WO2024096446A1 - 무선 통신 시스템에서 버퍼 상태 보고를 위한 방법 및 장치 - Google Patents
무선 통신 시스템에서 버퍼 상태 보고를 위한 방법 및 장치 Download PDFInfo
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- WO2024096446A1 WO2024096446A1 PCT/KR2023/016814 KR2023016814W WO2024096446A1 WO 2024096446 A1 WO2024096446 A1 WO 2024096446A1 KR 2023016814 W KR2023016814 W KR 2023016814W WO 2024096446 A1 WO2024096446 A1 WO 2024096446A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0278—Traffic management, e.g. flow control or congestion control using buffer status reports
Definitions
- This disclosure relates to the field of communications and to the operations of terminals and base stations.
- the present disclosure relates to a buffer status report (BSR) method of a terminal, a BSR acquisition method in a base station, and terminals, base stations, and communication systems related thereto.
- BSR buffer status report
- 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and includes sub-6 GHz ('Sub 6GHz') bands such as 3.5 gigahertz (3.5 GHz) as well as millimeter wave (mm) bands such as 28 GHz and 39 GHz. It is also possible to implement it in the ultra-high frequency band ('Above 6GHz') called Wave.
- 'Sub 6GHz' sub-6 GHz
- mm millimeter wave
- Wave ultra-high frequency band
- 6G mobile communication technology which is called the system of Beyond 5G
- Terra is working to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low delay time that is reduced to one-tenth. Implementation in Terahertz bands (e.g., 95 GHz to 3 THz) is being considered.
- ultra-wideband services enhanced Mobile BroadBand, eMBB
- ultra-reliable low-latency communications URLLC
- massive machine-type communications mMTC
- numerology support multiple subcarrier interval operation, etc.
- dynamic operation of slot format initial access technology to support multi-beam transmission and broadband
- definition and operation of BWP Band-Width Part
- New channel coding methods such as LDPC (Low Density Parity Check) codes for data transmission and Polar Code for highly reliable transmission of control information
- L2 pre-processing L2 pre-processing
- dedicated services specialized for specific services. Standardization of network slicing, etc., which provides networks, has been carried out.
- V2X Vehicle-to-Everything
- NR-U New Radio Unlicensed
- UE Power Saving NR terminal low power consumption technology
- NTN Non-Terrestrial Network
- IAB provides a node for expanding the network service area by integrating intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, and wireless backhaul links and access links.
- Intelligent factories Intelligent Internet of Things, IIoT
- Mobility Enhancement including Conditional Handover and DAPS (Dual Active Protocol Stack) handover
- 2-step Random Access (2-step RACH for simplification of random access procedures)
- Standardization in the field of wireless interface architecture/protocol for technologies such as NR is also in progress
- 5G baseline for incorporating Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technology Standardization in the field of system architecture/services for architecture (e.g., Service based Architecture, Service based Interface) and Mobile Edge Computing (MEC), which provides services based on the location of the terminal, is also in progress.
- NFV Network Functions Virtualization
- SDN Software-Defined Networking
- FD-MIMO full dimensional MIMO
- array antennas to ensure coverage in the terahertz band of 6G mobile communication technology.
- multi-antenna transmission technology such as Large Scale Antenna, metamaterial-based lens and antenna to improve coverage of terahertz band signals, high-dimensional spatial multiplexing technology using OAM (Orbital Angular Momentum), RIS ( In addition to Reconfigurable Intelligent Surface technology, Full Duplex technology, satellite, and AI (Artificial Intelligence) to improve the frequency efficiency of 6G mobile communication technology and system network are utilized from the design stage and end-to-end.
- the disclosed embodiment seeks to provide an apparatus and method that can effectively provide services in a wireless communication system.
- an RRC containing information about the buffer size table type that each LCG can refer to from the base station receiving a radio resource control) Reconfiguration message; Identifying whether a BSR is triggered; In response to triggering of BSR, generating a BSR MAC CE (media access control control element) based on the RRC Reconfiguration message; and transmitting the BSR MAC CE to the base station, wherein the BSR MAC CE may include information indicating a buffer size table type referenced by each logical channel group (LCG).
- RRC radio resource control
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- the buffer size table type referenced by each LCG may be determined based on the buffer size of each LCG.
- the method includes receiving a UECapabilityEnquiry message from the base station inquiring whether the terminal can use a first type buffer size table; And it may further include transmitting a UECapabilityInformattion message including information on whether the terminal can use the first type buffer size table to the base station.
- Information indicating the buffer size table type may be included in the LCG ID (identification) field or the buffer size table type field in the BSR MAC CE.
- a radio resource control (RRC) message containing information about the buffer size table type that each LCG can refer to is provided to the terminal.
- RRC radio resource control
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- the buffer size table type referenced by each LCG may be determined based on the buffer size of each LCG.
- the terminal in a terminal providing a buffer status report (BSR), includes a transceiver; and at least one processor coupled to the transceiver, wherein the at least one processor includes information about a buffer size table type that each LCG from the base station can refer to.
- a radio resource control (RRC) Reconfiguration message Receives, identifies whether the BSR is triggered, generates a BSR MAC CE (media access control control element) based on the RRC Reconfiguration message in response to the triggering of the BSR, and transmits the BSR MAC CE to the base station.
- the BSR MAC CE may include information indicating the buffer size table type referenced by each logical channel group (LCG).
- LCG logical channel group
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- the buffer size table type referenced by each LCG may be determined based on the buffer size of each LCG.
- the at least one processor receives a UECapabilityEnquiry message from the base station to inquire whether the terminal can use the first type buffer size table, and inquires about whether the terminal can use the first type buffer size table to the base station.
- a UECapabilityInformattion message containing information can be transmitted.
- Information indicating the buffer size table type may be included in the LCG ID (identification) field or the buffer size table type field in the BSR MAC CE.
- the base station in a base station that obtains a buffer status report (BSR), includes: a transceiver; and at least one processor coupled to the transceiver, wherein the at least one processor sends a radio resource control (RRC) Reconfiguration message to the terminal containing information about a buffer size table type that each LCG can refer to.
- RRC radio resource control
- RRC radio resource control
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- the present disclosure provides an apparatus and method that can effectively provide services in a wireless communication system.
- FIG. 1 is a diagram showing the structure of an NR system according to an embodiment of the present disclosure.
- Figure 2 is a diagram showing a wireless protocol structure in an NR system according to an embodiment of the present disclosure.
- FIG. 3 is a diagram illustrating a method for a terminal to determine a Buffer Status Report format in an NR system according to an embodiment of the present disclosure.
- FIG. 4 is a diagram illustrating the Short BSR/Short Truncated BSR MAC CE format of the NR system according to an embodiment of the present disclosure.
- FIG. 5 is a diagram illustrating the Long BSR/Long Truncated BSR MAC CE format of the NR system according to an embodiment of the present disclosure.
- FIG. 6 is a diagram illustrating a Short BSR buffer size reporting table of the NR system according to an embodiment of the present disclosure.
- FIG. 7 is a diagram illustrating the MAC Subheader format of the NR system according to an embodiment of the present disclosure.
- Figure 8 is a diagram illustrating NBT according to an embodiment of the present disclosure.
- Figure 9 is a diagram illustrating NBT according to an embodiment of the present disclosure.
- Figure 10 is a diagram illustrating a procedure in which a base station and a terminal determine whether the terminal supports NBT and set NBT-related settings through RRC signaling, according to an embodiment of the present disclosure.
- Figure 11 is a diagram illustrating a procedure in which a terminal reports preferred NBT or traffic characteristics to a base station through UAI and a procedure in which the base station sets NBT-related settings in the terminal, according to an embodiment of the present disclosure.
- FIG. 12 is a diagram illustrating NBT Short BSR MAC CE according to an embodiment of the present disclosure.
- FIG. 13 is a diagram illustrating NBT Short BSR MAC CE according to an embodiment of the present disclosure.
- FIG. 14 is a diagram illustrating NBT Short BSR MAC CE according to an embodiment of the present disclosure.
- Figure 15 is a diagram illustrating NBT Long BSR MAC CE according to an embodiment of the present disclosure.
- FIG. 16 is a diagram illustrating NBT Long BSR MAC CE according to an embodiment of the present disclosure.
- Figure 17 is a diagram illustrating NBT Long BSR MAC CE according to an embodiment of the present disclosure.
- Figure 18 is a diagram illustrating NBT Long BSR MAC CE according to an embodiment of the present disclosure.
- Figure 19 is a diagram illustrating NBT MAC CE according to an embodiment of the present disclosure.
- Figure 20 is a diagram illustrating a method of allocating a new LCID Codepoint to NBT Short BSR, NBT Long BSR, and NBT MAC CE, according to an embodiment of the present disclosure.
- Figure 21 is a diagram illustrating a method of allocating a new eLCID Codepoint to NBT Short BSR, NBT Long BSR, and NBT MAC CE, according to an embodiment of the present disclosure.
- Figure 22 is a diagram illustrating an NBT Long/Short BSR application method according to an embodiment of the present disclosure.
- Figure 23 shows a terminal device according to an embodiment of the present disclosure.
- Figure 24 shows a base station device according to an embodiment of the present disclosure.
- each block of the processing flow diagram diagrams and combinations of the flow diagram diagrams can be performed by computer program instructions.
- These computer program instructions can be mounted on a processor of a general-purpose computer, special-purpose computer, or other programmable data processing equipment, so that the instructions performed through the processor of the computer or other programmable data processing equipment are described in the flow chart block(s). It creates the means to perform functions.
- These computer program instructions may also be stored in computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing equipment to implement a function in a particular manner, so that the computer-usable or computer-readable memory
- the instructions stored in may also produce manufactured items containing instruction means that perform the functions described in the flow diagram block(s).
- Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so that a series of operational steps are performed on the computer or other programmable data processing equipment to create a process that is executed by the computer, thereby generating a process that is executed by the computer or other programmable data processing equipment. Instructions that perform processing equipment may also provide steps for executing the functions described in the flow diagram block(s).
- each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s).
- each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s).
- ' ⁇ unit' used in this embodiment refers to software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and ' ⁇ unit' refers to what roles. Perform.
- ' ⁇ part' is not limited to software or hardware.
- the ' ⁇ part' may be configured to reside in an addressable storage medium and may be configured to reproduce on one or more processors. Therefore, as an example, ' ⁇ part' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.
- components and 'parts' may be combined into a smaller number of components and 'parts' or may be further separated into additional components and 'parts'. Additionally, components and 'parts' may be implemented to regenerate one or more CPUs within a device or a secure multimedia card.
- the base station is the entity that performs resource allocation for the terminal, and may be at least one of Node B, BS (Base Station), eNB (eNode B), gNB (gNode B), wireless access unit, base station controller, or node on the network.
- a terminal may include a UE (User Equipment), MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions.
- the embodiments of the present disclosure can be applied to other communication systems having a similar technical background or channel type as the embodiments of the present disclosure described below.
- the embodiments of the present disclosure may be applied to other communication systems through some modifications without significantly departing from the scope of the present disclosure at the discretion of a person with skilled technical knowledge.
- this may include the 5th generation mobile communication technology (5G, new radio, NR) developed after LTE-A, and the term 5G hereinafter may also include the existing LTE, LTE-A, and other similar services.
- 5G new radio
- this disclosure may be applied to other communication systems through some modifications without significantly departing from the scope of the present disclosure at the discretion of a person with skilled technical knowledge.
- 3GPP 3rd generation partnership project
- LTE long term evolution
- NR 3GPP new radio
- next-generation/5G New Radio, NR
- BSR buffer status report
- the terminal selects a section index containing the amount of buffer data to be reported from among the data amount ranges for each section defined for each index in the buffer size table and includes it in the BSR.
- the buffer size table defined in the prior art is designed to express a larger amount of data in a longer section as the index value increases.
- NBT New BS (Buffer Size) Table
- Buffer status reporting in the NR system can be performed based on MAC (Medium Access Control) layer signaling between the terminal and the base station. That is, when a Buffer Status Report (BSR) is triggered at a specific transmission time, the terminal can include a BSR control element (MAC Control Element, MAC CE) in the MAC PDU and transmit it to the base station. At this time, the BSR control element indicates the amount of packets remaining in the transmission buffer of the terminal after the corresponding MAC PDU is configured, in logical channel group (Logical Channel Group, hereinafter referred to as LCG) units. The base station can use the BSR received from the terminal to estimate the amount of data currently remaining in the terminal's buffer. In the NR system, the terminal can manage the data transmission buffer to be transmitted to the base station for each of eight LCGs.
- MAC Control Element MAC Control Element
- LCG Logical Channel Group
- the purpose of this disclosure is to propose a method for improving communication performance between a terminal and a base station. Additionally, the purpose of this disclosure is to propose a BSR reporting method for a terminal and a BSR acquisition method for a base station.
- a method for improving communication performance between a terminal and a base station can be provided.
- a method for reporting a BSR for a terminal and a method for obtaining a BSR for a base station can be provided.
- FIG. 1 is a diagram illustrating the structure of an NR system according to an embodiment of the present disclosure.
- the wireless communication system includes several base stations (e.g., gNB 100, ng-eNB 110, ng-eNB 120, gNB 130) and an Access and Mobility Management Function (AMF). It may be composed of (140) and UPF (User Plane Function) (150). Of course, the wireless communication system is not limited to the configuration shown in Figure 1 and may include more or fewer components.
- AMF Access and Mobility Management Function
- a user equipment (hereinafter referred to as UE or terminal) 160 may access an external network through the base stations 100, 110, 120, and 130 and the UPF 150.
- base stations 100, 110, 120, and 130 are access nodes of a cellular network and can provide wireless access to terminals accessing the network. That is, in order to service users' traffic, the base stations (100, 110, 120, and 130) collect status information such as buffer status, available transmission power status, and channel status of the terminals and schedule them to connect the terminals and the core network (CN).
- CN core network
- Core networks; in particular, NR's CN is called 5GC).
- gNB (1a-05, 1a-20) can control a plurality of cells and performs adaptive modulation coding to determine the modulation scheme and channel coding rate according to the channel status of the terminal.
- AMC Adaptive Modulation & Coding
- the core network is a device that handles various control functions as well as mobility management functions for terminals and can be connected to multiple base stations. Additionally, 5GC can also be linked to existing LTE systems.
- a user plane (UP) related to the transmission of actual user data and a control plane (CP) such as connection management may be divided into two components, and the gNB 100 and gNB of FIG. 1 (130) can use UP and CP technologies defined in NR technology, and ng-eNB (110) and ng-eNB (120), although connected to 5GC, use UP and CP technologies defined in LTE (Long Term Evolution) technology. can be used.
- UP user plane
- CP control plane
- the AMF 140 is a device responsible for various control functions as well as mobility management functions for the terminal and is connected to a plurality of base stations, and the UPF 150 may refer to a type of gateway device that provides data transmission.
- the NR wireless communication system may include a Session Management Function (SMF). SMF can manage packet data network connections such as protocol data unit (PDU) sessions provided to the terminal.
- PDU protocol data unit
- Figure 2 is a diagram showing a wireless protocol structure in an NR/LTE system according to an embodiment of the present disclosure.
- the wireless protocols of the NR system are SDAP (Service Data Adaptation Protocol) (200) (290), PDCP (Packet Data Convergence Protocol) (210) (280), and RLC (Radio Link Control) at the terminal and base station, respectively. ) (220) (270), and MAC (Medium Access Control) (230) (260).
- SDAP Service Data Adaptation Protocol
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- SDAP Service Data Adaptation Protocol (200) (290) transmits user data, operates to map QoS flows to specific DRBs for uplink and downlink, and marks QoS flow ID for uplink and downlink.
- An operation of mapping a relective QoS flow to a data bearer for uplink SDAP PDUs can be performed.
- SDAP settings corresponding to each DRB may be provided from the upper RRC layer. Of course, it is not limited to the above example.
- PDCP Packet Data Convergence Protocol
- PDCP (210) (280) can provide sequential and non-sequential delivery functions, reordering, duplication detection, retransmission functions, and encryption and decryption functions. Of course, it is not limited to the above example.
- Radio Link Control (hereinafter referred to as RLC) 220, 270 can reconfigure PDCP PDU (Protocol Data Unit) to an appropriate size. Additionally, the RLCs 220 and 270 provide sequential and non-sequential delivery functions, and may provide ARQ functions, joining, splitting, reassembling functions, repartitioning functions, reordering functions, duplication detection functions, and error detection functions. . Of course, it is not limited to the above example.
- MAC (230) (260) is connected to several RLC layer devices configured in one terminal, and can perform operations of multiplexing RLC PDUs to MAC PDUs and demultiplexing RLC PDUs from MAC PDUs.
- the MAC 230 and 260 provide a mapping function, a scheduling information reporting function, a HARQ function, a priority adjustment function between logical channels, a priority adjustment function between terminals, an MBMS service confirmation function, a transmission format selection function, and a padding function. You can. Of course, it is not limited to the above example.
- the physical (PHY) layer 240 and 250 channel-codes and modulates upper layer data, creates OFDM symbols and transmits them over a wireless channel, or demodulates and channel-decodes OFDM symbols received through wireless channels to transmit them to the upper layer. It carries out the operation of transmitting to .
- the physical layer also uses HARQ (Hybrid ARQ) for additional error correction, and the receiving end transmits 1 bit to indicate whether the packet sent from the transmitting end has been received. This is called HARQ ACK/NACK information.
- downlink HARQ ACK/NACK information for uplink data transmission is transmitted through the PHICH (Physical Hybrid-ARQ Indicator Channel) physical channel
- PDCCH Physical Downlink Resource allocation, etc. are transmitted.
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- RRC Radio Resource Control
- CA technology is a technology that replaces the use of only one carrier for communication between a terminal (or User Equipment, UE) and a base station (eNB or gNB) by using a main carrier and one or more secondary carriers to increase the number of secondary carriers. Transmission volume can be dramatically increased.
- a cell within a base station using a main carrier is called a main cell or PCell (Primary Cell), and a cell within a base station using a subcarrier is called a bushel or SCell (Secondary Cell).
- FIG. 3 shows the Buffer Status Report (BSR, hereinafter referred to as BSR) format when the terminal reports the amount of uplink available data (hereinafter referred to as uplink buffer size) to the base station in the NR system according to an embodiment of the present disclosure.
- BSR Buffer Status Report
- the uplink buffer size is selected between Long BSR and Short BSR depending on the number of Logical Channel Groups (LCG) greater than 0. You can select one and transmit it (310). Specifically, if there are more than one LCG with an uplink buffer size larger than 0 (exceeds), the UE may select the Long BSR MAC CE (330), and if there is one, the UE may select the Short BSR MAC CE (320).
- LCG Logical Channel Groups
- FIG. 4 is a diagram illustrating the Short BSR/Short Truncated BSR MAC CE format defined in the NR system according to an embodiment of the present disclosure.
- Short BSR MAC CE may include 3-bit LCG ID (400) and 5-bit Buffer Size (410) fields.
- the LCG ID (400) represents the ID (0 to 7) of the LCG
- the Buffer Size (410) field displays the Buffer Size (BS) Index determined by the uplink buffer size corresponding to the LCG ID (400).
- BS Index has values between 0 and 31.
- the BS Index can display the Index of the section that includes the uplink buffer size corresponding to the LCG ID (400) among the buffer size sections defined in the predefined buffer size table (see FIG. 6).
