WO2023136055A1 - 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
- one or more transmission/reception points (TRP) (multi-TRP) will use one or more panels (multi-panel) to communicate with terminals ( DL transmission (e.g., downlink shared channel (e.g., PDSCH) transmission) / UL transmission (e.g., uplink shared channel (e.g., PUSCH) transmission) can be scheduled for user terminal, User Equipment (UE)) being considered.
- TRP transmission/reception points
- UE User Equipment
- transmission/reception of multiple signals/channels from one or multiple transmission/reception points is also assumed.
- one or more downlink control information e.g., DCI
- downlink control channel e.g., PDCCH
- DCI downlink control information
- PDCCH downlink control channel
- transmission control e.g., TCI state/QCL assumptions, etc.
- the present disclosure aims to provide a terminal, a wireless communication method, and a base station that can appropriately perform communication even when multiple DL transmissions / UL transmissions are scheduled by one or more TRPs. Let it be one.
- a terminal includes a receiving unit that receives downlink first information that indicates a schedule of multiple physical shared channel transmissions and second information that indicates a unified transmission configuration indicator (TCI). and when the update timing of the unified TCI state indicated by the second information is set in the middle of the period during which the plurality of physical shared channel transmissions are performed, a predetermined TCI state is set for the plurality of physical shared channel transmissions. and a control unit for controlling to be commonly applied.
- TCI transmission configuration indicator
- communication can be properly performed even when multiple DL transmissions/UL transmissions are scheduled by one or more TRPs.
- FIG. 1A and 1B are diagrams illustrating an example of a unified/common TCI framework.
- 2A and 2B are diagrams illustrating an example of joint/separate TCI state indications.
- FIG. 3 is a diagram illustrating an example of timing to application of indicated TCI conditions.
- FIG. 4 is a diagram showing an example of a case where the update timing of the TCI state indicated by DCI is set in the middle of the transmission period of multi-PDSCH.
- FIG. 5 is a diagram showing an example of a case where the update timing of the TCI state activated by MAC CE is set in the middle of the transmission period of multi-PDSCH.
- FIG. 6 is a diagram showing an example of a TCI state applied/set to a multi-shared channel in the first embodiment.
- FIG. 7 is a diagram showing an example of the TCI state applied/set to the multi-shared channel in the second embodiment.
- FIG. 8 is a diagram showing another example of TCI states applied/set to multi-shared channels in the second embodiment.
- FIG. 9 is a diagram showing another example of TCI states applied/set to multi-shared channels in the second 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.
- FIG. 14 is a diagram illustrating an example of a vehicle according to one embodiment;
- the reception processing e.g., reception, demapping, demodulation, decoding
- transmission processing e.g, at least one of transmission, mapping, precoding, modulation, encoding
- the TCI state may represent those that apply to downlink signals/channels.
- the equivalent of TCI conditions applied to uplink signals/channels may be expressed as spatial relations.
- the TCI state is information about the pseudo-co-location (QCL) of signals/channels, and may be called spatial reception parameters, spatial relation information, or the like.
- the TCI state may be set in the UE on a channel-by-channel or signal-by-signal basis.
- QCL is an index that indicates the statistical properties of a signal/channel. For example, when one signal/channel and another signal/channel have a QCL relationship, Doppler shift, Doppler spread, average delay ), delay spread, spatial parameters (e.g., spatial Rx parameter) are identical (QCL with respect to at least one of these). You may
- the spatial reception parameters may correspond to the reception beams of the UE (eg, reception analog beams), and the beams may be specified based on the spatial QCL.
- QCL or at least one element of QCL in the present disclosure may be read as sQCL (spatial QCL).
- QCL types A plurality of types (QCL types) may be defined for the QCL.
- QCL types AD may be provided with different parameters (or parameter sets) that can be assumed to be the same, and the parameters (which may be referred to as QCL parameters) are shown below:
- QCL type A QCL-A
- QCL type B QCL-B
- QCL type C QCL-C
- QCL-D Spatial reception parameters.
- CORESET Control Resource Set
- QCL QCL type D
- a UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal/channel based on the TCI conditions or QCL assumptions of that signal/channel.
- Tx beam transmit beam
- Rx beam receive beam
- the TCI state may be, for example, information about the QCL between the channel of interest (in other words, the reference signal (RS) for the channel) and another signal (for example, another RS). .
- the TCI state may be set (indicated) by higher layer signaling, physical layer signaling or a combination thereof.
- Physical layer signaling may be, for example, downlink control information (DCI).
- DCI downlink control information
- Channels for which TCI states or spatial relationships are set are, for example, Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel It may be at least one of a channel (PUSCH)) and an uplink control channel (Physical Uplink Control Channel (PUCCH)).
- PDSCH Physical Downlink Shared Channel
- PDCCH Physical Uplink Control Channel
- RSs that have a QCL relationship with the channel are, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a measurement reference signal (Sounding It may be at least one of a reference signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).
- SSB synchronization signal block
- CSI-RS channel state information reference signal
- Sounding It may be at least one of a reference signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called a QRS).
- SRS reference signal
- TRS tracking reference signal
- QRS QCL detection reference signal
- An SSB is a signal block that includes at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- PBCH Physical Broadcast Channel
- An SSB may also be called an SS/PBCH block.
- a QCL type X RS in a TCI state may mean an RS that has a QCL type X relationship with (the DMRS of) a certain channel/signal, and this RS is called a QCL type X QCL source in that TCI state.
- QCL type A RS is always set for PDCCH and PDSCH, and QCL type D RS may be additionally set. Since it is difficult to estimate Doppler shift, delay, etc. by receiving DMRS one-shot, QCL type A RS is used to improve channel estimation accuracy. QCL type D RS is used for receive beam determination during DMRS reception.
- TRS 1-1, 1-2, 1-3, 1-4 are transmitted, and TRS 1-1 is notified as QCL type C/D RS depending on the TCI status of PDSCH.
- the UE can use the information obtained from the past periodic TRS1-1 reception/measurement results for PDSCH DMRS reception/channel estimation.
- the PDSCH QCL source is TRS1-1 and the QCL target is the PDSCH DMRS.
- the PDSCH may be scheduled on DCI with the TCI field.
- the TCI state for PDSCH is indicated by the TCI field.
- the TCI field of DCI format 1-1 is 3 bits
- the TCI field of DCI format 1-2 is 3 bits maximum.
- the UE In RRC connected mode, if for a CORESET that schedules the PDSCH, if the first TCI in DCI information element (higher layer parameter tci-PresentInDCI) is set to 'enabled', the UE shall Assume that the TCI field is present in DCI format 1_1 of the transmitted PDCCH.
- DCI information element higher layer parameter tci-PresentInDCI
- the UE will set the DCI format of the PDSCH transmitted in that CORESET 1_2, there is a TCI field with the DCI field size indicated in the second DCI-in-TCI information element.
- the PDSCH may be scheduled on DCI with no TCI field.
- the DCI format of the DCI is DCI format 1_0 or DCI format 1_1/1_2 in the case where the TCI information element in DCI (higher layer parameter tci-PresentInDCI or tci-PresentInDCI-1-2) is not set (enabled).
- the UE assumes that the TCI state or QCL assumption for the PDSCH is the same as the TCI state or QCL assumption for the CORESET (e.g. scheduling DCI) (default TCI state) .
- the TCI information element in DCI (higher layer parameters tci-PresentInDCI and tci-PresentInDCI-1-2) is set to "enabled", and when the TCI information element in DCI is not set .
