Apparatus and method

Abstract

To allow a more suitable bandwidth part (BWP) switching delay to be applied to RedCap (Reduced Capability) UE (User Equipment).SOLUTION: An apparatus according to one aspect of the present disclosure includes an information acquisition unit that acquires capability information about the apparatus, and a communication processing unit that transmits the capability information to a base station. The capability information includes delay information indicating a bandwidth part (BWP) switching delay, for RedCap UE, and the BWP switching delay is longer than a type 1 BWP switching delay and a type 2 BWP switching delay.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present disclosure relates to an apparatus and a method. [Background technology]

[0002] Mobile communication technologies are proposed by 3GPP (3rd Generation Partnership Project) (registered trademark) and defined in technical specifications (TS). In particular, 5G (5th Generation) technologies are currently being proposed and defined in TS.

[0003] As described in Non-Patent Document 1, 3GPP Release 18 (Rel-18) launched a new study item (SI) called "further NR RedCap UE complexity reduction." This SI is intended to define the functionality of Rel-18 RedCap UEs (User Equipment), which have capabilities between LPWA (Low Power Wide Area) UEs and Release 17 (Rel-17) RedCap (reduced capability) UEs. Specific use cases are expected to include industrial sensors, surveillance cameras, and wearable devices. The objectives of the SI include reducing the UE bandwidth to 5 MHz in frequency range (FR1) and reducing the UE peak data rate in FR1. As described above, UE technologies are being studied with the aim of widespread market adoption through reduced functionality and cost reduction.

[0004] For example, Non-Patent Document 2 proposes reducing the bandwidth for the data channel in FR1 to reduce the peak data rate of the UE. Furthermore, Non-Patent Document 2 describes placing a narrower bandwidth part (BWP) for Rel-18 RedCap UE within the BWP for Rel-17 RedCap UE.

[0005] For example, Non-Patent Documents 3-6 also propose content related to Rel-18 RedCap UE.

[0006] On the other hand, Non-Patent Document 7 describes the BWP switch delay, T BWPswitchDelay Furthermore, Non-Patent Document 7 describes that the UE completes the BWP switch within the BWPswitchDelay As the BWP switching delay, Type 1 BWP switching delay and Type 2 BWP switching delay are described. Non-Patent Document 8 also describes that the UE transmits capability information including bwp-SwitchingDelay indicating the BWP switching delay of Type 1 or Type 2 to the network. [Prior art documents] [Non-patent literature]

[0007] [Non-Patent Document 1] 3GPP TSG RAN meeting #94e, Electronic Meeting, December 6 - 17, 2021, RP-213661, Ericsson, “New SID on Study on further NR RedCap UE complexity reduction” [Non-patent document 2] 3GPP TSG RAN WG1 Meeting #109-e, E-meeting, May 9th - May 20th, 2022, R1-2205043, Qualcomm Incorporated, “Further complexity reduction for eRedCap device” [Non-licensed document 3] 3GPP TSG-RAN WG1 Meeting #109-e, e-Meeting, 9th - 20th May 2022, R1-2203117, Ericsson, “Potential solutions to further reduce UE complexity”

Non-licensed Document 4

Non-licensed Document 5

Non-licensed Document 6

Non-licensed Document 7

[0008] As described in Non-Patent Document 7, the inventors have found a problem in that the current 3GPP TS only has two options for BWP switching delay, namely, Type 1 BWP switching delay and Type 2 BWP switching delay, and therefore it is not possible to apply a more suitable BWP switching delay to a low-performance RedCap UE such as a Rel-18 RedCap UE.

[0009] An object of the present disclosure is to provide an apparatus and method that enables a RedCap UE to apply a more suitable BWP switching delay. [Means for solving the problem]

[0010] An apparatus according to one embodiment of the present disclosure includes an information acquisition unit that acquires capability information about the apparatus, and a communication processing unit that transmits the capability information to a base station, wherein the capability information includes delay information indicating a bandwidth portion (BWP) switching delay for a RedCap UE, and the BWP switching delay is longer than a type 1 BWP switching delay and a type 2 BWP switching delay.

[0011] An apparatus according to one embodiment of the present disclosure includes a communication processing unit that receives capability information about a user equipment from the user equipment, and an information acquisition unit that acquires delay information included in the capability information, the delay information indicating a bandwidth portion (BWP) switching delay for a RedCap UE, wherein the BWP switching delay is longer than a type 1 BWP switching delay and a type 2 BWP switching delay.

[0012] A method performed by a user equipment according to one embodiment of the present disclosure includes obtaining capability information for the user equipment and transmitting the capability information to a base station, the capability information including delay information indicating a bandwidth portion (BWP) switching delay for a RedCap UE, the BWP switching delay being longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. [Effects of the Invention]

[0013] According to the present disclosure, it is possible to apply a BWP switching delay that is more suitable for a RedCap UE. Note that according to the present disclosure, other effects may be achieved instead of or in addition to the effect. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is an explanatory diagram illustrating an example of a schematic configuration of a system according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is an explanatory diagram illustrating an example of a carrier and a BWP according to an embodiment of the present disclosure. [Figure 3] FIG. 1 is an explanatory diagram illustrating an example of a frequency band set in a BWP according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a block diagram illustrating an example of a schematic functional configuration of a base station according to an embodiment of the present disclosure. [Figure 5] FIG. 2 is a block diagram illustrating an example of a schematic hardware configuration of a base station according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a block diagram illustrating an example of a schematic functional configuration of a UE according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a block diagram illustrating an example of a schematic hardware configuration of a UE according to an embodiment of the present disclosure. [Figure 8] FIG. 10 is an explanatory diagram illustrating an example of a BWP switching delay according to an embodiment of the present disclosure. [Figure 9] FIG. 1 is a sequence diagram illustrating an example of a schematic flow of a process according to an embodiment of the present disclosure. [Figure 10]FIG. 10 is an explanatory diagram illustrating an example of a BWP switching delay according to a first modified example of the embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In this specification and drawings, elements that can be similarly described will be designated by the same reference numerals, and redundant description will be omitted.

[0016] The explanation will be given in the following order: 1. System Configuration 2. Base station configuration 3. User equipment configuration 4. Example of operation 5. Variations

[0017] <1. System configuration> An example of the configuration of a system 1 according to an embodiment of the present disclosure will be described with reference to Fig. 1. Referring to Fig. 1, the system 1 includes a base station 100, a user equipment (UE) 30, Includes UE40 and UE200.

[0018] For example, the system 1 is a system that complies with 3GPP TS. More specifically, for example, the system 1 is a system that complies with 5G or NR (New Radio) TS. Naturally, the system 1 is not limited to this example.

[0019] (1) Base station 100 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 UEs 30, 40, and 200.

[0020] For example, the base station 100 communicates with a UE (e.g., UE30, UE40, or UE200) using a protocol stack of the RAN. For example, the protocol stack includes RRC, service data adaptation protocol (SDAP), packet data convergence protocol (PDCP), radio link control (RLC), medium access control (MAC), and a physical (PHY) layer protocol. Alternatively, the protocol stack may include only some of these protocols, rather than all of them.

[0021] For example, the base station 100 is a gNB. The gNB is a node that provides NR user plane and control plane protocol terminations toward the UE and is connected to a 5G Core Network (5GC) via an NG interface. Alternatively, 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 toward the UE and operates as a secondary node in E-UTRA-NR Dual Connectivity (EN-DC).

[0022] The base station 100 may include multiple nodes. The multiple nodes may include a first node hosting a higher layer included in the protocol stack and a second node hosting a lower layer included in the protocol stack. The higher layer may include RRC, SDAP, and PDCP, and the lower layer may include RLC, MAC, and a PHY layer. The first node may be a central unit (CU), and the second node may be a distributed unit (DU). The multiple 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 radio unit (RU).

[0023] Alternatively, the base station 100 may be one of the plurality of nodes, or may be connected to other units of the plurality of nodes.

[0024] The base station 100 may be an integrated access and backhaul (IAB) donor or an IAB node.

