Terminals, base stations, and communication methods

Abstract

This terminal comprises: a transmission unit that transmits an uplink on each of a first port and a second port; and a control unit that determines control for the case of performing uplink transmission with no associated downlink configured in at least one of the first port and the second port.

Description

Technical Field

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

Background Art

[0002] In NR (New Radio, also referred to as "5G"), which is a successor system to LTE (Long Term Evolution), technologies that satisfy requirements such as a large-capacity system, high-speed data transmission rate, low latency, simultaneous connection of a large number of terminals, low cost, and power saving are being studied (for example, Non-Patent Document 1).

[0003] Furthermore, studies on 6G as a next-generation wireless communication scheme following 5G have begun, and realization of wireless quality exceeding that of 5G is expected. For example, in 6G, studies are being advanced toward realizing further capacity expansion, use of new frequency bands, further latency reduction, further high reliability, further power consumption reduction, and coverage expansion in new areas (high altitude, sea, space) through non-terrestrial networks (for example, Non-Patent Document 2).

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

Non-Patent Document 2

Summary of Invention

Problems to be Solved by the Invention

[0005] Studies are underway to enhance uplink transmission in multi-carrier environments. For example, a terminal that supports up to two simultaneous transmissions is being considered to dynamically switch the uplink band across three or four bands. This scenario assumes that the band switch may occur for an uplink where no corresponding downlink is configured.

[0006] The present invention has been made in view of the above points, and aims to suitably switch the band on which the uplink is transmitted in a wireless communication system. [Means for solving the problem]

[0007] According to the disclosed technology, the first port and the second port respectively And in the uplink carrier Link base station The transmitting unit that sends the message, In a downlink carrier, a receiving unit that receives the downlink from the base station, an uplink carrier to which the associated downlink carrier is not set, and the switching of uplink transmission at the first or second port between the uplink carrier to which the associated downlink carrier is not set, the switching of uplink transmission at the first or second port between the uplink carrier to which the associated downlink carrier is set and an uplink carrier to which the associated downlink carrier is not set, and the switching of uplink transmission at the first or second port between the uplink carrier to which the associated downlink carrier is set and an uplink carrier to which the associated downlink carrier is set, apply different switching times to the uplink transmission between the uplink carrier to which the associated downlink carrier is set and an uplink carrier to which the associated downlink carrier is set. A terminal having a control unit is provided. [Effects of the Invention]

[0008] According to the disclosed technology, a wireless communication system can suitably switch the band on which the uplink is transmitted. [Brief explanation of the drawing]

[0009] [Figure 1] This figure shows an example configuration (1) of a wireless communication system according to an embodiment of the present invention. [Figure 2] This figure shows an example configuration (2) of a wireless communication system in an embodiment of the present invention. [Figure 3] This figure shows an example (1) of band switching in an embodiment of the present invention. [Figure 4] This figure shows an example (2) of band switching in an embodiment of the present invention. [Figure 5] This figure shows an example (3) of band switching in an embodiment of the present invention. [Figure 6] This figure shows an example (4) of band switching in an embodiment of the present invention. [Figure 7] This is a flowchart illustrating an example (5) of band switching in an embodiment of the present invention. [Figure 8] This is a flowchart illustrating an example (6) of band switching in an embodiment of the present invention. [Figure 9] This figure shows an example of the functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 10] This figure shows an example of the functional configuration of terminal 20 according to an embodiment of the present invention. [Figure 11] This figure shows an example of the hardware configuration of a base station 10 or terminal 20 according to an embodiment of the present invention. [Figure 12] This figure shows an example of the configuration of a vehicle 2001 in an embodiment of the present invention. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings. Note that the embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to those described below.

[0011] In the operation of the wireless communication system according to the embodiments of the present invention, existing technologies may be used as appropriate. However, such existing technologies include, for example, existing LTE, but are not limited to existing LTE. Furthermore, the term "LTE" as used herein has a broad meaning that includes LTE-Advanced and LTE-Advanced and later methods (e.g., NR), unless otherwise specified.

[0012] Further, 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) that are used in existing LTE will be used. This is for the convenience of description, and signals, functions, and the like equivalent to these may be referred to by other names. Further, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, and the like. However, even for signals used in NR, the expression "NR-" is not necessarily explicitly specified.