- the threshold timeDurationForQCL
- the PDSCH TCI state (default TCI state) is the TCI state of the lowest CORESET ID in the most recent slot in the active DL BWP of that CC (for a particular UL signal) may be Otherwise, the TCI state of the PDSCH (default TCI state) may be the TCI state of the lowest TCI state ID of the PDSCH in the active DL BWP of the scheduled CC.
- Rel. 15 requires separate MAC CEs for activation/deactivation of PUCCH spatial relations and MAC CEs for activation/deactivation of SRS spatial relations.
- the PUSCH spatial relationship follows the SRS spatial relationship.
- At least one of MAC CE for activation/deactivation of PUCCH spatial relationship and MAC CE for activation/deactivation of SRS spatial relationship may not be used.
- both the spatial relationship and PL-RS for PUCCH are not configured (applicable condition, second condition)
- default assumption of spatial relationship and PL-RS for PUCCH (default spatial relationship and default PL-RS) applies.
- both the spatial relationship and PL-RS for SRS (SRS resource for SRS or SRS resource corresponding to SRI in DCI format 0_1 that schedules PUSCH) are not configured (applicable condition, second condition)
- the default assumption of spatial relationship and PL-RS (default spatial relationship and default PL-RS) is applied for PUSCH and SRS scheduled by DCI format 0_1.
- the default spatial relationship and default PL-RS are assumed to be the TCI state or QCL of the CORESET with the lowest CORESET ID in that active DL BWP. There may be. If no CORESET is set in the active DL BWP on that CC, the default spatial relationship and default PL-RS may be the active TCI state with the lowest ID of the PDSCH in that active DL BWP.
- the spatial relationship of PUSCHs scheduled by DCI format 0_0 follows the spatial relationship of the PUCCH resource with the lowest PUCCH resource ID among the active spatial relationships of PUCCHs on the same CC.
- the network needs to update the PUCCH spatial relationship on all SCells even if no PUCCH is transmitted on the SCell.
- the conditions for applying the default spatial relationship/default PL-RS for SRS may include that the default beam path loss enablement information element for SRS (higher layer parameter enableDefaultBeamPlForSRS) is set to valid.
- the conditions for applying the default spatial relationship/default PL-RS for PUCCH may include that the enable default beam path loss information element for PUCCH (higher layer parameter enableDefaultBeamPlForPUCCH) is set to Enabled.
- the application condition of the default spatial relationship/default PL-RS for PUSCH scheduled by DCI format 0_0 is that the default beam path loss enable information element for PUSCH scheduled by DCI format 0_0 (higher layer parameter enableDefaultBeamPlForPUSCH0_0) is set to valid.
- RRC parameters (enable default beam PL for PUCCH (enableDefaultBeamPL-ForPUCCH), enable default beam PL for PUSCH (enableDefaultBeamPL-ForPUSCH0_0), or SRS If the parameter to enable default beam PL for (enableDefaultBeamPL-ForSRS) is set and no spatial relationship or PL-RS is configured, the UE applies the default spatial relationship/PL-RS.
- the above thresholds are time duration for QCL, "timeDurationForQCL”, “Threshold”, “Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI”, “Threshold-Sched-Offset”, “ beamSwitchTiming”, schedule offset threshold, scheduling offset threshold, etc.
- the threshold may be reported by the UE as a UE capability (per subcarrier spacing).
- the offset (scheduling offset) between the reception of the DL DCI and the corresponding PDSCH is smaller than the threshold timeDurationForQCL, and at least one TCI state set for the serving cell of the scheduled PDSCH is "QCL type D" and if the UE is configured with two default TCI enable information elements (enableTwoDefaultTCIStates-r16) and at least one TCI codepoint (the codepoint of the TCI field in the DL DCI) indicates two TCI states, the UE is the PDSCH of the serving cell or the DMRS port of the PDSCH transmission occasion is RS and QCL with respect to the QCL parameters associated with the two TCI states corresponding to the lowest of the TCI codepoints containing the two different TCI states ( quasi co-located) (2 default QCL assumption decision rule). 2 default TCI enablement information element specifies the Rel. 16 operation is enabled.
- PDSCH default TCI states in 2015/16 a default TCI state for single TRP, a default TCI state for multi-TRP based on multi-DCI, and a default TCI state for multi-TRP based on single DCI are specified.
- Default TCI state for aperiodic CSI-RS (A(aperiodic)-CSI-RS) on 2015/16: default TCI state for single TRP, default TCI state for multi-TRP based on multi-DCI, based on single DCI A default TCI state for multi-TRP is specified.
- the default spatial relationship and default PL-RS are specified for PUSCH/PUCCH/SRS respectively.
- Multi-TRP In NR, one or more transmission/reception points (Transmission/Reception Points (TRP)) (multi TRP (multi TRP (MTRP))) uses one or more panels (multi-panel) to the UE DL transmission is under consideration. It is also being considered that the UE uses one or more panels to perform UL transmissions for one or more TRPs.
- TRP Transmission/Reception Points
- MTRP multi TRP
- a plurality of TRPs may correspond to the same cell identifier (cell identifier (ID)) or may correspond to different cell IDs.
- the cell ID may be a physical cell ID or a virtual cell ID.
- Multi-TRPs may be connected by ideal/non-ideal backhauls to exchange information, data, and the like.
- Different codewords (CW) and different layers may be transmitted from each TRP of the multi-TRP.
- Non-Coherent Joint Transmission NCJT may be used as one form of multi-TRP transmission.
- TRP#1 modulate-maps a first codeword and layer-maps a first number of layers (e.g., two layers) with a first precoding to transmit a first PDSCH.
- TRP#2 also modulates and layer-maps a second codeword to transmit a second PDSCH with a second number of layers (eg, 2 layers) with a second precoding.
- multiple PDSCHs to be NCJTed may be defined as partially or completely overlapping in at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap at least one of time and frequency resources.
- first PDSCH and second PDSCH are not quasi-co-located (QCL).
- Reception of multiple PDSCHs may be translated as simultaneous reception of PDSCHs that are not of a certain QCL type (eg, QCL type D).
- Multiple PDSCHs from multiple TRPs may be scheduled using one DCI (single DCI, single PDCCH) (single master mode, based on single DCI Multi-TRP (single-DCI based multi-TRP)).
- Multiple PDSCHs from multi-TRP may be scheduled using multiple DCIs (multi-DCI, multiple PDCCH) (multi-master mode, multi-DCI based multi-TRP (multiple PDCCH)). TRP)).
- PDSCH transport block (TB) or codeword (CW) repetition across multi-TRPs.
- repetition schemes URLLC schemes, eg schemes 1, 2a, 2b, 3, 4
- SDM space division multiplexed
- FDM frequency division multiplexed
- RV redundancy version
- the RVs may be the same or different for the multi-TRPs.
- multiple PDSCHs from multiple TRPs are time division multiplexed (TDM).
- TDM time division multiplexed
- multiple PDSCHs from multiple TRPs are transmitted within one slot.
- multiple PDSCHs from multiple TRPs are transmitted in different slots.
- one control resource set (CORESET) in PDCCH configuration information (PDCCH-Config) may correspond to one TRP.
- the UE may determine multi-TRP based on multi-DCI if at least one of the following conditions 1 and 2 is met: In this case, TRP may be read as a CORESET pool index.
- TRP may be read as a CORESET pool index.
- a CORESET pool index of 1 is set.
- Two different values (eg, 0 and 1) of the CORESET pool index are set.
- the UE may determine multi-TRP based on single DCI if the following conditions are met: In this case, two TRPs may be translated into two TCI states indicated by MAC CE/DCI. [conditions] "Enhanced TCI States Activation/Deactivation for UE- specific PDSCH MAC CE)” is used.
- DCI for common beam indication may be a UE-specific DCI format (e.g., DL DCI format (e.g., 1_1, 1_2), UL DCI format (e.g., 0_1, 0_2)), or a UE group common (UE-group common) DCI format.
