WO2024171653A1 - 端末、基地局、通信方法及び集積回路 - Google Patents
端末、基地局、通信方法及び集積回路 Download PDFInfo
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- WO2024171653A1 WO2024171653A1 PCT/JP2024/000148 JP2024000148W WO2024171653A1 WO 2024171653 A1 WO2024171653 A1 WO 2024171653A1 JP 2024000148 W JP2024000148 W JP 2024000148W WO 2024171653 A1 WO2024171653 A1 WO 2024171653A1
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- frequency band
- information
- surplus power
- transmission waveform
- transmission
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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
- 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
- H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
Definitions
- the present disclosure relates to a terminal, a base station, a communication method, and an integrated circuit.
- the 5th generation mobile communication system (5G: 5th Generation mobile communication systems) has features such as large capacity and ultra-high speed (eMBB: enhanced Mobile Broadband), massive device-to-device connection (mMTC: massive Machine Type Communication), and ultra-reliable and low latency communication (URLLC), and provides wireless communication flexibly to meet a wide variety of needs.
- eMBB enhanced Mobile Broadband
- mMTC massive Device-to-device connection
- URLLC ultra-reliable and low latency communication
- the 3rd Generation Partnership Project (3GPP) an international standardization organization, is working on the specification of New Radio (NR) as one of the 5G wireless interfaces.
- NR New Radio
- 3GPP TS38.214 V17.4.0 “NR Physical layer procedures for data (Release 17),” December 2022.
- 3GPP TS38.321 V17.3.0 “NR; Medium Access Control (MAC) protocol specification (Release 17),” December 2022.
- 3GPP TS38.133 V17.8.0 “NR; Requirements for support of radio resource management (Release 17),” December 2022.
- Non-limiting examples of the present disclosure contribute to providing a terminal, a base station, a communication method, and an integrated circuit that can appropriately transmit signals in the uplink.
- a terminal includes a control circuit that, in communication using multiple frequency bands, determines information regarding excess power of an uplink in a first frequency band among the multiple frequency bands based on a transmission waveform of the first frequency band and a transmission waveform of a second frequency band different from the first frequency band among the multiple frequency bands, and a transmission circuit that transmits information regarding the excess power.
- signals can be transmitted appropriately in the uplink.
- FIG. 13 is a diagram showing an example of the relationship between the value of P CMAX,f,c and the transmission power level.
- FIG. 1 shows an example of the relationship between the transmission power level and the actual value in dB units.
- Block diagram showing a partial configuration example of a terminal A diagram showing an example of Multiple entry PHR MAC-CE A diagram showing an example of Multiple entry PHR MAC-CE A diagram showing an example of Multiple entry PHR MAC-CE A diagram showing an example of Multiple entry PHR MAC-CE A diagram showing an example of Multiple entry PHR MAC-CE Flowchart showing an example of the operation of a terminal Block diagram showing a configuration example of a base station Block diagram showing an example of a terminal configuration Diagram of an example architecture for a 3GPP NR system Schematic diagram showing functional separation between NG-RAN and 5GC Sequence diagram of the RRC (Radio Resource Control) connection setup/reconfiguration procedure Schematic diagram showing usage scenarios for enhanced Mobile BroadBand (eMBB), massive Machine Type Communications (mMTC), and Ultra Reliable and Low Latency Communications (URLLC).
- eMBB enhanced Mobile BroadBand
- mMTC massive Machine Type Communications
- URLLC Ultra Reliable and Low Latency Communications
- FR1 Frequency Range 1
- FR2 Frequency Range 2
- LTE Long Term Evolution
- 3G 3rd Generation mobile communication systems
- NR is expected to ensure a communication area (or coverage) equivalent to that of radio access technologies (RATs) such as LTE or 3G, in other words, to ensure appropriate communication quality.
- RATs radio access technologies
- 3GPP Release 17 e.g., referred to as "Rel. 17”
- Release 18 e.g., referred to as "Rel. 18”
- a terminal transmits and receives data in accordance with, for example, a layer 1 control signal (e.g., DCI: Downlink Control Information) on a downlink control channel (e.g., PDCCH: Physical Downlink Control Channel) from a base station (e.g., also called gNB) or resource allocation indicated by layer 3 Radio Resource Control (RRC) (see, for example, non-patent documents 4 to 7).
- a layer 1 control signal e.g., DCI: Downlink Control Information
- PDCCH Physical Downlink Control Channel
- RRC Radio Resource Control
- a terminal transmits an uplink data channel (e.g., PUSCH: Physical Uplink Shared Channel) in accordance with a resource allocation (e.g., Grant or UL grant) from a base station.
- an uplink data channel e.g., PUSCH: Physical Uplink Shared Channel
- a resource allocation e.g., Grant or UL grant
- PUSCH transmission waveform [PUSCH transmission waveform]
- DFT-s-OFDM Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing
- CP-OFDM Cyclic Prefix-OFDM
- DFT-s-OFDM Compared to CP-OFDM, DFT-s-OFDM has a lower peak-to-average power ratio (PAPR) of the transmitted signal and higher power utilization efficiency, making it a transmission waveform that can ensure wide uplink coverage.
- CP-OFDM has high compatibility with Multiple-Input Multiple-Output (MIMO), making it an effective transmission waveform for high-efficiency transmission (e.g., multiple rank or multiple layer transmission in spatial multiplexing transmission) in environments with high reception quality (e.g., SNR: Signal-to-Interference and Noise power Ratio).
- MIMO Multiple-Input Multiple-Output
- the PUSCH transmission waveform is set semi-statically by RRC (see, for example, non-patent document 7).
- the transmission waveform of Message 3 (Msg.3) PUSCH in the 4-step random access procedure is determined based on the parameter "msg3-transformPrecoder" set by RRC.
- the transmission waveform of Message A (Msg.A) PUSCH in the 2-step random access procedure is determined based on the parameter "msgA-transformPrecoder" set by RRC. Note that if msgA-transformPrecoder is not set by RRC, the transmission waveform of Msg.A PUSCH may be determined based on msg3-transformPrecoer.
- the transmission waveform of a PUSCH that is dynamically scheduled by DCI format 0-0 is determined based on the parameter "msg3-transformPrecoder" set by RRC.
- the transmission waveform of a PUSCH (e.g., DG-PUSCH) that is dynamically scheduled by DCI format 0-1 or DCI format 0-2 is determined based on the parameter "transformPrecoder" included in the pusch-Config information element (IE) configured by RRC. Note that if transformPrecoder is not configured by RRC, the transmission waveform of a PUSCH that is dynamically scheduled by DCI format 0-1 or DCI format 0-2 may be determined based on msg3-transformPrecoder.
- IE pusch-Config information element
- the transmission waveform of a PUSCH (e.g., CG-PUSCH: Configured grant-PUSCH) transmitted based on resource allocation instructed by RRC, which is layer 3, or semi-fixed resource allocation by Activation DCI, is determined based on the parameter "transformPrecoder" included in the configuredGrantConfig IE, which is set by RRC. Note that if transformPrecoder is not set by RRC, the transmission waveform of CG-PUSCH may be determined based on msg3-transformPrecoder.
- a terminal feeds back a Power Headroom Report (PHR) including information on uplink surplus power (PH: Power Headroom) to a base station.
- PHR Power Headroom Report
- the base station may dynamically control uplink resource allocation and transmission power of the terminal, for example, based on the PHR.
- MAC-CE Medium Access Control-Control Element
- Figure 1 shows an example of a single entry PHR MAC-CE, which is one type of MAC-CE.
- R indicates a reserved bit (e.g., 1 bit).
- PH indicates uplink surplus power
- the field size is 6 bits.
- the relationship between the PH values shown in FIG. 1 and the PH levels corresponding to the PH values is given, for example, in FIG. 3 (see, for example, non-patent document 8).
- the relationship between each PH level shown in FIG. 3 and the actual value in dB units is given, for example, in FIG. 4 (see, for example, non-patent document 9).
- P indicates a field (e.g., 1 bit) in FR1 indicating whether or not to apply power backoff for power control
- FR2 indicates a field (e.g., 1 bit) indicating whether or not the applied Power management-Maximum Power Reduction (P-MPR) value is smaller than a threshold value (e.g., "P-MPR_00")
- P-MPR Power management-Maximum Power Reduction
- P CMAX,f,c indicates the maximum transmission power P CMAX,f,c of the terminal used to calculate the value of PH included in the PHR, and the field size is 6 bits.
- the relationship between the value of P CMAX,f,c shown in Fig. 1 and the corresponding transmission power level is given, for example, in Fig. 5 (see, for example, Non-Patent Document 8).
- the relationship between each transmission power level shown in Fig. 5 and the actual value in dB is given, for example, in Fig. 6 (see, for example, Non-Patent Document 9).
- MPE indicates a field (e.g., 2 bits) that indicates the transmit power backoff value to meet the Maximum Permissible Exposure (MPE) requirements in FR2.
- Figure 2 shows an example of a Multiple entry PHR MAC-CE, which is one type of MAC-CE.
- C i denotes a field (eg, one bit for each serving cell) indicating whether or not a field including information regarding PH for the serving cell of ServingCellIndex i exists.
- R indicates a reserved bit (e.g., 1 bit).
- V indicates a field that indicates whether the PH value is based on real transmission or reference format.
- PH indicates uplink surplus power
- the field size is 6 bits.
- the relationship between the PH values shown in FIG. 2 and the PH levels corresponding to the PH values is given, for example, in FIG. 3 (see, for example, non-patent document 8).
- the relationship between each PH level shown in FIG. 3 and the actual value in dB units is given, for example, in FIG. 4 (see, for example, non-patent document 9).
- P indicates a field (e.g., 1 bit) in FR1 that indicates whether or not to apply power backoff for power control
- a field e.g., 1 bit
- a threshold value e.g., "P-MPR_00
- P CMAX,f,c indicates the maximum transmission power P CMAX,f,c of the terminal used to calculate the value of PH included in the PHR, and the field size is 6 bits.
- the relationship between the value of P CMAX,f,c shown in Fig. 2 and the corresponding transmission power level is given, for example, in Fig. 5 (see, for example, Non-Patent Document 8).
- the relationship between each transmission power level shown in Fig. 5 and the actual value in dB is given, for example, in Fig. 6 (see, for example, Non-Patent Document 9).
- MPE indicates a field (e.g., 2 bits) that indicates the transmission power backoff value to satisfy the MPE requirements in FR2.
- uplink transmission control e.g., PHR
- DFT-s-OFDM will be configured to ensure coverage for terminals at the cell edge, where improved uplink coverage is expected.
- cell-edge terminals may have situations where they transmit PUSCH while ensuring high reception quality (e.g., SINR: Signal-to-Interference Noise Ratio) due to instantaneous fluctuations in the channel or interference environment.
- SINR Signal-to-Interference Noise Ratio
- the transmission waveform is set quasi-statically (e.g., if there are restrictions on the settings)
- a terminal with a transmission waveform set to CP-OFDM if coverage is significantly reduced due to instantaneous fluctuations in the channel or interference environment, there may be a situation in which the terminal switches to DFT-s-OFDM to improve power efficiency and transmits PUSCH.
- the transmission waveform is set quasi-statically, it may be difficult for a terminal with a transmission waveform set to CP-OFDM to switch the transmission waveform to DFT-s-OFDM in accordance with instantaneous fluctuations in the channel or interference environment to improve power efficiency.
- DWS dynamic waveform switching
- DFT-s-OFDM and CP-OFDM have different power utilization efficiencies, it is desirable to appropriately control the uplink transmission power in addition to the terminal's transmission waveform in order to appropriately switch the terminal's transmission waveform.
- dynamic transmission waveform switching in order for the base station to appropriately control the transmission waveform and the terminal's uplink transmission power, for example, it may be possible to use information on the uplink surplus power of a transmission waveform (hereinafter also referred to as the "target waveform") that is a candidate for dynamic switching in addition to information on the uplink surplus power of the transmission waveform currently set in the terminal.
- a terminal feeds back information about the uplink excess power of the transmission waveform currently set in the terminal, but does not feed back information about the uplink excess power of a transmission waveform that is a candidate for dynamic switching.
- Non-Patent Document 10 feedback of information (e.g., the value of P CMAX,f,c ) regarding the surplus power of a transmission waveform not currently set in the terminal (e.g., a transmission waveform (Target waveform) that is a candidate for dynamic switching) is being considered (e.g., see Non-Patent Document 10).
- CA carrier aggregation
- DC dual connectivity
- CA/DC is often not suitable for uplink transmission from terminals at the edge of a cell, but is expected to be applied in the center of a cell where the communication distance between the base station and the terminal is short.
- the Multiple entry PHR MAC-CE shown in Figure 2 may be used to feed back information regarding excess uplink power, but existing PHR MAC-CEs do not take dynamic transmission waveform switching into consideration.
- DWS configured carriers or cells For example, for carriers or cells to which dynamic transmit waveform switching (DWS) is applied (hereinafter also referred to as "DWS configured carriers or cells"), it is expected that, for example, information regarding the surplus transmit power of a transmit waveform (target waveform) that is not currently set in the terminal will be fed back, as described above. Furthermore, even for carriers or cells to which dynamic transmit waveform switching is not applied in CA/DC, if the carrier or cell shares an RF (Radio Frequency) amplifier with a DWS configured carrier or cell, the uplink surplus power may differ due to switching of the transmit waveform in the DWS configured carrier or cell. For this reason, there is room for consideration regarding the method of feeding back information regarding uplink surplus power when DWS is applied in scenarios to which CA/DC is applied.
