WO2024034146A1 - Terminal, station de base, et procédé de communication - Google Patents

Terminal, station de base, et procédé de communication Download PDF

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Publication number
WO2024034146A1
WO2024034146A1 PCT/JP2022/030835 JP2022030835W WO2024034146A1 WO 2024034146 A1 WO2024034146 A1 WO 2024034146A1 JP 2022030835 W JP2022030835 W JP 2022030835W WO 2024034146 A1 WO2024034146 A1 WO 2024034146A1
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WIPO (PCT)
Prior art keywords
band
switching
terminal
bands
transmission
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PCT/JP2022/030835
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English (en)
Japanese (ja)
Inventor
浩樹 原田
拓真 中村
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株式会社Ｎｔｔドコモ
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Priority to PCT/JP2022/030835 priority Critical patent/WO2024034146A1/fr
Publication of WO2024034146A1 publication Critical patent/WO2024034146A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present disclosure relates to a terminal, a base station, and a communication method in a wireless communication system.
  • the 3rd Generation Partnership Project (3GPP) specifies the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and also specifies the next generation called Beyond 5G, 5G Evolution or 6G. is also progressing.
  • 5G also known as New Radio (NR) or Next Generation (NG)
  • NG Next Generation
  • Non-Patent Document 1 UL Tx switching schemes (across up to 3 or 4 bands with restriction of up to 2 Tx simultaneous transmission) are being considered.
  • the present invention has been made to solve the above-mentioned problems, and provides a terminal that makes it possible to suppress complexity associated with UL Tx switching schemes while realizing flexible switching of bands used for UL transmission. , the purpose of providing base stations and communication methods.
  • One aspect of the disclosure includes a transmitting unit that performs uplink transmission using N bands (N is a natural number of M or less), which are selected from M (M is a natural number of 3 or more) bands; , a control unit that controls the uplink transmission by at least assuming a specific time that should be secured in order to switch the band used in the uplink transmission from a first band to a second band.
  • One aspect of the disclosure includes a receiving unit that performs uplink reception using N (N is a natural number of M or less) bands selected from M (M is a natural number of 3 or more) bands; , a control unit that schedules the uplink transmission by at least assuming a specific time that should be secured in order to switch the band used in the uplink transmission from a first band to a second band.
  • One aspect of the disclosure includes the step of performing uplink transmission using N bands (N is a natural number equal to or less than M), which are selected from M (M is a natural number equal to or greater than 3) bands;
  • the communication method comprises the step of controlling the uplink transmission by at least assuming a specific time that should be secured in order to switch the band used in the uplink transmission from a first band to a second band.
  • FIG. 1 is a diagram for explaining a wireless communication system in an embodiment of the present invention.
  • FIG. 1 is a diagram for explaining a wireless communication system in an embodiment of the present invention.
  • FIG. 3 is a diagram showing case 1 and case 2 in UL Tx switching.
  • FIG. 3 is a diagram illustrating a configuration example of an antenna port used for transmission in each case in UL Tx switching.
  • FIG. 3 is a diagram illustrating a configuration example of an antenna port used for transmission and transmission in each case in UL Tx switching.
  • FIG. 3 is a diagram showing an example of UE Capability.
  • FIG. 3 is a diagram showing an example of RRC configuration.
  • FIG. 3 is a diagram showing an example of a switching period.
  • FIG. 3 is a diagram showing an example of a switching period.
  • FIG. 3 is a diagram showing an example of a switching period.
  • FIG. 3 is a diagram showing an example of the length of DL interruption.
  • FIG. 3 is a diagram showing cases 1 to 3 in UL Tx switching.
  • FIG. 3 is a diagram illustrating a configuration example of an antenna port used for transmission in each case in UL Tx switching.
  • FIG. 3 is a diagram showing an example of RRC configuration.
  • FIG. 3 is a diagram showing an example of a case where one band includes multiple carriers in UL Tx switching.
  • FIG. 3 is a diagram illustrating a configuration example of an antenna port used for transmission in each case in UL Tx switching.
  • FIG. 3 is a diagram illustrating a configuration example of an antenna port used for transmission in each case in UL Tx switching.
  • FIG. 3 is a diagram showing an example of a configuration when switching is performed across four bands.
  • FIG. 3 is a diagram showing cases 1 to 3 in UL Tx switching.
  • FIG. 3 is a diagram illustrating a configuration example of an antenna port used for transmission in each case in UL
  • FIG. 3 is a diagram showing an example of the configuration of an antenna port used for transmission when switching is performed across four bands.
  • FIG. 3 is a diagram illustrating a basic operation example of the embodiment.
  • FIG. 7 is a diagram for explaining a third embodiment.
  • FIG. 7 is a diagram for explaining a third embodiment.
  • 1 is a diagram showing a configuration example of a base station 10.
  • FIG. 2 is a diagram showing an example of the configuration of a terminal 20.
  • FIG. 1 is a diagram showing an example of the hardware configuration of a base station 10 or a terminal 20 in an embodiment of the present invention.
  • FIG. 1 is a diagram showing an example of the configuration of a vehicle.
  • Existing technologies are used as appropriate for the operation of the wireless communication system according to the embodiment of the present invention.
  • the existing technology is, for example, existing LTE or existing NR, but is not limited to existing LTE or NR.
  • SS Synchronization signal
  • PSS Primary SS
  • SSS Secondary SS
  • PBCH Physical broadcast channel
  • PRACH Physical broadcast channel
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc.
  • NR- the signal is used for NR, it is not necessarily specified as "NR-".
  • the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.). ) may be used.
  • configure the wireless parameters etc. may mean pre-configuring a predetermined value, or may mean that the base station 10 or Wireless parameters notified from the terminal 20 may be set.
  • FIG. 1 is a diagram showing a configuration example (1) of a wireless communication system according to an embodiment of the present invention.
  • a wireless communication system according to an embodiment of the present invention includes a base station 10 and a terminal 20, as shown in FIG. Although FIG. 1 shows one base station 10 and one terminal 20, this is just an example, and there may be a plurality of each.
  • the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
  • the physical resources of a radio signal are defined in the time domain and frequency domain, and the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or resource blocks. Good too.
  • Base station 10 transmits a synchronization signal and system information to terminal 20.
  • the synchronization signals are, for example, NR-PSS and NR-SSS.
  • System information is transmitted, for example, on NR-PBCH, and is also referred to as broadcast information.
  • the synchronization signal and system information may be called SSB (SS/PBCH block). As shown in FIG.
  • the base station 10 transmits a control signal or data to the terminal 20 on the DL (Downlink), and receives the control signal or data from the terminal 20 on the UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Furthermore, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Further, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell) and a primary cell (PCell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary SCG cell (PSCell) of another base station 10 using DC (Dual Connectivity).
  • SCell secondary cell
  • PCell primary cell
  • DC Direct Connectivity
  • the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in the DL, and transmits control signals or data to the base station 10 in the UL to receive various signals provided by the wireless communication system. Use communication services. Furthermore, the terminal 20 receives various reference signals transmitted from the base station 10, and measures the channel quality based on the reception results of the reference signals.
  • M2M Machine-to-Machine
  • the terminal 20 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs (Component Carriers)) and communicates with the base station 10.
  • carrier aggregation one PCell (Primary Cell) and one or more SCell (Secondary Cell) are used.
  • PCell Primary Cell
  • SCell Secondary Cell
  • PUCCH-SCell having PUCCH may be used.
  • FIG. 2 is a diagram for explaining an example (2) of a wireless communication system according to an embodiment of the present invention.
  • FIG. 2 shows a configuration example of a wireless communication system when DC (Dual Connectivity) is executed.
  • a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided.
  • Base station 10A and base station 10B are each connected to the core network.
  • Terminal 20 can communicate with both base station 10A and base station 10B.
  • the cell group provided by the base station 10A, which is an MN, is called an MCG (Master Cell Group), and the cell group provided by the base station 10B, which is an SN, is called an SCG (Secondary Cell Group).
  • an MCG is composed of one PCell and one or more SCells
  • an SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.
  • the processing operations in this embodiment may be executed with the system configuration shown in FIG. 1, may be executed with the system configuration shown in FIG. 2, or may be executed with a system configuration other than these.
  • the terminal 20 does not support the UL Tx switching function (uplink transmission switching function), which is a function that can switch UL transmission between 2 bands (2 carriers). There is. Even if the terminal 20 has only two transmission chains (Tx Chain), by using the UL Tx switching function, it is possible to transmit using two antenna ports on one carrier, or use one antenna port on one carrier. Operations such as transmitting to another carrier using another antenna port can be performed by switching over time.
  • UL Tx switching function uplink transmission switching function
  • the transmission chain is a physical function for transmission in the terminal 20, regardless of whether actual transmission is performed or not.