[0013] Further, in the embodiments of the present invention, the Duplex scheme may be a TDD (Time Division Duplex) scheme, an FDD (Frequency Division Duplex) scheme, or another scheme (for example, Flexible Duplex or the like).

[0014] Further, in the embodiments of the present invention, that a radio parameter or the like is "Configured" may mean that a predetermined value is pre-configured, or may mean that a radio parameter notified from the base station 10 or the terminal 20 is configured.

[0015] Figure 1 is a diagram showing Configuration Example (1) of a radio communication system according to an embodiment of the present invention. As shown in Figure 1, the radio communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although one base station 10 and one terminal 20 are illustrated in Figure 1, this is an example, and a plurality of each may be provided.

[0016] The base station 10 is a communication apparatus that provides one or more cells and performs wireless communication with the terminal 20. Physical resources of a radio signal are defined in a time domain and a frequency domain, the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, on NR-PBCH, and is also referred to as broadcast information. The synchronization signal and the system information may be referred to as an SSB (SS / PBCH block). As shown in FIG. 1, the base station 10 transmits a control signal or data to the terminal 20 on DL (Downlink), and receives a control signal or data from the terminal 20 on UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Further, both the base station 10 and the terminal 20 can apply communication by MIMO (Multiple Input Multiple Output) to DL or UL. Further, both the base station 10 and the terminal 20 may perform communication via a Secondary Cell (SCell) and a Primary Cell (PCell) by CA (Carrier Aggregation). Further, the terminal 20 may perform communication via a primary cell of the base station 10 and a Primary SCG Cell (PSCell) of another base station 10 by DC (Dual Connectivity).

[0017] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. As shown in Figure 1, Terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. Terminal 20 also receives various reference signals transmitted from the base station 10 and performs propagation path quality measurements based on the reception results of these reference signals.

[0018] Terminal 20 is capable of performing carrier aggregation, which involves bundling multiple cells (multiple CCs (Component Carriers)) together to communicate with base station 10. Carrier aggregation uses one PCell (Primary cell) and one or more SCells (Secondary cells). In addition, a PUCCH-SCell with a PUCCH may be used.

[0019] Figure 2 shows an example (2) of a wireless communication system according to an embodiment of the present invention. Figure 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is performed. As shown in Figure 2, a base station 10A that will be an MN (Master Node) and a base station 10B that will be an SN (Secondary Node) are provided. Base stations 10A and 10B are each connected to the core network. Terminal 20 can communicate with both base station 10A and base station 10B.

[0020] A cell group provided by base station 10A, which is the MN (Mobile Network Unit), is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is the SN (Stationary Network Unit), is called an SCG (Secondary Cell Group). In a data center, an MCG consists of one PCell and one or more SCells, and an SCG consists of one PSCell (Primary SCG Cell) and one or more SCells.

[0021] The processing operations in this embodiment may be performed using the system configuration shown in Figure 1, the system configuration shown in Figure 2, or any other system configuration.

[0022] Figure 3 shows an example of band switching (1) in an embodiment of the present invention. Studies are being conducted to enhance UL transmission in multi-carrier environments. As shown in Figure 3, a terminal that supports up to two simultaneous transmissions in FR1 (Frequency Range 1) is being considered to dynamically switch the band on which it transmits UL across three or four bands. In the example in Figure 3, each of the two ports can switch between using bands A, B, C, and D.

[0023] Furthermore, dynamic UL transmit carrier switching operations between bands in single TAG (Timing Advance Group) and multiple TAG environments are also being considered. For example, when communicating with non-collocated cells, it is assumed that different TAGs will be set for each cell. Here, it is assumed that band switching will be performed on an uplink where no paired downlink is set. For example, as shown in Figure 3, when 2 DL carriers are set and 4 UL carriers that can be switched by UL transmit switching are set, it is assumed that 2 of these UL carriers do not have paired DL carriers set. Hereafter, UL carriers without a paired DL carrier will be referred to as "UL carrier (no DL carrier)", and UL carriers with a paired DL carrier will be referred to as "UL carrier (with DL carrier)".

[0024] Therefore, the terminal 20 or base station 10 may implement one of the following options 1) to 6).

