WO2024201816A1 - 端末、基地局及び通信方法 - Google Patents
端末、基地局及び通信方法 Download PDFInfo
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- WO2024201816A1 WO2024201816A1 PCT/JP2023/012902 JP2023012902W WO2024201816A1 WO 2024201816 A1 WO2024201816 A1 WO 2024201816A1 JP 2023012902 W JP2023012902 W JP 2023012902W WO 2024201816 A1 WO2024201816 A1 WO 2024201816A1
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- terminal
- base station
- switching
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- band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- the present invention relates to a terminal, a base station, and a communication method in a wireless communication system.
- Non-Patent Document 1 For NR (New Radio) (also known as “5G”), the successor system to LTE (Long Term Evolution), technologies are being considered that meet the requirements of a large-capacity system, high data transmission speed, low latency, simultaneous connection of many terminals, low cost, and low power consumption (for example, Non-Patent Document 1).
- uplink transmission can be performed using two antennas simultaneously: an antenna that can use only one band, and an antenna that can switch between two bands.
- uplink transmission can be performed using two antennas that can switch between two bands simultaneously.
- 3GPP Release 18 it is considered that, with regard to the switching time for uplink transmission switching, the terminal will report the switching time for uplink transmission switching in each of Release 16 and Release 17 to the base station.
- the procedure for configuring uplink transmission switching is not defined in 3GPP Release 18. Therefore, if the configuration for uplink transmission switching is not configured appropriately, for example, if different uplink transmission switching methods and switching times are configured between the terminal and the base station, uplink transmission switching may not operate correctly.
- the present invention has been made in consideration of the above points, and aims to define a procedure for configuring uplink transmission switching in a wireless communication system.
- the terminal includes: a receiving unit that receives, from a base station, configuration information regarding uplink transmission switching using two antennas that switch between two bands that constitute a band pair;
- the control unit sets the uplink transmission switching method and switching time based on the setting information.
- this embodiment it is possible to define a procedure for configuring uplink transmission switching in a wireless communication system. This allows the uplink transmission switching method and switching time to be appropriately set, allowing the uplink transmission switching to operate correctly.
- FIG. 1 is a diagram showing a configuration example (1) of a wireless communication system.
- FIG. 1 is a diagram showing a configuration example (2) of a wireless communication system.
- FIG. 11 is a diagram illustrating an example of a sequence diagram regarding a reporting process of a switching time according to the present embodiment. 11 is a diagram showing an example of a switching time reported by a terminal in the present embodiment.
- FIG. FIG. 2 is a diagram showing an example of a sequence diagram relating to a setting process related to uplink transmission switching in this embodiment.
- FIG. 4 is a diagram illustrating an example of setting information according to the first embodiment.
- FIG. 13 is a diagram illustrating an example of setting information according to a first modified example of the first embodiment.
- FIG. 11 is a diagram illustrating an example of setting information according to the second embodiment.
- FIG. 13 is a diagram illustrating an example of setting information according to a second modified example of the second embodiment.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to the present embodiment.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the present embodiment.
- FIG. 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to the present embodiment.
- FIG. 2 is a diagram showing an example of the configuration of a vehicle 2001 in this embodiment.
- LTE Long Term Evolution
- NR NR
- 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
- PUSCH Physical Uplink Shared Channel
- the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- another method e.g., Flexible Duplex, etc.
- “configuring" wireless parameters and the like may mean that predetermined values are pre-configured, or that wireless parameters notified from the base station 10 or the terminal 20 are configured.
- FIG. 1 is a diagram showing a configuration example (1) of a wireless communication system in this embodiment.
- the wireless communication system in this embodiment includes a base station 10 and a terminal 20.
- FIG. 1 shows one base station 10 and one terminal 20, this is an example, and there may be multiple of each.
- the base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20.
- the physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain may be defined by the number of subcarriers or 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, for example, transmitted by NR-PBCH and is also called broadcast information.
- the synchronization signal and system information may be called SSB (SS/PBCH block). As shown in FIG.
- the base station 10 transmits a control signal or data to the terminal 20 in DL (Downlink) and receives a control signal or data from the terminal 20 in UL (Uplink). Both the base station 10 and the terminal 20 are capable of transmitting and receiving signals by performing beamforming. In addition, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. In addition, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) using CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 using DC (Dual Connectivity).
