WO2021090369A1 - 端末及び無線通信方法 - Google Patents
端末及び無線通信方法 Download PDFInfo
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- WO2021090369A1 WO2021090369A1 PCT/JP2019/043313 JP2019043313W WO2021090369A1 WO 2021090369 A1 WO2021090369 A1 WO 2021090369A1 JP 2019043313 W JP2019043313 W JP 2019043313W WO 2021090369 A1 WO2021090369 A1 WO 2021090369A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
Definitions
- the present disclosure relates to terminals and wireless communication methods in next-generation mobile communication systems.
- LTE Long Term Evolution
- 3GPP Rel.10-14 LTE-Advanced (3GPP Rel.10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
- a successor system to LTE for example, 5th generation mobile communication system (5G), 5G + (plus), New Radio (NR), 3GPP Rel.15 or later, etc.) is also being considered.
- 5G 5th generation mobile communication system
- 5G + plus
- NR New Radio
- 3GPP Rel.15 or later, etc. is also being considered.
- UE User Equipment
- QCL Quad-Co-Location
- RS reference signal
- one of the purposes of the present disclosure is to provide a terminal and a wireless communication method for appropriately determining a reference signal for at least one of QCL and path loss calculation.
- the terminal is a pseudo-colocation (QCL) of a specific downlink resource if spatial relationship information is not set for at least one SRS resource in one or more sounding reference signal (SRS) resource sets. It has a control unit that uses the reference signal of the above for the spatial relationship of the target SRS resources in the one or more SRS resource sets, and a transmission unit that performs uplink transmission using the spatial relationship.
- QCL pseudo-colocation
- a reference signal for at least one of QCL and path loss calculation for uplink transmission can be appropriately determined.
- FIG. 1 is a diagram showing an example of a PDSCH QCL assumption.
- FIG. 2 is a diagram showing an example of the default spatial relationship of SRS.
- FIG. 3 is a diagram showing an example of the default spatial relationship of SRS according to one embodiment.
- FIG. 4 is a diagram showing an example of the relationship between the default spatial relationship and the path loss.
- FIG. 5 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 6 is a diagram showing an example of the configuration of the base station according to the embodiment.
- FIG. 7 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- FIG. 8 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- Transmission power control ⁇ Transmission power control for PUSCH>
- the transmission power of PUSCH is controlled based on the TPC command (also referred to as value, increase / decrease value, correction value), etc. indicated by the value of a predetermined field (also referred to as TPC command field, etc.) in DCI. ..
- the UE uses the index l of the parameter set (open loop parameter set) having the index j and the power control adjustment state (PUSCH power control adjustment state) to activate the carrier f of the serving cell c.
- the transmission power of PUSCH at the PUSCH transmission occasion (also referred to as transmission period, etc.) i (P PUSCH, b, f, c (i, j, q d , l)).
- the power control adjustment state may be referred to as a value based on the TPC command of the power control adjustment state index l, a cumulative value of the TPC command, or a value by a closed loop.
- l may be referred to as a closed loop index.
- the PUSCH transmission opportunity i is a period during which the PUSCH is transmitted, and may be composed of, for example, one or more symbols, one or more slots, and the like.
- PCMAX, f, c (i) is, for example, the transmission power (also referred to as maximum transmission power, UE maximum output power, etc.) of the user terminal set for the carrier f of the serving cell c in the transmission opportunity i. ..
- the PO_PUSCH, b, f, c (j) are, for example, parameters related to the target received power set for the active UL BWP b of the carrier f of the serving cell c at the transmission opportunity i (for example, parameters related to the transmission power offset, transmission). (Also referred to as power offset P0, target received power parameter, etc.).
- M PUSCH RB, b, f, c (i) is, for example, the number of resource blocks (bandwidth) allocated to the PUSCH for the transmission opportunity i in the active UL BWP b of the serving cell c and the carrier f of the subcarrier interval ⁇ . .. ⁇ b, f, c (j) are values provided by the upper layer parameters (eg, also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factors, etc.).
- the upper layer parameters eg, also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factors, etc.
- PL b, f, c are, for example, reference signals (reference signal (RS), path loss reference RS, path loss reference RS, path loss) associated with the active UL BWP b of the carrier f of the serving cell c.
- RS reference signal
- path loss reference RS path loss reference RS
- path loss path loss
- measuring DL-RS the pathloss calculated by the user terminal using the index q d of PUSCH-PathlossReferenceRS) (Papasurosu estimated [dB], a path loss compensation).
- a path loss reference RS eg, PUSCH-PathlossReferenceRS
- the UE will use a synchronization signal (SS) to obtain the Master Information Block (MIB).
- SS synchronization signal
- PL b, f, c (q d ) may be calculated using RS resources from the / physical broadcast channel (PBCH) block (SS block (SSB)).
- the UE configures a number of RS resource indexes up to the value of the maximum number of path loss reference RSs (eg, maxNrofPUSCH-PathlossReferenceRSs) and a set of respective RS settings for the RS resource index by the path loss reference RS.
- the set of RS resource indexes may include one or both of a set of SS / PBCH block indexes and a set of channel state information (CSI) -reference signal (RS) resource indexes.
- CSI channel state information
- RS reference signal
- the UE may use the same RS resource index q d as for the corresponding PRACH transmission.
- RAR Random Access Response
- the UE is provided with a PUSCH power control setting (eg, SRI-PUSCH-PowerControl) by a sounding reference signal (SRS) resource indicator (SRI) and is provided with one or more values of the ID of the path loss reference RS. If so, the mapping between the set of values for the SRI field in DCI format 0-1 and the set of ID values for the path loss reference RS can be mapped to higher layer signaling (eg, sri-PUSCH in SRI-PUSCH-PowerControl). -PowerControl-Id) may be obtained.
- the UE may determine the RS resource index q d from the ID of the path loss reference RS mapped to the SRI field value in DCI format 0_1 that schedules the PUSCH.
- the UE will not provide the PUCCH spatial relationship information.
- the same RS resource index q d as the PUCCH transmission in the resource may be used.
- PUSCH transmission is scheduled in DCI format 0_0 and the UE is not provided with spatial settings for PUCCH transmission, or PUSCH transmission is scheduled in DCI format 0_1 without SRI fields, or PUSCH power control by SRI. If the setting of is not provided to the UE, the UE may use the RS resource index q d with the ID of the zero path loss reference RS.
- the configuration grant setting eg ConfiguredGrantConfig
- the configuration grant setting includes a given parameter (eg rrc-CofiguredUplinkGrant)
- the RS resource index by the path loss reference index eg pathlossReferenceIndex
- q d may be provided to the UE.
- the UE For the PUSCH transmission set by the configuration grant setting, if the configuration grant setting does not include a given parameter, the UE will RS from the value of the path loss reference RS ID mapped to the SRI field in the DCI format that activates the PUSCH transmission.
- the resource index q d may be determined. If the DCI format does not include SRI fields, the UE may determine the RS resource index q d with the ID of a zero path loss reference RS.
- ⁇ TF, b, f, c are transmission power adjustment components (offset, transmission format compensation) for UL BWP b of the carrier f of the serving cell c.
- f b, f, c (i, l) are PUSCH power control adjustment states for the active UL BWP b of the carrier f of the serving cell c at the transmission opportunity i.
- f b, f, c (i, l) may be expressed by the equation (2).
- ⁇ PUSCH, b, f, c (i, l) are TPC command values included in DCI format 0_1 or DCI format 0_1 that schedule the PUSCH transmission opportunity i on the active UL BWP b of the carrier f of the serving cell c.
- RNTI Radio Network Temporary Identifier
- the UE performs the K PUSCH (ii 0 ) -1 symbol of the PUSCH transmission opportunity ii 0 and the PUSCH transmission opportunity on the active UL BWP b of the carrier f of the serving cell c with respect to the PUSCH power control adjustment state l. It may be a set of TPC command values received before and between the K PUSCH (i) symbol of i. i 0 is, PUSCH K PUSCH (ii 0) transmission opportunity ii 0 previous symbol is earlier than the pre-K PUSCH (i) symbols of the PUSCH transmission opportunity i, may be the smallest positive integer.
- the K PUSCH (i) is a serving cell after the last symbol of the corresponding PDCCH reception and before the first symbol of the PUSCH transmission. It may be the number of symbols in the active UL BWP b of the carrier f of c. If the PUSCH transmission is set by the configured grant configuration information (Configured GrantConfig ), the K PUSCH (i) is the number of symbols per slot N symb slot in the active UL BWP b of the carrier f of the serving cell c and the PUSCH common configuration information. It may be the number of K PUSCH, min symbols equal to the product of the minimum value provided by k2 in (PUSCH-ConfigCommon).
- the power control adjustment state may be set to have a plurality of states (for example, two states) or a single state depending on the upper layer parameter. Further, when a plurality of power control adjustment states are set, one of the plurality of power control adjustment states may be identified by the index l (for example, l ⁇ ⁇ 0,1 ⁇ ).
- equations (1) and (2) are merely examples and are not limited to these.
- the user terminal may control the transmission power of the PUSCH based on at least one parameter exemplified by the equations (1) and (2), may include additional parameters, or may include some parameters. It may be omitted. Further, in the above equations (1) and (2), the transmission power of the PUSCH is controlled for each active UL BWP of a certain carrier of a certain serving cell, but the present invention is not limited to this. At least a part of the serving cell, carrier, BWP, and power control adjustment state may be omitted.
- the transmission power of PUCCH is the TPC command (value, increase / decrease value, correction value), indicated value indicated by the value of a predetermined field (also referred to as TPC command field, first field, etc.) in DCI. , Etc.).
- the PUCCH transmission occasion (transmission period, etc.) for the active UL BWP b of the carrier f of the serving cell c.
- PUCCH transmission power in i P PUCCH, b, f , c (i, q u, q d, l)
- the power control adjustment state may be referred to as a value based on the TPC command of the power control adjustment state index l, a cumulative value of the TPC command, or a value by a closed loop.
- l may be referred to as a closed loop index.
- the PUCCH transmission opportunity i is a period during which the PUCCH is transmitted, and may be composed of, for example, one or more symbols, one or more slots, and the like.
- PCMAX, f, c (i) is, for example, the transmission power (also referred to as maximum transmission power, UE maximum output power, etc.) of the user terminal set for the carrier f of the serving cell c in the transmission opportunity i. .. P O_PUCCH, b, f, c (q u) , for example, parameters relating to the target received power is set for active UL BWP b of the carrier f of the serving cell c in the transmission opportunity i (e.g., parameters related to transmit power offset, It is also referred to as a transmission power offset P0 or a target reception power parameter).
- M PUCCH RB, b, f, c (i) is, for example, the number of resource blocks (bandwidth) allocated to the PUCCH for the transmission opportunity i in the active UL BWP b of the serving cell c and the carrier f of the subcarrier interval ⁇ . ..
- PL b, f, c (q d ) are, for example, reference signals for downlink BWP associated with the active UL BWP b of the carrier f of the serving cell c (path loss reference RS, path loss reference RS, path loss measurement DL-RS, path loss calculated by the user terminal using the index q d of PUCCH-PathlossReferenceRS) (pathloss estimation [dB], a path loss compensation).
- path loss reference RS path loss reference RS
- path loss measurement DL-RS path loss calculated by the user terminal using the index q d of PUCCH-PathlossReferenceRS
- pathloss estimation [dB] a path loss compensation
- the UE uses the RS resources obtained from the SS / PBCH block that the UE uses to obtain the MIB.
- the path loss PL b, f, c (q d ) is calculated using this.
- the UE is given path loss reference RS information (pathlossReferenceRSs in PUCCH-PowerControl) and is not given PUCCH spatial relation information (PUCCH-SpatialRelationInfo), the UE is given path loss reference RS information for PUCCH.
- the value of the reference signal in the PUCCH path loss reference RS from the PUCCH path loss reference RS-ID (PUCCH-PathlossReferenceRS-Id) having the index 0 in (PUCCH-PathlossReferenceRS) is acquired.
- the resource for this reference signal is either on the same serving cell or, if given, on the serving cell indicated by the value of pathlossReferenceLinking.
- the path loss reference association information indicates which DL, the special cell (SpCell) or the secondary cell (SCell) corresponding to this UL, is applied as the path loss reference by the UE.
- the SpCell may be a primary cell (PCell) in the master cell group (MCG) or a primary secondary cell (PSCell) in the secondary cell group (SCG).
- Path loss reference RS information indicates a set of reference signals (eg, CSI-RS configuration or SS / PBCH block) used for PUCCH path loss estimation.
- ⁇ F_PUCCH (F) is an upper layer parameter given for each PUCCH format.
- ⁇ TF, b, f, c (i) are transmission power adjustment components (offsets) for UL BWP b of the carrier f of the serving cell c.
- g b, f, c (i, l) are values based on the TPC command of the power control adjustment state index l of the active UL BWP of the carrier f of the serving cell c and the transmission opportunity i (for example, the power control adjustment state, TPC command). Cumulative value, closed loop value, PUCCH power adjustment state).
- g b, f, c (i, l) may be expressed by the equation (4).
- ⁇ PUCCH, b, f, c (i, l) are TPC command values, and the DCI format 1_0 or DCI format detected by the UE at the PUCCH transmission opportunity i of the active UL BWP b of the carrier f of the serving cell c. It may be encoded in combination with other TPC commands in DCI format 2_2 having a CRC included in 1-11, or scrambled by a particular RNTI (Radio Network Temporary Identifier) (eg, TPC-PUSCH-RNTI). ..
- RNTI Radio Network Temporary Identifier
- the UE performs the active UL BWP b of the carrier f of the serving cell c before the K PUCCH (ii 0 ) -1 symbol of the PUCCH transmission opportunity ii 0 and the PUSCH transmission opportunity i with respect to the PUCCH power control adjustment state l. It may be a set of TPC command values received before and between the K PUCCH (i) symbol of. i 0 is, PUSCH K PUCCH (ii 0) transmission opportunity ii 0 previous symbol is earlier than the pre-K PUCCH (i) symbols of the PUSCH transmission opportunity i, may be the smallest positive integer.
- the K PUCCH (i) is after the last symbol of the corresponding PDCCH reception and before the first symbol of the PUCCH transmission. , The number of symbols in the active UL BWP b of the carrier f of the serving cell c may be used. If the PUCCH transmission is set by the configured grant configuration information (Configured GrantConfig ), the K PUSCH (i) is the number of symbols per slot N symb slot in the active UL BWP b of the carrier f of the serving cell c and the PUSCH common configuration information. It may be the number of K PUCCH, min symbols equal to the product of the minimum value provided by k2 in (PUSCH-ConfigCommon).
- the UE obtains the TPC command value from DCI format 1_0 or 1-11, and if the UE is provided with PUCCH spatial relation information, the UE is set to P0 ID for PUCCH (p0-Set in PUCCH-PowerControl in PUCCH-Config).
