WO2024176392A1 - 端末、無線通信方法及び基地局 - Google Patents
端末、無線通信方法及び基地局 Download PDFInfo
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- WO2024176392A1 WO2024176392A1 PCT/JP2023/006481 JP2023006481W WO2024176392A1 WO 2024176392 A1 WO2024176392 A1 WO 2024176392A1 JP 2023006481 W JP2023006481 W JP 2023006481W WO 2024176392 A1 WO2024176392 A1 WO 2024176392A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0457—Variable allocation of band or rate
Definitions
- This disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
- LTE Long Term Evolution
- UMTS Universal Mobile Telecommunications System
- Non-Patent Document 1 LTE-Advanced (3GPP Rel. 10-14) was specified for the purpose of achieving higher capacity and greater sophistication over LTE (Third Generation Partnership Project (3GPP (registered trademark)) Release (Rel.) 8, 9).
- LTE 5th generation mobile communication system
- 5G+ 5th generation mobile communication system
- 6G 6th generation mobile communication system
- NR New Radio
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- a UE can use one of the multiple panels (or multiple beams) for uplink (UL) transmission.
- UL uplink
- multiple panels e.g., simultaneous multi-panel UL transmission (SiMPUL/sTxMP)
- TRPs transmission/reception points
- the UE When multi-panel simultaneous UL transmission is supported, the UE transmits UL from two panels simultaneously, but the reporting/calculation of PHR in this case is not clear. For example, the events/conditions that trigger PHR are not clear. This may result in improper transmission control and reduced communication throughput.
- one of the objectives of this disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control transmission power.
- a terminal is characterized in that it has a transmission unit that transmits a Medium Access Control Element (MAC CE) including a power headroom (PHR) for each serving cell or each panel when simultaneous uplink (UL) transmission from multiple panels is supported, and a control unit that controls the transmission of the MAC CE based on specific conditions.
- MAC CE Medium Access Control Element
- PHR power headroom
- transmission power control can be performed appropriately.
- FIGS. 1A-1C are diagrams illustrating an example of PUSCH transmission using multiple panels.
- 2A and 2B are diagrams illustrating an example of PUCCH transmission using multiple panels.
- 3 is a diagram showing an example of a single-entry PHR MAC CE in Rel. 16 NR.
- 4 is a diagram showing an example of a multiple entry PHR MAC CE in Rel. 16 NR.
- FIG. 5 is a diagram showing an outline of PHR transmission.
- 6A-6D show an example of a MAC CE for PHR relating to the second embodiment.
- FIG. 7 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment.
- FIG. 8 is a diagram illustrating an example of the configuration of a base station according to an embodiment.
- FIG. 9 is a diagram illustrating an example of the configuration of a user terminal according to an embodiment.
- FIG. 10 is a diagram illustrating an example of the hardware configuration of a base station and a user terminal according to an embodiment.
- FIG. 11 is a diagram illustrating an example of a vehicle according to an embodiment.
- Multi-panel transmission In Rel. 15 and Rel. 16 UEs, only one beam and panel is used for UL transmission at a time ( Figure 1A). In Rel. 17, simultaneous multi-beam and multi-panel UL transmissions are considered for one or more Transmission/Reception Points (TRPs) to improve UL throughput and reliability.
- TRPs Transmission/Reception Points
- reception by one TRP with multiple panels (Fig. 1B) or reception by two TRPs with ideal backhaul (Fig. 1C) is considered.
- a single PDCCH for scheduling multiple PUSCHs (e.g. simultaneous transmission of PUSCH#1 and PUSCH#2) is considered.
- Panel-specific transmission is considered to be supported and a panel ID is introduced.
- the base station may configure or indicate panel-specific transmissions for UL transmissions using a UL Transmission Configuration Indication (TCI) or a Panel ID.
- TCI Transmission Configuration Indication
- the UL TCI (UL TCI state) may be based on signaling similar to the DL beam indication supported in Rel. 15.
- the Panel ID may be implicitly or explicitly applied to the transmission of at least one of the target RS resource or target RS resource set, PUCCH, SRS, and PRACH. If the Panel ID is explicitly signaled, the Panel ID may be configured in at least one of the target RS, target channel, and reference RS (e.g., DL RS resource configuration or spatial relationship information).
- the UE may transmit multiple physical uplink control channels (PUCCHs).
- PUCCHs physical uplink control channels
- the following schemes 1 and 2 are being considered as transmission methods for simultaneous UL transmission using multiple panels for PUCCHs.
- One PUCCH resource is transmitted simultaneously with two panels/spatial relationships: one PUCCH resource is associated with two panels/beams (see FIG. 2B), each of which is transmitted towards a respective TRP.
- the number of panels may be three or more. In other words, the number of panels, which is two, may be interpreted as three or more.
- Scheme 2 may also be applied to repetition of PUCCH transmission in a single frequency network (SFN).
- SFN single frequency network
- the UE may transmit multiple physical uplink shared channels (PUSCHs).
- PUSCHs physical uplink shared channels
- the following schemes 3-5 are being considered as transmission methods for simultaneous UL transmission using multiple panels for PUSCHs.
- Scheme 3 Single DCI (S-DCI) based Space Division Multiplexing (SDM) scheme: In this scheme, different layers/DMRS ports of one PUSCH are precoded separately and transmitted simultaneously from different UE beams/panels. In this scheme, it is necessary to consider whether to support two CWs (codewords) and whether to transmit simultaneously from two different UE beams/panels.
- S-DCI Spa Division Multiplexing
- Scheme 4 S-DCI based SFN method: In this scheme, the same layer/DMRS port of one PUSCH is transmitted simultaneously from two different UE beams/panels.
- Scheme 5 Simultaneous PUSCH transmission method of M-DCI: In this manner, two independent PUSCHs associated with different TRPs are transmitted simultaneously within the same active BWP.
- the total number of layers of the two PUSCHs may be up to 4 layers.
- the number of layers of each of these two PUSCHs may be specified by the specification, and may be, for example, 1-3 layers, or up to 2 layers.
- UL TCI state In Rel. 16 NR, the use of the UL TCI state as a UL beam indication method is under consideration.
- the notification of the UL TCI state is similar to the notification of the DL beam (DL TCI state) of the UE. Note that the DL TCI state may be read as the TCI state for the PDCCH/PDSCH, and vice versa.
- the channel/signal (which may be called the target channel/RS) for which the UL TCI state is set (specified) may be, for example, at least one of the following: PUSCH (DMRS of PUSCH), PUCCH (DMRS of PUCCH), random access channel (Physical Random Access Channel (PRACH)), SRS, etc.
- PUSCH DMRS of PUSCH
- PUCCH DMRS of PUCCH
- PRACH Physical Random Access Channel
- SRS Physical Random Access Channel
- the RS (source RS) that has a QCL relationship with the channel/signal may be, for example, a DL RS (e.g., SSB, CSI-RS, TRS, etc.) or a UL RS (e.g., SRS, SRS for beam management, etc.).
- a DL RS e.g., SSB, CSI-RS, TRS, etc.
- a UL RS e.g., SRS, SRS for beam management, etc.
- an RS that has a QCL relationship with the channel/signal may be associated with a panel ID for receiving or transmitting the RS.
- the association may be explicitly set (or specified) by higher layer signaling (e.g., RRC signaling, MAC CE, etc.) or may be implicitly determined.
- the correspondence between the RS and the panel ID may be set by being included in the UL TCI status information, or may be set by being included in at least one of the resource setting information, spatial relationship information, etc., of the RS.
- the QCL type indicated by the UL TCI state may be an existing QCL type A-D or another QCL type, and may include a predefined spatial relationship, associated antenna ports (port index), etc.
- the UE may perform the UL transmission using the panel corresponding to the Panel ID.
- the Panel ID may be associated with a UL TCI state, and when a UL TCI state is assigned (or activated) for a given UL channel/signal, the UE may identify the panel to use for the UL channel/signal transmission according to the Panel ID associated with that UL TCI state.
- Transmission Power Control ⁇ Transmission power control for PUSCH>
- the transmission power of the PUSH is controlled based on the TPC command (also called a value, an increase/decrease value, a correction value, etc.) indicated by the value of a specific field (also called a TPC command field, etc.) in the DCI.
- TPC command also called a value, an increase/decrease value, a correction value, etc.
- a specific field also called a TPC command field, etc.
- the transmission power of the PUSCH in a PUSCH transmission occasion (also referred to as a transmission period, etc.) i (P PUSCH,b,f,c (i,j,q d ,l)) may be expressed by the following equation (1).
- the power control adjustment state may be set to have multiple states (e.g., two states) or a single state by higher layer parameters. Also, when multiple power control adjustment states are set, one of the multiple power control adjustment states may be identified by an index l (e.g., l ⁇ 0, 1 ⁇ ).
- the power control adjustment state may be called a PUSCH power control adjustment state, a first or second state, etc.
- a PUSCH transmission opportunity i is a predetermined period during which a PUSCH is transmitted, and may be composed of, for example, one or more symbols, one or more slots, etc.
- P CMAX,f,c (i) is, for example, the transmission power of a user terminal set for carrier f of serving cell c at transmission opportunity i (also referred to as maximum transmission power, UE maximum output power, etc.)
- P O_PUSCH,b,f,c (j) is, for example, a parameter related to a target received power set for active UL BWP b of carrier f of serving cell c in parameter set setting j (for example, a parameter related to a transmission power offset, also referred to as a transmission 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 PUSCH for transmission opportunity i in active UL BWP b of serving cell c and carrier f with subcarrier spacing ⁇ , and ⁇ b,f,c (j) is a value provided by higher layer parameters (e.g., also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factor, etc.).
- higher layer parameters e.g., also referred to as msg3-Alpha, p0-PUSCH-Alpha, fractional factor, etc.
- PL b,f,c (q d ) is, for example, the path loss (path loss compensation) calculated in the user terminal using the index q d of the reference signal for the downlink BWP (path loss reference RS, DL RS for path loss measurement, PUSCH-PathlossReferenceRS) associated with the active UL BWP b of carrier f of the serving cell c.
- path loss reference RS path loss reference RS
- DL RS for path loss measurement PUSCH-PathlossReferenceRS
- ⁇ TF,b,f,c (i) is the transmission power adjustment component (offset, transmission format compensation) for UL BWP b of carrier f of serving cell c.
- f b,f,c (i,l) is the TPC command-based value (e.g., power control adjustment state, accumulated value of TPC commands, closed loop value) of said power control adjustment state index l of active UL BWP of carrier f of serving cell c and transmission opportunity i, where l may be referred to as the closed loop index.
- the UE may calculate PL b,f,c (q d ) using RS resources from the SSB used to obtain the Master Information Block (MIB).
- MIB Master Information Block
- the set of RS resource indices may include one or both of a set of SS/PBCH block indices and a set of CSI-RS resource indices.
- the UE may identify an RS resource index qd in the set of RS resource indices.
- the UE may use the same RS resource index qd as for the corresponding PRACH transmission.
- RAR Random Access Response
- the UE may obtain a mapping between a set of values for the SRI field in DCI format 0_1 and a set of ID values of the pathloss reference RS from higher layer signaling (e.g., sri-PUSCH-PowerControl-Id in SRI-PUSCH-PowerControl).
- the UE may determine the RS resource index qd from the ID of the pathloss reference RS mapped to the SRI field value in DCI format 0_1 that schedules the PUSCH.
- the UE may use the same RS resource index q d for the PUCCH transmission in that PUCCH resource.
- the UE may use an RS resource index qd with a pathloss reference RS ID of zero.
- the RS resource index qd may be provided to the UE by a path loss reference index (e.g., pathlossReferenceIndex) in the specified parameter.
- a configuration grant configuration e.g., ConfiguredGrantConfig
- the RS resource index qd may be provided to the UE by a path loss reference index (e.g., pathlossReferenceIndex) in the specified parameter.
- the UE may determine the RS resource index qd from the value of the ID of the pathloss reference RS mapped to the SRI field in the DCI format that activates the PUSCH transmission. If the DCI format does not include the SRI field, the UE may determine the RS resource index qd with a pathloss reference RS ID of zero.
- the transmission power of the PUCCH is controlled based on the TPC command (also called a value, an increase/decrease value, a correction value, an instruction value, etc.) indicated by the value of a specified field (also called a TPC command field, a first field, etc.) in the DCI.
- TPC command also called a value, an increase/decrease value, a correction value, an instruction value, etc.
- a specified field also called a TPC command field, a first field, etc.
- the transmission power of a PUCCH in a PUCCH transmission occasion (also referred to as a transmission period, etc.) i for an active UL BWP b of a carrier f of a serving cell c (P PUCCH,b,f,c (i,q u ,q d ,l)) may be expressed by the following equation (2).
- the power control adjustment state may be referred to as the PUCCH power control adjustment state, the first or second state, etc.
- PUCCH transmission opportunity i is a predetermined period during which PUCCH is transmitted, and may be composed of, for example, one or more symbols, one or more slots, etc.
- P CMAX,f,c (i) is, for example, the transmission power of a user terminal set for carrier f of serving cell c at transmission opportunity i (also referred to as maximum transmission power, UE maximum output power, etc.)
- P O_PUCCH,b,f,c (q u ) is, for example, a parameter related to a target received power set for active UL BWP b of carrier f of serving cell c at transmission opportunity i (for example, a parameter related to a transmission power offset, also referred to as a transmission power offset P0 or a target received power parameter, etc.).
- M PUCCH RB,b,f,c (i) is, for example, the number of resource blocks (bandwidth) allocated to PUCCH for transmission opportunity i in active UL BWP b of carrier f of serving cell c and subcarrier spacing ⁇ .
- PL b,f,c (q d ) is, for example, the path loss calculated in the user terminal using index q d of the reference signal for the downlink BWP (pathloss reference RS, DL RS for pathloss measurement, PUCCH-PathlossReferenceRS) associated with active UL BWP b of carrier f of serving cell c.
- ⁇ F — PUCCH (F) is a higher layer parameter given per PUCCH format.
- ⁇ TF,b,f,c (i) is a transmission power adjustment component (offset) for UL BWP b of carrier f of serving cell c.
- g b,f,c (i,l) is the TPC command based value (e.g., power control adjustment state, accumulated value of TPC commands, value due to closed loop, PUCCH power adjustment state) of said power control adjustment state index l of active UL BWP of carrier f of serving cell c and transmission opportunity i.
- TPC command based value e.g., power control adjustment state, accumulated value of TPC commands, value due to closed loop, PUCCH power adjustment state
- l ⁇ 0, 1 ⁇ . If the UE is not provided with information indicating the use of two PUCCH power control adjustment states or spatial relationship information for PUCCH, l may be 0.
- the UE may obtain a mapping between the PUCCH spatial relation information ID (pucch-SpatialRelationInfoId) value and the closed loop index (closedLoopIndex, power adjustment state index l) by an index provided by the P0 ID for PUCCH (p0-PUCCH-Id in p0-Set in PUCCH-PowerControl in PUCCH-Config). If the UE receives an activation command containing a value of PUCCH spatial relation information ID, the UE may determine the value of the closed loop index that provides the value of l through a link to the corresponding P0 ID for PUCCH.
