WO2022168876A1 - 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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- WO2022168876A1 WO2022168876A1 PCT/JP2022/004067 JP2022004067W WO2022168876A1 WO 2022168876 A1 WO2022168876 A1 WO 2022168876A1 JP 2022004067 W JP2022004067 W JP 2022004067W WO 2022168876 A1 WO2022168876 A1 WO 2022168876A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
- H04W36/085—Reselecting an access point involving beams of access points
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Definitions
- the present disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
- LTE Long Term Evolution
- 3GPP Rel. 10-14 LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- LTE successor systems for example, 5th generation mobile communication system (5G), 5G+ (plus), 6th generation mobile communication system (6G), New Radio (NR), 3GPP Rel. 15 and later
- 5G 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- Layer1/Layer2 (L1/L2) to facilitate more efficient (lower delay and overhead) DL/UL beam management in future wireless communication systems (e.g. NR) Inter-cell mobility is being considered.
- L1/L2 inter-cell mobility it is possible to change the serving cell using functions such as beam control without reconfiguring Radio Resource Control (RRC). In other words, it is possible to transmit to and receive from non-serving cells without handover.
- RRC Radio Resource Control
- L1/L2 inter-cell mobility that does not require handover is preferable because there is a period during which data communication is not possible, such as the need for RRC reconnection for handover.
- the Cell Radio Network Temporary Identifier (C-RNTI) used in the serving cell cannot be used as is for transmission and reception with non-serving cells.
- the C-RNTI used in the serving cell may already be used for another user terminal (user equipment (UE)) in a non-serving cell. If the same C-RNTI is used between UEs in the same cell, problems such as erroneously reading downlink control information addressed to other UEs will occur.
- one of the purposes of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can properly transmit and receive non-serving cells.
- a terminal includes a transmission unit that transmits information about a plurality of Cell Radio Network Temporary Identifiers (C-RNTIs), and controls transmission and reception using the plurality of C-RNTIs. and a control unit for performing
- transmission and reception of non-serving cells can be performed appropriately.
- FIG. 1A-1D are diagrams illustrating an example of a multi-TRP scenario.
- FIG. 2A is a diagram showing an example of the intracell TRP.
- FIG. 2B is a diagram showing an example of inter-TRP.
- 3A and 3B are diagrams illustrating an example of RRC configuration of association between QCL source RSs and non-serving cell RSs.
- FIG. 4 is a diagram illustrating an example of a schematic configuration of a radio communication system according to an embodiment.
- FIG. 5 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- FIG. 6 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
- FIG. 7 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
- TCI Transmission Configuration Indication state
- Controlling processing eg, reception, demapping, demodulation, and/or decoding
- transmission processing eg, transmission, mapping, precoding, modulation, and/or encoding
- the TCI state may represent those that apply to downlink signals/channels.
- the equivalent of TCI conditions applied to uplink signals/channels may be expressed as spatial relations.
- the TCI state is information about the pseudo-colocation (QCL) of signals/channels, and may be called spatial reception parameters, spatial relation information, or the like.
- the TCI state may be set in the UE on a channel-by-channel or signal-by-signal basis.
- QCL is an index that indicates the statistical properties of a signal/channel. For example, when one signal/channel and another signal/channel have a QCL relationship, Doppler shift, Doppler spread, average delay ), delay spread, spatial parameters (e.g., spatial Rx parameter) are identical (QCL with respect to at least one of these). You may
- the spatial reception parameters may correspond to the reception beams of the UE (eg, reception analog beams), and the beams may be specified based on the spatial QCL.
- QCL or at least one element of QCL in the present disclosure may be read as sQCL (spatial QCL).
- QCL types A plurality of types (QCL types) may be defined for the QCL.
- QCL types AD may be provided with different parameters (or parameter sets) that can be assumed to be the same, and the parameters (which may be referred to as QCL parameters) are shown below:
- QCL type A QCL-A
- QCL type B QCL-B
- QCL type C QCL-C
- QCL-D Spatial reception parameters.
- the UE cannot assume that a given Control Resource Set (CORESET), channel or reference signal is in a specific QCL (e.g. QCL type D) relationship with another CORESET, channel or reference signal. , may be called the QCL assumption.
- CORESET Control Resource Set
- QCL QCL type D
- a UE may determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) for a signal/channel based on the TCI conditions or QCL assumptions of that signal/channel.
- Tx beam transmit beam
- Rx beam receive beam
- the TCI state may be, for example, information about the QCL between the channel of interest (in other words, the reference signal (RS) for the channel) and another signal (for example, another RS). .
- the TCI state may be set (indicated) by higher layer signaling, physical layer signaling or a combination thereof.
- higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- Broadcast information includes, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and other system information ( It may be Other System Information (OSI).
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- OSI System Information
- the physical layer signaling may be, for example, downlink control information (DCI).
- DCI downlink control information
- Channels for which TCI states or spatial relationships are set are, for example, Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel It may be at least one of a channel (PUSCH)) and an uplink control channel (Physical Uplink Control Channel (PUCCH)).
- PDSCH Physical Downlink Shared Channel
- PDCCH Physical Uplink Control Channel
- RSs that have a QCL relationship with the channel are, for example, a synchronization signal block (SSB), a channel state information reference signal (CSI-RS), a measurement reference signal (Sounding It may be at least one of a reference signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).
