Terminal, base station, and communication method

Abstract

A terminal is provided with: a control unit that controls uplink transmission using N bands selected from among M bands, where M is a natural number of 3 or more, and N is a natural number of M or less; and a transmission unit that executes uplink transmission in which a first minimum interval or a second minimum interval longer than the first minimum interval is applied to uplink transmission that switches between the M bands. The control unit applies a second minimum interval to the specific uplink transmission.

Description

Technical Field

[0001] The present disclosure relates to a terminal, a base station, and a communication method in a wireless communication system. Background Art

[0002] The 3rd Generation Partnership Project (3GPP, registered trademark) has standardized Long Term Evolution (LTE) and the 5th generation mobile communication system (also referred to as 5G, New Radio (NR), or Next Generation (NG)), and has also standardized the next generation, which is referred to as Beyond 5G, 5G Evolution, or 6G.

[0003] Moreover, in Release 18 of 3GPP, a mechanism has been studied in which, as a band that can be used in uplink (UL) transmission, 3 or 4 bands can be set, and support is provided for simultaneous transmission using up to 2 bands (UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2 Tx simultaneous transmission) (Non-Patent Document 1).

[0004] In addition, regarding such UL Tx switching, from the viewpoint of reducing the implementation load and complexity of a terminal (User Equipment (UE)), a Minimum Separation Time that specifies the minimum interval of UL transmission for switching between bands has been studied (Non-Patent Document 2).

[0005] Prior Art Documents

[0006] Non-Patent Documents

[0007] Non-Patent Document 1: "New WID on Multi-carrier enhancements", RP-213577, 3GPP TSG RAN Meeting #94e, 3GPP, December 2021

[0008] Non-Patent Document 2: "Draft Report of 3GPP TSG RAN WG1#110bis-e v0.1.0", 3GPP, October 2022 Summary of the Invention

[0009] By setting the Minimum Separation Time, even when the number of bands available for UL transmission increases, the implementation of the UE can be simplified. On the other hand, if a long Minimum Separation Time is set, there is a problem that the flexibility of UL scheduling is reduced.

[0010] Therefore, the following disclosure is completed in view of such a situation, and its purpose is to provide a terminal, a base station, and a communication method that can set an appropriate minimum separation time between UL transmission switches considering implementation and complexity even when the number of bands available for UL transmission increases.

[0011] One aspect of the present disclosure is a terminal (20) including: a control unit (240) that controls uplink transmission using N bands selected from M bands, where M is a natural number of 3 or more and N is a natural number of M or less; and a transmission unit (210) that performs the uplink transmission to which a first minimum interval or a second minimum interval longer than the first minimum interval is applied for the uplink transmission that switches between the M bands, and the control unit applies the second minimum interval to a specific uplink transmission.

[0012] One aspect of the present disclosure is a base station (10) including: a reception unit (120) that performs uplink reception using N bands selected from M bands, where M is a natural number of 3 or more and N is a natural number of M or less; and a control unit (140) that assumes that a first minimum interval or a second minimum interval longer than the first minimum interval is applied to the uplink reception that switches between the M bands, and the control unit assumes that the second minimum interval is applied to a specific uplink reception.

[0013] One aspect of the present disclosure is a communication method including the following steps: controlling uplink transmission using N bands selected from M bands, where M is a natural number of 3 or more and N is a natural number of M or less; and performing the uplink transmission to which a first minimum interval or a second minimum interval longer than the first minimum interval is applied for the uplink transmission that switches between the M bands, and in the step of performing the uplink transmission, the second minimum interval is applied to a specific uplink transmission. Brief Description of the Drawings

[0014] Figure 1 It is a diagram for explaining the wireless communication system in the embodiment of the present invention.

[0015] Figure 2 It is a diagram for explaining the wireless communication system in the embodiments of the present invention.

[0016] Figure 3 It is a diagram showing Case 1 and Case 2 in UL Tx switching.

[0017] Figure 4 It is a diagram showing a structural example of the antenna ports used in transmission for each case in UL Tx switching.

[0018] Figure 5 It is a diagram showing a structural example of the antenna ports used in transmission for each case in UL Tx switching.

[0019] Figure 6 It is a diagram showing an example of UE capability.

[0020] Figure 7 It is a diagram showing an example of RRC configuration.

[0021] Figure 8 It is a diagram showing an example of the switching period.

[0022] Figure 9 It is a diagram showing an example of the switching period.

[0023] Figure 10 It is a diagram showing an example of the length of DL interruption.

[0024] Figure 11 It is a diagram showing Cases 1 to 3 in UL Tx switching.

[0025] Figure 12 It is a diagram showing a structural example of the antenna ports used in transmission for each case in UL Tx switching.

[0026] Figure 13 It is a diagram showing an example of RRC configuration.

[0027] Figure 14 It is a diagram showing an example of a case where a band in UL Tx switching includes multiple carriers.

[0028] Figure 15 This is a diagram showing an example of the structure of the antenna ports used in transmission for each case in UL Tx switching.

[0029] Figure 16 This is a diagram showing an example of the structure of the antenna ports used in transmission for each case in UL Tx switching.

[0030] Figure 17 This is a diagram showing an example of the structure for the case of switching across 4 bands.

[0031] Figure 18 This is a diagram showing an example of the structure of the antenna ports used in transmission for the case of switching across 4 bands.

[0032] Figure 19 This is a diagram showing an example of the basic operation of the embodiment.

[0033] Figure 20 This is a diagram showing an example of the setting of the Minimum Separation Time.

[0034] Figure 21 This is a diagram showing an example of the structure of base station 10.

[0035] Figure 22 This is a diagram showing an example of the structure of terminal 20.

[0036] Figure 23 This is a diagram showing an example of the hardware structure of base station 10 or terminal 20 in the embodiment of the present invention.

[0037] Figure 24 This is a diagram showing an example of the structure of a vehicle. Detailed Embodiments

[0038] Hereinafter, the embodiments will be described based on the drawings. In addition, the same or similar reference numerals are assigned to the same functions and structures, and their descriptions are appropriately omitted.

[0039] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the embodiments described below are examples, and the embodiments applying the present invention are not limited to the following embodiments.

[0040] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are appropriately used. Among them, the existing technologies are, for example, existing LTE or existing NR, but are not limited to existing LTE and NR.

[0041] In addition, in the embodiments of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) used in existing LTE or NR are employed. These are for ease of description, and signals, functions, etc. that are the same as these can also be referred to by other names. In addition, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even for signals used in NR, they are not necessarily clearly denoted as "NR-".

[0042] In addition, in the embodiments of the present invention, the duplex mode can be a TDD (Time Division Duplex) mode, an FDD (Frequency Division Duplex) mode, or can also be a mode other than these (e.g., Flexible Duplex, etc.).

[0043] In addition, in the embodiments of the present invention, "configuring" radio parameters, etc. can be pre-configuring a predetermined value or configuring radio parameters notified from base station 10 or terminal 20.

[0044] Figure 1 is a diagram showing a structural example (1) of the wireless communication system in the embodiments of the present invention. As Figure 1 shown, the wireless communication system in the embodiments of the present invention includes base station 10 and terminal 20. In Figure 1 each, one base station 10 and one terminal 20 are shown, but this is an example, and there can be multiple of each respectively.

[0045] Base station 10 is a communication device that provides more than one cell and communicates wirelessly with terminal 20. The physical resources of wireless signals are defined in the time domain and the frequency domain. The time domain can be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain can be defined by the number of subcarriers or the number of resource blocks. Base station 10 sends synchronization signals and system information to terminal 20. The synchronization signals are, for example, NR-PSS and NR-SSS. The system information is sent, for example, through NR-PBCH and is also referred to as broadcast information. The synchronization signals and the system information can also be referred to as SSB (SS / PBCH block: SS / PBCH block). As Figure 1 shown, base station 10 sends control signals or data to terminal 20 through DL (Downlink), and receives control signals or data from terminal 20 through UL (Uplink). Both base station 10 and terminal 20 are capable of beamforming for signal transmission and reception. In addition, both base station 10 and terminal 20 are capable of applying MIMO (Multiple Input Multiple Output)-based communication to DL or UL. In addition, both base station 10 and terminal 20 can also communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) based on CA (Carrier Aggregation). Also, terminal 20 can communicate via the primary cell of base station 10 and the primary and secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 based on DC (Dual Connectivity).

[0046] Terminal 20 is a communication device with a wireless communication function, such as a smart phone, a mobile phone, a tablet computer, a wearable terminal, a communication module for M2M (Machine-to-Machine), etc. As Figure 1 shown, terminal 20 receives control signals or data from base station 10 through DL, and sends control signals or data to base station 10 through UL, thereby using various communication services provided by the wireless communication system. In addition, terminal 20 receives various reference signals sent from base station 10 and performs measurement of propagation path quality based on the reception results of the reference signals.

[0047] The terminal 20 is capable of performing carrier aggregation in which multiple cells (multiple CCs (Component Carriers)) are bundled to communicate with the base station 10. In carrier aggregation, 1 PCell (Primary cell) and 1 or more SCell (Secondary cells) are used. In addition, a PUCCH SCell having a PUCCH may also be used.

[0048] Figure 2 It is a diagram for explaining an example (2) of the wireless communication system in the embodiment of the present invention. Figure 2 It shows a structural example of a wireless communication system in the case of performing DC (Dual connectivity). As Figure 2 shown, it includes a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node). The base station 10A and the base station 10B are each connected to the core network. The terminal 20 is capable of communicating with both the base station 10A and the base station 10B.

[0049] The cell group provided by the base station 10A as the MN is called an MCG (Master Cell Group), and the cell group provided by the base station 10B as the SN is called an SCG (Secondary Cell Group). In addition, in DC, the MCG is composed of 1 PCell and 1 or more SCell, and the SCG is composed of 1 PSCell (Primary SCG Cell) and 1 or more SCell.

[0050] The processing operations in this embodiment can be executed by Figure 1 the system structure shown, or can be executed by Figure 2 the system structure shown, or can also be executed by system structures other than these.

[0051] In 3GPP, research on operations in enhanced multi-carriers is underway. Specifically, research is being conducted on the following operations: in FR1 (Frequency Range 1), a terminal supporting up to 2 transmissions simultaneously dynamically switches the UL transmission band across 3 or 4 bands. In the following description, "carrier", "CC", and "cell" may sometimes be used synonymously.

[0052] (Regarding the problem)

[0053] In the prior art (Rel-16, Rel-17), the terminal 20 supports the function of being able to switch UL transmission between two bands (two carriers), that is, the UL Tx switching (UL Tx switching) function (uplink transmission switching function). Even for a terminal 20 with only two transmit chains (Tx Chain), by using the UL Tx switching (UL Tx switching) function, it is possible to switch and perform the following operations in time: transmit using two antenna ports in one carrier, or transmit using one antenna port in one carrier and another antenna port for another carrier.

[0054] In addition, a transmit chain (which may also be referred to as a Tx Chain, a transmission system, etc.) is a physical function for transmission in the terminal 20 that is independent of whether actual transmission is performed. It is possible to perform transmission on one carrier using one transmit chain. By switching the carrier (the transmit functional unit corresponding to the carrier) used by the transmit chain, it is possible to switch the carrier that can be transmitted through the transmit chain.

[0055] An antenna port is an antenna that can actually perform transmission using a transmit chain (Tx Chain). Sometimes the transmit chain and the antenna port are used synonymously. In addition, the "antenna port" can also be referred to as a "port".

[0056] Unless otherwise specified, in the following description, one band has one carrier. Therefore, in this specification and the claims, "band" can be replaced with "carrier", and "carrier" can also be replaced with "band". However, the example is that one band has one carrier, and one band can also have multiple carriers. In the case where one band has multiple carriers, their quantity and relationship can be restricted. For example, it can be restricted to at most two carriers that are continuous in frequency. Multiple carriers within one band can be treated in the same way as one UL band (UL band) (carrier: carrier) in the following description.