  • One transmission chain can perform transmission on one carrier.
  • the carrier transmission function unit corresponding to the carrier
  • the antenna port is an antenna that can actually perform transmission using a transmission chain (Tx Chain).
  • Tx Chain transmission chain
  • antenna port are sometimes used interchangeably.
  • the "antenna port” may also be referred to as a "port.”
  • one band has one carrier. Therefore, in this specification and claims, “band” may be replaced with “carrier”, and “carrier” may be replaced with “band”.
  • one band having one carrier is just an example, and one band may have multiple carriers. When there are multiple carriers in one band, their number and relationship may be limited, for example, up to two carriers that are consecutive in frequency. Multiple carriers within one band may be treated similarly to one UL band (carrier) in the following description.
  • the above function sets 3 or 4 UL bands (carriers) for terminals that cannot perform UL CA (Carrier Aggregation), or can only do up to 2 UL CAs, and dynamically selects one of them.
  • This function allows the base station 10 to instruct transmission on one or two UL bands (carriers).
  • the terminal 20 that supports UL CA is configured with multiple DL/UL carriers as serving cells, with the number of UL CA CCs supported by the terminal 20 being less than or equal to the number of UL CA CCs supported by the terminal 20, and the UL CC used for transmission is dynamically configured among them. can be given instructions.
  • Rel-18 UL Tx switching it is necessary to set a greater number of UL carriers than the number of UL CA CCs supported by UL CA.
  • SUL supplemental uplink
  • NUL normal uplink
  • dynamic switching but it is not intended to extend the SUL framework.
  • Rel-16 and Rel-17 the UL Tx switching of Rel-16 and Rel-17, power boosting, switching period, DL interruption, etc., and the operation of these themselves.
  • Re l-18 UL Tx switching is basically the same as Rel-16 and Rel-17.
  • Rel-16 (UL Tx switching for Rel-16)
  • the terminal 20 supports two carriers and has two transmission chains.
  • One transmission chain is fixed to one carrier, but the other transmission chain can be associated with either of the two carriers by a switch. Therefore, for example, it is possible to perform simultaneous transmission using two antenna ports with one carrier. It is also possible for each antenna port to perform transmission using one carrier and one antenna port. These methods can be dynamically switched.
  • Rel-16 UL Tx switching is called Rel-16 1Tx-2Tx switching.
  • case 1 a configuration in which each transmission chain is associated with one carrier
  • case 2 a configuration in which two transmission chains are associated with one carrier
  • Figure 4 shows the configuration of the transmission chain used for transmission in case 1 and case 2 in SUL.
  • case 1, 1T+1T means that carrier 2 is connected to transmission chain 1 and carrier 1 is connected to transmission chain 2 in the example of FIG.
  • 1P+0P in the 1T+1T state means that antenna port 2 performs transmission using carrier 1, but antenna port 1 does not perform transmission.
  • SUL two carriers cannot be set at the same time, so 1P+1P does not exist.
  • SUL does not assume the transmission of only NUL (carrier 2), so 0P+1P does not exist.
  • 0P+2P, 0P+1P in case 2 means that antenna port 1 and antenna port 2 transmit using carrier 2, or antenna port 1 only transmits using carrier 2.
  • Rel-16 1Tx-2Tx switching in inter-band CA/EN-DC has option 1, which does not allow the use of two carriers at the same time, and option 2, which allows the use of two carriers at the same time.
  • the transmission chain configuration used for transmission in option 1 is the same as that shown in FIG.
  • the transmission chain configuration used for transmission in option 2 is as shown in FIG.
  • FIG. 6 shows an example of UE Capability reported from the terminal 20 to the base station 10, which is defined in response to Rel-16 1Tx-2Tx switching.
  • FIG. 7 shows an example of CellGroupConfig and ServingCellConfig that are defined in response to Rel-16 1Tx-2 Tx switching and are set from the base station 10 to the terminal 20.
  • uplinkTxSwitchingPeriodLocation-r16 in ServingCellConfig indicates whether UL Tx switching period is set in the target cell (carrier). Examples of operations related to the UL Tx switching period are shown in Figures 8 and 9.
  • FIG. 8 is an example of a case where it is set that a UL Tx switching period occurs in carrier 1.
  • a UL Tx switching period occurs in carrier 1 both when switching from carrier 1 to carrier 2 and when switching from carrier 2 to carrier 1.
  • FIG. 9 is an example of a case where it is set that a UL Tx switching period occurs in carrier 2.
  • the terminal 20 When dynamically switching between two carriers, the terminal 20 is allowed to have a predetermined length of DL communication interruption (DL interruption) in the DL carrier overlapping the UL switching period. . Its length (X OFDM symbols) is defined as shown in FIG.
  • a summary of Rel-16 UL Tx switching is as follows. Based on the PUSCH scheduling (scheduling command, rank adaptation) from the base station 10, the terminal 20 performs "1 port transmission on carrier 1", “1 port transmission on carrier 2", "1 port transmission on carrier 1 + Can dynamically switch between 1-port transmission on carrier 2 (applicable only if inter-band CA supports option 2) and 2-port transmission on carrier 2 (with or without 3dB power boosting) It is.
  • a switching period occurs when the carrier connected to the transmission port switches, and during the switching period, UL transmission is not performed on either carrier. There are also cases where DL interruption occurs during the Switching period.
  • each of the two transmission chains can support two carriers, resulting in 2Tx-2Tx UL Tx switching. Since 2-port transmission is possible even with carrier 1, in addition to case 1 and case 2, case 3 is compared to Rel-16 as a case of the transmission chain and carrier connection pattern, as shown in Figure 11. will be added. Therefore, for the terminal 20 and the base station 10, it is necessary to distinguish between Rel-17 (2Tx-2Tx UL Tx switching) and Rel-16 (1Tx-2Tx).
  • FIG. 12 shows patterns of the number of transmission ports for each case and each option (whether or not simultaneous transmission is possible with two carriers).
  • FIG 13 shows an example of RRC settings in Rel-17.
  • uplinkTxSwitching-2T-Mode-r17 indicates the setting to be in the 2Tx-2Tx UL Tx switching mode
  • uplinkTxSwitching-DualUL-TxState-r17 indicates which case should be switched to during switching, as described above. This is information for setting which case to switch to when there are multiple candidates for the case.
  • the number of bands is two, as shown in Figure 14, but it is supported to use two consecutive carriers in one of the bands. Examples of configurations of transmission ports in each case in the example of FIG. 14 are shown in FIGS. 15 and 16.
  • Rel-16 and Rel-17 explained above may be applied to Rel-18 UL Tx switching.
  • UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2 Tx simultaneous transmission is assumed, but this is just an example.
  • the maximum number of bands within which transmission switching is performed may be greater than four.
  • the number of antenna ports used for transmission may be greater than two. In other words, there may be cases where simultaneous transmission occurs at three or more antenna ports.
  • This embodiment includes a first embodiment and a second embodiment. A basic operation example common to the first embodiment and the second embodiment will be described with reference to FIG. 19.
  • the terminal 20 transmits capability information (Capability) to the base station 10.
  • Capability capability information
  • the base station 10 transmits configuration information (or instruction information) to the terminal 20. Examples of setting information/instruction information will be explained in the second embodiment.
  • the base station 10 determines the settings/instructions for the terminal 20 within the capability of the terminal 20 indicated in the capability information of the terminal 20 received in S101, creates the settings information/instruction information, and executes the instructions in S102. Send.
  • such an assumption is just an example.
  • the terminal 20 that received the setting information/instruction information in S102 operates according to the information.
  • the terminal 20 when the terminal 20 receives the DCI from the base station 10, it switches the band to which the port is connected based on the DCI according to the setting information, and performs transmission using the switched port in S104.
  • the configuration information/instruction information in S102 may be transmitted using any of RRC signaling, MAC CE, and DCI.
  • RRC signaling any of RRC signaling, MAC CE, and DCI.
  • the terminal 20 reports at least one of the plurality of capability information listed below to the base station 10 as a capability that it supports for Rel-18 UL Tx switching. All of the examples listed below are examples of capability information regarding bands.
  • ⁇ Supported band combinations for UL Tx switching e.g. up to 3 or 4 bands
  • ⁇ Number of CCs that can be supported by each band ⁇ Whether a DL carrier (downlink carrier) linked to each band is necessary
  • Terminal 20 receives at least one of the plurality of configuration information/instruction information listed below from base station 10 as configuration information/instruction information for Rel-18 UL Tx switching.
  • the base station 10 transmits to the terminal 20 at least one of the plurality of configuration information/instruction information listed below. All of the examples listed below are examples of information regarding band switching.