- SSB synchronization signal block
- CSI-RS channel state information reference signal
- Sounding It may be at least one of a reference signal (SRS)), a tracking CSI-RS (also called a tracking reference signal (TRS)), and a QCL detection reference signal (also called QRS).
- SRS reference signal
- TRS tracking reference signal
- QRS QCL detection reference signal
- An SSB is a signal block that includes at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- PBCH Physical Broadcast Channel
- An SSB may also be called an SS/PBCH block.
- the TCI state information element (“TCI-state IE" of RRC) set by higher layer signaling may contain one or more pieces of QCL information ("QCL-Info").
- the QCL information may include at least one of information (RS related information) regarding RSs that are QCL related and information indicating the QCL type (QCL type information).
- the RS related information includes the index of the RS (eg, SSB index, Non-Zero-Power (NZP) CSI-RS resource ID (Identifier)), the index of the cell in which the RS is located, and the location of the RS. It may contain information such as the Bandwidth Part (BWP) index.
- BWP Bandwidth Part
- both QCL type A RS and QCL type D RS or only QCL type A RS can be configured for the UE as at least one TCI state of PDCCH and PDSCH.
- a TRS When a TRS is set as a QCL type A RS, the TRS is different from the PDCCH or PDSCH demodulation reference signal (DeModulation Reference Signal (DMRS)), and it is assumed that the same TRS will be transmitted periodically over a long period of time. be done.
- DMRS DeModulation Reference Signal
- the UE can measure the TRS and calculate the average delay, delay spread, etc.
- a UE configured with the TRS as a QCL type A RS in a PDCCH or PDSCH DMRS TCI state has the same QCL type A parameters (average delay, delay spread, etc.) of the PDCCH or PDSCH DMRS and the TRS. Therefore, the DMRS type A parameters (average delay, delay spread, etc.) of the PDCCH or PDSCH can be obtained from the TRS measurement results.
- the UE can use the TRS measurement result to perform more accurate channel estimation.
- a UE configured with a QCL type D RS can use the QCL type D RS to determine the UE receive beam (spatial domain receive filter, UE spatial domain receive filter).
- a QCL type X RS in a TCI state may mean an RS that has a QCL type X relationship with (the DMRS of) a certain channel/signal, and this RS is called a QCL type X QCL source in that TCI state.
- Multi-TRP In NR, one or more transmission/reception points (TRP) (multi-TRP) uses one or more panels (multi-panel) to perform DL transmission to the UE. It is It is also being considered for UEs to perform UL transmissions on one or more TRPs.
- TRP transmission/reception points
- a plurality of TRPs may correspond to the same cell identifier (cell identifier (ID)) or may correspond to different cell IDs.
- the cell ID may be a physical cell ID (Physical Cell ID (PCID, PCI)) or a virtual cell ID.
- FIGS 1A-1D are diagrams showing an example of a multi-TRP scenario.
- each TRP is assumed to be capable of transmitting four different beams, but is not limited to this.
- FIG. 1A shows an example of a case (which may also be called single mode, single TRP, etc.) in which only one TRP (TRP1 in this example) of multi-TRPs transmits to the UE.
- TRP1 transmits both control signals (PDCCH) and data signals (PDSCH) to the UE.
- PDCCH control signals
- PDSCH data signals
- FIG. 1B shows a case where only one TRP (TRP1 in this example) of the multi-TRPs transmits control signals to the UE, and the multi-TRP transmits data signals (may be called single master mode).
- TRP1 TRP1 in this example
- DCI downlink control information
- FIG. 1C shows an example of a case (which may be called a master-slave mode) in which each of the multi-TRPs transmits part of the control signal to the UE and the multi-TRP transmits the data signal.
- Part 1 of the control signal (DCI) may be transmitted in TRP1
- part 2 of the control signal (DCI) may be transmitted in TRP2.
- Part two of the control signal may depend on part one.
- the UE receives each PDSCH transmitted from the multi-TRP based on these DCI parts.
- FIG. 1D shows an example of a case (which may be called multi-master mode) in which each of the multi-TRPs transmits separate control signals to the UE and the multi-TRPs transmit data signals.
- a first control signal (DCI) may be transmitted in TRP1
- a second control signal (DCI) may be transmitted in TRP2.
- the UE receives each PDSCH transmitted from the multi-TRP based on these DCIs.
- the DCI is called a single DCI (single PDCCH).
- single PDCCH single PDCCH
- multiple PDSCHs from multiple TRPs as shown in FIG. 1D are each scheduled using multiple DCIs, these multiple DCIs may be referred to as multiple DCIs (multiple PDCCHs (multiple PDCCHs)).
- a different code word (CW) and a different layer may be transmitted from each TRP of the multi-TRP.
- NJT non-coherent joint transmission
- TRP1 modulate-maps the first codeword and layer-maps the first number of layers (eg, 2 layers) with the first precoding to transmit the first PDSCH.
- TRP2 also modulates and layer-maps the second codeword to transmit a second PDSCH with a second number of layers (eg, 2 layers) with a second precoding.
