CN115804199A - Terminal, wireless communication method, and base station - Google Patents

Abstract

A terminal according to an embodiment of the present disclosure includes: a reception unit that receives a transmission setting indication (TCI) state for a channel state information reference signal (CSI-RS) resource within a CSI-RS resource set to which Tracking Reference Signal (TRS) information is set; and a control unit which uses the TCI status in reception of the CSI-RS, the TCI status representing a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block. According to one aspect of the present disclosure, the TRS can be appropriately received.

Description

Terminal, wireless communication method, and base station

Technical Field

The present disclosure relates to a terminal, a wireless communication method, and a base station in a next-generation mobile communication system.

Background

In a Universal Mobile Telecommunications System (UMTS) network, long Term Evolution (LTE) is standardized for the purpose of further high data rate, low latency, and the like (non-patent document 1). In addition, LTE-Advanced (3 GPP rel.10-14) is standardized for the purpose of further large capacity, advanced development, and the like of LTE (Third Generation Partnership Project (3 GPP)) versions (Release (rel.)) 8, 9).

Successor systems of LTE, such as also referred to as a fifth generation mobile communication system (5G), 5G + (plus), a sixth generation mobile communication system (6G), new Radio (NR), 3gpp rel.15 and so on, are also being studied.

Documents of the prior art

Non-patent document

Non-patent document 1:3GPP TS 36.300V8.12.0' Evolved Universal Radio Access (E-UTRA) and Evolved Universal Radio Access Network (E-UTRAN); an Overall Description; stage 2 (Release 8) ", 4 months 2010

Disclosure of Invention

Problems to be solved by the invention

In a future wireless communication system (for example, NR), it is being studied that a User terminal (terminal, user Equipment (UE)) controls a reception process based on a Tracking Reference Signal (TRS).

However, if the TRS cannot be appropriately or effectively used, there is a concern of a reduction in throughput or the like.

Accordingly, it is an object of the present disclosure to provide a terminal, a wireless communication method, and a base station that appropriately receive a TRS.

Means for solving the problems

A terminal according to an embodiment of the present disclosure includes: a reception unit that receives a transmission setting indication (TCI) state for a channel state information reference signal (CSI-RS) resource within a CSI-RS resource set to which Tracking Reference Signal (TRS) information is set; and a control unit using the TCI state in reception of the CSI-RS, the TCI state representing a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block.

Effects of the invention

According to one aspect of the present disclosure, a TRS can be appropriately received.

Drawings

Fig. 1A and 1B show an example of setting of the SSB of the non-serving cell.

Fig. 2A and 2B show another example of setting of the SSB of the non-serving cell.

Fig. 3A and 3B are diagrams illustrating an example of the MAC CE of option 1 of the first procedure.

Fig. 4A and 4B are diagrams illustrating an example of the MAC CE of option 2 of the first procedure.

Fig. 5 is a diagram showing an example of a MAC CE according to a modification of the first procedure.

Fig. 6 is a diagram showing an example of a MAC CE according to another modification of the first procedure.

Fig. 7A and 7B are diagrams illustrating an example of the MAC CE of option 1 of the second procedure.

Fig. 8A and 8B are diagrams illustrating an example of the MAC CE of option 2 of the second procedure.

Fig. 9A to 9C are diagrams showing an example of MAC CEs of options 3 to 5 of the second procedure.

Fig. 10A and 10B are diagrams illustrating an example of the MAC CE of option 1 of the third procedure.

Fig. 11A and 11B are diagrams illustrating an example of the MAC CE of option 2 of the third procedure.

Fig. 12A and 12B are diagrams illustrating an example of a MAC CE according to a modification of the third procedure.

Fig. 13A and 13B are diagrams illustrating an example of a MAC CE according to another modification of the third procedure.

Fig. 14A and 14B are diagrams illustrating an example of operations of a plurality of UEs.

Fig. 15A and 15B are diagrams illustrating an example of scheduling restrictions.

Fig. 16 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment.

Fig. 17 is a diagram showing an example of the configuration of a base station according to an embodiment.

Fig. 18 is a diagram showing an example of the configuration of a user terminal according to an embodiment.

Fig. 19 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment.

Detailed Description

(TCI, spatial relationship, QCL)

In NR, studies are underway: reception processing (e.g., at least one of reception, demapping, demodulation, and decoding) and Transmission processing (e.g., at least one of Transmission, mapping, precoding, modulation, and coding) in the UE of at least one of a control signal and a channel (expressed as a signal/channel) based on a Transmission Configuration Indication state (TCI state).

The TCI status may also represent the status of the signal/channel being applied to the downlink. A state corresponding to a TCI state of a signal/channel applied to an uplink may also be expressed as a spatial relationship (spatial relationship).

The TCI state is Information related to Quasi-Co-Location (QCL) of a signal/channel, and may also be referred to as Spatial reception parameter(s), spatial relationship Information (Spatial correlation Information), and the like. The TCI status may also be set to the UE per channel or per signal.

QCL is an index representing the statistical properties of a signal/channel. For example, the case where a certain signal/channel and other signals/channels are in a QCL relationship may also mean: among the different signals/channels, at least one of Doppler shift (Doppler shift), doppler spread (Doppler spread), average delay (average delay), delay spread (delay spread), and spatial parameter (spatial parameter) (e.g., spatial Rx parameter) can be assumed to be the same (QCL for the at least one).

In addition, the spatial reception parameters may also correspond to reception beams (e.g., reception analog beams) of the UE, and may also be determined based on the spatial QCL. QCLs (or elements of at least one of the QCLs) in the present disclosure may also be replaced with sqcls (spatial QCLs).

QCLs may also be specified in multiple types (QCL types). For example, four QCL types a to D that can be assumed to be different for the same parameter (or parameter set) may also be set, and this parameter (which may also be referred to as a QCL parameter) is denoted below:

QCL type A (QCL-A): doppler shift, doppler spread, mean delay, and delay spread,

QCL type B (QCL-B): the doppler shift and the doppler spread are then combined,

QCL type C (QCL-C): the doppler shift and the average delay are then determined,

QCL type D (QCL-D): the space receives the parameters.

A relationship that a UE assumes a certain Set of Control resources (CORESET), a channel or a reference signal has a specific QCL (e.g., QCL type D) with other CORESETs, channels or reference signals may also be referred to as QCL assumption (qclassumpt).

The UE may also determine at least one of a transmit beam (Tx beam) and a receive beam (Rx beam) of a signal/channel based on the TCI status or QCL assumption of the signal/channel.

The TCI state may be information relating to QCL between a target channel (in other words, a Reference Signal (RS)) and another Signal (for example, another RS). The TCI status may also be set (indicated) by higher layer signaling, physical layer signaling, or a combination thereof.

The physical layer signaling may be, for example, downlink Control Information (DCI)).

The Channel to which the TCI state or spatial relationship is set (designated) may be at least one of a Downlink Shared Channel (Physical Downlink Shared Channel (PDSCH)), a Downlink Control Channel (Physical Downlink Control Channel (PDCCH))), an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH)), and an Uplink Control Channel (Physical Uplink Control Channel (PUCCH)).

The RS that has a QCL relationship with the Channel may be at least one of a Synchronization Signal Block (SSB), a Channel State Information Reference Signal (CSI-RS), a measurement Reference Signal (Sounding Reference Signal (SRS)), a Tracking CSI-RS (also referred to as Tracking Reference Signal (TRS)), and a QCL detection Reference Signal (also referred to as QRS), for example.

The SSB is a Signal block including at least one of a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Broadcast Channel (Physical Broadcast Channel (PBCH)). The SSB may also be referred to as an SS/PBCH block.

The RS of QCL type X of TCI state may also mean an RS in a QCL type X relationship with (the DMRS of) a certain channel/signal, which may also be referred to as QCL source of QCL type X of the TCI state.

(Path loss RS)

Path loss PL in transmission power control of PUSCH, PUCCH, and SRS _b，f，c (q _d )[dB]Index q of reference signal (RS, pathloss reference RS (PathlossReferenceRS)) for downlink BWP associated with activated ul BWP b of carrier f of serving cell c is used _d And is calculated by the UE. In the present disclosure, a path loss reference RS, a Path Loss (PL) -RS, an index q _d The RS used for the path loss calculation and the RS resource used for the path loss calculation may be replaced with each other. In the present disclosure, calculation, estimation, measurement, tracking (track) may also be substituted for each other.

A conventional mechanism is being studied for changing the upper layer filter RSRP (high layer filtered RSRP) used for path loss measurement when the path loss RS is updated by the MAC CE.

In case the path loss RS is updated by the MAC CE, the L1-RSRP based path loss measurement may also be applied. The upper layer filter RSRP may also be used for path loss measurement at an available timing after the MAC CE used to update the path loss RS, and the L1-RSRP may be used for path loss measurement before the upper layer filter RSRP is applied. The higher layer filter RSRP may be used for the path loss measurement at an available timing after the MAC CE used for updating the path loss RS, and the higher layer filter RSRP of the previous path loss RS may be used before the available timing. As in the operation of rel.15, the higher layer filter RSRP is used for path loss measurement, and the UE can also track (track) all path loss RS candidates set by RRC. The maximum number of path loss RSs that can be set by RRC may also depend on the UE capabilities. When the maximum number of path loss RSs that can be set by the RRC is X, path loss RS candidates equal to or less than X may be set by the RRC, and a path loss RS may be selected by the MAC CE from among the set path loss RS candidates. The maximum number of path loss RSs that can be set by RRC may be 4, 8, 16, 64, or the like.

In the present disclosure, the higher layer filter RSRP, the filtered RSRP, the layer 3filter RSRP (layer 3filtered RSRP) may also be replaced with each other.

(Default TCI State/Default spatial relationship/Default PL-RS)

In the RRC connected mode, in both the case where the intra-DCI TCI information (higher layer parameter TCI-PresentInDCI) is set to "valid (enabled))" and the case where the intra-DCI TCI information is not set, in the case where a time offset between reception of a DL DCI (DCI scheduling a PDSCH) and a corresponding PDSCH (PDSCH scheduled through the DCI) is less than a threshold (timeDurationForQCL) (application condition, first condition), if in the case of non-cross-carrier scheduling, the TCI state of the PDSCH (default TCI state) may also be the TCI state of the lowest CORESET ID within the latest slot within the activated DL BWP of the CC (of a specific UL signal). In a case where this is not the case, the TCI state of the PDSCH (default TCI state) may also be the TCI state of the lowest TCI state ID of the PDSCH within the active DLBWP of the scheduled CC.