  • ⁇ DL/UL serving cell and UL only serving cell (or either DL/UL serving cell or UL only serving cell) including UL used for Rel-18 UL Tx switching -
  • Other serving cells for which switching and/or simultaneous transmission can be instructed in each serving cell ⁇ For each serving cell, for each combination with other serving cells ⁇ whether or not to include a switching period, whether power boosting is allowed, whether simultaneous transmission is allowed, and whether to switch from a specific port configuration to another specific port configuration. Case interpretation when switching is instructed ⁇ - Number of ports subject to band switching - Whether each serving cell is linked to a port subject to band switching (or not subject to band switching)
  • Examples 1 to 9 of the first embodiment can be implemented in combination with any of Examples 1 to 9 of the second embodiment, respectively.
  • the terminal 20 reports at least one of the capability information shown in Examples 1 to 9 below to the base station. Additionally, information that combines any or all of Examples 1 to 9 may be reported.
  • the terminal 20 reports information regarding one or more band combinations (BC) for UL Tx switching supported for Rel-18 UL Tx switching to the base station 10, separately from the BC for UL CA.
  • BC band combinations
  • the band combination (BC) for UL Tx switching to be reported may include BCs that are not compatible with UL CA.
  • Each BC included in one or more band combinations (BC) for UL Tx switching may be information indicating a combination of bands to be switched.
  • the terminal 20 when the terminal 20 reports BC1, BC2, and BC3 as the BC for UL CA, the terminal 20 may report BC4 and BC5 as the band combination (BC) for UL Tx switching.
  • BC1 BC2, and BC3
  • BC4 and BC5 as the band combination (BC) for UL Tx switching.
  • each BC included in one or more band combinations (BC) for UL Tx switching to be reported must be a UL CA compatible BC.
  • Rel-18 has the restriction that when reporting a BC for UL Tx switching, it must support each "band combination" within the BC. good. In this case, for example, when reporting BC of Band A-B-C in Rel-18, it is necessary to also support A-B, A-C, and B-C.
  • Terminal 20 reports information regarding the number of CCs supported in each band of BC for UL Tx switching described in Example 1 to base station 10.
  • the information regarding the number of CCs may be the number of CCs (the number of cells) itself.
  • the band in Example 2 (the band for reporting the number of CCs) may be a band other than the band within the BC reported in Example 1.
  • the upper limit of the number of CCs or the total bandwidth that can be supported in each band in Rel-18 UL Tx switching may be specified in the specifications.
  • the number of CCs that the terminal 20 can support may be defined as "up to 2 consecutive CCs" or "consecutive CCs within the 100 MHz band.”
  • the upper limit of the number of CCs that can be supported or the total bandwidth may be defined not for each band but for each of TDD and FDD.
  • base station 10 configures CC within the band for UL Tx switching for terminal 20 according to these regulations.
  • Example 3 For each band of BC for UL Tx switching described in Example 1, the terminal 20 reports information regarding whether or not a DL carrier associated with that band is necessary to the base station 10. For example, if a certain BC has Band_A, Band_B, and Band_C, then for that BC, ⁇ Band_A: DL carrier required, Band_B: DL carrier not required, Band_C: DL carrier not required , ⁇ . Note that since the terminal 20 basically only needs to be able to perform DL reception on any carrier, a DL carrier may not be necessary in a certain band.
  • the specifications may specify conditions for a UL carrier/band that does not require a linked DL carrier. Conditions include, for example, TDD (or FDD), a specific band, and only when a specific band is included in BC.
  • TDD or FDD
  • the band in Example 3 (the band that reports the necessity of DL carrier) may be a band other than the band within the BC reported in Example 1.
  • Example 4 The terminal 20 reports to the base station 10 information regarding the presence or absence of simultaneous transmission support for each combination of bands to be switched within the BC for UL Tx switching described in Example 1.
  • the terminal 20 reports to the base station 10 information such as that in the BC of bands A-B-C-D, simultaneous transmission is possible for bands A-B (dual UL or both), and simultaneous transmission is not possible for A-C and A-D (switched UL).
  • the terminal 20 requests the base station 10 not for each combination of bands to be switched, but for each band, or for any combination within a BC, or for all Rel-18 UL Tx switching BCs that the terminal 20 supports. Information regarding the presence or absence of simultaneous transmission support may be reported to the sender.
  • the band in Example 4 (the band for which the presence or absence of simultaneous transmission support is reported) may be a band other than the band within the BC reported in Example 1.
  • the terminal 20 reports information regarding the switching period for each combination of bands to be switched within the BC for UL Tx switching described in Example 1.
  • the information regarding the switching period may be the value of the switching period.
  • the terminal 20 reports information to the base station 10 that in BC of bands A-B-C-D, the switching period of band A-B is n35 ⁇ s, and the switching period of A-C and A-D is n140 ⁇ s.
  • the terminal 20 requests the base station 10 not for each combination of bands to be switched, but for each band, or for any combination of the above BCs, or for all Rel-18 UL Tx switching BCs supported by the terminal. may report information regarding the switching period.
  • new switching period candidate values may be defined for Rel-18 UL Tx switching, and some values that could be reported for Rel-16/17 cannot be reported for Rel-18. You can also use it as
  • the band in Example 5 (the band reporting the switching period) may be a band other than the band in BC reported in Example 1.
  • the terminal 20 may report the band in which the DL interruption occurs for each combination of bands to be switched in the BC for UL Tx switching described in Example 1.
  • the terminal 20 reports 0100 for bands A-B, 1010 for A-C, etc. in BC of bands A-B-C-D to the base station 10.
  • This bitmap shows bands A-B-C-D, meaning that DL interruption occurs during switching in the band corresponding to the 1 bit.
  • the terminal 20 requests the base station 10 not for each combination of bands to be switched, but for each band, or for any combination of the above BCs, or for all Rel-18 UL Tx switching BCs supported by the terminal. may report information about the band in which the DL interruption occurs.
  • the specifications may specify whether DL interruption is allowed for each band combination for Rel-18 UL Tx switching or for each combination of two bands within a band combination.
  • the band in Example 6 may be a band other than the band within the BC reported in Example 1.
  • the base station 10 that has received information indicating that DL interruption will occur in a certain band may, for example, perform scheduling assuming that DL interruption will occur when scheduling DL reception in that band. good.
  • the terminal 20 may report information regarding whether or not power boosting is supported for each combination of bands to be switched within the BC for UL Tx switching described in Example 1.
  • the terminal 20 reports information to the base station 10, such as that power boosting is possible in bands A-B and power boosting is not possible in bands A-B-C-D in BC of bands A-B-C-D.
  • power boosting is possible in bands A-B. power
  • being capable of power boosting in bands A-B may mean being able to increase transmission power (output power) when simultaneously transmitting bands A and B.
  • the terminal 20 requests the base station 10 not for each combination of bands to be switched, but for each band, or for any combination within a BC, or for all BCs for Rel-18 UL Tx switching that the terminal supports. You may also report information regarding whether power boosting is supported.
  • the band in Example 7 (the band that reports power boosting availability) may be a band other than the band in BC reported in Example 1.
  • the base station 10 When the base station 10 receives information indicating that power boosting is possible in a certain band, it uses DCI or MAC CE to perform power boosting when scheduling 2-port simultaneous transmission in that band. Transmission power control may be performed on the terminal 20 according to the following.
  • the terminal 20 may report to the base station 10 information regarding the number of ports (eg, 1 or 2) capable of band switching within the BC for UL Tx switching described in Example 1. Furthermore, if there is a port to which the band is fixed, the target band of the port to which the band is fixed may be reported. For example, the terminal 20 reports information such as that port 1 is fixed to band A in BC of band ABCD to the base station 10.
  • the number of ports eg, 1 or 2
  • the target band of the port to which the band is fixed may be reported. For example, the terminal 20 reports information such as that port 1 is fixed to band A in BC of band ABCD to the base station 10.
  • a predetermined number of layers for example, 2 as the number of MIMO layers for that target band, and report a predetermined number of layers as the number of MIMO layers for other bands.
  • the number of layers for example, 2) may not be reported.
  • the band in Example 8 (the target band for which the number of ports capable of band switching is reported) may be a band other than the band within the BC reported in Example 1.
  • the terminal 20 may report information regarding switching candidate bands at each port within the BC for UL Tx switching described in Example 1. For example, the terminal 20 reports information to the base station 10 such as that A and B are switching candidates for port 1 and A, B, C, and D are switching candidates for port 2 in BC of band ABCD. do.
  • the terminal 20 may report to the base station 10 the number of supported ports in each band within the BC (eg, A is 2, B is 2, C is 1, D is 1, etc.).
  • the band (switching candidate band) in Example 9 may be a band other than the band within the BC reported in Example 1.
  • the base station 10 can know the capability related to UL Tx switching of the terminal 20, so it can appropriately perform UL Tx switching. It becomes possible to carry out settings, instructions, or scheduling for.