[0025] (2) UE30, UE40 and UE200 Each of the UE 30, the UE 40, and the UE 200 communicates with a base station. For example, each of the UE 30, the UE 40, and the UE 200 communicates with the base station 100 when the UE 30, the UE 40, and the UE 200 is located within the coverage area 10 of the base station 100.

[0026] For example, each of the UE 30, UE 40, and UE 200 communicates with a base station (for example, the base station 100) using the above protocol stack.

[0027] For example, UE 30 is a normal UE that is not a RedCap UE, and UE 40 and UE 200 are RedCap UEs. A RedCap UE is a UE with reduced capabilities. Furthermore, UE 40 is a first type RedCap UE, and UE 200 is a second type RedCap UE. The first type RedCap UE is a UE with a maximum bandwidth of 20 MHz for FR1 and 100 MHz for FR2. FR1 is a frequency range from 450 MHz to 6000 MHz, and FR2 is a frequency range from 24250 MHz to 52600 MHz. The second type RedCap UE is a UE with further reduced capabilities than the first type RedCap UE. For example, the peak data rate of the second type RedCap UE is lower than the peak data rate of the first type RedCap UE. For example, the second type RedCap UE communicates with a base station using a narrower bandwidth than the first type RedCap UE. For example, the maximum bandwidth of the second type RedCap UE is smaller than the maximum bandwidth of the first type RedCap UE. The maximum bandwidth is, for example, the maximum bandwidth when transmitting and receiving specific information (e.g., user data, etc.). For example, the first type RedCap UE is a Rel-17 RedCap UE, and the second type RedCap UE is a Rel-18 RedCap UE. The second type RedCap UE may be referred to as an eRedCap UE.

[0028] In addition, in an embodiment of the present disclosure, UE200 may perform not only the operations described as the operations of UE200, but also the operations described as the operations of UE30 and / or the operations described as the operations of UE40.

[0029] (3) BWP (3-1) Setting BWP The base station 100 configures a BWP to be used by the UE within a carrier having a system bandwidth. The bandwidth of the BWP is smaller than the system bandwidth. This BWP allows the UE to communicate with the base station 100 within the carrier even if the UE's maximum bandwidth is smaller than the carrier's bandwidth. The system bandwidth, which is the bandwidth of the carrier, is also called the channel bandwidth.

[0030] For example, the BWP includes a downlink (DL) BWP and an uplink (UL) BWP. The UE receives signals from the base station 100 using the DL BWP and transmits signals to the base station 100 using the UL BWP.

[0031] 2, the base station 100 configures a BWP 60 within a carrier 50, and the UE communicates with the base station 100 using the BWP 60. The carrier 50 may be a DL carrier, and the BWP 60 may be a DL BWP. Alternatively, the carrier 50 may be an UL carrier, and the BWP 60 may be a UL BWP.

[0032] (3-2) Types of BWP The base station 100 sets a plurality of types of BWP.

[0033] -Early BWP First, the base station 100 configures an initial BWP. The initial BWP includes an initial DL BWP and an initial UL BWP. The initial DL BWP may be specified as a DL BWP with an ID value set to 0. The initial UL BWP may also be specified as a UL BWP with an ID value set to 0.

[0034] For example, the base station 100 transmits SIB1 including information indicating the initial BWP. The information includes initialDownlinkBWP and / or initialUplinkBWP included in ServingCellConfigCommon in SIB1. For example, the base station 100 may configure the initial DL BWP using initialDownlinkBWP. Alternatively, the base station 100 may configure the initial UL BWP using initialUplinkBWP. The initialDownlinkBWP includes parameters indicating the location and bandwidth of the initial DL BWP and a parameter indicating the subcarrier spacing of the initial DL BWP. The initialDownlinkBWP may also include a parameter indicating the cyclic prefix of the initial DL BWP. Similarly, the initialUplinkBWP includes parameters indicating the location and bandwidth of the initial UL BWP and a parameter indicating the subcarrier spacing of the initial UL BWP. The initialUplinkBWP may also include a parameter indicating the cyclic prefix of the initial UL BWP.

[0035] Furthermore, the initialDownlinkBWP may include a parameter indicating a Search Space Set (SSS) for the SIB1 message. For example, base station 100 may configure Search Space Set #0 (SSS #0) whose ID is set to 0 in the initial DL BWP of the primary cell as the SSS for the SIB1 message. SSS #0 is also referred to as a Type-0 PDCCH CSS Set (type-0 PDCCH common search space set). For example, the SSS for the SIB1 message may be configured for monitoring a physical downlink control channel (PDCCH) for downlink control information (DCI) with a system information radio network temporary identifier (SI-RNTI). The DCI is a DCI format used for scheduling a PDSCH, for example, DCI format 1_0. That is, base station 100 may schedule a PDSCH using DCI with a SI-RNTI and transmit the SIB1 message on the PDSCH.

[0036] Furthermore, the initialDownlinkBWP may include a parameter indicating an SSS for a random access procedure. The SSS for the random access procedure is also referred to as a Type1-PDCCH CSS Set. For example, the SSS for the random access procedure may be set for monitoring a PDCCH for a DCI with a random access radio network temporary identifier (RA-RNTI). The DCI is a DCI format used for scheduling a PDSCH, for example, DCI format 1_0. That is, base station 100 may schedule a PDSCH using a DCI with an RA-RNTI and transmit a random access response on the PDSCH.

[0037] Furthermore, the initialDownlinkBWP may include a parameter indicating an SSS for paging. The SSS for paging is also referred to as a Type2-PDCCH CSS Set. For example, the SSS for paging may be configured for monitoring a PDCCH for a DCI with a P-RNTI (paging radio network temporary identifier). The DCI is a DCI format used for scheduling a PDSCH, for example, DCI format 1_0. That is, base station 100 may schedule a PDSCH using a DCI with a P-RNTI and transmit a paging message on the PDSCH.

[0038] For example, UE30, which is a normal UE, receives the SIB1 and acquires the information included in the SIB1. Then, UE30 is configured with the initial BWP and communicates with base station 100 using the initial BWP. For example, UE30 identifies the initial DL BWP based on the initialDownlinkBWP. UE30 also identifies the initial UL BWP based on the initialUplinkBWP. UE30 may also monitor a PDCCH for DCI with SI-RNTI, RA-RNTI, and / or P-RNTI in the SSS configured using the initialDownlinkBWP. UE30 may also receive a SIB1 message, a random access response, and / or a paging message in a PDSCH scheduled using DCI with SI-RNTI, RA-RNTI, and / or P-RNTI.

[0039] When SIB1 does not include information indicating the initial DL BWP, the initial DL BWP may be the same as the band of CORESET (control resource set) #0 for scheduling SIB1. That is, 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 when there is no such information in SIB1.

[0040] -RedCap specific initial BWP Second, base station 100 sets an initial BWP for RedCap UE. Here, the initial BWP for RedCap UE is called a RedCap-specific initial BWP. A normal UE that is not a RedCap UE does not use the RedCap-specific initial BWP, and a RedCap UE uses the RedCap-specific initial BWP.

[0041] The RedCap-specific initial BWP includes an initial DL BWP for a RedCap UE and an initial UL BWP for a RedCap UE, where the initial DL BWP for a RedCap UE is referred to as a RedCap-specific initial DL BWP, and the initial UL BWP for a RedCap UE is referred to as a RedCap-specific initial UL BWP.

[0042] For example, the base station 100 transmits SIB1 including information indicating the RedCap-specific initial BWP. The information includes initialDownlinkBWP-RedCap-r17 and / or initialUplinkBWP-RedCap-r17 included in ServingCellConfigCommon in SIB1. For example, the base station 100 may configure the RedCap-specific initial DL BWP using initialDownlinkBWP-RedCap-r17. Alternatively, the base station 100 may configure the RedCap-specific initial UL BWP using initialUplinkBWP-RedCap-r17. The initialDownlinkBWP-RedCap-r17 includes parameters indicating the position and bandwidth of the RedCap-specific initial DL BWP and a parameter indicating the subcarrier spacing of the RedCap-specific initial DL BWP. The initialDownlinkBWP-RedCap-r17 may also include a parameter indicating the cyclic prefix of the RedCap-specific initial DL BWP. Similarly, initialUplinkBWP-RedCap-r17 includes parameters indicating the location and bandwidth of the RedCap-specific initial UL BWP and a parameter indicating the subcarrier spacing of the RedCap-specific initial UL BWP. Additionally, initialUplinkBWP-RedCap-r17 may include a parameter indicating the cyclic prefix of the RedCap-specific initial UL BWP.

