Apparatus and method

Abstract

A device (200) according to one embodiment of the present disclosure comprises a communication processing unit (233) for receiving a message including configuration information for determining whether to use a buffer status report that includes at least one first field and at least one changed second field, and an information acquiring unit (231) for acquiring the configuration information included in the message, wherein: the buffer status report is used to provide information relating to an uplink data volume; the at least one first field indicates at least one logical channel group of which a buffer status is to be reported; and the at least one changed second field corresponds to the at least one logical channel group and relates to the uplink data volume.

Description

Cross-reference to Related Applications 【0001】 This application is based on Japanese Patent Application No. 2022-127462 filed on August 9, 2022, the contents of which are incorporated herein by reference. 【Technical Field】 【0002】 This disclosure relates to an apparatus and a method. 【Background Art】 【0003】 In 3GPP (3rd Generation Partnership Project) (registered trademark), mobile communication technologies have been proposed and defined in technical specifications (TS). In particular, currently, 5G (5th Generation) technologies have been proposed and defined in TS. 【0004】 In the above mobile communication system, a base station allocates communication resources for uplink (UL) transmission to a user equipment (UE). As described in Non-Patent Document 1, the user equipment transmits a scheduling request (SR) to the base station to request communication resource allocation for the UL transmission. The user equipment transmits UL data to the base station using the allocated communication resources. 【0005】 Also, as described in Non-Patent Document 1, the UE transmits a buffer status report (BSR) to the base station to provide information about the UL data volume. In the BSR, the range of the buffer size of the UL data is indicated. Therefore, the base station can allocate communication resources according to the range of the buffer size of the UL data indicated by the BSR. Note that since the BSR indicates the range of the buffer size, there is a quantization error. Also, as described in Non-Patent Document 2, the parameters of the SR and the parameters of the BSR are set in the radio resource control (RRC) layer. 【0006】 Furthermore, as described in Non-Patent Documents 3-5, it has recently been proposed to apply the above-mentioned mobile communication system to XR (extended reality) services. However, XR service data is characterized by its large volume and high variability. Therefore, quantization errors in the BSR waste communication resources and reduce scheduling efficiency. As a countermeasure, for example, Non-Patent Document 3 proposes determining a precise buffer size through the BSR. Also, XR services may have delay requirements (e.g., packet delay budget: PDB). As a countermeasure, for example, Non-Patent Document 4 proposes satisfying the PDB by including delay information in the BSR and performing scheduling that takes delay into account. [Prior art documents] [Non-patent literature] 【0007】 [Non-Patent Document 1] 3GPP TS 38.321 V17.0.0 (2022-03), “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Medium Access Control (MAC) protocol specification (Release 17)” [Non-Patent Document 2] 3GPP TS 38.331 V17.1.0 (2022-06), “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; NR; Radio Resource Control (RRC) protocol specification (Release 17)” [Non-Patent Document 3] 3GPP TSG RAN WG1 #109-e, e-Meeting, May 9th - 20th, 2022, R1-2203607, “Discussion on XR specific capacity enhancements techniques” [Non-Patent Document 4] 3GPP TSG-RAN WG1 Meeting #109-e, Online, May 9th - 20th, 2022, R1-2203639, “Discussion on capacity enhancements for XR” [Non-Patent Document 5] 3GPP TSG RAN WG1 #109-e, e-Meeting, May 9th - 20th, 2022, R1-2203928, “Considerations on XR Capacity Improvements” [Overview of the Initiative] 【0008】 As a result of the inventor's detailed examination, the following problem was identified: While non-patent literature has proposed concepts for scheduling UL data using BSR, no specific methods have been proposed. 【0009】 The purpose of this disclosure is to provide an apparatus and method capable of improving the efficiency of scheduling UL data using BSR. 【0010】 An apparatus (200) according to one aspect of the present disclosure includes a communication processing unit (233) that receives a message containing configuration information for determining whether to use a buffer status report having at least one first field and at least one modified second field, and an information acquisition unit (231) that acquires the configuration information contained in the message, wherein the buffer status report is used to provide information about uplink data volume, the at least one first field indicates at least one logical channel group for which the buffer status is reported, and the at least one modified second field corresponds to the at least one logical channel group and relates to uplink data volume. 【0011】 An apparatus (100) according to one aspect of the present disclosure includes an information acquisition unit (141) that acquires configuration information for determining whether to use a buffer status report having at least one first field and at least one modified second field, and a communication processing unit (143) that transmits a message having the configuration information, wherein the buffer status report is used to provide information about the amount of uplink data, the at least one first field indicates at least one logical channel group for which the buffer status is reported, and the at least one modified second field corresponds to the at least one logical channel group and relates to the amount of uplink data. 【0012】 A method performed by an apparatus (200) according to one aspect of the present disclosure includes receiving a message containing configuration information for determining whether to use a buffer status report comprising at least one first field and at least one modified second field, and obtaining the configuration information contained in the message, wherein the buffer status report is used to provide information about uplink data volume, the at least one first field indicating at least one logical channel group for which buffer status is reported, and the at least one modified second field corresponding to the at least one logical channel group and relating to uplink data volume. 【0013】 A method performed by an apparatus (100) according to one aspect of the present disclosure includes obtaining configuration information for determining whether to use a buffer status report having at least one first field and at least one modified second field, and transmitting a message having the configuration information, wherein the buffer status report is used to provide information about uplink data volume, the at least one first field indicating at least one logical channel group for which the buffer status is reported, and the at least one modified second field corresponding to the at least one logical channel group and relating to uplink data volume. 【0014】 This disclosure makes it possible to improve the efficiency of scheduling UL data using BSR. However, other effects may be achieved by this disclosure, either in lieu of or in conjunction with this effect. [Brief explanation of the drawing] 【0015】 [Figure 1] This is an explanatory diagram showing an example of UL data transmission. [Figure 2] This is a diagram showing Short BSR. [Figure 3] This figure shows a table of buffer sizes. [Figure 4] A diagram showing a Long BSR. [Figure 5] It is an explanatory diagram showing an example of a schematic configuration of a system according to an embodiment of the present disclosure. [Figure 6] It is a block diagram showing an example of a schematic functional configuration of a base station according to an embodiment of the present disclosure. [Figure 7] It is a block diagram showing an example of a schematic hardware configuration of a base station according to an embodiment of the present disclosure. [Figure 8] It is a block diagram showing an example of a schematic functional configuration of a user equipment according to an embodiment of the present disclosure. [Figure 9] It is a block diagram showing an example of a schematic hardware configuration of a user equipment according to an embodiment of the present disclosure. [Figure 10] It is a diagram showing an example of a BSR according to the first embodiment of the present disclosure. [Figure 11] It is a diagram showing an example of setting information for determining whether to use the BSR according to the first embodiment of the present disclosure. [Figure 12] It is a diagram for explaining an example of the above setting information according to the first embodiment of the present disclosure. [Figure 13] It is a sequence diagram for explaining an example of a schematic flow of processing according to the first embodiment of the present disclosure. [Figure 14] It is a diagram showing an example of the above setting information according to the first modification example 1 of the first embodiment of the present disclosure. [Figure 15] It is a diagram for explaining an example of the above setting information according to the first modification example 1 of the first embodiment of the present disclosure. [Figure 16] It is a diagram showing an example of the above setting information according to the first modification example 2 of the first embodiment of the present disclosure. [Figure 17] It is a diagram for explaining an example of the above setting information according to the first modification example 2 of the first embodiment of the present disclosure. [Figure 18] It is a diagram showing an example of the above setting information according to the first modification example 3 of the first embodiment of the present disclosure. [Figure 19]This figure illustrates an example of the above-mentioned setting information relating to the first modified example 3 of the first embodiment of the present disclosure. [Figure 20] This figure shows an example of setting information that includes the setting information described above, relating to a second modification of the first embodiment of the present disclosure. [Figure 21A] This figure shows an example of a BSR according to the second embodiment of this disclosure. [Figure 21B] This figure shows another example of a BSR according to the second embodiment of this disclosure. [Figure 22] This figure shows an example of configuration information for determining whether to use the BSR according to the second embodiment of this disclosure. [Figure 23] This figure illustrates an example of the above-mentioned configuration information according to a second embodiment of the present disclosure. [Figure 24] This figure shows an example of a BSR relating to a fourth modification of the second embodiment of the present disclosure. [Modes for carrying out the invention] 【0016】 Embodiments of this disclosure will be described in detail below with reference to the attached drawings. In this specification and in the drawings, elements that can be similarly described are denoted by the same reference numerals, and redundant explanations can be omitted. 【0017】 The explanation will proceed in the following order. 1. Related technologies 2. System Configuration 3. Base station configuration 4. User Equipment Configuration 5. First Embodiment 5-1. Example of Operation 5-2. Variations 6. Second Embodiment 6-1. Example of Operation 6-2. Variations 【0018】 <1. Related Technologies> As technologies related to embodiments of this disclosure, scheduling requests (SRs) and buffer status reports (BSRs) are described. 【0019】 (1) Scheduling Request (SR) SR is used by the UE to request the base station to allocate communication resources for a new UL transmission. For example, SR may be used to request uplink-shared channel (UL-SCH) resources for an initial transmission, where UL-SCH may be mapped to a physical uplink shared channel (PUSCH). In this embodiment, UL-SCH data is also referred to as UL data. As communication resources for SR, a set of multiple bandwidth parts (BWPs) and / or physical uplink control channel (PUCCH) resources across the cell are allocated. For each logical channel, up to one PUCCH resource is allocated for each BWP for the SR. For example, in each of one or more cells (also called serving cells), one or more downlink BWPs and / or one or more uplink BWPs may be configured. For example, a set of PUCCH resources may be configured for each of one or more uplink BWPs. 【0020】 Referring to Figure 1, an example of UL transmission using SR is described. When UL data arrives, the UE triggers an SR. The SR is transmitted to the base station using PUSCH. Upon receiving the SR, the base station allocates resources to the UE for UL data transmission. The UL resource allocation is transmitted to the UE using the physical downlink control channel (PDCCH). Upon receiving the UL resource allocation, the UE transmits the UL data to the base station using the allocated PUSCH resources. A BSR may also be transmitted along with the UL data. In this embodiment, the UL resource allocation includes the allocation of UL-SCH and / or the allocation of PUSCH resources. Furthermore, the allocation of PUSCH resources includes frequency domain resource assignment and / or time domain resource assignment of PUSCH. For example, the base station may transmit downlink control information (DCI) used for scheduling PUSCH via PDCCH. That is, the DCI may include information (one or more fields) for allocating PUSCH resources. 