- the index provided by p0-PUCCH-Id) in may provide a mapping between the PUCCH spatial relationship information ID (pucch-SpatialRelationInfoId) value and the closedLoopIndex (power adjustment state index l).
- the UE may determine the value of the closed loop index that provides the value of l through the link to the corresponding P0 ID for PUCCH. ..
- q u may be a PUCCH P0 ID (p0-PUCCH-Id) indicating a PUCCH P0 (P0-PUCCH) in the PUCCH P0 set (p0-Set).
- equations (3) and (4) are merely examples and are not limited to these.
- the user terminal may control the transmission power of the PUCCH based on at least one parameter exemplified by the equations (3) and (4), may include additional parameters, or may include some parameters. It may be omitted. Further, in the above equations (3) and (4), the transmission power of PUCCH is controlled for each active UL BWP of a certain carrier of a certain serving cell, but the present invention is not limited to this. At least a part of the serving cell, carrier, BWP, and power control adjustment state may be omitted.
- ⁇ Transmission power control for SRS> For example, the transmission of the SRS at the SRS transmission occasion (also referred to as the transmission period) i for the active UL BWP b of the carrier f of the serving cell c using the index l of the power control adjustment state.
- the electric power ( PSRS, b, f, c (i, q s , l)) may be expressed by the following equation (5).
- the power control adjustment state may be referred to as a value based on the TPC command of the power control adjustment state index l, a cumulative value of the TPC command, or a value by a closed loop. l may be referred to as a closed loop index.
- the SRS transmission opportunity i is a period during which the SRS is transmitted, and may be composed of, for example, one or more symbols, one or more slots, and the like.
- PCMAX, f, c (i) is, for example, the maximum UE output power for the carrier f of the serving cell c in the SRS transmission opportunity i.
- PO_SRS, b, f, c (q s ) are provided by p0 for the active UL BWP b of the carrier f of the serving cell c and the SRS resource set q s (provided by the SRS-ResourceSet and SRS-ResourceSetId). It is a parameter related to the target received power (for example, a parameter related to the transmission power offset, a transmission power offset P0, a target received power parameter, or the like).
- M SRS, b, f, c (i) is the SRS bandwidth represented by the number of resource blocks for the SRS transmission opportunity i on the active UL BWP b of the carrier f of the serving cell c and the subcarrier interval ⁇ .
- ⁇ SRS, b, f, c (q s ) are provided by ⁇ (eg, alpha) for the active UL BWP b of the serving cell c and the carrier f with the subcarrier spacing ⁇ , and the SRS resource set q s.
- PL b, f, c (q d ) are the DL path loss estimates [dB] calculated by the UE using the RS resource index q d for the active DL BWP of the serving cell c and the SRS resource set q s. ] (Path loss estimation [dB], path loss compensation).
- the RS resource index q d is a path loss reference RS associated with the SRS resource set q s (provided by path loss reference RS, path loss measurement DL-RS, eg pathlossReference RS) and SS / PBCH block index (s).
- ssb-Index or CSI-RS resource index (eg, csi-RS-Index).
- the UE uses the RS resources obtained from the SS / PBCH block that the UE uses to obtain the MIB. Use to calculate PL b, f, c (q d).
- h b, f, c (i, l) are SRS power control adjustment states for the active UL BWP of the carrier f of the serving cell c in the SRS transmission opportunity i. If the SRS power control adjustment state settings (eg, srs-PowerControlAdjustmentStates) indicate the same power control adjustment state for SRS and PUSCH transmissions, the current PUSCH power control adjustment states f b, f, c (i, l). ).
- SRS power control adjustment state settings eg, srs-PowerControlAdjustmentStates
- the SRS power control adjustment state setting indicates an independent power control adjustment state for SRS transmission and PUSCH transmission, and the TPC cumulative setting is not provided
- the SRS power control adjustment state h b, f, c ( i) may be expressed by the formula (6).
- the TPC command value having cardinality C (S i ) received by the UE between before the SRS (i-i 0 ) -1 symbol and before the K SRS (i) symbol of the SRS transmission opportunity i.
- i 0 is, SRS transmission K SRS (i-i 0) of the opportunity i-i 0 -1 preceding symbol is earlier than before K SRS (i) a symbol of the SRS transmission opportunity i, the minimum positive integer It may be.
- K SRS (i) is after the last symbol of the corresponding PDCCH that triggers the SRS transmission and before the first symbol of the SRS transmission.
- the number of symbols in the active UL BWP b of the carrier f of the serving cell c may be used.
- the K SRS (i) is the number of symbols per slot N symb slot in the active UL BWP b of the carrier f of the serving cell c.
- the number of K SRS, min symbols equal to the product of the minimum value provided by k2 in the PUSCH common configuration information (PUSCH-ConfigCommon).
- equations (5) and (6) are merely examples and are not limited to these.
- the user terminal may control the transmission power of the SRS based on at least one parameter exemplified by the equations (5) and (6), may include additional parameters, or may include some parameters. It may be omitted. Further, in the above equations (5) and (6), the transmission power of SRS is controlled for each BWP of a certain carrier of a certain cell, but the present invention is not limited to this. At least a part of the cell, carrier, BWP, and power control adjustment state may be omitted.
- reception processing for example, reception, demapping, demodulation, etc.
- transmission configuration indication state TCI state
- Controlling at least one of decoding and transmission processing eg, at least one of transmission, mapping, precoding, modulation, and coding
- the TCI state may represent what applies to the downlink signal / channel.
- the equivalent of the TCI state applied to the uplink signal / channel may be expressed as a spatial relation.
- the TCI state is information related to signal / channel pseudo collocation (Quasi-Co-Location (QCL)), and may be called spatial reception parameters, spatial relation information, or the like.
- the TCI state may be set in the UE on a channel-by-channel or signal-by-signal basis.
- QCL is an index showing the statistical properties of signals / channels. For example, when one signal / channel and another signal / channel have a QCL relationship, Doppler shift, Doppler spread, and average delay are performed between these different signals / channels. ), Delay spread, and spatial parameter (for example, spatial Rx parameter) can be assumed to be the same (QCL for at least one of these). You may.
- the spatial reception parameter may correspond to the received beam of the UE (for example, the received analog beam), or the beam may be specified based on the spatial QCL.
- the QCL (or at least one element of the QCL) in the present disclosure may be read as sQCL (spatial QCL).
- QCL types A plurality of types (QCL types) may be specified for the QCL.
- QCL types AD QCL types with different parameters (or parameter sets) that can be assumed to be the same may be provided, and the parameters (may be referred to as QCL parameters) are shown below:
- QCL Type A QCL-A
- QCL-B Doppler shift and Doppler spread
- QCL type C QCL-C
- QCL-D Spatial reception parameter.
- the UE may assume that a given control resource set (Control Resource Set (CORESET)), channel or reference signal has a specific QCL (eg, QCL type D) relationship with another CORESET, channel or reference signal.
- QCL assumption QCL assumption
- the UE may determine at least one of the transmission beam (Tx beam) and the reception beam (Rx beam) of the signal / channel based on the TCI state of the signal / channel or the QCL assumption.
- the TCI state may be, for example, information about the QCL of the target channel (in other words, the reference signal (Reference Signal (RS)) for the channel) and another signal (for example, another RS). ..
- the TCI state may be set (instructed) by higher layer signaling, physical layer signaling, or a combination thereof.
- the upper layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
- RRC Radio Resource Control
- MAC Medium Access Control
- MAC CE MAC Control Element
- PDU MAC Protocol Data Unit
- the broadcast information includes, for example, a master information block (Master Information Block (MIB)), a system information block (System Information Block (SIB)), a minimum system information (Remaining Minimum System Information (RMSI)), and other system information ( Other System Information (OSI)) may be used.
- MIB Master Information Block
- SIB System Information Block
- RMSI Minimum System Information
- OSI Other System Information
- the physical layer signaling may be, for example, downlink control information (DCI).
- DCI downlink control information
- the channels for which the TCI state or spatial relationship is set are, for example, a downlink shared channel (Physical Downlink Shared Channel (PDSCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), and an uplink shared channel (Physical Uplink Shared). It may be at least one of a Channel (PUSCH)) and an uplink control channel (Physical Uplink Control Channel (PUCCH)).
- PDSCH Physical Downlink Shared Channel
- PDCH Downlink Control Channel
- PUSCH Physical Uplink Control Channel
- PUCCH Physical Uplink Control Channel
- the RS having a QCL relationship with the channel is, for example, a synchronization signal block (Synchronization Signal Block (SSB)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a measurement reference signal (Sounding). It may be at least one of Reference Signal (SRS)), CSI-RS for tracking (also referred to as Tracking Reference Signal (TRS)), and reference signal for QCL detection (also referred to as QRS).
- SSB Synchronization Signal Block
- CSI-RS Channel State Information Reference Signal
- Sounding Sounding
- SRS Reference Signal
- TRS Tracking Reference Signal
- QRS reference signal for QCL detection
- the SSB is a signal block including at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)), a secondary synchronization signal (Secondary Synchronization Signal (SSS)), and a broadcast channel (Physical Broadcast Channel (PBCH)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- PBCH Physical Broadcast Channel
- the SSB may be referred to as an SS / PBCH block.
- the information element of the TCI state (“TCI-state IE” of RRC) set by the upper layer signaling may include one or more QCL information (“QCL-Info”).
- the QCL information may include at least one of information related to the RS having a QCL relationship (RS-related information) and information indicating the QCL type (QCL type information).
- RS-related information includes RS index (for example, SSB index, non-zero power CSI-RS (Non-Zero-Power (NZP) CSI-RS) resource ID (Identifier)), cell index where RS is located, and RS position.
- Information such as the index of the Bandwidth Part (BWP) to be used may be included.
- both QCL type A RS and QCL type D RS, or only QCL type A RS can be set for the UE.
- TRS When TRS is set as the RS of QCL type A, it is assumed that the same TRS is periodically transmitted over a long period of time, unlike the PDCCH or PDSCH demodulation reference signal (DeModulation Reference Signal (DMRS)). Will be done.
- DMRS DeModulation Reference Signal
- the UE can measure the TRS and calculate the average delay, delay spread, and so on.
- a UE in which the TRS is set as the QCL type A RS in the TCI state of the PDCCH or PDSCH DMRS has the same parameters (average delay, delay spread, etc.) of the PDCCH or PDSCH DMRS and the TRS QCL type A. Since it can be assumed that there is, the parameters (average delay, delay spread, etc.) of DMRS of PDCCH or PDSCH can be obtained from the measurement result of TRS.
- the UE can perform more accurate channel estimation by using the measurement result of the TRS.
- a UE set with a QCL type D RS can determine a UE reception beam (spatial domain reception filter, UE spatial domain reception filter) using the QCL type D RS.
- a TCI-state QCL type X RS may mean an RS that has a QCL type X relationship with a channel / signal (DMRS), and this RS is called the TCI-state QCL type X QCL source. You may.
- DMRS channel / signal
- TCI state for PDCCH Information about the PDCCH (or DMRS antenna port associated with the PDCCH) and the QCL with a given RS may be referred to as the TCI state for the PDCCH and the like.
- the UE may determine the TCI state for the UE-specific PDCCH (CORESET) based on the upper layer signaling. For example, for the UE, one or more (K) TCI states may be set by RRC signaling for each CORESET.
- CORESET UE-specific PDCCH
- the UE may activate one of the plurality of TCI states set by RRC signaling for each CORESET by MAC CE.
- the MAC CE may be called a TCI state indicating MAC CE (TCI State Indication for UE-specific PDCCH MAC CE) for UE-specific PDCCH.
- the UE may monitor the CORESET based on the active TCI state corresponding to the CORESET.
- TCI state for PDSCH Information about the PDSCH (or DMRS antenna port associated with the PDSCH) and the QCL with a given DL-RS may be referred to as the TCI state for the PDSCH and the like.
- the UE may notify (set) M (M ⁇ 1) TCI states (QCL information for M PDSCHs) for PDSCH by higher layer signaling.
- the number M of TCI states set in the UE may be limited by at least one of the UE capability and the QCL type.
- the DCI used for scheduling the PDSCH may include a predetermined field indicating the TCI state for the PDSCH (for example, it may be called a TCI field, a TCI state field, or the like).
- the DCI may be used for scheduling the PDSCH of one cell, and may be called, for example, DL DCI, DL assignment, DCI format 1_0, DCI format 1-1-1 and the like.
- Whether or not the TCI field is included in the DCI may be controlled by the information notified from the base station to the UE.
- the information may be information indicating whether or not a TCI field exists in DCI (present or present) (for example, TCI existence information, TCI existence information in DCI, upper layer parameter TCI-PresentInDCI).
- the information may be set in the UE by, for example, higher layer signaling.
- TCI states When more than 8 types of TCI states are set in the UE, 8 or less types of TCI states may be activated (or specified) using MAC CE.
- the MAC CE may be referred to as a UE-specific PDSCH TCI state activation / deactivation MAC CE (TCI States Activation / Deactivation for UE-specific PDSCH MAC CE).
- TCI States Activation / Deactivation for UE-specific PDSCH MAC CE The value of the TCI field in DCI may indicate one of the TCI states activated by MAC CE.
- the UE When the UE sets the TCI existence information set to "enabled” for the CORESET that schedules the PDSCH (CORESET used for the PDCCH transmission that schedules the PDSCH), the UE is set to the TCI field. It may be assumed that it exists in the DCI format 1-11 of the PDCCH transmitted on the CORESET.
- the UE uses the TCI state or QCL assumption for the PDSCH to determine the QCL of the PDSCH antenna port for the PDCCH transmission that schedules the PDSCH. It may be assumed that it is the same as the TCI state or QCL assumption applied to.
- the TCI presence information is set to "enabled"
- the TCI field in the DCI in the component carrier (CC) that schedules (PDSCH) will be in the activated TCI state in the scheduled CC or DL BWP.
- the UE uses a TCI that has a DCI and follows the value of the TCI field in the detected PDCCH to determine the QCL of the PDSCH antenna port. May be good.
- the UE performs the PDSCH of the serving cell. It may be assumed that the DM-RS ports are RSs and QCLs in the TCI state with respect to the QCL type parameters given by the indicated TCI state.
- the indicated TCI state may be based on the activated TCI state in the slot with the scheduled PDSCH. If the UE is configured with multiple slot PDSCHs, the indicated TCI state may be based on the activated TCI state in the first slot with the scheduled PDSCH, and the UE may span the slots with the scheduled PDSCH. You may expect them to be the same. If the UE is configured with a CORESET associated with a search space set for cross-carrier scheduling, the UE will set the TCI presence information to "valid" for that CORESET and for the serving cell scheduled by the search space set. If at least one of the TCI states set in is containing a QCL type D, the UE may assume that the time offset between the detected PDCCH and the PDSCH corresponding to that PDCCH is greater than or equal to the threshold. Good.
