WO2022153459A1 - 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Definitions
- This 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 Long Term Evolution
- 5G 5th generation mobile communication system
- 5G + plus
- NR New Radio
- 3GPP Rel.15 3GPP Rel.15 or later, etc.
- the 15/16 NR specification ensures that in cases where multiple channels / signals collide, the multiple channels / signals fall under the same pseudo-collocation (Quasi-Co-Location (QCL)) type D. , Or constraints (which may be called priority rules) are specified to avoid such cases.
- QCL pseudo-collocation
- Or constraints which may be called priority rules
- one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP (MTRP))) are applied to a user terminal (user terminal, User Equipment (UE)). It is being considered to perform DL transmission. It is also being considered that the UE performs UL transmission to one or more TRPs.
- TRP Transmission / Reception Point
- MTRP Multi-TRP
- Rel. 17 Support for simultaneous reception of multiple QCL type D channels / signals in the UE is being considered for NR.
- the control of collision of downlink control channels when the UE can receive a plurality of QCL type D channels / signals at the same time has not yet been studied. If this is not considered, the transmission and reception of the UE may be inappropriately restricted, resulting in a decrease in throughput or deterioration in communication quality.
- one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately cope with a collision of a plurality of downlink control channels.
- the terminal displays the PDCCH to be monitored among the downlink control channels (Physical Downlink Control Channel (PDCCH)) in a plurality of time-overlapping control resource sets (Control Resource Set (CORESET)). It has a control unit that determines two transmission setting instruction states (Transmission Configuration Indication state (TCI state)) based on the activated COREST, and a reception unit that monitors the determined PDCCH.
- PDCH Physical Downlink Control Channel
- CORESET Control Resource Set
- TCI state Transmission Configuration Indication state
- FIG. 1 is a diagram showing an example of a priority CORESET according to the first embodiment and another CORESET to be monitored at the same time.
- FIG. 2 is a diagram showing an example of priority CORESET in the first embodiment 1.1.2.1.
- FIG. 3 is a diagram showing an example of priority CORESET in the first embodiment 1.1.2.1.
- FIG. 4 is a diagram showing an example of priority CORESET in the first embodiment 1.1.2.1.
- FIG. 5 is a diagram showing an example of priority CORESET in the 11.2.2 embodiment.
- FIG. 6 is a diagram showing an example of the priority CORESET in the first embodiment and another CORESET to be monitored at the same time.
- FIG. 1 is a diagram showing an example of a priority CORESET according to the first embodiment and another CORESET to be monitored at the same time.
- FIG. 2 is a diagram showing an example of priority CORESET in the first embodiment 1.1.2.1.
- FIG. 3 is a diagram showing an example of priority CORESET in the first
- FIG. 7 is a diagram showing an example of the priority CORESET in the first embodiment and another CORESET to be monitored at the same time.
- FIG. 8 is a diagram showing an example of the priority CORESET in the 1.2 embodiment and another CORESET to be monitored at the same time.
- FIG. 9 is a diagram showing an example of the priority CORESET in the second embodiment and another CORESET to be monitored at the same time.
- FIG. 10 is a diagram showing an example of priority CORESET in the second embodiment 2.1.2.1.
- FIG. 11 is a diagram showing an example of priority CORESET in the 2.1.2.2 embodiment.
- FIG. 12 is a diagram showing an example of the priority CORESET in the second embodiment and another CORESET to be monitored at the same time.
- FIG. 13 is a diagram showing an example of the priority CORESET in the second embodiment and another CORESET to be monitored at the same time.
- FIG. 14 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 15 is a diagram showing an example of the configuration of the base station according to the embodiment.
- FIG. 16 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- FIG. 17 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- reception processing for example, reception, demapping, demodulation, etc.
- transmission configuration indication state TCI state
- Controlling at least one of decoding and transmission processing eg, at least one of transmission, mapping, precoding, modulation, and coding
- the TCI state may represent what applies to the downlink signal / channel.
- the equivalent of the TCI state applied to the uplink signal / channel may be expressed as a spatial relation.
- the TCI state is information related to signal / channel pseudo collocation (Quasi-Co-Location (QCL)), and may be called spatial reception parameters, spatial relation information, or the like.
- the TCI state may be set on the UE on a channel-by-channel or signal-by-signal basis.
- QCL is an index showing the statistical properties of signals / channels. For example, when one signal / channel and another signal / channel have a QCL relationship, Doppler shift, Doppler spread, and average delay are performed between these different signals / channels. ), Delay spread, and spatial parameter (for example, spatial Rx parameter) can be assumed to be the same (QCL for at least one of these). You may.
- the spatial reception parameter may correspond to the received beam of the UE (for example, the received analog beam), or the beam may be specified based on the spatial QCL.
- the QCL (or at least one element of the QCL) in the present disclosure may be read as sQCL (spatial QCL).
- QCL types A plurality of types (QCL types) may be specified for the QCL.
- QCL types AD QCL types with different parameters (or parameter sets) that can be assumed to be the same may be provided, and the parameters (which may be referred to as QCL parameters) are shown below:
- QCL Type A QCL-A
- QCL-B Doppler shift and Doppler spread
- QCL type C QCL-C
- QCL-D Spatial reception parameter.
- Control Resource Set (CORESET)
- channel or reference signal has a specific QCL (eg, QCL type D) relationship with another CORESET, channel or reference signal. It may be called a QCL assumption.
- QCL Control Resource Set
- the UE may determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of the signal / channel based on the TCI state of the signal / channel or the QCL assumption.
- the TCI state may be, for example, information about the QCL of the target channel (in other words, the reference signal (Reference Signal (RS)) for the channel) and another signal (for example, another RS). ..
- the TCI state may be set (instructed) by higher layer signaling, physical layer signaling, or a combination thereof.
- the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- MAC CE MAC Control Element
- PDU MAC Protocol Data Unit
- the broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), a minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.
- MIB Master Information Block
- SIB System Information Block
- RMSI Minimum System Information
- OSI Other System Information
- the physical layer signaling may be, for example, downlink control information (DCI).
- DCI downlink control information
- the channel / signal to which the TCI state is applied may be referred to as a target channel / reference signal (target channel / RS) or simply a target, and the other signal described above is a reference reference signal (reference RS) or source. It may be called RS (source RS), simply a reference, or the like.
- the channels for which the TCI state or spatial relationship is set are, for example, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and an uplink shared channel (Physical Downlink Control Channel (PDCCH)). It may be at least one of Physical Uplink Shared Channel (PUSCH)) and Uplink Control Channel (Physical Uplink Control Channel (PUCCH)).
- PDSCH Physical Downlink Shared Channel
- PDCH Physical Downlink Control Channel
- PUCCH Physical Uplink Control Channel
- the RS having a QCL relationship with the channel is, for example, a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a measurement reference signal (Sounding).
- SSB Synchronization Signal Block
- CSI-RS Channel State Information Reference Signal
- Sounding Sounding Reference Signal
- Reference Signal (SRS)), CSI-RS for tracking also called Tracking Reference Signal (TRS)
- TRS Tracking Reference Signal
- QRS reference signal for QCL detection
- DMRS DeModulation Reference Signal
- the SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- PBCH Physical Broadcast Channel
- the SSB may be referred to as an SS / PBCH block.
- a TCI-state QCL type X RS may mean an RS that has a QCL type X relationship with a channel / signal (DMRS), and this RS is called the TCI-state QCL type X QCL source. You may.
- DMRS channel / signal
- the UE can only receive, detect or monitor the same QCL type D channels / signals at the same time, but receive and detect multiple channels / signals of different QCL type Ds at the same time. Or could not be monitored. Therefore, in the case where a plurality of channels / signals collide (in other words, transmitted / received at overlapping times), ensure that the plurality of channels / signals correspond to the same QCL type D, or this. In order to avoid such a case, the following restrictions (which may be called priority rules, QCL application rules, etc.) are set in Rel. It is specified in the specifications of 15/16 NR.
- a plurality of channels / signals collide it is scheduled (or set) to receive (or transmit) a plurality of channels / signals of different QCL type D in the same time resource (period). It may mean that there is.
- the difference between the QCL type D (reference RS) of a certain channel / signal and the QCL type D (reference RS) of another channel / signal is that the communication of the certain channel / signal It may mean that the beam used and the beam used for communication of the other channel / signal are different.
- the difference between the QCL type D (reference RS) of a certain channel / signal and the QCL type D (reference RS) of another channel / signal is that the certain channel / signal and the other channel are different. It may be expressed that the QCL type D is different from the / signal, these QCL type D characteristics are different, the "QCL type D" is different, and so on.