- SCell Secondary Cell
- PCell Primary Cell
- CA Carrier Aggregation
- the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10
- the terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or a communication module for M2M (Machine-to-Machine). As shown in FIG. 1, the terminal 20 receives control signals or data from the base station 10 in DL and transmits control signals or data to the base station 10 in UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 also receives various reference signals transmitted from the base station 10, and performs measurement of the propagation path quality based on the reception results of the reference signals.
- M2M Machine-to-Machine
- the terminal 20 is capable of performing carrier aggregation, which bundles multiple cells (multiple CCs (Component Carriers)) together to communicate with the base station 10.
- carrier aggregation one PCell (Primary cell) and one or more SCells (Secondary cells) are used.
- a PUCCH-SCell having a PUCCH may also be used.
- FIG. 2 is a diagram showing an example (2) of a wireless communication system in this embodiment.
- Figure 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is implemented.
- a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided.
- Base station 10A and base station 10B are each connected to a core network.
- Terminal 20 can communicate with both base station 10A and base station 10B.
- the cell group provided by base station 10A which is an MN
- the MCG Master Cell Group
- the cell group provided by base station 10B which is an SN
- the SCG Secondary Cell Group
- the MCG is composed of one PCell and one or more SCells
- the SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.
- the processing operations in this embodiment may be performed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in a system configuration other than these.
- the base station 10 and the terminal 20 perform UL Tx switching (uplink transmission switching, also called UL transmission switching).
- UL Tx switching is a technology that switches the band used for transmission by the UL transmitting antenna.
- UL Tx switching makes it possible to dynamically switch between an operation that uses two antennas to obtain power gain and an operation that uses one antenna at a time to expand the band.
- FIG. 3 is a diagram showing an example of UL Tx switching in 3GPP (registered trademark) Release 16.
- 3GPP registered trademark
- FIG. 3 shows in Figure 3, in UL Tx switching in 3GPP Release 16, switching between two bands is performed in one antenna.
- UL transmission is performed only in band B, and switching between bands is not performed.
- band B In the antenna for transmission #1, UL transmission is performed only in band B, and switching between bands is not performed.
- UL transmission switching is performed between bands A and B.
- this type of UL transmission switching (method) will be referred to as Rel-16 1Tx-2Tx or 1Tx-2Tx switching, etc.
- FIG. 4 shows an example of UL Tx switching in 3GPP Release 17.
- UL Tx switching in 3GPP Release 17 switching between two bands (Band A and Band B) is performed in each of two antennas (Transmission #1 and Transmission #2).
- this type of UL transmission switching (method) will be referred to as Rel-17 2Tx-2Tx or 2Tx-2Tx switching, etc.
- Figure 5 shows an example of UL Tx switching in 3GPP Release 18. As shown in Figure 5, in UL Tx switching in 3GPP Release 18, switching between three or four bands is performed for each of the two antennas (transmit #1 and transmit #2).
- a switching period is set before or after the UL transmission switching is performed for each UL transmission switching (Rel-16 1Tx-2Tx and Rel-17 2Tx-2Tx) shown in Figures 3 and 4.
- the switching period is the period during which the terminal 20 stops UL transmission when switching UL transmission. That is, the terminal 20 reports the switching time for Rel-16 1Tx-2Tx and the switching time for Rel-17 2Tx-2Tx separately to the base station 10.
- the base station 10 can notify the terminal 20 of the setting of whether to perform UL transmission switching for Rel-16 1Tx-2Tx or Rel-17 2Tx-2Tx by RRC configuration. This prevents different uplink transmission switching methods and switching times from being set between the base station 10 and the terminal 20.
- 3GPP Release 18 allows UL transmission switching between up to four bands per antenna, but it is also possible to perform Rel-16 1Tx-2Tx or Rel-17 2Tx-2Tx UL transmission switching using only one or two of the four bands.
- band pairs two bands
- FIG. 6 is a diagram showing an example of a sequence diagram related to a switching time reporting process in this embodiment. The process of each step will be described below.
- Step S101 The terminal 20 executes a setting process for the switching time in UL transmission switching.
- the terminal 20 sets the switching time for each UL transmission switching method (e.g., Rel-16 1Tx-2Tx or Rel-17 2Tx-2Tx), for example.
- Step S102 The terminal 20 reports the terminal capability to the base station 10 by transmitting the information set in step S101 to the base station 10 as information on the terminal capability (UE capability).
