WO2024095679A1 - 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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- WO2024095679A1 WO2024095679A1 PCT/JP2023/036303 JP2023036303W WO2024095679A1 WO 2024095679 A1 WO2024095679 A1 WO 2024095679A1 JP 2023036303 W JP2023036303 W JP 2023036303W WO 2024095679 A1 WO2024095679 A1 WO 2024095679A1
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- downlink shared
- shared channel
- bwp
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- bandwidth
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/04—Error control
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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
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
Definitions
- This disclosure relates to a terminal, a base station, and a communication method in a mobile communication system.
- eRedCap UE For eRedCap UE, it has been proposed to (a) reduce the available frequency bandwidth in FR1 (Frequency Range 1) to a predetermined bandwidth (e.g., 5 MHz), and (b) reduce the frequency bandwidth for the data channel in FR1 to a predetermined bandwidth in order to reduce the peak data rate (see, for example, non-patent documents 1 to 4).
- the data channel refers to a physical channel that transmits data, i.e., the physical downlink shared channel (PDSCH) and/or the physical uplink shared channel (PUSCH).
- the frequency bandwidth is also simply referred to as the "bandwidth".
- the above method (a) reduces the bandwidth (i.e., maximum bandwidth) that can be supported by both the RF (Radio Frequency) section and the BB (Base Band) section of the UE, and makes it possible to reduce the complexity of the RF section and the BB section.
- the above method (b) reduces the bandwidth that can be supported mainly by the BB section of the UE, and makes it possible to reduce the complexity of the BB section.
- the above method (b) makes it possible to reduce the change in technical specifications for the configuration of physical channels other than the PDSCH and/or PUSCH.
- one of the objectives of this disclosure is to provide a terminal, a base station, and a communication method that can perform appropriate communication even when a bandwidth that is reduced compared to RedCap UE is used.
- a terminal includes a communication unit that receives a first downlink shared channel for a random access procedure within a second band narrower than a first band for a specific terminal, and a processing unit that processes transmission of an uplink channel for the first downlink shared channel or reception of a second downlink shared channel when repetition or decoding of the first downlink shared channel spans multiple slots.
- a base station includes a transmitter that transmits a first downlink shared channel for a random access procedure within a second band narrower than a first band for a specific terminal, and a processor that processes reception of an uplink channel for the first downlink shared channel or transmission of a second downlink shared channel when repetition or decoding of the first downlink shared channel spans multiple slots.
- a communication method implemented in a terminal includes receiving a first downlink shared channel for a random access procedure in a second band narrower than a first band for a specific terminal, and, when repetition or decoding of the first downlink shared channel spans multiple slots, processing transmission of an uplink channel for the first downlink shared channel or reception of a second downlink shared channel.
- communication can be performed appropriately even when a reduced bandwidth is used compared to RedCap UE.
- FIG. 1 is a diagram illustrating an example of a schematic configuration of a system according to an embodiment of the present disclosure.
- FIG. 2 is a diagram illustrating an example of a schematic functional configuration of a base station according to an embodiment of the present disclosure.
- FIG. 2 is a diagram illustrating an example of a schematic hardware configuration of a base station according to an embodiment of the present disclosure.
- FIG. 13 is a diagram showing an example of a correspondence relationship between the value of controlResourceSetZero, which is a parameter included in pdcch-ConfigSIB1 included in the MIB, and the parameters for CORESET #0.
- FIG. 2 illustrates an example of a four-step CBRA.
- FIG. 2 is a diagram showing an example of a two-step CBRA.
- FIG. 2 illustrates an example of a four-step CFRA.
- FIG. 1 illustrates an example of a two-step CFRA.
- a diagram showing an example of a MAC RAR. A figure showing an example of a fallback RAR.
- a figure showing an example of a success RAR. A diagram showing an example of a RAR UL grant.
- FIG. 13 is a diagram showing an example of determining a TDRA table.
- FIG. 13 is a diagram showing an example of a TDRA table.
- FIG. 13 is a diagram illustrating an example of determining ⁇ .
- FIG. 11 is a diagram showing an example of a transmission operation of Msg3 in a first case. A figure showing an example of a HARQ feedback transmission operation in the first case.
- FIG. 11 is a diagram showing an example of a transmission operation of Msg3 in a second case. A figure showing an example of HARQ feedback transmission operation in the second case.
- FIG. 11 is a diagram showing an example of a receiving operation of a PDSCH in a second case.
- the system 1 includes a base station 100, a user equipment (UE) 30, a UE 40, and a UE 200.
- UE user equipment
- system 1 is a system that complies with 3GPP TS. More specifically, for example, system 1 is a system that complies with 5G or NR (New Radio) TS. Naturally, system 1 is not limited to this example.
- the base station 100 is a node in a radio access network (RAN) and communicates with UEs located within a coverage area 10 of the base station 100. For example, the base station 100 communicates with UE30, UE40, and UE200.
- RAN radio access network
- the base station 100 communicates with a UE (e.g., UE30, UE40, or UE200) using a protocol stack of the RAN.
- the protocol stack includes RRC, service data adaptation protocol (SDAP), packet data convergence protocol (PDCP), radio link control (RLC), medium access control (MAC), and physical (PHY) layer protocols.
- SDAP service data adaptation protocol
- PDCP packet data convergence protocol
- RLC radio link control
- MAC medium access control
- PHY physical layer protocols
- the protocol stack may include some of these protocols rather than all of them.
- the base station 100 is a gNB.
- the gNB is a node that provides NR user plane and control plane protocol terminations towards the UE and is connected to the 5G Core Network (5GC) via an NG interface.
- the base station 100 may be an en-gNB.
- the en-gNB is a node that provides NR user plane and control plane protocol terminations towards the UE and operates as a secondary node in E-UTRA-NR Dual Connectivity (EN-DC).
- the base station 100 may include a plurality of nodes.
- the plurality of nodes may include a first node that hosts a higher layer included in the protocol stack, and a second node that hosts a lower layer included in the protocol stack.
- the higher layer may include RRC, SDAP, and PDCP
- the lower layer may include RLC, MAC, and a PHY layer.
- the first node may be a CU (central unit), and the second node may be a DU (distributed unit).
- the plurality of nodes may include a third node that performs processing below the PHY layer, and the second node may perform processing above the PHY layer.
- the third node may be a RU (radio unit).
- the base station 100 may be one of the multiple nodes, and may be connected to other units of the multiple nodes.
- the base station 100 may be an integrated access and backhaul (IAB) donor or an IAB node.
- IAB integrated access and backhaul
- Each of the UE 30, UE 40, and UE 200 communicates with a base station.
- each of the UE 30, UE 40, and UE 200 communicates with the base station 100 when the UE 30, UE 40, and UE 200 is located within a coverage area 10 of the base station 100.
- each of UE30, UE40, and UE200 communicates with a base station (e.g., base station 100) using the above protocol stack.
- a base station e.g., base station 100
- UE30 is a normal UE that is not a RedCap UE
- UE40 and UE200 are RedCap UEs.
- a RedCap UE is a UE with reduced capability.
- UE40 is a first type of RedCap UE
- UE200 is a second type of RedCap UE.
- the first type of RedCap UE is a UE with a maximum bandwidth of 20 MHz for FR1 and 100 MHz for FR2.
- FR1 is in the frequency range of 410 MHz to 7125 MHz
- FR2 is in the frequency range of 24250 MHz to 52600 MHz.
- the second type RedCap UE is a UE with a further reduced capability than the first type RedCap UE.
- the peak data rate of the second type RedCap UE is lower than the peak data rate of the first type RedCap UE.
- the peak data rate (e.g., the maximum peak data rate) supported by the second type RedCap UE may be 10 Mbps.
- the second type RedCap UE communicates with a base station using a narrower band than the first type RedCap UE.
- the maximum bandwidth of the second type RedCap UE is smaller than the maximum bandwidth of the first type RedCap UE.
- the maximum bandwidth (e.g., the maximum bandwidth of the downlink and/or uplink) supported by the second type RedCap UE may be up to 5 MHz.
- the maximum bandwidth is, for example, the maximum bandwidth when transmitting and receiving specific information (e.g., user data, etc.).
- the first type RedCap UE is a Rel. 17 RedCap UE
- the second type RedCap UE is a Rel. 18 RedCap UE.
- the second type RedCap UE may be referred to as an eRedCap UE.
- RedCap UE in this disclosure may be interpreted as at least one of the first type RedCap UE and the second type RedCap UE.
- UE200 may perform not only the operations described as UE200 operations, but also the operations described as UE30 operations and/or the operations described as UE40 operations.
- Base station configuration An example of the configuration of the base station 100 according to an embodiment of the present disclosure will be described with reference to FIG. 2 and FIG. 3 .
- the base station 100 includes a wireless communication unit 110, a network communication unit 120, a storage unit 130, and a processing unit 140.
- the wireless communication unit 110 transmits and receives signals wirelessly.
- the wireless communication unit 110 receives signals from a UE and transmits signals to the UE.
- the wireless communication unit 110 may be called a communication unit, a transmission unit, a reception unit, a transmission/reception unit, etc.
- the network communication unit 120 receives signals from the network and transmits signals to the network.
- the memory unit 130 stores various information for the base station 100.
- the processing unit 140 provides various functions of the base station 100.
- the processing unit 140 may include an information acquisition unit 141 and a communication processing unit 143. Note that the processing unit 140 may further include other components in addition to these components. In other words, the processing unit 140 may also perform operations other than those of these components.
- the processing unit 140 communicates with UEs (e.g., UE30, UE40, and UE200) via the wireless communication unit 110.
- the processing unit 140 communicates with core network nodes and other base stations via the network communication unit 120.