[0057] In 3GPP, the "function of a terminal that supports up to two simultaneous transmissions in FR1 to dynamically switch the UL transmission band across three or four bands" (UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2 Tx simultaneous transmission for FR1 UEs) has been studied. For convenience, this function can also be referred to as "Rel-18 UL Tx switching (Release 18 uplink transmission switching)".

[0058] The above function is as follows: It is possible to set three or four UL bands (UL band (carrier)) for a terminal that cannot perform UL CA (Carrier Aggregation) or can perform at most 2 UL CAs even if it can, and the base station 10 dynamically indicates transmission using one or at most two of the UL bands (UL band (carrier)).

[0059] With such a function, it is possible to consider the traffic condition or TDD configuration (TDD configuration) among multiple UL bands (UL band) (carrier), and indicate to the terminal 20 UL transmission using a UL band (UL band) (carrier) suitable for use in each time resource. As a result, the frequency utilization efficiency and UL throughput are improved.

[0060] In Rel-16 and Rel-17, UL Tx switching between two bands is standardized. However, in Rel-18 UL Tx switching, it is not clear how to set the UL band (UL band (carrier)) as a switching candidate for the terminal 20, etc.

[0061] Previously, for a terminal 20 that supports UL CA, it was possible to set multiple DL / UL carriers (DL / UL carrier) as serving cells below the number of CCs of the UL CA supported by the terminal 20, and dynamically indicate the UL CC used for transmission among them. However, in Rel-18 UL Tx switching, it is necessary to set a larger number of UL carriers (UL carrier) than the number of CCs of the UL CA supported in UL CA. However, setting a number of UL CCs above the supported number is not envisaged in the prior art.

[0062] As another prior art, there is SUL (supplemental uplink). Association and dynamic switching with NUL (normal uplink) are supported in the SUL framework, but extending the SUL framework is not envisaged.

[0063] Hereinafter, first, the UL Tx switching of Rel-16 and Rel-17 will be described respectively. Then, the capabilities and setting information proposed for Rel-18 UL Tx switching will be described. Among them, the capabilities and setting information specified for the UL Tx switching of Rel-16 and R-17 can also be applied to Rel-18 UL Tx switching.

[0064] In addition, regarding power boosting, switching period, DL interruption, etc., which are used to describe the UL Tx switching of Rel-16 and R-17 respectively, their own operations are basically the same in Rel-18 UL Tx switching as in Rel-16 and R-17.

[0065] (UL Tx switching of Rel-16)

[0066] In Rel-16, the terminal 20 corresponds to two carriers and has two transmit chains. One transmit chain is fixed to one carrier, and the other transmit chain can be associated with any of the two carriers through switching. Therefore, for example, simultaneous transmission based on two antenna ports can be performed on one carrier. Each antenna port can also perform transmission of one antenna port per carrier. These modes can be switched dynamically. The UL Tx switching of Rel-16 is called Rel-16 1Tx-2Tx switching.

[0067] As Figure 3 shown, the structure in which each transmit chain is associated with one carrier is called Case 1, and the structure in which two transmit chains are associated with one carrier is called Case 2.

[0068] Figure 4 The structures of the transmit chains used in transmission for Case 1 and Case 2 in SUL are shown. For example, 1T+1T in Case 1 means that in the Figure 3 example, carrier 2 is connected to transmit chain 1, and carrier 1 is connected to transmit chain 2.

[0069] In addition, 1P+0P in the state of 1T+1T means that transmission based on carrier 1 is performed on antenna port 2, but no transmission is performed on antenna port 1. In SUL, it is not possible to set two carriers simultaneously, so 1P+1P does not exist. In addition, in SUL, in Case 1, it is not envisaged to transmit only NUL (carrier 2), so 0P+1P does not exist.

[0070] In addition, "0P + 2P, 0P + 1P" in Case 2 means: transmission using Carrier 2 is performed on Antenna Port 1 and Antenna Port 2, or transmission using Carrier 2 is performed only on Antenna Port 1.

[0071] In Rel-16 1Tx-2Tx switching in inter-band CA / EN-DC, there are Option 1 where two carriers cannot be used simultaneously and Option 2 where two carriers can be used simultaneously. The transmission chain structure used in the transmission of Option 1 is the same as Figure 4 the structure shown. The transmission chain structure used in the transmission of Option 2 is as Figure 5 shown.

[0072] Figure 6 shows an example of UE capability reported from the terminal 20 to the base station 10 as defined corresponding to Rel-16 1Tx-2Tx switching. Figure 7 shows examples of CellGroupConfig and ServingCellConfig set by the base station 10 for the terminal 20 as defined corresponding to Rel-16 1Tx-2Tx switching.

[0073] uplinkTxSwitchingPeriodLocation-r16 in ServingCellConfig indicates whether a UL Tx switching period is set in the target cell (carrier). Figure 8 and Figure 9 show an example of an operation related to the UL Tx switching period. Figure 8 is an example of the case where a UL Tx switching period is set in Carrier 1. In this case, in either the case of switching from Carrier 1 to Carrier 2 or the case of switching from Carrier 2 to Carrier 1, a UL Tx switching period is generated in Carrier 1. For example, in Figure 8 's case, when transmission is being performed on Carrier 1 and an indication to switch to Carrier 2 is received, after the switching time (switching period) on Carrier 1, transmission on Carrier 2 is performed. Figure 9 is an example of the case where a UL Tx switching period is set in Carrier 2.

[0074] When performing dynamic switching between two carriers, the terminal 20 allows a DL communication interruption of a predetermined length in the DL carrier for the part overlapping with the UL switching period. This length (X OFDM symbols) is defined as shown in Figure 10 shown below.

[0075] Regarding the UL Tx switching of Rel-16, the summary is as follows. Based on the PUSCH scheduling (scheduling command, rank adaptation) from the base station 10, the terminal 20 can dynamically switch between "transmission on one port in carrier 1", "transmission on one port in carrier 2", "transmission on one port in carrier 1 + transmission on one port in carrier 2" (only applicable when option 2 is supported in inter-band CA), and "transmission on two ports in carrier 2 (with or without 3dB power boosting)".

[0076] A switching period is generated when switching the carrier connected to the transmission port. During the switching period, no UL transmission is performed on both carriers. In addition, there is also a case where a DL interruption occurs during the switching period.

[0077] <rel-17>

[0078] Next, Rel-17 is described. In Rel-17, two transmit chains can each correspond to two carriers, so it becomes 2Tx-2Tx UL Tx switching. Since two-port transmission is also possible in Carrier 1, as a case of the connection mode between the transmit chain and the carrier, compared with Rel-16, as Figure 11 shown, in addition to Case 1 and Case 2, Case 3 is also added. Therefore, for the terminal 20 and the base station 10, the difference between Rel-17 (2Tx-2Tx UL Tx switching) and Rel-16 (1Tx-2Tx) becomes necessary.

[0079] In Rel-17 (2Tx-2Tx UL Tx switching), the mode of the number of transmit ports in each case is as Figure 12 shown. In Figure 12 , the mode of the number of transmit ports regarding each case and each option (whether two-carrier simultaneous transmission is possible) is shown.

[0080] Here, for example, when the terminal 20 performing UL CA option 2 is instructed 1P+0P in the state of Case 2, or 0P+1P in the state of Case 3, the terminal 20 needs to decide which of the remaining two cases to switch to.

[0081] Figure 13 An example of the RRC configuration in Rel-17 is shown. In Figure 13 , uplinkTxSwitching-2T-Mode-r17 represents the setting of the mode that becomes 2Tx-2Tx UL Tx switching, and uplinkTxSwitching-DualUL-TxState-r17 is the information for setting which case to switch to when there are multiple candidates regarding which case to switch to during handover as described above.

[0082] In addition, in the UL Tx switching of Rel-17, as Figure 14 shown, the number of bands is two, but it supports using two consecutive carriers in one of the bands. Figure 15 And Figure 16 show the structural examples of the transmit ports in each case in the example of Figure 14 .

[0083] The functions, setting values, specified values, etc. of Rel-16 and Rel-17 described above can also be applied to Rel-18 UL Tx switching.

[0084] (Rel-18 UL Tx switching)

[0085] Figure 17 And Figure 18 shows the scenarios envisioned in Rel-18 UL Tx switching and the structure of the ports for transmission in each scenario. Here, as an example, the frequency bands available for UL Tx switching are set to four bands, A to B.

[0086] As Figure 17 shown, there are two Tx chains (two antenna ports), each of which can be switched to any one of the frequency bands A to D. This is denoted as "2Tx-2Tx(-2Tx-2Tx)switching". If it is envisioned that one carrier can be used in each frequency band, then as Figure 18 shown, the maximum number of scenarios is 10 (assuming the case of CA option 2).

[0087] In addition to the above assumptions, a scenario of 1Tx-2Tx(-1Tx-1Tx)switching is also considered, where the frequency band (carrier) available for one port is fixed.

[0088] Also, as Figure 14 shown, a scenario where there are two consecutive carriers in some of the frequency bands (a total of five or more carriers) is also considered.

[0089] Regarding the Rel-18 UL Tx switching envisioned as above, since there is no prior art related to the content of the capability report from the terminal 20 to the base station 10 and the setting / indication from the base station 10 to the terminal 20, in the prior art, it may not be possible to appropriately implement "UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2Tx simultaneous transmission".

[0090] Therefore, in the present embodiment, the capability report and the setting / indication that can appropriately implement "UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2Tx simultaneous transmission" will be described.

[0091] In addition, in this embodiment, although "UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2 Tx simultaneous transmission" is envisioned, this is just an example. The maximum number of bands that can be the range for transmission switching can also be greater than 4. In addition, the number of antenna ports used during transmission can also be greater than 2. That is to say, there can be a situation where simultaneous transmission occurs at more than 3 antenna ports.

[0092] (Overview of the Embodiment)

[0093] This embodiment has a first embodiment to a third embodiment. Refer to Figure 19 , and a basic operation example common to the first embodiment A to the third embodiment will be described.

[0094] In the first embodiment, an example of the capability information in which the terminal 20 transmits the capability information to the base station 10 in S101 is described. In S102, the base station 10 transmits setting information (or indication information) to the terminal 20. An example of the setting information / indication information is described in the second embodiment.

[0095] In addition, within the capabilities of the terminal 20 indicated by the capability information of the terminal 20 received by the base station 10 in S101, the base station 10 determines the setting / indication content for the terminal 20, generates the setting information / indication information, and transmits it in S102. However, such an envisioning is just an example.

[0096] The terminal 20 that receives the setting information / indication information in S102 operates according to this information. In S103, if the terminal 20 receives DCI from the base station 10, for example, according to the setting information, based on this DCI, it switches the band to which the port is connected, and transmits in S104 using the switched port.

[0097] The transmission of the setting information / indication information in S102 can be performed by any one of RRC signaling, MAC CE, and DCI. The outlines of the first embodiment and the second embodiment are as follows.

[0098] <Outline of the First Embodiment>

[0099] As a function that the terminal 20 itself supports for Rel-18 UL Tx switching, the terminal 20 reports at least any one of the following listed multiple capability information as the capability information to the base station 10. The following listed examples are all examples of capability information related to bands.

[0100] ·Band combinations supported for UL Tx switching (e.g., up to 3 or 4 bands)

[0101] ·Number of CCs that can be supported in each band

[0102] ·Whether a DL carrier (downlink carrier) associated with each band is required

[0103] ·For each combination of bands for which switching is performed: {Whether simultaneous transmission is supported, switching period generated, band with DL interruption, Whether power boosting is supported}

[0104] ·Number of ports that can switch bands

[0105] ·Target bands of ports with fixed bands

[0106] ·Candidate bands for switching for each port

[0107] <Summary of the Second Embodiment>

[0108] As setting information / indication information for Rel-18 UL Tx switching, the terminal 20 receives at least any one of the following listed multiple setting information / indication information from the base station 10. In other words, the base station 10 transmits at least any one of the following listed multiple setting information / indication information to the terminal 20. The following listed examples are all examples of information related to band switching.