- RF Radio Frequency
- a method for determining information regarding excess uplink power in dynamic uplink transmit waveform switching in a scenario in which CA/DC is applied is described.
- the terminal in dynamic uplink transmission waveform switching, takes into account the transmission waveform of the carrier or cell set for the terminal as well as the transmission waveform of other carriers or cells, and appropriately feeds back information regarding surplus power to the base station, and the base station uses the fed-back information to schedule the uplink for the terminal.
- a communication system includes, for example, at least one base station and at least one terminal.
- FIG. 7 is a block diagram showing an example of the configuration of a portion of a base station 100 according to an embodiment of the present disclosure
- FIG. 8 is a block diagram showing an example of the configuration of a portion of a terminal 200 according to an embodiment of the present disclosure.
- a receiver receives information (e.g., PH) about surplus power of the uplink in a first frequency band, which is determined based on a transmission waveform of a first frequency band among the multiple frequency bands and a transmission waveform of a second frequency band different from the first frequency band among the multiple frequency bands, in communication (e.g., CA/DC) using multiple frequency bands (e.g., carriers or cells).
- a controller e.g., corresponding to a control circuit
- uplink transmission e.g., uplink resource allocation or uplink transmission power
- a control unit determines information (e.g., PH) regarding surplus power of the uplink in a first frequency band among the multiple frequency bands in communication (e.g., CA/DC) using multiple frequency bands (e.g., carriers or cells) based on a transmission waveform of the first frequency band and a transmission waveform of a second frequency band different from the first frequency band among the multiple frequency bands.
- a transmission unit (e.g., corresponding to a transmission circuit) transmits the information regarding the surplus power.
- a plurality of carriers or cells are configured for the terminal 200.
- the terminal 200 feeds back, for example, information on uplink surplus power (or surplus transmission power) for the plurality of configured carriers or cells.
- terminal 200 determines and feeds back, in addition to information regarding the uplink excess power corresponding to a transmission waveform (hereinafter also referred to as the "current waveform") currently set in the DWS configured carrier or cell, information regarding the uplink excess power corresponding to a transmission waveform (Target waveform) that is not currently set in the DWS configured carrier or cell (e.g., the value of P CMAX,f,c ).
- current waveform information regarding the uplink excess power corresponding to a transmission waveform that is not currently set in the DWS configured carrier or cell
- the terminal 200 may calculate (or determine) information regarding the uplink surplus power of the DWS configured carrier or cell based on any of the following assumptions regarding signal transmission (e.g., PUSCH transmission) in another carrier or cell (e.g., a carrier or cell in which DWS is not configured (or applied)):
- terminal 200 may assume that a PUSCH is transmitted based on the transmission waveform currently set in the carrier or cell.
- the settings actually assigned to the PUSCH may be used, or a reference format may be used.
- Terminal 200 may assume that PUSCH is not transmitted in a carrier or cell in which DWS is not configured.
- terminal 200 determines and feeds back information regarding the excess power (e.g., the value of P CMAX,f,c ) corresponding to (or assumed) the transmission waveform currently set for that carrier or cell.
- the excess power e.g., the value of P CMAX,f,c
- the terminal 200 may calculate information regarding the uplink surplus power of a carrier or cell in which DWS is not configured, assuming that the PUSCH is transmitted by applying the "reference transmission waveform" in the DWS configured carrier or cell.
- the current waveform currently set in a DWS configured carrier or cell may be set as the reference transmission waveform.
- the terminal 200 may determine information regarding the uplink excess power of a carrier or cell in which DWS is not configured, assuming that in a DWS configured carrier or cell, a PUSCH is transmitted using the transmission waveform currently configured in that carrier or cell.
- a transmission waveform (e.g., a target waveform) that is not currently configured in a DWS configured carrier or cell may be set as the reference transmission waveform.
- the terminal 200 may determine information regarding the uplink excess power of a carrier or cell in which DWS is not configured, assuming that a PUSCH is transmitted in a DWS configured carrier or cell using a transmission waveform (target waveform) that is not currently configured in the carrier or cell.
- a transmission waveform target waveform
- the reference transmission waveform may be predetermined by a standard, may be semi-statically configured in terminal 200 by higher layer signaling such as RRC, or may be dynamically configured in terminal 200 by DCI or the like.
- the terminal 200 when the terminal 200 reports information regarding the uplink surplus power, in addition to the settings regarding the transmission waveform of the DWS configured carrier or cell, the settings regarding the transmission waveform of other carriers or cells are determined, so that the base station 100 can obtain information regarding the surplus transmission power of the terminal 200 that takes into account the transmission waveform of other carriers or cells.
- This allows the base station 100 to perform appropriate scheduling for the terminal 200 when DWS is configured in a CA/DC scenario.
- Figure 9 shows an example of a portion of a Multiple PHR MAC-CE in this embodiment.
- Figure 9 shows an example where DWS is configured in the Primary Cell (PCell) and DWS is not configured in Serving cell 1. That is, in Figure 9, the PCell corresponds to a "DWS configured carrier or cell" and Serving cell 1 corresponds to a "carrier or cell where DWS is not configured.”
- PCell Primary Cell
- Serving cell 1 corresponds to a "carrier or cell where DWS is not configured.”
- information regarding the uplink surplus power of the PCell includes information regarding the uplink surplus power of the transmission waveform (current waveform) currently set to the PCell (P CMAX,f,c,2,current waveform ) ("P CMAX,f,c 2,current” in Figure 9), as well as information regarding the uplink surplus power of a transmission waveform (target waveform) that is not currently set to the PCell (P CMAX,f,c,2,target waveform ) ("P CMAX,f,c 2,target” in Figure 9).
- the terminal 200 may apply, for example, any of the above-mentioned assumptions (e.g., either assumption 1 or assumption 2) in serving cell 1.
- information regarding the uplink surplus power of serving cell 1 includes information (P CMAX,f,c,3 ) regarding the uplink surplus transmission power of the transmission waveform (current waveform) currently set in serving cell 1 ("P CMAX,f, c 3" in FIG. 9).
- terminal 200 calculates information regarding the excess power of the current waveform of serving cell 1, it may assume that, for example, a reference transmission waveform is applied in the PCell to transmit the PUSCH.
- terminal 200 determines information regarding the excess power of the uplink in a certain carrier or cell among multiple carriers or cells, based on the transmission waveform of that carrier or cell and the transmission waveform of another carrier or cell among the multiple carriers or cells that is different from the certain carrier or cell.
- terminal 200 can appropriately determine information regarding the excess power of the uplink of each carrier or cell, taking into account the transmission waveform of each of the multiple carriers or cells to which CA/DC is applied.
- base station 100 can appropriately schedule the uplink for terminal 200 using the fed-back information, taking into account the transmission waveform of each of the multiple carriers or cells to which CA/DC is applied.
- the terminal 200 can properly transmit signals in the uplink.
- the information on the uplink surplus power of the DWS configured carrier or cell includes information on the uplink surplus power of a transmission waveform (current waveform) currently set in the DWS configured carrier or cell, as well as information on the surplus power of a transmission waveform (target waveform) not currently set in the DWS configured carrier or cell. Also, in the above embodiment, the case where either of the above-mentioned assumption 1 or assumption 2 is applied to other carriers or cells when calculating information on the uplink surplus power of the DWS configured carrier or cell has been described.
- the calculation is not limited to using one of the above-mentioned assumptions (e.g., assumption 1 and assumption 2) for other carriers or cells, and may include information about surplus power in each of multiple assumptions.
- either the information regarding the uplink excess power corresponding to the current waveform of a DWS configured carrier or cell, or the information regarding the excess transmit power corresponding to the target waveform of a DWS configured carrier or cell may include information regarding the excess power in each of multiple assumptions.
- Figure 10 shows an example of a portion of the Multiple PHR MAC-CE in variant 1.
- Figure 10 shows an example where DWS is configured on a PCell. That is, in Figure 10, the PCell corresponds to a "DWS configured carrier or cell.”
- the information on the uplink surplus power of the PCell includes information on the uplink surplus power of a transmission waveform (current waveform) currently set to the PCell (P CMAX,f,c,2-1,current waveform ) ("P CMAX,f,c 2-1,current” in FIG. 10 ) as well as information on the surplus power of a transmission waveform (target waveform) not currently set to the PCell (P CMAX,f,c,2-1,target waveform ) ("P CMAX,f,c 2-1,target” in FIG. 10 ).
- the terminal 200 may apply, for example, the above-mentioned assumption 1 (assuming that a PUSCH is transmitted using a transmission waveform currently set to another carrier or cell) in another carrier or cell (a carrier or cell in which DWS is not set).
- the information on the uplink surplus power of the PCell includes information on the uplink surplus power of the transmission waveform (current waveform) currently set to the PCell (P CMAX,f,c,2-2,current waveform ) ("P CMAX,f,c 2-2,current” in FIG. 10), as well as information on the surplus power of the transmission waveform (target waveform) not currently set to the PCell (P CMAX,f,c,2-2,target waveform ) ("P CMAX,f,c 2-2,target” in FIG. 10).
- the terminal 200 may apply, for example, the above-mentioned assumption 2 (assuming that PUSCH is not transmitted in other carriers or cells) in other carriers or cells (carriers or cells in which DWS is not set).
- the information regarding surplus power corresponding to the current waveform of the PCell includes P CMAX,f,c,2-1,current waveform corresponding to assumption 1 and P CMAX,f,c,2-2,current waveform corresponding to assumption 2.
- the information regarding surplus power corresponding to the target waveform of the PCell includes P CMAX,f,c,2-1,target waveform corresponding to assumption 1 and P CMAX,f,c,2-2,target waveform corresponding to assumption 2.
- the terminal 200 can report the uplink surplus transmission power of the DWS configured carrier or cell, assuming both the case where PUSCH is actually transmitted in other carriers or cells (carriers or cells where DWS is not configured) and the case where PUSCH is not transmitted. This allows the base station 100 to schedule the uplink for the terminal 200, taking into account multiple assumptions regarding carriers or cells where DWS is not configured.
- the information on the uplink surplus power of the DWS configured carrier or cell includes information on the uplink surplus power of a transmission waveform (current waveform) currently set in the DWS configured carrier or cell, as well as information on the surplus power of a transmission waveform (target waveform) not currently set in the DWS configured carrier or cell. Also, in the above embodiment, the case where either of the above-mentioned assumption 1 or assumption 2 is applied to other carriers or cells when calculating information on the uplink surplus power of the DWS configured carrier or cell has been described.
- terminal 200 when terminal 200 calculates information regarding surplus power corresponding to each of the current and target waveforms of a DWS configured carrier or cell, it may apply any of the above-mentioned assumptions (e.g., assumption 1 and assumption 2) to each other carrier or cell (or individually to each other carrier or cell) as assumptions for other carriers or cells (e.g., carriers or cells to which DWS is not applied).
- assumptions e.g., assumption 1 and assumption 2
- assumptions for other carriers or cells e.g., carriers or cells to which DWS is not applied.
- the terminal 200 may individually determine either assumption 1 (e.g., an assumption that a PUSCH is transmitted based on a transmission waveform set in the other carrier or cell) or assumption 2 (e.g., an assumption that a PUSCH is not transmitted in the other carrier or cell).
- assumption 1 e.g., an assumption that a PUSCH is transmitted based on a transmission waveform set in the other carrier or cell
- assumption 2 e.g., an assumption that a PUSCH is not transmitted in the other carrier or cell.
- Which assumption is applied to each carrier or cell may be notified from terminal 200 to base station 100 in a field in the PHR MAC CE, may be set in terminal 200 by higher layer signaling such as RRC from base station 100, or may be set in terminal 200 by DCI from base station 100, for example.
- Figure 11 shows an example of a portion of the Multiple PHR MAC-CE in variant 2.
- Figure 11 shows an example where DWS is configured on a PCell. That is, in Figure 11, the PCell corresponds to a "DWS configured carrier or cell.”
- information regarding the uplink surplus power of the PCell includes information regarding the uplink surplus transmission power of the transmission waveform (current waveform) currently set to the PCell (P CMAX,f,c,2,current waveform ) ("P CMAX,f,c 2,current” in FIG. 11), as well as information regarding the surplus power of a transmission waveform (target waveform) not currently set to the PCell (P CMAX,f,c,2,target waveform ) ("P CMAX,f,c 2,target” in FIG. 11).
- the terminal 200 when it calculates information regarding the surplus power of each of the current and target waveforms of the PCell, it may apply, for example, either Assumption 1 or Assumption 2 described above individually to each of the other carriers or cells (carriers or cells to which DWS is not applied).
- a field related to the notification may be included in the PHR MAC-CE.
- “T i " in Fig. 11 indicates a field (e.g., one bit for each serving cell) indicating whether assumption 1 or assumption 2 is applied to the serving cell of ServingCellIndex i (an example of the other carrier or cell).