- FIG. 5 is a diagram illustrating the Long BSR/Long Truncated BSR MAC CE format defined in the NR system according to an embodiment of the present disclosure.
- Long BSR MAC CE can indicate the presence or absence of a Buffer Size field corresponding to each of the eight LCGs from LCG ID 7 (500) to LCG ID 0 (507) with 8 bits of the first byte. there is. If the bit is 0 (540), it may mean that the Buffer Size field of LCG corresponding to the bit of Long BSR MAC CE does not exist. Conversely, if the bit is 1 (541), it may mean that the Buffer Size field of the LCG corresponding to the bit of the Long BSR MAC CE exists.
- Long BSR MAC CE there may be a Buffer Size field equal to the number of Bit 1s among the first bytes.
- the length of the Buffer Size field (510, 520, 530) of Long BSR MAC CE may be 8-bit.
- Long Truncated BSR MAC CE is 8 bits of the first byte and determines whether the uplink buffer size of each LCG is greater than 0 (i.e., available uplink buffer size) for each of the 8 LCGs from LCG ID 7 (500) to LCG ID 0 (507). It can be displayed whether there is link data. If Bit is 0 (550), it may mean that there is available uplink data in the corresponding LCG, and if Bit is 1 (551), it may mean that there is no available uplink data in the corresponding LCG.
- the number of Buffer Size fields (510, 520, 530) can be expressed as the L (750) field of the MAC Subheader that is attached to the front of MAC CE, and the Buffer Size fields (510, 520, 530) are available data.
- the remaining uplink resources are added to the MAC CE in descending order, considering their priorities.
- the Buffer Size field of Long BSR or Long Truncated BSR can also display the BS Index determined by the uplink buffer size.
- a Long BSR buffer size table for Long BSR is defined, and the index of the buffer size section that includes the uplink buffer size can be displayed as the Buffer Size field. While the length of the Buffer Size (410) of Short BSR MAC CE is 5-Bit, the length of the Buffer Size field of Long BSR or Long Truncated BSR MAC CE is 8-Bit, and the buffer size table referenced by Long BSR ranges from 0 to 254. A total of 255 BS Indexes have been defined so far, and 255 are Reserved and not in use. After receiving the BS Index, the base station can refer to the buffer size table for Long BSR to obtain information about the uplink buffer size for each LCG.
- FIG. 6 is a diagram illustrating a buffer size table for Short BSR defined in NR according to an embodiment of the present disclosure.
- the buffer size table for Short BSR can define the BS value (610), that is, the buffer size section, corresponding to each of the 32 BS Indexes (600) expressed as 0 to 31. For example, if the BS Index (600) is 2, it means that the corresponding uplink buffer size has a value between 11 Byte and 14 Byte.
- the base station can perform uplink resource allocation by referring to the uplink buffer size section corresponding to the LCG ID (400) and Buffer Size (400) field values.
- FIG. 7 is a diagram illustrating the format of the MAC Subheader defined in the NR system according to an embodiment of the present disclosure.
- a MAC CE with a fixed length may be preceded by a 1-Byte MAC Subheader consisting of R (700), F (705), and LCID (710). At this time, MAC CE can be indicated by LCID (710). Additionally, according to one embodiment, a MAC CE with a fixed length may be preceded by a 2-Byte MAC Subheader consisting of R (715), F (720), LCID (725), and eLCID (730). At this time, the presence and length of the eLCID 730 can be indicated by the LCID 725, and the MAC CE can be indicated by the eLCID 730.
- a MAC CE of variable length may be preceded by a 2-byte MAC Subheader consisting of R (735), F (740), LCID (745), and L (750) fields.
- F (740) can indicate whether the length of the L (750) field is 1-Byte or 2-Byte
- LCID (750) can indicate MAC CE.
- a MAC CE of variable length may be preceded by a 3-Byte MAC Subheader consisting of R (755), F (760), LCID (765), eLCID (770), and L (775).
- F (760) can indicate whether the length of L (775) is 1-Byte or 2-Byte
- LCID (765) can indicate the presence and length of eLCID (770)
- eLCID (770) can be indicated.
- F (760) can indicate whether the length of L (775) is 1-Byte or 2-Byte
- LCID (765) can indicate the presence and length of eLCID (770)
- eLCID (770) can be indicated.
- MAC CE Since the LCID value of the MAC Subheader attached to the Short BSR/Short Truncated BSR/Long BSR/Long Truncated BSR is different, the base station that received it can distinguish what format the received BSR is.
- the BS Index expressed in the Buffer Size field of MAC CE does not correspond to a specific buffer size, but may correspond to a specific buffer size interval of a predefined table.
- the size of the buffer size section can increase as the BS Index value increases, that is, as the buffer size increases.
- the larger the uplink buffer size the more the terminal transmits the BS Index corresponding to the larger buffer size section, and it is difficult for the base station receiving this to predict the exact buffer size, making efficient uplink resource allocation difficult.
- NBT NBT-related parameters
- Figure 8 is a diagram illustrating a method of configuring NBT according to an embodiment of the present disclosure.
- NBT may be composed of a total of 2 L indices.
- L may be equal to the length L-bit of the Buffer Size field of the corresponding LCG reported with reference to NBT in NBT Short BSR MAC CE or NBT Long BSR MAC CE.
- the Buffer Size field of the corresponding LCG reported with reference to NBT is 13-bit
- the number of Indexes in NBT may be 2 13
- the included Index may be from 0 to 2 13 -1.
- the Buffer Size field of the corresponding LCG reported with reference to the NBT is 16-bit
- the number of Indexes in the NBT may be 2 16
- the included Index may be from 0 to 2 16 -1.
- Index 0 (800) of NBT may indicate that the uplink buffer size of the corresponding LCG is 0 and there is no available data.
- Index 1 (810) of NBT can indicate that the uplink buffer size is greater than 0 and less than or equal to BS 1 . That is, BS 1 may indicate the upper limit of the BS section corresponding to Index 1 (810).
- NBT specifies the upper limits BS 1 , BS 2 , ..., BS 2 L -2 of the BS section corresponding to each index from Index 1 (810) to Index 2 L -2 (820).
- NBT can interpret the uplink buffer size section corresponding to each Index from Index 1 (810) to Index 2 L -2 (820) as a section with the upper limit of the immediately preceding Index as the lower limit and the upper limit of the corresponding Index as the upper limit. You can.
- the upper limit of the corresponding uplink buffer size may gradually increase. For example, if Index y is greater than Index x, the corresponding upper limit value BS y may be greater than BS x .
- Index 2 L -1 (830) may indicate a section in which the uplink buffer size is larger than the BS 2 L -2 .
- the sequence of upper limit values of the BS section corresponding to each index from Index 1 (810) to Index 2 L -2 (820) BS 1 , BS 2 , ..., BS 2 L -2 is formed by a specific rule. It can be.
- the sequence may be a geometric sequence in which the ratio of two consecutive terms is constant.
- BS 1 can be expressed as B min .
- BS 2 L -2 can be expressed as B max . BS 2 , ..., BS 2 L -2 is the smallest natural number among the values greater than or equal to the immediately preceding value multiplied by p (hereinafter, the smallest natural number among the values greater than or equal to x is expressed as ceil(x))
- ceil(x) It may be the same as
- BS n can be expressed as ceil(p ⁇ BS n-1 ).
- p can be expressed as (B max / B min ) 1 / (N-1) . N may be equal to 2 L -2.
- the sequence may be an arithmetic sequence in which the difference between two consecutive terms is constant.
- BS 1 can be expressed as B min .
- BS 2 L -2 can be expressed as B max .
- BS 2 L -2 may be equal to the smallest natural number greater than or equal to the immediately preceding value plus p.
- BS n can be expressed as ceil(p+BS n-1 ).
- p can be expressed as (B max -B min )/(N-1).
- N may be equal to 2 L -2.
- B min and B max can be delivered by the base station to the terminal through an RRC message or MAC CE.
- Figure 9 is a diagram illustrating a method of configuring NBT according to an embodiment of the present disclosure.
- NBT sets the lower limit of each uplink buffer size section corresponding to Index 0 (900) to Index 2 L -1 (930) as BS 0 , BS 1 , ..., BS 2 L -1. It can be displayed as . At this time, BS 0 can be displayed as B min . At this time, BS 2 L -1 can be expressed as B max . Additionally, BS 0 , BS 1 , ..., BS 2 L -1 may be a specific sequence formed by the above-mentioned rule. As an example, BS 0 , BS 1 , ..., BS 2 L -1 may be a geometric sequence in which B min is the first term and B max is the last term. As another example, BS 0 , BS 1 , ..., BS 2 L -1 may be an arithmetic sequence in which B min is the first term and B max is the last term.
- Figure 10 is a diagram illustrating a signaling procedure performed by a terminal and a base station to use NBT, according to an embodiment of the present disclosure.
- the base station 1010 may transmit a UECapabilityEnquiry message 1020 requesting a capability report to the terminal 1000 in a connected state.
- the base station may include a terminal capability request for each RAT type in the UECapabilityEnquiry message 1020. Requests for each RAT type may include requested frequency band information.
- the base station when the base station requests the terminal 1000 to generate a UECapabilityInformation message 1030 through the capability request message 1020, it may include filtering information that can indicate conditions and restrictions. At this time, through filtering information, the base station 1010 can indicate whether the terminal 1000 should report whether or not it supports NBT.
- the terminal 1000 may configure a UECapabilityInformation message 1030 corresponding to the UECapabilityEnquiry message 1020 and report a response to the capability request message to the base station 1010.
- the UECapabilityInformation message 1310 may include a parameter indicating whether the terminal supports NBT.