[0109] ·UL DL / UL serving cells for Rel-18 UL Tx switching and UL only serving cells (or any one of DL / UL serving cells and UL only serving cells)

[0110] ·Other serving cells that can be indicated for switching and / or simultaneous transmission in each serving cell

[0111] ·For each combination of each serving cell with other serving cells {whether it includes a switching period, whether power boosting is possible, whether simultaneous transmission is possible, case explanation in the situation where a switch from a specific port structure to another specific port structure is indicated}

[0112] ·Number of ports for which the band region is the switching object

[0113] ·Whether each serving cell is associated with a port for which the band region is the switching object (or non-switching object)

[0114] Hereinafter, the first embodiment and the second embodiment will be described in detail respectively. Examples 1 to 9 of the first embodiment can be implemented in combination with any one of Examples 1 to 9 of the second embodiment respectively.

[0115] (First Embodiment)

[0116] In the first embodiment, the terminal 20 reports at least any one of the capability information shown in Examples 1 to 9 below to the base station. In addition, information obtained by combining any plurality or all of Examples 1 to 9 may also be reported.

[0117] <Example 1>

[0118] The terminal 20 reports information related to one or more band combinations (BCs) for UL Tx switching supported for Rel-18 UL Tx switching separately from the BCs for UL CA to the base station 10.

[0119] Among the reported BCs for UL Tx switching, BCs not corresponding to UL CA may be included. Each BC included in one or more band combinations (BCs) for UL Tx switching may be information representing a combination of band regions to be switched.

[0120] For example, when the terminal 20 reports BC1, BC2, and BC3 as BCs for UL CA, the terminal 20 may report BC4 and BC5 as band combinations (BCs) for UL Tx switching.

[0121] In addition, as a variation, there may be a restriction that each BC included in one or more band combinations (BCs) for UL Tx switching reported needs to be a BC corresponding to UL CA.

[0122] In addition, as another variation, there may be the following restriction: When reporting the BC for UL Tx switching in Rel-18, it is necessary to report the capability specified in Rel-16 / 17 for each band combination within the BC. In this case, for example, when reporting the BC of Band A-B-C in Rel-18, it is necessary to report the capability specified in Rel-16 / 17 for A-B, A-C, and B-C.

[0123] In addition, as another variation, there may be the following restriction: When reporting the BC for UL Tx switching in Rel-18, it is necessary to support each "band combination" within the BC. In this case, for example, when reporting the BC of Band A-B-C in Rel-18, it is also necessary to support A-B, A-C, and B-C.

[0124] <Example 2>

[0125] The terminal 20 reports information related to the number of CCs supported in each band of the BC for UL Tx switching described in Example 1 to the base station 10. The information related to the number of CCs may be the number of CCs (number of cells) itself. Additionally, the band in Example 2 (the band for reporting the number of CCs) may be a band other than the bands within the BC reported in Example 1.

[0126] In addition, in Rel-18 UL Tx switching, the upper limit of the number of CCs that can be supported in each band or the total bandwidth may be specified by the specification. For example, for each band, as the number of CCs that the terminal 20 can support, it may be specified as "up to 2 consecutive CCs" or "consecutive CCs within a 100 MHz band", etc. In addition, the upper limit of the number of CCs that can be supported or the total bandwidth may be specified not for each band but for TDD and FDD respectively. For example, the base station 10 sets the CCs for the terminal 20 within the band for UL Tx switching according to these specifications.

[0127] <Example 3>

[0128] In each band of the BC for UL Tx switching described in Example 1, the terminal 20 reports to the base station 10 information on whether a DL carrier associated with that band is required. For example, in the case where there are bands _A, _B, and _C of a certain BC, for that BC, information such as {Band _A: DL carrier is required, Band _B: DL carrier is not required, Band _C: DL carrier is not required} is reported. In addition, as the terminal 20, basically as long as DL reception can be performed through any carrier, it is possible to set that a DL carrier is not required in a certain band.

[0129] In addition, the conditions for UL carriers / bands for which the associated DL carrier is not required can be specified by the specification. As conditions, for example, there are the following conditions: it is TDD (or FDD); it is a specific band; only when a specific band is included in the BC.

[0130] In addition, the band in Example 3 (the band for reporting whether a DL carrier is required) can be a band other than the bands within the BC reported in Example 1.

[0131] <Example 4>

[0132] The terminal 20 reports to the base station 10 information on whether it supports simultaneous transmission for each combination of bands for which switching within the BC for UL Tx switching described in Example 1 is performed.

[0133] For example, the terminal 20 reports to the base station 10 information such as in the BC of bands A - B - C - D, bands A - B can perform simultaneous transmission (dual UL or Both), A - C and A - D cannot perform simultaneous transmission (switched UL), etc.

[0134] In addition, the terminal 20 can report to the base station 10 information on the following: whether it supports simultaneous transmission, not for each combination of bands for which switching is performed, but for each band or all combinations within the BC, or for all BCs for Rel-18 UL Tx switching supported by the terminal 20.

[0135] In addition, the band in Example 4 (the band for reporting whether simultaneous transmission is supported) can be a band other than the bands within the BC reported in Example 1.

[0136] <Example 5>

[0137] The terminal 20 reports information regarding the switching period for each combination of bands in which switching is performed 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.

[0138] For example, the terminal 20 reports to the base station 10 information such as the switching period of bands A - B in the BC of bands A - B - C - D is n35 μs, and that of A - C and A - D is n140 μs.

[0139] In addition, the terminal 20 may report to the base station 10 as follows: instead of for each combination of bands in which switching is performed, for each band or all combinations within the above - mentioned BC, or for all BCs for Rel - 18 UL Tx switching supported by the terminal, report information regarding the switching period.

[0140] In addition, candidate values of the switching period may be newly defined for Rel - 18 UL Tx switching, and some of the values that can be reported for Rel - 16 / 17 may be made non - reportable for Rel - 18.

[0141] In addition, the band (the band for which the switching period is reported) in Example 5 may be a band other than the bands within the BC reported in Example 1.

[0142] <Example 6>

[0143] The terminal 20 may report the bands that cause DL interruptions for each combination of bands in which switching is performed within the BC for UL Tx switching described in Example 1.

[0144] For example, the terminal 20 reports to the base station 10 as follows: in the BC of bands A - B - C - D, report 0100 for bands A - B and 1010 for A - C. This bitmap represents bands A - B - C - D and means that a DL interruption occurs during switching in the band corresponding to 1 bit.

[0145] In addition, the terminal 20 may report to the base station 10 as follows, that is, instead of for each combination of bands for which switching is performed, for each band or all combinations within the above BC, or for all BCs for Rel-18 UL Tx switching supported by the terminal, report information related to the band that causes a DL interruption.

[0146] In addition, whether DL interruption is allowed for each combination of bands for Rel-18 UL Tx switching, or for each combination of two bands within a band combination, may be specified by the specification.

[0147] In addition, the band in Example 6 (the band that reports a DL interruption) may be a band other than the bands within the BC reported in Example 1.

[0148] In Example 6, the base station 10 that receives information indicating that a DL interruption has occurred in a certain band may, for example, perform scheduling assuming a DL interruption when scheduling DL reception in that band.

[0149] <Example 7>

[0150] The terminal 20 may report information regarding whether it supports power boosting for each combination of bands for which switching is performed within the BC for UL Tx switching described in Example 1.

[0151] For example, the terminal 20 reports information such as the following to the base station 10: In the BC of bands A - B - C - D, power boosting can be performed between bands A - B, and cannot be performed between A - C and A - D. That power boosting can be performed between bands A - B means that, for example, as a result of the terminal 20 performing a port switch between bands A - B and thus sending on two ports in one band, the transmission power (output power) can be increased. Or, that power boosting can be performed between bands A - B may mean that when simultaneously transmitting bands A and B, the transmission power (output power) can be increased.

[0152] In addition, the terminal 20 can report information to the base station 10 regarding whether power boosting is supported, not for each combination of bands for which switching is performed, but for each band or all combinations within the BC, or for all BCs for Rel-18 UL Tx switching supported by the terminal.

[0153] Additionally, the band in Example 7 (the band for which it is reported whether power boosting can be performed) can be a band other than the bands within the BC reported in Example 1.

[0154] Upon receiving information indicating that power boosting can be performed in a certain band, the base station 10 can perform transmission power control based on DCI or MAC CE on the terminal 20 when scheduling simultaneous transmission on two ports in that band to perform power boosting.

[0155] <Example 8>

[0156] The terminal 20 can report information to the base station 10 regarding the number of ports (e.g., 1 or 2) within the BC for UL Tx switching described in Example 1 that can perform band switching. Additionally, in the case where there is a port with a fixed band, the target band of the port with the fixed band can be reported. For example, the terminal 20 reports information such as the following to the base station 10: In the BC of bands A - B - C - D, port 1 has band A fixed.

[0157] Furthermore, in the case where there is a port with a fixed band, a predetermined number of layers (e.g., 2) can be reported as the MIMO layer number for its target band, and it can be set such that a predetermined number of layers (e.g., 2) cannot be reported as the MIMO layer number for bands other than this.

[0158] Moreover, the band in Example 8 (the target band for reporting the number of ports that can switch bands) can be a band other than the bands within the BC reported in Example 1.

[0159] <Example 9>

[0160] The terminal 20 can report information regarding the candidate bands for switching in each port within the BC for UL Tx switching described in Example 1. For example, the terminal 20 reports information such as the following to the base station 10: In the BC of bands A - B - C - D, for port 1, A and B are switching candidates, and for port 2, A, B, C, and D are switching candidates.

[0161] In addition, the terminal 20 can report the corresponding number of ports in each band within the above BC to the base station 10 (e.g., 2 for A, 2 for B, 1 for C, 1 for D, etc.).

[0162] In addition, the band (handover candidate band) in Example 9 can be a band other than the bands within the BC reported in Example 1.

[0163] As described above, by using the techniques related to the first embodiment illustrated in Examples 1 to 9, the base station 10 can know the capabilities related to UL Tx switching of the terminal 20, and thus can perform settings, indications, or scheduling for appropriately performing UL Tx switching.

[0164] (Second Embodiment)

[0165] In the second embodiment, the terminal 20 is set or indicated by the base station 10 through any one or a combination of RRC signaling, MAC-CE, and DCI in at least any one of the following Examples 1 to 9. In addition, the base station 10 can set or indicate any combination of multiple or all of Examples 1 to 9 to the terminal 20.

[0166] <Example 1>

[0167] The terminal 20 is set by the base station 10 to include a DL / UL serving cell (a cell having a UL carrier and a DL carrier) for Rel-18 UL Tx switching, or a UL only serving cell (a cell with only a UL carrier) for Rel-18 UL Tx switching. The terminal 20 can be set by the base station 10 to include both a DL / UL serving cell for Rel-18 UL Tx switching and a UL only serving cell for Rel-18 UL Tx switching. Here, "setting a certain piece of information" means that the terminal 20 receives the information from the base station 10.

[0168] The base station 10 can determine which cell to set for the terminal 20 based on the capabilities 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 for the terminal 20.

[0169] In addition, for example, the base station 10 can set, for the terminal 20, a cell in a band region that does not require a DL carrier as a UL-only serving cell based on the information received in Example 3 of the first embodiment.

[0170] It is assumed that the serving cells in Examples 2 to 9 hereafter are the cells set for the terminal 20 in Example 1. However, this is not limiting, and the serving cells in Examples 2 to 9 hereafter can also be cells other than the cells set in Example 1.

[0171] The setting / indication in Examples 2 to 9 hereafter can be performed at the time of setting the cell in Example 1, or can be performed at a timing after the time of setting the cell in Example 1.

[0172] <Example 2>

[0173] The terminal 20 receives a specific IE / parameter from the base station 10 via ServingCellConfig for a certain cell, and thus the specific IE / parameter is set in the terminal 20.