- PUCCH spatial relation information ID pump-SpatialRelationInfoId
- the UE may determine the value of l from the value of qu based on the PUCCH spatial relationship information associated with the P0 ID for PUCCH corresponding to qu and the closed-loop index value corresponding to l.
- Qu may be a P0 ID for PUCCH (p0-PUCCH-Id) indicating P0 for PUCCH (P0-PUCCH) in a P0 set for PUCCH (p0-Set).
- the transmission power of a Sounding Reference Signal (SRS) in a transmission occasion (also referred to as a transmission period) i for an active UL BWP b of a carrier f of a serving cell c (P SRS,b,f,c (i,q s ,l)) may be expressed by the following equation (3).
- SRS Sounding Reference Signal
- the power control adjustment state may be referred to as the SRS power control adjustment state, a value based on the TPC command, an accumulated value of the TPC command, a value by a closed loop, a first or second state, etc. l may be referred to as a closed loop index.
- an SRS transmission opportunity i is a predetermined period during which an SRS is transmitted, and may be composed of, for example, one or more symbols, one or more slots, etc.
- P CMAX,f,c (i) is, for example, the UE maximum output power for carrier f of serving cell c at SRS transmission opportunity i
- P O_SRS,b,f,c (q s ) is a parameter related to the target received power provided by p0 for the active UL BWP b of carrier f of serving cell c and the SRS resource set q s (provided by SRS-ResourceSet and SRS-ResourceSetId) (e.g., a parameter related to a transmit power offset, also referred to as a transmit power offset P0 or a target received power parameter, etc.).
- M SRS,b,f,c (i) is the SRS bandwidth in number of resource blocks for SRS transmission opportunity i on active UL BWP b of carrier f of serving cell c and subcarrier spacing ⁇ .
- ⁇ SRS,b,f,c (q s ) is given by ⁇ (eg, alpha) for the active UL BWP b of serving cell c and carrier f with subcarrier spacing ⁇ , and the SRS resource set q s .
- PL b,f,c (q d ) is the DL pathloss estimate [dB] calculated by the UE for the active DL BWP of serving cell c and SRS resource set q s using RS resource index q d , which is the pathloss reference RS (DL RS for pathloss measurement, e.g., provided by pathlossReferenceRS) associated with SRS resource set q s and is an SS/PBCH block index (e.g., ssb-Index) or a CSI-RS resource index (e.g., csi-RS-Index).
- DL RS for pathloss measurement e.g., provided by pathlossReferenceRS
- SS/PBCH block index e.g., ssb-Index
- CSI-RS resource index e.g., csi-RS-Index
- h b,f,c (i,l) is the SRS power control adjustment state for the active UL BWP of carrier f of serving cell c and SRS transmission opportunity i. If the SRS power control adjustment state configuration (e.g., srs-PowerControlAdjustmentStates) indicates the same power control adjustment state for SRS and PUSCH transmissions, then h b,f,c (i,l) is the same as the current PUSCH power control adjustment state f b,f,c (i,l).
- SRS power control adjustment state configuration e.g., srs-PowerControlAdjustmentStates
- a transmission opportunity i for PUSCH, PUCCH, and SRS may be defined by a slot index n s,f ⁇ within a frame of system frame number SFN, the first symbol S in the slot, and the number of consecutive symbols L.
- the transmission opportunity for PUSCH may be a nominal repetition.
- MPE Maximum Permitted Exposure
- FCC Federal Communication Commission
- P-MPR/PMPR power-management maximum power reduction
- CA non-carrier aggregation
- EIRP max be the maximum value of the corresponding measured peak Effective Isotropic Radiated Power (EIRP).
- P-MPR f,c be a value indicating the reduction in the maximum output power allowed for carrier f of serving cell c.
- P-MPR f,c is introduced into the equation for the configured UE maximum output power P CMAX,f,c for carrier f of serving cell c.
- the corresponding total radiated power P TMAX,f,c is such that P TMAX,f,c ⁇ TRP max .
- the UE maximum output power P CMAX,f,c is set such that the corresponding P UMAX,f,c satisfies equation (5) below.
- the total radiated power P TMAX is bounded such that P TMAX ⁇ TRP max .
- the UE may set its maximum output power as P CMAX such that the measured peak EIRP (P UMAX ) is within the lower and upper limits and the measured total radiated power P TMAX satisfies P TMAX ⁇ TRP ma .
- Multi-TRP In NR, one or more transmission/reception points (TRPs) (multi-TRPs (M-TRPs)) are considered to perform DL transmission to a UE using one or more panels (multi-panels). It is also considered that a UE performs UL transmission to one or more TRPs.
- TRPs transmission/reception points
- M-TRPs multi-TRPs
- a UE performs UL transmission to one or more TRPs.
- the UE may determine a precoder for PUSCH transmission based on the SRI, a Transmitted Rank Indicator (TRI), and the TPMI.
- the UE may determine a precoder for PUSCH transmission based on the SRI.
- the SRI may be specified to the UE by the DCI or may be provided by higher layer parameters.
- Option 1 A field indicating multiple (e.g., two) SRI/TPMIs is used to indicate SRI/TPMI (values) for multiple (e.g., two) TRPs; - Option 2: A field indicating one SRI/TPMI is indicated, and a code point corresponding to multiple (e.g., two) SRI/TPMI values is set in the field indicating the SRI/TPMI.
- each code point of multiple SRI/TPMI fields may correspond to one TPMI value.
- the correspondence (association) between the SRI/TPMI fields and the SRI/TPMI values may be defined in advance in the specifications. Furthermore, the correspondence (association) between the SRI/TPMI fields and the SRI/TPMI values may use the correspondence defined up to Rel. 16, or may be the correspondence defined in Rel. 17 or later. The correspondence between the SRI/TPMI fields and the SRI/TPMI values may be different for each of the multiple SRI/TPMI fields.
- a code point indicating one SRI/TPMI field may correspond to multiple (e.g., two) SRI/TPMI values.
- the correspondence (association) between the SRI/TPMI field and the SRI/TPMI value may be predefined in the specification, or may be notified/set/activated by RRC signaling/MAC CE.
- a single PUSCH transmission/repeated PUSCH transmission using a single TRP (Single TRP (STRP)) and repeated PUSCH transmission using multiple TRPs (Multi TRP (MTRP)) will be dynamically indicated/switched by DCI.
- This dynamic switching may use a specific field included in DCI defined up to Rel. 16, or a specific field defined in Rel. 17 or later (e.g., a field for specifying STRP or MTRP operation).
- dynamic switch in this disclosure may mean “a switch that uses at least one of higher layer signaling and physical layer signaling.”
- switch in this disclosure may be interpreted interchangeably as switching, change, changing, applying, instructing, setting, etc.
- PHR Power Headroom Report
- PH power margin
- M-TRP PUSCH is supported/configured/enabled and reporting of two PHRs for two TRPs is configured/enabled, it is considered to include two PHRs (first PHR and second PHR) in the PHR MAC CE. Reporting of two PHRs for two TRPs may be configured for the UE by higher layer parameters (RRC parameters).
- RRC parameters higher layer parameters
- the first PHR may be reported as in Rel. 15/16.
- the second PHR may be a PHR of a different TRP than the first PHR.
- the second PHR may be reported as an actual PHR or as a virtual PHR.
- the actual PHR is a PHR based on an actual PUSCH transmission and may be referred to as a real PHR.
- the actual PHR may be calculated based on power control parameters for the actual PUSCH transmission.
- the virtual PHR is a PHR that is independent of the actual PUSCH transmission (based on the reference PUSCH transmission) and may be called the reference PHR, a PHR following a reference format, etc.
- the virtual PHR may be calculated based on the default power control parameters already specified in Rel. 15/16 NR, or may be calculated based on new default power control parameters.
- the UE determines that the type 1 power headroom report of the active serving cell is based on the actual PUSCH transmission, for PUSCH transmission opportunity i on active UL BWP b of carrier f of serving cell c, the UE calculates the type 1 power headroom report as shown in the following equation (6).
- the PHR in equation (6) may be referred to as the actual PHR.
- the UE determines that the type 1 power headroom report of the active serving cell is based on the reference PUSCH transmission, for PUSCH transmission opportunity i on active UL BWP b of carrier f of serving cell c, the UE calculates the type 1 power headroom report as shown in the following equation (7).
- the PHR in equation (7) may be referred to as the virtual PHR.
- A-MPR stands for Additional MPR.
- the PHR may be transmitted by MAC (Medium Access Control) signaling using a PUSCH (Physical Uplink Shared Channel).
- PUSCH Physical Uplink Shared Channel
- the PHR may be transmitted by using a PHR MAC CE (Control Element) included in a MAC PDU (Protocol Data Unit). This is used to notify.
- NR supports single entry PHR MAC CE for the primary cell (PCell).
- Figure 3 shows an example of a single-entry PHR MAC CE in Rel. 16 NR.
- Each 'R' in Figure 3 indicates a 1-bit reserved field, and is set to a value of '0', for example.
- 'PH Type 1, PCell
- 'PH indicates a 6-bit field that indicates an index for the type 1 PH of the primary cell (Primary Cell (PCell)).
- the index for the PH is associated with a specific PH value (in decibels (dB)) (or level).
- Type 1 PH may be a PH that takes into account the PUSCH (e.g., taking into account only the power of the PUSCH)
- Type 2 PH may be a PH that takes into account the PUCCH (e.g., taking into account the power of both the PUSCH and PUCCH)
- Type 3 PH may be a PH that takes into account the measurement reference signal (Sounding Reference Signal (SRS)) (e.g., taking into account the power of the PUSCH and SRS).
- SRS Sounding Reference Signal
- 'P CMAX,f,c ' denotes a 6-bit field, indicating an index for P CMAX,f,c used in the calculation of the PH field.
- the index for P CMAX,f,c is associated with a specific UE transmit power level (dB).
- P CMAX,f,c may be referred to as the UE's configured maximum transmit power (maximum allowed transmit power) for serving cell c of carrier f.
- P CMAX,f,c may be simply written as P CMAX , PCMAX , etc.
- 'P' in FIG. 3 may be a field related to Power Management Maximum Power Reduction (P-MPR) or Maximum Permitted UE Output Power Reduction for the serving cell c, or may be a field related to Maximum Permitted Exposure (MPE).
- 'MPE' in FIG. 3 may be a field related to MPE. Fields such as 'P' and 'MPE' may be replaced with an 'R' field depending on the settings using higher layer signaling to the UE.
- the 'P' field is set to FR2 MPE reporting (higher layer parameter mpe-Reporting-FR2) and is set to 0 if the P-MPR value applied to satisfy the MPE requirement is less than a specific P-MPR value (e.g., P-MPR_00) when the serving cell operates in FR2, otherwise it is set to 1.
- the 'P' field may also indicate whether power back-off is applied for power management if FR2 MPE reporting is not configured or if the serving cell operates in FR1, and is set to 1 if the corresponding P_CMAX field would have a different value if power back-off was not applied for power management.
- the 'MPE' field may indicate the power backoff to be applied to satisfy the MPE requirement if MPE reporting for FR2 (higher layer parameter mpe-Reporting-FR2) is set, the serving cell operates in FR2, and the 'P' field is set to 1.
- This field may indicate an index corresponding to the measured P-MPR value (e.g. in dB).
- the R field (the R bit) may be present instead of the 'MPE' field.
- the NR also supports multiple entry PHR MAC CE, which contains multiple pieces of data similar to the single entry (2 octets) described above.
- the multiple entry PHR MAC CE may include a PH field for a Primary Secondary Cell (PSCell) and a Secondary Cell (SCell).
- the PCell and PSCell may also be called Special Cells (SpCells).
- Figure 4 shows an example of a multiple entry PHR MAC CE in Rel. 16 NR.
- the same fields as in Figure 3 will not be described again.
- the 6-bit fields containing the word 'PH' in Figure 4 indicate the corresponding type (e.g., types 1-3 described above) and PH field for the cell.
- Type 2 PH field for an SpCell of another MAC entity may be set by the higher layer parameter phr-Type2OtherCell being true.
- the 6-bit field including the wording 'P CMAX,f,c ' in Fig. 4 is a P CMAX,f,c field indicating the P CMAX,f,c used in the calculation of the previous PH field.
- the number assigned to the “serving cell” in the PH field and the number assigned to the P CMAX,f,c field may not necessarily mean the serving cell index, and may simply mean the ordinal value included in the MAC CE.
- the network may transmit PHR configuration information regarding the conditions for triggering PHR to the UE.
- the PHR configuration information may include, for example, a prohibit timer, a periodic timer, and a path loss change threshold (phr-Tx-PowerFactorChange). Higher layer signaling may be used for the notification.
- the UE triggers PHR when the PHR trigger conditions are met.
- P CMAXpanel,f,c,p A setting example of the maximum transmission power (maximum transmission power) P CMAXpanel,f,c,p in the panel p of the carrier f of the serving cell c will be described.
- P CMAXpanel,f,c,p may be expressed as P CMAX,f,c,p .
- the UE may receive a configuration (e.g., a configuration similar to that of Rel. 17) regarding the maximum transmission power for each serving cell and each carrier, and may determine the maximum transmission power for each panel based on the configuration.
- the maximum transmission power of carrier f of serving cell c is set as P CMAX,f,c
- the UE may determine the maximum transmission power P CMAX,f,c,p of each panel p based on the P CMAX,f, c, or may determine the maximum transmission power P CMAX,f,c,p based on the relationship between P CMAX,f,c and P CMAX,f,c,p .
- the P CMAX,f,c and the relationship may be set in the UE by higher layer signaling/physical layer signaling. The following examples are given for the maximum transmission power for each panel in this case.
- the UE may determine the maximum transmission power P CMAX,f,c,p of panel p based on the following formula (8), where N is the number of panels instructed to transmit simultaneously. That is, the maximum transmission power of each panel may be the same.
- N may be 2 when simultaneous multi-panel transmission is instructed.
- N may be 1 when single-panel transmission is instructed.
- N may follow at least one of a value set by the network (base station) through higher layer signaling/physical layer signaling and the UE capabilities. Different values may be applied to N in the case of single-panel transmission and in the case of multi-panel transmission.
- the UE may determine the maximum transmission power P CMAX,f,c,p of panel p based on the following formula (9). That is, the sum of the maximum transmission powers of each panel p may be the maximum transmission power of the UE.
- Np is a value for panel p and may be different for each panel. That is, the maximum transmission power of each panel may be different.
- Np may be based on at least one of the values set by higher layer signaling/physical layer signaling from the network (base station) and the UE capabilities. Different values of Np may be applied in the case of single panel transmission and the case of multi-panel transmission.
- the UE may determine the maximum transmission power P CMAX,f,c,p of the panel p based on the following formula (10).
- the sum of the maximum transmission powers of the panels p may be the maximum transmission power of the UE.
- the maximum transmission powers of the panels may be the same or different, or the maximum transmission powers of some panels may be the same.
