WO2024100736A1 - 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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- WO2024100736A1 WO2024100736A1 PCT/JP2022/041446 JP2022041446W WO2024100736A1 WO 2024100736 A1 WO2024100736 A1 WO 2024100736A1 JP 2022041446 W JP2022041446 W JP 2022041446W WO 2024100736 A1 WO2024100736 A1 WO 2024100736A1
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- bands
- switching
- terminal
- base station
- band
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0457—Variable allocation of band or rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
- H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
Definitions
- This disclosure relates to a terminal, a base station, and a communication method in a wireless communication system.
- the 3rd Generation Partnership Project (3GPP: registered trademark) has developed specifications for Long Term Evolution (LTE), and the 5th generation mobile communication system (5G, also known as New Radio (NR) or Next Generation (NG)), and is also developing specifications for the next generation, known as Beyond 5G, 5G Evolution or 6G.
- LTE Long Term Evolution
- 5G also known as New Radio (NR) or Next Generation (NG)
- NG Next Generation
- 3GPP Release 18 allows for the setting of three or four bands as bands that can be used for uplink (UL) transmission, and a mechanism is being considered to support simultaneous transmission using up to two bands (UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2 Tx simultaneous transmission) (Non-Patent Document 1).
- Non-Patent Document 2 the minimum separation time, which specifies the minimum interval for UL transmissions switched between bands, is being considered.
- the following disclosure has been made in light of this situation, and aims to provide a terminal, base station, and communication method that can set an appropriate minimum separation time between UL transmission switches, taking into account implementation and complexity, even when the number of bands available for UL transmission increases.
- One aspect of the present disclosure includes a control unit (240) that controls uplink transmission using N bands (N is a natural number equal to or less than M) that are selected from M bands (M is a natural number equal to or greater than 3), and a transmission unit (210) that executes the uplink transmission in which a first minimum interval or a second minimum interval longer than the first minimum interval is applied to the uplink transmission switched between the M bands, and the control unit is a terminal (20) that applies the second minimum interval to a specific uplink transmission.
- N is a natural number equal to or less than M
- M is a natural number equal to or greater than 3
- One aspect of the present disclosure is a base station (10) that includes a receiver (120) that performs uplink reception using N bands (N is a natural number equal to or less than M) that are selected from M bands (M is a natural number equal to or greater than 3), and a controller (140) that assumes application of a first minimum interval or a second minimum interval that is longer than the first minimum interval to the uplink reception that is switched between the M bands, and the controller assumes that the second minimum interval is applied to a specific uplink reception.
- N is a natural number equal to or less than M
- M is a natural number equal to or greater than 3
- One aspect of the present disclosure is a communication method including the steps of controlling uplink transmission using N bands (N is a natural number equal to or less than M) selected from M bands (M is a natural number equal to or greater than 3), and performing uplink transmission in which a first minimum interval or a second minimum interval longer than the first minimum interval is applied to the uplink transmission switched between the M bands, and in the step of performing the uplink transmission, the second minimum interval is applied to a specific uplink transmission.
- N is a natural number equal to or less than M
- M is a natural number equal to or greater than 3
- FIG. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
- 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention.
- This diagram illustrates case 1 and case 2 in UL Tx switching.
- This figure shows example configurations of antenna ports used for transmission for each case in UL Tx switching.
- This figure shows example configurations of antenna ports used for transmission for each case in UL Tx switching.
- a diagram showing an example of RRC configuration. A diagram showing an example of a switching period.
- This figure shows cases 1 to 3 in UL Tx switching.
- FIG. 2 is a diagram illustrating an example of a basic operation of the embodiment. A diagram showing an example of setting the Minimum Separation Time.
- FIG. 2 is a diagram illustrating an example of the configuration of a base station 10.
- FIG. 2 is a diagram illustrating an example of the configuration of a terminal 20.
- 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention.
- FIG. 1 is a diagram illustrating an example of a configuration of a vehicle.
- existing technologies are used as appropriate.
- the existing technologies in question are, for example, existing LTE or existing NR, but are not limited to existing LTE and 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
- NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc.
- NR- even if a signal is used in NR, it is not necessarily specified as "NR-".
- the duplex method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or another method (e.g., Flexible Duplex, etc.).
- TDD Time Division Duplex
- FDD Frequency Division Duplex
- another method e.g., Flexible Duplex, etc.
- radio parameters and the like when radio parameters and the like are “configured,” it may mean that predetermined values are pre-configured, or that radio 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 an embodiment of the present invention.
- the wireless communication system in the embodiment of the present invention 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, where 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 on DL and transmits control signals or data to the base station 10 on 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 for explaining an example (2) of a wireless communication system in an embodiment of the present invention.
- FIG. 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is implemented.
- base station 10A which is an MN (Master Node)
- base station 10B which is an SN (Secondary Node).
- 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.
- MCG Master Cell Group
- SCG Secondary Cell Group
- an MCG is composed of one PCell and one or more SCells
- an SCG is composed of one PSCell (Primary SCG Cell) and one or more SCells.
- the processing operations in this embodiment may be 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.
- 3GPP is currently studying ways to enhance multi-carrier operation. Specifically, they are considering the operation of a terminal that supports up to two simultaneous transmissions in FR1 (Frequency Range 1) to dynamically switch the band for UL transmission across three or four bands. Note that in the following explanation, “carrier,” “CC,” and “cell” may be used interchangeably.
- the terminal 20 supports a UL Tx switching function (uplink transmission switching function) that is a function that can switch UL transmission between two bands (two carriers). Even in a terminal 20 that has only two transmission chains (Tx Chains), by using the UL Tx switching function, it is possible to perform operations such as transmitting with two antenna ports for one carrier, or using one antenna port for one carrier and transmitting with another antenna port for another carrier by switching over time.
- a UL Tx switching function uplink transmission switching function
- Tx Chains transmission chains
- the transmission chain (which may also be called a Tx Chain or transmission system) is a physical function for transmission in the terminal 20, regardless of whether or not actual transmission is performed.
- One transmission chain can transmit using one carrier.
- the carrier used by the transmission chain the transmission function unit corresponding to the carrier
- it is possible to switch the carrier that can be transmitted by the transmission chain.
- An antenna port is an antenna that can actually transmit using a transmit chain (Tx Chain).
- Tx Chain transmit chain
- the transmit chain and antenna port are sometimes used synonymously.
- An "antenna port” may also be called a "port.”
- one band has one carrier. Therefore, in this specification and claims, "band” may be replaced with “carrier”, and “carrier” may be replaced with “band”.
- one band having one carrier is just an example, and one band may have multiple carriers. When one band has multiple carriers, the number and relationship of the carriers may be limited, for example, to two carriers that are consecutive in frequency. Multiple carriers in one band may be treated the same as one UL band (carrier) in the following description.
- 3GPP is considering "UL Tx switching schemes across up to 3 or 4 bands with restriction of up to 2 Tx simultaneous transmission for FR1 UEs" (a function that allows terminals that support up to two simultaneous transmissions in FR1 to dynamically switch the band in which they transmit UL across three or four bands). For convenience, this function may be called “Rel-18 UL Tx switching”.
- the above function allows a terminal that is not capable of UL CA (Carrier Aggregation) or is capable of only up to two UL CAs to be configured with three or four UL bands (carriers), and for the base station 10 to dynamically instruct the terminal to transmit in one or two of these UL bands (carriers).
- UL CA Carrier Aggregation
- carriers carriers
- This function makes it possible to take into account the traffic conditions and TDD configuration between multiple UL bands (carriers) and to instruct the terminal 20 to perform UL transmission using the UL band (carrier) that is suitable for use in each time resource. This improves frequency utilization efficiency and UL throughput.
- multiple DL/UL carriers can be configured as serving cells with the number of CCs of the UL CA supported by the terminal 20 or less, and the UL CC to be used for transmission can be dynamically indicated among them.
- Rel-18 UL Tx switching it is necessary to configure a number of UL carriers greater than the number of CCs of the UL CA supported by the UL CA.
- conventional technology does not anticipate the number of UL CCs being configured greater than the number supported.
- SUL Supplemental uplink
- the terminal 20 corresponds to two carriers and has two transmission chains.
- One transmission chain is fixed to one carrier, but the other transmission chain can be associated with one of the two carriers by a switch. Therefore, for example, simultaneous transmission by two antenna ports with one carrier is possible. It is also possible for each antenna port to transmit with one carrier and one antenna port. These methods can be dynamically switched.
- UL Tx switching in Rel-16 is called Rel-16 1Tx-2Tx switching.
- Case 1 a configuration in which each transmission chain is associated with one carrier
- Case 2 a configuration in which two transmission chains are associated with one carrier
- Figure 4 shows the configuration of the transmission chains used for transmission in the SUL for Case 1 and Case 2.
- 1T+1T in Case 1 means that in the example in Figure 3, carrier 2 is connected to transmission chain 1, and carrier 1 is connected to transmission chain 2.
- 1P+0P in a 1T+1T state means that transmission with carrier 1 is performed on antenna port 2, but no transmission is performed on antenna port 1.
- 1P+1P does not exist, since two carriers cannot be set simultaneously.
- transmission of only NUL (carrier 2) is not assumed in case 1, so 0P+1P does not exist.
- 0P+2P, 0P+1P in case 2 means that transmission is performed using carrier 2 on antenna port 1 and antenna port 2, or that transmission is performed using carrier 2 on antenna port 1 only.
- Rel-16 1Tx-2Tx switching has two options: Option 1, which does not allow two carriers to be used simultaneously, and Option 2, which allows two carriers to be used simultaneously.
