WO2022157953A1 - 端末、基地局、および、通信方法 - Google Patents
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
Definitions
- the present disclosure relates to terminals, base stations, and communication methods that perform wireless communication.
- the 3rd Generation Partnership Project (3GPP) has specified the 5th generation mobile communication system (also called 5G, New Radio (NR) or Next Generation (NG)), and the next generation specification called Beyond 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G We are also proceeding with 5G, 5G Evolution or 6G
- Candidates for consideration for Beyond 5G and 6G include the development of new frequency bands (frequency bands of 100 GHz or higher, terahertz bands, etc.), further speedup in existing 5G frequency bands (100 GHz or lower) (e.g. narrow beam, coordinated transmission/reception between base stations, coordinated transmission/reception between terminals, etc.), reduction of power consumption of mobile terminals and mobile base stations, realization of long-term non-charging use, and the like.
- new frequency bands frequency bands of 100 GHz or higher, terahertz bands, etc.
- further speedup in existing 5G frequency bands 100 GHz or lower
- narrow beam coordinated transmission/reception between base stations, coordinated transmission/reception between terminals, etc.
- reduction of power consumption of mobile terminals and mobile base stations realization of long-term non-charging use, and the like.
- Non-Patent Document 1 Non-Patent Document 1
- DRX Discontinuous Reception: intermittent reception
- PDCCH Physical Downlink Control. CHannel
- AGC Automatic Gain Control
- CSI Channel-state Control
- the resource that monitors the PDCCH is set as CORESET, and narrowing this bandwidth will reduce the PDCCH capacity.
- power saving WI Work Item
- group common PDCCH DCI format 2_6 wake-up function
- An object is to provide a terminal, a base station, and a communication method that can realize
- control unit 240 that sets band resources narrower than the normal minimum unit when a specific condition is satisfied or a specific notification is received, and the set band resource and a receiving unit (radio communication unit 210) that performs receiving operations including monitoring.
- control unit 140 that allocates band resources narrower than the normal minimum unit to the terminal, and a transmission unit that transmits a notification regarding narrow band resource allocation to the terminal (radio communication unit 110) and a base station (base station 100).
- one aspect of the present disclosure is, when a specific condition is met or when a specific notification is received, a step of setting a band resource narrower than the normal minimum unit, and monitoring is performed in the set band resource. and a step of performing a receiving operation.
- one aspect of the present disclosure includes a step of allocating band resources that are narrower than the normal minimum unit to the terminal (UE200), and a step of transmitting a notification regarding the narrow band resource allocation to the terminal (UE200). communication method in a base station (base station 100).
- FIG. 1 is an overall schematic configuration diagram of a radio communication system 10.
- FIG. 2 is a schematic functional block configuration diagram of the gNB100.
- FIG. 3 is a schematic functional block configuration diagram of UE200.
- FIG. 4 is a diagram showing the difference between conventional communication and B5G (Beyond 5G)/6G communication.
- FIG. 5 is a diagram showing the relationship between DRX state/Active state and monitoring in Release-16 NR.
- FIG. 6 is a diagram showing an operation example of base station 100 and UE 200 in this embodiment.
- FIG. 7 is a diagram showing an example of the hardware configuration of the UE200.
- FIG. 1 is an overall schematic configuration diagram of a radio communication system 10 according to the present embodiment.
- the radio communication system 10 is a radio communication system conforming to 5G New Radio (NR) or 6G (may be referred to as Beyond 5G), Next Generation-Radio Access Network 20 (hereinafter, NG-RAN 20 and terminal 200 (hereinafter referred to as UE200, User Equipment).
- NR New Radio
- 6G 6G
- NG-RAN 20 and terminal 200 hereinafter referred to as UE200, User Equipment
- NG-RAN 20 includes a radio base station 100 (hereinafter gNB 100 or base station 100).
- gNB 100 radio base station 100
- the specific configuration of the radio communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.
- NG-RAN 20 actually includes multiple NG-RAN Nodes, specifically gNBs (or ng-eNBs), and is connected to core networks (5GC, 6GC not shown) according to 5G or 6G.
- NG-RAN 20 and 5GC or 6GC may simply be referred to as a "network”.
- the gNB100 is a 5G or 6G radio base station, and performs 5G/6G radio communication with the UE200.
- the gNB100 and UE200 combine Massive MIMO (Multiple-Input Multiple-Output) and multiple component carriers (CC) to generate highly directional beams by controlling radio signals transmitted from multiple antenna elements.
- Massive MIMO Multiple-Input Multiple-Output
- CC component carriers
- Dual Connectivity (DC) with simultaneous communication between the UE and each of the two NG-RAN Nodes, and radio backhaul between radio communication nodes such as gNBs and radio access to the UE It can correspond to Integrated Access and Backhaul (IAB) etc.
- IAB Integrated Access and Backhaul
- the wireless communication system 10 supports FR1 and FR2.
- the frequency bands of each FR are as follows. ⁇ FR1: 410MHz to 7.125GHz ⁇ FR2: 24.25 GHz to 52.6 GHz
- SCS Sub-Carrier Spacing
- BW bandwidth
- FR2 is a higher frequency than FR1 and may use an SCS of 60 or 120 kHz (240 kHz may be included) and a bandwidth (BW) of 50-400 MHz.