[0174] The terminal 20 can identify that the cell contains a UL for Rel-18 UL Tx switching based on the specific IE / parameter received from the base station 10. In addition, ServingCellConfig is an example, and other messages or signals can also be used.

[0175] <Example 3>

[0176] The terminal 20 can identify that the cell is a UL-only serving cell for Rel-18 UL Tx switching by having the base station 10 set a specific IE / parameter for a certain cell via ServingCellConfig.

[0177] In addition, the terminal 20 can identify that the cell is a UL-only serving cell for Rel-18 UL Tx switching if the base station 10 does not set a specific IE / parameter in ServingCellConfig for a certain cell.

[0178] In addition, ServingCellConfig is an example, and other messages or signals can also be used.

[0179] <Example 4>

[0180] The terminal 20 is set by the base station 10 with information related to other serving cells that can be indicated for handover and / or simultaneous transmission in each serving cell. For example, it is assumed that the information of other serving cells that can be indicated for handover / simultaneous transmission is included in ServingCellConfig.

[0181] For example, the terminal 20 assumes the following: When receiving an RRC message (e.g., ServingCellConfig) for cell A, if cell B is detected as another serving cell that can be indicated for handover / simultaneous transmission in the RRC message, the handover / simultaneous transmission between cell A and cell B can be indicated.

[0182] <Example 5>

[0183] The terminal 20 can be set by the base station 10 with information on whether each combination with other serving cells in each serving cell includes a switching period. Alternatively, information can be set on whether a switching period is included, not in units of each combination with other serving cells, but in units of serving cells or cell groups.

[0184] For example, it is assumed that information on whether a switching period is included is included in a certain RRC message (e.g., ServingCellConfig, CellGroupConfig). For example, it is assumed that the terminal 20 receives an RRC message for cell A and detects information in the RRC message indicating that "during the handover between cell A and cell B, there is a switching period in cell B". In this case, when the terminal 20 receives UL scheduling information for a handover between cell A and cell B, the handover is performed during the switching period on the cell B side.

[0185] <Example 6>

[0186] The terminal 20 is set by the base station 10 with information on whether power boosting can be performed for each combination of each serving cell with other serving cells. Alternatively, information can be set on whether power boosting can be performed not in units of each combination with other serving cells, but in units of serving cells or cell groups.

[0187] For example, assume that information on whether power boosting can be performed is included in a certain RRC message (e.g., ServingCellConfig, CellGroupConfig). At this time, for example, assume that the terminal 20 receives the RRC message and detects in the RRC message information indicating that "power boosting can be performed when two ports are simultaneously transmitted in cell A during the handover between cell A and cell B". In this case, the terminal 20 performs power boosting, for example, when receiving UL scheduling information for simultaneous transmission of two ports in cell A through the handover from cell B to cell A.

[0188] <Example 7>

[0189] The terminal 20 is set by the base station 10 with information on whether simultaneous transmission can be performed for each combination of each serving cell with other serving cells. Alternatively, information can be set on whether simultaneous transmission can be performed not in units of each combination with other serving cells, but in units of serving cells or cell groups. Regarding the setting in units of serving cells, for example, when "simultaneous transmission OK" is set in the setting for cell A, it can mean that as long as it is a combination with cell A, simultaneous transmission with any cell is possible.

[0190] For example, it is assumed that a certain RRC message (e.g., ServingCellConfig, CellGroupConfig) contains information on whether simultaneous transmission is possible. In this case, for example, it is assumed that the terminal 20 receives an RRC message for cell A and detects information indicating that "simultaneous transmission is possible in cell A and cell B" in the RRC message. In this case, the terminal 20 assumes that it receives UL scheduling information that generates simultaneous transmission in cell A and cell B. In this case, the base station 10 can perform UL scheduling for the terminal 20 to generate simultaneous transmission in cell A and cell B.

[0191] <Example 8>

[0192] The terminal 20 may be set by the base station 10 with information related to the case interpretation in which a switching from a specific port structure to another specific port structure is indicated for each combination with other serving cells in each serving cell. Alternatively, information related to the case interpretation in which a switching from a specific port structure to another specific port structure is indicated not in units of each combination with other serving cells but in units of serving cells or in units of cell groups may be set.

[0193] For example, assume that a certain RRC message (eg, ServingCellConfig, CellGroupConfig) contains information about case interpretation.

[0194] At this time, for example, the terminal 20 receives the above-mentioned RRC message, and if it is detected that the RRC message contains "when migrating from the state of a certain Txchain (a certain situation number) to the state of other Tx chains (other situation numbers) after UL Tx switching, when the situation number of the migration target is not uniquely determined, information for uniquely determining the situation number of the migration target", then based on the information, the Tx chain (port structure) that is the migration target after UL Tx switching is determined.

[0195] The above-mentioned “information for determination” may be an explicit “combination of the situation number before migration and the situation number of the migration destination”, or may be information indicating “two ports are connected to one carrier”, or information indicating “one port is connected to one carrier”.

[0196] Here, as an example, suppose that Figure 17 as well as Figure 18 The case structure and the situation of the transmission port structure. In addition, here, it is assumed that "Option 2: Simultaneous transmission across up to 2 carriers" is set. In addition, for the sake of simplicity of explanation, it is assumed that only Figure 18 Case 1, Case 2, and Case 3 are considered.

[0197] In the terminal 20, it is assumed that as the above explicit information, "Before migration, it is in Case 2. When Case 1 and Case 3 exist as candidates for the migration target, migrate to Case 3" is set. At this time, when the terminal 20 is in the state of Case 2 and a scheduling equivalent to 1P+0P+0P+0P is performed through DCI, it switches to Case 3.

[0198] In the terminal 20, it is assumed that information indicating "1 port is connected to 1 carrier" is set as the above information. At this time, when the terminal 20 is in the state of Case 2 and a scheduling for UL transmission of 1P+0P+0P+0P is performed through DCI, it switches to Case 1.

[0199] The base station 10 can perform subsequent scheduling assuming the above migration target.

[0200] <Example 9>

[0201] The terminal 20 is set by the base station 10 with information related to the number of ports for which the band switching target is a cell group. In addition to this, or instead of this, the terminal 20 can be set by the base station 10 with information on whether each serving cell has been associated with a port for which the band switching target is set. In addition, the terminal 20 can be set by the base station 10 with information on whether each serving cell has been associated with a port that is not a band switching target.

[0202] The information on whether a serving cell has been associated with a port for which the band switching target is set is an example of information related to the antenna port that is the object of band switching. The information on whether a serving cell has been associated with a port that is not a band switching target is an example of information related to the antenna port that is not the object of band switching.

[0203] For example, when the terminal 20 receives, via an RRC message from the base station 10, information equivalent to "Cell A and Cell B are handover targets for Port 1, and Port 2 is fixedly used in Cell C", the terminal 20 performs scheduling corresponding to "Transmission is performed via Port 1 in Cell A or Cell B, and transmission is performed via Port 2 in Cell C". In addition, the base station 10 can perform scheduling corresponding to "Transmission is performed via Port 1 in Cell A or Cell B, and transmission is performed via Port 2 in Cell C" for the terminal 20.

[0204] As described above, in the technology related to the second embodiment illustrated by Use Examples 1 to 9, the base station 10 can perform setting / indication corresponding to the capabilities related to UL Tx switching for the terminal 20, and thus UL Tx switching can be appropriately implemented.

[0205] (Third Embodiment)

[0206] (Premises and Problems)

[0207] In 3GPP Rel-18, from the viewpoint of reducing the implementation load and complexity of the terminal 20, a Minimum Separation Time that specifies the minimum interval of UL transmission for handover between bands has been studied.

[0208] Specifically, regarding UL Tx switching schemes across up to 3 or 4 bands, the following options have been studied for the Minimum Separation Time between two UL Tx switchings. Other options are not excluded.

[0209] · Option 1 (Alt.1): 14 symbols based on the subcarrier spacing (SCS) are specified as the Minimum Separation Time.

[0210] · Option 2 (Alt.2): UL Tx switching within the reference time slot based on SCS is set to 1 time or less.

[0211] · Option 3 (Alt.3): When a total of 3 bands are involved, the X time slot is specified as the Minimum Separation Time. When a total of 4 bands are involved, the Y time slot is specified as the Minimum Separation Time. X and / or Y is set to 1 or more.

[0212] · Option 4 (Alt.4): The terminal reports the Minimum Separation Time for different switching cases.

[0213] In 3GPP Rel-16 and 17, regarding the interval of UL Tx switching, it is specified as follows in Section 6.16 of TS38.214.

[0214] The UE does not expect to perform multiple UL Tx switchings in a time slot where μUL = max(μ UL，1 , μ UL，2 ). μ UL，1 corresponds to the SCS of the active UL BWP of one UL carrier before the switching gap, and μ UL，2 corresponds to the SCS of the active UL BWP of another UL carrier after the switching gap.

[0215] In addition, the switching gap can be interpreted as the time difference (N TX1 , N TX2 ) between two UL transmissions (N TX1 - N TX2 ) as specified in, for example, Section 6.1.6 of 3GPP TS38.214, but can also be substantially interpreted as equivalent to the switching period shown in Figure 8 etc. The switching gap can be used for the switched UL of the handover and is applied to reduce complexity. The switching gap can be specified to be different from the existing switching period.

[0216] As described above, it is specified that more than two UL Tx switchings are not envisioned within a time slot. For example, UL Tx switching can be performed in the second half of time slot n and at the beginning of time slot n + 1. In this case, since the interval of UL Tx switching becomes shorter, there are concerns such as increased complexity in UE implementation.

[0217] In addition, the Minimum Separation Time has the following advantages and disadvantages.

[0218] · When there is a Minimum Separation Time and the Minimum Separation Time is long, it is possible for the UE to simplify the implementation of UL Tx switching (for example, it is possible to rewrite the content of the memory before switching to the next UL transmission without increasing the memory size of the radio frequency (RF) information).

[0219] · When there is a Minimum Separation Time and the Minimum Separation Time is long, the flexibility of UL scheduling for the UE is reduced (for example, it restricts the scheduling of transmissions that require UL Tx switching).

[0220] Compared with Rel-16 and 17, it is not preferable that the restriction extremely increases or the implementation load of the UE becomes high. On the other hand, in Rel-18, UL Tx switching occurs in 3 or 4 bands, and switching migrations not envisioned in Rel-16 and 17 may also occur.

[0221] <Action summary>

[0222] In this embodiment, for UL Tx switching, the Minimum Separation Time is specified in multiple stages. The multiple stages can be two stages, but not necessarily two stages, and the Minimum Separation Time for more stages can also be specified. Here, the Minimum Separation Time for two stages is envisioned.

[0223] The Minimum Separation Time can be interpreted as the minimum interval between UL transmissions based on switching between M (M is a natural number of 3 or more) bands and two adjacent UL Tx switchings in the time direction. The Minimum Separation Time specifies the minimum interval between these two UL transmissions, and can also be said to be the minimum separation time that separates these two UL transmissions in the time direction.

[0224] Figure 20 Shows a setting example of the Minimum Separation Time. Figure 20 An example showing the minimum separation time between UL transmissions (UL TX) in units of symbols is presented. Additionally, the unit of the minimum separation time is not limited to symbols and can also be a time slot, a mini-slot, a half-frame, etc. Furthermore, in Figure 20 the number of symbols from the start of the previous UL transmission to the start of the next UL transmission (which may include a switching gap) is set as the minimum separation time, but as long as the interval between these two UL transmissions can be defined, other time-direction positions can also be used as a reference.

[0225] Specifically, as a baseline (phase 1), a loose (short) minimum separation time can be defined. This short minimum separation time can also be referred to as the first minimum interval. For example, as Figure 20 shown, the number of symbols less than X symbols can be set as this short minimum separation time. For example, the same regulations as in Rel-16 and 17 can be applied and extended to consider the SCS of 3 or 4 bands.

[0226] As an additional (phase 2) minimum separation time (which can also be called the Additional Minimum Separation Time), a strict (long) minimum separation time that is only applied in specific situations can be defined. Examples of specific situations are as follows.

