WO2023079633A1 - 端末、無線通信方法及び基地局 - Google Patents
端末、無線通信方法及び基地局 Download PDFInfo
- Publication number
- WO2023079633A1 WO2023079633A1 PCT/JP2021/040601 JP2021040601W WO2023079633A1 WO 2023079633 A1 WO2023079633 A1 WO 2023079633A1 JP 2021040601 W JP2021040601 W JP 2021040601W WO 2023079633 A1 WO2023079633 A1 WO 2023079633A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- csi
- coreset
- tci
- qcl
- tci state
- Prior art date
Links
- 238000004891 communication Methods 0.000 title description 77
- 238000000034 method Methods 0.000 title description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 105
- 238000012545 processing Methods 0.000 description 55
- 238000010586 diagram Methods 0.000 description 30
- 230000006870 function Effects 0.000 description 27
- 238000005259 measurement Methods 0.000 description 26
- 230000011664 signaling Effects 0.000 description 24
- 238000012937 correction Methods 0.000 description 10
- 230000009977 dual effect Effects 0.000 description 10
- 238000010295 mobile communication Methods 0.000 description 9
- 238000013507 mapping Methods 0.000 description 8
- 230000004913 activation Effects 0.000 description 7
- 230000009849 deactivation Effects 0.000 description 7
- 238000001914 filtration Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000007726 management method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 101100020598 Homo sapiens LAPTM4A gene Proteins 0.000 description 3
- 102100034728 Lysosomal-associated transmembrane protein 4A Human genes 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 3
- 238000013473 artificial intelligence Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 101150075071 TRS1 gene Proteins 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000013468 resource allocation Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004929 transmission Raman spectroscopy Methods 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 1
- 108700026140 MAC combination Proteins 0.000 description 1
- 101150071746 Pbsn gene Proteins 0.000 description 1
- 101150096310 SIB1 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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
- PDCCH physical downlink control channel
- CORESET control resource set
- a specific reference signal for example, channel state information reference signal (CSI-RS)
- CSI-RS channel state information reference signal
- QCL Quality of Service
- one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that appropriately determine the QCL of a specific reference signal.
- TCI Transmission Configuration Indication
- 1A and 1B are diagrams illustrating an example of communication between a mobile and a transmission point (eg, RRH).
- 2A-2C are diagrams showing examples of schemes 0-2 for SFN.
- 3A and 3B are diagrams showing an example of Scheme 1.
- FIG. 4A-4C are diagrams illustrating an example of a Doppler precompensation scheme.
- 5A and 5B are diagrams showing examples of TCI states of CSI-RSs according to the first embodiment.
- FIG. 6 is a diagram illustrating an example of TCI states of CSI-RSs according to the modification of the first embodiment.
- FIG. 7 is a diagram showing an example of default QCL determination according to Embodiment 2-2-1.
- FIG. 8 is a diagram showing an example of default QCL determination according to the embodiment 2-2-2.
- FIG. 9 is a diagram showing an example of default QCL determination according to the embodiment 2-2-3.
- 10A-10C are diagrams illustrating an example of overlap between A-CSI-RS and other DL signals.
- FIG. 11 is a diagram illustrating an example of a schematic configuration of a radio communication system according to an embodiment.
- FIG. 12 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- FIG. 13 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment;
- FIG. 14 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment.
- FIG. 15 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-colocation (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 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 called QCL parameters) are shown below: QCL type A (QCL-A): Doppler shift, Doppler spread, mean delay and delay spread, QCL type B (QCL-B): Doppler shift and Doppler spread, QCL type C (QCL-C): Doppler shift and mean delay; • QCL Type D (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.
- Path loss PL b, f, c (q d ) [dB] in transmission power control of each of PUSCH, PUCCH, and SRS is a reference signal for downlink BWP (RS, It is calculated by the UE using the pathloss reference RS (PathlossReferenceRS) index qd .
- pathloss reference RS, pathloss(PL)-RS, index q d , RS used for pathloss calculation, and RS resource used for pathloss calculation may be read interchangeably.
- calculation, estimation, measurement, and track may be used interchangeably.
- pathloss RS is updated by MAC CE, it is being considered whether to change the existing mechanism of higher layer filtered RSRP for pathloss measurement.
- pathloss measurement based on L1-RSRP may be applied.
- the higher layer filter RSRP is used for pathloss measurement, even if L1-RSRP is used for pathloss measurement before the higher layer filter RSRP is applied. good.
- the higher layer filter RSRP is used for the pathloss measurement, and before that timing the upper layer filter RSRP of the previous pathloss RS may be used. . Rel. 15, a higher layer filter RSRP is used for pathloss measurement, and the UE may track all pathloss RS candidates configured by RRC.
- the maximum number of pathloss RSs configurable by RRC may depend on UE capabilities. If the maximum number of pathloss RSs that can be configured by RRC is X, X or less pathloss RS candidates may be configured by RRC, and a pathloss RS may be selected by MAC CE from among the configured pathloss RS candidates.
- the maximum number of pathloss RSs configurable by RRC may be 4, 8, 16, 64, and so on.
- the upper layer filter RSRP, filtered RSRP, and layer 3 filtered RSRP may be read interchangeably.
- 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 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 for the QCL parameters associated with the two TCI states corresponding to the lowest of the TCI codepoints including 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.
- 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 as PDSCH default TCI states in 2015/16.
- 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)).
- 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
- multi-TRP PDCCH For the reliability of multi-TRP PDCCHs based on non-single frequency networks (SFN), the following considerations 1 to 3 are considered.
- Consideration 1 Coding/rate matching is based on one repetition, and the same coded bits are repeated in other repetitions.
- Consideration 2 Each iteration has the same number of control channel elements (CCEs), the same coded bits, and corresponds to the same DCI payload.
- CCEs control channel elements
- Two or more PDCCH candidates are explicitly linked together. UE knows the link before decoding.
- Two sets of PDCCH candidates (within a given search space (SS) set) are associated with two TCI states of CORESET, respectively.
- same CORESET, same SS set, PDCCH repetitions in different monitoring occasions are used.
- Two sets of PDCCH candidates are associated with two SS sets respectively. Both SS sets are associated with a CORESET and each SS set is associated with only one TCI state of that CORESET. Here the same CORESET, two SS sets, is used.
- CORESETPoolIndex (which may be called TRP Info) is set for one CORESET.