  • the terminal 20 configures or configures at least one of the following examples 1 to 9 from the base station 10 using one or a combination of RRC signaling, MAC CE, and DCI. be instructed. Further, a combination of any plurality or all of Examples 1 to 9 may be set or instructed from the base station 10 to the terminal 20.
  • the terminal 20 receives from the base station 10 a DL/UL serving cell (a cell having a UL carrier and a DL carrier) that includes UL used for Rel-18 UL Tx switching, or a UL that includes UL used for Rel-18 UL Tx switching. Only serving cell (UL carrier only cell) is set. Even if the terminal 20 is configured with both a DL/UL serving cell that includes UL used for Rel-18 UL Tx switching and a UL only serving cell that includes UL used for Rel-18 UL Tx switching from the base station 10, good.
  • “certain information is set” means that the terminal 20 receives the information from the base station 10.
  • the base station 10 can determine which cell to set for the terminal 20 based on the Capability received from the terminal 20 in the first embodiment. For example, the base station 10 can set the cell (carrier) included in the BC received in Example 1 of the first embodiment as the serving cell in the terminal 20.
  • the base station 10 may set a cell in a band that does not require a DL carrier as a UL only serving cell in the terminal 20 based on the information received in Example 3 of the first embodiment.
  • the serving cell in Examples 2 to 9 below is the cell set in the terminal 20 in Example 1.
  • the present invention is not limited to this, and the serving cell in Examples 2 to 9 below may be a cell other than the cell set in Example 1.
  • the following settings/instructions in Examples 2 to 9 may be performed at the time of cell setting in Example 1, or may be performed at a timing after cell setting in Example 1.
  • Example 2 When the terminal 20 receives a specific IE/parameter from the base station 10 by ServingCellConfig for a certain cell, the specific IE/parameter is set in the terminal 20.
  • the terminal 20 may recognize from the specific IE/parameter received from the base station 10 that the cell includes UL used for Rel-18 UL Tx switching.
  • ServingCellConfig is an example, and other messages or signals may be used.
  • the terminal 20 may recognize that the cell is a UL only serving cell used for Rel-18 UL Tx switching by having a specific IE/parameter set by the ServingCellConfig for a certain cell from the base station 10. .
  • the terminal 20 recognizes from the base station 10 that the cell is a UL only serving cell used for Rel-18 UL Tx switching because a specific IE/parameter is not set in the ServingCellConfig for that cell, good.
  • ServingCellConfig is an example, and other messages or signals may be used.
  • the terminal 20 is configured with information regarding other serving cells for which switching and/or simultaneous transmission can be instructed in each serving cell from the base station 10. For example, assume that ServingCellConfig includes information on other serving cells for which switching/simultaneous transmission can be instructed.
  • the terminal 20 receives an RRC message for cell A (e.g. ServingCellConfig) and detects that cell B exists in the RRC message as another serving cell for which switching/simultaneous transmission can be instructed, cell A Assume that switching/simultaneous transmission with cell B and cell B can be instructed.
  • RRC message for cell A e.g. ServingCellConfig
  • the terminal 20 may be set with information from the base station 10 regarding whether each serving cell includes a switching period for each combination with another serving cell. Alternatively, information regarding whether a switching period is included may be set for each serving cell or for each cell group, rather than for each combination with other serving cells.
  • a certain RRC message (eg ServingCellConfig, CellGroupConfig) includes information regarding whether or not a switching period is included.
  • RRC message eg ServingCellConfig, CellGroupConfig
  • terminal 20 receives an RRC message for cell A and detects information in the RRC message that means that "a switching period exists in cell B when switching between cell A and cell B.” .
  • the terminal 20 receives UL scheduling information that causes switching between cell A and cell B, it performs switching in the switching period on the cell B side.
  • a certain RRC message e.g. ServingCellConfig, CellGroupConfig
  • the terminal 20 receives the RRC message, and the RRC message includes a message that states, "When switching between cell A and cell B, power boosting may be performed when two ports transmit simultaneously in cell A.”
  • the terminal 20 performs power boosting when receiving UL scheduling information that causes simultaneous two-port transmission in cell A due to switching from cell B to cell A, for example.
  • the terminal 20 is set with information from the base station 10 regarding whether or not each serving cell may perform simultaneous transmission for each combination with other serving cells. Alternatively, information regarding whether simultaneous transmission may be performed per serving cell or per cell group may be set, rather than per combination with other serving cells.
  • information regarding whether simultaneous transmission may be performed per serving cell or per cell group may be set, rather than per combination with other serving cells.
  • the settings for each serving cell for example, if "simultaneous transmission OK" is set in the settings for cell A, it means that simultaneous transmission is OK with any cell as long as it is combined with cell A. It can mean something.
  • a certain RRC message e.g. ServingCellConfig, CellGroupConfig
  • a certain RRC message contains information regarding whether simultaneous transmission is allowed.
  • the terminal 20 receives an RRC message for cell A and detects in the RRC message information indicating that "simultaneous transmission is possible in cell A and cell B."
  • the terminal 20 receives UL scheduling information that is simultaneously transmitted in cell A and cell B.
  • base station 10 can perform UL scheduling for terminal 20 that causes simultaneous transmission in cell A and cell B.
  • the terminal 20 is configured with information regarding case interpretation when each serving cell is instructed by the base station 10 to switch from a specific port configuration to another specific port configuration for each combination with other serving cells. Good too. Alternatively, information regarding case interpretation may be set when switching from a specific port configuration to another specific port configuration is instructed not for each combination with other serving cells but for each serving cell or cell group. .
  • a certain RRC message e.g. ServingCellConfig, CellGroupConfig
  • a certain RRC message contains information regarding case interpretation.
  • the terminal 20 receives the above RRC message, and in the RRC message there is a message that states, ⁇ From a certain Tx chain state (a certain case number) to another Tx chain state (another case number) after UL Tx switching. ), if the case number of the transition destination is not uniquely determined, if it is detected that it contains "information for uniquely determining the transition destination case number", the UL Tx Determine the transition destination Tx chain (port configuration) after switching.
  • the above “information for determining” may be an explicit “pair of case number before transition and case number of transition destination", or it may indicate that "two ports are connected to one carrier" It may be information or information indicating that "one port is connected to one carrier”.
  • the terminal 20 is set as the above explicit information such that "If the terminal is in case 2 before the transition and there are cases 1 and 3 as candidates for transition, transition to case 3." At this time, in case 2, the terminal 20 switches to case 3 if scheduling corresponding to 1P+0P+0P+0P is performed by the DCI.
  • the base station 10 can perform subsequent scheduling assuming the above transition destination.
  • the terminal 20 is set with information regarding the number of ports subject to band switching for each cell group from the base station 10. In addition to this, or instead of this, the terminal 20 may be set with information from the base station 10 regarding whether each serving cell is associated with a port to which band switching is to be performed. Furthermore, the terminal 20 may be set with information from the base station 10 regarding whether each serving cell is associated with a port that is not subject to band switching.
  • the information regarding whether or not the serving cell is linked to the port to which the band is to be switched is an example of the information regarding the antenna port to which the band is to be switched.
  • Information regarding whether serving cell is linked to a port not subject to band switching is an example of information regarding an antenna port not subject to band switching.
  • the terminal 20 receives information corresponding to "Cell A and cell B are subject to port 1 switching, and cell C permanently uses port 2" from the base station 10 via an RRC message. Then, it is assumed that scheduling is performed corresponding to "transmission is performed in cell A or cell B using port 1, and transmission is performed in port 2 in cell C". Furthermore, the base station 10 can perform scheduling for the terminal 20 that corresponds to "transmitting in cell A or cell B using port 1, and transmitting in cell C using port 2.”
  • the base station 10 can perform settings/instructions to the terminal 20 according to the capability related to UL Tx switching. It becomes possible to appropriately implement switching.
  • Alt.1 is a method of dynamically switching bands between 3 or 4 bands based on UL scheduling (DCI).
  • DCI UL scheduling
  • Alt.2 notifies 2 of 3 or 4 bands by MAC CE or DCI from the NW, and then uses UL scheduling (DCI) between the notified 2 bands, similar to Rel-17. This method dynamically switches bands.
  • Alt.3 sets one band out of 3 or 4 bands as the anchor band, and dynamically switches the band based on UL scheduling (DCI) only between the anchor band and non-anchor band. This is an acceptable method. That is, Alt.3 does not allow dynamic band switching between non-anchor bands.
  • DCI UL scheduling
  • the number of bands used for UL transmission is 3 or 4
  • the number of switching cases that is, the number of states that are candidates for switching
  • the number of switching cases is 10.
  • uplink transmission (UL transmission) is performed using N bands (N is a natural number equal to or less than M), which are selected from M (M is a natural number equal to or greater than 3) bands.