- multiple PDSCHs to be NCJTed may be defined as partially or completely overlapping in at least one of the time and frequency domains. That is, the first PDSCH from the first TRP and the second PDSCH from the second TRP may overlap at least one of time and frequency resources.
- first PDSCH and second PDSCH are not quasi-co-located (QCL). Reception of multiple PDSCHs may be translated as simultaneous reception of PDSCHs that are not of a given QCL type (eg, QCL type D).
- PDSCH transport block (TB) or codeword (CW) repetition across multi-TRPs.
- repetition schemes URLLC schemes, eg schemes 1, 2a, 2b, 3, 4
- SDM space division multiplexed
- FDM frequency division multiplexed
- RV redundancy version
- the RVs may be the same or different for the multi-TRPs.
- multiple PDSCHs from multiple TRPs are time division multiplexed (TDM).
- TDM time division multiplexed
- multiple PDSCHs from multiple TRPs are transmitted within one slot.
- multiple PDSCHs from multiple TRPs are transmitted in different slots.
- a configuration in which the same physical cell ID is set for multiple TRPs (intra-TRP mobility, intra-cell TRP mobility, intra-cell mobility, or cell multi-TRP operation) and a configuration in which different physical cell IDs are set for multiple TRPs (inter-TRP mobility, inter-cell TRP mobility, inter-cell mobility , or inter-cell multi-TRP operation).
- FIG. 2A is a diagram showing an example of intra-cell mobility.
- the same physical cell ID (PCI1) is set for TRP1 and TRP2.
- the SSB (SSBindex) transmitted by TRP1 and the SSB transmitted by TRP2 must be different.
- the SSB of TRP1 is 0-31 and the SSB of TRP2 is 32-63.
- FIG. 2B is a diagram showing an example of inter-cell mobility.
- different physical cell IDs PCI1, PCI2
- the SSB transmitted by TRP1 and the SSB transmitted by TRP2 may overlap or may be different.
- the SSBs of TRP1 and TRP2 may both be 0-63.
- the SSB of TRP1 may be 0-31 and the SSB of TRP2 may be 32-63.
- the RS in the TCI state of PDSCH1/PDSCH2 is PCI1 or PCI2.
- Intra-cell mobility and inter-cell mobility are not limited to multi-TRP configurations.
- Layer1/layer2 (L1/L2) inter-cell mobility is being considered to facilitate more efficient (lower delay and overhead) DL/UL beam management.
- QCL/TCI related enhancements may be made to enable inter-cell multi-TRP operation, assuming multi-DCI based multi-PDSCH reception.
- L1/L2 inter-cell mobility it is possible to change the serving cell using functions such as beam control without RRC reconfiguration. In other words, it is possible to transmit to and receive from non-serving cells without handover.
- L1/L2 inter-cell mobility that does not require handover is preferable because there is a period during which data communication is not possible, such as the need for RRC reconnection for handover.
- the C-RNTI used in the serving cell cannot be used as is for transmission/reception with non-serving cells.
- the C-RNTI used in the serving cell may already be used for another UE in the non-serving cell. If the same C-RNTI is used between UEs in the same cell, for example, DCI addressed to someone else can be read by mistake (Cyclic Redundancy Check (CRC) scramble of DCI addressed to someone else is erroneously solved. ) and other problems arise.
- CRC Cyclic Redundancy Check
- the inventors came up with a method for properly performing transmission and reception of non-serving cells. According to one aspect of the present disclosure, for example, fast inter-cell mobility can be achieved.
- A/B may be read as “at least one of A and B”.
- panel Uplink (UL) transmitting entity, point, TRP, TRP-ID, TRP ID, spatial relationship, control resource set (COntrol Resource SET (CORESET)), PDSCH, codeword, base station, predetermined antenna port (e.g. demodulation reference signal (DMRS) port), predetermined antenna port group (e.g. DMRS port group), predetermined group (e.g. Code Division Multiplexing (CDM) ) group, predetermined reference signal group, CORESET group), and CORESET pool may be read interchangeably. Also, panel identifier (ID) and panel may be read interchangeably.
- DMRS demodulation reference signal
- CDM Code Division Multiplexing
- cells, CCs, carriers, BWPs, and bands may be read interchangeably.
- indexes, IDs, indicators, and resource IDs may be read interchangeably.
- TCI state, TCI state or QCL assumption, QCL assumption, QCL information, QCL parameters, spatial domain receive filter, UE spatial domain receive filter, spatial domain filter, UE receive beam, DL receive beam, DL precoding, DL precoder, DL- RS, TCI-state or QCL-assumed QCL type D RS, and TCI-state or QCL-assumed QCL type A RS may be read interchangeably.
- QCL type D RS, DL-RS associated with QCL type D, DL-RS with QCL type D, source of DL-RS, SSB, CSI-RS may be read interchangeably.
- the TCI state is information (eg, DL-RS, QCL type, cell in which the DL-RS is transmitted, etc.) about the receive beam (spatial domain receive filter) indicated (configured) for the UE.
- the QCL assumption is based on the transmission or reception of the associated signal (eg PRACH) and information about the receive beam (spatial domain receive filter) assumed by the UE (eg DL-RS, QCL type, DL-RS transmitted (such as a cell that is
- spatial relationships, spatial relationship information, spatial relationship assumptions, QCL parameters, spatial domain transmit filters, UE spatial domain transmit filters, spatial domain filters, UE transmit beams, UL transmit beams, UL precoding, UL precoders, spatial relationships RS, DL-RS, QCL assumption, SRI, spatial relationship based on SRI, UL TCI, may be read interchangeably.