- the PDCCH candidate is monitored by overlapping monitoring opportunities, the PDCCH is monitored only in a certain CORESET among the plurality of CORESETs and a CORESET having the same QCL type D characteristic as the CORESET.
- This "certain CORESET” corresponds to the smallest index CSS set in the smallest index cell, including the Common Search Space (CSS) set, if any, otherwise the smallest in the smallest index cell.
- CCS Common Search Space
- USS UE-specific Search Space
- CORESET to be monitored is determined according to the priority rule that the smaller index (that is, the smaller cell index; if the cell indexes are the same, the smaller SS set index) is preferentially monitored. ..
- the SS set index may correspond to the value set by the RRC parameter SearchSpaceId for identifying the search space.
- the CSS set index may mean the SS set index for the SS set whose search space type (RRC parameter "searchSpaceType") indicates CSS.
- the USS set index may mean an SS set index for an SS set whose search space type (RRC parameter "searchSpaceType") indicates USS.
- Multi TRP By the way, in NR, it is considered that one or more transmission / reception points (Transmission / Reception Point (TRP)) (multi-TRP (MTRP))) perform DL transmission to the UE. It is also being considered that the UE performs UL transmission to one or more TRPs.
- TRP Transmission / Reception Point
- MTRP Multi-TRP
- PDCCH repetition is applied to PDCCH (or DCI) transmitted from one or more TRPs.
- PDCCH or DCI
- PDCCH / DCI to which repeated transmission is applied may be referred to as multi-PDCCH / multi-DCI.
- the repeated transmission of PDCCH may be read as PDCCH repetition, multiple transmission of PDCCH, multiple PDCCH transmission or multiple PDCCH transmission, MTR PDCCH, and the like.
- the multi-PDCCH / multi-DCI may be transmitted from different TRPs.
- the multi-PDCCH / DCI may be multiplexed using time division multiplexing (TDM) / frequency division multiplexing (FDM) / space division multiplexing (SDM). ..
- PDCCH may be transmitted from a plurality of TRPs using different time resources.
- PDCCH When FDM PDCCH repetition is performed, PDCCH may be transmitted from a plurality of TRPs using different frequency-time resources.
- FDM PDCCH repetition two sets of resource element groups (REG), control channel element (Control Channel Element (CCE)) of PDCCH to be transmitted, two transmission PDCCH repetitions that do not overlap in frequency, and frequency
- REG resource element groups
- CCE Control Channel Element
- At least one of the non-overlapping multi-chance transmitted PDCCHs may be associated with different TCI states.
- PDCCH When SDM PDCCH repetition is performed, PDCCH may be transmitted from a plurality of TRPs using the same time / frequency resource.
- PDCCH DMRS in all REG / CCE of the PDCCH may be associated with two TCI states.
- SDM may be read as a single frequency network (SFN).
- a UE to which FDM / SDM PDCCH repetition is applied should be able to receive multiple beams (multiple QCL type D channels / signals) at the same time.
- it has not yet been examined whether or not the control of PDCCH collision when the UE can receive a plurality of beams (multiple QCL type D channels / signals) at the same time follows the above-mentioned constraint (priority rule). .. If this is not considered, the transmission and reception of the UE may be inappropriately restricted, resulting in a decrease in throughput or deterioration in communication quality.
- the present inventors have conceived a control capable of appropriately responding to a collision of a plurality of PDCCHs.
- a / B may mean "at least one of A and B”.
- activation, deactivation, instruction (or indicate), selection, setting (configure), update (update), decision (determine), etc. may be read as each other.
- RRC RRC parameter
- RRC message RRC message
- IE information element
- setting may be read as each other.
- the MAC CE, the update command, and the activation / deactivation command may be read as each other.
- support, control, controllable, actuated, actuable may be read interchangeably.
- sequences, lists, sets, groups, groups, etc. may be read as each other.
- UL Uplink
- TRP spatial relationship information
- SRI spatial relationship
- COntrol REsource SET CORESET
- PDSCH Physical Downlink Shared Channel
- code word for example, base station, predetermined antenna port (for example, demodulation reference signal (DMRS) port), predetermined antenna port group (for example, DMRS port group), predetermined group (for example, for example).
- DMRS demodulation reference signal
- CDM Code Division Multiplexing
- predetermined reference signal group predetermined reference signal group
- CORESET group predetermined resource (for example, predetermined reference signal resource), predetermined resource set (for example, predetermined reference signal resource set) , CORESET pool, PUCCH group (PUCCH resource group), spatial relationship group, downlink TCI state (DL TCI state), uplink TCI state (UL TCI state), unified TCI state (unified TCI state), etc. May be read as each other.
- the panel may be associated with at least one of the SSB / CSI-RS group group index, the group-based beam reporting group index, and the SSB / CSI-RS group group index for group-based beam reporting.
- the panel Identifier (ID) and the panel may be read as each other. That is, the TRP ID and TRP, the CORESET group ID and the CORESET group, and the like may be read as each other.
- index, ID, indicator, and resource ID may be read as each other.
- sequences, lists, sets, groups, groups, clusters, subsets, etc. may be read interchangeably.
- single PDCCH may be assumed to be supported when multi-TRP utilizes an ideal backhaul.
- Multi-PDCCH may be assumed to be supported when multi-TRPs utilize a non-ideal backhaul.
- the ideal backhaul may be called DMRS port group type 1, reference signal related group type 1, antenna port group type 1, CORESET pool type 1, and the like.
- the non-ideal backhaul may be referred to as DMRS port group type 2, reference signal related group type 2, antenna port group type 2, CORESET pool type 2, and the like. The names are not limited to these.
- multi-TRP, multi-TRP system, multi-TRP transmission, and multi-PDSCH may be read as each other.
- activating two TCI states on a single DCI (sDCI), a single PDCCH, a single DCI based multi-TRP system, an sDCI-based MTRP, and at least one TCI code point may be interchangeable. ..
- multi-DCI multi-PDCI
- multi-PDCCH multi-DCI-based multi-TRP system
- the QCL of the present disclosure may be read interchangeably with the QCL type D.
- the UE is applied when it supports simultaneous reception of two or more different QCL type D channels / signals, but it may be applied in other cases. good.
- 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 and QCL type D.
- Re and the like may be read as each other.
- the first embodiment relates to an SFN PDCCH repetition scheme.
- two or more TCI states may be activated per CORESET.
- the activation of the TCI state for CORESET may be notified to the UE using MAC CE.
- the UE determines the PDCCH (CORESET) to be monitored based on at least one priority rule shown in the 1.1-1.3 embodiment. To decide. Each will be described below.
- the monitor target CORESET determined from the priority rule is also simply referred to as “prioritized CORESET", the highest priority CORESET, and the like.
- the priority rule of the 1.1 embodiment is described in Rel. Same as 16 NR. That is, the UE monitors the CSS set preferentially over the USS set, and the SS sets of the same type (CSS or USS) have the smaller index (that is, the smaller cell index. If the cell index is the same).
- the preferred CORESET is determined according to the priority rule that the SS set index (whichever is smaller) is preferentially monitored.
- Embodiment 1.1 is further divided into the following two types: Embodiment 1.1.1: The preferred CORESET has two active TCI states (two QCL type Ds). Embodiment 1.1.2: The preferred CORESET has one active TCI state (one QCL type D).
- the UE shall perform this CORESET if the following conditions (1.1.1a) or (1.1.1b) are satisfied. May be monitored: (1.1.1a)
- the two active TCI states are of the same QCL type D as the two active TCI states of the preferred CORESET.
- One of the two active TCI states is the same QCL type D as one of the two active TCI states of the preferred CORESET.
- the UE monitors the CORESET by applying only the TCI state which is the same QCL type D as one of the two active TCI states of the priority CORESET.
- FIG. 1 is a diagram showing an example of the priority CORESET in the first embodiment and another CORESET to be monitored at the same time.
- four CORESETs (CORESET # 1- # 4) overlap in time.
- the UE first selects CORESET # 1 corresponding to the CSS set as the priority CORESET. Since CORESET # 1 has two active TCI states, it is the operation of the first embodiment 1.1.1.
- TCI state of CORESET # 2 is the same QCL type D as TCI state # 2 of priority CORESET, the UE monitors CORESET # 2.
- One of the two TCI states of CORESET # 4 is the same QCL type D as the TCI state # 1 of the preferred CORESET, but the other is a QCL type D (TCI state # 3) different from the TCI state # 2 of the preferred CORESET. .. Therefore, the UE according to the above (1.1.1a) does not monitor CORESET # 4. The UE according to the above (1.1.1b) monitors CORESET # 4 by applying only TCI state # 1.