- terminal 200 in other carriers or cells (carriers or cells in which DWS is not set), terminal 200 can flexibly switch between actually transmitting PUSCH (e.g., assumption 1) and not transmitting PUSCH (e.g., assumption 1) depending on the situation of each cell. This allows base station 100 to schedule uplinks for terminal 200, taking into account the assumptions of PUSCH transmission in each carrier or cell in which DWS is not set.
- the terminal 200 feeds back information regarding the uplink excess power of a transmission waveform (current waveform) currently set in the DWS configured carrier or cell, as well as information regarding the excess transmission power of a transmission waveform (target waveform) not currently set in the DWS configured carrier or cell (e.g., the value of P CMAX,f,c ).
- the terminal 200 may calculate information regarding the uplink surplus power of a certain DWS configured carrier or cell among the multiple DWS configured carriers or cells, assuming that a reference transmission waveform is applied to transmit a PUSCH in another DWS configured carrier or cell among the multiple DWS configured carriers or cells.
- Any of Options 1 to 3 described above may be applied to the reference transmission waveform, and multiple pieces of information regarding excess transmission power may be reported assuming both Option 1 and Option 2, or it may be individually set for each cell as to whether Option 1 or Option 2 is to be assumed.
- any of the methods described in the above-mentioned embodiment 1, variant 1, or variant 2 may be applied to assumptions regarding other carriers or cells (carriers or cells to which DWS is not applied).
- the terminal 200 can feed back to the base station 100 information regarding surplus power according to the status of multiple DWS configured carriers or cells. This allows the base station 100 to schedule the uplink for the terminal 200, taking into account the transmission waveforms in each of the DWS configured carriers/cells.
- a plurality of carriers or cells are configured for the terminal 200.
- the terminal 200 feeds back, for example, information on uplink surplus power for the plurality of configured carriers or cells.
- terminal 200 determines and feeds back information regarding the uplink excess power corresponding to a transmission waveform (current waveform) currently set in the DWS configured carrier or cell, as well as information regarding the uplink excess power corresponding to a transmission waveform (Target waveform) not currently set in the DWS configured carrier or cell (e.g., the value of P CMAX,f,c ).
- the terminal 200 may calculate (or determine) information regarding the uplink surplus power of a DWS configured carrier or cell by applying any of the following assumptions regarding signal transmission (e.g., PUSCH transmission) in another carrier or cell (e.g., a carrier or cell in which DWS is not configured (or applied)):
- terminal 200 may assume that a PUSCH is transmitted based on the transmission waveform currently set in the carrier or cell.
- the settings actually assigned to the PUSCH may be used, or a reference format may be used.
- Terminal 200 may assume that PUSCH is not transmitted in a carrier or cell in which DWS is not configured.
- information regarding excess uplink power in a DWS configured carrier or cell may be determined, for example, based on any of embodiment 1 and variations 1 to 3.
- terminal 200 determines and feeds back information regarding the excess power (e.g., the value of P CMAX,f,c ) corresponding to (or assumed) the transmission waveform currently set for that carrier or cell.
- the excess power e.g., the value of P CMAX,f,c
- the terminal 200 may calculate information regarding the uplink surplus power of a carrier or cell in which DWS is not configured, assuming a case in which PUSCH is transmitted based on the transmission waveform (current waveform) currently set in the DWS configured carrier or cell, and a case in which PUSCH is transmitted based on a transmission waveform (target waveform) not currently set in the DWS configured carrier or cell. Therefore, information regarding the uplink surplus power of a carrier or cell in which DWS is not configured may include information regarding the surplus power assuming PUSCH transmission based on the current waveform of the DWS configured carrier or cell, and information regarding the surplus power assuming PUSCH transmission based on the target waveform of the DWS configured carrier or cell.
- the terminal 200 when reporting information about uplink surplus power, can report information about surplus power corresponding to each candidate setting for the transmission waveform of another carrier or cell.
- This allows the base station 100 to obtain information about the surplus power of the terminal 200 that takes into account dynamic transmission waveform switching (DWS) of another carrier or cell.
- DWS dynamic transmission waveform switching
- This allows the base station 100 to perform appropriate scheduling for the terminal 200 when DWS is set in a CA/DC scenario.
- Figure 12 shows an example of a portion of a Multiple PHR MAC-CE in this embodiment.
- Figure 12 shows an example of a case where DWS is configured in the PCell and DWS is not configured in serving cell 1. That is, in Figure 12, the PCell corresponds to a "DWS configured carrier or cell" and serving cell 1 corresponds to a "carrier or cell where DWS is not configured.”
- information regarding the uplink surplus power of the PCell includes information regarding the uplink surplus power of the transmission waveform (current waveform) currently set to the PCell (P CMAX,f,c,2,current waveform ) ("P CMAX,f,c 2,current” in FIG. 12), as well as information regarding the uplink surplus power of a transmission waveform (Target waveform) that is not currently set to the PCell (P CMAX,f,c,2,target waveform ) ("P CMAX,f,c 2,target” in FIG. 12).
- the terminal 200 may apply, for example, any of the above-mentioned assumptions (e.g., either assumption 1 or assumption 2) in serving cell 1.
- information regarding the uplink excess power of serving cell 1 includes information regarding the uplink excess transmission power of the transmission waveform (current waveform) currently set in serving cell 1.
- the information may include information (P CMAX,f,c,3,current waveform ) regarding the excess power assuming that the PUSCH is transmitted using the transmission waveform (current waveform) currently set in the PCell ("P CMAX,f,c 3,current” in FIG. 12), and information (P CMAX,f,c,3,target waveform) regarding the excess power assuming that the PUSCH is transmitted using a transmission waveform (target waveform) that is not currently set in the PCell ("P CMAX,f, c 3,target” in FIG. 12).
- terminal 200 can appropriately determine information regarding the excess power of the uplink of each carrier or cell, taking into account the transmission waveform of each of the multiple carriers or cells to which CA/DC is applied, as in embodiment 1. Furthermore, base station 100 can appropriately schedule the uplink for terminal 200, using the fed-back information and taking into account the transmission waveform of each of the multiple carriers or cells to which CA/DC is applied.
- the terminal 200 can properly transmit signals in the uplink.
- the terminal 200 feeds back to the base station 100 information regarding surplus power that takes into account multiple transmission waveforms that can be set for a DWS configured carrier or cell.
- This allows the base station 100 to perform scheduling for the terminal 200 for carriers or cells where DWS is not configured, taking into account multiple transmission waveforms that can be set for a DWS configured carrier or cell.
- a plurality of carriers or cells are configured for the terminal 200.
- the terminal 200 feeds back, for example, information on uplink surplus power for the plurality of configured carriers or cells.
- terminal 200 determines and feeds back information regarding the uplink excess power corresponding to a transmission waveform (current waveform) currently set in the DWS configured carrier or cell, as well as information regarding the uplink excess power corresponding to a transmission waveform (Target waveform) not currently set in the DWS configured carrier or cell (e.g., the value of P CMAX,f,c ).
- the terminal 200 may calculate (or determine) information regarding the uplink surplus power of a DWS configured carrier or cell by applying any of the following assumptions regarding signal transmission (e.g., PUSCH transmission) in another carrier or cell (e.g., a carrier or cell in which DWS is not configured (or applied)):
- terminal 200 may assume that a PUSCH is transmitted based on the transmission waveform currently set in the carrier or cell.
- the settings actually assigned to the PUSCH may be used, or a reference format may be used.
- Terminal 200 may assume that PUSCH is not transmitted in a carrier or cell in which DWS is not configured.
- information regarding excess uplink power in a DWS configured carrier or cell may be determined, for example, based on any of embodiment 1 and variations 1 to 3.
- terminal 200 determines and feeds back information regarding the excess power (e.g., the value of P CMAX,f,c ) corresponding to (or assumed) the transmission waveform currently set for that carrier or cell.
- the excess power e.g., the value of P CMAX,f,c
- the terminal 200 may individually set the assumption of a DWS configured carrier or cell to the carrier or cell in which DWS is not configured.
- the terminal 200 may individually apply to a carrier or cell in which DWS is not configured either the assumption that a PUSCH is transmitted by applying a reference transmission waveform in a DWS configured carrier or cell as in embodiment 1 (hereinafter referred to as "Type B"), or the assumption that a PUSCH is transmitted using a transmission waveform (current waveform) currently set in a DWS configured carrier or cell, or a transmission waveform (target waveform) not currently set in a DWS configured carrier or cell (hereinafter referred to as "Type A”) as in embodiment 2.
- the reference transmission waveform used in Type B may be any of Options 1 to 3 described in the first embodiment, and multiple pieces of information regarding excess transmission power may be reported assuming both Option 1 and Option 2, and it may be individually set for each cell as to whether Option 1 or Option 2 is to be assumed.
- Which of Type A or Type B to apply to each carrier or cell may be notified from terminal 200 to base station 100 in a field in the PHR MAC CE, may be set in terminal 200 by higher layer signaling such as RRC from base station 100, or may be set in terminal 200 by DCI from base station 100.
- the terminal 200 when reporting information regarding uplink surplus power, can report information regarding surplus power corresponding to each candidate setting regarding the transmission waveform of another carrier or cell by applying Type A to a certain carrier or cell.
- Type A the transmission waveform of another carrier or cell
- Type B the overhead associated with reporting information regarding surplus power can be reduced compared to Type A.
- Type A may be applied to a carrier or cell that shares an RF amplifier with a carrier or cell in which DWS is set.
- This allows the base station 100 to obtain information regarding the surplus power of the terminal 200 that takes into account dynamic transmission waveform switching (e.g., current waveform and target waveform) for carriers or cells that may be affected by dynamic transmission waveform switching of other carriers or cells. Therefore, when DWS is set in a CA/DC scenario, the base station 100 can perform appropriate scheduling for the terminal 200.
- dynamic transmission waveform switching e.g., current waveform and target waveform
- Type B may be applied to a carrier or cell that does not share an RF amplifier with the carrier or cell for which DWS is set. This makes the carrier or cell less susceptible to the effects of dynamic transmission waveform switching of other carriers or cells, and also suppresses an increase in overhead associated with reporting information related to surplus power.
- Figure 13 shows an example of a portion of a Multiple PHR MAC-CE in this embodiment.
- Figure 13 shows an example where DWS is configured on the PCell, and DWS is not configured on serving cell 1 and serving cell 2. That is, in Figure 13, the PCell corresponds to a "DWS configured carrier or cell", and serving cell 1 and serving cell 2 correspond to "carriers or cells where DWS is not configured".
- information regarding the uplink surplus power of the PCell includes information regarding the uplink surplus power of the transmission waveform (current waveform) currently set to the PCell (P CMAX,f,c,2,current waveform ) ("P CMAX,f,c 2,current” in FIG. 13), as well as information regarding the uplink surplus power of a transmission waveform (Target waveform) that is not currently set to the PCell (P CMAX,f,c,2,target waveform ) ("P CMAX,f,c 2,target” in FIG. 13).
- the terminal 200 may apply any of the above-mentioned assumptions (e.g., either assumption 1 or assumption 2) to, for example, serving cell 1 and serving cell 2.
- assumptions e.g., either assumption 1 or assumption 2
- information regarding the uplink surplus power of each of serving cell 1 and serving cell 2 includes information regarding the uplink surplus transmission power of the transmission waveform (current waveform) currently set in each of serving cell 1 and serving cell 2.
- terminal 200 when terminal 200 calculates information regarding surplus power in serving cell 1 and serving cell 2, it applies Type A to serving cell 1 and Type B to serving cell 2.
- a field related to the notification may be included in the PHR MAC-CE.
- “T i " in Fig. 13 indicates a field (e.g., one bit for each serving cell) indicating which of Type A and Type B is applied to ServingCellIndex i.
- the field for serving cell 1 to which Type A is applied includes information (P CMAX,f,c,3,current waveform) regarding the surplus power assuming that the PUSCH is transmitted using the transmission waveform (current waveform ) currently set in the PCell ("P CMAX,f,c 3,current” in FIG. 13), and information (P CMAX,f, c,3,target waveform) regarding the surplus power assuming that the PUSCH is transmitted using a transmission waveform (target waveform) that is not currently set in the PCell (“P CMAX,f, c 3,target” in FIG. 13).
- the field for serving cell 2 to which Type B is applied includes information (P CMAX,f,c,4 ) ("P CMAX,f,c 4" in FIG. 13) regarding surplus power assuming a case in which a reference transmission waveform is applied to the PCell and a PUSCH is transmitted.
- the terminal 200 can report to serving cell 1 information regarding surplus power corresponding to each candidate setting for the transmission waveform of another carrier or cell (e.g., PCell).
- the overhead associated with reporting information regarding surplus power to serving cell 2 can be reduced compared to when Type A is applied (e.g., serving cell 1).
- terminal 200 can appropriately determine information regarding the excess power of the uplink of each carrier or cell, taking into account the transmission waveform of each of the multiple carriers or cells to which CA/DC is applied, as in embodiment 1. Furthermore, base station 100 can appropriately schedule the uplink for terminal 200, using the fed-back information and taking into account the transmission waveform of each of the multiple carriers or cells to which CA/DC is applied.