- TRS, CSI-RS for tracking, CSI-RS with TRS information (higher layer parameter trs-Info), NZP-CSI-RS resources in the NZP-CSI-RS resource set with TRS information are mutually It may be reread.
- normal TRP single TRP, single TRP system, single TRP transmission, and single PDSCH
- multi-TRP multi-TRP system, multi-TRP transmission, and multi-PDSCH
- a single DCI, a single PDCCH, multiple TRPs based on a single DCI, and activating two TCI states on at least one TCI codepoint may be read interchangeably.
- single TRP channels with single TRP, channels with one TCI state/spatial relationship, multi-TRP not enabled by RRC/DCI, multiple TCI states/spatial relations enabled by RRC/DCI no CORESET Pool Index (CORESETPoolIndex) value of 1 is set for any CORESET, and no codepoint in the TCI field is mapped to two TCI states;
- CORESETPoolIndex CORESET Pool Index
- multi-TRP channels with multi-TRP, channels with multiple TCI state/spatial relationships, multi-TRP enabled by RRC/DCI, multiple TCI state/spatial relationships enabled by RRC/DCI and at least one of multi-TRP based on a single DCI and multi-TRP based on multiple DCIs
- multi-TRPs based on multi-DCI setting a CORESET pool index (CORESETPoolIndex) value of 1 for a CORESET, may be read interchangeably.
- multiple TRPs based on a single DCI, where at least one codepoint of a TCI field is mapped to two TCI states may be read interchangeably.
- a UE uses multiple C-RNTIs for UL/DL transmission and reception.
- UL/DL transmission/reception and “transmission/reception to/from cell” in this disclosure refer to transmission of any UL channel/signal (e.g., RS), reception of any DL channel/signal (e.g., RS), Transmitting any UL channel/signal (eg, RS), receiving any DL channel/signal (eg, RS) in the cell, etc. may be interchanged.
- UL channel/signal e.g., RS
- reception of any DL channel/signal e.g., RS
- Transmitting any UL channel/signal eg, RS
- receiving any DL channel/signal eg, RS
- using C-RNTI detect PDCCH using C-RNTI (blind detection), C - Decoding of the PDSCH using the -RNTI, scrambling for the PUCCH/PUSCH using the C-RNTI, etc.
- C-RNTI is used for scrambling of CRC of PDCCH (DCI), scrambling of data (information bits) of PDSCH/PUCCH/PUSCH, and the like.
- the UE holds the C-RNTI of the non-serving cell (eg, the second C-RNTI) in addition to the C-RNTI of the serving cell (eg, the first C-RNTI).
- the UE uses the former to control transmission and reception with the serving cell and the latter to control transmission and reception with non-serving cells.
- How many non-serving cells the UE assumes may be determined in advance by the specifications, or may be defined in higher layers. It may be set in the UE by signaling (eg, RRC/MAC CE), or may be determined based on the UE capabilities.
- the UE may hold/assume the C-RNTI of the number of non-serving cells specified/configured/assumed/determined in addition to the C-RNTI of the serving cell.
- the UE may use the C-RNTI of the non-serving cell for transmission/reception with the non-serving cell (eg, at least physical layer transmission/reception (PDCCH detection, PDSCH data descrambling, etc.)).
- the non-serving cell eg, at least physical layer transmission/reception (PDCCH detection, PDSCH data descrambling, etc.)
- C-RNTI for non-serving cell "C-RNTI for non-serving cell”
- C-RNTI for non-serving cell "additional C-RNTI for non-serving cell”
- additional C-RNTI etc.
- the UE may use MAC CE to signal the C-RNTI for non-serving cells to the network (eg, base station).
- This MAC CE is Rel. It may be a different MAC CE than the C-RNTI MAC CE already specified in 15/16.
- the C-RNTI MAC CE is the MAC CE transmitted from the UE in message 3 in the Contention Based Random Access (CBRA) procedure.
- the C-RNTI notified from the UE to the base station using the C-RNTI MAC CE (at this point, it is also called TC-RNTI (Temporary C-RNTI)), after contention resolution, the UE officially become a C-RNTI for the CBRA procedure.
- TC-RNTI Temporary C-RNTI
- This MAC CE may include a C-RNTI field of a certain number (eg, 16) bits indicating the C-RNTI (eg, the C-RNTI of the MAC entity).
- This MAC CE may also include a cell ID field that indicates the cell ID (for example, PCID (physical cell ID)) of the target non-serving cell.
- this MAC CE may be associated with the same Logical Channel ID (LCID) as the existing C-RNTI MAC CE, or may be associated with a different LCID.
- LCID Logical Channel ID
- the UE may be configured with C-RNTI candidates of non-serving cells in advance by RRC signaling.
- the C-RNTI field may indicate one or more C-RNTIs among the candidates (for example, it may indicate the index value indicating the number of entries in the candidates).
- the UE can notify the C-RNTI of the non-serving cell (neighboring cell, neighbor cell) without RRC reconfiguration.