- the processing unit 140 acquires information necessary for processing by the communication processing unit 143 based on information received via the wireless communication unit 110 or the network communication unit 120.
- the processing unit 140 may be referred to as a control unit.
- the base station 100 includes an antenna 181, an RF (radio frequency) circuit 183, a network interface 185, a processor 187, a memory 189, and a storage 191.
- RF radio frequency
- Antenna 181 converts signals into radio waves and radiates the radio waves into space. Antenna 181 also receives radio waves in space and converts the radio waves into signals. Antenna 181 may include a transmitting antenna and a receiving antenna, or may be a single antenna for both transmission and reception. Antenna 181 may be a directional antenna and may include multiple antenna elements.
- the RF circuit 183 performs analog processing of signals transmitted and received via the antenna 181.
- the RF circuit 183 may include a high-frequency filter, an amplifier, a modulator, a low-pass filter, etc.
- the RF circuit 183 may amplify, filter, demodulate to a baseband signal, etc., of the received radio frequency signal, and output the signal to the processor 187.
- the RF circuit 183 may modulate to a radio frequency band, filter, amplify, etc., the baseband signal input from the processor 187, and transmit the radio frequency signal via the antenna 181.
- the network interface 185 is, for example, a network adapter, and transmits signals to the network and receives signals from the network.
- the processor 187 performs digital processing of signals transmitted and received via the antenna 181 and the RF circuitry 183.
- the digital processing includes processing of the RAN protocol stack.
- the processor 187 also processes signals transmitted and received via the network interface 185.
- the processor 187 may include multiple processors or may be a single processor.
- the multiple processors may include a baseband processor that performs the digital processing and one or more processors that perform other processing.
- Memory 189 is a computer-readable non-transitory recording medium that stores programs executed by processor 187, parameters related to the programs, and various other information.
- Memory 189 may include at least one of ROM (read only memory), EPROM (erasable programmable read only memory), EEPROM (electrically erasable programmable read only memory (registered trademark)), RAM (random access memory), and flash memory. All or a portion of memory 189 may be included within processor 187.
- Storage 191 is a computer-readable non-transitory recording medium that stores various information.
- Storage 191 may include at least one of an SSD (solid state drive) and an HDD (hard disc drive).
- the wireless communication unit 110 may be implemented by an antenna 181 and an RF circuit 183.
- the network communication unit 120 may be implemented by a network interface 185.
- the memory unit 130 may be implemented by a storage 191.
- the processing unit 140 may be implemented by a processor 187 and a memory 189.
- a part or all of the processing unit 140 may be virtualized. In other words, a part or all of the processing unit 140 may be implemented as a virtual machine. In this case, a part or all of the processing unit 140 may operate as a virtual machine on a physical machine (i.e., hardware) including a processor, memory, etc., and a hypervisor.
- the base station 100 may include a memory (i.e., memory 189) that stores a program, and one or more processors (i.e., processor 187) that can execute the program, and the one or more processors may execute the program to perform the operations of the processing unit 140.
- the program may be a program for causing the processor to execute the operations of the processing unit 140.
- the UE 200 includes a wireless communication unit 210, a storage unit 220, and a processing unit 230.
- the wireless communication unit 210 transmits and receives signals wirelessly.
- the wireless communication unit 210 receives signals from a base station and transmits signals to the base station.
- the wireless communication unit 210 may be called a communication unit, a transmission unit, a reception unit, a transmission/reception unit, etc.
- the memory unit 220 stores various information for the UE 200.
- the processing unit 230 provides various functions of the UE 200.
- the processing unit 230 may include an information acquisition unit 231 and a communication processing unit 233.
- the processing unit 230 may further include other components in addition to these components. That is, the processing unit 230 may also perform operations other than those of these components.
- the processing unit 230 communicates with a base station (e.g., base station 100) via the wireless communication unit 210. Furthermore, the processing unit 230 (information acquisition unit 231) acquires information necessary for processing by the communication processing unit 233 based on information received via the wireless communication unit 210.
- the processing unit 230 may also be referred to as a control unit.
- the UE 200 includes an antenna 281, an RF circuit 283, a processor 285, a memory 287, and a storage 289.
- Antenna 281 converts signals into radio waves and radiates the radio waves into space. Antenna 281 also receives radio waves in space and converts the radio waves into signals. Antenna 281 may include a transmitting antenna and a receiving antenna, or may be a single antenna for both transmission and reception. Antenna 281 may be a directional antenna and may include multiple antenna elements.
- the RF circuit 283 performs analog processing of signals transmitted and received via the antenna 281.
- the RF circuit 283 may include a high-frequency filter, an amplifier, a modulator, a low-pass filter, etc.
- the RF circuit 283 may amplify, filter, demodulate to a baseband signal, etc., of the received radio frequency signal, and output the signal to the processor 285.
- the RF circuit 283 may modulate to a radio frequency band, filter, amplify, etc., the baseband signal input from the processor 285, and transmit the radio frequency signal via the antenna 281.
- the processor 285 performs digital processing of signals transmitted and received via the antenna 281 and the RF circuitry 283.
- the digital processing includes processing of the RAN protocol stack.
- the processor 285 may include multiple processors or may be a single processor.
- the multiple processors may include a baseband processor that performs the digital processing and one or more processors that perform other processing.
- Memory 287 is a computer-readable non-transitory recording medium that stores programs executed by processor 285, parameters related to the programs, and various other information.
- Memory 287 may include at least one of ROM, EPROM, EEPROM, RAM, and flash memory. All or a portion of memory 287 may be included within processor 285.
- Storage 289 is a computer-readable non-transitory recording medium that stores various information.
- Storage 289 may include at least one of an SSD and an HDD.
- the wireless communication unit 210 may be implemented by an antenna 281 and an RF circuit 283.
- the memory unit 220 may be implemented by a storage 289.
- the processing unit 230 may be implemented by a processor 285 and a memory 287.
- the processing unit 230 may be implemented by a SoC (System on Chip) including a processor 285 and a memory 287.
- the SoC may include an RF circuit 283, and the wireless communication unit 210 may also be implemented by the SoC.
- UE 200 may include a memory (i.e., memory 287) that stores a program, and one or more processors (i.e., processor 285) that can execute the program, and the one or more processors may execute the program to perform the operations of processing unit 230.
- the program may be a program for causing a processor to execute the operations of processing unit 230.
- a base station in the following description may refer to base station 100.
- a UE in the following description may be interchangeably read as at least one of UE 30, 40, and 200.
- each base station may be interpreted as one or more functional blocks (e.g., wireless communication unit 110, processing unit 140) or hardware configurations (e.g., RF circuit 183, processor 187) in base station 100.
- each "UE” in the following description may be interpreted as one or more functional blocks (e.g., wireless communication unit 210, processing unit 230) or hardware configurations (e.g., RF circuit 283, processor 285) in UE 200.
- BWP Bandwidth Part
- BWPs are defined to reduce UE power consumption and to effectively utilize broadband carriers.
- DL BWP and UL BWP initial downlink
- dedicated BWPs dedicated DL BWP and dedicated UL BWP
- up to four DL BWPs and up to four UL BWPs are configured in a serving cell.
- BWPs when there is no need to distinguish between DL BWPs and UL BWPs, they are simply referred to as BWPs.
- the "BWP" in this disclosure may be read as DL BWPs and/or UL BWPs.
- the serving cell is also simply referred to as a cell.
- the initial BWP is a BWP used at least for initial access.
- the initial BWP may be used commonly by multiple UEs.
- Each of the initial DL BWP and the initial UL BWP is specified with a BWP identifier (bwp-id) of "0".
- SIB System Information Block 1
- the initial BWP set by the MIB may have a bandwidth according to the Control Resource Set (CORESET) #0 set using parameters included in the MIB.
- the CORESET may correspond to time-frequency resources for searching for Downlink Control Information (DCI).
- CORESET #0 corresponds to a CORESET used by the UE to monitor the PDCCH for scheduling SIB1.
- the initial BWP set by SIB1 is specified based on the initialDownlinkBWP field for the initial DL BWP in SIB1, the initialUplinkBWP field for the initial UL BWP, and the like. More specifically, these fields include BWP information elements including parameters locationAndBandwidth, subcarrierSpacing, and cyclicPrefix.
- the parameter locationAndBandwidth specifies the location in the frequency domain and the bandwidth
- the parameter subcarrierSpacing specifies the subcarrier spacing (SubCarrier Spacing (SCS)) for the BWP
- the parameter cyclicPrefix specifies the cyclic prefix used for each channel and reference signal in the BWP.
- Figure 6 shows an example of the correspondence between the value of controlResourceSetZero, which is a parameter included in pdcch-ConfigSIB1 in the MIB, and the parameters for CORESET#0.
- the correspondence is shown when the maximum channel bandwidth is 5 MHz or 10 MHz and the SCS of the synchronization signal block (SSB) and the PDCCH is 15 kHz.
- the SSB may also be called the SS/PBCH block.
- the value of the parameter controlResourceSetZero is an index value between 0 and 15.
- the UE uses the above correspondence relationship to identify the corresponding CORESET#0 parameters (e.g., the number of resource blocks and the number of symbols) from the index value.
- FIG. 7 shows an example of the correspondence between the value of the parameter searchSpaceZero included in pdcch-ConfigSIB1 in the MIB and the parameters for search space set #0.
- the value of the parameter searchSpaceZero is an index value between 0 and 15. Using the above correspondence relationship, the UE identifies the corresponding search space set #0 (e.g., the number of search space sets per slot and/or the index of the first symbol, etc.) from the index value.
- #0 e.g., the number of search space sets per slot and/or the index of the first symbol, etc.