In rel.15, MAC CEs for activation/deactivation of PUCCH spatial relationships and respective MAC CEs for activation/deactivation of SRS spatial relationships are required. The PUSCH spatial relationship follows the SRS spatial relationship.

In rel.16, at least one of the MAC CE for activation/deactivation of PUCCH spatial relation and the MAC CE for activation/deactivation of SRS spatial relation may not be used.

If both the spatial relationship for the PUCCH and the PL-RS are not set in FR2 (application condition, second condition), the spatial relationship and the default assumption for the PL-RS (default spatial relationship and default PL-RS) are applied to the PUCCH. If both the spatial relationship and PL-RS for SRS (SRS resource for SRS, or SRS resource corresponding to SRI in DCI format 0_ 1 for scheduling PUSCH) are not set in FR2 (application condition, second condition), the spatial relationship and default assumption of PL-RS (default spatial relationship and default PL-RS) are applied to PUSCH and SRS scheduled in DCI format 0_ 1.

The default spatial relationship and default PL-RS may also be the TCI state or QCL assumption of the CORESET with the lowest CORESET ID within the active DL BWP on the CC if CORESET is set within the active DL BWP. The default spatial relationship and default PL-RS may also be the active TCI state with the lowest ID of PDSCH within the active DL BWP on that CC if CORESET is not set within the active DL BWP.

In rel.15, the spatial relationship of the PUSCH scheduled by DCI format 0_0 follows the spatial relationship of the PUCCH resource having the lowest PUCCH resource ID among the active spatial relationships of the PUCCH on the same CC. Even in case PUCCH is not transmitted on SCell, the network needs to update PUCCH spatial relationships on all scells.

In rel.16, PUCCH setting for PUSCH scheduled in DCI format 0_0 is not required. For the PUSCH scheduled in DCI format 0_0, if there is no active PUCCH spatial relationship or PUCCH resource on the active UL BWP in the CC (application condition, second condition), the default spatial relationship and default PL-RS are applied to the PUSCH.

The condition of the default spatial relationship/default PL-RS for SRS to be applied may also include that the default beam path loss activation information element (higher layer parameter enabledeultbeamforsrs) for SRS is set to be valid. The condition of the default spatial relationship/default PL-RS for PUCCH being applied may also include that a default beam path loss activation information element (higher layer parameter enabledeaultbeamplfpucch) for PUCCH is set to be valid. The condition to which the default spatial relationship/default PL-RS for PUSCH scheduled by DCI format 0_0 is applied may also include that a PUSCH scheduled by DCI format 0_0 is set to default beam path loss activation information element (higher layer parameter enabledeultbeamforpusch 0_ 0) is set to valid.

The Threshold may be referred to as a QCL time length (time duration), "timeduration for QCL", "Threshold (Threshold)", "Threshold for Offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", "Threshold-scheduled-Offset", a scheduling (schedule) Offset Threshold, a scheduling (scheduling) Offset Threshold, and the like.

(CSI)

In NR, a UE measures a Channel State using a reference signal (or a resource for the reference signal), and feeds back (reports) Channel State Information (CSI) to a network (e.g., a base station).

The UE may measure the Channel State using at least one of a Channel State Information Reference Signal (CSI-RS), a Synchronization Signal/Broadcast Channel (Synchronization Signal/Physical Broadcast Channel (SS/PBCH)) block, a Synchronization Signal (SS), a DeModulation Reference Signal (DMRS), and the like.

The CSI-RS resource may also include at least one of a Non-Zero Power (Non Zero Power (NZP)) CSI-RS resource, a Zero Power (ZP)) CSI-RS resource, and a CSI Interference Measurement (CSI-IM) resource.

The Resource for measuring a Signal component for CSI may be referred to as a Signal Measurement Resource (SMR) or a Channel Measurement Resource (CMR). SMR (CMR) may also include NZP CSI-RS resources for channel measurement, SSB, and the like, for example.

A Resource for measuring an Interference component for CSI may also be referred to as an Interference Measurement Resource (IMR). The IMR may also contain, for example, at least one of NZP CSI-RS resources, SSBs, ZP CSI-RS resources, and CSI-IM resources for interference measurement.

The SS/PBCH block is a block that includes a Synchronization Signal (e.g., primary Synchronization Signal (PSS)), secondary Synchronization Signal (SSs)), PBCH (and corresponding DMRS), and may also be referred to as an SS block (SSB), or the like.

In addition, the CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), an SS/PBCH Block Resource Indicator (SSBRI), a Layer Indicator (LI)), a Rank Indicator (RI)), an L1-RSRP (Reference Signal Received Power in Layer 1), an L1-RSRQ (Reference Signal Received Quality), an L1-SINR (Signal to Interference Noise Ratio), and the like.

The CSI may also have multiple parts. The CSI part 1 may also contain information (e.g., RI) with a relatively small number of bits. The CSI section 2 may include information (for example, CQI) having a relatively large number of bits, such as information determined based on the CSI section 1.

Furthermore, CSI may also be classified into several CSI types. The type, size, etc. of information of the report (report) may also be different according to the CSI type. For example, a CSI type (also referred to as type 1 (type I) CSI, CSI for a single beam, or the like) set for performing communication using a single beam and a CSI type (also referred to as type 2 (type II) CSI, CSI for a multi-beam, or the like) set for performing communication using a multi-beam may be defined. The usage of the CSI type is not limited thereto.

As a feedback method of CSI, periodic CSI (P-CSI)) reports, aperiodic CSI (a-CSI, AP-CSI) reports, semi-Persistent CSI (SP-CSI) reports, and the like are being studied.

The UE may also be notified of CSI measurement setting information using higher layer signaling, physical layer signaling, or a combination thereof.

In the present disclosure, the higher layer signaling may be any one of Radio Resource Control (RRC) signaling, medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof, for example.

MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), and the like. The broadcast Information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum System Information (Remaining Minimum System Information (RMSI)), other System Information (OSI)), or the like.

The physical layer signaling may be, for example, downlink Control Information (DCI).

The CSI measurement setting information may be set using, for example, an RRC information element "CSI-MeasConfig". The CSI measurement setting information may include CSI resource setting information (RRC information element "CSI-ResourceConfig"), CSI report setting information (RRC information element "CSI-ReportConfig"), and the like. The CSI resource setting information is associated with resources for CSI measurement, and the CSI report setting information is associated with how the UE performs CSI reporting.

The RRC information element (or RRC parameter) related to the CSI report setting and the CSI resource setting will be described.

The CSI report configuration information ("CSI-ReportConfig") includes resource information for channel measurement ("resources for channel measurement"). The CSI report setting information may include interference measurement resource information (for example, NZP-CSI-RS-resource for interference information ("NZP-CSI-RS-resource for interference"), interference measurement CSI-IM resource information ("CSI-IM-resource for interference"), and the like). These resource information correspond to an ID (Identifier) of CSI resource setting information ("CSI-ResourceConfigId").

The ID of the CSI resource setting information (which may be referred to as CSI resource setting ID) corresponding to each resource information may be one or a plurality of the same values, or may be different values.

The CSI resource setting information ("CSI-ResourceConfig") may also include a CSI resource setting information ID, CSI-RS resource set list information ("CSI-RS-ResourceSetList"), a resource type ("resourcettype"), and the like. The CSI-RS resource set list may also contain at least one of information of NZP CSI-RS and SSB for measurement ("NZP-CSI-RS-SSB") and CSI-IM resource set list information ("CSI-IM-ResourceSetList").

The resource type indicates a behavior (behavior) of the resource setting in the time domain, and may be set to "aperiodic", "semi-persistent", or "periodic". For example, the respectively corresponding CSI-RS may also be referred to as AP-CSI-RS (A-CSI-RS), SP-CSI-RS, P-CSI-RS.

The channel measurement resource may be used for calculation of CQI, PMI, L1-RSRP, and the like, for example. The interference measurement resource may be used for calculation of L1-SINR, L1-SNR, L1-RSRQ, or other interference-related index.

(Beam management)

In DL/UL beam management, more effective beam management such as lower delay, lower overhead, and the like is being studied.

In rel.16, the NZP CSI-RS resource set information element (NZP-CSI-RS-resources set) may also contain Tracking RS (TRS) information (TRS-Info). The QCL (QCL-InfoPeriodcCSI-RS, TCI status, TCI-StateId) is set for each NZP CSI-RS Resource information element (NZP-CSI-RS-Resource).

For periodic CSI-RS (P-CSI-RS) within the NZP CSI-RS resource set for which TRS information (higher layer parameters TRS-Info) is set, the UE assumes that the TCI state represents one of the following QCL types.

"QCL type C" accompanying SS/PBCH blocks and "QCL type D" accompanying the same SS/PBCH blocks if applicable.

"QCL type C" accompanying the SS/PBCH block and "QCL type D" accompanying, if applicable, CSI-RS resources within the NZP CSI-RS resource set for which repetition (repetition) is set.

For a periodic CSI-RS (P-CSI-RS) within a set of NZP CSI-RS resources for which TRS information is set, the UE assumes: the TCI state indicates "QCL type a" accompanying a P-CSI-RS resource within the NZP CSI-RS resource set to which TRS information is set and "QCL type D" accompanying the same P-CSI-RS resource if applicable.

SSBs or QCL sources with repeated CSI-RSs may also be periodic TRSs (P-TRSs). The P-TRS is a QCL source of aperiodic TRS.

The UE to which the NZP CSI-RS resource set to which the TRS information is set may have CSI-RS resources set to the following settings 1 and 2.

[ setting 1]

Periodicity of CSI-RS resources within a set of NZP CSI-RS resources with the same periodicity, bandwidth, and subcarrier position set.