[0025] Option 1) When a UL carrier (without a DL carrier) is configured, it may be specified which TAG it belongs to (e.g., TAG-ID), or it may be specified which DL carrier or UL carrier it is associated with or corresponds to.

[0026] Option 2) The tags to which a UL carrier (without a DL carrier) can belong may be limited to PTAGs (Primary Tags) only.

[0027] Option 3) UL transmission switching between UL carriers (without DL carriers), UL transmission switching between UL carriers (with DL carriers) and UL carriers (without DL carriers), and UL transmission switching between UL carriers (with DL carriers) and UL carriers (with DL carriers) may be treated as different cases, and different switching times and requirements may be specified or notified.

[0028] Option 4) In a given UL transmission combination, when transmission on a certain band is instructed, the port to be switched to may be selected based on whether the source and destination are UL carriers (without DL carriers) or UL carriers (with DL carriers), respectively.

[0029] Option 5) In a given UL transmission combination, if one port transmission is instructed on a certain band and only one port is switched to UL transmission, and the destination port is a UL carrier (without DL carrier), the switch may be performed so that the other port becomes a UL carrier (with DL carrier).

[0030] Option 6) UE capabilities may be defined indicating whether or not they support UL transmission switching between UL carrier (without DL carrier) and UL carrier (without DL carrier), UL transmission switching between UL carrier (with DL carrier) and UL carrier (with DL carrier), and UL transmission switching between UL carrier (with DL carrier) and UL carrier (without DL carrier).

[0031] The following describes option 1) above. When a UL carrier (without a DL carrier) is configured, it may be specified which TAG it belongs to (e.g., TAG-ID), or it may be specified which UL carrier or DL ​​carrier it is associated with or corresponds to.

[0032] Figure 4 shows an example (2) of band switching in an embodiment of the present invention. For example, as shown in Figure 4, when switching or setting UL transmission to band C or band D, which does not have a DL carrier set, terminal 20 may notify base station 10 of the TAG-ID. Alternatively, as shown in Figure 4, when switching or setting UL transmission to band C or band D, which does not have a DL carrier set, terminal 20 may notify base station 10 of band A as the associated or corresponding DL carrier or UL carrier. Based on this notification, base station 10 or terminal 20 may indirectly interpret that band C belongs to the TAG to which band A belongs.

[0033] The following explains option 2) above. The tags to which a UL carrier (without a DL carrier) can belong may be limited to PTAGs (Primary Tags) only.

[0034] Figure 5 shows an example (3) of band switching in an embodiment of the present invention. For example, when a UL carrier (without DL carrier) is switched to or a UL carrier (without DL carrier) is set, the TAG-ID, which is a PTAG, may be automatically set to the UL carrier (without DL carrier). That is, the UL carrier (without DL carrier) may belong to the PTAG. Also, only TAG-IDs that are PTAGs may be set, or when setting a DL carrier or UL carrier associated with or corresponding to a UL carrier (without DL carrier), only DL carriers or UL carriers belonging to the PTAG may be set.

[0035] The following describes option 3) above. UL transmission switching between UL carriers (without DL carriers), UL transmission switching between UL carriers (with DL carriers) and UL carriers (without DL carriers), and UL transmission switching between UL carriers (with DL carriers) and UL carriers (with DL carriers) may be treated as different cases, and different switching times and requirements may be specified or notified.

[0036] Figure 6 shows an example (4) of band switching in an embodiment of the present invention. In Figure 6, bands A and B are set to UL carriers (with DL carriers), and bands C and D are set to UL carriers (without DL carriers). For example, UE capabilities related to different switching times may be defined and reported from terminal 20 to the network for UL transmission switching between UL carriers (without DL carriers) and UL carriers (without DL carriers), between UL carriers (with DL carriers) and UL carriers (without DL carriers), and between UL carriers (with DL carriers) and UL carriers (with DL carriers), or settings related to different switching times may be notified from the network.

[0037] For example, for UL transmission switching between UL carrier (without DL carrier) and UL carrier (without DL carrier), between UL carrier (with DL carrier) and UL carrier (without DL carrier), and between UL carrier (with DL carrier) and UL carrier (with DL carrier), the UE capabilities for different transmission method options (e.g., switching UL or dual UL) may be defined and reported from terminal 20 to the network, or the network may notify the settings for each of the different transmission methods. Dual UL may mean simultaneous transmission of 2 ULs.