- the terminal 200 can properly transmit signals in the uplink.
- the terminal 200 determines, for each carrier or cell where DWS is not configured, multiple possible transmission waveforms that can be configured for the DWS configured carrier or cell, and can feed back information regarding surplus power according to the respective conditions (e.g., sharing status of RF amplifiers) of the carrier or cell where DWS is not configured to the base station 100.
- the respective conditions e.g., sharing status of RF amplifiers
- the terminal 200 may notify the base station 100 of information regarding which carriers or cells share an RF amplifier in CA/DC (e.g., RF design information of the terminal 200) for each band combination using terminal capability signaling (UE capability signaling).
- UE capability signaling terminal capability signaling
- information regarding whether Type A or Type B should be applied to each carrier or cell does not need to be notified from terminal 200 to base station 100 by a field in the PHR MAC CE, but can be set in terminal 200 by base station 100 via RRC or the like, thereby reducing the overhead of MAC CE.
- FIG. 14 is a flowchart showing an example of the operation of the terminal 200.
- the terminal 200 acquires information related to PHR transmission (S101).
- the information related to PHR transmission may include, for example, information related to the trigger of PHR transmission (e.g., a timer, a threshold for path loss, etc.), and information related to the contents of the PHR (e.g., a threshold for P-MPR, a reference transmission setting, etc.).
- the terminal 200 for example, sets the CA/DC (S102).
- the terminal 200 determines whether or not dynamic transmission waveform switching (DWS) is set (or enabled) (S103).
- DWS dynamic transmission waveform switching
- the terminal 200 determines information regarding the uplink surplus power in each of the multiple carriers or cells used for CA/DC based on the transmission waveform of the carrier or cell and the transmission waveform of other carriers or cells, and reports the determined information regarding the surplus power to the base station 100 (S104).
- the terminal 200 reports information about surplus power (e.g., existing PHR) to the base station 100, for example, according to an existing method (S105).
- surplus power e.g., existing PHR
- Fig. 15 is a block diagram showing an example of the configuration of a base station 100 according to embodiment 1.
- the base station 100 includes a control unit 101, a higher-level control signal generation unit 102, a downlink control information generation unit 103, an encoding unit 104, a modulation unit 105, a signal allocation unit 106, a transmission unit 107, a reception unit 108, an extraction unit 109, a demodulation unit 110, and a decoding unit 111.
- control unit 101 higher-level control signal generating unit 102, downlink control information generating unit 103, encoding unit 104, modulation unit 105, signal allocation unit 106, extraction unit 109, demodulation unit 110, and decoding unit 111 shown in FIG. 15 may be included in the control unit shown in FIG. 7.
- the receiving unit 108 shown in FIG. 15 may be included in the receiving unit shown in FIG. 7.
- the control unit 101 determines information regarding uplink transmission (e.g., PUSCH transmission) to the terminal 200 or information regarding the PHR based on, for example, information input from the decoding unit 111, and outputs the determined information to at least one of the upper control signal generating unit 102 and the downlink control information generating unit 103.
- the information regarding the PUSCH transmission may include, for example, information regarding the transmission waveform, resource allocation information, or information regarding the Modulation and Coding Scheme (MCS).
- MCS Modulation and Coding Scheme
- the control unit 101 outputs the determined information to the extraction unit 109, the demodulation unit 110, and the decoding unit 111.
- the control unit 101 also determines, for example, information related to a downlink signal for transmitting a higher-level control signal or downlink control information (for example, MCS and radio resource allocation), and outputs the determined information to the coding unit 104, the modulation unit 105, and the signal allocation unit 106.
- the control unit 101 also outputs, for example, information related to a downlink signal (for example, a data signal or a higher-level control signal) to the downlink control information generation unit 103.
- the upper control signal generating unit 102 generates an upper layer control signal bit sequence based on, for example, information input from the control unit 101, and outputs the upper layer control signal bit sequence to the encoding unit 104.
- the downlink control information generating unit 103 generates a downlink control information (e.g., DCI) bit string based on information input from the control unit 101, for example, and outputs the generated DCI bit string to the encoding unit 104. Note that the control information may be transmitted to multiple terminals.
- a downlink control information e.g., DCI
- the control information may be transmitted to multiple terminals.
- the encoding unit 104 encodes the downlink data signal, the bit string input from the higher-level control signal generating unit 102, or the DCI bit string input from the downlink control information generating unit 103, for example, based on information input from the control unit 101.
- the encoding unit 104 outputs the encoded bit string to the modulation unit 105.
- the modulation unit 105 modulates the encoded bit sequence input from the encoding unit 104 based on information input from the control unit 101, for example, and outputs the modulated signal (e.g., a symbol sequence) to the signal allocation unit 106.
- the modulated signal e.g., a symbol sequence
- the signal allocation unit 106 maps the symbol sequence (including, for example, a downlink data signal or a control signal) input from the modulation unit 105 to the radio resource based on, for example, information indicating the radio resource input from the control unit 101.
- the signal allocation unit 106 outputs the downlink signal to which the signal has been mapped to the transmission unit 107.
- the transmitting unit 107 performs, for example, orthogonal frequency division multiplexing (OFDM) transmission waveform generation processing on the signal input from the signal allocation unit 106.
- OFDM orthogonal frequency division multiplexing
- the transmitting unit 107 performs inverse fast Fourier transform (IFFT) processing on the signal and adds a CP to the signal after IFFT.
- IFFT inverse fast Fourier transform
- the transmitting unit 107 also performs RF processing on the signal, for example, D/A conversion or up-conversion, and transmits the wireless signal to the terminal 200 via an antenna.
- the receiving unit 108 performs RF processing such as downconvert or A/D conversion on the uplink signal received from the terminal 200 via an antenna.
- RF processing such as downconvert or A/D conversion
- the receiving unit 108 performs Fast Fourier Transform (FFT) processing on the received signal, for example, and outputs the resulting frequency domain signal to the extraction unit 109.
- FFT Fast Fourier Transform
- the extraction unit 109 extracts the radio resource portion from which the uplink signal (e.g., PUSCH or PUCCH) is transmitted from the received signal input from the receiving unit 108 based on, for example, information input from the control unit 101, and outputs the extracted radio resource portion to the demodulation unit 110.
- the uplink signal e.g., PUSCH or PUCCH
- the demodulation unit 110 demodulates the uplink signal (e.g., PUSCH or PUCCH) input from the extraction unit 109 based on, for example, information input from the control unit 101.
- the demodulation unit 110 outputs the demodulation result to, for example, the decoding unit 111.
- the decoding unit 111 performs error correction decoding of the uplink signal (e.g., PUSCH or PUCCH) based on, for example, information input from the control unit 101 and the demodulation result input from the demodulation unit 110, and obtains a decoded received bit sequence. For example, when the decoded received bit sequence includes information about surplus power (e.g., PHR), the decoding unit 111 outputs the information about surplus power to the control unit 101.
- the uplink signal e.g., PUSCH or PUCCH
- the decoding unit 111 outputs the information about surplus power to the control unit 101.
- FIG. 16 is a block diagram showing a configuration example of a terminal 200 according to an embodiment of the present disclosure.
- the terminal 200 includes a receiving unit 201, an extracting unit 202, a demodulating unit 203, a decoding unit 204, a control unit 205, an encoding unit 206, a modulating unit 207, a signal allocating unit 208, and a transmitting unit 209.
- the extraction unit 202, demodulation unit 203, decoding unit 204, control unit 205, encoding unit 206, modulation unit 207, and signal allocation unit 208 shown in FIG. 16 may be included in the control unit shown in FIG. 8.
- the transmission unit 209 shown in FIG. 16 may be included in the transmission unit shown in FIG. 8.
- the receiving unit 201 receives, for example, a downlink signal (for example, a downlink data signal or downlink control information) from the base station 100 via an antenna, and performs RF processing such as downconvert or A/D conversion on the wireless received signal to obtain a received signal (baseband signal).
- a downlink signal for example, a downlink data signal or downlink control information
- RF processing such as downconvert or A/D conversion
- the receiving unit 201 also performs FFT processing on the received signal to convert the received signal into the frequency domain.
- the receiving unit 201 outputs the received signal to the extraction unit 202.
- the extraction unit 202 extracts a radio resource portion that may include downlink control information from the received signal input from the receiving unit 201 based on information about the radio resource of the downlink control information input from the control unit 205, for example, and outputs the extracted radio resource portion to the demodulation unit 203.
- the extraction unit 202 also extracts a radio resource portion that includes a downlink data signal based on information about the radio resource of the data signal input from the control unit 205, and outputs the extracted radio resource portion to the demodulation unit 203.
- the demodulation unit 203 demodulates the signal (e.g., PDCCH or PDSCH) input from the extraction unit 202 based on information input from the control unit 205, and outputs the demodulation result to the decoding unit 204.
- the signal e.g., PDCCH or PDSCH
- the decoding unit 204 performs error correction decoding of the PDCCH or PDSCH, for example, using the demodulation result input from the demodulation unit 203, and obtains, for example, an upper layer control signal or downlink control information.
- the decoding unit 204 outputs the upper layer control signal and the downlink control information to the control unit 205.
- the decoding unit 204 may also generate a response signal (for example, ACK/NACK) based on the decoding result of the PDSCH.
- the control unit 205 performs uplink transmission control (e.g., determining the transmission waveform for PUSCH transmission and the information included in PHR transmission) according to the above-mentioned method based on, for example, information on PUSCH transmission obtained from a signal (e.g., upper layer control signal or downlink control information) input from the decoding unit 204 or information on PHR transmission.
- the control unit 205 outputs the determined information to, for example, the encoding unit 206 and the signal allocation unit 208.
- the encoding unit 206 encodes an uplink data signal (UL data signal) or an uplink control signal, for example, based on information input from the control unit 205.
- the encoding unit 206 outputs the encoded bit string to the modulation unit 207.
- the modulation unit 207 for example, modulates the encoded bit sequence input from the encoding unit 206 and outputs the modulated signal (symbol sequence) to the signal allocation unit 208.
- the signal allocation unit 208 maps the signal (e.g., a sequence) input from the modulation unit 207 to a radio resource, for example, based on information input from the control unit 205.
- the signal allocation unit 208 outputs, for example, an uplink signal to which the signal has been mapped, to the transmission unit 209.
- the transmitting unit 209 generates a transmission signal waveform, such as OFDM, for the signal input from the signal allocation unit 208.
- a transmission signal waveform such as OFDM
- the transmitting unit 209 performs IFFT processing on the signal and adds a CP to the signal after IFFT.
- a DFT unit may be added (not shown) after the modulation unit 207 or before the signal allocation unit 208.
- the transmitting unit 209 performs RF processing, such as D/A conversion and up-conversion, on the transmission signal, and transmits a radio signal to the base station 100 via an antenna.
- the second or third embodiment may be applied to a case where there are multiple DWS configured carriers or cells.
- the terminal 200 feeds back information on the uplink surplus power of a transmission waveform (current waveform) that is not currently set in the carrier or cell (for example, the value of P CMAX,f,c ) in addition to information on the uplink surplus power of a transmission waveform (Target waveform) that is not currently set in the carrier or cell.
- the terminal 200 may calculate information regarding the uplink surplus power of a DWS configured carrier or cell, assuming both the case where the current waveform is applied and the case where the target waveform is applied in other DWS configured carriers or cells.
- a PCell is used as an example of a DWS configured carrier or cell
- a serving cell is used as an example of a carrier/cell in which DWS is not configured (another carrier or cell).
- the DWS configured carrier or cell and the carrier/cell in which DWS is not configured are not limited to these, and may be other types of carriers, cells, or frequency bands.
- the resources are not limited to carriers or cells, and may be in other frequency band units or other resource units.
- the transmission waveforms are not limited to the two types of DFT-s-OFDM and CP-OFDM, but may be other transmission waveforms, and the number of applicable transmission waveforms may be three or more.
- the units used to calculate the power values in each of the above-mentioned embodiments may be true values (linear domain) or dB units (log domain).
- the channel used for uplink transmission is not limited to PUSCH and PUCCH, but may be other channels.
- the type of information to be transmitted is not limited to data, but may be other types of information (e.g., uplink control signals).
- one embodiment of the present disclosure is not limited to uplink transmission, but may be applied to downlink transmission or sidelink transmission.
- the present disclosure may be applied to communication between terminals, such as sidelink communication, for example.
- the downlink control channel, downlink data channel, uplink control channel, and uplink data channel are not limited to PDCCH, PDSCH, PUCCH, and PUSCH, respectively, and may be control channels with other names.
- RRC signaling is assumed as the higher layer signaling, but it may be replaced with Medium Access Control (MAC) signaling and notification in DCI, which is physical layer signaling.
- MAC Medium Access Control
- (supplement) Information indicating whether terminal 200 supports the functions, operations or processes described in each of the above-mentioned embodiments and each supplementary note may be transmitted (or notified) from terminal 200 to base station 100, for example, as capability information or capability parameters of terminal 200.
- the capability information may include information elements (IEs) that individually indicate whether the terminal 200 supports at least one of the functions, operations, or processes described in each of the above-mentioned embodiments, modifications, and supplements.