【0021】 SR parameters are configured using RRC configuration information, namely SchedulingRequestConfig and / or SchedulingRequestResourceConfig. For example, SR parameters are used to configure SR transmission and / or SR resources, and are also called SR settings. SR parameters may include SchedulingRequestConfig and / or SchedulingRequestResourceConfig. SR parameters may also include schedulingRequestID, sr-ProhibitTimer, sr-TransMax, periodicityAndOffset, phy-PriorityIndex, and / or resource. Each SR setting corresponds to one or more logical channels. For example, each SR setting may correspond to one or more logical channels (and / or BFR (beam failure recovery)) via schedulingRequestID. schedulingRequestID may be used to identify the SR instance at the MAC layer. sr-ProhibitTimer may be used to set the timer for SR transmission in PUCCH. sr-TransMax may be used to set the maximum number of SR transmissions. periodicityAndOffset may be used to set the period and offset of SRs. phy-PriorityIndex may be used to set the priority of SR resources in PHY layer prioritization or multiplexing. The parameter “resource” may be used to set the ID (identifier) ​​of the PUCCH resource used for SR transmission. For example, a PUCCH resource corresponding to the ID of the PUCCH resource included in the SR parameters may be set for SR transmission based on the parameters of that SR. The PUCCH resource may be set in PUCCH format 0 or PUCCH format 1, which contains information used to set the PUCCH resource. 【0022】 Here, the RRC configuration information may include information transmitted and / or received at the RRC layer between the base station and the UE. That is, the base station may send an RRC message containing the SR configuration to the UE. The UE may also receive an RRC message containing the SR configuration and transmit an SR based on that SR configuration. The UE may also receive an RRC message containing the SR configuration and determine the PUCCH resources to be used for transmitting the SR based on that SR configuration. For example, the RRC message may include an RRCreconfiguration message. 【0023】 (2) Buffer Status Report (BSR) The BSR procedure (also called the buffer status reporting procedure) is used to provide the base station with information about the amount (volume) of UL data at the UE. In other words, the BSR is used in the procedure (buffer status reporting) to provide the base station with information about the amount of UL data of the MAC entity. The BSR is transmitted using the MAC CE (Control Element). That is, operations related to the BSR may be executed and / or processed at the MAC layer (e.g., MAC entity) at the UE. Operations related to the BSR may also be executed and / or processed at the MAC layer (e.g., MAC entity) at the base station. In this embodiment, the upper layer includes layers higher than the MAC layer. For example, the upper layer may include the RRC layer. 【0024】 Parameters related to BSR are set using RRC configuration information. BSR parameters include periodicBSR-Timer, retxBSR-Timer, logicalChannelSR-DelayTimerApplied, logicalChannelSR-DelayTimer, logicalChannelSR-Mask, and logicalChannelGroup. periodicBSR-Timer may be used to set a timer for the BSR period. retxBSR-Timer may be used to set a timer for BSR retransmission. logicalChannelSR-DelayTimerApplied may be used to set whether to apply a delay timer to SR transmissions for logical channels. logicalChannelSR-DelayTimer may be used to set a delay timer for SR transmissions for logical channels. logicalChannelSR-Mask may be used to set the control of SR triggers (i.e., whether to set SR masking) when configured grant is set. logicalChannelGroup may be used to set the ID of the logical channel group to which the logical channel belongs. The base station may send an RRC message containing BSR-related parameters to the UE. Furthermore, the UE may receive an RRC message containing parameters related to the BSR and perform a BSR report (i.e., transmission) based on those parameters. 【0025】 BSRs are reported for each logical channel group (LCG). Each logical channel is assigned to one of the LCGs by a logicalChannelGroup, which indicates the LCG's ID. 【0026】 A BSR may be triggered when any of the following occurs in an activated cell group. The following trigger mechanisms classify BSRs into Regular BSRs (corresponding to (A) and (C)), Periodic BSRs (corresponding to (D)), and Padding BSRs (corresponding to (B)). (A) UL data for logical channels belonging to any LCG becomes available in the MAC entity. (B) An UL resource is allocated, and the number of padding bits for that UL resource is greater than or equal to the size of the BSR MAC CE. The period indicated by (C)retxBSR-Timer has expired, and UL data is included in at least one of the logical channels belonging to any LCG. (D) The period indicated by the periodicBSR-Timer expires. 【0027】 Next, we will describe BSR MAC CE. BSR MAC CE may correspond to the MAC CE used for transmitting the BSR described above. For example, the format of BSR MAC CE (hereinafter also referred to as BSR format) may be defined as several types (e.g., Short BSR, Long BSR) and identified by a MAC subheader including LCID / eLCID. That is, LCID (Logical Channel Identifier) / eLCID (Extended LCID) may be used to identify the type of MAC CE that corresponds to it. In addition, LCID / eLCID may be defined for Downlink-Shared Channel (DL-SCH) and / or UL-SCH, respectively. Hereinafter, LCID / eLCID refers to LCID and / or eLCID. 【0028】 The format 20A of the Short BSR will be described with reference to Figures 2 and 3. The size of the Short BSR is fixed. As shown in Figure 2, the Short BSR has an LCG ID field and a Buffer Size field. The LCG ID field identifies the LCG ID that reports the buffer size. The size of the LCG ID field is 3 bits. The Buffer Size field identifies the total amount of data available in all logical channels belonging to the LCG indicated by the LCG ID. The size of the Buffer Size field is 5 bits. The Buffer Size field shows the index in table T1 corresponding to the buffer size for the 5-bit Buffer Size field shown in Figure 3. 【0029】 Refer to Figure 4 to describe the format 20B of the Long BSR. The size of the Long BSR is variable. As shown in Figure 4, the Long BSR has an LCGi field and a Buffer Size j field. LCGi is the LCG with the i-th ID, and the LCGi field indicates the existence of a Buffer Size field for the LCGi. The LCGi field is set to 1 if a buffer size is reported, and to 0 otherwise. Alternatively, the LCGi field may indicate whether the LCGi has available data. The Buffer Size j field identifies the total amount of data available across all logical channels belonging to the corresponding LCGi. The size of the Buffer Size j field is 8 bits. The Buffer Size j field indicates the index corresponding to the buffer size in the table for 8-bit Buffer Size fields (not shown). The Buffer Size j field is included in ascending order according to the LCGi. 【0030】 The BSR format is TS (TS 38.321 5.4.5 and 5 . Selected according to the method specified in 4.7). 【0031】 For example, in the case of Regular BSRs and Periodic BSRs, a Long BSR is reported if there are two or more LCGs with available data when the MAC PDU containing the BSR is built; otherwise, a Short BSR is reported. Furthermore, for MAC entities where logicalChannelGroup-IABExt is configured by a higher layer, an Extended Long BSR or Extended Short BSR may be reported. 【0032】 Furthermore, for example, in the case of Padding BSR, in addition to the BSR format described above, Short Truncated BSR, Long Truncated BSR, Extended Short Truncated BSR, and Extended Long Truncated BSR are reported depending on the conditions. 【0033】 Furthermore, for example, Pre-emptive BSR and Extended Pre-emptive BSR are used by IAB-MT (Mobile Termination). 【0034】 <2. System Configuration> Referring to Figure 5, an example of the configuration of System 1 according to an embodiment of this disclosure will be described. Referring to Figure 5, System 1 includes a base station 100 and a UE 200. 【0035】 For example, System 1 is a system compliant with 3GPP's TS (Time Station) standard. More specifically, for example, System 1 is a system compliant with 5G or NR (New Radio) TS standards. Of course, System 1 is not limited to this example. 【0036】 (1) Base station 100 Base station 100 is a node in the radio access network (RAN) and communicates with UEs (e.g., UE200) located within the coverage area 10 of base station 100. 【0037】 For example, base station 100 communicates with UE (e.g., UE200) using a RAN protocol stack. For example, this protocol stack includes RRC (radio resource control), SDAP (service data adaptation protocol), PDCP (packet data convergence protocol), RLC (radio link control), MAC (medium access control), and physical (PHY) layer protocols. Alternatively, the above protocol stack may include only some of these protocols, rather than all of them. 【0038】 For example, base station 100 is a gNB. A gNB is a node that provides NR user plane and control plane protocol terminations towards the UE and is connected to 5GC (5G Core Network) via an NG interface. Alternatively, base station 100 may be an en-gNB. An 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 EN-DC (E-UTRA-NR Dual Connectivity). 【0039】 The base station 100 may include multiple nodes. These multiple nodes may include a first node that hosts the higher layer included in the protocol stack and a second node that hosts the 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 the PHY layer. The first node may be a CU (central unit), and the second node may be a DU (distributed unit). The multiple nodes may also 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). 【0040】 Alternatively, base station 100 may be one of the above-mentioned multiple nodes, or it may be connected to other units among the above-mentioned multiple nodes. 【0041】 Base station 100 may be an IAB (integrated access and backhaul) donor or IAB node. 【0042】 (2) UE200 The UE200 communicates with the base station. For example, the UE200 communicates with the base station 100 when it is located within the coverage area 10 of the base station 100. 【0043】 For example, UE200 communicates with a base station (e.g., base station 100) using the protocol stack described above. 【0044】 Furthermore, the UE200 transmits SR and BSR to the base station as described in <1. Related Technologies>. The UE200 may also be a device that supports XR services (in other words, XR scenarios). 【0045】 <3. Base station configuration> An example of the configuration of a base station 100 according to an embodiment of this disclosure will be described with reference to Figures 6 and 7. 【0046】 (1) Functional configuration First, an example of the functional configuration of a base station 100 according to the embodiment of this disclosure will be described with reference to Figure 6. Referring to Figure 6, the base station 100 includes a wireless communication unit 110, a network communication unit 120, a storage unit 130, and a processing unit 140. 【0047】 The wireless communication unit 110 transmits and receives signals wirelessly. For example, the wireless communication unit 110 receives a signal from the UE and transmits a signal to the UE. 【0048】 The network communication unit 120 receives signals from the network and transmits signals to the network. 【0049】 The memory unit 130 stores various information for the base station 100. 【0050】 The processing unit 140 provides various functions of the base station 100. The processing unit 140 includes an information acquisition unit 141, a first communication processing unit 143, and a second communication processing unit 145. The processing unit 140 may also include other components besides these. That is, the processing unit 140 may perform operations other than those of these components. The specific operations of the information acquisition unit 141, the first communication processing unit 143, and the second communication processing unit 145 will be described in detail later. 【0051】 For example, the processing unit 140 (first communication processing unit 143) communicates with the UE (e.g., UE200) via the wireless communication unit 110. For example, the processing unit 140 (second communication processing unit 145) communicates with other nodes (e.g., network nodes in the core network or other base stations) via the network communication unit 120. 【0052】 (2) Hardware configuration Next, an example of the hardware configuration of a base station 100 according to an embodiment of the present disclosure will be described with reference to Figure 7. Referring to Figure 7, the base station 100 comprises an antenna 181, an RF (radio frequency) circuit 183, a network interface 185, a processor 187, a memory 189, and a storage 191. 【0053】 Antenna 181 converts a signal 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 it may be a single antenna for both transmitting and receiving. Antenna 181 may be a directional antenna and may include multiple antenna elements. 【0054】 The RF circuit 183 performs analog processing on the signals transmitted and received via the antenna 181. The RF circuit 183 may include a high-frequency filter, amplifier, modulator, and low-pass filter, etc. 【0055】 The network interface 185 is, for example, a network adapter that sends signals to and receives signals from the network. 【0056】 Processor 187 performs digital processing of signals transmitted and received via antenna 181 and RF circuit 183. This digital processing includes processing of the RAN protocol stack. Processor 187 also processes signals transmitted and received via network interface 185. Processor 187 may include multiple processors or may be a single processor. The multiple processors may include a baseband processor that performs the above digital processing and one or more processors that perform other processing. 【0057】 Memory 189 stores programs executed by processor 187, parameters related to those 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), RAM (random access memory), and flash memory. All or part of memory 189 may be contained within processor 187. 【0058】 The storage device 191 stores various types of information. The storage device 191 may include at least one of an SSD (solid state drive) and an HDD (hard disk drive). 