[ setting 2]

P-CSI-RS within a certain set, AP-CSI-RS resources with the same bandwidth (with the same RB location) and AP-CSI-RS resources within a second set with P-CSI-RS resources, AP-CSI-RS resources that are, if applicable, of "QCL type a" and "QCL type D" accompanying the P-CSI-RS resources. In frequency range 2, the UE does not assume: the scheduling Offset between the last symbol of the PDCCH carrying the triggering DCI and the first symbol of the AP-CSI-RS resource is less than a scheduling Offset threshold (threshold scheduled-Offset) reported by the UE. The UE is assumed to be: for the P-CSI-RS resource set and the AP-CSI-RS resource set, the AP-CSI-RS resource set is set with the same number of CSI-RS resources, and is set with the same number of CSI-RS resources in a certain time slot. In the case where a set of AP-CSI-RS resources is triggered and the P-CSI-RS resource associated therewith is set with four P-CSI-RS resources having two consecutive slots with two P-CSI-RS resources within each slot, the aperiodic trigger offset (high-level parameter aperiodicTriggeringOffset) represents the trigger offset for the first slot for the first two CSI-RS resources within the set.

As described above, the QCL source for the AP-TRS is the P-TRS. This means that the P-TRS is always set or if not, the AP-TRS is not set. This is not efficient for the AP-TRS. Further, in the NR-unlicensed (U) or licensed band (e.g., 52.6GHz band), it is difficult to make the P-TRS or periodic RS reliable because of Listen Before Talk (LBT). AP-TRS or aperiodic RS is more useful. In this case, the AP-TRS separated from the P-TRS is effective.

If the TRS cannot be appropriately or effectively utilized, there is a fear of a decrease in throughput or the like.

Accordingly, the inventors of the present invention have conceived a TCI status/QCL assumption decision method of the TRS.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The structures described in the embodiments may be used alone or in combination.

In the present disclosure, "a/B", "at least one of a and B" may also be substituted for each other. In the present disclosure, cell, CC, carrier, BWP, DL BWP, UL BWP, active DL BWP, active UL BWP, band may be replaced with each other. In the present disclosure, the index, ID, indicator, resource ID may be replaced with each other. In the present disclosure, RRC parameters, higher layer parameters, RRC Information Elements (IEs), RRC messages may also be replaced with each other. In the present disclosure, support, control, controllable, operational, operable, or interchangeable.

In the present disclosure, activation (activate), update (update), indication (indication), valid (enable), and specification (specification) may be replaced with each other.

In the present disclosure, MAC CE, activation/deactivation commands may also be substituted for each other.

In the present disclosure, the higher layer signaling may be any one of Radio Resource Control (RRC) signaling, medium Access Control (MAC) signaling, broadcast information, and the like, or a combination thereof, for example.

For example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), or the like may be used for the MAC signaling. The broadcast Information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), minimum System Information (Remaining Minimum System Information (RMSI)), other System Information (OSI)), or the like.

In the present disclosure, beams, spatial domain filters, TCI states, QCL hypotheses, QCL parameters, spatial domain receive filters, UE receive beams, DL receive beams, DL precodes, DL precoders, DL-RS, QCL type D for TCI states, RS for TCI states or QCL type D for QCL hypotheses, RS for TCI states or QCL type a for QCL hypotheses, spatial relationships, spatial domain transmit filters, UE transmit beams, UL transmit beams, UL precodes, UL precoders may also be substituted for each other. In the present disclosure, QCL type X-RS, DL-RS associated with QCL type X, DL-RS with QCL type X, a source of DL-RS, SSB, CSI-RS may also be substituted for each other.

In the present disclosure, a CC list, a cell list, a list that can be applied, a simultaneous TCI update list, simultaneousTCI-UpdateList-r16/simultaneousTCI-UpdateList second-r16, a simultaneous TCI cell list, simultaneousTCI-CellList, simultaneousTCI-spatial update list, simultaneousSpatial-update-r 16/simultaneousSpatial-update-r 16, simultaneousSpatial-update-r 16/simultaneousSpatial-update-second-r 16, a configured CC, a configured list, a BWP/CC within a configured list, all BWP/CCs within a configured list, BWP/CC indicated by an activation command, a received MAC CC indicated by a received command, a received space CC, and a replacement information for at least one of the spatial information of a plurality of CCs may be represented with each other as well.

In the present disclosure, P-CSI-RS, NZP-CSI-RS may also be substituted for each other. In the present disclosure, CSI-RS resources, CSI-RS resource sets, CSI-RS resource groups, information Elements (IEs) may also be substituted for one another.

In the disclosure, the CSI-RS, NZP CSI-RS, TRS, tracking CSI-RS, CSI-RS with TRS information (high level parameter TRS-Info), NZP CSI-RS resources within the NZP CSI-RS resource set with TRS information may also be replaced with each other.

In the present disclosure, listen Before Talk (LBT)), clear Channel Assessment (CCA), carrier sense, sensing of a Channel, or a Channel access procedure (shared spectrum Channel access procedure) may also be substituted for each other.

In the present disclosure, a shared spectrum (shared spectrum), a shared spectrum channel, an NR-U object frequency, an unlicensed band (unlicensed band), an unlicensed spectrum, an LAA SCell, an LAA Cell, a Primary Cell (Primary Cell: PCell, primary Secondary Cell (PSCell), special Cell (Special Cell: SCell)), a Secondary Cell (Secondary Cell: SCell), a sensed frequency (frequency band) of an applied channel may also be replaced with each other.

(Wireless communication method)

< first embodiment >

The QCL source for the AP-TRS may also be at least one of P-TRS, SSB. In the present disclosure, SSB, CSI-RS, TRS, NZP-CSI-RS, AP-CSI-RS, SP-CSI-RS, P-CSI-RS may also be substituted for each other.

For an AP-CSI-RS resource within a NZP CSI-RS resource set (NZP-CSI-RS-resources set) for which TRS information (higher layer parameter TRS-Info) is set, the UE may also assume at least one of the following assumptions 1 and 2.

[ imagine 1]

The TCI state represents "QCL type a" accompanying a P-CSI-RS resource within the NZP CSI-RS resource set for which TRS information is set and "QCL type D" accompanying the same P-CSI-RS resource if applicable.

[ imagine 2]

The TCI state represents "QCL type a"/"QCL type B"/"QCL type C" accompanying an SSB and "QCL type D" accompanying the same SSB if applicable.

Considering the support of inter-cell (inter-cell) mobility, the QCL source for the SSB of the AP-TRS may be the SSB of a non-serving cell or the SSB of a serving cell.

The QCL source of the AP-TRS may also be the SSB/CSI-RS/TRS of other serving cells. The TCI status of other serving cells may also be set/indicated as the TCI status of the AP-TRS. In this case, the P-TRS/SSB need not be transmitted on all cells.

The set relationship between the existing AP-TRS and P-TRS can be relaxed. The AP-TRS may be set independently without setting the P-TRS. The UE to which the NZP CSI-RS resource set to which the TRS information is set may have a CSI-RS resource set to at least one of the above-described setting 1, the above-described setting 2, and the following setting 3.

[ setting 3]

Aperiodic of CSI-RS resources within a set of NZP CSI-RS resources with the same bandwidth set.

According to the first embodiment described above, at least one of the P-TRS and the AP-TRS can be flexibly set.

< second embodiment >

For P-TRS, considering support of inter-cell (inter-cell) mobility, the QCL source of the SSB may be the SSB of the serving cell or the SSB of a non-serving cell.

The QCL source for the P-TRS may also be the SSB/CSI-RS/TRS for other serving cells. The TCI status of other serving cells may also be set/indicated as the TCI status of the P-TRS. In this case, the SSBs need not be transmitted on all cells.

The SRS resource for positioning in rel.16 is allowed to have spatial relationship information (spatialrelalationinfo) having an RS as a peripheral cell SSB. As shown in the example of fig. 1A, the non-serving cell SSB information (SSB-InfoNCell-16) in the spatial relationship information (spatial relationship infopos) of the positioning SRS in rel.16 includes an SSB index.

The non-serving cell SSB may also be set as a QCL source for the P-TRS.

As shown in the example of fig. 1B, QCL information (QCL-Info), represented by TCI state ID within P-TRS (NZP CSI-RS resource) resources, contains information of SSB of reference signal, which may also contain SSB index and physical cell ID.

As shown in the example of fig. 2A, the non-serving cell SSB information (SSB-InfoNCell-17) in the spatial relationship information (spatial relationship infopos) of the positioning SRS may also include an SSB Set Index (SSB-Set-Index) and a Set (list) of multiple SSB indices. As shown in the example of fig. 2B, QCL information (QCL-Info), represented by TCI state ID within P-TRS (NZP CSI-RS resource) resources, contains information of SSBs of reference signals, which may also contain SSB set index and physical cell ID.

Here, the SSB set index may also be 0 for the serving cell. For non-serving cells, the SSB set index may also be 1 or more. Up to x non-serving cell SSBs may be set for the QCL source for a certain UE. x may be 1 or other numbers.

According to the second embodiment described above, the QCL source of the P-TRS can be flexibly set.

< third embodiment >

The QCL of the P/AP-TRS is set by RRC signaling. The QCL of the P/AP-TRS is preferably updated more efficiently.

The UE may also support MAC CE based QCL updates for P-TRS/AP-TRS.

The new MAC CE for at least one of QCL update and activation/deactivation of the CSI-RS resource may also be applied to QCL update for at least one of P-CSI-RS resources within the NZP CSI-RS resource set to which TRS information is set and AP-CSI-RS resources within the NZP CSI-RS resource set to which TRS information is set.

The new MAC CE may also follow at least one of the following first to fifth procedures.

< first Process >)

The UE may also support TCI status/QCL assumption that the P-CSI-RS is updated with a new MAC CE.

The MAC CE may also contain one TCI state for the CSI-RS resource ID of one P-CSI-RS (non-zero power (NZP)) -CSI-RS), or the CSI-RS resource IDs of a plurality of P-CSI-RSs (NZP-CSI-RS), or the CSI-RS resource set ID (CSI-RS resource set ID) of one P-CSI-RS (NZP-CSI-RS), or the CSI-RS resource set ID (CSI-RS resource set ID) of a plurality of P-CSI-RSs (NZP-CSI-RS).

The MAC CE may also follow any of options 1 and 2 below.

"Option 1

TCI state updates are made per CSI-RS resource ID of the P-CSI-RS.

In the example of fig. 3A, the MAC CE includes at least one of a reserved bit (R) field, a serving cell ID field, a bandwidth part (BWP) ID field, a P-CSI-RS resource ID field, and a TCI state ID field. The TCI state of the P-CSI-RS resource represented by the P-CSI-RS resource ID is represented by a TCI state ID field.