- a priority CORESET having one active TCI state determined first according to the same priority rule as 16 NR is also called a first priority CORESET, and a priority CORESET other than the first priority CORESET determined next is referred to. , Also called the second priority CORESET.
- the second priority CORESET may be referred to as CORESET X.
- One active TCI state of the first priority CORESET may be called a first priority TCI state (1st priority TCI state). Any of the active TCI states of the second priority CORESET may be referred to as the second priority TCI state (2nd priority TCI state).
- the first embodiment is roughly classified into the first embodiment 1.1.2.1 and 1.1.2.2 according to the method for determining the second priority CORESET.
- the second priority CORESET is from the remaining colliding CORESETs excluding the first priority CORESET, Rel. It may be determined according to the same priority rule as 16. That is, the second preferred CORESET corresponds to the smallest index CSS set in the smallest index cell, if any, of the remaining conflicting CORESETs, otherwise the smallest in the smallest index cell. It may correspond to the USS set of indexes. The smallest USS set index is determined across all USS sets with at least one PDCCH candidate in overlapping PDCCH monitoring opportunities.
- CORESET corresponding to the SS set / cell of the minimum index of may be searched as a candidate for the second priority CORESET. That is, for a CORESET having only one active TCI state, the UE may continue to search for a second preferred CORESET until the active TCI state is different from the first preferred TCI state.
- the UE determines this active TCI state as the second priority TCI state, and sets this CORESET as the second priority TCI state. It may be determined as the priority CORESET of 2.
- the candidate for the second priority COSET derived according to the above priority rule has only one active TCI state, and the active TCI state is the same as the first priority TCI state. Also, this active TCI state may be determined as the second priority TCI state, and this candidate may be determined as the second priority CORESET. In this case, since the second priority CORESET is the same as the first priority CORESET, it may be expressed that there is no second priority CORESET.
- the UE is in the case where the candidate for the second priority COSET derived according to the above priority rule has two active TCI states, and one of the two active TCI states is the same as the first priority TCI state. , The other of the two active TCI states may be determined as the second preferred TCI state, or this candidate may be determined as the second preferred CORESET.
- the UE is in the case where the candidate for the second priority COSET derived according to the above priority rule has two active TCI states, and both of the two active TCI states are different from the first priority TCI state.
- one of the two active TCI states may be determined as the second priority TCI state, or this candidate may be determined as the second priority CORESET.
- One of the TCI states may be the one having the minimum or maximum TCI state ID of the two active TCI states, or the one corresponding to the first or second TCI state activated by MAC CE. It may be.
- FIG. 2 is a diagram showing an example of priority CORESET in the first embodiment 1.1.2.1.
- three CORESETs (CORESET # 1- # 3) overlap in time.
- the UE first selects CORESET # 1 corresponding to the CSS set as the priority CORESET. Since CORESET # 1 has one active TCI state, it is the operation of the first embodiment 1.1.2. This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- the UE searches for the second priority CORESET. Since one TCI state of CORESET # 3 is different from the TCI state # 1 of the preferred CORESET, the UE determines this TCI state # 2 as the second preferred TCI state and CORESET # 3 as the second preferred CORESET. And monitor.
- FIG. 3 is a diagram showing an example of priority CORESET in the first embodiment 1.1.2.1.
- two CORESETs (CORESET # 1- # 2) overlap in time.
- the UE first selects CORESET # 1 corresponding to the CSS set as the priority CORESET. Since CORESET # 1 has one active TCI state, it is the operation of the first embodiment 1.1.2. This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- the UE searches for the second priority CORESET. Since one of the two active TCI states of CORESET # 2 is the same as the first preferred TCI state, the UE determines the other of the two active TCI states (TCI state # 2) as the second preferred TCI state. CORESET # 2 is determined and monitored as the second priority CORESET.
- FIG. 4 is a diagram showing an example of priority CORESET in the first embodiment 1.1.2.1.
- two CORESETs (CORESET # 1- # 2) overlap in time.
- the UE first selects CORESET # 1 corresponding to the CSS set as the priority CORESET. Since CORESET # 1 has one active TCI state, it is the operation of the first embodiment 1.1.2. This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- the UE searches for the second priority CORESET. Since both of the two active TCI states of CORESET # 2 are different from the first preferred TCI state, the UE sets the TCI state (TCI state # 3) having the highest TCI state ID of the two active TCI states. Determined as the priority TCI state of 2, CORESET # 2 is determined as the second priority CORESET, and CORESET # 2 applies only TCI state # 3 to monitor PDCCH candidates.
- the UE first has two active TCI states from the remaining colliding CORESETs excluding the first preferred CORESET, and a subset of CORESETs in which one of the TCI states is the same as the first preferred TCI state. To determine.
- the UE sets the second priority CORESET from the subset to Rel.
- the decision is made according to the same priority rule as in 16. That is, the second preferred CORESET corresponds to the smallest index CSS set in the smallest index cell, if any, of the CORESETs included in the subset, otherwise in the smallest index cell. It may correspond to the USS set of the minimum index.
- the smallest USS set index is determined across all USS sets with at least one PDCCH candidate in overlapping PDCCH monitoring opportunities.
- the second priority TCI state corresponds to the active TCI state of the second priority CORESET that is different from the first priority TCI state.
- the PDCCH candidate in the second priority CORESET, can be monitored by using both the first priority TCI and the second priority TCI state.
- FIG. 5 is a diagram showing an example of priority CORESET in the 11.2.2 embodiment.
- four CORESETs (CORESET # 1- # 4) overlap in time.
- the UE first selects CORESET # 1 corresponding to the CSS set as the priority CORESET. Since CORESET # 1 has one active TCI state, it is the operation of the first embodiment 1.1.2. This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- the UE searches for the second priority CORESET.
- CORESET # 4 is the only CORESET that has two active TCI states and one of which has the same TCI status as the first preferred TCI status. Therefore, the UE determines the TCI state # 2, which is different from the first priority TCI state among the TCI states of CORESET # 4, as the second priority TCI state, and determines CORESET # 4 as the second priority CORESET.
- TCI states # 1 and # 2 are applied to monitor PDCCH candidates.
- the UE shall perform this CORESET if the following conditions (1.1.2a) or (1.1.2b) are satisfied. May be monitored: (1.1.2a) The one active TCI state is the same QCL type D as the first priority TCI state. (1.1.2b) The one active TCI state is the same QCL type D as the first priority TCI state or the second priority TCI state.
- FIG. 6 is a diagram showing an example of the priority CORESET in the first embodiment and another CORESET to be monitored at the same time.
- three CORESETs (CORESET # 1- # 3) overlap in time.
- the UE first selects CORESET # 1 corresponding to the CSS set as the priority CORESET. Since CORESET # 1 has one active TCI state, it is the operation of the first embodiment 1.1.2. This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- CORESET # 2 is the only CORESET that has two active TCI states and one of which has the same TCI status as the first preferred TCI status. Therefore, the UE determines the TCI state # 2, which is different from the first priority TCI state among the TCI states of CORESET # 2, as the second priority TCI state, and determines CORESET # 2 as the second priority CORESET.
- TCI states # 1 and # 2 are applied to monitor PDCCH candidates.
- the UE does not monitor CORESET # 3 when considering the condition (1.1.2a).
- the UE monitors CORESET # 3 when considering the condition (1.1.2b).
- the UE shall have the following conditions (1.1.2c) or (1.1.2d) or (1.1.2e).
- This CORESET may be monitored if is satisfied: (1.1.2c)
- the two active TCI states are the same QCL type D as the first priority TCI state and the second priority TCI state.
- (1.1.2d) One of the two active TCI states is the same QCL type D as the first preferred TCI state.
- One of the two active TCI states is the same QCL type D as either the first preferred TCI state or the second preferred TCI state.
- the UE monitors the CORESET by applying only the TCI state which is the same QCL type D as the first priority TCI state.
- the UE applies only the TCI state, which is the same QCL type D as either the first priority TCI state or the second priority TCI state, to perform the CORESET. Monitor.
- FIG. 7 is a diagram showing an example of the priority CORESET in the first embodiment and another CORESET to be monitored at the same time.
- four CORESETs (CORESET # 1- # 4) overlap in time.
- the UE first selects CORESET # 1 corresponding to the CSS set as the priority CORESET. Since CORESET # 1 has one active TCI state, it is the operation of the first embodiment 1.1.2. This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- the UE searches for the second priority CORESET.
- CORESETs # 2- # 4 CORESETs having two active TCI states, one of which has the same TCI state as the first preferred TCI state, are CORESETs # 2 and # 3.
- the UE determines CORESET # 2, which has a smaller SS set index, as the second preferred CORESET.