- the DL DCI In the RRC connection mode, the DL DCI (PDSCH) is set both when the TCI information in the DCI (upper layer parameter TCI-PresentInDCI) is set to "enabled” and when the TCI information in the DCI is not set. If the time offset between the receipt of the scheduled DCI) and the corresponding PDSCH (the PDSCH scheduled by the DCI) is less than the threshold, the UE will force the PDSCH DM-RS port of the serving cell to the serving cell.
- One or more CORESETs in the active BWP have the smallest (lowest) CORESET-ID in the latest (latest) slot monitored by the UE and are in the monitored search space.
- the associated CORESET is an RS and a QCL with respect to the QCL parameters used to indicate the QCL of the PDCCH (FIG. 1).
- This RS may be referred to as the PDSCH default TCI state or the PDSCH default QCL assumption.
- the time offset between the reception of the DL DCI and the reception of the PDSCH corresponding to the DCI may be referred to as a scheduling offset.
- the above thresholds are QCL time duration, "timeDurationForQCL”, “Threshold”, “Threshold for offset between a DCI indicating a TCI state and a PDSCH scheduled by the DCI", “Threshold-Sched-Offset”. , Schedule offset threshold, scheduling offset threshold, and the like.
- the QCL time length may be based on the UE capability, for example, the delay required for PDCCH decoding and beam switching.
- the QCL time length may be the minimum time required for the UE to perform PDCCH reception and application of spatial QCL information received in the DCI for PDSCH processing.
- the QCL time length may be represented by the number of symbols for each subcarrier interval, or may be represented by the time (for example, ⁇ s).
- the QCL time length information may be reported from the UE to the base station as UE capability information, or may be set in the UE from the base station using higher layer signaling.
- the UE may assume that the DMRS port of the PDSCH is a DL-RS and QCL based on the TCI state activated for the CORESET corresponding to the minimum CORESET-ID.
- the latest slot may be, for example, a slot that receives the DCI that schedules the PDSCH.
- the CORESET-ID may be an ID (ID for identifying the CORESET) set by the RRC information element "ControlResourceSet”.
- the delay from PDCCH to PDSCH is for QCL. If it is shorter than the time length, or if the TCI state is not in the DCI for the scheduling, the UE will from the active TCI state that is applicable to the PDSCH in the active BWP of the scheduled cell and has the lowest ID. QCL assumptions for the scheduled PDSCH of may be acquired.
- the UE may set parameters (PUCCH setting information, PUCCH-Config) used for PUCCH transmission by higher layer signaling (for example, Radio Resource Control (RRC) signaling).
- PUCCH setting information may be set for each partial band (for example, an uplink bandwidth part (BWP)) in a carrier (also referred to as a cell or a component carrier (CC)).
- BWP uplink bandwidth part
- CC component carrier
- the PUCCH setting information may include a list of PUCCH resource set information (for example, PUCCH-ResourceSet) and a list of PUCCH spatial relation information (for example, PUCCH-SpatialRelationInfo).
- PUCCH resource set information for example, PUCCH-ResourceSet
- PUCCH spatial relation information for example, PUCCH-SpatialRelationInfo
- the PUCCH resource set information may include a list (for example, resourceList) of the PUCCH resource index (ID, for example, PUCCH-ResourceId).
- the UE when the UE does not have the individual PUCCH resource setting information (for example, the individual PUCCH resource configuration) provided by the PUCCH resource set information in the PUCCH setting information (before RRC setup), the UE is a system.
- the PUCCH resource set may be determined based on the parameters (for example, pucch-ResourceCommon) in the information (for example, System Information Block Type 1 (SIB1) or Remaining Minimum System Information (RMSI)).
- SIB1 System Information Block Type 1
- RMSI Remaining Minimum System Information
- the UE may determine the PUCCH resource set according to the number of UCI information bits. Good.
- the UE is determined by the value of a predetermined field (eg, PUCCH resource indicator field) in the Downlink Control Information (DCI) (eg, DCI format 1_0 or 1-1-1 used for PDSCH scheduling).
- DCI Downlink Control Information
- CCE number in a control resource set for PDCCH receiving carrying the DCI (cOntrol rEsource sET (CORESET) ) and (n CCE)
- the One PUCCH resource (index) in the PUCCH resource set may be determined based on at least one.
- the PUCCH spatial relationship information may indicate a plurality of candidate beams (spatial domain filters) for PUCCH transmission.
- the PUCCH spatial relationship information may indicate the spatial relationship between RS (Reference signal) and PUCCH.
- the list of PUCCH spatial relation information may include some elements (PUCCH spatial relation information IE (Information Element)).
- Each PUCCH spatial relationship information includes, for example, an index of PUCCH spatial relationship information (ID, for example, pucch-SpatialRelationInfoId), an index of a serving cell (ID, for example, servingCellId), and information related to RS (reference RS) having a spatial relationship with PUCCH. At least one may be included.
- the information about the RS may be an SSB index, a CSI-RS index (for example, NZP-CSI-RS resource configuration ID), or an SRS resource ID and a BWP ID.
- the SSB index, CSI-RS index and SRS resource ID may be associated with at least one of the beams, resources and ports selected by the corresponding RS measurement.
- the UE When more than one spatial relation information about PUCCH is set, the UE has one at a certain time based on PUCCH spatial relation activation / deactivation MAC CE (PUCCH spatial relation Activation / Deactivation MAC CE).
- PUCCH spatial relation activation / deactivation MAC CE PUCCH spatial relation activation / Deactivation MAC CE
- One PUCCH spatial relationship information may be controlled to be active for the PUCCH resource.
- the MAC CE may include information such as a serving cell ID ("Serving Cell ID” field), a BWP ID (“BWP ID” field), and a PUCCH resource ID (“PUCCH Resource ID” field) to be applied.
- a serving cell ID (“Serving Cell ID” field)
- BWP ID BWP ID
- PUCCH resource ID PUCCH Resource ID
- the UE if the field of a certain S i indicates 1, activate the spatial relationship information of the spatial relationship information ID # i.
- the UE if the field of a certain S i indicates 0, deactivation of the spatial relationship information of the spatial relationship information ID # i.
- the UE may activate the PUCCH-related information specified by the MAC CE 3 ms after transmitting an acknowledgment (ACK) to the MAC CE that activates the predetermined PUCCH spatial-related information.
- ACK acknowledgment
- the UE receives information (SRS setting information, for example, a parameter in "SRS-Config" of the RRC control element) used for transmitting a measurement reference signal (for example, a sounding reference signal (SRS)).
- SRS setting information for example, a parameter in "SRS-Config" of the RRC control element
- SRS sounding reference signal
- the UE has information about one or more SRS resource sets (SRS resource set information, for example, "SRS-ResourceSet” of RRC control element) and information about one or more SRS resources (SRS resource).
- SRS resource set information for example, "SRS-ResourceSet” of RRC control element
- SRS resource information about one or more SRS resources
- Information for example, at least one of the RRC control elements "SRS-Resource" may be received.
- One SRS resource set may be associated with a predetermined number of SRS resources (a predetermined number of SRS resources may be grouped).
- Each SRS resource may be specified by an SRS resource identifier (SRS Resource Indicator (SRI)) or an SRS resource ID (Identifier).
- SRI SRS Resource Indicator
- SRS resource ID Identifier
- the SRS resource set information may include information on the SRS resource set ID (SRS-ResourceSetId), a list of SRS resource IDs (SRS-ResourceId) used in the resource set, the SRS resource type, and the usage of the SRS.
- SRS-ResourceSetId information on the SRS resource set ID
- SRS-ResourceId list of SRS resource IDs
- the SRS resource types are periodic SRS (Periodic SRS (P-SRS)), semi-persistent SRS (Semi-Persistent SRS (SP-SRS)), and aperiodic SRS (Aperiodic SRS (A-SRS, AP)).
- P-SRS Period SRS
- SP-SRS semi-persistent SRS
- Aperiodic SRS Aperiodic SRS
- AP aperiodic SRS
- -SRS periodic SRS
- the UE may transmit P-SRS and SP-SRS periodically (or periodically after activation), and may transmit A-SRS based on DCI's SRS request.
- the applications are, for example, beam management, codebook-based transmission (codebook: CB), and non-codebook-based transmission. (NonCodebook: NCB), antenna switching, and the like may be used.
- SRS for codebook-based or non-codebook-based transmission may be used to determine a precoder for codebook-based or non-codebook-based PUSCH transmission based on SRI.
- the UE determines a precoder for PUSCH transmission based on SRI, transmission rank indicator (Transmitted Rank Indicator: TRI), and transmission precoding matrix indicator (Transmitted Precoding Matrix Indicator: TPMI). You may.
- the UE may determine a precoder for PUSCH transmission based on SRI.
- the SRS resource information includes SRS resource ID (SRS-ResourceId), number of SRS ports, SRS port number, transmission comb, SRS resource mapping (for example, time and / or frequency resource position, resource offset, resource cycle, number of repetitions, SRS).
- SRS resource ID SRS-ResourceId
- number of SRS ports SRS port number
- transmission comb SRS resource mapping (for example, time and / or frequency resource position, resource offset, resource cycle, number of repetitions, SRS).
- SRS resource mapping for example, time and / or frequency resource position, resource offset, resource cycle, number of repetitions, SRS.
- the number of symbols, SRS bandwidth, etc. may be included.
- the spatial relationship information of the SRS may indicate the spatial relationship information between the predetermined reference signal and the SRS.
- the predetermined reference signal includes a synchronization signal / broadcast channel (Synchronization Signal / Physical Broadcast Channel: SS / PBCH) block, a channel state information reference signal (Channel State Information Reference Signal: CSI-RS), and an SRS (for example, another SRS). It may be at least one of.
- the SS / PBCH block may be referred to as a synchronous signal block (SSB).
- the SRS spatial relationship information may include at least one of the SSB index, the CSI-RS resource ID, and the SRS resource ID as the index of the predetermined reference signal.
- the SSB index, SSB resource ID, and SSBRI may be read as each other. Further, the CSI-RS index, the CSI-RS resource ID and the CRI (CSI-RS Resource Indicator) may be read as each other. Further, the SRS index, SRS resource ID and SRI may be read as each other.
- the SRS spatial relationship information may include a serving cell index, a BWP index (BWP ID), and the like corresponding to the above-mentioned predetermined reference signal.
- BC means, for example, a node (for example, a base station or a UE) determines a beam (transmission beam, Tx beam) used for signal transmission based on a beam (reception beam, Rx beam) used for signal reception. It may be the ability to do.
- Tx beam transmission beam
- Rx beam reception beam
- BC is transmission / reception beam correspondence (Tx / Rx beam correspondence), beam reciprocity (beam reciprocity), beam calibration (beam calibration), calibrated / uncalibrated (Calibrated / Non-calibrated), reciprocity calibration. It may be called reciprocity calibrated / non-calibrated, degree of correspondence, degree of agreement, and the like.
- the UE uses the same beam (spatial domain transmission filter) as the SRS (or SRS resource) instructed by the base station based on the measurement results of one or more SRS (or SRS resources).
- Upstream signals eg, PUSCH, PUCCH, SRS, etc. may be transmitted.
- the UE uses the same or corresponding beam (spatial domain transmission filter) as the beam (spatial domain reception filter) used for receiving a predetermined SSB or CSI-RS (or CSI-RS resource). Then, an uplink signal (for example, PUSCH, PUCCH, SRS, etc.) may be transmitted.
- a predetermined SSB or CSI-RS or CSI-RS resource
- the UE When the UE sets spatial relation information about SSB or CSI-RS and SRS for a certain SRS resource (for example, when BC is present), the UE is a spatial domain for receiving the SSB or CSI-RS.
- the SRS resource may be transmitted using the same spatial domain filter (spatial domain transmit filter) as the filter (spatial domain receive filter). In this case, the UE may assume that the SSB or CSI-RS UE receive beam and the SRS UE transmit beam are the same.
- the reference SRS When the UE is set spatial relationship information regarding another SRS (reference SRS) and the SRS (target SRS) for one SRS (target SRS) resource (for example, in the case of no BC), the reference SRS is set.
- the target SRS resource may be transmitted using the same spatial domain filter (spatial domain transmission filter) as the spatial domain filter (spatial domain transmission filter) for transmission of. That is, in this case, the UE may assume that the UE transmission beam of the reference SRS and the UE transmission beam of the target SRS are the same.
- the UE may determine the spatial relationship of the PUSCH scheduled by the DCI based on the value of a predetermined field (eg, the SRS resource identifier (SRI) field) in the DCI (eg DCI format 0_1). Specifically, the UE may use the spatial relationship information of the SRS resource (for example, “spatialRelationInfo” of the RRC information element) determined based on the value of the predetermined field (for example, SRI) for PUSCH transmission.
- a predetermined field eg, the SRS resource identifier (SRI) field
- SRI spatialRelationInfo
- the UE When codebook-based transmission is used for PUSCH, the UE may set two SRS resources by RRC and indicate one of the two SRS resources by DCI (a predetermined field of 1 bit). When using non-codebook-based transmission for PUSCH, the UE may have four SRS resources set by RRC and one of the four SRS resources indicated by DCI (a 2-bit predetermined field). .. In order to use a spatial relationship other than the two or four spatial relationships set by the RRC, it is necessary to reset the RRC.
- the DL-RS can be set for the spatial relationship of SRS resources used for PUSCH.
- the UE can set the spatial relationship of a plurality of (for example, up to 16) SRS resources by RRC, and can instruct one of the plurality of SRS resources by MAC CE.
- DCI format 0_1 contains SRI, while DCI format 0_1 does not include SRI.
- the UE for PUSCH on a cell scheduled by DCI format 0_0, the UE, if available, is the space corresponding to the dedicated PUCCH resource with the lowest ID in the active UL BWP of that cell.
- the PUSCH is transmitted according to the relationship.
- the individual PUCCH resource may be a PUCCH resource set individually for the UE (set by the upper layer parameter PUCCH-Config).
- PUSCH cannot be scheduled in DCI format 0_0 for cells for which PUCCH resources are not set (for example, secondary cells (SCell)).
- PUCCH on SCell PUCCH transmitted on SCell
- PUCCH on SCell PUCCH transmitted on SCell
- PUCCH on SCell UCI will be transmitted on PCell.
- PUCCH on SCell UCI is transmitted on PUCCH-SCell. Therefore, the PUCCH resource and spatial relation information are not required to be set in all SCells, and there may be cells in which the PUCCH resource is not set.
- DCI format 0_1 includes a carrier indicator field (CIF), but DCI format 0_1 does not include CIF. Therefore, even if the PUCCH resource is set for the PCell, the cross-carrier scheduling of the PUSCH on the SCell cannot be performed by the DCI format 0_0 on the PCell.
- CIF carrier indicator field
- usage 'beamManagement'
- FR frequency range
- the default spatial relationship may be the PDSCH default TCI state or the default QCL assumption.