[0038] The UL transmission switching time may include, for example, one or more of the following 1)-3):

[0039] 1) Length of the transition period 2) Time mask, which is a requirement for RF 3) UL interruption and DL interruption, which are requirements of RRM.

[0040] The following describes option 4) above. Figure 7 is a flowchart illustrating an example of band switching (5) in an embodiment of the present invention. In step S11, terminal 20 performs UL transmission on two ports in a certain band combination. In the following step S12, base station 10 sends an instruction to terminal 20 to perform UL transmission in a certain band. In the following step S13, terminal 20 determines the port to switch based on whether the source and destination are UL carriers (with DL carrier) or UL carriers (without DL carrier).

[0041] For example, if one port transmits as a UL carrier (without DL carrier) and the other port transmits as a UL carrier (with DL carrier), and a switch to UL carrier (without DL carrier) is instructed, the port transmitting as a UL carrier (without DL carrier) or associated with a UL carrier (without DL carrier) may be selected as the port to which the transmission is switched.

[0042] For example, in the configuration shown in Figure 6, when port 1 transmits on band A and port 2 transmits on band D, if a single-port transmission on band C is instructed, port 2 may be selected as the port to switch, and the transmission on port 2 may be switched from band D to band C.

[0043] Furthermore, for example, if one port transmits as a UL carrier (without a DL carrier) and the other port transmits as a UL carrier (with a DL carrier), and a switch to a UL carrier (with a DL carrier) is instructed, the port transmitting as a UL carrier (with a DL carrier) or a port associated with a UL carrier (with a DL carrier) may be selected as the port to which the transmission is switched.

[0044] For example, in the configuration shown in Figure 6, when port 1 transmits on band A and port 2 transmits on band D, if a single-port transmission on band B is instructed, port 1 may be selected as the port to switch, and the transmission on port 1 may be switched from band A to band B.

[0045] Furthermore, for example, a port may be configured to prioritize switching to a port or associated port that transmits a UL carrier (without a DL carrier) over a port or associated port that transmits a UL carrier (with a DL carrier).

[0046] For example, in the configuration shown in Figure 6, when port 1 transmits on band A and port 2 transmits on band D, if a single-port transmission on band B is instructed, port 2 may be selected as the port to switch, and the transmission on port 2 may be switched from band D to band B.

[0047] The following describes option 5) above. Figure 8 is a flowchart illustrating an example of band switching (6) in an embodiment of the present invention. In step S21, terminal 20 performs UL transmission on two ports in a certain band combination. In the following step S22, base station 10 sends an instruction to terminal 20 to perform UL transmission on one port in a certain band. In the following step S23, terminal 20 performs the transmission switching of the instructed one port. In the following step S24, if the switching destination is a UL carrier (without DL carrier), terminal 20 switches the other port to become a UL carrier (with DL carrier).

[0048] For example, if one port transmits a UL carrier (without a DL carrier) and the other port transmits a UL carrier (with a DL carrier), and you are instructed to switch the port transmitting the UL carrier (with a DL carrier) or the port associated with the UL carrier (with a DL carrier) to a UL carrier (without a DL carrier), you may switch the port transmitting the UL carrier (without a DL carrier) or the port associated with the UL carrier (without a DL carrier) to a UL carrier (with a DL carrier).

[0049] For example, in the configuration shown in Figure 6, if port 1 transmits on band A and port 2 transmits on band D, and an instruction is given to switch the transmission of port 1 from band A to band C, the transmission of port 2 may be switched from band D to band A or band B.

[0050] The following describes option 6) above. UE capability may be defined indicating whether or not it supports UL transmission switching between UL carriers (without DL carriers) and UL carriers (without DL carriers), UL transmission switching between UL carriers (with DL carriers) and UL carriers (with DL carriers), and UL transmission switching between UL carriers (with DL carriers) and UL carriers (without DL carriers). This UE capability may be band-specific or band-combination-specific. Furthermore, based on the UE capability reported from terminal 20 to base station 10, base station 10 or terminal 20 may decide which of options 1) to 5) above to implement.