- the UE determines TCI state # 2, which is different from the first priority TCI state among the TCI states of CORESET # 2, as the second priority TCI state, and applies TCI states # 1 and # 2 in CORESET # 2 to PDCCH. Monitor candidates.
- the UE does not monitor CORESET # 3 when considering the condition (1.1.2c).
- the UE monitors CORESET # 3 by applying only TCI state # 1 when considering the condition (1.1.2d) or (1.1.2e).
- the UE does not monitor CORESET # 4 when considering the condition (1.1.2c) or (1.1.2d).
- the UE monitors COSET # 4 by applying only TCI state # 2 when considering the condition (1.1.2e).
- Embodiment 1.2 The priority rules of embodiment 1.2 are as follows: Step 1: Of the colliding CORESETs, if there is a subset of CORESETs having two active TCI states, then only Rel. 16 Apply the NR priority rule. If the priority CORESET is found, the step ends. If not, proceed to step 2. Step 2: If no preferred CORESET is found in Step 1, Rel. 16 Apply the NR priority rule.
- the order is: CSS set with two active TCI states> USS set with two active TCI states> CSS set with one active TCI state> USS set with one active TCI state. Then, the UE determines the priority CORESET according to the priority rule that the CORESET to be monitored is preferentially determined.
- SS sets of the same type having the same number of active TCI states have smaller indexes (that is, smaller cell indexes. If the cell indexes are the same, the SS set indexes are further higher. The smaller one) is selected as the preferred CORESET.
- the CORESET to be monitored may be determined from the CORESET other than the priority CORESET. That is, for a CORESET other than the preferred CORESET and having one active TCI state, if the one active TCI state is the same QCL type D as either of the two active TCI states of the preferred CORESET, The UE may monitor this CORESET.
- the UE performs this CORESET when the above-mentioned (1.1.1a) or (1.1.1b) is satisfied. May be monitored.
- FIG. 8 is a diagram showing an example of the priority CORESET in the 1.2 embodiment and another CORESET to be monitored at the same time.
- four CORESETs (CORESET # 1- # 4) overlap in time.
- the CORESETs having two active TCI states are CORESET # 3 and # 4, and CORESET # 3 corresponding to the smaller SS set index is selected as the preferred CORESET.
- CORESET # 1 Since one TCI state of CORESET # 1 is the same QCL type D as the TCI state # 1 of priority CORESET, the UE monitors CORESET # 1.
- TCI state of CORESET # 2 is the same QCL type D as TCI state # 2 of priority CORESET, the UE monitors CORESET # 2.
- One of the two TCI states of CORESET # 4 is the same QCL type D as the TCI state # 1 of the preferred CORESET, but the other is a QCL type D (TCI state # 3) different from the TCI state # 2 of the preferred CORESET. .. Therefore, the UE according to the above (1.1.1a) does not monitor CORESET # 4. The UE according to the above (1.1.1b) monitors CORESET # 4 by applying only TCI state # 1.
- Step 1 Of the colliding CORESETs, if there is a CORESET having two active TCI states and corresponding to the CSS set of the smallest index in the cell of the smallest index including the CSS set, this is determined as the priority CORESET. And finish the step. If not, proceed to step 2.
- Step 2 Of the colliding CORESETs, if there is a CORESET having one active TCI state and corresponding to the CSS set of the smallest index in the cell of the smallest index including the CSS set, this is determined as the priority CORESET. And finish the step. If not, proceed to step 3.
- Step 3 Of the colliding CORESETs, if there is a CORESET having two active TCI states and corresponding to the USS set of the smallest index in the cell of the smallest index including the USS set, this is determined as the preferred CORESET. And finish the step. If not, the process proceeds to step 4.
- Step 4 Of the colliding CORESETs, if there is a CORESET having one active TCI state and corresponding to the USS set of the smallest index in the cell of the smallest index including the USS set, this is determined as the preferred CORESET. And finish the step.
- the order is: CSS set with two active TCI states> CSS set with one active TCI state> USS set with two active TCI states> USS set with one active TCI state. Then, the UE determines the priority CORESET according to the priority rule that the CORESET to be monitored is preferentially determined.
- SS sets of the same type having the same number of active TCI states have smaller indexes (that is, smaller cell indexes. If the cell indexes are the same, the SS set indexes are further higher. The smaller one) is selected as the preferred CORESET.
- the UE may further determine the CORESET to be monitored from the CORESET other than the Priority CORESET based on the first embodiment 1.1.1.
- the UE may further determine the CORESET to be monitored from the CORESET other than the Priority CORESET based on the first embodiment 1.1.2.
- a second embodiment relates to an FDM PDCCH repeating scheme.
- two SS sets with the corresponding plurality of CORESETs may be used for PDCCH repetition.
- the association between the two SS sets and the plurality of CORESETs may be specified in advance by specifications, or may be set in the UE by higher layer signaling (for example, RRC signaling).
- the UE determines the priority CORESET based on at least one priority rule shown in the second embodiment 2.1-2-3. Each will be described below.
- the association between a certain CORESET (for example, priority CORESET) and another CORESET may be specified in advance by a specification, or may be set in the UE by higher layer signaling (for example, RRC signaling). Further, the association is not limited to CORESETs, and CORESETs and SS sets may be associated with each other, or SS sets may be associated with each other.
- the priority CORESET may be read as "SS set corresponding to the priority CORESET / Priority CORESET”. Further, in the second embodiment, another CORESET may be read as "another CORESET / SS set corresponding to another CORESET”.
- association of the second embodiment may be referred to as an association for collision control of a plurality of PDCCHs, an association for selecting CORESET for PDCCH monitoring, an association for prioritizing CORESET, and the like.
- the priority rule of the second embodiment is Rel. Same as 16 NR. That is, the UE monitors the CSS set preferentially over the USS set, and the SS sets of the same type (CSS or USS) have the smaller index (that is, the smaller cell index. If the cell index is the same).
- the preferred CORESET is determined according to the priority rule that the SS set index (whichever is smaller) is preferentially monitored.
- Embodiment 2.1 is further broadly divided into the following two: Embodiment 2.1.1: A preferred CORESET is associated with another CORESET. 2.1.2: The preferred CORESET is not associated with another CORESET.
- the UE may monitor another CORESET associated with the Priority CORESET at the same time as the Priority CORESET.
- the TCI state of the priority CORESET may be referred to as the first priority TCI state (1st priority TCI state). Further, the TCI state of the other CORESET may be referred to as a second priority TCI state (2nd priority TCI state).
- the UE monitors this CORESET if the following conditions (2.1.1a) or (2.1.1b) are met. May: (2.1.1a) The TCI state is the same QCL type D as the first priority TCI state. (2.1.1b) The TCI state is the same QCL type D as the first priority TCI state or the second priority TCI state.
- FIG. 9 is a diagram showing an example of the priority CORESET in the second embodiment and another CORESET to be monitored at the same time.
- three CORESETs (CORESET # 1- # 3) overlap in time.
- CORESET # 1 and # 2 are related to each other.
- the UE first selects CORESET # 1 corresponding to the USS set of the smallest USS set index as the preferred CORESET. Since CORESET # 1 has another CORESET (CORESET # 2) associated with it, it is the operation of the second embodiment.
- CORESET # 2 Since CORESET # 2 is associated with the preferred CORESET, the UE monitors CORESET # 2. The UE determines the active TCI state of CORESET # 2 as the second priority TCI state.
- CORESET # 3 is not associated with a preferred CORESET, but the active TCI state of CORESET # 3 is the same QCL type D as the second preferred TCI state. Therefore, the UE according to the above (2.1.1a) does not monitor CORESET # 3. The UE according to (2.1.1b) above monitors CORESET # 3.
- the priority CORESET that is first determined according to the same priority rule as 16 NR is also called the first priority CORESET, and the priority CORESET other than the first priority CORESET that is determined next is also called the second priority CORESET.
- the second priority CORESET may be referred to as CORESET X.
- the active TCI state of the first priority CORESET may be called the first priority TCI state (1st priority TCI state).
- the active TCI state of the second priority CORESET may be referred to as the second priority TCI state (2nd priority TCI state).
- the second embodiment 2.1.2 is roughly classified into the second embodiment 2.1.2.1 and 2.1.2.2 according to the method for determining the second priority CORESET.
- the second priority CORESET is from the remaining colliding CORESETs excluding the first priority CORESET, Rel. It may be determined according to the same priority rule as 16. That is, the second preferred CORESET corresponds to the smallest index CSS set in the smallest index cell, if any, of the remaining conflicting CORESETs, otherwise the smallest in the smallest index cell. It may correspond to the USS set of indexes. The smallest USS set index is determined across all USS sets with at least one PDCCH candidate in overlapping PDCCH monitoring opportunities.