- Option 1 which does not allow two carriers to be used simultaneously
- Option 2 which allows two carriers to be used simultaneously.
- the transmission chain configuration used for transmission with Option 1 is the same as that shown in Figure 4.
- the transmission chain configuration used for transmission with Option 2 is as shown in Figure 5.
- Figure 6 shows an example of UE capability reported from terminal 20 to base station 10, as specified in accordance with Rel-16 1Tx-2Tx switching.
- Figure 7 shows an example of CellGroupConfig and ServingCellConfig set from base station 10 to terminal 20, as specified in accordance with Rel-16 1Tx-2Tx switching.
- uplinkTxSwitchingPeriodLocation-r16 in ServingCellConfig indicates whether a UL Tx switching period is set in the target cell (carrier). Examples of operation related to the UL Tx switching period are shown in Figures 8 and 9.
- Figure 8 shows an example where a UL Tx switching period is set to occur in carrier 1.
- a UL Tx switching period occurs in carrier 1 in both cases of switching from carrier 1 to carrier 2 and switching from carrier 2 to carrier 1.
- Figure 9 shows an example where a UL Tx switching period is set to occur on carrier 2.
- the terminal 20 When dynamically switching between two carriers, the terminal 20 is permitted a DL interruption of a certain length in the DL carrier where the DL interruption overlaps with the UL switching period.
- the length (X OFDM symbols) is specified as shown in Figure 10.
- the UL Tx switching in Rel-16 can be summarized as follows: Based on PUSCH scheduling (scheduling command, rank adaptation) from the base station 10, the terminal 20 can dynamically switch between "1-port transmission on carrier 1", “1-port transmission on carrier 2", “1-port transmission on carrier 1 + 1-port transmission on carrier 2" (only applicable when option 2 is supported in inter-band CA), and "2-port transmission on carrier 2 (with or without 3dB power boosting)".
- a switching period occurs, during which UL transmission is not performed on either carrier. There are also cases where a DL interruption occurs during a switching period.
- Rel-17 will be described.
- each of the two transmission chains can handle two carriers, it is 2Tx-2Tx UL Tx switching.
- case 3 is added as a case of the connection pattern of the transmission chain and the carrier in addition to case 1 and case 2, as shown in FIG. 11, in comparison with Rel-16. Therefore, it is necessary for the terminal 20 and the base station 10 to distinguish between Rel-17 (2Tx-2Tx UL Tx switching) and Rel-16 (1Tx-2Tx).
- terminal 20 must decide which of the remaining two cases to switch to.
- Figure 13 shows an example of RRC settings in Rel-17.
- uplinkTxSwitching-2T-Mode-r17 indicates the setting to switch to 2Tx-2Tx UL Tx switching mode
- uplinkTxSwitching-DualUL-TxState-r17 is information that sets which case to switch to when there are multiple candidates for which case to switch to when switching, as described above.
- Rel-16 and R-17 may also be applied to Rel-18 UL Tx switching.
- 1Tx-2Tx (-1Tx-1Tx) switching cases are also possible, where the band (carrier) that one port can use is fixed.
- This embodiment includes first to third embodiments. A basic operation example common to the first to third embodiments will be described with reference to FIG.
- the terminal 20 transmits capability information (capability) to the base station 10. An example of the capability information will be described in the first embodiment.
- the base station 10 transmits setting information (or instruction information) to the terminal 20. An example of the setting information/instruction information will be described in the second embodiment.
- the base station 10 determines the settings/instructions for the terminal 20 within the range of the capabilities of the terminal 20 indicated in the capability information of the terminal 20 received in S101, creates the setting information/instruction information, and transmits it in S102.
- this assumption is just one example.
- the terminal 20 that received the setting information/instruction information in S102 operates according to that information.
- the terminal 20 receives DCI from the base station 10 in S103, for example, in accordance with the setting information, the band to which the port is connected is switched based on the DCI, and transmission is performed from the port after the switch in S104.
- the configuration information/instruction information at S102 may be transmitted by any of RRC signaling, MAC CE, and DCI.
- RRC signaling any of RRC signaling, MAC CE, and DCI.
- the terminal 20 reports at least one of the multiple pieces of capability information listed below as capabilities that the terminal 20 supports for Rel-18 UL Tx switching to the base station 10. All of the examples listed below are examples of capability information related to bands.
- the terminal 20 receives at least one of the multiple pieces of setting information/instruction information listed below from the base station 10 as setting information/instruction information for Rel-18 UL Tx switching. In other words, the base station 10 transmits at least one of the multiple pieces of setting information/instruction information listed below to the terminal 20. All of the examples listed below are examples of information related to band switching.
- ⁇ DL/UL serving cells and UL only serving cells including UL for Rel-18 UL Tx switching (or either DL/UL serving cells or UL only serving cells)
- Other serving cells for which switching and/or simultaneous transmission can be instructed in each serving cell For each serving cell, for each combination with other serving cells (whether or not a switching period is included, whether power boosting is allowed, whether simultaneous transmission is allowed, case interpretation when switching from a specific port configuration to another specific port configuration is instructed) The number of ports to be switched to band Whether each serving cell is linked to a port to be switched to band (or not)
- the first and second embodiments will be described in detail below. Each of Examples 1 to 9 of the first embodiment can be combined with any of Examples 1 to 9 of the second embodiment.
- the terminal 20 reports to the base station at least one of the capability information shown in the following examples 1 to 9. Also, the terminal 20 may report information that combines any or all of the capability information shown in examples 1 to 9.
- the terminal 20 reports information on one or more band combinations (BCs) for UL Tx switching supported for Rel-18 UL Tx switching to the base station 10 separately from the BCs for UL CA.
- BCs band combinations
- the reported band combinations (BCs) for UL Tx switching may include BCs that are not compliant with UL CA.
- Each BC included in one or more band combinations (BCs) for UL Tx switching may be information indicating the combination of bands that are the subject of switching.
- terminal 20 may report BC4 and BC5 as band combinations (BCs) for UL Tx switching.
- BC1, BC2, and BC3 as BCs for UL CA
- terminal 20 may report BC4 and BC5 as band combinations (BCs) for UL Tx switching.
- each band combination (BC) included in one or more reported UL Tx switching band combinations (BCs) may also be a restriction that each band combination (BC) included in one or more reported UL Tx switching band combinations (BCs) must be UL CA compliant BCs.
- Rel-18 there may be a restriction in Rel-18 that when reporting a BC for UL Tx switching, it is necessary to report the capabilities specified in Rel-16/17 for each band combination within the BC.
- Rel-18 when reporting a BC for Bands A-B-C in Rel-18, it is necessary to report the capabilities specified in Rel-16/17 for A-B, A-C, and B-C.
- each "band combination" within the BC may be supported.
- A-B, A-C, and B-C must also be supported.
- Example 2 The terminal 20 reports information about the number of CCs supported in each band of the BC for UL Tx switching described in Example 1 to the base station 10.
- the information about the number of CCs may be the number of CCs (number of cells) itself.
- the band in Example 2 (the band for which the number of CCs is reported) may be a band other than the band in the BC reported in Example 1.
- the specifications may specify the upper limit of the number of CCs or the total bandwidth that can be supported in each band in Rel-18 UL Tx switching.
- the number of CCs that the terminal 20 can support may be specified as "up to 2 consecutive CCs" or "consecutive CCs within a 100 MHz band.”
- the upper limit of the number of CCs that can be supported or the total bandwidth may be specified for TDD and FDD separately, rather than for each band.
- the base station 10 sets CCs within the band for UL Tx switching for the terminal 20 in accordance with these specifications.
- the terminal 20 reports to the base station 10 information on whether or not a DL carrier is required for each band of the BC for UL Tx switching described in Example 1. For example, when there are bands_A, B, and C for a certain BC, the terminal 20 reports information such as ⁇ Band_A: DL carrier required, Band_B: DL carrier not required, Band_C: DL carrier not required ⁇ for the BC. Note that the terminal 20 basically only needs to be able to perform DL reception with any of the carriers, and therefore may determine that a DL carrier is not required in a certain band.
- the specifications may specify conditions for UL carriers/bands that do not require an associated DL carrier. Conditions may include, for example, TDD (or FDD), a specific band, or only if a specific band is included in the BC.
- the band in Example 3 (the band reporting whether or not a DL carrier is required) may be a band other than the band within the BC reported in Example 1.
- the terminal 20 reports to the base station 10 information on whether or not simultaneous transmission is supported for each combination of bands to be switched in the BC for UL Tx switching described in the first example.
- the terminal 20 reports to the base station 10 information such as, for B-C of bands A-B-C-D, bands A-B are capable of simultaneous transmission (dual UL or both), and bands A-C and A-D are not capable of simultaneous transmission (switched UL).
- the terminal 20 may report information to the base station 10 regarding whether or not simultaneous transmission is supported for each band, or for all combinations within a BC, or for all BCs for Rel-18 UL Tx switching supported by the terminal 20, rather than for each combination of bands to be switched.
- the band in Example 4 (the band for which simultaneous transmission support is reported) may be a band other than the band within the BC reported in Example 1.
- the terminal 20 reports information about the switching period for each combination of bands in which switching is performed within the BC for UL Tx switching described in example 1.
- the information about the switching period may be the value of the switching period.
- the terminal 20 reports to the base station 10 information such as, for BC of bands A-B-C-D, the switching period for bands A-B is n35 ⁇ s, and for A-C and A-D it is n140 ⁇ s.