- the second PHR for the second TRP may be defined as follows (1) to (3). (1) If the first PHR is the actual PHR and the repetition of the PUSCH associated with the second TRP is in slot n, then the second PHR is the actual PHR. (2) If the first PHR is an actual PHR and is not the PUSH recurrence slot n associated with the second TRP, the second PHR is a virtual PHR. (3) If the first PHR is a virtual PHR, the second PHR is a virtual PHR.
- the virtual PHR may be calculated using the default power control parameters (p0, alpha ( ⁇ ), PL-RS, closed loop index) for each TRP.
- the UE shall provide the following two types of first power headroom reports (1) and (2).
- (1) and (2) it is assumed that the UE provides a first type 1 PHR for the actual PUSCH repetition of the earliest PUSCH transmission in the slot associated with one SRS resource set.
- the UE If the UE transmits a PUSCH repetition associated with another SRS resource set in slot n, the UE provides a second type-1 power headroom report for the first actual PUSCH repetition associated with the other SRS resource set that overlaps with slot n. (2) Otherwise (if condition (1) is not met), the UE provides a second type-1 power headroom report for a reference PUSCH transmission associated with another SRS resource set.
- a "panel” may refer to a value (or set of values) of UE capability as in Rel. 17. Also, a “panel” may refer to an equivalent definition of other terms, such as a "UE antenna group.”
- TRP may indicate spatial relations/TCI/Spatial Relation Information (SRI).
- SRI spatial Relation Information
- TRP may reference CORESETPool/SRS resource set.
- S-DCI Single DCI
- SDM Space Division Multiplexing
- S-DCI Frequency Division Multiplexing (FDM)-A scheme Different portions of the frequency domain resources of one PUSCH transmission opportunity are transmitted from different UE beams/panels.
- S-DCI FDM-B method A method in which two PUSCH transmission opportunities for the same/different RV of the same TB are transmitted from different UE beams/panels on non-overlapping frequency domain resources and the same time domain resources.
- S-DCI SFN-based transmission scheme Transmit the same PUSCH/DMRS simultaneously from two different UE beams/panels.
- S-DCI spatial domain repetition scheme Two PUSCH transmission opportunities with different redundancy versions (RVs) of the same TB are transmitted from two different UE beams/panels on the same time and frequency resources.
- RVs redundancy versions
- M-DCI scheme A scheme in which two overlapped (fully/partially overlapped in the time domain, fully/partially overlapped or non-overlapping in the frequency domain) PUSHs are transmitted from two different UE beams/panels.
- Simultaneous multi-panel transmission is based on the premise of multi-TPR, taking into account that one panel corresponds to one TRP. Therefore, in this disclosure, the PUSCH associated with a panel can also be referred to as the PUSCH associated with a TRP, and the PHR/power of a panel can also be referred to as the PHR/power of a TRP.
- a UE may receive PUSCH/SRS in one panel and PUCCH/SRS in time resources that fully/partially overlap with PUSCH reception in another panel (simultaneous multi-panel reception).
- the "single panel transmission" in this disclosure may be applied only when there is a PUSCH transmission with a single panel and there is no PUCCH/SRS transmission in other panels on time resources that completely/partially overlap with the PUSCH transmission. Note that in this case, further consideration is required as to how to handle PHR reporting, for example, in the case of PUSCH+SRS, one Type 1 PHR based on PUSCH and one Type 3 PHR based on SRS should be reported.
- single panel transmission in this disclosure may also apply to the case where there is a PUSCH transmission with a single panel and there is a PUCCH/SRS transmission with another panel in a time resource that fully/partially overlaps with the PUSCH transmission.
- P panel_actual,c,p is the actual transmit power of serving cell c, panel p
- P panel_max,c,p is the maximum UL transmit power of serving cell c, panel p.
- P panel_actual,c,p is the actual transmit power of serving cell c, panel p
- P panel_max,c,p is the maximum UL transmit power of serving cell c, panel p.
- P panel_actual,c,p is the actual transmit power of panel p of serving cell c
- P cell_max,c is the maximum UL transmit power of serving cell c.
- PHR may be triggered based on at least one of the following events/conditions: When the PHR prohibition timer (phr-ProhibitTimer) expires/has expired and the MAC entity has UL resources for a new transmission and the path loss has changed by more than a predefined threshold (phr-Tx-PowerFactorChange (dB)) for at least one reference signal used as a path loss reference for one activated Serving Cell corresponding to any MAC entity whose active DL BWP is not a dormant BWP since the last transmission of the PHR at that MAC entity.
- phr-ProhibitTimer the PHR prohibition timer
- dB phr-Tx-PowerFactorChange
- the PHR prohibition timer (phr-ProhibitTimer) expires (expires)/has expired (has expired) and the MAC entity has UL resources for a new transmission and the following is satisfied for an activated serving cell (activated Serving Cell) corresponding to any MAC entity with UL configured: - When there are UL resources allocated for transmission/PUCCH transmission in this cell (the activated serving cell) and the requested power backoff for power management for this cell has changed by more than a predefined threshold (phr-Tx-PowerFactorChange (dB)) since the last transmission of the PHR.
- a predefined threshold phr-Tx-PowerFactorChange (dB)
- the PHR may be referred to as an "MPE P-MPR report".
- a predefined threshold phr-Tx-PowerFactorChange (dB)
- the inventors therefore came up with a method for controlling PHR according to the scenario in which it is applied.
- A/B and “at least one of A and B” may be interpreted as interchangeable.
- A/B/C may mean “at least one of A, B, and C.”
- Radio Resource Control RRC
- RRC parameters RRC parameters
- RRC messages higher layer parameters, fields, information elements (IEs), settings, etc.
- IEs information elements
- CE Medium Access Control
- update commands activation/deactivation commands, etc.
- the higher layer signaling may be, for example, any one of Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, other messages (e.g., messages from the core network such as positioning protocols (e.g., NR Positioning Protocol A (NRPPa)/LTE Positioning Protocol (LPP)) messages), or a combination of these.
- RRC Radio Resource Control
- MAC Medium Access Control
- LPP LTE Positioning Protocol
- the MAC signaling may use, for example, a MAC Control Element (MAC CE), a MAC Protocol Data Unit (PDU), etc.
- the broadcast information may be, for example, a Master Information Block (MIB), a System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.
- MIB Master Information Block
- SIB System Information Block
- RMSI Remaining Minimum System Information
- OSI System Information
- the physical layer signaling may be, for example, Downlink Control Information (DCI), Uplink Control Information (UCI), etc.
- DCI Downlink Control Information
- UCI Uplink Control Information
- index identifier
- indicator indicator
- resource ID etc.
- sequence list, set, group, cluster, subset, etc.
- TRP
- the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be read as interchangeable.
- ID spatial relationship information
- TCI state and TCI may be read as interchangeable.
- the spatial relationship information identifier (ID) (TCI state ID) and the spatial relationship information (TCI state) may be read as interchangeable.
- ID spatial relationship information
- TCI state and TCI may be read as interchangeable.
- multi-panel simultaneous transmission (simultaneous multi-panel transmission) and multi-panel simultaneous UL transmission (simultaneous multi-panel UL transmission) may be read as interchangeable.
- supporting and setting/instructing may be read as interchangeable.
- loop, power control loop, power control loop index, closed loop, open loop, and power control adjustment state may be read as interchangeable.
- transmission power and output power may be read as interchangeable.
- the power limit in this disclosure may refer to a limit based on maximum transmission power.
- the PHR in this disclosure may refer to the actual PHR, the virtual PHR, or both the actual PHR and the virtual PHR.
- p and q in this disclosure may refer to panel indexes.
- multi-TRP MTRP, M-TRP
- multi-TRP system multi-TRP transmission
- multi-PDSCH multi-PDSCH
- PHR PH
- PH field PH value
- a PH field may be read as a PH field of a certain type (e.g., type 1/2/3/X).
- the PHR MAC CE may include fields for each of multiple serving cells (such as a PCMAX field and a P field).
- PCMAX field/P-MPR value/power backoff corresponding to/for/of the PH field may be read as “PCMAX field/P-MPR value/power backoff corresponding to/for/of the PUSCH transmission corresponding to the PH field.”
- P-MPR P-MPR value
- power backoff may be interpreted as interchangeable.
- UL transmission (UL Tx)/PHR related to a panel and UL transmission (UL Tx)/PHR related to a TRP may be read as interchangeable.
- the first embodiment corresponds to analysis 1 and relates to events/conditions for triggering PHR in simultaneous multi-panel transmission of PUSCH.
- the method of simultaneous multi-panel transmission of PUSCH can apply each of the above-mentioned schemes.
- different schemes may be applied for each option.
- Which scheme to apply for each option may be predefined by the specifications, may be set by higher layer signaling, or may be reported by UE capabilities.
- single DCI-based simultaneous multi-panel transmission the same method for triggering/reporting (transmission) PHR as in single DCI-based multi-TRP repetition transmission may be applied.
- ideal backhaul is taken into account, so that UL transmission is scheduled for both (respective) of the multi-TRPs by the single DCI. Therefore, the same method as in single DCI-based multi-TRP repetition transmission can be adopted.
- multi-DCI based simultaneous multi-panel transmission individual PHR triggering/reporting (transmission) methods may be applied.
- UL transmission corresponding to each TRP is scheduled by the DCI corresponding to each TRP. Therefore, a unique PHR may be required for each TRP. That is, PHR triggering/reporting (transmission) per TRP may be supported.
- the serving cell is configured for simultaneous multi-panel transmission of PUSCH
- the serving cell is configured with two codebook (CB)/non-codebook (NCB) SRS resource sets
- the serving cell is configured with certain upper layer parameters
- the event/condition for triggering a PHR for a serving cell may be at least one of the following options 1-2.
- option 1 is suitable for single DCI-based simultaneous multi-panel transmission
- option 2 may be applied to multiple DCI-based simultaneous multi-panel transmission.
- the application of option 1/option 2 may be switched based on higher layer signaling/physical layer signaling.
- the condition for triggering PHR for each serving cell is described.
- PHR is triggered when a specific event occurs in the serving cell.
- the trigger condition/event for PHR in a serving cell configured with simultaneous multi-panel transmission of PUSCH may be at least one of the following:
- Option 1.1 concerns the PHR prohibit timer (phr-prohibitTimer).
- Alt.1 phr-prohibitTimer may be set per serving cell. If the serving cell's phr-ProhibitTimer expires/has expired, PHR may be triggered.
- Alt.2-2 If the phr-ProhibitTimer of any one of the two panels/TRPs configured in the serving cell has expired/has expired, a PHR may be triggered.
- Alt.2-3 If the phr-ProhibitTimer of a specific panel/TRP (e.g., the first panel/TRP) among two panels/TRPs configured in a serving cell has expired/has expired, a PHR may be triggered.
- a specific panel/TRP e.g., the first panel/TRP
- Option 1.2 concerns (changes in) path loss.
- Alt. 1 If the path loss has changed by more than a predefined threshold (phr-Tx-PowerFactorChange) in both (two) panels/TRPs/reference signals of the serving cell, PHR may be triggered.
- Alt. 2 If the path loss in any one of the two panels/TRPs/reference signals corresponding to the serving cell has changed by more than a predetermined threshold (phr-Tx-PowerFactorChange), the PHR may be triggered.
- a predetermined threshold phr-Tx-PowerFactorChange
- a specific panel/TRP/reference signal e.g., the first panel/TRP/reference signal
- the predetermined threshold phr-Tx-PowerFactorChange
- the predetermined threshold may be set for each panel/TRP/reference signal.
- Option 1.3 concerns the PHR periodic timer (phr-PeriodicTimer).
- Alt.1 phr-PeriodicTimer may be configured per serving cell. If the phr-PeriodicTimer of the serving cell has expired, PHR may be triggered.
- Alt.2 phr-PeriodicTimer may be set per panel/TRP.
- Alt.2-1 If all (e.g., two) phr-PeriodicTimers per panel/TRP configured in the serving cell have expired/has expired, a PHR may be triggered.
- Alt.2-2 If the phr-PeriodicTimer of any one of the two panels/TRPs configured in the serving cell has expired/has expired, a PHR may be triggered.
- Alt.2-3 If the phr-PeriodicTimer of a specific panel/TRP (e.g., the first panel/TRP) among two panels/TRPs configured in a serving cell has expired/has expired, a PHR may be triggered.
- a specific panel/TRP e.g., the first panel/TRP
- Option 1.4 concerns Power-management Maximum Power Reduction (PMPR (change)).
- Alt.1 PMPR may be configured per serving cell. If the requested power backoff due to the serving cell's power management (allowed by the PMPR corresponding to a serving cell as defined by the specification) has changed by more than a predefined threshold (phr-Tx-PowerFactorChange), PHR may be triggered.
- phr-Tx-PowerFactorChange a predetermined threshold
- Alt.2-2 If the requested power backoff due to the power management of the serving cell has changed by more than a predetermined threshold (phr-Tx-PowerFactorChange) in any one of the two panels/TRPs corresponding to the serving cell, a PHR may be triggered.
- Alt.2-3 A PHR may be triggered if the requested power backoff due to the power management of the serving cell has changed by more than a predetermined threshold (phr-Tx-PowerFactorChange) in a specific panel/TRP (e.g., the first panel/TRP) of the two panels/TRPs corresponding to the serving cell.
- the predefined threshold (phr-Tx-PowerFactorChange) may be set per panel/TRP.
- Option 1.5 concerns the MPE Prohibit Timer (mpe-ProhibitTimer). If mpe-Reporting-FR2 is set, at least one of the following conditions may apply:
- Alt. 1 mpe-ProhibitTimer may be set per serving cell. If the mpe-ProhibitTimer of the serving cell is not running, PHR may be triggered.
- Alt.2 mpe-ProhibitTimer may be set per panel/TRP.
- Alt.2-1 If all (e.g., two) mpe-ProhibitTimers per panel/TRP configured in the serving cell are not running, a PHR may be triggered.
- Alt.2-2 If the mpe-ProhibitTimer of any one of the two panels/TRPs configured in the serving cell is not running, a PHR may be triggered.
- Alt.2-3 If the mpe-ProhibitTimer of a specific panel/TRP (e.g., the first panel/TRP) among two panels/TRPs configured in a serving cell is not running, a PHR may be triggered.
- Option 1.6 concerns PMPR for FR2 MPE. If mpe-Reporting-FR2 is set, at least one of the following conditions may apply:
- Alt.1 PMPR may be configured per serving cell. If the measurement value of PMPR applied to meet the requirements of FR2 MPE defined in the specification is equal to or greater than a predefined threshold (mpe-Threshold), PHR may be triggered.
- Alt. 2-2 If the measured value of the PMPR is equal to or greater than a predetermined threshold (mpe-Threshold) in any one of the two panels/TRPs corresponding to the serving cell, a PHR may be triggered.
- a PHR may be triggered.
- the predefined threshold mpe-Threshold may be set for each panel/TRP.
- Option 1.7 concerns (changes in) PMPR for FR2 MPE. If mpe-Reporting-FR2 is set, at least one of the following conditions may apply:
- Alt.1 PMPR may be configured per serving cell. If the measurement of PMPR applied to meet the requirements of FR2 MPE defined in the specification has changed by more than a predefined threshold (phr-Tx-PowerFactorChange), PHR may be triggered.
