) * 2020-04-30 2023-03-08 Ntt Docomo, Inc. Terminal, procédé de communication sans fil et station de base
US20230180034A1 (en) * 2020-07-30 2023-06-08 Huawei Technologies Co., Ltd. System and Method for Coordinated Transmissions and Feedback
US20220232407A1 (en) * 2021-01-15 2022-07-21 Samsung Electronics Co., Ltd. Method and apparatus for channel and interference measurement
WO2023028738A1 (fr) * 2021-08-30 2023-03-09 Apple Inc. Systèmes et procédés de mesure de csi reposant sur pdsch

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "Channel and interference measurement for CSI acquisition", 3GPP DRAFT; R1-1706927, vol. RAN WG1, 6 May 2017 (2017-05-06), Hangzhou, China, pages 1 - 12, XP051261584 *
NTT DOCOMO, INC.: "Views on CSI measurement for NR", 3GPP DRAFT; R1-1718190_CSI_MEASUREMENT, vol. RAN WG1, 3 October 2017 (2017-10-03), Prague, CZ, pages 1 - 14, XP051352898 *

Similar Documents

Publication Publication Date Title
US9961582B2 (en) Configuration of coordinated multipoint transmission hypotheses for channel state information reporting
US10420090B2 (en) Communication technique using CSI-RS in mobile communication system
US9660784B2 (en) Method and apparatus providing inter-transmission point phase relationship feedback for joint transmission CoMP
US20180241454A1 (en) Channel state information feedback method and apparatus
US10149306B2 (en) Methods and apparatus for precoding control in a wireless communication network
US11563467B2 (en) Precoding-matched CSI feedback in mobile communications
US20240097762A1 (en) Method and apparatus for channel state information reporting
US9198072B2 (en) Calculating and reporting channel characteristics
WO2017194010A1 (fr) Procédé et dispositif de transmission d'informations pilotes, et procédé et dispositif de réception d'informations pilotes
US11290906B2 (en) Channel measurement method
US10419098B2 (en) Methods and apparatus for precoding control in a wireless communication network
US9048970B1 (en) Feedback for cooperative multipoint transmission systems
CN110504999A (zh) 通信方法、终端设备和网络设备
WO2025153039A1 (fr) Procédés et appareil de mesure d'informations d'état de canal dans des communications mobiles
US20250071742A1 (en) Method and apparatus for channel information feedback with prior information in mobile communications
WO2025112928A1 (fr) Procédé et appareil de rapport d'informations de canal dans des communications mobiles
WO2025247327A1 (fr) Procédés de mesurage d'informations d'état de canal dans des communications mobiles
US12500629B2 (en) Method and apparatus for tiered channel state information feedback in mobile communications
WO2025195210A1 (fr) Procédé et dispositif de transmission d'informations sur l'état d'un canal dans des communications mobiles
WO2025050954A1 (fr) Procédé et appareil de rétroaction d'informations de canal avec des informations de blanchiment dans des communications mobiles
US20250380167A1 (en) Methods for reverse ue-ue cli measurement in non-overlapping subband-fullduplex deployment
WO2026021083A1 (fr) Procédés et appareil de configuration et de génération de rapport d'informations d'état de canal
WO2024245377A1 (fr) Procédé et appareil pour déterminer un précodeur de liaison descendante avec une base non orthogonale dans des communications mobiles
WO2023179559A1 (fr) Procédé et appareil de rétroaction d'informations de canal dans des communications mobiles
WO2025148199A1 (fr) Procédés et appareil de réduction d'interférence de liaison croisée dans des communications mobiles

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 25741603

Country of ref document: EP

Kind code of ref document: A1