- Another additional C-RNTI reporting method is that the UE determines the additional C-RNTI and sends the determined additional C-RNTI information to the network. This transmission may be performed using at least one of PUSCH, message 3 PUSCH, PUCCH, and the like. Additional C-RNTI information may be transmitted using at least one of MAC CE, UCI, and the like. At this point, the additional C-RNTI may be referred to as the additional TC-RNTI.
- the UE may randomly determine the additional C-RNTI or based on at least one of the serving cell's C-RNTI and the non-serving cell's cell ID.
- Additional C-RNTI information is transmitted using a MAC CE that extends/changes the existing C-RNTI MAC CE (for example, it may be called an enhanced C-RNTI MAC CE) may be
- the extended C-RNTI MAC CE may include fields for additional C-RNTIs in addition to the fields for the serving cell's C-RNTI.
- the UE may confirm the additional TC-RNTI as the additional C-RNTI upon receiving a response from the base station.
- the response may be a response to a transmission including the additional C-RNTI information (eg, message 4, DCI, HARQ-ACK, PDSCH), and the like.
- Non-serving cell transmission/reception may mean that the QCL assumption/TCI condition for the channel/signal to be transmitted/received is associated with the non-serving cell's RS (eg, SSB/CSI-RS).
- RS eg, SSB/CSI-RS
- the PDSCH of the non-serving cell is the PDSCH resource configured by the PDSCH configuration (“PDSCH-config”) configured in the RRC parameters for a certain serving cell (eg, “ServingCellConfig” indicating the configuration of the serving cell). . 15/16 Scheduled as in the NR specification, but may imply that the QCL source for this PDSCH is associated with (is set to) a non-serving cell.
- channels/RS e.g., PDCCH, PDSCH, CSI-RS, TRS, PUCCH, PUSCH, SRS
- the UE shall It may be assumed that an additional C-RNTI is used to transmit and receive.
- the PDSCH TCI state was sometimes not explicitly specified. For example, if the RRC parameter (“tciPresentInDCI”) indicating that the TCI field is included in the DCI is not configured, the UE can derive the TCI status of the PDSCH from the TCI status of the PDCCH.
- tciPresentInDCI the RRC parameter
- the UE may then transmit and receive the PDSCH using the additional C-RNTI for non-serving cells if the TCI status of the PDCCH is associated with the non-serving cell RS.
- the UE uses an additional C-RNTI for the non-serving cell to transmit and receive that PDSCH/PUSCH. may be implemented.
- Rel. 17 will introduce a unified TCI (common TCI) state framework. If the combined TCI state QCL source RS indicated by MAC CE/DCI is associated with a non-serving cell RS, the UE uses an additional C-RNTI for the non-serving cell to channel/RS (e.g., PDCCH, PDSCH, CSI-RS, TRS, PUCCH, PUSCH, SRS) may be transmitted and received.
- channel/RS e.g., PDCCH, PDSCH, CSI-RS, TRS, PUCCH, PUSCH, SRS
- the association between QCL source RSs and non-serving cell RSs may be configured in the UE by higher layer signaling.
- the UE by RRC signaling, for the TCI state (or QCL source RS in the TCI state), at least one of information and PCI whether it corresponds to the non-serving cell (RS) may be explicitly configured,
- the PCI may correspond to the PCI of a non-serving cell. This information as to whether a cell corresponds to a non-serving cell may be called a non-serving cell flag, a serving cell flag, a cell flag, or the like.
- FIGS. 3A and 3B are diagrams illustrating an example of RRC configuration of association between QCL source RSs and non-serving cell RSs.
- FIG. 3A shows that for TCI state #1, TRS #1 is set as the source RS of QCL types A and D, and the PCI value corresponding to this TCI state (or TRS #1) is "358".
- the PCI may be represented by a certain number of bits (eg, 10 bits).
- TRS #1 is set as the source RS of QCL types A and D, and this TCI state (or TRS #1) is set to “01” as the non-serving cell flag. example.
- the non-serving cell flag may be represented by, for example, 2 bits.
- reporting the non-serving cell flag as shown in FIG. 3B can reduce the number of bits required for reporting non-serving cells compared to the case of reporting PCI as shown in FIG. 3A.
- the cell ID (PCI) of the serving cell/non-serving cell corresponding to the non-serving cell flag may be separately notified to the UE by RRC/MAC CE or the like.
- the number of bits of the non-serving cell flag may be predefined by the specification (for example, 1 bit), may be set by a higher layer, or may be set by the above-described serving cell/non-serving cell cell ID (PCI). It may be determined based on numbers.
- the number of additional C-RNTIs for the non-serving cell may be determined based on at least one of the number of bits of the non-serving cell flag, cell ID (PCI) of the serving cell/non-serving cell, and the like. For example, if the non-serving cell flag is 1 bit, the additional C-RNTI for the non-serving cell is 1, and if the non-serving cell flag is 2 bits, the additional C-RNTI for the non-serving cell is 3. may be
- transmission and reception of non-serving cells can be appropriately performed based on the additional C-RNTI.
- RSs of non-serving cells can be applied as QCL sources. For example, even if the serving cell is changed due to inter-cell mobility, the RS of the non-serving cell can be applied as is to determine the TCI state.