【0059】 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 storage unit 130 may be implemented by a storage device 191. The processing unit 140 may be implemented by a processor 187 and a memory 189. 【0060】 Part or all of the processing unit 140 may be virtualized. In other words, part or all of the processing unit 140 may be implemented as a virtual machine. In this case, part or all of the processing unit 140 may operate as a virtual machine on a physical machine (i.e., hardware) including a processor and memory, and a hypervisor. 【0061】 Considering the above hardware configuration, the base station 100 may include a memory for storing a program (i.e., memory 189) and one or more processors capable of executing the program (i.e., processor 187), and the one or more processors may execute the program to perform the operation of the processing unit 140. The program may also be a program that causes the processor to perform the operation of the processing unit 140. 【0062】 <4. User Equipment Configuration> An example of the configuration of the UE200 according to the embodiment of this disclosure will be described with reference to Figures 8 and 9. 【0063】 (1) Functional configuration First, an example of the functional configuration of the UE200 according to the embodiment of this disclosure will be described with reference to Figure 8. Referring to Figure 8, the UE200 comprises a wireless communication unit 210, a storage unit 220, and a processing unit 230. 【0064】 The wireless communication unit 210 transmits and receives signals wirelessly. For example, the wireless communication unit 210 receives a signal from a base station and transmits a signal to the base station. For example, the wireless communication unit 210 receives a signal from another UE and transmits a signal to another UE. 【0065】 The memory unit 220 stores various information for the UE200. 【0066】 The processing unit 230 provides various functions of the UE200. The processing unit 230 includes an information acquisition unit 231 and a communication processing unit 233. The processing unit 230 may also include other components besides these. That is, the processing unit 230 can 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. 【0067】 For example, the processing unit 230 (communication processing unit 233) communicates with a base station (e.g., base station 100) or another UE via the wireless communication unit 210. 【0068】 (2) Hardware configuration Next, with reference to Figure 9, an example of the hardware configuration of the UE200 according to the embodiment of this disclosure will be described. Referring to Figure 9, the UE200 comprises an antenna 281, an RF circuit 283, a processor 285, a memory 287, and a storage 289. 【0069】 Antenna 281 converts a signal 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 it may be a single antenna for both transmitting and receiving. Antenna 281 may be a directional antenna and may include multiple antenna elements. 【0070】 The RF circuit 283 performs analog processing on the signals transmitted and received via the antenna 281. The RF circuit 283 may include a high-frequency filter, amplifier, modulator, and low-pass filter, etc. 【0071】 The processor 285 performs digital processing of signals transmitted and received via the antenna 281 and the RF circuit 283. This 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. 【0072】 Memory 287 stores programs executed by the processor 285, parameters related to those programs, and various other information. Memory 287 may include at least one of ROM, EPROM, EEPROM, RAM, and flash memory. All or part of memory 287 may be contained within the processor 285. 【0073】 Storage 289 stores various types of information. Storage 289 may include at least one of an SSD and an HDD. 【0074】 The wireless communication unit 210 may be implemented by an antenna 281 and an RF circuit 283. The storage unit 220 may be implemented by a storage device 289. The processing unit 230 may be implemented by a processor 285 and a memory 287. 【0075】 The processing unit 230 may be implemented by a System on Chip (SoC) including a processor 285 and memory 287. The SoC may also include an RF circuit 283, and the wireless communication unit 210 may also be implemented by the SoC. 【0076】 Considering the above hardware configuration, the UE200 may include a memory for storing a program (i.e., memory 287) and one or more processors capable of executing the program (i.e., processor 285), and these one or more processors may execute the program to perform the operation of the processing unit 230. The program may also be a program that causes the processor to perform the operation of the processing unit 230. 【0077】 <5. First Embodiment> In embodiments of the present disclosure, configuration information is transmitted from the base station to the UE to determine whether to use a BSR (hereinafter also referred to as enhanced-BSR) that includes a first field and a modified second field. In the first embodiment of the present disclosure, configuration information is transmitted from the base station 100 to the UE 200 to determine whether to use an enhanced-BSR (hereinafter also referred to as BS (Buffer Size) enhanced BSR) that includes an extended buffer size field as the modified second field. 【0078】 <5-1. Example of Operation> An example of the operation of the base station 100 and UE200 according to the first embodiment of this disclosure will be described with reference to Figures 10 to 13. 【0079】 (1) Format of BS Extended BSR The BS extended BSR according to this embodiment includes a first field and a modified second field, the first field may indicate a logical channel group (LCG) to which the buffer status is reported. The second field corresponds to the logical channel group and relates to the amount of uplink data. The modified second field may be a field in which the size of the second field has been increased (hereinafter also referred to as the extended second field). In other words, the extended second field may be larger in size than the second field before the extension (i.e., it may have a longer data length or a larger number of bits). For example, the UE200 may calculate the amount of data (volume) and determine the amount of uplink data available for the logical channel. Furthermore, as will be described later, the UE200 may determine the Buffer Size level based on the amount of uplink data and set an index corresponding to the determined Buffer Size level in the second field. 【0080】 Specifically, the extended second field is the Buffer Size field (hereinafter also referred to as the Extended Buffer Size field) which indicates information used to show the total amount of data in the logical channels of the corresponding logical channel group. The Extended Buffer Size field of the BS Extended BSR is longer than the Buffer Size field of the Legacy BSR (hereinafter also referred to as the Legacy Buffer Size field). The Legacy BSR is the BSR from which the enhanced-BSR was modified. For example, the Legacy BSR may be a BSR classified as a Regular BSR, Periodic BSR, or Padding BSR as described above. That is, the Legacy BSR may be a Short BSR, Long BSR, Extended Short BSR, Extended Long BSR, Short Truncated BSR, Long Truncated BSR, Extended Short Truncated BSR, Extended Long Truncated BSR, Pre-emptive BSR, or Extended Pre-emptive BSR. Furthermore, for example, the LCID / eLCID value for UL-SCH may specify a code point (or index) corresponding to each of the legacy BSRs. That is, the LCID / eLCID value for UL-SCH may specify a code point (or index) corresponding to each of the Short BSR, Long BSR, Extended Short BSR, Extended Long BSR, Short Truncated BSR, Long Truncated BSR, Extended Short Truncated BSR, Extended Long Truncated BSR, Pre-emptive BSR, and / or Extended Pre-emptive BSRs. For example, UE200 may transmit any of the legacy BSRs identified by the LCID / eLCID value based on settings from base station 100 and / or conditions. 【0081】 Referring to Figure 10, the format of the BS extended BSR according to this embodiment will be described in detail. Figure 10 shows an example of the MAC CE format of a BS extended BSR in which the Buffer Size field of a legacy Long BSR has been extended. Note that the BS extended BSR is not limited to a legacy Long BSR, but may be a BSR in which the Buffer Size field of a legacy BSR of another format has been extended. 【0082】 For example, the BS extended BSR includes an LCGi field as the first field and an extended Buffer Size j field as the extended second field, as shown in format 21 of Figure 10. The LCGi field indicates the presence of the extended Buffer Size j field for LCGi. 【0083】 The Extended Buffer Size j field is used to identify the total amount of data available across all logical channels belonging to the corresponding LCGi. A single Extended Buffer Size j field can be, for example, 16 bits (or 8 bits), which is longer than the Legacy Buffer Size j field (8 bits, or 5 bits). The Legacy Buffer Size j field is the Buffer Size field from which the Extended Buffer Size j field was modified. Note that the size of the Extended Buffer Size j field is not limited to this and can be any other size longer than the Legacy Buffer Size j field (e.g., 24 bits). Furthermore, the size of the Extended Buffer Size j field may vary depending on the corresponding LCGi. Here, 8 bits is also called 1 octet, and 16 bits is also called 2 octets. 【0084】 The Extended Buffer Size j field indicates the index corresponding to the Buffer Size (e.g., Buffer Size level, Buffer Size value, or Buffer Size range) in the table for the 16-bit Buffer Size field (not shown in the diagram). The Extended Buffer Size j field is included in ascending order according to LCGi (e.g., according to the value of i in LCGi). 【0085】 BS Extended BSRs are distinguished from BSRs of other formats. For example, an LCID / eLCID is defined to indicate a BS Extended BSR. For example, the code point (or index) corresponding to the BS Extended BSR may be defined as the value of the LCID / eLCID for UL-SCH. This makes the BS Extended BSR transmittable as a MAC CE. The MAC CE of a BS Extended BSR may be transmitted included in a MAC PDU (protocol data unit). For example, a MAC PDU may contain one or more MAC subPDUs, each containing a MAC subheader and a MAC CE. Here, the MAC subheader may contain an LCID / eLCID. That is, a MAC subheader containing an LCID / eLCID indicating a BS Extended BSR and the MAC CE of the BS Extended BSR are included in a MAC subPDU, and the MAC PDU containing the MAC subPDU is transmitted. 【0086】 (2) BS Extended BSR Configuration Information Configuration information (hereinafter also referred to as BS extended BSR configuration information) for determining whether to use the BS extended BSR according to this embodiment is defined. The BS extended BSR configuration information is included in the logical channel configuration information. As a result, the BS extended BSR is configured for each logical channel. The BS extended BSR configuration information will be described in detail with reference to Figures 11 and 12. 【0087】 Specifically, the BS extended BSR configuration information is included in LogicalChannelConfig. That is, the configuration information for the logical channel may correspond to LogicalChannelConfig. For example, LogicalChannelConfig may be used to set the parameters of a logical channel. LogicalChannelConfig may also include parameters related to the BSR. For example, one or more parameters included in LogicalChannelConfig may be used to identify a single logical channel. For example, LogicalChannelConfig may include a parameter (logicalChannelGroup) that indicates the index of the logical channel group to which the single logical channel belongs. That is, the logical channel group to which the single logical channel belongs may be identified based on a parameter that indicates the index of the logical channel group. For example, base station 100 may transmit LogicalChannelConfig containing one or more parameters for the single logical channel to UE200. Here, base station 100 The UE200 may send an RRC message containing the LogicalChannelConfig to the UE200. The UE200 may also identify the single logical channel based on one or more parameters included in the LogicalChannelConfig. For example, the UE200 may identify the logical channel group to which the single logical channel belongs based on a parameter indicating the index of the logical channel group included in the LogicalChannelConfig. Here, as described above, the UE200 may send a BSR for the logical channel group to which one or more logical channels belong. As a specific example, as shown in information 31 of Figure 11, BSR-BSExtApplied may be included as a parameter of the LogicalChannelConfig as BS extended BSR setting information. 【0088】 Furthermore, the BS Extended BSR configuration information is a flag. For example, as shown in Table 41 of Figure 12, if BSR-BSExtApplied exists, it indicates that the UE200 is configured to report the BS Extended BSR. Conversely, if BSR-BSExtApplied does not exist, it indicates that the UE200 is not configured to report the BS Extended BSR, i.e., it is configured to report the Legacy BSR. Note that the BS Extended BSR configuration information is not limited to a flag that indicates whether to use the BS Extended BSR based on whether it exists or not, but may also be a flag that indicates whether to use the BS Extended BSR based on its value. For example, if the value of the BS Extended BSR configuration information is 0, it may indicate that the Legacy BSR will be used, and if the value is 1, it may indicate that the BS Extended BSR will be used. Here, the existence of BSR-BSExtApplied may correspond to the existence of BSR-BSExtApplied within LogicalChannelConfig. That is, the existence of BSR-BSExtApplied may correspond to the existence of BSR-BSExtApplied within LogicalChannelConfig. Furthermore, the case where BSR-BSExtApplied does not exist may also correspond to the case where BSR-BSExtApplied does not exist in LogicalChannelConfig. In other words, the case where BSR-BSExtApplied does not exist may also correspond to the case where BSR-BSExtApplied is not included in LogicalChannelConfig. The following mainly describes the cases where BSR-BSExtApplied exists or where BSR-BSExtApplied does not exist, but the case where BSR-BSExtApplied exists may be replaced with the case where the value of the BS extended BSR setting information is 1. Also, the case where BSR-BSExtApplied does not exist may be replaced with the case where the value of the BS extended BSR setting information is 0. Furthermore, the case where BSR-BSExtApplied exists will also be described as the case where BSR-BSExtApplied is configured.Furthermore, the case where BSR-BSExtApplied does not exist will also be described as the case where BSR-BSExtApplied is not set. 