WO2023021701A1 - 端末、無線通信方法及び基地局 - Google Patents
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Definitions
- the present disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
- LTE Long Term Evolution
- 3GPP Rel. 10-14 LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- LTE successor systems for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later
- 5G 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- the UE can use one of multiple panels (multiple beams) for uplink (UL) transmission. Also, Rel. 18 and later, in order to improve UL throughput/reliability, support for simultaneous UL transmission using multiple panels toward one or more transmission/reception points (TRP) is being considered.
- TRP transmission/reception points
- simultaneous UL transmission using multiple panels has not been fully considered. If simultaneous UL transmission using multiple panels is not properly performed, system performance, such as reduced throughput, may be degraded.
- one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately perform simultaneous UL transmission using multiple panels.
- a terminal when UL transmission using multiple panels including at least a first panel and a second panel is supported, at least one of UL channels and UL signals that overlap in the time domain
- a control unit that performs the drop or mapping on a panel-by-panel basis and determines a first UL transmission corresponding to the first panel and a second UL transmission corresponding to the second panel;
- a transmitting unit that performs at least one transmission of the first UL transmission and the second UL transmission , has
- simultaneous UL transmission using multiple panels can be performed appropriately.
- FIG. 1 is a diagram showing an example of association between precoder types and TPMI indexes.
- 2A-2C are diagrams illustrating an example of PUSCH transmission using multiple panels.
- 3A and 3B are diagrams illustrating an example of UL transmission control based on priority.
- FIG. 4 is a diagram illustrating another example of UL transmission control based on priority.
- 5A-5C are diagrams showing examples of schemes 1 to 3 of simultaneous UL transmission using multiple panels.
- 6A and 6B are diagrams illustrating an example of multi-panel UL simultaneous transmission.
- FIG. 7 is a diagram illustrating an example of simultaneous transmission of PUCCH and PUSCH according to the first embodiment.
- FIG. 8 is a diagram illustrating an example of simultaneous transmission of SRS and PUCCH/PUSCH according to the second embodiment.
- FIG. 9 is a diagram illustrating an example of simultaneous transmission of multiple SRSs according to the third embodiment.
- FIG. 10 is a diagram illustrating an example of a schematic configuration of a radio communication system according to an embodiment.
- FIG. 11 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- FIG. 12 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
- FIG. 13 is a diagram illustrating an example of hardware configurations of a base station and user terminals according to an embodiment.
- PUSCH precoder In NR, it is considered that the UE supports Codebook (CB) and/or Non-Codebook (NCB) based transmission.
- CB Codebook
- NCB Non-Codebook
- the UE uses at least a measurement reference signal (SRS) resource indicator (SRS Resource Indicator (SRI)), at least one of the CB-based and NCB-based physical uplink shared channel (PUSCH )) to determine the precoder (precoding matrix) for transmission.
- SRS measurement reference signal
- SRI SRS Resource Indicator
- PUSCH physical uplink shared channel
- the UE determines the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI), Transmitted Precoding Matrix Indicator (TPMI), etc. You may The UE may determine the precoder for PUSCH transmission based on the SRI for NCB-based transmission.
- SRI Transmitted Rank Indicator
- TRI Transmitted Rank Indicator
- TPMI Transmitted Precoding Matrix Indicator
- SRI, TRI, TPMI, etc. may be notified to the UE using downlink control information (DCI).
- DCI downlink control information
- the SRI may be specified by the SRS Resource Indicator field (SRI field) of the DCI, or specified by the parameter "srs-ResourceIndicator” included in the RRC information element "Configured GrantConfig" of the configured grant PUSCH.
- SRI field SRS Resource Indicator field
- SR SRI field
- the UE may report UE capability information regarding the precoder type, and the base station may configure the precoder type based on the UE capability information through higher layer signaling.
- the UE capability information may be precoder type information (which may be represented by the RRC parameter “pusch-TransCoherence”) that the UE uses in PUSCH transmission.
- higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- MAC CE MAC Control Element
- PDU MAC Protocol Data Unit
- the broadcast information may be, for example, a master information block (MIB), a system information block (SIB), or the like.
- the UE is based on the precoder type information (which may be represented by the RRC parameter "codebookSubset") included in the PUSCH configuration information ("PUSCH-Config" information element of RRC signaling) notified by higher layer signaling, A precoder to be used for PUSCH transmission may be determined.
- the UE may be configured with the subset of PMI specified by TPMI by codebookSubset.
- the precoder type is either full coherent, fully coherent, coherent, partial coherent, non coherent, or a combination of at least two of these (for example, “complete and fullyAndPartialAndNonCoherent”, “partialAndNonCoherent”, etc.).
- Perfect coherence may mean that all antenna ports used for transmission are synchronized (it may be expressed as being able to match the phase, applying the same precoder, etc.). Partial coherence may mean that some of the antenna ports used for transmission are synchronized, but some of the antenna ports are not synchronized with other ports. Non-coherent may mean that each antenna port used for transmission is not synchronized.
- a UE that supports fully coherent precoder types may be assumed to support partially coherent and non-coherent precoder types.
- a UE that supports a partially coherent precoder type may be assumed to support a non-coherent precoder type.
- the precoder type may be read as coherency, PUSCH transmission coherence, coherence type, coherence type, codebook type, codebook subset, codebook subset type, or the like.
- the UE obtains the TPMI index from the DCI (e.g., DCI format 0_1, etc.) that schedules the UL transmission from multiple precoders (which may be referred to as precoding matrices, codebooks, etc.) for CB-based transmissions. may determine a precoding matrix corresponding to .
- DCI e.g., DCI format 0_1, etc.
- precoders which may be referred to as precoding matrices, codebooks, etc.
- FIG. 1 is a diagram showing an example of association between precoder types and TPMI indexes.
- FIG. 1 is a table of precoding matrix W for single layer (rank 1) transmission using 4 antenna ports in DFT-s-OFDM (Discrete Fourier Transform spread OFDM, transform precoding is enabled) correspond to
- the UE is notified of any TPMI from 0 to 27 for single layer transmission. Also, if the precoder type is partialAndNonCoherent, the UE is configured with any TPMI from 0 to 11 for single layer transmission. If the precoder type is nonCoherent, the UE is set to any TPMI from 0 to 3 for single layer transmission.
- a precoding matrix in which only one component in each column is not 0 may be called a noncoherent codebook.
- a precoding matrix in which a predetermined number (but not all) of the entries in each column are non-zero may be referred to as a partially coherent codebook.
- a precoding matrix whose elements in each column are not all zeros may be called a fully coherent codebook.
- Non-coherent codebooks and partially coherent codebooks may be called antenna selection precoders.
- a fully coherent codebook may be referred to as a non-antenna selection precoder.
- RRC parameter “codebookSubset” “partialAndNonCoherent”.
- the UE receives information (SRS configuration information, for example, parameters in "SRS-Config" of the RRC control element) used for transmission of measurement reference signals (for example, Sounding Reference Signal (SRS)))
- SRS configuration information for example, parameters in "SRS-Config" of the RRC control element
- SRS Sounding Reference Signal
- the UE receives information on one or more SRS resource sets (SRS resource set information, e.g., "SRS-ResourceSet” of the RRC control element) and information on one or more SRS resources (SRS resource information, eg, "SRS-Resource” of the RRC control element).
- SRS resource set information e.g., "SRS-ResourceSet” of the RRC control element
- SRS resource information e.g. "SRS-Resource” of the RRC control element
- One SRS resource set may be associated with a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped together).
- Each SRS resource may be identified by an SRS resource indicator (SRI) or an SRS resource ID (Identifier).
- the SRS resource set information may include an SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, an SRS resource type, and SRS usage information.
- SRS-ResourceSetId SRS resource set ID
- SRS-ResourceId SRS resource set ID
- SRS resource type SRS resource type
- SRS usage information SRS usage information
- the SRS resource types are periodic SRS (P-SRS), semi-persistent SRS (SP-SRS), aperiodic SRS (A-SRS, AP -SRS)).
- P-SRS periodic SRS
- SP-SRS semi-persistent SRS
- A-SRS aperiodic SRS
- AP -SRS aperiodic SRS
- the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation) and transmit A-SRS based on DCI's SRS request.
- the usage is, for example, beam management (beamManagement), codebook-based transmission (codebook: CB), non-codebook-based transmission (nonCodebook: NCB), antenna switching, and the like.
- the SRS for codebook-based or non-codebook-based transmission applications may be used to determine the precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.
- the UE determines the precoder for PUSCH transmission based on SRI, Transmitted Rank Indicator (TRI) and Transmitted Precoding Matrix Indicator (TPMI). You may The UE may determine the precoder for PUSCH transmission based on the SRI for non-codebook-based transmission.
- TRI Transmitted Rank Indicator
- TPMI Transmitted Precoding Matrix Indicator
- SRS resource information includes SRS resource ID (SRS-ResourceId), SRS port number, SRS port number, transmission Comb, SRS resource mapping (eg, time and/or frequency resource position, resource offset, resource period, repetition number, SRS number of symbols, SRS bandwidth, etc.), hopping related information, SRS resource type, sequence ID, spatial relationship information of SRS, and so on.
- the spatial relationship information of the SRS may indicate spatial relationship information between a given reference signal and the SRS.
- the predetermined reference signal includes a Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block, a Channel State Information Reference Signal (CSI-RS) and an SRS (for example, another SRS) may be at least one of An SS/PBCH block may be referred to as a Synchronization Signal Block (SSB).
- SS/PBCH Synchronization Signal/Physical Broadcast Channel
- CSI-RS Channel State Information Reference Signal
- SRS for example, another SRS
- SSB Synchronization Signal Block
- the SRS spatial relationship information may include at least one of the SSB index, CSI-RS resource ID, and SRS resource ID as the index of the predetermined reference signal.