[0051] In the embodiments described above, the band may be interpreted as the carrier. Also, UL in the embodiments described above may be SUL (Supplementary Uplink) or non-SUL (non-SUL). Furthermore, the combination of UL transmissions in the embodiments described above may be any combination of SUL and SUL, SUL and non-SUL, or non-SUL and non-SUL.

[0052] In the above-described embodiment, we mainly explained an example where port 1 selects from 4 carriers and port 2 also selects from 4 carriers. However, the embodiment is not limited to this, and may be applied to cases with different numbers of carriers, such as when port 1 selects from 2 carriers and port 2 selects from 2 carriers, when port 1 selects from 1 carrier and port 2 selects from 3 carriers, or when port 1 selects from 3 carriers and port 2 selects from 1 carrier.

[0053] In the above-described embodiment, we mainly explained an example in which TAG1 contains 2 cells and TAG2 contains 2 cells. However, the embodiment is not limited to this, and may be applied to cases in which TAGs are set, such as the case in which TAG1 contains 1 cell and TAG2 contains 3 cells, the case in which TAG1 contains 3 cells and TAG2 contains 1 cell, and the case in which TAG1 contains 1 cell, TAG2 contains 3 cells and TAG3 contains 2 cells.

[0054] In the above-described embodiment, the example of 2-port transmission (total 2UL transmission) was mainly explained, but it is not limited to this, and the above embodiment may also be applied to cases where different numbers of ports are set, such as 1-port transmission (total 1UL transmission), 3-port transmission (total 3UL transmission), 4-port transmission (total 4UL transmission), or even transmission of a large number of ports. stomach.

[0055] In the embodiment described above, when the base station 10 and terminal 20 are transmitting on two uplinks, they can switch the band on which to transmit uplinks, including uplinks for which no associated downlink has been set as the switching destination.

[0056] In other words, in a wireless communication system, the band used to transmit the uplink can be suitably switched.

[0057] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10 and terminal 20 that perform the processes and operations described above. The base station 10 and terminal 20 include functions to implement the embodiments described above. However, the base station 10 and terminal 20 may each have only some of the functions in the embodiments.

[0058] <Base station 10> Figure 9 shows an example of the functional configuration of a base station 10 in an embodiment of the present invention. As shown in Figure 9, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Figure 9 is merely an example. The names of the functional categories and functional units can be anything as long as they can perform the operations according to the embodiment of the present invention.

[0059] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitting unit 110 also transmits inter-network node messages to other network nodes. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining information from the received signals, for example, higher layer information. The transmitting unit 110 also has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiving unit 120 also receives inter-network node messages from other network nodes.

[0060] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20. The content of the setting information includes, for example, information related to multi-carrier scheduling.

[0061] The control unit 140 performs control related to multi-carrier scheduling, as described in the embodiment. The signal transmission function of the control unit 140 may be included in the transmission unit 110, and the signal reception function of the control unit 140 may be included in the reception unit 120.

[0062] <Terminal 20> Figure 10 shows an example of the functional configuration of a terminal 20 in an embodiment of the present invention. As shown in Figure 10, the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 10 is merely an example. Any functional classification and functional unit names are acceptable as long as they can perform the operations according to the embodiment of the present invention.

[0063] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and acquires signals from higher layers from the received physical layer signals. The receiving unit 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. For example, the transmitting unit 210 transmits 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 as D2D communication, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other terminals 20.

[0064] The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores pre-configured setting information. The content of the setting information includes, for example, information related to multi-carrier scheduling.

[0065] The control unit 240 performs control related to multi-carrier scheduling, as described in the embodiment. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220.

[0066] (Hardware configuration) The block diagrams (Figures 9 and 10) used in the description of the above embodiments show functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, each functional block may be realized using one device that is physically or logically coupled, or it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one or more devices with software.

[0067] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0068] For example, the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 11 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 according to one embodiment of the present disclosure. The above-mentioned base station 10 and terminal 20 may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0069] In the following explanation, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured without some of the devices.