- Alt.2-2 If the measured value of the PMPR has changed by more than a predetermined threshold (phr-Tx-PowerFactorChange) in any one of the two panels/TRPs corresponding to the serving cell, a PHR may be triggered.
- Alt.2-3 If the measured value of the PMPR has changed by more than a predetermined threshold (phr-Tx-PowerFactorChange) in a specific panel/TRP (e.g., the first panel/TRP) of two panels/TRPs corresponding to a serving cell, a PHR may be triggered.
- the predefined threshold (phr-Tx-PowerFactorChange) may be set per panel/TRP.
- the condition for triggering PHR for each panel/TRP of the serving cell is described.
- PHR is triggered when a certain event occurs in a certain panel/TRP of the serving cell.
- the trigger condition/event for PHR in a panel/TRP of the serving cell configured for simultaneous multi-panel transmission of PUSCH may be at least one of the following:
- Alt.1 phr-prohibitTimer may be set per panel/TRP. If the phr-prohibitTimer set on a panel/TRP expires/has expired, PHR may be triggered.
- Alt.2 If the path loss has changed by more than a predefined threshold (phr-Tx-PowerFactorChange) corresponding to the panel/TRP, the PHR may be triggered. Variation: phr-Tx-PowerFactorChange may be set per panel/TRP.
- Alt.3 phr-PeriodicTimer may be set per panel/TRP. If the phr-PeriodicTimer set in the panel/TRP expires/has expired, PHR may be triggered.
- Alt. 4 PMPR may be set per panel/TRP. If the requested power backoff by the power management of the panel/TRP has changed by more than a predefined threshold (phr-Tx-PowerFactorChange), PHR may be triggered. Variation: phr-Tx-PowerFactorChange may be set per panel/TRP.
- Alt.5 When mpe-Reporting-FR2 is set. The mpe-ProhibitTimer may be set for each panel/TRP. If the mpe-ProhibitTimer set for each panel/TRP is not running, the PHR may be triggered.
- Alt.6 When mpe-Reporting-FR2 is set. The PMPR may be set for each panel/TRP.
- a predefined threshold mpe-Threshold
- mpe-Threshold may be set per panel/TRP.
- Alt.7 If mpe-Reporting-FR2 is set. If the measured PMPR has changed by more than a predefined threshold (phr-Tx-PowerFactorChange), a PHR may be triggered.
- the predefined threshold phr-Tx-PowerFactorChange
- the predefined threshold may be set per panel/TRP.
- the UE can appropriately control the execution (trigger) of PHR in simultaneous multi-panel transmission of PUSCH.
- the second embodiment corresponds to analysis 2 and relates to multi-DCI based simultaneous multi-panel transmission, and in particular describes MAC CE for PHR.
- the method of simultaneous multi-panel transmission of PUSCH can be any of the above-mentioned schemes.
- the above-mentioned scheme 5 may be applied.
- the serving cell is configured with multi-DCI-based simultaneous multi-panel PUSCH transmission; the serving cell is configured with two codebook (CB)/non-codebook (NCB) SRS resource sets; the serving cell is configured with two CORESETPoolIndexes and the two CORESETPoolIndexes are associated with the two codebook (CB)/non-codebook (NCB) SRS resource sets; and the serving cell is configured with certain upper layer parameters.
- CB codebook
- NCB non-codebook
- MAC CE for PHR, PHR MAC CE, single-entry PHR MAC CE, and MAC CE may be read as interchangeable.
- FIG. 5 is a diagram showing an overview of PHR transmission.
- the UE may receive a setting of a limit on transmission power for each panel/cell.
- the UE controls transmission (reporting) of at least one of a power headroom (PHR) based on actual PUSCH transmission (first PHR/actual PHR) and a PHR independent of actual PUSCH transmission (second PHR/virtual PHR) based on the setting.
- the limit may be a maximum UL transmission power, for example, a maximum UL transmission power for each panel.
- the UE may also determine the maximum UL transmission power based on the capability.
- At least one of the first PHR and the second PHR may also be based on a single panel transmission.
- the PHR may be transmitted by MAC signaling using the PUSCH.
- the PHR may be notified using a PHR MAC Control Element (CE) included in the MAC PDU.
- CE PHR MAC Control Element
- NR supports single entry PHR MAC CE for the primary cell (PCell).
- FIGS 6A to 6D show an example of a MAC CE for PHR according to the second embodiment.
- One MAC CE may include a PHR corresponding to one panel/TRP for a serving cell. Which panel/TRP's PHR is included in one MAC CE can be distinguished by different Logical Channel IDs (LCIDs) or indications in the MAC CE fields. The number of bits for each field shown below is merely an example.
- LCIDs Logical Channel IDs
- 'R' indicates a 1-bit reserved field, and is set to a value of '0', for example.
- 'TRP ID' indicates a 1-bit field, and is set to a value of '0'/'1', for example.
- 'PH (power headroom)' may indicate a 6-bit field.
- the field may indicate an index related to the PH of a serving cell.
- the field may indicate an index related to the PH for each type of cell (e.g., PCell/SpCell).
- the index related to the PH may be associated with a specific PH value (in decibels (dB)) (or level).
- the MAC CE may further include a field related to PMPR/P CMAX .
- 'PMPR' may indicate a 2-bit field, which may be a field for Power Management Maximum Power Reduction (P-MPR) for serving cell c.
- 'P CMAX ' may indicate a 6-bit field, which may indicate an index for P CMAX,f,c used in the calculation of the PH field.
- the index for P CMAX,f,c is associated with a specific UE transmit power level (dB).
- P CMAX,f,c may be referred to as the UE's configured maximum transmit power (maximum allowed transmit power) for serving cell c of carrier f.
- P CMAX,f,c may be simply denoted as P CMAX , PCMAX , etc.
- the MAC CE may include a field of 'V' instead of 'R'.
- 'V' may indicate a 1-bit field. This field indicates that the reported PHR is the actual PHR/virtual PHR. For example, when this field is set to a value of '0', it may indicate that the reported PHR is the actual PHR, and when this field is set to a value of '1', it may indicate that the reported PHR is the virtual PHR.
- MAC CE shown in Figure 6 is merely an example, and can be interpreted as appropriate with the MAC CE in Figures 3 and 4 described above.
- the UE may control the transmission of the MAC CE based on the conditions shown below.
- the conditions when one MAC CE includes a PHR corresponding to one panel/TRP are explained in Option 1
- the conditions when one MAC CE includes a PHR corresponding to two panels/TRPs are explained in Option 2.
- ⁇ Option 1> In a serving cell, when one MAC CE includes a PHR corresponding to one panel/TRP (TRP#X), the UE may control the transmission of the MAC CE based on at least one of the above conditions. That is, the transmission of the MAC CE may be controlled based on at least one of the following conditions.
- the MAC CE may be transmitted to the corresponding TRP (TRP#X).
- the MAC CE may be controlled to transmit according to any of Alt.1-3 below.
- Alt.1 MAC CE is sent only to the corresponding TRP (TRP#X).
- Alt.2 MAC CE is sent to the corresponding TRP (TRP#X) and also to other TRPs (TRP#Y).
- Alt.3 It may be up to the UE implementation whether the MAC CE is transmitted on either TRP or on both TRPs.
- the MAC CE may be controlled to transmit according to any of Alt.1-3 below.
- Alt.1 MAC CE is sent (only) to another TRP (TRP#Y).
- Alt.2 No MAC CE is sent.
- Alt.3 Whether the MAC CE is transmitted may be up to the UE implementation.
- the UE may control the transmission of the MAC CE based on at least one of the above conditions. That is, the transmission of the MAC CE may be controlled based on at least one of the following conditions.
- the MAC CE may be controlled to transmit according to any of Alt. 1-4 below.
- Alt.1 MAC CE is transmitted to only one TRP (either TRP #X or #Y). Which TRP MAC CE is transmitted to may depend on the UE implementation.
- Alt.2 MAC CE is transmitted to only one TRP (either TRP #X or #Y). The TRP to which the MAC CE is transmitted may be selected by a predetermined rule (defined by the specification)/network setting (configured/instructed by higher layer signaling/physical layer signaling).
- Alt.3 MAC CE is sent to both (two) TRPs (TRP #X, #Y).
- Alt. 4 Whether the MAC CE is transmitted to one TRP (TRP #X or #Y) or to both TRPs (TRP #X and #Y) may be up to the UE implementation.
- the UE can appropriately transmit/report the PHR using the MAC CE.
- any information may be notified to the UE (from a network (NW) (e.g., a base station (BS))) (in other words, any information is received from the BS by the UE) using physical layer signaling (e.g., DCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PDCCH, PDSCH, reference signal), or a combination thereof.
- NW network
- BS base station
- the MAC CE may be identified by including a new Logical Channel ID (LCID) in the MAC subheader that is not specified in existing standards.
- LCID Logical Channel ID
- the notification When the notification is made by a DCI, the notification may be made by a specific field of the DCI, a Radio Network Temporary Identifier (RNTI) used to scramble Cyclic Redundancy Check (CRC) bits assigned to the DCI, the format of the DCI, etc.
- RNTI Radio Network Temporary Identifier
- CRC Cyclic Redundancy Check
- notification of any information to the UE in the above-mentioned embodiments may be performed periodically, semi-persistently, or aperiodically.
- notification of any information from the UE (to the NW) may be performed using physical layer signaling (e.g., UCI), higher layer signaling (e.g., RRC signaling, MAC CE), a specific signal/channel (e.g., PUCCH, PUSCH, PRACH, reference signal), or a combination thereof.
- physical layer signaling e.g., UCI
- higher layer signaling e.g., RRC signaling, MAC CE
- a specific signal/channel e.g., PUCCH, PUSCH, PRACH, reference signal
- the MAC CE may be identified by including a new LCID in the MAC subheader that is not specified in existing standards.
- the notification may be transmitted using PUCCH or PUSCH.
- notification of any information from the UE may be performed periodically, semi-persistently, or aperiodically.
- At least one of the above-mentioned embodiments may be applied when a specific condition is satisfied, which may be specified in a standard or may be notified to a UE/BS using higher layer signaling/physical layer signaling.
- At least one of the above-described embodiments may be applied only to UEs that have reported or support a particular UE capability.
- the specific UE capabilities may indicate at least one of the following: - Supporting specific processing/operations/control/information for at least one of the above embodiments.
- the UE supports simultaneous multi-panel transmission and reception.
- the UE supports reporting/transmission of PHR for simultaneous multi-panel transmission/reception.
- the UE supports per-panel or per-cell power limiting for simultaneous multi-panel transmissions.
- the UE supports per-panel power limiting or per-cell power limiting for single-panel transmission (if simultaneous multi-panel transmission is supported).
- the above-mentioned specific UE capabilities may be capabilities that are applied across all frequencies (commonly regardless of frequency), capabilities per frequency (e.g., one or a combination of a cell, band, band combination, BWP, component carrier, etc.), capabilities per frequency range (e.g., Frequency Range 1 (FR1), FR2, FR3, FR4, FR5, FR2-1, FR2-2), capabilities per subcarrier spacing (SubCarrier Spacing (SCS)), or capabilities per Feature Set (FS) or Feature Set Per Component-carrier (FSPC).
- FR1 Frequency Range 1
- FR2 FR2, FR3, FR4, FR5, FR2-1, FR2-2
- SCS subcarrier Spacing
- FS Feature Set
- FSPC Feature Set Per Component-carrier
- the specific UE capabilities may be capabilities that are applied across all duplexing methods (commonly regardless of the duplexing method), or may be capabilities for each duplexing method (e.g., Time Division Duplex (TDD) and Frequency Division Duplex (FDD)).
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the UE configures/activates/triggers specific information related to the above-mentioned embodiments (or performs the operations of the above-mentioned embodiments) by higher layer signaling/physical layer signaling.
- the specific information may be information indicating that PHR reporting/transmission (PHR triggering) is enabled, any RRC parameters for a specific release (e.g., Rel. 18/19), etc.
- the UE may, for example, apply Rel. 15/16 operations.
- MAC CE Medium Access Control Element
- PHR power headroom
- UL uplink
- Wired communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
- communication is performed using any one of the wireless communication methods according to the above embodiments of the present disclosure or a combination of these.
- FIG. 7 is a diagram showing an example of a schematic configuration of a wireless communication system according to an embodiment.
- the wireless communication system 1 (which may simply be referred to as system 1) may be a system that realizes communication using Long Term Evolution (LTE) specified by the Third Generation Partnership Project (3GPP), 5th generation mobile communication system New Radio (5G NR), or the like.
- LTE Long Term Evolution
- 3GPP Third Generation Partnership Project
- 5G NR 5th generation mobile communication system New Radio
- the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
- MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
- RATs Radio Access Technologies
- MR-DC may include dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E-UTRA Dual Connectivity (NE-DC)), etc.
- E-UTRA Evolved Universal Terrestrial Radio Access
- EN-DC E-UTRA-NR Dual Connectivity
- NE-DC NR-E-UTRA Dual Connectivity
- the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
- the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
- the wireless communication system 1 may support dual connectivity between multiple base stations within the same RAT (e.g., dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
- dual connectivity in which both the MN and SN are NR base stations (gNBs) (NR-NR Dual Connectivity (NN-DC))).
- gNBs NR base stations
- N-DC Dual Connectivity
- the wireless communication system 1 may include a base station 11 that forms a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) that are arranged within the macrocell C1 and form a small cell C2 that is narrower than the macrocell C1.
- a user terminal 20 may be located within at least one of the cells. The arrangement and number of each cell and user terminal 20 are not limited to the embodiment shown in the figure. Hereinafter, when there is no need to distinguish between the base stations 11 and 12, they will be collectively referred to as base station 10.
- the user terminal 20 may be connected to at least one of the multiple base stations 10.
- the user terminal 20 may utilize at least one of carrier aggregation (CA) using multiple component carriers (CC) and dual connectivity (DC).
- CA carrier aggregation
- CC component carriers
- DC dual connectivity
- Each CC may be included in at least one of a first frequency band (Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2 (FR2)).
- Macro cell C1 may be included in FR1
- small cell C2 may be included in FR2.
- FR1 may be a frequency band below 6 GHz (sub-6 GHz)
- FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
- the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- the multiple base stations 10 may be connected by wire (e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.) or wirelessly (e.g., NR communication).
- wire e.g., optical fiber conforming to the Common Public Radio Interface (CPRI), X2 interface, etc.
- NR communication e.g., NR communication
- base station 11 which corresponds to the upper station
- IAB Integrated Access Backhaul
- base station 12 which corresponds to a relay station
- the base station 10 may be connected to the core network 30 directly or via another base station 10.
- the core network 30 may include at least one of, for example, an Evolved Packet Core (EPC), a 5G Core Network (5GCN), a Next Generation Core (NGC), etc.
- EPC Evolved Packet Core
- 5GCN 5G Core Network
- NGC Next Generation Core
- the core network 30 may include network functions (Network Functions (NF)) such as, for example, a User Plane Function (UPF), an Access and Mobility management Function (AMF), a Session Management Function (SMF), a Unified Data Management (UDM), an Application Function (AF), a Data Network (DN), a Location Management Function (LMF), and Operation, Administration and Maintenance (Management) (OAM).