- the SSB index, SSB resource ID and SSBRI may be read interchangeably.
- the CSI-RS index, CSI-RS resource ID and CRI may be read interchangeably.
- the SRS index, the SRS resource ID, and the SRI may be read interchangeably.
- the spatial relationship information of the SRS may include the serving cell index, BWP index (BWP ID), etc. corresponding to the predetermined reference signal.
- BC is, for example, a node (e.g., base station or UE) determines the beam (transmission beam, Tx beam) used for signal transmission based on the beam (reception beam, Rx beam) used for signal reception. It may be the ability to
- BC is Tx/Rx beam correspondence, beam reciprocity, beam calibration, calibrated/non-calibrated, reciprocity calibration It may also be called reciprocity calibrated/non-calibrated, degree of correspondence, degree of agreement, and the like.
- the UE uses the same beam (spatial domain transmit filter) as the SRS (or SRS resources) indicated by the base station based on the measurement results of one or more SRS (or SRS resources) , may transmit uplink signals (eg, PUSCH, PUCCH, SRS, etc.).
- uplink signals eg, PUSCH, PUCCH, SRS, etc.
- the UE uses the same or corresponding beam (spatial domain transmit filter) as the beam (spatial domain receive filter) used for receiving a given SSB or CSI-RS (or CSI-RS resource) may transmit uplink signals (for example, PUSCH, PUCCH, SRS, etc.).
- the beam spatial domain receive filter
- uplink signals for example, PUSCH, PUCCH, SRS, etc.
- the spatial domain for reception of the SSB or CSI-RS may be transmitted using the same spatial domain filter (spatial domain transmit filter) as the filter (spatial domain receive filter).
- the UE may assume that the UE receive beam for SSB or CSI-RS and the UE transmit beam for SRS are the same.
- target SRS For a given SRS (target SRS) resource, if the UE is configured with spatial relationship information about another SRS (reference SRS) and the given SRS (target SRS) (for example, without BC), the given reference SRS
- the target SRS resources may be transmitted using the same spatial domain filter (spatial domain transmit filter) as for the transmission of . That is, in this case, the UE may assume that the UE transmission beam of the reference SRS and the UE transmission beam of the target SRS are the same.
- the UE may determine the spatial relationship of PUSCHs scheduled by the DCI based on the value of a predetermined field (eg, SRS resource identifier (SRI) field) within the DCI (eg, DCI format 0_1). Specifically, the UE may use the spatial relationship information (eg, “spatialRelationInfo” of the RRC information element) of the SRS resource determined based on the value of the predetermined field (eg, SRI) for PUSCH transmission.
- a predetermined field eg, SRS resource identifier (SRI) field
- SRI spatialRelationInfo
- the UE when using codebook-based transmission, the UE may be configured with two SRS resources by RRC and indicated one of the two SRS resources by DCI (a 1-bit predetermined field).
- the UE when using non-codebook based transmission, the UE may be configured with 4 SRS resources by RRC and one of the 4 SRS resources may be indicated by DCI (a 2-bit predefined field).
- DCI Downlink Control Channel
- DL-RS can be configured for the spatial relationship of SRS resources used for PUSCH.
- the UE can be configured by RRC for the spatial relationship of multiple (eg, up to 16) SRS resources and directed to one of the multiple SRS resources by MAC CE.
- reception by one TRP with multiple panels (Fig. 2B) or reception by two TRPs with ideal backhaul (Fig. 2C) are considered.
- a single PDCCH for scheduling multiple PUSCHs (eg, simultaneous transmission of PUSCH#1 and PUSCH#2) is being considered. It is being considered that panel-specific transmission will be supported and a panel ID will be introduced.
- the base station may use the UL TCI or panel ID to set or indicate panel-specific transmission for UL transmission.
- UL TCI (UL TCI state) is Rel. It may be based on signaling similar to the DL beam indication supported in X.15.
- the panel ID may be implicitly or explicitly applied to the transmission of the target RS resource or target RS resource set and/or PUCCH, SRS and PRACH. When the panel ID is explicitly notified, the panel ID may be set in at least one of the target RS, target channel, and reference RS (for example, DL RS resource setting or spatial relationship information).
- UL TCI state (UL TCI state) Rel.
- UL TCI status signaling is similar to UE DL beam (DL TCI status) signaling. Note that the DL TCI state may be interchanged with the TCI state for PDCCH/PDSCH.
- Channels/signals (which may be called target channels/RSs) for which the UL TCI state is set (specified) are, for example, PUSCH (DMRS of PUSCH), PUCCH (DMRS of PUCCH), random access channel (Physical Random Access Channel (PRACH)), SRS, etc. may be at least one.
- PUSCH DMRS of PUSCH
- PUCCH DMRS of PUCCH
- PRACH Physical Random Access Channel
- SRS Physical Random Access Channel
- the RS (source RS) that has a QCL relationship with the channel/signal may be, for example, a DL RS (eg, SSB, CSI-RS, TRS, etc.), or a UL RS (eg, SRS, beam management SRS, etc.) may be used.
- a DL RS eg, SSB, CSI-RS, TRS, etc.
- a UL RS eg, SRS, beam management SRS, etc.
- an RS that has a QCL relationship with that channel/signal may be associated with a panel ID for receiving or transmitting that RS.
- the association may be explicitly set (or designated) by higher layer signaling (for example, RRC signaling, MAC CE, etc.), or may be determined implicitly.
- the correspondence between RSs and panel IDs may be included and set in the UL TCI state information, or may be included and set in at least one of the RS's resource setting information, spatial relationship information, and the like.
- the QCL type indicated by the UL TCI state may be the existing QCL types A to D, or other QCL types, and may indicate a predetermined spatial relationship, associated antenna port (port index), etc. may contain.
- the UE For UL transmission, if the UE is specified with the relevant panel ID (eg, specified by DCI), the UE may use the panel corresponding to the panel ID to perform the UL transmission.
- a Panel ID may be associated with a UL TCI state, and the UE, when assigned (or activated) with a UL TCI state for a given UL channel/signal, will configure that UL channel according to the Panel ID associated with that UL TCI state. / You may specify the panel to use for signaling.
- Traffic types may be identified at the physical layer based on at least one of the following: Logical channels with different priorities Modulation and Coding Scheme (MCS) table (MCS index table) ⁇ Channel Quality Indication (CQI) table ⁇ DCI format ⁇ Used to scramble (mask) cyclic redundancy check (CRC) bits included in (added to) the relevant DCI (DCI format) (Radio Network Temporary Identifier (RNTI: System Information-Radio Network Temporary Identifier)) ⁇ RRC (Radio Resource Control) parameters ⁇ Specific RNTI (for example, RNTI for URLLC, MCS-C-RNTI, etc.) - Search Space - Predetermined fields in the DCI (e.g. newly added fields or re-use of existing fields)
- MCS Modulation and Coding Scheme
- CQI Channel Quality Indication
- DCI format ⁇ Used to scramble (mask) cyclic redundancy check (CRC) bits included in (added to) the relevant D
- the HARQ-ACK traffic type for PDSCH may be determined based on at least one of the following.
- An MCS index table for example, MCS index table 3 whether to use - RNTI used for CRC scrambling of DCI used for scheduling of the PDSCH (for example, whether CRC scrambled with C-RNTI or MCS-C-RNTI)
- the SR traffic type may be determined based on a higher layer parameter used as the SR identifier (SR-ID).
- the higher layer parameter may indicate whether the traffic type of the SR is eMBB or URLLC.
- the CSI traffic type may be determined based on configuration information (CSIreportSetting) related to CSI reporting, a DCI type used for triggering, a DCI transmission parameter, or the like.
- the configuration information, DCI type, etc. may indicate whether the traffic type of the CSI is eMBB or URLLC.
- the configuration information may be an upper layer parameter.
- the PUSCH traffic type may be determined based on at least one of the following.
- An MCS index table used for determining at least one of the PUSCH modulation order, target coding rate, and TBS (for example, whether to use MCS index table 3)
- - RNTI used for CRC scrambling of DCI used for scheduling the PUSCH (for example, whether CRC scrambled with C-RNTI or MCS-C-RNTI)
- Traffic types may be associated with communication requirements (requirements such as delay and error rate), data types (voice, data, etc.).
- the difference between URLLC requirements and eMBB requirements may be that the latency of URLLC is smaller than that of eMBB, or that URLLC requirements include reliability requirements.
- eMBB user (U)-plane delay requirements may include a downlink U-plane delay of 4 ms and an uplink U-plane delay of 4 ms.
- the URLLC U-plane delay requirements may include a downlink U-plane delay of 0.5 ms and an uplink U-plane delay of 0.5 ms.
- URLLC reliability requirements may also include a 32-byte error rate of 10 ⁇ 5 at 1 ms U-plane delay.
- NR 16 Priority setting
- multiple levels eg, two levels
- signals corresponding to different traffic types also called services, service types, communication types, use cases, etc.
- different priorities are set for each channel to control communication (e.g., transmission control at the time of collision, etc.) It is assumed that This makes it possible to control communication by setting different priorities for the same signal or channel according to the service type or the like.
- the priority is signal (eg, UCI such as HARQ-ACK, reference signal, etc.), channel (PDSCH, PUSCH, PUCCH, etc.), reference signal (eg, channel state information (CSI), sounding reference signal (SRS), etc.). , scheduling request (SR), and/or HARQ-ACK codebook. Also, priority may be set for each of the PUCCH used for SR transmission, the PUCCH used for HARQ-ACK transmission, and the PUCCH used for CSI transmission.
- the priority may be defined as a first priority (eg high) and a second priority lower than the first priority (eg low). Alternatively, three or more types of priorities may be set.
- priority may be set for HARQ-ACK for dynamically scheduled PDSCH, HARQ-ACK for semi-persistent PDSCH (SPS PDSCH), and HARQ-ACK for SPS PDSCH release.