[0043] The initialDownlinkBWP-RedCap-r17 may also include a parameter indicating the SSS for the SIB1 message, the initialDownlinkBWP may also include a parameter indicating the SSS for the random access procedure, and the initialDownlinkBWP may also include a parameter indicating the SSS for paging.

[0044] For example, the UE 40, which is the first type RedCap UE, receives the SIB1 and acquires the information included in the SIB1. The UE 40 is then configured with the RedCap-specific initial BWP and communicates with the base station 100 using the RedCap-specific initial BWP. For example, the UE 40 identifies the RedCap-specific initial DL BWP based on initialDownlinkBWP-RedCap-r17. The UE 40 also identifies the RedCap-specific initial UL BWP based on initialUplinkBWP-RedCap-r17. The UE 40 may also monitor a PDCCH for DCI with an SI-RNTI, an RA-RNTI, and / or a P-RNTI in the SSS configured using initialDownlinkBWP-RedCap-r17. The UE 40 may also receive a SIB1 message, a random access response, and / or a paging message in a PDSCH scheduled by DCI with an SI-RNTI, an RA-RNTI, and / or a P-RNTI.

[0045] Note that, when SIB1 does not include information indicating the RedCap-specific initial DL BWP, the RedCap-specific initial DL BWP may be specified based on the information indicating the initial DL BWP. Also, when SIB1 does not include information indicating the RedCap-specific initial UL BWP, the RedCap-specific initial UL BWP may be specified based on the information indicating the initial UL BWP. That is, when SIB1 includes initialDownlinkBWP-RedCap-r17, the UE 40 may specify the RedCap-specific initial DL BWP based on initialDownlinkBWP-RedCap-r17 instead of the initialDownlinkBWP. Also, when SIB1 includes initialUplinkBWP-RedCap-r17, the UE 40 may specify the RedCap-specific initial UL BWP based on initialUplinkBWP-RedCap-r17 instead of the initialUplinkBWP. Furthermore, if initialDownlinkBWP-RedCap-r17 is not included in SIB1, UE 40 may specify the initial DL BWP (which may be a RedCap-specific initial DL BWP) based on initialDownlinkBWP. Furthermore, if initialUplinkBWP-RedCap-r17 is not included in SIB1, UE 40 may specify the initial UL BWP (which may be a RedCap-specific initial UL BWP) based on initialUplinkBWP-RedCap-r17.

[0046] -BWP Third, base station 100 configures a BWP other than the initial BWP. The BWP is a UE-specific BWP and is configured using an RRC message addressed to the UE. The RRC message addressed to the UE is also called a UE-specific RRC message. For example, the BWP is simply called a BWP. Alternatively, the BWP may be called an RRC configured BWP, a configured BWP, a UE-specific BWP, or a dedicated BWP. The BWP includes a DL BWP and an UL BWP. The DL BWP may be specified as a DL BWP whose ID is set to a value other than 0. The UL BWP may be specified as a UL BWP whose ID is set to a value other than 0.

[0047] For example, the base station 100 transmits an RRC message including information indicating the BWP to the UE. For example, the RRC message is an RRC Reconfiguration message. The information indicating the BWP includes BWP-Downlink and / or BWP-Uplink included in ServingCellConfig in the RRC message. For example, the base station 100 may configure the DL BWP using BWP-Downlink. Alternatively, the base station 100 may configure the UL BWP using BWP-Uplink. BWP-Downlink includes parameters indicating the location and bandwidth of the DL BWP and a parameter indicating the subcarrier spacing of the DL BWP. BWP-Downlink may also include a parameter indicating the cyclic prefix of the DL BWP. Similarly, BWP-Uplink includes parameters indicating the location and bandwidth of the UL BWP and a parameter indicating the subcarrier spacing of the UL BWP. BWP-Uplink may also include a parameter indicating the cyclic prefix of the UL BWP.

[0048] Furthermore, the BWP-Downlink may include UE-specific parameters of the DL BWP. The UE-specific parameters of the DL BWP are also referred to as BWP-DownlinkDedicated. For example, the UE-specific parameters include parameters related to an SSS of a PDCCH. Here, the parameters related to the SSS include parameters related to a UE-specific search space set (USS) and / or parameters related to a CSS. For example, the USS and / or the CSS of the PDCCH are configured for PDCCH monitoring for DCI with a cell radio network temporary identifier (C-RNTI), a modulation and coding scheme cell radio network temporary identifier (MCS-C-RNTI), and / or a configured scheduling radio network temporary identifier (CS-RNTI). The DCI is a DCI format used for scheduling a PDSCH, such as DCI format 1_0 and / or DCI format 1_1. Furthermore, the DCI is a DCI format used for scheduling the PUSCH, and may be, for example, DCI format 0_0 and / or DCI format 0_1.

[0049] For example, base station 100 may schedule a PDSCH using DCI including a C-RNTI, an MCS-C-RNTI, and / or a CS-RNTI, and transmit downlink data (also referred to as data of a Downlink Shared Channel (DL-SCH)) in the PDSCH. Furthermore, base station 100 may schedule a PUSCH using DCI including a C-RNTI, an MCS-C-RNTI, and / or a CS-RNTI, and receive uplink data (also referred to as data of an Uplink Shared Channel (UL-SCH)) in the PUSCH. Here, the CSS set using the UE-specific parameters is also referred to as a Type3-PDCCH CSS Set.

[0050] Furthermore, the BWP-Uplink may include UE-specific parameters of the UL BWP. The UE-specific parameters of the DL BWP are also referred to as BWP-UplinkDedicated. For example, the UE-specific parameters include UE-specific PUSCH parameters applied to the UL BWP and / or DMRS (demodulation reference signal) parameters related to PUSCH transmission.

[0051] Here, base station 100 may configure the initial DL BWP with UE-specific parameters included in ServingCellConfig in the RRC message. Also, base station 100 may configure the initial UL BWP with UE-specific parameters included in ServingCellConfig in the RRC message. For example, SSS-related parameters for PDCCH monitoring for C-RNTI, MCS-C-RNTI, and / or DCI with CS-RNTI may be configured for the initial DL BWP. Also, UE-specific PUSCH parameters and / or DMRS-related parameters related to PUSCH transmission may be configured for the initial UL BWP.

[0052] For example, UE30 or UE40 receives the RRC message and acquires the information included in the RRC message. Then, UE30 or UE40 is configured with the BWP and communicates with base station 100 using the BWP. For example, UE30 or UE40 identifies the DL BWP based on a BWP-Downlink. Also, UE30 or UE40 identifies the UL BWP based on a BWP-Uplink. Also, UE30 or UE40 may monitor a PDCCH for DCI with a C-RNTI, an MCS-C-RNTI, and / or a CS-RNTI in an SSS configured using the BWP-Downlink.

[0053] Furthermore, when UE-specific parameters are configured for the initial DL BWP, UE30 or UE40 may monitor the PDCCH for DCI with C-RNTI, MCS-C-RNTI, and / or CS-RNTI in the SSS configured based on the UE-specific parameters in the initial DL BWP.

[0054] Furthermore, UE30 or UE40 may receive downlink data (DL-SCH data) in a PDSCH scheduled by a DCI including a C-RNTI, an MCS-C-RNTI, and / or a CS-RNTI. Furthermore, UE30 or UE40 may transmit uplink data (UL-SCH data) in a PUSCH scheduled by a DCI including a C-RNTI, an MCS-C-RNTI, and / or a CS-RNTI. Here, UE30 or UE40 may transmit uplink data (PUSCH transmission) and / or a DMRS associated with the PUSCH based on UE-specific parameters included in BWP-Uplink. Furthermore, UE30 or UE40 may transmit uplink data (PUSCH transmission) and / or a DMRS associated with the PUSCH based on UE-specific parameters in the initial UL BWP.