【0089】 (3) Messages containing configuration information Configuration information for determining whether to use the BS extended BSR according to this embodiment is included in the message and transmitted. The message may be an RRC message. 【0090】 For example, BS extended BSR configuration information is transmitted in an RRC message containing LogicalChannelConfig. This RRC message may be, for example, RRCReconfiguration, RRCResume, or RRCSetup. Alternatively, a different RRC message may be used. Here, base station 100 may transmit LogicalChannelConfig containing BS extended BSR configuration information to UE200. For example, base station 100 may transmit an RRC message containing LogicalChannelConfig to UE200. Furthermore, UE200 may determine BSR-related operations based on the BS extended BSR configuration information. For example, UE200 may identify the logical channel group to which the logical channel belongs based on the BS extended BSR configuration information and transmit a BSR for the logical channel group. 【0091】 (4) Operation of UE200 based on configuration information In this embodiment, UE200 receives configuration information to determine whether to use the BS extended BSR according to this embodiment. UE200 retrieves the configuration information from the message containing the received configuration information. Based on the retrieved configuration information, UE200 determines which BSR to use. 【0092】 Specifically, the UE200 determines whether to use BS Extended BSR based on the BS Extended BSR configuration information obtained from the received RRC message. For example, the UE200 determines whether to use BS Extended BSR for each logical channel based on the BS Extended BSR configuration information included in the logical channel configuration information. The UE200 uses BS Extended BSR when reporting the buffer status for the LCG to which a logical channel to which it has been determined to use BS Extended BSR belongs. 【0093】 For example, if the LogicalChannelConfig included in the received RRC message contains a BSR-BSExtApplied as shown in Figure 11, the UE200 will use the BS Extended BSR as the BSR for the LCG containing the logical channel to which the LogicalChannelConfig is set. 【0094】 (5) Processing flow An example of the process according to this embodiment will be described with reference to Figure 13. 【0095】 The base station 100 sets configuration information (i.e., BS-extended BSR configuration information in this embodiment) in the RRC message to determine whether to use enhanced-BSR (step S310). For example, the base station 100 obtains BSR-BSExtApplied as shown in Figure 11 and sets BSR-BSExtApplied in LogicalChannelConfig. 【0096】 The base station 100 sends an RRC message containing BS extended BSR configuration information to the UE200 (step S320). For example, the base station 100 sends an RRC message (e.g., RRCReconfiguration, RRCResume, or RRCSetup) containing LogicalChannelConfig with BSR-BSExtApplied set to UE200. 【0097】 When UE200 receives an RRC message containing BS extended BSR configuration information, it sends a response RRC message to base station 100 (step S330). For example, when UE200 receives an RRC message containing LogicalChannelConfig with BSR-BSExtApplied set, it sends a response RRC message (e.g., RRCReconfigurationComplete, RRCResumeComplete, or RRCSetupComplete) to base station 100. 【0098】 The UE200 decides to use an enhanced-BSR based on the received configuration information (step S340). For example, when a BSR is triggered, the UE200 uses the enhanced BS BSR if the LogicalChannelConfig for any of the logical channels belonging to the LCG that report the buffer status in that BSR includes BSR-BSExtApplied. Otherwise, the UE200 uses the legacy BSR, i.e., a BSR with no enhanced Buffer Size field. That is, the UE200 may report an enhanced BS BSR (i.e., an enhanced-BSR MAC CE) based on the fact that BSR-BSExtApplied is set for at least one of the logical channels belonging to the LCG for the reported BSR. Alternatively, the UE200 may report a legacy BSR based on the fact that BSR-BSExtApplied is not set for any of the logical channels belonging to the LCG for the reported BSR. In other words, UE200 may decide whether to report a BS-enhanced BSR (e.g., enhanced-BSR MAC CE) based on whether BSR-BSExtApplied is set (e.g., whether BSR-BSExtApplied is set by the upper layer). Alternatively, UE200 may decide whether to send a BS-enhanced BSR (e.g., enhanced-BSR MAC CE) based on whether BSR-BSExtApplied is included in LogicalChannelConfig. 【0099】 Here, the BS extended BSR format may be used for Regular BSR, Periodic BSR, and / or Padding BSR. For example, for Regular BSR, Periodic BSR, and / or Padding BSR, UE200 may report a BS extended BSR based on the fact that BSR-BSExtApplied is set. For example, for Regular BSR, Periodic BSR, and / or Padding BSR, UE200 may report a BS extended BSR based on the fact that BSR-BSExtApplied is set and there are two or more LCGs with data available when the MAC PDU containing the BSR is built. Alternatively, for Regular BSR, Periodic BSR, and / or Padding BSR, UE200 may report a BS extended BSR based on the fact that BSR-BSExtApplied is set and there is one or more LCGs with data available when the MAC PDU containing the BSR is built. Furthermore, for Regular BSRs, Periodic BSRs, and / or Padding BSRs, UE200 may report a BS extended BSR based on the following: BSR-BSExtApplied is set, there are two or more (or one or more) LCGs with available data when the MAC PDU containing the BSR is built, and the ID of the largest LCG among the set LCGs is greater than 7. Alternatively, for Regular BSRs, Periodic BSRs, and / or Padding BSRs, UE200 may report a BS extended BSR based on the following: BSR-BSExtApplied is set, there are two or more (or one or more) LCGs with available data when the MAC PDU containing the BSR is built, and the ID of the largest LCG among the set LCGs is greater than 256. Here, UE200 may report a BS extended BSR for all LCGs with available data for transmission. 【0100】 Furthermore, for Regular BSRs, Periodic BSRs, and / or Padding BSRs, UE200 may report a legacy BSR based on the fact that BSR-BSExtApplied is not set. Also, for Regular BSRs, Periodic BSRs, and / or Padding BSRs, UE200 may report a legacy BSR based on the fact that BSR-BSExtApplied is set and there is one LCG with data available when the MAC PDU containing the BSR is built. Furthermore, for Regular BSRs, Periodic BSRs, and / or Padding BSRs, UE200 may report a legacy BSR based on the fact that BSR-BSExtApplied is set, there are two or more LCGs with data available when the MAC PDU containing the BSR is built, and the ID of the largest LCG among the set LCGs is 7 or less than 7. Furthermore, for Regular BSRs, Periodic BSRs, and / or Padding BSRs, UE200 may report a Legacy BSR based on the fact that BSR-BSExtApplied is set, there are two or more LCGs with available data when the MAC PDU containing the BSR is built, and the ID of the largest LCG among the set LCGs is 256 or less than 256. Here, UE200 may report a Legacy BSR for all LCGs with available data for transmission. As mentioned above, for example, a Legacy BSR may be a Short BSR, Long BSR, Extended Short BSR, Extended Long BSR, Short Truncated BSR, Long Truncated BSR, Extended Short Truncated BSR, Extended Long Truncated BSR, Pre-emptive BSR, or Extended Pre-emptive BSR. 【0101】 Here, the maximum number of LCGs that can be configured using logicalChannelGroup may be 8 (for example, 8 LCGs with IDs from 0 to 7). That is, the ID of an LCG configured using logicalChannelGroup may be any value from 0 to 7. Alternatively, the maximum number of LCGs that can be configured using logicalChannelGroup-IAB-Ext-r17 may be 256 (for example, 256 LCGs with IDs from 0 to 255). The UE200 may report legacy BSRs for LCGs corresponding to ID values ​​that can be configured using logicalChannelGroup and / or logicalChannelGroup-IAB-Ext-r17. 【0102】 Furthermore, for a Padding BSR, UE200 may report a BS extended BSR based on the fact that BSR-BSExtApplied is set and the number of padding bits is greater than the size of the legacy BSR (and / or the subheader of the legacy BSR). Alternatively, for a Padding BSR, UE200 may report a legacy BSR based on the fact that BSR-BSExtApplied is set and the number of padding bits is less than the size of the legacy BSR (and / or the subheader of the legacy BSR). Here, UE200 may report a BS extended BSR or a legacy BSR for all LCGs that have data available for transmission. Alternatively, UE200 may report a BS extended BSR or a legacy BSR for LCGs to which logical channels determined based on priority belong among the logical channels that have data available for transmission. 【0103】 UE200 transmits an enhanced-BSR MAC CE to base station 100 (step S350). For example, UE200 generates a BS enhanced BSR MAC CE by setting an index corresponding to the Buffer Size of the UL data in the enhanced Buffer Size field corresponding to the LCG, as shown in Figure 10. UE200 transmits the generated BS enhanced BSR MAC CE to base station 100. For example, UE200 may transmit an enhanced-BSR MAC CE by applying a logical channel prioritization (LCP) procedure. Here, the logical channel prioritization procedure may be a procedure applied when the initial transmission is performed. For example, in the logical channel prioritization procedure, logical channels (e.g., MAC CEs of logical channels) may be prioritized in the following order: In the following, logical channels with higher priority are listed first. - MAC CE for C-RNTI, or data from UL-CCCH - MAC CE for (Extended) BSR, with exception of BSR included for padding - MAC CE for (Extended) Pre-emptive BSR - data from any Logical Channel, except data from UL-CCCH - MAC CE for BSR included for padding For example, an enhanced-BSR MAC CE may have higher priority than a MAC CE for (Extended) BSR, with the exception of BSR included for padding. For example, an enhanced-BSR MAC CE may have lower priority than a MAC CE for C-RNTI, or data from UL-CCCH, and higher priority than a MAC CE for (Extended) BSR. Also, an enhanced-BSR MAC CE may have higher priority than a MAC CE for (Extended) Pre-emptive BSR. For example, an enhanced-BSR MAC CE may have lower priority than a MAC CE for (Extended) BSR, with the exception of BSR included for padding, and higher priority than a MAC CE for (Extended) Pre-emptive BSR. Also, an enhanced-BSR MAC CE may have higher priority than data from any Logical Channel, except data from UL-CCCH. For example, an enhanced-BSR MAC CE may have a lower priority than a MAC CE for (Extended) Pre-emptive BSR, but a higher priority than data from any Logical Channel, except data from UL-CCCH. Also, an enhanced-BSR MAC CE may have a higher priority than a MAC CE for BSR included for padding. For example, an enhanced-BSR MAC CE may have a lower priority than data from any Logical Channel, except data from UL-CCCH, but a higher priority than a MAC CE for BSR included for padding.For example, the UE200 may report enhanced-BSR MAC CE according to the priority in the logical channel prioritization (LCP) procedure. 【0104】 Thus, according to embodiments of the present disclosure, a message is sent and received containing configuration information for determining whether to use a BSR including at least one first field and at least one modified second field, the BSR being used to provide information about the amount of UL data, the at least one first field indicating at least one LCG on which the buffer status is reported, and the at least one modified second field corresponding to the at least one LCG and relating to the amount of UL data. 【0105】 This allows for an increase in the amount of information regarding the amount of UL data in the BSR compared to a BSR that includes the first and second fields (i.e., a legacy BSR). Therefore, it becomes possible to improve the efficiency of scheduling UL data using the BSR. In particular, it becomes possible to concretize a method for scheduling XR data using an XR-specific BSR, thereby improving the efficiency of scheduling XR data using an XR-specific BSR. 【0106】 Furthermore, the above configuration information is included in the logical channel configuration information. This allows the above configuration information to be set for each logical channel. In particular, since logical channels can be associated with XR traffic, the above configuration information can effectively be set for XR traffic. 【0107】 Furthermore, the above configuration information is a flag. This allows the above configuration information to be handled with a small amount of data. Therefore, the increase in communication resources required for signaling the above configuration information can be suppressed. 【0108】 Furthermore, the at least one modified second field described above is the second field with increased size. This allows for an increase in the amount of information related to the UL data volume while following the conventions of the second field. For example, it is possible to expand the range or granularity of the UL data volume that can be handled. That is, it becomes possible to raise the upper limit of the UL data volume or to subdivide the granularity. 