- priority may be set for the HARQ-ACK codebooks corresponding to these HARQ-ACKs.
- the priority of the PDSCH may be read as the priority of the HARQ-ACK for the PDSCH.
- priority may be set for dynamic grant-based PUSCH, configuration grant-based PUSCH, and the like.
- Information on priority may be notified from the base station to the UE using at least one of higher layer signaling and DCI.
- the scheduling request priority may be set with a higher layer parameter (eg, schedulingRequestPriority).
- the priority of HARQ-ACK for a DCI-scheduled PDSCH (eg, dynamic PDSCH) may be signaled in that DCI.
- the priority of HARQ-ACK for SPS PDSCH may be set by an upper parameter (for example, HARQ-ACK-Codebook-indicator-forSPS), or may be notified by DCI that instructs activation of SPS PDSCH.
- a predetermined priority (eg, low) may be set for P-CSI/SP-CSI transmitted on the PUCCH.
- A-CSI/SP-CSI transmitted on PUSCH may be notified of priority by DCI (for example, DCI for triggering or DCI for activation).
- the priority of the dynamic grant-based PUSCH may be notified in the DCI that schedules the PUSCH.
- the configuration grant-based PUSCH priority may be configured with a higher layer parameter (eg, priority).
- P-SRS/SP-SRS, A-SRS triggered by DCI eg, DCI format 0_1/DCI format 2_3
- a predetermined priority eg, low
- the UE may control UL transmission based on priority when multiple UL signals/UL channels overlap (or collide).
- a time resource may be read as the time domain or the time domain. Time resources may be in units of symbols, slots, subslots, or subframes.
- Multiple UL signals/UL channels overlapping in the same UE means that multiple UL signals/UL channels overlap at least in the same time resources (e.g. symbols).
- colliding UL signals/UL channels in different UEs may result in multiple UL signals/UL channels overrunning on the same time resources (e.g., symbols) and frequency resources (e.g., RBs). It may also mean to wrap.
- the UE controls the multiplexing of the multiple UL signals/UL channels to one UL channel for transmission ( See Figure 3A).
- HARQ-ACK (or PUCCH for HARQ-ACK transmission) set with the first priority (high) and UL data/UL-SCH set with the first priority (high) (or PUSCH for UL data/UL-SCH transmission) overlap.
- the UE multiplexes (or maps) HARQ-ACK to PUSCH and transmits both UL data and HARQ-ACK.
- the UE When multiple UL signals/UL channels with different priorities overlap, the UE performs UL transmissions with higher priority (e.g., prioritizing UL transmissions with higher priority) and UL transmissions with lower priority. It may be controlled so as not to exist (for example, drop) (see FIG. 3B).
- higher priority e.g., prioritizing UL transmissions with higher priority
- UL transmissions with lower priority It may be controlled so as not to exist (for example, drop) (see FIG. 3B).
- the first priority (high) is set UL data / HARQ-ACK (or UL data / UL channel for HARQ-ACK transmission) and the second priority (low) is set UL data/HARQ-ACK (or UL channel for UL data/HARQ-ACK transmission) overlap.
- the UE controls to drop UL data/HARQ-ACK with low priority and prioritize transmission of UL data/HARQ-ACK with high priority.
- the UE may change (eg, postpone or shift) the transmission timing of UL transmissions with lower priority.
- the transmission may be controlled by two steps (see Figure 4).
- step 1 one UL channel is selected for multiplexing UL signals respectively transmitted in UL transmissions with the same priority.
- SR having the first priority (high) (or PUCCH for SR transmission) and HARQ-ACK (or PUCCH for HARQ-ACK transmission) are predetermined UL channels (here, HARQ - PUCCH for ACK transmission).
- HARQ-ACK with the second priority (low) (or PUCCH for HARQ-ACK transmission) and data is a predetermined UL channel (here Then, it may be multiplexed to PUSCH).
- step 2 among UL transmissions with different priorities, UL transmission with higher priority may be preferentially transmitted and UL transmission with lower priority may be dropped.
- SR having the first priority (high) and PUCCH for HARQ-ACK transmission are preferentially transmitted, and HARQ-ACK having the second priority (low) and PUSCH for data transmission are May be dropped.
- the UE can resolve collisions between multiple UL transmissions with the same priority according to step 1 and resolve conflicts between multiple UL transmissions with different priorities according to step 2.
- PUCCH resources e.g., PUCCH for SR
- UCI e.g., HARQ-ACK
- the PUCCH using the PUCCH resource You may send.
- the UE may multiplex (map/piggyback) the HARQ-ACK information/CSI report onto the PUSCH when the PUCCH resource temporally overlaps with the PUSCH transmission. At this time, the UE may not send the SR.
- the UE does not have to transmit PUSCH that temporally overlaps with PUCCH within the slot.
- the UE selects one PUCCH after performing UCI multiplexing. If the one PUCCH temporally overlaps with PUSCH, collision handling between PUCCH and PUSCH is performed.
- PUSCH transmission with a priority index of "1" or PUCCH transmission with a priority index of "1" (PUCCH transmission with a priority index 1) and SRS transmission are temporally If so, the UE does not transmit SRS on the overlapping symbols.
- SP- semi-persistent
- P- periodic
- UE SP-SRS / P-SRS, HARQ-ACK, link recovery request and, if set to the same symbol as PUCCH carrying at least one of SR, UE does not transmit the SRS. If the UE is triggered that an aperiodic (AP-) SRS is transmitted in the same symbol as the PUCCH carrying HARQ-ACK, link recovery request and/or SR, the UE do not send In these cases, only SRS symbols that overlap with PUCCH symbols are dropped.
- AP- aperiodic
- AP-SRS For PUCCH and SRS on the same carrier, AP-SRS only carries SP-CSI/P-CSI reports, or SP-L1-RSRP/P-L1-RSRP reports only, or L1-SINR only PUCCH and If set to the same symbol, the UE does not transmit this PUCCH.
- the UE transmits the SP-SRS resource and over Drop P-SRS in overlapping symbols and transmit P-SRS in non-overlapping symbols.
- a multi-panel UL transmission scheme for a PUSCH schedule based on one DCI is under consideration. At least one of the following schemes 1 to 3 (multipanel UL transmission schemes 1 to 3) is under consideration as a multi-panel UL transmission scheme or multi-panel UL transmission scheme candidate. Only one of schemes 1-3 may be supported. Multiple schemes are supported, including at least one of schemes 1 to 3, and one of the multiple schemes may be configured in the UE.
- Method 1 Coherent multi-panel UL transmission
- Multiple panels may be synchronized with each other. All layers are mapped to all panels. Multiple analog beams are directed.
- An SRS resource indicator (SRI) field may be extended. This scheme may use up to 4 layers for the UL.
- the UE maps one codeword (CW) or one transport block (TB) to L layers (PUSCH(1,2,...,L)) and from each of the two panels Send L layers.
- Panel #1 and Panel #2 are coherent.
- Method 1 can obtain a gain due to diversity.
- the total number of layers in the two panels is 2L. If the maximum total number of layers is four, the maximum number of layers in one panel is two.
- Scheme 2 Non-coherent multi-panel UL transmission of one codeword (CW) or transport block (TB)] Multiple panels do not have to be synchronized. Different layers are mapped to one CW or TB for different panels and PUSCH from multiple panels. A layer corresponding to one CW or TB may be mapped to multiple panels. This scheme may use up to 4 layers or up to 8 layers for the UL. When supporting up to 8 layers, the scheme may support one CW or TB with up to 8 layers.
- the UE uses 1 CW or 1 TB as k layers (PUSCH (1, 2, ..., k)) and L ⁇ k layers (PUSCH (k + 1, k + 2, ..., L)). , sending k layers from panel #1 and Lk layers from panel #2.
- Scheme 2 can obtain gains due to multiplexing and diversity. The total number of layers in the two panels is L.
- Method 3 Two CW or TB non-coherent multi-panel UL transmission
- Multiple panels do not have to be synchronized.
- Different layers are mapped to different panels and two CWs or TBs for PUSCH from multiple panels.
- a layer corresponding to one CW or TB may be mapped to one panel.
- Layers corresponding to multiple CWs or TBs may be mapped to different panels.
- This scheme may use up to 4 layers or up to 8 layers for the UL. If supporting up to 8 layers, the scheme may support up to 4 layers per CW or TB.
- the UE maps CW#1 or TB#1 out of 2CWs or 2TB to k layers (PUSCH(1,2,...,k)) and CW#2 or TB#2. to L ⁇ k layers (PUSCH(k+1, k+2, . . . , L)) and transmit k layers from panel #1 and L ⁇ k layers from panel #2.
- Scheme 3 can obtain gains due to multiplexing and diversity. The total number of layers in the two panels is L.
- the inventors came up with a method for simultaneous UL transmission using multiple panels.
- A/B may mean “at least one of A and B”.
- A/B/C may mean “at least one of A, B and C.”
- At least one of UL channels and UL signals, UL channels/signals, transmission of UL channels/signals, and UL transmissions may be read interchangeably.
- higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- Broadcast information includes, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and other system information ( It may be Other System Information (OSI).
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- OSI System Information
- Physical layer signaling may be, for example, downlink control information (DCI).
- DCI downlink control information
- activate, deactivate, indicate (or indicate), select, configure, update, determine, etc. may be read interchangeably.
- Panel, Beam, Panel Group, Beam Group, Uplink (UL) transmitting entity TRP, Spatial Relationship Information (SRI), Spatial Relationship, Control Resource Set (COntrol Resource SET (CORESET)), Physical Downlink Shared Channel (PDSCH), codeword (CW), transport block (TB), base station, predetermined antenna port (e.g., demodulation reference signal (DeModulation Reference Signal (DMRS)) port), predetermined antenna port group (e.g., DMRS port group), predetermined group (e.g. Code Division Multiplexing (CDM) group, predetermined reference signal group, CORESET group), predetermined resource (e.g.