In the example of fig. 3B, the MAC CE contains at least one of an R field, one serving cell ID field, one BWP ID field, N + 1P-CSI-RS resource IDs (CSI-RS resource IDs 0 to N) fields, and N +1 TCI state IDs (TCI state IDs 0 to N) fields. The N +1 TCI State ID fields correspond to the N + 1P-CSI-RS resource ID fields, respectively. The TCI status of each P-CSI-RS resource is represented by a corresponding TCI status ID field.

Option 2

The TCI state update is performed per CSI-RS resource set ID (CSI-RS resource set ID) of the P-CSI-RS.

In the example of fig. 4A, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, a P-CSI-RS resource set ID field, and a TCI state ID field. The TCI state of the P-CSI-RS resource set represented by the P-CSI-RS resource set ID is represented by a TCI state ID field.

In the example of fig. 4B, the MAC CE contains at least one of an R field, one serving cell ID field, one BWP ID field, N + 1P-CSI-RS resource set IDs (CSI-RS resource set IDs 0 to N) fields, and N +1 TCI state IDs (TCI state IDs 0 to N) fields. The N +1 TCI State ID fields correspond to the N + 1P-CSI-RS resource set ID fields, respectively. The TCI status of each P-CSI-RS resource set is represented by a corresponding TCI status ID field.

Modifications of the invention

The MAC CE may also contain one or more P-CSI-RS resource set IDs and TCI states for each P-CSI-RS resource within the resource set.

In the example of fig. 5, the MAC CE contains at least one of an R field, one serving cell ID field, one BWP ID field, one P-CSI-RS resource set ID field, and M +1 TCI state IDs (TCI state IDs 0 to M) fields. M + 1P-CSI-RS resources within the P-CSI-RS resource set, represented by a P-CSI-RS resource set ID, correspond to the M +1 TCI state ID fields. The TCI status of each P-CSI-RS resource is represented by a corresponding TCI status ID field.

In the example of fig. 6, the MAC CE contains at least one of an R field, one serving cell ID field, one BWP ID field, N + 1P-CSI-RS resource set IDs (CSI-RS resource set IDs 0 to N) fields, and M +1 TCI state IDs (TCI state IDs 0 to M) fields per P-CSI-RS resource set ID field. The M + 1P-CSI-RS resources within the P-CSI-RS resource set represented by each P-CSI-RS resource set ID correspond to consecutive M +1 TCI State ID fields. The TCI status of each P-CSI-RS resource is represented by a corresponding TCI status ID field.

According to the above first procedure, the TCI state of the P-CSI-RS can be changed without RRC reconfiguration, and a plurality of P-CSI-RS resources can be efficiently used.

< second Process >

The UE may also support the P-CSI-RS to be activated/deactivated via the new MAC CE.

The MAC CE may also contain one P-CSI-RS resource, or one set of P-CSI-RS resources, or multiple P-CSI-RS resources, or activation/deactivation for multiple sets of P-CSI-RS resources. For multiple P-CSI-RS resource/P-CSI-RS resource sets, the MAC CE may indicate the P-CSI-RS resource ID/P-CSI-RS resource set ID explicitly, or may indicate the P-CSI-RS resource ID/P-CSI-RS resource set ID through a bitmap.

The TCI status for the P-CSI-RS Resource (e.g., information element qcl-InfoPeriodicCSI-RS (TCI-StateId)) may also be set through RRC signaling (e.g., information element NZP-CSI-RS-Resource). The MAC CE in the second procedure may not contain the TCI status ID field. The TCI state set by the RRC parameter may also be used in the transmission of the P-CSI-RS.

The MAC CE may also follow any one of the following options 1 to 5.

Option 1

For one or more P-CSI-RS resources, activation/deactivation is performed per CSI-RS resource ID.

In the example of fig. 7A, the MAC CE includes at least one of an activation/deactivation (a/D) field, a serving cell ID field, a BWP ID field, and a P-CSI-RS resource ID field. Activation or deactivation of the P-CSI-RS resource represented by the P-CSI-RS resource ID is represented by the a/D field.

In the example of fig. 7B, the MAC CE contains at least one of an R field, one serving cell ID field, one BWP ID field, N +1 a/D fields, N + 1P-CSI-RS resource ID fields. The N + 1A/D fields correspond to the N + 1P-CSI-RS resource ID fields, respectively. Activation or deactivation of each P-CSI-RS resource is indicated by a corresponding a/D field.

"Option 2

For one or more P-CSI-RS resource sets or P-CSI-RS resource groups, activating/deactivating is performed per each P-CSI-RS resource set ID or P-CSI-RS resource group ID.

In the example of fig. 8A, the MAC CE includes one activation/deactivation (a/D) field, one serving cell ID field, one BWP ID field, and one P-CSI-RS resource set ID field. Activation or deactivation of a P-CSI-RS resource set represented by a P-CSI-RS resource set ID is represented by an a/D field.

In the example of fig. 8B, the MAC CE contains at least one of an R field, one serving cell ID field, one BWP ID field, N +1 a/D fields, and N + 1P-CSI-RS resource set ID fields. The N + 1A/D fields correspond to the N + 1P-CSI-RS resource set ID fields, respectively. Activation or deactivation of each set of P-CSI-RS resources is indicated by a corresponding a/D field.

< option 3 >

The same activation/deactivation is made for multiple P-CSI-RS resources.

In the example of fig. 9A, the MAC CE contains at least one of one a/D field, one serving cell ID field, one BWP ID field, N + 1P-CSI-RS resource ID fields. Activation or deactivation of N + 1P-CSI-RS resources is indicated by one a/D field.

Option 4

The same activation/deactivation is made for multiple sets of P-CSI-RS resources.

In the example of fig. 9B, the MAC CE contains at least one of one a/D field, one serving cell ID field, one BWP ID field, an R field, and N + 1P-CSI-RS resource set ID fields. Activation or deactivation of N +1 sets of P-CSI-RS resources is represented by one A/D field.

"Option 5

The MAC CE represents activation/deactivation for each P-CSI-RS resource or each set of P-CSI-RS resources through a bitmap.

In the example of fig. 9C, the MAC CE includes at least one of an R field, a serving cell ID field, a BWP ID field, and a bitmap. The bitmap contains L a/D fields.

The bitmap may follow any of the following options 5A and 5B.

[ option 5A ]

The bitmap length L may also be the maximum number of P-CSI-RS resources. Each a/D field may also represent activation/deactivation of a corresponding P-CSI-RS resource.

[ option 5B ]

The bitmap length L may also be the set of P-CSI-RS resources or the maximum number of sets of P-CSI-RS resources. Each a/D field may also represent activation/deactivation of a corresponding set of P-CSI-RS resources or a corresponding set of P-CSI-RS resources.

According to the second procedure described above, activation/deactivation of the P-CSI-RS can be performed without RRC reconfiguration, and a plurality of P-CSI-RS resources can be efficiently utilized.

< third Process >)

The first process and the second process may also be combined.

The new MAC CE for P-CSI-RS may also follow either of options 1 and 2 below.

Option 1

The MAC CE may also activate the P-CSI-RS resource or set of P-CSI-RS resources with the updated TCI state.

In the example of fig. 10A, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, one P-CSI-RS resource set ID field, and one TCI state ID field. The TCI State ID field indicates a TCI state corresponding to the P-CSI-RS resource indicated by the P-CSI-RS resource set ID field.

In the example of fig. 10B, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, N + 1P-CSI-RS resource set ID fields, and N +1 TCI state ID fields. The N +1 TCI State ID fields correspond to the N + 1P-CSI-RS resource set ID fields, respectively.

Option 2

The MAC CE may also activate the P-CSI-RS resource or set of P-CSI-RS resources with updated TCI states. The MAC CE may also deactivate the P-CSI-RS resource or set of P-CSI-RS resources. The MAC CE for deactivation may also not contain a TCI status ID.

In the example of fig. 11A, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, one a/D field, one P-CSI-RS resource set ID field, one TCI status field. In case that the value of the a/D field is 1, the P-CSI-RS resource set represented by the P-CSI-RS resource set ID field is activated, and the TCI status field may also exist. In case that the value of the a/D field is 0, the P-CSI-RS resource set represented by the P-CSI-RS resource set ID field is deactivated, or the TCI status field may not exist.

In the example of fig. 11B, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, N +1 a/D fields, N + 1P-CSI-RS resource set ID fields, and N +1 TCI state ID fields. The N + 1A/D fields correspond to the N + 1P-CSI-RS resource set ID fields, respectively. The N +1 TCI State ID fields correspond to the N + 1P-CSI-RS resource set ID fields, respectively. In case that the value of the a/D field is 1, the P-CSI-RS resource set represented by the corresponding P-CSI-RS resource set ID field is activated, and there may also be a corresponding TCI status field. In case that the value of the a/D field is 0, the P-CSI-RS resource set represented by the corresponding P-CSI-RS resource set ID field is deactivated, or the corresponding TCI state field may not exist.

Modifications of the invention

The MAC CE may also contain one or more P-CSI-RS resource set IDs and TCI states for each P-CSI-RS resource within the resource set.

In the example of fig. 12A, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, one P-CSI-RS resource set ID field, and M +1 TCI status fields. The P-CSI-RS resource set represented by one P-CSI-RS resource set ID field contains M + 1P-CSI-RS resources. The M +1 TCI status fields correspond to the M + 1P-CSI-RS resources, respectively.

In the example of fig. 12B, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, N + 1P-CSI-RS resource set ID fields, and M +1 TCI status fields per P-CSI-RS resource set ID field. The P-CSI-RS resource set represented by one P-CSI-RS resource set ID field contains M + 1P-CSI-RS resources. The M +1 TCI status fields corresponding to one set of P-CSI-RS resources correspond to M + 1P-CSI-RS resources within the set of P-CSI-RS resources, respectively.

In the example of fig. 13A, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, one a/D field, one P-CSI-RS resource set ID field, and M +1 TCI status fields. The set of P-CSI-RS resources, represented by one P-CSI-RS resource set ID field, contains M + 1P-CSI-RS resources. The M +1 TCI status fields correspond to the M + 1P-CSI-RS resources, respectively. In case that the value of the a/D field is 1, the P-CSI-RS resource set represented by the P-CSI-RS resource set ID field is activated, and M +1 TCI status fields may also exist. In case that the value of the a/D field is 0, the P-CSI-RS resource set represented by the P-CSI-RS resource set ID field is deactivated, and M +1 TCI status fields may also not exist.