- SRS-ResourceSet SRS resource set having an antenna switching use
- usage 'antennaSwitching'
- Such SRS transmission is used to determine the DL precoder. If different spatial relationships are applied to multiple SRS resources in the SRS resource set, the base station will not be able to properly determine the DL precoder. Therefore, the same spatial relationship should be applied to the transmission of SRS.
- the default spatial relationship differs for each slot.
- the default spatial relationship of SRS1 in one slot is TCI1 of CORESET1
- the default spatial relationship of SRS2 in another slot is CORESET2. It is considered to be TCI2.
- the base station cannot properly determine the DL precoder. If the DL precoder is not determined properly, system performance may decrease, such as a decrease in throughput.
- the UE sets the upper layer parameter (usage) in the SRS-ResourceSet to'antennaSwitching', then the UE is an indicated (reported) UE capability (UE).
- One of the following settings 1 to 5 may be set depending on the antenna switching capability information, the UE capability information indicating the SRS transmission port switching pattern supported by the UE, and supportedSRS-TxPortSwitch).
- the UE antenna switching capability, indicated by the supportedSRS-TxPortSwitch as xTyR (or txry), corresponds to a UE capable of SRS transmission on x antenna ports across y antennas in total. y corresponds to all or a subset of UE receiving antennas. 2T4R is two pairs of antennas.
- Each set has two SRS resources transmitted under different symbols, each SRS resource in a given set consists of a single SRS port, and the SRS port of the second resource in the set is the same set. It is associated with a UE antenna port that is different from the SRS port of the first resource in.
- Each SRS resource set has two SRS resources transmitted under different symbols, each SRS resource in a given set consists of two SRS ports, and the SRS port pair of the second resource in the set is the same. It is associated with a different UE antenna port pair than the SRS port pair of the first resource in the set.
- Resource type (upper layer parameter resourceType) in the SRS resource set that has four SRS resources transmitted in different symbols for 1T4R and is set periodically or semi-persistent. Set to 0 or 1 SRS resource set. Each SRS resource in a given set consists of a single SRS port, and each resource's SRS port is associated with a different UE antenna port.
- the resource type (upper layer parameter resourceType) in the SRS resource set that has a total of 4 SRS resources transmitted in different symbols in 2 different slots and is set aperiodically. 0 or 2 SRS resource sets, respectively, set.
- the SRS port of each SRS resource in the given two sets is associated with a different UE antenna port.
- Each of the two sets is set with two SRS resources, or one set is set with one SRS resource and the other set is set with three SRS resources.
- the UE expects that both of the two sets be set to the same value of the power control parameters (upper layer parameters alpha, p0, pathlossReferenceRS, and srs-PowerControlAdjustmentStates) in the SRS resource set.
- the UE has the same value of the parameter (upper layer parameter aperiodicSRS-ResourceTrigger, parameter indicating the code point of the SRS request field in DCI) in each SRS resource set, and the value of the upper layer parameter slotOffset in each SRS resource set. Expect to be different.
- the UE When a set of SRS resources is transmitted in the same slot as the Y symbol, the UE is set to a guard period for the Y symbol, which the UE does not transmit any other symbol.
- the guard period is between the SRS resources of the set.
- the UE If the indicated UE capability is 1T4R / 2T4R, the UE expects to be configured with the same number of SRS ports of 1 or 2 for all SRS resources in the SRS resource set.
- the UE has more than one SRS resource set with the usage set for antenna switching (upper layer parameter usage) in the same slot. Do not expect to be set or triggered. If the indicated UE capability is 1T1R or 2T2R or 4T4R, the UE sets or triggers more than one SRS resource set with the usage set for antenna switching (upper layer parameter usage) at the same symbol. I don't expect that.
- the UE determines the DL precoder for y UE receiving antennas of the UE from the SRS based on the channel reciprocity (beam correspondence). , It is necessary to transmit SRS using each of a plurality of SRS resources. For example, a UE whose UE antenna switching capability information is 1T4R can use four receiving antennas and can transmit SRS on one antenna port. If the base station determines the DL precoder for the UE's four UE-received antennas based on the SRS on one of the UE's antenna ports, the UE uses the four SRS resources to transmit the SRS. There is a need. When the UE transmits SRS using a plurality of SRS resources in a plurality of SRS resource sets, if the spatial relationship is different among the plurality of SRS resources, the base station may not be able to appropriately determine the DL precoder.
- the UE is from the SS / PBCH block that the UE uses to get the MIB.
- the obtained RS resource may be used for path loss calculation.
- the SS / PBCH block is not transmitted in a specific cell (for example, SCell), or a case where the SS / PBCH block used by the UE to acquire the MIB is not in the specific cell.
- a specific cell for example, SCell
- the RS used for path loss calculation cannot be determined appropriately. If the RS used for path loss calculation is not properly determined, system performance may deteriorate, such as a decrease in throughput.
- the present inventors have conceived a method for appropriately determining a reference signal for at least one of QCL and path loss calculation for uplink transmission.
- the cell, CC, carrier, BWP, and band may be read as each other.
- index, ID, indicator, and resource ID may be read as each other.
- the specific UL transmission, the specific UL signal, the specific type of UL transmission, the specific UL channel, PUSCH, PUCCH, SRS, P-SRS, SP-SRS, and A-SRS may be read as each other.
- a specific DL signal, a specific DL resource, a specific type of DL transmission, a specific DL transmission, a specific DL reception, a specific DL channel, PDSCH, PDCCH, CORESET, DL-RS, SSB, and CSI-RS are read as each other. You may.
- the RS of the QCL type D assumed to be the state or the QCL, and the RS of the QCL type A assumed to be the TCI state or the QCL may be read as each other.
- the QCL type D RS, the DL-RS associated with the QCL type D, the DL-RS having the QCL type D, the DL-RS source, the SSB, and the CSI-RS may be read interchangeably.
- the TCI state is information about a receive beam (spatial domain receive filter) instructed (set) to the UE (for example, DL-RS, QCL type, cell to which DL-RS is transmitted, etc.). You may.
- a QCL assumption is based on the transmission or reception of an associated signal (eg, PRACH) and is transmitted by an information (eg, DL-RS, QCL type, DL-RS) about a receive beam (spatial domain receive filter) assumed by the UE. It may be a cell, etc.).
- the latest slot, the most recent slot, the latest search space, and the latest search space may be read as each other.
- RS, DL-RS, QCL assumption, SRI, spatial relationship based on SRI, UL TCI may be read as each other.
- the RS for the QCL parameter given by, the TCI state of the particular DL signal or the RS of the QCL type D in the QCL assumption, the spatial relationship of the reference UL transmission may be read interchangeably.
- the UE transmits a specific UL transmission according to the default spatial relationship
- the UE uses the default spatial relationship for the spatial relationship of the specific UL transmission
- the UE defaults to the spatial relationship of the specific UL transmission.
- “Assuming (assuming) that the RS of the spatial relationship is the same” and "The UE assumes that the spatial relationship of the specific UL transmission is the same as the RS of the QCL type D of the default spatial relationship (assuming)” are mutually exclusive. It may be read as.
- the TRS, the CSI-RS for tracking, the CSI-RS having the TRS information (upper layer parameter trs-Info), and the NZP-CSI-RS resource having the TRS information in the NZP-CSI-RS resource set are mutually exclusive. It may be read as.
- DCI format 0_0 DCI without SRI, DCI without spatial indication, and DCI without CIF may be read as each other.
- DCI format 0_1 DCI including SRI, DCI including spatially related instructions, and DCI including CIF may be read interchangeably.
- path loss reference RS path loss reference RS
- path loss estimation RS path loss calculation RS
- path loss calculation RS pathloss (PL) -RS, index q d , RS used for path loss calculation, RS resource used for path loss calculation, calculation.
- RS may be read interchangeably. Calculation, estimation, and measurement may be read as each other.
- the UE may apply the default spatial relationship to the spatial relationship of a particular UL transmission.
- the specific UL transmission may be at least one of PUSCH, PUCCH, SRS, P-SRS, SP-SRS, and A-SRS.
- the default spatial relationship application conditions are that the spatial relationship information for the specific UL transmission is not set, that the specific UL transmission is within the frequency range (for example, frequency range (FR) 2), and that the specific UL transmission is used for beam management (for example, the specific UL transmission is used for beam management.
- the spatial relationship information for the specific UL transmission may be the spatial relationship information in the individual PUCCH setting or the individual SRS setting.
- the associated CSI-RS may be the ID (index) of the CSI-RS resource associated with the SRS resource set in non-codebook-based transmission.
- the default spatial relationship application condition may include that the path loss reference RS is not set for the specific UL transmission.
- the default spatial relationship application condition may include that the path loss reference RS is not set by higher layer signaling for a particular UL transmission.
- the default spatial relationship application condition may include that only one TCI state is active for PDCCH (the number of active TCI states for PDCCH is 1). This default spatial relationship application condition simplifies UE operation.
- the default spatial relationship application condition may include that only one TCI state is active for PDCCH and PDSCH (the number of active TCI states for PDCCH and PDSCH is 1). UE operation is simplified when using a single active beam for UL and DL.
- the default spatial relationship application condition may include that the PDCCH and the PUCCH scheduled by the PDCCH are in the same BWP or the same CC (cross-carrier scheduling is not used).
- cross-carrier scheduling the UE may not always be able to apply the same beam to the PDCCH and PUCCH, so excluding cross-carrier scheduling simplifies UE operation.
- CA inter-band carrier aggregation
- it is conceivable that different beams are applied to PDCCH and PUCCH.
- FR1-FR2 CA if DCI is in FR1 and PUCCH or SRS or PUSCH is in FR2, it is considered that the UE cannot determine the beam.
- the default spatial relationship application condition may include that interband CA is not used.
- the default spatial relationship application condition may include that there is no SRI for the specific UL transmission PUSCH.
- the default spatial relationship application condition may include that there is no SRS resource corresponding to the SRI for PUSCH.
- the default spatial relationship application condition may include that spatial relationship information is not set for at least one SRS resource in the SRS resource set.
- the default spatial relationship may be the RS of the QCL of the specific DL resource.
- the RS of the QCL of the specific DL resource, the default TCI state or default QCL assumption of the specific DL resource, the TCI state of the CORESET with the lowest CORESET ID in the recent slot, and one or more CORESETs in the active BWP of the serving cell are the UE.
- QCL assumption, TCI state or QCL assumption of specific CORESET, DL signal corresponding to specific UL transmission for example, DL channel that triggers specific UL transmission, DL channel that schedules specific UL transmission, DL channel that corresponds to specific UL transmission
- the RS related to the QCL parameter of the specific DL resource, and the RS of the QCL for the specific DL resource may be read as each other.
- the RS of the default spatial relationship or the default TCI state or the default QCL assumption may be a QCL type D RS or a QCL type A RS, and if applicable, a QCL type D RS or a QCL type A RS. It may be RS.
- the latest slot may be the latest slot for a specific DL resource.
- the latest slot may be the latest slot for (or before) the start symbol of a particular UL transmission.
- the latest slot may be the latest slot (before the symbol) for the first or last symbol of the DL signal corresponding to the specific UL transmission.
- the DL signal corresponding to the specific UL transmission may be PDSCH corresponding to PUCCH (PDSCH corresponding to HARQ-ACK carried on PUCCH).
- the specific UL transmission may be a PUSCH scheduled in DCI format 0_0.
- the specific UL transmission is performed by DCI format 0_0 when a PUCCH resource having a spatial relationship (for example, an active spatial relationship) (for example, a dedicated PUCCH resource) is not set in the active UL BWP of the cell. It may be a scheduled PUSCH on the cell.
- a PUCCH resource having a spatial relationship for example, an active spatial relationship
- a dedicated PUCCH resource for example, a dedicated PUCCH resource
- the default spatial relationship may be any of the following default spatial relationships 1-5.
- the default spatial relationship may be the PDSCH default TCI state or the default QCL assumption.
- the default spatial relationship may be the PDSCH default TCI state or the PDSCH default QCL assumption. If a COREST is set on a CC to which a default spatial relationship applies, the PDSCH default TCI state or PDSCH default QCL assumption is the lowest COSET ID of the most recent slot or recent search space. It may be the TCI state corresponding to. If no CORESET is set on the CC to which the default spatial relationship applies, the PDSCH default TCI state or the PDSCH default QCL assumption is applicable to the PDSCH in the active DL BWP of the CC and has the lowest ID. It may be in an activated TCI state.
- the specific DL resource may be PDSCH.
- the default spatial relationship may be one of the active TCI states (activated TCI states) of CORESET.
- TCI states may be active for CORESET.
- the active TCI state selected as the default spatial relationship may be the default RS, the default TCI state, or the default QCL assumption.
- the specific DL resource may be PDCCH.
- the default spatial relationship of the specific UL transmission is in the TCI state of the PDCCH.
- the specific UL transmission may be an A-SRS triggered by the PDCCH or a PUCCH carrying HARQ-ACK for the PDCCH scheduled by the PDCCH.
- the PDCCH corresponding to the specific UL transmission may be a PDCCH that triggers A-SRS.
- the PDCCH corresponding to the specific UL transmission may be a PDCCH that schedules the PDSCH and indicates the timing of the HARQ-ACK of the PDSCH.
- the default spatial relationship may be the above-mentioned default spatial relationship 1.
- the specific DL resource may be PDCCH or PDSCH.
- the default spatial relationship may be a QCL assumption of CORESET # 0 (CORESET having an ID of 0).
- the specific DL resource may be CORESET # 0.
- the default spatial relationship may be the path loss reference RS.
- the default spatial relationship may be RS used for path loss calculation.
- the RS used for the path loss calculation, the RS resource used for the path loss calculation, and the calculated RS may be read as each other.
- the calculated RS may be an RS resource obtained from the SS / PBCH block used by the UE to acquire the MIB.
- the calculated RS may be a path loss reference RS.
- pathlossReferenceRSs pathlossReferenceRS information for a particular UL transmission is not given, or if the UE is not given individual upper layer parameters, the calculated RS is the SS / PBCH used by the UE to acquire the MIB. It may be an RS resource obtained from the block.
- the calculated RS may be a path loss reference RS having an index of 0 in the path loss reference RS information (list of path loss reference RSs). For example, if the UE is given path loss reference RS information (pathlossReferenceRSs in PUCCH-PowerControl) and is not given PUCCH spatial relation information (PUCCH-SpatialRelationInfo), the calculated RS is the path loss for PUCCH. It may be a reference signal in the PUCCH path loss reference RS from the PUCCH path loss reference RS-ID (PUCCH-PathlossReferenceRS-Id) having an index 0 in the reference RS information (PUCCH-PathlossReferenceRS).
- PUCCH path loss reference RS-ID PUCCH path loss reference RS-ID
- the UE may use the calculated RS for the default spatial relationship of the specific UL transmission.
- the UE may use the set path loss reference RS for the default spatial relationship of the specific UL transmission.
- the specific DL resource may be a path loss reference RS.
- the specific UL transmission may be an SRS based on an SRS resource set for antenna switching applications.