- new frequency bands for 6G may be used.
- the wireless communication system 10 may support frequency bands above 52.6 GHz and up to 114.25 GHz.
- SCS may be interpreted as numerology. Numerology is defined in 3GPP TS38.300 and corresponds to one subcarrier spacing in the frequency domain.
- the high frequency band may be further divided. For example, it may be divided into a frequency range below 71 GHz and a frequency range above 71 GHz. Particularly in such a high frequency band, an increase in phase noise between carriers becomes a problem. This may require the application of a larger (wider) SCS or a single carrier waveform.
- the type of DC may be Multi-RAT Dual Connectivity (MR-DC), which uses multiple radio access technologies, or NR-NR Dual Connectivity (NR-DC), which uses only NR.
- MR-DC may also be E-UTRA-NR Dual Connectivity (EN-DC), where eNB constitutes the master node (MN) and gNB constitutes the secondary node (SN), or vice versa NR -E-UTRA Dual Connectivity (NE-DC) is acceptable.
- a master cell group (MCG) and a secondary cell group (SCG) may be set in the DC.
- the MCG may include a primary cell (PCell), and the SCG may include a secondary cell (SCell).
- the SCell may include a primary/secondary cell (PSCell).
- PSCell is a type of SCell, but may be interpreted as a special SCell having functions equivalent to those of a PCell.
- PUCCH Physical Uplink Control Channel
- CBRA contention type random access procedure
- Radio Link Monitoring downlink radio quality monitoring
- FIG. 2 is a schematic functional block configuration diagram of gNB100
- FIG. 3 is a schematic functional block configuration diagram of UE200.
- FIG. 2 is a functional block configuration diagram of the radio base station 100.
- the radio base station 100 includes a radio communication section 110, a measurement report processing section 120, a control signal/reference signal processing section 130, and a control section 140.
- FIG. 1 is a functional block configuration diagram of the radio base station 100.
- the radio base station 100 includes a radio communication section 110, a measurement report processing section 120, a control signal/reference signal processing section 130, and a control section 140.
- the wireless communication unit 110 transmits and receives wireless signals according to 5G or 6G. Specifically, the radio communication unit 110 transmits downlink signals (DL signals) according to 5G/6G and receives uplink signals (UL signals) according to 5G/6G.
- DL signals downlink signals
- UL signals uplink signals
- the radio communication unit 110 may constitute a transmission unit that transmits a notification regarding band resource allocation to the UE 200 terminal. Also, radio communication section 110 may transmit a reference signal or the like to UE 200 in the allocated band. Also, the radio communication unit 110 may receive from the UE 200 a measurement report of radio quality or the like based on a reference signal or the like.
- the radio communication unit 110 supports dual connectivity and transmits and receives radio signals via a cell group, specifically, a cell included in an MCG (master cell group) and/or an SCG (secondary cell group).
- a cell group specifically, a cell included in an MCG (master cell group) and/or an SCG (secondary cell group).
- the measurement report processing unit 120 executes processing related to measurement reports transmitted from the UE200.
- the measurement report processing unit 120 performs processing related to measurement reports including the reception quality of reference signals and the like in a band narrower than the normal minimum unit (hereinafter referred to as "ultra-narrow band") by the UE 200.
- the wireless communication unit 110 may configure a receiving unit that receives measurement reports from terminals.
- the reception quality may include at least one of RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), and SINR (Signal-to-Interference plus Noise power Ratio).
- RSRP Reference Signal Received Power
- RSRQ Reference Signal Received Quality
- SINR Signal-to-Interference plus Noise power Ratio
- the control signal/reference signal processing unit 130 executes processing related to various control signals transmitted/received by the wireless communication unit 110 and processing related to various reference signals transmitted/received by the wireless communication unit 110.
- control signal/reference signal processing unit 130 receives various control signals transmitted from the radio communication unit 110 via a predetermined control channel, for example, radio resource control layer (RRC) control signals. . Further, the control signal/reference signal processing unit 130 transmits various control signals to the wireless communication unit 110 via a predetermined control channel.
- the control signal/reference signal processing unit 130 can receive UE Capability Information of the UE 200 from the UE 200 .
- the control signal/reference signal processing unit 130 may configure a receiving unit that receives the capability information from the UE 200 .
- the capability information may include at least band-related capabilities, such as frequency bands to which the UE 200 can be connected, and band resource setting capabilities (eg, capability to support ultra-narrow bands). Note that the capability information is not limited to such band capability of the UE 200, and may include, for example, transmission power, transmission beam, antenna capability, and the like.
- the channels may include control channels and data channels.
- Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel, Downlink Control Information (DCI) including Random Access Radio Network Temporary Identifier (RA-RNTI)), and Physical Broadcast Channel (PBCH) etc. may be included.
- PDCCH Physical Downlink Control Channel
- PUCCH Physical Uplink Control Channel
- RACH Random Access Channel
- DCI Downlink Control Information
- RA-RNTI Random Access Radio Network Temporary Identifier
- PBCH Physical Broadcast Channel
- data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel).
- Data may refer to data transmitted over a data channel.
- the control signal/reference signal processing unit 130 executes processing using reference signals (RS) such as Demodulation Reference Signal (DMRS) and Channel State Information-Reference Signal (CSI-RS).