In the example of fig. 13B, the MAC CE contains at least one of an R field, a serving cell ID field, a BWP ID field, N +1 a/D fields, N + 1P-CSI-RS resource set ID fields, and M +1 TCI state ID fields per P-CSI-RS resource set ID field. The N + 1A/D fields correspond to the N + 1P-CSI-RS resource set ID fields, respectively. The P-CSI-RS resource set represented by one P-CSI-RS resource set ID field contains M + 1P-CSI-RS resources. The M +1 TCI state fields corresponding to one set of P-CSI-RS resources correspond to M + 1P-CSI-RS resources within the set of P-CSI-RS resources, respectively. In case that the value of the a/D field is 1, the P-CSI-RS resource set represented by the corresponding P-CSI-RS resource set ID field is activated, and there may also be corresponding M +1 TCI status fields. In case that the value of the a/D field is 0, the P-CSI-RS resource set represented by the corresponding P-CSI-RS resource set ID field is deactivated, or there may be no corresponding M +1 TCI status fields.

According to the third procedure described above, the state of the P-CSI-RS can be changed without RRC reconfiguration, and a plurality of P-CSI-RS resources can be efficiently used.

< fourth Process >)

The UE may also support updating the TCI state of the P-CSI-RS simultaneously across multiple CCs.

If an (indicated) serving cell indicated by a MAC CE for a P-CSI-RS resource or a set of P-CSI-RS resources is set as a part of the simultaneous TCI update list, the MAC CE may also be applied to all serving cells set in the simultaneous TCI update list. The MAC CE may also be any one of the MAC CEs of the first to third procedures. The indicated serving cell may also be the one indicated by the serving cell ID field within the MAC CE. The simultaneous TCI update list may also be a first simultaneous TCI update list (e.g., simultaneousTCI-UpdateList-r 16) or a second simultaneous TCI update list (e.g., simultaneousTCI-UpdateListSecond-r 16).

According to the above fourth procedure, the overhead of TCI status update can be suppressed.

< fifth Process >

The P-CSI-RS resource may be common to a plurality of UEs or may be shared among a plurality of UEs.

If the MAC CE updates the TCI status of the P-CSI-RS resource to one UE (e.g., the first procedure), it is difficult for a plurality of UEs to share the same P-CSI-RS resource.

In the example of fig. 14A and 14B, P-CSI-RS #1 to #4 are set. The P-CSI-RS #1 to #4 have TCIs #1 to #4, respectively.

In the example of fig. 14A, the MAC CE updates the TCI status of P-CSI-RS #2 from TCI #2 to #4. If the TCI states of the P-CSI-RS #2 are not updated simultaneously for all UEs, it is difficult for a plurality of UEs to share the P-CSI-RS #2.

Group common DCI (group common signaling) using the new RNTI may also be used. A specific field within the DCI may also indicate at least one of an update of a TCI state of the P-CSI-RS resource and an activation/deactivation of the P-CSI-RS resource. The DCI may also schedule a PDSCH containing a new MAC CE for at least one of an update of the TCI status of the P-CSI-RS resources and an activation/deactivation of the P-CSI-RS resources. The new MAC CE may also be any one of the MAC CEs of the first to fourth procedures.

If the P-CSI-RS resource is activated/deactivated by the MAC CE (e.g., the second procedure), a plurality of UEs can share the same P-CSI-RS resource.

In the example of fig. 14B, the active P-CSI-RS resource is P-CSI-RS #2. In this state, the MAC CE switches the active P-CSI-RS resource from P-CSI-RS #2 to P-CSI-RS #4. Since the TCI state of each P-CSI-RS resource does not change, a plurality of UEs can share the same P-CSI-RS resource. In the case where P-CSI-RS #2 is deactivated for one UE, whether P-CSI-RS #2 is actually transmitted for other UEs may also depend on the implementation of the base station. Deactivated P-CSI-RS may not be transmitted to all UEs.

The RRC parameter sets a plurality of P-CSI-RS resources, one TCI state/QCL is supposed to be mapped to one P-CSI-RS resource, and the MAC CE may also select/indicate one P-CSI-RS resource. The UE may also contemplate the TCI status/QCL assumption corresponding to the selected/indicated P-CSI-RS resource.

UE operation for activating CSI-RS resources and deactivating CSI-RS resources in option 2 of the second and third processes is illustrated.

The UE operation for activating CSI-RS resources can also be the same as Rel.15/16.

The UE may also not need to measure the deactivated P-CSI-RS resource in beam management (beam management)/layer 1 (L1) -RSRP/Beam Failure Recovery (BFR)/radio resource management (RLM).

UE operations related to rate matching/puncturing of PDSCH may also follow any of the following options 1 and 2.

Option 1

Deactivating CSI-RS resources may also be used in PDSCH. The PDSCH may not be rate matched/punctured in (around) the deactivated CSI-RS resources. This can improve the resource utilization efficiency.

"Option 2

Deactivating the CSI-RS resources is not used in the PDSCH. The PDSCH may also be rate matched/punctured in (around) deactivated CSI-RS resources. Thereby, a plurality of UEs can share the deactivated CSI-RS resource. The CSI-RS resources deactivated for a certain UE may also be activated for other UEs.

In simultaneous reception of the deactivated CSI-RS and other DL signals (PDSCH/CSI-RS/TRS/SSB, etc.) using different QCL types D, there may also be no scheduling restriction (restriction) caused by the deactivated CSI-RS. Thus, the base station can schedule PDSCH using a different QCL type D in the same symbol as the deactivated CSI-RS. The scheduling restriction caused by the particular signal (e.g., CSI-RS, deactivated CSI-RS) may also be that the UE cannot receive other DL signals using a different QCL type D than the QCL type of the particular signal in the same symbols as the particular signal.

In rel.15, there is a scheduling restriction in PDSCH using a different QCL type D on the same symbol as the SSB/CSI-RS.

In the example of fig. 15A, the TCI state of the PDSCH is TCI #3. The P-CSI-RS resources in symbols #1 to #8 have TCIs #1 to #8, respectively. In rel.15, only the symbol #3 of the P-CSI-RS resource having the same TCI state can be utilized in the PDSCH, and the symbols #1, #2, #4 to #8 of the P-CSI-RS resource having different TCI states cannot be utilized in the PDSCH.

In the example of fig. 15B, the second process is applied in the example of fig. 15A. Only the P-CSI-RS resource of symbol #3 is activated and the P-CSI-RS resources of symbols #1, #2, #4 to #8 are deactivated.

The UE may also not need to measure the P-CSI-RS resource and has no scheduling restrictions if the P-CSI-RS resource is deactivated. On the other hand, in the same symbol as the P-CSI-RS resource is activated, there may also be scheduling restrictions for PDSCH with different QCL type D.

The activation or deactivation of the P-CSI-RS resource may also be applied to P-CSI-RS resources having a specific purpose (e.g., L1-RSRP/beam management/BFR). For a P-CSI-RS resource having a purpose other than a specific purpose, the UE may also need to measure the measurement of the P-CSI-RS resource. The PDSCH having a different QCL type D may also have scheduling restrictions in the same symbol as the P-CSI-RS resource having a purpose other than the specific purpose.

According to the fifth procedure, a decrease in throughput due to scheduling restriction can be suppressed.

According to the above third embodiment, the P/AP-TRS can be efficiently updated.

< fourth embodiment >

New UE capabilities may also be specified as to whether SSBs (serving cell SSB/non-serving cell SSB) are supported as QCL sources for P-TRS.

New UE capabilities may also be specified as to whether or not non-serving cell SSBs are supported as QCL sources (for P-TRS or AP-TRS).

New UE capabilities may also be specified for the maximum number of non-serving cells supported as QCL sources (for P-TRS or AP-TRS).

At least one of the first to third embodiments may be applied only when the corresponding higher layer parameter (for example, activation information) is set. In cases other than this, the operation of Rel.15 or Rel.16 can also be applied.

If the higher layer parameter is not set, for the AP-CSI-RS resource in the NZP CSI-RS resource set to which the TRS information is set, the UE assumes: the TCI state indicates "QCL type a" accompanying a P-CSI-RS resource within the NZP CSI-RS resource set to which TRS information is set and "QCL type D" accompanying the same P-CSI-RS resource if applicable.

According to the fourth embodiment described above, the TRS can be flexibly set while maintaining compatibility with the existing specifications.

(Wireless communication System)

Hereinafter, a configuration of a radio communication system according to an embodiment of the present disclosure will be described. In this radio communication system, 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. 16 is a diagram showing an example of a schematic configuration of a radio communication system according to an embodiment. The wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE) standardized by the Third Generation Partnership Project (3 GPP), new wireless (5 th Generation mobile communication system New Radio (5G NR)) of the fifth Generation mobile communication system, or the like.

In addition, the wireless communication system 1 may also support Dual Connectivity (Multi-RAT Dual Connectivity (MR-DC)) between a plurality of Radio Access Technologies (RATs)). The MR-DC may include Dual connection of LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC))), dual connection of NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC))), and the like.

In EN-DC, a base station (eNB) of LTE (E-UTRA) is a Master Node (MN), and a base station (gNB) of NR is a Slave Node (SN). In NE-DC, the base station of NR (gNB) is MN and the base station of LTE (E-UTRA) (eNB) is SN.

The wireless communication system 1 may also support Dual connection between a plurality of base stations within the same RAT (for example, dual connection of a base station (gNB) in which both MN and SN are NR (NR-NR Dual Connectivity (NN-DC)))).

The radio communication system 1 may include a base station 11 forming a macrocell C1 having a relatively wide coverage area, and base stations 12 (12 a to 12C) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. The user terminal 20 may also be located in at least one cell. The arrangement, number, and the like of each cell and user terminal 20 are not limited to the illustrated embodiments. Hereinafter, the base stations 11 and 12 are collectively referred to as the base station 10 without distinguishing them.

The user terminal 20 may also 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 (CA) and Dual Connectivity (DC) using a plurality of Component Carriers (CCs)).

Each CC may be included in at least one of the first Frequency band (Frequency Range 1 (FR 1))) and the second Frequency band (Frequency Range 2 (FR 2))). The macro cell C1 may be included in FR1, and the small cell C2 may be included in FR 2. For example, FR1 may be a frequency band of 6GHz or less (less than 6GHz (sub-6 GHz)), and FR2 may be a frequency band higher than 24GHz (above-24 GHz). The frequency bands, definitions, and the like of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR 2.