- the UE may determine the default spatial relationship based on a specific time resource.
- the UE may determine the default spatial relationship of SRS using the SRS resource of the specific time resource in the specific UL transmission.
- the specific time resource may be a specific slot.
- the specific time resource may include at least one of a subframe, a slot, a subslot, and a symbol.
- the UE may determine the default TCI state or the default QCL assumption of the PDSCH in the specific slot as the default spatial relationship of the SRS in the specific slot.
- the UE may determine the default spatial relationship of the specific UL transmission based on the specific slot.
- the UE may use the default spatial relationship of SRS that uses the SRS resource of the specific slot for the spatial relationship of SRS that uses the SRS resource of the slot other than the specific slot in the same SRS resource set.
- the UE may transmit SRS using SRS resources in the SRS resource set for antenna switching over a plurality of slots.
- the UE may transmit a plurality of SRSs each using a plurality of SRS resources in the SRS resource set for antenna switching over a plurality of slots.
- the specific UL transmission may be an SRS transmission using a plurality of SRS resources over a plurality of slots in a plurality of SRS resource sets for antenna switching use.
- the UE may determine the default spatial relationship based on a particular slot.
- the UE may determine a default spatial relationship for a particular UL transmission based on a particular slot.
- the UE determines the default spatial relationship of SRS that uses the SRS resource of the specific slot in the specific UL transmission, and uses the determined default spatial relationship with other SRS resources in the same SRS resource set in the specific UL transmission. It may be used for the spatial relationship between the SRS and the SRS that uses the SRS resource in another SRS resource set in the specific UL transmission.
- a specific UL transmission is an SRS transmission that uses a plurality of SRS resources across multiple slots in a plurality of SRS resource sets having an application set for antenna switching and a resource type set aperiodic. May be good.
- a specific UL transmission may be an SRS transmission that uses multiple SRS resources across multiple slots in multiple SRS resource sets with an application set for antenna switching and a resource type set periodically. Good.
- Specific UL transmissions are SRS transmissions that use multiple SRS resources across multiple slots in multiple SRS resource sets with applications set for antenna switching and resource types set for semi-persistent. There may be.
- the specific UL transmission may be an SRS transmission using multiple SRS resources across multiple slots in a plurality of SRS resource sets with uses set for antenna switching when the UE capability supportedSRS-TxPortSwitch exhibits 1T4R. .. Specific UL transmissions are multiple slots in multiple SRS resource sets with uses set for antenna switching and resource types set aperiodic when the UE capability supportedSRS-TxPortSwitch exhibits 1T4R. It may be an SRS transmission using a plurality of SRS resources spanning. Specific UL transmissions are transmitted in different symbols in two different slots, the application set for antenna switching and the resource type set aperiodic when the UE capability supportedSRS-TxPortSwitch exhibits 1T4R. It may be an SRS transmission using two SRS resource sets having a total of four SRS resources.
- Specific UL transmission provides multiple SRS resources across multiple slots in multiple SRS resource sets with uses set for antenna switching when the number of antenna ports x is less than the number of antennas y in the UE capability supportedSRS-TxPortSwitch. It may be the SRS transmission to be used.
- the specific UL transmission has a plurality of uses set for antenna switching and a resource type set aperiodically when the number of antenna ports x is less than the number of antennas y in the UE capability supportedSRS-TxPortSwitch. It may be an SRS transmission using a plurality of SRS resources over a plurality of slots in the SRS resource set.
- the specific slot may be one of the following specific slots 1 and 2.
- the specific slot may be the slot of the SRS resource transmitted first or last in the SRS resource set for antenna switching use.
- the UE transmits SRS1 and SRS2 in one SRS resource set across a plurality of slots.
- the default spatial relationship of SRS1 transmitted in the slot of the first SRS resource in the SRS resource set is TCI1 of CORESET1
- the default spatial relationship of SRS2 transmitted in the subsequent slots is the same as the default spatial relationship of SRS1. It may be.
- the specific slot may be the slot of the SRS resource transmitted first or last among the plurality of SRS resource sets transmitted by the specific UL.
- the specific slot may be the slot of the SRS resource having the lowest ID or the highest ID in the SRS resource set for antenna switching use.
- the default spatial relationship of SRS1 transmitted in the slot of the SRS resource having the lowest ID in the SRS resource set is TCI1 of CORESET1
- the default spatial relationship of SRS2 using other SRS resources is the default spatial relationship of SRS1. It may be the same.
- the specific slot may be the slot of the SRS resource having the lowest ID or the highest ID in the SRS resource set having the lowest ID or the highest ID in the specific UL transmission.
- the UE can use the same spatial relationship for the plurality of SRSs.
- the UE may apply the default spatial relationship to the target SRS resource in the SRS resource set. If the spatial relationship information is not set for at least one SRS resource in the SRS resource set having a specific use, the UE may apply the default spatial relationship to the target SRS resource in the SRS resource set. ..
- the specific application may be antenna switching.
- the specific use may be codebook-based transmission (codebook) or non-codebook-based transmission (nonCodebook).
- codebook codebook
- nonCodebook non-codebook-based transmission
- the UE may apply the default spatial relationship of the target SRS resource to the PUSCH. If the SRI field in the DCI that schedules the PUSCH indicates the target SRS resource, the UE may apply the default spatial relationship to the PUSCH.
- the target SRS resource may be one of the following target SRS resources 1 and 2.
- Target SRS resource 1 When spatial relation information is not set for some SRS resources in the SRS resource set, the target SRS resource may be the SRS resource.
- Target SRS resource 2 When spatial relation information is not set for some SRS resources in the SRS resource set, the target SRS resource may be all SRS resources in the SRS resource set. In this case, the UE may apply the default spatial relationship to all the SRS resources of the SRS resource set regardless of whether or not the spatial relationship information is set for each SRS resource of the SRS resource set.
- Multiple SRS resources in the same SRS resource set may have different time resources.
- the UE may determine the default spatial relationship based on one of the following time resources 1 and 2 in the plurality of SRS resources.
- the time resource may include at least one of a subframe, a slot, a subslot, and a symbol.
- the UE If spatial relation information is not set for some SRS resources in the SRS resource set, the UE defaults to the corresponding SRS resource based on the time resource (transmission timing) of each SRS resource in the SRS resource set. Spatial relationships may be determined.
- the UE may use the PDSCH default TCI state or default QCL assumption in each SRS resource for the default spatial relationship of the corresponding SRS resource.
- the UE When spatial relation information is not set for some SRS resources in the SRS resource set, the UE performs the default space of each SRS resource based on the time resource (transmission timing) of the specific SRS resource in the SRS resource set. The relationship may be determined.
- the specific SRS resource includes an SRS resource having the lowest ID, an SRS resource having the highest ID, an SRS resource transmitted first, an SRS resource transmitted last, and an SRS resource having the lowest frequency resource in the SRS resource set. It may be any of the SRS resources having the highest frequency resource.
- the specific SRS resource is the SRS resource having the lowest ID, the SRS resource having the highest ID, the SRS resource transmitted first, and the SRS resource transmitted last among the SRS resource sets in which the spatial relationship information in the SRS resource set is not set. It may be either an SRS resource, an SRS resource having the lowest frequency resource, or an SRS resource having the highest frequency resource.
- the UE uses the PDSCH default TCI state or default QCL assumption for a particular SRS resource in the SRS resource set as the default spatial relationship for each SRS resource in the SRS resource set. You may.
- the UE even if the spatial relationship information is not set for at least one SRS resource in the SRS resource set, the UE still uses the spatial relationship of the SRS resources in the SRS resource set. Can be determined appropriately.
- the UE may use the calculation RS for the path loss calculation for the specific UL transmission of the specific cell.
- the calculated RS application condition may include that the UE is not given (not set) pathlossReferenceRSs, or before the UE is given individual upper layer parameters.
- the calculation RS application condition may include that the UE is not given (not set) pathlossreference RSs for a particular UL transmission of a particular cell, or before the UE is given an individual upper layer parameter.
- the calculation RS application condition is that the UE is given path loss reference RS information (eg, pathlossReferenceRSs in PUCCH-PowerControl) and is not given PUCCH spatial relation information (eg, PUCCH-SpatialRelationInfo). May include.
- path loss reference RS information eg, pathlossReferenceRSs in PUCCH-PowerControl
- PUCCH spatial relation information eg, PUCCH-SpatialRelationInfo
- the calculated RS may be an RS resource obtained from the SS / PBCH block used by the UE to acquire the MIB.
- the SS / PBCH block used by the UE to acquire the MIB may be received in the first cell.
- the specific cell may be at least one of the first cell and the second cell.
- the first cell may be a PCell or a SpCell.
- the second cell may be a SCell or a cell other than the first cell.
- the first cell is the cell or BWP that receives the SS / PBCH block used by the UE to acquire the MIB, the cell or BWP that receives the SS / PBCH block, or the cell or BWP, SS / to which the SS / PBCH block is transmitted. It may be read as a cell or BWP in which a PBCH block is set.
- the SS / PBCH block used to acquire the MIB is in the CC or BWP of the first cell, the SS / PBCH block is received in the CC or BWP of the first cell, the SS / PBCH block is the first
- the transmission in the CC or BWP of the cell and the setting of the SS / PBCH block for the CC or BWP of the first cell may be read interchangeably.
- the UE may determine the calculation RS according to any of the following specific cell RS determination methods 1 to 4.
- Specific cell RS determination method 1 If the calculation RS application condition is satisfied, the UE may use the same calculation RS for the path loss calculation of all cells. For example, if the calculation RS application condition is satisfied, the UE may use the calculation RS of the first cell for the path loss calculation (for the specific UL transmission of all cells) of all cells.
- the UE may use the calculation RS for the path loss calculation of the first cell. For example, if the calculation RS application condition is met, if the SS / PBCH block used to acquire the MIB is in the CC or BWP of the first cell, the UE will perform the calculation RS in the first cell (first cell). It may be used for path loss calculation (for cell specific UL transmission).
- the UE uses the spatial DL RS in the second cell (CC in the second cell) for the path loss calculation (for the specific UL transmission in the second cell) in the second cell. You may.
- the UE may use the calculation RS for the path loss calculation of the first cell. For example, if the calculation RS application condition is met, if the SS / PBCH block used to acquire the MIB is in the CC or BWP of the first cell, the UE will perform the calculation RS in the first cell (first cell). It may be used for path loss calculation (for cell specific UL transmission).
- the UE may use the path loss reference RS set or updated by MAC CE for the path loss calculation (for the specific UL transmission of the second cell) in the second cell. If the calculation RS application condition is satisfied and the path loss reference RS for the second cell is not set or updated by MAC CE, the spatial DL RS in the second cell (CC of the second cell) is set to the path loss of the second cell. It may be used for calculation.
- the UE can appropriately determine the calculation RS.
- Specific cell RS determination method 4 If the calculation RS application condition is satisfied, the UE may use the RS of the default spatial relationship of the specific UL transmission for the path loss calculation for the specific UL transmission of the specific cell. For example, if the calculation RS application condition is satisfied, the UE may use the PDSCH default TCI state or QCL assumption for path loss calculation for a particular UL transmission of a particular cell.
- ⁇ Calculation RS within the path loss calculation period> The UE measures the reference signal received power (RSRP) of the path loss reference RS for the path loss calculation over the path loss calculation period (long interval, longer than the slot, sufficient time for the path loss calculation). .. If the calculated RS is spatially related (eg, using the specific cell RS determination method 4 described above), the calculated RS will be slot dependent and the UE will not be able to measure the same RS over the path loss calculation period. there is a possibility.
- RSRP reference signal received power
- the UE may use the calculation RS for the path loss calculation for the specific UL transmission.
- the UE may determine the calculation RS according to any of the following specific section RS determination methods 1 to 3.
- the calculated RS may be an RS resource obtained from the SS / PBCH block used by the UE to acquire the MIB.
- the calculated RS when the path loss reference RS information is set may be a path loss reference RS having an index 0 in the path loss reference RS information.
- the calculated RS is a reference signal in the PUCCH path loss reference RS from the PUCCH path loss reference RS-ID (PUCCH-PathlossReferenceRS-Id) having an index 0 in the PUCCH path loss reference RS information (PUCCH-PathlossReferenceRS). You may.
- the path loss reference RS for the specific UL transmission does not change with the spatial relationship of the specific UL transmission, so that the UE can appropriately calculate the path loss.
- the calculated RS may be the default path loss reference RS.
- the default path loss reference RS may be the TCI state of CORESET with the lowest or highest ID, RS with the ID specified by the condition, or the path loss reference with the ID specified by the condition. It may be RS.
- the ID specified by the condition may be 0, the lowest ID, or the highest ID.
- the default path loss reference RS may be the default TCI state in the slot specified by the condition (eg, the default TCI state of the PDSCH in the slot specified by the condition or the QCL assumption).
- the slot specified by the condition may be the first slot of the subframe or the last slot of the subframe.
- the calculated RS may differ depending on the default TCI state of the PDSCH.
- at least one of the power control parameters (P0, ⁇ , TPC command state for closed loop (power control adjustment state)) other than the path loss reference RS may differ depending on the default TCI state of PDSCH, for example.
- the UE may use the power control parameters associated with the PDSCH default TCI state for transmit power control of a particular UL transmission.
- the UE may use the default path loss reference RS for the path loss calculation for the specific UL transmission. This makes it possible to prevent the calculated RS from changing in a time-dependent manner even when the default spatial relationship changes in a time-dependent manner.
- this RS determination method it is possible to prevent the calculated RS from changing frequently depending on the time, and the UE can measure the RSRP over a long interval.
- Specific section RS determination method 3 If the default spatial relationship application condition is met and the calculated RS application condition is met, the UE may use the calculated RS for path loss calculation for a particular UL transmission.
- the calculated RS may be the default spatial relationship for a particular UL transmission.
- the UE may calculate the path loss using a plurality of samples of the calculation RS within the path loss calculation period. For example, the UE may calculate the path loss based on the average value of a plurality of RSRPs obtained from a plurality of samples of the calculated RSs within the path loss calculation period.
- the UE may calculate the path loss according to at least one of the following path loss calculation methods 1 to 3.
- the number of samples used for path loss calculation in the case where the calculation RS has a default spatial relationship may be smaller than the number of samples used for path loss calculation other than the case.
- the length of the time (path loss calculation period) used for the path loss calculation in the case may be shorter than the length of the time (path loss calculation period) used for the path loss calculation other than the case.
- the UE may calculate the path loss using L1-RSRP (for example, one L1-RSRP) in the case where the calculation RS has a default spatial relationship.
- L1-RSRP for example, one L1-RSRP
- the path loss may be calculated using the RSRP of the RS. Even when the calculated RS in the path loss calculation period becomes a plurality of RSs (changes to different RSs), the UE may calculate the path loss using RSRPs obtained from the plurality of RSs. For example, the UE may calculate path loss using the average of multiple RSRPs obtained from multiple RSs.