[0227] · Only applied to the UE that reports specific UE capabilities

[0228] · Only applied between UL Tx switchings that meet specific conditions

[0229] · The above two combinations

[0230] This long minimum separation time can also be referred to as the second minimum interval. For example, as Figure 20 shown, the number of symbols equal to or more than X symbols can be set as this short minimum separation time.

[0231] Thus, the terminal 20 (UE) can perform UL transmissions that switch between M bands with a relaxed (short) minimum separation time (the first minimum interval) to which a baseline is applied, or a strict (long) minimum separation time (the second minimum interval) that is longer than the minimum separation time of the baseline, and can apply a long minimum separation time to specific UL transmissions as described above.

[0232] In addition, the terminal 20 can commonly apply the relaxed (short) minimum separation time of the baseline to all UL transmissions. However, the minimum separation time of the baseline may not be common to all UL transmissions, and multiple different values (such as the number of symbols) may be set.

[0233] With such a terminal 20 and base station 10, when performing UL Tx switching schemes across up to 3 or 4 bands, multiple minimum separation times of different lengths can be applied to specific UL transmissions, so that UL Tx switching can be performed considering the implementation load of the terminal and the flexibility of scheduling.

[0234] <Operation Example 1>

[0235] As the relaxed (short) minimum separation time of the baseline, at least any one of the following options can be applied.

[0236] · Option 1: In one time slot of the maximum SCS in the active UL BWP (Bandwidth part) of all bands included in the band combination (BC) based on the set 3 or 4 bands, the UL Tx switching is set to at most 1 time.

[0237] · Option 2: In one time slot of the maximum SCS in the active UL BWP of the bands (the band before switching and the band after switching) included in the UL Tx switching performed thereafter, the UL Tx switching is set to at most 1 time.

[0238] · Option 3: Set the length of the number of symbols N of the maximum (or minimum) SCS in the active UL BWP of all the bands included in the band combination based on the set 3 or 4 bands as the Minimum Separation Time.

[0239] · Option 4: Set the length of the number of symbols N of the maximum (or minimum) SCS in the active UL BWP of the bands (the band before switching and the band after switching) included in the subsequent UL Tx switching as the Minimum Separation Time.

[0240] In this way, a loose (short) Minimum Separation Time of the baseline can be set based on the SCS of the active BWP (bandwidth part) of M (for example, 3 or 4) bands. In addition, the Minimum Separation Time based on the SCS may refer to the time of one symbol obtained according to the set SCS (for example, if it is 120 kHz SCS, it is 8.325 μs).

[0241] <Operation Example 2>

[0242] The loose (short) Minimum Separation Time of the baseline can be commonly applied to all UL transmissions, and the strict (long) Minimum Separation Time (Additional Minimum Separation Time) can be applied only to specific situations as described above. As more specific specific situations, the following examples can be included.

[0243] · (Example of a UE that reports specific UE capabilities)

[0244] · A UE that supports dual UL for 3 or 4 band UL Tx switching

[0245] · A UE that supports up to 2 ports (up to 2 ports) for multiple bands

[0246] · A UE that supports UL Tx switching including 3 or 4 bands (supports 1T+1T, etc.)

[0247] · Report a UE that requires Additional Minimum Separation Time as a new capability

[0248] Thus, when the terminal 20 (UE) sends specific capability information of the terminal 20, the Additional Minimum Separation Time (the second minimum interval) can be applied to the UL transmission.

[0249] · (Example applied only between UL Tx switchings that meet specific conditions)

[0250] · Between UL Tx switchings that include 3 or 4 bands

[0251] · Between UL Tx switchings that include a band or a band pair that reports a need for Additional Minimum Separation Time

[0252] Tx switchings

[0253] In addition, the Additional Minimum Separation Time can be applied to a combination of an example of a UE that only applies to a UE reporting specific UE capabilities and an example that is only applied between UL Tx switchings that meet specific conditions.

[0254] Furthermore, as a strict (long) Minimum Separation Time (Additional Minimum Separation Time), at least any one of the following options can be applied.

[0255] · Option 1: In the X time slots with the maximum SCS in the active UL BWP of all the bands included in the band combination (BC) based on the set 3 or 4 bands, the UL Tx switching is set to a maximum of Y times.

[0256] · Option 2: In the X time slots with the maximum SCS in the active UL BWP of the bands (the band before switching and the band after switching) included in the UL Tx switching performed thereafter, the UL Tx switching is set to a maximum of Y times.

[0257] · Option 3: Set the length of the number of symbols M of the maximum (or minimum) SCS in the active UL BWP of all the bandwidth parts included in the bandwidth part combination of 3 or 4 configured bandwidth parts as the Additional Minimum Separation Time.

[0258] · Option 4: Set the length of the number of symbols M of the maximum (or minimum) SCS in the active UL BWP of the bandwidth parts (the bandwidth part before switching and the bandwidth part after switching) included in the subsequent UL Tx switching as the Additional Minimum Separation Time.

[0259] In addition, it can be M≥N, X>1, Y≥1, X>Y.

[0260] In this way, a strict (long) Additional Minimum Separation Time can be set based on the SCS of the active BWP (bandwidth part) of M (for example, 3 or 4) bandwidth parts.

[0261] <Others>

[0262] In Operation Example 1, the operations related to the loose (short) minimum separation time from the baseline are described. In Operation Example 2, the operations related to the strict (long) minimum separation time (Additional Minimum Separation Time) are described. However, operations obtained by combining a part of each operation example can also be applied, and any operation example can also be partially applied.

[0263] In addition, as described above, units in the time direction such as time slots and symbols used in the operation examples can also be expressed in other similar units.

[0264] (Device Structure)

[0265] Next, a functional structure example of the base station 10 and the terminal 20 that execute the processes and operations described above will be described.

[0266] <Base Station 10>

[0267] Figure 21 is a diagram showing an example of the functional structure of the base station 10. As Figure 21 shown, the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140. Figure 21 The functional structure shown is just one example. As long as it can perform the actions involved in the embodiments of the present invention, the functional division and the names of the functional units can be arbitrary. In addition, the transmitting unit 110 and the receiving unit 120 can also be collectively referred to as a communication unit.

[0268] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher layer information from the received signals. In addition, the transmitting unit 110 has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DCI based on PDCCH, data based on PDSCH, etc. to the terminal 20.

[0269] The setting unit 130 stores the preset setting information and various setting information to be transmitted to the terminal 20 in the storage device provided in the setting unit 130, and reads it from the storage device as needed.

[0270] The control unit 140 schedules the DL reception or UL transmission of the terminal 20 via the transmitting unit 110. In addition, the control unit 140 includes the function of performing LBT. The functional units related to signal transmission in the control unit 140 can also be included in the transmitting unit 110, and the functional units related to signal reception in the control unit 140 can be included in the receiving unit 120. In addition, the transmitting unit 110 can also be called a transmitter, and the receiving unit 120 can be called a receiver.

[0271] <Terminal 20>

[0272] Figure 22 is a diagram showing an example of the functional structure of the terminal 20. As Figure 22 shown, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. Figure 22 The functional structure shown is just one example. As long as it can perform the actions involved in the embodiments of the present invention, the functional division and the names of the functional units can be arbitrary. The transmitting unit 210 and the receiving unit 220 can also be collectively referred to as a communication unit.

[0273] The transmitting unit 210 generates a transmission signal based on transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains a higher-layer signal from the received physical-layer signal. In addition, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, DCI based on PDCCH, data based on PDSCH, etc. transmitted from the base station 10. In addition, for example, in D2D communication, the transmitting unit 210 can also transmit PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to other terminals 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH, or PSBCH, etc. from other terminals 20. In addition, the transmitting unit 210 includes the antenna ports described in this embodiment.

[0274] The setting unit 230 stores various setting information received from the base station 10 or other terminals through the receiving unit 220 in the storage device included in the setting unit 230 and reads it from the storage device as needed. In addition, the setting unit 230 also stores preset setting information.

[0275] The control unit 240 controls the terminal 20. The functional unit related to signal transmission in the control unit 240 may be included in the transmitting unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the receiving unit 220. In addition, the transmitting unit 210 may be referred to as a transmitter, and the receiving unit 220 may be referred to as a receiver.

[0276] According to this embodiment, at least the following terminal, base station, and communication method are provided. Hereinafter, the terminal, base station, and communication method will be described in six appendices 1 to 6.

[0277] <Appendix 1>

[0278] (Appendix item 1)

[0279] A terminal includes: a transmission unit that reports, as capability information, the number of antenna ports capable of band switching in the following transmission switching mode, in which at least one antenna port among a plurality of antenna ports can switch bands across two or more numbers of bands and can switch the band for transmission across a total of three or more bands among the plurality of antenna ports; and a reception unit that receives, from the base station, information related to an antenna port that becomes an object of band switching or information related to an antenna port that does not become an object of band switching.

[0280] (Supplementary Note 2)

[0281] A terminal includes: a transmission unit that reports, as capability information, information on the band used by an antenna port that does not perform band switching in the following transmission switching mode, in which at least one antenna port among a plurality of antenna ports can switch bands across two or more numbers of bands and can switch the band for transmission across a total of three or more bands among the plurality of antenna ports; and a reception unit that receives, from the base station, information related to an antenna port that becomes an object of band switching or information related to an antenna port that does not become an object of band switching.

[0282] (Supplementary Note 3)

[0283] The terminal according to Supplementary Note 1 or 2, wherein, when there is an antenna port that does not perform band switching, the transmission unit reports the MIMO layer number of the band used by the antenna port as 2.

[0284] (Supplementary Note 4)

[0285] The terminal according to any one of Supplementary Notes 1 to 3, wherein the transmission unit reports information related to the candidate bands for switching in each antenna port.

[0286] (Supplementary Note 5)

[0287] A base station includes: a reception unit that receives, from a terminal, the number of antenna ports capable of band switching in the following transmission switching mode, in which at least one antenna port among a plurality of antenna ports of the terminal can switch bands across two or more numbers of bands and can switch the band for transmission across a total of three or more bands among the plurality of antenna ports, as capability information; and a transmission unit that transmits, to the terminal, information related to an antenna port that becomes an object of band switching or information related to an antenna port that does not become an object of band switching.

[0288] (Supplementary Note 6)

[0289] A communication method is executed by a terminal. The terminal reports, as capability information, the number of antenna ports capable of band switching in the following transmission switching method. In the transmission switching method, at least one antenna port among multiple antenna ports can switch bands across two or more numbers of bands, and can switch the transmission band across a total of three or more bands of multiple antenna ports. The terminal receives, from the base station, information related to the antenna port that becomes the object of band switching, or information related to the antenna port that does not become the object of band switching.

[0290] According to any one of Items 1 to 6, a technique for appropriately switching the band used in uplink transmission in a wireless communication system is provided. According to Note Item 3, the number of MIMO layers can be appropriately set. According to Note Item 4, simultaneous monitoring can be clearly defined, and the operation becomes clear. Single control information can be received well in the cell of the scheduling source. According to Note Item 3, the switching candidate bands become clear.

[0291] <Note 2>

[0292] (Note Item 1)

[0293] A terminal includes: a transmission unit that reports, as capability information, information related to the band used in the following transmission switching method. In the transmission switching method, at least one antenna port among multiple antenna ports can switch bands across two or more numbers of bands, and can switch the transmission band across a total of three or more bands of multiple antenna ports; and a reception unit that receives, from the base station, the following information, which is used to determine one state among multiple states when migrating from a certain state related to multiple antenna ports to another state through band switching and there are multiple candidate states for the migration destination.

[0294] (Note Item 2)

[0295] The terminal according to Note Item 1, wherein, as the information for determining the one state, the reception unit receives the maximum number of antenna ports that can be used for transmission in one band, or a group of the state before migration and the state as the migration destination.

[0296] (Note Item 3)

[0297] The terminal according to Note Item 1 or 2, wherein the transmission unit reports the number of carriers supported in the band used in the transmission switching method to the base station.