- FIG. 7 is a diagram showing an example of a switching time reported by the terminal in this embodiment. As shown in FIG. 7, the terminal 20 can set one of three switching times (n35us, n140us, n210us) for two different UL transmission switching (uplinkTxSwitchingPeriod1T-MoreBands-r18 and uplinkTxSwitchingPeriod2T-MoreBands-r18).
- the two UL transmission switching may correspond to, for example, the above-mentioned Rel-16 1Tx-2Tx and Rel-17 2Tx-2Tx.
- the switching time may also be set for each available band pair (combination of two bands). Return to FIG. 6 for explanation.
- Step S103 The base station 10 executes a setting process for UL transmission switching based on the information on the terminal capabilities received from the terminal 20 in step S102.
- Figure 8 shows an example of a sequence diagram relating to the setting process for uplink transmission switching in this embodiment. The process of each step will be described below.
- Step S104 The base station 10 executes a setting process for setting information related to UL transmission switching. Details regarding the setting information will be described later.
- Step S105 The base station 10 notifies the terminal 20 of the configuration information set in step S104, for example, by transmitting it via RRC Configuration.
- Step S106 The terminal 20 executes a setting process to set the setting information received in step S105.
- the terminal 20 sets an appropriate switching time according to the set UL transmission switching method based on the setting information received in step S105 and the terminal capability related to the switching time reported by the terminal 20 to the base station 10 in the sequence of FIG. 6.
- the terminal 20 also executes UL transmission based on the set UL transmission switching method and switching time.
- FIG. 9 is a diagram showing an example of configuration information in the first embodiment.
- the configuration information shown in FIG. 9 is an example of CellGroupConfig, which is an information element (IE) of the RRC Configuration transmitted from the base station 10 to the terminal 20 in step S105 of FIG. 8.
- CellGroupConfig is an IE for configuring the terminal 20 for each cell group, and includes UplinkTxSwitchingMoreBands-r18, which is a parameter for configuring band pairs in UL transmission switching.
- IE information element
- UplinkTxSwitchingMoreBands-r18 includes uplinkTxSwitchingBandPairList-r18, which is a parameter that defines a list of multiple combinations of two bands (called band pairs) that exist in a maximum of four bands.
- UplinkTxSwitchingBandPairList-r18 includes multiple UplinkTxSwitchBandPairConfig-r18, which are parameters that define band pairs.
- UplinkTxSwitchBandPairConfig-r18 includes parameters bandInfoUL1-r18 and bandInfoUL2-r18 that define the two bands in the band pair, and uplinkTxSwitchingScheme-r18, which is a parameter that defines the UL transmission switching method.
- the UL transmission switching method is Rel-16 1Tx-2Tx and Rel-17 2Tx-2Tx
- the values "1T2T" and "2T2T" are set for uplinkTxSwitchingScheme-r18, respectively.
- a parameter uplinkTxSwitchingBandPairList-r18 that defines a list of band pairs may be defined directly under CellGroupConfig.
- FIG. 10 is a diagram showing an example of the setting information in the first modification of the first embodiment.
- uplinkTxSwitchingScheme-r18 which is a parameter defining the UL transmission switching method, is defined in UplinkTxSwitchingMoreBands-r18, not in UplinkTxSwitchBandPairConfig-r18. That is, in the setting information shown in FIG.
- the setting of the UL transmission switching method is the same for all band pairs in the cell group, not for each band pair.
- the size of the setting information is reduced, thereby reducing the load on the network, and the processing load in the setting process and the transmission and reception of the setting information in the base station 10 and the terminal 20 is also reduced.
- the base station 10 can simultaneously define the parameters for setting the UL transmission switching method, which are set for each band pair shown in FIG. 9, and the parameters for setting the same for all band pairs in the cell group shown in FIG. 10.
- the terminal 20 performs setting based on the defined parameters.
- both parameters are set, for example, for band pairs that can be set by the parameters set for each band pair, the terminal 20 performs setting based on the parameters set for each band pair, and for band pairs that cannot be set, the terminal 20 performs setting based on the parameters set for all band pairs in the cell group.
- the parameters that the terminal 20 preferentially uses for setting may be specified in advance.
- the terminal 20 may also perform the setting by giving top priority to the parameter (uplinkTxSwitching-2T-Mode-r17) used in the existing 3GPP Release 17.
