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WO-2026095750-A1 - METHOD AND APPARATUS FOR SUPPORTING PLURALITY OF BEARERS FOR LOW-LATENCY SERVICE OF QOS FLOW IN WIRELESS COMMUNICATION SYSTEM

WO2026095750A1WO 2026095750 A1WO2026095750 A1WO 2026095750A1WO-2026095750-A1

Abstract

The present disclosure is to support a higher data transmission rate by: transmitting a UE capability information message to a base station; when the UE capability information message indicates that a multi-DRB function is supported, in which a plurality of DRBs are available for a single QoS flow, receiving configuration information for each of the plurality of DRBs from the base station via RRC signaling; when the plurality of DRBs are configured to be used for the single QoS flow via RRC signaling, using the plurality of DRBs for the single QoS flow; and when one primary DRB among the plurality of DRBs is configured to be used for the single QoS flow via RRC signaling, using a first DRB among the plurality of DRBs for the single QoS flow.

Inventors

  • SUN, WEIPING
  • KANG, HYUNJEONG

Assignees

  • 삼성전자 주식회사

Dates

Publication Date
20260507
Application Date
20251104
Priority Date
20241104

Claims (15)

  1. In a method performed by UE (user equipment) in a wireless communication system, A step of transmitting a terminal capability information message to a base station (320); Based on the terminal capability information message indicating that a Multi-DRB function is supported in which multiple DRBs are available for a single QoS (quality of service) flow, the step (325) of receiving configuration information for each of the multiple DRBs from the base station via RRC (radio resource control) signaling, wherein the configuration information for each of the multiple DRBs includes a QFI list including a QoS flow identifier (QoS flow identifier) of at least one QoS flow in which each DRB can be used; When the plurality of DRBs are configured to be used for the single QoS flow through the above RRC signaling, the step of using the plurality of DRBs for the single QoS Flow; and A method comprising the step of using a first DRB among the plurality of DRBs for a single QoS flow when the primary DRB among the plurality of DRBs is configured to be used for a single QoS flow through the above RRC signaling.
  2. In claim 1, The above RRC setting includes a threshold value for the buffer related to the first DRB, and If the size of the data stored in the buffer or the size of the data related to the single QoS flow exceeds the threshold value, the step of using the plurality of DRBs for the single QoS Flow; and If the size of the data stored in the buffer or the size of the data related to the single QoS flow is smaller than or equal to the threshold value, the method includes the step of using the first DRB among the plurality of DRBs for the single QoS Flow. A method in which the buffer comprises a buffer of a first PDCP (packet data convergence protocol) entity (210)(280) or an RLC (radio link control) entity (220)(270) associated with the first DRB.
  3. In claim 1, When receiving information from the base station, via the RRC signaling, MAC CE (medium access control control element), or DCI (downlink control information), instructing to use the plurality of DRBs for the single QoS flow, the step of using the plurality of DRBs for the single QoS flow; and A method comprising the step of using the first DRB among the plurality of DRBs for the single QoS flow when receiving information from the base station, via the RRC signaling, the MAC CE, or the DCI, instructing to use the first DRB for the single QoS flow.
  4. In claim 1, A first packet of the single QoS flow is transmitted to the SDAP (service data adaptation protocol) entity (600) by the first PDCP entity (620) associated with the first DRB among the plurality of DRBs, and A second packet of the single QoS flow is transmitted to the SDAP entity (600) by the second PDCP entity (610 or 630) associated with the second DRB among the plurality of DRBs, and Among the data related to the single QoS flow, the order of the second packet precedes the order of the first packet, and A method in which the order of the first packet and the order of the second packet are determined based on a sequence number (SN) for reordering the single QoS flow.
  5. In claim 4, Based on the fact that the first packet is delivered before the second packet is delivered to the SDAP entity (600), a timer for reordering the first packet and the second packet of the single QoS flow is started, and The size of the above timer is set through the above RRC signaling method.
  6. In a method performed by a base station in a wireless communication system, A step of receiving a terminal capability information message from a terminal (320); and Based on the terminal capability information message indicating that a Multi-DRB function is supported in which multiple DRBs are available for use for a single QoS (quality of service) flow, the method includes the step (325) of transmitting configuration information for each of the multiple DRBs to the terminal via RRC (radio resource control) signaling. The configuration information for each of the plurality of DRBs above includes a QFI list containing a QoS flow identifier (QFI) of at least one QoS flow that can be used for each DRB, and When the plurality of DRBs are configured to be used for the single QoS flow through the above RRC signaling, the plurality of DRBs are used for the single QoS Flow, and A method in which, when configured to use one primary DRB among the plurality of DRBs for the single QoS flow through the above RRC signaling, the first DRB among the plurality of DRBs is used for the single QoS flow.
  7. In claim 6, The above RRC setting includes a threshold value for the buffer related to the first DRB, and If the size of the data stored in the buffer or the size of the data related to the single QoS flow exceeds the threshold value, the plurality of DRBs are used for the single QoS Flow, and If the size of the data stored in the buffer or the size of the data related to the single QoS flow is smaller than or equal to the threshold value, the first DRB among the plurality of DRBs is used for the single QoS Flow, and A method in which the buffer comprises a buffer of a first PDCP (packet data convergence protocol) entity (210)(280) or an RLC (radio link control) entity (220)(270) associated with the first DRB.