- RS reference signals
- DMRS Demodulation Reference Signal
- CSI-RS Channel State Information-Reference Signal
- a DMRS is a known reference signal (pilot signal) between a terminal-specific base station and a terminal for estimating the fading channel used for data demodulation.
- CSI-RS is a downlink reference signal for channel state measurement.
- reference signals may include Phase Tracking Reference Signal (PTRS), Sounding Reference Signal (SRS), and Positioning Reference Signal (PRS) for position information. That is, the reference signal transmitted by the radio base station 100 and the reference signal transmitted by the UE 200 (received by the radio base station 100) may be included.
- PTRS Phase Tracking Reference Signal
- SRS Sounding Reference Signal
- PRS Positioning Reference Signal
- control signal/reference signal processing unit 130 can transmit and receive reference signals to and from the UE 200.
- control signal/reference signal processing unit 130 may configure a transmission/reception unit that transmits/receives reference signals.
- the control unit 140 controls each functional block that configures the radio base station 100.
- the control unit 140 allocates to the UE 200 resources related to bands including bands (ultra-narrow bands) narrower than normal minimum units and time.
- the control unit 140 allocates the number of resource blocks (RB) to the user equipment 300 (usually 1 to several resource blocks, but in particular, in the present embodiment, less than 1 resource block). It may be a resource of one or several subcarriers), transport block size (TBS), modulation scheme, etc.
- control unit 140 is not limited to allocating one ultra-narrowband resource for each UE 200, and allocates resources for each cell, each beam, each cell group (CG), or each specific cell. may
- control unit 140 may allocate more resources than the normal minimum resource allocation unit (eg, 1 symbol) in the time direction. For example, a symbol length different from the SCS symbol length supported by the UE 200 (for example, a longer symbol length) may be allocated, or the number of symbols greater than 1 may be the minimum resource allocation unit in the time direction.
- the normal minimum resource allocation unit e.g. 1 symbol
- control unit 140 may allocate ultra-narrowband resources when specific conditions such as DRX state, IDLE state, or the like are satisfied for specific uses (monitoring, etc.). On the contrary, the control unit 140 allocates band resources wider than ultra-narrow band resources when other specific conditions such as a non-DRX state, a non-IDLE state, etc. are satisfied for specific uses (data communication, etc.). good too. As a premise, control section 140 may allocate ultra-narrowband resources only when receiving capability information from UE 200 or the like indicating that ultra-narrowband resources can be used.
- control section 140 provides TDM (time division multiplexing), FDM (frequency division multiplexing), CDM (code division multiplexing), SDM (space division multiplexing), or a combination of resources for each of a plurality of UEs 200.
- TDM time division multiplexing
- FDM frequency division multiplexing
- CDM code division multiplexing
- SDM space division multiplexing
- resources may be assigned, and resources may be assigned so that multiple UEs 200 can share them. For example, resources may be allocated to common UEs within a cell, common UEs within the same base station beam, or common UEs within a UE group set by the base station.
- the control unit 140 may estimate the position, direction, etc. of the UE 200 based on the measurement report received from the UE 200. Thereby, for example, the control unit 140 can select and transmit a beam with better reception quality for the UE 200 .
- FIG. 3 is a functional block configuration diagram of UE200.
- UE 200 includes radio communication section 210 , control signal/reference signal processing section 220 , quality measurement section 230 and control section 240 .
- the wireless communication unit 210 transmits and receives wireless signals according to 5G or 6G. Specifically, the radio communication unit 210 transmits an uplink signal (UL signal) according to 5G/6G and receives a downlink signal (DL signal) according to 5G/6G.
- UL signal uplink signal
- DL signal downlink signal
- radio communication section 210 may constitute a receiving section that receives a notification from base station 100, and serves as a transmitting section that transmits to the base station capability information regarding the ability to set band resources such as ultra-narrowband. may be configured.
- the wireless communication unit 210 may be configured as a transmission/reception unit that performs reception and/or transmission operations for uses including monitoring using the band resources set by the control unit 240 .
- the radio communication unit 210 can support Massive MIMO, CA that bundles multiple CCs, and DC that simultaneously communicates between the UE and each of the two RAN Nodes.
- the control signal/reference signal processing unit 220 executes processing related to various control signals transmitted and received by the UE 200 and processing related to various reference signals transmitted and received by the UE 200. Note that the control signal or reference signal processed by the control signal/reference signal processing unit 220 is transmitted/received via the wireless communication unit 210 . Therefore, the control signal/reference signal processing unit 220 can monitor the reference signal and the like using the band resource set by the control unit 240. FIG.
- control signal/reference signal processing unit 220 receives various control signals transmitted from the radio base station 100 via a predetermined control channel, for example, radio resource control layer (RRC) control signals. Also, the control signal/reference signal processing unit 220 transmits various control signals to the radio base station 100 via a predetermined control channel.
- RRC radio resource control layer
- the control signal/reference signal processing unit 220 executes processing using reference signals (RS) such as DMRS and PTRS.
- RS reference signals
- a DMRS is a known reference signal (pilot signal) between a terminal-specific base station and a terminal for estimating a fading channel used for data demodulation.
- PTRS is a terminal-specific reference signal for estimating phase noise, which is a problem in high frequency bands.