- uplinkTxSwitching-2T-Mode-r17 when uplinkTxSwitching-2T-Mode-r17 is set to enable, the terminal 20 uses the UL transmission switching of 3GPP Release 17 instead of the UL transmission switching of 3GPP Release 16.
- 3GPP Release 18 when uplinkTxSwitching-2T-Mode-r17 is set to enable, the terminal 20 uses the UL transmission switching of 3GPP Release 17 instead of the UL transmission switching of 3GPP Release 16.
- band pairs in UL transmission switching in 3GPP Release 18 that are not defined as band pairs in UL transmission switching in 3GPP Release 17 (for example, band pairs defined in an antenna that can switch between three or more bands)
- settings may be made based on parameters in UL transmission switching in 3GPP Release 18.
- the terminal 20 receives from the base station 10 setting information regarding uplink transmission switching using two antennas that switch between two bands that constitute a band pair, and sets the uplink transmission switching method and switching time based on the received setting information. Furthermore, the terminal 20 can set the uplink transmission switching method and switching time for each band pair or each cell group based on the setting information received from the base station 10. Furthermore, the terminal 20 can set, as the UL transmission switching method, a method of using only one band in the first antenna and switching two bands in the second antenna (Rel-16 1Tx-2Tx), or a method of switching two bands in both the first antenna and the second antenna (Rel-17 2Tx-2Tx), based on the setting information received from the base station 10.
- the base station 10 specifies bands that can be transmitted using two antennas (antenna ports) for two bands constituting a band pair when the UL transmission switching method is UL transmission switching (Rel-16 1Tx-2Tx) of 3GPP Release 16 by RRC Configuration.
- the difference between the first embodiment and the second embodiment is the setting information that the base station 10 transmits to the terminal 20 in step S104 of FIG. 8.
- FIG. 11 is a diagram showing an example of the setting information in the second embodiment. The difference from the setting information shown in FIG.
- UplinkTxSwitchBandPairConfig-r18 which is a parameter that defines a band pair
- uplinkTxSwitchingCarrier1-r18 which is a parameter that specifies a band that can be transmitted using two antennas (antenna ports), when the UL transmission switching method is UL transmission switching (Rel-16 1Tx-2Tx) of 3GPP Release 16, is defined.
- uplinkTxSwitchingCarrier1-r18 specifies band B, which can be transmitted using two antennas (antenna ports), in a band pair of band A and band B, as shown in FIG.
- UplinkTxSwitchingCarrier1-r18 which is a parameter that specifies a band that can be transmitted using two antennas (antenna ports) in the setting information shown in FIG. 11, in UplinkTxSwitchBandPairConfig-r18, for example, the first band in the band pair defined by bandInfoUL1-r18 is implicitly set as a band that can be transmitted using two antennas (antenna ports).
- the second band in the band pair defined by bandInfoUL2-r18 may be implicitly set as a band that can be transmitted using two antennas (antenna ports).
- FIG. 12 is a diagram showing an example of the setting information in the second modification of the second embodiment.
- uplinkTxSwitchingCarrier1Priority-r18 which is a parameter for specifying a band that can be transmitted using two antennas (antenna ports)
- UplinkTxSwitchingMoreBands-r18 is defined in UplinkTxSwitchingMoreBands-r18.
- uplinkTxSwitchingCarrier1Priority-r18 is a list in which bands included in band pairs available in a cell group are arranged in order of priority for setting as a band (expressed as 1Tx) for transmission using one antenna (antenna port). At this time, for example, if the bands are listed in the order of A, B, and C, band A will be the 1Tx band for band pairs (A, B) and (A, C), and band B will be the 1Tx band for band pair (B, C).
- a list can be set in order of priority for setting bands for transmission using two antennas (antenna ports) (represented as 2Tx). For example, if bands are listed in the order of A, B, C, then band A will be the 2Tx band for band pairs (A, B) and (A, C), and band B will be the 2Tx band for band pair (B, C).
- the above embodiment allows the procedure for configuring uplink transmission switching to be defined. This allows the uplink transmission switching method and switching time to be set appropriately, allowing the uplink transmission switching to operate correctly.
- (Section 5) a control unit that sets configuration information related to uplink transmission switching using two antennas that switch between two bands that constitute a band pair; A transmission unit that transmits the setting information to a terminal; A base station having (Section 6) receiving, from a base station, configuration information regarding uplink transmission switching using two antennas for switching between two bands constituting a band pair; setting a method and a switching time of the uplink transmission switching based on the setting information; A communication method performed by a terminal having the above configuration.