- SFN single frequency network
- RRC signaling/MAC CE higher layer signaling
- each search space set is associated with the corresponding CORESET (enhancement 2 ).
- the two search space sets may be associated with the same or different CORESETs.
- one (maximum one) TCI state can be set/activated in higher layer signaling (RRC signaling/MAC CE).
- two search space sets are associated with different CORESETs with different TCI states, it may imply a repeated transmission of multi-TRP. If two search space sets are associated with the same CORESET (with the same TCI state CORESET), it may imply repeated transmission of a single TRP.
- HST High speed trains
- Large antennas transmit into/out of tunnels.
- the transmission power of a large antenna is about 1 to 5W.
- the transmission power of a small antenna is approximately 250 mW.
- Multiple small antennas transmit and receive points
- SFN single frequency network
- All small antennas within the SFN transmit the same signal at the same time on the same PRB. It is assumed that a terminal transmits and receives to one base station. In practice, multiple transmit/receive points transmit the same DL signal.
- transmission/reception points in units of several kilometers form one cell. Handover is performed when crossing cells. As a result, handover frequency can be reduced.
- NR In NR, it is transmitted from a transmission point (for example, RRH) in order to communicate with a terminal (hereinafter also referred to as UE) included in a mobile object (HST (high speed train)) such as a train that moves at high speed It is envisaged to use beams.
- HST high speed train
- Existing systems eg, Rel. 15 support the transmission of unidirectional beams from RRHs to communicate with mobile units (see FIG. 1A).
- FIG. 1A shows a case where RRHs are installed along the moving path (or moving direction, traveling direction, or running path) of the moving body, and beams are formed from each RRH in the moving direction side of the moving body.
- An RRH that forms a beam in one direction may be called a uni-directional RRH.
- the mobile receives a negative Doppler shift (-f D ) from each RRH.
- the beam is not limited to this, and the beam may be formed in the opposite direction to the moving direction. Beams may be formed in any direction regardless of .
- multiple (eg, two or more) beams are transmitted from the RRH.
- beams are formed both in the traveling direction of the moving object and in the opposite direction (see FIG. 1B).
- FIG. 1B shows a case where RRHs are installed along the movement path of the moving object, and beams are formed from each RRH in both the traveling direction side and the opposite direction side of the traveling direction of the moving object.
- An RRH that forms beams in multiple directions may be called a bidirectional RRH (bi-directional RRH).
- the UE communicates in the same way as in single TRP.
- multiple TRPs (with the same cell ID) can be transmitted.
- the mobile will have high power from a negative Doppler shifted signal halfway between the two RRHs. switch to a signal that has undergone a positive Doppler shift.
- the maximum change width of the Doppler shift that requires correction is the change from -f D to +f D , which is double that of the unidirectional RRH.
- the positive Doppler shift may be read as information on the positive Doppler shift, positive (positive) direction Doppler shift, and positive (positive) direction Doppler information.
- the negative Doppler shift may be read as information about the negative Doppler shift, negative Doppler shift, or negative Doppler information.
- the tracking reference signal (TRS), DMRS and PDSCH are commonly transmitted (using the same time and same frequency resources) on two TRPs (RRH) (regular SFN, transparent transparent SFN, HST-SFN).
- the PDSCH has one TCI state because the UE receives the DL channel/signal for a single TRP.
- RRC parameters are defined to distinguish between transmissions utilizing a single TRP and transmissions utilizing an SFN.
- the UE may distinguish between reception of DL channels/signals for single TRP and reception of PDSCH assuming SFN based on this RRC parameter when reporting the corresponding UE capability information.
- the UE may transmit and receive using SFN assuming a single TRP.
- TRSs are transmitted TRP-specifically (using different time/frequency resources depending on the TRP).
- TRS1 is transmitted from TRP#1
- TRS2 is transmitted from TRP#2.
- TRS and DMRS are transmitted TRP-specifically.
- TRS1 and DMRS1 are transmitted from TRP#1
- TRS2 and DMRS2 are transmitted from TRP#2.
- Schemes 1 and 2 suppress abrupt changes in Doppler shift compared to scheme 0, and can properly estimate/compensate for the Doppler shift.
- the maximum throughput of scheme 2 is lower than that of scheme 1 because the DMRS of scheme 2 is increased more than the DMRS of scheme 1 .
- the UE switches between single TRP and SFN based on higher layer signaling (RRC information element/MAC CE).
- the UE may switch scheme 1/scheme 2/NW pre-compensation scheme based on higher layer signaling (RRC information element/MAC CE).
- RRC information element/MAC CE higher layer signaling
- the TRPs (TRP#0, #2, . ).
- the TRPs (TRP#1, #3, . . . ) that transmit DL signals in the traveling direction of the HST transmit the second TRS (TRS arriving after the HST) on the same time and frequency resource (SFN).
- the first TRS and the second TRS may be transmitted/received using different frequency resources.
- TRS1-1 to 1-4 are transmitted as the first TRS, and TRS2-1 to 2-4 are transmitted as the second TRS.
- 64 beams and 64 time resources are used to transmit the first TRS, and 64 beams and 64 time resources are used to transmit the second TRS.
- the beams of the first TRS and the beams of the second TRS are considered equal (equal QCL type DRS). Resource utilization efficiency can be improved by multiplexing the first TRS and the second TRS on the same time resource and different frequency resources.
- RRHs #0-#7 are arranged along the movement route of the HST.
- RRH#0-#3 and RRH#4-#7 are connected to baseband units (BBU) #0 and #1, respectively.
- BBU baseband units
- Each RRH is a bidirectional RRH, and forms beams in both the travel direction and the reverse direction of the movement path using each transmission/reception point (TRP).
- the base station uses a Doppler pre-compensation (correction) scheme (Pre-Doppler Compensation scheme, Doppler pre-Compensation scheme, Network (NW) pre-compensation scheme (NW pre-compensation scheme, HST NW pre-compensation scheme), TRP pre-compensation scheme, TRP-based pre-compensation scheme) are being considered.
- Doppler precompensation scheme may be a combination of Scheme 1 and precompensation for Doppler shift by the base station.
- the TRP that forms the beam on the traveling direction side of the movement path and the TRP that forms the beam on the opposite direction side of the movement path, after performing Doppler correction, to the UE in the HST Perform transmission of DL signals/channels.