- reference signals may include Channel State Information-Reference Signal (CSI-RS), Sounding Reference Signal (SRS), Positioning Reference Signal (PRS) for position information, and the like.
- CSI-RS Channel State Information-Reference Signal
- SRS Sounding Reference Signal
- PRS Positioning Reference Signal
- control signal/reference signal processing unit 220 can perform processing related to the UE 200 capability information (UE Capability Information). For example, the control signal/reference signal processing unit 220 can transmit capability information (UE Capability Information) in response to a capability information inquiry (UE Capability Inquiry) from the radio base station 100 .
- UE Capability Information capability information
- UE Capability Inquiry capability information inquiry
- the quality measurement unit 230 measures radio quality etc. based on the reference signal etc. from the base station 200 . As described above, reference signals and the like are obtained in the band resources set by control section 240, so quality measurement section 230 can perform monitoring in the set band.
- the quality measurement unit 230 can measure the reception quality using a synchronization signal block (SSB: SS/PBCH Block) or CSI-RS.
- the reception quality may include at least one of RSRP, RSRQ, and SINR, as described above.
- Quality measurement section 230 may measure the reception quality of the serving cell of UE 200 and neighboring cells.
- RSRP is the reception level of the reference signal measured by the UE 200
- RSRQ is the reception quality of the reference signal measured by the UE 200 (the ratio of the power of the cell-specific reference signal to the total power within the reception bandwidth). may be interpreted).
- SSB based RRM Measurement Timing Configuration a measurement window called SSB based RRM Measurement Timing Configuration (SMTC) that can be set for each carrier (which may also be called a subcarrier) may be used.
- SMTC Measurement Timing Configuration
- the SMTC window enables the network (radio base station 100) may be interpreted as a measurement window set for the UE 200 allocated as a resource from .
- the control unit 240 controls each functional block that configures the UE200.
- the control unit 240 sets resources such as ultra-narrowband resources when a specific condition is satisfied or when a specific notification is received.
- the specific notification is notification regarding resource allocation, such as ultra-narrowband resources, received from base station 100 .
- Control unit 240 resets the resource by switching from the set ultra-narrow band resource to the wide band resource when another condition is satisfied or when another specific notification is received. You may Specific examples of specific conditions will be described later.
- control unit 240 performs transmission of capability information (UE Capability Information) by the control signal/reference signal processing unit 220, transmission and reception of reference signals, and measurement of reception quality (RSRP, RSRQ and SINR) by the quality measurement unit 230. may be executed.
- UE Capability Information capability information
- RSRP, RSRQ and SINR reception quality
- FIG. 4 is a diagram showing the difference between conventional communication and communication in B5G (Beyond 5G)/6G.
- FIG. 5 is a diagram showing the relationship between DRX state/Active state and monitoring in Release-16 NR.
- the Wakeup function using group common PDCCH (DCI format 2_6) in Power saving WI instructs the UE to skip PDCCH monitoring during DRX on-duration.
- FIG. 6 is a diagram showing an operation example of base station 100 and UE 200 in the present embodiment.
- the UE 200 transmits capability information to the base station 100 to report on the capability of the terminal regarding monitoring of ultra-narrowband resources.
- the base station 100 receives capability information indicating that monitoring of ultra-narrowband resources is possible from the UE 200, it allocates ultra-narrowband resources to the UE 200, and uses the allocated ultra-narrowband resources. A notification is sent to the UE 200 instructing it to perform monitoring.
- the UE 200 When the UE 200 satisfies a specific condition such as when receiving the above notification from the base station 100, it sets ultra-narrowband resources and starts monitoring.
- the base station 100 transmits to the UE 200 a notification instructing communication such as monitoring in a band wider than the ultra-narrow band resource.
- a notification instructing communication such as monitoring in a band wider than the ultra-narrow band resource.
- the UE 200 switches the band from the ultra-narrow band to perform communication such as monitoring.
- the above is an example of the operations of the base station 100 and the UE 200 in this embodiment. Note that the base station 100 and the UE 200 may perform the following operations in addition/or instead of the above.
- Operation example 1 For example, it may be possible to allocate ultra-narrowband resources of less than 1 RB (for example, 1 subcarrier) from the base station 100 to the UE 200 terminal.
- 1 RB for example, 1 subcarrier
- Ultra-narrowband resources may be set for each UE by RRC signaling, may be set for each cell by SIB or the like, or may be set for a beam (SSB index or CSI-RS resource index).
- Ultra-narrow band resource setting information includes frequency start position, frequency resource amount (bandwidth), time resource start position (cycle/timing), and time resource amount (symbol or number of slots). may include at least one of (Operation example 1-2-2)
- the resources monitored by the terminal (UE 200) may be derived based only on the explicit (Explicit) setting information as described above, or It may be derived based on a combination of the setting information and the contents defined by the specification (implicit information).
- the terminal 200 may assume at least one of the following as the “specific notification #2” from the base station 100 and perform monitoring.
- (Operation example 2-1-1) Transmission or non-transmission of a known modulation symbol sequence (known sequence) of a specific pattern on ultra-narrowband resources (Operation example 2-1-2) By differential modulation on ultra-narrowband resources Existence and content of information symbol string of predetermined size to be transmitted (operation example 2-1-3) Presence and content of information symbol string of predetermined size to be transmitted on ultra-narrowband resource
- the terminal 200 may assume a synchronization reference signal other than the “specific notification #2” from the base station 100.