- the capability information may include information elements that indicate whether the terminal 200 supports a combination of any two or more of the functions, operations, or processes described in each of the above-mentioned embodiments, modifications, and supplements.
- the base station 100 may, for example, determine (or decide or assume) the functions, operations, or processing that are supported (or not supported) by the terminal 200 that transmitted the capability information.
- the base station 100 may perform operations, processing, or control according to the results of the determination based on the capability information.
- the base station 100 may control processing related to the uplink based on the capability information received from the terminal 200.
- the terminal 200 does not support some of the functions, operations, or processes described in the above-mentioned embodiments, modifications, and supplementary notes may be interpreted as meaning that such some of the functions, operations, or processes are restricted in the terminal 200. For example, information or requests regarding such restrictions may be notified to the base station 100.
- the information regarding the capabilities or limitations of the terminal 200 may be defined in a standard, for example, or may be implicitly notified to the base station 100 in association with information already known at the base station 100 or information transmitted to the base station 100.
- the downlink control signal (information) related to the present disclosure may be a signal (information) transmitted by a PDCCH of a physical layer, or a signal (information) transmitted by a MAC CE (Control Element) or RRC of a higher layer.
- the downlink control signal may be a signal (information) that is specified in advance.
- the uplink control signal (information) related to the present disclosure may be a signal (information) transmitted on the PUCCH of the physical layer, or a signal (information) transmitted on the MAC CE or RRC of a higher layer.
- the uplink control signal may also be a signal (information) that is specified in advance.
- the uplink control signal may also be replaced with UCI (uplink control information), 1st stage SCI (sidelink control information), or 2nd stage SCI.
- the base station may be a TRP (Transmission Reception Point), a cluster head, an access point, an RRH (Remote Radio Head), an eNodeB (eNB), a gNodeB (gNB), a BS (Base Station), a BTS (Base Transceiver Station), a parent device, a gateway, or the like.
- the base station in sidelink communication, may be replaced with a terminal.
- the base station may be a relay device that relays communication between an upper node and a terminal.
- the base station may be a roadside unit.
- the present disclosure may be applied to any of uplink, downlink, and sidelink.
- the present disclosure may be applied to PUSCH, PUCCH, and PRACH in uplink, PDSCH, PDCCH, and PBCH in downlink, and PSSCH (Physical Sidelink Shared Channel), PSCCH (Physical Sidelink Control Channel), and PSBCH (Physical Sidelink Broadcast Channel) in sidelink.
- PSSCH Physical Sidelink Shared Channel
- PSCCH Physical Sidelink Control Channel
- PSBCH Physical Sidelink Broadcast Channel
- PDCCH, PDSCH, PUSCH, and PUCCH are examples of a downlink control channel, a downlink data channel, an uplink data channel, and an uplink control channel.
- PSCCH and PSSCH are examples of a sidelink control channel and a sidelink data channel.
- PBCH and PSBCH are examples of a broadcast channel, and PRACH is an example of a random access channel.
- the present disclosure may be applied to both data channels and control channels.
- the channels of the present disclosure may be replaced with the data channels PDSCH, PUSCH, and PSSCH, and the control channels PDCCH, PUCCH, PBCH, PSCCH, and PSBCH.
- a reference signal is a signal known to both a base station and a terminal, and may be referred to as an RS (Reference Signal) or a pilot signal.
- the reference signal may be any of DMRS, CSI-RS (Channel State Information - Reference Signal), TRS (Tracking Reference Signal), PTRS (Phase Tracking Reference Signal), CRS (Cell-specific Reference Signal), and SRS (Sounding Reference Signal).
- the unit of time resource is not limited to one or a combination of slots and symbols, but may be, for example, a time resource unit such as a frame, a superframe, a subframe, a slot, a time slot, a subslot, a minislot, a symbol, an OFDM (Orthogonal Frequency Division Multiplexing Access) symbol, or an SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol, or may be another time resource unit.
- the number of symbols included in one slot is not limited to the number of symbols exemplified in the above-mentioned embodiment, and may be another number of symbols.
- the present disclosure may be applied to both licensed and unlicensed bands.
- the present disclosure may be applied to any of communication between a base station and a terminal (Uu link communication), communication between terminals (Sidelink communication), and V2X (Vehicle to Everything) communication.
- the channels of the present disclosure may be replaced with PSCCH, PSSCH, PSFCH (Physical Sidelink Feedback Channel), PSBCH, PDCCH, PUCCH, PDSCH, PUSCH, and PBCH.
- the present disclosure may also be applied to terrestrial networks, non-terrestrial networks (NTN: Non-Terrestrial Networks) that use satellites or highly advanced pseudo satellites (HAPS).
- NTN Non-Terrestrial Networks
- HAPS highly advanced pseudo satellites
- the present disclosure may also be applied to terrestrial networks with large cell sizes and ultra-wideband transmission networks, where the transmission delay is large compared to the symbol length or slot length.
- An antenna port refers to a logical antenna (antenna group) consisting of one or more physical antennas. That is, an antenna port does not necessarily refer to one physical antenna, but may refer to an array antenna consisting of multiple antennas. For example, the number of physical antennas that an antenna port is composed of is not specified, and it is specified as the smallest unit that a terminal can transmit a reference signal. In addition, an antenna port may be specified as the smallest unit to multiply the weighting of a precoding vector.
- 5G fifth generation of mobile phone technology
- NR radio access technology
- the system architecture as a whole assumes an NG-RAN (Next Generation - Radio Access Network) comprising gNBs.
- the gNBs provide the UE-side termination of the NG radio access user plane (SDAP/PDCP/RLC/MAC/PHY) and control plane (RRC) protocols.
- the gNBs are connected to each other via an Xn interface.
- the gNBs are also connected to the Next Generation Core (NGC) via a Next Generation (NG) interface, more specifically to the Access and Mobility Management Function (AMF) (e.g., a specific core entity performing AMF) via an NG-C interface, and to the User Plane Function (UPF) (e.g., a specific core entity performing UPF) via an NG-U interface.
- the NG-RAN architecture is shown in Figure 17 (see, for example, 3GPP TS 38.300 v15.6.0, section 4).
- the NR user plane protocol stack includes the PDCP (Packet Data Convergence Protocol (see TS 38.300, section 6.4)) sublayer, the RLC (Radio Link Control (see TS 38.300, section 6.3)) sublayer, and the MAC (Medium Access Control (see TS 38.300, section 6.2)) sublayer, which are terminated on the network side at the gNB.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- a new Access Stratum (AS) sublayer SDAP: Service Data Adaptation Protocol
- SDAP Service Data Adaptation Protocol
- a control plane protocol stack has also been defined for NR (see, for example, TS 38.300, section 4.4.2).
- An overview of Layer 2 functions is given in clause 6 of TS 38.300.
- the functions of the PDCP sublayer, RLC sublayer, and MAC sublayer are listed in clauses 6.4, 6.3, and 6.2 of TS 38.300, respectively.
- the functions of the RRC layer are listed in clause 7 of TS 38.300.
- the Medium-Access-Control layer handles multiplexing of logical channels and scheduling and scheduling-related functions, including handling various numerologies.
- the physical layer is responsible for coding, PHY HARQ processing, modulation, multi-antenna processing, and mapping of signals to appropriate physical time-frequency resources.
- the physical layer also handles the mapping of transport channels to physical channels.
- the physical layer provides services to the MAC layer in the form of transport channels.
- a physical channel corresponds to a set of time-frequency resources used for the transmission of a particular transport channel, and each transport channel is mapped to a corresponding physical channel.
- the physical channels include the PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel) as uplink physical channels, and the PDSCH (Physical Downlink Shared Channel), PDCCH (Physical Downlink Control Channel), and PBCH (Physical Broadcast Channel) as downlink physical channels.
- PRACH Physical Random Access Channel
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- PDSCH Physical Downlink Shared Channel
- PDCCH Physical Downlink Control Channel
- PBCH Physical Broadcast Channel
- NR use cases/deployment scenarios may include enhanced mobile broadband (eMBB), ultra-reliable low-latency communications (URLLC), and massive machine type communication (mMTC), which have diverse requirements in terms of data rate, latency, and coverage.
- eMBB enhanced mobile broadband
- URLLC ultra-reliable low-latency communications
- mMTC massive machine type communication
- eMBB is expected to support peak data rates (20 Gbps in the downlink and 10 Gbps in the uplink) and effective (user-experienced) data rates that are about three times higher than the data rates offered by IMT-Advanced.
- URLLC stricter requirements are imposed on ultra-low latency (0.5 ms for user plane latency in UL and DL, respectively) and high reliability (1-10-5 within 1 ms).
- mMTC may require preferably high connection density (1,000,000 devices/km 2 in urban environments), wide coverage in adverse environments, and extremely long battery life (15 years) for low-cost devices.
- OFDM numerology e.g., subcarrier spacing, OFDM symbol length, cyclic prefix (CP) length, number of symbols per scheduling interval
- OFDM numerology e.g., subcarrier spacing, OFDM symbol length, cyclic prefix (CP) length, number of symbols per scheduling interval
- low latency services may preferably require a shorter symbol length (and therefore a larger subcarrier spacing) and/or fewer symbols per scheduling interval (also called TTI) than mMTC services.
- deployment scenarios with large channel delay spreads may preferably require a longer CP length than scenarios with short delay spreads.
- Subcarrier spacing may be optimized accordingly to maintain a similar CP overhead.
- NR may support one or more subcarrier spacing values. Correspondingly, subcarrier spacings of 15 kHz, 30 kHz, 60 kHz... are currently considered.
- a resource grid of subcarriers and OFDM symbols is defined for the uplink and downlink, respectively.
- Each element of the resource grid is called a resource element and is identified based on a frequency index in the frequency domain and a symbol position in the time domain (see 3GPP TS 38.211 v15.6.0).
- Figure 18 shows the functional separation between NG-RAN and 5GC.
- the logical nodes of NG-RAN are gNB or ng-eNB.
- 5GC has logical nodes AMF, UPF, and SMF.
- gNBs and ng-eNBs host the following main functions: - Radio Resource Management functions such as Radio Bearer Control, Radio Admission Control, Connection Mobility Control, dynamic allocation (scheduling) of resources to UEs in both uplink and downlink; - IP header compression, encryption and integrity protection of the data; - Selection of an AMF at UE attach time when routing to an AMF cannot be determined from information provided by the UE; - Routing of user plane data towards the UPF; - Routing of control plane information towards the AMF; - Setting up and tearing down connections; - scheduling and transmission of paging messages; Scheduling and transmission of system broadcast information (AMF or Operation, Admission, Maintenance (OAM) origin); - configuration of measurements and measurement reporting for mobility and scheduling; - Transport level packet marking in the uplink; - Session management; - Support for network slicing; - Management of QoS flows and mapping to data radio bearers; - Support for UEs in RRC_INACTIVE state; - NAS
- the Access and Mobility Management Function hosts the following main functions: – the ability to terminate Non-Access Stratum (NAS) signalling; - NAS signalling security; - Access Stratum (AS) security control; - Core Network (CN) inter-node signaling for mobility between 3GPP access networks; - Reachability to idle mode UEs (including control and execution of paging retransmissions); - Managing the registration area; - Support for intra-system and inter-system mobility; - Access authentication; - Access authorization, including checking roaming privileges; - Mobility management control (subscription and policy); - Support for network slicing; – Selection of Session Management Function (SMF).
- NAS Non-Access Stratum
- AS Access Stratum
- CN Core Network
- the User Plane Function hosts the following main functions: - anchor point for intra/inter-RAT mobility (if applicable); - external PDU (Protocol Data Unit) Session Points for interconnection with data networks; - Packet routing and forwarding; - Packet inspection and policy rule enforcement for the user plane part; - Traffic usage reporting; - an uplink classifier to support routing of traffic flows to the data network; - Branching Point to support multi-homed PDU sessions; QoS processing for the user plane (e.g. packet filtering, gating, UL/DL rate enforcement); - Uplink traffic validation (mapping of SDF to QoS flows); - Downlink packet buffering and downlink data notification triggering.
- PDU Protocol Data Unit Session Points for interconnection with data networks
- Packet routing and forwarding Packet inspection and policy rule enforcement for the user plane part
- Traffic usage reporting - an uplink classifier to support routing of traffic flows to the data network
- - Branching Point to support multi-homed PDU
- Session Management Function hosts the following main functions: - Session management; - Allocation and management of IP addresses for UEs; - Selection and control of UPF; - configuration of traffic steering in the User Plane Function (UPF) to route traffic to the appropriate destination; - Control policy enforcement and QoS; - Notification of downlink data.
- Figure 19 shows some of the interactions between the UE, gNB, and AMF (5GC entities) when the UE transitions from RRC_IDLE to RRC_CONNECTED in the NAS portion (see TS 38.300 v15.6.0).
- RRC is a higher layer signaling (protocol) used for UE and gNB configuration.
- the AMF prepares UE context data (which includes, for example, PDU session context, security keys, UE Radio Capability, UE Security Capabilities, etc.) and sends it to the gNB with an INITIAL CONTEXT SETUP REQUEST.
- the gNB then activates AS security together with the UE. This is done by the gNB sending a SecurityModeCommand message to the UE and the UE responding with a SecurityModeComplete message to the gNB.