  8. In claim 6, the method is: The method further includes the step of transmitting information to the terminal instructing it to use the plurality of DRBs for the single QoS flow via the RRC signaling, MAC CE (medium access control control element), or DCI (downlink control information), and wherein the plurality of DRBs are used for the single QoS flow, or A method further comprising the step of transmitting information from the base station, via the RRC signaling, the MAC CE, or the DCI, instructing to use the first DRB for the single QoS flow, wherein the first DRB among the plurality of DRBs is used for the single QoS flow.
  9. In claim 6, A first packet of the single QoS flow is transmitted to the SDAP (service data adaptation protocol) entity (600) by the first PDCP entity (620) associated with the first DRB among the plurality of DRBs, and A second packet of the single QoS flow is transmitted to the SDAP entity (600) by the second PDCP entity (610 or 630) associated with the second DRB among the plurality of DRBs, and Among the data related to the single QoS flow, the order of the second packet precedes the order of the first packet, and A method in which the order of the first packet and the order of the second packet are determined based on a sequence number (SN) for reordering the single QoS flow.
  10. In claim 9, Based on the fact that the first packet is delivered before the second packet is delivered to the SDAP entity (600), a timer for reordering the first packet and the second packet of the single QoS flow is started, and The size of the above timer is set through the above RRC signaling method.
  11. In a terminal (user equipment, UE), At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the terminal: Transmit a terminal capability information message to the base station, and Based on the fact that the above terminal capability information message indicates that a Multi-DRB function is supported in which multiple DRBs (data radio bearers) are available for a single QoS (quality of service) flow, configuration information for each of the multiple DRBs is received from the base station via RRC (radio resource control) signaling, and the configuration information for each of the multiple DRBs includes a QFI list containing QoS flow identifiers (QoS flow identifiers) of at least one QoS flow in which each DRB can be used. When the plurality of DRBs are configured to be used for the single QoS flow through the above RRC signaling, the plurality of DRBs are used for the single QoS Flow; and A terminal that enables the use of a first DRB among the plurality of DRBs for a single QoS flow when configured to use one primary DRB among the plurality of DRBs for a single QoS flow through the above RRC signaling.
  12. In claim 11, The above RRC setting includes a threshold value for the buffer related to the first DRB, and The above commands are the above terminal: If the size of the data stored in the buffer or the size of the data related to the single QoS flow exceeds the threshold value, the plurality of DRBs are used for the single QoS Flow, and If the size of the data stored in the buffer or the size of the data related to the single QoS flow is smaller than or equal to the threshold value, the first DRB among the plurality of DRBs is used for the single QoS Flow, and The above buffer is a terminal that includes a buffer of a first PDCP (packet data convergence protocol) entity (210)(280) or an RLC (radio link control) entity (220)(270) associated with the first DRB.
  13. In claim 11, The above commands are the above terminal: When receiving information from the base station instructing to use the plurality of DRBs for the single QoS flow via the RRC signaling, MAC CE (medium access control control element), or DCI (downlink control information), the plurality of DRBs are used for the single QoS flow, and A terminal that, upon receiving information from the base station, via the RRC signaling, the MAC CE, or the DCI, instructing to use the first DRB for the single QoS flow, uses the first DRB among the plurality of DRBs for the single QoS flow.
  14. In the case of a base station, At least one transceiver; At least one processor communicatively coupled to the above at least one transceiver; and It includes at least one memory that is communicationally coupled to the above at least one processor and stores instructions, and The above instructions are executed individually or in any combination by the above at least one processor, so that the base station: Receive a terminal capability information message from the terminal, and Based on the fact that the above terminal capability information message indicates that a Multi-DRB function is supported, in which multiple DRBs (data radio bearers) are available for a single QoS (quality of service) flow, configuration information for each of the multiple DRBs is transmitted to the terminal via RRC (radio resource control) signaling. The configuration information for each of the plurality of DRBs above includes a QFI list containing a QoS flow identifier (QFI) of at least one QoS flow that can be used for each DRB, and When the plurality of DRBs are configured to be used for the single QoS flow through the above RRC signaling, the plurality of DRBs are used for the single QoS Flow, and A base station in which, when configured to use one primary DRB among the plurality of DRBs for a single QoS flow through the above RRC signaling, the first DRB among the plurality of DRBs is used for the single QoS Flow.
  15. In claim 14, The above RRC setting includes a threshold value for the buffer related to the first DRB, and If the size of the data stored in the buffer or the size of the data related to the single QoS flow exceeds the threshold value, the plurality of DRBs are used for the single QoS Flow, and If the size of the data stored in the buffer or the size of the data related to the single QoS flow is smaller than or equal to the threshold value, the first DRB among the plurality of DRBs is used for the single QoS Flow, and The above buffer is a base station that includes a buffer of a first PDCP (packet data convergence protocol) entity (210)(280) or an RLC (radio link control) entity (220)(270) associated with the first DRB.

