Method and apparatus for qoe measurement of UE in dual connectivity in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method of a UE includes receiving configuration information on a Quality of Experience (QoE) measurement from a base station, wherein the configuration information includes information indicating a Signaling Radio Bearer (SRB) for sending a report of the QoE measurement; generating a QoE report by performing a QoE measurement based on the configuration information; and transmitting the QoE report via the SRB based on the information.

Description

Technical Field

[0001] The present disclosure relates to the field of communications and operations of a user equipment (UE) and a base station. Specifically, the present disclosure relates to a method and apparatus for measuring quality of experience (QoE) of a UE in dual connectivity in a wireless communication system. Background Art

[0002] The fifth generation (5G) mobile communication technology defines a wide frequency band, making high transmission rates and new services possible, and can be implemented not only in "below 6 GHz" frequency bands such as 3.5 GHz, but also in "above 6 GHz" frequency bands called millimeter waves including 28 GHz and 39 GHz. In addition, in order to achieve a transmission rate 50 times faster than that of 5G mobile communication technology and an ultra-low latency of one-tenth of that of 5G mobile communication technology, the implementation of 6G mobile communication technology in the terahertz (THz) frequency band (e.g., 95 GHz to 3 THz frequency band) (referred to as a super 5G system) has been considered.

[0003] In the early stages of 5G mobile communications technology development, in order to support services and meet performance requirements associated with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC) and massive Machine-Type Communications (mMTC), standardization is already underway on the following: beamforming and massive MIMO for mitigating radio wave path loss and increasing radio wave transmission distance in millimeter waves; support for basic parameter sets (e.g., operating multiple subcarrier spacings) for efficient use of millimeter wave resources and dynamic operation of time slot formats; initial access technology for supporting multi-beam transmission and broadband; definition and operation of BWP (BandWidth Part); new channel coding and decoding methods such as LDPC (Low Density Parity Check) codes for large amounts of data transmission and polar codes for highly reliable transmission of control information; L2 preprocessing; and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, in view of the services that 5G mobile communication technology will support, discussions are underway on improvements and performance enhancements of initial 5G mobile communication technology, and there is already physical layer standardization on technologies such as the following: V2X (Vehicle-to-everything), for assisting driving determination of autonomous vehicles based on information about the location and status of the vehicle sent by the vehicle, and for enhancing user convenience; NR-U (New Radio Unlicensed), for system operation that complies with various regulatory requirements in unlicensed bands; NR UE energy saving; Non-Terrestrial Network (NTN), which is UE-satellite direct communication for providing coverage in areas where communication with terrestrial networks is not available; and positioning.

[0005] In addition, standardization is already underway in the air interface architecture / protocol area on technologies such as: Industrial Internet of Things (IIoT) for supporting new services through interworking and integration with other industries; IAB (Integrated Access and Backhaul) for providing nodes for network service area expansion by supporting wireless backhaul links and access links in an integrated manner; mobility enhancement, including conditional handover and DAPS (Dual Active Protocol Stack) handover; and two-step random access for simplifying the random access procedure (2-step RACH for NR). Standardization is also already underway in the system architecture / service area on the following: 5G baseline architecture (e.g., service-based architecture or service-based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies; and Mobile Edge Computing (MEC) for receiving services based on UE location.

[0006] With the commercialization of 5G mobile communication systems, the number of connected devices, which has been increasing exponentially, will be connected to the communication network, and accordingly, it is expected that enhanced functions and performance of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research related to the following items is planned: extended reality (eXtended Reality, XR) for effectively supporting AR (Augmented Reality), VR (Virtual Reality), MR (MixedReality), etc.; improving 5G performance and reducing complexity by utilizing artificial intelligence (Artificial Intelligence, AI) and machine learning (Machine Learning, ML); AI service support; metaverse service support; and drone communication.

[0007] Furthermore, such developments in 5G mobile communication systems will serve not only as a basis for developing new waveforms for providing coverage of the terahertz band for 6G mobile communication technology, multi-antenna transmission technologies (such as Full Dimensional MIMO (FD-MIMO), array antennas, and massive antennas), metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional spatial multiplexing technologies using OAM (Orbital Angular Momentum), and RIS (Reconfigurable Intelligent Surface), but also as a basis for developing full-duplex technologies for improving frequency efficiency and improving system networks for 6G mobile communication technology, AI-based communication technologies for implementing system optimization by utilizing satellites and AI (artificial intelligence) from the design stage and internalizing end-to-end AI support functions, and next-generation distributed computing technologies for implementing services with a level of complexity that exceeds the limits of UE operating capabilities by utilizing ultra-high performance communication and computing resources.