[0055] Base station 100 may configure one or more DL BWPs for one UE in one serving cell. In this case, one DL BWP of the one or more DL BWPs is used by the UE as the Active DL BWP. For example, the RRC message 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 information element is firstActiveDownlinkBWP-Id. Furthermore, the Active DL BWP may be switched. For example, base station 100 transmits DCI including information indicating the DL BWP to the UE, and the UE switches the Active DL BWP to the DL BWP indicated by the information. The DCI is DCI (e.g., DCI format 1_1) used for PDSCH scheduling, and the information is a Bandwidth Part Indicator. Furthermore, for example, when a timer related to the BWP expires, the UE switches the Active DL BWP to the Default DL BWP. For example, the RRC message includes an information element indicating a Default Downlink BWP, and the UE uses the DL BWP indicated by the information element as the Default Downlink BWP. The timer is bwp-InactivityTimer, and the information element is defaultDownlinkBWP-Id. Note that switching of the Active DL BWP may be further controlled by a Medium Access Control (MAC) entity.

[0056] Base station 100 may configure one or more UL BWPs for one UE in one serving cell. In this case, one UL BWP of the one or more UL BWPs is used by the UE as the Active UL BWP. For example, the RRC message includes an information element indicating the first Active UL BWP, and the UE initially uses the UL BWP indicated by the information element as the Active UL BWP. The information element is firstActiveUplinkBWP-Id. Furthermore, the Active UL BWP may be switched. For example, base station 100 transmits DCI including information indicating the UL BWP to the UE, and the UE switches the Active UL BWP to the UL BWP indicated by the information. The DCI is DCI used for PUSCH scheduling (e.g., DCI format 0_1), and the information is a Bandwidth Part Indicator. Note that switching of the Active DL BWP may also be controlled by the MAC entity.

[0057] For example, the plurality of DL BWPs may be up to four DL BWPs. For example, the plurality of UL BWPs may be up to four UL BWPs. Here, as described above, base station 100 may configure an SSS for each of one or more DL BWPs configured in one serving cell. Here, the one or more DL BWPs include an initial DL BWP and a UE-specific DL BWP.

[0058] (4) Frequency bands within BWP (4-1) Frequency band setting For example, the base station 100 sets a frequency band to be used by a UE within the BWP. The bandwidth of the frequency band is smaller than the bandwidth of the BWP. The frequency band allows the UE to communicate at a low peak data rate using the frequency band. The UE is, for example, the second type RedCap UE, such as the UE 200.

[0059] For example, a DL frequency band is set in the DL BWP, and a UL frequency band is set in the UL BWP. For example, UE 200 receives a signal from base station 100 using the DL frequency band in the DL BWP, and transmits a signal to base station 100 using the UL frequency band in the UL BWP.

[0060] 3, the base station 100 configures a frequency band 70 within a BWP 60, and the UE communicates with the base station 100 using the frequency band 70. The BWP 60 may be a DL BWP, and the frequency band 70 may be a DL frequency band. Alternatively, the BWP 60 may be a UL BWP, and the frequency band 70 may be a UL frequency band.

[0061] For example, the frequency band is a UE-specific BWP and is configured using an RRC message addressed to the UE. For example, the base station 100 transmits the RRC message to the UE 200, and the UE 200 receives the RRC message. Then, the UE 200 is configured with the BWP and the frequency band and communicates with the base station 100 using the frequency band. For example, the RRC message is an RRC Reconfiguration message.

[0062] For example, UE 200 may receive or transmit a signal using the frequency band and may receive or transmit another signal using the BWP. As an example, UE 200 may receive a physical downlink control channel (PDCCH) using the BWP, receive a physical downlink shared channel (PDSCH) using the frequency band, and transmit a physical uplink shared channel (PUSCH). For example, UE 200 may receive DCI used for scheduling the PDSCH using the PDCCH in the DL BWP. UE 200 may also receive DCI used for scheduling the PUSCH using the PDCCH in the DL BWP. For example, a CRC (CRC parity bit) scrambled to a C-RNTI, an MCS C-RNTI, and / or a CS-RNTI may be added to the DCI used for scheduling the PDSCH and / or the DCI used for scheduling the PUSCH. As described above, the DCI used for scheduling the PDSCH and / or the DCI used for scheduling the PUSCH may include a Bandwidth Part Indicator. Furthermore, the UE 200 may perform reception on the PDSCH scheduled by the DCI used for scheduling the PDSCH. Furthermore, the UE 200 may perform transmission on the PUSCH scheduled by the DCI used for scheduling the PUSCH. Here, reception on the PDSCH may be performed in the DL frequency band. Furthermore, transmission on the PUSCH may be performed in the UL frequency band.

[0063] For example, only one frequency band is configured in each BWP. That is, only one DL frequency band is configured in each DL BWP, and only one UL frequency band is configured in each UL BWP. UE 200 uses the one DL frequency band configured in the DL BWP and the one UL frequency band configured in the UL BWP.

[0064] Alternatively, multiple frequency bands may be configured within each BWP. That is, multiple DL frequency bands may be configured within each DL BWP, and multiple UL frequency bands may be configured within each UL BWP. UE 200 may use an active DL frequency band among the multiple DL frequency bands configured within the DL BWP, and may use an active UL frequency band among the multiple UL frequency bands configured within the UL BWP.

[0065] Note that, on the premise that the frequency band configured in the BWP is distinguished from the existing BWP, the frequency band configured in the BWP may also be called a BWP. The existing BWPs are the RRC Configured BWP, the initial BWP, and the RedCap specific initial BWP. As an example, the frequency band configured in the BWP may be called a BWP for Rel-18 RedCap UE, or a Rel-18 RedCap BWP.

[0066] (4-2) Frequency band switching For example, in response to the switching of the BWP, the frequency band within the BWP is also switched. For example, the UE 200 switches the Active BWP from a first BWP to a second BWP. In response to the switching of the Active BWP, the UE 200 also switches the frequency band from the frequency band within the first BWP to the frequency band within the second BWP. Then, the UE 200 communicates with the base station 100 using the frequency band within the second BWP.

[0067] As described above, for example, BWP switching is performed in response to reception of DCI including information indicating a BWP. Specifically, for example, UE200 switches the Active BWP to the BWP in response to reception of DCI including information indicating a BWP. In response to switching of the Active BWP, UE200 also switches the frequency band to a frequency band within the BWP. The BWP and the Active BWP may be a DL BWP and an Active DL BWP, or may be a UL BWP and an Active UL BWP. For example, the information included in the DCI is a Bandwidth Part Indicator.

[0068] As described above, for example, the BWP is switched in response to the expiration of a timer related to the BWP. Specifically, for example, the UE 200 switches the Active DL BWP to the Default DL BWP in response to the expiration of the timer. In response to the switching of the Active BWP, the UE 200 also switches the frequency band to the frequency band in the Default DL BWP. For example, the timer is a bwp-InactivityTimer.

[0069] As described above, multiple frequency bands may be configured within each BWP. In this case, an active frequency among the multiple frequency bands may be switched. For example, the UE 200 may switch the active frequency from a first frequency band within the BWP to a second frequency band within the BWP. The active frequency band may be switched in response to reception of DCI including information indicating the frequency band within the BWP or expiration of a timer related to the frequency band within the BWP.

[0070] <2. Base station configuration> An example of the configuration of the base station 100 according to the embodiment of the present disclosure will be described with reference to FIGS.

[0071] (1) Functional configuration First, an example of a functional configuration of a base station 100 according to an embodiment of the present disclosure will be described with reference to Fig. 4. Referring to Fig. 4, the base station 100 includes a radio communication unit 110, a network communication unit 120, a storage unit 130, and a processing unit 140.

[0072] The wireless communication unit 110 transmits and receives signals wirelessly. For example, the wireless communication unit 110 receives signals from UEs and transmits signals to UEs.

[0073] The network communication unit 120 receives signals from the network and transmits signals to the network.

[0074] The storage unit 130 stores various information for the base station 100 .