The user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.

The plurality of base stations 10 may also be connected by wire (e.g., optical fiber based Common Public Radio Interface (CPRI)), X2 Interface, or the like) or wirelessly (e.g., NR communication). For example, when NR communication is used as a Backhaul between base stations 11 and 12, base station 11 corresponding to an upper station may be referred to as an Integrated Access Backhaul (IAB) host (donor) and base station 12 corresponding to a relay (relay) may be referred to as an IAB node.

The base station 10 may also be connected to the core network 30 via other base stations 10 or directly. The Core Network 30 may include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5 GCN)), a Next Generation Core (NGC), and the like.

The user terminal 20 may be a terminal supporting at least one of communication schemes such as LTE, LTE-a, and 5G.

The radio communication system 1 may use a radio access scheme based on Orthogonal Frequency Division Multiplexing (OFDM). For example, in at least one of the Downlink (DL) and the Uplink (UL), cyclic Prefix OFDM (CP-OFDM), discrete Fourier Transform Spread OFDM (DFT-s-OFDM), orthogonal Frequency Division Multiple Access (OFDMA), single Carrier Frequency Division Multiple Access (SC-FDMA), or the like may be used.

The radio access method may also be referred to as a waveform (waveform). In the radio communication system 1, other radio access schemes (for example, other single carrier transmission schemes and other multi-carrier transmission schemes) may be used for the UL and DL radio access schemes.

As the Downlink Channel, a Downlink Shared Channel (Physical Downlink Shared Channel (PDSCH)) Shared by the user terminals 20, a Broadcast Channel (Physical Broadcast Channel (PBCH))), a Downlink Control Channel (Physical Downlink Control Channel (PDCCH)), and the like may be used in the radio communication system 1.

In the radio communication system 1, as the Uplink Channel, an Uplink Shared Channel (Physical Uplink Shared Channel (PUSCH))), an Uplink Control Channel (Physical Uplink Control Channel (PUCCH))), a Random Access Channel (Physical Random Access Channel (PRACH)), and the like, which are Shared by the user terminals 20, may be used.

User data, higher layer control Information, a System Information Block (SIB), and the like are transmitted through the PDSCH. User data, higher layer control information, etc. may also be transmitted over the PUSCH. In addition, a Master Information Block (MIB)) may also be transmitted through PBCH.

The lower layer control information may also be transmitted through the PDCCH. The lower layer Control Information may include, for example, downlink Control Information (DCI)) including scheduling Information of at least one of a PDSCH and a PUSCH.

The DCI scheduling PDSCH may be referred to as DL assignment, DL DCI, or the like, and the DCI scheduling PUSCH may be referred to as UL grant, UL DCI, or the like. In addition, PDSCH may be replaced with DL data, and PUSCH may be replaced with UL data.

For PDCCH detection, a COntrol REsource SET (countrol REsource SET (CORESET)) and a search space (search space) may be used. CORESET corresponds to searching for DCI resources. The search space corresponds to a search region and a search method of PDCCH candidates (PDCCH candidates). A CORESET may also be associated with one or more search spaces. The UE may also monitor the CORESET associated with a certain search space based on the search space settings.

One search space may also correspond to PDCCH candidates corresponding to one or more aggregation levels (aggregation levels). The one or more search spaces may also be referred to as a set of search spaces. In addition, "search space", "search space set", "search space setting", "search space set setting", "CORESET setting", and the like of the present disclosure may be replaced with each other.

Uplink Control Information (UCI)) including at least one of Channel State Information (CSI), ACKnowledgement Information (which may also be referred to as Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK)), ACK/NACK, and Scheduling ReQuest (SR)) may also be transmitted through the PUCCH. The random access preamble for establishing a connection with a cell may also be transmitted through the PRACH.

In addition, in the present disclosure, a downlink, an uplink, and the like may also be expressed without "link". Note that the beginning of each channel may be expressed without "Physical (Physical)" being included.

In the wireless communication system 1, a Synchronization Signal (SS), a Downlink Reference Signal (DL-RS), and the like may be transmitted. The DL-RS may be a Cell-specific Reference Signal (CRS), a Channel State Information Reference Signal (CSI-RS), a DeModulation Reference Signal (DMRS), a Positioning Reference Signal (PRS), a Phase Tracking Reference Signal (PTRS), or the like, which is transmitted through the wireless communication system 1.

The Synchronization Signal may be at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), for example. The signal blocks containing the SS (PSS, SSs) and PBCH (and DMRS for PBCH) may also be referred to as SS/PBCH blocks, SS blocks (SSB), and the like. In addition, SS, SSB, etc. may also be referred to as reference signals.

In addition, in the wireless communication system 1, as an Uplink Reference Signal (UL-RS), a measurement Reference Signal (Sounding Reference Signal (SRS)), a demodulation Reference Signal (DMRS), or the like may be transmitted. In addition, the DMRS may also be referred to as a user terminal-specific Reference Signal (UE-specific Reference Signal).

(base station)

Fig. 17 is a diagram showing an example of the configuration of a base station according to an embodiment. The base station 10 includes a control unit 110, a transmitting/receiving unit 120, a transmitting/receiving antenna 130, and a transmission line interface (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 be provided in one or more numbers.

In this example, the functional blocks of the characteristic parts in the present embodiment are mainly shown, but it is also conceivable 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 performs overall control of the base station 10. The control unit 110 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 110 may also control generation of signals, scheduling (e.g., resource allocation, mapping), and the like. The control unit 110 may control transmission and reception, measurement, and the like using the transmission and reception unit 120, the transmission and reception antenna 130, and the transmission path interface 140. Control section 110 may generate data, control information, sequence (sequence), and the like to be transmitted as a signal, and forward the generated data, control information, sequence, and the like to transmission/reception section 120. The control unit 110 may perform call processing (setting, release, and the like) of a communication channel, state management of the base station 10, management of radio resources, and the like.

The transceiver 120 may also include a baseband (baseband) unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123. The baseband unit 121 may also include a transmission processing unit 1211 and a reception processing unit 1212. The transmission/reception section 120 can be configured by a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter (phase shifter), a measurement circuit, a transmission/reception circuit, and the like, which are described based on common knowledge in the technical field of the present disclosure.

The transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission unit may be constituted by the transmission processing unit 1211 and the RF unit 122. The receiving unit may be configured by the reception processing unit 1212, the RF unit 122, and the measurement unit 123.

The transmitting/receiving antenna 130 can be configured by an antenna described based on common knowledge in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like. The transmission/reception unit 120 may receive the uplink channel, the uplink reference signal, and the like.

Transmit/receive section 120 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, with respect to Data, control information, and the like acquired from Control section 110, transmission/reception section 120 (transmission processing section 1211) may perform processing of a Packet Data Convergence Protocol (PDCP) layer, processing of a Radio Link Control (RLC) layer (e.g., RLC retransmission Control), processing of a Medium Access Control (MAC) layer (e.g., HARQ retransmission Control), and the like, and generate a bit string to be transmitted.

Transmission/reception section 120 (transmission processing section 1211) may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filter processing (filtering), discrete Fourier Transform (DFT) processing (if necessary), inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

The transmission/reception section 120 (RF section 122) may perform modulation, filter processing, amplification, and the like on the baseband signal in the radio frequency band, and transmit the signal in the radio frequency band via the transmission/reception antenna 130.

On the other hand, the transmission/reception unit 120 (RF unit 122) may amplify, filter, demodulate a baseband signal, and the like, for a signal of a radio frequency band received by the transmission/reception antenna 130.

Transmission/reception section 120 (reception processing section 1212) may apply reception processing such as analog-to-digital conversion, fast Fourier Transform (FFT) processing, inverse Discrete Fourier Transform (IDFT) processing (if necessary), filter processing, demapping, demodulation, decoding (including error correction decoding, as well as MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data.

The transmission/reception unit 120 (measurement unit 123) may also perform measurement related to the received signal. For example, measurement section 123 may perform Radio Resource Management (RRM) measurement, channel State Information (CSI) measurement, and the like based on the received signal. Measurement section 123 may perform measurement of Received Power (e.g., reference Signal Received Power (RSRP)), received Quality (e.g., reference Signal Received Quality (RSRQ)), signal to Interference plus Noise Ratio (SINR)), signal to Noise Ratio (SNR)), signal Strength Indicator (e.g., received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 110.

The channel interface 140 may transmit and receive signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, and the like, or may acquire and transmit user data (user plane data) and control plane data and the like for the user terminal 20.

The transmitting unit and the receiving unit of the base station 10 in the present disclosure may be configured by at least one of the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission path interface 140.

Transmit/receive unit 120 may also transmit a transmission setting indication (TCI) state for a channel state information reference signal (CSI-RS) resource within a CSI-RS resource set to which Tracking Reference Signal (TRS) information is set. The control unit 110 may also use the TCI status in the transmission of CSI-RS. The TCI status may also represent a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block.

(user terminal)

Fig. 18 is a diagram showing an example of the configuration of a user terminal according to an embodiment. The user terminal 20 includes a control unit 210, a transmission/reception unit 220, and a transmission/reception antenna 230. Further, the control unit 210, the transmission/reception unit 220, and the transmission/reception antenna 230 may be provided with one or more antennas.

In this example, the functional blocks of the characteristic portions in the present embodiment are mainly shown, but it is also conceivable that the user terminal 20 further 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 performs overall control of the user terminal 20. The control unit 210 can be configured by a controller, a control circuit, and the like described based on common knowledge in the technical field of the present disclosure.

The control unit 210 may also control the generation, mapping, etc. of the signals. The control unit 210 may control transmission/reception, measurement, and the like using the transmission/reception unit 220 and the transmission/reception antenna 230. Control section 210 may generate data, control information, a sequence, and the like transmitted as a signal and forward the generated data, control information, sequence, and the like to transmission/reception section 220.

The transceiver unit 220 may also include a baseband unit 221, an RF unit 222, and a measurement unit 223. The baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212. The transmission/reception section 220 can be configured by 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 field of the present disclosure.

The transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured by a transmission unit and a reception unit. The transmission section may be constituted by the transmission processing section 2211 and the RF section 222. The receiving unit may be composed of a reception processing unit 2212, an RF unit 222, and a measuring unit 223.

The transmitting/receiving antenna 230 can be configured by an antenna described based on common recognition in the technical field of the present disclosure, for example, an array antenna.