- the terminal 20 may report information regarding the switching period to the base station 10 not for each combination of bands to be switched to, but for each band, or for every combination within the above BCs, or for all BCs for Rel-18 UL Tx switching supported by the terminal.
- new candidate switching period values may be specified for Rel-18 UL Tx switching, and some values that were reportable for Rel-16/17 may not be reportable for Rel-18.
- the band in Example 5 (the band for which the switching period is reported) may be a band other than the band within the BC reported in Example 1.
- the terminal 20 may report bands in which DL interruptions occur for each combination of bands switched in the BC for UL Tx switching described in the first example.
- terminal 20 reports to base station 10 that for BC of bands A-B-C-D, 0100 for bands A-B, 1010 for bands A-C, etc.
- This bitmap indicates bands A-B-C-D, and means that in the bands corresponding to a bit of 1, a DL interruption will occur when switching.
- the terminal 20 may report to the base station 10 information regarding the bands in which DL interruptions occur, not for each combination of bands to be switched, but for each band, or for all combinations within the above BCs, or for all BCs for Rel-18 UL Tx switching supported by the terminal.
- the specifications may specify whether DL interruption is permitted for each band combination for Rel-18 UL Tx switching, or for each combination of two bands within a band combination.
- the band in Example 6 may be a band other than the band within the BC reported in Example 1.
- Example 6 when base station 10 receives information indicating that a DL interruption will occur in a certain band, it may, for example, schedule DL reception in that band, taking into account the possibility of a DL interruption occurring.
- the terminal 20 may report information regarding whether or not power boosting is supported for each combination of bands switched in the BC for UL Tx switching described in the first example.
- terminal 20 reports to base station 10 information such as, for B-C of bands A-B-C-D, power boosting is possible in bands A-B, but not in A-C and A-D.
- Power boosting is possible in bands A-B means, for example, that when terminal 20 switches ports between bands A-B and ends up transmitting from two ports in one band, it is possible to increase the transmission power (output power).
- “power boosting is possible in bands A-B” may mean that it is possible to increase the transmission power (output power) when transmitting simultaneously in bands A and B.
- the terminal 20 may report information to the base station 10 regarding whether or not power boosting is supported, not for each combination of bands to be switched, but for each band, or for every combination within a BC, or for all BCs for Rel-18 UL Tx switching supported by the terminal.
- the band in Example 7 (the band for which power boosting availability is reported) may be a band other than the band within the BC reported in Example 1.
- a base station 10 When a base station 10 receives information indicating that power boosting is possible in a certain band, it may perform transmission power control on a terminal 20 using DCI or MAC CE so that power boosting is performed when scheduling simultaneous transmission from two ports in that band.
- the terminal 20 may report to the base station 10 information on the number of ports (e.g., 1 or 2) that can switch bands within the BC for UL Tx switching described in Example 1.
- the terminal 20 may report the target band of the port with the fixed band.
- the terminal 20 reports to the base station 10 information such as "port 1 is fixed to band A in the BC of bands ABCD.”
- a specified number of layers (e.g., 2) may be reported as the number of MIMO layers for that target band, and the specified number of layers (e.g., 2) may not be reported as the number of MIMO layers for other bands.
- the band in Example 8 (the band for which the number of ports capable of band switching is reported) may be a band other than the band within the BC reported in Example 1.
- the terminal 20 may report information about switching candidate bands for each port in the BC for UL Tx switching described in Example 1. For example, the terminal 20 reports to the base station 10 information such as that in the BC of band ABCD, A and B are switching candidates for port 1, and A, B, C, and D are switching candidates for port 2.
- the terminal 20 may report to the base station 10 the number of ports supported in each band within the above BC (e.g., A is 2, B is 2, C is 1, D is 1, etc.).
- Example 9 (candidate band for switching) may be a band other than the band within the BC reported in Example 1.
- the technology according to the first embodiment described using Examples 1 to 9 allows the base station 10 to know the UL Tx switching capabilities of the terminal 20, and therefore makes it possible to perform settings, instructions, or scheduling to appropriately perform UL Tx switching.
- the terminal 20 is configured or instructed by the base station 10 to have at least one of the following examples 1 to 9 by any one or a combination of several of RRC signaling, MAC-CE, and DCI. Also, the base station 10 may configure or instruct the terminal 20 to have a combination of several or all of the examples 1 to 9.
- the terminal 20 is configured with a DL/UL serving cell (a cell having a UL carrier and a DL carrier) including a UL used for Rel-18 UL Tx switching, or a UL only serving cell (a cell with only a UL carrier) including a UL used for Rel-18 UL Tx switching, from the base station 10.
- the terminal 20 may be configured with both a DL/UL serving cell including a UL used for Rel-18 UL Tx switching, and a UL only serving cell including a UL used for Rel-18 UL Tx switching, from the base station 10.
- "certain information is configured” means that the terminal 20 receives the information from the base station 10.
- the base station 10 can determine which cell to set for the terminal 20. For example, the base station 10 can set the cell (carrier) included in the BC received in Example 1 of the first embodiment as the serving cell for the terminal 20.
- the base station 10 may set a cell in a band in which no DL carrier is required as a UL only serving cell to the terminal 20 based on the information received in Example 3 of the first embodiment.
- the serving cell in the following Examples 2 to 9 is the cell set in the terminal 20 in Example 1. However, this is not limited to this, and the serving cell in the following Examples 2 to 9 may be a cell other than the cell set in Example 1.
- the settings/instructions in the following examples 2 to 9 may be made when the cells are set in example 1, or may be made at a later time after the cells are set in example 1.
- Example 2 When the terminal 20 receives a specific IE/parameter from the base station 10 by the ServingCellConfig for a certain cell, the specific IE/parameter is set in the terminal 20 .
- the terminal 20 may recognize that the cell includes a UL used for Rel-18 UL Tx switching based on a specific IE/parameter received from the base station 10.
- ServingCellConfig is an example, and other messages or signals may be used.
- the terminal 20 may recognize that a cell is a UL only serving cell used for Rel-18 UL Tx switching when a specific IE/parameter is set by the ServingCellConfig for that cell from the base station 10.
- the terminal 20 may recognize from the base station 10 that a certain IE/parameter is not set in the ServingCellConfig for a certain cell, and therefore that the cell is a UL only serving cell used for Rel-18 UL Tx switching.
- ServingCellConfig is an example, and other messages or signals may be used.
- Example 4 Information about other serving cells for which switching and/or simultaneous transmission may be instructed in each serving cell is set in the terminal 20 by the base station 10. For example, it is assumed that information about other serving cells for which switching/simultaneous transmission may be instructed is included in the ServingCellConfig.
- terminal 20 when terminal 20 receives an RRC message (e.g., ServingCellConfig) for cell A and detects in that RRC message that cell B is another serving cell for which switching/simultaneous transmission may be instructed, it assumes that switching/simultaneous transmission between cell A and cell B may be instructed.
- RRC message e.g., ServingCellConfig
- the terminal 20 may be configured with information regarding whether or not a switching period is included in each combination of a serving cell with another serving cell from the base station 10.
- information regarding whether or not a switching period is included may be configured on a serving cell basis or on a cell group basis, rather than on a combination of a serving cell with another serving cell.
- an RRC message (e.g., ServingCellConfig, CellGroupConfig) contains information regarding whether or not a switching period is included.
- terminal 20 receives an RRC message for cell A and detects information within that RRC message that means that "when switching between cell A and cell B, a switching period exists in cell B." In this case, when terminal 20 receives UL scheduling information that causes switching between cell A and cell B, it performs switching at the switching period on the cell B side.
- Example 6 Information regarding whether power boosting is permitted for each combination of a serving cell with another serving cell is set to the terminal 20 from the base station 10. Alternatively, information regarding whether power boosting is permitted on a serving cell basis or on a cell group basis, rather than on a combination of a serving cell with another serving cell, may be set.
- a certain RRC message e.g., ServingCellConfig, CellGroupConfig
- RRC message contains information regarding whether power boosting is permitted.
- terminal 20 receives an RRC message and detects information within the RRC message that means that "power boosting is permitted when simultaneous two-port transmission occurs in cell A during switching between cell A and cell B.”
- terminal 20 implements power boosting when it receives UL scheduling information indicating that simultaneous two-port transmission occurs in cell A due to switching from cell B to cell A.
- the terminal 20 is configured with information on whether simultaneous transmission is permitted for each serving cell in each combination with other serving cells from the base station 10.
- information on whether simultaneous transmission is permitted on a serving cell basis or on a cell group basis, rather than for each combination with other serving cells may be configured.
- the configuration on a serving cell basis for example, when “simultaneous transmission OK" is configured for cell A, this may mean that simultaneous transmission is OK with any cell in combination with cell A.
- a certain RRC message e.g., ServingCellConfig, CellGroupConfig
- RRC message contains information regarding whether simultaneous transmission is permitted.
- terminal 20 receives an RRC message for cell A and detects information within the RRC message indicating that "simultaneous transmission is permitted in cell A and cell B.”
- terminal 20 receives UL scheduling information that results in simultaneous transmission in cell A and cell B.
- base station 10 can perform UL scheduling for terminal 20 that results in simultaneous transmission in cell A and cell B.
- the terminal 20 may be configured with information regarding case interpretation when a switching from a specific port configuration to another specific port configuration is instructed in each serving cell for each combination with another serving cell from the base station 10.
- information regarding case interpretation when a switching from a specific port configuration to another specific port configuration is instructed on a serving cell basis or on a cell group basis, not for each combination with another serving cell may be configured.
- an RRC message (e.g., ServingCellConfig, CellGroupConfig) contains information about case interpretation.