  • M may be 3 or 4 similarly to Rel-18. However, M may be 5 or more.
  • N may be 1 or 2 as in Rel-18. However, N may be 3 or more.
  • UL transmission may be read as PUSCH transmission.
  • a band is reserved for switching the band used for UL transmission from one or more first bands (hereinafter referred to as 1st band(s)) to one or more second bands (hereinafter referred to as 2nd band(s)).
  • the specific time may be referred to as a minimum scheduling offset.
  • 1 st band(s) may be referred to as 1 st Tx chain(s) or 1 st BC (Band Combination)
  • 2 nd band(s) may be referred to as 2 nd Tx chain(s) or 2 nd BC. may be called.
  • Alt.1 described above is adopted.
  • the Minimum scheduling offset may be counted by a specific timer.
  • the minimum scheduling offset may be expressed by a number (eg, X symbols) of unit time (eg, symbols).
  • the minimum scheduling offset may be expressed in absolute time (eg, ⁇ sec).
  • the subcarrier spacing used to determine the symbol length may be specified. For example, the symbol length may always be determined based on a specific subcarrier spacing, or UL Tx switching The symbol length may be determined based on either or both of the subcarrier intervals used in the switching source band and switching destination band.
  • the start timing of the Minimum scheduling offset (that is, the activation timing of a specific timer) may be the reception timing of the DCI that schedules UL transmission using the 2nd band(s), for example, the timing of receiving the PDCCH resource including the DCI.
  • the timing may be the end timing or the timing when a predetermined processing time has elapsed from the end timing of the PDCCH resource.
  • the start timing of the Minimum scheduling offset may be the later of the DCI reception timing described above and the timing at which PUSCH transmission in the switching source band is completed.
  • the reception timing of the DCI may be the last symbol in which the DCI is received, or the last symbol of the slot in which the DCI is received.
  • the end timing of the PDCCH resource may be the last symbol in which the PDCCH is received, or may be the last symbol in the slot in which the PDCCH is received. Also, if the end timing of the Minimum scheduling offset is the start timing of UL transmission using 2nd band(s) (e.g. PUSCH) or Switching for UL transmission using 2nd band(s) (e.g. PUSCH), It may be specified that it is not assumed that the timing will be later than the start timing of the period, or it may be specified that UL transmission is not assumed to be performed in such a case.
  • the start timing of UL transmission may be the first symbol scheduled for UL transmission, or may be the first symbol of a slot scheduled for UL transmission.
  • Bands A, B, and C are set as bands that can be used for UL transmission
  • UL Tx Switching from Bands A, B ( 1st bands) to Bands B, C ( 2nd bands) An example is given below.
  • the minimum scheduling offset is secured between the DCI C reception timing or the end of PUSCH transmission in the switching source band and the start timing of Band C PUSCH or the start timing of the switching period for that purpose. It may be considered that the minimum time required for In other words, when receiving DCI C, the terminal 20 does not expect to transmit a Band C PUSCH before the Minimum scheduling offset has elapsed, but instead assumes to transmit a Band C PUSCH after the Minimum scheduling offset has elapsed. do. In other words, when receiving DCI C, the terminal 20 does not assume scheduling of PUSCH transmission in Band C for the timing before the Minimum scheduling offset has elapsed, but at the timing after the Minimum scheduling offset has elapsed. Assume scheduling of PUSCH transmission in Band C.
  • the UL Tx switching period (switching period in FIG. 20) may be included in Band A or Band C, as explained in FIGS. 8 and 9.
  • Minimum scheduling offset may be considered a concept that includes UL Tx switching period.
  • the Minimum scheduling offset is set taking into consideration the UL Tx switching period, and a case where it is larger than the UL Tx switching period may be assumed. In such a case, the terminal 20 may assume that the Band C PUSCH is transmitted after the Minimum scheduling offset has elapsed.
  • Minimum scheduling offset may be considered a concept that does not include UL Tx switching period.
  • the Minimum scheduling offset may be set without considering the UL Tx switching period.
  • Minimum scheduling offset and UL Tx switching period may include overlapping times. It may be specified that the start timing of the UL Tx switching period is assumed to be after the expiration timing of the Minimum scheduling offset.
  • the terminal 20 may expect to transmit the Band C PUSCH after the later of either the Minimum scheduling offset or the UL Tx switching period has elapsed.
  • the base station 10 may assume scheduling such that the Band C PUSCH is transmitted after the later of either the Minimum scheduling offset or the UL Tx switching period has elapsed.
  • Example 1 In example 1, the terminal 20 reports capability information (UE Capability) regarding Minimum scheduling offset to the base station 10 (NW). The following options are possible for UE Capability.
  • UE Capability capability information regarding Minimum scheduling offset to the base station 10 (NW).
  • NW base station 10
  • the UE Capability may include an information element (hereinafter referred to as the first information element) indicating whether Minimum scheduling offset is required.
  • the UE Capability may include an information element (hereinafter referred to as a second information element) indicating the value of Minimum scheduling offset.
  • the first information element or the second information element is commonly reported for the entire band that can be used for UL transmission (M bands), i.e., the band combination that configures UL Tx switching. may be done.
  • the first information element or the second information element may be reported every 1 st band(s) before UL Tx Switching, and some bands included in the 1 st band(s) ( may be reported for each serving cell).
  • the 1st band(s) or some bands included in the 1st band(s) are an example of one or more specific bands.
  • the first information element or the second information element may be reported for every 2nd band(s) after UL Tx Switching, and some bands included in the 2nd band(s) ( may be reported for each serving cell).
  • the 2nd band(s) or some bands included in the 2nd band(s) are an example of one or more specific bands.
  • the first information element or the second information element may be reported for each combination of 1st band(s) and 2nd band(s) and is included in 1st band(s). It may be reported for each combination of some bands (serving cells) and some bands (serving cells) included in the 2nd band(s).
  • a combination is an example of one or more specific bands.
  • the first information element or the second information element may be reported separately depending on whether simultaneous transmission is allowed on multiple carriers. For example, if simultaneous transmission is not allowed on multiple carriers, the first information element may be an information element indicating that Minimum scheduling offset is not required, and the second information element may be an information element indicating that the value of Minimum scheduling offset is It may be an information element that indicates zero or an information element that indicates a smaller value than when simultaneous transmission is permitted on multiple carriers. If simultaneous transmission is allowed on multiple carriers, the first information element may be an information element indicating that a Minimum scheduling offset is required, and the second information element may be an information element indicating that a Minimum scheduling offset (zero) is required. The information element may also be an information element that indicates a value larger than that of a case where simultaneous transmission is not permitted on multiple carriers.
  • Option 1 may be referred to as switched UL.
  • Option 2 simultaneous transmission across up to 2 carriers.
  • Option 2 may be referred to as dual UL.
  • the second information element may be different depending on whether the UL transmission involves UL Tx Switching or not.
  • the value of Minimum scheduling offset corresponding to the case with UL Tx Switching may be larger than the value of Minimum scheduling offset corresponding to the case without UL Tx Switching.
  • the value of Minimum scheduling offset for cases without UL Tx Switching may be zero. It may be considered that the Minimum scheduling offset does not apply in cases that do not involve UL Tx Switching.
  • the second information element may be different depending on whether the 2nd band(s) is different from the 1st band(s).
  • the value of Minimum scheduling offset corresponding to the case where 2nd band(s) is different from 1st band(s) is the value of Minimum scheduling offset corresponding to the case where 2nd band(s) is the same as 1st band(s). May be larger than the scheduling offset value.
  • the second information element may be different depending on the number of Tx chains in which UL Tx Switching occurs.
  • the number of Tx chains in which UL Tx Switching occurs may be considered to be the number of bands included in the 2nd band(s) that are different from the 1st band(s).
  • the value of Minimum scheduling offset may be increased as the number of Tx chains in which UL Tx Switching occurs increases.
  • the UE Capability may include information elements that are commonly defined for M bands. As explained in Options 1-4 to 1-6, UE Capability may include information elements that are individually defined for one or more specific bands included in the 1st band(s) and 2nd band(s). .
  • the terminal 20 may control UL transmission assuming a specific time (Minimum scheduling offset).
  • the value of the specific time may be a value reported by the UE Capability.
  • the base station 10 may schedule UL transmission assuming a specific time (Minimum scheduling offset).
  • the value of the specific time may be determined according to the value reported by the UE Capability.
  • the value of Minimum scheduling offset may be set from base station 10 (NW) to terminal 20 by an RRC message, and may be notified from base station 10 (NW) to terminal 20 by MAC CE or DCI. .
  • the following options are possible as the Minimum scheduling offset value to be set or notified.
  • the value of Minimum scheduling offset may be set or notified according to the UE Capability.