【0109】 Furthermore, the at least one modified second field is a Buffer Size field that indicates information used to show the total amount of data for each logical channel of the corresponding at least one LCG. This expands the range or granularity of Buffer Size that can be handled in the Buffer Size field. As a result, quantization errors can be reduced for UL data (e.g., XR data) that is large in volume and fluctuates greatly. 【0110】 <5-2. Variant Example> Referring to Figures 14 to 20, the first to fourth modifications according to the first embodiment of this disclosure will be described. Two or more of these modifications may be combined. 【0111】 (1) First variation: Another example of BS extended BSR configuration information In the embodiments of this disclosure described above, the BS extended BSR setting information is a flag. However, the BS extended BSR setting information according to the embodiments of this disclosure is not limited to this example. 【0112】 As a first modification of this embodiment, the BS extended BSR setting information may be information relating to the length of at least one modified second field. Specifically, the BS extended BSR setting information is information indicating the length of a second field whose size has been increased. The BS extended BSR setting information relating to this modification will be described in detail with reference to Figures 14 and 15. 【0113】 For example, as shown in information 33 of Figure 14, BSR-BufferSizeFieldLength is included as a parameter of LogicalChannelConfig as BS Extended BSR configuration information. For example, as shown in table 43 of Figure 15, BSR-BufferSizeFieldLength indicates the length of the Buffer Size field. BSR-BufferSizeFieldLength indicates whether to use a BS Extended BSR depending on whether it is present or not. For example, if BSR-BufferSizeFieldLength is present, it indicates that the UE200 is configured to report a BS Extended BSR and indicates the length of the Extended Buffer Size field in that BS Extended BSR. Conversely, if BSR-BufferSizeFieldLength is not present, it indicates that the UE200 is not configured to report a BS Extended BSR, i.e., it is configured to report a Legacy BSR. 【0114】 Additionally, BSR-BufferSizeFieldLength may indicate information to show the length of the Buffer Size field. For example, BSR-BufferSizeFieldLength may indicate an index corresponding to the length of the Buffer Size field (e.g., the value or range of that length). 【0115】 Furthermore, as a second modification of this embodiment, the BS extended BSR setting information may be information for identifying an LCG that uses the BS extended BSR. That is, the BS extended BSR setting information may indicate the ID of the LCG. For example, the BS extended BSR setting information may indicate the ID of the LCG to which the logical channel belongs. For example, the UE200 may determine the ID of the LCG to which the logical channel belongs based on the ID of the LCG indicated by the BS extended BSR setting information. The BS extended BSR setting information related to this modification will be described in detail with reference to Figures 16 and 17. 【0116】 For example, as shown in information 35 of Figure 16, logicalChannelGroup-XR-Ext-r18 is included as a parameter of LogicalChannelConfig as BS extended BSR configuration information. For example, as shown in table 45 of Figure 17, logicalChannelGroup-XR-Ext-r18 may indicate an LCG ID. For example, logicalChannelGroup-XR-Ext-r18 may indicate the LCG ID to which the logical channel belongs, if it exists. Also, logicalChannelGroup-XR-Ext-r18 may indicate that UE200 is configured to report BS extended BSR for the LCG ID. Also, if logicalChannelGroup-XR-Ext-r18 does not exist, it may indicate that UE200 is not configured to report BS extended BSR, i.e., is configured to report legacy BSR. 【0117】 If logicalChannelGroup-XR-Ext-r18 is configured, other LCG ID settings may be ignored. In this case, for example, logicalChannelGroup and / or logicalChannelGroup-IAB-Ext-r17 as shown in Figure 16 may be ignored. That is, if logicalChannelGroup-XR-Ext-r18, which indicates an LCG ID, is included in the logical channel config, UE200 may ignore logicalChannelGroup and / or logicalChannelGroup-IAB-Ext-r17 included in that logical channel config. As mentioned above, logicalChannelGroup and / or logicalChannelGroup-IAB-Ext-r17 indicate an LCG ID. Here, the maximum number of LCGs that can be configured using logicalChannelGroup-XR-Ext-r18 may be 8 (for example, 8 LCGs with IDs from 0 to 7, or 8 LCGs with IDs from 8 to 15). In other words, the LCG ID set using logicalChannelGroup-XR-Ext-r18 may be any value from 0 to 7 (or any value from 8 to 15). For example, by setting the LCG ID set using logicalChannelGroup-XR-Ext-r18 to 8 to 15, it becomes possible to set an LCG ID different from the LCG ID set using logicalChannelGroup (i.e., 0 to 7). Also, the maximum number of LCGs that can be set using logicalChannelGroup-XR-Ext-r18 may be 16 (for example, 16 LCGs with IDs from 0 to 15, or 16 LCGs with IDs from 8 to 23). In other words, the LCG ID set using logicalChannelGroup-XR-Ext-r18 may be any value from 0 to 15 (or any value from 8 to 23).For example, by setting the LCG IDs configured using logicalChannelGroup-XR-Ext-r18 to 16, it becomes possible to set more LCG IDs than the number of LCG IDs configured using logicalChannelGroup (i.e., 8). Alternatively, the maximum number of LCGs that can be configured using logicalChannelGroup-XR-Ext-r18 may be 256 (for example, 256 LCGs with IDs from 0 to 255, or 256 LCGs with IDs from 256 to 511). In other words, the LCG IDs configured using logicalChannelGroup-XR-Ext-r18 may be any value from 0 to 255 (or any value from 256 to 511). For example, by setting the LCG IDs configured using logicalChannelGroup-XR-Ext-r18 to 256 to 511, it becomes possible to set LCG IDs different from those configured using logicalChannelGroup and / or logicalChannelGroup-IAB-Ext-r17 (i.e., from 0 to 255). Thus, when logicalChannelGroup-XR-Ext-r18 is set on the UE200, it is possible to easily perform operations related to BSR without setting the LCG ID using different parameters, by ignoring the settings of other LCG IDs. 【0118】 Furthermore, as a third modification of this embodiment, the BS extended BSR setting information may be information used to indicate the type of UL data. For example, the type of UL data may be pose / control or video, etc. 【0119】 For example, as shown in information 37 of Figure 18, BSR-DataType-XR is included as a parameter of LogicalChannelConfig as BS Extended BSR configuration information. For example, as shown in table 47 of Figure 19, if BSR-DataType-XR is present, it indicates that the UE200 is configured to report a BS Extended BSR for the LCG to which the logical channel buffered with UL data of the indicated type belongs. Conversely, if BSR-DataType-XR is not present, it indicates that the UE200 is not configured to report a BS Extended BSR, i.e., it is configured to report a Legacy BSR. 【0120】 Thus, according to the first modified example 1 of this embodiment, the BS extended BSR setting information may be information regarding the length of at least one modified second field. This allows the information regarding the length of the modified second field to also indicate whether or not to use BS extended BSR. Therefore, it is possible to suppress the increase in communication resources for signaling BS extended BSR setting information. Furthermore, by indicating the length of the second field whose size has been increased, the size of the modified second field can be dynamically changed. 【0121】 Furthermore, according to the first modified example 2 of this embodiment, the BS extended BSR setting information may be information for identifying an LCG that uses the BS extended BSR. In this way, by combining whether or not to use the BS extended BSR and the LCG ID into a single piece of information, it is possible to identify the LCG ID of the logical channel and simultaneously determine whether or not to use the BS extended BSR. 【0122】 Furthermore, according to the first modified example 3 of this embodiment, the BS extended BSR setting information may be information used to indicate the type of UL data. This makes it possible to indicate whether or not to use the BS extended BSR for each type of UL data. Therefore, it is possible to select an appropriate BSR according to the type of UL data. In particular, XR data has greatly different characteristics depending on the data type. Therefore, by selecting an appropriate BSR according to the type of XR data, scheduling suitable for XR data becomes possible. 【0123】 (2) Second variation: Another example of configuration information including BS extended BSR configuration information In the embodiments of the present disclosure described above, the BS extended BSR configuration information is included in the logical channel configuration information. However, the BS extended BSR configuration information according to the embodiments of the present disclosure is not limited to this example. 【0124】 As a second modification of this embodiment, the BS extended BSR setting information may be included in the LCG setting information. In this way, the BS extended BSR is set for each LCG. This modification will be described in detail with reference to Figure 20. 【0125】 For example, LCG configuration information 51 is newly added as RRC configuration information, and BS extended BSR configuration information is included in LCG configuration information 51 as shown in Figure 20. This LCG configuration information 51 is included in the RRC message and sent to UE200. 【0126】 Furthermore, as a second variation of this embodiment, the BS extended BSR setting information may be included in the SR setting information. In this way, the BS extended BSR is set for each SR. 【0127】 For example, BS extended BSR configuration information is included in SchedulingRequestConfig or SchedulingRequestResourceConfig, which are examples of SR configuration information 53 as shown in Figure 20, and is associated with schedulingRequestID. Here, schedulingRequestID is also included in the logical channel configuration information. Therefore, UE200 refers to the BS extended BSR configuration information included in SR configuration information 53 via the schedulingRequestID set for the logical channel belonging to the LCG, and decides whether to use BS extended BSR for that LCG. In other words, BS extended BSR can be said to be set indirectly for each logical channel via schedulingRequestID. 【0128】 Furthermore, as a second modification 3 of this embodiment, the BS extended BSR setting information may be included in the BSR setting information. That is, it indicates whether to use the BS extended BSR as the BSR of the UE200. In this way, the BS extended BSR is set for each UE200. 【0129】 For example, BS extended BSR configuration information is included in BSR-Config as an example of BSR configuration information 55, as shown in Figure 20. The UE200 refers to the BS extended BSR configuration information included in BSR-Config and decides whether to use BS extended BSR. 【0130】 Thus, according to the second modification 1 of this embodiment, the BS extended BSR setting information may be included in the LCG setting information. This allows the BS extended BSR setting information to be set for each LCG. Since the BSR is reported for the LCG, the processing can be reduced compared to when the BS extended BSR is set for the logical channel. 【0131】 Furthermore, according to the second modification 2 of this embodiment, the BS extended BSR setting information may be included in the SR setting information. This allows the BS extended BSR setting information to be set for each SR. Therefore, it is possible to manage in one place whether or not to use the BS extended BSR for at least one logical channel set for the same SR. 【0132】 Furthermore, according to the second modification 3 of this embodiment, the BS extended BSR setting information may be included in the BSR setting information. This allows the BS extended BSR setting information to be set for each UE200. Therefore, all BSRs used by the UE200 can be switched to BS extended BSR or not all at once. 【0133】 (3) Third variation: Other examples of BS extended BSR format In the embodiments of the present disclosure described above, the BS extended BSR includes a first field and a modified second field. However, the BS extended BSR according to the embodiments of the present disclosure is not limited to this example. 【0134】 As a third modification of this embodiment, the BS extended BSR may further include at least one second field. At least one extended second field corresponds to an LCG among a plurality of LCGs identified based on the BS extended BSR setting information, and at least one second field corresponds to an LCG among a plurality of LCGs other than the LCG identified based on the BS extended BSR setting information. In other words, only the Buffer Size field corresponding to the LCG among a plurality of LCGs identified based on the BS extended BSR setting information is extended. 【0135】 Specifically, the BS Extended BSR includes multiple LCG fields, at least one Extended Buffer Size field, and at least one Legacy Buffer Size field. The at least one Extended Buffer Size field corresponds to the LCG among the multiple LCGs for which the BS Extended BSR is to be used based on the BS Extended BSR configuration information. The at least one Legacy Buffer Size field corresponds to the LCGs other than the LCGs mentioned above. 【0136】 This modified example will be explained in detail with reference to Figure 10. For example, in format 21 of Figure 10, assume that Buffer Size 1 corresponds to LCG0 and Buffer Size 2 corresponds to LCG1. If it is decided to use the BS extended BSR for LCG0, the BS extended BSR will include a Buffer Size 1 field, which is longer than the legacy Buffer Size field, as the extended Buffer Size field. Also, if it is not decided to use the BS extended BSR for LCG1, the BS extended BSR will include a Buffer Size 2 field as the legacy Buffer Size field. 