Description

Method and device for supporting multiple bearers for low-latency service of QOS FLOW in a wireless communication system The present disclosure relates to a technology that supports multiple bearers in a wireless communication system. 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in frequency bands below 6 GHz ('Sub 6 GHz'), such as 3.5 gigahertz (3.5 GHz), but also in ultra-high frequency bands called millimeter waves (mmWave), such as 28 GHz and 39 GHz ('Above 6 GHz'). In addition, for 6G mobile communication technology, which is referred to as a system beyond 5G, implementation in the terahertz (THX) band (e.g., the 3 terahertz band at 95 GHz) is being considered to achieve transmission speeds 50 times faster and ultra-low latency reduced to one-tenth compared to 5G mobile communication technology. In the early stages of 5G mobile communication technology, aiming to satisfy service support and performance requirements for enhanced Mobile BroadBand (eMBB), Ultra-Reliable Low-Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), technologies such as beamforming and Massive MIMO to mitigate path loss and increase transmission distance in ultra-high frequency bands, support for various numerologies (such as the operation of multiple subcarrier spacings) and dynamic operation of slot formats for the efficient utilization of ultra-high frequency resources, initial access techniques to support multi-beam transmission and broadband, definition and operation of Band-Width Parts (BWP), Low Density Parity Check (LDPC) codes for high-volume data transmission, new channel coding methods such as Polar Codes for the reliable transmission of control information, and L2 pre-processing (L2 Standardization has been carried out for pre-processing, network slicing which provides a dedicated network specialized for specific services, and other methods. Currently, discussions are underway to improve and enhance the performance of the initial 5G mobile communication technology, taking into account the services that the 5G mobile communication technology was intended to support. Additionally, physical layer standardization is in progress for technologies such as V2X (Vehicle-to-Everything), which helps autonomous vehicles make driving decisions and enhance user convenience based on their own location and status information transmitted by the vehicle; NR-U (New Radio Unlicensed), which aims for system operation in unlicensed bands that meets various regulatory requirements; NR terminal low power consumption technology (UE Power Saving); Non-Terrestrial Network (NTN), which is direct terminal-satellite communication for securing coverage in areas where communication with the terrestrial network is impossible; and positioning. In addition, standardization is underway in the field of wireless interface architecture/protocols for technologies such as the Industrial Internet of Things (IIoT) for supporting new services through linkage and convergence with other industries, Integrated Access and Backhaul (IAB) which provides nodes for expanding network service areas by integrating wireless backhaul links and access links, Mobility Enhancement including Conditional Handover and Dual Active Protocol Stack (DAPS) Handover, and 2-step Random Access (2-step RACH for NR) which simplifies random access procedures. Standardization is also underway in the field of system architecture/services for 5G baseline architectures (e.g., Service based Architecture, Service based Interface) for incorporating Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC), which provides services based on the location of the terminal. When such 5G mobile communication systems are commercialized, connected devices, which are increasing explosively, will be connected to communication networks. Accordingly, it is expected that there will be a need to enhance the functionality and performance of 5G mobile communication systems and to integrate the operation of connected devices. To this end, new research is planned to be conducted on 5G performance improvement and complexity reduction, support for AI services, support for metaverse services, and drone communication using eXtended Reality (XR), Artificial Intelligence (AI), and Machine Learning (ML) to efficiently support Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR). Furthermore, the advancement of these 5G mobile communication systems encompasses multi-antenna transmission technologies such as new waveforms to guarantee coverage in the terahertz band of 6G mobile communication technology, Full Dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas; metamaterial-based lenses and antennas to improve terahertz band signal coverage; high-dimensional spatial multiplexing technology using OAM