- TRP#2n-1 provides positive Doppler correction
- TRP#2n provides negative Doppler correction to reduce the effects of Doppler shifts in the UE's signal/channel reception (Fig. 4C).
- the TCI field (TCI state field) is being considered to dynamically switch between single TRP and SFN.
- TCI state field For example, using RRC information element / MAC CE (for example, Enhanced TCI States Activation / Deactivation for UE-specific PDSCH MAC CE) / DCI (TCI field), each TCI code point (TCI field code point, DCI code point) , one or two TCI states are set/indicated.
- a UE may decide to receive a single TRP PDSCH when configured/indicated to one TCI state.
- the UE may decide to receive the SFN PDSCH with multi-TRP when configured/indicated with two TCI states.
- NZP-CSI-RS-ResourceSet For a CSI-RS associated with a non-zero power (NZP) CSI-RS resource set (higher layer parameter "NZP-CSI-RS-ResourceSet") for which the upper layer parameter "repetition" is set to "on”, the UE: It is not assumed that CSI-RS is configured in symbols while the UE is configured to monitor CORESET. - For any other NZP CSI-RS resource set (“NZP-CSI-RS-ResourceSet”) configuration, when CORESET (and associated search space (SS) set) and CSI-RS are configured in the same symbol.
- NZP-CSI-RS-ResourceSet any other NZP CSI-RS resource set
- UE if "type D (typeD)" is applicable, the PDCCH DMRS transmitted in the CORESET (all search space (SS) sets related to), and the CSI-RS is a QCL relation of type D (quasi co-located with type D).
- CSI-RS eg, aperiodic (A-)
- Rel Rel
- the inventors came up with a method for appropriately determining the QCL of a specific reference signal (eg, CSI-RS).
- a specific reference signal eg, CSI-RS
- 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 TRP, single TRP system, single TRP transmission, and single PDSCH may be read interchangeably.
- multi-TRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be read interchangeably.
- 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 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 shall not be set
- neither CORESET Pool Index (CORESETPoolIndex) value of 1 shall be set for any CORESET
- neither codepoint of the TCI field shall be mapped 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.
- CSI-RS, NZP-CSI-RS, periodic (P)-CSI-RS, P-TRS, semi-persistent (SP)-CSI-RS, aperiodic (A)-CSI-RS, TRS, tracking CSI-RS for use, CSI-RS with TRS information (higher layer parameter trs-Info), NZP CSI-RS resources in the NZP CSI-RS resource set with TRS information, multiple NZP-CSI-RS on the same antenna port NZP-CSI-RS resources and TRS resources in the NZP-CSI-RS resource set consisting of resources may be read interchangeably.
- CSI-RS resource, CSI-RS resource set, CSI-RS resource group, and information element (IE) may be read interchangeably.
- the code point of the DCI field 'Transmission Configuration Indication', the TCI code point, the DCI code point, and the code point of the TCI field may be read interchangeably.
- single TRP and SFN may be read interchangeably.
- HST, HST scheme, high-speed movement scheme, scheme 1, scheme 2, NW pre-compensation scheme, HST scheme 1, HST scheme 2, HST NW pre-compensation scheme may be read interchangeably.
- PDSCH/PDCCH using single TRP may be read as PDSCH/PDCCH based on single TRP and single TRP PDSCH/PDCCH.
- PDSCH/PDCCH using SFN may be read as PDSCH/PDCCH using SFN in multi, PDSCH/PDCCH based on SFN, and SFN PDSCH/PDCCH.
- receiving DL signals (PDSCH/PDCCH) using SFN may be performed using the same time/frequency resources and/or transmitting the same data (PDSCH)/control information (PDCCH) to multiple It may mean receiving from a send/receive point.
- receiving a DL signal using an SFN may utilize multiple TCI states/spatial domain filters/beams/QCLs using the same time/frequency resources and/or the same data/control information. may mean to receive
- the HST-SFN scheme, Rel. 17 and later SFN schemes, new SFN schemes, new HST-SFN schemes, Rel. 17 and later HST-SFN scenarios, HST-SFN schemes for HST-SFN scenarios, SFN schemes for HST-SFN scenarios, scheme 1, Doppler precompensation scheme, scheme 1 (HST scheme 1) and Doppler precompensation scheme may be read interchangeably.
- Doppler pre-compensation scheme base station pre-compensation scheme, TRP pre-compensation scheme, pre-Doppler compensation scheme, Doppler pre-compensation scheme, NW pre-compensation scheme, HST NW pre-compensation scheme, TRP pre-compensation scheme , TRP-based pre-compensation scheme, may be read interchangeably.
- precompensation scheme, reduction scheme, improvement scheme, and correction scheme may be read interchangeably.
- PDCCH/search space (SS)/CORESET with linkage, linked PDCCH/SS/CORESET, and PDCCH/SS/CORESET pair may be read interchangeably.
- two linked CORESETs for PDCCH repetition and two CORESETs respectively associated with two linked SS sets may be read interchangeably.
- SFN-PDCCH repetitions PDCCH repetitions, two linked PDCCHs, and one DCI being received across the two linked search spaces (SS)/CORESET are interchangeable. good.
- PDCCH repetition SFN-PDCCH repetition
- PDCCH repetition for higher reliability PDCCH/CORESET for reliability
- two linked PDCCHs may be read interchangeably.
- the PDCCH reception method, PDCCH repetition, SFN-PDCCH repetition, HST-SFN, and HST-SFN scheme may be read interchangeably.
- the PDSCH reception method, single DCI-based multi-TRP, and HST-SFN scheme 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
- received DL channel/signal, DL channel/signal, DL reception, received signal, received channel, etc. may be read interchangeably.
- UL channels/signals, transmission of UL channels/signals, and UL transmissions may be read interchangeably.
- signals and channels may be read interchangeably.
- the first TCI state may mean at least one of the first TCI state and a TCI state with a small (or large) TCI state ID.
- the second TCI state may mean at least one of a second TCI state and a TCI state with a larger (or smaller) TCI state ID.
- the first TCI state and the second TCI state may be read interchangeably.
- repetition, repeated transmission, and repeated reception may be read interchangeably.
- multiple channels/signals/resources "overlapping in the time domain” means that multiple channels/signals/resources are “configured on the same symbol.” "transmitted/received in symbols” may be read interchangeably.
- the time domain may be interchanged with particular time periods, symbols, slots, sub-slots.