- DL DCI format e.g., 1_1, 1_2
- UL DCI format e.g., 0_1, 0_2
- UE group common UE-group common
- the unified TCI framework allows UL and DL channels to be controlled by a common framework.
- the unified TCI framework is Rel. Instead of defining TCI conditions or spatial relationships per channel as in 15, a common beam (common TCI condition) may be indicated and applied to all channels in the UL and DL, or for the UL A common beam may be applied to all channels in the UL and a common beam for the DL may be applied to all channels in the DL.
- One common beam for both DL and UL, or a common beam for DL and a common beam for UL (two common beams in total) are being considered.
- the UE may assume the same TCI state (joint TCI state, joint TCI pool, joint common TCI pool, joint TCI state set) for UL and DL.
- the UE assumes different TCI states for each of UL and DL (separate TCI state, separate TCI pool, UL separate TCI pool and DL separate TCI pool, separate common TCI pool, UL common TCI pool and DL common TCI pool).
- the UL and DL default beams may be aligned by MAC CE-based beam management (MAC CE level beam designation).
- the PDSCH default TCI state may be updated to match the default UL beam (spatial relationship).
- DCI-based beam management may indicate common beam/unified TCI state from the same TCI pool for both UL and DL (joint common TCI pool, joint TCI pool, set).
- X (>1) TCI states may be activated by MAC CE.
- the UL/DL DCI may select 1 out of X active TCI states.
- the selected TCI state may apply to both UL and DL channels/RS.
- the TCI pool (set) may be a plurality of TCI states set by RRC parameters, or a plurality of TCI states activated by MAC CE (active TCI state, active TCI pool, set).
- Each TCI state may be a QCL type A/D RS.
- SSB, CSI-RS, or SRS may be set as QCL type A/D RS.
- the number of TCI states corresponding to each of one or more TRPs may be defined. For example, the number N ( ⁇ 1) of TCI states (UL TCI states) applied to UL channels/RSs and the number M ( ⁇ 1) of TCI states (DL TCI states) applied to DL channels/RSs and may be defined. At least one of N and M may be signaled/configured/indicated to the UE via higher layer signaling/physical layer signaling.
- the UE has X UL and DL common TCI states (corresponding to X TRPs) (joint TCI status) is signaled/set/indicated.
- the UE is notified/configured/instructed of a TCI state common to multiple (two) ULs and DLs for multiple (two) TRPs (joint TCI state for multiple TRPs).
- multiple (two) UL TCI states and multiple (two) DL TCI states for multiple (two) TRPs State may mean signaled/set/indicated (separate TCI state for multiple TRPs).
- N and M are 1 or 2
- N and M may be 3 or more, and N and M may be different.
- RRC parameters configure multiple TCI states for both DL and UL.
- the MAC CE may activate multiple TCI states out of multiple configured TCI states.
- a DCI may indicate one of multiple TCI states that have been activated.
- DCI may be UL/DL DCI.
- the indicated TCI state (eg, unified TCI state) may apply to at least one (or all) of the UL/DL channels/RSs.
- One DCI may indicate both UL TCI and DL TCI.
- one point may be one TCI state that applies to both UL and DL, or two TCI states that apply to UL and DL respectively.
- At least one of the multiple TCI states set by the RRC parameters and the multiple TCI states activated by the MAC CE may be called a TCI pool (common TCI pool, joint TCI pool, TCI state pool). good.
- Multiple TCI states activated by a MAC CE may be called an active TCI pool (active common TCI pool).
- RRC parameters higher layer parameters that configure multiple TCI states
- configuration information that configures multiple TCI states, or simply "configuration information.”
- to indicate one of the plurality of TCI states using the DCI may be receiving indication information indicating one of the plurality of TCI states included in the DCI. , it may simply be to receive "instruction information”.
- the RRC parameters configure multiple TCI states (joint common TCI pools) for both DL and UL.
- the MAC CE may activate multiple TCI states (active TCI pool) out of multiple configured TCI states. Separate active TCI pools for each of the UL and DL may be configured/activated.
- a DL DCI or a new DCI format may select (indicate) one or more (eg, one) TCI states.
- the selected TCI state may be applied to one or more (or all) DL channels/RS.
- the DL channel may be PDCCH/PDSCH/CSI-RS.
- the UE is Rel.
- a 16 TCI state operation (TCI framework) may be used to determine the TCI state for each channel/RS in the DL.
- a UL DCI or new DCI format may select (indicate) one or more (eg, one) TCI states.
- the selected TCI state may be applied to one or more (or all) UL channels/RS.
- the UL channel may be PUSCH/SRS/PUCCH.
- different DCIs may indicate UL TCI and DL DCI separately.
- the existing DCI format 1_1/1_2 may be used to indicate common TCI status.
- the DCI format that indicates the TCI status may be a specific DCI format.
- the particular DCI format may be DCI format 1_1/1_2 (defined in Rel. 15/16/17).
- the DCI format (DCI format 1_1/1_2) indicating the TCI state may be a DCI format without DL assignment.
- a DCI format without a DL assignment a DCI format that does not schedule PDSCH (DCI format 1_1/1_2), a DCI format that does not contain one or more specific fields (DCI format 1_1/1_2), one or more A DCI format in which a specific field is set to a fixed value (DCI format 1_1/1_2) may be read interchangeably.
- the specific fields are: TCI field, DCI format identifier field, carrier indicator field, bandwidth part (BWP) indicator field , Time Domain Resource Assignment (TDRA) field, Downlink Assignment Index (DAI) field (if set), Transmission Power Control (for scheduled PUCCH) (TPC)) command field, PUCCH resource indicator field, and PDSCH-to-HARQ feedback timing indicator field (if present), fields other than .
- the particular field may be set as a reserved field or may be ignored.
- the specific fields are Redundancy Version (RV) field, Modulation and Coding Scheme (MCS) field, New Data Indicator field, and Frequency Domain Resource Assignment (FDRA) field.
- RV Redundancy Version
- MCS Modulation and Coding Scheme
- FDRA Frequency Domain Resource Assignment
- All RV fields may be set to 1.
- the MCS field may be set to all ones.
- the NDI field may be set to 0.
- Type 0 FDRA fields may be set to all zeros.
- Type 1 FDRA field may be set to all ones.
- the FDRA field for dynamic switching (higher layer parameter dynamicSwitch) may be set to all zeros.
- a common TCI framework may have separate TCI states for DL and UL.
- the TCI state field (TCI field, up to 3 bit) to indicate one or more TCI states (common TCI state).
- FIG. 2A is a diagram showing an example of joint TCI state indication.
- one joint TCI state (DL/UL joint TCI state) may correspond to one TCI field codepoint.
- the UE may determine the TCI state to apply to the DL channel/signal and the UL channel/signal (DL/UL joint TCI state) based on the codepoints of the indicated TCI field.
- FIG. 2B is a diagram showing an example of a separate TCI state indication.
- one or two TCI states correspond to codepoints in one TCI field.
- Each of the two TCI states may be a DL (separate) TCI state and a UL (separate) TCI state.
- the UE determines the TCI state to apply to DL channels/signals and the TCI state to apply to UL channels/signals based on the codepoints of the indicated TCI field. If the UE is informed of a TCI field codepoint corresponding to only one TCI state (e.g., codepoint "000" in FIG.
- the UE may be notified of an unindicated TCI state (e.g., codepoint "000” in FIG. 2B).
- an unindicated TCI state e.g., codepoint "000” in FIG. 2B.
- 000” case, the UL TCI state may continue/indicate the UL TCI state that applies until the notification.