- the UE may use the path loss obtained from the same RS as the default spatial relationship for the transmission power control.
- the UE may use the path loss obtained from the same RS as the default spatial relationship of the specific UL transmission for the transmission power control of the specific UL transmission.
- the UE may calculate the path loss for each TCI state and determine the path loss used for the transmission power control of the specific UL transmission according to the TCI state related to the default space of the specific UL transmission.
- the default spatial relationship is the default TCI state of PDSCH, TCI1 is set for CORESET1, and TCI2 is set for subsequent CORESET2.
- the UE uses TCI1 as the default spatial relationship for transmission of the specific UL transmission 1 and TCI2 as the default spatial relationship for transmission of the specific UL transmission 2.
- the UE calculates and holds (maintains) path loss 1 based on the RSRP of RS of TCI1, and the UE calculates and holds (maintains) path loss 2 based on RSRP of RS of TCI2.
- the UE uses the path loss 1 based on the TCI1 for the transmission power control of the specific UL transmission 1.
- the UE uses the path loss 2 based on the TCI2 for the transmission power control of the specific UL transmission 2.
- the UE can simultaneously maintain path loss calculations that exceed the maximum number of path loss reference RSs per cell (eg maxNrofPUSCH-PathlossReferenceRSs, maxNrofPUCCH-PathlossReferenceRSs) for certain types of UL transmissions (eg PUSCH, PUCCH, SRS). You don't have to expect it.
- the number of TCI states (TCI state of CORESET, active TCI state of PDCCH) corresponds to the number of path loss reference RSs. Therefore, when the number of TCI states exceeds the maximum number of path loss reference RSs, the UE determines.
- the TCI state may be selected in order from the smallest CORESET ID or TCI ID (in ascending order of CORESET ID or TCI ID).
- the UE may control the transmission power of the specific UL transmission using the path loss.
- the UE may control the transmission power of the specific UL transmission using the path loss. If the RS used for path loss calculation for specific UL transmission is not the default spatial relation RS, the UE uses the path loss calculated from the SS / PBCH block used to acquire the MIB to transmit power for specific UL transmission. Control may be performed. If the RS of the default spatial relationship is not the RS used to calculate the path loss for the specific UL transmission, the UE uses the path loss calculated from the SS / PBCH block used to acquire the MIB to transmit the power of the specific UL transmission. Control may be performed.
- wireless communication system Wireless communication system
- communication is performed using any one of the wireless communication methods according to each of the above-described embodiments of the present disclosure or a combination thereof.
- FIG. 5 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by Third Generation Partnership Project (3GPP). ..
- the wireless communication system 1 may support dual connectivity between a plurality of Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), and dual connectivity between NR and LTE (NR-E).
- -UTRA Dual Connectivity (NE-DC) may be included.
- the LTE (E-UTRA) base station (eNB) is the master node (Master Node (MN)), and the NR base station (gNB) is the secondary node (Secondary Node (SN)).
- the base station (gNB) of NR is MN
- the base station (eNB) of LTE (E-UTRA) is SN.
- the wireless communication system 1 has dual connectivity between a plurality of base stations in the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )) May be supported.
- a plurality of base stations in the same RAT for example, dual connectivity (NR-NR Dual Connectivity (NN-DC)) in which both MN and SN are NR base stations (gNB). )
- NR-NR Dual Connectivity NR-DC
- gNB NR base stations
- the wireless communication system 1 includes a base station 11 that forms a macro cell C1 having a relatively wide coverage, and a base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. You may prepare.
- the user terminal 20 may be located in at least one cell. The arrangement, number, and the like of each cell and the user terminal 20 are not limited to the mode shown in the figure.
- the base stations 11 and 12 are not distinguished, they are collectively referred to as the base station 10.
- the user terminal 20 may be connected to at least one of the plurality of base stations 10.
- the user terminal 20 may use at least one of carrier aggregation (Carrier Aggregation (CA)) and dual connectivity (DC) using a plurality of component carriers (Component Carrier (CC)).
- CA Carrier Aggregation
- DC dual connectivity
- CC Component Carrier
- Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
- the macro cell C1 may be included in FR1 and the small cell C2 may be included in FR2.
- FR1 may be in a frequency band of 6 GHz or less (sub 6 GHz (sub-6 GHz)), and FR2 may be in a frequency band higher than 24 GHz (above-24 GHz).
- the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a frequency band higher than FR2.
- the user terminal 20 may perform communication using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the plurality of base stations 10 may be connected by wire (for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (for example, NR communication).
- wire for example, optical fiber compliant with Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication for example, when NR communication is used as a backhaul between base stations 11 and 12, the base station 11 corresponding to the higher-level station is an Integrated Access Backhaul (IAB) donor, and the base station 12 corresponding to a relay station (relay) is IAB. It may be called a node.
- IAB Integrated Access Backhaul
- relay station relay station
- the base station 10 may be connected to the core network 30 via another base station 10 or directly.
- the core network 30 may include at least one such as Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the user terminal 20 may be a terminal that supports at least one of communication methods such as LTE, LTE-A, and 5G.
- a wireless access method based on Orthogonal Frequency Division Multiplexing may be used.
- OFDM Orthogonal Frequency Division Multiplexing
- DL Downlink
- UL Uplink
- CP-OFDM Cyclic Prefix OFDM
- DFT-s-OFDM Discrete Fourier Transform Spread OFDM
- OFDMA Orthogonal Frequency Division Multiple. Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the wireless access method may be called a waveform.
- another wireless access system for example, another single carrier transmission system, another multi-carrier transmission system
- the UL and DL wireless access systems may be used as the UL and DL wireless access systems.
- downlink shared channels Physical Downlink Shared Channel (PDSCH)
- broadcast channels Physical Broadcast Channel (PBCH)
- downlink control channels Physical Downlink Control
- Channel PDCCH
- the uplink shared channel Physical Uplink Shared Channel (PUSCH)
- the uplink control channel Physical Uplink Control Channel (PUCCH)
- the random access channel shared by each user terminal 20 are used.
- Physical Random Access Channel (PRACH) Physical Random Access Channel or the like may be used.
- User data, upper layer control information, System Information Block (SIB), etc. are transmitted by PDSCH.
- User data, upper layer control information, and the like may be transmitted by the PUSCH.
- the Master Information Block (MIB) may be transmitted by the PBCH.
- Lower layer control information may be transmitted by PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information of at least one of PDSCH and PUSCH.
- DCI Downlink Control Information
- the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
- the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
- the PDSCH may be read as DL data
- the PUSCH may be read as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space (search space) may be used to detect PDCCH.
- CORESET corresponds to a resource that searches for DCI.
- the search space corresponds to the search area and search method of PDCCH candidates (PDCCH candidates).
- One CORESET may be associated with one or more search spaces. The UE may monitor the CORESET associated with a search space based on the search space settings.
- One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set.
- the "search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. of the present disclosure may be read as each other.
- channel state information (Channel State Information (CSI)
- delivery confirmation information for example, it may be called Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK / NACK, etc.
- scheduling request (Scheduling Request () Uplink Control Information (UCI) including at least one of SR)
- the PRACH may transmit a random access preamble to establish a connection with the cell.
- downlinks, uplinks, etc. may be expressed without “links”. Further, it may be expressed without adding "Physical" at the beginning of various channels.
- a synchronization signal (Synchronization Signal (SS)), a downlink reference signal (Downlink Reference Signal (DL-RS)), and the like may be transmitted.
- the DL-RS includes a cell-specific reference signal (Cell-specific Reference Signal (CRS)), a channel state information reference signal (Channel State Information Reference Signal (CSI-RS)), and a demodulation reference signal (DeModulation).
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information Reference Signal
- DeModulation Demodulation reference signal
- Reference Signal (DMRS)), positioning reference signal (Positioning Reference Signal (PRS)), phase tracking reference signal (Phase Tracking Reference Signal (PTRS)), and the like may be transmitted.
- PRS Positioning Reference Signal
- PTRS Phase Tracking Reference Signal
- the synchronization signal may be, for example, at least one of a primary synchronization signal (Primary Synchronization Signal (PSS)) and a secondary synchronization signal (Secondary Synchronization Signal (SSS)).
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- the signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be referred to as SS / PBCH block, SS Block (SSB) and the like.
- SS, SSB and the like may also be called a reference signal.
- a measurement reference signal Sounding Reference Signal (SRS)
- a demodulation reference signal DMRS
- UL-RS Uplink Reference Signal
- UE-specific Reference Signal UE-specific Reference Signal
- FIG. 6 is a diagram showing an example of the configuration of the base station according to the embodiment.
- the base station 10 includes a control unit 110, a transmission / reception unit 120, a transmission / reception antenna 130, and a transmission line interface 140.
- the control unit 110, the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 110 controls the entire base station 10.
- the control unit 110 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 110 may control signal generation, scheduling (for example, resource allocation, mapping) and the like.
- the control unit 110 may control transmission / reception, measurement, and the like using the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 120.
- the control unit 110 may perform call processing (setting, release, etc.) of the communication channel, state management of the base station 10, management of radio resources, and the like.
- the transmission / reception unit 120 may include a baseband unit 121, a Radio Frequency (RF) unit 122, and a measurement unit 123.
- the baseband unit 121 may include a transmission processing unit 1211 and a reception processing unit 1212.
- the transmitter / receiver 120 includes a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on common recognition in the technical fields according to the present disclosure. be able to.
- the transmission / reception unit 120 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 1211 and an RF unit 122.
- the receiving unit may be composed of a receiving processing unit 1212, an RF unit 122, and a measuring unit 123.
- the transmitting / receiving antenna 130 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 120 may receive the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 120 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 120 processes, for example, Packet Data Convergence Protocol (PDCP) layer processing and Radio Link Control (RLC) layer processing (for example, RLC) for data, control information, etc. acquired from control unit 110.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control for example, HARQ retransmission control
- the transmission / reception unit 120 performs channel coding (may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (Discrete Fourier Transform (DFT)) for the bit string to be transmitted.
- the base band signal may be output by performing processing (if necessary), inverse fast Fourier transform (IFFT) processing, precoding, digital-analog conversion, and other transmission processing.
- IFFT inverse fast Fourier transform
- the transmission / reception unit 120 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 130. ..
- the transmission / reception unit 120 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 130.
- the transmission / reception unit 120 (reception processing unit 1212) performs analog-digital conversion, fast Fourier transform (FFT) processing, and inverse discrete Fourier transform (IDFT) on the acquired baseband signal. )) Processing (if necessary), filtering, decoding, demodulation, decoding (may include error correction decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing are applied. User data and the like may be acquired.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- the transmission / reception unit 120 may perform measurement on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, or the like based on the received signal.
- the measuring unit 123 has received power (for example, Reference Signal Received Power (RSRP)) and reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)).
- RSRP Reference Signal Received Power
- RSSQ Reference Signal Received Quality
- SINR Signal to Noise Ratio
- Signal strength for example, Received Signal Strength Indicator (RSSI)
- propagation path information for example, CSI
- the measurement result may be output to the control unit 110.
- the transmission line interface 140 transmits / receives signals (backhaul signaling) to / from a device included in the core network 30, another base station 10 and the like, and provides user data (user plane data) and control plane for the user terminal 20. Data or the like may be acquired or transmitted.
- the transmission unit and the reception unit of the base station 10 in the present disclosure may be composed of at least one of the transmission / reception unit 120, the transmission / reception antenna 130, and the transmission line interface 140.
- FIG. 7 is a diagram showing an example of the configuration of the user terminal according to the embodiment.
- the user terminal 20 includes a control unit 210, a transmission / reception unit 220, and a transmission / reception antenna 230.
- the control unit 210, the transmission / reception unit 220, and the transmission / reception antenna 230 may each be provided with one or more.
- this example mainly shows the functional blocks of the feature portion in the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each part described below may be omitted.
- the control unit 210 controls the entire user terminal 20.
- the control unit 210 can be composed of a controller, a control circuit, and the like described based on the common recognition in the technical field according to the present disclosure.
- the control unit 210 may control signal generation, mapping, and the like.
- the control unit 210 may control transmission / reception, measurement, and the like using the transmission / reception unit 220 and the transmission / reception antenna 230.
- the control unit 210 may generate data to be transmitted as a signal, control information, a sequence, and the like, and transfer the data to the transmission / reception unit 220.
- the transmission / reception unit 220 may include a baseband unit 221 and an RF unit 222, and a measurement unit 223.
- the baseband unit 221 may include a transmission processing unit 2211 and a reception processing unit 2212.
- the transmitter / receiver 220 can be composed of a transmitter / receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitter / receiver circuit, and the like, which are described based on the common recognition in the technical field according to the present disclosure.
- the transmission / reception unit 220 may be configured as an integrated transmission / reception unit, or may be composed of a transmission unit and a reception unit.
- the transmission unit may be composed of a transmission processing unit 2211 and an RF unit 222.
- the receiving unit may be composed of a receiving processing unit 2212, an RF unit 222, and a measuring unit 223.
- the transmitting / receiving antenna 230 can be composed of an antenna described based on common recognition in the technical field according to the present disclosure, for example, an array antenna.
- the transmission / reception unit 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, and the like.
- the transmission / reception unit 220 may transmit the above-mentioned uplink channel, uplink reference signal, and the like.
- the transmission / reception unit 220 may form at least one of a transmission beam and a reception beam by using digital beamforming (for example, precoding), analog beamforming (for example, phase rotation), and the like.
- digital beamforming for example, precoding
- analog beamforming for example, phase rotation
- the transmission / reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), and MAC layer processing (for example, for data, control information, etc. acquired from the control unit 210). , HARQ retransmission control), etc., to generate a bit string to be transmitted.
- RLC layer processing for example, RLC retransmission control
- MAC layer processing for example, for data, control information, etc. acquired from the control unit 210.
- HARQ retransmission control HARQ retransmission control
- the transmission / reception unit 220 (transmission processing unit 2211) performs channel coding (may include error correction coding), modulation, mapping, filtering processing, DFT processing (if necessary), and IFFT processing for the bit string to be transmitted. , Precoding, digital-to-analog conversion, and other transmission processing may be performed to output the baseband signal.
- Whether or not to apply the DFT process may be based on the transform precoding setting.
- the transmission / reception unit 220 transmits the channel using the DFT-s-OFDM waveform.
- the DFT process may be performed as the transmission process, and if not, the DFT process may not be performed as the transmission process.
- the transmission / reception unit 220 may perform modulation, filtering, amplification, etc. on the baseband signal to the radio frequency band, and transmit the signal in the radio frequency band via the transmission / reception antenna 230. ..
- the transmission / reception unit 220 may perform amplification, filtering, demodulation to a baseband signal, or the like on the signal in the radio frequency band received by the transmission / reception antenna 230.
- the transmission / reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering processing, demapping, demodulation, and decoding (error correction) for the acquired baseband signal. Decoding may be included), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
- the transmission / reception unit 220 may perform measurement on the received signal.