- NF Network Functions
- UPF User Plane Function
- AMF Access and Mobility management Function
- SMF Session Management Function
- UDM Unified Data Management
- AF Application Function
- DN Data Network
- LMF Location Management Function
- OAM Operation, Administration and Maintenance
- the user terminal 20 may be a terminal that supports at least one of the 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
- 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 radio access method may also be called a waveform.
- other radio access methods e.g., other single-carrier transmission methods, other multi-carrier transmission methods
- a downlink shared channel (Physical Downlink Shared Channel (PDSCH)) shared by each user terminal 20, a broadcast channel (Physical Broadcast Channel (PBCH)), a downlink control channel (Physical Downlink Control Channel (PDCCH)), etc. may be used as the downlink channel.
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- PDCCH Physical Downlink Control Channel
- an uplink shared channel (Physical Uplink Shared Channel (PUSCH)) shared by each user terminal 20, an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)), etc. may be used as an uplink channel.
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- PRACH Physical Random Access Channel
- SIB System Information Block
- PDSCH User data, upper layer control information, System Information Block (SIB), etc.
- SIB System Information Block
- PUSCH User data, upper layer control information, etc.
- MIB Master Information Block
- PBCH Physical Broadcast Channel
- Lower layer control information may be transmitted by the PDCCH.
- the lower layer control information may include, for example, downlink control information (Downlink Control Information (DCI)) including scheduling information for at least one of the PDSCH and the PUSCH.
- DCI Downlink Control Information
- the DCI for scheduling the PDSCH may be called a DL assignment or DL DCI
- the DCI for scheduling the PUSCH may be called a UL grant or UL DCI.
- the PDSCH may be interpreted as DL data
- the PUSCH may be interpreted as UL data.
- a control resource set (COntrol REsource SET (CORESET)) and a search space may be used to detect the PDCCH.
- the CORESET corresponds to the resources to search for DCI.
- the search space corresponds to the search region and search method of PDCCH candidates.
- One CORESET may be associated with one or multiple search spaces. The UE may monitor the CORESET associated with a search space based on the search space configuration.
- a search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
- One or more search spaces may be referred to as a search space set. Note that the terms “search space,” “search space set,” “search space setting,” “search space set setting,” “CORESET,” “CORESET setting,” etc. in this disclosure may be read as interchangeable.
- the PUCCH may transmit uplink control information (UCI) including at least one of channel state information (CSI), delivery confirmation information (which may be called, for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.), and a scheduling request (SR).
- UCI uplink control information
- CSI channel state information
- HARQ-ACK Hybrid Automatic Repeat reQuest ACKnowledgement
- ACK/NACK ACK/NACK
- SR scheduling request
- the PRACH may transmit a random access preamble for establishing a connection with a cell.
- downlink, uplink, etc. may be expressed without adding "link.”
- various channels may be expressed without adding "Physical” to the beginning.
- a synchronization signal (SS), a downlink reference signal (DL-RS), etc. may be transmitted.
- a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DMRS), a positioning reference signal (PRS), a phase tracking reference signal (PTRS), etc. may be transmitted.
- the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
- a signal block including an SS (PSS, SSS) and a PBCH (and a DMRS for PBCH) may be called an SS/PBCH block, an SS Block (SSB), etc.
- the SS, SSB, etc. 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
- DMRS may also be called a user equipment-specific reference signal (UE-specific Reference Signal).
- the base station 8 is a diagram showing an example of a configuration of a base station according to an embodiment.
- the base station 10 includes a control unit 110, a transceiver unit 120, a transceiver antenna 130, and a transmission line interface 140.
- the control unit 110, the transceiver unit 120, the transceiver antenna 130, and the transmission line interface 140 may each be provided in one or more units.
- this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the base station 10 may also be assumed to have other functional blocks necessary for wireless communication. Some 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 configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.
- the control unit 110 may control signal generation, scheduling (e.g., resource allocation, mapping), etc.
- the control unit 110 may control transmission and reception using the transceiver unit 120, the transceiver antenna 130, and the transmission path interface 140, measurement, etc.
- the control unit 110 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 120.
- the control unit 110 may perform call processing of communication channels (setting, release, etc.), status management of the base station 10, management of radio resources, etc.
- the transceiver 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 transceiver unit 120 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
- the transceiver unit 120 may be configured as an integrated transceiver 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 reception unit may be composed of a reception processing unit 1212, an RF unit 122, and a measurement unit 123.
- the transmitting/receiving antenna 130 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
- the transceiver 120 may transmit the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
- the transceiver 120 may receive the above-mentioned uplink channel, uplink reference signal, etc.
- the transceiver 120 may form at least one of the transmit beam and the receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
- digital beamforming e.g., precoding
- analog beamforming e.g., phase rotation
- the transceiver 120 may perform Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (e.g., RLC retransmission control), Medium Access Control (MAC) layer processing (e.g., HARQ retransmission control), etc., on data and control information obtained from the control unit 110, and generate a bit string to be transmitted.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ retransmission control HARQ retransmission control
- the transceiver 120 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, Discrete Fourier Transform (DFT) processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- channel coding which may include error correction coding
- DFT Discrete Fourier Transform
- IFFT Inverse Fast Fourier Transform
- the transceiver unit 120 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 130.
- the transceiver unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 130.
- the transceiver 120 may apply reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
- reception processing such as analog-to-digital conversion, Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal, and acquire user data, etc.
- FFT Fast Fourier Transform
- IDFT Inverse Discrete Fourier Transform
- filtering demapping
- demodulation which may include error correction decoding
- MAC layer processing which may include error correction decoding
- the transceiver 120 may perform measurements on the received signal.
- the measurement unit 123 may perform Radio Resource Management (RRM) measurements, Channel State Information (CSI) measurements, etc. based on the received signal.
- the measurement unit 123 may measure received power (e.g., Reference Signal Received Power (RSRP)), received quality (e.g., Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)), signal strength (e.g., Received Signal Strength Indicator (RSSI)), propagation path information (e.g., CSI), etc.
- RSRP Reference Signal Received Power
- RSSI Received Signal Strength Indicator
- the measurement results may be output to the control unit 110.
- the transmission path interface 140 may transmit and receive signals (backhaul signaling) between devices included in the core network 30 (e.g., network nodes providing NF), other base stations 10, etc., and may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
- devices included in the core network 30 e.g., network nodes providing NF
- other base stations 10, etc. may acquire and transmit user data (user plane data), control plane data, etc. for the user terminal 20.
- the transmitter and receiver of the base station 10 in this disclosure may be configured with at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission path interface 140.
- the transceiver 120 may receive a physical uplink shared channel (PUSCH) transmitted from a terminal using simultaneous uplink (UL) transmission from multiple panels.
- the transceiver 120 may transmit configuration information for controlling the triggering of power headroom (PHR) based on the PUSCH transmission.
- PHR power headroom
- the transceiver 120 may receive a Medium Access Control Element (MAC CE) including the power headroom (PHR) for each serving cell or panel if simultaneous uplink (UL) transmission from multiple panels is supported.
- MAC CE Medium Access Control Element
- PHR power headroom
- the control unit 110 may control the reception of the MAC CE that the terminal determines based on specific conditions.
- the user terminal 20 includes a control unit 210, a transceiver unit 220, and a transceiver antenna 230. Note that the control unit 210, the transceiver unit 220, and the transceiver antenna 230 may each include one or more.
- this example mainly shows the functional blocks of the characteristic parts of this embodiment, and the user terminal 20 may also be assumed to have other functional blocks necessary for wireless communication. Some 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 configured from a controller, a control circuit, etc., which are described based on a common understanding in the technical field to which this disclosure pertains.
- the control unit 210 may control signal generation, mapping, etc.
- the control unit 210 may control transmission and reception using the transceiver unit 220 and the transceiver antenna 230, measurement, etc.
- the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transceiver unit 220.
- the transceiver unit 220 may include a baseband unit 221, 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 transceiver unit 220 may be composed of a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transceiver circuit, etc., which are described based on a common understanding in the technical field to which the present disclosure relates.
- the transceiver unit 220 may be configured as an integrated transceiver 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 reception unit may be composed of a reception processing unit 2212, an RF unit 222, and a measurement unit 223.
- the transmitting/receiving antenna 230 can be configured as an antenna described based on common understanding in the technical field to which this disclosure pertains, such as an array antenna.
- the transceiver 220 may receive the above-mentioned downlink channel, synchronization signal, downlink reference signal, etc.
- the transceiver 220 may transmit the above-mentioned uplink channel, uplink reference signal, etc.
- the transceiver 220 may form at least one of the transmit beam and receive beam using digital beamforming (e.g., precoding), analog beamforming (e.g., phase rotation), etc.
- digital beamforming e.g., precoding
- analog beamforming e.g., phase rotation
- the transceiver 220 may perform PDCP layer processing, RLC layer processing (e.g., RLC retransmission control), MAC layer processing (e.g., HARQ retransmission control), etc. on the data and control information acquired from the controller 210, and generate a bit string to be transmitted.
- RLC layer processing e.g., RLC retransmission control
- MAC layer processing e.g., HARQ retransmission control
- the transceiver 220 may perform transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- transmission processing such as channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), IFFT processing, precoding, and digital-to-analog conversion on the bit string to be transmitted, and output a baseband signal.
- Whether or not to apply DFT processing may be based on the settings of transform precoding.
- the transceiver unit 220 transmission processing unit 2211
- the transceiver unit 220 may perform DFT processing as the above-mentioned transmission processing in order to transmit the channel using a DFT-s-OFDM waveform, and when transform precoding is not enabled, it is not necessary to perform DFT processing as the above-mentioned transmission processing.
- the transceiver unit 220 may perform modulation, filtering, amplification, etc., on the baseband signal to a radio frequency band, and transmit the radio frequency band signal via the transceiver antenna 230.
- the transceiver unit 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transceiver antenna 230.
- the transceiver 220 may apply reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
- reception processing such as analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing, and PDCP layer processing to the acquired baseband signal to acquire user data, etc.
- the transceiver 220 may perform measurements on the received signal. For example, the measurement unit 223 may perform RRM measurements, CSI measurements, etc. based on the received signal.
- the measurement unit 223 may measure received power (e.g., RSRP), received quality (e.g., RSRQ, SINR, SNR), signal strength (e.g., RSSI), propagation path information (e.g., CSI), etc.
- the measurement results may be output to the control unit 210.
- the measurement unit 223 may derive channel measurements for CSI calculation based on channel measurement resources.
- the channel measurement resources may be, for example, non-zero power (NZP) CSI-RS resources.
- the measurement unit 223 may derive interference measurements for CSI calculation based on interference measurement resources.
- the interference measurement resources may be at least one of NZP CSI-RS resources for interference measurement, CSI-Interference Measurement (IM) resources, etc.
- CSI-IM may be called CSI-Interference Management (IM) or may be interchangeably read as Zero Power (ZP) CSI-RS.
- CSI-RS, NZP CSI-RS, ZP CSI-RS, CSI-IM, CSI-SSB, etc. may be read as interchangeable.
- the transmitting unit and receiving unit of the user terminal 20 in this disclosure may be configured by at least one of the transmitting/receiving unit 220 and the transmitting/receiving antenna 230.
- the transceiver 220 may also transmit a physical uplink shared channel (PUSCH) using simultaneous uplink (UL) transmission from multiple panels.
- PUSCH physical uplink shared channel
- UL simultaneous uplink
- the transceiver 220 may transmit a Medium Access Control Element (MAC CE) including the power headroom (PHR) for each serving cell or panel if simultaneous uplink (UL) transmission from multiple panels is supported.
- MAC CE Medium Access Control Element
- PHR power headroom
- the control unit 210 may control the triggering of the power headroom (PHR) based on the PUSCH transmission based on a specific condition.
- the specific condition relates to the prohibition timer of the PHR or the maximum permissible exposure (MPE).
- the specific condition relates to a change in the path loss or power management maximum power reduction (PMPR) of the corresponding reference signal.
- the control unit 210 may control the triggering of the PHR for each serving cell or for each panel.
- the control unit 210 may control the transmission of the MAC CE based on specific conditions.
- the MAC CE may include at least one of a field related to maximum power and a field indicating an actual PHR or a virtual PHR.
- the specific conditions may be based on the presence or absence of UL resources associated with the corresponding panel.
- the control unit 210 may determine the panel to transmit the MAC CE based on the presence or absence of UL resources associated with the corresponding panel.
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.).
- the functional blocks may be realized by combining the one device or the multiple devices with software.
- the functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, election, establishment, comparison, assumption, expectation, deeming, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function may be called a transmitting unit, a transmitter, and the like. In either case, as mentioned above, there are no particular limitations on the method of realization.
- a base station, a user terminal, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 10 is a diagram showing an example of the hardware configuration of a base station and a user terminal according to one embodiment.
- the above-mentioned base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
- the terms apparatus, circuit, device, section, unit, etc. may be interpreted as interchangeable.
- 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 figures, or may be configured to exclude some of the devices.
- processor 1001 may be implemented by one or more chips.
- the functions of the base station 10 and the user terminal 20 are realized, for example, by loading specific software (programs) onto hardware such as the processor 1001 and memory 1002, causing the processor 1001 to perform calculations, control communications via the communication device 1004, and control at least one of the reading and writing of data in the memory 1002 and storage 1003.
- the processor 1001 for example, runs an operating system to control the entire computer.
- the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
- CPU central processing unit
- control unit 110 210
- transmission/reception unit 120 220
- etc. may be realized by the processor 1001.
- the processor 1001 also reads out programs (program codes), software modules, 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.
- the programs used are those that cause a computer to execute at least some of the operations described in the above embodiments.
- the control unit 110 (210) may be realized by a control program stored in the memory 1002 and running on the processor 1001, and similar implementations may be made for other functional blocks.
- Memory 1002 is a computer-readable recording medium and may be composed of at least one of, for example, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), and other suitable storage media. Memory 1002 may also be called a register, cache, main memory, etc. Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
- ROM Read Only Memory
- EPROM Erasable Programmable ROM
- EEPROM Electrically EPROM
- RAM Random Access Memory
- Memory 1002 may also be called a register, cache, main memory, etc.
- Memory 1002 can store executable programs (program codes), software modules, etc. for implementing a wireless communication method according to one embodiment of the present disclosure.
- Storage 1003 is a computer-readable recording medium and may be composed of at least one of a flexible disk, a floppy disk, a magneto-optical disk (e.g., a compact disk (Compact Disc ROM (CD-ROM)), a digital versatile disk, a Blu-ray disk), a removable disk, a hard disk drive, a smart card, a flash memory device (e.g., a card, a stick, a key drive), a magnetic stripe, a database, a server, or other suitable storage medium.
- Storage 1003 may also be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, or a communication module.
- the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the above-mentioned transmitting/receiving unit 120 (220), transmitting/receiving antenna 130 (230), etc. may be realized by the communication device 1004.
- the transmitting/receiving unit 120 (220) may be implemented as a transmitting unit 120a (220a) and a receiving unit 120b (220b) that are physically or logically separated.
- the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (e.g., 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 be integrated into one structure (e.g., a touch panel).