- a timeline is considered for indication of TCI conditions (which may be referred to as "beam indication") to application of the indicated TCI conditions.
- the timing from reception of the beam indication to application of the TCI state which may be referred to as Beam application timing (BAT) is the transmission of HARQ-ACK for the PDSCH scheduled with the DCI indicating the TCI state.
- the timing may be after a certain time (eg, after K symbols) (see FIG. 3).
- the timing may be at least the first slot after a certain amount of time (eg, K symbols).
- BAT, K symbols, Y symbols, and X [ms] may be read interchangeably.
- the K may be determined based on higher layer signaling (RRC parameters) based on capability information reported by the UE (UE Capability Information, for example, "timeDurationForQCL-rel18").
- RRC parameters higher layer signaling
- UE Capability Information for example, "timeDurationForQCL-rel18"
- the BAT for a specific subcarrier interval may be set for multiple (for example, all) CCs/BWPs in which a common TCI state ID of a common TCI state in carrier aggregation (CA) is set.
- CA carrier aggregation
- the problem is how to set the QCL/TCI state (for example, the default QCL/TCI state) of multi-PDSCH/PUSCH.
- FIG. 4 shows an example where multiple TCI states are activated by MAC CE and a unified TCI state (for example, unified TCI state) is indicated by DCI.
- a DCI that indicates a unified TCI state may be referred to as a beam directed DCI, and may be a DCI that includes a DL assignment (e.g., DL assignment)/UL assignment (e.g., UL grant), or a DCI that does not. There may be.
- TCI state # 2 is indicated as a common beam by the DCI used for PDSCH scheduling, and multi-PDSCHs (here, PDSCH # 1 to # 4 ) is scheduled.
- the problem is how to control the TCI states of multiple PDSCHs #1 to #4.
- FIG. 5 shows an example when one TCI state is activated by MAC CE (for example, when the TCI state activated by MAC CE corresponds to the indicated TCI state).
- TCI state #2 is activated as a common beam by MAC CE included in PDSCH scheduled by DCI, and multi-PDSCH (here, PDSCH # 1 to #4) are scheduled.
- multi-PDSCH here, PDSCH # 1 to #4
- the problem is how to control the TCI states of multiple PDSCHs #1 to #4.
- the present inventors focus on the case where the TCI state update/update timing occurs during multi-PDSCH/PUSCH transmission.
- one aspect of the present embodiment was conceived by studying how to set/apply/determine the QCL assumption/TCI state in such a case.
- A/B/C and “at least one of A, B and C” may be read interchangeably.
- cell, serving cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, band may be read interchangeably.
- indices, IDs, indicators, and resource IDs may be read interchangeably.
- sequences, lists, sets, groups, groups, clusters, subsets, etc. may be read interchangeably.
- supporting, controlling, controllable, operating, and capable of operating may be read interchangeably.
- configure, activate, update, indicate, enable, specify, and select 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
- RRC, RRC signaling, RRC parameters, higher layers, higher layer parameters, RRC information elements (IEs), RRC messages, and configuration may be read interchangeably.
- MAC CE MAC Control Element
- PDU MAC Protocol Data Unit
- MAC CE update command
- activation/deactivation command may be read interchangeably.
- Broadcast information is, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), SIB1), other system It may be information (Other System Information (OSI)) or the like.
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- SIB1 other system It may be information (Other System Information (OSI)) or the like.
- beams, spatial domain filters, spatial settings, TCI states, UL TCI states, unified TCI states, unified beams, common TCI states, common beams, TCI assumptions, QCL assumptions, QCL parameters, spatial Domain Receive Filter, UE Spatial Domain Receive Filter, UE Receive Beam, DL Beam, DL Receive Beam, DL Precoding, DL Precoder, DL-RS, TCI State/QCL Assumed QCL Type D RS, TCI State/QCL Assumed QCL type A RS, spatial relationship, spatial domain transmit filter, UE spatial domain transmit filter, UE transmit beam, UL beam, UL transmit beam, UL precoding, UL precoder, PL-RS may be read interchangeably.
- QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, source of DL-RS, SSB, CSI-RS, SRS may be read interchangeably. good.
- CDM Code Division Multiplexing
- reference signal group reference signal group
- CORESET group Physical Uplink Control Channel
- PUCCH resource group resource (e.g., reference signal resource, SRS resource), resource set (e.g., reference signal resource set), CORESET pool, CORESET subset, downlink Transmission Configuration Indication state (TCI state) (DL TCI state), uplink Link TCI state (UL TCI state), unified TCI state, common TCI state, Quasi-Co-Location (QCL), QCL assumption, redundancy version version (RV)) and layers (multi-input multi-output (MIMO) layer, transmission layer, spatial layer) may be read interchangeably.
- panel identifier (ID) and panel may be read interchangeably.
- TRP ID and TRP may be read interchangeably.
- the panel may relate to at least one of the group index of the SSB/CSI-RS group, the group index of the group-based beam reporting, the group index of the SSB/CSI-RS group for the group-based beam reporting.
- the panel identifier (ID) and the panel may be read interchangeably.
- ID and the panel may be read interchangeably.
- TRP ID and TRP, CORESET group ID and CORESET group, etc. may be read interchangeably.
- TRP transmission point
- panel DMRS port group
- CORESET pool one of two TCI states associated with one codepoint of the TCI field may be read interchangeably.
- single PDCCH may be assumed to be supported when multiple TRPs utilize the ideal backhaul.
- Multi-PDCCH may be assumed to be supported when inter-multi-TRP utilizes non-ideal backhaul.
- the ideal backhaul may also be called DMRS port group type 1, reference signal related group type 1, antenna port group type 1, CORESET pool type 1, and so on.
- Non-ideal backhaul may be referred to as DMRS port group type 2, reference signal associated group type 2, antenna port group type 2, CORESET pool type 2, and so on. Names are not limited to these.
- single (single) TRP, single TRP system, single TRP transmission, and single PDSCH may be read interchangeably.
- multi (multiple) TRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be interchanged.
- a single DCI, a single PDCCH, multiple TRPs based on a single DCI, and activating two TCI states on at least one TCI codepoint may be read interchangeably.
- single TRP channels with single TRP, channels with one TCI state/spatial relationship, multi-TRP not enabled by RRC/DCI, multiple TCI states/spatial relations enabled by RRC/DCI may be interchanged with that no CORESET is set to a CORESETPoolIndex value of 1 for any CORESET, and that no codepoint in the TCI field maps to two TCI states. .
- multi-TRP channels with multi-TRP, channels with multiple TCI state/spatial relationships, multi-TRP enabled by RRC/DCI, multiple TCI state/spatial relationships enabled by RRC/DCI and at least one of multi-TRP based on a single DCI and multi-TRP based on multiple DCIs
- multi-TRPs based on multi-DCI setting a CORESET pool index (CORESETPoolIndex) value of 1 for a CORESET, may be read interchangeably.
- multiple TRPs based on a single DCI, where at least one codepoint of a TCI field is mapped to two TCI states may be read interchangeably.
- TRP#2 Secondary TRP
- single DCI sDCI
- single PDCCH multi-TRP system based on single DCI
- sDCI-based MTRP activating two TCI states on at least one TCI codepoint
- multi-DCI multi-PDCI
- multi-PDCCH multi-PDCCH
- multi-TRP system based on multi-DCI
- the QCL of the present disclosure may be read interchangeably with QCL Type D.
- TCI state A is the same QCL type D as TCI state B
- TCI state A is the same as TCI state B
- TCI state A is TCI state B
- QCL type D in the present disclosure There is” etc. may be read interchangeably.