  • UE Capability may include information elements related to at least one of options 1-1 to 1-10.
  • the value of Minimum scheduling offset that is set or notified may be greater than or equal to the value supported by the terminal 20.
  • the value of Minimum scheduling offset may be set or notified in common across all bands (serving cells) that can be used for UL transmission, similar to option 1-3.
  • the value of Minimum scheduling offset may be set or notified every 1st band(s) before UL Tx Switching, and is included in 1st band(s), similar to option 1-4. It may be set or notified for each serving cell.
  • the 1st band(s) or some bands included in the 1st band(s) are an example of one or more specific bands.
  • the value of Minimum scheduling offset may be set or notified for each 2nd band(s) after UL Tx Switching, similar to option 1-5. It may be set or notified for each serving cell.
  • the 2nd band(s) or some bands included in the 2nd band(s) are an example of one or more specific bands.
  • the value of Minimum scheduling offset may be set or notified for each combination of 1st band(s) and 2nd band(s), similar to option 1-6 . It may be set or notified for each combination of some bands (serving cells) included in (s) and some bands (serving cells) included in 2nd band (s). A combination is an example of one or more specific bands.
  • the value of Minimum scheduling offset may be set or notified depending on whether simultaneous transmission is allowed on multiple carriers, similar to option 1-7.
  • the value of Minimum scheduling offset may be set or notified depending on whether the UL transmission is accompanied by UL Tx Switching, similar to option 1-8.
  • the value of Minimum scheduling offset may be set or notified depending on whether the 2 nd bands are different from the 1 st bands, similar to option 1-9.
  • the value of Minimum scheduling offset may be set or notified according to the number of Tx chains in which UL Tx Switching occurs, similar to option 1-10.
  • the terminal 20 may receive information that sets or notifies a specific time that is commonly determined for M bands.
  • UE Capability is the ability to set or notify specific times that are individually determined for one or more specific bands included in 1st band(s) and 2nd band(s). You may also receive information that
  • the terminal 20 may control UL transmission assuming a specific time (Minimum scheduling offset).
  • the value of the specific time (Minimum scheduling offset) may be set or notified by the base station 10 (NW).
  • the base station 10 may schedule UL transmission assuming a specific time (Minimum scheduling offset).
  • the value of the specific time (Minimum scheduling offset) may be set or notified by the base station 10 (NW).
  • the value of Minimum scheduling offset may be predefined in the wireless communication system.
  • the value of Minimum scheduling offset may be defined in the same manner as one or more options selected from options 1-3 to 1-10 described above.
  • the terminal 20 may control UL transmission assuming a specific time (Minimum scheduling offset).
  • the value of the specific time (Minimum scheduling offset) may be predefined in the wireless communication system.
  • the base station 10 may schedule UL transmission assuming a specific time (Minimum scheduling offset).
  • the value of the specific time (Minimum scheduling offset) may be predefined in the wireless communication system.
  • the specific time is the Minimum scheduling offset.
  • the third embodiment is not limited to this.
  • the specific time may have another name and may be defined as a time different from the Minimum scheduling offset.
  • Switching preparation time may be considered to be the time for rewriting information regarding the 1st band(s) to information regarding the 2nd band(s) in the memory.
  • the Switching preparation time may be counted by a specific timer, similar to the Minimum scheduling offset.
  • Switching preparation time may be expressed by a number (eg, X symbols) of unit time (eg, symbols).
  • Switching preparation time may be expressed in absolute time (for example, ⁇ sec).
  • the start timing of Switching preparation time (that is, the activation timing of a specific timer) may be the timing (first timing) when UL transmission of 1 st band(s) is completed, and the UL transmission of 1 st band(s) It may be at the beginning of the slot (second timing) immediately after the timing when the UL transmission is completed, or it may be at the reception timing (third timing) of the DCI that schedules UL transmission using the 2nd band(s).
  • the timing may be a timing (fourth timing) when a certain processing time has elapsed from the third timing.
  • the start timing of Switching preparation time is the timing related to UL transmission of 1st band(s) (first timing or second timing) and the timing related to DCI scheduling UL transmission using 2nd band(s) (third timing). or fourth timing), whichever is later.
  • the timing at which UL transmission of 1st band(s) is completed is the timing at which UL transmission of the band to be rewritten is completed, which is a different band between 1st band(s) and 2nd band(s). It may be considered that However, the timing at which UL transmission of the 1st band(s) is completed may be considered to be the timing at which UL transmission of all bands included in the 1st band(s) is completed.
  • Bands A, B, C, and D are set as bands that can be used for UL transmission
  • UL transmission from Bands A, B ( 1st bands) to Bands C, D ( 2nd bands) An example of Tx Switching will be given.
  • the Switching preparation time can be considered to be the minimum time that should be secured between the completion timing of PUSCH for Bands A and B and the start timing of PUSCH for Bands C and D.
  • the start timing of PUSCH in Bands C, D may be the first symbol in which PUSCH is scheduled, or may be the first symbol in the slot in which PUSCH is scheduled. That is, the terminal 20 may not assume transmission of Band C, D PUSCH before Switching preparation time has elapsed, but may assume transmission of Band C, D PUSCH after Switching preparation time has elapsed. In other words, the terminal 20 may not assume the scheduling of Band C, D PUSCH before the Switching preparation time has elapsed, but may assume the scheduling of Band C, D PUSCH after the Switching preparation time has elapsed. .
  • Switching preparation time may be considered to be a concept that includes UL Tx switching period, or may be considered to be a concept that does not include UL Tx switching period.
  • Switching preparation time may be determined in the same way as the value of Minimum scheduling offset.
  • Minimum scheduling offset may be replaced with Switching preparation time.
  • the start timing of Minimum scheduling offset or Switching preparation time is the reception timing of MAC CE or DCI that notifies 2 bands from 3 or 4 bands, and PUSCH transmission to the newly notified band by MAC CE or DCI. It may be specified that the transmission timing of the DCI that issues the instruction is not assumed to be before the expiration timing of the Minimum scheduling offset or Switching preparation time. That is, the Minimum scheduling offset or Switching preparation time in the third embodiment may be read as above and applied to Alt.2.
  • the band used in UL transmission is a band selected from M (M is a natural number of 3 or more) bands and uses N (N is a natural number of M or less) bands.
  • a specific time (Minimum scheduling offset or Switching preparation time) is defined as the minimum time for switching from 1st band(s) to 2nd band(s).
  • the terminal 20 reports UE Capability regarding a specific time (Minimum scheduling offset or Switching preparation time) to the base station 10 (NW). According to such a configuration, the specific time can be appropriately determined.
  • the terminal 20 performs UL transmission assuming a specific time (Minimum scheduling offset or Switching preparation time).
  • the base station 10 performs UL transmission scheduling assuming a specific time (Minimum scheduling offset or Switching preparation time). According to such a configuration, UL transmission can be appropriately performed.
  • FIG. 22 is a diagram showing an example of the functional configuration of the base station 10.
  • base station 10 includes a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140.
  • the functional configuration shown in FIG. 22 is only an example. As long as the operations according to the embodiments of the present invention can be executed, the functional divisions and functional parts may have any names. Further, the transmitting section 110 and the receiving section 120 may be collectively referred to as a communication section.
  • the transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information on a higher layer from the received signals.
  • the transmitter 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DCI using PDCCH, data using PDSCH, etc. to terminal 20.
  • the setting unit 130 stores preset setting information and various setting information to be sent to the terminal 20 in a storage device included in the setting unit 130, and reads them from the storage device as necessary.
  • the control unit 140 schedules DL reception or UL transmission of the terminal 20 via the transmission unit 110. Furthermore, the control unit 140 includes a function to perform LBT. A functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110, and a functional unit related to signal reception in control unit 140 may be included in receiving unit 120. Further, the transmitting section 110 may be called a transmitter, and the receiving section 120 may be called a receiver.
  • FIG. 23 is a diagram showing an example of the functional configuration of the terminal 20.
  • the terminal 20 includes a transmitting section 210, a receiving section 220, a setting section 230, and a control section 240.
  • the functional configuration shown in FIG. 23 is only an example. As long as the operations according to the embodiments of the present invention can be executed, the functional divisions and functional parts may have any names.
  • the transmitting section 210 and the receiving section 220 may be collectively referred to as a communication section.
  • the transmitter 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and obtains higher layer signals from the received physical layer signals. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, DCI by PDCCH, data by PDSCH, etc. transmitted from the base station 10. Also, for example, the transmitting unit 210 transmits a PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) to the other terminal 20 as D2D communication. etc., and the receiving unit 220 may receive PSCCH, PSSCH, PSDCH, PSBCH, etc. from other terminals 20. Furthermore, the transmitter 210 includes the antenna port described in this embodiment.