[0008] The above information is presented as background information only to assist in understanding the present disclosure. No determination has been made, and no assertion has been made, as to whether any of the above may be applicable as prior art with respect to the present disclosure. Summary of the invention

[0009] Solution to the problem

[0010] The disclosed embodiments are intended to provide an apparatus and method that can effectively provide services in a wireless communication system.

[0011] According to an embodiment of the present disclosure, a method performed by a terminal is provided. The method includes: receiving configuration information about quality of experience (QoE) measurement from a base station, wherein the configuration information includes information indicating a signaling radio bearer (SRB) for sending a report of the QoE measurement according to the configuration information; generating a QoE report by performing QoE measurement based on the configuration information; and sending the QoE report via the SRB based on the information.

[0012] According to an embodiment of the present disclosure, a method performed by a base station is provided. The method includes: sending configuration information about quality of experience (QoE) measurement to a user equipment (UE), wherein the configuration information includes information indicating a signaling radio bearer (SRB) for receiving a report of the QoE measurement according to the configuration information; and receiving a QoE report including the QoE measurement from the UE via the SRB based on the configuration information.

[0013] According to an embodiment of the present disclosure, a terminal is provided. The terminal includes: a transceiver; and a controller coupled to the transceiver and configured to: receive configuration information about quality of experience (QoE) measurement from a base station, wherein the configuration information includes information indicating a signaling radio bearer (SRB) for sending a report of the QoE measurement according to the configuration information; generate a QoE report by performing QoE measurement based on the configuration information; and send the QoE report via the SRB based on the information.

[0014] According to an embodiment of the present disclosure, a base station is provided. The base station includes: a transceiver; and a controller coupled to the transceiver and configured to: send configuration information about quality of experience (QoE) measurement to a user equipment (UE), wherein the configuration information includes information indicating a signaling radio bearer (SRB) for receiving a report of the QoE measurement according to the configuration information; and receive a QoE report including the QoE measurement from the UE via the SRB based on the configuration information.

[0015] The technical subject matter devoted to the present disclosure may not be limited to the above-mentioned technical subject matter, and other technical subject matter not mentioned may be clearly understood by those skilled in the art to which the present disclosure belongs through the following description.

[0016] The present disclosure provides an apparatus and method that can effectively provide a service in a wireless communication system.

[0017] Before proceeding to the following detailed description, it may be helpful to set forth definitions of certain words and phrases used throughout this patent document: the terms "include" and "comprising" and their derivatives mean inclusion without limitation; the term "or" is inclusive, meaning and / or; the phrases "associated with" and "associated with" and their derivatives may mean include, be included within, interconnected with, contain, be contained within, connect to or with, be coupled to or with, be communicative with, cooperate with, intertwine, juxtapose, be proximate to, be bound to or with, have, have the property of, etc.; and the term "controller" means any device, system, or portion thereof that controls at least one operation, such device may be implemented in hardware, firmware, or software, or some combination of at least two thereof. It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether local or remote.

[0018] In addition, the various functions described below may be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, procedures, functions, objects, classes, instances, related data, or parts thereof suitable for implementation with suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code, and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. "Non-transitory" computer-readable media do not include wired, wireless, optical, or other communication links that transmit temporary electrical or other signals. Non-transitory computer-readable media include media that can permanently store data and media that can store data and overwrite data later (such as rewritable optical disks or erasable memory devices).

[0019] Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other aspects, features and advantages of certain embodiments of the present disclosure will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0021] Figure 1A The structure of a next generation mobile communication system according to an embodiment of the present disclosure is shown;

[0022] Figure 1B shows a radio access state transition in a next generation mobile communication system according to an embodiment of the present disclosure;

[0023] Figure 1C A flowchart of a procedure for configuring / reporting signaling-based QoE measurements according to an embodiment of the present disclosure is shown;

[0024] Figure 1D A flowchart illustrating a procedure for configuring / reporting management-based QoE measurements according to an embodiment of the present disclosure is shown;

[0025] Figure 1E A flowchart of a procedure for configuring and reporting RAN (radio access network) visible QoE measurements according to an embodiment of the present disclosure is shown;

[0026] Figure 1F shows an SRB path in a SA scenario according to an embodiment of the present disclosure;

[0027] Figure 1G shows an SRB path in a DC scenario according to an embodiment of the present disclosure;

[0028] Figure 1H shows the internal structure of a UE according to an embodiment of the present disclosure; and

[0029] Fig. 1I The configuration of a base station according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0030] Discussed below FIG. 1A to FIG. 1I The various embodiments used to describe the principles of the present disclosure in this patent document are merely illustrative and should not be construed in any way to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any suitably arranged system or device.