The transmitting/receiving unit 220 may receive the downlink channel, the synchronization signal, the downlink reference signal, and the like. The transmission/reception unit 220 may transmit the uplink channel, the uplink reference signal, and the like described above.

Transmit/receive section 220 may form at least one of a transmit beam and a receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), and the like.

For example, the transmission/reception section 220 (transmission processing section 2211) may perform processing of the PDCP layer, processing of the RLC layer (for example, RLC retransmission control), processing of the MAC layer (for example, HARQ retransmission control), and the like on data, control information, and the like acquired from the control section 210, and generate a bit sequence to be transmitted.

Transmission/reception section 220 (transmission processing section 2211) may perform transmission processing such as channel coding (including error correction coding as well), modulation, mapping, filter processing, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on a bit sequence to be transmitted, and output a baseband signal.

Whether or not DFT processing is applied may be set based on transform precoding. When transform precoding is effective (enabled) for a certain channel (e.g., PUSCH), transmission/reception section 220 (transmission processing section 2211) may perform DFT processing as the transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, or otherwise, transmission/reception section 220 (transmission processing section 2211) may not perform DFT processing as the transmission processing.

The transmission/reception section 220 (RF section 222) may perform modulation, filtering, amplification, and the like for a baseband signal in a radio frequency band, and transmit a signal in the radio frequency band via the transmission/reception antenna 230.

On the other hand, the transmission/reception section 220 (RF section 222) may amplify, filter, demodulate a signal in a baseband signal with respect to a signal in a radio frequency band received by the transmission/reception antenna 230.

Transmission/reception section 220 (reception processing section 2212) may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filter processing, demapping, demodulation, decoding (including error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data.

The transceiver unit 220 (measurement unit 223) may also perform measurements related to the received signal. For example, the measurement unit 223 may also perform RRM measurement, CSI measurement, and the like based on the received signal. Measurement unit 223 may also measure for received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), and the like. The measurement result may also be output to the control unit 210.

The transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be configured by at least one of the transmitting/receiving unit 220, the transmitting/receiving antenna 230, and the transmission path interface 240.

Transmission/reception section 220 may also receive a transmission setting indication (TCI) state for a channel state information reference signal (CSI-RS) resource in a CSI-RS resource set to which Tracking Reference Signal (TRS) information is set, and control section 210 may also use the TCI state in reception of CSI-RS. The TCI status may also represent a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block.

The resource type of the CSI-RS resource set may also be aperiodic or periodic.

The SS/PBCH block may also belong to a non-serving cell.

At least one of the updating and the activating of the TCI status may also be performed by a medium access control-control element (MAC-CE) for the CSI-RS resource.

(hardware construction)

The block diagram used in the description of the above embodiment shows blocks in functional units. These functional blocks (structural units) are implemented by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by one apparatus that is physically or logically combined, or may be implemented by a plurality of apparatuses that are directly or indirectly (for example, by wire or wireless) connected to two or more apparatuses that are physically or logically separated. The functional blocks may also be implemented by combining the above-described apparatus or apparatuses with software.

Here, the functions include, but are not limited to, judgment, determination, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, establishment, comparison, assumption, expectation, view, broadcast (broadcasting), notification (notification), communication (communication), forwarding (forwarding), configuration (setting), reconfiguration (resetting), allocation (allocating, mapping), assignment (ordering), and the like. For example, a function block (a configuration unit) that realizes a transmission function may also be referred to as a transmission unit (transmitting unit), a transmitter (transmitter), or the like. Any of these methods is not particularly limited, as described above.

For example, the base station, the user terminal, and the like in one embodiment of the present disclosure may function as a computer that performs processing of the radio communication method of the present disclosure. Fig. 19 is a diagram showing an example of hardware configurations of a base station and a user terminal according to an embodiment. The base station 10 and the user terminal 20 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.

In addition, in the present disclosure, terms of devices, circuits, apparatuses, sections (sections), units, and the like can be substituted for one another. The hardware configuration of the base station 10 and the user terminal 20 may include one or more of the respective devices shown in the drawings, or may not include some of the devices.

For example, only one processor 1001 is illustrated, but there may be multiple processors. The processing may be executed by one processor, or may be executed by two or more processors simultaneously, sequentially, or by another method. Further, the processor 1001 may be implemented by one or more chips.

Each function of the base station 10 and the user terminal 20 is realized by, for example, reading specific software (program) into hardware such as the processor 1001 and the memory 1002, performing an operation by the processor 1001 to control communication via the communication device 1004, or controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a Central Processing Unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, at least a part of the control unit 110 (210), the transmission/reception unit 120 (220), and the like may be implemented by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes in accordance with them. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments may be used. For example, the control unit 110 (210) may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be similarly realized for other functional blocks.

The Memory 1002 may be a computer-readable recording medium, and may be formed of at least one of a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a Random Access Memory (RAM), or another suitable storage medium. The memory 1002 may also be referred to as a register, cache, main memory (primary storage), etc. The memory 1002 can store a program (program code), a software module, and the like that are executable to implement the wireless communication method according to the embodiment of the present disclosure.

The storage 1003 may be a computer-readable recording medium, and may be configured by at least one of a flexible disk (flexible Disc), a Floppy (registered trademark) disk, an optical disk (e.g., a Compact Disc read only memory (CD-ROM)) or the like), a digital versatile Disc (dvd), a Blu-ray (registered trademark) disk, a removable disk (removable Disc), a hard disk drive, a smart card, a flash memory device (e.g., a card (card), a stick (stick), a key drive), a magnetic stripe (stripe), a database, a server, or other suitable storage media. The storage 1003 may also be referred to as a secondary storage device.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. Communication apparatus 1004 may be configured to include a high-Frequency switch, a duplexer, a filter, a Frequency synthesizer, and the like, in order to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD), for example. For example, the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be implemented by the communication device 1004. The transmitting unit 120 (220) and the receiving unit 120b (220 b) may be physically or logically separated from each other.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) for receiving 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, or the like) that outputs to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

The processor 1001 and the memory 1002 are connected to each other via a bus 1007 for communicating information. The bus 1007 may be formed by a single (single) bus, or may be formed by different buses between the respective devices.

The base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), or the like, and a part or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may also be implemented using at least one of these hardware.

(modification example)

In addition, terms described in the present disclosure and terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, channels, symbols, and signals (signals or signaling) may be substituted for one another. Further, the signal may also be a message. The Reference Signal (Reference Signal) may also be referred to as RS for short, and may also be referred to as Pilot (Pilot), pilot Signal, etc. depending on the applied standard. Further, component Carriers (CCs) may also be referred to as cells, frequency carriers, carrier frequencies, and the like.

A radio frame may also be made up of one or more periods (frames) in the time domain. Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may also be composed of one or more slots in the time domain. The subframe may also be a fixed time length (e.g., 1 ms) independent of a parameter set (numerology).

Here, the parameter set may also refer to a communication parameter applied in at least one of transmission and reception of a certain signal or channel. For example, the parameter set may further indicate at least one of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission Time Interval (TTI), the number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

The time slot may also be formed of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM)) symbols, single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, or the like) in the time domain. Further, the time slot may also be a time unit based on a parameter set.

A timeslot may also contain multiple mini-slots. Each mini-slot may also be made up of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be made up of a fewer number of symbols than a slot. The PDSCH (or PUSCH) transmitted in a time unit larger than the mini slot may also be referred to as PDSCH (PUSCH) mapping type a. The PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (PUSCH) mapping type B.

The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. The radio frame, subframe, slot, mini-slot and symbol may also use other names corresponding to each. In addition, time units such as frames, subframes, slots, mini-slots, symbols, etc. in the present disclosure may be replaced with one another.

For example, one subframe may also be referred to as TTI, a plurality of consecutive subframes may also be referred to as TTI, and one slot or one mini-slot may also be referred to as TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms. The unit indicating TTI may be referred to as a slot, a mini slot, or the like, instead of a subframe.

Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (such as a frequency bandwidth and transmission power usable by each user terminal) to each user terminal in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a channel-coded data packet (transport block), code block, code word, or the like, or may be a processing unit of scheduling, link adaptation, or the like. When a TTI is given, a time interval (for example, the number of symbols) to which transport blocks, code blocks, codewords, and the like are actually mapped may be shorter than the TTI.

In addition, when one slot or one mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may be the minimum time unit for scheduling. The number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.

The TTI having the time length of 1ms may also be referred to as a normal TTI (TTI in 3gpp rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, a slot, and the like. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1ms, and a short TTI (e.g., a shortened TTI), may be replaced with a TTI having a TTI length smaller than the long TTI and equal to or longer than 1 ms.

A Resource Block (RB) is a Resource allocation unit in the time domain and the frequency domain, and may include one or more continuous subcarriers (subcarriers) in the frequency domain. The number of subcarriers included in an RB may be the same regardless of the parameter set, and may be 12, for example. The number of subcarriers included in the RB may also be decided based on the parameter set.

In addition, an RB may include one or more symbols in the time domain, and may have a length of one slot, one mini-slot, one subframe, or one TTI. One TTI, one subframe, and the like may be formed of one or more resource blocks.

One or more RBs may also be referred to as Physical Resource Blocks (PRBs), subcarrier groups (SCGs), resource Element Groups (REGs), PRB pairs, RB pairs, and the like.

Furthermore, a Resource block may also be composed of one or more Resource Elements (REs). For example, one RE may also be a radio resource region of one subcarrier and one symbol.

The Bandwidth Part (BWP) (which may be referred to as a partial Bandwidth) may also indicate a subset of consecutive common RBs (common resource blocks) for a certain parameter set in a certain carrier. Here, the common RB may also be determined by an index of an RB with reference to a common reference point of the carrier. PRBs may also be defined in a certain BWP and are numbered additionally within the BWP.

The BWP may include UL BWP (UL BWP) and DL BWP (DL BWP). For the UE, one or more BWPs may also be set within one carrier.

At least one of the set BWPs may be active, and the UE may not expect to transmit and receive a specific signal/channel other than the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be replaced with "BWP".

The above-described configurations of radio frames, subframes, slots, mini slots, symbols, and the like are merely examples. For example, the configuration such as the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, and the number of symbols, symbol length, cyclic Prefix (CP) length in a TTI can be variously changed.

The information, parameters, and the like described in the present disclosure may be expressed as absolute values, relative values to specific values, or other corresponding information. For example, the radio resource may also be indicated by a specific index.