- the gNB then sends an RRCReconfiguration message to the UE, and upon receiving an RRCReconfigurationComplete from the UE, the gNB performs reconfiguration to set up Signaling Radio Bearer 2 (SRB2) and Data Radio Bearer (DRB). For signaling-only connections, the RRCReconfiguration steps are omitted, since SRB2 and DRB are not set up. Finally, the gNB notifies the AMF that the setup procedure is complete with an INITIAL CONTEXT SETUP RESPONSE.
- SRB2 Signaling Radio Bearer 2
- DRB Data Radio Bearer
- a 5th Generation Core (5GC) entity e.g., AMF, SMF, etc.
- a control circuit that, during operation, establishes a Next Generation (NG) connection with a gNodeB
- a transmitter that, during operation, transmits an initial context setup message to the gNodeB via the NG connection such that a signaling radio bearer between the gNodeB and a user equipment (UE) is set up.
- the gNodeB transmits Radio Resource Control (RRC) signaling including a resource allocation configuration information element (IE) to the UE via the signaling radio bearer.
- RRC Radio Resource Control
- IE resource allocation configuration information element
- Figure 20 shows some of the use cases for 5G NR.
- the 3rd generation partnership project new radio (3GPP NR) considers three use cases that were envisioned by IMT-2020 to support a wide variety of services and applications.
- the first phase of specifications for enhanced mobile-broadband (eMBB) has been completed.
- Current and future work includes standardization for ultra-reliable and low-latency communications (URLLC) and massive machine-type communications (mMTC), in addition to expanding support for eMBB.
- Figure 20 shows some examples of envisioned usage scenarios for IMT beyond 2020 (see, for example, ITU-R M.2083 Figure 2).
- the URLLC use cases have stringent requirements for performance such as throughput, latency, and availability. It is envisioned as one of the enabling technologies for future applications such as wireless control of industrial or manufacturing processes, remote medical surgery, automation of power transmission and distribution in smart grids, and road safety.
- URLLC's ultra-high reliability is supported by identifying technologies that meet the requirements set by TR 38.913.
- key requirements include a target user plane latency of 0.5 ms for UL (uplink) and 0.5 ms for DL (downlink).
- the overall URLLC requirement for a single packet transmission is a block error rate (BLER) of 1E-5 for a packet size of 32 bytes with a user plane latency of 1 ms.
- BLER block error rate
- NR URLLC can be improved in many possible ways.
- Current room for reliability improvement includes defining a separate CQI table for URLLC, more compact DCI formats, PDCCH repetition, etc.
- this room can be expanded to achieve ultra-high reliability as NR becomes more stable and more developed (with respect to the key requirements of NR URLLC).
- Specific use cases for NR URLLC in Release 15 include Augmented Reality/Virtual Reality (AR/VR), e-health, e-safety, and mission-critical applications.
- AR/VR Augmented Reality/Virtual Reality
- e-health e-safety
- mission-critical applications mission-critical applications.
- the technology enhancements targeted by NR URLLC aim to improve latency and reliability.
- Technology enhancements for improving latency include configurable numerology, non-slot-based scheduling with flexible mapping, grant-free (configured grant) uplink, slot-level repetition in data channel, and pre-emption in downlink.
- Pre-emption means that a transmission for which resources have already been allocated is stopped and the already allocated resources are used for other transmissions with lower latency/higher priority requirements that are requested later. Thus, a transmission that was already allowed is preempted by a later transmission. Pre-emption is applicable regardless of the specific service type. For example, a transmission of service type A (URLLC) may be preempted by a transmission of service type B (eMBB, etc.).
- Technology enhancements for improving reliability include a dedicated CQI/MCS table for a target BLER of 1E-5.
- the mMTC (massive machine type communication) use case is characterized by a very large number of connected devices transmitting relatively small amounts of data that are typically not sensitive to latency.
- the devices are required to be low cost and have very long battery life. From an NR perspective, utilizing very narrow bandwidth portions is one solution that saves power from the UE's perspective and allows for long battery life.
- the scope of reliability improvement in NR is expected to be broader.
- One of the key requirements for all cases, e.g. for URLLC and mMTC, is high or ultra-high reliability.
- Several mechanisms can improve reliability from a radio perspective and a network perspective.
- these areas include compact control channel information, data channel/control channel repetition, and diversity in frequency, time, and/or spatial domains. These areas are generally applicable to reliability improvement regardless of the specific communication scenario.
- NR URLLC For NR URLLC, further use cases with more stringent requirements are envisaged, such as factory automation, transportation and power distribution, with high reliability (up to 10-6 level of reliability), high availability, packet size up to 256 bytes, time synchronization up to a few ⁇ s (depending on the use case, the values can be 1 ⁇ s or a few ⁇ s depending on the frequency range and low latency of the order of 0.5 ms to 1 ms (e.g. 0.5 ms latency on the targeted user plane).
- high reliability up to 10-6 level of reliability
- high availability packet size up to 256 bytes
- time synchronization up to a few ⁇ s (depending on the use case, the values can be 1 ⁇ s or a few ⁇ s depending on the frequency range and low latency of the order of 0.5 ms to 1 ms (e.g. 0.5 ms latency on the targeted user plane).
- minislot refers to a Transmission Time Interval (TTI) that contains fewer symbols than a slot (a slot comprises 14 symbols).
- TTI Transmission Time Interval
- QoS Quality of Service
- the 5G Quality of Service (QoS) model is based on QoS flows and supports both QoS flows that require a guaranteed flow bit rate (GBR QoS flows) and QoS flows that do not require a guaranteed flow bit rate (non-GBR QoS flows).
- GRR QoS flows Guarantee flow bit rate
- non-GBR QoS flows QoS flows that do not require a guaranteed flow bit rate
- QoS flows are the finest granularity of QoS partitioning in a PDU session.
- QoS flows are identified within a PDU session by a QoS Flow ID (QFI) carried in the encapsulation header over the NG-U interface.
- QFI QoS Flow ID
- 5GC For each UE, 5GC establishes one or more PDU sessions. For each UE, the NG-RAN establishes at least one Data Radio Bearer (DRB) for the PDU session, e.g. as shown above with reference to Figure 19. Additional DRBs for the QoS flows of the PDU session can be configured later (when it is up to the NG-RAN).
- DRB Data Radio Bearer
- the NG-RAN maps packets belonging to different PDU sessions to different DRBs.
- the NAS level packet filters in the UE and 5GC associate UL and DL packets with QoS flows, whereas the AS level mapping rules in the UE and NG-RAN associate UL and DL QoS flows with DRBs.
- FIG 21 shows the non-roaming reference architecture for 5G NR (see TS 23.501 v16.1.0, section 4.23).
- An Application Function e.g. an external application server hosting 5G services as illustrated in Figure 20
- NEF Network Exposure Function
- PCF Policy Control Function
- Figure 21 further shows further functional units of the 5G architecture, namely Network Slice Selection Function (NSSF), Network Repository Function (NRF), Unified Data Management (UDM), Authentication Server Function (AUSF), Access and Mobility Management Function (AMF), Session Management Function (SMF), and Data Network (DN, e.g. operator provided services, Internet access, or third party provided services). All or part of the core network functions and application services may be deployed and run in a cloud computing environment.
- NSF Network Slice Selection Function
- NRF Network Repository Function
- UDM Unified Data Management
- AUSF Authentication Server Function
- AMF Access and Mobility Management Function
- SMSF Session Management Function
- DN Data Network
- All or part of the core network functions and application services may be deployed and run in a cloud computing environment.
- an application server e.g., an AF in a 5G architecture
- a transmitter that, in operation, transmits a request including QoS requirements for at least one of a URLLC service, an eMMB service, and an mMTC service to at least one of 5GC functions (e.g., a NEF, an AMF, an SMF, a PCF, an UPF, etc.) to establish a PDU session including a radio bearer between a gNodeB and a UE according to the QoS requirements; and a control circuit that, in operation, performs a service using the established PDU session.
- 5GC functions e.g., a NEF, an AMF, an SMF, a PCF, an UPF, etc.
- part used in this disclosure may be interchangeably used with other terms such as “circuitry”, “device”, “unit” or “module”.
- Each functional block used in the description of the above embodiments may be realized, in part or in whole, as an LSI, which is an integrated circuit, and each process described in the above embodiments may be controlled, in part or in whole, by one LSI or a combination of LSIs.
- the LSI may be composed of individual chips, or may be composed of one chip that contains some or all of the functional blocks.
- the LSI may have data input and output. Depending on the degree of integration, the LSI may be called an IC, system LSI, super LSI, or ultra LSI.
- the integrated circuit method is not limited to LSI, and may be realized by a dedicated circuit, a general-purpose processor, or a dedicated processor. Also, a field programmable gate array (FPGA) that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connections and settings of circuit cells inside the LSI, may be used.
- FPGA field programmable gate array
- the present disclosure may be realized as digital processing or analog processing.
- the present disclosure may be implemented in any type of apparatus, device, or system (collectively referred to as a communications apparatus) having communications capabilities.
- the communications apparatus may include a radio transceiver and processing/control circuitry.
- the radio transceiver may include a receiver and a transmitter, or both as functions.
- the radio transceiver (transmitter and receiver) may include an RF (Radio Frequency) module and one or more antennas.
- the RF module may include an amplifier, an RF modulator/demodulator, or the like.
- Non-limiting examples of communication devices include telephones (e.g., cell phones, smartphones, etc.), tablets, personal computers (PCs) (e.g., laptops, desktops, notebooks, etc.), cameras (e.g., digital still/video cameras), digital players (e.g., digital audio/video players, etc.), wearable devices (e.g., wearable cameras, smartwatches, tracking devices, etc.), game consoles, digital book readers, telehealth/telemedicine devices, communication-enabled vehicles or mobile transport (e.g., cars, planes, ships, etc.), and combinations of the above-mentioned devices.
- telephones e.g., cell phones, smartphones, etc.
- tablets personal computers (PCs) (e.g., laptops, desktops, notebooks, etc.)
- cameras e.g., digital still/video cameras
- digital players e.g., digital audio/video players, etc.
- wearable devices e.g., wearable cameras, smartwatches, tracking
- Communication devices are not limited to portable or mobile devices, but also include any type of equipment, device, or system that is non-portable or fixed, such as smart home devices (home appliances, lighting equipment, smart meters or measuring devices, control panels, etc.), vending machines, and any other "things” that may exist on an IoT (Internet of Things) network.
- smart home devices home appliances, lighting equipment, smart meters or measuring devices, control panels, etc.
- vending machines and any other “things” that may exist on an IoT (Internet of Things) network.
- IoT Internet of Things
- Communications include data communication via cellular systems, wireless LAN systems, communication satellite systems, etc., as well as data communication via combinations of these.
- the communication apparatus also includes devices such as controllers and sensors that are connected or coupled to a communication device that performs the communication functions described in this disclosure.
- a communication device that performs the communication functions described in this disclosure.
- controllers and sensors that generate control signals and data signals used by the communication device to perform the communication functions of the communication apparatus.
- communication equipment includes infrastructure facilities, such as base stations, access points, and any other equipment, devices, or systems that communicate with or control the various non-limiting devices listed above.
- a terminal includes a control circuit that, in communication using multiple frequency bands, determines information regarding excess power of an uplink in a first frequency band among the multiple frequency bands based on a transmission waveform of the first frequency band and a transmission waveform of a second frequency band different from the first frequency band among the multiple frequency bands, and a transmission circuit that transmits information regarding the excess power.
- dynamic transmission waveform switching is set for the first frequency band
- the control circuit determines information regarding a first surplus power corresponding to a first transmission waveform set for the first frequency band, and information regarding a second surplus power corresponding to a second transmission waveform not set for the first frequency band.
- the dynamic transmission waveform switching is not set for the second frequency band, and the control circuit determines the information regarding the first surplus power and the information regarding the second surplus power based on an assumption of signal transmission in the second frequency band.
- control circuit assumes that the signal is transmitted based on a transmission waveform set in the second frequency band.
- control circuit assumes that the signal is not transmitted in the second frequency band.
- the dynamic transmission waveform switching is not set for the second frequency band, and at least one of the first information about surplus power and the second information about surplus power includes information about surplus power assuming that the signal is transmitted based on a transmission waveform set for the second frequency band, and information about surplus power assuming that the signal is not transmitted in the second frequency band.
- control circuit individually determines, for each of the second frequency bands, whether the signal is to be transmitted based on a set transmission waveform, or whether the signal is not to be transmitted.
- dynamic transmission waveform switching is set for the multiple first frequency bands, and the control circuit determines information regarding the surplus power corresponding to a certain frequency band among the multiple first frequency bands based on a reference transmission waveform in another frequency band among the multiple first frequency bands.
- dynamic transmission waveform switching is not set for the first frequency band, and the control circuit determines information regarding the surplus power based on the transmission waveform set for the second frequency band.
- dynamic transmission waveform switching is configured for the second frequency band, and the control circuit determines information regarding the surplus power in the first frequency band based on a reference transmission waveform in the second frequency band.
- the reference transmission waveform is either a transmission waveform set in the second frequency band or a transmission waveform not set in the second frequency band.