- the specific UE capabilities may indicate at least one of the following: whether to support multiple C-RNTIs (additional C-RNTIs); whether to support transmission and reception with non-serving cells; whether to support QCL assumption/TCI state for non-serving cell RSs; • Whether to support PCI configuration/use of non-serving cells.
- At least one of the above embodiments may be applied if the UE is configured by higher layer signaling with specific information related to the above embodiments (if not configured, e.g. Rel. 15/ 16 operations apply).
- the specific information may be information to set the QCL assumption/TCI state of the non-serving cell RS, any RRC parameters for a specific release (eg Rel. 17), etc.
- C-RNTI in the present disclosure may be read as any identifier (eg, another RNTI).
- wireless communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
- communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.
- FIG. 4 is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.
- the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .
- LTE Long Term Evolution
- 5G NR 5th generation mobile communication system New Radio
- 3GPP Third Generation Partnership Project
- the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- RATs Radio Access Technologies
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
- RATs Radio Access Technologies
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
- LTE Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC NR-E -UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
- the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB) )) may be supported.
- dual connectivity NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB)
- gNB NR base stations
- a wireless communication system 1 includes a base station 11 forming a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. You may prepare.
- a user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminals 20 are not limited to the embodiment shown in the figure.
- the base stations 11 and 12 are collectively referred to as the base station 10 when not distinguished.
- the user terminal 20 may connect to at least one of the multiple base stations 10 .
- the user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
- CA carrier aggregation
- CC component carriers
- DC dual connectivity
- Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
- Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2.
- FR1 may be a frequency band below 6 GHz (sub-6 GHz)
- FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
- the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- a plurality of base stations 10 may be connected by wire (for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, an optical fiber conforming to Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between the base stations 11 and 12, the base station 11 corresponding to the upper station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to the relay station (relay) is an IAB Also called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 directly or via another base station 10 .
- the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal compatible with at least one of communication schemes such as LTE, LTE-A, and 5G.
- a radio access scheme based on orthogonal frequency division multiplexing may be used.
- OFDM orthogonal frequency division multiplexing
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a radio access method may be called a waveform.
- other radio access schemes for example, other single-carrier transmission schemes and other multi-carrier transmission schemes
- the UL and DL radio access schemes may be used as the UL and DL radio access schemes.
- a downlink shared channel Physical Downlink Shared Channel (PDSCH)
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- an uplink shared channel (PUSCH) shared by each user terminal 20 an uplink control channel (PUCCH), a random access channel (Physical Random Access Channel (PRACH)) or the like may be used.
- PUSCH uplink shared channel
- PUCCH uplink control channel
- PRACH Physical Random Access Channel
- User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH.
- User data, higher layer control information, and the like may be transmitted by PUSCH.
- a Master Information Block (MIB) may be transmitted by the PBCH.
- Lower layer control information may be transmitted by the PDCCH.
- the lower layer control information may include, for example, downlink control information (DCI) including scheduling information for at least one of PDSCH and PUSCH.
- DCI downlink control information
- the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
- the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
- PDSCH may be replaced with DL data
- PUSCH may be replaced with UL data.
- a control resource set (CControl Resource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
- CORESET corresponds to a resource searching for DCI.
- the search space corresponds to the search area and search method of PDCCH candidates.
- a CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with certain search spaces based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set. Note that “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. in the present disclosure may be read interchangeably.
- PUCCH channel state information
- acknowledgment information for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
- SR scheduling request
- a random access preamble for connection establishment with a cell may be transmitted by the PRACH.
- downlink, uplink, etc. may be expressed without adding "link”.
- various channels may be expressed without adding "Physical" to the head.
- synchronization signals SS
- downlink reference signals DL-RS
- the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), Positioning Reference Signal (PRS)), Phase Tracking Reference Signal (PTRS)), etc.
- CRS cell-specific reference signal
- CSI-RS channel state information reference signal
- DMRS Demodulation reference signal
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS Block (SSB), and so on.
- SS, SSB, etc. may also be referred to as reference signals.
- DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal).
- FIG. 5 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
- the base station 10 includes a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 .
- One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140 may be provided.
- this example mainly shows the functional blocks that characterize the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 110 controls the base station 10 as a whole.
- the control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like.
- the control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission line interface 140 .
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 .
- the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
- the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
- the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
- the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.
- the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
- the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measuring section 123 .
- the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
- the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control for example, HARQ retransmission control
- the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.
- channel coding which may include error correction coding
- modulation modulation
- mapping mapping
- filtering filtering
- DFT discrete Fourier transform
- DFT discrete Fourier transform
- the transmitting/receiving unit 120 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .
- the transmitting/receiving unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
- the transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.
- FFT Fast Fourier transform
- IDFT Inverse Discrete Fourier transform
- the transmitting/receiving unit 120 may measure the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
- the measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured.
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- RSSI Received Signal Strength Indicator
- channel information for example, CSI
- the transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.
- the transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission line interface 140.
- the transmitting/receiving unit 120 may receive information regarding a plurality of Cell Radio Network Temporary Identifiers (C-RNTIs). Also, the control unit 110 may control transmission and reception using at least one of the plurality of C-RNTIs.
- C-RNTIs Cell Radio Network Temporary Identifiers
- FIG. 6 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
- the user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 .