- a parameter may be 1 bit information. Additionally, as an example, if a parameter is included, it may be indicated that NBT is supported, and if a parameter is not included, it may be indicated that NBT is not supported.
- the base station 1010 may determine whether the terminal 1000 supports NBT based on the received UECapabilityInformation message 1030. If the base station 1010 determines that the terminal 1000 supports NBT, the base station 1010 sends an RRCReconfiguration message (1040) so that the terminal 1000 can report the uplink buffer size with reference to NBT when a specific condition is satisfied for a specific LCG. It can be instructed through . More specifically, for NBT-related settings, the RRCReconfiguration message 1040 may include at least one of the following configuration information. Of course, this is not limited to the examples below.
- -At least one of a specific DRB or DRB List, a specific LCG or LCG List, or a specific LCH or LCH List that forces reporting of uplink buffer sizes by referencing the NBT, or allows reference to the NBT when reporting uplink buffer sizes. It can contain one.
- -Can include an NBT Index or NBT number that can indicate the NBT to be referenced.
- B min which is the smallest value excluding 0 among the upper or lower limits for each index of NBT.
- B max which is the largest value among the upper or lower limits for each Index of NBT.
- -L may be included when the number of indices of NBT or the number of indices is expressed as 2 L.
- the Threshold value may be included to indicate that the NBT is referenced only when the uplink buffer size of the LCG is greater than or equal to a specific Threshold value.
- the terminal 1000 that has received the RRCReconfiguration message 1040 can update the information with the information included in the RRCReconfiguration message 1040.
- Figure 11 illustrates an operation in which the terminal provides NBT-related information to the base station through UEAssistanceInformation, and the base station updates the NBT settings of the terminal through RRCReconfiguration or NBT MAC CE in consideration of the information, according to an embodiment of the present disclosure. It is a drawing.
- the terminal when transmitting the UEAssistanceInformation message 1100 to the base station, the terminal may include the following NBT-related information.
- the parameter can be a parameter that expresses the XR Data Burst Size, PDU Set Size, or the size of the XR uplink buffer periodically created in the terminal.
- the UE may include a parameter specifying whether the buffer size table to be referenced or preferred when reporting the uplink buffer size to the base station is Legacy BS Table (including BS Table for Long BSR and Short BSR) or NBT. If there are multiple candidate NBTs, a parameter specifying which NBT it is can be included.
- the above-described NBT-related information may be included in the UEAssistanceInformation message 1100 for each terminal, DRB of the terminal, LCG of the terminal, or LCH of the terminal.
- the base station can change the NBT-related settings of the terminal through the RRCReconfiguration message (1110) after receiving the UEAssistanceInformation message (1100) transmitted by the terminal.
- the RRCReconfiguration message 1110 may include the same type of configuration information as the NBT-related configuration information included in the above-described RRCReconfiguration message 1040.
- the terminal that has received the RRCReconfiguration message (1110) can set the NBT-related configuration information according to the NBT-related configuration information included in the RRCReconfiguration message (1110).
- the base station can set the NBT-related configuration information of the terminal through the NBT MAC CE (1120).
- the NBT MAC CE (1120) may include the same type of configuration information as the NBT-related configuration information included in the RRCReconfiguration message (1110).
- the NBT MAC CE (1120) may include only some types of NBT-related configuration information included in the RRCReconfiguration message (1110).
- the NBT MAC CE (1120) may also include other types of configuration information in addition to the NBT-related configuration information included in the RRCReconfiguration message (1110).
- the terminal that has received the NBT MAC CE (1120) can change the NBT-related settings according to the setting information included in the NBT MAC CE (1120).
- Figure 12 is a diagram illustrating the NBT Short BSR MAC CE format that can be used when the terminal reports the uplink buffer size to the base station with reference to the NBT, according to an embodiment of the present disclosure.
- 3-bits of the first byte of NBT Short BSR MAC CE can indicate LCG ID (1200).
- the LCG ID (1200) can display the LCG corresponding to the uplink buffer size to be reported as NBT Short BSR.
- the LCG ID 1200 can display one LCG from LCG ID 0 to LCG ID 7.
- the Buffer Size field can be displayed as 13-bit, which is the combination of the remaining 5-bit (1210) and the second byte (1220) excluding the LCG ID 3-bit (1200) of the first byte of the NBT Short BSR MAC CE.
- the Buffer Size field may display the Index of the buffer size section corresponding to the uplink buffer size of the terminal's LCG ID (1200).
- the buffer section may correspond to one of the index-specific buffer sections defined by NBT. At this time, NBT may include up to 2 13 indices corresponding to different buffer sections.
- the Buffer Size field may directly display the uplink buffer size in bytes of the LCG ID (1200) of the terminal without referring to a specific NBT.
- the uplink buffer size that can be displayed as Buffer Size can range from 0 to (2 13 - 1) Bytes.
- the terminal uses the NBT Short BSR MAC CE format to refer to the NBT, which defines a more detailed buffer size section than the existing buffer size table for Short BSR, or directly expresses the uplink buffer size in bytes to determine the uplink buffer size. More details can be reported to the base station.
- Figure 13 is a diagram illustrating the NBT Short BSR MAC CE format that can be used when the terminal reports the uplink buffer size to the base station with reference to the NBT, according to an embodiment of the present disclosure.
- 3-bits of the first byte of NBT Short BSR MAC CE can indicate LCG ID (1300).
- the LCG ID 1300 may indicate the LCG corresponding to the uplink buffer size to be reported in the NBT Short BSR.
- the LCG ID 1300 can display one LCG from LCG ID 0 to LCG ID 7. Except for LCG ID 3-bit (1300) of the first byte of NBT Short BSR MAC CE, the remaining 5-bit (1310) can be used as a Reserved field.
- the 16-bit sum of the second byte (1320) and third byte (1330) of NBT Short BSR MAC CE can display the Buffer Size field.
- the Buffer Size field may indicate the Index of the buffer size section corresponding to the uplink buffer size of the LCG ID (1300) of the terminal.
- the buffer size section may correspond to one of the index-specific buffer size sections defined by NBT.
- NBT may include up to 2 16 indices corresponding to different buffer size sections.
- the Buffer Size field may directly display the uplink buffer size in bytes of the LCG ID (1300) of the terminal without referring to a specific NBT.
- the uplink buffer size that can be displayed as Buffer Size can range from 0 to (2 16 - 1) Bytes.
- the terminal uses the NBT Short BSR MAC CE format to refer to the NBT, which defines a more detailed buffer size section than the existing buffer size table for Short BSR, or directly expresses the uplink buffer size in bytes to determine the uplink buffer size. More details can be reported to the base station.
- the NBT referenced when using NBT Short BSR MAC CE may be the same NBT as the NBT referenced when using NBT Long BSR MAC CE.
- Figure 14 is a diagram illustrating the NBT Short BSR MAC CE format that can be used when the terminal reports the uplink buffer size to the base station with reference to the NBT, according to an embodiment of the present disclosure.
- the 8-bits of the first byte of the NBT Short BSR MAC CE can be interpreted as a Bitmap corresponding to 8 LCGs from LCG ID 7 to LCG ID 0, respectively.
- the NBT Short BSR MAC CE can be interpreted as reporting the uplink buffer size of the LCG corresponding to the bit.
- the Buffer Size field of LCG can be displayed in 16-bit, which is the combination of the second byte (1410) and third byte (1420) of NBT Short BSR MAC CE.
- the Buffer Size field may display the Index of the buffer size section corresponding to the uplink buffer size of the UE's LCG.
- the buffer size section may correspond to one of the index-specific buffer size sections defined by NBT.
- NBT may include up to 2 16 indices corresponding to different buffer size sections.
- the Buffer Size field may directly indicate the uplink buffer size in bytes of the UE's LCG without referring to a specific NBT.
- the uplink buffer size that can be displayed as Buffer Size can range from 0 to (2 16 - 1) Bytes.
- the terminal uses the NBT Short BSR MAC CE format to refer to the NBT, which defines a more detailed buffer size section than the existing buffer size table for Short BSR, or directly expresses the uplink buffer size in bytes to determine the uplink buffer size. More details can be reported to the base station.
- the NBT referenced when using NBT Short BSR MAC CE may be the same NBT as the NBT referenced when using NBT Long BSR MAC CE.
- the UE may report the uplink buffer size to the base station as an NBT Short BSR MAC CE that has the same format as the Short BSR MAC CE shown in FIG. 4, but has a new LCID or eLCID.
- the Buffer Size field 410 may display an Index corresponding to the buffer size section containing the uplink buffer size of the LCG corresponding to the LCG ID 400.
- the buffer size section may correspond to one of the index-specific buffer size sections defined by NBT.
- the UE may report the uplink buffer size to the base station using the Short BSR MAC CE shown in FIG. 4.
- the Buffer Size field 410 may display an Index corresponding to the buffer size section containing the uplink buffer size of the LCG corresponding to the LCG ID 400.
- the buffer size section may correspond to one of the index-specific buffer size sections defined by NBT.
- the base station that received the Short BSR MAC CE determines that the buffer size table that must be referred to when interpreting the Buffer Size field of the LCG transmitted by the terminal according to the NBT configuration information previously set in the terminal through RRCReconfiguration or NBT MAC CE is NBT. You can see that
- Figure 15 is a diagram illustrating the NBT Long BSR MAC CE format that can be used when the terminal reports the uplink buffer size to the base station with reference to the NBT, according to an embodiment of the present disclosure.
- the 8-bits (1500, 1501, 1502, 1503, 1504, 1505, 1506, 1507) of the first byte of NBT Long BSR MAC CE correspond to eight LCGs from LCG ID 7 to LCG ID 0, respectively. It can be interpreted as a Bitmap. That a specific bit among 8 bits is set to 1 may indicate that there is a Buffer Size field for reporting the uplink buffer size of the LCG corresponding to the bit set to 1 in the NBT Long BSR MAC CE. In addition, the fact that a specific bit among the 8 bits is set to 0 may indicate that there is no Buffer Size field for reporting the uplink buffer size of the LCG corresponding to the bit set to 0 in the NBT Long BSR MAC CE. .