- single DCI-based multi-TRP repetition may be NCJT for enhanced mobile broadband (eMBB) service (low priority, priority 0), or URL LLC service for ultra-reliable and low latency communications service (high Priority, priority 1) may be repeated.
- eMBB enhanced mobile broadband
- URL LLC ultra-reliable and low latency communications service
- PDSCH for multiple TRPs based on a single DCI may be interchanged with PDSCH to which TDM/FDM/SDM for multiple TRPs (defined in Rel. 16) is applied.
- PDSCH for multiple TRPs may be interchanged with PDSCH to which TDM/FDM/SDM for multiple TRPs based on a single DCI (defined in Rel.16) is applied.
- PUSCH/PUCCH/PDCCH for multiple TRPs based on a single DCI is repeated transmission (repetition) of PUSCH/PUCCH/PDCCH for multiple TRPs (defined after Rel.17). It may be reread.
- UL transmission with multiple panels may refer to a UL transmission scheme with multiple panels of the UE with DCI enhancement.
- the joint TCI state/separate TCI state in the unified TCI state framework is not applicable to each channel/signal, determine the TCI state/QCL/spatial relationship for each channel. To do so, the default TCI state/QCL/spatial relationships described above may be used.
- applying TCI conditions to each channel/signal/resource may mean applying TCI conditions to transmission and reception of each channel/signal/resource.
- “highest (maximum)” and “lowest (minimum)” may be read interchangeably.
- “maximum” may be read as “the nth (n is an arbitrary natural number)” larger, higher, higher, or the like.
- “minimum” may be read as “nth (n is any natural number) smaller", smaller, lower, and the like.
- repetition, repeated transmission, and repeated reception may be read interchangeably.
- channels, signals, and channels/signals may be read interchangeably.
- DL channel, DL signal, DL signal/channel, transmission/reception of DL signal/channel, DL reception, and DL transmission may be read interchangeably.
- UL channel, UL signal, UL signal/channel, transmission/reception of UL signal/channel, UL reception, and UL transmission may be read interchangeably.
- a first TCI state may correspond to a first TRP.
- a second TCI state may correspond to a second TRP.
- the nth TCI state may correspond to the nth TRP.
- a first CORESET pool index value (eg, 0), a first TRP index value (eg, 1), and a first TCI state (first DL/UL (joint/separate) TCI states) may correspond to each other.
- a second CORESET pool index value (eg, 1), a second TRP index value (eg, 2), and a second TCI state (second DL/UL (joint/separate) TCI states) may correspond to each other.
- the TCI state is updated by DCI/MAC CE or the like as an example, but the present embodiment is not limited to this.
- the TCI state list (or TCI state pool) set by higher layer parameters, etc.
- the active TCI state (or active TCI state list) activated by MAC CE, also in the middle of multi-physical shared channel transmission
- the contents of the following embodiments may be applied.
- repeated transmission or multi-PDSCH/multi-PUSCH of a physical shared channel (eg, PDSCH/PUSCH) will be described as an example, but repeated transmission of other channels/reference signals (eg, multi-PDCCH, multi-PUCCH, etc.).
- the unified TCI state will be described as an example of the TCI state instructed by the network (eg, base station) to the UE, but it is not limited to this.
- the embodiments may be applied to TCI states other than unified TCI states (eg, TCI states supported by Rel. 15/16), spatial relationships, or SRI indications.
- the TCI state indicated by the network (eg, base station) to the UE may be indicated/activated/configured by DCI/MAC CE/RRC.
- the DCI that indicates the TCI state may be the DCI that schedules the multi-PDSCH/multi-PUSCH, or may be another DCI.
- a TCI state update timing is set in the middle of a period in which a plurality of physical shared channels (hereinafter also referred to as shared channels) are transmitted, a predetermined TCI state is set for the plurality of shared channels. are commonly applied/set.
- the multiple shared channels may be at least one of multi-PDSCH transmission and multi-PUSCH transmission. Multiple PDSCH transmissions/multiple PUSCH transmissions may be scheduled/activated by a single DCI or may be scheduled/activated by multiple DCIs. Information about the updated TCI status may be notified by DCI/MAC CE/RRC.
- the TCI state may be a unified TCI state. The unified TCI state may be read as joint TCI state/separate TCI state.
- FIG. 6 shows that multiple shared channels (here, multi-PDSCH #1 to #4) are scheduled by the same DCI, and in the middle of the period in which the multi-PDSCH #1 to #4 are transmitted (here, PDSCH #2). It shows a case where the unified TCI state update timing is set between the transmission start timing and the transmission start timing of PDSCH#3. Although the case where PDSCH is scheduled is shown here, PDSCH may be replaced with PUSCH.
- the UE receives first information (eg, DCI) scheduling multiple PDSCHs and second information (eg, DCI/MAC CE) indicating the TCI state.
- first information eg, DCI
- second information eg, DCI/MAC CE
- the UE may commonly apply a predetermined TCI state to multi-PDSCH #1 to #4.
- the TCI state applied to the first PDSCH (here, PDSCH #1) of the multi-PDSCH (or the first PDSCH #1 is the indicated TCI state corresponding to ). That is, the UE assumes/applies the TCI state (eg, the old unified TCI state) before the update timing to the multi-PDSCH (eg, PDSCH #3, #4) even in the period after the TCI state update timing. do.
- the old unified TCI state may be a TCI state indicated/activated by DCI/MAC CE before the update timing, or a TCI state determined by a predetermined rule. (eg, default TCI state).
- the UE may assume/apply the updated TCI state to other channels/reference signals in the period after the TCI state update timing.
- the predetermined TCI state commonly applied to each multi-shared channel is not limited to the first shared channel among the multi-shared channels, but may be other shared channels.
- the predetermined TCI state may be the TCI state applied to the last shared channel/predetermined-th shared channel (or the indicated TCI state corresponding to the last shared channel/predetermined-th shared channel). good.
- the predetermined TCI state may be the TCI state applied to the shared channel of the first/last/predetermined-th symbol or the first/last/predetermined-th slot.
- the pre-determined TCI state may be defined in the specification or configured from the base station to the UE by higher layer parameters.
- the update timing of the multi-PDSCH/multi-PUSCH beam (or TCI state) and the update timing of the other channel/reference signal beam are applied separately (for example, the beam A difference may occur in update timing).
- the TCI state before the beam update timing eg, the old unified TCI state
- the TCI state after updating eg, the new unified TCI state
- other channels/reference signals. may be applied.
- the UE may prefer either TCI state for transmission/reception processing.
- the UE controls to transmit/receive only channels/reference signals with high priority, and controls other channels/reference signals with low priority not to transmit/receive (eg, drop). You may Alternatively, the UE may transmit/receive both high priority channels/reference signals and low priority channels/reference signals based on the TCI conditions corresponding to the high priority channels/reference signals. can be controlled to
- the priority corresponding to the channel/reference signal may be determined based on a predetermined rule, or may be set in the UE from the base station using higher layer parameters.
- the predetermined rule is at least one of channel type/type, channel/reference signal start or end timing, channel/reference signal start or end timing to trigger/schedule, and frequency region to which each channel/reference signal is assigned.
- the priority may be determined based on whether it is multi-PDSCH/PUSCH or other channels/reference signals (eg, other channels/reference signals have priority). Alternatively, the priority may be determined based on the index of the start symbol/end symbol of the channel/reference signal (eg, earlier start symbols have higher priority). Alternatively, the priority may be determined based on the start/end symbol index of the DCI that triggers/schedules the channel/RS (eg, the later end symbol of DCI takes precedence). Alternatively, the priority may be determined based on the frequency index (PRB/CC) to which the channel/RS is assigned (for example, priority is given to the smaller CC index).
- PRB/CC frequency index
- transmission/reception of either one may be prioritized.