- the CSI-RS resource associated with the NZP CSI-RS resource set configuration (“NZP-CSI-RS-ResourceSet") where the repetition setting (higher layer parameter "repetition") is not set to "on” RS, CSI-RS whose repetition setting is not set to 'on', CSI-RS other than the CSI-RS of the CSI-RS resources related to the setting of the NZP CSI-RS resource set whose repetition setting is not set to 'on', repetition CSI-RSs other than the CSI-RS whose setting is set to "on” may be read interchangeably.
- TCI state may be read as common TCI state, unified TCI state, joint TCI state, separate TCI state, separate DL TCI state, and separate UL TCI state.
- a joint TCI state may refer to a TCI state common to the UL and DL. In other words, each embodiment of the present disclosure can be appropriately applied even in the common TCI state framework.
- CSI-RS is described as a main example as a specific reference signal, but the specific reference signal is not limited to CSI-RS.
- the UE determines that the DMRS for PDCCH of a specific CORESET among the CORESETs and the CSI-RS have a QCL type D relationship. You can decide to become
- the PDCCH may be repeated transmission of the PDCCH.
- the PDCCH may be repeated transmission of PDCCH using multi-TRP.
- the UE can determine the TCI state associated with a specific CORESET (DMRS for PDCCH) among the CORESETs. is the TCI state that applies to the CSI-RS.
- the specific CORESET may be, for example, a CORESET having a lower (or higher) CORESET ID among CORESETs related to PDCCH repetition.
- the specific CORESET may be, for example, the CORESET associated with the TCI state of the lower (or higher) TCI state ID among the CORESETs related to PDCCH repetition.
- the specific CORESET may be, for example, a CORESET corresponding to a lower (or higher) CORESET pool index among CORESETs related to PDCCH repetition.
- the particular CORESET corresponds to, for example, the earlier (or later/latest) assigned (transmitted) CORESET (or the starting symbol of the CORESET) among the CORESETs related to the PDCCH repetition. It may be a CORESET that
- the CSI-RS is a CSI-RS resource related to the NZP CSI-RS resource set setting ("NZP-CSI-RS-ResourceSet”) in which the repetition setting (higher layer parameter "repetition”) is not set to "on”. It may be CSI-RS.
- the CORESET for PDCCH repetition may be multiple CORESETs associated with different QCL type D (TCI states).
- the multiple CORESETs may be CORESETs associated with linked PDCCHs.
- the CORESET/PDCCH link may be configured based on certain higher layer parameters.
- FIG. 5A is a diagram showing an example of TCI states of CSI-RSs according to the first embodiment.
- the symbol in which CSI-RS is transmitted overlaps with the symbols of two CORESETs (CORESET#1 and CORESET#2).
- CORESET#1 and CORESET#2 correspond to TCI state #1 and TCI state #2, respectively.
- CORESET#1 and CORESET#2 are associated with two linked PDCCHs.
- CORESET#1 and CORESET#2 do not overlap in the time domain.
- the UE determines that the CSI-RS TCI state is the TCI state associated with the lower CORESET ID/TCI state ID CORESET#1.
- FIG. 5B is a diagram showing another example of the TCI state of CSI-RSs according to the first embodiment.
- the symbol in which CSI-RS is transmitted overlaps with the symbols of two CORESETs (CORESET#1 and CORESET#2).
- CORESET#1 and CORESET#2 correspond to TCI state #1 and TCI state #2, respectively.
- CORESET#1 and CORESET#2 are associated with two linked PDCCHs.
- CORESET#1 and CORESET#2 overlap in the time domain.
- the UE determines that the CSI-RS TCI state is the TCI state associated with the lower CORESET ID/TCI state ID CORESET#1.
- the CORESET of this embodiment does not have to be the CORESET associated with two linked PDCCHs. Also, in FIGS. 5A and 5B, the lengths of the multiple CORESETs may be the same or different.
- the CORESET in this embodiment may be the CORESET associated with the SFN PDCCH.
- the UE When the CORESET for repetition of the SFN PDCCH and the CSI-RS overlap in the time domain, the UE identifies a specific TCI state/QCL in the CORESET as the TCI state/QCL applied to the CSI-RS. You can judge.
- TCI states may be associated with the CORESET associated with the SFN PDCCH.
- the particular TCI state may be, for example, the TCI state of the lower (or higher) TCI state ID among the TCIs of the CORESET associated with the SFN PDCCH.
- the CSI-RS is a CSI-RS resource related to the NZP CSI-RS resource set setting ("NZP-CSI-RS-ResourceSet”) in which the repetition setting (higher layer parameter "repetition”) is not set to "on”. It may be CSI-RS.
- FIG. 6 is a diagram showing an example of the TCI state of CSI-RSs according to the modification of the first embodiment.
- the symbol for transmitting CSI-RS and the symbol for CORESET#1 overlap.
- CORESET#1 corresponds to TCI state #1 and TCI state #2.
- the UE determines the TCI state of CSI-RS to be TCI state #1 with a lower TCI state ID.
- the TCI state/QCL of CSI-RS is determined appropriately. be able to.
- CSI-RS and any other DL signal may be configured to overlap in the time domain.
- other DL signals are Rel. 17 or later may be a DL signal.
- the CSI-RS may be, for example, A-CSI-RS.
- the time from the reception of the DCI that triggers the CSI-RS (triggering DCI) to the reception of the CSI-RS may be less than a threshold (eg, "beamSwitchTiming").
- the other DL signal may be, for example, at least one of CORESET/PDCCH, PDSCH, P-/SP-/A-CSI-RS.
- the PDSCH may be a PDSCH scheduled with an offset greater than or equal to a threshold (eg, "timeDurationForQCL").
- a threshold eg, "timeDurationForQCL”
- CSI-RS included in the other DL signal is when one value out of multiple values is reported and a parameter for enabling beam switching timing (eg, "enableBeamSwitchTiming") is not provided, Or, if a NZP CSI-RS resource set ("NZP-CSI-RS-ResourceSet”) with a TRS information parameter (eg, "trs-Info") is configured, a threshold (eg, "beamSwitchTiming”) or more It may be the P-/SP-/A-CSI-RS in the NZP CSI-RS resource set ("NZP-CSI-RS-ResourceSet”) scheduled at the offset.
- the CSI-RS included in the other DL signal is A-CSI- It may be RS.