- any of the above configurations can define the procedure for configuring uplink transmission switching. This allows the uplink transmission switching method and switching time to be set appropriately, allowing the uplink transmission switching to operate correctly.
- the base station 10 and the terminal 20 include functions for implementing the above-mentioned embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions in the embodiments.
- Fig. 13 is a diagram showing an example of the functional configuration of the base station 10 in this embodiment.
- 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 Fig. 13 is merely an example. As long as the operation according to this embodiment can be executed, the names of the functional divisions and functional units may be any names.
- the transmitting unit 110 has a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
- the transmitting unit 110 also transmits inter-network node messages to other network nodes.
- the receiving unit 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals.
- the transmitting unit 110 also has a 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.
- the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20.
- the contents of the setting information include, for example, information related to UL transmission switching.
- the control unit 140 performs settings or control related to UL transmission switching as described in the embodiment.
- the functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.
- Fig. 14 is a diagram showing an example of the functional configuration of the terminal 20 in this embodiment.
- 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 Fig. 14 is merely an example. As long as the operation according to this embodiment can be executed, the names of the functional divisions and functional units may be any names.
- the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
- the receiver 220 wirelessly receives various signals and acquires higher layer signals from the received physical layer signals.
- the receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, etc. transmitted from the base station 10.
- the transmitter 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc. to another terminal 20 as D2D communication, and the receiver 220 receives PSCCH, PSSCH, PSDCH, PSBCH, etc. from the other terminal 20.
- PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel
- PSDCH Physical Sidelink Discovery Channel
- PSBCH Physical Sidelink Broadcast Channel
- 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 setting information that is set in advance.
- the contents of the setting information include, for example, information related to UL transmission switching.
- the control unit 240 performs settings or control related to UL transmission switching as described in the embodiment.
- 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.
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
- the functional block may be realized by combining the one device or the multiple devices with software.
- Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
- the base station 10, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
- FIG. 15 is a diagram showing an example of the hardware configuration of the base station 10 and terminal 20 in 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.
- the term "apparatus" can be interpreted as a circuit, device, unit, etc.
- the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.
- the functions of the base station 10 and the terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the storage device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- the processor 1001 for example, operates an operating system to control the entire computer.
- the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
- CPU central processing unit
- control unit 140, control unit 240, etc. may be realized by the processor 1001.
- the processor 1001 reads out a program (program code), software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program.
- the program is a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment.
- the control unit 140 of the base station 10 shown in FIG. 13 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
- the control unit 240 of the terminal 20 shown in FIG. 14 may be stored in the storage device 1002 and realized by a control program that runs on the processor 1001.
- the processor 1001 may be implemented by one or more chips.
- the program may be transmitted from a network via a telecommunication line.
- the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of 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 called a register, a cache, a main memory, etc.
- the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
- the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc.
- the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
- the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
- the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).
- each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
- 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), or a field programmable gate array (FPGA), and some or all of the functional blocks may be realized by the hardware.
- the processor 1001 may be implemented using at least one of these pieces of hardware.
- FIG. 16 shows an example configuration of a vehicle 2001.
- the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, 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.
- a communication device mounted on the vehicle 2001 and may be applied to the communication module 2013, for example.
- the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
- the steering unit 2003 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
- the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
- the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
- Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
- 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 (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
- the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
- the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
- input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
- output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
- the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices.
- the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
- the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
- the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided on the vehicle 2001.
- 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 an external device. For example, it transmits and receives various information to and from the external device 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, a mobile station, etc.
- the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
- the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
- the PUSCH transmitted by the communication module 2013 may include information based on the above input.
- the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001.
- the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
- the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
- 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 to 2029, etc. provided in the vehicle 2001.
- the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
- the order of processing may be changed as long as there is no contradiction in the processing procedures described in the embodiment.
- the base station 10 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
- the software operated by the processor possessed by the base station 10 according to this embodiment and the software operated by the processor possessed by the terminal 20 according to this embodiment may each 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 (HDD), a removable disk, a CD-ROM, a database, a server or any other suitable storage medium.
- the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
- the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
- RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- Each aspect/embodiment described in this disclosure is a mobile communication system that is compatible with 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 (x is, for example, an integer or decimal number)), FRA (Future Ra).