- a UE that receives an SSB of the cell obtains the bandwidth (24, 48, or 96 resource blocks) of the Type-0 PDCCH CSS set from the setting value of controlResourceSetZero (an integer value between 0 and 15) in pdcch-ConfigSIB1, which is an information element included in the PBCH (MIB) of the SSB.
- the UE may then monitor the Type-0 PDCCH CSS set to obtain SIB1, and obtain locationAndBandwidth, a parameter indicating the frequency location and/or bandwidth of the initial BWP, from SIB1.
- the Type-0 PDCCH CSS set corresponds to search space set #0.
- Msg. 4 may be an RRCSetup message, an RRCResume message, or an RRCReestablishment message.
- the UE transitions, for example, from an RRC idle state to an RRC connected state by such initial access (RA procedure).
- the initial DL BWP may be the same as the band of CORESET (control resource set) #0 for scheduling SIB1.
- base station 100 does not need to include information indicating the initial DL BWP in SIB1, and UE 30 may consider the band of CORESET #0 as the initial DL BWP if there is no such information in SIB1.
- Rel. 17 NR introduced an initial BWP for RedCap UEs.
- the initial BWP for RedCap UEs may be called RedCap-specific initial BWP.
- a normal UE (UE30) that is not a RedCap UE does not use the RedCap-specific initial BWP, but a RedCap UE (e.g., UE40) can use the RedCap-specific initial BWP.
- the RedCap-specific initial BWP may include an initial DL BWP for the RedCap UE and an initial UL BWP for the RedCap UE.
- the initial DL BWP for the RedCap UE may be referred to as a RedCap-specific initial DL BWP
- the initial UL BWP for the RedCap UE may be referred to as a RedCap-specific initial UL BWP.
- Each of the RedCap UE-specific initial DL BWP and the RedCap UE-specific initial UL BWP is specified with a BWP identifier (bwp-id) of "0".
- the information on the RedCap-specific initial BWP may be initialDownlinkBWP-RedCap-r17 and/or initialUplinkBWP-RedCap-r17 included in the ServingCellConfigCommonSIB information element in SIB1. These parameters may include at least one of parameters indicating the location and bandwidth of the RedCap-specific initial BWP, parameters indicating the SCS, and parameters indicating the cyclic prefix, similar to the above-mentioned initialDownlinkBWP, initialUplinkBWP, etc.
- the ServingCellConfigCommonSIB information element may indicate a common setting for the serving cells.
- initialDownlinkBWP-RedCap-r17 and/or initialUplinkBWP-RedCap-r17 may include parameters of the RedCap-specific initial BWP (for example, parameters used in the RedCap-specific initial BWP).
- UE30 which is a normal UE, receives SIB1 and determines the initial BWP based on ServingCellConfigCommonSIB included in SIB1. For example, UE30 identifies the initial DL BWP based on initialDownlinkBWP. Also, UE30 identifies the initial UL BWP based on initialUplinkBWP.
- UE40 receives SIB1 and determines the initial BWP based on the ServingCellConfigCommonSIB included in the SIB1. For example, UE40 identifies the initial DL BWP based on information (initialDownlinkBWP-RedCap-r17) indicating the RedCap-specific initial DL BWP included in the ServingCellConfigCommonSIB. UE40 also identifies the initial UL BWP based on information (initialUplinkBWP-RedCap-r17) indicating the RedCap-specific initial UL BWP included in the ServingCellConfigCommonSIB.
- the RedCap-specific initial DL BWP may be identified based on the information indicating the initial DL BWP. Also, if SIB1 does not include information indicating the RedCap-specific initial UL BWP, the RedCap-specific initial UL BWP may be identified based on the information indicating the initial UL BWP.
- SIB1 when SIB1 includes initialDownlinkBWP-RedCap-r17, UE40 may specify the RedCap-specific initial DL BWP based on initialDownlinkBWP-RedCap-r17 instead of initialDownlinkBWP. Also, when SIB1 includes initialUplinkBWP-RedCap-r17, UE40 may specify the RedCap-specific initial UL BWP based on initialUplinkBWP-RedCap-r17 instead of initialUplinkBWP.
- SIB1 does not include initialDownlinkBWP-RedCap-r17
- UE40 may determine the initial DL BWP (which may be a RedCap-specific initial DL BWP) based on initialDownlinkBWP. If SIB1 does not include initialUplinkBWP-RedCap-r17, UE40 may determine the initial UL BWP (which may be a RedCap-specific initial UL BWP) based on initialUplinkBWP.
- a dedicated BWP is a BWP that is dedicated (UE-specific) to a certain UE.
- a bwp-id other than "0" may be set to the dedicated BWP.
- a dedicated DL BWP and a dedicated UL BWP may be set based on a BWP-Downlink information element and a BWP-Uplink information element included in a ServingCellConfig information element in an RRC message, which is dedicated signaling transmitted from a base station to a UE.
- each of the BWP-Downlink and BWP-Uplink may include various parameters (locationAndBandwidth, subcarrierSpacing, cyclicPrefix) for setting the BWP.
- each of the BWP-Downlink and BWP-Uplink may include parameters of the BWP (for example, parameters used in the BWP).
- dicated BWP may be interchangeably referred to as "RRC configured BWP,” “configured BWP,” “UE-specific BWP,” “dedicated BWP,” or simply "BWP.”
- the base station can notify the UE of the BWP to be used for communication with the base station (i.e., the active BWP) among one or more BWPs configured in the UE. For example, the base station can transmit to the UE a BWP identifier indicating the BWP to be activated when the configuration is performed, i.e., the BWP to be used first for communication with the base station.
- a BWP identifier indicating the BWP to be activated when the configuration is performed, i.e., the BWP to be used first for communication with the base station.
- switching from an active BWP to a BWP that is not an active BWP (inactive BWP) and switching from an inactive BWP to an active BWP can be controlled, for example, by PDCCH (DCI), RRC signaling, MAC control element (MAC CE), or timer switching.
- DCI PDCCH
- RRC signaling MAC control element
- MAC CE MAC
- communication in an active BWP may include at least one of transmission on an uplink shared channel (UL-SCH) in the BWP, transmission on a random access channel (RACH) in the BWP (if a physical random access channel (PRACH) opportunity (PRACH occasion) is configured), monitoring of a physical downlink control channel (PDCCH) in the BWP, transmission on a physical uplink control channel (PUCCH) in the BWP (if a PUCCH resource is configured), reporting of channel state information (CSI) for the BWP, and reception of a downlink shared channel (DL-SCH) in the BWP.
- RACH random access channel
- PUCCH physical downlink control channel
- PUCCH physical uplink control channel
- CSI channel state information
- the UL-SCH is a transport channel and is mapped to a physical uplink shared channel (PUSCH), which is a physical channel.
- PUSCH physical uplink shared channel
- Data transmitted on the UL-SCH is also referred to as UL-SCH data.
- the UL-SCH data may correspond to uplink user data.
- the DL-SCH is a transport channel and is mapped to a physical downlink shared channel (PDSCH: Physical Downlink Shared Channel), which is a physical channel.
- PDSCH Physical Downlink Shared Channel
- Data transmitted on the DL-SCH is also referred to as DL-SCH data.
- the DL-SCH data may correspond to downlink user data.
- the PUCCH is used to transmit uplink control information (UCI).
- the uplink control information includes a hybrid automatic repeat request (HARQ)-ACK, CSI, and/or a scheduling request (SR).
- the HARQ-ACK includes a positive acknowledgment (ACK) or a negative acknowledgment (NACK).
- the PUCCH is used to transmit a HARQ-ACK for a PDSCH (i.e., DL-SCH (DL-SCH data, downlink user data)).
- DL-SCH data and/or the downlink user data are also referred to as a downlink transport block.
- the UE for example, in an active DL BWP, monitors a set of PDCCH candidates in one or more CORESETs. Monitoring the PDCCH may include decoding each of the PDCCH candidates according to a monitored Downlink Control Information (DCI) format.
- DCI Downlink Control Information
- the UE may monitor a DCI format with a CRC (Cyclic Redundancy Check, also referred to as CRC parity bit) scrambled by an RNTI set by the base station.
- the RNTI may include SI-RNTI (System Information-RNTI), RA-RNTI (Random Access RNTI), TC-RNTI (Temporary C-RNTI), P-RNTI (Paging RNTI), and/or C-RNTI (Cell-RNTI).
- the set of PDCCH candidates monitored by the UE may be defined as a PDCCH search space set.
- the search space set may include a common search space set (CSS set(s)) and/or a UE-specific search space set (USS set(s)).
- the base station may configure the CORESET and/or search space set for the UE, and the UE may monitor the PDCCH in the configured CORESET and/or search space set.
- the base station 100 may configure one or more DL BWPs for one UE in one serving cell.
- one of the one or more DL BWPs is used by the UE as the active DL BWP.
- the above RRC message (ServingCellConfig) includes an information element indicating the first active DL BWP, and the UE initially uses the DL BWP indicated by the information element as the active DL BWP.
- the above information element is firstActiveDownlinkBWP-Id.
- the active DL BWP may be switched.
- the base station 100 transmits a DCI including information indicating a DL BWP to the UE, and the UE switches the active DL BWP to the DL BWP indicated by the information.
- the DCI is a DCI (e.g., DCI format 1_1) used for scheduling the PDSCH, and the information is a Bandwidth Part Indicator.
- the UE switches the active DL BWP to the default DL BWP.
- the RRC message includes an information element indicating the default DL BWP, and the UE uses the DL BWP indicated by the information element as the default DL BWP.
- the timer is bwp-InactivityTimer, and the information element is defaultDownlinkBWP-Id.
- the default DL BWP may be a dedicated BWP or an initial BWP (for example, if no information element indicating the default DL BWP is included, the initial DL BWP may be the default DL BWP).
- the base station 100 may configure one or more UL BWPs for one UE in one serving cell.