[0031] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, identical or similar elements are represented by identical or similar reference numerals as much as possible. In addition, detailed descriptions of known functions or configurations that may make the subject matter of the present disclosure unclear will be omitted.

[0032] When describing the embodiments of the present disclosure, descriptions related to technical contents known in the art and not directly related to the present disclosure will be omitted. This omission of unnecessary descriptions is to prevent the main idea of ​​the present disclosure from being obscured and to convey the main idea more clearly.

[0033] For the same reason, in the accompanying drawings, some elements may be exaggerated, omitted or schematically shown. In addition, the size of each element does not fully reflect the actual size. In the drawings, the same or corresponding elements are provided with the same reference numerals.

[0034] By referring to the embodiments described in detail below in conjunction with the accompanying drawings, the advantages and features of the present disclosure and the ways to achieve them will become apparent. However, the present disclosure is not limited to the embodiments set forth below, but can be implemented in various different forms. The following embodiments are provided only to fully disclose the present disclosure and inform those skilled in the art of the scope of the present disclosure, and the present disclosure is defined only by the scope of the attached claims. Throughout the specification, the same or similar reference numerals represent the same or similar elements.

[0035] Here, it will be understood that each frame of the flowchart diagram and the frame combination in the flowchart diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device create a means for implementing the functions specified in one or more flowchart frames. These computer program instructions can also be stored in a computer-available or computer-readable memory that can instruct a computer or other programmable data processing device to operate in a particular manner, so that the instructions stored in the computer-available or computer-readable memory produce a manufactured product including the instruction means for implementing the functions specified in one or more flowchart frames. Computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are performed on a computer or other programmable device, thereby generating a computer-implemented process, so that the instructions executed on a computer or other programmable device provide steps for implementing the functions specified in one or more flowchart frames.

[0036] In addition, each frame of the flowchart diagram can represent a module, a code segment or a code portion including one or more executable instructions for implementing the specified (multiple) logical functions. It should also be noted that in some alternative implementations, the functions mentioned in the frame may not occur in order. For example, two frames shown in succession can actually be basically executed concurrently, or these frames can sometimes be executed in reverse order, depending on the functions involved.

[0037] As used herein, "unit" refers to a software element or hardware element that performs a predetermined function, such as a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC). However, "unit" does not always have a meaning limited to software or hardware. "Unit" can be constructed to be stored in an addressable storage medium or to execute one or more processors. Therefore, "unit" includes, for example, software elements, object-oriented software elements, class elements or task elements, processes, functions, attributes, programs, subroutines, program code segments, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays and parameters. The elements and functions provided by "unit" can be combined into smaller numbers of elements or "units", or divided into larger numbers of elements or "units". In addition, elements and "units" can be implemented as reproducing one or more CPUs in a secure multimedia card or device.

[0038] In the following description, a base station is an entity that allocates resources to a terminal, and may be at least one of a gNode B, an eNode B, a Node B, a base station (BS), a wireless access unit, a base station controller, and a node on a network. A terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. In the present disclosure, "downlink (DL)" refers to a radio link via which a base station sends a signal to a terminal, and "uplink (UL)" refers to a radio link via which a terminal sends a signal to a base station. In addition, in the following description, an LTE or LTE-A system may be described by way of example, but the embodiments of the present disclosure may also be applied to other communication systems having similar technical backgrounds or channel types. Examples of such communication systems may include the fifth generation mobile communication technology (5G, new radio, and NR) developed outside of LTE-A, and in the following description, "5G" may be a concept covering existing LTE, LTE-A, or other similar services. In addition, based on the determination of those skilled in the art, the embodiments of the present disclosure may also be applied to other communication systems with some modifications without significantly departing from the scope of the present disclosure.

[0039] In the following description, for the convenience of description, terms used to identify access nodes, terms related to network entities or network functions (NFs), terms related to messages, terms related to interfaces between network entities, terms related to various identification information, etc. are illustratively used. Therefore, the present disclosure is not limited to the terms used below, and other terms related to subjects having equivalent technical meanings may be used.