- SRI Spatial Relationship Information
- COntrol Resource SET CORESET
- PDSCH Physical Downlink Shared Channel
- CW codeword
- TB transport block
- predetermined antenna port e.g., demodulation Reference Signal (DeModulation Reference Signal (DMRS)
- predetermined antenna port group e.g., DMRS port group
- predetermined group
- predetermined reference signal resource predetermined resource set (for example, a predetermined reference signal resource set), CORESET pool, PUCCH group (PUCCH resource group), spatial relationship group, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink TCI state (UL TCI state), unified TCI state, QCL, etc. may be read interchangeably.
- the spatial relationship information Identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be read interchangeably.
- “Spatial relationship information” may be read interchangeably as “a set of spatial relationship information”, “one or more spatial relationship information”, and the like.
- the TCI state and TCI may be read interchangeably.
- indexes, IDs, indicators, and resource IDs may be read interchangeably.
- sequences, lists, sets, groups, groups, clusters, subsets, etc. may be read interchangeably.
- spatial relation information SRI
- spatial relation information for PUSCH SRI
- spatial relation information for PUSCH SRI
- spatial relation information for PUSCH SRI
- spatial relation information for PUSCH SRI
- spatial relation information for PUSCH SRI
- spatial relation information for PUSCH SRI
- spatial relation information for PUSCH spatial relation
- UL beam UL beam
- UE transmission beam UL TCI
- UL TCI state UL TCI state
- spatial relationship of UL TCI state SRS Resource Indicator
- SRI SRS Resource Indicator
- PUSCH, PUSCH of configuration grant, and repetition transmission (repetition) of PUSCH may be read interchangeably. That is, the PUSCH operation of each embodiment of the present disclosure can be appropriately applied to the PUSCH/PUSCH repetition transmission (repetition) of the configuration grant. Also, in the present disclosure, PUCCH and repeated transmission of PUCCH may be read interchangeably. Repeated transmission may be repeated transmission for a single TRP, or may be repeated transmission for multiple TRPs.
- drop, abort, cancel, puncture, rate match, postpone, etc. may be read interchangeably.
- overlapping channels/signals may mean that at least some of the resources of each channel/signal overlap in time, or all of the resources of each channel/signal overlap in time. It may be overlapping. Also, in this disclosure, overlapping channels/signals may mean that each channel is scheduled/configured/directed to overlap in time. That is, each temporally overlapping channel/signal may or may not actually be mapped/transmitted.
- a overlaps with B, A overlaps with B, and at least part of A overlaps with at least part of B may be read interchangeably.
- the UE may be configured for simultaneous UL transmission of multiple beams/panels.
- the configuration may be performed using higher layer signaling (eg, RRC signaling/MAC CE)/physical layer signaling.
- the setting may be a setting related to simultaneous UL transmission of multiple beams/panels, or a setting related to simultaneous UL transmission of multiple beams/panels across multiple (multiple types) of UL channels/signals.
- the UE may report capability information regarding simultaneous UL transmission of multiple beams/panels to the network (NW, eg, base station).
- NW eg, base station
- the UE capability information may be capability information for simultaneous UL transmission of multiple beams/panels, or capability information for simultaneous UL transmission of multiple beams/panels across multiple (multiple types) of UL channels/signals. good.
- the UE reports capability information regarding simultaneous UL transmission of multiple beams/panel to the NW and may be configured for simultaneous UL transmission of multiple beams/panel.
- the NW may transmit information regarding the UL channel/signal collision handling to the UE.
- the information may be sent using higher layer/physical layer signaling.
- the number of panels is two will be mainly explained, but the number of panels may be two or more.
- Each embodiment of the present disclosure can also be appropriately applied to transmission by three or more panels.
- the base station may receive at least one of multiple UL channels/signals that the UE simultaneously transmits.
- the first embodiment describes the case where the first UL channel (eg PUCCH) and the second UL channel (eg PUSCH) overlap in time.
- the first UL channel may be a UL signal/channel other than PUCCH
- the second UL channel may be a UL signal/channel other than PUSCH.
- the UE may perform multi-beam/panel simultaneous UL transmission on PUSCH and PUCCH.
- PUSCH in this embodiment may be read interchangeably with PUCCH as appropriate. That is, this embodiment may be applied to a case where PUCCHs temporally overlap.
- the UE may not perform simultaneous transmission of PUSCH and PUCCH when PUCCH and PUSCH overlap in time.
- the UE may transmit either PUCCH or PUSCH after dropping/multiplexing (mapping), as in existing specifications.
- Drop/multiplex (mapping) and/or determination/selection of one channel channel type (e.g., PUSCH or PUCCH), channel content/type (data/UCI/HARQ-ACK/CSI/SR) , the transmission timing/periodicity (P/AP/SP) of the content of the channel, and/or the priority of the channel.
- channel type e.g., PUSCH or PUCCH
- channel content/type data/UCI/HARQ-ACK/CSI/SR
- P/AP/SP transmission timing/periodicity
- a UE may perform simultaneous transmission of the PUSCH and PUCCH when the PUCCH and PUSCH overlap in time.
- an association between PUSCH/PUCCH (or beam/TCI state/spatial relationship of PUSCH/PUCCH) and the panel may be set.
- the UE may not transmit multiple channels simultaneously in each of multiple panels (one panel of multiple panels). That is, the UE may transmit one channel in each of multiple panels and transmit multiple channels using multiple panels.
- FIG. 6A is a diagram showing an example of multi-panel UL simultaneous transmission.
- the UE has multiple panels (Panel #1 and Panel #2).
- Panel #1 and Panel #2 For a UE, when beam #1 corresponding to the first UL channel/signal is associated with panel #1 and beam #2 corresponding to the second UL channel/signal is associated with panel #2, the UE: Simultaneous transmission of a first UL channel/signal and a second UL channel/signal may be possible.
- FIG. 6B is a diagram showing another example of multi-panel UL simultaneous transmission.
- the UE has multiple panels (Panel #1 and Panel #2).
- beam #1 corresponding to the first UL channel/signal and beam #2 corresponding to the second UL channel/signal are associated with the same panel (panel #2 in the example of FIG. 6B)
- the UE may not perform simultaneous transmission of the first UL channel/signal and the second UL channel/signal (or simultaneous transmission may not be supported).
- PUCCH and PUSCH are associated with the same panel, similar to existing specifications (similar to the above embodiment 1-1), after performing drop / multiplex (mapping), in each panel, PUCCH or PUSCH Any one channel may be transmitted.
- PUSCH and PUCCH are associated with different panels respectively, and when the PUSCH and PUCCH overlap in time, the UE transmits both PUSCH and PUCCH.
- the specific limitation may be at least one of the limitations described in Embodiments 1-3-1 to 1-3-4 below.
- a specific restriction may be a restriction related to the type of UCI (Embodiment 1-3-1).
- the UE may control simultaneous transmission of multi-panel PUSCH and PUCCH based on the type of UCI transmitted (carried) on PUCCH/PUSCH.
- the UE may control simultaneous transmission of PUCCH and PUSCH. Otherwise, the UE may not perform simultaneous transmission of PUCCH and PUSCH.
- the UE may drop PUCCH, or may multiplex (map) information carried by PUCCH onto PUSCH and transmit only PUSCH.
- the specific limit may be a limit related to the transmission power of UL transmission (embodiment 1-3-2).
- the UE may control the simultaneous transmission of multi-panel PUSCH and PUCCH based on whether or not the transmission power of simultaneous transmission is limited.
- the UE may control simultaneous transmission of PUCCH and PUSCH. Also, if the transmission power of UL transmission is limited, the UE may not perform simultaneous transmission of PUCCH and PUSCH. When simultaneous transmission of PUCCH and PUSCH is not performed, the UE may drop PUCCH, or may multiplex (map) information carried by PUCCH onto PUSCH and transmit only PUSCH. Alternatively, when the transmission power of UL transmission is limited, the transmission power of PUCCH/PUSCH may be reduced (power scaling).
- a specific restriction may be a restriction related to whether PUSCH carries a specific type of UCI from the same panel (Embodiment 1-3-3).
- the UE may control simultaneous transmission of multi-panel PUSCH and PUCCH based on whether PUSCH is used to transmit a particular type of UCI from the same panel.
- the UE may not transmit PUCCH and PUSCH simultaneously. Otherwise, the UE may control simultaneous transmission of PUCCH and PUSCH.
- the UE may drop PUCCH, or may multiplex (map) information carried by PUCCH onto PUSCH and transmit only PUSCH.
- a specific restriction may be a restriction related to PUSCH/PUCCH beams (TCI state/spatial relationship) (embodiment 1-3-4).
- the UE may control simultaneous transmission of multi-panel PUSCH and PUCCH based on PUSCH/PUCCH beams.
- the UE may control to perform simultaneous transmission of PUCCH and PUSCH. Otherwise, the UE may not perform simultaneous transmission of PUCCH and PUSCH.
- the UE may drop PUCCH, or may multiplex (map) information carried by PUCCH onto PUSCH and transmit only PUSCH.
- FIG. 7 is a diagram showing an example of simultaneous transmission of PUCCH and PUSCH according to the first embodiment.
- the UE determines the simultaneous transmissions based on certain restrictions on UL simultaneous transmissions.
- the UE drops/multiplexes PUCCH/PUSCH/SRS such as the above-described FIGS. to transmit PUSCH#1 on panel #2.
- the UE controls simultaneous transmission of PUCCH#1 and PUSCH#1 based on certain restrictions on UL simultaneous transmission.
- a second embodiment describes the case where a first UL channel/signal (eg SRS) and a second UL channel (eg PUSCH/PUCCH) overlap in time.