In the present disclosure, the names used for the parameters and the like are not limitative names in all aspects. Further, the mathematical expressions and the like using these parameters may be different from those explicitly disclosed in the present disclosure. Various channels (PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and thus, the various names assigned to these various channels and information elements are not limitative names in all aspects.

Information, signals, and the like described in the present disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, and the like that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

Further, information, signals, and the like can be output in at least one direction of: from a higher layer (upper layer) to a lower layer (lower layer), and from a lower layer to a higher layer. Information, signals, and the like may be input and output via a plurality of network nodes.

The input/output information, signals, and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. The input/output information, signals, and the like may be overwritten, updated, or appended. The output information, signals, etc. may also be deleted. The input information, signals, etc. may also be transmitted to other devices.

The information notification is not limited to the embodiment and embodiment described in the present disclosure, and may be performed by other methods. For example, the Information notification in the present disclosure may be implemented by physical layer signaling (e.g., downlink Control Information (DCI)), uplink Control Information (UCI)), higher layer signaling (e.g., radio Resource Control (RRC)) signaling, broadcast Information (Master Information Block (MIB)), system Information Block (SIB)), or the like), medium Access Control (MAC) signaling), other signals, or a combination thereof.

The physical Layer signaling may also 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 also be referred to as 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. Further, the MAC signaling may be notified using a MAC Control Element (CE), for example.

Note that the notification of the specific information (for example, the notification of "X") is not limited to an explicit notification, and may be performed implicitly (for example, by not performing the notification of the specific information or by performing the notification of other information).

The decision may be made by a value (0 or 1) represented by one bit, by a true-false value (boolean value) represented by true (true) or false (false), or by a comparison of values (e.g., with a specific value).

Software, whether referred to as software (software), firmware (firmware), middleware-ware (middle-ware), microcode (micro-code), hardware description language, or by other names, should be construed broadly to mean instructions, instruction sets, code (code), code segments (code segments), program code (programcode), programs (program), subroutines (sub-program), software modules (software module), applications (application), software applications (software application), software packages (software packages), routines (routine), subroutines (sub-routine), objects (object), executables, threads of execution, procedures, functions, and the like.

Software, instructions, information, and the like may also be transmitted or received via a transmission medium. For example, where the software is transmitted from a website, server, or other remote source (remote source) using at least one of a wired technology (coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL)), and wireless technology (infrared, microwave, and so forth), the at least one of a wired technology and a wireless technology is included within the definition of transmission medium.

The terms "system" and "network" as used in this disclosure can be used interchangeably. "network" may also mean a device (e.g., a base station) included in a network.

In the present disclosure, terms such as "precoding (precoding)", "precoder (precoder)", "weight (precoding weight)", "Quasi-Co-Location (QCL))", "Transmission Configuration Indication state (TCI state)", "spatial relationship (spatial relationship)", "spatial domain filter (spatial domain filter)", "Transmission power", "phase rotation", "antenna port group", "layer", "rank", "resource set", "resource group", "beam width", "beam angle", "antenna element", "panel" can be used interchangeably.

In the present disclosure, terms such as "Base Station (BS)", "wireless Base Station", "fixed Station (fixed Station)", "NodeB", "eNB (eNodeB)", "gNB (gtnodeb)", "access Point (access Point)", "Transmission Point (TP)", "Reception Point (RP)", "Transmission Reception Point (TRP)", "panel", "cell", "sector", "cell group", "carrier", "component carrier" can be used interchangeably. There are also cases where a base station is referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (e.g., three) cells. When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also provide communication services through a base station subsystem (e.g., a small indoor base station (Remote Radio Head (RRH))). The term "cell" or "sector" refers to a portion or the entirety of the coverage area of at least one of the base stations and base station subsystems that is in communication service within the coverage area.

In the present disclosure, terms such as "Mobile Station (MS)", "User terminal (User terminal)", "User Equipment (UE))", "terminal" and the like can be used interchangeably.

There are also instances when a mobile station is referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset (hand set), user agent, mobile client, or several other suitable terms.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a wireless communication apparatus, and the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, a mobile body main body, or the like. The moving body may be a vehicle (e.g., a vehicle, an airplane, etc.), a moving body that moves in an unmanned manner (e.g., a drone (drone), an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.

In addition, the base station in the present disclosure may also be replaced with a user terminal. For example, the various aspects/embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of user terminals (e.g., which may also be referred to as Device-to-Device (D2D)), car networking (V2X), and the like). In this case, the user terminal 20 may have the functions of the base station 10 described above. Also, terms such as "upstream" and "downstream" may be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced with a side channel.

Likewise, the user terminal in the present disclosure may also be replaced with a base station. In this case, the base station 10 may have the functions of the user terminal 20 described above.

In the present disclosure, the operation performed by the base station is sometimes performed by an upper node (upper node) of the base station, depending on the case. Obviously, in a network including one or more network nodes (network nodes) having a base station, various operations performed for communication with a terminal may be performed by the base station, one or more network nodes other than the base station (for example, considering a Mobility Management Entity (MME), a Serving-Gateway (S-GW), etc., but not limited thereto), or a combination thereof.

The embodiments and modes described in the present disclosure may be used alone, may be used in combination, or may be switched to use with execution. Note that, the processing procedures, sequences, flowcharts, and the like of the embodiments and embodiments described in the present disclosure may be reversed in order unless contradictory. For example, elements of various steps are presented in an exemplary order for a method described in the present disclosure, but the present invention is not limited to the specific order presented.

The aspects/embodiments described in the present disclosure may also be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-a), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, fourth generation mobile communication system (4G)), fifth generation mobile communication system (5G), sixth generation mobile communication system (6G)), x generation mobile communication system (xG) (xG (x is, for example, an integer, a decimal)), future Radio Access (Future Access (FRA)), new Radio Access Technology (New-Radio Access (RAT (NR)), new radio access (NX)), new generation radio access (FX), global system for Mobile communications (GSM (registered trademark)), CDMA2000, ultra Mobile Broadband (UMB)), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra WideBand (UWB)), bluetooth (registered trademark), a system using other suitable radio communication methods, a next generation system extended based on them, and the like. Furthermore, multiple systems may also be applied in combination (e.g., LTE or LTE-a, combination with 5G, etc.).

The expression "based on" used in the present disclosure does not mean "based only on" unless otherwise specified. In other words, the recitation of "based on" means both "based only on" and "based at least on".

Any reference to the use of the terms "first," "second," etc. in this disclosure does not fully define the amount or order of such elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, reference to first and second elements does not mean that only two elements may be employed or that the first element must somehow override the second element.

The term "determining" used in the present disclosure may include various operations. For example, the "determination (decision)" may be a case where the "determination (decision)" is performed, such as determination (rounding), calculation (calculating), processing (processing), derivation (deriving), investigation (investigating), search (looking up), search, inquiry (querying)) (for example, search in a table, a database, or another data structure), confirmation (intercepting), or the like.

The "determination (decision)" may be a case where reception (e.g., reception information), transmission (e.g., transmission information), input (input), output (output), access (access) (e.g., access to data in a memory), and the like are regarded as "determination (decision)".

The "determination (decision)" may be a case where the solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like are regarded as the "determination (decision)" to be performed. That is, "judgment (decision)" may also be a case where some actions are regarded as being "judgment (decision)".

The "determination (decision)" may be replaced with "assumption", "expectation", "consideration", and the like.

The "maximum transmission power" described in the present disclosure may mean a maximum value of transmission power, may mean a nominal maximum transmission power (the nominal UE maximum transmit power), and may mean a nominal maximum transmission power (the rated UE maximum transmit power).

The terms "connected", "coupled", or any variant thereof, as used in this disclosure, mean all connections or couplings, direct or indirect, between two or more elements, and can encompass the presence of one or more intervening elements between two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination thereof. For example, "connect" may also be replaced with "access".

In the present disclosure, where two elements are connected, it is contemplated that they may be "connected" or "joined" to each other using more than one wire, cable, printed electrical connection, or the like, as well as using electromagnetic energy having wavelengths in the wireless frequency domain, the microwave region, the optical (both visible and invisible) region, or the like, as several non-limiting and non-limiting examples.

In the present disclosure, the term "a is different from B" may mean "a and B are different from each other". In addition, the term may also mean "a and B are different from C, respectively". The terms "separate", "combine", and the like are also to be construed as similar to "different".

In the present disclosure, when the terms "include", "including", and "including" and their modifications are used, these terms are intended to have inclusive meanings as similar to the terms "comprising". Further, the term "or" as used in this disclosure does not mean an exclusive or meaning.

In the present disclosure, for example, in the case where articles are added by translation as in a, an, and the in english, the present disclosure may also include the case where nouns following these articles are plural.

Although the invention according to the present disclosure has been described in detail above, it will be apparent to those skilled in the art that the invention according to the present disclosure is not limited to the embodiments described in the present disclosure. The invention according to the present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the invention defined by the claims. Therefore, the description of the present disclosure is for illustrative purposes and does not have any limiting meaning to the invention to which the present disclosure relates.

Claims (6)

1. A terminal, having:

a reception unit that receives a transmission setting indication (TCI) state for a channel state information reference signal (CSI-RS) resource within a CSI-RS resource set to which Tracking Reference Signal (TRS) information is set; and

a control unit to use the TCI state in reception of CSI-RS,

the TCI status represents a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block.

2. The terminal of claim 1, wherein,

the resource type of the CSI-RS resource set is aperiodic or periodic.

3. The terminal of claim 1 or claim 2,

the SS/PBCH block belongs to a non-serving cell.

4. The terminal of any one of claim 1 through claim 3,

at least one of the updating and the activating of the TCI status is performed through a medium access control-control element (MAC-CE) for the CSI-RS resource.

5. A wireless communication method of a terminal, comprising:

a step of receiving a transmission setting indication (TCI) state for a channel state information reference signal (CSI-RS) resource within a CSI-RS resource set to which Tracking Reference Signal (TRS) information is set; and

a step of using the TCI status in the reception of CSI-RS,

the TCI status represents a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block.

6. A base station, having:

a transmission unit that transmits a transmission setting indication (TCI) state for a channel state information reference signal (CSI-RS) resource within a CSI-RS resource set to which Tracking Reference Signal (TRS) information is set; and

a control unit which uses the TCI state in transmission of CSI-RS,

the TCI status represents a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block.

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