- the next candidate (CORESET corresponding to the SS set / cell of the next minimum index) is selected. It may be searched as a candidate for the second priority CORESET. That is, the UE may continue the search for the second priority CORESET until the active TCI state is different from the first priority TCI state.
- the UE determines this active TCI state as the second priority TCI state, and sets this CORESET as the second priority TCI state. It may be determined as the priority CORESET of 2.
- the UE sets this active TCI state as the second priority TCI state. It may be determined and this candidate may be determined as the second priority CORESET. In this case, since the second priority CORESET is the same as the first priority CORESET, it may be expressed that there is no second priority CORESET.
- FIG. 10 is a diagram showing an example of priority CORESET in the second embodiment 2.1.2.1.
- three CORESETs (CORESET # 1- # 3) overlap in time.
- the UE first selects CORESET # 1 corresponding to the USS set of the smallest USS set index as the preferred CORESET. Since CORESET # 1 does not have another CORESET associated with it, it is the operation of the second embodiment.
- This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- the UE searches for the second priority CORESET. Since the TCI state (TCI state # 2) of CORESET # 3 is different from the TCI state # 1 of priority CORESET, the UE determines this TCI state # 2 as the second preferred TCI state and CORESET # 3 as the second preferred TCI state. Determine as priority CORESET and monitor.
- the UE first determines from the remaining conflicting CORESETs, excluding the first preferred CORESET, a subset of CORESETs that are associated with another CORESET and have the same TCI state as the first preferred TCI state.
- the UE sets the second priority CORESET from the subset to Rel. It may be decided according to the same priority rule as 16. That is, the second preferred CORESET corresponds to the smallest index CSS set in the smallest index cell, if any, of the CORESETs included in the subset, otherwise in the smallest index cell. It may correspond to the USS set of the minimum index. The smallest USS set index is determined across all USS sets with at least one PDCCH candidate in overlapping PDCCH monitoring opportunities.
- the second preferred TCI state may correspond to the active TCI state of another CORESET associated with the second preferred CORESET.
- the second priority CORESET may be a CORESET included in the subset, if any, associated with the CORESET corresponding to the CSS set of the smallest index in the cell of the smallest index including the CSS set. Otherwise, it may be the CORESET associated with the CORESET corresponding to the USS set of the smallest index in the cell with the smallest index.
- the second priority TCI state may correspond to the active TCI state of the second priority CORESET.
- FIG. 11 is a diagram showing an example of priority CORESET in the 2.1.2.2 embodiment.
- four CORESETs (CORESET # 1- # 4) overlap in time.
- CORESET # 1 is not associated with other CORESETs.
- CORESET # 2 is not associated with any other CORESET.
- CORESET # 3 and # 4 are associated with each other.
- the UE first selects CORESET # 1 corresponding to the USS set of the smallest USS set index as the preferred CORESET. Since CORESET # 1 does not have another CORESET associated with it, it is the operation of the second embodiment.
- This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- CORESET # 3 is the only CORESET that has another CORESET associated with it and whose TCI state is the same as the first preferred TCI state. Therefore, the UE determines CORESET # 3 as the second preferred CORESET and the TCI state # 2 of CORESET # 4 associated with CORESET # 3 as the second preferred TCI state. The UE monitors PDCCH candidates in CORESET # 3 and # 4.
- the UE may monitor the CORESETs if the following conditions (2.1.2a) or (2.1.2b) are met: (2.1.2a)
- the TCI state is the same QCL type D as the first priority TCI state.
- the TCI state is the same QCL type D as the first priority TCI state or the second priority TCI state.
- FIG. 12 is a diagram showing an example of the priority CORESET in the second embodiment and another CORESET to be monitored at the same time.
- four CORESETs (CORESET # 1- # 4) overlap in time.
- CORESET # 1 is not associated with other CORESETs.
- CORESET # 2 and # 3 are associated with each other.
- the UE first selects CORESET # 1 corresponding to the USS set of the smallest USS set index as the preferred CORESET. Since CORESET # 1 does not have another CORESET associated with it, it is the operation of the second embodiment.
- This priority CORESET corresponds to the first priority CORESET, and the TCI state # 1 corresponds to the first priority TCI state.
- CORESET # 2 is the only CORESET that has another CORESET associated with it and whose TCI state is the same as the first preferred TCI state. Therefore, the UE determines CORESET # 2 as the second preferred CORESET and the TCI state # 2 of CORESET # 3 associated with CORESET # 2 as the second preferred TCI state. The UE monitors PDCCH candidates in CORESET # 2 and # 3.
- the UE does not monitor CORESET # 4 when considering the condition (2.1.2a).
- the UE monitors CORESET # 4 when considering the condition (2.1.2b).
- Embodiment 2.2 The priority rules of Embodiment 2.2 are as follows: Step 1: Of the conflicting CORESETs, if there is a subset of CORESETs associated with (in other words, having an association with another CORESET) with another CORESET, then only those subsets of Rel. 16 Apply the NR priority rule. If the priority CORESET is found, the step ends. If not, proceed to step 2. Step 2: If no preferred CORESET is found in step 1, only a subset of the CORESETs that collide that have no association with another CORESETs will be Rel. 16 Apply the NR priority rule.
- association there is a CSS set having an association with another CORESET (hereinafter, also simply referred to as "association" in the present disclosure)> a USS set with an association> a CSS set without an association> an association.
- the UE determines the preferred CORESET according to the priority rule that the CORESET to be monitored is preferentially determined in the order of the USS set that does not.
- SS sets of the same type that have (or do not have an association) associations have smaller indexes (that is, smaller cell indexes. If the cell indexes are the same, further SS set indexes. Whichever is smaller) is selected as the preferred CORESET.
- the CORESET to be monitored may be determined from the CORESET other than the priority CORESET. That is, for the remaining CORESETs excluding the preferred CORESET and another CORESET associated with the preferred CORESET, the UE will perform if the above (2.1.1a) or (2.1.1b) is satisfied. , This CORESET may be monitored.
- FIG. 13 is a diagram showing an example of the priority CORESET in the second embodiment and another CORESET to be monitored at the same time.
- four CORESETs (CORESET # 1- # 4) overlap in time.
- CORESET # 1 is not associated with other CORESETs.
- CORESET # 2 and # 3 are associated with each other.
- the CORESETs associated with another CORESET are CORESET # 2 and # 3, and the CORESET # 2 corresponding to the smaller SS set index is selected as the preferred CORESET.
- the TCI state # 2 of CORESET # 2 corresponds to the first priority TCI state.
- the TCI state # 3 of CORESET # 3 associated with the priority CORESET is determined as the second preferred TCI state.
- the UE monitors PDCCH candidates in CORESET # 2 and # 3.
- the UE Since the TCI state of CORESET # 1 is neither the first priority TCI state nor the second TCI state, the UE does not monitor CORESET # 1. Further, the UE according to the above (2.1.1a) does not monitor CORESET # 4. The UE according to (2.1.1b) above monitors CORESET # 4.
- Embodiment 2.3 The priority rules of Embodiment 2.3 are as follows: -Step 1: If there is a CORESET that has an association among the colliding CORESETs and corresponds to the CSS set of the minimum index in the cell of the minimum index including the CSS set, this is determined as the priority CORESET and the step is set. finish. If not, proceed to step 2. -Step 2: If there is a CORESET that has no association among the colliding CORESETs and corresponds to the CSS set of the minimum index in the cell of the minimum index including the CSS set, this is determined as the priority CORESET, and the step. To finish. If not, proceed to step 3.
- -Step 3 If there is a CORESET that has an association among the colliding CORESETs and corresponds to the USS set of the smallest index in the cell of the smallest index including the USS set, this is determined as the priority CORESET and the step is set. finish. If not, the process proceeds to step 4.
- -Step 4 If there is a CORESET that has no association among the colliding CORESETs and corresponds to the USS set of the minimum index in the cell of the minimum index including the USS set, this is determined as the priority CORESET and the step. To finish.
- the CORESET to be monitored is preferentially determined in the order of the CSS set having an association> the CSS set having no association> the USS set having an association> the USS set having no association.
- the UE determines the priority CORESET.
- SS sets of the same type that have (or do not have an association) associations have smaller indexes (that is, smaller cell indexes. If the cell indexes are the same, further SS set indexes. Whichever is smaller) is selected as the preferred CORESET.
- the UE may further determine the CORESET to be monitored from the CORESET other than the Priority CORESET based on the second embodiment.
- the UE may further determine the CORESET to be monitored from the CORESET other than the Priority CORESET based on the second embodiment.