- the first UL channel/signal may be a UL signal/channel other than SRS
- the second UL channel may be a UL signal/channel other than PUSCH.
- the UE may perform multi-beam/panel simultaneous UL transmission for SRS and PUSCH/PUCCH.
- the UE When SRS and PUCCH/PUSCH overlap in time, the UE performs drop/multiplexing (mapping) as in existing specifications, and then either SRS or PUCCH/PUSCH channel/ You may send a signal.
- Drop/multiplex (mapping) and/or determination/selection of one channel channel type (e.g., PUSCH or PUCCH), channel content/type (data/UCI/HARQ-ACK/CSI/SR) , the transmission timing/type of content of the channel (P/AP/SP), and/or the priority of the channel.
- channel type e.g., PUSCH or PUCCH
- channel content/type data/UCI/HARQ-ACK/CSI/SR
- P/AP/SP the transmission timing/type of content of the channel
- the UE may perform simultaneous transmission of SRS and PUSCH/PUCCH when SRS and PUCCH/PUSCH overlap in time.
- an association between SRS/PUSCH/PUCCH (or beam/TCI state/spatial relationship of SRS/PUSCH/PUCCH) and the panel may be set.
- a UE may not simultaneously transmit multiple channels/signals in each of multiple panels (one panel of multiple panels) (see FIG. 6B). That is, the UE may transmit one channel/signal on each of multiple panels and transmit multiple channels using multiple panels.
- the UE performs drop / multiplexing (mapping) in the same manner as in existing specifications (similar to the above embodiment 1-1), then in each panel, Either one channel/signal of SRS or PUCCH/PUSCH may be transmitted (see FIG. 6A).
- SRS and PUSCH / PUCCH are associated with different panels, respectively, and when the SRS and PUSCH / PUCCH overlap in time, the UE uses the SRS and PUSCH/PUCCH may be transmitted.
- Either one channel/signal of SRS or PUCCH/PUSCH may be transmitted after dropping/multiplexing (mapping).
- the specific limitation may be at least one of the limitations described in Embodiments 2-3-1 to 2-3-6 below.
- a specific restriction may be a restriction related to the type of UCI (Embodiment 2-3-1).
- the UE may control simultaneous transmission of multi-panel SRS and PUSCH/PUCCH based on the type of UCI transmitted (carried) on PUCCH/PUSCH.
- the UE may control simultaneous transmission of SRS and PUCCH/PUSCH. Otherwise, the UE may not perform simultaneous transmission of SRS and PUCCH/PUSCH. When not performing simultaneous transmission of SRS and PUCCH/PUSCH, the UE may drop SRS/PUCCH/PUSCH.
- the specific limit may be a limit related to the transmission power of UL transmission (embodiment 2-3-2).
- the UE may control simultaneous transmission of multi-panel SRS and PUSCH/PUCCH based on whether there is a limit on transmission power for simultaneous transmission.
- the UE may control simultaneous transmission of SRS and PUCCH/PUSCH. Also, if the transmission power of UL transmission is not limited, the UE may not perform simultaneous transmission of SRS and PUCCH/PUSCH. When there is no simultaneous transmission of SRS and PUCCH/PUSCH, the UE may drop SRS/PUSCH/PUCCH or either SRS/PUSCH/PUCCH in overlapping time resources (eg, symbols). You don't have to send Alternatively, if the transmission power of UL transmission is limited, the transmission power of SRS/PUCCH/PUSCH may be reduced (power scaling).
- a specific restriction may be a restriction related to whether PUSCH/PUCCH carries a specific type of UCI from the same panel (embodiment 2-3-3).
- the UE may control simultaneous transmission of multi-panel SRS and PUCCH/PUSCH based on whether PUSCH/PUCCH is used to transmit a particular type of UCI from the same panel.
- the UE may not perform simultaneous transmission of SRS and PUCCH/PUSCH. Otherwise, the UE may control simultaneous transmission of SRS and PUCCH/PUSCH. The UE may drop SRS/PUSCH/PUCCH when not performing simultaneous transmission of PUCCH and PUSCH.
- a specific restriction may be a restriction related to PUSCH/PUCCH priority (priority index) (embodiment 2-3-4).
- the UE may control simultaneous transmission of multi-panel SRS and PUCCH/PUSCH based on the PUSCH/PUCC priority index.
- the UE does not need to transmit SRS and PUCCH/PUSCH simultaneously. In this case, the UE may transmit only PUCCH/PUSCH. Also, for example, when PUSCH/PUCCH has relatively high priority, the UE may control simultaneous transmission of SRS and PUCCH/PUSCH.
- the UE may not perform simultaneous transmission of SRS and PUCCH/PUSCH. In this case, the UE may transmit only SRS. Also, for example, if PUSCH/PUCCH has relatively low priority, the UE may control simultaneous transmission of SRS and PUCCH/PUSCH.
- a specific restriction may be a restriction related to the periodicity/type of SRS to be configured (whether the SRS to be configured is AP-SRS/P-SRS/SP-SRS) (Embodiment 2-3 -5).
- the UE may control simultaneous transmission of multi-panel SRS and PUCCH/PUSCH based on whether the configured SRS is AP-SRS/P-SRS/SP-SRS.
- the UE does not have to perform simultaneous transmission of the SRS and PUCCH/PUSCH. Otherwise, the UE may control simultaneous transmission of SRS and PUCCH/PUSCH. The UE may drop SRS/PUSCH/PUCCH when not performing simultaneous transmission of PUCCH and PUSCH.
- the UE does not have to perform simultaneous transmission of the SRS and PUCCH/PUSCH. Otherwise, the UE may control simultaneous transmission of SRS and PUCCH/PUSCH. The UE may drop SRS/PUSCH/PUCCH when not performing simultaneous transmission of PUCCH and PUSCH.
- the UE does not have to perform simultaneous transmission of SRS and PUCCH/PUSCH. Otherwise, the UE may control simultaneous transmission of SRS and PUCCH/PUSCH. The UE may drop SRS/PUSCH/PUCCH when not performing simultaneous transmission of PUCCH and PUSCH.
- a specific restriction may be a restriction related to SRS/PUSCH/PUCCH beams (TCI state/spatial relationship) (embodiment 2-3-6).
- the UE may control the simultaneous transmission of multi-panel SRS and PUSCH/PUCCH based on the SRS/PUSCH/PUCCH beams.
- the UE may control to perform simultaneous transmission of the SRS and PUSCH/PUCCH. . Otherwise, the UE may not perform simultaneous transmission of SRS and PUSCH/PUCCH. When not performing simultaneous transmission of SRS and PUSCH/PUCCH, the UE may drop SRS/PUSCH/PUCCH.
- FIG. 8 is a diagram showing an example of simultaneous transmission of SRS and PUCCH/PUSCH according to the second embodiment.
- the UE determines the simultaneous transmissions based on certain restrictions on UL simultaneous transmissions.
- the UE drops/multiplexes SRS/PUCCH/PUSCH as shown in FIGS. to transmit PUSCH#1 on panel #2.
- the UE controls simultaneous transmission of SRS#1 and PUSCH#1 based on certain restrictions on UL simultaneous transmission.
- a third embodiment describes the case where a first UL channel/signal (eg SRS) and a second UL channel/signal (eg SRS) overlap in time.
- the first UL channel/signal and the second UL channel/signal may be UL signals/channels other than SRS.
- the UE may perform simultaneous UL transmission of multiple (eg, two) SRSs.
- a UE may not perform simultaneous transmission of multiple SRSs when the multiple SRSs overlap in time.
- the UE may transmit any one of the multiple SRSs after performing drop/multiplexing (mapping), as in existing specifications.
- a UE may perform simultaneous transmission of multiple SRSs when the multiple SRSs overlap in time.
- an association between the SRS (or the beam/TCI state/spatial relationship of each SRS) and the panel may be set.
- the UE may not transmit multiple SRSs simultaneously in each of multiple panels (one panel of multiple panels) (see FIG. 6B). That is, the UE may transmit one SRS in each of multiple panels and transmit multiple SRSs using multiple panels.
- the UE When multiple SRSs are associated with the same panel, the UE performs drop/multiplexing (mapping) in the same manner as in existing specifications (similar to the above embodiment 1-1), and then assigns one SRS in each panel. may be transmitted (see FIG. 6A).
- the UE may transmit both overlapping SRSs.
- any one of a plurality of SRSs may be transmitted.
- the specific limitation may be at least one of the limitations described in Embodiments 3-3-1 to 3-3-5 below.
- a specific restriction may be a restriction related to the periodicity/type of SRS to be configured (whether the SRS to be configured is AP-SRS/P-SRS/SP-SRS) (Embodiment 3-3 -1).
- the UE may control the simultaneous transmission of multiple SRSs of the multi-panel based on the configured SRS periodicity/type.
- the UE may transmit multiple SRSs simultaneously. If different panels are associated with the same type of SRS, there may be no transmission of any one of the multiple SRSs in overlapping symbols.
- the UE may perform simultaneous No need to send. In this case, the UE may not transmit P-SRS/SP-SRS in overlapping symbols.
- the UE when P-SRS is associated with the first panel and SP-SRS is associated with the second panel, the UE does not need to transmit P-SRS and SP-SRS simultaneously. In this case, the UE may not transmit SP-SRS in overlapping symbols.
- the specific limit may be a limit related to the transmission power of UL transmission (embodiment 3-3-2).
- the UE may control the simultaneous transmission of multiple SRSs of the multi-panel based on whether or not the transmission power of the simultaneous transmission is limited.
- the UE may control simultaneous transmission of multiple SRSs. Also, if the transmission power of the UL transmission is not limited, the UE may not perform simultaneous transmission of multiple SRSs. When not performing simultaneous transmission of multiple SRSs, the UE may drop any one of the multiple SRSs or may not transmit any one of the multiple SRSs in overlapping symbols. . Alternatively, if the transmission power of UL transmission is limited, the transmission power of SRS may be reduced (power scaling).