[0070] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0071] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0072] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 9 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in Figure 10 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0073] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0074] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0075] The communication device 1004 is hardware (transceiver / receiver 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, network controller, network card, communication module, etc. The communication device 1004 may include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0076] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0077] Furthermore, each device, such as the processor 1001 and the storage device 1002, is connected by a bus 1007 for communicating information. The bus 1007 may be configured using a single bus, or different buses may be configured for each device.

[0078] Furthermore, the base station 10 and terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0079] Figure 12 shows an example of the configuration of vehicle 2001. As shown in Figure 12, vehicle 2001 comprises a drive 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 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0080] The drive unit 2002 consists 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 called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0081] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0082] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0083] The Information Services Unit 2012 consists of various devices for providing various types of information, such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.

[0084] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0085] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0086] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0087] The communication module 2013 transmits current signals from current sensors input to the electronic control unit 2010 to an external device via wireless communication. The communication module 2013 also transmits, via wireless communication, other signals input to the electronic control unit 2010, including front and rear wheel rotation speed signals obtained by the rotation speed sensor 2022, front and rear wheel air pressure signals obtained by the air pressure sensor 2023, vehicle speed signals obtained by the vehicle speed sensor 2024, acceleration signals obtained by the acceleration sensor 2025, accelerator pedal depression signals obtained by the accelerator pedal sensor 2029, brake pedal depression signals obtained by the brake pedal sensor 2026, shift lever operation signals obtained by the shift lever sensor 2027, and detection signals obtained by the object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0088] The communication module 2013 receives various information (traffic information, signal information, distance information, etc.) transmitted from an external device and displays it on the information service unit 2012 installed in the vehicle 2001. The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., installed in the vehicle 2001.

[0089] (Summary of the embodiments) As described above, according to an embodiment of the present invention, a terminal is provided having a transmission unit that transmits an uplink at a first port and a second port, and a control unit that determines the control when transmitting an uplink at at least one of the first port and the second port for which no associated downlink is set.

[0090] With the above configuration, when the base station 10 and terminal 20 are transmitting two uplinks, they can switch the band on which to transmit uplinks, including uplinks for which no associated downlink has been set as the switching destination. In other words, the band on which to transmit uplinks can be suitably switched in a wireless communication system.

[0091] When the control unit transmits an uplink for which no associated downlink has been set at the first port or the second port, it may notify the base station which TAG (Timing Advance Group) the uplink for which no associated downlink has been set belongs. With this configuration, when the base station 10 and terminal 20 are transmitting two uplinks, they can switch the band to which they transmit uplinks, including uplinks for which no associated downlink has been set as the switching destination.

[0092] The control unit may assume that the uplink without an associated downlink belongs to the primary TAG when transmitting an uplink at the first port or the second port for which no associated downlink has been set. With this configuration, when the base station 10 and terminal 20 are transmitting two uplinks, they can switch the band on which to transmit uplinks, including the uplink without an associated downlink as the switching destination.

[0093] The control unit may perform different transmission switching controls for switching uplink transmissions between an uplink without an associated downlink and another uplink without an associated downlink, switching uplink transmissions between an uplink with an associated downlink and another uplink without an associated downlink, and switching uplink transmissions between an uplink with an associated downlink and another uplink with an associated downlink. With this configuration, when the base station 10 and terminal 20 are transmitting on two uplinks, they can switch the band on which to transmit uplinks, including uplinks without an associated downlink as the switching destination.

[0094] The system further includes a receiving unit that receives instructions from the base station to switch the band on which to transmit the uplink. When the control unit switches the band on which to transmit the uplink at the first port or the second port to the band specified by the instruction, it may determine which port to switch the transmission to based on whether the source carrier and the destination carrier are uplinks for which no associated downlink has been set. With this configuration, when the base station 10 and terminal 20 are transmitting two uplinks, they can switch the band on which to transmit the uplink, including uplinks for which no associated downlink has been set as the destination.

[0095] Furthermore, according to an embodiment of the present invention, a base station is provided having a receiving unit that receives an uplink at a first port and a second port, and a control unit that determines the control when receiving an uplink for which no associated downlink is set at at least one of the first port and the second port.

[0096] With the above configuration, when the base station 10 and terminal 20 are transmitting two uplinks, they can switch the band on which to transmit uplinks, including uplinks for which no associated downlink has been set as the switching destination. In other words, the band on which to transmit uplinks can be suitably switched in a wireless communication system.