[0298] (Note Item 4)

[0299] The terminal according to any one of Supplementary Notes 1 to 3, wherein the transmitting unit reports information on whether a downlink carrier is required in the band used in the transmission switching method.

[0300] (Supplementary Note 5)

[0301] A base station includes: a receiving unit that receives, as capability information, information related to a band used in a transmission switching method in which at least one antenna port among a plurality of antenna ports of a terminal can switch bands across two or more bands and can switch the band used for transmission across three or more bands in total among the plurality of antenna ports; and a transmitting unit that transmits to the terminal information for determining one state among a plurality of states when there are a plurality of candidate states to be a migration destination when migrating from a certain state related to the plurality of antenna ports to another state by band switching.

[0302] (Supplementary Note 6)

[0303] A communication method executed by a terminal, the terminal reports, as capability information, information related to a band used in a transmission switching method in which at least one antenna port among a plurality of antenna ports can switch bands across two or more bands and can switch the band used for transmission across three or more bands in total among the plurality of antenna ports, and the terminal receives from the base station information for determining one state among a plurality of states when there are a plurality of candidate states to be a migration destination when migrating from a certain state related to the plurality of antenna ports to another state by band switching.

[0304] According to any one of Items 1 to 6, a technique for appropriately switching the band used in uplink transmission in a wireless communication system is provided. According to Supplementary Note 2, the ambiguity of the migration destination can be eliminated and the operation can be appropriately performed. According to Supplementary Note 3, the number of carriers in the band becomes clear. According to Supplementary Note 4, a cell without a downlink carrier can be set.

[0305] <Supplementary Note 3>

[0306] (Supplementary Note 1)

[0307] A terminal includes: a transmission unit that reports to a base station capability information indicating whether power boost can be performed when transmitting on multiple antenna ports in a transmission switching mode, in which at least one of the multiple antenna ports can switch bands across two or more numbers of bands, and can switch the transmission band across a total of three or more bands of multiple antenna ports; and a reception unit that receives from the base station information related to whether power boost can be performed when transmitting on multiple antenna ports.

[0308] (Supplementary Note 2)

[0309] The terminal according to Supplementary Note 1, wherein the transmission unit reports the capability information indicating whether power boost can be performed to the base station for each combination of switched bands within a band combination, for each band, for each combination of all bands within a band combination, or for all supported band combinations.

[0310] (Supplementary Note 3)

[0311] The terminal according to Supplementary Note 1 or 2, wherein the reception unit receives information related to whether power boost can be performed for each combination of serving cells, for each serving cell, or for each cell group.

[0312] (Supplementary Note 4)

[0313] A base station includes: a reception unit that receives from a terminal capability information indicating whether power boost can be performed when transmitting on multiple antenna ports in a transmission switching mode, in which at least one of the multiple antenna ports of the terminal can switch bands across two or more numbers of bands, and can switch the transmission band across a total of three or more bands of multiple antenna ports; and a transmission unit that transmits to the terminal information related to whether power boost can be performed when transmitting on multiple antenna ports.

[0314] (Supplementary Note 5)

[0315] A communication method is executed by a terminal. The terminal reports to a base station capability information indicating whether power boost can be performed when transmitting on multiple antenna ports in a transmission switching mode, in which at least one of the multiple antenna ports can switch bands across two or more numbers of bands, and can switch the transmission band across a total of three or more bands of multiple antenna ports, and the terminal receives from the base station information related to whether power boost can be performed when transmitting on multiple antenna ports.

[0316] According to any one of Items 1 to 5, a technique is provided that can appropriately switch the band used in uplink transmission in a wireless communication system. According to Supplementary Note Item 2, information related to power boost can be reported in various units. According to Supplementary Note Item 3, information related to power boost can be set in various units.

[0317] <Supplementary Note 4>

[0318] (Supplementary Note Item 1)

[0319] A terminal includes: a transmission unit that reports to a base station capability information related to a band in which downlink communication interruption occurs during switching in the following transmission switching method, in the transmission switching method, at least one antenna port among a plurality of antenna ports can switch bands across two or more bands, and can switch the band used for transmission across a total of three or more bands among the plurality of antenna ports; and a reception unit that receives from the base station control information for scheduling uplink transmission.

[0320] (Supplementary Note Item 2)

[0321] The terminal according to Supplementary Note Item 1, wherein the transmission unit reports the capability information related to the band in which downlink communication interruption occurs during switching to the base station for each combination of bands for which transmission switching is performed within a band combination, for each band, for each combination of all bands within the band combination, or for all supported band combinations.

[0322] (Supplementary Note Item 3)

[0323] The terminal according to Supplementary Note Item 1 or 2, wherein, as the capability information, the transmission unit reports a bitmap in which each bit indicates the presence or absence of downlink communication interruption in a band.

[0324] (Supplementary Note Item 4)

[0325] A base station includes: a reception unit that receives from a terminal capability information related to a band in which downlink communication interruption occurs during switching in the following transmission switching method, in the transmission switching method, at least one antenna port among a plurality of antenna ports of the terminal can switch bands across two or more bands, and can switch the band used for transmission across a total of three or more bands among the plurality of antenna ports; and a transmission unit that transmits to the terminal control information for scheduling uplink transmission.

[0326] (Supplementary Note Item 5)

[0327] A communication method, which is executed by a terminal. The terminal reports to a base station capability information related to a band in which a downlink communication interruption occurs during a handover in the following transmission handover method. In the transmission handover method, at least one antenna port among a plurality of antenna ports can switch bands across two or more bands, and can switch the band for transmission across a total of three or more bands among the plurality of antenna ports. The terminal receives control information for scheduling uplink transmission from the base station.

[0328] According to any one of Items 1 to 5, a technique for appropriately switching a band used in uplink transmission in a wireless communication system is provided. According to Note Item 2, information related to a downlink communication interruption can be reported in various units. According to Note Item 3, information related to a downlink communication interruption can be reported efficiently.

[0329] <Note 5>

[0330] (Note Item 1)

[0331] A terminal includes: a transmission unit that reports to a base station capability information indicating a handover time taken for a handover between bands in the following transmission handover method. In the transmission handover method, at least one antenna port among a plurality of antenna ports can switch bands across two or more bands, and can switch the band for transmission across a total of three or more bands among the plurality of antenna ports; and a reception unit that receives from the base station information related to a cell in which the handover time occurs.

[0332] (Note Item 2)

[0333] The terminal according to Note Item 1, wherein the transmission unit reports the capability information indicating the handover time to the base station for each combination of bands to be switched within a band combination, for each band, for each combination of all bands within the band combination, or for all supported band combinations.

[0334] (Note Item 3)

[0335] The terminal according to Note Item 1 or 2, wherein the reception unit receives information related to a cell in which the handover time occurs for each combination of serving cells, for each serving cell, or for each cell group.

[0336] (Note Item 4)

[0337] A base station includes: a receiving unit that receives, from a terminal, capability information indicating a handover time taken for handover between bands in a transmission handover mode in which at least one antenna port among a plurality of antenna ports of the terminal can handover bands across two or more bands and can handover a band for transmission across a total of three or more bands among a plurality of antenna ports; and a transmitting unit that transmits, to the terminal, information related to a cell that generates the handover time.

[0338] (Supplementary Note Item 5)

[0339] A method is executed by a terminal. The terminal reports, to a base station, capability information indicating a handover time taken for handover between bands in a transmission handover mode in which at least one antenna port among a plurality of antenna ports can handover bands across two or more bands and can handover a band for transmission across a total of three or more bands among a plurality of antenna ports, and the terminal receives, from the base station, information related to a cell that generates the handover time.

[0340] According to any one of Items 1 to 5, a technique is provided that can appropriately handover a band used in uplink transmission in a wireless communication system. According to Supplementary Note Item 2, capability information indicating a handover time can be reported in various units. According to Supplementary Note Item 3, information related to a handover time can be set in various units.

[0341] <Supplementary Note 6>

[0342] (Supplementary Note Item 1)

[0343] A terminal includes: a transmitting unit that reports, to a base station, capability information indicating whether simultaneous transmission is possible between bands in a transmission handover mode in which at least one antenna port among a plurality of antenna ports can handover bands across two or more bands and can handover a band for transmission across a total of three or more bands among a plurality of antenna ports; and a receiving unit that receives, from the base station, information related to a cell in which simultaneous transmission is possible.

[0344] (Supplementary Note Item 2)

[0345] The terminal according to Supplementary Note Item 1, wherein the transmitting unit reports the capability information indicating whether simultaneous transmission is possible to the base station for each combination of handover bands within a band combination, for each band, for each combination of all bands within a band combination, or for all supported band combinations.

[0346] (Supplementary Note Item 3)

[0347] The terminal according to item 1 or 2 of the appended note, wherein the receiving unit receives information related to cells that can perform simultaneous transmission for each combination of serving cells, each serving cell, or each cell group.

[0348] (Item 4 of the appended note)

[0349] A base station includes: a receiving unit that receives, from a terminal, capability information indicating whether simultaneous transmission is possible between bands in a transmission switching mode in which at least one antenna port among a plurality of antenna ports of the terminal can switch bands across two or more bands and can switch the bands used for transmission across a total of three or more bands among the plurality of antenna ports; and a transmitting unit that transmits, to the terminal, information related to cells that can perform simultaneous transmission.

[0350] (Item 5 of the appended note)

[0351] A communication method is executed by a terminal. The terminal reports, to a base station, capability information indicating whether simultaneous transmission is possible between bands in a transmission switching mode in which at least one antenna port among a plurality of antenna ports can switch bands across two or more bands and can switch the bands used for transmission across a total of three or more bands among the plurality of antenna ports, and the terminal receives, from the base station, information related to cells that can perform simultaneous transmission.

[0352] According to any one of items 1 to 5, a technique for appropriately switching the band used in uplink transmission in a wireless communication system is provided. According to item 2 of the appended note, the capability information indicating whether simultaneous transmission is possible can be reported in various units. According to item 3 of the appended note, various information related to simultaneous transmission can be set.

[0353] <Appended note 7>

[0354] (Item 1 of the appended note)

[0355] A terminal includes: a control unit that controls uplink transmission using N bands selected from M bands, where M is a natural number of 3 or more and N is a natural number less than or equal to M; and a transmitting unit that performs the uplink transmission to which a first minimum interval or a second minimum interval longer than the first minimum interval is applied for switching between the M bands, and the control unit applies the second minimum interval to a specific uplink transmission.

[0356] (Item 2 of the appended note)

[0357] The terminal according to claim 1, wherein the control unit sets at least any one of the first minimum interval and the second minimum interval based on the subcarrier spacing of the activated bandwidth part of the M bands.

[0358] (Supplementary item 3)

[0359] The terminal according to claim 1, wherein the control unit applies the first minimum interval to all of the uplink transmissions.

[0360] (Supplementary item 4)

[0361] The terminal according to claim 3, wherein the control unit applies the second minimum interval to the uplink transmission when transmitting specific capability information of the terminal.

[0362] (Supplementary item 5)

[0363] A base station, comprising: a receiving unit that performs uplink reception using N bands selected from M bands, where M is a natural number of 3 or more and N is a natural number less than or equal to M; and a control unit that assumes applying a first minimum interval or a second minimum interval longer than the first minimum interval to the uplink reception that switches between the M bands, and the control unit assumes applying the second minimum interval to a specific uplink reception.

[0364] (Supplementary item 6)

[0365] A communication method, comprising the following steps: controlling uplink transmission using N bands selected from M bands, where M is a natural number of 3 or more and N is a natural number less than or equal to M; and performing the uplink transmission to which a first minimum interval or a second minimum interval longer than the first minimum interval is applied to the uplink transmission that switches between the M bands, and in the step of performing the uplink transmission, applying the second minimum interval to a specific uplink transmission.