【0137】 Thus, according to the third modification of this embodiment, the BS extended BSR further includes at least one second field, at least one LCG is a plurality of LCGs, at least one extended second field corresponds to an LCG among the plurality of LCGs identified based on the BS extended BSR configuration information, and at least one second field corresponds to an LCG among the plurality of LCGs other than the LCG identified based on the above configuration information. This makes it possible to extend only the second field that requires extension, thereby suppressing an excessive increase in the size of the BSR. As a result, the waste of communication resources due to BSR transmission can be suppressed. 【0138】 (4) Fourth variation: Compliance with other TS In the examples described above of the embodiments of this disclosure, System 1 is a TS-compliant system for 5G or NR. However, System 1 according to the embodiments of this disclosure is not limited to this example. 【0139】 In a fourth modification of this embodiment, system 1 may be a system compliant with another 3GPP TS. For example, system 1 may be a system compliant with LTE (Long Term Evolution), LTE-A (LTE Advanced), or 4G TS, and base station 100 may be an eNB (evolved Node B). Alternatively, base station 100 may be an ng-eNB. In another example, system 1 may be a system compliant with 3G TS, and base station 100 may be a Node B. In yet another example, system 1 may be a system compliant with next-generation (e.g., 6G) TS. 【0140】 Alternatively, System 1 may be a system that conforms to the TS of another standardization body for mobile communications. 【0141】 <6. Second Embodiment> In the second embodiment of this disclosure, configuration information for determining whether the modified second field uses a BSR that includes delay information (hereinafter also referred to as a delayed BSR) is transmitted from the base station 100 to the UE200. Details that are substantially the same as those in the first embodiment will not be described. 【0142】 <6-1. Example of Operation> An example of the operation of the base station 100 and UE200 according to the second embodiment of this disclosure will be described with reference to Figures 21 to 24. 【0143】 (1) Format of delayed BSR The modified second field of the delayed BSR according to this embodiment includes a second field and a third field different from the second field. In other words, the modified second field is obtained by adding the third field to the second field. 【0144】 Specifically, the modified second field includes a Buffer Size field as the second field and a delay information field as the third field. The delay information field contains information used to indicate the delay information of the LCG. The delay information contains information used to indicate the remaining time until the allowable delay of the data belonging to the corresponding LCG. 【0145】 The format of the delayed BSR according to this embodiment will be described in detail with reference to Figures 21A and 21B. Figures 21A and 21B show examples of MAC CE formats for a delayed BSR in which the Buffer Size field of a legacy Long BSR has been modified. Note that the delayed BSR is not limited to a legacy Long BSR, but may be a BSR in which the Buffer Size field of a legacy BSR of any of the above formats has been modified. 【0146】 For example, the delayed BSR includes the LCGi field as the first field, and the reduced Buffer Size j field and Delay Info j field as modified second fields, as shown in format 23A of Figure 21A. The LCGi field indicates the presence of the reduced Buffer Size j field and Delay Info j field for LCGi. 【0147】 The reduced buffer size j field, like the legacy buffer size j field, identifies the total amount of data available across all logical channels belonging to the corresponding LCGi. The size of the reduced buffer size j field is, for example, 6 bits, which is shorter than the legacy buffer size j field's 8 bits. However, the size of the reduced buffer size j field is not limited to this and may be any other size shorter than the legacy buffer size j field. Furthermore, the size of the reduced buffer size j field may vary depending on the corresponding LCGi. 【0148】 The reduced Buffer Size j field indicates an index corresponding to the Buffer Size (e.g., Buffer Size level, Buffer Size value, or Buffer Size range) in a table for a 6-bit Buffer Size field, which is not shown in the diagram. 【0149】 The third field, the Delay Info j field, contains information used to indicate the delay information of the corresponding LCGi. The size of the Delay Info j field is, for example, 2 bits, which is shorter than the size of the Legacy Buffer Size j field (8 bits). The sum of the size of the Reduced Buffer Size j field and the size of the Delay Info j field is equal to the size of the Legacy Buffer Size j field. However, the size of the Delay Info j field is not limited to this and may be any other size shorter than the Legacy Buffer Size j field. Also, the size of the Delay Info j field may differ depending on the corresponding LCGi. 【0150】 The Delay Info j field indicates the remaining time (in milliseconds, slots, or subframes) until the allowable delay of the data belonging to the corresponding LCG. The Delay Info j field may also indicate an index corresponding to the remaining time (e.g., a value or range of the remaining time) or a flag corresponding to the remaining time (e.g., a flag indicating the magnitude of the remaining time). 【0151】 The reduced Buffer Size j field and the Delay Info j field are treated as a single unit, and their combinations are included in ascending order according to LCGi. 【0152】 Alternatively, for example, the delayed BSR may include the LCGi field as the first field, and the Legacy Buffer Size j field and Delay Info i field as modified second fields, as shown in format 23B of Figure 21B. 【0153】 In format 23A, the Delay Info j field replaces part of the legacy Buffer Size field, while in format 23B, the Delay Info i field is added to the legacy Buffer Size field. For example, the Delay Info i field is added between the LCGi field and the legacy Buffer Size field. Alternatively, the Delay Info i field may be added after the legacy Buffer Size field. 【0154】 The contents and size of the Delay Info i field are the same as in format 23A. The Buffer Size j field and the Delay Info i field are included in ascending order according to LCGi, respectively. 【0155】 Delayed BSRs are distinguished from BSRs of other formats. For example, an LCID / eLCID indicating a delayed BSR is defined. This allows delayed BSRs to be transmitted as MAC CEs. Note that the MAC CE of a delayed BSR may also be transmitted included in a MAC PDU. That is, a MAC subheader containing the LCID / eLCID indicating a delayed BSR and the MAC CE of the delayed BSR are included in a MAC subPDU, and the MAC PDU containing this MAC subPDU is transmitted. 【0156】 (2) Delay BSR setting information Configuration information (hereinafter also referred to as delay BSR configuration information) for determining whether to use the delayed BSR according to this embodiment is defined. The delay BSR configuration information is included in the logical channel configuration information. As a result, the delay BSR is configured for each logical channel. The delay BSR configuration information will be described in detail with reference to Figures 22 and 23. 【0157】 Specifically, the delayed BSR setting information is included in LogicalChannelConfig. For example, as shown in information 39 in Figure 22, BSR-DelayApplied as delayed BSR setting information may be included as a parameter of LogicalChannelConfig. Note that the LogicalChannelConfig according to this embodiment may be substantially the same as the LogicalChannelConfig described in the first embodiment, except for BSR-BSExtApplied, and the part related to BSR-BSExtApplied may be replaced with BSR-DelayApplied. 【0158】 Furthermore, the delayed BSR setting information is a flag. For example, as shown in Table 49 of Figure 23, if BSR-DelayApplied exists, it indicates that the UE200 is configured to report delayed BSRs. Conversely, if BSR-DelayApplied does not exist, it indicates that the UE200 is not configured to report delayed BSRs, i.e., it is configured to report legacy BSRs. Note that the delayed BSR setting information is not limited to a flag that indicates whether to use delayed BSRs based on whether it exists or not, but may also be a flag that indicates whether to use delayed BSRs based on its value. For example, if the value of the delayed BSR setting information is 0, it may indicate that legacy BSRs will be used, and if the value is 1, it may indicate that delayed BSRs will be used. 【0159】 (3) Messages containing configuration information Messages containing delayed BSR configuration information are essentially identical to messages containing extended BS BSR configuration information, therefore their explanation is omitted. 【0160】 (4) Operation of UE200 based on configuration information In this embodiment, UE200 determines whether to use delayed BSR based on delayed BSR setting information obtained from the received RRC message. For example, UE200 determines whether to use delayed BSR for a logical channel based on the delayed BSR setting information included in the logical channel's configuration information. UE200 uses delayed BSR when reporting the buffer status for the LCG to which a logical channel determined to use delayed BSR belongs. 【0161】 For example, if the LogicalChannelConfig included in the received RRC message contains a BSR-DelayApplied as shown in Figure 22, the UE200 will use a delayed BSR as the BSR for the LCG containing the logical channel to which the LogicalChannelConfig is set. 【0162】 (5) Processing flow An example of the processing according to this embodiment will be explained with reference to Figure 13. Note that the processing from steps S310 to S340 is achieved by replacing the BS extended BSR in the first embodiment with a delayed BSR, and replacing the BSR-BSExtApplied in the first embodiment with BSR-DelayApplied, so the explanation will be omitted. 【0163】 UE200 transmits an enhanced-BSR MAC CE to base station 100 (step S350). For example, UE200 generates a delayed BSR MAC CE by setting the index corresponding to the Buffer Size of the UL data in the corresponding Reduced Buffer Size field for each LCG, as shown in Figure 21A, and setting the delay information in the corresponding Delay Info field. Alternatively, UE200 generates a delayed BSR MAC CE by setting the index corresponding to the Buffer Size of the UL data in the corresponding Buffer Size field for each LCG, as shown in Figure 21B, and setting the delay information in the corresponding Delay Info field. UE200 transmits the generated delayed BSR MAC CE to base station 100. Note that UE200 may also transmit an enhanced-BSR MAC CE (i.e., a delayed BSR MAC CE) by applying a Logical Channel Prioritization (LCP) procedure, similar to the first embodiment. 【0164】 Thus, according to embodiments of the present disclosure, the modified second field included in the enhanced-BSR includes the second field and a third field different from the second field. This allows for the addition of information of a different content and / or format than the information indicated by the second field. 【0165】 Furthermore, the second field is a Buffer Size field that indicates information used to show the total amount of data for each logical channel of the corresponding LCG, and the third field is a field that indicates information used to show delay information for the corresponding LCG, which indicates information used to show the remaining time until the allowable delay of the data belonging to the corresponding LCG. This makes it possible to report delay information for buffered data. Therefore, scheduling can be performed taking delay information into consideration for the data. In particular, since PDB may be imposed on XR data, reporting delay information for XR data using a delayed BSR makes it possible to schedule data that satisfies the PDB. 【0166】 <6-2. Variant Example> The first to fifth modifications according to the second embodiment of this disclosure are described below. Two or more of these modifications may be combined. 【0167】 (1) First variation: Another example of delayed BSR configuration information In the embodiments of this disclosure described above, the delayed BSR setting information is a flag. However, the delayed BSR setting information according to the embodiments of this disclosure is not limited to this example. 【0168】 As a first modification of this embodiment, the delayed BSR setting information may be information relating to the length of at least one modified second field. Specifically, the delayed BSR setting information is information indicating the length of the third field. The delayed BSR setting information according to this modification will be described in detail with reference to Figures 14 and 15. 【0169】 For example, instead of BSR-BufferSizeFieldLength shown in Information 33 of Figure 14, BSR-DelayInfoFieldLength is included as a parameter of LogicalChannelConfig as delayed BSR configuration information. For example, BSR-DelayInfoFieldLength indicates the length of the Delay Info field, similar to BSR-BufferSizeFieldLength shown in Table 43 of Figure 15. For example, if BSR-DelayInfoFieldLength exists, it indicates that UE200 is configured to report a delayed BSR and indicates the length of the Delay Info field in that delayed BSR. Conversely, if BSR-DelayInfoFieldLength does not exist, it indicates that UE200 is not configured to report a delayed BSR, i.e., it is configured to report a legacy BSR. 