- the remaining bytes except the first byte of the NBT Long BSR MAC CE may consist of one or more Buffer Size fields.
- the Buffer Size field may exist for each LCG for the LCG set to 1 among the LCG ID Bitmap.
- the Buffer Size field for each LCG can be determined by the number of Indexes for each buffer size section defined by the NBT referenced by the LCG. For example, if the number of NBT indexes is less than or equal to 2 L , the Buffer Size field length may be L-bit.
- the Buffer Size field may have a 16-bit length by combining two consecutive bytes.
- the 16-bit sum of the second byte (1510) and the third byte (1520) of the NBT Long BSR MAC CE can be interpreted as the Buffer Size field of a specific LCG.
- the Buffer Size field may indicate the Index of the buffer size section corresponding to the uplink buffer size of the LCG.
- the buffer size section may correspond to one of the index-specific buffer size sections defined by NBT. At this time, NBT may include up to 2 16 indices corresponding to different buffer size sections.
- the Buffer Size field may directly indicate the uplink buffer size in bytes of the LCG of the terminal without referring to a specific NBT.
- the uplink buffer size that can be displayed in the Buffer Size field can range from 0 to (2 L - 1) Bytes.
- L may mean the length L-bit of the Buffer Size field. For example, when L is 16, the Buffer Size field can display from 0 to (2 16 - 1) Bytes.
- the terminal uses the NBT Long BSR MAC CE format to refer to the NBT, which defines a more detailed buffer size section than the existing Long BSR buffer size table, or directly expresses the uplink buffer size in bytes to determine the uplink buffer size. can be reported to the base station in more detail.
- the arrangement order of the Buffer Size fields can be determined by referring to the Priority Level of the corresponding LCG.
- the LCGs can be arranged from the highest priority level to the lowest LCG.
- the priority level of the LCG can be set to the highest priority level among the priority levels of the LCH included in the LCG.
- the NBT Long BSR MAC CE format can add the Buffer Size field only for LCGs that report the uplink buffer size with reference to NBT. At this time, the uplink buffer size can be reported through the existing Long BSR, Short BSR, or Padding BSR for the remaining LCGs except for the LCG reported with reference to the NBT.
- Figure 16 is a diagram illustrating the NBT Long BSR MAC CE format that can be used when the terminal reports the uplink buffer size to the base station with reference to the NBT, according to an embodiment of the present disclosure.
- the 8-bits (1600, 1601, 1602, 1603, 1604, 1605, 1606, 1607) of the first byte of NBT Long BSR MAC CE are from LCG ID 7 (1600) to LCG ID 0 (1607), respectively. It can be interpreted as a Bitmap corresponding to 8 LCGs. As an example, the fact that a specific bit among 8 bits is set to 1 (1671) indicates that there is a Buffer Size field for reporting the uplink buffer size of the LCG corresponding to the bit set to 1 in the NBT Long BSR MAC CE. can do.
- the fact that a specific bit among the 8 bits is set to 0 (1670) may indicate that there is no Buffer Size field for reporting the uplink buffer size of the LCG corresponding to 0 bit in the NBT Long BSR MAC CE.
- the buffer size table referenced by each LCG may be the buffer size table for Long BSR, or NBT, or a specific NBT among several NBTs, depending on the NBT-related settings for each LCG previously set by the base station as RRC or MAC CE. .
- being set to one of two values (0 (1680) or 1 (1681)) of a specific bit among the eight bits means that the bit corresponding to the bit set to one of the two values in the NBT Long BSR MAC CE This may mean that there is always a Buffer Size field for reporting the uplink buffer size of the LCG, and the uplink buffer size is reported with reference to the NBT.
- the fact that a specific bit among the 8 bits is set to one of two values (0 (1680) or 1 (1681)) means that the uplink of the LCG corresponding to the bit that is set to the other of the two values in the NBT Long BSR MAC CE It can be indicated that the Buffer Size field for reporting the buffer size is always present, and the uplink buffer size is reported by referring to the buffer size table for Long BSR (Legacy table).
- the remaining bytes can be composed of one or multiple Buffer Size fields.
- the field length allocated to the NBT Long BSR MAC CE may be determined by the buffer size table referenced by the corresponding LCG.
- the Buffer Size field for each LCG may be determined by the number of Indexes included in the buffer size table referenced by the corresponding LCG.
- the Buffer Size field may be 1-Byte.
- the length of the Buffer Size field may be L-bit.
- L may be 8.
- L may be 16.
- L can be a value greater than 16.
- the Buffer Size field may display an Index corresponding to the buffer size section including the uplink buffer size of the LCG in the buffer size table referenced by the LCG.
- the buffer size section may correspond to one of the buffer size sections for each index defined in the referenced buffer size table.
- the Buffer Size field may directly display the uplink buffer size in bytes of the UE's LCG without referring to a specific NBT.
- the uplink buffer size that can be displayed in the Buffer Size field can range from 0 to (2 L - 1) Bytes.
- L may mean the length L-bit of the Buffer Size field. For example, if L is 16, the Buffer Size field can display from 0 to (2 16 - 1) Bytes. L can have a value greater than 16. Of course, it is not limited to the above example and the value of L is not limited.
- the base station can set which LCG to display the uplink buffer size in bytes directly in the Buffer Size field to the terminal through RRC or MAC CE in advance.
- whether to directly report the uplink buffer size in bytes of a specific LCG can be notified to the base station by setting the bit corresponding to the LCG in the first byte of the NBT Long BSR MAC CE to a predetermined value.
- the terminal uses the NBT Long BSR MAC CE format to refer to the NBT, which defines a more detailed buffer size section than the existing buffer size table for Long BSR, or directly expresses the uplink buffer size in bytes to determine the uplink buffer size. More details can be reported to the base station.
- the arrangement order of the Buffer Size fields can be determined by referring to the Priority Level of the corresponding LCG.
- the LCGs can be arranged from the highest priority level to the lowest LCG.
- the priority level of the LCG may be set to the highest priority level among the priority levels of the LCH included in the LCG.
- Figure 17 is a diagram illustrating the NBT Long BSR MAC CE format that can be used when the terminal reports the uplink buffer size to the base station with reference to the NBT, according to an embodiment of the present disclosure.
- the 8-bits (1700, 1701, 1702, 1703, 1704, 1705, 1706, 1707) of the first byte of NBT Long BSR MAC CE are from LCG ID 7 (1700) to LCG ID 0 (1707), respectively. It can be interpreted as a Bitmap corresponding to 8 LCGs. As an example, the fact that a specific bit among 8 bits is set to 1 (1761) may indicate that a Buffer Size field for reporting the uplink buffer size of the LCG corresponding to the specific bit exists in the NBT Long BSR MAC CE. there is.
- the remaining bytes can be composed of one or multiple Buffer Size fields.
- the T field (1710, 1740) can be added in front of the Buffer Size field (1711, 1720, 1741) of the LCG. there is.
- the T field (1710, 1740) can be used to indicate which buffer size table the Buffer Size field (1711, 1720, 1741) of the corresponding LCG is referencing.
- the T field may have a 1-bit length.
- one of the two values of the T field can indicate that the latter Buffer Size field refers to the buffer size table for Long BSR.
- one of the two values of the T field can indicate that what the Buffer Size field refers to is NBT.
- the length of the Buffer Size field can be determined by the value of the T field.
- the length of the T field is not limited to the above example.
- the remaining 7-bit (1741) excluding the T field (1740) can be allocated to the Buffer Size field. If the T field (1710) indicates that the NBT is referenced, a total of 15-bits, including the remaining 7-bit (1711) excluding the T field (1710) and the next byte (1720), can be allocated to the Buffer Size field. You can.
- the number of indices for each buffer size section defined by NBT may be less than or equal to 2 15 .
- the length of the corresponding Buffer Size fields (1730, 1750) may always be 1-Byte.
- LCG can always refer to the buffer size table for Long BSR.
- the T field length can be longer than 1-bit.
- the different values that the T field can have can be used to indicate which buffer size table each is referencing among several buffer size tables for NBT and Long BSR.
- the Buffer Size field of the LCG that indicates or allows NBT use may have 16-(T_length) bits.
- T_length can indicate the length in bits of the T field.
- the NBT can have up to 2 16-(T_length) indices for each buffer size section.
- the Buffer Size field immediately following one of the values that the T field can have may indicate that it directly displays the uplink buffer size in bytes without referring to a specific NBT.
- the uplink buffer size that can be displayed in the Buffer Size field can range from 0 to (2 16-T_length - 1) Bytes.
- the terminal uses the NBT Long BSR MAC CE format to refer to the NBT, which defines a more detailed buffer size section than the existing buffer size table for Long BSR, or directly expresses the uplink buffer size in bytes to determine the uplink buffer size. More details can be reported to the base station.
- the arrangement order of the Buffer Size fields can be determined by referring to the Priority Level of the corresponding LCG.
- the LCGs can be arranged from the highest priority level to the lowest LCG.
- the priority level of the LCG may be set to the highest priority level among the priority levels of the LCH included in the LCG.
- NBT Long BSR MAC CE which buffer size table is referenced when configuring the Buffer Size field of a specific LCG can be determined by the NBT-related settings set by the base station in advance as RRC or MAC CE.
- the terminal can configure and set the Buffer Size field of the LCG with reference to the NBT only when the uplink buffer size of the LCG is greater than or equal to a specific threshold value set by the base station. If the UE does not have a large uplink buffer size for a specific LCG, the signaling overhead of NBT Long BSR MAC CE can be reduced by limiting the length of the Buffer Size field without degrading performance by referring to the buffer size table for Long BSR instead of NBT. .