[0366] (Hardware structure)

[0367] In the description of the above embodiment, the block diagram used ( Figure 21 and Figure 22 ) shows blocks in terms of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, there is no particular limitation on the implementation method of each functional block. That is, each functional block can be implemented using one device physically or logically combined, or two or more physically or logically separated devices can be directly or indirectly (e.g., using wired, wireless, etc.) connected and these multiple devices can be used for implementation. The functional block can also be implemented by combining software in the above one device or the above multiple devices.

[0368] Functions include judgment, decision-making, determination, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, regarded as, broadcasting, notification, communication, forwarding, configuration, reconfiguration, allocation (allocating, mapping), assignment, etc., but are not limited to these. For example, a functional block (structural part) that exhibits a transmission function is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0369] For example, the base station 10, the terminal 20, etc. in an embodiment of the present disclosure can also function as a computer that performs the processing of the wireless communication method of the present disclosure. Figure 23 is a diagram showing an example of the hardware structure of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The above base station 10 and terminal 20 can also be configured as a computer device physically 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.

[0370] In addition, in the following description, the term "device" can be replaced with "circuit", "equipment (device)", "unit", etc. The hardware structure of the base station 10 and the terminal 20 can be configured to include one or more of the devices shown, or can be configured not to include some of the devices.

[0371] Each function in the base station 10 and the terminal 20 is implemented by the following method: A predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs operations and controls at least one of the communication of the communication device 1004 or the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0372] The processor 1001, for example, makes an operating system operate to control the entire computer. The processor 1001 may also be composed of a central processing unit (CPU: Central Processing Unit) including an interface with peripheral devices, a control device, an arithmetic device, registers, etc. For example, the above control unit 140, control unit 240, etc. may also be implemented by the processor 1001.

[0373] In addition, the processor 1001 reads a program (program code), a software module, or data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and performs various processes based on this. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, Figure 21 The control unit 140 of the base station 10 shown can also be implemented by a control program stored in the storage device 1002 and operating in the processor 1001. In addition, for example, Figure 22 The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operating in the processor 1001. Although it has been described that the above various processes are executed by one processor 1001, the above various processes may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may also be implemented by one or more chips. In addition, the program may also be sent from a network via a telecommunication line.

[0374] The storage device 1002 is a computer-readable recording medium and may be composed of at least one of, for example, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store a program (program code), a software module, etc. that can be executed to implement the communication method according to an embodiment of the present disclosure.

[0375] The auxiliary storage device 1003 is a computer-readable recording medium, which can be composed of at least one of optical discs such as CD-ROM (Compact Disc ROM), hard disk drives, floppy disks, magneto-optical discs (e.g., compact discs, digital versatile discs, Blu-ray (registered trademark) discs), smart cards, flash memories (e.g., cards, sticks, key drives), Floppy (registered trademark) disks, magnetic strips, etc. The above storage medium can be, for example, a database, a server, and other appropriate media including at least one of the storage device 1002 and the auxiliary storage device 1003.

[0376] The communication device 1004 is hardware (a transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 can also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. to implement at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). For example, a transceiver antenna, an amplifier section, a transceiver section, a transmission path interface, etc. can also be implemented by the communication device 1004. The transceiver section can also be physically or logically separately implemented by a transmission section and a reception section.

[0377] The input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside. The output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. In addition, the input device 1005 and the output device 1006 can also be integrally formed (e.g., a touch panel).

[0378] In addition, each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information. The bus 1007 can be constituted by a single bus or different buses can be used between devices.

[0379] In addition, the base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA), and a part or all of each functional block may also be implemented by such hardware. For example, the processor 1001 may also be implemented using at least one of these hardware components.

[0380] In addition, the terminal 20 or the base station 10 may be provided in the vehicle 2001. Figure 24 A structural example of the vehicle 2001 is shown. As Figure 24 shown, the vehicle 2001 includes a driving unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. Each form / embodiment described in the present disclosure may also be applied to the communication device mounted on the vehicle 2001, for example, it may also be applied to the communication module 2013. The functions of the terminal 20 may also be mounted on the communication module 2013.

[0381] The driving 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 disk), 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.

[0382] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a 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 referred to as an ECU (Electronic Control Unit).

[0383] As signals from various sensors 2021 to 2029, there are current signals from a current sensor 2021 that senses the current of a motor, rotational speed signals of the front and rear wheels obtained by a rotational speed sensor 2022, air pressure signals of the front and rear wheels obtained by an air pressure sensor 2023, vehicle speed signals obtained by a vehicle speed sensor 2024, acceleration signals obtained by an acceleration sensor 2025, depression amount signals of an accelerator pedal obtained by an accelerator pedal sensor 2029, depression amount signals of a brake pedal obtained by a brake pedal sensor 2026, operation signals of a shift lever obtained by a shift lever sensor 2027, detection signals for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028, and so on.

[0384] The information service unit 2012 is composed of various devices such as a car navigation system, an audio system, speakers, a television, and a radio for providing various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The information service unit 2012 uses information obtained from external devices via a communication module 2013 and the like to provide various multimedia information and multimedia services to the passengers of the vehicle 2001.

[0385] The driving assistance system unit 2030 is composed of various devices such as a millimeter-wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning device for positioning (such as GNSS, etc.), map information (such as a high-definition (HD) map, an autonomous vehicle (AV) map, etc.), a gyroscope system (such as an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor for providing functions to prevent accidents or reduce the driving load of the driver, and one or more ECUs that control these devices. In addition, the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to implement a driving assistance function or an autonomous driving function.

[0386] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via a communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axle 2009, the microprocessor 2031 and the memory (ROM, RAM) 2032, and the sensors 2021 to 29 provided in the vehicle 2001 and the electronic control unit 2010.

[0387] The communication module 2013 can be controlled by the microprocessor 2031 of the electronic control unit 2010 and is a communication device capable of communicating with an external device. For example, various information is transmitted and received with the external device via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. The external device can also be, for example, a base station, a mobile station, etc.

[0388] The communication module 2013 transmits the current signal from the current sensor input to the electronic control unit 2010 to the external device via wireless communication. In addition, the communication module 2013 transmits the rotation speed signals of the front and rear wheels obtained by the rotation speed sensor 2022, the air pressure signals of the front and rear wheels obtained by the air pressure sensor 2023, the vehicle speed signal obtained by the vehicle speed sensor 2024, the acceleration signal obtained by the acceleration sensor 2025, the depression amount signal of the accelerator pedal obtained by the accelerator pedal sensor 2029, the depression amount signal of the brake pedal obtained by the brake pedal sensor 2026, the operation signal of the shift lever obtained by the shift lever sensor 2027, the detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by the object detection sensor 2028, etc. input to the electronic control unit 2010 to the external device via wireless communication.

[0389] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) sent from the external device and displays it on the information service unit 2012 provided in the vehicle 2001. In addition, the communication module 2013 stores the various information received from the external device in the memory 2032 available to the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, the steering unit 2003, the accelerator pedal 2004, the brake pedal 2005, the shift lever 2006, the front wheels 2007, the rear wheels 2008, the axles 2009, the sensors 2021 to 2029, etc. provided in the vehicle 2001 based on the information stored in the memory 2032.

[0390] (Supplement of the embodiment)

[0391] The above has described the embodiments of the present invention. However, the disclosed invention is not limited to such embodiments, and those skilled in the art should understand various variations, modifications, alternatives, substitutions, etc. Specific numerical examples have been used for the purpose of facilitating the understanding of the invention, but these numerical values are only examples as long as not specifically indicated, and any appropriate arbitrary values can be used. The item classification in the above description is not essential for the present invention. The matters described in two or more items can be combined as needed, or the matters described in one item can be applied to the matters described in another item (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. The operations of multiple functional units can be performed by one physical component, or the operation of one functional unit can be performed by multiple physical components. Regarding the processing procedures described in the embodiments, the order of processing can be swapped without contradiction. For the purpose of facilitating the description of the processing, the base station 10 and the terminal 20 are illustrated using functional block diagrams, but such devices can also be implemented by hardware, software, or a combination thereof. The software that operates according to the embodiments of the present invention through the processors of the base station 10 and the software that operates according to the embodiments of the present invention through the processors of the terminal 20 can also be stored in a random access memory (RAM), a flash memory, a read-only memory (ROM), an EPROM, an EEPROM, a register, a hard disk drive (HDD), a removable disk, a CD-ROM, a database, a server, and other appropriate arbitrary storage media, respectively.

[0392] In addition, the notification of information is not limited to the forms / embodiments described in the present disclosure, and other methods can also be used. For example, the notification of information can be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high 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. In addition, the RRC signaling can be referred to as an RRC message. For example, it can also be an RRC connection setup message, an RRC connection reconfiguration message, etc.

[0393] Each form / embodiment described in the present disclosure can also be applied to at least one of systems using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (New Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), other appropriate systems, and next-generation systems extended therefrom. In addition, multiple systems (for example, a combination of at least one of LTE and LTE-A and 5G, etc.) can also be combined and applied.

[0394] For the processing procedures, timings, flows, etc. of each form / embodiment described in this specification, the order can be swapped without contradiction. For example, for the methods described in the present disclosure, the order of illustration indicates the elements of various steps, but is not limited to the specific order indicated.

[0395] In this specification, specific actions performed by the base station 10 may sometimes be performed by its upper node according to circumstances. In a network composed of one or more network nodes having the base station 10, it is obvious that various actions performed for communicating with the terminal 20 can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, MME or S-GW, etc. are considered, but are not limited to these). In the above, the case where there is one other network node other than the base station 10 is illustrated, but the other network nodes can also be a combination of multiple other network nodes (for example, MME and S-GW).

[0396] The information, signals, etc. described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). Input and output can also be performed via multiple network nodes.

[0397] Information such as input or output can be stored in a specific location (e.g., a memory), or can be managed using a management table. Information such as input or output can be rewritten, updated, or appended. Information such as output can also be deleted. Information such as input can also be sent to other devices.

[0398] The determination in the present disclosure can be made by a value represented by 1 bit (0 or 1), can also be made by a Boolean value (true or false), and can also be made by a comparison of numerical values (e.g., comparison with a predetermined value).

[0399] For software, regardless of whether it is called software, firmware, middleware, microcode, hardware description language, or by any other name, it should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc.

[0400] In addition, software, commands, information, etc. can be transmitted and received via a transmission medium. For example, when using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technologies (infrared, microwave, etc.) to send software from a web page, server, or other remote source, at least one of these wired technologies and wireless technologies is included in the definition of the transmission medium.

[0401] The information, signals, etc. described in the present disclosure can also be represented using any one of various different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination of these.

[0402] In addition, for the terms described in the present disclosure and the terms required to understand the present disclosure, they can be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol can also be a signal (signaling). In addition, a signal can also be a message. In addition, a component carrier (CC) can also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0403] The terms "system" and "network" used in the present disclosure can be used interchangeably.

[0404] In addition, the information, parameters, etc. described in this disclosure can be represented using absolute values, relative values with respect to a predetermined value, or other corresponding information. For example, radio resources can be indicated using indices.

[0405] The names used for the above parameters are non-restrictive names in any aspect. Furthermore, the mathematical expressions using these parameters may sometimes be different from the content explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any appropriate names, and thus the various names assigned to these various channels and information elements are non-restrictive names in any aspect.

[0406] In this disclosure, terms such as "base station (BS: Base Station)", "radio base station", "base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", "component carrier", etc. can be used interchangeably. Sometimes, terms such as macro cell, small cell, femto cell, pico cell, etc. are also used to refer to the base station.

[0407] A base station can accommodate one or more (e.g., 3) cells. In the case where a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each of these smaller areas can also be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a part or the whole of the coverage area of at least one of the base station and the base station subsystem that provides communication services within that coverage range.

[0408] In this disclosure, terms such as "mobile station (MS: Mobile Station)", "terminal (user terminal)", "terminal (UE: User Equipment)", "terminal", etc. can be used interchangeably.

[0409] For mobile stations, those skilled in the art sometimes also use the following terms to refer to them: subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients, or some other appropriate terms.