- each device such as the processor 1001 and memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
- the base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized using the hardware.
- the processor 1001 may be implemented using at least one of these pieces of hardware.
- a channel, a symbol, and a signal may be read as mutually interchangeable.
- a signal may also be a message.
- a reference signal may be abbreviated as RS, and may be called a pilot, a pilot signal, or the like depending on the applied standard.
- a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
- a radio frame may be composed of one or more periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting a radio frame may be called a subframe.
- a subframe may be composed of one or more slots in the time domain.
- a subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- the numerology may be a communication parameter that is applied to at least one of the transmission and reception of a signal or channel.
- the numerology may indicate, for example, at least one of the following: SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame configuration, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- SCS SubCarrier Spacing
- TTI Transmission Time Interval
- radio frame configuration a specific filtering process performed by the transceiver in the frequency domain
- a specific windowing process performed by the transceiver in the time domain etc.
- a slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may also be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (PUSCH) mapping type B.
- a radio frame, a subframe, a slot, a minislot, and a symbol all represent time units when transmitting a signal.
- a different name may be used for a radio frame, a subframe, a slot, a minislot, and a symbol, respectively.
- the time units such as a frame, a subframe, a slot, a minislot, and a symbol in this disclosure may be read as interchangeable.
- one subframe may be called a TTI
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI.
- at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
- the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
- TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
- a base station schedules each user terminal by allocating radio resources (such as frequency bandwidth and transmission power that can be used by each user terminal) in TTI units.
- radio resources such as frequency bandwidth and transmission power that can be used by each user terminal
- the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
- the time interval e.g., the number of symbols
- the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum time unit of scheduling.
- the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- a TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
- a short TTI e.g., a shortened TTI, etc.
- TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of numerology, and may be, for example, 12.
- the number of subcarriers included in an RB may be determined based on numerology.
- an RB may include one or more symbols in the time domain and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- one or more RBs may be referred to as 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, an RB pair, etc.
- PRB Physical RB
- SCG sub-carrier Group
- REG resource element group
- PRB pair an RB pair, etc.
- a resource block may be composed of one or more resource elements (REs).
- REs resource elements
- one RE may be a radio resource area of one subcarrier and one symbol.
- a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within the BWP.
- the BWP may include a UL BWP (BWP for UL) and a DL BWP (BWP for DL).
- BWP UL BWP
- BWP for DL DL BWP
- One or more BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
- the information, parameters, etc. described in this disclosure may be represented using absolute values, may be represented using relative values from a predetermined value, or may be represented using other corresponding information.
- a radio resource may be indicated by a predetermined index.
- the names used for parameters and the like in this disclosure are not limiting in any respect. Furthermore, the formulas and the like using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not limiting in any respect.
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
- Information, signals, etc. may be output from a higher layer to a lower layer and/or from a lower layer to a higher layer. Information, signals, etc. may be input/output via multiple network nodes.
- Input/output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input/output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.
- a specific location e.g., memory
- Input/output information, signals, etc. may be overwritten, updated, or added to.
- Output information, signals, etc. may be deleted.
- Input information, signals, etc. may be transmitted to another device.
- the notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
- the notification of information in this disclosure may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination of these.
- 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 called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc.
- the RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- the MAC signaling may be notified, for example, using a MAC Control Element (CE).
- CE MAC Control Element
- notification of specified information is not limited to explicit notification, but may be implicit (e.g., by not notifying the specified information or by notifying other information).
- the determination may be based on a value represented by a single bit (0 or 1), a Boolean value represented by true or false, or a comparison of numerical values (e.g., with a predetermined value).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
- a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave, etc.
- Network may refer to the devices included in the network (e.g., base stations).
- the antenna port may be interchangeably read as an antenna port for any signal/channel (e.g., a demodulation reference signal (DMRS) port).
- the resource may be interchangeably read as a resource for any signal/channel (e.g., a reference signal resource, an SRS resource, etc.).
- the resource may include time/frequency/code/space/power resources.
- the spatial domain transmission filter may include at least one of a spatial domain transmission filter and a spatial domain reception filter.
- the above groups may include, for example, at least one of a spatial relationship group, a Code Division Multiplexing (CDM) group, a Reference Signal (RS) group, a Control Resource Set (CORESET) group, a PUCCH group, an antenna port group (e.g., a DMRS port group), a layer group, a resource group, a beam group, an antenna group, a panel group, etc.
- CDM Code Division Multiplexing
- RS Reference Signal
- CORESET Control Resource Set
- beam SRS Resource Indicator (SRI), CORESET, CORESET pool, PDSCH, PUSCH, codeword (CW), transport block (TB), RS, etc. may be read as interchangeable.
- SRI SRS Resource Indicator
- CORESET CORESET pool
- PDSCH PUSCH
- codeword CW
- TB transport block
- RS etc.
- TCI state downlink TCI state
- DL TCI state downlink TCI state
- UL TCI state uplink TCI state
- unified TCI state common TCI state
- joint TCI state etc.
- QCL QCL
- QCL assumptions QCL relationship
- QCL type information QCL property/properties
- specific QCL type e.g., Type A, Type D
- specific QCL type e.g., Type A, Type D
- index identifier
- indicator indication, resource ID, etc.
- sequence list, set, group, cluster, subset, etc.
- TCI state ID may be interchangeable.
- TCI state ID may be interchangeable as “set of spatial relationship information (TCI state)", “one or more pieces of spatial relationship information”, etc.
- TCI state and TCI may be interchangeable.
- Spatial relationship information and spatial relationship may be interchangeable.
- Base Station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, etc.
- a base station can accommodate one or more (e.g., three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small base station for indoor use (Remote Radio Head (RRH))).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
- a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control/operate based on the information.
- MS Mobile Station
- UE User Equipment
- a mobile station may also be referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc.
- at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
- the moving body in question refers to an object that can move, and the moving speed is arbitrary, and of course includes the case where the moving body is stationary.
- the moving body in question includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, artificial satellites, drones, multicopters, quadcopters, balloons, and objects mounted on these.
- the moving body in question may also be a moving body that moves autonomously based on an operating command.
- the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned).
- a vehicle e.g., a car, an airplane, etc.
- an unmanned moving object e.g., a drone, an autonomous vehicle, etc.
- a robot manned or unmanned
- at least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations.
- 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
- FIG. 11 is a diagram showing an example of a vehicle according to an embodiment.
- the vehicle 40 includes a drive unit 41, a steering unit 42, an accelerator pedal 43, a brake pedal 44, a shift lever 45, left and right front wheels 46, left and right rear wheels 47, an axle 48, an electronic control unit 49, various sensors (including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58), an information service unit 59, and a communication module 60.
- various sensors including a current sensor 50, an RPM sensor 51, an air pressure sensor 52, a vehicle speed sensor 53, an acceleration sensor 54, an accelerator pedal sensor 55, a brake pedal sensor 56, a shift lever sensor 57, and an object detection sensor 58
- an information service unit 59 including a communication module 60.
- the drive unit 41 is composed of at least one of an engine, a motor, and a hybrid of an engine and a motor, for example.
- the steering unit 42 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels 46 and the rear wheels 47 based on the operation of the steering wheel operated by the user.
- the electronic control unit 49 is composed of a microprocessor 61, memory (ROM, RAM) 62, and a communication port (e.g., an Input/Output (IO) port) 63. Signals are input to the electronic control unit 49 from various sensors 50-58 provided in the vehicle.
- the electronic control unit 49 may also be called an Electronic Control Unit (ECU).
- ECU Electronic Control Unit
- Signals from the various sensors 50-58 include a current signal from a current sensor 50 that senses the motor current, a rotation speed signal of the front wheels 46/rear wheels 47 acquired by a rotation speed sensor 51, an air pressure signal of the front wheels 46/rear wheels 47 acquired by an air pressure sensor 52, a vehicle speed signal acquired by a vehicle speed sensor 53, an acceleration signal acquired by an acceleration sensor 54, a depression amount signal of the accelerator pedal 43 acquired by an accelerator pedal sensor 55, a depression amount signal of the brake pedal 44 acquired by a brake pedal sensor 56, an operation signal of the shift lever 45 acquired by a shift lever sensor 57, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by an object detection sensor 58.
- the information service unit 59 is composed of various devices, such as a car navigation system, audio system, speakers, displays, televisions, and radios, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices.
- the information service unit 59 uses information acquired from external devices via the communication module 60, etc., to provide various information/services (e.g., multimedia information/multimedia services) to the occupants of the vehicle 40.
- various information/services e.g., multimedia information/multimedia services
- the information service unit 59 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
- input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
- output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
- the driving assistance system unit 64 is composed of various devices such as millimeter wave radar, Light Detection and Ranging (LiDAR), cameras, positioning locators (e.g., Global Navigation Satellite System (GNSS)), map information (e.g., High Definition (HD) maps, Autonomous Vehicle (AV) maps), gyro systems (e.g., Inertial Measurement Unit (IMU), Inertial Navigation System (INS)), artificial intelligence (AI) chips, and AI processors, which provide functions for preventing accidents and reducing the driver's driving burden, and one or more ECUs that control these devices.
- the driving assistance system unit 64 also transmits and receives various information via the communication module 60 to realize driving assistance functions or autonomous driving functions.
- the communication module 60 can communicate with the microprocessor 61 and components of the vehicle 40 via the communication port 63.
- the communication module 60 transmits and receives data (information) via the communication port 63 between the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, the microprocessor 61 and memory (ROM, RAM) 62 in the electronic control unit 49, and the various sensors 50-58 that are provided on the vehicle 40.
- the communication module 60 is a communication device that can be controlled by the microprocessor 61 of the electronic control unit 49 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
- the communication module 60 may be located either inside or outside the electronic control unit 49.
- the external device may be, for example, the above-mentioned base station 10 or user terminal 20.
- the communication module 60 may also be, for example, at least one of the above-mentioned base station 10 and user terminal 20 (it may function as at least one of the base station 10 and user terminal 20).
- the communication module 60 may transmit at least one of the signals from the various sensors 50-58 described above input to the electronic control unit 49, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 59 to an external device via wireless communication.
- the electronic control unit 49, the various sensors 50-58, the information service unit 59, etc. may be referred to as input units that accept input.
- the PUSCH transmitted by the communication module 60 may include information based on the above input.
- the communication module 60 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device and displays it on an information service unit 59 provided in the vehicle.
- the information service unit 59 may also be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 60).
- the communication module 60 also stores various information received from external devices in memory 62 that can be used by the microprocessor 61. Based on the information stored in memory 62, the microprocessor 61 may control the drive unit 41, steering unit 42, accelerator pedal 43, brake pedal 44, shift lever 45, left and right front wheels 46, left and right rear wheels 47, axles 48, various sensors 50-58, and the like provided on the vehicle 40.
- the base station in the present disclosure may be read as a user terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple user terminals (which may be called, for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
- the user terminal 20 may be configured to have the functions of the base station 10 described above.
- terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "sidelink").
- the uplink channel, downlink channel, etc. may be read as the sidelink channel.
- the user terminal in this disclosure may be interpreted as a base station.
- the base station 10 may be configured to have the functions of the user terminal 20 described above.
- operations that are described as being performed by a base station may in some cases be performed by its upper node.
- a network that includes one or more network nodes having base stations, it is clear that various operations performed for communication with terminals may be performed by the base station, one or more network nodes other than the base station (such as, but not limited to, a Mobility Management Entity (MME) or a Serving-Gateway (S-GW)), or a combination of these.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation.
- the processing procedures, sequences, flow charts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no inconsistency.
- the methods described in this disclosure present elements of various steps using an exemplary order, and are not limited to the particular order presented.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced
- 4th generation mobile communication system 4th generation mobile communication system
- 5G 5th generation mobile communication system
- 6G 6th generation mobile communication system
- xG x is, for example, an integer or decimal
- Future Radio Access FX
- GSM Global System for Mobile communications
- CDMA2000 Code Division Multiple Access
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi
- IEEE 802.16 WiMAX (registered trademark)
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth (registered trademark), and other appropriate wireless communication methods, as well as next-generation systems that are expanded, modified,
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to elements using designations such as “first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
- determining may encompass a wide variety of actions. For example, “determining” may be considered to be judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., looking in a table, database, or other data structure), ascertaining, etc.
- Determining may also be considered to mean “determining” receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), etc.
- judgment (decision) may be considered to mean “judging (deciding)” resolving, selecting, choosing, establishing, comparing, etc.
- judgment (decision) may be considered to mean “judging (deciding)” some kind of action.
- judgment (decision) may be interpreted interchangeably with the actions described above.
- expect may be read as “be expected”.
- "expect(s)" ("" may be expressed, for example, as a that clause, a to infinitive, etc.) may be read as “be expected".
- "does not expect" may be read as "be not expected".
- "An apparatus A is not expected" may be read as "An apparatus B other than apparatus A does not expect" (for example, if apparatus A is a UE, apparatus B may be a base station).
- the "maximum transmit power" referred to in this disclosure may mean the maximum value of transmit power, may mean the nominal UE maximum transmit power, or may mean the rated UE maximum transmit power.
- connection and “coupled,” or any variation thereof, refer to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, "connected” may be read as "accessed.”
- a and B are different may mean “A and B are different from each other.”
- the term may also mean “A and B are each different from C.”
- Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
- timing, time, duration, time instance, any time unit e.g., slot, subslot, symbol, subframe
- occasion, resource etc.