- (Operation example 2-3-1) When a condition defined by the specification is satisfied, such as when no data transmission/reception instruction is received for a predetermined period (Operation example 2-3-2)
- a predetermined condition set by the base station When satisfied (operation example 2-3-3) when receiving an instruction to enter the DRX state, or when satisfying the conditions (operation example 2-3-4) when receiving a specific instruction after entering the DRX state , or when a specific condition is met (operation example 2-3-5) when it enters the IDLE state
- Operation example 3 (Operation example 3)
- the terminal (UE 200) that has detected the specific notification #2 ((3) in FIG. 6) switches the monitoring band to a band wider than the ultra-narrow band, and at least one of another notification and reference signal. monitoring operation.
- At least one of the minimum delay time and the maximum delay time required for switching the monitoring band is specified. good too.
- the delay time may include at least one of frequency retuning time and BWP (Bandwidth Part) switching time.
- BWP Bandwidth Part
- the time for performing tracking, AGC, etc. may be included.
- “At least one of another notification/reference signal” may be any of the following.
- Downlink control channel such as PDCCH (Operation example 3-2-2)
- Downlink synchronization signal/broadcast channel such as SSB (Operation example 3-2-3) CSI-RS, TRS, etc.
- Operation example 4 (Operation example 4)
- the terminal may report as capability information about at least one of the supportability of the monitoring operation in the ultra-narrowband resource and the supportability of each related parameter.
- Operaation example 4-2 The following capability information regarding monitoring operation in ultra-narrowband resources may be reported (Operation example 4-2-1) Monitoring cycle (interval)/Period (Operation example 4-2-2 ) number of monitoring resources (or number of simultaneous monitoring carriers in ultra-narrowband resources)
- the ultra-narrowband resources monitored by different users may be any or a combination of TDM, FDM, CDM, and SDM, or may be shared by a plurality of users.
- Operation example 6 (Operation example 6) Symbol length on ultra-narrowband resource A symbol length that is the same as the symbol length of any of the SCSs supported by the terminal 200 may be used, or a symbol length that is different from the symbol length of the SCS that the terminal supports (for example, a longer symbol length) may be used.
- the specific notification is notification regarding narrowband resource allocation from the base station (gNB 100).
- a band (ultra-narrow band) narrower than the usual minimum unit is less than one resource block or one or several subcarriers.
- control unit switches from the set narrowband resource to the wideband resource when another condition is satisfied or when another specific notification is received.
- a transmission section (radio communication section 210) that transmits to the base station 100 capability information regarding the ability to set band resources narrower than the usual minimum unit is further provided.
- the base station 100 can grasp whether the terminal supports ultra-narrowband or the like.
- the base station (gNB100) transmits to the terminal (UE200) a control unit (140) that allocates band resources that are narrower than the normal minimum unit, and a notification regarding narrow band resource allocation to the terminal (UE200). and a transmission unit (radio communication unit 110).
- a reception operation is performed for monitoring purposes
- a data reception operation may be performed for low-dose data communication for IoT (Internet of Things). It is.
- each functional block may be implemented using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separate devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
- a functional block may be implemented by combining software in the one device or the plurality of devices.
- Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't
- a functional block (component) that performs transmission is called a transmitting unit or transmitter.
- the implementation method is not particularly limited.
- FIG. 7 is a diagram showing an example of the hardware configuration of base station 100 or UE 200.
- base station 100 or UE 200 may be configured as a computing device including processor 1001, memory 1002, storage 1003, communication device 1004, input device 1005, output device 1006, bus 1007, and the like.
- the term "apparatus” can be read as a circuit, device, unit, or the like.
- the hardware configuration of the device may be configured to include one or more of each device shown in the figure, or may be configured without some of the devices.
- Each functional block of the UE200 (see FIG. 3) is realized by any hardware element of the computer device or a combination of the hardware elements.
- each function in the UE 200 is performed by causing the processor 1001 to perform calculations, controlling communication by the communication device 1004, and controlling communication by the communication device 1004 by loading predetermined software (programs) onto hardware such as the processor 1001 and the memory 1002. and by controlling at least one of reading and writing data in the storage 1003 .
- a processor 1001 operates an operating system and controls the entire computer.
- the processor 1001 may be configured by a central processing unit (CPU) including interfaces with peripheral devices, a control unit, an arithmetic unit, registers, and the like.
- CPU central processing unit
- the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
- programs program codes
- software modules software modules
- data etc.
- the various processes described above may be executed by one processor 1001, or may be executed by two or more processors 1001 simultaneously or sequentially.
- Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.
- the memory 1002 is a computer-readable recording medium, and is composed of at least one of Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), Random Access Memory (RAM), etc. may be
- ROM Read Only Memory
- EPROM Erasable Programmable ROM
- EEPROM Electrically Erasable Programmable ROM
- RAM Random Access Memory
- the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
- the memory 1002 can store programs (program code), software modules, etc. capable of executing a method according to an embodiment of the present disclosure.
- the storage 1003 is a computer-readable recording medium, for example, an optical disc such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disk), smart card, flash memory (eg, card, stick, key drive), floppy disk, magnetic strip, and/or the like.