- a specific limitation may be a limitation related to the usage of SRS (Embodiment 3-3-3).
- the UE may control the simultaneous transmission of multiple SRSs of multi-panel based on the SRS usage.
- the UE may transmit multiple SRSs simultaneously. If different panels are associated with SRSs of the same usage, there may be no transmission of any one of the multiple SRSs in overlapping symbols.
- the UE may You may control not to perform simultaneous transmission. In this case, the UE may drop the SRS with beam management application/SRS with codebook application or not transmit the SRS with beam management application/SRS with codebook application in overlapping symbols.
- the UE may have multiple SRSs may be controlled so as not to perform simultaneous transmission of In this case, the UE may drop the SRS with beam management application/non-codebook application or transmit the SRS with beam management application/non-codebook application in overlapping symbols. You don't have to.
- the UE may have multiple SRS You may control not to perform simultaneous transmission.
- the UE may drop the SRS with beam management application/SRS with antenna switching application or not transmit the SRS with beam management application/SRS with antenna switching application in overlapping symbols.
- the UE may have multiple SRSs may be controlled so as not to perform simultaneous transmission of In this case, the UE may drop codebook SRS/non-codebook SRS applications or transmit codebook SRS/non-codebook SRS applications in overlapping symbols. You don't have to.
- the UE may You may control not to perform simultaneous transmission. In this case, the UE may drop the SRS with codebook usage/SRS with antenna switching usage or not transmit the SRS with codebook usage/SRS with antenna switching usage in overlapping symbols.
- the UE may have multiple SRSs may be controlled so as not to perform simultaneous transmission of In this case, the UE may drop non-codebook SRS/antenna-switching SRS applications or transmit non-codebook SRS/antenna-switching SRS applications in overlapping symbols. You don't have to.
- a specific restriction may be a restriction related to SRS configuration (eg, RRC parameter "SRS-Config") (Embodiment 3-3-4).
- the UE may control the simultaneous transmission of multiple SRSs of the multi-panel based on the SRS settings.
- the UE may perform simultaneous transmission of multiple SRSs if each of the SRSs associated with different panels overlap in time but are not mapped to the same RE/Comb. Otherwise, the UE may not perform simultaneous transmission of multiple SRSs. Without simultaneous transmission, the UE may drop any of the SRSs or may not transmit any one of the SRSs in overlapping symbols.
- a specific limitation may be a limitation related to the SRS beam (TCI state/spatial relationship) (Embodiment 3-3-5).
- the UE may control simultaneous transmission of multiple SRSs based on the SRS beams.
- the UE performs simultaneous transmission of multiple SRS may be controlled to perform Otherwise, the UE may not perform simultaneous transmission of multiple SRSs.
- the UE may drop any of the SRSs or may not transmit any one of the SRSs in overlapping symbols.
- FIG. 9 is a diagram showing an example of simultaneous transmission of multiple SRSs according to the third embodiment.
- the UE determines the simultaneous transmissions based on certain restrictions on UL simultaneous transmissions.
- the UE performs drop/multiplexing of SRS/PUCCH/PUSCH as shown in FIGS. to transmit SRS#2 on panel #2.
- the UE controls simultaneous transmission of SRS#1 and SRS#2 based on certain restrictions on UL simultaneous transmission.
- the third embodiment it is possible to appropriately perform UL simultaneous transmission of multiple SRS multi-panels.
- RRC IEs Higher layer parameters/UE capabilities corresponding to features in at least one of the above embodiments may be defined.
- UE capabilities may indicate support for this feature.
- a UE for which a higher layer parameter corresponding to that function (enabling that function) is set may perform that function. It may be defined that "UEs for which upper layer parameters corresponding to the function are not set shall not perform the function (for example, according to Rel. 15/16)".
- a UE reporting UE capabilities indicating that it supports that function may perform that function. It may be specified that "a UE that does not report UE capabilities indicating that it supports the feature shall not perform that feature (eg according to Rel. 15/16)".
- a UE may perform a function if it reports a UE capability indicating that it supports the function, and the higher layer parameters corresponding to the function are configured. "If the UE does not report a UE capability indicating that it supports the function, or if the upper layer parameters corresponding to the function are not set, the UE does not perform the function (e.g., according to Rel. 15/16 ) may be defined.
- the UE capability may indicate whether the UE supports this function.
- the function may be UL simultaneous transmission with multi-panel/multi-beam.
- the function may be UL simultaneous transmission with multi-panel/multi-beam for PUSCH and non-PUSCH channels/signals.
- the function may be UL simultaneous transmission with multi-panel/multi-beam for different channels/signals.
- a UE capability may be defined in terms of whether it supports simultaneous transmission of multiple (eg, two) different UL channels/signals.
- UE capability may be defined by whether to support simultaneous transmission of PUCCH and PUSCH.
- a UE capability may be defined as whether to support simultaneous transmission of multiple PUCCHs (PUCCH and PUCCH).
- the UE capability may be defined by whether or not to support simultaneous transmission of SRS and PUSCH/PUCCH.
- UE capability may be defined as whether to support simultaneous transmission of multiple SRS (SRS (AP/P/SP-SRS) and SRS (AP/P/SP-SRS)).
- SRS SRS
- AP/P/SP-SRS SRS
- AP/P/SP-SRS SRS
- UE capabilities may be defined as to whether or not the association/configuration of PUCCH/PUSCH/SRS/beam/TCI state/spatial relationships and panels/RS groups is supported.
- the UE capability for multi-channel simultaneous transmission and the UE capability for UL simultaneous transmission using multi-panel may be defined as common capability information.
- the UE capability for multi-channel simultaneous transmission and the UE capability for UL simultaneous transmission using multi-panel may be defined independently.
- the UE can implement the above functions while maintaining compatibility with existing specifications.
- wireless communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
- communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.
- FIG. 10 is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.
- the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .
- LTE Long Term Evolution
- 5G NR 5th generation mobile communication system New Radio
- 3GPP Third Generation Partnership Project
- the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- RATs Radio Access Technologies
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
- RATs Radio Access Technologies
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
- LTE Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC NR-E -UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
- the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB) )) may be supported.
- dual connectivity NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB)
- gNB NR base stations
- a wireless communication system 1 includes a base station 11 forming a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. You may prepare.
- a user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminals 20 are not limited to the embodiment shown in the figure.
- the base stations 11 and 12 are collectively referred to as the base station 10 when not distinguished.
- the user terminal 20 may be connected to at least one of the multiple base stations 10 .
- the user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
- CA carrier aggregation
- CC component carriers
- DC dual connectivity
- Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
- Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2.
- FR1 may be a frequency band below 6 GHz (sub-6 GHz)
- FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
- the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- a plurality of base stations 10 may be connected by wire (for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is an IAB Also called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 directly or via another base station 10 .
- the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal compatible with at least one of communication schemes such as LTE, LTE-A, and 5G.
- a radio access scheme based on orthogonal frequency division multiplexing may be used.
- OFDM orthogonal frequency division multiplexing
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a radio access method may be called a waveform.
- other radio access schemes for example, other single-carrier transmission schemes and other multi-carrier transmission schemes
- the UL and DL radio access schemes may be used as the UL and DL radio access schemes.
- a downlink shared channel Physical Downlink Shared Channel (PDSCH)
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- an uplink shared channel (PUSCH) shared by each user terminal 20 an uplink control channel (PUCCH), a random access channel (Physical Random Access Channel (PRACH)) or the like may be used.
- PUSCH uplink shared channel
- PUCCH uplink control channel
- PRACH Physical Random Access Channel
- User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH.
- User data, higher layer control information, and the like may be transmitted by PUSCH.
- a Master Information Block (MIB) may be transmitted by the PBCH.
- Lower layer control information may be transmitted by the PDCCH.
- the lower layer control information may include, for example, downlink control information (DCI) including scheduling information for at least one of PDSCH and PUSCH.
- DCI downlink control information
- the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
- the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
- PDSCH may be replaced with DL data
- PUSCH may be replaced with UL data.
- a control resource set (CControl Resource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
- CORESET corresponds to a resource searching for DCI.
- the search space corresponds to the search area and search method of PDCCH candidates.
- a CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with certain search spaces based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set. Note that “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. in the present disclosure may be read interchangeably.
- PUCCH channel state information
- acknowledgment information for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
- SR scheduling request
- a random access preamble for connection establishment with a cell may be transmitted by the PRACH.
- downlink, uplink, etc. may be expressed without adding "link”.
- various channels may be expressed without adding "Physical" to the head.
- synchronization signals SS
- downlink reference signals DL-RS
- the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), Positioning Reference Signal (PRS)), Phase Tracking Reference Signal (PTRS)), etc.
- CRS cell-specific reference signal
- CSI-RS channel state information reference signal
- DMRS Demodulation reference signal
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS Block (SSB), and so on.
- SS, SSB, etc. may also be referred to as reference signals.
- DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal).
- FIG. 11 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- the base station 10 comprises a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 .
- One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140 may be provided.
- this example mainly shows the functional blocks that characterize the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 110 controls the base station 10 as a whole.
- the control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like.
- the control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission line interface 140 .
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 .
- the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
- the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
- the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
- the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.
- the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
- the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measurement section 123 .
- the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
- the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control for example, HARQ retransmission control
- the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.
- channel coding which may include error correction coding
- modulation modulation
- mapping mapping
- filtering filtering
- DFT discrete Fourier transform
- DFT discrete Fourier transform
- the transmitting/receiving unit 120 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .
- the transmitting/receiving unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
- the transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.
- FFT Fast Fourier transform
- IDFT Inverse Discrete Fourier transform
- the transmitting/receiving unit 120 may measure the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
- the measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured.