[0075] The processing unit 140 provides various functions of the base station 100. The processing unit 140 includes an information acquisition unit 141 and a communication processing unit 143. The processing unit 140 may further include other components in addition to these components. That is, the processing unit 140 may perform operations other than those of these components. The specific operations of the information acquisition unit 141 and the communication processing unit 143 will be described in detail later.

[0076] For example, the processing unit 140 (communication processing unit 143) communicates with UEs (e.g., UE30, UE40, and UE200) via the radio communication unit 110. For example, the processing unit 140 (communication processing unit 143) communicates with core network nodes and other base stations via the network communication unit 120.

[0077] (2) Hardware configuration Next, an example of a hardware configuration of the base station 100 according to an embodiment of the present disclosure will be described with reference to Fig. 5. Referring to Fig. 5, 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.

[0078] 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.

[0079] 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, and the like.

[0080] The network interface 185 is, for example, a network adapter, and transmits signals to and receives signals from a network.

[0081] The processor 187 performs digital processing of signals transmitted and received via the antenna 181 and the RF circuit 183. The digital processing includes processing of a protocol stack of the RAN. 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.

[0082] Memory 189 stores programs executed by processor 187, parameters related to the programs, and various other information. Memory 189 may include at least one of a read-only memory (ROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a random access memory (RAM), and a flash memory. All or a portion of memory 189 may be included within processor 187.

[0083] The storage 191 stores various information and may include at least one of an SSD (solid state drive) and an HDD (hard disc drive).

[0084] 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.

[0085] 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.

[0086] Considering the above hardware configuration, 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 processing unit 140. The program may be a program that causes the processor to perform the operations of processing unit 140.

[0087] <3. User device configuration> An example of the configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to FIGS.

[0088] (1) Functional configuration First, an example of a functional configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to Fig. 6. Referring to Fig. 6, the UE 200 includes a radio communication unit 210, a storage unit 220, and a processing unit 230.

[0089] The wireless communication unit 210 transmits and receives signals wirelessly. For example, the wireless communication unit 210 receives signals from a base station and transmits signals to the base station.

[0090] The storage unit 220 stores various information for the UE 200 .

[0091] The processing unit 230 provides various functions of the UE 200. The processing unit 230 includes 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 specific operations of the information acquisition unit 231 and the communication processing unit 233 will be described in detail later.

[0092] For example, the processing unit 230 (communication processing unit 233) communicates with a base station (for example, the base station 100) via the wireless communication unit 210.

[0093] (2) Hardware configuration Next, an example of a hardware configuration of the UE 200 according to the embodiment of the present disclosure will be described with reference to Fig. 7. Referring to Fig. 7, the UE 200 includes an antenna 281, an RF circuit 283, a processor 285, a memory 287, and a storage 289.

[0094] 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.

[0095] 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, and the like.

[0096] 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 a 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.

[0097] The memory 287 stores programs executed by the processor 285, parameters related to the programs, and various other information. The memory 287 may include at least one of a ROM, an EPROM, an EEPROM, a RAM, and a flash memory. All or a part of the memory 287 may be included within the processor 285.

[0098] The storage 289 stores various information and may include at least one of an SSD and an HDD.

[0099] 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.

[0100] The processing unit 230 may be implemented by a system on chip (SoC) 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.

[0101] Considering the above hardware configuration, 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 operation of processing unit 230. The program may be a program that causes the processor to execute the operation of processing unit 230.

[0102] <4. Example of operation> 8 and 9, an example of the operation of the base station 100 and the UE 200 according to the embodiment of the present disclosure will be described.

[0103] The UE 200 (information acquisition unit 231) acquires capability information about the UE 200. The UE 200 (communication processing unit 233) transmits the capability information to the base station 100. In particular, in an embodiment of the present disclosure, the capability information includes delay information indicating a BWP switching delay for a RedCap UE, and the BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay.

[0104] The base station 100 (communication processing unit 143) receives the capability information from the UE 200. The base station 100 (information acquisition unit 141) acquires the delay information included in the capability information.

[0105] This makes it possible to apply a BWP switching delay that is more suitable for RedCap UEs, for example. More specifically, for example, it is possible to apply a longer BWP switching delay to the second type of RedCap UEs.

[0106] (1) Capability information For example, the capability information is included in a UE Capability Information message. That is, the UE 200 (communication processing unit 233) transmits a UE Capability Information message including the capability information to the base station 100, and the base station 100 (communication processing unit 143) receives the UE Capability Information message.

[0107] For example, the capability information is UE-NR-Capability included in UE-Capability-RAT-ContainerList in the UE Capability Information message.

[0108] (2) Delay Information As described above, the delay information indicates a BWP switching delay for a RedCap UE, for example, the RedCap UE is the second type RedCap UE. That is, the delay information indicates a BWP switching delay for the second type RedCap UE.

[0109] For example, the BWP switching delay is another type of BWP switching delay that is longer than the type 1 BWP switching delay and the type 2 BWP switching delay. That is, the time duration of the BWP switching delay may be longer (defined as a longer duration) than the type 1 BWP switching delay and / or the type 2 BWP switching delay. The delay information indicates the other type of BWP switching delay as one type of BWP switching delay selected from three or more types of BWP switching delays including the type 1 BWP switching delay, the type 2 BWP switching delay, and the other type of BWP switching delay. For example, the other type of BWP switching delay is a type 3 BWP switching delay. That is, the UE 200 (information acquisition unit 231) selects the type 3 BWP switching delay from the type 1 BWP switching delay, the type 2 BWP switching delay, and the type 3 BWP switching delay, and includes delay information indicating the type 3 BWP switching delay in the capability information.

[0110] The Type 1 BWP switching delay and the Type 2 BWP switching delay may be defined according to the slot length. Similarly, the BWP switching delay indicated by the delay information (e.g., Type 3 BWP switching delay) may also be defined according to the slot length.

[0111] Referring to the example in Figure 8, the BWP switching delay, T BWPswitchDelay As shown, the type 1 BWP switching delay, the type 2 BWP switching delay, and the type 3 BWP switching delay are shown. BWPswitchDelaymay be defined according to the slot length. For example, the Type 1 BWP switching delay is 1 slot when the slot length is 1 millisecond, and 2 slots when the slot length is 0.5 seconds. The Type 2 BWP switching delay is 3 slots when the slot length is 1 millisecond, and 5 slots when the slot length is 0.5 seconds. The Type 1 BWP switching delay and the Type 2 BWP switching delay may be BWP switching delays for normal UEs that are not RedCap UEs and / or for RedCap UEs. The UE may be configured to receive the BWPs T BWPswitchDelay The BWP switching must be completed within the specified time. The Type 3 BWP switching delay is 10 slots for a 1-millisecond slot length and 20 slots for a 0.5-second slot length. For either slot length, the Type 2 BWP switching delay is longer than the Type 1 BWP switching delay, and the Type 3 BWP switching delay is longer than the Type 2 BWP switching delay.

[0112] Of course, the Type 3 BWP switching delay is not limited to the example shown in Fig. 8. The Type 3 BWP switching delay may be any BWP switching delay longer than the Type 2 BWP switching delay. For example, in the case of a 1 millisecond slot length, the Type 3 BWP switching delay may be any BWP switching delay between 4 and 9 slots, or may be 11 slots or more.

[0113] For example, the delay information is bwp-SwitchingDelay included in phy-Parameters in UE-NR-Capability. bwp-SwitchingDelay indicates one of Type 1 BWP switching delay, Type 2 BWP switching delay, and Type 3 BWP switching delay shown in FIG. 8, but here it particularly indicates Type 3 BWP switching delay.

[0114] In addition, two or more BWP switching delays may be defined as the BWP switching delay for the RedCap UE, not just one BWP switching delay. For example, a type 3 BWP switching delay and a type 4 BWP switching delay may be defined as the BWP switching delay for the RedCap UE, and the delay information may indicate one of the type 3 BWP switching delay and the type 4 BWP switching delay.