- CSI-RS included in the other DL signal is provided with a parameter (e.g., "enableBeamSwitchTiming") for the UE to provide a threshold (e.g., "beamSwitchTiming-r16") and to enable beam switching timing, NZP CSI-RS resource sets ("NZP-CSI -RS-ResourceSet”).
- the CSI-RS included in the other DL signal is provided with a parameter that enables beam switching timing (eg, "enableBeamSwitchTiming"), and the threshold reported by the UE (eg, "beamSwitchTiming-r16") or more It may be the A-CSI-RS in the NZP CSI-RS resource set ("NZP-CSI-RS-ResourceSet”) with the repetition setting ("repetition”) set to "on", scheduled at the offset.
- NZP-CSI-RS-ResourceSet NZP-CSI-RS resource set
- repetition setting repetition setting
- the specific PDCCH/CORESET included in other DL signals may be the SFN PDCCH/CORESET.
- the SFN PDCCH/CORESET may be the SFN PDCCH/CORESET for HST or the PDCCH/CORESET for reliability.
- the PDCCH/CORESET may have multiple (eg, two) active TCI states.
- a particular TCI state may be determined to be the QCL assumption for that CSI-RS (eg, A-CSI-RS).
- the specific TCI state may be the first TCI state corresponding to CORESET.
- DL signals and CSI-RS may not overlap in the time domain.
- the UE when receiving the CSI-RS, sets the QCL/TCI state of a specific CORESET. , may be applied to the reception of the CSI-RS.
- CSI-RS eg, A-CSI-RS
- the particular CORESET has the lowest (or highest) CORESET ID associated with the monitored search space in the latest slot in which one or more CORESETs in the active BWP in the serving cell are being monitored It may be a CORESET.
- the UE determines to apply the first TCI state among the multiple TCI states to receive CSI-RS. You may
- a specific PDCCH/CORESET included in other DL signals may be a repeatedly transmitted PDCCH and/or a CORESET associated with a repetition of the PDCCH.
- the PDCCH/CORESET may be PDCCH/CORESET for reliability.
- At least one of the PDCCH/CORESET and the SS (set) associated with the PDCCH/CORESET may be (two) linked PDCCH/CORESET/SS (sets).
- the UE may determine/derive the QCL assumption for that CSI-RS based on a particular CORESET. .
- the particular CORESET is, for example, the lowest (or highest) CORESET ID associated with the monitored search space in the latest slot in which one or more CORESETs in the active BWP in the serving cell are monitored may be a CORESET having The UE applies the TCI state/QCL corresponding to that particular CORESET for the reception of CSI-RS.
- FIG. 7 is a diagram showing an example of default QCL determination according to Embodiment 2-2-1.
- multiple CORESETs CORESET #1 and #2 are monitored in the most recent slot.
- CORESET#1 corresponds to TCI state #1
- CORESET#2 corresponds to TCI state #2.
- the UE determines the A-CSI-RS default beam (QCL).
- the UE applies the TCI state (TCI state #1) corresponding to CORESET#1 with the lowest CORESET ID in the latest slot to reception of A-CSI-RS (i.e., A-CSI- determined/derived as default QCL for RS).
- TCI state #1 corresponding to CORESET#1 with the lowest CORESET ID in the latest slot to reception of A-CSI-RS (i.e., A-CSI- determined/derived as default QCL for RS).
- DL signals may be present in the symbols of CSI-RS (eg, A-CSI-RS).
- the other DL signal may be one CORESET.
- the UE may determine/derive the QCL assumption of the CSI-RS based on a specific CORESET.
- the particular CORESET is, for example, the lowest (or highest) CORESET ID associated with the monitored search space in the latest slot in which one or more CORESETs in the active BWP in the serving cell are monitored may be a CORESET having In this case, the particular CORESET may mean a CORESET that overlaps with CSI-RS in the time domain.
- the UE may apply the TCI state/QCL corresponding to that particular CORESET for CSI-RS reception.
- FIG. 8 is a diagram showing an example of default QCL determination according to Embodiment 2-2-2.
- A-CSI-RS and CORESET#1 overlap in the time domain.
- the UE sets the TCI state (TCI State #1) is applied to the reception of A-CSI-RS (ie determined/derived as default QCL for A-CSI-RS).
- the plurality of other DL signals may be a plurality of CORESETs.
- the UE may determine/derive the QCL assumption of the CSI-RS based on a specific CORESET among multiple CORESETs.
- the UE may determine/derive the QCL assumption of the CSI-RS based on specific symbols of overlapping CSI-RS resources (Embodiment 2-2-3-A).
- the UE may determine/derive the TCI state/QCL to apply to the CSI-RS based on the first/latest symbol of the CSI-RS resource that overlaps with other DL signals. For example, the UE may determine that the TCI state of the overlapping CORESET in the first/latest symbol of the CSI-RS resource that overlaps with other DL signals is the TCI state/QCL that applies to the CSI-RS.
- the UE may determine/derive the QCL assumption of the CSI-RS based on the CORESET ID of the CORESET that overlaps with the CSI-RS (Embodiment 2-2-3-B).
- the UE determines that the TCI state corresponding to the CORESET having the lowest (or highest) CORESET ID among multiple CORESETs that overlap with CSI-RS is the TCI state/QCL that applies to CSI-RS. You may
- the UE may determine/derive the QCL assumption of the CSI-RS based on the TCI state ID of the TCI state corresponding to the CORESET that overlaps with the CSI-RS (Embodiment 2-2-3-C).
- the UE determines that the TCI state of the lowest (or highest) TCI state ID among the TCI states corresponding to multiple CORESETs that overlap with CSI-RS is the TCI state/QCL that applies to CSI-RS. You can judge.
- the UE may determine/derive the QCL assumption of the CSI-RS based on other DL signals overlapping with the CSI-RS (Embodiment 2-2-3-D). Different TCI states/QCLs may be applied to one CSI-RS resource.
- the TCI state/ A QCL may be determined/derived.
- the TCI state / QCL to apply to the reception of CSI-RS in the non-overlapping CSI-RS resources May be determined/derived.
- FIG. 9 is a diagram showing an example of default QCL determination according to Embodiment 2-2-3.
- A-CSI-RS and CORESET#1 and CORESET#2 overlap in the time domain.
- the UE may apply the TCI state (TCI state #1) of the CORESET (CORESET#1) that first overlaps with A-CSI-RS in the time domain for reception of A-CSI-RS. (The above embodiment 2-2-3-A is applied).