- the terminal 20 when the terminal 20 receives the above RRC message and detects that the RRC message contains "information for uniquely determining the case number of the destination when transitioning from a certain Tx chain state (certain case number) to another Tx chain state (another case number) after UL Tx switching and the case number of the destination cannot be uniquely determined," it determines the Tx chain (port configuration) to transition to after UL Tx switching according to that information.
- the above “information for determination” may be an explicit “pair of case number before the transition and case number after the transition”, or it may be information indicating that "2 ports are connected to 1 carrier", or information indicating that "1 port is connected to 1 carrier".
- terminal 20 Assume that the above information is set in terminal 20 to indicate that "one port is connected to one carrier." In this case, when terminal 20 is in the state of case 2 and UL transmission of 1P+0P+0P+0P is scheduled by DCI, it switches to case 1.
- the base station 10 can perform subsequent scheduling, assuming the above transition destination.
- Example 9 Information regarding the number of ports subject to band switching for each cell group is set to the terminal 20 by the base station 10. In addition to this, or instead of this, information regarding whether each serving cell is linked to a port subject to band switching may be set to the terminal 20 by the base station 10. Also, information regarding whether each serving cell is linked to a port not subject to band switching may be set to the terminal 20 by the base station 10.
- Information regarding whether a serving cell is associated with a port that is subject to band switching is an example of information regarding an antenna port that is subject to band switching.
- Information regarding whether a serving cell is associated with a port that is not subject to band switching is an example of information regarding an antenna port that is not subject to band switching.
- terminal 20 when terminal 20 receives information from base station 10 via an RRC message that corresponds to "cells A and B are subject to switching of port 1, and cell C uses port 2 fixedly," it is assumed that scheduling is performed corresponding to "transmitting from cell A or cell B via port 1, and transmitting from cell C via port 2.”
- base station 10 can perform scheduling for terminal 20 corresponding to "transmitting from cell A or cell B via port 1, and transmitting from cell C via port 2.”
- the technology according to the second embodiment described using Examples 1 to 9 allows the base station 10 to set/instruct the terminal 20 according to its capabilities related to UL Tx switching, making it possible to appropriately perform UL Tx switching.
- Minimum Separation Time is specified as 14 symbols based on the subcarrier spacing (SCS).
- ⁇ Alt.3 If a total of 3 bands are involved, the X slot is specified as the Minimum Separation Time. If a total of 4 bands are involved, the Y slot is specified as the Minimum Separation Time. X and/or Y must be 1 or greater.
- ⁇ Alt.4 The terminal reports the Minimum Separation Time for different switching cases.
- the switching gap may be interpreted as the time difference (N TX1 -N TX2 ) between two UL transmissions (N TX1 , N TX2 ) as specified in 3GPP TS38.214, Chapter 6.1.6, etc., but may be substantially equivalent to the switching period shown in Fig. 8, etc.
- the switching gap may be a time applied for switched UL to reduce complexity.
- the switching gap may be specified as something different from the existing switching period.
- the regulations do not assume that UL Tx switching will occur more than once within a slot. For example, it is possible to perform UL Tx switching in the latter half of slot n, and UL Tx switching at the beginning of slot n+1. In this case, the interval between UL Tx switching will be shorter, which may lead to concerns that UE implementation may become more complex.
- Minimum Separation Time has the following advantages and disadvantages:
- the UE may be able to simplify the implementation of UL Tx switching (for example, the process of rewriting the memory contents without increasing the memory size of the radio frequency (RF) information can be performed in the time until the next UL transmission switch).
- RF radio frequency
- Rel-18 will have UL Tx switching in 3 or 4 bands, and switching transitions that were not anticipated in Rel-16 and 17 may occur.
- multiple stages of Minimum Separation Time are defined for UL Tx switching.
- the multiple stages may be two stages, but more stages of Minimum Separation Time may be defined.
- the Minimum Separation Time assuming two stages of Minimum Separation Time may be interpreted as the minimum interval between UL transmissions performed based on two adjacent UL Tx switching in the time direction, which are switched between M bands (M is a natural number of 3 or more).
- M is a natural number of 3 or more.
- the Minimum Separation Time defines the minimum interval between the two UL transmissions, and can also be said to be the minimum separation time that separates the two UL transmissions in the time direction.
- Figure 20 shows an example of setting the Minimum Separation Time.
- Figure 20 shows an example of the Minimum Separation Time between UL transmissions (UL TX) in units of symbols. Note that the unit of the Minimum Separation Time is not limited to symbols, and may be slots, minislots, half frames, etc. Also, in Figure 20, the Minimum Separation Time is set to the number of symbols from the start of the previous UL transmission to the start of the next UL transmission (which may include a switching gap), but other positions in the time direction may be used as the reference as long as the interval between the two UL transmissions can be specified.
- a loose (short) Minimum Separation Time may be specified as a baseline (first stage). Such a short Minimum Separation Time may be referred to as a first minimum interval. For example, as shown in FIG. 20, a number of symbols less than X symbols may be set as such a short Minimum Separation Time. For example, a similar specification to Rel-16,17 may be applied and extended to take into account 3 or 4 bands of SCS.
- Additional (second stage) Minimum Separation Times (which may be called Additional Minimum Separation Times) may be stipulated as stricter (longer) Minimum Separation Times that apply only in specific cases. Examples of specific cases include the following:
- Such a long Minimum Separation Time may be called a second minimum interval.
- a number of symbols equal to or greater than X symbols may be set as such a short Minimum Separation Time.
- the terminal 20 may perform UL transmissions switched between the M bands with a loose (shorter) baseline Minimum Separation Time (first minimum interval) or a stricter (longer) Minimum Separation Time (second minimum interval) than the baseline Minimum Separation Time, and may apply a longer Minimum Separation Time to certain UL transmissions as described above.
- the terminal 20 may apply a common Minimum Separation Time with a looser (shorter) baseline to all UL transmissions.
- the baseline Minimum Separation Time does not have to be common between all UL transmissions, and multiple different values (such as the number of symbols) may be set.
- UL Tx switching is limited to one time within one slot based on the largest SCS among the active UL BWP (Bandwidth part) of all bands included in the configured 3 or 4 band band combination (BC).
- UL Tx switching will be limited to one time within one slot based on the largest SCS among the active UL BWPs of the bands included in the upcoming UL Tx switching (the band before the switch and the band after the switch).
- the minimum separation time shall be the length of the number of symbols N based on the largest (or smallest) SCS among the active UL BWPs of all bands included in the configured 3 or 4 band combination.
- the Minimum Separation Time shall be the length of the number of symbols N based on the largest (or smallest) SCS among the active UL BWPs of the bands included in the upcoming UL Tx switching (the band before the switch and the band after the switch).
- a loose (shorter) baseline Minimum Separation Time may be set based on the SCS of the active BWP (bandwidth portion) of band M (e.g., 3 or 4).
- the Minimum Separation Time based on the SCS may mean the time of one symbol determined from the set SCS (e.g., 8.325 ⁇ s for a 120 kHz SCS).
- the loose (shorter) minimum separation time of the baseline may be commonly applied to all UL transmissions, while the stricter (longer) minimum separation time (additional minimum separation time) may be applied only in specific cases, as described above. More specific specific cases may include the following examples.
- the terminal 20 may apply an Additional Minimum Separation Time (second minimum separation time) to UL transmissions when transmitting terminal 20 specific capability information.
- the Additional Minimum Separation Time may be applied to a combination of an example in which it is applied only to UEs that report a specific UE capability, and an example in which it is applied only between UL Tx switching that meets specific conditions.
- At least one of the following options may be applied:
- the Additional Minimum Separation Time shall be the length of the number of symbols M based on the largest (or smallest) SCS among the active UL BWPs of all bands included in the configured 3 or 4 band combination.
- the Additional Minimum Separation Time shall be the length of the number of symbols M based on the largest (or smallest) SCS among the active UL BWPs of the bands included in the upcoming UL Tx switching (the band before the switch and the band after the switch).
- a strict (long) Additional Minimum Separation Time may be set based on the SCS of the active BWPs (bandwidth portions) of M (e.g., 3 or 4) bands.
- time units such as slots and symbols used in the operational examples may be expressed in other similar units.
- Fig. 21 is a diagram showing an example of the functional configuration of the base station 10.
- 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. 21 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and functional units may be any.
- the transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.
- the transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly.
- the receiver 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 transmitter 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, DCI via PDCCH, data via PDSCH, etc. to the terminal 20.
- the setting unit 130 stores the preset setting information and various setting information to be transmitted to the terminal 20 in a storage device provided in the setting unit 130, and reads it from the storage device as necessary.
- the control unit 140 schedules DL reception or UL transmission of the terminal 20 via the transmission unit 110.
- the control unit 140 also includes a function for performing LBT.
- the functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the reception unit 120.
- the transmission unit 110 may also be called a transmitter, and the reception unit 120 may also be called a receiver.
- Fig. 22 is a diagram showing an example of the functional configuration of the terminal 20.
- 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. 22 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and functional units may be any.
- the transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.
- the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
- the receiver 220 receives various signals wirelessly 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, DCI via PDCCH, data via PDSCH, etc. transmitted from the base station 10.
- the transmitter 210 may transmit 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 may receive PSCCH, PSSCH, PSDCH, PSBCH, etc. from the other terminal 20.
- the transmitter 210 also includes the antenna port described in this embodiment.
- the setting unit 230 stores various setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device provided in the setting unit 230, and reads it from the storage device as necessary.
- the setting unit 230 also stores setting information that is set in advance.