- Figure 18 is a diagram illustrating the NBT Long BSR MAC CE format that can be used when the terminal reports the uplink buffer size to the base station with reference to the NBT, according to an embodiment of the present disclosure.
- the first two bytes of NBT Long BSR MAC CE can be divided into 2 consecutive bits and used as 8 LCG star indicators (1800, 1801, 1802, 1803, 1804, 1805, 1806, 1807).
- the 2-bit indicator for each LCG can display a total of four cases. One of the four cases may indicate that the NBT Long BSR MAC CE does not have a Buffer Size field of the corresponding LCG (1850).
- the remaining three cases can be used when the Buffer Size field of the corresponding LCG exists.
- Each of the three cases can be used to indicate that a specific table among the three buffer size tables is referenced (1851, 1852, 1853).
- one of the three buffer size tables may be the buffer size table for Long BSR.
- the other two of the three buffer size tables may display different NBTs. At this time, two different NBTs may include the same number of indexes for each buffer size section, or may include a different number of indexes for each buffer size section.
- the remaining space except for the first two bytes of the NBT Long BSR MAC CE may be composed of one or more Buffer Size fields.
- the presence or absence of the Buffer Size field for each LCG can be derived by a 2-bit indicator for each LCG.
- the length of the Buffer Size field for each LCG can be determined by which buffer size table the LCG is referencing.
- the corresponding Buffer Size fields 1830 and 1840 may have a 1-byte length.
- the buffer size table referenced by a specific LCG is NBT, and the number of indices for each buffer size section included in the NBT is 2 L
- the Buffer Size field may have an L-bit length. L may be 8 or 16 or a value greater than 16. Of course, it is not limited to the above example.
- the Buffer Size field may directly display the uplink buffer size in Bytes without referring to a specific NBT. At this time, reporting the uplink buffer size directly through the Buffer Size field can be signaled through the 2-bit indicator of the corresponding LCG. At this time, the uplink buffer size that can be displayed in the Buffer Size field can range from 0 to (2 L - 1) Bytes. L may be equal to the length L-bit of the Buffer Size field.
- the buffer size table referenced by each LCG can be determined by the NBT-related settings set by the base station in advance as RRC or MAC CE. Additionally, the terminal can independently determine which buffer size table to refer to based on the uplink buffer size of the LCG. Additionally, it is possible to determine which buffer size table to refer to based on the threshold set by the base station.
- the NBT when reporting the uplink buffer size of the LCG only if the uplink buffer size of the LCG that allows the base station to refer to the NBT is greater than or equal to a specific threshold set by the base station, the NBT can be reported with reference to the LCG. . If the UE does not have a large uplink buffer size for a specific LCG, the signaling overhead of NBT Long BSR MAC CE can be reduced by limiting the length of the Buffer Size field without degrading performance by referring to the buffer size table for Long BSR instead of NBT. .
- the terminal uses the NBT Long BSR MAC CE format to refer to the NBT, which defines a more detailed buffer size section than the existing buffer size table for Long BSR, or directly expresses the uplink buffer size in bytes to determine the uplink buffer size. More details can be reported to the base station.
- the arrangement order of the Buffer Size fields can be determined by referring to the Priority Level of the corresponding LCG.
- the LCGs can be arranged from the highest priority level to the lowest LCG.
- the priority level of the LCG can be set to the highest priority level among the priority levels of the LCH included in the LCG.
- Figure 19 is a diagram illustrating the NBT MAC CE format transmitted to change the NBT-related settings of the terminal to the base station, according to an embodiment of the present disclosure.
- the NBT MAC CE may include at least one of the following information.
- Bitmap expressing whether NBT is referenced (or whether reference is allowed) for each LCG. Bitmap allocates 1-bit for each LCG, and can indicate whether the LCG should (or can refer to) the NBT with Bit 0 or 1.
- the minimum upper or lower limit excluding 0 can include the B min value itself or the Index corresponding to B min in a predefined table.
- B min can be displayed as a 2-Byte field.
- B min can be displayed as a 1-Byte field.
- B min can be displayed as a field longer than 2-Byte.
- the length of the B min field is not limited to the above example.
- B max can display the value as a 1-Byte or 2-Byte or longer field than 2-Byte.
- the length of the B max field is not limited to the above example.
- FIG. 20 illustrates allocating a new LCID for a new MAC CE proposed in this disclosure, according to an embodiment of the present disclosure.
- NBT Short BSR MAC CE (2040) and NBT MAC CE (2060) may have a fixed length, as described in FIG. 7, the MAC consisting of R (700), F (705), and LCID (710) A subheader can be attached, and the corresponding codepoint can be displayed as LCID (710).
- NBT Long BSR MAC CE (2050) may be of variable length
- a MAC Subheader consisting of R (735), F (740), LCID (745), and L (750) may be attached as described in FIG. 7.
- the codepoint of the corresponding MAC CE can be indicated by LCID (745)
- the length of the corresponding MAC CE can be indicated by L (750).
- the Codepoint value in FIG. 20 is not necessarily limited to a specific value. This is an example and is not limited to the value in FIG. 20. Additionally, a feature of the present disclosure is that it indicates NBT Short BSR MAC CE, NBT Long BSR MAC CE, and NBT MAC CE through a specific Codepoint/Index.
- FIG. 21 is a diagram illustrating an example of assigning a new eLCID to a newly defined MAC CE, according to an embodiment of the present disclosure.
- NBT Short BSR MAC CE (2100), NBT Long BSR MAC CE (2120), and NBT MAC It indicates CE (2120) and can be assigned to each.
- the NBT Short BSR MAC CE (2100) and NBT MAC CE (2120) may have a fixed length, so R (715), F (720), LCID (725), and eLCID (730) as described in FIG. ) may be attached to the MAC Subheader.
- the existence and length of the eLCID (730) can be indicated with the LCID (725), and the Codepoint corresponding to the MAC CE can be indicated with the eLCID (730).
- the NBT Long BSR MAC CE (2110) can be of variable length
- the MAC Subheader consisting of R (755), F (760), LCID (765), eLCID (770), and L (775) is It can stick.
- the Codepoint corresponding to the MAC CE can be displayed with eLCID (770), and the length of the MAC CE can be displayed with L (775).
- the relationship between Codepoint, Index, and LCID can be indicated.
- the Codepoint value is not necessarily limited to the Index value and LCID information in FIG. 21, and this corresponds to an example.
- a feature of the present disclosure is that a specific Codepoint matches a specific Index, and the specific Codepoint and Index indicate an LCID such as NBT Short BSR MAC CE, NBT Long BSR MAC CE, and NBT MAC CE.
- FIG. 22 is a diagram illustrating a method for a terminal to report an uplink buffer size with reference to an NBT, according to an embodiment of the present disclosure.
- the UE may decide to include the BSR in the MAC PDU (2200). If the terminal decides to include a BSR in the MAC PDU, it can be checked (2210) whether the number of LCGs with available data among the terminal's LCGs is greater than 1.
- the terminal can check (2250) whether the LCG with available data refers to the NBT when reporting the uplink buffer size. If the LCG with available data references NBT when reporting the uplink buffer size, the UE can apply the NBT Short BSR MAC CE format to the BSR (2270). If the LCG with available data refers to the buffer size table for Short BSR when reporting the uplink buffer size, the terminal can apply the Short BSR MAC CE format to the BSR (2260).
- the terminal checks (2220) whether at least one LCG that references the NBT exists when reporting the uplink buffer size among the LCGs with available data. You can. If there is at least one LCG that references NBT when reporting the uplink buffer size among the LCGs with available data, the UE may apply the NBT Long BSR MAC CE format as the BSR format (2240). If, among the LCGs with available data, there is no LCG that references the NBT when reporting the uplink buffer size, the UE may apply the Long BSR MAC CE format as the BSR format (2230).
- whether a specific LCG refers to the NBT when reporting the uplink buffer size may be determined by the NBT-related settings set by the base station in advance through RRC or MAC CE.
- the terminal may determine whether to refer to the NBT by additionally considering whether the uplink buffer size of the LCG is larger than the threshold preset by the base station.
- the Logical Channel Priority of NBT Long BSR and NBT Short BSR may be defined in the following order. Of course, this is not limited to the examples below.
- the NBT Long/Short BSR may be simultaneously included in the same MAC PDU in a complementary manner to the Long/Short BSR.
- NBT Long/Short BSR may have a Logical Channel Priority lower than data from any Logical Channel, except data from UL-CCCH. If the same MAC PDU includes both NBT Long/Short BSR and Long/Short BSR, the uplink buffer size of LCG reported in NBT Long/Short BSR will be reported to the base station based on the Buffer Size field value of NBT Long/Short BSR. You can.
- the Logical Channel Priority of NBT Long/Short BSR may be equal to MAC CE for (Extended) BSR, with exception of BSR included for padding.
- the Logical Channel Priority of LCG data reported in NBT Long/Short BSR can be set as the example below. Of course, this is not limited to the examples below.
- the Logical Channel Priority of LCG data reported as NBT Long/Short BSR may be at a specific location between MAC CE for BFR and MAC CE for (Extended) BSR, with exception of BSR included for padding.
- Logical Channel Priority of NBT Long/Short BSR may be defined in the following order. Of course, this is not limited to the examples below.
- the Logical Channel Priority of the uplink data of the LCG reported as NBT Long/Short BSR and NBT Long/Short BSR may be defined in the following order. Of course, this is not limited to the examples below.
- NBT Long BSR/NBT Long Truncated BSR is the same MAC CE Format as Long BSR/Long Truncated BSR, but may have different LCID/eLCID.