- Storage 1003 may also be referred to as an auxiliary storage device.
- the recording medium described above may be, for example, a database, server, or other suitable medium including at least one of memory 1002 and storage 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 called a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc., for realizing at least one of frequency division duplex (FDD) and time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
- the output device 1006 is an output device (eg, display, speaker, LED lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
- each device such as the processor 1001 and the memory 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 devices.
- the device includes hardware such as a microprocessor, digital signal processor (DSP), application specific integrated circuit (ASIC), programmable logic device (PLD), field programmable gate array (FPGA), etc.
- DSP digital signal processor
- ASIC application specific integrated circuit
- PLD programmable logic device
- FPGA field programmable gate array
- 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 can be performed through physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI), higher layer signaling (e.g., RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block (MIB), System Information Block (SIB), other signals, or combinations thereof
- RRC signaling may also be referred to as RRC messages, e.g., RRC Connection Setup ) message, RRC Connection Reconfiguration message, or the like.
- LTE Long Term Evolution
- LTE-A LTE-Advanced
- SUPER 3G IMT-Advanced
- 4G 4th generation mobile communication system
- 5G 5th generation mobile communication system
- Future Radio Access FAA
- New Radio NR
- W-CDMA registered trademark
- GSM registered trademark
- CDMA2000 Code Division Multiple Access 2000
- UMB Ultra Mobile Broadband
- IEEE 802.11 Wi-Fi (registered trademark)
- IEEE 802.16 WiMAX®
- IEEE 802.20 Ultra-WideBand (UWB), Bluetooth®, and other suitable systems, and extended next-generation systems based on these (B5G/ 6G, etc.
- a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
- a specific operation that is performed by a base station in the present disclosure may be performed by its upper node in some cases.
- various operations performed for communication with a terminal may be performed by the base station and other network nodes other than the base station (e.g. MME or S-GW, etc., but not limited to).
- MME or S-GW network nodes
- the case where there is one network node other than the base station is exemplified above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).
- Information, signals can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.
- Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input and output information may be overwritten, updated, or appended. The output information may be deleted. The entered information may be transmitted to other devices.
- the determination may be made by a value represented by one bit (0 or 1), by a true/false value (Boolean: true or false), or by numerical comparison (for example, a predetermined value).
- notification of predetermined information is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.
- Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
- software, instructions, information, etc. may be transmitted and received via a transmission medium.
- the Software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) to access websites, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.
- wired technology coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.
- wireless technology infrared, microwave, etc.
- data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
- the channel and/or symbols may be signaling.
- a signal may also be a message.
- a component carrier may also be called a carrier frequency, a cell, a frequency carrier, or the like.
- system and “network” used in this disclosure are used interchangeably.
- information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information.
- radio resources may be indexed.
- base station BS
- radio base station fixed station
- NodeB NodeB
- eNodeB eNodeB
- gNodeB gNodeB
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
- a base station can accommodate one or more (eg, three) cells (also called sectors). When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area corresponding to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head: RRH) can also provide communication services.
- a base station subsystem e.g., a small indoor base station (Remote Radio)
- Head: RRH can also provide communication services.
- cell refers to part or all of the coverage area of at least one of a base station and base station subsystem that provides communication services in this coverage.
- MS Mobile Station
- UE User Equipment
- a mobile station is defined 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 It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
- At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
- At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
- the mobile body may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile body (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
- at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
- at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a mobile station (user terminal, hereinafter the same).
- communication between a base station and a mobile station is replaced with communication between multiple mobile stations (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
- the mobile station may have the functions that the base station has.
- words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
- uplink channels, downlink channels, etc. may be read as side channels.
- a mobile station in the present disclosure may be read as a base station.
- the base station may have the functions that the mobile station has.
- a radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe.
- a subframe may also consist of one or more slots in the time domain.
- a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
- a numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, transmission and reception specific filtering operations performed by the receiver in the frequency domain, specific windowing operations performed by the transceiver in the time domain, and/or the like.
- SCS subcarrier spacing
- TTI transmission time interval
- number of symbols per TTI radio frame structure
- transmission and reception specific filtering operations performed by the receiver in the frequency domain specific windowing operations performed by the transceiver in the time domain, and/or the like.
- a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbols, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, etc.) in the time domain.
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- a slot may be a unit of time based on numerology.
- a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) that is transmitted in time units larger than a minislot may be referred to as PDSCH (or PUSCH) mapping type A.
- PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.
- Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.
- 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. That is, at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, may be a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms may be Note that the unit representing the TTI may be called a slot, minislot, or the like instead of a subframe.
- TTI refers to, for example, the minimum scheduling time unit in wireless communication.
- a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
- radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
- the TTI may be a transmission time unit for channel-encoded data packets (transport blocks), code blocks, codewords, etc., or may be a processing unit for scheduling, link adaptation, etc. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
- one slot or one minislot is called a TTI
- one or more TTIs may be the minimum scheduling time unit.
- the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
- a TTI with a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI that is shorter than a regular TTI may also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and so on.
- long TTI for example, normal TTI, subframe, etc.
- short TTI for example, shortened TTI, etc.
- a TTI having a TTI length greater than or equal to this value may be read as a replacement.