- the control unit 240 controls the terminal 20.
- the functional units in the control unit 240 related to signal transmission may be included in the transmission unit 210, and the functional units in the control unit 240 related to signal reception may be included in the reception unit 220.
- the transmission unit 210 may be called a transmitter, and the reception unit 220 may be called a receiver.
- This embodiment provides at least the following terminal, base station, and communication method.
- the terminal, base station, and communication method are described below in six appendices 1 to 6.
- the terminal comprises: a transmitter that reports to a base station the number of antenna ports capable of switching bands as capability information; and a receiver that receives from the base station information regarding antenna ports that are to be subject to band switching, or information regarding antenna ports that are not to be subject to band switching.
- the terminal comprises: a transmitter that reports to a base station information on bands used by antenna ports for which band switching is not performed as capability information; and a receiver that receives from the base station information on antenna ports for which band switching is to be performed, or information on antenna ports for which band switching is not to be performed.
- All of the above items 1 to 6 provide a technology that allows the band used for uplink transmission to be appropriately switched in a wireless communication system.
- the number of MIMO layers can be appropriately set.
- simultaneous monitoring can be clearly defined, and operation becomes clear.
- a single control information can be received satisfactorily in the scheduling source cell.
- candidate bands for switching become clear.
- a terminal comprising: a transmitter that reports information regarding the bands to be used in the transmission switching method to a base station as capability information, in a transmission switching method in which at least one of a plurality of antenna ports is capable of switching bands across two or more bands, and the bands used for transmission are switched across a total of three or more bands for the plurality of antenna ports; and a receiver that receives information from the base station for determining one of the plurality of states, when there are a plurality of candidate states for a transition from one state related to the plurality of antenna ports to another state by band switching.
- a base station comprising: a receiving unit that receives, from a terminal, information regarding the bands to be used in the transmission switching method as capability information, and a transmitting unit that transmits, when there are multiple candidate states for a transition from a certain state related to the multiple antenna ports to another state by band switching, information for determining one of the multiple states to be a transition destination, in a transmission switching method in which at least one of multiple antenna ports in the terminal is capable of switching bands across two or more bands, and the bands used for transmission are switched across a total of three or more bands for the multiple antenna ports, to the terminal.
- Addendum 2 eliminates ambiguity in the transition destination, enabling appropriate operation.
- Addendum 3 clarifies the number of carriers in a band.
- Addendum 4 makes it possible to set up a cell that does not have a downlink carrier.
- a terminal comprising: a transmitter that reports capability information indicating whether or not power boosting is possible when transmitting from multiple antenna ports to a base station; and a receiver that receives information from the base station regarding whether or not power boosting is possible when transmitting from multiple antenna ports, in a transmission switching method in which at least one of multiple antenna ports is capable of switching bands across two or more bands, and the bands used for transmission are switched across a total of three or more bands for the multiple antenna ports.
- paragraphs 1 to 5 provides a technology that allows a wireless communication system to appropriately switch the band used for uplink transmission.
- information about power boosting can be reported in various units.
- information about power boosting can be set in various units.
- a base station in a terminal in which at least one of a plurality of antenna ports can switch bands across two or more bands, and in which the bands used for transmission are switched across a total of three or more bands for the plurality of antenna ports, is provided with a receiving unit that receives capability information relating to a band in which downlink communication interruption occurs during switching from the terminal, and a transmitting unit that transmits control information for scheduling uplink transmission to the terminal.
- paragraphs 1 to 5 provides technology that allows appropriate switching of the band used for uplink transmission in a wireless communication system.
- information regarding downlink communication interruption can be reported in various units.
- information regarding downlink communication interruption can be reported efficiently.
- All of paragraphs 1 to 5 provide a technology that allows a wireless communication system to appropriately switch the band used for uplink transmission.
- capability information indicating the switching time can be reported in various units.
- information related to the switching time can be set in various units.
- a terminal comprising: a transmitter that reports capability information indicating whether simultaneous transmission is possible between bands to a base station; and a receiver that receives information from the base station regarding cells in which simultaneous transmission may be performed, in a transmission switching method in which at least one of a plurality of antenna ports is capable of switching bands across two or more bands, and the bands used for transmission are switched across a total of three or more bands for the plurality of antenna ports.
- a base station in a terminal in which at least one of a plurality of antenna ports can switch bands across two or more bands, and in which the bands used for transmission are switched across a total of three or more bands for the plurality of antenna ports, comprising a receiving unit that receives capability information indicating whether simultaneous transmission is possible between bands from the terminal, and a transmitting unit that transmits information to the terminal regarding cells in which simultaneous transmission may be performed.
- paragraphs 1 to 5 provides a technology that allows appropriate switching of the band used for uplink transmission in a wireless communication system.
- capability information indicating whether or not simultaneous transmission is possible in various units can be reported.
- various pieces of information regarding simultaneous transmission can be set.
- a terminal comprising: a control unit that controls uplink transmission using N bands (N is a natural number equal to or less than M) selected from M bands (M is a natural number equal to or greater than 3); and a transmission unit that performs uplink transmission in which a first minimum interval or a second minimum interval longer than the first minimum interval is applied to the uplink transmission switched between the M bands, wherein the control unit applies the second minimum interval to a specific one of the uplink transmissions.
- N is a natural number equal to or less than M
- M is a natural number equal to or greater than 3
- control unit sets at least one of the first minimum spacing and the second minimum spacing based on a subcarrier spacing of an active bandwidth portion of the M bands.
- a base station comprising: a receiving unit that performs uplink reception using N bands (N is a natural number equal to or less than M) selected from M bands (M is a natural number equal to or greater than 3); and a control unit that assumes application of a first minimum interval or a second minimum interval longer than the first minimum interval to the uplink reception switched between the M bands, wherein the control unit assumes that the second minimum interval is applied to a specific uplink reception.
- a communication method comprising: a step of controlling uplink transmission using N bands (N is a natural number equal to or less than M) selected from M bands (M is a natural number equal to or greater than 3); and a step of performing uplink transmission in which a first minimum interval or a second minimum interval longer than the first minimum interval is applied to the uplink transmission switched between the M bands, wherein in the step of performing uplink transmission, the second minimum interval is applied to a specific one of the uplink transmissions.
- 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, election, establishment, comparison, assumption, expectation, regard, 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. 23 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” may 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, runs 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 also 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. 21 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. 22 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 including 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, or a communication module.
- 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 section, a transmitting/receiving section, a transmission path interface, etc. may be realized by the communication device 1004.
- the transmitting/receiving section may be implemented as a transmitting section or a receiving section that are 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: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), etc., 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. 24 shows an example of the configuration of the vehicle 2001.
- the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, a front wheel 2007, a rear wheel 2008, an axle 2009, an electronic control unit 2010, 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 the vehicle 2001, and may be applied to the communication module 2013, for example.
- the functions of the terminal 20 may be mounted on the communication module 2013.
- the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
- the steering unit 2003 includes at least a steering wheel (also 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, a 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 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels acquired by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels acquired by an air pressure sensor 2023, a vehicle speed signal acquired by a vehicle speed sensor 2024, an acceleration signal acquired by an acceleration sensor 2025, an accelerator pedal depression amount signal acquired by an accelerator pedal sensor 2029, a brake pedal depression amount signal acquired by a brake pedal sensor 2026, a shift lever operation signal acquired by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired 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 various types of 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 external devices via the communication module 2013, etc., to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001.
- 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) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), an 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 electronic control unit 2010, and sensors 2021 to 29, which are provided in 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 transmits the current signal from the current sensor input to the electronic control unit 2010 to an external device via wireless communication.
- the communication module 2013 also transmits to an external device via wireless communication the following signals input to the electronic control unit 2010: front and rear wheel rotation speed signal acquired by the rotation speed sensor 2022, front and rear wheel air pressure signal acquired by the air pressure sensor 2023, vehicle speed signal acquired by the vehicle speed sensor 2024, acceleration signal acquired by the acceleration sensor 2025, accelerator pedal depression amount signal acquired by the accelerator pedal sensor 2029, brake pedal depression amount signal acquired by the brake pedal sensor 2026, shift lever operation signal acquired by the shift lever sensor 2027, detection signal for detecting obstacles, vehicles, pedestrians, etc. acquired by the object detection sensor 2028, etc.
- 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 communication module 2013 also stores the various information received from the external device in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the 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, axle 2009, sensors 2021-2029, 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 the processing procedures described in the embodiment may be changed as long as there is no contradiction.
- 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 of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each 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.
- 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 may be applied to at least one of systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), or other suitable systems, and next generation systems enhanced based thereon.
- Multiple systems may also be applied in combination (e.g., 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.
- a network consisting of one or more network nodes having a base station 10 it is clear that various operations performed for communication with a terminal 20 may be performed by the base station 10 and at least one of the other network nodes other than the base station 10 (such as, but not limited to, an MME or an S-GW).
- the other network node 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 1 bit (0 or 1), a Boolean value (true or false), 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 be transmitted and received over a transmission medium.
- a transmission medium such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave)
- 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 fixed station
- NodeB eNodeB
- gNodeB gNodeB
- access point e.g., "transmission point”
- gNodeB gNodeB
- base stations 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.
- the overall 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 part or the entire coverage area of a base station and/or a base station subsystem that provides communication services in this coverage.
- 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, or the moving object itself, etc.
- the moving object may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving object (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 also include devices that do not necessarily move during communication operations.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
- 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 communication between terminals (for example, "side”).
- the uplink channel, downlink channel, etc. may be read as a side channel.
- the terminal in this disclosure may be interpreted as a base station.