[0040] In the following description, for the convenience of description, some terms and names defined in the 3rd Generation Partnership Project (3GPP) Long Term Evolution (3GPP LTE) or 3GPP New Radio (3GPP NR) standards may be used. However, the present disclosure is not limited to these terms and names and can be applied to systems conforming to other standards in the same manner.

[0041] Figure 1A A structure of a next generation mobile communication system according to an embodiment of the present disclosure is shown.

[0042] refer to Figure 1A As shown in the figure, the radio access network of a wireless communication system (hereinafter referred to as a next generation mobile communication system, new radio, NR or 5G) may be composed of a next generation base station (next generation node B (hereinafter referred to as gNB)) 1a-10 and a CN (new radio core network) 1a-05. New radio user equipment (hereinafter referred to as NR UE or UE) 1a-15 may access an external network through the gNB 1a-10 and the CN 1a-05.

[0043] exist Figure 1A In the present invention, gNB may correspond to the evolved Node B (eNB) of the existing LTE system. The gNB is connected to the NR UE through a radio channel and may provide services superior to those of the existing Node B. Because all user traffic is served through a shared channel in the next generation mobile communication system, a device for scheduling by collecting status information (such as the buffer status of the UE, the available transmission power status, the channel status, etc.) may be required, and gNB 1a-10 may be responsible for this. One gNB may generally control multiple cells.

[0044] According to an embodiment of the present disclosure, compared with the existing LTE, the next generation mobile communication system can have a bandwidth greater than or equal to the existing maximum bandwidth in order to implement ultra-high-speed data transmission, and use additional beamforming technology by using orthogonal frequency division multiplexing (hereinafter referred to as OFDM) as a radio access technology. In addition, according to an embodiment of the present disclosure, the NR gNB1a-10 can apply an adaptive modulation and decoding (hereinafter referred to as AMC) scheme for determining a modulation scheme and a channel coding rate according to a channel state of a UE. CN 1a-05 (for example, an access and mobility management function (AMF) of CN) performs functions such as mobility support, bearer configuration, and QoS (quality of service) configuration.

[0045] CN 1a-05 is a device responsible for various control functions and mobility management functions of UE, and is connected to multiple base stations. In addition, the next-generation mobile communication system can be linked with the existing LTE system, and the AMF of CN 1a-05 can be connected to MME1a-25 through a network interface. The mobility management entity (MME) 1a-25 can be connected to the existing base station eNB 1a-30. A UE supporting LTE-NR dual connectivity can send and receive data while maintaining a connection with both a gNB and an eNB (1a-35).

[0046] Figure 1B A radio access state transition in a next generation mobile communication system according to an embodiment of the present disclosure is shown.

[0047] According to an embodiment of the present disclosure, the next generation mobile communication system may have three radio access states (RRC (Radio Resource Control) states). Connected mode (RRC_CONNECTED) 1b-05 may be a radio access state in which the UE can send and receive data. Idle mode (RRC_IDLE) 1b-30 may be a radio access state in which the UE monitors whether paging is sent to the UE. Connected mode and idle mode are radio access states also applied to the existing LTE system, and the detailed techniques applied to the connected mode and idle mode may be the same as those of the existing LTE system. In the next generation mobile communication system, a new inactive (RRC_INACTIVE) radio access state 1b-15 (hereinafter referred to as inactive mode) is defined. In inactive mode, the UE context may be maintained in the base station, and UE and RAN-based paging may be supported.

[0048] The characteristics of inactive mode are listed below. This is not limited to the following examples:

[0049] -Cell reselection mobility;

[0050] - A CN-NR RAN connection (both C-Plane / U-Plane) has been established for the UE;

[0051] -UE access stratum (AS) context is stored in at least one gNB and the UE;

[0052] - Paging is initiated by NR RAN;

[0053] - the RAN based notification area is managed by the NR RAN; and / or

[0054] - The NR RAN is aware of the RAN based notification area to which the UE belongs.

[0055] A UE in inactive mode can transition to connected mode or idle mode by using a specific procedure. According to the recovery process, the UE switches from inactive mode to connected mode, and can switch from connected mode to inactive mode by using a release procedure including suspension configuration information (1b-10). The procedure performed by the UE in inactive mode and the base station may include a procedure for sending and receiving one or more RRC messages between the UE and the base station, and may include one or more steps. In addition, through the recovery and release procedures, the UE can switch from inactive mode to idle mode (1b-20). The switching between connected mode and idle mode follows the existing LTE technology. That is, the switching between inactive mode and idle mode can be performed by establishing or releasing procedures (1b-25).