[0097] Furthermore, according to an embodiment of the present invention, a communication method is provided in which a terminal performs a transmission procedure for transmitting an uplink at a first port and a second port, and a control procedure for determining the control to be used when transmitting an uplink at at least one of the first port and the second port for which no associated downlink is set.

[0098] With the above configuration, when the base station 10 and terminal 20 are transmitting two uplinks, they can switch the band on which to transmit uplinks, including uplinks for which no associated downlink has been set as the switching destination. In other words, the band on which to transmit uplinks can be suitably switched in a wireless communication system.

[0099] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

[0100] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0101] Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), 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)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0102] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0103] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0104] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0105] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0106] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0107] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0108] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0109] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. For example, the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0110] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0111] The terms “system” and “network” as used in this disclosure are interchangeable.

[0112] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0113] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0114] In this disclosure, terms such as "base station (BS)", "wireless base station", "base station equipment", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0115] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0116] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0117] A mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or several other appropriate terms.

[0118] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operation. 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.

[0119] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything)). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0120] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0121] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0122] The terms “connected,” “coupled,” or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0123] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0124] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0125] Any reference to elements using the designations “first,” “second,” etc., as used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0126] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0127] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0128] A wireless frame may consist of one or more frames in the time domain. Each of these frames in the time domain may be called a subframe. A subframe may further consist of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.

[0129] Numerical logic may be communication parameters applied to at least one of the transmission and reception of a signal or channel. Numerical logic may include, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, specific filtering processes performed by the transceiver in the frequency domain, and specific windowing processes performed by the transceiver in the time domain.

[0130] A slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A slot may also be a time unit based on neurology.

[0131] A slot may include multiple minislots. Each minislot may consist of one or more symbols in the time domain. Minislots may also be called subslots. Minislots may consist of fewer symbols than a slot. A PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0132] Wireless frames, subframes, slots, minislots, and symbols all represent units of time when transmitting a signal. Different names may be used for each of these terms.

[0133] For example, one subframe may be called a Transmission Time Interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one mini-slot may be called a TTI. In other words, at least one of a subframe and a TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms. Note that the unit representing the TTI may be called a slot, mini-slot, etc., instead of a subframe.

[0134] Here, TTI refers to, for example, the smallest unit of time for scheduling in wireless communication. For example, in an LTE system, the base station schedules each terminal 20 to allocate wireless resources (such as the frequency bandwidth and transmission power available to each terminal 20) in TTI units. However, the definition of TTI is not limited to this.

[0135] TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, code words, etc., or it may be a processing unit for scheduling, link adaptation, etc. Given a TTI, the actual time interval (e.g., number of symbols) to which the transport block, code block, code word, etc. are mapped may be shorter than the given TTI.

[0136] Furthermore, if one slot or one mini-slot is referred to as TTI, then one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute the minimum time unit of scheduling. In addition, the number of slots (number of mini-slots) that constitute the minimum time unit of scheduling may be controlled.

[0137] A TTI with a time length of 1ms may also be called a normal TTI, long TTI, normal subframe, long subframe, slot, etc. A TTI shorter than a normal TTI may also be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, mini slot, sub slot, slot, etc.

[0138] Furthermore, long TTIs (e.g., normal TTIs, subframes, etc.) may be interpreted as TTIs with a time length exceeding 1 ms, and short TTIs (e.g., shortened TTIs, etc.) may be interpreted as TTIs with a TTI length less than that of a long TTI but 1 ms or more.

[0139] A resource block (RB) is a resource allocation unit in the time domain and frequency domain, and in the frequency domain, it may contain one or more consecutive subcarriers. The number of subcarriers in an RB may be the same regardless of the neurology, for example, 12. The number of subcarriers in an RB may be determined based on the neurology.

[0140] Furthermore, the time domain of RB may contain one or more symbols and may be the length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc., may each consist of one or more resource blocks.

[0141] One or more RBs may also be called a Physical RB (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB pair, etc.

[0142] Furthermore, a resource block may consist of one or more resource elements (REs). For example, one RE may be a radio resource area comprising one subcarrier and one symbol.