- the length of the Buffer Size field of NBT Long BSR/NBT Long Truncated BSR may be 8 Bits, similar to Long BSR/Long Truncated BSR.
- NBT Long BSR/NBT Long Truncated BSR may include Buffer Size fields corresponding to LCG whose bit is set to 1 among the first bytes.
- the arrangement order of the Buffer Size fields can be determined by the Ascending Order method based on LCG i (LCG i indicates logical channel group i). .
- NBT Long BSR/NBT Long Truncated BSR/Long BSR/Long Truncated BSR determines which MAC CE is the MAC CE transmitted by the terminal through different LCIDs or different eLCIDs of the MAC Subheader of the corresponding MAC CE.
- the base station can identify (or distinguish) the recognition.
- NBT Long BSR/NBT Long Truncated BSR includes only LCGs that report buffer sizes with reference to NBT, and can be used to report the buffer sizes of corresponding LCGs. For example, if a specific LCG is capable of/allowed to refer to NBT by the base station RRC or MAC CE settings, the UE may set the Buffer Size field of the LCG to refer to the NBT, and the Buffer Size field of the LCG will be set to NBT Long BSR. /NBT Long Truncated May be included and reported in BSR.
- the Buffer Size field of the relevant LCG is set by referring to the Legacy BS Table (e.g., equivalent to Table 6.1.3.1-2 of TS 38.321)
- the Buffer Size field of the relevant LCG is reported through Long BSR/Long Truncated BSR. It can be.
- other LCGs excluding LCGs that are possible/allowed to reference NBT can only refer to the Legacy BS Table.
- the LCGs that can be referenced in the NBT and Legacy BS Table may be set separately depending on the settings of the base station, and all LCGs may refer to the NBT and Legacy BS Table.
- the base station may interpret it with reference to the NBT when interpreting the Buffer Size field of the LCG. there is. Conversely, if the Buffer Size field for a specific LCG is reported through Long BSR/Long Truncated BSR, the base station uses the Legacy BS Table (e.g., Table 6.1.3.1 of TS 38.321) when interpreting the Buffer Size field of the LCG. It can be interpreted by referring to -2).
- the Legacy BS Table e.g., Table 6.1.3.1 of TS 38.321
- the UE determines that the buffer size of the corresponding LCG falls within the buffer size range covered by/included in the NBT. In this case, the buffer size can be reported by referring to the NBT. Conversely, if the buffer size of the LCG does not fall within the buffer size range covered by/included in the NBT, the UE reports the buffer size of the LCG in the Legacy BS Table (e.g., TS 38.321 (corresponding to Table 6.1.3.1-2).
- the Legacy BS Table e.g., TS 38.321 (corresponding to Table 6.1.3.1-2).
- the terminal may operate as follows.
- one Legacy BSR Long BSR, Long Truncated BSR, Short BSR, Short Truncated BSR, etc.
- one NBT BSR NBT Long BSR, NBT Long Truncated BSR, NBT Short BSR, NBT Short Truncated BSR, etc.
- a MAC PDU that has one Legacy BSR (Long BSR, Long Truncated BSR, Short BSR, Short Truncated BSR, etc.) and one NBT BSR (NBT Long BSR, NBT Long Truncated BSR, NBT Short BSR, NBT Short Truncated BSR, etc.)
- buffer size reporting for a specific LCG may only be included in one of the two BSRs, based on the referencing BS Table.
- the NBT Long BSR may include only a Buffer Size field (one Buffer Size field) for one LCG.
- NBT's Index/Codepoint 0 can be designed to indicate that there is no data available in the buffer.
- the number of Buffer Size fields included in NBT Long BSR may be 0.
- the MAC PDU reflects all BSR trigger events immediately before MAC PDU assembly: 1) only Long BSR without NBT Long BSR, or 2) only NBT Long BSR without Long BSR, or 3) Long BSR and NBT Long BSR If all are included, all BSRs triggered up to just before MAC PDU assembly can be cancelled.
- Figure 23 shows a terminal device according to an embodiment of the present disclosure.
- the terminal of the present disclosure may include a processor 2320, a transceiver 2300, and a memory 2310.
- the components of the terminal are not limited to the examples described above.
- the terminal may include more or fewer components than the aforementioned components.
- the processor 2320, the transceiver 2300, and the memory 2310 may be implemented in the form of a single chip.
- the processor 2320 can control a series of processes in which the terminal can operate according to the above-described embodiment of the present disclosure.
- the processor 2320 may control components of the terminal to perform the method for reporting buffer status according to the above-described embodiments.
- the processor 2320 may control the components of the terminal to perform the above-described embodiments of the present disclosure by executing a program stored in the memory 2310.
- the processor 2320 may be an Application Processor (AP), a Communication Processor (CP), a circuit, an application-specific circuit, or at least one processor.
- AP Application Processor
- CP Communication Processor
- the transceiver 2300 can transmit and receive signals with a network entity, another terminal, or a base station. Signals transmitted and received from network entities, other terminals, or base stations may include control information and data.
- the transceiver 2300 may be comprised of an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency.
- this is only an example of the transceiver 2300, and the components of the transceiver 2300 are not limited to the RF transmitter and RF receiver.
- the transceiver 2300 may receive a signal through a wireless channel and output it to the processor 2320, and transmit the signal output from the processor 2320 through a wireless channel.
- the memory 2310 can store programs and data necessary for operation of the terminal. Additionally, the memory 2310 may store control information or data included in signals transmitted and received by the terminal.
- the memory 2310 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media. Additionally, there may be multiple memories 2310. Additionally, according to one embodiment, the memory 2310 may store a program for performing the method for reporting the buffer status described above.
- Figure 24 shows a base station device according to an embodiment of the present disclosure.
- the base station of the present disclosure may include a processor 2420, a transceiver 2400, and a memory 2410.
- the components of the base station are not limited to the above examples.
- a base station may include more or fewer components than those described above.
- the processor 2420, the transceiver 2400, and the memory 2410 may be implemented in the form of a single chip.
- the processor 2420 can control a series of processes by which the base station can operate according to the above-described embodiment of the present disclosure.
- the processor 2420 may control components of the base station to perform the method for buffer status reporting according to the above-described embodiments.
- the processor 2420 may control the components of the base station to perform the above-described embodiments of the present disclosure by executing a program stored in the memory 2410.
- the processor 2420 may be an Application Processor (AP), a Communication Processor (CP), a circuit, an application-specific circuit, or at least one processor.
- AP Application Processor
- CP Communication Processor
- the transceiver 2400 can transmit and receive signals with a network entity, another base station, or a terminal. Signals transmitted and received from network entities, other base stations, or terminals may include control information and data.
- the transceiver 2400 may be comprised of an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency.
- this is only an example of the transceiver 2400, and the components of the transceiver 2400 are not limited to the RF transmitter and RF receiver.
- the transceiver 2400 may receive a signal through a wireless channel and output it to the processor 2420, and transmit the signal output from the processor 2420 through a wireless channel.
- the memory 2410 can store programs and data necessary for the operation of the base station. Additionally, the memory 2410 may store control information or data included in signals transmitted and received by the base station.
- the memory 2410 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media. Additionally, there may be multiple memories 2410. Additionally, according to one embodiment, the memory 2410 may store a program for performing the method for reporting the buffer status described above.
- an RRC containing information about the buffer size table type that each LCG can refer to from the base station receiving a radio resource control) Reconfiguration message; Identifying whether a BSR is triggered; In response to triggering of BSR, generating a BSR MAC CE (media access control control element) based on the RRC Reconfiguration message; and transmitting the BSR MAC CE to the base station, wherein the BSR MAC CE may include information indicating a buffer size table type referenced by each logical channel group (LCG).
- RRC radio resource control
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- the buffer size table type referenced by each LCG may be determined based on the buffer size of each LCG.
- the method includes receiving a UECapabilityEnquiry message from the base station inquiring whether the terminal can use a first type buffer size table; And it may further include transmitting a UECapabilityInformattion message including information on whether the terminal can use the first type buffer size table to the base station.
- Information indicating the buffer size table type may be included in the LCG ID (identification) field or the buffer size table type field in the BSR MAC CE.
- a radio resource control (RRC) message containing information about the buffer size table type that each LCG can refer to is provided to the terminal.
- RRC radio resource control
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- the buffer size table type referenced by each LCG may be determined based on the buffer size of each LCG.
- the terminal in a terminal providing a buffer status report (BSR), includes a transceiver; and at least one processor coupled to the transceiver, wherein the at least one processor includes information about a buffer size table type that each LCG from the base station can refer to.
- a radio resource control (RRC) Reconfiguration message Receives, identifies whether the BSR is triggered, generates a BSR MAC CE (media access control control element) based on the RRC Reconfiguration message in response to the triggering of the BSR, and transmits the BSR MAC CE to the base station.
- the BSR MAC CE may include information indicating the buffer size table type referenced by each logical channel group (LCG).
- LCG logical channel group
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- the buffer size table type referenced by each LCG may be determined based on the buffer size of each LCG.
- the at least one processor receives a UECapabilityEnquiry message from the base station to inquire whether the terminal can use the first type buffer size table, and inquires about whether the terminal can use the first type buffer size table to the base station.
- a UECapabilityInformation message containing information can be transmitted.
- Information indicating the buffer size table type may be included in the LCG ID (identification) field or the buffer size table type field in the BSR MAC CE.
- the base station in a base station that obtains a buffer status report (BSR), includes: a transceiver; and at least one processor coupled to the transceiver, wherein the at least one processor sends a radio resource control (RRC) Reconfiguration message to the terminal containing information about a buffer size table type that each LCG can refer to.
- RRC radio resource control
- RRC radio resource control
- the buffer size table type includes a first type buffer size table and a second type buffer size table, and the first type buffer size table and the second type buffer size table have a maximum value, minimum value, or At least one of the sections representing the amount of data corresponding to each index may be different from each other.