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Abstract
Description
Rel.15及びRel.16のUEにおいては、1つのみのビーム及びパネルが、1つの時点においてUL送信に用いられる(図1A)。Rel.17においては、ULのスループット及び信頼性(reliability)の改善のために、1以上の送受信ポイント(Transmission/Reception Point(TRP))に対して、マルチビーム(複数ビーム)及びマルチパネル(複数パネル)の同時UL送信が検討されている。
2つのPUCCHリソースが、時間ドメインにおいて重複(オーバーラップ)し、同時に送信される。2つのPUCCHリソースのそれぞれは、1つの異なるパネル/ビームに関連付けられる(図2A参照)。2つのビームのそれぞれは、それぞれのTRPに向けて送信される。
1つのPUCCHリソースが、2つのパネル/空間関係を用いて同時に送信される。1つのPUCCHリソースは、2つのパネル/ビームに関連付けられる(図2B参照)。2つのビームのそれぞれは、それぞれのTRPに向けて送信される。
・単一のDCI(S-DCI)ベースの空間分割多重(Space Division Multiplexing:SDM)方式:
この方式では、1つのPUSCHの異なるレイヤ/DMRSポートが別々にプリコーディングされ、異なるUEビーム/パネルから同時に送信される。なお、当該方式では、2つのCW(コードワード)をサポートするかどうか、2つの異なるUEビーム/パネルから同時に送信するかどうかが検討課題として挙げられる。
・S-DCIベースのSFN方式:
この方式では、1つのPUSCHの同じレイヤ/DMRSポートが、全て異なる2つのUEビーム/パネルから同時に送信される。
・M-DCIのPUSCH同時送信方式:
この方式では、異なるTRPに関連する2つの独立したPUSCHが、同じアクティブBWP内で同時に送信される。例えば、2つのPUSCHの合計レイヤ数は最大4レイヤであってよい。なお、これら2つのPUSCHのそれぞれのレイヤ数は、仕様によって規定されてよく、例えば1-3レイヤ、又は最大2レイヤであってよい。
Rel.16 NRでは、ULのビーム指示方法として、UL TCI状態を用いることが検討されている。UL TCI状態の通知は、UEのDLビーム(DL TCI状態)の通知に類似する。なお、DL TCI状態は、PDCCH/PDSCHのためのTCI状態と互いに読み換えられてもよい。
<PUSCH用送信電力制御>
NR(例えば、Rel.16)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についての測定用参照信号(Sounding Reference Signal(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(3)で表されてもよい。
NRにおいては、最大許容曝露(Maximum Permitted Exposure(MPE))(又は電磁的電力密度曝露(electromagnetic power density exposure))の問題についての対応が検討されている。UEは、健康と安全のために人体への最大放射に関するFederal Communication Commission(FCC)の規制を満たすことが要求される。
NRでは、1つ又は複数の送受信ポイント(Transmission/Reception Point(TRP))(マルチTRP(Multi-TRP(M-TRP)))が、1つ又は複数のパネル(マルチパネル)を用いて、UEに対してDL送信を行うことが検討されている。また、UEが、1つ又は複数のTRPに対してUL送信を行うことが検討されている。
・オプション1:複数の(例えば、2つの)SRI/TPMIを指示するフィールドを用いて、複数の(例えば、2つの)TRPに対するSRI/TPMI(値)が指示される、
・オプション2:1つのSRI/TPMIを指示するフィールドが指示され、当該SRI/TPMIを指示するフィールドに、複数の(例えば、2つの)SRI/TPMIの値に対応するコードポイントが設定される。
将来の無線通信システム(例えば、NR)では、UEがネットワークに対して、サービングセル毎の電力余裕(パワーヘッドルーム(Power Headroom(PH)))の情報を含むPHレポート(Power Headroom Report(PHR))を送信する。ネットワークは、UEの上り送信電力の制御のために、PHRを利用できる。
PHRは、PUSCH(Physical Uplink Shared Channel)を用いてMAC(Medium Access Control)シグナリングにより送信されてもよい。例えば、PHRは、MAC PDU(Protocol Data Unit)に含まれるPHR MAC CE(Control Element)を用いて通知される。
サービングセルcのキャリアfのパネルpにおける最大送信電力(最大送信電力)PCMAXpanel,f,c,pの設定例を説明する。PCMAXpanel,f,c,pは、PCMAX,f,c,p)と表記されてもよい。
UEは、サービングセル毎かつキャリア毎の最大送信電力に関する設定(例えばRel.17と同様の設定)を受信し、当該設定に基づいて、パネル毎の最大送信電力を決定してもよい。例えば、UEは、サービングセルcのキャリアfの最大送信電力がPCMAX,f,cとして設定され、各パネルpの最大送信電力PCMAX,f,c,pを、当該PCMAX,f,cに基づいて決定してもよく、又は、PCMAX,f,cとPCMAX,f,c,pとの関係に基づいて決定してもよい。当該PCMAX,f,c、及び当該関係は、上位レイヤシグナリング/物理レイヤシグナリングによりUEに設定されてもよい。この場合のパネル毎の最大送信電力について、以下の例が挙げられる。
UEは、下記式(8)に基づいて、パネルpの最大送信電力PCMAX,f,c,pを決定してもよい。Nは同時送信を指示されたパネルの数である。つまり、各パネルの最大送信電力は同じであってもよい。
UEは、下記式(9)に基づいて、パネルpの最大送信電力PCMAX,f,c,pを決定してもよい。つまり、各パネルpの最大送信電力の最大送信電力の合計が、UEの最大送信電力であってもよい。Npは、パネルpに対する値であり、パネル毎に異なっていてもよい。つまり、各パネルの最大送信電力は異なっていてもよい。
UEは、下記式(10)に基づいて、パネルpの最大送信電力PCMAX,f,c,pを決定してもよい。つまり、各パネルpの最大送信電力の最大送信電力の合計が、UEの最大送信電力であってもよい。この場合、各パネルの最大送信電力は同じでもよく、それぞれ異なっていてもよく、一部のパネルの最大送信電力が同じでもよい。
Rel.17のM-TRP PUSCHの繰り返しにおいて、スロットnでPHR MAC CEが報告された場合、第1のTRP用の第1のPHRは、Rel.16と同様に報告される。第2のTRP用の第2のPHRは、次の(1)~(3)のように定義されてもよい。
(1)第1のPHRが実際のPHRであり、第2のTRPに関連するPUSCHの繰り返しがスロットnにある場合、第2のPHRは実際のPHRである。
(2)第1のPHRが実際のPHRで、第2のTRPに関連するPUSCH繰り返しスロットnでない場合、第2のPHRは仮想PHRである。
(3)第1のPHRが仮想PHRである場合、第2のPHRは仮想PHRである。
(2)そうでなければ((1)の条件を満たさない場合)、UEは、他のSRSリソースセットに関連付けられた参照PUSCH送信のための第2のタイプ1パワーヘッドルームレポートを提供する。
本開示において、「パネル」は、Rel.17と同様にUE能力(UE capability)の値(値のセット)を示してもよい。また、「パネル」は、「UE アンテナグループ」など、他の用語と同等の定義を示してもよい。
・単一のDCI(S-DCI) 空間分割多重(Space Division Multiplexing:SDM)方式:1つのPUSCHの異なるレイヤ/DMRSポートが別々にプリコーディングされ、異なるUEビーム/パネルから同時に送信される。
・S-DCI 周波数分割多重(FDM)-A方式:1つのPUSCHの送信機会の周波数領域リソースの異なる部分が、異なるUEビーム/パネルから送信される。
・S-DCI FDM-B方式:同一TBの同一/異なるRVの2つのPUSCH送信機会を、重複しない周波数領域リソース及び同一時間領域リソース上で、異なるUEビーム/パネルから送信する方式。
・S-DCI SFNベースの送信方式:2つの異なるUEビーム/パネルから同時に同じPUSCH/DMRSを送信する。
・S-DCI 空間領域繰り返し方式:同じTBの異なる冗長バージョン(Redundancy Version(RV))を持つ2つのPUSCH送信機会が、同じ時間および周波数リソース上で2つの異なるUEビーム/パネルから送信される。
・M-DCI方式:オーバーラップした(時間領域では完全/部分的にオーバーラップ、周波数領域では完全/部分的オーバーラップ又は非オーバーラップ)2つのPUSCHを、2つの異なるUEビーム/パネルから送信する方式。
マルチパネル同時UL送信の場合、最大UL送信電力の制限を考慮すると、以下の想定1-1~1-3の少なくとも1つが想定される。
パネル毎の最大UL送信電力を考慮する。サービングセルcにおけるパネルpのPUSCH/PUCCH/SRSの実際の送信電力は、サービングセルcにおけるパネルpの最大UL送信電力以下であることが想定される。すなわち、Ppanel_actual,c,p≦Ppanel_max,c,pが成り立つ。サービングセルcにおけるパネルpの最大UL送信電力は、上記(最大送信電力)の式(8)~(10)のいずれかにより計算されてもよい。なお、キャリアを特定しない場合キャリアfの要素が除去されてもよい。
セルごとの最大UL送信電力を考慮する。サービングセルcの複数のパネルからのPUSCH/PUCCH/SRSの実際の送信電力の合計は、サービングセルcの最大UL送信電力以下となることが想定される。すなわち、ΣpPpanel_actual,c,p≦Pcell_max,cが成り立つ。
なお、サービングセルcの最大UL送信電力は、Rel.17において決定された値(すなわち、PCMAX,f,c)でもよい。
Ppanel_actual,c,pはサービングセルcのパネルpの実際の送信電力、Pcell_max,cはサービングセルcの最大のUL送信電力である。
パネル毎の最大UL送信電力とセル毎の最大送信電力の両方が考慮されてもよい。送信電力は、想定1と想定2の両方の条件を満たしてもよい。
シングルパネル送信とマルチパネル同時送信の動的切り替えがサポートされる場合、最大UL送送信電力の制限を考慮すると、以下の想定2-1、2-2の少なくとも1つが想定される。
パネル毎の最大UL送信電力を考慮する。サービングセルcにおけるパネルpにおけるシングルパネル送信のPUSCH/PUCCH/SRSの実際の送信電力は、サービングセルcにおけるパネルpの最大UL送信電力以下であることが想定される。すなわち、Ppanel_actual,c,p≦Ppanel_max,c,pが成り立つ。
セル毎の最大UL送信電力を考慮する。サービングセルcのシングルパネルからのPUSCH/PUCCH/SRSの実際の送信電力の合計は、サービングセルcの最大UL送信電力以下となることが想定される。すなわち、Ppanel_actual,c,p≦Pcell_max,cが成り立つ。なお、サービングセルcの最大UL送信電力は、Rel.17において決定された値(すなわち、PCMAX,f,c)でもよい。
既存の仕様(例えばRel.17)では、PHRは、以下のイベント/条件の少なくとも1つに基づいてトリガされてよい:
・PHRの禁止タイマ(phr-ProhibitTimer)が満了したとき(expire)/当該タイマが満了しており(has expired)、且つ、MACエンティティが新規送信のためのULリソースを有し、当該MACエンティティにおけるPHRの最後の送信以降、アクティブDL BWPが休止(dormant)BWPではない任意のMACエンティティに対応する1つのアクティベーテッドサービングセル(activated Serving Cell)のためのパスロス参照として使用される少なくとも1つの参照信号について、パスロスが所定閾値(phr-Tx-PowerFactorChange(dB))よりも変化しているとき。
・PHRの周期的タイマ(phr-PeriodicTimer)が満了したとき。
・上位レイヤシグナリングによってPHRの機能が設定/再設定されたとき(なお、当該上位レイヤシグナリングは、PHRの機能を無効化するために使用されなくてよい)。
・firstActiveDownlinkBWP-Idが休止BWPにセットされていないULが設定された(configured)MACエンティティに対応するSCellがアクティベートされたとき。
・SCGがアクティベートされたとき。
・SCGがディアクティベートされた場合を除き、PSCellが追加されたとき(すなわち、PSCellが新たに追加/変更されたとき)。
・PHRの禁止タイマ(phr-ProhibitTimer)が満了したとき(expire)/当該タイマが満了しており(has expired)、且つ、MACエンティティが新規送信のためのULリソースを有し、ULが設定された任意のMACエンティティに対応するアクティベーテッドサービングセル(activated Serving Cell)について以下を満たすとき。
・このセル(上記アクティベーテッドサービングセル(activated Serving Cell))において、送信のために割り当てられたULリソースがある/PUCCH送信があるとき、且つ、PHRの最後の送信以降において、このセルに対する電力管理のための要求電力バックオフが所定閾値(phr-Tx-PowerFactorChange(dB))よりも変化している場合。
・ULが設定された任意のMACエンティティに対応するSCellのアクティベートされた休止BWPから非休止(non-dormant)BWPへ切り替えられたとき。
・上位レイヤパラメータmpe-Reporting-FR2が設定され、MPEの禁止タイマ(mpe-ProhibitTimer)が実行されていない場合。
・あるMACエンティティにおけるPHRの最後の送信以降、FR2のMPE要件を満たすために適用されるPMPRの測定値が、少なくとも1つのアクティブなFR2のサービングセルについて所定閾値(mpe-Threshold)以上である場合。
・あるMACエンティティにおけるPHRの最後の送信以降、FR2のMPE要件を満たすために適用されるPMPRの測定値が、少なくとも1つのアクティブなFR2のサービングセルについて所定閾値(phr-Tx-PowerFactorChange(dB))よりも変化している場合。なお、本ケースにおいて、当該PHRは、「MPE P-MPR報告」と呼ばれてもよい。
<分析1>
上述したように、同時マルチパネル送信(Simultaneous multi-panel Tx(STxMP))がPUSCHに適用されることが検討されている。例えば、サービングセルに対して、STxMPが設定されている場合、PHRのトリガとなるイベント/条件が明確でない。
また、同時マルチパネル送信が適用されるケースとして、シングルDCI(S-DCI)/マルチDCI(M-DCI)のケースが想定される。特にマルチDCIのケースでは、非理想バックホール((non-ideal backhaul))を考慮すると、2つのTRPのPHRの報告は、別々のMAC CEに存在し得る。その場合、UEは、2つのTRPに対してPHRを別々に送信することができるか明確でない。
本開示において、「A/B」及び「A及びBの少なくとも一方」は、互いに読み替えられてもよい。また、本開示において、「A/B/C」は、「A、B及びCの少なくとも1つ」を意味してもよい。
<第1の実施形態>
第1の実施形態は、分析1に対応し、PUSCHの同時マルチパネル送信において、PHRをトリガするためのイベント/条件に関する。
オプション1では、サービングセルごとにPHRがトリガされる条件について説明する。PHRは、サービングセルにおいて、特定のイベントが発生した場合にトリガされる。PUSCHの同時マルチパネル送信が設定されたサービングセルにおけるPHRのトリガ条件/イベントは、以下の少なくとも1つであってよい。
オプション1.1は、PHRの禁止タイマ(phr-prohibitTimer)に関する。
Alt.2:phr-prohibitTimerは、パネル/TRPごとに設定されてよい。
Alt.2-1:サービングセルに設定されたパネル/TRPごとのPhr-ProhibitTimerの全て(例えば2つ)が満了した(expired)/満了している(has expired)場合、PHRがトリガされてよい。
Alt.2-2:サービングセルに設定された2つのパネル/TRPのうち、いずれか1つのパネル/TRPのphr-ProhibitTimerが満了した(expired)/満了している(has expired)場合、PHRがトリガされてよい。
Alt.2-3:サービングセルに設定された2つのパネル/TRPのうち、特定の1つのパネル/TRP(例えば、最初のパネル/TRP)のphr-ProhibitTimerが満了した(expired)/満了している(has expired)場合、PHRがトリガされてよい。
オプション1.2は、パスロス(の変化)に関する。
Alt.2:サービングセルに対応する2つのパネル/TRP/参照信号のうち、いずれか1つのパネル/TRP/参照信号において、パスロスが所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
Alt.3:サービングセルに対応する2つのパネル/TRP/参照信号のうち、特定の1つのパネル/TRP/参照信号(例えば、最初のパネル/TRP/参照信号)において、パスロスが所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
バリエーション:所定閾値(phr-Tx-PowerFactorChange)は、パネル/TRP/参照信号ごとに設定されてもよい。
オプション1.3は、PHRの周期的タイマ(phr-PeriodicTimer)に関する。
Alt.2:phr-PeriodicTimerは、パネル/TRPごとに設定されてよい。
Alt.2-1:サービングセルに設定されたパネル/TRPごとのphr-PeriodicTimerの全て(例えば2つ)が満了した(expired)/満了している(has expired)場合、PHRがトリガされてよい。