- One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
- this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
- the control unit 210 controls the user terminal 20 as a whole.
- the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission/reception, measurement, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 .
- the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission/reception unit 220 .
- the transmitting/receiving section 220 may include a baseband section 221 , an RF section 222 and a measurement section 223 .
- the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212 .
- the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure.
- the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
- the transmission section may be composed of a transmission processing section 2211 and an RF section 222 .
- the receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .
- the transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
- the transmitting/receiving unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmitting/receiving unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
- the transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
- digital beamforming eg, precoding
- analog beamforming eg, phase rotation
- the transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- RLC layer processing for example, RLC retransmission control
- MAC layer processing for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control
- the transmitting/receiving unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
- Whether or not to apply DFT processing may be based on transform precoding settings. Transmitting/receiving unit 220 (transmission processing unit 2211), for a certain channel (for example, PUSCH), if transform precoding is enabled, the above to transmit the channel using the DFT-s-OFDM waveform
- the DFT process may be performed as the transmission process, or otherwise the DFT process may not be performed as the transmission process.
- the transmitting/receiving unit 220 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 230. .
- the transmitting/receiving section 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.
- the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmitting/receiving section 220 may measure the received signal.
- the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
- the measuring unit 223 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, SNR), signal strength (eg, RSSI), channel information (eg, CSI), and the like.
- the measurement result may be output to control section 210 .
- the transmitter and receiver of the user terminal 20 in the present disclosure may be configured by at least one of the transmitter/receiver 220 and the transmitter/receiver antenna 230 .
- the transmitting/receiving unit 220 may transmit information regarding a plurality of Cell Radio Network Temporary Identifiers (C-RNTIs). Also, the control unit 210 may control transmission and reception using (each of) the plurality of C-RNTIs.
- C-RNTIs Cell Radio Network Temporary Identifiers
- the transmitting unit 220 may transmit information about C-RNTI for non-serving cells using Medium Access Control Control Element (MAC CE).
- MAC CE Medium Access Control Control Element
- the control unit 210 may be set with information as to whether it corresponds to a non-serving cell in relation to the transmission configuration indication state (TCI state).
- TCI state transmission configuration indication state
- the control unit 210 may set a physical cell identifier (PCI) corresponding to the non-serving cell in relation to the transmission configuration indication state (TCI state).
- PCI physical cell identifier
- each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
- a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 7 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
- the base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
- processor 1001 may be implemented by one or more chips.
- predetermined software program
- the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .
- the processor 1001 operates an operating system and controls the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
- CPU central processing unit
- control unit 110 210
- transmission/reception unit 120 220
- FIG. 10 FIG. 10
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
- the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
- the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.
- a computer-readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include
- the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- a signal may also be a message.
- a reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc. according to an applied standard.
- a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may consist of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) that make up a radio frame may be called a subframe.
- a subframe may consist of one or more slots in the time domain.
- a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
- a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
- Numerology for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may also be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
- one subframe may be called a TTI
- a plurality of consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
- a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
- the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
- the short TTI e.g., shortened TTI, etc.
- a TTI having the above TTI length may be read instead.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
- the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
- the number of subcarriers included in an RB may be determined based on neumerology.
- an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long.
- One TTI, one subframe, etc. may each be configured with one or more resource blocks.
- One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.
- PRB Physical Resource Block
- SCG Sub-Carrier Group
- REG Resource Element Group
- PRB pair RB Also called a pair.
- a resource block may be composed of one or more resource elements (Resource Element (RE)).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP for UL
- BWP for DL DL BWP
- One or multiple BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
- the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
- information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
- Information, signals, etc. may be input and output through multiple network nodes.
- Input/output information, signals, etc. may be stored in a specific location (for example, memory), or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.
- Uplink Control Information (UCI) Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
- RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
- MAC signaling may be notified using, for example, a MAC Control Element (CE).
- CE MAC Control Element
- notification of predetermined information is not limited to explicit notification, but implicit notification (for example, by not notifying the predetermined information or by providing another information (by notice of
- the determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) , a server, or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.
- a “network” may refer to devices (eg, base stations) included in a network.
- precoding "precoding weight”
- QCL Quality of Co-Location
- TCI state Transmission Configuration Indication state
- spatialal patial relation
- spatialal domain filter "transmission power”
- phase rotation "antenna port
- antenna port group "layer”
- number of layers Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable. can be used as intended.
- base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
- a base station can accommodate one or more (eg, three) cells.
- the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is assigned to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head (RRH))) may also provide communication services.
- a base station subsystem e.g., a small indoor base station (Remote Radio)). Head (RRH)
- RRH Head
- the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.
- MS Mobile Station
- UE User Equipment
- Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , a handset, a user agent, a mobile client, a client, or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
- the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a user terminal.
- communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- each aspect/embodiment of the present disclosure may be applied.
- the user terminal 20 may have the functions of the base station 10 described above.
- words such as "uplink” and "downlink” may be replaced with words corresponding to communication between terminals (for example, "sidelink”).
- uplink channels, downlink channels, etc. may be read as sidelink channels.
- user terminals in the present disclosure may be read as base stations.
- the base station 10 may have the functions of the user terminal 20 described above.
- operations that are assumed to be performed by the base station may be performed by its upper node in some cases.