- a computer-readable storage medium that stores one or more programs (software modules) may be provided.
- One or more programs stored in a computer-readable storage medium are configured to be executable by one or more processors in an electronic device (configured for execution).
- One or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.
- These programs include random access memory, non-volatile memory including flash memory, read only memory (ROM), and electrically erasable programmable ROM.
- EEPROM Electrically Erasable Programmable Read Only Memory
- magnetic disc storage device Compact Disc-ROM (CD-ROM: Compact Disc-ROM), Digital Versatile Discs (DVDs), or other types of It can be stored in an optical storage device or magnetic cassette. Alternatively, it may be stored in a memory consisting of a combination of some or all of these. Additionally, a plurality of each configuration memory may be included.
- the program can be accessed through a communication network such as the Internet, Intranet, LAN (Local Area Network), WLAN (Wide LAN), or SAN (Storage Area Network), or a combination of these. It may be stored in an attachable storage device that can be accessed. This storage device can be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communications network may be connected to the device performing embodiments of the present disclosure.
- a communication network such as the Internet, Intranet, LAN (Local Area Network), WLAN (Wide LAN), or SAN (Storage Area Network), or a combination of these. It may be stored in an attachable storage device that can be accessed. This storage device can be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communications network may be connected to the device performing embodiments of the present disclosure.
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Abstract
Description
Claims (15)
- 단말의 BSR(buffer status report)을 제공하는 방법에 있어서,기지국으로부터 각각의 LCG가 참조할 수 있는 버퍼 사이즈 테이블 타입에 관한 정보를 포함하는RRC(radio resource control) Reconfiguration message를 수신하는 단계;BSR의 트리거 여부를 식별하는 단계;BSR의 트리거링에 대응하여, 상기 RRC Reconfiguration message에 기초하여 BSR MAC CE(media access control control element)를 생성하는 단계; 및상기 기지국으로 상기 BSR MAC CE를 송신하는 단계를 포함하고,상기 BSR MAC CE는 각각의 LCG(Logical channel group)가 참조하는 버퍼 사이즈 테이블 타입을 지시하는 정보를 포함하는 것인, 방법.
- 제1항에 있어서,상기 버퍼 사이즈 테이블 타입은 제1 타입 버퍼 사이즈 테이블 및 제2 타입 버퍼 사이즈 테이블을 포함하고,상기 제1 타입 버퍼 사이즈 테이블 및 상기 제2 타입 버퍼 사이즈 테이블은 버퍼 내 데이터량을 나타내는 최대값, 최소값 또는 각 인덱스에 대응하는 데이터량을 나타내는 구간 중 적어도 하나가 서로 상이한, 방법
- 제1항에 있어서,상기 각각의 LCG가 참조하는 버퍼 사이즈 테이블 타입은, 상기 각각의 LCG의 버퍼 사이즈에 기초하여 결정되는 것인, 방법.
- 제1항에 있어서, 상기 방법은,상기 기지국으로부터 단말이 제1 타입 버퍼 사이즈 테이블의 이용이 가능한지 여부를 문의하는 UECapabilityEnquiry message를 수신하는 단계; 및상기 기지국에게 단말이 제1 타입 버퍼 사이즈 테이블의 이용이 가능한지 여부에 대한 정보를 포함하는 UECapabilityInformattion message를 송신하는 단계를 더 포함하는 방법.
- 제1항에 있어서,상기 버퍼 사이즈 테이블 타입을 지시하는 정보는 상기 BSR MAC CE 내의 LCG ID(identification) 필드 또는 버퍼 사이즈 테이블 타입 필드에 포함되는 것인, 방법.
- 기지국의 BSR(buffer status report)를 획득하기 위한 방법에 있어서,단말에게 각각의 LCG가 참조할 수 있는 버퍼 사이즈 테이블 타입에 관한 정보를 포함하는RRC(radio resource control) Reconfiguration message를 송신하는 단계; 및상기 단말로부터, 상기 RRC Reconfiguration message에 기초한 BSR MAC CE(media access control control element)를 수신하는 단계를 포함하고,상기 BSR MAC CE는 각각의 LCG(Logical channel group)가 참조하는 버퍼 사이즈 테이블 타입을 지시하는 정보를 포함하는 것인, 방법.
- 제6항에 있어서,상기 버퍼 사이즈 테이블 타입은 제1 타입 버퍼 사이즈 테이블 및 제2 타입 버퍼 사이즈 테이블을 포함하고,상기 제1 타입 버퍼 사이즈 테이블 및 상기 제2 타입 버퍼 사이즈 테이블은 버퍼 내 데이터량을 나타내는 최대값, 최소값 또는 각 인덱스에 대응하는 데이터량을 나타내는 구간 중 적어도 하나가 서로 상이한, 방법.
- 제6항에 있어서,상기 각각의 LCG가 참조하는 버퍼 사이즈 테이블 타입은, 상기 각각의 LCG의 버퍼 사이즈에 기초하여 결정되는 것인, 방법.
- BSR(buffer status report)을 제공하는 단말에 있어서, 상기 단말은,송수신부; 및상기 송수신부와 결합된 적어도 하나의 프로세서를 포함하며,상기 적어도 하나의 프로세서는,기지국으로부터 각각의 LCG가 참조할 수 있는 버퍼 사이즈 테이블 타입에 관한 정보를 포함하는RRC(radio resource control) Reconfiguration message를 수신하고,BSR의 트리거 여부를 식별하고,BSR의 트리거링에 대응하여, 상기 RRC Reconfiguration message에 기초하여 BSR MAC CE(media access control control element)를 생성하고,상기 기지국으로 상기 BSR MAC CE를 송신하며,상기 BSR MAC CE는 각각의 LCG(Logical channel group)가 참조하는 버퍼 사이즈 테이블 타입을 지시하는 정보를 포함하는 것인, 단말.
- 제9항에 있어서,상기 버퍼 사이즈 테이블 타입은 제1 타입 버퍼 사이즈 테이블 및 제2 타입 버퍼 사이즈 테이블을 포함하고,상기 제1 타입 버퍼 사이즈 테이블 및 상기 제2 타입 버퍼 사이즈 테이블은 버퍼 내 데이터량을 나타내는 최대값, 최소값 또는 각 인덱스에 대응하는 데이터량을 나타내는 구간 중 적어도 하나가 서로 상이한, 단말.
- 제9항에 있어서,상기 각각의 LCG가 참조하는 버퍼 사이즈 테이블 타입은, 상기 각각의 LCG의 버퍼 사이즈에 기초하여 결정되는 것인, 단말.
- 제9항에 있어서, 상기 적어도 하나의 프로세서는,상기 기지국으로부터 단말이 제1 타입 버퍼 사이즈 테이블의 이용이 가능한지 여부를 문의하는 UECapabilityEnquiry message를 수신하고,상기 기지국에게 단말이 제1 타입 버퍼 사이즈 테이블의 이용이 가능한지 여부에 대한 정보를 포함하는 UECapabilityInformattion message를 송신하는 것인, 단말.
- 제9항에 있어서,상기 버퍼 사이즈 테이블 타입을 지시하는 정보는 상기 BSR MAC CE 내의 LCG ID(identification) 필드 또는 버퍼 사이즈 테이블 타입 필드에 포함되는 것인, 단말.
- BSR(buffer status report)를 획득하는 기지국에 있어서, 상기 기지국은,송수신부; 및상기 송수신부와 결합된 적어도 하나의 프로세서를 포함하며,상기 적어도 하나의 프로세서는,단말에게 각각의 LCG가 참조할 수 있는 버퍼 사이즈 테이블 타입에 관한 정보를 포함하는RRC(radio resource control) Reconfiguration message를 송신하고,상기 단말로부터, 상기 RRC Reconfiguration message에 기초한 BSR MAC CE(media access control control element)를 수신하며,상기 BSR MAC CE는 각각의 LCG(Logical channel group)가 참조하는 버퍼 사이즈 테이블 타입을 지시하는 정보를 포함하는 것인, 기지국.
- 제14항에 있어서,상기 버퍼 사이즈 테이블 타입은 제1 타입 버퍼 사이즈 테이블 및 제2 타입 버퍼 사이즈 테이블을 포함하고,상기 제1 타입 버퍼 사이즈 테이블 및 상기 제2 타입 버퍼 사이즈 테이블은 버퍼 내 데이터량을 나타내는 최대값, 최소값 또는 각 인덱스에 대응하는 데이터량을 나타내는 구간 중 적어도 하나가 서로 상이한, 기지국.
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| EP23886142.1A EP4601356A4 (en) | 2022-11-03 | 2023-10-27 | METHOD AND APPARATUS FOR REPORTING BUFFER STATUS IN A WIRELESS COMMUNICATION SYSTEM |
| CN202380090415.XA CN120419238A (zh) | 2022-11-03 | 2023-10-27 | 无线通信系统中缓存状态报告方法及装置 |
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| KR1020230122964A KR20240063760A (ko) | 2022-11-03 | 2023-09-15 | 무선 통신 시스템에서 버퍼 상태 보고를 위한 방법 및 장치 |
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| KR102082000B1 (ko) * | 2013-08-07 | 2020-02-26 | 주식회사 팬택 | 무선 통신 시스템에서 버퍼상태보고 전송 방법 및 장치 |
| CN112292900B (zh) * | 2018-06-21 | 2024-09-06 | 上海诺基亚贝尔股份有限公司 | 用于有限业务混合的优化bsr |
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| US12507114B2 (en) * | 2023-02-24 | 2025-12-23 | Nokia Technologies Oy | Buffer status reporting |
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| EP4601356A1 (en) | 2025-08-13 |
| EP4601356A4 (en) | 2025-12-03 |
| CN120419238A (zh) | 2025-08-01 |
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