- the present invention may be applied to at least one of systems using IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, and next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).
- certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
- various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
- the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
- the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
- the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
- the input and output information may be overwritten, updated, or added to.
- the output information may be deleted.
- the input information may be sent to another device.
- the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
- a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
- the channel and the symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
- system and “network” are used interchangeably.
- a radio resource may be indicated by an index.
- the names used for the parameters described above are not intended to be limiting in any way. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.
- base station BS
- wireless base station base station
- base station device fixed station
- NodeB nodeB
- eNodeB eNodeB
- gNodeB gNodeB
- access point e.g., "transmission point”
- gNodeB gNodeB
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
- a base station can accommodate one or more (e.g., three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
- a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
- MS Mobile Station
- UE User Equipment
- 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 some other suitable terminology.
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc.
- At least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
- the moving object is a movable object, and the moving speed is arbitrary. It also includes the case where the moving object is stopped.
- the moving object includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcar, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
- the moving object may also be a moving object that travels autonomously based on an operation command.
- At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a user terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
- the terminal 20 may be configured to have the functions of the base station 10 described above.
- terms such as "uplink” and "downlink” may be read as terms corresponding to terminal-to-terminal communication (for example, "side").
- the uplink channel, downlink channel, etc. may be read as a side channel.
- the user terminal in this disclosure may be interpreted as a base station.
- the base station may be configured to have the functions of the user terminal described above.
- determining may encompass a wide variety of actions.
- Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
- determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
- judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
- connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between elements may be physical, logical, or a combination thereof.
- “connected” may be read as "access.”
- two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
- the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
- a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- SCS subcarrier spacing
- TTI transmission time interval
- radio frame structure a specific filtering process performed by the transceiver in the frequency domain
- a specific windowing process performed by the transceiver in the time domain etc.
- a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
- a slot may be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
- Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