- one UL BWP of the one or more UL BWPs is used by the UE as the active UL BWP.
- the above RRC message includes an information element indicating a first active UL BWP, and the UE first uses the UL BWP indicated by the information element as the active UL BWP.
- the above information element is firstActiveUplinkBWP-Id.
- the active UL BWP may be switched.
- the base station 100 transmits a DCI including information indicating a UL BWP to the UE, and the UE switches the active UL BWP to the UL BWP indicated by the information.
- the DCI is a DCI (e.g., DCI format 0_1) used for scheduling the PUSCH, and the information is a Bandwidth Part Indicator.
- switching between active DL BWP, active DL BWP, etc. may be further controlled by a MAC (Medium Access Control) entity.
- MAC Medium Access Control
- RedCap UE is introduced as a low-performance UE type suitable for use cases such as industrial sensors, surveillance cameras, and wearables. RedCap UE is also called "reduced capability NR device". RedCap UE is a UE type (terminal type) with reduced equipment cost and complexity compared to general UE types. RedCap UE has mid-range performance and price for IoT, and for example, compared to general UE types, the maximum bandwidth used for wireless communication is set narrower and the number of receivers is smaller. As shown in Figure 8, for FR1, the bandwidth that RedCap UE can support (i.e., the maximum bandwidth supported by RedCap UE) may be 20 MHz.
- the eRedCap UE has a narrower maximum bandwidth used for wireless communication than the RedCap UE.
- the eRedCap UE may correspond to a specified UE type (specified terminal type) in which the frequency bandwidth that can be supported for at least the data channel is reduced compared to the RedCap UE.
- the data channel is a physical channel that transmits data, and may mean, for example, the PDSCH and/or the PUSCH.
- the maximum bandwidth for a physical channel (e.g., PDSCH and/or PUSCH) or for all physical channels available to an eRedCap UE may be referred to as the reduced bandwidth.
- the reduced bandwidth may be interchangeable with the further reduced bandwidth.
- 20 MHz may be interchangeably read as the maximum bandwidth available to a RedCap UE, a specific bandwidth, etc. In this disclosure, 20 MHz may be interchangeably read as any bandwidth value.
- the particular bandwidth may correspond to at least one of the following: The size of the eRedCap-specific initial DL BWP, A value determined based on the location, size, and SCS of the eRedCap-specific initial DL BWP; eRedCap specific initial UL BWP size, A value determined based on the position, size, and SCS of the eRedCap-specific initial UL BWP.
- the specific bandwidth may be 15 RB (equivalent to approximately 3 MHz), 20 RB (equivalent to approximately 4 MHz), 25 RB (equivalent to approximately 5 MHz), etc.
- the specific bandwidth may be 8 RB (equivalent to approximately 3 MHz), 10 RB (equivalent to approximately 4 MHz), 11 and/or 12 RB (equivalent to approximately 5 MHz), etc. That is, a specific size of a specific bandwidth may be used to calculate the size of DCI format 1_0 monitored in the CSS.
- the base station may set the size of the eRedCap-specific initial DL BWP to be equal to a specific value (e.g., 25 RBs equivalent to approximately 5 MHz) or smaller than the specific value (e.g., 25 RBs equivalent to approximately 5 MHz). That is, the specific bandwidth may be equal to 25 RBs or smaller than 25 RBs.
- the reduced bandwidth may be a BWP and may be referred to as the BWP of an eRedCap UE.
- the reduced bandwidth is not limited to a BWP and may correspond to at least one of one or more subcarriers, one or more resource elements, one or more subbands, one or more resource blocks (Resource Blocks (RBs)), one or more physical RBs (Physical RBs (PRBs)), one or more resource block sets, one or more frequency bands, one or more frequency resources, one or more frequency domain resources, etc.
- RBs Resource Blocks
- PRBs Physical RBs
- eRedCap UE For eRedCap UE, it has been proposed to (a) reduce the available frequency bandwidth in FR1 to the reduced bandwidth described above, and (b) reduce the frequency bandwidth for the data channel in FR1 to reduce the peak data rate.
- Other methods of reducing UE costs have also been proposed, such as reducing the peak rate while maintaining the available bandwidth of the BB and RF sections at 20 MHz, and relaxing the UE processing time for the data channel.
- the method (a) reduces the bandwidth (i.e., maximum bandwidth) that can be supported by both the RF section (e.g., RF circuit) and the BB section (e.g., baseband processor) of the UE 200, and can reduce the complexity of the RF section and the BB section.
- the RF section e.g., RF circuit
- the BB section e.g., baseband processor
- the maximum RF bandwidth which is the frequency bandwidth that the RF section of the UE 200 can support
- the maximum BB bandwidth which is the frequency bandwidth that the BB section of the UE 200 can support
- the reduced bandwidth e.g., 5 MHz
- the maximum RF bandwidth may be 20 MHz
- the maximum BB bandwidth may be the reduced bandwidth (e.g., 5 MHz).
- the maximum RF bandwidth and maximum BB bandwidth may be a bandwidth of up to 20 MHz (maximum UE bandwidth).
- the reduced bandwidth may be the bandwidth processed by the BB unit, the bandwidth with which the eRedCap UE processes a data channel, the bandwidth with which the eRedCap UE decodes the PDSCH all at once, or the data processing bandwidth based on the data processing capability of the eRedCap UE.
- performing processing all at once may include performing processing for a predefined length of time.
- performing processing all at once may include performing processing in one slot and/or one symbol.
- the bandwidth processed by the BB unit is also referred to as the BB bandwidth.
- the bandwidth of the PDSCH may be less than or equal to the data processing bandwidth.
- the eRedCap UE may buffer the PDSCH signal and perform data decoding processing from the buffered signal at once.
- the bandwidth of the PDSCH may be larger than the data processing bandwidth.
- the eRedCap UE may buffer a PDSCH signal having a specific bandwidth wider than the reduced bandwidth, and perform data decoding processing from the buffered signal for each reduced bandwidth.
- the specific bandwidth may be the maximum bandwidth available to the RedCap UE, the bandwidth of the BWP for the control channel, or the RF bandwidth.
- the processing time of the data decoding processing will be longer than the processing time of a UE that can perform data decoding processing of the PDSCH of the specific bandwidth at one time.
- the processing time of the data decoding processing by the eRedCap UE may be multiple slots. It may be longer than the processing time of the data decoding processing by the RedCap UE or a normal UE.
- data decoding processing data processing, reception processing, baseband (BB) processing, demodulation processing, and decoding processing may be interpreted as interchangeable.
- BB baseband
- any of the above-mentioned cost reduction methods may be adopted for eRedCap UE, but it is assumed that the above method (b) is mainly adopted.
- the size of the BWP, the size of CORESET#0, and the like are assumed to be expressed in terms of the number of resource blocks (RB), but are not limited to this.
- RB may be interchangeably interpreted as other units related to frequency bandwidth, such as subcarriers, resource elements, subbands, resource block groups, and physical resource blocks (PRBs).
- RA Procedure As RA procedures, four-step (Type 1) and two-step (Type 2) contention based random access (CBRA) and contention free random access (CFRA) are specified.
- CBRA contention based random access
- CFRA contention free random access
- Msg1, RA preamble, PRACH may be read as one another.
- Msg2, RA response (RAR), PDCCH, and PDSCH may be read as one another.
- Msg2 may be an RA response with PDCCH and/or PDSCH.
- Msg3, scheduled transmission, PUSCH may be read as one another.
- Msg4, contention resolution, PDCCH, and PDSCH may be read as one another.
- Msg4 may be contention resolution with PDCCH and/or PDSCH.
- MsgA, RA preamble, and PUSCH payload may be read as one another.
- MsgB, contention resolution, PDCCH, and PDSCH may be read as one another.
- Msg0, RA preamble allocation, and PDCCH order may be read as one another.
- the UE transmits Msg1, the base station transmits Msg2 in response, the UE transmits Msg3 in response, and the base station transmits Msg4 in response.
- the UE transmits MsgA, and the base station transmits MsgB in response.
- the base station transmits Msg0, the UE transmits Msg1 in response, and the base station transmits Msg2 in response.
- the base station transmits Msg0, the UE transmits MsgA in response, and the base station transmits MsgB in response.
- the RA is transmitted using the PDCCH and PDSCH as Msg 2 in the 4-step RA.
- the PDSCH is scheduled using DCI format 1_0, which is scrambled by the RA-RNTI.
- the PDSCH includes a MAC RAR as the MAC payload.
- the MAC payload of the MAC RAR includes an UL grant (RAR UL grant) that schedules a PUSCH for the UL-SCH, which is transmitted as Msg 3.
- the RAR is transmitted using the PDCCH and PDSCH as MsgB in the two-step RA.
- the PDSCH is scheduled using DCI format 1_0, which is scrambled by the MsgB-RNTI.
- the PDSCH includes a fallback RAR or a success RAR as the MAC payload.
- the fallback RAR includes an UL grant (RAR UL grant) that schedules a PUSCH for the UL-SCH transmitted as Msg3, similar to the MAC RAR.
- the success RAR includes a timing indicator for HARQ feedback for MsgB (PDSCH).
- the RAR UL grant includes a PUSCH time resource allocation field.
- the PUSCH time resource allocation field indicates the timing from the reception of Msg2 (PDSCH) to the transmission of Msg3 (PUSCH).
- the UE when the UE receives a PDSCH (Msg2/MsgB), it transmits a PUSCH (Msg3) or HARQ-ACK information for that PDSCH.
- Msg2/MsgB a PDSCH
- Msg3 a PUSCH
- HARQ-ACK information for that PDSCH.