- 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 neurology, and may be 12, for example.
- the number of subcarriers included in an RB may be determined based on neumerology.
- the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long.
- One TTI, one subframe, etc. may each consist of one or more resource blocks.
- One or more RBs are physical resource blocks (Physical RB: PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. may be called.
- PRB Physical resource blocks
- SCG sub-carrier groups
- REG resource element groups
- PRB pairs RB pairs, etc.
- a resource block may be composed of one or more resource elements (Resource Element: RE).
- RE resource elements
- 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
- a Bandwidth Part (which may also be called a Bandwidth Part) represents a subset of contiguous common resource blocks (RBs) for a neumerology in a carrier. good.
- the common RB may be identified by an RB index based on the common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within that BWP.
- BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
- One or more BWPs may be configured in one carrier for a UE.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots and symbols are only 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 Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc.
- CP cyclic prefix
- connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled.” Couplings or connections between elements may be physical, logical, or a combination thereof. For example, “connection” may be read as "access”.
- two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.
- the reference signal can also be abbreviated as Reference Signal (RS), and may also be called Pilot depending on the applicable standard.
- RS Reference Signal
- any reference to elements using the "first,” “second,” etc. designations 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, references to first and second elements do not imply that only two elements may be employed therein or that the first element must precede the second element in any way.
- determining and “determining” used in this disclosure may encompass a wide variety of actions.
- “Judgement” and “determination” are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as “judged” or “determined”, and the like.
- "judgment” and “determination” are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgement” or “decision” has been made.
- judgment and “decision” are considered to be “judgment” and “decision” by resolving, selecting, choosing, establishing, comparing, etc. can contain.
- judgment and “decision” can include considering that some action is “judgment” and “decision”.
- judgment (decision) may be read as “assuming”, “expecting”, “considering”, or the like.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean that "A and B are different from C”.
- Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”
- Radio communication system 20 NG-RAN 100 gNB 200UE 1001 Processor 1002 Memory 1003 Storage 1004 Communication Device 1005 Input Device 1006 Output Device 1007 Bus
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Abstract
Description
図1は、本実施形態に係る無線通信システム10の全体概略構成図である。無線通信システム10は、5G New Radio(NR)ないしは6G(Beyond 5Gと呼ばれてもよい)に従った無線通信システムであり、Next Generation-Radio Access Network 20(以下、NG-RAN20、及び端末200(以下、UE200、User Equipment)を含む。
・FR1:410 MHz~7.125 GHz
・FR2:24.25 GHz~52.6 GHz
FR1では、15, 30または60kHzのSub-Carrier Spacing(SCS)が用いられ、5~100MHzの帯域幅(BW)が用いられてもよい。FR2は、FR1よりも高周波数であり、60,または120kHz(240kHzが含まれてもよい)のSCSが用いられ、50~400MHzの帯域幅(BW)が用いられてもよい。