- the measuring unit 223 may perform RRM measurement, CSI measurement, or the like based on the received signal.
- the measuring unit 223 may measure received power (for example, RSRP), reception quality (for example, RSRQ, SINR, SNR), signal strength (for example, RSSI), propagation path information (for example, CSI), and the like.
- the measurement result may be output to the control unit 210.
- the transmitting unit and the receiving unit of the user terminal 20 in the present disclosure may be composed of at least one of the transmitting / receiving unit 220 and the transmitting / receiving antenna 230.
- the control unit 210 uses a pseudo-collocation (QCL) reference signal for the specific downlink resource. It may be used for the spatial relationship of the target SRS resources in the one or more SRS resource sets.
- the transmission / reception unit 220 may perform uplink transmission using the spatial relationship.
- the one or more SRS resource sets may be a plurality of SRS resource sets. Each of the plurality of SRS resource sets may have an antenna switching application.
- the uplink transmission may be an SRS transmission over a plurality of slots based on a plurality of SRS resources in the plurality of SRS resource sets.
- Each of the plurality of SRS resource sets may have an aperiodic resource type.
- the transmitter / receiver 220 may transmit capability information indicating that SRS transmission on one antenna port over a total of four antennas is possible.
- the target SRS resource may be either the at least one SRS resource or all the SRS resources in the one or more SRS resource sets.
- each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
- the functional block may be realized by combining the software with the one device or the plurality of devices.
- the functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and deemed. , Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
- a functional block (constituent unit) for functioning transmission may be referred to as a transmitting unit (transmitting unit), a transmitter (transmitter), or the like.
- the method of realizing each of them is not particularly limited.
- the base station, user terminal, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
- FIG. 8 is a diagram showing an example of the hardware configuration of the base station and the user terminal according to the embodiment.
- the base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..
- the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
- processor 1001 may be a plurality of processors. Further, the processing may be executed by one processor, or the processing may be executed simultaneously, sequentially, or by using other methods by two or more processors.
- the processor 1001 may be mounted by one or more chips.
- the processor 1001 For each function of the base station 10 and the user terminal 20, for example, by loading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation and communicates via the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
- predetermined software program
- Processor 1001 operates, for example, an operating system to control the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
- CPU central processing unit
- control unit 110 210
- transmission / reception unit 120 220
- the like may be realized by the processor 1001.
- the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
- a program program code
- the control unit 110 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized in the same manner for other functional blocks.
- the memory 1002 is a computer-readable recording medium, for example, at least a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically EPROM (EPROM), a Random Access Memory (RAM), or any other suitable storage medium. It may be composed of one.
- the memory 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store a program (program code), a software module, or the like that can be executed to implement the wireless communication method according to the embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, and is, for example, a flexible disc, a floppy (registered trademark) disc, an optical magnetic disc (for example, a compact disc (Compact Disc ROM (CD-ROM)), a digital versatile disc, etc.). At least one of Blu-ray® disks, removable disks, optical disc drives, smart cards, flash memory devices (eg cards, sticks, key drives), magnetic stripes, databases, servers, and other suitable storage media. It may be composed of.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (Frequency Division Duplex (FDD)) and time division duplex (Time Division Duplex (TDD)). May be configured to include.
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmission / reception unit 120 (220), the transmission / reception antenna 130 (230), and the like described above may be realized by the communication device 1004.
- the transmission / reception unit 120 (220) may be physically or logically separated from the transmission unit 120a (220a) and the reception unit 120b (220b).
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
- the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
- the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (Digital Signal Processor (DSP)), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), and the like. It may be configured to include hardware, and a part or all of each functional block may be realized by using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
- DSP Digital Signal Processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the wireless frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the wireless frame may be referred to as a subframe.
- the subframe may be composed of one or more slots in the time domain.
- the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
- the numerology may be a communication parameter applied to at least one of transmission and reception of a signal or channel.
- Numerology includes, for example, subcarrier spacing (SubCarrier Spacing (SCS)), bandwidth, symbol length, cyclic prefix length, transmission time interval (Transmission Time Interval (TTI)), number of symbols per TTI, and wireless frame configuration.
- SCS subcarrier Spacing
- TTI Transmission Time Interval
- a specific filtering process performed by the transmitter / receiver in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
- the slot may be composed of one or more symbols in the time domain (Orthogonal Frequency Division Multiple Access (OFDMA) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.).
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the slot may be a time unit based on numerology.
- the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. The mini-slot may also be referred to as a sub-slot. A minislot may consist of a smaller number of symbols than the slot.
- a PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as a PDSCH (PUSCH) mapping type A.
- the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (PUSCH) mapping type B.
- the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
- the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
- the time units such as frames, subframes, slots, mini slots, and symbols in the present disclosure may be read as each other.
- one subframe may be called TTI
- a plurality of consecutive subframes may be called TTI
- one slot or one minislot may be called TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
- the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
- TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
- the base station schedules each user terminal to allocate radio resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
- the time interval for example, the number of symbols
- the transport block, code block, code word, etc. may be shorter than the TTI.
- one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in 3GPP Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
- TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
- the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
- the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers contained in the RB may be determined based on numerology.
- the RB may include one or more symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe or 1 TTI.
- Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
- One or more RBs are a physical resource block (Physical RB (PRB)), a sub-carrier group (Sub-Carrier Group (SCG)), a resource element group (Resource Element Group (REG)), a PRB pair, and an RB. It may be called a pair or the like.
- Physical RB Physical RB (PRB)
- SCG sub-carrier Group
- REG resource element group
- the resource block may be composed of one or a plurality of resource elements (Resource Element (RE)).
- RE Resource Element
- 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
- Bandwidth Part (which may also be called partial bandwidth, etc.) represents a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. May be good.
- the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be set in one carrier for the UE.
- At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
- “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
- the above-mentioned structures such as wireless frames, subframes, slots, mini slots, and symbols are merely examples.
- the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
- the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
- the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented. For example, radio resources may be indicated by a given index.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
- information, signals, etc. can be output from the upper layer to the lower layer and from the lower layer to at least one of the upper layers.
- Information, signals, etc. may be input / output via a plurality of network nodes.
- Input / output information, signals, etc. may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information, signals, etc. can be overwritten, updated, or added. The output information, signals, etc. may be deleted. The input information, signals, etc. may be transmitted to other devices.
- the notification of information is not limited to the mode / embodiment described in the present disclosure, and may be performed by using other methods.
- the notification of information in the present disclosure includes physical layer signaling (for example, downlink control information (DCI)), uplink control information (Uplink Control Information (UCI))), and higher layer signaling (for example, Radio Resource Control). (RRC) signaling, broadcast information (master information block (MIB), system information block (SIB), etc.), medium access control (MAC) signaling), other signals or combinations thereof May be carried out by.
- DCI downlink control information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB master information block
- SIB system information block
- MAC medium access control
- the physical layer signaling may be referred to as Layer 1 / Layer 2 (L1 / L2) control information (L1 / L2 control signal), L1 control information (L1 control signal), and the like.
- the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
- MAC signaling may be notified using, for example, a MAC control element (MAC Control Element (CE)).
- CE MAC Control Element
- the notification of predetermined information is not limited to the explicit notification, but implicitly (for example, by not notifying the predetermined information or another information). May be done (by notification of).
- the determination may be made by a value represented by 1 bit (0 or 1), or by a boolean value represented by true or false. , May be done by numerical comparison (eg, comparison with a given value).
- Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
- Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- a transmission medium For example, a website where software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
- wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
- wireless technology infrared, microwave, etc.
- the terms “system” and “network” used in this disclosure may be used interchangeably.
- the “network” may mean a device (eg, a base station) included in the network.
- precoding "precoding weight”
- QCL Quality of Co-Co-Location
- TCI state Transmission Configuration Indication state
- space "Spatial relation”, “spatial domain filter”, “transmission power”, “phase rotation”, "antenna port”, “antenna port group”, “layer”, “number of layers”
- Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, "antenna”, “antenna element", “panel” are compatible.
- Base station BS
- radio base station fixed station
- NodeB NodeB
- eNB eNodeB
- gNB gNodeB
- Access point "Transmission point (Transmission Point (TP))
- RP Reception point
- TRP Transmission / Reception Point
- Panel , "Cell”, “sector”, “cell group”, “carrier”, “component carrier” and the like
- Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
- the base station can accommodate one or more (for example, three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)).
- Communication services can also be provided by Head (RRH))).
- RRH Head
- the term "cell” or “sector” refers to part or all of the coverage area of at least one of the base stations and base station subsystems that provide communication services in this coverage.
- MS mobile station
- UE user equipment
- terminal terminal
- Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , Handset, user agent, mobile client, client or some other suitable term.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
- the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
- at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
- at least one of the base station and the mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read by the user terminal.
- the communication between the base station and the user terminal is replaced with the communication between a plurality of user terminals (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- D2D Device-to-Device
- V2X Vehicle-to-Everything
- Each aspect / embodiment of the present disclosure may be applied to the configuration.
- the user terminal 20 may have the function of the base station 10 described above.
- words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side”).
- an uplink channel, a downlink channel, and the like may be read as a side channel.
- the user terminal in the present disclosure may be read as a base station.
- the base station 10 may have the functions of the user terminal 20 described above.
- the operation performed by the base station may be performed by its upper node (upper node) in some cases.
- various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example,).
- Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. can be considered, but it is not limited to these), or it is clear that it can be performed by a combination thereof.
- each aspect / embodiment described in the present disclosure may be used alone, in combination, or switched with execution. Further, the order of the processing procedures, sequences, flowcharts, etc. of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in the present disclosure present elements of various steps using exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- Future Radio Access FAA
- New-Radio Access Technology RAT
- NR New Radio
- NX New radio access
- Future generation radio access FX
- GSM Global System for Mobile communications
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi (registered trademark)
- IEEE 802.16 WiMAX (registered trademark)
- a plurality of systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).
- references to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted or that the first element must somehow precede the second element.
- determining used in this disclosure may include a wide variety of actions.
- judgment (decision) means judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) ( For example, searching in a table, database or another data structure), ascertaining, etc. may be considered to be "judgment”.
- judgment (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access (for example). It may be regarded as “judgment (decision)” such as “accessing” (for example, accessing data in memory).
- judgment (decision) is regarded as “judgment (decision)” of solving, selecting, selecting, establishing, comparing, and the like. May be good. That is, “judgment (decision)” may be regarded as “judgment (decision)” of some action.
- connection are any direct or indirect connection or connection between two or more elements. Means, and can include the presence of one or more intermediate elements between two elements that are “connected” or “joined” to each other.
- the connection or connection between the elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
- the radio frequency domain microwaves. It can be considered to be “connected” or “coupled” to each other using frequency, electromagnetic energy having wavelengths in the light (both visible and invisible) regions, and the like.
- the term "A and B are different” may mean “A and B are different from each other”.
- the term may mean that "A and B are different from C”.
- Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
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Abstract
Description
<PUSCH用送信電力制御>
NRでは、PUSCHの送信電力は、DCI内の所定フィールド(TPCコマンドフィールド等ともいう)の値が示すTPCコマンド(値、増減値、補正値(correction value)等ともいう)に基づいて制御される。
また、NRでは、PUCCHの送信電力は、DCI内の所定フィールド(TPCコマンドフィールド、第1のフィールド等ともいう)の値が示すTPCコマンド(値、増減値、補正値(correction value)、指示値、等ともいう)に基づいて制御される。
例えば、電力制御調整状態(power control adjustment state)のインデックスlを用いて、サービングセルcのキャリアfのアクティブUL BWP bについてのSRS送信機会(transmission occasion)(送信期間等ともいう)iにおけるSRSの送信電力(PSRS、b,f,c(i,qs,l))は、下記式(5)で表されてもよい。電力制御調整状態は、電力制御調整状態インデックスlのTPCコマンドに基づく値、TPCコマンドの累積値、クローズドループによる値、と呼ばれてもよい。lは、クローズドループインデックスと呼ばれてもよい。
NRでは、送信設定指示状態(Transmission Configuration Indication state(TCI状態))に基づいて、信号及びチャネルの少なくとも一方(信号/チャネルと表現する)のUEにおける受信処理(例えば、受信、デマッピング、復調、復号の少なくとも1つ)、送信処理(例えば、送信、マッピング、プリコーディング、変調、符号化の少なくとも1つ)を制御することが検討されている。
・QCLタイプA(QCL-A):ドップラーシフト、ドップラースプレッド、平均遅延及び遅延スプレッド、
・QCLタイプB(QCL-B):ドップラーシフト及びドップラースプレッド、
・QCLタイプC(QCL-C):ドップラーシフト及び平均遅延、
・QCLタイプD(QCL-D):空間受信パラメータ。
PDCCH(又はPDCCHに関連するDMRSアンテナポート)及び所定のRSとのQCLに関する情報は、PDCCHのためのTCI状態などと呼ばれてもよい。
PDSCH(又はPDSCHに関連するDMRSアンテナポート)及び所定のDL-RSとのQCLに関する情報は、PDSCHのためのTCI状態などと呼ばれてもよい。
UEは、上位レイヤシグナリング(例えば、Radio Resource Control(RRC)シグナリング)によって、PUCCH送信に用いられるパラメータ(PUCCH設定情報、PUCCH-Config)を設定されてもよい。PUCCH設定情報は、キャリア(セル、コンポーネントキャリア(Component Carrier(CC))ともいう)内の部分的な帯域(例えば、上り帯域幅部分(Bandwidth Part(BWP)))毎に設定されてもよい。
UEは、測定用参照信号(例えば、サウンディング参照信号(Sounding Reference Signal(SRS)))の送信に用いられる情報(SRS設定情報、例えば、RRC制御要素の「SRS-Config」内のパラメータ)を受信してもよい。
DCIフォーマット0_1はSRIを含むが、DCIフォーマット0_0はSRIを含まない。
ビームコレスポンデンスをサポートするUEに対し、もしある周波数範囲(例えば、frequency range(FR)2)において、ビーム管理用途(usage='beamManagement')を有するSRSを除く、個別PUCCH設定又は個別SRS設定に対する空間関係情報が、設定されない場合、個別PUCCH設定又は個別SRS設定に対してデフォルト空間関係が適用されてもよい。
UEは、アンテナスイッチング用途(usage='antennaSwitching')を有するSRSリソースセット(SRS-ResourceSet)内の各SRSリソースを用いてSRSを送信する。このようなSRSの送信は、DLプリコーダの決定に用いられる。SRSリソースセット内の複数のSRSリソースに対して異なる空間関係が適用されると、基地局はDLプリコーダを適切に決定できない。したがって、SRSの送信に対して同じ空間関係が適用されるべきである。
1T2Rに対し、SRSリソースセット内のリソースタイプ(上位レイヤパラメータresourceType)に対して異なる値を設定される2個までのSRSリソースセット。各セットは、異なるシンボルにおいて送信される2つのSRSリソースを有し、与えられたセット内の各SRSリソースは単一のSRSポートから成り、当該セット内の第2リソースのSRSポートは、同じセット内の第1リソースのSRSポートと異なるUEアンテナポートに関連付けられる。
2T4Rに対し、SRSリソースセット内のリソースタイプ(上位レイヤパラメータresourceType)に対して異なる値を設定される2個までのSRSリソースセット。各SRSリソースセットは、異なるシンボルにおいて送信される2つのSRSリソースを有し、与えられたセット内の各SRSリソースは2つのSRSポートから成り、当該セット内の第2リソースのSRSポートペアは、同じセット内の第1リソースのSRSポートペアと異なるUEアンテナポートペアに関連付けられる。
1T4Rに対し、異なるシンボルにおいて送信される4個のSRSリソースを有し、周期的(periodic)又はセミパーシステント(semi-persistent)にセットされるSRSリソースセット内のリソースタイプ(上位レイヤパラメータresourceType)を設定される、0個又は1個のSRSリソースセット。与えられたセット内の各SRSリソースは単一のSRSポートから成り、各リソースのSRSポートは、異なるUEアンテナポートに関連付けられる。
1T4Rに対し、2つの異なるスロットの異なるシンボルにおいて送信される合計で4個のSRSリソースを有し、非周期的(aperiodic)にセットされるSRSリソースセット内のリソースタイプ(上位レイヤパラメータresourceType)をそれぞれ設定される、0個又は2個のSRSリソースセット。与えられた2つのセット内の各SRSリソースのSRSポートは、異なるUEアンテナポートに関連付けられる。当該2個のセットのそれぞれは2つのSRSリソースを設定される、又は、一方のセットは1つのSRSリソースを設定され、他方のセットは3つのSRSリソースを設定される。UEは、当該2つのセットの両方が、SRSリソースセット内の電力制御パラメータ(上位レイヤパラメータalpha、p0、pathlossReferenceRS、及びsrs-PowerControlAdjustmentStates)の同じ値を設定されると期待する。UEは、各SRSリソースセット内のパラメータ(上位レイヤパラメータaperiodicSRS-ResourceTrigger、DCI内のSRS要求フィールドのコードポイントを示すパラメータ)の値が同じであり、各SRSリソースセット内の上位レイヤパラメータslotOffsetの値が異なると期待する。
1T=1R,2T=2R、又は4T=4Rに対し、それぞれが1つのSRSリソースを有する2個までのSRSリソースセット。各リソースに対するSRSポートの数は1、2、又は4である。
前述のように、もしUEがパスロス参照RS(pathlossReferenceRSs)を与えられない場合、又はUEが個別上位レイヤパラメータを与えられる前において、UEは、UEがMIBを取得するために用いるSS/PBCHブロックから得られるRSリソースを、パスロス計算に用いてもよい。
<デフォルト空間関係適用条件>
もしデフォルト空間関係適用条件が満たされる場合、UEは、特定UL送信の空間関係にデフォルト空間関係を適用してもよい。特定UL送信は、PUSCH、PUCCH、SRS、P-SRS、SP-SRS、A-SRS、の少なくとも1つであってもよい。
デフォルト空間関係は、特定DLリソースのQCLのRSであってもよい。
デフォルト空間関係は、PDSCHのデフォルトTCI状態又はデフォルトQCL想定であってもよい。
デフォルト空間関係は、CORESETのアクティブTCI状態(アクティベートされたTCI状態)の1つであってもよい。
特定UL送信がPDCCHに対応する場合(PDSCHのスケジューリング用のPDCCH(DL DCI)によって特定UL送信がスケジュールされる又はトリガされる場合)、特定UL送信のデフォルト空間関係は、当該PDCCHのTCI状態であってもよい。特定UL送信は、当該PDCCHによってトリガされるA-SRSであってもよいし、当該PDCCHによってスケジュールされるPDSCHに対するHARQ-ACKを運ぶPUCCHであってもよい。例えば、特定UL送信がA-SRSである場合、特定UL送信に対応するPDCCHは、A-SRSをトリガするPDCCHであってもよい。また、例えば、特定UL送信がHARQ-ACKを運ぶPUCCHである場合、特定UL送信に対応するPDCCHは、PDSCHをスケジュールし、当該PDSCHのHARQ-ACKのタイミングを示すPDCCHであってもよい。特定UL送信がPDCCHに対応しない場合、デフォルト空間関係は、前述のデフォルト空間関係1であってもよい。
デフォルト空間関係は、CORESET#0(0のIDを有するCORESET)のQCL想定であってもよい。
デフォルト空間関係は、パスロス参照RSであってもよい。
特定UL送信が、アンテナスイッチング用途のSRSリソースセットに基づくSRSであってもよい。この場合、UEは、特定時間リソースに基づいてデフォルト空間関係を決定してもよい。例えば、UEは、特定UL送信のうち、特定時間リソースのSRSリソースを用いるSRSのデフォルト空間関係を決定してもよい。特定時間リソースは、特定スロットであってもよい。特定時間リソースは、時間リソースは、サブフレーム、スロット、サブスロット、シンボルの少なくとも1つを含んでもよい。
特定スロットは、アンテナスイッチング用途のSRSリソースセット内の最初又は最後に送信されるSRSリソースのスロットであってもよい。
特定スロットは、アンテナスイッチング用途のSRSリソースセット内の最低ID又は最高IDを有するSRSリソースのスロットであってもよい。
もしSRSリソースセット内の少なくとも1つのSRSリソースに対して空間関係情報が設定されない場合、UEは、当該SRSリソースセット内の対象SRSリソースに対してデフォルト空間関係を適用してもよい。もし特定用途を有するSRSリソースセット内の少なくとも1つのSRSリソースに対して空間関係情報が設定されない場合、UEは、当該SRSリソースセット内の対象SRSリソースに対してデフォルト空間関係を適用してもよい。
SRSリソースセット内の一部のSRSリソースに対して空間関係情報が設定されない場合、対象SRSリソースは、当該SRSリソースであってもよい。
SRSリソースセット内の一部のSRSリソースに対して空間関係情報が設定されない場合、対象SRSリソースは、当該SRSリソースセット内の全てのSRSリソースであってもよい。この場合、UEは、当該SRSリソースセットの各SRSリソースに空間関係情報が設定されているか否かに関わらず、当該SRSリソースセットの全てのSRSリソースにデフォルト空間関係を適用してもよい。
SRSリソースセット内の一部のSRSリソースに対して空間関係情報が設定されない場合、UEは、当該SRSリソースセット内の各SRSリソースの時間リソース(送信タイミング)に基づいて、対応するSRSリソースのデフォルト空間関係を決定してもよい。
SRSリソースセット内の一部のSRSリソースに対して空間関係情報が設定されない場合、UEは、当該SRSリソースセット内の特定SRSリソースの時間リソース(送信タイミング)に基づいて、各SRSリソースのデフォルト空間関係を決定してもよい。特定SRSリソースは、当該SRSリソースセット内の、最低IDを有するSRSリソース、最高IDを有するSRSリソース、最初に送信されるSRSリソース、最後に送信されるSRSリソース、最低周波数リソースを有するSRSリソース、最高周波数リソースを有するSRSリソース、のいずれかであってもよい。特定SRSリソースは、当該SRSリソースセット内の空間関係情報を設定されないSRSリソースセットのうち、最低IDを有するSRSリソース、最高IDを有するSRSリソース、最初に送信されるSRSリソース、最後に送信されるSRSリソース、最低周波数リソースを有するSRSリソース、最高周波数リソースを有するSRSリソース、のいずれかであってもよい。
もし計算RS適用条件が満たされる場合、UEは、特定セルの特定UL送信のためのパスロス計算に、計算RSを用いてもよい。計算RS適用条件は、UEがパスロス参照RS(pathlossReferenceRSs)を与えられない(設定されない)、又はUEが個別上位レイヤパラメータを与えられる前であること、を含んでもよい。計算RS適用条件は、UEが特定セルの特定UL送信に対するパスロス参照RS(pathlossReferenceRSs)を与えられない(設定されない)、又はUEが個別上位レイヤパラメータを与えられる前であること、を含んでもよい。計算RS適用条件は、UEがパスロス参照RS情報(例えば、PUCCH電力制御情報(PUCCH-PowerControl)内のpathlossReferenceRSs)を与えられ、且つPUCCH空間関係情報(例えば、PUCCH-SpatialRelationInfo)を与えられないこと、を含んでもよい。
もし計算RS適用条件が満たされる場合、UEは、全てのセルのパスロス計算に同じ計算RSを用いてもよい。例えば、もし計算RS適用条件が満たされる場合、UEは、第1セルの計算RSを全てのセルの(全てのセルの特定UL送信のための)パスロス計算に用いてもよい。
もし計算RS適用条件が満たされる場合、UEは、計算RSを第1セルのパスロス計算に用いてもよい。例えば、もし計算RS適用条件が満たされる場合、MIBを取得するために用いられたSS/PBCHブロックが第1セルのCC又はBWPにある場合、UEは、計算RSを第1セルの(第1セルの特定UL送信のための)パスロス計算に用いてもよい。
もし計算RS適用条件が満たされる場合、UEは、計算RSを第1セルのパスロス計算に用いてもよい。例えば、もし計算RS適用条件が満たされる場合、MIBを取得するために用いられたSS/PBCHブロックが第1セルのCC又はBWPにある場合、UEは、計算RSを第1セルの(第1セルの特定UL送信のための)パスロス計算に用いてもよい。
もし計算RS適用条件が満たされる場合、UEは、特定UL送信のデフォルト空間関係のRSを、特定セルの特定UL送信のためのパスロス計算に用いてもよい。例えば、もし計算RS適用条件が満たされる場合、UEは、PDSCHのデフォルトTCI状態又はQCL想定を、特定セルの特定UL送信のためのパスロス計算に用いてもよい。
UEは、パスロス計算のために、パスロス計算期間(長区間、スロットよりも長い時間、パスロス計算に十分な時間)にわたってパスロス参照RSの参照信号受信電力(reference signal received power(RSRP))を測定する。もし計算RSが空間関係に基づくと(例えば、前述の特定セルRS決定方法4を用いる場合)、計算RSがスロットに依存して異なり、UEは、パスロス計算期間にわたって同じRSを測定することができない可能性がある。
計算RSは、UEがMIBを取得するために用いるSS/PBCHブロックから得られるRSリソースであってもよい。パスロス参照RS情報が設定されている場合の計算RSは、パスロス参照RS情報内のインデックス0を有するパスロス参照RSであってもよい。例えば、計算RSは、PUCCH用パスロス参照RS情報(PUCCH-PathlossReferenceRS)内のインデックス0を有するPUCCH用パスロス参照RS-ID(PUCCH-PathlossReferenceRS-Id)からのPUCCH用パスロス参照RS内の参照信号であってもよい。
計算RSは、デフォルトパスロス参照RSであってもよい。
もしデフォルト空間関係適用条件が満たされ、且つもし計算RS適用条件が満たされる場合、UEは、特定UL送信のためのパスロス計算に計算RSを用いてもよい。計算RSは、特定UL送信のためのデフォルト空間関係であってもよい。
計算RSがデフォルト空間関係であるケースにおいてパスロス計算に用いられるサンプル数は、当該ケース以外のパスロス計算に用いられるサンプル数より少なくてもよい。当該ケースにおいてパスロス計算に用いられる時間(パスロス計算期間)の長さは、当該ケース以外のパスロス計算に用いられる時間(パスロス計算期間)の長さより短くてもよい。
特定UL送信のための計算RS(デフォルト空間関係)が時間に依存して変化する場合であっても、当該RSのRSRPを用いてパスロスを計算してもよい。パスロス計算期間における計算RSが複数のRSになる(異なるRSに変化する)場合であっても、UEは、複数のRSから得られるRSRPを用いてパスロスを計算してもよい。例えば、UEは、複数のRSから得られる複数のRSRPの平均を用いてパスロスを計算してもよい。
UEは、デフォルト空間関係と同じRSから得られるパスロスを送信電力制御に用いてもよい。UEは、特定UL送信のデフォルト空間関係と同じRSから得られるパスロスを、特定UL送信の送信電力制御に用いてもよい。UEは、TCI状態毎にパスロスを計算し、特定UL送信のデフォルト空間関係のTCI状態に対応して、特定UL送信の送信電力制御に用いるパスロスを決定してもよい。
以下、本開示の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本開示の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図6は、一実施形態に係る基地局の構成の一例を示す図である。基地局10は、制御部110、送受信部120、送受信アンテナ130及び伝送路インターフェース(transmission line interface)140を備えている。なお、制御部110、送受信部120及び送受信アンテナ130及び伝送路インターフェース140は、それぞれ1つ以上が備えられてもよい。
図7は、一実施形態に係るユーザ端末の構成の一例を示す図である。ユーザ端末20は、制御部210、送受信部220及び送受信アンテナ230を備えている。なお、制御部210、送受信部220及び送受信アンテナ230は、それぞれ1つ以上が備えられてもよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル、シンボル及び信号(シグナル又はシグナリング)は、互いに読み替えられてもよい。また、信号はメッセージであってもよい。参照信号(reference signal)は、RSと略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(Component Carrier(CC))は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- もし1以上のサウンディング参照信号(SRS)リソースセット内の少なくとも1つのSRSリソースに対して空間関係情報が設定されない場合、特定下りリンクリソースの疑似コロケーション(QCL)の参照信号を、前記1以上のSRSリソースセット内の対象SRSリソースの空間関係に用いる制御部と、
前記空間関係を用いて上りリンク送信を行う送信部と、を有する端末。 - 前記1以上のSRSリソースセットは、複数SRSリソースセットであり、
前記複数のSRSリソースセットのそれぞれは、アンテナスイッチングの用途を有し、
前記上りリンク送信は、前記複数のSRSリソースセット内の複数のSRSリソースに基づき、複数スロットにわたるSRS送信である、請求項1に記載の端末。 - 前記複数のSRSリソースセットのそれぞれは、非周期的のリソースタイプを有する、請求項2に記載の端末。
- 前記送信部は、合計で4個のアンテナにわたる1個のアンテナポート上のSRS送信が可能であることを示す能力情報を送信する、請求項2又は請求項3に記載の端末。
- 前記対象SRSリソースは、前記少なくとも1つのSRSリソースと、前記1以上のSRSリソースセット内の全てのSRSリソースと、のいずれかである、請求項1から請求項4のいずれかに記載の端末。
- もし1以上のサウンディング参照信号(SRS)リソースセット内の少なくとも1つのSRSリソースに対して空間関係情報が設定されない場合、特定下りリンクリソースの疑似コロケーション(QCL)の参照信号を、前記1以上のSRSリソースセット内の対象SRSリソースの空間関係に用いるステップと、
前記空間関係を用いて上りリンク送信を行うステップと、を有する端末の無線通信方法。
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