- the UE sets the TCI state (TCI state #1) of the CORESET (CORESET#1) having the lowest CORESET ID among the CORESETs overlapping with A-CSI-RS to receive A-CSI-RS. It may be applied (apply the above embodiment 2-2-3-B).
- the UE applies the TCI state (TCI state #1) with the lowest TCI state ID among the TCI states corresponding to the CORESETs overlapping with A-CSI-RS to receive A-CSI-RS. (Applying Embodiment 2-2-3-C above).
- the UE may determine/derive the TCI state to apply to the reception of A-CSI-RS based on the CORESET that overlaps with A-CSI-RS (Embodiment 2-2-3- D). For example, in A-CSI-RS resources (symbols) that overlap with CORESET#1, the UE may apply TCI state #1 corresponding to CORESET#1 for reception of A-CSI-RS. Also, for example, the UE may apply TCI state #2 corresponding to CORESET#2 to reception of A-CSI-RS in A-CSI-RS resources (symbols) overlapping CORESET#2. .
- the UE may specify a specific CORESET (e.g., the lowest (highest) CORESET ID and the lowest (highest) TCI state ID). CORESET and/or CORESET) may be applied to the reception of A-CSI-RS.
- CSI-RS and other DL signals may overlap in the time domain in some or all resources.
- FIG. 10A is a diagram showing an example of overlap between A-CSI-RS and other DL signals.
- all resources of other DL signals are overlapped in all resources of A-CSI-RS.
- FIG. 10B is a diagram showing another example of overlap between A-CSI-RS and other DL signals.
- the A-CSI-RS and other DL signals overlap in part of the A-CSI-RS resource.
- FIG. 10C is a diagram showing another example of overlap between A-CSI-RS and other DL signals.
- A-CSI-RS and other DL signals overlap in part of the resources of other DL signals.
- a configuration in which the start symbol/last symbol of the A-CSI-RS and other DL signals match may be allowed.
- the UE may assume that the starting/last symbols of the A-CSI-RS and other DL signals match.
- RRC IEs Higher layer parameters/UE capabilities corresponding to features in at least one of the above embodiments may be defined.
- UE capabilities may indicate support for this feature.
- a UE for which a higher layer parameter corresponding to that function (enabling that function) is set may perform that function. It may be defined that "UEs for which upper layer parameters corresponding to the function are not set shall not perform the function (for example, according to Rel. 15/16)".
- a UE reporting UE capabilities indicating that it supports that function may perform that function. It may be specified that "a UE that does not report UE capabilities indicating that it supports the feature shall not perform that feature (eg according to Rel. 15/16)".
- a UE may perform a function if it reports a UE capability indicating that it supports the function, and the higher layer parameters corresponding to the function are configured. "If the UE does not report a UE capability indicating that it supports the function, or if the upper layer parameters corresponding to the function are not set, the UE does not perform the function (e.g., according to Rel. 15/16 ) may be defined.
- the UE capability may indicate whether the UE supports this function.
- the function may be the application of default beams (TCI states/spatial relations/PL-RS/QCL).
- a UE capability may be defined by whether or not it supports at least one of the QCL determination methods described in the first embodiment.
- UE capabilities may be defined in supporting default beam (TCI state/spatial relationship/PL-RS/QCL) operation.
- UE capabilities may be defined in supporting default beam (TCI state/spatial relationship/PL-RS/QCL) operation for CSI-RS.
- a UE capability may be defined with or without supporting CORESET with multiple (two) active TCI states.
- the UE can implement the above functions while maintaining compatibility with existing specifications.
- wireless communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
- communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.
- FIG. 11 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 to detect the PDCCH.
- 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. 12 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- the base station 10 comprises a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 .
- One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140 may be provided.
- this example mainly shows the functional blocks that characterize the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 110 controls the base station 10 as a whole.
- the control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like.
- the control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission line interface 140 .
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 .
- the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
- the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
- the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
- the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.
- the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
- the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measurement section 123 .
- the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
- the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control for example, HARQ retransmission control
- the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.
- channel coding which may include error correction coding
- modulation modulation
- mapping mapping
- filtering filtering
- DFT discrete Fourier transform
- DFT discrete Fourier transform
- the transmitting/receiving unit 120 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .
- the transmitting/receiving unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
- the transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.
- FFT Fast Fourier transform
- IDFT Inverse Discrete Fourier transform
- the transmitting/receiving unit 120 may measure the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
- the measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured.
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- RSSI Received Signal Strength Indicator
- channel information for example, CSI
- the transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.
- the transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission line interface 140.
- the control unit 110 controls the one or more control resource sets. Based on the Transmission Configuration Indication (TCI) state associated with a particular control resource set, the Quasi-Co-Location (QCL) assumption to apply to the CSI-RS may be determined. good.
- the transmitting/receiving unit 120 may transmit the CSI-RS to which the QCL assumption is applied (first and second embodiments).
- FIG. 13 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
- the user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 .
- One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
- this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 210 controls the user terminal 20 as a whole.
- the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission/reception, measurement, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 .
- the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission/reception unit 220 .
- the transmitting/receiving section 220 may include a baseband section 221 , an RF section 222 and a measurement section 223 .
- the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212 .
- the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure.
- the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of a transmission processing section 2211 and an RF section 222 .
- the receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .
- the transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
- the transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- RLC layer processing for example, RLC retransmission control
- MAC layer processing for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control
- the transmitting/receiving unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
- Whether or not to apply DFT processing may be based on 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 control unit 210 when one or more control resource sets and channel state information reference signals (CSI-RS) are configured to at least partially overlap in the time domain, the one or more control resource sets Based on the Transmission Configuration Indication (TCI) state associated with a specific control resource set, even if the Quasi-Co-Location (QCL) assumption to apply to the CSI-RS is determined good.
- the transceiver 220 may receive the CSI-RS to which the QCL assumption is applied (first and second embodiments).
- the control unit 210 determines the TCI state corresponding to the control resource set with the lowest control resource set ID among the plurality of control resource sets.
- the TCI state with the lowest TCI state ID may be determined to be the QCL assumption applied to the CSI-RS (first and second embodiments).
- the control unit 210 selects one of the plurality of TCI states.
- the control unit 210 selects the control resource set monitored in the latest slot within the bandwidth portion in which the CSI-RS is configured.