Alt.2-2:サービングセルに設定された2つのパネル/TRPのうち、いずれか1つのパネル/TRPのphr-PeriodicTimerが満了した(expired)/満了している(has expired)場合、PHRがトリガされてよい。
Alt.2-3:サービングセルに設定された2つのパネル/TRPのうち、特定の1つのパネル/TRP(例えば、最初のパネル/TRP)のphr-PeriodicTimerが満了した(expired)/満了している(has expired)場合、PHRがトリガされてよい。
オプション1.4は、電力管理最大電力低減(Power-management Maximum Power Reduction:PMPR(の変化)に関する。
Alt.2:PMPRは、パネル/TRPごとに設定されてよい。
Alt.2-1:サービングセルに対応する2つのパネル/TRPの両方において、サービングセルのパワーマネジメントによる要求パワーバックオフが所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
Alt.2-2:サービングセルに対応する2つのパネル/TRPのうち、いずれか1つのパネル/TRPにおいて、サービングセルのパワーマネジメントによる要求パワーバックオフが所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
Alt.2-3:サービングセルに対応する2つのパネル/TRPのうち、特定の1つのパネル/TRP(例えば、第1のパネル/TRP)において、サービングセルのパワーマネジメントによる要求パワーバックオフが所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
バリエーション:所定閾値(phr-Tx-PowerFactorChange)は、パネル/TRPごとに設定されてもよい。
オプション1.5は、MPEの禁止タイマ(mpe-ProhibitTimer)に関する。mpe-Reporting-FR2が設定されている場合、以下の条件の少なくとも1つが適用されてよい。
Alt.2:mpe-ProhibitTimerは、パネル/TRPごとに設定されてよい。
Alt.2-1:サービングセルに設定されたパネル/TRPごとのmpe-ProhibitTimerの全て(例えば2つ)が動作していない場合(not running)、PHRがトリガされてよい。
Alt.2-2:サービングセルに設定された2つのパネル/TRPのうち、いずれか1つのパネル/TRPのmpe-ProhibitTimerが動作していない場合(not running)、PHRがトリガされてよい。
Alt.2-3:サービングセルに設定された2つのパネル/TRPのうち、特定の1つのパネル/TRP(例えば、最初のパネル/TRP)のmpe-ProhibitTimerが動作していない場合(not running)、PHRがトリガされてよい。
オプション1.6は、FR2 MPEのためのPMPRに関する。mpe-Reporting-FR2が設定されている場合、以下の条件の少なくとも1つが適用されてよい。
Alt.2:PMPRは、パネル/TRPごとに設定されてよい。
Alt.2-1:サービングセルに対応する2つのパネル/TRPの両方において、前記PMPRの測定値が所定閾値(mpe-Threshold)以上である場合、PHRがトリガされてよい。
Alt.2-2:サービングセルに対応する2つのパネル/TRPのうち、いずれか1つのパネル/TRPにおいて、前記PMPRの測定値が所定閾値(mpe-Threshold)以上である場合、PHRがトリガされてよい。
Alt.2-3:サービングセルに対応する2つのパネル/TRPのうち、特定の1つのパネル/TRP(例えば、第1のパネル/TRP)において、前記PMPRの測定値が所定閾値(mpe-Threshold)以上である場合、PHRがトリガされてよい。
バリエーション:所定閾値(mpe-Threshold)は、パネル/TRPごとに設定されてもよい。
オプション1.7は、FR2 MPEのためのPMPR(の変化)に関する。mpe-Reporting-FR2が設定されている場合、以下の条件の少なくとも1つが適用されてよい。
Alt.2:PMPRは、パネル/TRPごとに設定されてよい。
Alt.2-1:サービングセルに対応する2つのパネル/TRPの両方において、前記PMPRの測定値が所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
Alt.2-2:サービングセルに対応する2つのパネル/TRPのうち、いずれか1つのパネル/TRPにおいて、前記PMPRの測定値が所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
Alt.2-3:サービングセルに対応する2つのパネル/TRPのうち、特定の1つのパネル/TRP(例えば、第1のパネル/TRP)において、前記PMPRの測定値が所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
バリエーション:所定閾値(phr-Tx-PowerFactorChange)は、パネル/TRPごとに設定されてもよい。
オプション2では、サービングセルのパネル/TRPごとにPHRがトリガされる条件について説明する。PHRは、サービングセルのある(certain)パネル/TRPにおいて、特定のイベントが発生した場合にトリガされる。PUSCHの同時マルチパネル送信が設定されたサービングセルのパネル/TRPにおけるPHRのトリガ条件/イベントは、以下の少なくとも1つであってよい。
Alt.2:パスロスがパネル/TRPに対応する所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
バリエーション:phr-Tx-PowerFactorChangeはパネル/TRPごとに設定されてよい。
Alt.3:phr-PeriodicTimerは、パネル/TRPごとに設定されてよい。パネル/TRPに設定されたphr-PeriodicTimerが満了した(expired)/満了している(has expired)場合、PHRがトリガされてよい。
Alt.4:PMPRは、パネル/TRPごとに設定されてよい。パネル/TRPのパワーマネジメントによる要求パワーバックオフが所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
バリエーション:phr-Tx-PowerFactorChangeはパネル/TRPごとに設定されてよい。
Alt.5:mpe-Reporting-FR2が設定されている場合。
mpe-ProhibitTimerは、パネル/TRPごとに設定されてよい。パネル/TRPごとに設定されるmpe-ProhibitTimerが動作していない場合(not running)、PHRがトリガされてよい。
Alt.6:mpe-Reporting-FR2が設定されている場合。
PMPRは、パネル/TRPごとに設定されてよい。仕様に規定されるFR2 MPEの要件を満たすために適用されるPMPRの測定値が所定閾値(mpe-Threshold)以上である場合、PHRがトリガされてよい。
バリエーション:mpe-Thresholdは、パネル/TRPごとに設定されてよい。
Alt.7:mpe-Reporting-FR2が設定されている場合。
前記PMPRの測定値が所定閾値(phr-Tx-PowerFactorChange)よりも変化している(has changed)場合、PHRがトリガされてよい。
バリエーション:所定閾値(phr-Tx-PowerFactorChange)は、パネル/TRPごとに設定されてもよい。
第2の実施形態は、分析2に対応し、マルチDCIベースの同時マルチパネル送信に関し、特にPHRのためのMAC CEについて説明する。
実施形態2.1では、PHRのためのMAC CE(PHR MAC CE)の具体例について説明する。図5は、PHRの送信の概要を示す図である。UEは、マルチパネルからの上りリンク(UL)同時送信がサポートされている場合、パネル毎/セル毎の送信電力に関する制限の設定を受信してよい。図5に示すように、UEは、前記設定に基づいて、実際のPUSCH送信に基づくパワーヘッドルーム(PHR)(第1のPHR/実際のPHR(actual PHR))、実際のPUSCH送信に依存しないPHR(第2のPHR/仮想PHR(virtual PHR))の少なくとも一方の送信(報告)を制御する。上記制限は、最大UL送信電力であってもよく、例えば、パネル毎の最大UL送信電力であってもよい。また、UEが、能力に基づいて最大UL送信電力を決定してもよい。また、第1のPHR及び前記第2のPHRの少なくとも1つはシングルパネル送信に基づいてもよい。
実施形態2.2では、上述したPHR MAC CEの送信条件について説明する。
あるサービングセルにおいて、1つのMAC CEが1つのパネル/TRP(TRP#X)に対応するPHRを含む場合、UEは、以上の条件の少なくとも1つに基づいて、当該MAC CEの送信を制御してもよい。つまり、当該MAC CEは、以下の条件の少なくとも1つに基づいて送信を制御されてもよい。
Alt.1:MAC CEは、対応するTRP(TRP#X)に対してのみ送信される。
Alt.2:MAC CEは、対応するTRP(TRP#X)に送信され、他のTRP(TRP#Y)にも送信される。
Alt.3:MAC CEが、どちらのTRPに送信されるか、または両方のTRPに送信されるかは、UEの実装次第であってよい。
Alt.1:MAC CEは、他のTRP(TRP#Y)に対して(のみ)送信される。
Alt.2:MAC CEは、送信されない。
Alt.3:MAC CEが送信されるかは、UEの実装次第であってよい。
あるサービングセルにおいて、1つのMAC CEが2つのパネル/TRP(TRP#X)に対応するPHRを含む場合、UEは、以上の条件の少なくとも1つに基づいて、当該MAC CEの送信を制御してもよい。つまり、当該MAC CEは、以下の条件の少なくとも1つに基づいて送信を制御されてもよい。
Alt.1:MAC CEは、1つのTRP(TRP#X、#Yのいずれか)に対してのみ送信される。MAC CEがどのTRPに送信されるかは、UEの実装次第であってよい。
Alt.2:MAC CEは、1つのTRP(TRP#X、#Yのいずれか)に対してのみ送信される。MAC CEがどのTRPに送信されるかは、所定の規則(仕様による定義)/ネットワーク設定(上位レイヤシグナリング/物理レイヤシグナリングによる設定/指示)によって選択されてよい。
Alt.3:MAC CEは、両方(2つ)のTRP(TRP#X、#Y)に送信される。
Alt.4:MAC CEが一方のTRP(TRP#X、#Yのいずれか)に送信されるか、両方のTRP(TRP#X、#Y)に送信するかは、UEの実装次第であってよい。
[UEへの情報の通知]
上述の実施形態における(ネットワーク(Network(NW))(例えば、基地局(Base Station(BS)))から)UEへの任意の情報の通知(言い換えると、UEにおけるBSからの任意の情報の受信)は、物理レイヤシグナリング(例えば、DCI)、上位レイヤシグナリング(例えば、RRCシグナリング、MAC CE)、特定の信号/チャネル(例えば、PDCCH、PDSCH、参照信号)、又はこれらの組み合わせを用いて行われてもよい。
上述の実施形態におけるUEから(NWへ)の任意の情報の通知(言い換えると、UEにおけるBSへの任意の情報の送信/報告)は、物理レイヤシグナリング(例えば、UCI)、上位レイヤシグナリング(例えば、RRCシグナリング、MAC CE)、特定の信号/チャネル(例えば、PUCCH、PUSCH、PRACH、参照信号)、又はこれらの組み合わせを用いて行われてもよい。
上述の実施形態の少なくとも1つは、特定の条件を満たす場合に適用されてもよい。当該特定の条件は、規格において規定されてもよいし、上位レイヤシグナリング/物理レイヤシグナリングを用いてUE/BSに通知されてもよい。
・上記実施形態の少なくとも1つについての特定の処理/動作/制御/情報をサポートすること。
・UEがマルチパネル同時送受信をサポートすること。
・UEがマルチパネル同時送受信に関するPHRの報告/送信をサポートすること。
・UEが同時マルチパネル送信に対してパネルごとの電力制限またはセルごとの電力制限をサポートすること。
・UEがシングルパネル送信に対してパネルごとの電力制限またはセルごとの電力制限をサポートすること(同時マルチパネル送信がサポートされている場合)。
・UEが1つのサービングセルに対して2つのパネル用の2つのPHRを報告することをサポートすること。
本開示の一実施形態(第1の実施形態)に関して、以下の発明を付記する。
[付記1]
マルチパネルからの上りリンク(UL)同時送信を用いて、物理上りリンク共有チャネル(PUSCH)を送信する送信部と、
前記PUSCH送信に基づくパワーヘッドルーム(PHR)のトリガを特定の条件に基づいて制御する制御部と、を有する端末。
[付記2]
前記特定の条件は、前記PHR又は最大許容曝露(MPE)の禁止タイマに関する、付記1に記載の端末。
[付記3]
前記特定の条件は、対応する参照信号のパスロス又は電力管理最大電力低減(PMPR)の変化に関する、付記1又は付記2に記載の端末。
[付記4]
前記制御部は、サービングセルごと又はパネルごとに前記PHRのトリガを制御する、付記1から付記3のいずれかに記載の端末。
本開示の一実施形態(第2の実施形態)に関して、以下の発明を付記する。
[付記1]
マルチパネルからの上りリンク(UL)同時送信がサポートされている場合、サービングセルごと又はパネルごとのパワーヘッドルーム(PHR)を含むMedium Access Control Control Element(MAC CE)を送信する送信部と、
前記MAC CEの送信を特定の条件に基づいて制御する制御部と、を有する端末。
[付記2]
前記MAC CEは、最大電力に関するフィールド、及び、実際のPHR又は仮想PHRであることを示すフィールドの少なくとも1つを含む、付記1に記載の端末。
[付記3]
前記特定の条件は、対応するパネルに関連付けられたULリソースの有無に基づく、付記1又は付記2に記載の端末。
[付記4]
前記制御部は、対応するパネルに関連付けられたULリソースの有無に基づいて、前記MAC CEを送信するパネルを判断する、付記1から付記3のいずれかに記載の端末。
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8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9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)
- マルチパネルからの上りリンク(UL)同時送信がサポートされている場合、サービングセルごと又はパネルごとのパワーヘッドルーム(PHR)を含むMedium Access Control Control Element(MAC CE)を送信する送信部と、
前記MAC CEの送信を特定の条件に基づいて制御する制御部と、を有する端末。 - 前記MAC CEは、最大電力に関するフィールド、及び、実際のPHR又は仮想PHRであることを示すフィールドの少なくとも1つを含む、請求項1に記載の端末。
- 前記特定の条件は、対応するパネルに関連付けられたULリソースの有無に基づく、請求項1に記載の端末。
- 前記制御部は、対応するパネルに関連付けられたULリソースの有無に基づいて、前記MAC CEを送信するパネルを判断する、請求項1に記載の端末。
- マルチパネルからの上りリンク(UL)同時送信がサポートされている場合、サービングセルごと又はパネルごとのパワーヘッドルーム(PHR)を含むMedium Access Control Control Element(MAC CE)を送信するステップと、
前記MAC CEの送信を特定の条件に基づいて制御するステップと、を有する端末の無線通信方法。 - マルチパネルからの上りリンク(UL)同時送信がサポートされている場合、サービングセルごと又はパネルごとのパワーヘッドルーム(PHR)を含むMedium Access Control Control Element(MAC CE)を受信する受信部と、
端末が特定の条件に基づいて判断した前記MAC CEの受信を制御する制御部と、を有する基地局。
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| CN202380094658.0A CN120677772A (zh) | 2023-02-22 | 2023-02-22 | 终端、无线通信方法以及基站 |
| PCT/JP2023/006481 WO2024176392A1 (ja) | 2023-02-22 | 2023-02-22 | 端末、無線通信方法及び基地局 |
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Non-Patent Citations (2)
| Title |
|---|
| SEUNGHEE HAN, INTEL CORPORATION: "UL precoding indication for multi-panel transmission (#112)", 3GPP DRAFT; R1-2300937; TYPE DISCUSSION; NR_MIMO_EVO_DL_UL-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Athens, GR; 20230227 - 20230303, 17 February 2023 (2023-02-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052248080 * |
| XUEMING PAN, VIVO: "Further discussion on UL precoding indication for multi-panel transmission", 3GPP DRAFT; R1-2300441; TYPE DISCUSSION; NR_MIMO_EVO_DL_UL-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Athens, GR; 20230227 - 20230303, 17 February 2023 (2023-02-17), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052247584 * |
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