[0115] (3) Switching For example, the UE 200 (communication processing unit 233) completes the switching of the BWP and / or the switching of the frequency band within the BWP within the time duration of the BWP switching delay. That is, the UE 200 (communication processing unit 233) completes the switching of the BWP and / or the switching of the frequency band within the BWP within the time duration according to the delay information.

[0116] For example, in response to receiving DCI including information indicating a BWP, UE200 (communication processing unit 233) completes switching of the Active BWP to the BWP and / or switching of the frequency band to a frequency band within the BWP within the BWP switching delay period. The BWP and the Active BWP may be a DL BWP and an Active DL BWP, or may be a UL BWP and an Active UL BWP. As described above, for example, the information included in the DCI is a Bandwidth Part Indicator. As described above, the above information may be included in DCI used for scheduling the PDSCH. Also, the above information may be included in DCI used for scheduling the PUSCH. Here, the BWP (e.g., BWP index) indicated by the above information may correspond to the BWP to be activated (e.g., the index of the BWP to be activated). That is, the BWP (e.g., BWP index) indicated by the above information may correspond to the BWP to be switched to (e.g., the index of the BWP to be switched to). Here, the BWP to be activated and / or the BWP to be switched to is also referred to as a scheduled BWP. Also, the BWP (i.e., DL BWP) from which the DCI including the above information is transmitted is also referred to as a scheduling BWP. For example, the above information included in DCI used for scheduling the PDSCH may be used to indicate the index of the DL BWP for which reception on the PDSCH is performed (i.e., the index of the DL BWP to be scheduled). Furthermore, the above information included in the DCI used for scheduling the PUSCH may be used to indicate the index of the UL BWP in which transmission on the PUSCH is performed (i.e., the index of the UL BWP to be scheduled). Furthermore, the DCI used for scheduling the PDSCH may include information indicating resource allocation in the frequency domain (frequency domain resource assignment). The information indicating resource allocation in the frequency domain is also referred to as a field indicating resource allocation in the frequency domain. For example, the information indicating resource allocation in the frequency domain indicates resource allocation of the PDSCH. Here, the number of bits of the information indicating resource allocation in the frequency domain may be determined based on the size of the Active DL BWP (i.e., the number of resource blocks of the Active DL BWP, also referred to as the bandwidth of the Active DL BWP). The resource block is also referred to as a physical resource block. That is, the UE 200 (communication processing unit 233) may determine the number of bits of the information indicating resource allocation in the frequency domain based on the size of the Active DL BWP. Here, as described above, the size of the Active DL BWP may be determined based on parameters indicating the position and bandwidth of the Active DL BWP and / or parameters indicating the subcarrier spacing of the Active DL BWP. Also, as described above, the Active DL BWP corresponds to the scheduled DL BWP and / or the DL BWP to be switched to. Here, the number of bits of information indicating resource allocation in the frequency domain included in DCI used for scheduling the PDSCH may be determined based on the size of the DL frequency band (i.e., the number of resource blocks in the DL frequency band, also referred to as the bandwidth of the DL frequency band). That is, the UE 200 (communication processing unit 233) may determine the number of bits of information indicating resource allocation in the frequency domain based on the size of the DL frequency band. For example, the size of the DL frequency band may be determined based on parameters indicating the position and bandwidth of the DL frequency band and / or parameters indicating the subcarrier spacing of the DL frequency band. Also, as described above, the DL frequency band corresponds to the DL frequency band set in the Active DL BWP. Here, the Active DL BWP in which the DL frequency band is set corresponds to the scheduled DL BWP and / or the DL BWP to which the DL frequency band is switched. For example, when a DL frequency band is not configured, UE200 (communication processing unit 233) may determine the number of bits of information indicating resource allocation in the frequency domain included in DCI used for scheduling the PDSCH based on the size of the Active DL BWP. Also, when a DL frequency band is configured, UE200 (communication processing unit 233) may determine the number of bits of information indicating resource allocation in the frequency domain based on the size of the DL frequency band. That is, UE200 (communication processing unit 233) may specify whether to determine the number of bits of information indicating resource allocation in the frequency domain based on the size of the Active DL BWP or the size of the DL frequency band, depending on whether a DL frequency band is configured. As described above, a CRC scrambled by the C-RNTI, MCS C-RNTI, and / or CS-RNTI may be added to the DCI used for scheduling the PDSCH. Furthermore, the DCI used for scheduling the PUSCH may include information indicating resource allocation in the frequency domain (frequency domain resource assignment). For example, the information indicating resource allocation in the frequency domain indicates resource allocation of the PUSCH. Here, the number of bits of the information indicating resource allocation in the frequency domain may be determined based on the size of the Active UL BWP (i.e., the number of resource blocks of the Active UL BWP, also referred to as the bandwidth of the Active UL BWP). That is, the UE 200 (communication processing unit 233) may determine the number of bits of the information indicating resource allocation in the frequency domain based on the size of the Active UL BWP. Here, as described above, the size of the Active UL BWP may be determined based on parameters indicating the position and bandwidth of the Active UL BWP and / or parameters indicating the subcarrier spacing of the Active UL BWP. Also, as described above, the Active UL BWP corresponds to the UL BWP to be switched to and / or the UL BWP to be scheduled. Here, the number of bits of information indicating resource allocation in the frequency domain included in DCI used for scheduling the PUSCH may be determined based on the size of the UL frequency band (i.e., the number of resource blocks in the UL frequency band). That is, UE 200 (communication processing unit 233) may determine the number of bits of information indicating resource allocation in the frequency domain based on the size of the UL frequency band. For example, the size of the UL frequency band may be determined based on parameters indicating the position and bandwidth of the UL frequency band and / or parameters indicating the subcarrier spacing of the UL frequency band. Furthermore, as described above, the UL frequency band corresponds to the UL frequency band set in the Active UL BWP. For example, when a UL frequency band is not configured, UE 200 (communication processing unit 233) may determine the number of bits of information indicating resource allocation in the frequency domain included in DCI used for scheduling the PUSCH based on the size of the Active UL BWP. Furthermore, when a UL frequency band is configured, UE 200 (communication processing unit 233) may determine the number of bits of information indicating resource allocation in the frequency domain based on the size of the UL frequency band. That is, UE 200 (communication processing unit 233) may specify whether to determine the number of bits of information indicating resource allocation in the frequency domain based on the size of the Active UL BWP or the size of the UL frequency band, depending on whether a UL frequency band is configured. As described above, a CRC scrambled by the C-RNTI, MCS C-RNTI, and / or CS-RNTI may be added to the DCI used for scheduling the PUSCH.

[0117] For example, the UE 200 (communication processing unit 233) completes switching of the Active DL BWP to the Default DL BWP and switching of the frequency band to the frequency band in the Default DL BWP within the BWP switching delay period in response to expiration of a timer related to the BWP. As described above, for example, the timer is a bwp-InactivityTimer.

[0118] As described above, multiple frequency bands may be set in each BWP, and an active frequency among the multiple frequency bands may be switched. In such a case, the UE 200 (communication processing unit 233) may complete the switching of the active frequency in the BWP within the BWP switching delay period.

[0119] For example, based on the delay information, the base station 100 (communication processing unit 143) allocates radio resources to the UE 200. That is, the base station 100 (communication processing unit 143) does not allocate radio resources to the UE 200 during the period in which the UE 200 switches between the BWP and the frequency band within the BWP, but allocates radio resources to the UE 200 after the switching is completed.

[0120] (4) Processing flow An example of processing according to an embodiment of the present disclosure will be described with reference to FIG.

[0121] The UE 200 (information acquisition unit 231) acquires capability information for the UE 200 (S410). In particular, the capability information includes delay information indicating a BWP switching delay for a RedCap UE, the BWP switching delay being longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay.

[0122] The UE 200 (communication processing unit 233) transmits the capability information to the base station 100 (S420). The base station 100 (communication processing unit 143) receives the capability information from the UE 200.

[0123] The base station 100 (information acquisition unit 141) acquires the delay information included in the capability information (S430).

[0124] <5. Variations> First to third modified examples according to the embodiment of the present disclosure will be described with reference to FIG.