- This allows UEs that do not have UE capability of simultaneous reception of different beams (or do not report the UE capability) to support reception of channels/reference signals of different beams (e.g., QCL type D) on the same symbol.
- channels/reference signals of different beams e.g., QCL type D
- the same TCI state (or one TCI state) may be indicated for multiple PDSCHs (here, PDSCH #1 to #4), or different TCI states (for example, two TCI state) may be indicated.
- Different TCI states may correspond to different CORESET pool indices or may correspond to the same CORESET pool index.
- some PDSCHs e.g. PDSCH #1/#3 (e.g. cyclic mapping), or PDSCH #1, #2 (eg, sequential mapping) corresponds to a first TCI state
- other PDSCHs e.g, PDSCH #2/#4, or PDSCH #3, #4
- the update timing to the first TCI state and the update timing to the second TCI state may be the same.
- the update timing to the first TCI state and the update timing to the second TCI state may be set differently.
- a common TCI state (for example, the old first TCI state) may be applied to some PDSCHs before and after the update timing to the first TCI state (or regardless of the update timing). Also, for other PDSCHs, before and after the update timing to the second TCI state (or regardless of the update timing), even if a common TCI state (for example, the old second TCI state) is applied. good.
- each shared channel is determined based on the update timing of the TCI state/transmission timing of each shared channel. are applied/set separately.
- the multiple shared channels may be at least one of multi-PDSCH transmission and multi-PUSCH transmission. Multiple PDSCH transmissions/multiple PUSCH transmissions may be scheduled/activated by a single DCI or may be scheduled/activated by multiple DCIs. Information about the updated TCI status may be notified by DCI/MAC CE/RRC.
- the TCI state may be a unified TCI state.
- FIG. 7 shows that a plurality of shared channels (here, multi-PDSCH #1 to #4) are scheduled by the same DCI, and in the middle of the period in which the multi-PDSCH #1 to #4 are transmitted (here, PDSCH #2 It shows a case where the unified TCI state update timing is set between the transmission start timing and the transmission start timing of PDSCH#3. Although the case where PDSCH is scheduled is shown here, PDSCH may be replaced with PUSCH.
- the UE receives first information (eg, DCI) scheduling multiple PDSCHs and second information (eg, DCI/MAC CE) indicating the TCI state.
- first information eg, DCI
- second information eg, DCI/MAC CE
- the UE performs each PDSCH #1 to #4 on the multi-PDSCH #1 to #4 based on the TCI state update timing.
- the assumed/applied TCI state for each PDSCH #1 to #4 may be the TCI state (eg, indicated TCI state) applied at the time of reception of each PDSCH (at the time of transmission in the case of PUSCH).
- the TCI state applied at the time of reception of each PDSCH may be the TCI state corresponding to the first/last/predetermined symbol (or slot) in each PDSCH.
- FIG. 7 shows the case of the TCI state in the first symbol (eg, start symbol) of each PDSCH.
- the UE applies the pre-update TCI state (old unified TCI state) to PDSCH #1 and #2 whose starting symbols are scheduled before the TCI state update timing.
- the old unified TCI state (or old TCI state) may be a TCI state indicated/activated by DCI/MAC CE before the update timing, or a TCI state determined by a predetermined rule. (eg, default TCI state).
- the UE applies the updated TCI state (new unified TCI state) for PDSCH #3 and #4 whose starting symbols are scheduled after the TCI state update timing. Also, after the timing of the TCI state, the UE assumes/applies the same TCI state (eg, new unified TCI state) for multi-PDSCH (here, PDSCH #3, #4) and other channels/reference signals. You may
- multi-PDSCH/multi-PUSCH transmission by separately assuming/applying/setting the TCI state of each PDSCH/PUSCH based on the TCI state update timing, multi-PDSCH/multi-PUSCH and other channels / It is possible to unify the beam update timing with the reference signal. This simplifies TCI state/beam control for multiple types of channels/reference signals in the UE/base station.
- FIG. 7 shows a case where the same TCI state update timing is applied to PDSCH #3/#4 and other channels/reference signals.
- a sufficient time for example, A case where there is no guard period is also conceivable.
- switching of the reception beam in the UE may not be in time for reception of PDSCH #3 (for example, reception of the start symbol of PDSCH #3).
- Control may be performed so that the first shared channel transmission after the TCI state update timing (or beam update timing) is not performed (see FIG. 8).
- the UE indicates that the first PDSCH after the TCI state update timing (eg, PDSCH #3 in FIG. 8) is transmitted. No need to assume.
- the UE controls not to receive the first PDSCH (eg, PDSCH #3 in FIG. 8) after the TCI state update timing (or controls to skip the reception process of the PDSCH #3). You may
- the UE controls not to transmit the first PUSCH of the TCI state update timing (or performs the PUSCH transmission process. control to skip).
- a predetermined period (eg, guard period/gap/time offset x) exists between the last shared channel before the TCI state update timing (or beam update timing) and the first shared channel after the TCI state update timing. may be set (see FIG. 9).
- the first PDSCH eg, PDSCH #3 in FIG. 9 after the TCI state update timing is used for the TCI state update. It may be assumed that it is scheduled at least a predetermined number of symbols after the last PDSCH (eg, PDSCH #2 in FIG. 9) before timing.
- An offset may be set.
- Option 2-1/Option 2-2 may be applied/supported only for a specific subcarrier spacing (SCS).
- SCS subcarrier spacing
- a specific SCS may be, for example, an SCS equal to or greater than a predetermined value (eg, 480 kHz/960 kHz).
- Option 2-1 and Option 2-2 may be applied in combination.
- the UE For example, from the last symbol of the last PDSCH before the update timing of the TCI state to the start symbol of the first PDSCH after the update timing of the TCI state when the schedule is set so that at least a period of x symbols is set , the UE expects the first PDSCH after the update timing to be transmitted (or receives the first PDSCH after the update timing). Otherwise, the UE does not expect the first PDSCH after the update timing to be transmitted (or does not receive/skip reception of the first PDSCH after the update timing).
- the same TCI state (or one TCI state) may be indicated for multiple PDSCHs (here, PDSCH #1 to #4), or different TCI states (for example, two TCI states) may be indicated.
- Different TCI states may correspond to different CORESET pool indices or may correspond to the same CORESET pool index.
- some PDSCHs e.g. PDSCH #1/#3 (e.g. cyclic mapping), or PDSCH #1, #2 (eg, sequential mapping) corresponds to a first TCI state
- other PDSCHs e.g, PDSCH #2/#4, or PDSCH #3, #4
- the update timing to the first TCI state and the update timing to the second TCI state may be the same.
- the update timing to the first TCI state and the update timing to the second TCI state may be set differently.
- the UE updates to the first TCI state and the second TCI state based on the update timing. Each should be controlled.
- 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 connect 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 path interface 140 may be provided.
- this example mainly shows the functional blocks of the features of 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 (for example, 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 transmitting unit and receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140.
- the transmitting/receiving unit 120 may transmit downlink first information indicating a schedule of multiple physical shared channel transmissions and second information indicating a unified transmission configuration indicator (TCI).
- TCI transmission configuration indicator
- the control unit 110 sets a predetermined TCI state for a plurality of physical shared channel transmissions. You may control so that it may apply commonly.
- the control unit 110 sets the update timing of the unified TCI state and each physical shared channel.
- the TCI conditions applied to each physical shared channel transmission may be separately controlled based on the timing of the channel transmissions.
- 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 measuring 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 transmitting/receiving unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (eg, RLC retransmission control), MAC layer processing (eg, , HARQ retransmission control) and the like may be performed to generate a bit string to be transmitted.