次に、無線通信システム10の機能ブロック構成について説明する。具体的には、gNB100及びUE200の機能ブロック構成について説明する。図2は、gNB100の概略機能ブロック構成図であり、図3は、UE200の概略機能ブロック構成図である。
図2は、無線基地局100の機能ブロック構成図である。図3に示すように、無線基地局100は、無線通信部110、測定報告処理部120、制御信号・参照信号処理部130及び制御部140を備える。
図3は、UE200の機能ブロック構成図である。図4に示すように、UE200は、無線通信部210、制御信号・参照信号処理部220、品質測定部230及び制御部240を備える。
次に、無線通信システム10の動作について説明する。具体的には、基地局100及びUE200の動作について説明する。
5G Evolution或いは6Gなどでは、高周波数帯域における広帯域幅や多ストリームの利用が想定される。ここで、図4は、従来の通信と、B5G(Beyond 5G)/6Gにおける通信の違いを示す図である。
図6は、本実施の形態における、基地局100及びUE200の動作例を示した図である。
(動作例1)例えば、基地局100からUE200端末へ、1 RB未満(例えば1サブキャリア)の超狭帯域のリソース割当を可能としてもよい。
(動作例1-2-1)超狭帯域リソースの設定情報としては、周波数開始位置、周波数リソース量(帯域幅)、時間リソース開始位置(周期・タイミング)、時間リソース量(シンボルまたはスロット数)の少なくともいずれかを含んでもよい。
(動作例1-2-2)端末(UE200)がモニタするリソースは、上述のように、明示的(Explicit)な設定情報のみに基づいて導出されてもよいし、上述の明示的(Explicit)な設定情報と仕様で規定される内容(暗黙的(Implicit)な情報)の組み合わせに基づいて導出されてもよい。
(3.4)動作例2
(動作例2)超狭帯域リソースを設定された端末(UE200)は、基地局100からの特定の通知#1を受けた場合、あるいは特定の条件を満たした場合、モニタリング帯域を超狭帯域リソースのみとし、その帯域で基地局100からの特定の通知#2の有無をモニタする。
(動作例2-1-1)超狭帯域リソース上での特定パターンの既知変調シンボル列(既知系列)の送信有無
(動作例2-1-2)超狭帯域リソース上での差動変調によって送信される所定サイズの情報シンボル列の有無と内容
(動作例2-1-3)超狭帯域リソース上での送信される所定サイズの情報シンボル列の有無と内容
(動作例2-3-1)所定期間データ送受信の指示を受けなかった場合など仕様で規定される条件を満たした場合
(動作例2-3-2)基地局から設定された所定の条件を満たした場合
(動作例2-3-3)DRX状態になる指示を受けた場合,または条件を満たした場合
(動作例2-3-4)DRX状態になった後特定の指示を受けた場合,または特定の条件を満たした場合
(動作例2-3-5)IDLE状態になった場合
(動作例3)特定の通知#2(図6の(3))を検出した端末(UE200)は、モニタリング帯域を超狭帯域より広い帯域に切り替え、別の通知・参照信号の少なくともいずれか一方のモニタリング動作を行う。
(動作例3-1-1)遅延時間には、周波数retuning(再チューニング)の時間、BWP(Bandwidth Part)切替時間の少なくともいずれかが含まれてもよい。
(動作例3-1-2)更にトラッキング・AGC等を行う時間が含まれてもよい。
(動作例3-2-1)PDCCHなどの下りリンク制御チャネル
(動作例3-2-2)SSBなどの下りリンク同期信号・報知チャネル
(動作例3-2-3)CSI-RS,TRSなどの下りリンク参照信号
(動作例4)端末は超狭帯域リソースでのモニタリング動作のサポート可否と関連するパラメータそれぞれのサポート可否の少なくとも一つについての能力(Capability)に関する能力情報として報告を行ってもよい。
(動作例4-1-1)Per UE, Per band, Per FR, Per Duplex mode
(動作例4-2-1)モニタリング周期(間隔)・期間
(動作例4-2-2)モニタリングリソース数(あるいは超狭帯域リソースでの同時モニタリングキャリア数)
(動作例5)超狭帯域リソースのユーザ間多重
異なるユーザがモニタする超狭帯域リソースは、TDM, FDM, CDM, SDMのいずれかあるいは組み合わせでもよいし、複数ユーザで共用してもよい。
(動作例6)
超狭帯域リソース上でのシンボル長
端末200がサポートするSCSのいずれかのシンボル長と同じシンボル長を用いてもよいし、あるいは端末がサポートするSCSのシンボル長とは異なるシンボル長(例えばより長いシンボル長)を用いてもよい。
上述した実施形態によれば、以下の作用効果が得られる。具体的には、端末(UE200)は、特定の条件を満たした場合または特定の通知を受信した場合、通常の最小単位よりも狭い帯域リソースを設定する制御部(制御部240)と、設定された帯域リソースにて、モニタリングを含む受信動作を行う受信部(無線通信部210)と、を備える。
以上、実施形態について説明したが、当該実施形態の記載に限定されるものではなく、種々の変形及び改良が可能であることは、当業者には自明である。
無線フレームは時間領域において1つまたは複数のフレームによって構成されてもよい。時間領域において1つまたは複数の各フレームはサブフレームと呼ばれてもよい。サブフレームはさらに時間領域において1つまたは複数のスロットによって構成されてもよい。サブフレームは、ニューメロロジー(numerology)に依存しない固定の時間長(例えば、1ms)であってもよい。
20 NG-RAN
100 gNB
200 UE
1001 プロセッサ
1002 メモリ
1003 ストレージ
1004 通信装置
1005 入力装置
1006 出力装置
1007 バス
Claims (8)
- 特定の条件を満たした場合または特定の通知を受信した場合、通常の最小単位よりも狭い帯域リソースを設定する制御部と、
設定された帯域リソースにて、モニタリングを含む受信動作を行う受信部と、
を備える端末。 - 前記特定の通知とは、基地局からの前記狭い帯域リソース割当に関する通知である、請求項1に記載の端末。
- 前記通常の最小単位よりも狭い帯域は、1リソースブロック未満、または、一ないし数サブキャリアである、請求項1または2に記載の端末。
- 前記制御部は、他の条件を満たした場合または他の特定の通知を受信した場合に、設定していた前記狭い帯域リソースから広い帯域リソースに切り替えて設定する、請求項1乃至3のいずれか一つに記載の端末。
- 通常の最小単位よりも狭い帯域リソースの設定能力に関する能力情報を基地局に送信する送信部を更に備える請求項1乃至4のいずれか一つに記載の端末。
- 端末に対し、通常の最小単位よりも狭い帯域リソースの割当を行う制御部と、
前記狭い帯域リソース割当に関する通知を前記端末に送信する送信部と、
を備える基地局。 - 特定の条件を満たした場合または特定の通知を受信した場合、通常の最小単位よりも狭い帯域リソースを設定するステップと、
設定された帯域リソースにて、モニタリングを含む受信動作を行うステップと、
を含む、端末における通信方法。 - 端末に対し、通常の最小単位よりも狭い帯域リソースの割当を行うステップと、
前記狭い帯域リソース割当に関する通知を前記端末に送信するステップと、
を含む、基地局における通信方法。
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EP3731582A1 (en) * | 2017-12-22 | 2020-10-28 | Sharp Kabushiki Kaisha | User equipment, base station, and related method |
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US20200137731A1 (en) * | 2017-08-11 | 2020-04-30 | Chao Wei | SWITCH BETWEEN SUB PRB AND NORMAL PRB ALLOCATIONS FOR eMTC |
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