- a corresponding TCI state may be determined to be the QCL assumption that applies to the CSI-RS (second embodiment).
- each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
- a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 14 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to an embodiment.
- the base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
- processor 1001 may be implemented by one or more chips.
- predetermined software program
- the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .
- the processor 1001 operates an operating system and controls the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
- CPU central processing unit
- control unit 110 210
- transmission/reception unit 120 220
- FIG. 10 FIG. 10
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
- the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
- the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.
- a computer-readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include
- the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- a signal may also be a message.
- a reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc., depending on the applicable standard.
- a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may consist of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) that make up a radio frame may be called a subframe.
- a subframe may consist of one or more slots in the time domain.
- a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
- a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
- Numerology for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may also be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
- one subframe may be called a TTI
- a plurality of consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
- a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
- the short TTI e.g., shortened TTI, etc.
- a TTI having the above TTI length may be read instead.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
- the number of subcarriers included in an RB may be determined based on neumerology.
- an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long.
- One TTI, one subframe, etc. may each be configured with one or more resource blocks.
- One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.
- PRB Physical Resource Block
- SCG Sub-Carrier Group
- REG Resource Element Group
- PRB pair RB Also called a pair.
- a resource block may be composed of one or more resource elements (Resource Element (RE)).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP for UL
- BWP for DL DL BWP
- One or multiple BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given 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. 15 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 millimeter wave radar, Light Detection and Ranging (LiDAR), camera, positioning locator (eg, Global Navigation Satellite System (GNSS), etc.), map information (eg, 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, “determining (determining)” 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.”
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
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。
PUSCH、PUCCH、SRSのそれぞれの送信電力制御におけるパスロスPLb,f,c(qd)[dB]は、サービングセルcのキャリアfのアクティブUL BWP bに関連付けられる下りBWP用の参照信号(RS、パスロス参照RS(PathlossReferenceRS))のインデックスqdを用いてUEによって計算される。本開示において、パスロス参照RS、pathloss(PL)-RS、インデックスqd、パスロス計算に用いられるRS、パスロス計算に用いられるRSリソース、は互いに読み替えられてもよい。本開示において、計算、推定、測定、追跡(track)、は互いに読み替えられてもよい。
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。
非single frequency network(SFN)に基づくマルチTRP PDCCHの信頼性のために、以下の検討1から3が検討されている。
[検討1]符号化/レートマッチングが1つの繰り返し(repetition)に基づき、他の繰り返しにおいて同じ符号化ビットが繰り返される。
[検討2]各繰り返しは、同じcontrol channel element(CCE)数と、同じ符号化ビットと、を有し、同じDCIペイロードに対応する。
[検討3]2つ以上のPDCCH候補が明示的に互いにリンクされる。UEが復号前にそのリンクを知る。
(与えられたサーチスペース(SS)セット内の)PDCCH候補の2つのセットがCORESETの2つのTCI状態にそれぞれ関連付けられる。ここでは、同じCORESET、同じSSセット、異なるモニタリングオケージョンにおけるPDCCH繰り返し、が用いられる。
PDCCH候補の2つのセットが2つのSSセットにそれぞれ関連付けられる。両方のSSセットはCORESETに関連付けられ、各SSセットはそのCORESETの1つのみのTCI状態に関連付けられる。ここでは、同じCORESET、2つのSSセット、が用いられる。
1つのSSセットが2つの異なるCORESETに関連付けられる。
2つのSSセットが2つのCORESETにそれぞれ関連付けられる。
Rel.15で規定されるPDCCH/CORESETについて、CORESETプールインデックス(CORESETPoolIndex)(TRP情報(TRP Info)と呼ばれてもよい)なしの1つのTCI状態が、1つのCORESETに設定される。
LTEにおいて、HST(high speed train)のトンネルにおける配置が難しい。ラージアンテナはトンネル外/内への送信を行う。例えば、ラージアンテナの送信電力は1から5W程度である。ハンドオーバのために、UEがトンネルに入る前にトンネル外に送信することが重要である。例えば、スモールアンテナの送信電力は250mW程度である。同じセルIDを有し300mの距離を有する複数のスモールアンテナ(送受信ポイント)はsingle frequency network(SFN)を形成する。SFN内の全てのスモールアンテナは、同じPRB上の同じ時間において同じ信号を送信する。端末は1つの基地局に対して送受信すると想定する。実際は複数の送受信ポイントが同一のDL信号を送信する。高速移動時には、数kmの単位の送受信ポイントが1つのセルを形成する。セルを跨ぐ場合にハンドオーバが行われる。これによって、ハンドオーバ頻度を低減することができる。
Rel.17以降において、PDCCHの繰り返しについて、異なるQCLタイプDの複数のCORESETが、繰り返し設定(上位レイヤパラメータ「repetition」)が「オン」にセットされないCSI-RSと重複するときの、当該CSI-RSのQCLタイプDのQCL想定について検討されている。
・上位レイヤパラメータ「repetition」が「オン」にセットされるノンゼロパワー(NZP)CSI-RSリソースセット(上位レイヤパラメータ「NZP-CSI-RS-ResourceSet」)に関連するCSI-RSについて、UEは、UEがCORESETをモニタするよう設定されている間のシンボルにおいて、CSI-RSが設定されることを想定しない。
・それ以外のNZP CSI-RSリソースセット(「NZP-CSI-RS-ResourceSet」)の設定については、同じシンボルにおいてCORESET(に関連するサーチスペース(SS)セット)とCSI-RSが設定されるとき、UEは、もし「タイプD(typeD)」が利用可能(applicable)であれば、当該CORESET(に関連する全てのサーチスペース(SS)セット)で送信されるPDCCH用DMRSと、当該CSI-RSとがタイプDのQCL関係であること(quasi co-located with typeD)を想定する。
以下本開示の各実施形態において、他のDL信号、任意の他のDL信号、CSI-RS以外の他のDL信号、CORESET/PDCCH、とは互いに読み替えられてもよい。言い換えれば、本開示の各実施形態において、主にCSI-RSとCORESET/PDCCHとの重複に関して説明するが、CSI-RSと重複するDL信号はCORESET/PDCCHに限られない。