- RLC layer processing eg, RLC retransmission control
- MAC layer processing eg, HARQ retransmission control
- the transmission/reception 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 transform precoding settings. Transmitting/receiving unit 220 (transmission processing unit 2211), for a certain channel (for example, PUSCH), if transform precoding 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 transmitting/receiving unit 220 may receive downlink first information indicating scheduling of multiple physical shared channel transmissions and second information indicating a unified transmission configuration indicator (TCI).
- TCI transmission configuration indicator
- the control unit 210 sets a predetermined TCI state for a plurality of physical shared channel transmissions. You may control so that it may be commonly applied.
- a given TCI state may be a TCI state that applies to a particular physical shared channel transmission among a plurality of physical shared channel transmissions.
- the control unit 210 controls the update timing of the unified TCI state and each physical shared channel.
- the TCI conditions applied to each physical shared channel transmission may be separately controlled based on the timing of the channel transmissions.
- control unit 210 controls not to perform transmission processing or reception processing for the first physical shared channel transmission after the unified TCI state update timing among a plurality of physical shared channel transmissions, or controls the unified TCI state. Even assuming that there is a predetermined period (e.g. gap/guard period/offset) between the last physical shared channel transmission before the update timing of the unified TCI state and the first physical shared channel transmission after the unified TCI state update timing. good.
- a predetermined period e.g. gap/guard period/offset
- each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separated devices (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, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- 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 signal/channel 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 moving object, the mobile itself, or the like.
- the moving body refers to a movable object, the speed of movement is arbitrary, and it naturally includes cases where the moving body is stationary.
- Examples of such moving bodies include vehicles, transportation vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, carts, rickshaws, and ships (ships and other watercraft). , airplanes, rockets, satellites, drones, multi-copters, quad-copters, balloons and objects mounted on them.
- the mobile body may be a mobile body that autonomously travels based on an operation command.
- 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 ).
- a vehicle e.g., car, airplane, etc.
- an unmanned mobile object e.g., drone, self-driving car, etc.
- 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
- FIG. 14 is a diagram showing an example of a vehicle according to one embodiment.
- the vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (current sensor 50, revolution sensor 51, air pressure sensor 52, vehicle speed sensor 53, acceleration sensor 54, accelerator pedal sensor 55, brake pedal sensor 56, shift lever sensor 57, and object detection sensor 58), information service unit 59 and communication module 60.
- various sensors current sensor 50, revolution sensor 51, air pressure sensor 52, vehicle speed sensor 53, acceleration sensor 54, accelerator pedal sensor 55, brake pedal sensor 56, shift lever sensor 57, and object detection sensor 58
- information service unit 59 and communication module 60.
- the driving unit 41 is composed of, for example, at least one of an engine, a motor, and a hybrid of an engine and a motor.
- the steering unit 42 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.
- the electronic control unit 49 is composed of a microprocessor 61 , a memory (ROM, RAM) 62 , and a communication port (eg, input/output (IO) port) 63 . Signals from various sensors 50 to 58 provided in the vehicle are input to the electronic control unit 49 .
- the electronic control unit 49 may be called an Electronic Control Unit (ECU).
- ECU Electronic Control Unit
- the signals from the various sensors 50 to 58 include a current signal from the current sensor 50 that senses the current of the motor, a rotation speed signal of the front wheels 46/rear wheels 47 obtained by the rotation speed sensor 51, and an air pressure sensor 52.
- air pressure signal of front wheels 46/rear wheels 47 vehicle speed signal obtained by vehicle speed sensor 53, acceleration signal obtained by acceleration sensor 54, depression amount signal of accelerator pedal 43 obtained by accelerator pedal sensor 55, brake pedal sensor
- the information service unit 59 includes various devices such as car navigation systems, audio systems, speakers, displays, televisions, and radios for providing (outputting) various information such as driving information, traffic information, and entertainment information, and these devices. and one or more ECUs that control The information service unit 59 provides various information/services (for example, multimedia information/multimedia services) to the occupants of the vehicle 40 using information acquired from an external device via the communication module 60 or the like.
- various information/services for example, multimedia information/multimedia services
- the information service unit 59 may include an input device (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) that receives input from the outside, and an output device that outputs to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).
- an input device e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.
- an output device e.g., display, speaker, LED lamp, touch panel, etc.
- the driving support system unit 64 includes a millimeter wave radar, Light Detection and Ranging (LiDAR), a camera, a positioning locator (e.g., Global Navigation Satellite System (GNSS), etc.), map information (e.g., High Definition (HD)) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., inertial measurement units (IMU), inertial navigation systems (INS), etc.), artificial intelligence ( Artificial intelligence (AI) chips, AI processors, and other devices that provide functions to prevent accidents and reduce the driver's driving load, and one or more devices that control these devices ECU.
- the driving support system unit 64 transmits and receives various information via the communication module 60, and realizes a driving support function or an automatic driving function.
- the communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63 .
- the communication module 60 communicates with the vehicle 40 through a communication port 63 such as a driving unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, Data (information) is transmitted and received between the axle 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and various sensors 50-58.
- the communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from an external device via wireless communication.
- Communication module 60 may be internal or external to electronic control 49 .
- the external device may be, for example, the above-described base station 10, user terminal 20, or the like.
- the communication module 60 may be, for example, the above-described base station 10, user terminal 20, etc. (may function as the base station 10, user terminal 20, etc.).
- the communication module 60 receives signals from the various sensors 50 to 58 described above input to the electronic control unit 49, information obtained based on the signals, and input from the outside (user) obtained via the information service unit 59. may be transmitted to the external device via wireless communication.
- the electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be called an input unit that receives input.
- the PUSCH transmitted by communication module 60 may include information based on the above inputs.
- the communication module 60 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 59 provided in the vehicle.
- the information service unit 59 is an output unit that outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH received by the communication module 60 (or data/information decoded from the PDSCH)). may be called
- the communication module 60 stores various information received from an external device in a memory 62 that can be used by the microprocessor 61 . Based on the information stored in the memory 62, the microprocessor 61 controls the drive unit 41, the steering unit 42, the accelerator pedal 43, the brake pedal 44, the shift lever 45, the left and right front wheels 46, and the left and right rear wheels provided in the vehicle 40. 47, axle 48, and various sensors 50-58 may be controlled.
- 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 "uplink” and “downlink” may be replaced with words corresponding to communication between terminals (for example, "sidelink”).
- uplink channels, downlink channels, etc. may be read as sidelink 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 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 any other suitable wireless communication method. It may be applied to a system to be used, a next-generation system extended, modified, created or defined based on these.
- 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, “determine (determine)” may be regarded as “determining (determining)” some action.
- Maximum transmit power described in this disclosure may mean the maximum value of transmit power, may mean the nominal maximum transmit power (the nominal UE maximum transmit power), or may mean the rated maximum transmit power (the rated UE maximum transmit power).