- the particular UE capability may indicate at least one of the following: -Whether or not to support the SFN PDCCH repetition scheme, -Whether or not to support the FDM PDCCH repetition scheme, • Whether to support the SFN PDCCH iteration scheme for CSS sets, ⁇ Whether to support the FDM PDCCH iteration scheme for CSS sets, -Whether or not to support simultaneous reception of two or more different QCL type D PDCCHs.
- At least one of the above-described embodiments may be applied when the UE is set with specific information related to the above-described embodiment by higher layer signaling (if not set, for example, Rel.15 / Apply 16 actions).
- the particular information may be information indicating that the SFN / FDM PDCCH iteration scheme is enabled, arbitrary RRC parameters for a particular release (eg, Rel.17), and the like.
- the first embodiment is not limited to the case where the UE sets (or uses) the SFN PDCCH repetition scheme, and can be applied to the case where two or more TCI states are activated per one CORESET. be.
- the second embodiment is not limited to the case where the UE sets (or uses) the FDM PDCCH repetition scheme, and is applied to the case where two SS sets having a plurality of corresponding CORESETs are used for the PDCCH. It is possible.
- wireless communication system Wireless communication system
- communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
- FIG. 14 is a diagram showing an example of a schematic configuration of a wireless communication system according to an 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 Third Generation Partnership Project (3GPP). ..
- the radio communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E).
- -UTRA Dual Connectivity (NE-DC) may be included.
- the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
- the base station (gNB) of NR is MN
- the base station (eNB) of LTE (E-UTRA) is SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations in 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.
- a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
- NR-NR Dual Connectivity NR-DC
- gNB NR base stations
- the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
- the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
- the user terminal 20 may be connected to at least one of the plurality of base stations 10.
- the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
- CA Carrier Aggregation
- DC dual connectivity
- CC Component Carrier
- Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
- the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
- FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
- the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
- the user terminal 20 may perform communication 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
- the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
- a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- DL Downlink
- UL Uplink
- 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
- the wireless access method may be called a waveform.
- another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
- the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
- downlink shared channels Physical Downlink Shared Channel (PDSCH)
- broadcast channels Physical Broadcast Channel (PBCH)
- downlink control channels Physical Downlink Control
- Channel PDCCH
- the uplink shared channel Physical Uplink Shared Channel (PUSCH)
- the uplink control channel Physical Uplink Control Channel (PUCCH)
- the random access channel shared by each user terminal 20 are used.
- Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
- PDSCH User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
- User data, upper layer control information, and the like may be transmitted by the PUSCH.
- MIB Master Information Block
- PBCH Master Information Block
- Lower layer control information may be transmitted by PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of 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.
- the PDSCH may be read as DL data
- the PUSCH may be read as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect PDCCH.
- CORESET corresponds to a resource for searching DCI.
- the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
- One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space 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.
- the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
- channel state information (Channel State Information (CSI)
- delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
- scheduling request (Scheduling Request () Uplink Control Information (UCI) including at least one of SR)
- the PRACH may transmit a random access preamble to establish a connection with the cell.
- downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
- a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
- the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
- Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
- the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
- SS, SSB and the like may also be called a reference signal.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS Uplink Reference Signal
- UE-specific Reference Signal UE-specific Reference Signal
- FIG. 15 is a diagram showing an example of the configuration of the base station according to the embodiment.
- the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
- the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in 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 part described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
- the control unit 110 may control transmission / reception, measurement, and the like 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, and the like, and transfer the data to the transmission / reception unit 120.
- the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
- the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
- the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
- the transmission / reception unit 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on common recognition in the technical fields 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 composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
- the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
- the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog conversion, and other transmission processing.
- IFFT inverse fast Fourier transform
- the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
- the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
- the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- the transmission / reception unit 120 may perform measurement on the received signal.
- the measuring unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
- the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- Signal strength for example, Received Signal Strength Indicator (RSSI)
- propagation path information for example, CSI
- the measurement result may be output to the control unit 110.
- the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10 and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
- the transmitting unit and the receiving unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the transmission / reception unit 120 transmits at least one of the downlink control channels (Physical Downlink Control Channel (PDCCH)) in a plurality of time-overlapping control resource sets (Control Resource Set (CORESET)) to the user terminal 20. You may.
- PDCCH Physical Downlink Control Channel
- CORESET Control Resource Set
- control unit 110 controls the PDCCH to be monitored by the user terminal 20 based on CORESET in which two transmission setting instruction states (Transmission Configuration Indication state (TCI state)) are activated. good.
- TCI state Transmission Configuration Indication state
- control unit 110 controls the user terminal 20 to determine the PDCCH to be monitored based on the association between CORESETs (for example, whether one CORESET is associated with another CORESET).
- FIG. 16 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
- the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in 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 part described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be composed of a controller, a control circuit, and the like described based on the 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, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
- the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
- the transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223.
- the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
- the transmission / reception unit 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmission / reception circuit, and the like, which are described based on the 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 composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
- the transmitting / receiving antenna 230 can be composed of an antenna described based on the common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , 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, control information, etc. acquired from the control unit 210.
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
- Whether or not to apply the DFT process may be based on the transform precoding setting.
- the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
- the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
- the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
- the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
- the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmission / reception unit 220 may perform measurement on the received signal.
- the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
- the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmitter and receiver of the user terminal 20 in the present disclosure may be composed of at least one of the transmitter / receiver 220 and the transmitter / receiver antenna 230.
- the control unit 210 transmits two PDCCHs to be monitored among the downlink control channels (Physical Downlink Control Channel (PDCCH)) in a plurality of time-overlapping control resource sets (Control Resource Set (CORESET)).
- the setting instruction state (Transmission Configuration Indication state (TCI state)) may be determined based on the activated CORESET.
- the transmission / reception unit 220 may monitor the determined PDCCH.
- the control unit 210 selects the CORESET corresponding to the common search space (Common Search Space (CSS)) set from the CORESET corresponding to the UE-specific Search Space (USS) set among the plurality of CORESETs.
- the PDCCH to be monitored may be determined so as to be monitored preferentially.
- the control unit 210 has a CORESET corresponding to a common search space (CSS) set having two active TCI states among the plurality of CORESETs, and a UE-specific search space (UE-) having two active TCI states. Priority is given to monitoring in the order of CORESET corresponding to the specific Search Space (USS)) set, CORESET corresponding to the CSS set having one active TCI state, and CORESET corresponding to the USS set having one active TCI state. In addition, the PDCCH to be monitored may be determined.
- SSS Search Space
- UE- UE-specific search space
- the control unit 210 has a CORESET corresponding to a common search space (CSS) set having two active TCI states among the plurality of CORESETs, and a CORESET corresponding to a CSS set having one active TCI state. Priority is given to monitoring the CORESET corresponding to the UE-specific Search Space (USS) set having two active TCI states, and the CORESET corresponding to the USS set having one active TCI state. In addition, the PDCCH to be monitored may be determined.
- CSS common search space
- USS UE-specific Search Space
- control unit 210 sets the PDCCH to be monitored among the downlink control channels (Physical Downlink Control Channel (PDCCH)) in a plurality of time-overlapping control resource sets (Control Resource Set (CORESET)) between the CORESETs. It may be determined based on the association.
- PDCH Physical Downlink Control Channel
- CORESET Control Resource Set
- the transmission / reception unit 220 may monitor the determined PDCCH.
- the control unit 210 selects the CORESET corresponding to the common search space (Common Search Space (CSS)) set from the CORESET corresponding to the UE-specific Search Space (USS) set among the plurality of CORESETs.
- the PDCCH to be monitored may be determined so as to be monitored preferentially.
- the control unit 210 has a CORESET corresponding to a common search space (CSS) set having an association with another CORESET, and a UE-specific search space having an association with another CORESET among the plurality of CORESETs.
- the PDCCH to be monitored may be determined so as to be monitored preferentially.
- the control unit 210 corresponds to a CORESET corresponding to a common search space (CSS) set having an association with another CORESET and a CSS set having no association with another CORESET among the plurality of CORESETs.
- the PDCCH to be monitored may be determined so as to be monitored preferentially.
- each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the method of realizing each of them is not particularly limited.
- the base station, user terminal, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 17 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the base station 10 and the 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 the devices shown in the figure, or may be configured not to include some of the devices.
- processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
- the processor 1001 may be mounted by one or more chips.
- the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- predetermined software program
- Processor 1001 operates, for example, an operating system to control 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 unit, a register, and the like.
- CPU central processing unit
- control unit 110 210
- transmission / reception unit 120 220
- the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program code
- the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
- the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
- the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disk, a floppy (registered trademark) disk, an optical magnetic disk (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disk, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an 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.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings.