[0125] (1) First Modification: Delay Information In the above-described example of the embodiment of the present disclosure, the UE 200 (information acquisition unit 231) selects the type 3 BWP switching delay from among the type 1 BWP switching delay, the type 2 BWP switching delay, and the type 3 BWP switching delay, and includes delay information indicating the type 3 BWP switching delay in the capability information. However, the delay information according to the embodiment of the present disclosure is not limited to this example.

[0126] As a first variant, the delay information may be separate from other delay information indicating one type of BWP switching delay selected from two or more types of BWP switching delay including a type 1 BWP switching delay or a type 2 BWP switching delay.

[0127] The other delay information is bwp-SwitchingDelay. That is, the delay information may be information other than bwp-SwitchingDelay. For example, the delay information may be bwp-SwitchingDelay-RedCap-r18.

[0128] The capability information including the delay information may not include the other delay information. Specifically, the UE-NR-Capability may include only one of bwp-SwitchingDelay and bwp-SwitchingDelay-RedCap-r18, rather than both. This can, for example, avoid the coexistence of two BWP switching delays.

[0129] The delay information may indicate the BWP switching delay as one BWP switching delay selected from a plurality of types of BWP switching delays for RedCap UE. That is, UE 200 (information acquisition unit 231) may select the BWP switching delay from the plurality of types of BWP switching delays for RedCap UE, and include delay information indicating the BWP switching delay in the capability information.

[0130] Each of the multiple types of BWP switching delays may be longer than the Type 1 BWP switching delay and the Type 2 BWP switching delay. That is, each type of BWP switching delay indicated by bwp-SwitchingDelay-RedCap-r18 may be longer than the Type 1 BWP switching delay and the Type 2 BWP switching delay indicated by bwp-SwitchingDelay.

[0131] Referring to the example of FIG. 10, there are multiple types of BWP switching delays for RedCap UE, including Type 1 and Type 2 BWP switching delays T BWPswitchDelay-RedCap is shown. T BWPswitchDelay-RedCap is defined according to the slot length. For example, the above Type 1 BWP switching delay for a RedCap UE is 10 slots for a slot length of 1 ms and 20 slots for a slot length of 0.5 s. The above Type 2 BWP switching delay for a RedCap UE is 30 slots for a slot length of 1 ms and 50 slots for a slot length of 0.5 s. For either slot length, T BWPswitchDelay-RedCap is T BWPswitchDelay For example, the delay information is longer than T BWPswitchDelay-RedCap Indicates Type 1 or Type 2.

[0132] Naturally, the BWP switching delay for RedCap UE is T BWPswitchDelay-RedCap is not limited to the example of FIG. BWPswitchDelay-RedCap is T BWPswitchDelay For example, the above T BWPswitchDelay-RedCap In the case of a slot length of 1 millisecond, the number of slots may be any of 4 to 9 slots, any of 11 to 19 slots, or 21 slots or more.

[0133] The first modification of the embodiment of the present disclosure has been described above. According to the first modification, for example, it is possible to flexibly introduce delay information dedicated to RedCap UE without changing other existing delay information.

[0134] (2) Second Modification: Delay Information In a first modification of the embodiment of the present disclosure, the capability information including the delay information does not include the other delay information. Specifically, the UE-NR-Capability does not include both bwp-SwitchingDelay and bwp-SwitchingDelay-RedCap-r18, but includes only one of bwp-SwitchingDelay and bwp-SwitchingDelay-RedCap-r18. However, the capability information according to the embodiment of the present disclosure is not limited to this example.

[0135] As a second variant, the capability information may further include the other delay information in addition to the delay information, and the delay information may be information that takes priority over the other delay information.

[0136] The UE 200 may transmit the capability information including the delay information and the other delay information to the base station 100, and the base station 100 may prioritize the delay information over the other delay information. Specifically, the base station 100 (communication processing unit 143) may allocate radio resources to the UE 200 based on the delay information rather than the other delay information.

[0137] The second modification of the embodiment of the present disclosure has been described above. According to the second modification, for example, it is possible to reduce the number of rules for UE.

[0138] (3) Third Modification: System In the above-described example of the embodiment of the present disclosure, the system 1 is a system that complies with 5G or NR TS. However, the system 1 according to the embodiment of the present disclosure is not limited to this example.

[0139] As a third modification of the embodiment of the present disclosure, the system 1 may be a system that complies with other TSs of 3GPP. For example, the system 1 may be a system that complies with TSs of next-generation (e.g., 6G).

[0140] Alternatively, the system 1 may be a system that complies with the TS of another standardization organization for mobile communications.

[0141] The third variant of the embodiment of the present disclosure may be combined with the first variant or the second variant of the embodiment of the present disclosure.

[0142] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to these embodiments. It will be understood by those skilled in the art that these embodiments are merely examples and that various modifications are possible without departing from the scope and spirit of the present disclosure.

[0143] For example, the steps in the processes described herein do not necessarily have to be performed in chronological order according to the order depicted in the flowcharts or sequence diagrams. For example, the steps in the processes may be performed in an order different from that depicted in the flowcharts or sequence diagrams, or may be performed in parallel. Furthermore, some of the steps in the processes may be deleted, and additional steps may be added to the processes.

[0144] For example, a method including the operation of one or more components of the apparatus described herein may be provided, or a program for causing a computer to execute the operation of the components may be provided. Also, a non-transitory tangible computer-readable storage medium having the program recorded thereon may be provided. Naturally, such methods, programs, and non-transitory tangible computer-readable storage media are also included in the present disclosure.

[0145] For example, one or more components of the base station described herein may be included in a module for the base station, or the module may be provided, i.e., a module for the base station that performs the processing for the base station described herein may be provided.

[0146] For example, one or more components of a user equipment (UE) described herein may be included in or provided as a module for the UE, i.e., a module for the UE that performs the processing for the UE described herein may be provided.

[0147] For example, in this disclosure, user equipment (UE) may be referred to by other names such as terminal apparatus, terminal, mobile station, mobile terminal, mobile device, mobile unit, subscriber station, subscriber terminal, subscriber device, subscriber unit, radio station, radio terminal, radio device, radio unit, wireless station, wireless terminal, wireless device, wireless unit, access station, access terminal, access device, access unit, remote station, remote terminal, remote device, or remote unit.

[0148] For example, in the present disclosure, a UE may be a mobile phone terminal such as a smartphone, a tablet terminal, a personal computer, a mobile router, or a wearable device. Alternatively, a UE may be a device installed in a mobile object, or the mobile object itself. The mobile object may be a vehicle such as a car or train, an air vehicle such as an airplane or drone, or another mobile object such as a ship. Alternatively, in the present disclosure, a UE may be other Internet of Things (IoT) devices such as sensors and cameras. The UE may be mobile or fixed.

[0149] For example, in the present disclosure, "transmit" may mean performing processing at least one layer in a protocol stack used for transmission, or may mean physically transmitting a signal wirelessly or via a wire. Alternatively, "transmit" may mean a combination of performing processing at least one layer and physically transmitting a signal wirelessly or via a wire. Similarly, "receive" may mean performing processing at least one layer in a protocol stack used for reception, or may mean physically receiving a signal wirelessly or via a wire. Alternatively, "receive" may mean a combination of processing at least one layer and physically receiving a signal wirelessly or via a wire. The at least one layer may be rephrased as at least one protocol.

[0150] For example, in this disclosure, "obtain / acquire" may mean obtaining information from stored information, obtaining information from information received from other nodes, or obtaining information by generating the information.

[0151] For example, in this disclosure, "include" and "comprise" do not mean including only the listed items, but may mean including only the listed items or may include additional items in addition to the listed items.

[0152] For example, in this disclosure, "or" does not mean an exclusive or, but rather a logical or.

[0153] The technical features included in the above-described embodiments may be expressed as the following features: Naturally, the present disclosure is not limited to the following features.

[0154] (Feature 1) An apparatus (200), an information acquisition unit (231) that acquires capability information about the device; a communication processing unit (233) that transmits the capability information to a base station (100); Equipped with The capability information includes delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE), The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. Device.