- 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、送信設定指示状態(Transmission Configuration Indication state(TCI状態))に基づいて、信号及びチャネルの少なくとも一方(信号/チャネルと表現する)のUEにおける受信処理(例えば、受信、デマッピング、復調、復号の少なくとも1つ)、送信処理(例えば、送信、マッピング、プリコーディング、変調、符号化の少なくとも1つ)を制御することが検討されている。
・QCLタイプA(QCL-A):ドップラーシフト、ドップラースプレッド、平均遅延及び遅延スプレッド、
・QCLタイプB(QCL-B):ドップラーシフト及びドップラースプレッド、
・QCLタイプC(QCL-C):ドップラーシフト及び平均遅延、
・QCLタイプD(QCL-D):空間受信パラメータ。
Rel.16において、PDSCHは、TCIフィールドを有するDCIでスケジュールされてもよい。PDSCHのためのTCI状態は、TCIフィールドによって指示される。DCIフォーマット1-1のTCIフィールドは3ビットであり、DCIフォーマット1-2のTCIフィールドは最大3ビットである。
NRでは、1つ又は複数の送受信ポイント(Transmission/Reception Point(TRP))(マルチTRP(multi TRP(MTRP)))が、1つ又は複数のパネル(マルチパネル)を用いて、UEに対してDL送信を行うことが検討されている。また、UEが、1つ又は複数のTRPに対して、1つ又は複数のパネルを用いて、UL送信を行うことが検討されている。
[条件1]
1のCORESETプールインデックスが設定される。
[条件2]
CORESETプールインデックスの2つの異なる値(例えば、0及び1)が設定される。
[条件]
DCI内のTCIフィールドの1つのコードポイントに対する1つ又は2つのTCI状態を指示するために、「UE固有PDSCH用拡張TCI状態アクティベーション/ディアクティベーションMAC CE(Enhanced TCI States Activation/Deactivation for UE-specific PDSCH MAC CE)」が用いられる。
統一TCIフレームワークによれば、UL及びDLのチャネルを共通のフレームワークによって制御できる。統一TCIフレームワークは、Rel.15のようにTCI状態又は空間関係をチャネルごとに規定するのではなく、共通ビーム(共通TCI状態)を指示し、それをUL及びDLの全てのチャネルへ適用してもよいし、UL用の共通ビームをULの全てのチャネルに適用し、DL用の共通ビームをDLの全てのチャネルに適用してもよい。
Rel.17以降において、UEに対し、DCIフォーマット(例えば、DLアサインメントなし/ありのDCIフォーマット1_1/1_2(DCI format 1_1/1_2 without/with DL assignment))に含まれるTCI状態フィールド(TCIフィールド、最大3ビット)を用いて、1つ以上のTCI状態(共通TCI状態)が指示されることが検討されている。
Rel.17以降において、TCI状態の指示(「ビーム指示」と呼ばれてもよい)から指示されたTCI状態の適用までに関するタイムラインが検討されている。ビーム指示受信後からTCI状態の適用までのタイミング(ビーム適用タイミング(Beam application timing(BAT))と呼ばれてもよい)は、TCI状態を指示するDCIでスケジュールされるPDSCHに対するHARQ-ACKの送信後から、特定の時間後(例えば、Kシンボル後)までのタイミングであってもよい(図3参照)。そのタイミングは、少なくとも特定の時間(例えば、Kシンボル)の後の最初のスロットであってもよい。本開示において、BAT、Kシンボル、Yシンボル、X[ms]、は互いに読み替えられてもよい。
以下の説明では、TCI状態がDCI/MAC CE等により更新される場合を例に挙げて説明するが、本実施の形態はこれに限られない。例えば、上位レイヤパラメータ等で設定されるTCI状態リスト(又は、TCI状態プール)、MAC CEによりアクティブ化されるアクティブTCI状態(又は、アクティブTCI状態リスト)についても、マルチ物理共有チャネル送信の途中で更新される場合、下記の実施形態の内容が適用されてもよい。
第1の実施形態は、複数の物理共有チャネル(以下、共有チャネルとも記す)が送信される期間の途中にTCI状態の更新タイミングが設定される場合に、当該複数の共有チャネルに所定のTCI状態を共通に適用/設定される場合について説明する。
第2の実施形態は、複数の共有チャネルが送信される期間の途中にTCI状態の更新タイミングが設定される場合に、TCI状態の更新タイミング/各共有チャネルの送信タイミングに基づいて、各共有チャネルのTCI状態が別々に適用/設定される場合について説明する。
TCI状態の更新タイミング(又は、ビーム更新タイミング)後の最初の共有チャネルの送信が行われないように制御してもよい(図8参照)。例えば、UEは、マルチPDSCHの送信期間の途中にTCI状態の更新タイミングが設定される場合、TCI状態の更新タイミング後の最初のPDSCH(例えば、図8のPDSCH#3)が送信されることを想定しなくてもよい。又は、UEは、TCI状態の更新タイミング後の最初のPDSCH(例えば、図8のPDSCH#3)の受信を行わないように制御(又は、当該PDSCH#3の受信処理をスキップするように制御)してもよい。
TCI状態の更新タイミング(又は、ビーム更新タイミング)前の最後の共有チャネルと、TCI状態の更新タイミング後の最初の共有チャネルと、間に所定期間(例えば、ガード期間/ギャップ/時間オフセットx)が設定されてもよい(図9参照)。例えば、UEは、マルチPDSCHの送信期間の途中にTCI状態の更新タイミングが設定される場合、TCI状態の更新タイミング後の最初のPDSCH(例えば、図9のPDSCH#3)が、TCI状態の更新タイミング前の最後のPDSCH(例えば、図9のPDSCH#2)から少なくとも所定シンボル後にスケジュールされると想定してもよい。
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)
- 複数の物理共有チャネル送信のスケジュールを指示する下り第1の情報と、統一送信コンフィグレーション指標(TCI)を指示する第2の情報と、を受信する受信部と、
前記第2の情報により指示された統一TCI状態の更新タイミングが前記複数の物理共有チャネル送信が行われる期間の途中に設定される場合、前記複数の物理共有チャネル送信に所定のTCI状態を共通に適用するように制御する制御部と、を有する端末。 - 前記所定のTCI状態は、前記複数の物理共有チャネル送信のうち特定の物理共有チャネル送信に適用されるTCI状態である請求項1に記載の端末。
- 複数の物理共有チャネル送信のスケジュールを指示する下り第1の情報と、統一送信コンフィグレーション指標(TCI)を指示する第2の情報と、を受信する受信部と、
前記第2の情報により指示された統一TCI状態の更新タイミングが前記複数の物理共有チャネル送信が行われる期間の途中に設定される場合、前記統一TCI状態の更新タイミングと各物理共有チャネル送信のタイミングとに基づいて、前記各物理共有チャネル送信に適用するTCI状態をそれぞれ別々に制御する制御部と、を有する端末。 - 前記制御部は、前記複数の物理共有チャネル送信のうち、前記統一TCI状態の更新タイミング後の最初の物理共有チャネル送信について、送信処理又は受信処理を行わないように制御する、又は、前記統一TCI状態の更新タイミング前の最後の物理共有チャネル送信と前記統一TCI状態の更新タイミング後の最初の物理共有チャネル送信との間に所定期間が設けられると想定する請求項3に記載の端末。
- 複数の物理共有チャネル送信のスケジュールを指示する下り第1の情報と、統一送信コンフィグレーション指標(TCI)を指示する第2の情報と、を受信する工程と、
前記第2の情報により指示された統一TCI状態の更新タイミングが前記複数の物理共有チャネル送信が行われる期間の途中に設定される場合、前記複数の物理共有チャネル送信に所定のTCI状態を共通に適用するように制御する工程と、を有する端末の無線通信方法。 - 複数の物理共有チャネル送信のスケジュールを指示する下り第1の情報と、統一送信コンフィグレーション指標(TCI)を指示する第2の情報と、を送信する送信部と、
前記第2の情報により指示された統一TCI状態の更新タイミングが前記複数の物理共有チャネル送信が行われる期間の途中に設定される場合、前記複数の物理共有チャネル送信に所定のTCI状態を共通に適用するように制御する制御部と、を有する基地局。
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LENOVO, MOTOROLA MOBILITY: "Remaining issues on beam-management for NR from 52.6 GHz to 71GHz", 3GPP DRAFT; R1-2200672, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-meeting; 20220117 - 20220125, 11 January 2022 (2022-01-11), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052093363 * |
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