- channels, symbols and signals may be read interchangeably.
- the signal may be a message.
- the reference signal may be abbreviated as RS, and may be referred to as a pilot, a pilot signal, or the like depending on the applied standard.
- the component carrier Component Carrier (CC)
- CC Component Carrier
- the wireless frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
- the subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
- the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
- SCS subcarrier Spacing
- TTI Transmission Time Interval
- a specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may be a time unit based on numerology.
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
- the mini-slot may also be referred to as a sub-slot.
- a minislot may consist of a smaller number of symbols than the slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
- one subframe may be called TTI
- a plurality of consecutive subframes may be called TTI
- one slot or one minislot may be called 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. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (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 referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
- Physical RB Physical RB (PRB)
- SCG sub-carrier Group
- REG resource element group
- the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth Part (which may also be called partial bandwidth, etc.) represents a subset of consecutive common resource blocks (RBs) for a numerology in a carrier. May be good.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given channel / signal outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
- Information, signals, etc. may be input / output via a plurality of 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 / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
- the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods.
- the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), Medium Access Control (MAC) signaling), other signals or combinations thereof May be carried out by.
- DCI downlink control information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB master information block
- SIB system information block
- MAC Medium Access Control
- the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
- the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
- CE MAC Control Element
- the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
- the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- the terms “system” and “network” used in this disclosure may be used interchangeably.
- the “network” may mean a device (eg, a base station) included in the network.
- precoding "precoding weight”
- QCL Quality of Co-Co-Location
- TCI state Transmission Configuration Indication state
- space "Spatial relation”, “spatial 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 compatible.
- Base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission point (Transmission Point (TP))
- RP Reception point
- TRP Transmission / Reception Point
- Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)).
- Communication services can also be provided by Head (RRH))).
- RRH Head
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.
- MS mobile station
- UE user equipment
- terminal terminal
- 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. , Handset, user agent, mobile client, 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 the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- communication between a base station and a user terminal has been replaced with communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the user terminal 20 may have the function of the base station 10 described above.
- words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
- the upstream channel, the downstream channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station 10 may have the functions of the user terminal 20 described above.
- the operation performed by the base station may be performed by its upper node (upper node) in some cases.
- various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
- Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
- each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG xG (xG (x is, for example, integer, fraction)
- 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
- LTE 802.11 Wi-Fi®
- LTE 802.16 WiMAX®
- LTE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other suitable radios. It may be applied to a system using a communication method, a next-generation system extended based on these, and the like.
- UMB Ultra-WideBand
- references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
- determining used in this disclosure may include a wide variety of actions.
- judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
- judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “judgment (decision)" of "accessing” (for example, accessing data in memory).
- judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
- connection are any direct or indirect connection or connection between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “joined” to each other.
- the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- the radio frequency region when two elements are connected, one or more wires, cables, printed electrical connections, etc. are used, and as some non-limiting and non-comprehensive examples, the radio frequency region, microwaves. It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having wavelengths in the region, light (both visible and invisible) regions, and the like.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
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Abstract
Description
NRでは、送信設定指示状態(Transmission Configuration Indication state(TCI状態))に基づいて、信号及びチャネルの少なくとも一方(信号/チャネルと表現する)のUEにおける受信処理(例えば、受信、デマッピング、復調、復号の少なくとも1つ)、送信処理(例えば、送信、マッピング、プリコーディング、変調、符号化の少なくとも1つ)を制御することが検討されている。
・QCLタイプA(QCL-A):ドップラーシフト、ドップラースプレッド、平均遅延及び遅延スプレッド、
・QCLタイプB(QCL-B):ドップラーシフト及びドップラースプレッド、
・QCLタイプC(QCL-C):ドップラーシフト及び平均遅延、
・QCLタイプD(QCL-D):空間受信パラメータ。
これまでのRel.15/16 NRの仕様においては、UEは、同じ時間において同じQCLタイプDのチャネル/信号のみを受信、検出又はモニタできるが、同じ時間において異なるQCLタイプDの複数のチャネル/信号を受信、検出又はモニタすることはできなかった。このため、複数のチャネル/信号が衝突する(言い換えると、重複する時間に送信/受信される)ケースでは当該複数のチャネル/信号が同じQCLタイプDに該当することを確保するように、又はこのようなケースを回避するように、以下に述べるような制約(優先ルール、QCL適用ルールなどと呼ばれてもよい)が、Rel.15/16 NRの仕様には規定されている。
UEがシングルセル動作を設定されるか、同じ周波数バンドのキャリアアグリゲーションの動作を設定される場合であって、1つ以上のセルのアクティブなDL BWPにおいて同じ又は異なるQCLタイプD特性を有する複数のCORESETにおいて、重複するモニタリング機会でPDCCH候補をモニタする場合には、当該複数のCORESETのうちの、あるCORESETと、当該CORESETと同じQCLタイプD特性を有するCORESETと、のみにおけるPDCCHをモニタする。
ところで、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、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UL送信を行うことが検討されている。