- the base station may be configured to have the functions of the terminal described above.
- determining and “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 to be a “judging” or “determining.” Also, “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 to be a “judging” or “determining.” Additionally, “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
- 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: Sub-Carrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, a particular filtering operation performed by the transceiver in the frequency domain, a particular windowing operation performed by the transceiver in the time domain, etc.
- SCS Sub-Carrier Spacing
- TTI Transmission Time Interval
- radio frame structure a particular filtering operation performed by the transceiver in the frequency domain, a particular windowing operation performed by the transceiver in the time domain, etc.
- a slot may consist of one or more symbols in the time domain (such as Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- 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.
- one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.
- 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 slot or one minislot when called a TTI, one or more TTIs (i.e., one or more slots or one or more minislots) 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 referred to as 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 referred to as 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.
- 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 also be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
- 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 (RE).
- RE 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 RBs relative to a common reference point of the carriers.
- PRBs may be defined in a BWP and numbered within that BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DLBWP).
- UL BWP UL BWP
- DLBWP 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 specified information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specified information).
- Base Station 110 Transmitter 120 Receiving unit 130 Setting section 140 Control section 20 Terminals 210 Transmitter 220 Receiving unit 230 Setting section 240 Control Unit 1001 Processor 1002 Storage device 1003 Auxiliary storage devices 1004 Communication equipment 1005 Input Device 1006 Output device 2001 Vehicle 2002 Drive unit 2003 Steering section 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 RPM 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 Support Systems Department 2031 Microprocessor 2032 Memory (ROM, RAM) 2033 Communication port (IO port)
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Abstract
Description
以下、図面を参照して本発明の実施の形態を説明する。なお、以下で説明する実施の形態は一例であり、本発明が適用される実施の形態は、以下の実施の形態に限られない。
従来技術(Rel-16、Rel-17)において、端末20には、2バンド(2キャリア)間でUL送信を切り替えることができる機能であるUL Tx switching機能(上り送信切り替え機能)がサポートされている。2つの送信チェイン(Tx Chain)しか有しない端末20であっても、UL Tx switching機能を用いることで、1キャリアで2つのアンテナポートで送信を行ったり、1キャリアで1アンテナポートを使用して別の1キャリアに対して別の1アンテナポートを使用して送信を行うといった動作を時間で切り替えて実施することができる。
Rel-16では、端末20は2つのキャリアに対応しており、2つの送信チェインを有している。1つの送信チェインは1つのキャリアに固定されるが、もう1つの送信チェインは、スイッチにより、2つのキャリアのうちのいずれかのキャリアに対応付けることができる。そのため、例えば、1つのキャリアで2つのアンテナポートによる同時送信を行うことが可能である。1キャリア1アンテナポートでの送信を各アンテナポートが行うことも可能である。これらの方式を動的に切り替えることができる。Rel-16のUL Tx switchingは、Rel-16 1Tx-2Tx switchingと呼ばれる。
次に、Rel-17について説明する。Re1-17では、2送信チェインそれぞれが2つのキャリアに対応できるので、2Tx-2Tx UL Tx switchingとなる。キャリア1でも2ポート送信が可能となるので、送信チェインとキャリアの接続パターンのケースとして、Rel-16と比較して、図11に示すように、ケース1、ケース2に加えて、ケース3が追加される。そのため、端末20及び基地局10にとって、Rel-17(2Tx-2Tx UL Tx switching)とRel-16 (1Tx-2Tx)との間の区別が必要となる。
Rel-18 UL Tx switchingにおいて想定されるケースと、各ケースにおいて送信を行うポートの構成を図17及び図18に示す。ここでは、一例としてUL Tx switchingに使用可能なバンドをA~Bの4バンドとしている。
本実施の形態には、第1実施形態~第3実施形態がある。図19を参照して、第1実施形態A~第3実施形態に共通の基本的な動作例を説明する。
端末20は、Rel-18 UL Tx switching向けに自身がサポートとしている機能として、下記に列挙した複数の能力情報のうちの少なくともいずれか1つを能力情報(capability)として基地局10に報告する。下記に列挙した例はいずれも、バンドに関する能力情報の例である。
・各バンドでサポート可能なCC数
・各バンドで紐づくDL carrier(下りキャリア)が必要か否か
・switchingするバンドの組み合わせ毎の{同時送信サポート有無,switching period, DL interruptionが生じるバンド,power boostingサポート有無}
・バンド切り替え可能なポート数
・バンドが固定されるポートの対象バンド
・各ポートの切り替え候補バンド
<第2実施形態の概要>
端末20は、Rel-18 UL Tx switching向けの設定情報/指示情報として、下記に列挙した複数の設定情報/指示情報のうちの少なくともいずれか1つを基地局10から受信する。言い換えると、基地局10は、下記に列挙した複数の設定情報/指示情報のうちの少なくともいずれか1つを端末20に送信する。下記に列挙した例はいずれも、バンド切り替えに関する情報の例である。
・各serving cellにおいてswitching及び/又は同時送信が指示され得る他のserving cell
・各serving cellにおいて他のserving cellとの組み合わせ毎に{switching periodを含むか否か,power boostingしてよいか,同時送信してよいか,特定のポート構成から別の特定のポート構成への切り替えが指示された場合のcase解釈}
・バンド切り替え対象のポート数
・各serving cellがバンド切り替え対象(又は切り替え非対象)のポートに紐づいているか否か
以下、第1実施形態と第2実施形態のそれぞれを詳細に説明する。第1実施形態の例1~例9はそれぞれ、第2実施形態の例1~例9のいずれとも組み合わせて実施可能である。
第1実施形態において、端末20は、以下の例1~例9に示す能力情報のうちの少なくともいずれか1つを基地局へ報告する。また、例1~例9のうちのいずれか複数又は全部を組み合わせた情報を報告してもよい。
端末20は、Rel-18 UL Tx switching向けにサポートしているUL Tx switching用の1つ又は複数のバンドコンビネーション(BC)に関する情報を、UL CA用BCとは別に、基地局10に報告する。
端末20は、例1で説明したUL Tx switching用のBCの各バンドでサポートするCC数に関する情報を基地局10に報告する。CC数に関する情報とは、CC数(セル数)そのものであってもよい。なお、例2におけるバンド(CC数を報告するバンド)が、例1で報告したBC内のバンドではないバンドであってもよい。
端末20は、例1で説明したUL Tx switching用のBCの各バンドにおいて、そのバンドに紐づくDL carrierが必要か否かに関する情報を基地局10に報告する。例えば、あるBCのバンド_Aとバンド_Bとバンド_Cが存在する場合に、そのBCについて、{バンド_A:DL carrier要、バンド_B:DL carrier不要、バンド_C:DL carrier不要、}といった情報を報告する。なお、端末20としては、基本的に、いずれかのキャリアでDL受信をできればよいので、あるバンドにおいてDL carrier不要とすることができる。
端末20は、例1で説明したUL Tx switching用のBC内でswitchingするバンドの組み合わせ毎の同時送信サポート有無に関する情報を基地局10に報告する。
端末20は、例1で説明したUL Tx switching用のBC内でswitchingするバンドの組み合わせ毎のswitching periodに関する情報を報告する。switching periodに関する情報とは、switching periodの値であってもよい。
端末20は、例1で説明したUL Tx switching用のBC内でswitchingするバンドの組み合わせ毎のDL interruptionが生じるバンドを報告してもよい。
端末20は、例1で説明したUL Tx switching用のBC内でswitchingするバンドの組み合わせ毎のpower boostingのサポート有無に関する情報を報告してもよい。
端末20は、例1で説明したUL Tx switching用のBC内でバンド切り替え可能なポート数(例:1 or 2)に関する情報を基地局10に報告してもよい。また、バンドが固定されるポートがある場合、バンドが固定されるポートの対象バンドを報告してもよい。例えば、端末20は基地局10に対して、バンドA-B-C-DのBCにおいてポート1はバンドA固定、などの情報を報告する。
端末20は、例1で説明したUL Tx switching用のBC内で各ポートにおける切り替え候補バンドに関する情報を報告してもよい。例えば、端末20は基地局10に対して、バンドA-B-C-DのBCにおいてポート1はA, Bが切り替え候補であり、ポート2はA, B, C, Dが切り替え候補である、などの情報を報告する。