- the timing of PUSCH transmission for PDSCH is indicated by the PUSCH time resource allocation in the RAR UL grant. If the PUSCH time domain allocation list (pusch-TimeDomainAllocationList/PUSCH-TimeDomainResourceAllocationList) is not set in the PUSCH common configuration (pusch-ConfigCommon) in SIB1, multiple relationships in the TDRA table (default table/default A) specified by the specification are used, as shown in FIG. 18.
- the pusch-TimeDomainAllocationList is set in the PUSCH common configuration (pusch-ConfigCommon) in SIB1
- multiple (e.g., 16) time relationships between the RAR UL grant and the corresponding PUSCH are set by the parameters (k2, start symbol and length (startSymbolAndLength/SLIV/S and L)) included in the pusch-TimeDomainAllocationList, as shown in FIG. 19.
- the timing of PUSCH transmission is determined by indicating one of the multiple relationships by the value set in the 4-bit PUSCH time resource allocation included in the RAR UL grant.
- the PUSCH time resource allocation in the RAR UL grant may be referred to as a row index of a time domain resource allocation (TDRA) table.
- TDRA time domain resource allocation
- the timing of the HARQ feedback transmission for the PDSCH is indicated by the HARQ feedback timing indicator in the success RAR.
- Multiple (e.g., eight) time relationships between the PDSCH with MsgB and its corresponding HARQ feedback transmission are specified in the specification.
- the timing of the HARQ feedback transmission is determined by indicating one of the multiple relationships by the value set in the 3-bit HARQ feedback timing indicator in the success RAR.
- a UE receives a PDSCH ending in slot n with a corresponding RAR message for a PRACH transmission from the UE, the UE transmits PUSCH in slot n+ k2 + ⁇ + 2 ⁇ ⁇ Kcell,offset , where k2 is given a value corresponding to the value of the PUSCH time resource allocation field in the RAR UL grant using the time domain resource allocation A (table) defined in the specification, and ⁇ is the subcarrier spacing (SCS) setting ( ⁇ PUSCH ) configured for the UL BWP. As shown in Figure 20, ⁇ is given a value corresponding to ⁇ using the association (table) defined in the specification.
- Kcell,offset is the value given by CellSpecific_Koffset if given, and 0 otherwise.
- the slot for PUCCH transmission is indicated by the HARQ Feedback Timing Indicator field in the success RAR with value k.
- the slot is defined as n+k+ ⁇ + 2 ⁇ ⁇ Kcell ,offset .
- Msg1-based early indication by RedCap UE is specified.
- the base station can configure RA resources corresponding to RedCap UE (e.g., RedCap function) using information (featurePriorities/FeaturePriority) indicating feature priority in SIB1.
- the RA resources may be, for example, RA preambles.
- configuring RA resources corresponding to RedCap function may be read as configuring Msg. 1-based early indication.
- the UE identifies, from the set of RA resources applicable to the RA procedure, an RA resource that is configured with the feature that has the highest assigned priority within the feature priorities of all features applicable to the RA procedure.
- the UE can indicate that it is a RedCap UE (that it supports the RedCap function) by performing an RA procedure using RA resources that correspond to the RedCap function. In other words, the UE can indicate that it is a RedCap UE. This operation is called Msg1-based early indication.
- eRedCap UE will also perform Msg1-based early indication according to a mechanism similar to that of RedCap UE. Therefore, it is assumed that RA resources specific to eRedCap will be configured, and RA resources common to RedCap and eRedCap will be configured.
- the control method/processing method for receiving the downlink shared channel in an eRedCap UE is unclear. For example, repeated transmission (repetition) of downlink shared channels such as SIB1, paging, and RAR transmitted by PDSCH is being considered.
- the processing time for data decoding in an eRedCap UE may be longer than the processing time for data decoding in other UEs.
- the control method/processing method for receiving the downlink shared channel is unclear.
- the control method/processing method for transmitting the uplink channel corresponding to such a downlink shared channel is unclear. If such control methods/processing methods are not thoroughly considered, there is a risk of system performance deteriorating.
- eRedCap UE Operation of eRedCap UE with respect to Downlink Shared Channel
- eRedCap UE Operation of eRedCap UE with respect to Downlink Shared Channel
- the eRedCap UE may be simply referred to as a UE or a terminal.
- a terminal may include a communication unit (e.g., wireless communication unit 210) that receives a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processing unit (e.g., processing unit 230) that processes transmission of an uplink channel for the first downlink shared channel or reception of a second downlink shared channel when repetition or decoding of the first downlink shared channel spans multiple slots.
- a communication unit e.g., wireless communication unit 210) that receives a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal
- a processing unit e.g., processing unit 230
- the terminal may include a communication unit that receives a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processing unit that processes transmission of an uplink channel for the first downlink shared channel when repetition of the first downlink shared channel spans multiple slots.
- the terminal may include a communication unit that receives a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processing unit that processes transmission of an uplink channel for the first downlink shared channel when decoding of the first downlink shared channel spans multiple slots.
- the terminal may include a communication unit that receives a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processing unit that processes reception of a second downlink shared channel when decoding of the first downlink shared channel spans multiple slots.
- the terminal may implement a communication method of the following operation example.
- the specific terminal normal UE, RedCap UE, and eRedCap UE may be read as interchangeable.
- the first band, the band or DL BWP for receiving the PDSCH of the specific terminal, the band or DL BWP for receiving the downlink control channel of the eRedCap UE, and the band or DL BWP having a specific bandwidth may be read as interchangeable.
- the second band, the band or DL BWP for receiving the downlink shared channel of the eRedCap UE, the band or DL BWP for receiving the downlink control channel of the eRedCap UE, the band or DL BWP having a specific bandwidth, the specific frequency band, and the reduced bandwidth may be read as interchangeable.
- the first downlink shared channel may be accompanied by an RAR, may be accompanied by an SIB1, or may be accompanied by paging.
- the uplink channel may be a PUSCH with Msg3 or a HARQ feedback for the RAR.
- the HARQ feedback for the RAR may be transmitted on a PUCCH.
- the process of transmitting the uplink channel may include determining the transmission timing of the uplink channel.
- the second downlink shared channel may be another downlink shared channel in the band (e.g., BWP) and slot of the first downlink shared channel.
- the process of receiving the second downlink shared channel may include any of the following: not receiving the second downlink shared channel, not being required to receive the second downlink shared channel, assuming not to receive the second downlink shared channel, or dropping the second downlink shared channel.
- a base station may include a transmitter (e.g., wireless communication unit 110) that transmits a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processing unit (e.g., processing unit 140) that processes reception of an uplink channel for the first downlink shared channel or transmission of a second downlink shared channel when the repetition or decoding of the first downlink shared channel spans multiple slots.
- a transmitter e.g., wireless communication unit 110
- processing unit 140 e.g., processing unit 140
- the base station may include a transmitter that transmits a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processing unit that processes reception of an uplink channel for the first downlink shared channel when the repetition of the first downlink shared channel spans multiple slots.
- the base station may include a transmitter that transmits a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processing unit that processes reception of an uplink channel for the first downlink shared channel when the decoding of the first downlink shared channel spans multiple slots.
- the base station may include a transmitter that transmits a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal, and a processor that processes the transmission of a second downlink shared channel when decoding of the first downlink shared channel spans multiple slots.
- the first case the case where the data decoding processing capability of the eRedCap UE is not taken into consideration, the case where the PDSCH bandwidth is equal to or less than the data decoding processing bandwidth of the eRedCap UE, the case where the data decoding processing time of the eRedCap UE is equal to the data decoding processing time of the RedCap UE or normal UE, the case where the PDSCH bandwidth is smaller than the BWP for the downlink control channel, and the case where the repetition of the first downlink shared channel spans multiple slots may be interpreted as being interchangeable.
- the second case the case in which the data decoding processing capability of the eRedCap UE is taken into consideration, the case in which the PDSCH bandwidth is larger than the data decoding processing bandwidth of the eRedCap UE, the case in which the data decoding processing time of the eRedCap UE is longer than the data decoding processing time of the RedCap UE or normal UE, the case in which the PDSCH bandwidth is equal to the BWP for the downlink control channel, and the case in which the decoding of the first downlink shared channel spans multiple slots may be interpreted as interchangeable.
- the UE may decide to receive or assume PDSCH repetition in the RA procedure.
- the PDSCH may be accompanied by an RAR, and may be at least one of Msg2 and MsgB.
- the RAR may be at least one of a MAC RAR, a fallback RAR, and a success RAR.
- the PDSCH repetition may span multiple slots.
- the number of repetitions of the PDSCH may be set or indicated by the base station.
- the number of repetitions of the PDSCH may be set or indicated by using at least one of a cell-specific parameter included in SIB1 (system information) and a DCI.
- the number of repetitions of a plurality of PDSCHs may be set using a cell-specific parameter, and one of the numbers of repetitions of the plurality of PDSCHs may be indicated using a DCI.
- the DCI may be a DCI format (e.g., DCI format 1_0) with a CRC scrambled by any of the RA-RNTI, MsgB-RNTI, and SI-RNTI. As in the example of FIG.
- the number of repetitions of the PDSCH N Rep may be set by a cell-specific parameter, and one value of I Rep may be indicated by a field in the DCI, thereby determining one value of the number of repetitions of the PDSCH N Rep .
- a TDRA table including the number of PDSCH repetitions may be defined or configured, and a value set in a field in the DCI (e.g., a PUSCH time resource allocation (assignment) field) may indicate a value in the TDRA table to determine the number of PDSCH repetitions.
- the UE may determine control over the PDSCH based on at least one of the following: the Msg1-based early indication is set and the Msg1-based early indication is executed. As in the example of FIG. 22, the UE may recognize the repetition of the PDSCH based on at least one of the following: the Msg1-based early indication is set and the Msg1-based early indication is executed. For example, it may be determined whether the size (number of bits) of the frequency domain resource allocation field in the DCI is based on the size of the DL BWP or based on the specific frequency band that is set.