<第1の実施形態>
第1の実施形態は、SFN PDCCH繰り返しスキームに関する。
実施形態1.1の優先ルールは、Rel.16 NRと同じである。つまり、UEは、CSSセットがUSSセットより優先的にモニタされ、また同じ種類(CSS又はUSS)のSSセット同士ではインデックスの小さい方(つまり、セルインデックスがより小さい方。セルインデックスが同じ場合は、さらに、SSセットインデックスがより小さい方)が優先的にモニタされるという優先ルールに従って、優先CORESETを決定する。
・実施形態1.1.1:優先CORESETが2つのアクティブTCI状態(2つのQCLタイプD)を有する、
・実施形態1.1.2:優先CORESETが1つのアクティブTCI状態(1つのQCLタイプD)を有する。
優先CORESET以外のCORESETであって、1つのアクティブTCI状態を有するCORESETについては、当該1つのアクティブTCI状態が優先CORESETの2つのアクティブTCI状態のいずれかと同じQCLタイプDである場合には、UEはこのCORESETをモニタしてもよい。
(1.1.1a)当該2つのアクティブTCI状態が優先CORESETの2つのアクティブTCI状態と同じQCLタイプDである、
(1.1.1b)当該2つのアクティブTCI状態の1つが優先CORESETの2つのアクティブTCI状態の1つと同じQCLタイプDである。
実施形態1.1.2について、Rel.16 NRと同じ優先ルールに従ってまず決定される1つのアクティブTCI状態を有する優先CORESETのことを、第1の優先CORESETとも呼び、その次に決定される第1の優先CORESET以外の優先CORESETのことを、第2の優先CORESETとも呼ぶ。第2の優先CORESETは、CORESET Xと呼ばれてもよい。
第2の優先CORESETは、第1の優先CORESETを除いた残りの衝突するCORESETから、Rel.16と同様の優先ルールに従って決定されてもよい。つまり、第2の優先CORESETは、残りの衝突するCORESETのうち、もしあれば、CSSセットを含む最小インデックスのセルにおける最小インデックスのCSSセットに対応し、そうでなければ、最小インデックスのセルにおける最小インデックスのUSSセットに対応してもよい。最小のUSSセットインデックスは、重複するPDCCHモニタリング機会における少なくとも1つのPDCCH候補を有する全てのUSSセットにわたって決定される。
UEは、第1の優先CORESETを除いた残りの衝突するCORESETから、まず、2つのアクティブTCI状態を有し、かつそのうちの一方のTCI状態が第1の優先TCI状態と同じであるCORESETのサブセットを決定する。
実施形態1.1.2における優先CORESET(第1の優先CORESET及び第2の優先CORESET)以外のCORESETのモニタについて説明する。
(1.1.2a)当該1つのアクティブTCI状態が第1の優先TCI状態と同じQCLタイプDである、
(1.1.2b)当該1つのアクティブTCI状態が第1の優先TCI状態又は第2の優先TCI状態と同じQCLタイプDである。
(1.1.2c)当該2つのアクティブTCI状態が、第1の優先TCI状態及び第2の優先TCI状態と同じQCLタイプDである、
(1.1.2d)当該2つのアクティブTCI状態の1つが、第1の優先TCI状態と同じQCLタイプDである、
(1.1.2e)当該2つのアクティブTCI状態の1つが、第1の優先TCI状態及び第2の優先TCI状態のいずれかと同じQCLタイプDである。
実施形態1.2の優先ルールは、以下のとおりである:
・ステップ1:衝突するCORESETのうち、2つのアクティブTCI状態を有するCORESETのサブセットがあれば、それらのみに対してRel.16 NRの優先ルールを適用する。優先CORESETが発見されればステップを終了する。そうでない場合、ステップ2に進む。
・ステップ2:ステップ1において優先CORESETが発見されなければ、衝突するCORESETのうち、1つのアクティブTCI状態を有するCORESETのサブセットのみに対してRel.16 NRの優先ルールを適用する。
実施形態1.3の優先ルールは、以下のとおりである:
・ステップ1:衝突するCORESETのうち、2つのアクティブTCI状態を有するCORESETであって、CSSセットを含む最小インデックスのセルにおける最小インデックスのCSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。そうでない場合、ステップ2に進む。
・ステップ2:衝突するCORESETのうち、1つのアクティブTCI状態を有するCORESETであって、CSSセットを含む最小インデックスのセルにおける最小インデックスのCSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。そうでない場合、ステップ3に進む。
・ステップ3:衝突するCORESETのうち、2つのアクティブTCI状態を有するCORESETであって、USSセットを含む最小インデックスのセルにおける最小インデックスのUSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。そうでない場合、ステップ4に進む。
・ステップ4:衝突するCORESETのうち、1つのアクティブTCI状態を有するCORESETであって、USSセットを含む最小インデックスのセルにおける最小インデックスのUSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。
第2の実施形態は、FDM PDCCH繰り返しスキームに関する。
実施形態2.1の優先ルールは、Rel.16 NRと同じである。つまり、UEは、CSSセットがUSSセットより優先的にモニタされ、また同じ種類(CSS又はUSS)のSSセット同士ではインデックスの小さい方(つまり、セルインデックスがより小さい方。セルインデックスが同じ場合は、さらに、SSセットインデックスがより小さい方)が優先的にモニタされるという優先ルールに従って、優先CORESETを決定する。
・実施形態2.1.1:優先CORESETが別のCORESETに関連付けられている、
・実施形態2.1.2:優先CORESETが別のCORESETに関連付けられていない。
UEは、優先CORESETに関連する別のCORESETを、優先CORESETと同時にモニタしてもよい。
(2.1.1a)TCI状態が第1の優先TCI状態と同じQCLタイプDである、
(2.1.1b)TCI状態が第1の優先TCI状態又は第2の優先TCI状態と同じQCLタイプDである。
実施形態2.1.2について、Rel.16 NRと同じ優先ルールに従ってまず決定される優先CORESETのことを、第1の優先CORESETとも呼び、その次に決定される第1の優先CORESET以外の優先CORESETのことを、第2の優先CORESETとも呼ぶ。第2の優先CORESETは、CORESET Xと呼ばれてもよい。
第2の優先CORESETは、第1の優先CORESETを除いた残りの衝突するCORESETから、Rel.16と同様の優先ルールに従って決定されてもよい。つまり、第2の優先CORESETは、残りの衝突するCORESETのうち、もしあれば、CSSセットを含む最小インデックスのセルにおける最小インデックスのCSSセットに対応し、そうでなければ、最小インデックスのセルにおける最小インデックスのUSSセットに対応してもよい。最小のUSSセットインデックスは、重複するPDCCHモニタリング機会における少なくとも1つのPDCCH候補を有する全てのUSSセットにわたって決定される。
UEは、第1の優先CORESETを除いた残りの衝突するCORESETから、まず、別のCORESETに関連付けられており、かつTCI状態が第1の優先TCI状態と同じであるCORESETのサブセットを決定する。
実施形態2.1.2における優先CORESET(第1の優先CORESET及び第2の優先CORESET)及び優先CORESETに関連付けられるCORESET以外のCORESETのモニタについて説明する。
(2.1.2a)TCI状態が第1の優先TCI状態と同じQCLタイプDである、
(2.1.2b)TCI状態が第1の優先TCI状態又は第2の優先TCI状態と同じQCLタイプDである。
実施形態2.2の優先ルールは、以下のとおりである:
・ステップ1:衝突するCORESETのうち、別のCORESETに関連付けられる(言い換えると、別のCORESETとの関連付けを有する)CORESETのサブセットがあれば、それらのみに対してRel.16 NRの優先ルールを適用する。優先CORESETが発見されればステップを終了する。そうでない場合、ステップ2に進む。
・ステップ2:ステップ1において優先CORESETが発見されなければ、衝突するCORESETのうち、別のCORESETとの関連付けを有しないCORESETのサブセットのみに対してRel.16 NRの優先ルールを適用する。
実施形態2.3の優先ルールは、以下のとおりである:
・ステップ1:衝突するCORESETのうち、関連付けを有するCORESETであって、CSSセットを含む最小インデックスのセルにおける最小インデックスのCSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。そうでない場合、ステップ2に進む。
・ステップ2:衝突するCORESETのうち、関連付けを有しないCORESETであって、CSSセットを含む最小インデックスのセルにおける最小インデックスのCSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。そうでない場合、ステップ3に進む。
・ステップ3:衝突するCORESETのうち、関連付けを有するCORESETであって、USSセットを含む最小インデックスのセルにおける最小インデックスのUSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。そうでない場合、ステップ4に進む。
・ステップ4:衝突するCORESETのうち、関連付けを有しないCORESETであって、USSセットを含む最小インデックスのセルにおける最小インデックスのUSSセットに対応するCORESETがあれば、これを優先CORESETとして決定し、ステップを終了する。
なお、上述の実施形態の少なくとも1つは、特定のUE能力(UE capability)を報告した又は当該特定のUE能力をサポートするUEに対してのみ適用されてもよい。
・SFN PDCCH繰り返しスキームをサポートするか否か、
・FDM PDCCH繰り返しスキームをサポートするか否か、
・CSSセットのためのSFN PDCCH繰り返しスキームをサポートするか否か、
・CSSセットのためのFDM PDCCH繰り返しスキームをサポートするか否か、
・2つ以上の異なるQCLタイプDのPDCCHの同時受信をサポートするか否か。
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15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16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)
- 時間的に重複する複数の制御リソースセット(Control Resource Set(CORESET))における下りリンク制御チャネル(Physical Downlink Control Channel(PDCCH))のうち、モニタするPDCCHを、2つの送信設定指示状態(Transmission Configuration Indication state(TCI状態))がアクティベートされるCORESETに基づいて決定する制御部と、
前記決定されたPDCCHをモニタする受信部と、を有する端末。 - 前記制御部は、前記複数のCORESETのうち、共通サーチスペース(Common Search Space(CSS))セットに対応するCORESETを、UE固有サーチスペース(UE-specific Search Space(USS))セットに対応するCORESETより優先的にモニタするように、前記モニタするPDCCHを決定する請求項1に記載の端末。
- 前記制御部は、前記複数のCORESETのうち、2つのアクティブTCI状態を有する共通サーチスペース(Common Search Space(CSS))セットに対応するCORESET、2つのアクティブTCI状態を有するUE固有サーチスペース(UE-specific Search Space(USS))セットに対応するCORESET、1つのアクティブTCI状態を有するCSSセットに対応するCORESET、1つのアクティブTCI状態を有するUSSセットに対応するCORESET、の順で優先的にモニタするように、前記モニタするPDCCHを決定する請求項1に記載の端末。
- 前記制御部は、前記複数のCORESETのうち、2つのアクティブTCI状態を有する共通サーチスペース(Common Search Space(CSS))セットに対応するCORESET、1つのアクティブTCI状態を有するCSSセットに対応するCORESET、2つのアクティブTCI状態を有するUE固有サーチスペース(UE-specific Search Space(USS))セットに対応するCORESET、1つのアクティブTCI状態を有するUSSセットに対応するCORESET、の順で優先的にモニタするように、前記モニタするPDCCHを決定する請求項1に記載の端末。
- 時間的に重複する複数の制御リソースセット(Control Resource Set(CORESET))における下りリンク制御チャネル(Physical Downlink Control Channel(PDCCH))のうち、モニタするPDCCHを、2つの送信設定指示状態(Transmission Configuration Indication state(TCI状態))がアクティベートされるCORESETに基づいて決定するステップと、
前記決定されたPDCCHをモニタするステップと、を有する端末の無線通信方法。 - 時間的に重複する複数の制御リソースセット(Control Resource Set(CORESET))における下りリンク制御チャネル(Physical Downlink Control Channel(PDCCH))の少なくとも1つを端末に送信する送信部と、
前記端末が、モニタするPDCCHを、2つの送信設定指示状態(Transmission Configuration Indication state(TCI状態))がアクティベートされるCORESETに基づいて決定する制御を行うと想定する制御部と、を有する基地局。
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| JP2022574969A JP7526822B2 (ja) | 2021-01-14 | 2021-01-14 | 端末、無線通信方法、基地局及びシステム |
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