[0410] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., an automobile, an airplane, etc.), a moving body that moves in an unmanned manner (e.g., a drone, a self-driving car, etc.), or a robot (humanoid or non-humanoid). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0411] In addition, the base station in the present disclosure may also be replaced by a terminal. For example, a structure in which the communication between the base station and the terminal is replaced by the communication between multiple terminals 20 (e.g., it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) can also apply various forms / embodiments of the present disclosure. In this case, it may also be configured such that the terminal 20 has the functions of the above-described base station 10. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to terminal-to-terminal communication (e.g., "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0412] Similarly, the terminal in the present disclosure may be replaced by a base station. In this case, it may also be configured such that the base station has the functions of the above-described terminal.

[0413] As used in this disclosure, terms such as "determining" and "deciding" sometimes encompass a variety of actions. For example, "determining" and "deciding" may include deeming a matter that has been judged, calculated, computed, processed, derived, investigated, looked up (e.g., looked up in a table, database, or other data structure), searched (e.g., searched in a table, database, or other data structure), inquired (e.g., inquired in a table, database, or other data structure), ascertained as a matter that has been "determined" or "decided". In addition, "determining" and "deciding" may include deeming a matter that has been received (e.g., received information), transmitted (e.g., transmitted information), input, output, accessed (e.g., accessed data in memory) as a matter that has been "determined" or "decided". In addition, "determining" and "deciding" may include deeming a matter that has been resolved, selected, chosen, established, compared, etc. as a matter that has been "determined" or "decided". That is, "determining" and "deciding" may include deeming certain actions as matters that have been "determined" or "decided". In addition, "determining (deciding)" may also be replaced by "assuming", "expecting", "considering", etc.

[0414] Terms such as "connected" and "coupled" or any variations of these terms are intended to represent all direct or indirect connections or couplings between two or more elements, and may include cases where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The coupling or connection between elements may be a physical coupling or connection, a logical coupling or connection, or a combination of these. For example, "connected" may be replaced by "accessed". In the context of this disclosure, it can be considered that two elements "connect" or "couple" to each other using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-inclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave region, and optical (including both visible and invisible) regions is used to "connect" or "couple" to each other.

[0415] The reference signal can be abbreviated as RS (Reference Signal), or can be called Pilot according to the applied standard.

[0416] In the present disclosure, the description such as "based on" does not mean "only based on" unless otherwise clearly described. In other words, the description such as "based on" means both "only based on" and "at least based on".

[0417] Any reference to the elements using the designations such as "first", "second", etc. used in the present disclosure does not entirely limit the quantity or order of these elements. These designations may be used in the present disclosure as a convenient method for distinguishing between two or more elements. Therefore, the reference to the first element and the second element does not mean that only two elements can be adopted or that the first element must precede the second element in any form.

[0418] The "unit" in the structure of each of the above devices can also be replaced with "section", "circuit", "equipment", etc.

[0419] When the terms "include", "including" and their variants are used in the present disclosure, these terms mean inclusive in the same way as the term "comprising". And, the term "or" used in the present disclosure does not refer to exclusive or.

[0420] The radio frame can be composed of one or more frames in the time domain. In the time domain, each of the one or more frames can be called a subframe. The subframe can also be composed of one or more time slots in the time domain. The subframe can be a fixed time length (e.g., 1 ms) independent of the numerology.

[0421] The numerology can be communication parameters applied to at least one of transmission and reception of a certain signal or channel. The numerology can represent, for example, at least one of subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame structure, specific filtering process performed by the transceiver in the frequency domain, specific windowing process performed by the transceiver in the time domain, etc.

[0422] A time slot can be composed of one or more symbols (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A time slot can be a time unit based on a parameter set.

[0423] A time slot can contain multiple mini-slots. Each mini-slot can be composed of one or more symbols in the time domain. In addition, a mini-slot can also be referred to as a sub-slot. A mini-slot can be composed of fewer symbols than a time slot. The PDSCH (or PUSCH) transmitted in a time unit larger than a mini-slot can be called PDSCH (or PUSCH) mapping type A. The PDSCH (or PUSCH) transmitted using a mini-slot can be called PDSCH (or PUSCH) mapping type B.

[0424] A radio frame, a sub-frame, a time slot, a mini-slot, and a symbol all represent time units when transmitting signals. A radio frame, a sub-frame, a time slot, a mini-slot, and a symbol can be respectively called by corresponding other names.

[0425] For example, 1 sub-frame can be called a transmission time interval (TTI: Transmission Time Interval), multiple consecutive sub-frames can also be called a TTI, and 1 time slot or 1 mini-slot can also be called a TTI. That is to say, at least one of the sub-frame and the TTI can be the sub-frame (1 ms) in the existing LTE, or a period shorter than 1 ms (for example, 1 - 13 symbols), or a period longer than 1 ms. In addition, the unit representing the TTI can not be called a sub-frame, but can be called a time slot, a mini-slot, etc. Moreover, 1 time slot can also be called a unit time. The unit time can vary according to the parameter set for each cell.

[0426] Here, the TTI is, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate wireless resources (such as the bandwidth that can be used in each terminal 20, the transmission power, etc.) to each terminal 20 in units of TTI. In addition, the definition of the TTI is not limited to this.

[0427] The TTI can be the transmission time unit for data packets (transport blocks), code blocks, codewords, etc. after channel coding, or the processing unit for scheduling, link adaptation, etc. In addition, when the TTI is given, the actual time interval (such as the number of symbols) to which the transport block, code block, codeword, etc. are mapped can be shorter than the TTI.

[0428] In addition, when one time slot or one mini time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can be the minimum time unit for scheduling. In addition, the number of time slots (mini time slots) that make up the minimum time unit for scheduling can be controlled.

[0429] A TTI with a time length of 1 ms can also be referred to as a normal TTI (TTI in LTE Rel.8 - 12), a normal TTI, a long TTI, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than the normal TTI can also be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini time slot, a sub - time slot, a time slot, etc.

[0430] In addition, for a long TTI (e.g., a normal TTI, a subframe, etc.), it can be replaced with a TTI having a time length exceeding 1 ms, and for a short TTI (e.g., a shortened TTI, etc.), it can be replaced with a TTI having a TTI length less than that of the long TTI and a TTI length of 1 ms or more.

[0431] A resource block (RB) is a resource allocation unit in the time domain and the frequency domain. In the frequency domain, it can include one or more consecutive subcarriers. The number of subcarriers included in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers included in an RB can also be determined based on the parameter set.

[0432] In addition, the time domain of an RB can include one or more symbols and can be the length of one time slot, one mini time slot, one subframe, or one TTI. One TTI, one subframe, etc. can be composed of one or more resource blocks respectively.

[0433] In addition, one or more RBs can also be referred to as a physical resource block (PRB), a sub - carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.

[0434] In addition, a resource block can be composed of one or more resource elements (RE). For example, one RE can be a radio resource area of one subcarrier and one symbol.

[0435] A bandwidth part (BWP) (which may also be referred to as partial bandwidth, etc.) can also represent a subset of consecutive common resource blocks (RB) used for a certain parameter set in a certain carrier. Herein, the common RB can be determined by the index of the RB based on the common reference point of the carrier. The PRB can be defined in a certain BWP and numbered within that BWP.

[0436] The BWP can include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). One or more BWPs can be set for a UE within one carrier.

[0437] At least one of the set BWPs can be active, and the UE may not assume to transmit and receive a predetermined signal / channel outside the active BWP. In addition, in the present disclosure, "cell", "carrier", etc. can be replaced with "BWP".

[0438] The structures such as the above-mentioned radio frames, subframes, time slots, mini time slots, and symbols are merely illustrative. For example, the number of subframes included in a radio frame, the number of time slots per subframe or radio frame, the number of mini time slots included in a time slot, the number of symbols and RBs included in a time slot or mini time slot, the number of subcarriers included in an RB, and the number of symbols, symbol length, cyclic prefix (CP) length, etc. within a TTI can be changed in various ways.

[0439] In the present disclosure, for example, when articles are added through translation such as a, an, and the in English, the present disclosure also includes the case where the noun following these articles is in the plural form.

[0440] In the present disclosure, the term "A and B are different" can mean "A and B are mutually different". In addition, this term can also mean "A and B are each different from C". Terms such as "separate" and "combine" can be interpreted in the same way as "different".

[0441] Each form / embodiment described in the present disclosure can be used alone, combined, or switched according to execution. In addition, the notification of predetermined information (for example, the notification of "is X") is not limited to being explicitly performed, and can also be implicitly performed (for example, without the notification of the predetermined information).

[0442] As described above, the present disclosure has been described in detail. However, for those skilled in the art, it should be clear that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented in the form of modifications and changes without departing from the gist and scope of the present disclosure determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate, and it has no restrictive meaning for the present disclosure.

[0443] Reference Numeral Explanation

[0444] 10: Base Station

[0445] 110: Transmission Unit

[0446] 120: Reception Unit

[0447] 130: Setting Unit

[0448] 140: Control Unit

[0449] 20: Terminal

[0450] 210: Transmission Unit

[0451] 220: Reception Unit

[0452] 230: Setting Unit

[0453] 240: Control Unit

[0454] 1001: Processor

[0455] 1002: Storage Device

[0456] 1003: Auxiliary Storage Device

[0457] 1004: Communication Device

[0458] 1005: Input Device

[0459] 1006: Output Device

[0460] 2001: Vehicle

[0461] 2002: Driving Unit

[0462] 2003: Steering Unit

[0463] 2004: Accelerator Pedal

[0464] 2005: Brake Pedal

[0465] 2006: Gear Lever

[0466] 2007: Front Wheel

[0467] 2008: Rear Wheel

[0468] 2009: Axle

[0469] 2010: Electronic Control Unit

[0470] 2012: Information Service Department

[0471] 2013: Communication Module

[0472] 2021: Current Sensor

[0473] 2022: Rotational Speed Sensor

[0474] 2023: Air Pressure Sensor

[0475] 2024: Vehicle Speed Sensor

[0476] 2025: Acceleration Sensor

[0477] 2026: Brake Pedal Sensor

[0478] 2027: Gear Shift Lever Sensor

[0479] 2028: Object Detection Sensor

[0480] 2029: Accelerator Pedal Sensor

[0481] 2030: Driving Assistance System Department

[0482] 2031: Microprocessor

[0483] 2032: Memory (ROM, RAM)

[0484] 2033: Communication Port (IO Port)

Claims

1. A terminal, comprising: a control unit that controls uplink transmission using N bands selected from M bands, wherein M is a natural number of 3 or more, and N is a natural number of M or less; and a transmission unit that performs the uplink transmission to which a first minimum interval or a second minimum interval longer than the first minimum interval is applied for the uplink transmission that switches between the M bands, the control unit applies the second minimum interval to a specific one of the uplink transmissions.

2. The terminal according to claim 1, wherein the control unit sets at least any one of the first minimum interval and the second minimum interval based on a subcarrier interval of an active bandwidth part of the M bands.

3. The terminal according to claim 1, wherein the control unit applies the first minimum interval to all of the uplink transmissions.

4. The terminal according to claim 3, wherein the control unit applies the second minimum interval to the uplink transmission when transmitting specific capability information of the terminal.

5. A base station, comprising: a receiving unit that performs uplink reception using N bands selected from M bands, wherein M is a natural number of 3 or more, and N is a natural number of M or less; and a control unit that assumes applying a first minimum interval or a second minimum interval longer than the first minimum interval to the uplink reception that switches between the M bands, the control unit assumes applying the second minimum interval to a specific one of the uplink receptions.

6. A communication method, comprising the following steps: controlling uplink transmission using N bands selected from M bands, wherein M is a natural number of 3 or more, and N is a natural number of M or less; and performing the uplink transmission to which a first minimum interval or a second minimum interval longer than the first minimum interval is applied for the uplink transmission that switches between the M bands, in the step of performing the uplink transmission, applying the second minimum interval to a specific one of the uplink transmissions.

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