- the reference transmission waveform is predetermined by a standard, is set in the terminal by higher layer signaling, or is set in the terminal by downlink control information.
- dynamic transmission waveform switching is set for the second frequency band;
- the information regarding the surplus power includes information regarding surplus power assuming that a signal is transmitted based on a transmission waveform set in the second frequency band, and information regarding surplus power assuming that the signal is transmitted based on a transmission waveform that is not set in the second frequency band.
- dynamic transmission waveform switching is set for the second frequency band
- the information on the surplus power corresponding to a portion of the plurality of first frequency bands includes information on surplus power based on a reference transmission waveform in the second frequency band
- the information on the surplus power corresponding to another frequency band different from the portion of the plurality of first frequency bands includes information on surplus power assuming that a signal is transmitted based on a transmission waveform set for the second frequency band, and information on surplus power assuming that the signal is transmitted based on a transmission waveform not set for the second frequency band.
- a base station includes, in communication using multiple frequency bands, a receiving circuit that receives information about excess power of an uplink in a first frequency band determined based on a transmission waveform of a first frequency band among the multiple frequency bands and a transmission waveform of a second frequency band different from the first frequency band among the multiple frequency bands, and a control circuit that controls uplink transmission based on the information about the excess power.
- a terminal determines information regarding excess power of an uplink in a first frequency band among the multiple frequency bands based on a transmission waveform of the first frequency band and a transmission waveform of a second frequency band different from the first frequency band among the multiple frequency bands, and transmits the information regarding the excess power.
- a base station in communication using multiple frequency bands, receives information about excess power of an uplink in a first frequency band determined based on a transmission waveform of a first frequency band among the multiple frequency bands and a transmission waveform of a second frequency band different from the first frequency band among the multiple frequency bands, and controls uplink transmission based on the information about the excess power.
- An embodiment of the present disclosure is useful in wireless communication systems.
- REFERENCE SIGNS LIST 100 Base station 101, 205 Control unit 102 Higher control signal generating unit 103 Downlink control information generating unit 104, 206 Encoding unit 105, 207 Modulation unit 106, 208 Signal allocation unit 107, 209 Transmission unit 108, 201 Reception unit 109, 202 Extraction unit 110, 203 Demodulation unit 111, 204 Decoding unit 200 Terminal
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Abstract
Description
NRでは、PUSCHの送信波形として、Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing(DFT-s-OFDM)、及び、Cyclic Prefix-OFDM(CP-OFDM)がサポートされている。
NRでは、端末は、基地局に対して、上りリンクにおける余剰電力(PH:Power Headroom)に関する情報を含むPower Headroom Report(PHR)をフィードバックする。基地局は、例えば、PHRに基づいて、端末の上りリンクリソース割当や送信電力を動的に制御してよい。
本開示の各実施の形態に係る通信システムは、例えば、少なくとも1つの基地局と、少なくとも1つの端末と、を備える。
本実施の形態では、端末200に対して複数のキャリア又はセル(例えば、複数の周波数帯)が設定される。端末200は、例えば、設定された複数のキャリア又はセルに対する上りリンク余剰電力(又は、余剰送信電力)に関する情報をフィードバックする。
端末200は、DWSが設定されていないキャリア又はセルでは、当該キャリア又はセルに現在設定されている送信波形に基づいてPUSCHが送信されることを想定してよい。
端末200は、DWSが設定されていないキャリア又はセルにおいてPUSCHが送信されないことを想定してよい。
Option 1では、参照送信波形として、DWS configuredキャリア又はセルに現在設定されている送信波形(current waveform)が設定されてよい。
Option 1では、参照送信波形として、DWS configuredキャリア又はセルに現在設定されていない送信波形(例えば、target waveform)が設定されてよい。
参照送信波形は、規格により予め決められるか、RRCといった上位レイヤシグナリングによって端末200に準静的に設定されるか、又は、DCI等によって端末200に動的に設定されてよい。
上記実施の形態では、DWS configuredキャリア又はセルの上りリンク余剰電力に関する情報には、DWS configuredキャリア又はセルに現在設定されている送信波形(current waveform)の上りリンク余剰電力に関する情報に加えて、DWS configuredキャリア又はセルに現在設定されていない送信波形(Target waveform)の余剰電力に関する情報が含まれる場合について説明した。また、上記実施の形態では、DWS configuredキャリア又はセルの上りリンク余剰電力に関する情報の算出の際、他キャリア又はセルに対して、上述した想定1及び想定2の何れかを適用する場合について説明した。
上記実施の形態では、DWS configuredキャリア又はセルの上りリンク余剰電力に関する情報には、DWS configuredキャリア又はセルに現在設定されている送信波形(current waveform)の上りリンク余剰電力に関する情報に加えて、DWS configuredキャリア又はセルに現在設定されていない送信波形(Target waveform)の余剰電力に関する情報が含まれる場合について説明した。また、上記実施の形態では、DWS configuredキャリア又はセルの上りリンク余剰電力に関する情報の算出の際、他キャリア又はセルに対して、上述した想定1及び想定2の何れかを適用する場合について説明した。
本実施の形態において、DWS configuredキャリア又セルは複数存在してもよい。
本実施の形態では、端末200に対して複数のキャリア又はセル(例えば、複数の周波数帯)が設定される。端末200は、例えば、設定された複数のキャリア又はセルに対する上りリンク余剰電力に関する情報をフィードバックする。
端末200は、DWSが設定されていないキャリア又はセルでは、当該キャリア又はセルに現在設定されている送信波形に基づいてPUSCHが送信されることを想定してよい。
端末200は、DWSが設定されていないキャリア又はセルにおいてPUSCHが送信されないことを想定してよい。
本実施の形態では、端末200に対して複数のキャリア又はセル(例えば、複数の周波数帯)が設定される。端末200は、例えば、設定された複数のキャリア又はセルに対する上りリンク余剰電力に関する情報をフィードバックする。
端末200は、DWSが設定されていないキャリア又はセルでは、当該キャリア又はセルに現在設定されている送信波形に基づいてPUSCHが送信されることを想定してよい。
端末200は、DWSが設定されていないキャリア又はセルにおいてPUSCHが送信されないことを想定してよい。
端末200は、CA/DCにおいてどのキャリア又はセルがRF増幅器を共有しているかに関する情報(例えば、端末200のRF設計情報)を、端末Capabilityシグナリング(UE capability signaling)を用いてバンドの組み合わせ(band combination)毎に基地局100へ通知してもよい。
図14は、端末200の動作例を示すフローチャートである。
図15は、実施の形態1に係る基地局100の構成例を示すブロック図である。図15において、基地局100は、制御部101と、上位制御信号生成部102と、下りリンク制御情報生成部103と、符号化部104と、変調部105と、信号割当部106と、送信部107と、受信部108と、抽出部109と、復調部110と、復号部111と、を有する。
図16は、本開示の一実施例に係る端末200の構成例を示すブロック図である。例えば、図16において、端末200は、受信部201と、抽出部202と、復調部203と、復号部204と、制御部205と、符号化部206と、変調部207と、信号割当部208と、送信部209と、を有する。
なお、実施の形態2又は実施の形態3は、DWS configuredキャリア又はセルが複数存在する場合に適用されてもよい。この場合、DWSが設定されるキャリア又はセル(DWS configuredキャリア又はセル)の上りリンク余剰電力に関する情報のフィードバックに関して、端末200は、当該キャリア又はセルに現在設定されている送信波形(current waveform)の上りリンク余剰電力に関する情報に加えて、当該キャリア又はセルに現在設定されていない送信波形(Target waveform)の余剰電力に関する情報(例えば、PCMAX,f,cの値)をフィードバックする。
上述した各実施の形態、及び、各補足に示した機能、動作又は処理を端末200がサポートするか否かを示す情報が、例えば、端末200の能力(capability)情報あるいは能力パラメータとして、端末200から基地局100へ送信(あるいは通知)されてもよい。
本開示において、本開示に関連する下り制御信号(情報)は、物理層のPDCCHで送信される信号(情報)でもよく、上位レイヤのMAC CE(Control Element)又はRRCで送信される信号(情報)でもよい。また、下り制御信号は、予め規定されている信号(情報)としてもよい。
本開示において、基地局は、TRP(Transmission Reception Point)、クラスタヘッド、アクセスポイント、RRH(Remote Radio Head)、eNodeB (eNB)、gNodeB(gNB)、BS(Base Station)、BTS(Base Transceiver Station)、親機、ゲートウェイ等でもよい。また、サイドリンク通信においては、基地局は端末に置き換えられてもよい。基地局は、上位ノードと端末の通信を中継する中継装置であってもよい。また、基地局は、路側器であってもよい。
本開示は、上りリンク、下りリンク、サイドリンクのいずれに適用してもよい。例えば、本開示を上りリンクのPUSCH、PUCCH、PRACH、下りリンクのPDSCH、PDCCH、PBCH、サイドリンクのPSSCH(Physical Sidelink Shared Channel)、PSCCH(Physical Sidelink Control Channel)、PSBCH(Physical Sidelink Broadcast Channel)に適用してもよい。
本開示は、データチャネル及び制御チャネルのいずれに適用してもよい。例えば、本開示のチャネルをデータチャネルのPDSCH、PUSCH、PSSCH、制御チャネルのPDCCH、PUCCH、PBCH、PSCCH、PSBCHに置き換えてもよい。
本開示において、参照信号は、基地局及び端末の双方で既知の信号であり、RS (Reference Signal)又はパイロット信号と呼ばれることもある。参照信号は、DMRS、CSI-RS(Channel State Information - Reference Signal)、TRS(Tracking Reference Signal)、PTRS(Phase Tracking Reference Signal)、CRS(Cell-specific Reference Signal)、 SRS(Sounding Reference Signal)のいずれかであってもよい。
本開示において、時間リソースの単位は、スロット及びシンボルの1つ又は組み合わせに限らず、例えば、フレーム、スーパーフレーム、サブフレーム、スロット、タイムスロット、サブスロット、ミニスロット又は、シンボル、OFDM(Orthogonal Frequency Division Multiplexing Access)シンボル、SC-FDMA(Single Carrier - Frequency Division Multiple Access)シンボルといった時間リソース単位でもよく、他の時間リソース単位でもよい。また、1スロットに含まれるシンボル数は、上述した実施の形態において例示したシンボル数に限定されず、他のシンボル数でもよい。
本開示は、ライセンスバンド、アンライセンスバンドのいずれに適用してもよい。
本開示は、基地局と端末との間の通信(Uuリンク通信)、端末と端末との間の通信(Sidelink通信)、V2X(Vehicle to Everything)の通信のいずれに適用してもよい。例えば、本開示のチャネルをPSCCH、PSSCH、PSFCH(Physical Sidelink Feedback Channel)、PSBCH、PDCCH、PUCCH、PDSCH、PUSCH、PBCHに置き換えてもよい。
アンテナポートは、1本又は複数の物理アンテナから構成される論理的なアンテナ(アンテナグループ)を指す。すなわち、アンテナポートは必ずしも1本の物理アンテナを指すとは限らず、複数のアンテナから構成されるアレイアンテナ等を指すことがある。例えば、アンテナポートが何本の物理アンテナから構成されるかは規定されず、端末が参照信号(Reference signal)を送信できる最小単位として規定される。また、アンテナポートはプリコーディングベクトル(Precoding vector)の重み付けを乗算する最小単位として規定されることもある。
3GPPは、100GHzまでの周波数範囲で動作する新無線アクセス技術(NR)の開発を含む第5世代携帯電話技術(単に「5G」ともいう)の次のリリースに向けて作業を続けている。5G規格の初版は2017年の終わりに完成しており、これにより、5G NRの規格に準拠した端末(例えば、スマートフォン)の試作および商用展開に移ることが可能である。
図18は、NG-RANと5GCとの間の機能分離を示す。NG-RANの論理ノードは、gNB又はng-eNBである。5GCは、論理ノードAMF、UPF、およびSMFを有する。