第2実施形態において、端末20は、以下の例1~例9のうちの少なくともいずれか1つをRRCシグナリング、MAC-CE、及びDCIのうちのいずれかあるいは複数の組み合わせにより基地局10から設定又は指示される。また、例1~例9のうちのいずれか複数又は全部の組み合わせが基地局10から端末20に対して設定又は指示されてもよい。
端末20は、基地局10から、Rel-18 UL Tx switchingに用いるULを含むDL/UL serving cell(ULキャリアとDLキャリアを有するセル)、又は、Rel-18 UL Tx switchingに用いるULを含むUL only serving cell(ULキャリアのみのセル)を設定される。端末20は、基地局10から、Rel-18 UL Tx switchingに用いるULを含むDL/UL serving cell、及び、Rel-18 UL Tx switchingに用いるULを含むUL only serving cellの両方を設定されてもよい。ここで、「ある情報を設定される」とは、端末20が基地局10から当該情報を受信することである。
端末20は基地局10から、あるセルに対するServingCellConfigにより特定のIE/parameterを受信することで、当該特定のIE/parameterが端末20に設定される。
端末20は、基地局10から、あるセルに対するServingCellConfigにより特定のIE/parameterが設定されることで、そのセルがRel-18 UL Tx switchingに用いるUL only serving cellであることを認識してもよい。
端末20は、基地局10から、各serving cellにおいてswitching及び/又は同時送信が指示され得る他のserving cellに関する情報が設定される。例えば、ServingCellConfig内に、switching/同時送信が指示され得る他のserving cellの情報が含まれるとする。
端末20は、基地局10から、各serving cellにおいて他のserving cellとの組み合わせ毎にswitching periodを含むか否かに関する情報が設定されてもよい。あるいは他のserving cellとの組み合わせ毎ではなくserving cell単位で、あるいはcell group単位でswitching periodを含むか否かに関する情報が設定されてもよい。
端末20は、基地局10から、各serving cellにおいて他のserving cellとの組み合わせ毎に、power boostingしてよいかに関する情報が設定される。あるいは他のserving cellとの組み合わせ毎ではなくserving cell単位で、あるいはcell group単位でpower boostingしてよいかに関する情報が設定されてもよい。
端末20は、基地局10から、各serving cellにおいて他のserving cellとの組み合わせ毎に同時送信してよいかに関する情報が設定される。あるいは他のserving cellとの組み合わせ毎ではなく、serving cell単位で、あるいはcell group単位で同時送信してよいかに関する情報が設定されてもよい。serving cell単位での設定については、例えば、セルAに対する設定において、「同時送信OK」が設定された場合に、それはセルAとの組み合わせであれば、どのセルとの間でも同時送信がOkであることを意味してもよい。
端末20は、基地局10から、各serving cellにおいて他のserving cellとの組み合わせ毎に特定のポート構成から別の特定のポート構成への切り替えが指示された場合のcase解釈に関する情報が設定されてもよい。あるいは他のserving cellとの組み合わせ毎ではなくserving cell単位、あるいはcell group単位で特定のポート構成から別の特定のポート構成への切り替えが指示された場合のcase解釈に関する情報が設定されてもよい。
端末20は基地局10から、cell group単位でバンド切り替え対象のポート数に関する情報が設定される。これに加えて、あるいは、これに代えて、端末20は基地局10から、各serving cellがバンド切り替え対象のポートに紐づいているか否かに関する情報が設定されてもよい。また、端末20は基地局10から、各serving cellがバンド切り替え非対象のポートに紐づいているか否かに関する情報が設定されてもよい。
<前提及び課題>
3GPP Rel-18では、端末20の実装負荷や複雑性低減の観点から、バンド間で切り替えられるUL送信の最小間隔を規定するMinimum Separation Timeについて検討されている。
Rel-16, 17よりも極端に制約が増えたり、UEの実装負荷が高まったりすることは好ましくない。一方で、Rel-18では、3又は4バンドでのUL Tx switchingとなりRel-16, 17では想定されていないようなswitching遷移も起こり得る。
本実施形態では、UL Tx switching向けとして、複数段階のMinimum Separation Timeが規定される。複数段階とは、2段階でよいが、必ずしも2段階ではなく、さらに多くの段階のMinimum Separation Timeが規定されてもよい。ここでは、2段階のMinimum Separation Timeを想定する
Minimum Separation Timeは、M(Mは3以上の自然数)のバンド間において切り替えられる、時間方向において隣接する2つのUL Tx switchingに基づいて行われるUL送信間の最小間隔と解釈されてよい。Minimum Separation Timeは、当該2つのUL送信間の最小間隔を規定し、当該2つのUL送信を時間方向において分離する最小分離時間とも言える。
・特定の条件を満たすUL Tx switching間でのみ適用する
・上記2つの組み合わせ
このような長いMinimum Separation Timeは、第2最小間隔と呼ばれてもよい。例えば、図20に示すように、このような短いMinimum Separation Timeとして、Xシンボル以上のシンボル数が設定されてよい。
ベースラインの緩い(短い)Minimum Separation Timeとしては、次のオプションの少なくとも何れかが適用されてもよい。
ベースラインの緩い(短い)Minimum Separation Timeは、全てのUL送信に対して共通に適用されてよいが、厳しい(長い)Minimum Separation Time(Additional Minimum Separation Time)は、上述したように、特定のケースに限って適用されてよい。より具体的な特定のケースとしては、次のような例が含まれてよい。
・3又は4バンドUL Tx switching向けにdual ULをサポートするUE
・複数のバンド向けに最大2ポート(2ポートまで)をサポートするUE
・3又は4バンドが含まれるようなUL Tx switchingをサポートするUE(1T+1Tをサポートなど)
・Additional Minimum Separation Timeが必要であることを新たなcapabilityとして報告するUE
このように、端末20(UE)は、端末20の特定の能力情報を送信する場合、UL送信に対してAdditional Minimum Separation Time(第2最小間隔)を適用してもよい。
・3又は4バンドが含まれるようなUL Tx switching間
・Additional Minimum Separation Timeが必要であることが報告されたバンドあるいはバンドペアを含むUL Tx switching間
なお、特定のUE capabilityを報告するUEにのみ適用する例と、特定の条件を満たすUL Tx switching間でのみ適用する例との組合せに対して、Additional Minimum Separation Timeが適用されてもよい。
動作例1では、ベースラインの緩い(短い)Minimum Separation Timeに関する動作、動作例2では、厳しい(長い)Minimum Separation Time(Additional Minimum Separation Time)に関する動作についてそれぞれ説明したが、各動作例の一部が組み合わされた動作が適用されてもよいし、何れか動作例が部分的に適用されても構わない。
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。
図21は、基地局10の機能構成の一例を示す図である。図21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21に示される機能構成は一例に過ぎない。本発明の実施の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。また、送信部110と、受信部120とをまとめて通信部と称してもよい。
図22は、端末20の機能構成の一例を示す図である。図22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22に示される機能構成は一例に過ぎない。本発明の実施の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。送信部210と、受信部220をまとめて通信部と称してもよい。
(付記項1)
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンドの切り替えが可能なアンテナポートの数を能力情報として基地局に報告する送信部と、前記基地局から、バンドの切り替えが行われる対象となるアンテナポートに関する情報、又は、バンドの切り替えが行われる対象とならないアンテナポートに関する情報を受信する受信部とを備える端末。
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンドの切り替えが行われないアンテナポートが使用するバンドの情報を能力情報として基地局に報告する送信部と、前記基地局から、バンドの切り替えが行われる対象となるアンテナポートに関する情報、又は、バンドの切り替えが行われる対象とならないアンテナポートに関する情報を受信する受信部とを備える端末。
前記送信部は、バンドの切り替えが行われないアンテナポートがある場合に、当該アンテナポートが使用するバンドのMIMOレイヤ数を2として報告する付記項1又は2に記載の端末。
前記送信部は、各アンテナポートにおける切り替え候補のバンドに関する情報を報告する付記項1ないし3のうちいずれか1項に記載の端末。
端末における複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンドの切り替えが可能なアンテナポートの数を能力情報として前記端末から受信する受信部と、バンドの切り替えが行われる対象となるアンテナポートに関する情報、又は、バンドの切り替えが行われる対象とならないアンテナポートに関する情報を前記端末に送信する送信部とを備える基地局。
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンドの切り替えが可能なアンテナポートの数を能力情報として基地局に報告し、前記基地局から、バンドの切り替えが行われる対象となるアンテナポートに関する情報、又は、バンドの切り替えが行われる対象とならないアンテナポートに関する情報を受信する端末が実行する通信方法。
(付記項1)
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、当該送信切り替え方式で使用するバンドに関する情報を能力情報として基地局に報告する送信部と、複数のアンテナポートに関するある状態から、バンド切り替えにより、別の状態へ遷移する際に、遷移先の候補となる状態が複数個ある場合において、当該複数個の状態のうちの1つの状態を決定するための情報を前記基地局から受信する受信部とを備える端末。
前記受信部は、前記1つの状態を決定するための情報として、1つのバンドで送信に使用できる最大のアンテナポート数、又は、遷移前の状態と遷移先の状態の組を受信する付記項1に記載の端末。
前記送信部は、前記送信切り替え方式で使用するバンドでサポートするキャリア数を前記基地局に報告する付記項1又は2に記載の端末。
前記送信部は、前記送信切り替え方式で使用するバンドにおいて、下りキャリアが必要か否かに関する情報を報告する付記項1ないし3のうちいずれか1項に記載の端末。
端末における複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、当該送信切り替え方式で使用するバンドに関する情報を能力情報として端末から受信する受信部と、複数のアンテナポートに関するある状態から、バンド切り替えにより、別の状態へ遷移する際に、遷移先の候補となる状態が複数個ある場合において、当該複数個の状態のうちの1つの状態を決定するための情報を前記端末に送信する送信部とを備える基地局。
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、当該送信切り替え方式で使用するバンドに関する情報を能力情報として基地局に報告し、複数のアンテナポートに関するある状態から、バンド切り替えにより、別の状態へ遷移する際に、遷移先の候補となる状態が複数個ある場合において、当該複数個の状態のうちの1つの状態を決定するための情報を前記基地局から受信する端末が実行する通信方法。
(付記項1)