[0143] A Bandwidth Part (BWP), also known as a partial bandwidth, may represent a subset of consecutive common resource blocks (RBs) for a particular neurology system in a given carrier. These common RBs may be identified by an index of the RBs relative to a common reference point of the carrier. A Bandwidth Part (PRB) may be defined and numbered within a given BWP.

[0144] A BWP may include BWPs for UL (UL BWP) and BWPs for DL ​​(DL BWP). One or more BWPs may be configured within a single carrier for a UE.

[0145] At least one of the configured BWPs may be active, and the UE does not need to assume that it will send or receive a given signal / channel outside of the active BWP. In this disclosure, terms such as "cell" and "carrier" may be read as "BWP".

[0146] The structures described above, such as wireless frames, subframes, slots, minislots, and symbols, are merely illustrative. For example, the number of subframes included in a wireless frame, the number of slots per subframe or wireless frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, and the number of symbols, symbol length, and cyclic prefix (CP) length within a TTI can be varied in various ways.

[0147] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0148] In this disclosure, the term "A and B are different" may mean "A and B are different from each other." The term may also mean "A and B are each different from C." Terms such as "separate" and "combine" may be interpreted similarly to "different."

[0149] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0150] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way. [Explanation of Symbols]

[0151] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. Each of the first and second ports includes a transmitting unit that transmits the uplink to the base station on the uplink carrier, A receiving unit that receives the downlink from the base station in the downlink carrier, Switching of uplink transmission at the first port or the second port between an uplink carrier for which no associated downlink carrier is set and an uplink carrier for which no associated downlink carrier is set, Switching of uplink transmission at the first port or the second port between an uplink carrier for which the associated downlink carrier is set and an uplink carrier for which the associated downlink carrier is not set, A terminal having a control unit that applies different switching times to the switching of uplink transmission between an uplink carrier on which the associated downlink carrier is set and the uplink carrier on which the associated downlink carrier is set.

2. The terminal according to claim 1, wherein the control unit transmits an uplink on an uplink carrier for which no associated downlink carrier has been set at the first port or the second port, and notifies the base station of which TAG (Timing Advance Group) the uplink carrier for which no associated downlink carrier has been set belongs.

3. The terminal according to claim 1, wherein when the control unit transmits an uplink on an uplink carrier for which no associated downlink carrier is set at the first port or the second port, it assumes that the uplink carrier for which no associated downlink carrier is set belongs to the primary TAG.

4. The receiving unit receives an instruction from the base station to switch the uplink carrier that transmits the uplink, The terminal according to claim 1, wherein when the control unit switches an uplink carrier that transmits an uplink at the first port or the second port to an uplink carrier specified by the instruction, it determines the port to which the transmission will be switched based on whether the carrier from which the transmission is switched and the carrier to which the transmission is switched according to the instruction are uplink carriers to which no associated downlink carrier is set.

5. In the first port and the second port, a receiving unit is provided that receives the uplink from the terminal on the uplink carrier. A downlink carrier includes a transmission unit that transmits the downlink to the terminal, Switching of uplink reception at the first port or the second port between an uplink carrier for which no associated downlink carrier is set and an uplink carrier for which no associated downlink carrier is set, Switching of uplink reception at the first port or the second port between an uplink carrier for which the associated downlink carrier is set and an uplink carrier for which the associated downlink carrier is not set, A base station having a control unit that applies different switching times to the switching of uplink reception between an uplink carrier on which the associated downlink carrier is set and the uplink carrier on which the associated downlink carrier is set.

6. The procedure for transmitting the uplink to the base station on the uplink carrier at the first port and the second port, A procedure for receiving a downlink from the base station in a downlink carrier, Switching of uplink transmission at the first port or the second port between an uplink carrier for which no associated downlink carrier is set and an uplink carrier for which no associated downlink carrier is set, Switching of uplink transmission at the first port or the second port between an uplink carrier for which the associated downlink carrier is set and an uplink carrier for which the associated downlink carrier is not set, A communication method in which a terminal performs a procedure to apply different switching times to the switching of uplink transmission between the uplink carrier on which the associated downlink carrier is configured and the uplink carrier on which the associated downlink carrier is configured.

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