[0155] (Feature 2) the BWP switching delay is another type of BWP switching delay that is longer than the Type 1 BWP switching delay and the Type 2 BWP switching delay; The delay information indicates the other type of BWP switching delay as one type of BWP switching delay selected from three or more types of BWP switching delays including the type 1 BWP switching delay, the type 2 BWP switching delay, and the other type of BWP switching delay; Feature 1. The device according to feature 1.

[0156] (Feature 3) 3. The apparatus of feature 2, wherein the other type of BWP switching delay is a Type 3 BWP switching delay.

[0157] (Feature 4) 4. The device of feature 2 or 3, wherein the delay information is bwp-SwitchingDelay.

[0158] (Feature 5) The device described in Feature 1, wherein the delay information is information separate from other delay information indicating one type of BWP switching delay selected from two or more types of BWP switching delay including the Type 1 BWP switching delay and the Type 2 BWP switching delay.

[0159] (Feature 6) 6. The apparatus of feature 5, wherein the capability information does not include the other delay information.

[0160] (Feature 7) the capability information further includes the other delay information; The delay information is information that takes priority over the other delay information. Feature 5. The device according to feature 5.

[0161] (Feature 8) The delay information indicates the BWP switching delay as one BWP switching delay selected from a plurality of types of BWP switching delays for a RedCap UE; and each of the plurality of types of BWP switching delays is longer than the Type 1 BWP switching delay and the Type 2 BWP switching delay; The device according to any one of Features 5 to 7.

[0162] (Feature 9) The device according to any one of features 5 to 8, wherein the other delay information is bwp-SwitchingDelay.

[0163] (Feature 10) 10. The apparatus according to any one of features 1 to 9, wherein the BWP switching delay is determined according to a slot length.

[0164] (Feature 11) The type 1 BWP switching delay and the type 2 BWP switching delay are determined according to a slot length; The Type 1 BWP switching delay is 1 slot for a 1 ms slot length; The Type 2 BWP switching delay is 3 slots for a 1 ms slot length. The device according to any one of Features 1 to 10.

[0165] (Feature 12) 12. The device according to any one of features 1 to 11, wherein the communication processing unit completes switching of the BWP and switching of the frequency band within the BWP within a period of the BWP switching delay.

[0166] (Feature 13) 13. The apparatus of any one of features 1 to 12, wherein the RedCap UE is a second type RedCap UE having a further reduced capability than the first type RedCap UE having a maximum bandwidth of 20 MHz for a frequency range of 450 MHz to 6000 MHz.

[0167] (Feature 14) Feature 14. The apparatus of feature 13, wherein a peak data rate of the second type RedCap UE is lower than a peak data rate of the first type RedCap UE.

[0168] (Feature 15) 15. The device according to any one of features 1 to 14, wherein the device is a user device or a module for a user device.

[0169] (Feature 16) Feature 16. The apparatus of feature 15, wherein the user equipment is a RedCap UE.

[0170] (Feature 17) An apparatus (100), a communication processing unit (143) that receives capability information about a user device (200) from the user device; An information acquisition unit (141) that acquires delay information included in the capability information, the delay information indicating a bandwidth part (BWP) switching delay for a RedCap UE (reduced capability user equipment); Equipped with The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. Device.

[0171] (Feature 18) 18. The apparatus of feature 17, wherein the communication processor allocates radio resources to the user equipment based on the delay information.

[0172] (Feature 19) 19. The apparatus of feature 17 or 18, wherein the apparatus is a base station or a module for a base station.

[0173] (Feature 20) A method performed by a user equipment (200), comprising: obtaining capability information about the user equipment; transmitting said capability information to a base station (100); Including, The capability information includes delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE), The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. method.

[0174] (Feature 21) A method performed by a base station (100), comprising: receiving capability information from a user device (200) about the user device; Obtaining delay information included in the capability information, the delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE); Including, The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. method.

[0175] (Feature 22) Obtaining capability information about the user equipment (200); transmitting said capability information to a base station (100); A program that causes a computer to execute the The capability information includes delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE), The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. program.

[0176] (Feature 23) receiving capability information from a user device (200) about the user device; Obtaining delay information included in the capability information, the delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE); A program that causes a computer to execute the The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. program.

[0177] (Feature 24) Obtaining capability information about the user equipment (200); transmitting said capability information to a base station (100); A non-transitory computer-readable recording medium on which a program for causing a computer to execute the above is recorded, The capability information includes delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE), The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. A non-transitory tangible recording medium that can be read by a computer.

[0178] (Feature 25) receiving capability information from a user device (200) about the user device; Obtaining delay information included in the capability information, the delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE); A non-transitory computer-readable recording medium on which a program for causing a computer to execute the above is recorded, The BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay. A non-transitory tangible recording medium that can be read by a computer. [Explanation of symbols]

[0179] 1 System 50 Career 60 Bandwidth Portion (BWP) 70 frequency bands 100 base stations 141 Information Acquisition Department 143 Communication processing unit 200 User Equipment (UE) 231 Information Acquisition Department 233 Communication Processing Unit

Claims

1. An apparatus (200), comprising: an information acquisition unit (231) that acquires capability information about the device; a communication processing unit (233) that transmits the capability information to a base station (100); Equipped with The capability information includes delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE), the BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay; Device.

2. the BWP switching delay is another type of BWP switching delay that is longer than the Type 1 BWP switching delay and the Type 2 BWP switching delay; the delay information indicates the other type of BWP switching delay as one type of BWP switching delay selected from three or more types of BWP switching delays including the type 1 BWP switching delay, the type 2 BWP switching delay, and the other type of BWP switching delay; 10. The apparatus of claim 1.

3. The apparatus of claim 2 , wherein the other type of BWP switching delay is a Type 3 BWP switching delay.

4. The device according to claim 2 or 3, wherein the delay information is bwp-SwitchingDelay.

5. 2. The apparatus of claim 1, wherein the delay information is information separate from other delay information indicating one type of BWP switching delay selected from two or more types of BWP switching delays, including the type 1 BWP switching delay and the type 2 BWP switching delay.

6. The apparatus of claim 5 , wherein the capability information does not include the other delay information.

7. the capability information further includes the other delay information; The delay information is information that takes priority over the other delay information.

6. The apparatus of claim 5.

8. the delay information indicates the BWP switching delay as one BWP switching delay selected from a plurality of types of BWP switching delays for a RedCap UE; each of the plurality of types of BWP switching delays is longer than the type 1 BWP switching delay and the type 2 BWP switching delay; The device according to any one of claims 5 to 7.

9. The device according to any one of claims 5 to 7, wherein the other delay information is bwp-SwitchingDelay.

10. The device according to any one of claims 1 to 3 and 5 to 7, wherein the BWP switching delay is defined according to a slot length.

11. The type 1 BWP switching delay and the type 2 BWP switching delay are determined according to a slot length; The Type 1 BWP switching delay is 1 slot for a 1 ms slot length; The Type 2 BWP switching delay is 3 slots for a 1 ms slot length. The device according to any one of claims 1 to 3 and 5 to 7.

12. The device according to any one of claims 1 to 3 and 5 to 7, wherein the communication processing unit completes switching of the BWP and switching of the frequency band within the BWP within the BWP switching delay.

13. The apparatus of any one of claims 1 to 3 and 5 to 7, wherein the RedCap UE is a second type RedCap UE having a further reduced capability than the first type RedCap UE having a maximum bandwidth of 20 MHz for a frequency range of 450 MHz to 6000 MHz.

14. An apparatus (100), comprising: a communication processing unit (143) that receives capability information about a user device (200) from the user device; An information acquisition unit (141) for acquiring delay information included in the capability information, the delay information indicating a bandwidth part (BWP) switching delay for a RedCap UE (reduced capability user equipment); Equipped with the BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay; Device.

15. A method performed by a user equipment (200), comprising: obtaining capability information about the user equipment; transmitting said capability information to a base station (100); Including, The capability information includes delay information indicating a bandwidth part (BWP) switching delay for a reduced capability user equipment (RedCap UE), the BWP switching delay is longer than a Type 1 BWP switching delay and a Type 2 BWP switching delay; method.

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