- one subframe may be called a Transmission Time Interval (TTI)
- TTI Transmission Time Interval
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI.
- at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
- the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
- TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
- a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
- wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
- TTI is not limited to this.
- the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
- the time interval e.g., the number of symbols
- the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum time unit of scheduling.
- the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
- a short TTI e.g., a shortened TTI, etc.
- TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers included in an RB may be determined based on the numerology.
- the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
- PRB physical resource block
- SCG sub-carrier group
- REG resource element group
- PRB pair an RB pair, etc.
- a resource block may be composed of one or more resource elements (REs).
- REs resource elements
- one RE may be a radio resource area of one subcarrier and one symbol.
- a bandwidth part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within the BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean “A and B are each different from C.”
- Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
- notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
- Base station 110 Transmitter 120 Receiver 130 Setting unit 140 Control unit 20 Terminal 210 Transmitter 220 Receiver 230 Setting unit 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 unit 2004 Accelerator pedal 2005 Brake pedal 2006 Shift lever 2007 Front wheel 2008 Rear wheel 2009 Axle 2010 Electronic control unit 2012 Information service unit 2013 Communication module 2021 Current sensor 2022 Rotational speed sensor 2023 Air pressure sensor 2024 Vehicle speed sensor 2025 Acceleration sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object detection sensor 2029 Accelerator pedal sensor 2030 Driving assistance system unit 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)
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Abstract
Description
前記設定情報に基づいて、前記上りリンク送信切替の方法と切替時間を設定する制御部と、を有する。
第1の実施形態について説明する。第1の実施形態によれば、上りリンク送信切替に関する設定を行う手順が明確に定義される。図6は、本実施形態における切替時間の報告処理に関するシーケンス図の一例を示す図である。以下、各ステップの処理を説明する。
第1の実施形態の変形例1について説明する。第1の実施形態の変形例1では、図8のステップS104において基地局10が端末20に送信する設定情報が前述の図9に示した設定情報と異なる。図10は、第1の実施形態の変形例1における設定情報の一例を示す図である。図9に示した設定情報との違いは、UL送信切替の方法を定義するパラメータであるuplinkTxSwitchingScheme-r18が、UplinkTxSwitchBandPairConfig-r18内ではなく、UplinkTxSwitchingMoreBands-r18内に定義されている点である。即ち、図10に示した設定情報では、UL送信切替の方法の設定が、バンドペアごとではなく、セルグループ内の全てのバンドペアに対して同じ設定となる。これにより、図9に示した設定情報と比較して、バンドペアごとの細かい設定はできないが、設定情報のサイズが小さくなることで、ネットワークの負荷が低減され、基地局10及び端末20における設定処理及び設定情報の送受信における処理負荷も低減される。
第1の実施形態の変形例2について説明する。第1の実施形態の変形例2では、基地局10は、UL送信切替の方法を設定するパラメータに関して、図9に示したバンドペアごとに設定するパラメータと図10に示したセルグループ内の全てのバンドペアに対して同じ設定をするパラメータを同時に定義できるものとする。端末20は、一方のパラメータのみが定義されている場合は、定義されているパラメータに基づいて設定を行なう。また、端末20は、両方のパラメータが設定されている場合は、例えば、バンドペアごとに設定するパラメータにより設定が可能なバンドペアに対しては、バンドペアごとに設定するパラメータに基づいて設定を行い、そうでないバンドペアに対しては、セルグループ内の全てのバンドペアに対して設定するパラメータに基づいて設定を行う。或いは、両方のパラメータが設定されている場合に、端末20が優先して設定で用いるパラメータを予め規定しておいてもよい。
第2の実施形態について説明する。第2の実施形態によれば、基地局10は、RRC Configurationによって、UL送信切替の方法が3GPPリリース16のUL送信切替(Rel-16 1Tx-2Tx)である場合に、バンドペアを構成する2つのバンドに対して、2つのアンテナ(アンテナポート)を用いて送信できるバンドを指定する。第1の実施形態と第2の実施形態の違いは、図8のステップS104において基地局10が端末20に送信する設定情報である。図11は、第2の実施形態における設定情報の一例を示す図である。図9に示した設定情報との違いは、バンドペアを定義するパラメータであるUplinkTxSwitchBandPairConfig-r18において、UL送信切替の方法が3GPPリリース16のUL送信切替(Rel-16 1Tx-2Tx)である場合に、2つのアンテナ(アンテナポート)を用いて送信できるバンドを指定するパラメータであるuplinkTxSwitchingCarrier1-r18が定義されている点である。例えば、uplinkTxSwitchingCarrier1-r18は、図3に示すように、バンドAとバンドBのバンドペアにおいて、2つのアンテナ(アンテナポート)を用いて送信できるバンドBを指定する。