  • the setting unit 230 stores various types of setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device included in the setting unit 230, and reads it from the storage device as necessary.
  • the setting unit 230 also stores setting information that is set in advance.
  • the control unit 240 controls the terminal 20.
  • a functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and a functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220.
  • the transmitter 210 may be called a transmitter, and the receiver 220 may be called a receiver.
  • the present embodiment provides at least the following terminal, base station, and communication method.
  • the first feature is that the transmission unit performs uplink transmission using N (N is a natural number of M or less) bands selected from M (M is a natural number of 3 or more) bands. and a control unit that reports capability information regarding a specific time that should be secured in order to switch the band used in the uplink transmission from the first band to the second band.
  • a second feature is that in the first feature, the capability information includes an information element indicating whether or not the specific time is required.
  • a third feature is that in the first feature or the second feature, the capability information of the terminal includes an information element indicating a value of the specific time.
  • a fourth feature is that in at least one of the first to third features, the capability information includes an information element commonly defined for the M bands, or A terminal that includes information elements individually defined for one or more specific bands included in the second band.
  • the fifth feature is that the receiving unit performs uplink reception using N bands (N is a natural number less than or equal to M), which are selected from M (M is a natural number greater than or equal to 3) bands. , a control unit that assumes reporting of capability information regarding a specific time that should be secured in order to switch the band used in the uplink transmission from the first band to the second band.
  • the sixth feature is a step of performing uplink transmission using N (N is a natural number of M or less) bands selected from M (M is a natural number of 3 or more) bands;
  • a communication method comprising the step of reporting capability information regarding a specific time to be secured in order to switch a band used in the uplink transmission from a first band to a second band.
  • the first feature is that the transmission unit performs uplink transmission using N (N is a natural number of M or less) bands selected from M (M is a natural number of 3 or more) bands. , a control unit that controls the uplink transmission by at least assuming a specific time that should be secured in order to switch the band used in the uplink transmission from a first band to a second band.
  • a second feature is a terminal, which is the first feature, and includes a receiving unit that receives information for setting or notifying the specific time.
  • a third feature is that in the second feature, the receiving unit is a terminal that receives information for setting or notifying the specific time that is commonly determined for the M bands.
  • a fourth feature is that in the second feature, the receiving unit receives information for setting or notifying the specific time that is individually determined for one or more specific bands included in the first band and the second band. It is a terminal.
  • the fifth feature is that the receiving unit performs uplink reception using N bands (N is a natural number less than or equal to M), which are selected from M (M is a natural number greater than or equal to 3) bands. , a control unit that schedules the uplink transmission by at least assuming a specific time that should be secured in order to switch the band used in the uplink transmission from a first band to a second band.
  • the sixth feature is a step of performing uplink transmission using N (N is a natural number of M or less) bands selected from M (M is a natural number of 3 or more) bands;
  • the communication method comprises the step of controlling the uplink transmission by at least assuming a specific time that should be secured in order to switch the band used in the uplink transmission from a first band to a second band.
  • each functional block may be realized using one physically or logically coupled device, or may be realized using two or more physically or logically separated devices directly or indirectly (e.g. , wired, wireless, etc.) and may be realized using a plurality of these devices.
  • the functional block may be realized by combining software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, These include, but are not limited to, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning. I can't.
  • a functional block (configuration unit) that performs transmission is called a transmitting unit or a transmitter. In either case, as described above, the implementation method is not particularly limited.
  • the base station 10, terminal 20, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 24 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure.
  • the base station 10 and terminal 20 described above are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc. Good too.
  • the word “apparatus” can be read as a circuit, a device, a unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured not to include some of the devices.
  • Each function in the base station 10 and the terminal 20 is performed by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls communication by the communication device 1004. This is realized by controlling at least one of reading and writing data in the storage device 1002 and the auxiliary storage device 1003.
  • the processor 1001 for example, operates an operating system to control the entire computer.
  • the processor 1001 may be configured with a central processing unit (CPU) that includes interfaces with peripheral devices, a control device, an arithmetic unit, registers, and the like.
  • CPU central processing unit
  • control unit 140, control unit 240, etc. may be realized by the processor 1001.
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes in accordance with these.
  • programs program codes
  • the control unit 140 of the base station 10 shown in FIG. 22 may be realized by a control program stored in the storage device 1002 and operated on the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 23 may be realized by a control program stored in the storage device 1002 and operated on the processor 1001.
  • Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunications line.
  • the storage device 1002 is a computer-readable recording medium, such as at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured.
  • the storage device 1002 may be called a register, cache, main memory, or the like.
  • the storage device 1002 can store executable programs (program codes), software modules, and the like to implement the communication method according to an embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray disk, etc.). -ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, etc.
  • the above-mentioned storage medium may be, for example, a database including at least one of the storage device 1002 and the auxiliary storage device 1003, a server, or other suitable medium.
  • the communication device 1004 is hardware (transmission/reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, network controller, network card, communication module, etc.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.
  • FDD frequency division duplex
  • TDD time division duplex
  • the transmitter/receiver may be physically or logically separated into a transmitter and a receiver.
  • the input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses for each device.
  • the base station 10 and the terminal 20 are equipped with hardware such as a microprocessor, digital signal processor (DSP), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and F PGA (Field Programmable Gate Array). It may be configured to include hardware, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardwares.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • F PGA Field Programmable Gate Array
  • FIG. 25 shows an example of the configuration of vehicle 2001.
  • the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, a front wheel 2007, a rear wheel 2008, an axle 2009, an electronic control unit 2010, and various sensors 2021 to 2029. , an information service section 2012 and a communication module 2013.
  • Each aspect/embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, may be applied to communication module 2013.
  • the functions of the terminal 20 may be installed in the communication module 2013.
  • the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
  • the steering unit 2003 includes at least a steering wheel (also referred to as a steering wheel), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
  • the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and communication port (IO port) 2033. Signals from various sensors 2021 to 2029 provided in the vehicle 2001 are input to the electronic control unit 2010.
  • the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
  • Signals from various sensors 2021 to 2029 include current signals from current sensor 2021 that senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, and front wheel rotation speed signals obtained by air pressure sensor 2023. and rear wheel air pressure signal, vehicle speed signal acquired by vehicle speed sensor 2024, acceleration signal acquired by acceleration sensor 2025, accelerator pedal depression amount signal acquired by accelerator pedal sensor 2029, and brake pedal sensor 2026. These include a brake pedal depression amount signal, a shift lever operation signal acquired by the shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028.
  • the Information Services Department 2012 provides various devices such as car navigation systems, audio systems, speakers, televisions, and radios that provide various information such as driving information, traffic information, and entertainment information, as well as one or more devices that control these devices. It consists of an ECU.
  • the information service unit 2012 provides various multimedia information and multimedia services to the occupants of the vehicle 2001 using information acquired from an external device via the communication module 2013 and the like.
  • the driving support system unit 2030 includes millimeter wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g. GNSS, etc.), map information (e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.) ), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors that prevent accidents and reduce the driver's driving burden. It consists of various devices that provide functions for the purpose and one or more ECUs that control these devices. Further, the driving support system unit 2030 transmits and receives various information via the communication module 2013, and realizes a driving support function or an automatic driving function.
  • GPS Light Detection and Ranging
  • map information e.g. high definition (HD) maps, autonomous vehicle (AV) maps, etc.
  • gyro systems e.g., IMU (Inertial Measurement Unit), INS (Iner
  • Communication module 2013 can communicate with microprocessor 2031 and components of vehicle 2001 via a communication port.
  • the communication module 2013 communicates with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, electronic Data is transmitted and received between the microprocessor 2031, memory (ROM, RAM) 2032, and sensors 2021 to 29 in the control unit 2010.
  • the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, various information is transmitted and received with an external device via wireless communication.
  • Communication module 2013 may be located either inside or outside electronic control unit 2010.
  • the external device may be, for example, a base station, a mobile station, or the like.
  • the communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
  • the communication module 2013 also receives the front wheel and rear wheel rotational speed signals acquired by the rotational speed sensor 2022, the front wheel and rear wheel air pressure signals acquired by the air pressure sensor 2023, and the vehicle speed sensor, which are input to the electronic control unit 2010.
  • the shift lever operation signal acquired by the sensor 2027, the detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028 are also transmitted to the external device via wireless communication.
  • the communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from external devices, and displays it on the information service section 2012 provided in the vehicle 2001.
  • Communication module 2013 also stores various information received from external devices into memory 2032 that can be used by microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 controls the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheel 2007, rear wheel 2008, and axle 2009 provided in the vehicle 2001. , sensors 2021 to 2029, etc. may be controlled.
  • the operations of a plurality of functional sections may be physically performed by one component, or the operations of one functional section may be physically performed by a plurality of components.