- the DL BWP may be CORESET #0 or the initial DL BWP.
- the specific frequency band may have a bandwidth of 5 MHz or less.
- the UE may receive information indicating the specific frequency band.
- the UE may receive at least one of the following: system information, an RRC message, and a DCI, including information indicating the specific frequency band. That is, the base station may transmit at least one of the following: system information, an RRC message, and a DCI, including information indicating the specific frequency band.
- the system information may be SIB1.
- the DCI may be a DCI format (e.g., DCI format 1_0) with a CRC scrambled by either the RA-RNTI, the MsgB-RNTI, or the SI-RNTI.
- the number of PDSCH repetitions may be specified in the specification, may be set by the system information, or may be indicated by the DCI.
- the UE may determine the transmission timing of Msg3 based on the timing of a specific repetition among multiple repetitions of the PDSCH.
- the specific repetition may be rephrased as a specific PDSCH among multiple repetitions of the PDSCH.
- the multiple repetitions may be set by the number of repetitions or may be indicated by the base station.
- the specific repetition may be the last repetition among the multiple repetitions set or indicated by the number of repetitions, or may be the repetition last received by the UE.
- the timing of the specific repetition may be a reference timing for determining the transmission timing of Msg3.
- the timing of the specific repetition may be the end timing of the multiple repetitions, the end slot of the multiple repetitions, or the slot of the repetition last received by the UE.
- the multiple repetitions or the PDSCH as the specific repetition may be a PDSCH with Msg2 (MAC RAR or fallback RAR).
- the UE may determine the transmission timing of Msg3 based on the last recurring slot with the RAR message, the PUSCH time resource allocation (assignment) field in the RAR message, and the TDRA table.
- Frequency hopping may be applied to the PUSCH with Msg3.
- the UE may apply frequency hopping to the PUSCH with Msg3 at the determined transmission timing.
- the base station may transmit at least one of system information, an RRC message, and a DCI including information for indicating whether or not frequency hopping is applied to the PUSCH with Msg3 (whether frequency hopping is enabled or disabled).
- the UE may determine whether or not frequency hopping is applied to the PUSCH with Msg3 based on the information indicating whether or not frequency hopping is applied, which is included in at least one of the system information, the RRC message, and the DCI.
- the base station may also transmit at least one of system information, an RRC message, and a DCI including information indicating a specific frequency band to which frequency hopping is applied.
- the UE may determine information indicating a specific frequency band to which frequency hopping is applied, based on information indicating the specific frequency band, which is included in at least one of the system information, the RRC message, and the DCI.
- the specific frequency band may have a bandwidth of 5 MHz or less.
- the system information may be SIB1.
- the DCI may be a DCI format (e.g., DCI format 1_0) with a CRC that is scrambled by either the RA-RNTI, the MsgB-RNTI, or the SI-RNTI.
- the UE may determine the transmission timing of the PUCCH with HARQ feedback for the PDSCH based on the last repetition slot of the PDSCH with a success RAR message (MsgB). For example, the UE may determine the transmission timing of the PUCCH with HARQ feedback for the PDSCH based on the last repetition slot of the PDSCH with a success RAR message and the HARQ feedback transmission timing indicator in the success RAR message.
- Candidates for the value (number of slots) of the HARQ feedback transmission timing indicator may include candidates for the value k that are predefined by specifications, etc.
- An offset for the value (number of slots) of the HARQ feedback transmission timing indicator may be set. The offset may be an eRedCap-specific parameter.
- the base station may transmit at least one of system information, an RRC message, and a DCI including information for indicating the offset.
- the UE may determine the value of the offset based on information for indicating the offset included in at least one of the system information, the RRC message, and the DCI.
- the system information may be SIB1.
- the DCI may be a DCI format (e.g., DCI format 1_0) with a CRC scrambled by any one of the RA-RNTI, the MsgB-RNTI, and the SI-RNTI.
- the eRedCap UE can properly transmit the uplink channel for the downlink shared channel even if the downlink shared channel involves repetition.
- the UE may transmit capability information regarding downlink processing (e.g., data decoding processing capability) supported by the UE.
- the capability information may be the amount of downlink information that can be processed per slot, or the amount of DL-SCH or PDSCH data that can be processed per slot. It may be the processing time of one downlink transport block or DL-SCH or PDSCH.
- the data decoding process of the PDSCH may span multiple slots.
- the processing capability indicated by the capability information may indicate the buffering capability for processing.
- the buffering capability for the processing may be lower than the buffering capability for reception.
- the UE may determine the transmission timing of Msg3 based on the reception timing of the PDSCH and the parameters for determining the transmission timing of Msg3.
- the PDSCH may be a PDSCH with a MAC RAR or a PDSCH with a fallback RAR.
- the parameters for determining the transmission timing of Msg3 may be specified in advance by a specification or the like, or may be set or instructed by the base station.
- the base station may transmit at least one of system information, an RRC message, and a DCI including the parameters for determining the transmission timing of Msg3.
- the UE may receive the parameters for determining the transmission timing of Msg3 included in at least one of the RRC message and the DCI.
- the system information may be SIB1.
- the DCI may be a DCI format (e.g., DCI format 1_0) with a CRC that is scrambled by any of the RA-RNTI, MsgB-RNTI, and SI-RNTI.
- the parameter may be an eRedCap specific parameter or a parameter corresponding to capability information.
- the parameter may be specified by a TDRA table for Msg3 (e.g., Msg3 PUSCH).
- the parameter may be an offset to a time resource specified in a TDRA table for PUSCH.
- the time resource may be a time resource for a normal UE or a RedCap UE.
- the offset may be an offset related to the processing time of the PDSCH, an offset corresponding to capability information related to the processing time of the PDSCH, or the number of slots.
- frequency hopping may be applied to the PUSCH with Msg3.
- the UE may apply frequency hopping to the PUSCH with Msg3 at the determined transmission timing.
- the UE may receive information indicating a specific frequency band to which frequency hopping is applied.
- the specific frequency band may have a bandwidth of 5 MHz or less.
- the UE may receive at least one of system information, an RRC message, and a DCI, including information indicating the specific frequency band.
- the system information may be SIB1.
- the DCI may be a DCI format (e.g., DCI format 1_0) with a CRC scrambled by any of the RA-RNTI, MsgB-RNTI, and SI-RNTI.
- the UE may determine the transmission timing of the HARQ feedback based on the reception timing of the PDSCH and the parameters for determining the transmission timing of the HARQ feedback.
- the PDSCH may be a PDSCH with a success RAR.
- the parameters for determining the transmission timing of the HARQ feedback may be predefined by a specification or the like, or may be set or instructed by the base station.
- the base station may transmit at least one of system information, an RRC message, and a DCI including the parameters for determining the transmission timing of the HARQ feedback.
- the UE may receive the parameters for determining the transmission timing of the HARQ feedback included in at least one of the RRC message and the DCI.
- the system information may be SIB1.
- the DCI may be a DCI format (e.g., DCI format 1_0) with a CRC scrambled by any of the RA-RNTI, the MsgB-RNTI, and the SI-RNTI.
- the parameter may be an eRedCap specific parameter.
- the parameter may be an offset to a time resource indicated for HARQ feedback.
- the time resource may be a time resource for a normal UE or a RedCap UE.
- the offset may be an offset related to the processing time of the PDSCH, an offset corresponding to capability information related to the processing time of the PDSCH, or a number of slots.
- the UE may not decode other PDSCHs at the timing of the specific downlink message.
- the specific downlink message may be a PDSCH with an RAR message, a SIB1, or paging.
- the UE may not be required to simultaneously receive two or more PDSCHs including a PDSCH with an RAR message.
- the UE may not decode other PDSCHs in a slot in which the PDSCH with an RAR message is received.
- the PDSCH with an RAR message may be scheduled using a DCI format with a CRC scrambled by the RA-RNTI or MsgB-RNTI (e.g., DCI format 1_0).
- the other PDSCHs may be DCI formats with a CRC scrambled by the C-RNTI or CS-RNTI (e.g., DCI format 1_0 and/or DCI format 1_1 and/or DCI format 1_2).
- the UE may not decode other PDSCHs in the same frequency band as the frequency band of the PDSCH with the RAR message. That is, the UE may not decode other PDSCHs when they are scheduled in the same frequency band as the frequency band in which the PDSCH with the RAR message is scheduled. The UE may not decode other PDSCHs in the slot and frequency band of the PDSCH with the RAR message.
- the UE may not decode other PDSCHs when they are scheduled in the same slot and frequency band (i.e., time domain resource and time domain resource) as the slot and frequency band in which the PDSCH with the RAR message is scheduled.
- the UE may drop other PDSCHs in the slot and frequency band in which the PDSCH with the RAR message is received, may consider other PDSCHs not to be transmitted, or may assume that other PDSCHs are not transmitted.
- the eRedCap UE can properly transmit the uplink channel for the downlink shared channel even if the downlink shared channel involves repetition.
- the eRedCap UE can appropriately process the transmission of the uplink channel to the first downlink shared channel or the reception of the second downlink shared channel.
- the frequency range in which the eRedCap UE in the present disclosure operates is not limited to FR1.
- the above-described method in the present disclosure may be applied to control regarding BWP in FR2 (FR2-1, FR2-2), FR3, FR4, etc.
- a parameter indicating the location of the BWP and/or a parameter indicating the bandwidth of the BWP may be used.
- the ServingCellConfigCommonSIB information element in SIB1 may be interpreted as the ServingCellConfigCommon information element included in another RRC message (e.g., information for reconfiguration with synchronization (ReconfigurationWithSync field) or information for a secondary cell (SCellConfig field) in a CellGroupConfig information element indicating the configuration of a cell group).