第2の実施形態の変形例1について説明する。第2の実施形態の変形例1では、図11に示した設定情報において、2つのアンテナ(アンテナポート)を用いて送信できるバンドを指定するパラメータであるuplinkTxSwitchingCarrier1-r18を定義するのではなく、UplinkTxSwitchBandPairConfig-r18において、例えば、bandInfoUL1-r18により定義されるバンドペアにおける1番目のバンドを暗黙的に2つのアンテナ(アンテナポート)を用いて送信できるバンドであるとする。或いは、bandInfoUL2-r18により定義されるバンドペアにおける2番目のバンドを暗黙的に2つのアンテナ(アンテナポート)を用いて送信できるバンドとしてもよい。
第2の実施形態の変形例2について説明する。第2の実施形態の変形例2では、図12に示した設定情報において、2つのアンテナ(アンテナポート)を用いて送信できるバンドを指定する。図12は、第2の実施形態の変形例2における設定情報の一例を示す図である。図11に示した設定情報との違いは、2つのアンテナ(アンテナポート)を用いて送信できるバンドを指定するためのパラメータであるuplinkTxSwitchingCarrier1Priority-r18がUplinkTxSwitchingMoreBands-r18内に定義されている点である。uplinkTxSwitchingCarrier1Priority-r18は、セルグループ内で利用可能なバンドペアに含まれるバンドを、例えば、1つのアンテナ(アンテナポート)を用いて送信する(1Txと表記)バンドとして設定する優先度が高い順に並べたリストである。このとき、例えば、バンドA、B、Cの順でリスト化されたならば、バンドペア(A、B)と(A、C)に対しては、バンドAが1Txのバンドとなり、バンドペア(B、C)に対しては、バンドBが1Txのバンドとなる。
(第1項)
バンドペアを構成する2つのバンドを切り替える2つのアンテナを用いた上りリンク送信切替に関する設定情報を基地局から受信する受信部と、
前記設定情報に基づいて、前記上りリンク送信切替の方法と切替時間を設定する制御部と、
を有する端末。
(第2項)
前記制御部は、前記設定情報に基づいて、前記バンドペアごと又はセルグループごとに、前記上りリンク送信切替の方法と切替時間を設定する、第1項に記載の端末。
(第3項)
前記制御部は、前記設定情報に基づいて、前記方法として、第1のアンテナでは1つのバンドのみを用いて、第2のアンテナでは2つのバンドを切り替える第1の方法、又は第1のアンテナと第2のアンテナの両方において2つのバンドを切り替える第2の方法を設定する、第1項に記載の端末。
(第4項)
前記制御部は、前記設定情報に基づいて、前記方法が前記第1の方法の場合、前記バンドペアごとに前記第1のアンテナで用いるバンドを設定する、第3項に記載の端末。
(第5項)
バンドペアを構成する2つのバンドを切り替える2つのアンテナを用いた上りリンク送信切替に関する設定情報を設定する制御部と、
前記設定情報を端末に送信する送信部と、
を有する基地局。
(第6項)
バンドペアを構成する2つのバンドを切り替える2つのアンテナを用いた上りリンク送信切替に関する設定情報を基地局から受信するステップと、
前記設定情報に基づいて、前記上りリンク送信切替の方法と切替時間を設定するステップと、
を有する端末が実行する通信方法。
次に、これまでに説明した処理及び動作を実行する基地局10及び端末20の機能構成例を説明する。基地局10及び端末20は上述した実施例を実施する機能を含む。ただし、基地局10及び端末20はそれぞれ、実施例の中の一部の機能のみを備えることとしてもよい。
図13は、本実施形態における基地局10の機能構成の一例を示す図である。図13に示されるように、基地局10は、送信部110と、受信部120と、設定部130と、制御部140とを有する。図13に示される機能構成は一例に過ぎない。本実施形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
図14は、本実施形態における端末20の機能構成の一例を示す図である。図14に示されるように、端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図14に示される機能構成は一例に過ぎない。本実施形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。
上記実施形態の説明に用いたブロック図(図13及び図14)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、本実施形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、基地局10及び端末20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本実施形態に従って基地局10が有するプロセッサにより動作するソフトウェア及び本実施形態に従って端末20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
110 送信部
120 受信部
130 設定部
140 制御部
20 端末
210 送信部
220 受信部
230 設定部
240 制御部
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 前輪
2008 後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM,RAM)
2033 通信ポート(IOポート)
Claims (6)
- バンドペアを構成する2つのバンドを切り替える2つのアンテナを用いた上りリンク送信切替に関する設定情報を基地局から受信する受信部と、
前記設定情報に基づいて、前記上りリンク送信切替の方法と切替時間を設定する制御部と、
を有する端末。 - 前記制御部は、前記設定情報に基づいて、前記バンドペアごと又はセルグループごとに、前記上りリンク送信切替の方法と切替時間を設定する、請求項1に記載の端末。
- 前記制御部は、前記設定情報に基づいて、前記方法として、第1のアンテナでは1つのバンドのみを用いて、第2のアンテナでは2つのバンドを切り替える第1の方法、又は第1のアンテナと第2のアンテナの両方において2つのバンドを切り替える第2の方法を設定する、請求項1に記載の端末。
- 前記制御部は、前記設定情報に基づいて、前記方法が前記第1の方法の場合、前記バンドペアごとに前記第1のアンテナで用いるバンドを設定する、請求項3に記載の端末。
- バンドペアを構成する2つのバンドを切り替える2つのアンテナを用いた上りリンク送信切替に関する設定情報を設定する制御部と、
前記設定情報を端末に送信する送信部と、
を有する基地局。 - バンドペアを構成する2つのバンドを切り替える2つのアンテナを用いた上りリンク送信切替に関する設定情報を基地局から受信するステップと、
前記設定情報に基づいて、前記上りリンク送信切替の方法と切替時間を設定するステップと、
を有する端末が実行する通信方法。
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Non-Patent Citations (1)
| Title |
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| JING LIU, ZTE CORPORATION, SANECHIPS: "Discussion on Rel-18 UL Tx switching capability and configuration", 3GPP DRAFT; R2-2301320; TYPE DISCUSSION; NR_MC_ENH, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. RAN WG2, no. Athens, GR; 20230227 - 20230303, 17 February 2023 (2023-02-17), FR, XP052245957 * |
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