  • the order of processing may be changed as long as there is no contradiction.
  • Software operated by a processor included in base station 10 according to an embodiment of the present invention and software operated by a processor included in terminal 20 according to an embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.
  • information notification is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
  • information notification can be performed through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling). , broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.
  • RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • FRA Full Radio
  • W-CDMA registered trademark
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB Universal Mobile Broadband
  • IEEE802.11 Wi-Fi (registered trademark)
  • IEEE802.16 WiMAX (registered trademark)
  • IEEE802.20 UWB (Ultra-WideBand
  • Bluetooth registered trademark
  • the base station 10 may be performed by its upper node in some cases.
  • various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 (for example, it is clear that this can be carried out by at least one of the following: MM E or S-GW, etc. (conceivable, but not limited to).
  • MM E or S-GW etc.
  • there is one network node other than the base station 10 but the other network node may be a combination of multiple other network nodes (for example, MME and S-GW). .
  • the information, signals, etc. described in this disclosure can be output from an upper layer (or lower layer) to a lower layer (or upper layer). It may be input/output via multiple network nodes.
  • the input/output information may be stored in a specific location (for example, memory) or may be managed using a management table. Information etc. that are input/output may be overwritten, updated, or additionally written. The output information etc. may be deleted. The input information etc. may be transmitted to other devices.
  • the determination in the present disclosure may be made based on a value expressed by 1 bit (0 or 1), a truth value (Boolean: true or false), or a comparison of numerical values (e.g. , comparison with a predetermined value).
  • Software includes instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name. , should be broadly construed to mean an application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc.
  • software, instructions, information, etc. may be sent and received via a transmission medium.
  • a transmission medium such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
  • wireless technology such as infrared, microwave
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may also be represented by a combination.
  • At least one of the channel and the symbol may be a signal.
  • the signal may be a message.
  • a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
  • system and “network” are used interchangeably.
  • radio resources may be indicated by an index.
  • base station BS
  • wireless base station base station
  • base station fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • a base station can accommodate one or more (eg, three) cells.
  • the overall coverage area of the base station can be partitioned into multiple smaller areas, each of which is divided into multiple smaller areas by a base station subsystem (e.g., a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head).
  • a base station subsystem e.g., a small indoor base station (RRH: Communication services can also be provided by Remote Radio Head).
  • RRH small indoor base station
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and/or base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • a mobile station is defined by a person skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client or some other suitable terminology.
  • At least one of a base station and a mobile station may be called a transmitting device, a receiving device, a communication device, etc.
  • the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like.
  • the moving object may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving object (for example, a drone, a self-driving car, etc.), or a robot (manned or unmanned). ).
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be replaced by a terminal.
  • a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals 20 for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.)
  • the terminal 20 may have the functions that the base station 10 described above has.
  • words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
  • uplink channels, downlink channels, etc. may be replaced with side channels.
  • a terminal in the present disclosure may be replaced by a base station.
  • a configuration may be adopted in which the base station has the functions that the above-described terminal has.
  • determining may encompass a wide variety of operations.
  • “Judgment” and “decision” include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry ( For example, it may include searching in a table, database, or other data structure), and regarding confirmation as a “judgment” or “decision.”
  • judgment and “decision” refer to receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and access.
  • (accessing) may include considering something as a “judgment” or “decision.”
  • judgment and “decision” refer to resolving, selecting, choosing, establishing, comparing, etc. as “judgment” and “decision”. may be included.
  • judgment and “decision” may include regarding some action as having been “judged” or “determined.”
  • judgment (decision) may be read as "assuming", “expecting", “considering”, etc.
  • connection means any connection or coupling, direct or indirect, between two or more elements and “coupled” with each other.
  • the term “connected” or “coupled” may include the presence of one or more intermediate elements between two elements.
  • the bonds or connections between elements may be physical, logical, or a combination thereof.
  • connection may be replaced with "access.”
  • two elements include one or more electrical wires, cables, and/or printed electrical connections, as well as in the radio frequency domain, as some non-limiting and non-inclusive examples. , electromagnetic energy having wavelengths in the microwave and optical (both visible and non-visible) ranges.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applied standard.
  • RS Reference Signal
  • the phrase “based on” does not mean “based solely on” unless explicitly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using the designations "first,” “second,” etc. does not generally limit the amount or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to a first and second element does not imply that only two elements may be employed or that the first element must precede the second element in any way.
  • a radio frame may be composed of one or more frames in the time domain. Each frame or frames in the time domain may be called a subframe. A subframe may also be composed of one or more slots in the time domain. A subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter applied to the transmission and/or reception of a certain signal or channel. Numerology includes, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transceiver It may also indicate at least one of a specific filtering process that the transmitter/receiver performs in the frequency domain, a specific windowing process that the transceiver performs in the time domain, etc.
  • SCS subcarrier spacing
  • TTI transmission time interval
  • transceiver It may also indicate at least one of a specific filtering process that the transmitter/receiver performs in the frequency domain, a specific windowing process that the transceiver performs in the time domain, etc.
  • a slot may be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain.
  • a slot may be a unit of time based on numerology.
  • a slot may include multiple mini-slots. Each minislot may be composed of one or more symbols in the time domain. Furthermore, a mini-slot may also be called a sub-slot. A minislot may be made up of fewer symbols than a slot.
  • PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots, and symbols all represent time units when transmitting signals. Other names may be used for the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a Transmission Time Interval (TTI)
  • TTI Transmission Time Interval
  • multiple consecutive subframes may be called a TTI
  • one slot or minislot may be called a TTI. It's okay.
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (for example, 1-13 symbols), or a period longer than 1ms. It may be.
  • the unit representing TTI may be called a slot, minislot, etc. instead of a subframe.
  • one slot may be called a unit time. The unit time may be different for each cell depending on the numerology.
  • TTI refers to, for example, the minimum time unit for scheduling in wireless communication.
  • a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each terminal 20
  • TTI is not limited to this.
  • the TTI may be a unit of transmission time such as a channel-coded data packet (transport block), a code block, or a codeword, or may be a unit of processing such as scheduling or link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) to which transport blocks, code blocks, code words, etc. are actually mapped may be shorter than the TTI.
  • one slot or one minislot is called a TTI
  • one or more TTIs may be the minimum time unit for scheduling.
  • the number of slots (minislot number) that constitutes the minimum time unit of the scheduling may be controlled.
  • a TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
  • TTI that is shorter than the normal TTI may be referred to as a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
  • long TTI e.g., normal TTI, subframe, etc.
  • short TTI e.g., shortened TTI, etc.
  • TTI with a time length of less than the long TTI and 1ms. It may also be read as a TTI having a TTI length of the above length.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more continuous subcarriers in the frequency domain.
  • the number of subcarriers included in an RB may be the same regardless of the newerology, and may be 12, for example.
  • the number of subcarriers included in an RB may be determined based on newerology.
  • the time domain of an RB may include one or more symbols, and may have a length of one slot, one minislot, one subframe, or one TTI.
  • One TTI, one subframe, etc. may each be composed of one or more resource blocks.
  • one or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. May be called.
  • PRBs physical resource blocks
  • SCGs sub-carrier groups
  • REGs resource element groups
  • PRB pairs RB pairs, etc. May be called.
  • a resource block may be composed of one or more resource elements (RE).
  • 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a Bandwidth Part (which may also be called a partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a certain numerology in a certain carrier.
  • the common RB may be specified by an RB index based on a common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • One or more BWPs may be configured within one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside of the active BWP.
  • “cell”, “carrier”, etc. in the present disclosure may be replaced with “BWP”.
  • radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of symbols included in an RB The number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • a and B are different may mean “A and B are different from each other.” Note that the term may also mean that "A and B are each different from C”. Terms such as “separate” and “coupled” may also be interpreted similarly to “different.”
  • notification of prescribed information is not limited to being done explicitly, but may also be done implicitly (for example, not notifying the prescribed information). Good too.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un terminal comprenant : une unité de transmission qui met en œuvre une transmission de liaison montante au moyen de N (N étant un nombre naturel inférieur ou égal à M) bandes sélectionnées parmi M (M étant un nombre naturel égal ou supérieur à 3) bandes ; et une unité de commande qui commande la transmission de liaison montante en supposant au moins un temps spécifique à réserver pour commuter la bande utilisée dans la transmission de liaison montante d'une première bande à une seconde bande.
PCT/JP2022/030835 2022-08-12 2022-08-12 Terminal, station de base, et procédé de communication WO2024034146A1 (fr)

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JP2019514268A (ja) * 2016-04-01 2019-05-30 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｓｒｓ切り替え、送信及び拡張のためのシステム及び方法

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* Cited by examiner, † Cited by third party
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