【0170】 Additionally, BSR-DelayInfoFieldLength may indicate information to show the length of the Delay Info field. For example, BSR-DelayInfoFieldLength may indicate an index corresponding to the length of the Delay Info field (e.g., the value or range of that length). 【0171】 Thus, according to the first modified example 1 of this embodiment, the delayed BSR setting information may be information regarding the length of at least one modified second field. Furthermore, by indicating the length of the third field in the delayed BSR setting information, the lengths of the third field and the modified second field can be dynamically changed. 【0172】 Furthermore, as a second modification of the first embodiment, the delayed BSR setting information may be information for identifying an LCG that uses a delayed BSR. This modification is implemented by replacing the BS extended BSR related to the first modification 2 of the first embodiment with a delayed BSR, so its explanation is omitted. 【0173】 Furthermore, as a third modification of this embodiment, the delayed BSR setting information may be information used to indicate the type of UL data. This modification is implemented by replacing the BS extended BSR related to the third modification of the first embodiment with a delayed BSR, so its explanation is omitted. 【0174】 (2) Second variation: Another example of configuration information including delayed BSR configuration information In the embodiments of the present disclosure described above, the delayed BSR configuration information is included in the logical channel configuration information. However, the delayed BSR configuration information according to the embodiments of the present disclosure is not limited to this example. 【0175】 As a second modification 1 of this embodiment, the delayed BSR setting information may be included in the LCG setting information. This modification is implemented by replacing the BS extended BSR related to the second modification 1 of the first embodiment with a delayed BSR, so its explanation is omitted. 【0176】 Furthermore, as a second modification of this embodiment, the delayed BSR setting information may be included in the SR setting information. This modification is implemented by replacing the BS extended BSR related to the second modification of the first embodiment with a delayed BSR, so its explanation is omitted. 【0177】 Furthermore, as a second modification 3 of this embodiment, the delayed BSR setting information may be included in the BSR setting information. Note that this modification is realized by replacing the BS extended BSR related to the second modification 3 of the first embodiment with a delayed BSR, so its explanation is omitted. 【0178】 (3) Third variation: Other examples of delayed BSR format In the embodiments of the present disclosure described above, the delayed BSR includes a first field and a modified second field. However, the delayed BSRs according to the embodiments of the present disclosure are not limited to this example. 【0179】 As a third modification of this embodiment, the delayed BSR may further include at least one second field. At least one modified second field corresponds to an LCG among a plurality of LCGs identified based on the delayed BSR setting information, and at least one second field corresponds to an LCG among the plurality of LCGs other than the LCG identified based on the delayed BSR setting information. In other words, the third field is added only to the second field corresponding to the LCG among the plurality of LCGs identified based on the delayed BSR setting information, and only the second field is modified. 【0180】 Specifically, a delayed BSR includes multiple LCG fields, at least one set of reduced Buffer Size field and Delay Info field, and at least one legacy Buffer Size field. The at least one set of reduced Buffer Size field and Delay Info field corresponds to the LCG among the multiple LCGs for which it has been decided to use a delayed BSR based on the delayed BSR setting information. The at least one legacy Buffer Size field corresponds to an LCG among the multiple LCGs other than the LCG mentioned above. 【0181】 This modification will be explained in detail with reference to Figure 21A. For example, in format 23A of Figure 21A, assume that Buffer Size 1 corresponds to LCG0 and Buffer Size 3 (not shown) corresponds to LCG1. If it is decided to use a delayed BSR for LCG0, the delayed BSR includes a 6-bit Buffer Size 1 field and a 2-bit Delay Info 1 field as a set of reduced Buffer Size field and Delay Info field. If it is not decided to use a delayed BSR for LCG1, the delayed BSR includes an 8-bit Buffer Size 3 field as a legacy Buffer Size field. 【0182】 Alternatively, the delayed BSR may include multiple LCG fields, a set of at least one legacy Buffer Size field and a Delay Info field, and at least one legacy Buffer Size field without a Delay Info field. The set of at least one legacy Buffer Size field and a Delay Info field corresponds to the LCG among the multiple LCGs for which it has been decided to use the delayed BSR based on the delayed BSR configuration information. The at least one legacy Buffer Size field without a Delay Info field corresponds to an LCG among the multiple LCGs other than the LCG mentioned above. 【0183】 This modified example will be explained in detail with reference to Figure 21B. For example, in format 23B of Figure 21B, assume that Buffer Size 1 corresponds to LCG0 and Buffer Size 3 (not shown) corresponds to LCG1. If it is decided to use a delayed BSR for LCG0, the delayed BSR includes an 8-bit Buffer Size 1 field and a 2-bit Delay Info 0 field as a set of legacy Buffer Size field and Delay Info field. If it is not decided to use a delayed BSR for LCG1, the delayed BSR includes an 8-bit Buffer Size 3 field as the legacy Buffer Size field and does not include Delay Info 1, unlike in Figure 23B. 【0184】 Thus, according to the third modification of this embodiment, only the second field requiring the addition of delay information can be modified, thereby suppressing an excessive increase in the size of the BSR. As a result, the waste of communication resources due to BSR transmission can be suppressed. 【0185】 (4) Fourth variation: Another example of a field showing delay information In the embodiments of the present disclosure described above, the modified second field includes the second and third fields. However, the modified second field in the embodiments of the present disclosure is not limited to this example. 【0186】 In a fourth modification of this embodiment, the modified second field may be a single field that serves as both the second and third fields. Specifically, at least one modified second field is a field that indicates information used to indicate the total amount of data for each logical channel of the corresponding at least one LCG, and the delay information of the corresponding at least one LCG. 【0187】 Referring to Figure 24, the format of the delayed BSR in this modified example will be described in detail. Figure 24 shows an example of the MAC CE format of a delayed BSR in which the Buffer Size field of a legacy Long BSR has been modified. Note that the delayed BSR in this modified example is not limited to a legacy Long BSR, but may also be a BSR in which the Buffer Size field of a legacy BSR of another format has been modified. 【0188】 For example, as shown in format 25 of Figure 24, the delay BSR includes multiple LCG fields and at least one Buffer Size / Delay Info field. The LCGi field indicates the presence of the Buffer Size / Delay Info j field for LCGi. The Buffer Size / Delay Info field indicates an index corresponding to the pair of Buffer Size and delay information. A table is defined showing the correspondence between this index and the pair of Buffer Size and delay information. The Buffer Size / Delay Info j field is included in ascending order according to LCGi. 【0189】 Note that Figure 24 shows an example where the size of the Buffer Size / Delay Info field is the same as the size of the legacy Buffer Size field, but it may be larger or smaller than the legacy Buffer Size field. For example, the size of the Buffer Size / Delay Info field may be 16 bits, 24 bits, or more. 【0190】 Furthermore, as in the third modification of this embodiment, the delay BSR may further include at least one second field. In other words, only the second field corresponding to the LCG identified based on the delay BSR setting information among the multiple LCGs is changed to the Buffer Size / Delay Info field. 【0191】 Thus, according to the fourth modification of this embodiment, in the delayed BSR, at least one modified second field is a field that indicates information used to indicate the total amount of data for each logical channel of the corresponding at least one LCG, and the delay information of the corresponding at least one LCG. This allows the Buffer Size and delay information to be managed in a single field in the BSR. Therefore, the reception processing (i.e., field analysis processing) of the BSR can be simplified. 【0192】 (5) Fifth variation: Compliance with other TS In the examples described above of the embodiments of this disclosure, System 1 is a TS-compliant system for 5G or NR. However, System 1 according to the embodiments of this disclosure is not limited to this example. System 1 may be a TS-compliant system, similar to the fourth modification of the first embodiment. 【0193】 While 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 illustrative and that various modifications are possible without departing from the scope and spirit of the present disclosure. 【0194】 For example, the steps in the process described herein do not necessarily have to be executed chronologically in the order shown in the flowchart or sequence diagram. For example, the steps in the process may be executed in a different order than that shown in the flowchart or sequence diagram, or they may be executed in parallel. Also, some steps in the process may be deleted, or additional steps may be added to the process. 【0195】 For example, a method including the operation of one or more components of the apparatus described herein may be provided, and a program for causing a computer to perform the operation of such components may be provided. A computer-readable non-transitory tangible storage medium on which such program is recorded may also be provided. Naturally, such methods, programs, and computer-readable non-transitory tangible storage mediums are also included in this disclosure. 【0196】 For example, one or more components of a base station described herein may be included in a module for the base station, or such module may be provided. That is, a base station module for performing the base station processing described herein may be provided. 【0197】 For example, one or more components of a user equipment (UE) described herein may be included in a module for the UE, or such module may be provided. That is, a module for the UE that performs the processing of the UE described herein may be provided. 【0198】 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. 【0199】 For example, in this disclosure, 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, UE may be a device installed on a mobile body, or the mobile body itself. The mobile body may be a vehicle such as a car or train, an aircraft such as an airplane or drone, or another mobile body such as a ship. Alternatively, in this disclosure, UE may be other IoT (Internet of Things) devices such as sensors and cameras. UE may be mobile or fixed. 【0200】 For example, in this disclosure, “transmit” may mean processing at least one layer in the protocol stack used for transmission, or it may mean physically transmitting a signal wirelessly or via a wire. Alternatively, “transmit” may mean a combination of processing at least one layer and physically transmitting a signal wirelessly or via a wire. Similarly, “receive” may mean processing at least one layer in the protocol stack used for reception, or it 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. 【0201】 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. 【0202】 For example, in this disclosure, “include” and “comprise” do not mean that only the listed items are included, but that they may include only the listed items or that they may include additional items in addition to the listed items. 【0203】 For example, in this disclosure, "or" does not mean exclusive OR, but rather logical OR. 【0204】 The technical features included in the embodiments described above may also be expressed as the following features. Of course, this disclosure is not limited to the following features. 【0205】 (Feature 1) A communication processing unit (233) receives a message containing configuration information for determining whether to use a buffer status report that includes at least one first field and at least one modified second field, An information acquisition unit (231) that acquires the setting information contained in the message, Equipped with, The aforementioned buffer status report is used to provide information about the amount of uplink data. The at least one first field indicates at least one logical channel group on which the buffer status is reported. The at least one modified second field corresponds to the at least one logical channel group and relates to the amount of uplink data. Equipment (200). 【0206】 (Feature 2) The aforementioned configuration information is included in the configuration information of the logical channel. The device described in Feature 1. 【0207】 (Feature 3) The aforementioned configuration information is included in the configuration information of the logical channel group. The device described in Feature 1. 【0208】 (Feature 4) The aforementioned configuration information is included in the scheduling request configuration information. The device described in Feature 1. 【0209】 (Feature 5) The aforementioned configuration information is included in the configuration information of the buffer status report. The device described in Feature 1. 【0210】 (Feature 6) The aforementioned configuration information is a flag. The apparatus described in any one of the features 1 to 5. 