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- RSSI Received Signal Strength Indicator
- channel information for example, CSI
- the transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.
- the transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission path interface 140.
- the control unit 110 controls at least one of UL channels and UL signals that overlap in the time domain.
- the transmission of information for such dropping or mapping on a panel-by-panel basis may be controlled.
- the transmitting/receiving unit 120 transmits based on a specific condition when the first UL transmission corresponding to the first panel and the second UL transmission corresponding to the second panel overlap in the time domain. and at least one of the first UL transmission and the second UL transmission (first to third embodiments).
- FIG. 12 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
- the user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 .
- One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
- this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 210 controls the user terminal 20 as a whole.
- the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission/reception, measurement, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 .
- the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission/reception unit 220 .
- the transmitting/receiving section 220 may include a baseband section 221 , an RF section 222 and a measurement section 223 .
- the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212 .
- the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure.
- the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of a transmission processing section 2211 and an RF section 222 .
- the receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .
- the transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
- the transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- RLC layer processing for example, RLC retransmission control
- MAC layer processing for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control
- the transmitting/receiving unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
- Whether or not to apply DFT processing may be based on the settings of the transform precoder. Transmitting/receiving unit 220 (transmission processing unit 2211), for a certain channel (for example, PUSCH), if the transform precoder is enabled, the above to transmit the channel using the DFT-s-OFDM waveform
- the DFT process may be performed as the transmission process, or otherwise the DFT process may not be performed as the transmission process.
- the transmitting/receiving unit 220 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 230. .
- the transmitting/receiving section 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.
- the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmitting/receiving section 220 may measure the received signal.
- the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
- the measuring unit 223 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, SNR), signal strength (eg, RSSI), channel information (eg, CSI), and the like.
- the measurement result may be output to control section 210 .
- the transmitter and receiver of the user terminal 20 in the present disclosure may be configured by at least one of the transmitter/receiver 220 and the transmitter/receiver antenna 230 .
- the control unit 210 may drop or map at least one of UL channels and UL signals that overlap in the time domain when UL transmission using multiple panels including at least a first panel and a second panel is supported. may be performed on a panel-by-panel basis to determine a first UL transmission corresponding to the first panel and a second UL transmission corresponding to the second panel.
- Transceiver 220 when the first UL transmission and the second UL transmission overlap in the time domain, based on a specific condition, at least the first UL transmission and the second UL transmission One transmission may be performed (first to third embodiments).
- the specific condition is transmitted using PUCCH.
- the specific Conditions are conditions based on the type of uplink control information transmitted using PUCCH, conditions related to the transmission power of the first UL transmission and the second UL transmission, uplink control information transmitted using PUSCH at least one of a condition based on the type of, a condition on the priority of the first UL transmission, a condition on the periodicity of the SRS, a condition on the beam of at least one of the first UL transmission and the second UL transmission
- PUSCH physical uplink shared channel
- PUCCH physical uplink control channel
- SRS sounding reference signal
- the specific condition is the first UL transmission and the second UL transmission periodicity condition, the first UL transmission and the second UL transmission transmission power conditions, the first UL transmission and the second UL transmission usage conditions, SRS configuration conditions , a condition regarding at least one beam of the first UL transmission and the second UL transmission (third embodiment).
- SRS Sounding Reference Signal
- each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
- a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 13 is a diagram illustrating an example of hardware configurations of a base station and user terminals according to an embodiment.
- the base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
- processor 1001 may be implemented by one or more chips.
- predetermined software program
- the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .
- the processor 1001 operates an operating system and controls the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
- CPU central processing unit
- control unit 110 210
- transmission/reception unit 120 220
- FIG. 10 FIG. 10
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
- the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
- the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.
- a computer-readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include
- the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- a signal may also be a message.
- a reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc., depending on the applicable standard.
- a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may consist of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) that make up a radio frame may be called a subframe.
- a subframe may consist of one or more slots in the time domain.
- a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
- a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
- Numerology for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may also be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
- one subframe may be called a TTI
- a plurality of consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
- a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
- the short TTI e.g., shortened TTI, etc.
- a TTI having the above TTI length may be read instead.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
- the number of subcarriers included in an RB may be determined based on neumerology.
- an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long.
- One TTI, one subframe, etc. may each be configured with one or more resource blocks.
- One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.
- PRB Physical Resource Block
- SCG Sub-Carrier Group
- REG Resource Element Group
- PRB pair RB Also called a pair.
- a resource block may be composed of one or more resource elements (Resource Element (RE)).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP for UL
- BWP for DL DL BWP
- One or multiple BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given channel/signal outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
- the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
- information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
- Information, signals, etc. may be input and output through multiple network nodes.
- Input/output information, signals, etc. may be stored in a specific location (for example, memory), or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.
- Uplink Control Information (UCI) Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
- RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
- MAC signaling may be notified using, for example, a MAC Control Element (CE).
- CE MAC Control Element
- notification of predetermined information is not limited to explicit notification, but implicit notification (for example, by not notifying the predetermined information or by providing another information by notice of
- the determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) , a server, or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.
- a “network” may refer to devices (eg, base stations) included in a network.
- precoding "precoding weight”
- QCL Quality of Co-Location
- TCI state Transmission Configuration Indication state