- RRC message e.g., information for reconfiguration with synchronization (ReconfigurationWithSync field) or information for a secondary cell (SCellConfig field) in a CellGroupConfig information element indicating the configuration of a cell group.
- BWP may be interchangeably interpreted as at least one of a subcarrier, resource element, subband, resource block (RB), physical RB (PRB), common RB (CRB), virtual RB (VRB), resource block set, frequency band, bandwidth, frequency bandwidth, frequency resource, frequency domain resource, partial band, etc.
- RB resource block
- PRB physical RB
- CRB common RB
- VRB virtual RB
- search space one or more search spaces may be referred to as a search space set.
- search space “search space,” “search space set,” “search space setting,” “search space set setting,” “CORESET,” “CORESET setting,” etc. may be read as interchangeable.
- channels and signals may be interpreted interchangeably.
- Radio Resource Control RRC
- RRC parameters RRC parameters
- RRC messages higher layer parameters
- fields IEs
- IEs information elements
- the RedCap-specific BWP (including the RedCap-specific initial BWP) may correspond to a BWP having a bandwidth up to the maximum bandwidth (e.g., 20 MHz) available to the RedCap UE.
- the eRedCap-specific (initial) BWP for the control channel may correspond to a BWP having a bandwidth up to the maximum bandwidth (e.g., 20 MHz) available to the eRedCap UE.
- the eRedCap-specific BWP (including the eRedCap-specific initial BWP, the eRedCap-specific (initial) BWP for the data channel, etc.) may correspond to a BWP having a bandwidth up to a reduced bandwidth (e.g., 5 MHz).
- the UE may perform any of the above operation examples based on at least one of the following: it is an eRedCap UE, and it has reported capability information regarding the eRedCap UE or data decoding processing capabilities.
- the UE may perform any of the above operation examples based on at least one of the following: that the Msg1-based early indication has been set and that the Msg1-based early indication has been executed.
- the information, parameters, etc. described in this disclosure may be represented using absolute values, may be represented using relative values from a predetermined value, or may be represented using other corresponding information.
- a radio resource may be indicated by a predetermined index.
- 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.
- Input/output information, signals, etc. may be stored in a specific location (e.g., memory) or may be managed using a management table. Input/output information, signals, etc. may be overwritten, updated, or added to. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to another device.
- a specific location e.g., memory
- Input/output information, signals, etc. may be overwritten, updated, or added to.
- Output information, signals, etc. may be deleted.
- Input information, signals, etc. may be transmitted to another device.
- the notification of information is not limited to the aspects/embodiments described in this disclosure, and may be performed using other methods.
- the notification of information in this disclosure 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, broadcast information (Master Information Block (MIB), System Information Block (SIB)), etc.), Medium Access Control (MAC) signaling), other signals, or a combination of these.
- DCI Downlink Control Information
- UCI Uplink Control Information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), etc.
- the RRC signaling may be called an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- the MAC signaling may be notified, for example, using a MAC Control Element (CE).
- CE MAC Control Element
- notification of specified information is not limited to explicit notification, but may be implicit (e.g., by not notifying the specified information or by notifying other information).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
- a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave, etc.), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave, etc.
- BS base station
- eNB eNodeB
- gNB gNodeB
- access point "Transmission Point (TP)
- Reception Point RP
- Transmission/Reception Point TRP
- panel "cell", “sector”, “cell group”, “carrier”, “component carrier”, etc.
- MS Mobile Station
- UE User Equipment
- At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, etc.
- at least one of the base station and the mobile station may be a device mounted on a moving object, the moving object itself, etc.
- the moving object 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).
- a vehicle e.g., a car, an airplane, etc.
- an unmanned moving object e.g., a drone, an autonomous vehicle, etc.
- a robot manned or unmanned.
- at least one of the base station and the mobile station may be a device that does not necessarily move during communication operations.
- each aspect/embodiment described in this disclosure may be used alone, in combination, or switched between depending on the implementation.
- the processing procedures, sequences, flow charts, etc. of each aspect/embodiment described in this disclosure may be rearranged as long as there is no inconsistency.
- the methods described in this disclosure present elements of various steps using an exemplary order, and are not limited to the particular order presented.
- 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 elements using designations 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 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/B and “at least one of A and B” may be interpreted as interchangeable. Also, in this disclosure, “A/B/C” may mean “at least one of A, B, and C.”
- 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.”
- [Appendix 1] a communication unit that receives a first downlink shared channel for a random access procedure in a second band that is narrower than the first band for a specific terminal; a processing unit that processes transmission of an uplink channel for the first downlink shared channel or reception of a second downlink shared channel when repetition or decoding of the first downlink shared channel spans a plurality of slots.
- Appendix 2 The terminal according to claim 1, wherein the communication unit receives system information or downlink control information regarding the number of repetitions.
- Appendix 9 a transmitter that transmits a first downlink shared channel for a random access procedure in a second band that is narrower than the first band for a specific terminal; a processing unit that processes reception of an uplink channel for the first downlink shared channel or transmission of a second downlink shared channel when repetition or decoding of the first downlink shared channel spans a plurality of slots.
- a communication method implemented in a terminal comprising: receiving a first downlink shared channel for a random access procedure in a second band narrower than the first band for a specific terminal; and processing transmission of an uplink channel for the first downlink shared channel or reception of a second downlink shared channel when repetition or decoding of the first downlink shared channel spans multiple slots.
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Abstract
Description
1.システムの構成
2.基地局の構成
3.ユーザ機器の構成
4.動作例
図1を参照して、本開示の実施形態に係るシステム1の構成の例を説明する。図1を参照すると、システム1は、基地局100、ユーザ機器(User Equipment:UE)30、UE40及びUE200を含む。
基地局100は、無線アクセスネットワーク(radio access network:RAN)のノードであり、基地局100のカバレッジエリア10内に位置するUEと通信する。例えば、基地局100は、UE30、UE40及びUE200と通信する。
UE30、UE40及びUE200の各々は、基地局と通信する。例えば、UE30、UE40及びUE200の各々は、基地局100のカバレッジエリア10内に位置する場合に、基地局100と通信する。
図2及び図3を参照して、本開示の実施形態に係る基地局100の構成の例を説明する。
まず、図2を参照して、本開示の実施形態に係る基地局100の機能構成の例を説明する。基地局100は、無線通信部110、ネットワーク通信部120、記憶部130及び処理部140を備える。