- various operations performed for communication with a terminal may involve the base station, one or more network nodes other than the base station (e.g., Clearly, this can be done by a Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG xG (xG (x is, for example, an integer or a decimal number)
- Future Radio Access FAA
- RAT New - Radio Access Technology
- NR New Radio
- NX New radio access
- FX Future generation radio access
- GSM registered trademark
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi®
- IEEE 802.16 WiMAX®
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, or other suitable wireless It may be applied to systems using communication methods, next-generation systems extended based on these, and the like. Also, multiple systems may be applied to systems using communication methods, next-generation systems extended based on these, and the like
- determining includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be “determining.”
- determining (deciding) includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.
- determining is considered to be “determining” resolving, selecting, choosing, establishing, comparing, etc. good too. That is, “determine (determine)” may be regarded as “determining (determining)” some action.
- connection refers to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- radio frequency domain when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
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Abstract
Description
NRでは、送信設定指示状態(Transmission Configuration Indication state(TCI状態))に基づいて、信号及びチャネルの少なくとも一方(信号/チャネルと表現する)のユーザ端末(user terminal、User Equipment(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。
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)が、1つ又は複数のパネル(マルチパネル)を用いて、UEに対してDL送信を行うことが検討されている。また、UEが、1つ又は複数のTRPに対してUL送信を行うことが検討されている。
本開示の一実施形態では、UEは、複数のC-RNTIを用いて、UL/DLの送受信を行う。
UEは、MAC CEを用いて、非サービングセル向けのC-RNTIを、ネットワーク(例えば、基地局)に通知してもよい。このMAC CEは、Rel.15/16で既に規定されているC-RNTI MAC CEとは異なるMAC CEであってもよい。
「非サービングセルの送受信」は、送受信するチャネル/信号についてのQCL想定/TCI状態が、非サービングセルのRS(例えば、SSB/CSI-RS)と関連することを意味してもよい。
QCLソースRSと非サービングセルRSとの関連付けは、上位レイヤシグナリングによってUEに設定されてもよい。例えば、UEは、RRCシグナリングによって、TCI状態(又はTCI状態のQCLソースRS)について、非サービングセル(のRS)に該当するかの情報及びPCIの少なくとも一方を明示的に設定されてもよいし、当該PCIは、非サービングセルのPCIに該当してもよい。この、非サービングセルに該当するかの情報は、非サービングセルフラグ、サービングセルフラグ、セルフラグなどと呼ばれてもよい。
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。
・複数のC-RNTI(追加C-RNTI)をサポートするか否か、
・非サービングセルとの送受信をサポートするか否か、
・非サービングセルRSのQCL想定/TCI状態をサポートするか否か、
・非サービングセルのPCIの設定/利用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5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6は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- 複数のセル無線ネットワーク一時識別子(Cell Radio Network Temporary Identifier(C-RNTI))に関する情報を送信する送信部と、
前記複数のC-RNTIを用いる送受信の制御を行う制御部と、を有する端末。 - 前記送信部は、Medium Access Control Control Element(MAC CE)を用いて、非サービングセル向けのC-RNTIに関する情報を送信する請求項1に記載の端末。
- 前記制御部は、送信設定指示状態(Transmission Configuration Indication state(TCI状態))aに関連して、非サービングセルに該当するかの情報を設定される請求項1又は請求項2に記載の端末。
- 前記制御部は、送信設定指示状態(Transmission Configuration Indication state(TCI状態))に関連して、非サービングセルに対応する物理セル識別子を設定される請求項1又は請求項2に記載の端末。
- 複数のセル無線ネットワーク一時識別子(Cell Radio Network Temporary Identifier(C-RNTI))に関する情報を送信するステップと、
前記複数のC-RNTIを用いる送受信の制御を行うステップと、を有する端末の無線通信方法。 - 複数のセル無線ネットワーク一時識別子(Cell Radio Network Temporary Identifier(C-RNTI))に関する情報を受信する受信部と、
前記複数のC-RNTIの少なくとも1つを用いる送受信の制御を行う制御部と、を有する基地局。
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| JP2022579583A JP7763794B2 (ja) | 2021-02-05 | 2022-02-02 | 端末、無線通信方法、基地局及びシステム |
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| US20200154467A1 (en) * | 2017-06-15 | 2020-05-14 | Huawei Technologies Co., Ltd. | Method and Devices for Multiple Transmit Receive Point Cooperation for Reliable Communication |
| WO2020143692A1 (zh) * | 2019-01-11 | 2020-07-16 | 华为技术有限公司 | 通信方法和通信装置 |
| JP2021017791A (ja) | 2019-07-24 | 2021-02-15 | 株式会社大野板金 | 屋根金物及びその取り付け方法 |
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| US20200154467A1 (en) * | 2017-06-15 | 2020-05-14 | Huawei Technologies Co., Ltd. | Method and Devices for Multiple Transmit Receive Point Cooperation for Reliable Communication |
| WO2020143692A1 (zh) * | 2019-01-11 | 2020-07-16 | 华为技术有限公司 | 通信方法和通信装置 |
| JP2021017791A (ja) | 2019-07-24 | 2021-02-15 | 株式会社大野板金 | 屋根金物及びその取り付け方法 |
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