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、複数のアンテナポートで送信を行う場合にパワーブースティングが可能な否かを示す能力情報を基地局に報告する送信部と、前記基地局から、複数のアンテナポートで送信を行う場合にパワーブースティングをして良いか否かに関する情報を受信する受信部とを備える端末。
前記送信部は、バンドコンビネーション内の切り替えを行うバンドの組み合わせ毎、バンド毎、バンドコンビネーション内のバンドの全ての組み合わせ毎、又は、サポートする全てのバンドコンビネーションに対して、パワーブースティングが可能な否かを示す前記能力情報を前記基地局に報告する付記項1に記載の端末。
前記受信部は、サービングセルの組み合わせ毎、サービングセル毎、又は、セルグループ毎に、パワーブースティングをして良いか否かに関する情報を受信する付記項1又は2に記載の端末。
端末における複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、複数のアンテナポートで送信を行う場合にパワーブースティングが可能な否かを示す能力情報を前記端末から受信する受信部と、複数のアンテナポートで送信を行う場合にパワーブースティングをして良いか否かに関する情報を前記端末に送信する送信部とを備える基地局。
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、複数のアンテナポートで送信を行う場合にパワーブースティングが可能な否かを示す能力情報を基地局に報告し、前記基地局から、複数のアンテナポートで送信を行う場合にパワーブースティングをして良いか否かに関する情報を受信する端末が実行する通信方法。
(付記項1)
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、切り替え時に下り通信断が生じるバンドに関する能力情報を基地局に報告する送信部と、前記基地局から、上り送信のスケジューリングを行う制御情報を受信する受信部とを備える端末。
前記送信部は、バンドコンビネーション内において送信切り替えを行うバンドの組み合わせ毎、バンド毎、バンドコンビネーション内におけるバンドの全ての組み合わせ毎、又は、サポートする全てのバンドコンビネーションに対して、切り替え時に下り通信断が生じるバンドに関する前記能力情報を前記基地局に報告する付記項1に記載の端末。
前記送信部は、前記能力情報として、各ビットがバンドにおける下り通信断有無を示すビットマップを報告する付記項1又は2に記載の端末。
端末において複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、切り替え時に下り通信断が生じるバンドに関する能力情報を前記端末から受信する受信部と、上り送信のスケジューリングを行う制御情報を前記端末に送信する送信部とを備える基地局。
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、切り替え時に下り通信断が生じるバンドに関する能力情報を基地局に報告し、前記基地局から、上り送信のスケジューリングを行う制御情報を受信する端末が実行する通信方法。
(付記項1)
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンド間の切り替えにかかる切り替え時間を示す能力情報を基地局に報告する送信部と、前記基地局から、前記切り替え時間が発生するセルに関する情報を受信する受信部とを備える端末。
前記送信部は、バンドコンビネーション内の切り替えを行うバンドの組み合わせ毎、バンド毎、バンドコンビネーション内のバンドの全ての組み合わせ毎、又は、サポートする全てのバンドコンビネーションに対して、切り替え時間を示す前記能力情報を前記基地局に報告する付記項1に記載の端末。
前記受信部は、サービングセルの組み合わせ毎、サービングセル毎、又は、セルグループ毎に、前記切り替え時間が発生するセルに関する情報を受信する付記項1又は2に記載の端末。
端末における複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンド間の切り替えにかかる切り替え時間を示す能力情報を前記端末から受信する受信部と、前記切り替え時間が発生するセルに関する情報を前記端末に送信する送信部とを備える基地局。
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンド間の切り替えにかかる切り替え時間を示す能力情報を基地局に報告し、前記基地局から、前記切り替え時間が発生するセルに関する情報を受信する端末が実行する方法。
(付記項1)
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンド間で同時送信可能か否かを示す能力情報を基地局に報告する送信部と、前記基地局から、同時送信を行ってよいセルに関する情報を受信する受信部とを備える端末。
前記送信部は、バンドコンビネーション内の切り替えを行うバンドの組み合わせ毎、バンド毎、バンドコンビネーション内のバンドの全ての組み合わせ毎、又は、サポートする全てのバンドコンビネーションに対して、同時送信可能か否かを示す前記能力情報を前記基地局に報告する付記項1に記載の端末。
前記受信部は、サービングセルの組み合わせ毎、サービングセル毎、又は、セルグループ毎に、同時送信を行ってよいセルに関する情報を受信する付記項1又は2に記載の端末。
端末において複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンド間で同時送信可能か否かを示す能力情報を前記端末から受信する受信部と、同時送信を行ってよいセルに関する情報を前記端末に送信する送信部とを備える基地局。
複数のアンテナポートのうちの少なくとも1つのアンテナポートが、2以上の数のバンドにわたって、バンドを切り替えることができ、複数のアンテナポートの合計で3以上のバンドにわたって送信に用いるバンドを切り替える送信切り替え方式において、バンド間で同時送信可能か否かを示す能力情報を基地局に報告し、前記基地局から、同時送信を行ってよいセルに関する情報を受信する端末が実行する通信方法。
(付記項1)
M(Mは3以上の自然数)のバンドの中から選択されたバンドであってN(NはM以下の自然数)のバンドを用いたアップリンク送信を制御する制御部と、前記Mのバンド間において切り替えられる前記アップリンク送信に、第1最小間隔又は前記第1最小間隔よりも長い第2最小間隔が適用された前記アップリンク送信を実行する送信部とを備え、前記制御部は、特定の前記アップリンク送信に対して前記第2最小間隔を適用する端末。
前記制御部は、前記Mのバンドのアクティブな帯域幅部分のサブキャリア間隔に基づいて、前記第1最小間隔又は前記第2最小間隔の少なくとも何れかを設定する請求項1に記載の端末。
前記制御部は、全ての前記アップリンク送信に対して前記第1最小間隔を適用する請求項1に記載の端末。
前記制御部は、前記端末の特定の能力情報を送信する場合、前記アップリンク送信に対して前記第2最小間隔を適用する請求項3に記載の端末。
M(Mは3以上の自然数)のバンドの中から選択されたバンドであってN(NはM以下の自然数)のバンドを用いたアップリンク受信を実行する受信部と、前記Mのバンド間において切り替えられる前記アップリンク受信に、第1最小間隔又は前記第1最小間隔よりも長い第2最小間隔の適用を想定する制御部とを備え、前記制御部は、特定の前記アップリンク受信に対して前記第2最小間隔が適用されると想定する基地局。
M(Mは3以上の自然数)のバンドの中から選択されたバンドであってN(NはM以下の自然数)のバンドを用いたアップリンク送信を制御するステップと、前記Mのバンド間において切り替えられる前記アップリンク送信に、第1最小間隔又は前記第1最小間隔よりも長い第2最小間隔が適用された前記アップリンク送信を実行するステップとを含み、前記アップリンク送信を実行するステップでは、特定の前記アップリンク送信に対して前記第2最小間隔を適用する通信方法。
上記実施形態の説明に用いたブロック図(図21及び図22)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、本発明の実施の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。本発明の実施の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発明の実施の形態に従って端末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)
- M(Mは3以上の自然数)のバンドの中から選択されたバンドであってN(NはM以下の自然数)のバンドを用いたアップリンク送信を制御する制御部と、
前記Mのバンド間において切り替えられる前記アップリンク送信に、第1最小間隔又は前記第1最小間隔よりも長い第2最小間隔が適用された前記アップリンク送信を実行する送信部と
を備え、
前記制御部は、特定の前記アップリンク送信に対して前記第2最小間隔を適用する端末。 - 前記制御部は、前記Mのバンドのアクティブな帯域幅部分のサブキャリア間隔に基づいて、前記第1最小間隔又は前記第2最小間隔の少なくとも何れかを設定する請求項1に記載の端末。
- 前記制御部は、全ての前記アップリンク送信に対して前記第1最小間隔を適用する請求項1に記載の端末。
- 前記制御部は、前記端末の特定の能力情報を送信する場合、前記アップリンク送信に対して前記第2最小間隔を適用する請求項3に記載の端末。
- M(Mは3以上の自然数)のバンドの中から選択されたバンドであってN(NはM以下の自然数)のバンドを用いたアップリンク受信を実行する受信部と、
前記Mのバンド間において切り替えられる前記アップリンク受信に、第1最小間隔又は前記第1最小間隔よりも長い第2最小間隔の適用を想定する制御部とを備え、
前記制御部は、特定の前記アップリンク受信に対して前記第2最小間隔が適用されると想定する基地局。 - M(Mは3以上の自然数)のバンドの中から選択されたバンドであってN(NはM以下の自然数)のバンドを用いたアップリンク送信を制御するステップと、
前記Mのバンド間において切り替えられる前記アップリンク送信に、第1最小間隔又は前記第1最小間隔よりも長い第2最小間隔が適用された前記アップリンク送信を実行するステップと
を含み、
前記アップリンク送信を実行するステップでは、特定の前記アップリンク送信に対して前記第2最小間隔を適用する通信方法。
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Non-Patent Citations (4)
| Title |
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| CATT: "Discussion on Multi-carrier UL Tx switching scheme", 3GPP DRAFT; R1-2208992, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20221010 - 20221019, 30 September 2022 (2022-09-30), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052276912 * |
| LG ELECTRONICS: "Discussion on Multi-carrier UL Tx switching scheme", 3GPP DRAFT; R1-2209455, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20221010 - 20221019, 30 September 2022 (2022-09-30), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052277374 * |
| SHINYA KUMAGAI, NTT DOCOMO, INC.: "Discussion on Multi-carrier UL Tx switching scheme", 3GPP DRAFT; R1-2211999; TYPE DISCUSSION; NR_MC_ENH-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Toulouse, FR; 20221114 - 20221118, 7 November 2022 (2022-11-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052222563 * |
| SUKCHEL YANG, LG ELECTRONICS: "Discussion on Multi-carrier UL Tx switching scheme", 3GPP DRAFT; R1-2212304; TYPE DISCUSSION; NR_MC_ENH-CORE, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. 3GPP RAN 1, no. Toulouse, FR; 20221114 - 20221118, 7 November 2022 (2022-11-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052222862 * |
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