次に、図3を参照して、本開示の実施形態に係る基地局100のハードウェア構成の例を説明する。基地局100は、アンテナ181、RF(radio frequency)回路183、ネットワークインターフェース185、プロセッサ187、メモリ189及びストレージ191を備える。
図4及び図5を参照して、本開示の実施形態に係るUE200の構成の例を説明する。
まず、図4を参照して、本開示の実施形態に係るUE200の機能構成の例を説明する。UE200は、無線通信部210、記憶部220及び処理部230を備える。
次に、図5を参照して、本開示の実施形態に係るUE200のハードウェア構成の例を説明する。UE200は、アンテナ281、RF回路283、プロセッサ285、メモリ287及びストレージ289を備える。
以下、本開示の実施形態に係る基地局100及びUE200の動作の例を説明する。以下で説明する基地局100及びUE200の通信方法(無線通信方法)は、上述のシステム1において適用されてもよい。
まず、Rel.15、16、17 NRにおけるBWPの概要について説明する。
初期BWP(initial BWP)は、少なくとも初期アクセスに用いられるBWPである。初期BWPは、複数のUEに共通で用いられてもよい。初期DL BWP及び初期UL BWPのそれぞれは、BWP識別子(bwp-id)が“0”として規定される。
専用BWPは、あるUEに専用(UE固有)に設定されるBWPである。専用BWPには、“0”以外のbwp-idが設定されてもよい。例えば、基地局からUEに送信される専用シグナリングであるRRCメッセージ中のServingCellConfig情報要素に含まれるBWP-Downlink情報要素及びBWP-Uplink情報要素に基づいて、専用DL BWP及び専用UL BWPがそれぞれ設定されてもよい。例えば、BWP-Downlink及びBWP-Uplinkのそれぞれに、当該BWPを設定する各種パラメータ(locationAndBandwidth、subcarrierSpacing、cyclicPrefix)が含まれてもよい。例えば、BWP-Downlink及びBWP-Uplinkのそれぞれに、当該BWPのパラメータ(例えば、当該BWPにおいて用いられるパラメータ)が含まれてもよい。
次に、図8及び図9を参照して、RedCap UE(UE40)及びeRedCap UE(UE200)の違いについて説明する。
・eRedCap固有初期DL BWPのサイズ、
・eRedCap固有初期DL BWPの位置、サイズ、及びSCSに基づいて決定される値、
・eRedCap固有初期UL BWPのサイズ、
・eRedCap固有初期UL BWPの位置、サイズ、及びSCSに基づいて決定される値。
RAプロシージャとして、4ステップ(タイプ1)及び2ステップ(タイプ2)のcontention based random access(CBRA)及びcontention free random access(CFRA)が規定されている。
RedCap UEによるMsg1ベース早期指示が規定されている。基地局は、SIB1内の機能優先度(feature priority)を示す情報(featurePriorities/FeaturePriority)を用いて、RedCap UE(例えば、RedCap機能)に対応するRAリソースを設定することができる。RAリソースは、例えば、RAプリアンブルであってもよい。本開示において、RedCap機能に対応するRAリソースを設定することは、Msg.1ベース早期指示を設定すること、と読み替えられてもよい。
本開示の一実施形態に係る下りリンク共有チャネルに関するeRedCap UEの動作について、以下で説明する。以下の動作例において、eRedCap UEは、単にUE又は端末と呼ばれてもよい。
UEは、設定又は指示に基づいて、RAプロシージャにおけるPDSCHの繰り返しの受信を決定してもよいし、PDSCHの繰り返しを想定してもよい。そのPDSCHは、RARを伴ってもよいし、Msg2及びMsgBの少なくとも1つであってもよい。RARは、MAC RAR、フォールバックRAR、サクセスRARの少なくとも1つであってもよい。PDSCHの繰り返しは、複数スロットに跨ってもよい。
UEは、そのUEによってサポートされる下りリンクの処理(例えば、データ復号処理能力)に関する能力情報を送信してもよい。例えば、能力情報は、1スロットあたりに処理可能な下りリンクの情報量であってもよいし、1スロットあたりに処理可能なDL-SCH又はPDSCHのデータ量であってもよい。1つの下りリンクのトランスポートブロック又はDL-SCH又はPDSCHの処理時間であってもよい。PDSCHのデータ復号処理は、複数スロットに跨ってもよい。能力情報が示す処理能力は、処理のためのバッファリングの能力を示してもよい。その処理のためのバッファリングの能力は、受信のためのバッファリングの能力よりも低くてもよい。
本開示におけるeRedCap UEが動作する周波数レンジは、FR1に限られない。例えば、FR2(FR2-1、2-2)、FR3、FR4などにおけるBWPに関する制御に、本開示における上述の方法を適用してもよい。
なお、本開示において説明した用語及び本開示の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。
本開示の一実施形態に関して、以下の発明を付記する。
[付記1]
特定端末のための第1帯域より狭い第2帯域内において、ランダムアクセスプロシージャのための第1下りリンク共有チャネルを受信する通信部と、
前記第1下りリンク共有チャネルの繰り返し又は復号が複数スロットに跨る場合、前記第1下りリンク共有チャネルに対する上りリンクチャネルの送信、又は、第2下りリンク共有チャネルの受信、を処理する処理部と、を含む端末。
[付記2]
前記通信部は、前記繰り返しの数に関するシステム情報又は下りリンク制御情報を受信する、付記1に記載の端末。
[付記3]
前記処理部は、早期指示の設定又は実行に基づいて、前記繰り返しを認識する、付記1又は付記2に記載の端末。
[付記4]
前記処理部は、前記繰り返しの終了タイミングから、前記送信のタイミングを決定する、付記1から付記3のいずれかに記載の端末。
[付記5]
前記処理部は、前記第1下りリンク共有チャネルの処理に関する能力情報と、前記第1下りリンク共有チャネルの処理時間に関するオフセットと、の少なくとも1つに基づいて、前記第1下りリンク共有チャネルの受信タイミングから、前記送信のタイミングを決定する、付記1から付記4のいずれかに記載の端末。
[付記6]
前記第1下りリンク共有チャネルの帯域及びスロットにおいて、前記第2下りリンク共有チャネルを受信しないと想定する、付記1から付記5のいずれかに記載の端末。
[付記7]
前記第1下りリンク共有チャネルは、ランダムアクセスレスポンスを伴う、付記1から付記6のいずれかに記載の端末。
[付記8]
前記上りリンクチャネルは、メッセージ3又はhybrid automatic request(HARQ)フィードバックを伴う、付記1から付記7のいずれかに記載の端末。
[付記9]
特定端末のための第1帯域より狭い第2帯域内において、ランダムアクセスプロシージャのための第1下りリンク共有チャネルを送信する送信部と、
前記第1下りリンク共有チャネルの繰り返し又は復号が複数スロットに跨る場合、前記第1下りリンク共有チャネルに対する上りリンクチャネルの受信、又は、第2下りリンク共有チャネルの送信、を処理する処理部と、を含む基地局。
[付記10]
端末において実施される通信方法であって、
特定端末のための第1帯域より狭い第2帯域内において、ランダムアクセスプロシージャのための第1下りリンク共有チャネルを受信することと、
前記第1下りリンク共有チャネルの繰り返し又は復号が複数スロットに跨る場合、前記第1下りリンク共有チャネルに対する上りリンクチャネルの送信、又は、第2下りリンク共有チャネルの受信、を処理することと、を含む通信方法。
Claims (10)
- 特定端末のための第1帯域より狭い第2帯域内において、ランダムアクセスプロシージャのための第1下りリンク共有チャネルを受信する通信部と、
前記第1下りリンク共有チャネルの繰り返し又は復号が複数スロットに跨る場合、前記第1下りリンク共有チャネルに対する上りリンクチャネルの送信、又は、第2下りリンク共有チャネルの受信、を処理する処理部と、を含む端末。 - 前記通信部は、前記繰り返しの数に関するシステム情報又は下りリンク制御情報を受信する、請求項1に記載の端末。
- 前記処理部は、早期指示の設定又は実行に基づいて、前記繰り返しを認識する、請求項1に記載の端末。
- 前記処理部は、前記繰り返しの終了タイミングから、前記送信のタイミングを決定する、請求項1に記載の端末。
- 前記処理部は、前記第1下りリンク共有チャネルの処理に関する能力情報と、前記第1下りリンク共有チャネルの処理時間に関するオフセットと、の少なくとも1つに基づいて、前記第1下りリンク共有チャネルの受信タイミングから、前記送信のタイミングを決定する、請求項1に記載の端末。
- 前記第1下りリンク共有チャネルの帯域及びスロットにおいて、前記第2下りリンク共有チャネルを受信しないと想定する、請求項1に記載の端末。
- 前記第1下りリンク共有チャネルは、ランダムアクセスレスポンスを伴う、請求項1に記載の端末。
- 前記上りリンクチャネルは、メッセージ3又はhybrid automatic request(HARQ)フィードバックを伴う、請求項1に記載の端末。
- 特定端末のための第1帯域より狭い第2帯域内において、ランダムアクセスプロシージャのための第1下りリンク共有チャネルを送信する送信部と、
前記第1下りリンク共有チャネルの繰り返し又は復号が複数スロットに跨る場合、前記第1下りリンク共有チャネルに対する上りリンクチャネルの受信、又は、第2下りリンク共有チャネルの送信、を処理する処理部と、を含む基地局。 - 端末において実施される通信方法であって、
特定端末のための第1帯域より狭い第2帯域内において、ランダムアクセスプロシージャのための第1下りリンク共有チャネルを受信することと、
前記第1下りリンク共有チャネルの繰り返し又は復号が複数スロットに跨る場合、前記第1下りリンク共有チャネルに対する上りリンクチャネルの送信、又は、第2下りリンク共有チャネルの受信、を処理することと、を含む通信方法。
Priority Applications (4)
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| JP2024554334A JPWO2024095679A5 (ja) | 2023-10-05 | 端末及び基地局 | |
| EP23885442.6A EP4615136A4 (en) | 2022-11-03 | 2023-10-05 | TERMINAL, BASE STATION AND COMMUNICATION METHOD |
| CN202380076744.9A CN120153747A (zh) | 2022-11-03 | 2023-10-05 | 终端、基站以及通信方法 |
| US19/185,515 US20250261199A1 (en) | 2022-11-03 | 2025-04-22 | Terminal, base station, and communication method |
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| US19/185,515 Continuation US20250261199A1 (en) | 2022-11-03 | 2025-04-22 | Terminal, base station, and communication method |
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| US (1) | US20250261199A1 (ja) |
| EP (1) | EP4615136A4 (ja) |
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| US20240389099A1 (en) * | 2023-05-15 | 2024-11-21 | Mediatek Inc. | Method And Apparatus For Handling Simultaneous Reception In Mobile Communications |
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Non-Patent Citations (10)
| Title |
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| "Discussion on further UE complexity reduction for eRedCap", 3GPP TSG RAN WG1 MEETING #110BIS-E, R1-2209912, 10 October 2022 (2022-10-10) |
| "Discussion on solutions to further reduce UE complexity", 3GPP TSG RAN WG1 MEETING #110BIS-E, R1-2208416, 10 October 2002 (2002-10-10) |
| "Discussion on UE further complexity reduction", 3GPP TSG RAN WG1 MEETING #110BIS-E, R1-2208653, 10 October 2022 (2022-10-10) |
| "Further RedCap UE complexity reduction", 3GPP TSG RAN WG1 MEETING #110BIS-E, R1-2208362, 10 October 2022 (2022-10-10) |
| LENOVO, MOTOROLA MOBILITY: "The principle to constrain reduced capability NR devices", 3GPP DRAFT; R2-2007478, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. electronic; 20200817 - 20200828, 7 August 2020 (2020-08-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051912216 * |
| LG ELECTRONICS: "Discussion on further UE complexity reduction for eRedCap", 3GPP DRAFT; R1-2209451, 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, XP052277370 * |
| QUALCOMM INCORPORATED: "BW Reduction for RedCap UE", 3GPP DRAFT; R1-2107351, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210816 - 20210827, 7 August 2021 (2021-08-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP052038299 * |
| QUALCOMM INCORPORATED: "Type-A PUSCH repetition for Msg3", 3GPP DRAFT; R1-2110205, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20211010 - 20211029, 2 October 2021 (2021-10-02), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052059141 * |
| See also references of EP4615136A4 |
| XIAOJUN MA, SHARP: "Discussion on complexity reduction for eRedCap UE", 3GPP DRAFT; R1-2307855; TYPE DISCUSSION; NR_REDCAP_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; 20230821 - 20230825, 11 August 2023 (2023-08-11), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052437076 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2024095679A1 (ja) | 2024-05-10 |
| US20250261199A1 (en) | 2025-08-14 |
| EP4615136A4 (en) | 2026-02-18 |
| EP4615136A1 (en) | 2025-09-10 |
| CN120153747A (zh) | 2025-06-13 |
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