PDCCHに関連する1つ以上のCORESETと、CSI-RSとが時間ドメインにおいて重複するとき、UEは、当該CORESETのうちの特定のCORESETのPDCCH用DMRSと、CSI-RSがQCLタイプDの関係となることを判断してもよい。
本実施形態のCORESETは、SFN PDCCHに関連するCORESETであってもよい。
第2の実施形態では、CSI-RSと、任意の他のDL信号(例えば、特定のPDCCH/CORESET)が時間ドメインで重複して設定されてもよい。
他のDL信号に含まれる特定のPDCCH/CORESETは、SFN PDCCH/CORESETであってもよい。SFN PDCCH/CORESETは、HSTのためのSFN PDCCH/CORESETであってもよいし、信頼性のためのPDCCH/CORESETであってもよい。
他のDL信号に含まれる特定のPDCCH/CORESETは、繰り返し送信されるPDCCH、及びPDCCHの繰り返しに関連するCORESET、の少なくとも一方であってもよい。当該PDCCH/CORESETは、信頼性のためのPDCCH/CORESETであってもよい。
CSI-RS(例えば、A-CSI-RS)のシンボルにおいて、他のDL信号が存在しないとき、UEは、特定のCORESETに基づいて、当該CSI-RSのQCL想定を決定/導出してもよい。
CSI-RS(例えば、A-CSI-RS)のシンボルにおいて、他のDL信号が存在してもよい。
CSI-RS(例えば、A-CSI-RS)のシンボルにおいて、複数の他のDL信号が存在してもよい。
本開示の各実施形態において、CSI-RSと他のDL信号とは、一部又は全部のリソースにおいて時間ドメインで重複してもよい。
以上の複数の実施形態の少なくとも1つにおける機能(特徴、feature)に対応する上位レイヤパラメータ(RRC IE)/UE能力(capability)が規定されてもよい。UE能力は、この機能をサポートすることを示してもよい。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図12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13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)
- 1つ以上の制御リソースセットと、チャネル状態情報参照信号(CSI-RS)とが時間ドメインにおいて少なくとも一部が重複して設定されるとき、前記1つ以上の制御リソースセットのうち特定の制御リソースセットに関連する送信設定指示(Transmission Configuration Indication(TCI))状態に基づいて、前記CSI-RSに適用する疑似コロケーション(Quasi-Co-Location(QCL))想定を判断する制御部と、
前記QCL想定を適用した前記CSI-RSを受信する受信部と、を有する端末。 - 前記CSI-RSが複数の制御リソースセットと時間ドメインにおいて少なくとも一部重複する場合、前記制御部は、前記複数の制御リソースセットのうち、最低の制御リソースセットIDの制御リソースセットに対応するTCI状態、又は、最低のTCI状態IDのTCI状態を、前記CSI-RSに適用する前記QCL想定であると判断する、請求項1に記載の端末。
- 前記CSI-RSが1つの制御リソースセットと時間ドメインにおいて少なくとも一部重複し、かつ、前記1つの制御リソースセットに複数のTCI状態が対応する場合、前記制御部は、前記複数のTCI状態のうちの第1のTCI状態を、前記CSI-RSに適用する前記QCL想定であると判断する、請求項1に記載の端末。
- 前記CSI-RSが1つの制御リソースセットと時間ドメインにおいて少なくとも一部重複する場合、前記制御部は、前記CSI-RSが設定される帯域幅部分内における最新のスロットにおいてモニタされる制御リソースセットに対応するTCI状態を、前記CSI-RSに適用する前記QCL想定であると判断する、請求項1に記載の端末。
- 1つ以上の制御リソースセットと、チャネル状態情報参照信号(CSI-RS)とが時間ドメインにおいて少なくとも一部が重複して設定されるとき、前記1つ以上の制御リソースセットのうち特定の制御リソースセットに関連する送信設定指示(Transmission Configuration Indication(TCI))状態に基づいて、前記CSI-RSに適用する疑似コロケーション(Quasi-Co-Location(QCL))想定を判断するステップと、
前記QCL想定を適用した前記CSI-RSを受信するステップと、を有する端末の無線通信方法。 - 1つ以上の制御リソースセットと、チャネル状態情報参照信号(CSI-RS)とが時間ドメインにおいて少なくとも一部が重複して設定されるとき、前記1つ以上の制御リソースセットのうち特定の制御リソースセットに関連する送信設定指示(Transmission Configuration Indication(TCI))状態に基づいて、前記CSI-RSに適用する疑似コロケーション(Quasi-Co-Location(QCL))想定を決定する制御部と、
前記QCL想定を適用した前記CSI-RSを送信する送信部と、を有する基地局。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2021/040601 WO2023079633A1 (ja) | 2021-11-04 | 2021-11-04 | 端末、無線通信方法及び基地局 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2021/040601 WO2023079633A1 (ja) | 2021-11-04 | 2021-11-04 | 端末、無線通信方法及び基地局 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023079633A1 true WO2023079633A1 (ja) | 2023-05-11 |
Family
ID=86240806
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/040601 WO2023079633A1 (ja) | 2021-11-04 | 2021-11-04 | 端末、無線通信方法及び基地局 |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2023079633A1 (ja) |
-
2021
- 2021-11-04 WO PCT/JP2021/040601 patent/WO2023079633A1/ja active Application Filing
Non-Patent Citations (4)
Title |
---|
"Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 8", 3GPP TS 36.300 V8.12.0, April 2010 (2010-04-01) |
CATT: "Enhancements on HST-SFN deployment for Rel-17", 3GPP TSG RAN WG1 #106-E R1-2106939, 7 August 2021 (2021-08-07), XP052038112 * |
VIVO: "Further discussion on HST-SFN schemes", 3GPP TSG RAN WG1 #106B-E R1-2108955, 1 October 2021 (2021-10-01), XP052057790 * |
VIVO: "Further discussion on Multi-TRP for PDCCH, PUCCH and PUSCH enhancements", 3GPP TSG RAN WG1 #106B-E R1-2108952, 1 October 2021 (2021-10-01), XP052057787 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2023209984A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023079633A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023053398A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023063231A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023053396A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023053397A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023037521A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023037522A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023053291A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023139751A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023132073A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023132074A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023053258A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023053259A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023132071A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023132072A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023067763A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023067764A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023067766A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023067765A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023037441A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023152849A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023136055A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2024042954A1 (ja) | 端末、無線通信方法及び基地局 | |
WO2023203766A1 (ja) | 端末、無線通信方法及び基地局 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21963230 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2023557500 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2021963230 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2021963230 Country of ref document: EP Effective date: 20240604 |