【0211】 (Feature 7) The aforementioned configuration information is information relating to the length of the at least one modified second field. The apparatus described in any one of the features 1 to 5. 【0212】 (Feature 8) The aforementioned configuration information is information for identifying the logical channel group that uses the buffer status report. The apparatus described in any one of the following features: 1 to 3. 【0213】 (Feature 9) The aforementioned configuration information is information used to indicate the type of uplink data. The apparatus described in any one of the features 1 to 5. 【0214】 (Feature 10) The buffer status report further includes at least one second field, The aforementioned at least one logical channel group is a plurality of logical channel groups, The at least one modified second field corresponds to a logical channel group identified based on the configuration information among the plurality of logical channel groups, The at least one second field corresponds to a logical channel group other than the logical channel group identified based on the configuration information among the plurality of logical channel groups. The apparatus described in any one of the features 1 to 9. 【0215】 (Feature 11) The at least one modified second field is the second field with increased size. The apparatus described in any one of the features 1 to 10. 【0216】 (Feature 12) The at least one modified second field is a buffer size field that indicates information used to indicate the total amount of data for each logical channel in the corresponding at least one logical channel group. The device described in Feature 11. 【0217】 (Feature 13) The at least one modified second field includes the second field and a third field different from the second field. The apparatus described in any one of the features 1 to 10. 【0218】 (Feature 14) The second field is a buffer size field that indicates information used to indicate the total amount of data for each logical channel in the corresponding at least one logical channel group, The third field is a field that indicates information used to indicate delay information for the corresponding at least one logical channel group, The aforementioned delay information indicates information used to show the remaining time until the allowable delay of data belonging to the corresponding at least one logical channel group. The device described in Feature 13. 【0219】 (Feature 15) The at least one modified second field is a field that indicates information used to indicate the total amount of data for each logical channel of the corresponding at least one logical channel group, and the delay information for the corresponding at least one logical channel group. The aforementioned delay information indicates information used to show the remaining time until the allowable delay of data belonging to the corresponding at least one logical channel group. The apparatus described in any one of the features 1 to 10. 【0220】 (Feature 16) The device is a user device or a module for a user device. The apparatus described in any one of the features 1 to 15. 【0221】 (Feature 17) Information acquisition unit (141) that acquires configuration information for determining whether to use a buffer status report that includes at least one first field and at least one modified second field, A communication processing unit (143) that sends a message containing the aforementioned configuration information, Equipped with, The aforementioned buffer status report is used to provide information about the amount of uplink data. The at least one first field indicates at least one logical channel group on which the buffer status is reported. The at least one modified second field corresponds to the at least one logical channel group and relates to the amount of uplink data. Equipment (100). 【0222】 (Feature 18) The device is a base station or a module for a base station. The device described in Feature 17. 【0223】 (Feature 19) A method performed by the apparatus (200), Receiving a message containing configuration information to determine whether to use a buffer status report that includes at least one first field and at least one modified second field, To obtain the configuration information contained in the aforementioned message, Includes, The aforementioned buffer status report is used to provide information about the amount of uplink data. The at least one first field indicates at least one logical channel group on which the buffer status is reported. The at least one modified second field corresponds to the at least one logical channel group and relates to the amount of uplink data. method. 【0224】 (Feature 20) A method performed by the apparatus (100), Obtain configuration information to determine whether to use a buffer status report that includes at least one first field and at least one modified second field, Sending a message containing the aforementioned configuration information, Includes, The aforementioned buffer status report is used to provide information about the amount of uplink data. The at least one first field indicates at least one logical channel group on which the buffer status is reported. The at least one modified second field corresponds to the at least one logical channel group and relates to the amount of uplink data. method. 【0225】 (Feature 21) Receiving a message containing configuration information to determine whether to use a buffer status report that includes at least one first field and at least one modified second field, To obtain the configuration information contained in the aforementioned message, A program that causes a computer to execute, The aforementioned buffer status report is used to provide information about the amount of uplink data. The at least one first field indicates at least one logical channel group on which the buffer status is reported. The at least one modified second field corresponds to the at least one logical channel group and relates to the amount of uplink data. program. 【0226】 (Feature 22) Obtain configuration information to determine whether to use a buffer status report that includes at least one first field and at least one modified second field, sending a message including the setting information; A program for causing a computer to execute, wherein the buffer status report is used to provide information about the uplink data volume, the at least one first field indicates at least one logical channel group for which the buffer status is reported, the at least one modified second field corresponds to the at least one logical channel group and relates to the uplink data volume Program. 【0227】 (Feature 23) receiving a message including setting information for determining whether to use a buffer status report including at least one first field and at least one modified second field; obtaining the setting information included in the message; A computer-readable non-transitory physical recording medium having recorded thereon a program for causing a computer to execute, wherein the buffer status report is used to provide information about the uplink data volume, the at least one first field indicates at least one logical channel group for which the buffer status is reported, the at least one modified second field corresponds to the at least one logical channel group and relates to the uplink data volume Non-transitory physical recording medium. 【0228】 (Feature 24) obtaining setting information for determining whether to use a buffer status report including at least one first field and at least one modified second field; sending a message including the setting information; A computer-readable, non-transitional, tangible recording medium that stores a program that causes a computer to execute a program, The aforementioned buffer status report is used to provide information about the amount of uplink data. The at least one first field indicates at least one logical channel group on which the buffer status is reported. The at least one modified second field corresponds to the at least one logical channel group and relates to the amount of uplink data. A non-transitional, tangible recording medium.

Claims

[Claim 1] A radio resource control (RRC) message is received from a base station device, which includes first information indicating the identifier (ID) of the logical channel group (LCG) to which the logical channel belongs, and second information indicating the ID of the LCG, used for transmitting a media access control element (MAC CE) including delay information. The communication processing unit includes, when the second information is included in the RRC message, a MAC protocol data unit (MAC PDU) that includes a MAC subheader containing the MAC CE for the LCG identified by the LCG ID indicated by the second information, and a logical channel identifier (LCID) for identifying the MAC CE, to the base station device, The MAC CE includes a first field, a second field, and a third field. The first field indicates that the second and third fields exist for the LCG identified by the LCG ID shown by the second information, The second field is a buffer size field corresponding to the LCG identified by the LCG ID shown by the second information, The third field is a field that indicates, as delay information, the remaining time in milliseconds for the data corresponding to the LCG identified by the LCG ID shown by the second information, and the remaining time is indicated as a range. Communication device. [Claim 2] The processing unit includes a mechanism for applying a logical channel prioritization procedure when transmitting the MAC CE. The aforementioned processing unit, The MAC CE is given a lower priority than the MAC CE for the Cell Radio Network Temporary Identifier (C-RNTI), Prioritize the aforementioned MAC CE over the MAC CE for the buffer status report included for padding. The communication device according to claim 1. [Claim 3] The buffer size field indicates the total amount of data for each logical channel included in the LCG, identified by the LCG ID shown by the second information. The communication device according to claim 1 or 2. [Claim 4] A radio resource control (RRC) message is transmitted to a communication device (200) including first information indicating an identifier (ID) of a logical channel group (LCG) to which a logical channel belongs, and second information indicating the ID of the LCG, which is used for transmitting a media access control element (MAC CE) including delay information. When the second information is included in the RRC message, the communication processing unit (143) receives from the communication device a MAC protocol data unit (MAC PDU) which includes a MAC subheader containing the MAC CE for the LCG identified by the LCG ID indicated by the second information, and a logical channel identifier (LCID) for identifying the MAC CE. The MAC CE includes a first field, a second field, and a third field. The first field indicates that the second and third fields exist for the LCG identified by the LCG ID shown by the second information, The second field is a buffer size field corresponding to the LCG identified by the LCG ID shown by the second information, The third field is a field that indicates, as delay information, the remaining time in milliseconds for the data corresponding to the LCG identified by the LCG ID shown by the second information, and the remaining time is indicated as a range. Base station equipment. [Claim 5] When the MAC CE is transmitted, the logical channel prioritization procedure is applied. The MAC CE is given lower priority than the MAC CE for the Cell Radio Network Temporary Identifier (C-RNTI), The aforementioned MAC CE is given higher priority than the MAC CE for the buffer status report included for padding. The base station device according to claim 4. [Claim 6] The buffer size field indicates the total amount of data for each logical channel included in the LCG, identified by the LCG ID shown by the second information. The base station device according to claim 4 or 5. [Claim 7] A radio resource control (RRC) message is received from a base station device, which includes first information indicating the identifier (ID) of the logical channel group (LCG) to which the logical channel belongs, and second information indicating the ID of the LCG, used for transmitting a media access control element (MAC CE) including delay information. If the second information is included in the RRC message, a MAC protocol data unit (MAC PDU) is transmitted to the base station device, which includes a MAC subheader containing the MAC CE for the LCG identified by the LCG ID indicated by the second information, and a logical channel identifier (LCID) for identifying the MAC CE. The MAC CE includes a first field, a second field, and a third field. The first field indicates that the second and third fields exist for the LCG identified by the LCG ID shown by the second information, The second field is a buffer size field corresponding to the LCG identified by the LCG ID shown by the second information, The third field is a field that indicates, as delay information, the remaining time in milliseconds for the data corresponding to the LCG identified by the LCG ID shown by the second information, and the remaining time is indicated as a range. Methods for communication devices. [Claim 8] When transmitting the MAC CE, apply the logical channel prioritization procedure. In the logical channel prioritization procedure, The MAC CE is given a lower priority than the MAC CE for the Cell Radio Network Temporary Identifier (C-RNTI), Prioritize the aforementioned MAC CE over the MAC CE for the buffer status report included for padding. The method according to claim 7. [Claim 9] The buffer size field indicates the total amount of data for each logical channel included in the LCG, identified by the LCG ID shown by the second information. The method according to claim 7 or 8.

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