- spatialal patial relation
- spatialal domain filter "transmission power”
- phase rotation "antenna port
- antenna port group "layer”
- number of layers Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable. can be used as intended.
- base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
- a base station can accommodate one or more (eg, three) cells.
- the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is assigned to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head (RRH))) may also provide communication services.
- a base station subsystem e.g., a small indoor base station (Remote Radio)). Head (RRH)
- RRH Head
- the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.
- MS Mobile Station
- UE User Equipment
- Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , a handset, a user agent, a mobile client, a client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
- the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a user terminal.
- communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- the user terminal 20 may have the functions of the base station 10 described above.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- user terminals in the present disclosure may be read as base stations.
- the base station 10 may have the functions of the user terminal 20 described above.
- operations that are assumed to be performed by the base station may be performed by its upper node in some cases.
- various operations performed for communication with a terminal may involve the base station, one or more network nodes other than the base station (e.g., Clearly, this can be done by a Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG xG (xG (x is, for example, an integer or a decimal number)
- Future Radio Access FAA
- RAT New - Radio Access Technology
- NR New Radio
- NX New radio access
- FX Future generation radio access
- GSM registered trademark
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi®
- IEEE 802.16 WiMAX®
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, or other suitable wireless It may be applied to systems using communication methods, next-generation systems extended based on these, and the like. Also, multiple systems may be applied to systems using communication methods, next-generation systems extended based on these, and the like
- any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.
- determining includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be “determining.”
- determining (deciding) includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.
- determining is considered to be “determining” resolving, selecting, choosing, establishing, comparing, etc. good too. That is, “determining (determining)” may be regarded as “determining (determining)” some action.
- connection refers to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- radio frequency domain when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
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Abstract
Description
NRでは、UEがコードブック(Codebook(CB))ベース送信及びノンコードブック(Non-Codebook(NCB))ベース送信の少なくとも一方をサポートすることが検討されている。
UEは、測定用参照信号(例えば、サウンディング参照信号(Sounding Reference Signal(SRS)))の送信に用いられる情報(SRS設定情報、例えば、RRC制御要素の「SRS-Config」内のパラメータ)を受信してもよい。
Rel.15及びRel.16のUEにおいては、1つのみのビーム及びパネルが、1つの時点においてUL送信に用いられる(図2A)。Rel.17においては、ULのスループット及び信頼性(reliability)の改善のために、1以上のTRPに対して、複数ビーム及び複数パネルの同時UL送信が検討されている。
Rel.16 NRでは、ULのビーム指示方法として、UL TCI状態を用いることが検討されている。UL TCI状態の通知は、UEのDLビーム(DL TCI状態)の通知に類似する。なお、DL TCI状態は、PDCCH/PDSCHのためのTCI状態と互いに読み換えられてもよい。
将来の無線通信システム(例えば、NR)では、モバイルブロードバンドのさらなる高度化(例えば、enhanced Mobile Broadband(eMBB))、多数同時接続を実現するマシンタイプ通信(例えば、massive Machine Type Communications(mMTC)、Internet of Things(IoT))、高信頼かつ低遅延通信(例えば、Ultra-Reliable and Low-Latency Communications(URLLC))などのトラフィックタイプ(サービス、サービスタイプ、通信タイプ、ユースケース、等ともいう)が想定される。例えば、URLLCでは、eMBBより小さい遅延及びより高い信頼性が要求される。
・異なる優先度(priority)を有する論理チャネル
・変調及び符号化方式(Modulation and Coding Scheme(MCS))テーブル(MCSインデックステーブル)
・チャネル品質指示(Channel Quality Indication(CQI))テーブル
・DCIフォーマット
・当該DCI(DCIフォーマット)に含まれる(付加される)巡回冗長検査(CRC:Cyclic Redundancy Check)ビットのスクランブル(マスク)に用いられる(無線ネットワーク一時識別子(RNTI:System Information-Radio Network Temporary Identifier))
・RRC(Radio Resource Control)パラメータ
・特定のRNTI(例えば、URLLC用のRNTI、MCS-C-RNTI等)
・サーチスペース
・DCI内の所定フィールド(例えば、新たに追加されるフィールド又は既存のフィールドの再利用)
・当該PDSCHの変調次数(modulation order)、ターゲット符号化率(target code rate)、トランスポートブロックサイズ(TBS:Transport Block size)の少なくとも一つの決定に用いられるMCSインデックステーブル(例えば、MCSインデックステーブル3を利用するか否か)
・当該PDSCHのスケジューリングに用いられるDCIのCRCスクランブルに用いられるRNTI(例えば、C-RNTI又はMCS-C-RNTIのどちらでCRCスクランブルされるか)
・当該PUSCHの変調次数、ターゲット符号化率、TBSの少なくとも一つの決定に用いられるMCSインデックステーブル(例えば、MCSインデックステーブル3を利用するか否か)
・当該PUSCHのスケジューリングに用いられるDCIのCRCスクランブルに用いられるRNTI(例えば、C-RNTI又はMCS-C-RNTIのどちらでCRCスクランブルされるか)
Rel.16以降のNRでは、所定の信号又はチャネルに対して複数レベル(例えば、2レベル)の優先度を設定することが検討されている。例えば、異なるトラフィックタイプ(サービス、サービスタイプ、通信タイプ、ユースケース等ともいう)にそれぞれ対応する信号又はチャネル毎に別々の優先度を設定して通信を制御(例えば、衝突時の送信制御等)することが想定される。これにより、同じ信号又はチャネルに対して、サービスタイプ等に応じて異なる優先度を設定して通信を制御することが可能となる。
UEは、複数のUL信号/ULチャネルがオーバーラップ(又は、衝突(collision))する場合、優先度に基づいてUL送信を制御してもよい。
以下では、Rel.16までに規定される、具体的な各種のULチャネル/信号のオーバーラップ時の処理(衝突(collision)ハンドリング)について説明する。
あるサービングセルにおける、優先度インデックス「1」のPUSCH送信(PUSCH transmission with a priority index 1)又は優先度インデックス「1」のPUCCH送信(PUCCH transmission with a priority index 1)と、SRS送信とが時間的に重複する場合、UEは、当該重複するシンボルにおいてSRSを送信しない。
リソースタイプ(RRCパラメータ「resourceType」)が「非周期的」にセットされたSRSリソースがトリガされるシンボルに、P-SRS/SP-SRSが設定されるケースでは、UEは、AP-SRSリソースを送信し、オーバーラップするシンボルにおけるP-SRS/SP-SRSをドロップし、オーバーラップしないシンボルにおけるP-SRS/SP-SRSを送信する。
Rel.18以降において、ULのスループット/信頼性の改善のために、1以上のTRPに向けて、複数パネルを用いる同時UL送信がサポートされることが検討されている。
複数パネルが互いに同期していてもよい。全てのレイヤは、全てのパネルにマップされる。複数アナログビームが指示される。SRSリソースインジケータ(SRI)フィールドが拡張されてもよい。この方式は、ULに対して最大4レイヤを用いてもよい。
複数パネルが同期していなくてもよい。異なるレイヤは、異なるパネルと、複数パネルからのPUSCHに対する1つのCW又はTBにマップされる。1つのCW又はTBに対応するレイヤが、複数パネルにマップされてもよい。この方式は、ULに対して最大4レイヤ又は最大8レイヤを用いてもよい。最大8レイヤをサポートする場合、この方式は、最大8レイヤを用いる1つのCW又はTBをサポートしてもよい。
複数パネルが同期していなくてもよい。異なるレイヤは、異なるパネルと、複数パネルからのPUSCHに対する2つのCW又はTBにマップされる。1つのCW又はTBに対応するレイヤが、1つのパネルにマップされてもよい。複数のCW又はTBに対応するレイヤが、異なるパネルにマップされてもよい。この方式は、ULに対して最大4レイヤ又は最大8レイヤを用いてもよい。最大8レイヤをサポートする場合、この方式は、CW又はTB当たり最大4レイヤをサポートしてもよい。
UEは、マルチビーム/パネルの同時UL送信を設定されてもよい。当該設定は、上位レイヤシグナリング(例えば、RRCシグナリング/MAC CE)/物理レイヤシグナリングを用いて行われてもよい。
第1の実施形態は、第1のULチャネル(例えば、PUCCH)及び第2のULチャネル(例えば、PUSCH)が時間的にオーバーラップするケースを説明する。なお、第1のULチャネルはPUCCH以外のUL信号/チャネルであってもよく、第2のULチャネルはPUSCH以外のUL信号/チャネルであってもよい。
UEは、PUCCH及びPUSCHが時間的にオーバーラップするとき、当該PUSCH及びPUCCHの同時送信を行わなくてもよい。
UEは、PUCCH及びPUSCHが時間的にオーバーラップするとき、当該PUSCH及びPUCCHの同時送信を行ってもよい。
PUSCHとPUCCHとがそれぞれ異なるパネルに関連付けられている場合、PUSCHとPUCCHとの同時送信に対する特定の制限(条件)が規定されてもよい。
第2の実施形態は、第1のULチャネル/信号(例えば、SRS)及び第2のULチャネル(例えば、PUSCH/PUCCH)が時間的にオーバーラップするケースを説明する。なお、第1のULチャネル/信号はSRS以外のUL信号/チャネルであってもよく、第2のULチャネルはPUSCH以外のUL信号/チャネルであってもよい。
UEは、SRSと、PUCCH/PUSCHとが時間的にオーバーラップするとき、当該SRS及びPUSCH/PUCCHの同時送信を行わなくてもよい。
UEは、SRSと、PUCCH/PUSCHとが時間的にオーバーラップするとき、当該SRS及びPUSCH/PUCCHの同時送信を行ってもよい。
SRSと、PUSCH/PUCCHとがそれぞれ異なるパネルに関連付けられている場合、SRSと、PUSCH/PUCCHとの同時送信に対する特定の制限(条件)が規定されてもよい。
第3の実施形態は、第1のULチャネル/信号(例えば、SRS)及び第2のULチャネル/信号(例えば、SRS)が時間的にオーバーラップするケースを説明する。なお、第1のULチャネル/信号及び第2のULチャネル/信号はSRS以外のUL信号/チャネルであってもよい。
UEは、複数のSRSが時間的にオーバーラップするとき、当該複数のSRSの同時送信を行わなくてもよい。
UEは、複数のSRSが時間的にオーバーラップするとき、当該複数のSRSの同時送信を行ってもよい。
複数のSRSのそれぞれが異なるパネルに関連付けられている場合、複数のSRSの同時送信に対する特定の制限(条件)が規定されてもよい。
以上の複数の実施形態の少なくとも1つにおける機能(特徴、feature)に対応する上位レイヤパラメータ(RRC IE)/UE能力(capability)が規定されてもよい。UE能力は、この機能をサポートすることを示してもよい。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図11は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図12は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- 第1のパネルと第2のパネルを少なくとも含む複数のパネルを利用したUL送信がサポートされる場合、時間領域でオーバーラップするULチャネル及びUL信号の少なくともいずれかのドロップ又はマッピングをパネル単位で行い、前記第1のパネルに対応する第1のUL送信と、前記第2のパネルに対応する第2のUL送信とを決定する制御部と、
前記第1のUL送信と前記第2のUL送信とが時間領域でオーバーラップする場合、特定の条件に基づいて、前記第1のUL送信及び前記第2のUL送信の少なくとも一つの送信を行う送信部と、を有する端末。 - 前記第1のUL送信が物理上りリンク共有チャネル(PUSCH)であり、前記第2のUL送信が物理上りリンク制御チャネル(PUCCH)である場合、前記特定の条件は、PUCCHを用いて送信される上りリンク制御情報のタイプに基づく条件、前記第1のUL送信及び前記第2のUL送信の送信電力に関する条件、PUSCHを用いて送信される上りリンク制御情報のタイプに基づく条件、前記第1のUL送信及び前記第2のUL送信の少なくとも一方のビームに関する条件、の少なくとも1つである、請求項1に記載の端末。
- 前記第1のUL送信が物理上りリンク共有チャネル(PUSCH)及び物理上りリンク制御チャネル(PUCCH)の少なくとも一方であり、前記第2のUL送信がサウンディング参照信号(SRS)である場合、前記特定の条件は、PUCCHを用いて送信される上りリンク制御情報のタイプに基づく条件、前記第1のUL送信及び前記第2のUL送信の送信電力に関する条件、PUSCHを用いて送信される上りリンク制御情報のタイプに基づく条件、前記第1のUL送信の優先度に関する条件、前記SRSの周期性に関する条件、前記第1のUL送信及び前記第2のUL送信の少なくとも一方のビームに関する条件、の少なくとも1つである、請求項1に記載の端末。
- 前記第1のUL送信が第1のサウンディング参照信号(SRS)であり、前記第2のUL送信が第2のSRSである場合、前記特定の条件は、前記第1のUL送信及び前記第2のUL送信の周期性に関する条件、前記第1のUL送信及び前記第2のUL送信の送信電力に関する条件、前記第1のUL送信及び前記第2のUL送信の用途に関する条件、SRS設定に関する条件、前記第1のUL送信及び前記第2のUL送信の少なくとも一方のビームに関する条件、の少なくとも1つである、請求項1に記載の端末。
- 第1のパネルと第2のパネルを少なくとも含む複数のパネルを利用したUL送信がサポートされる場合、時間領域でオーバーラップするULチャネル及びUL信号の少なくともいずれかのドロップ又はマッピングをパネル単位で行い、前記第1のパネルに対応する第1のUL送信と、前記第2のパネルに対応する第2のUL送信とを決定するステップと、
前記第1のUL送信と前記第2のUL送信とが時間領域でオーバーラップする場合、特定の条件に基づいて、前記第1のUL送信及び前記第2のUL送信の少なくとも一つの送信を行うステップと、を有する端末の無線通信方法。 - 端末の第1のパネルと第2のパネルを少なくとも含む複数のパネルを利用したUL送信がサポートされる場合、時間領域でオーバーラップするULチャネル及びUL信号の少なくともいずれかのドロップ又はマッピングをパネル単位で行うための情報の送信を制御する制御部と、
前記第1のパネルに対応する第1のUL送信と前記第2のパネルに対応する第2のUL送信とが時間領域でオーバーラップする場合、特定の条件に基づいて送信される、前記第1のUL送信及び前記第2のUL送信の少なくとも一つを受信する受信部と、を有する基地局。
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