- 無線ベアラ制御(Radio Bearer Control)、無線アドミッション制御(Radio Admission Control)、接続モビリティ制御(Connection Mobility Control)、上りリンクおよび下りリンクの両方におけるリソースのUEへの動的割当(スケジューリング)等の無線リソース管理(Radio Resource Management)の機能;
- データのIPヘッダ圧縮、暗号化、および完全性保護;
- UEが提供する情報からAMFへのルーティングを決定することができない場合のUEのアタッチ時のAMFの選択;
- UPFに向けたユーザプレーンデータのルーティング;
- AMFに向けた制御プレーン情報のルーティング;
- 接続のセットアップおよび解除;
- ページングメッセージのスケジューリングおよび送信;
- システム報知情報(AMF又は運用管理保守機能(OAM:Operation、 Admission、 Maintenance)が発信源)のスケジューリングおよび送信;
- モビリティおよびスケジューリングのための測定および測定報告の設定;
- 上りリンクにおけるトランスポートレベルのパケットマーキング;
- セッション管理;
- ネットワークスライシングのサポート;
- QoSフローの管理およびデータ無線ベアラに対するマッピング;
- RRC_INACTIVE状態のUEのサポート;
- NASメッセージの配信機能;
- 無線アクセスネットワークの共有;
- デュアルコネクティビティ;
- NRとE-UTRAとの緊密な連携。
- Non-Access Stratum(NAS)シグナリングを終端させる機能;
- NASシグナリングのセキュリティ;
- Access Stratum(AS)のセキュリティ制御;
- 3GPPのアクセスネットワーク間でのモビリティのためのコアネットワーク(CN:Core Network)ノード間シグナリング;
- アイドルモードのUEへの到達可能性(ページングの再送信の制御および実行を含む);
- 登録エリアの管理;
- システム内モビリティおよびシステム間モビリティのサポート;
- アクセス認証;
- ローミング権限のチェックを含むアクセス承認;
- モビリティ管理制御(加入およびポリシー);
- ネットワークスライシングのサポート;
- Session Management Function(SMF)の選択。
- intra-RATモビリティ/inter-RATモビリティ(適用可能な場合)のためのアンカーポイント;
- データネットワークとの相互接続のための外部PDU(Protocol Data Unit)セッションポイント;
- パケットのルーティングおよび転送;
- パケット検査およびユーザプレーン部分のポリシールールの強制(Policy rule enforcement);
- トラフィック使用量の報告;
- データネットワークへのトラフィックフローのルーティングをサポートするための上りリンククラス分類(uplink classifier);
- マルチホームPDUセッション(multi-homed PDU session)をサポートするための分岐点(Branching Point);
- ユーザプレーンに対するQoS処理(例えば、パケットフィルタリング、ゲーティング(gating)、UL/DLレート制御(UL/DL rate enforcement);
- 上りリンクトラフィックの検証(SDFのQoSフローに対するマッピング);
- 下りリンクパケットのバッファリングおよび下りリンクデータ通知のトリガ機能。
- セッション管理;
- UEに対するIPアドレスの割当および管理;
- UPFの選択および制御;
- 適切な宛先にトラフィックをルーティングするためのUser Plane Function(UPF)におけるトラフィックステアリング(traffic steering)の設定機能;
- 制御部分のポリシーの強制およびQoS;
- 下りリンクデータの通知。
図19は、NAS部分の、UEがRRC_IDLEからRRC_CONNECTEDに移行する際のUE、gNB、およびAMF(5GCエンティティ)の間のやり取りのいくつかを示す(TS 38.300 v15.6.0参照)。
図20は、5G NRのためのユースケースのいくつかを示す。3rd generation partnership project new radio(3GPP NR)では、多種多様なサービスおよびアプリケーションをサポートすることがIMT-2020によって構想されていた3つのユースケースが検討されている。大容量・高速通信(eMBB:enhanced mobile-broadband)のための第一段階の仕様の策定が終了している。現在および将来の作業には、eMBBのサポートを拡充していくことに加えて、高信頼・超低遅延通信(URLLC:ultra-reliable and low-latency communications)および多数同時接続マシンタイプ通信(mMTC:massive machine-type communicationsのための標準化が含まれる。図20は、2020年以降のIMTの構想上の利用シナリオのいくつかの例を示す(例えばITU-R M.2083 図2参照)。
5GのQoS(Quality of Service)モデルは、QoSフローに基づいており、保証されたフロービットレートが求められるQoSフロー(GBR:Guaranteed Bit Rate QoSフロー)、および、保証されたフロービットレートが求められないQoSフロー(非GBR QoSフロー)をいずれもサポートする。したがって、NASレベルでは、QoSフローは、PDUセッションにおける最も微細な粒度のQoSの区分である。QoSフローは、NG-Uインタフェースを介してカプセル化ヘッダ(encapsulation header)において搬送されるQoSフローID(QFI:QoS Flow ID)によってPDUセッション内で特定される。
前記余剰電力に関する情報は、前記第2の周波数帯に設定された送信波形に基づいて信号が送信されることを想定した余剰電力に関する情報と、前記第2の周波数帯に設定されない送信波形に基づいて前記信号が送信されることを想定した余剰電力に関する情報、とを含む。
101、205 制御部
102 上位制御信号生成部
103 下りリンク制御情報生成部
104、206 符号化部
105、207 変調部
106、208 信号割当部
107、209 送信部
108、201 受信部
109、202 抽出部
110、203 復調部
111、204 復号部
200 端末
Claims (19)
- 複数の周波数帯を用いる通信において、前記複数の周波数帯のうち、第1の周波数帯における上りリンクの余剰電力に関する情報を、前記第1の周波数帯の送信波形、及び、前記複数の周波数帯の前記第1の周波数帯と異なる第2の周波数帯の送信波形に基づいて決定する制御回路と、
前記余剰電力に関する情報を送信する送信回路と、
を具備する端末。 - 前記第1の周波数帯に動的送信波形切り替えが設定され、
前記制御回路は、前記第1の周波数帯に設定された第1の送信波形に対応する第1の余剰電力に関する情報、及び、前記第1の周波数帯に設定されていない第2の送信波形に対応する第2の余剰電力に関する情報を決定する、
請求項1に記載の端末。 - 前記第2の周波数帯に前記動的送信波形切り替えが設定されず、
前記制御回路は、前記第2の周波数帯における信号の送信の想定に基づいて、前記第1の余剰電力に関する情報、及び、前記第2の余剰電力に関する情報を決定する、
請求項2に記載の端末。 - 前記制御回路は、前記第2の周波数帯に設定された送信波形に基づいて前記信号が送信されることを想定する、
請求項3に記載の端末。 - 前記制御回路は、前記第2の周波数帯において前記信号が送信されないことを想定する、
請求項3に記載の端末。 - 前記第2の周波数帯に前記動的送信波形切り替えが設定されず、
前記第1の余剰電力に関する情報、及び、前記第2の余剰電力に関する情報の少なくとも一方は、
前記第2の周波数帯に設定された送信波形に基づいて信号が送信されることを想定した余剰電力に関する情報と、
前記第2の周波数帯において信号が送信されないことを想定した余剰電力に関する情報、とを含む、
請求項2に記載の端末。 - 前記制御回路は、複数の前記第2の周波数帯のそれぞれにおいて、設定された送信波形に基づいて前記信号が送信される想定、及び、前記信号が送信されない想定の何れか一方を個別に決定する、
請求項3に記載の端末。 - 複数の前記第1の周波数帯に動的送信波形切り替えが設定され、
前記制御回路は、前記複数の第1の周波数帯のうちの或る周波数帯に対応する前記余剰電力に関する情報を、前記複数の第1の周波数帯のうちの他の周波数帯における参照送信波形に基づいて決定する、
請求項1に記載の端末。 - 前記第1の周波数帯に動的送信波形切り替えが設定されず、
前記制御回路は、前記第2の周波数帯に設定された送信波形に基づいて、前記余剰電力に関する情報を決定する、
請求項1に記載の端末。 - 前記第2の周波数帯に動的送信波形切り替えが設定され、
前記制御回路は、前記第2の周波数帯における参照送信波形に基づいて、前記第1の周波数帯の前記余剰電力に関する情報を決定する、
請求項9に記載の端末。 - 前記参照送信波形は、前記第2の周波数帯に設定された送信波形、及び、前記第2の周波数帯に設定されていない送信波形の何れかである、
請求項10に記載の端末。 - 前記参照送信波形は、規格により予め決定される、上位レイヤシグナリングによって前記端末に設定される、又は、下り制御情報によって前記端末に設定される、
請求項10に記載の端末。 - 前記第2の周波数帯に動的送信波形切り替えが設定され、
前記余剰電力に関する情報は、
前記第2の周波数帯に設定された送信波形に基づいて信号が送信されることを想定した余剰電力に関する情報と、
前記第2の周波数帯に設定されない送信波形に基づいて前記信号が送信されることを想定した余剰電力に関する情報、とを含む、
請求項9に記載の端末。 - 前記第2の周波数帯に動的送信波形切り替えが設定され、
複数の前記第1の周波数帯のうち一部の周波数帯に対応する前記余剰電力に関する情報は、前記第2の周波数帯における参照送信波形に基づく余剰電力に関する情報を含み、
前記複数の第1の周波数帯のうち前記一部の周波数帯と異なる他の周波数帯に対応する前記余剰電力に関する情報は、
前記第2の周波数帯に設定された送信波形に基づいて信号が送信されることを想定した余剰電力に関する情報と、
前記第2の周波数帯に設定されない送信波形に基づいて前記信号が送信されることを想定した余剰電力に関する情報、とを含む、
請求項9に記載の端末。 - 複数の周波数帯を用いる通信において、前記複数の周波数帯のうちの第1の周波数帯の送信波形、及び、前記複数の周波数帯の前記第1の周波数帯と異なる第2の周波数帯の送信波形に基づいて決定された、前記第1の周波数帯における上りリンクの余剰電力に関する情報を受信する受信回路と、
前記余剰電力に関する情報に基づいて、上りリンク送信を制御する制御回路と、
を具備する基地局。 - 端末は、
複数の周波数帯を用いる通信において、前記複数の周波数帯のうち、第1の周波数帯における上りリンクの余剰電力に関する情報を、前記第1の周波数帯の送信波形、及び、前記複数の周波数帯の前記第1の周波数帯と異なる第2の周波数帯の送信波形に基づいて決定し、
前記余剰電力に関する情報を送信する、
通信方法。 - 基地局は、
複数の周波数帯を用いる通信において、前記複数の周波数帯のうちの第1の周波数帯の送信波形、及び、前記複数の周波数帯の前記第1の周波数帯と異なる第2の周波数帯の送信波形に基づいて決定された、前記第1の周波数帯における上りリンクの余剰電力に関する情報を受信し、
前記余剰電力に関する情報に基づいて、上りリンク送信を制御する、
通信方法。 - 端末の処理を制御する集積回路であって、前記処理は、
複数の周波数帯を用いる通信において、前記複数の周波数帯のうち、第1の周波数帯における上りリンクの余剰電力に関する情報を、前記第1の周波数帯の送信波形、及び、前記複数の周波数帯の前記第1の周波数帯と異なる第2の周波数帯の送信波形に基づいて決定する処理と、
前記余剰電力に関する情報を送信する処理と、
を含む、集積回路。 - 基地局の処理を制御する集積回路であって、前記処理は、
複数の周波数帯を用いる通信において、前記複数の周波数帯のうちの第1の周波数帯の送信波形、及び、前記複数の周波数帯の前記第1の周波数帯と異なる第2の周波数帯の送信波形に基づいて決定された、前記第1の周波数帯における上りリンクの余剰電力に関する情報を受信する処理と、
前記余剰電力に関する情報に基づいて、上りリンク送信を制御する処理と、
を含む、集積回路。
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018203379A1 (ja) * | 2017-05-01 | 2018-11-08 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
| US20200288412A1 (en) * | 2017-11-15 | 2020-09-10 | Convida Wireless, Llc | Method and device for power headroom reporting in 5g nr |
| JP2023020716A (ja) | 2021-07-30 | 2023-02-09 | 株式会社ブリヂストン | タイヤ |
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- 2024-01-09 CN CN202480012033.XA patent/CN120660405A/zh active Pending
- 2024-01-09 WO PCT/JP2024/000148 patent/WO2024171653A1/ja not_active Ceased
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018203379A1 (ja) * | 2017-05-01 | 2018-11-08 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
| US20200288412A1 (en) * | 2017-11-15 | 2020-09-10 | Convida Wireless, Llc | Method and device for power headroom reporting in 5g nr |
| JP2023020716A (ja) | 2021-07-30 | 2023-02-09 | 株式会社ブリヂストン | タイヤ |
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| "New WID on NR coverage enhancements", CHINA TELECOM, December 2020 (2020-12-01) |
| "NR Base Station (BS) radio transmission and reception (Release 15", 3GPP TS38.104 V15.18.0, September 2022 (2022-09-01) |
| "NR Multiplexing and channel coding (Release 17", 3GPP TS38.212 V17.4.0, December 2022 (2022-12-01) |
| "NR Physical channels and modulation (Release 17", 3GPP TS38.211 V17.4.0, December 2022 (2022-12-01) |
| "NR Physical layer procedures for control (Release 17", 3GPP TS38.213 V17.4.0, December 2022 (2022-12-01) |
| "NR Physical layer procedures for data (Release 17", 3GPP TS38.214 V17.4.0, December 2022 (2022-12-01) |
| "NR; Medium Access Control (MAC) protocol specification (Release 17", 3GPP TS38.321 V17.3.0, December 2022 (2022-12-01) |
| "NR; Requirements for support of radio resource management (Release 17", 3GPP TS38.133 V17.8.0, December 2022 (2022-12-01) |
| "RANI Chair's Notes", 3GPP TSG RAN WGI #111 |
| "Revised WID on Further NR coverage enhancements", CHINA TELECOM, March 2022 (2022-03-01) |
| YAN CHENG, HUAWEI, HISILICON: "Discussion on dynamic waveform switching for coverage enhancement", 3GPP DRAFT; R1-2210881; TYPE DISCUSSION; NR_COV_ENH2-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Toulouse, FR; 20221114 - 20221118, 7 November 2022 (2022-11-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052221444 * |
Also Published As
| Publication number | Publication date |
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| CN120660405A (zh) | 2025-09-16 |
| EP4668904A1 (en) | 2025-12-24 |
| JPWO2024171653A1 (ja) | 2024-08-22 |
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