[0056] Figure 1C A flowchart of a procedure for configuring / reporting signaling-based QoE measurements according to an embodiment of the present disclosure is shown.

[0057] According to an embodiment of the present disclosure, the UE access layer (AS) 1c-05 may send information (e.g., qoe-Streaming-MeasReport, qoe-MTSI-MeasReport, qoe-VR-MeasReport, etc.) indicating whether QoE measurement is supported for each service type (e.g., streaming, MTSI, VR) to the base station (or NG-RAN) 1c-15 through a UE capability message (e.g., UECapabilityInformation) 1c-10.

[0058] According to an embodiment of the present disclosure, before sending the UE capability message, the base station 1c-15 may send a message (e.g., UECapabilityEnquiry) regarding a request for the UE capability message. In addition, through the UE capability message, the UE may report to the base station whether RAN visible QoE measurement (e.g., ran-VisibleQoE-Streaming-MeasReport, ran-VisibleQoE-VR-MeasReport, etc.) is supported for each service type (e.g., streaming, VR).

[0059] In addition, according to an embodiment, the UE may report whether the UL RRC segmentation (eg, ul-MeasurementReportAppLayer-Seg) for the QoE report message is supported through a UE capability message. The UE capability message may include the ASN.1 information of Table 1A and Table 1B, and the related parameters are described as follows. This is not limited to the following example.

[0060] [Table 1A]

[0061]

[0062] [Table 1B]

[0063] 4.2.20 QoE measurement parameters

[0064]

[0065] The types of services that can be supported in LTE may include streaming and multimedia telephony service (MTSI) for IP multimedia subsystem (IMS), while in NR, support for virtual reality (VR) is additionally defined in Rel-17, and multimedia broadcast multicast service (MBMS), extended reality (XR), etc. may be additionally supported in future releases. Of course, it is not limited to the above examples.

[0066] According to an embodiment of the present disclosure, operations administration and maintenance (OAM) 1c-20 provides QoE measurement configuration information (1c-30) to a core network (CN) 1c-25. The CN that receives the QoE measurement configuration information may activate QoE measurement (1c-35) by sending the configuration information to a base station. The base station that receives the QoE measurement configuration information may deliver the QoE configuration information to the UE AS (1c-40) via an RRC message (e.g., RRCReconfiguration or RRCResume message). The RRC message may include an information element (IE) as shown below (e.g., APPLayerMeasConfig), and the related parameter descriptions may be as shown in Table 2A and Table 2B.

[0067] [Table 2A]

[0068]

[0069]

[0070] [Table 2B]

[0071]

[0072]

[0073] The operation of the UE AS receiving the RRC message may be as shown in Table 2C.

[0074] [Table 2C]

[0075]

[0076]

[0077] As described above, for the QoE measurement configuration included in measConfigAppLayerToAddModList, the UEAS layer can deliver the QoE measurement configuration information to the UE upper layer or UE application layer (UE APP) 1c-45 (1c-50) through an AT command. Regarding the QoE measurement configuration included in measConfigAppLayerToAddReleaseList, the UE AS layer can send an AT command to the UE APP to delete the saved configuration information.

[0078] The UE APP (1c-45) may perform QoE measurement according to the received QoE measurement configuration information. In addition, the measurement result may be reported to the UE AS through an AT command according to the QoE measurement configuration information (1c-55). The UE AS that receives the measurement result may report the measurement result to the base station (1c-60) through an RRC message (e.g., a MeasurementReportAppLayer message). The QoE measurement result may be reported using SRB4. The MeasurementReportAppLayer message may include the ASN.1 information of Table 3, and the related parameters are described in Table 3A below.

[0079] [Table 3A]

[0080]

[0081]

[0082] [Table 3B]

[0083]

[0084] The specific procedure of UE AS for reporting RRC messages may be as shown in Table 3C below.

[0085] Table 3C

[0086]

[0087]

[0088] The base station may deliver the measurement result report to the final server (Trace Collection Entity (TCE) or Measurement Collection Entity (MCE) 1c-65) (1c-70) that collects the measurement report.

[0089] Figure 1D A flow chart of a procedure for configuring / reporting management-based QoE measurements according to an embodiment of the present disclosure is shown.

[0090] The management-based QoE configuration / reporting procedure is essentially similar to the signaling-based procedure ( Figure 1C ). Accordingly, in the present disclosure, only the differences between the management-based methods are described below, and other procedures and descriptions may correspond to Figure 1C Description.

[0091] According to an embodiment of the present disclosure, in a management-based method, OAM 1d-05 may send a QoE measurement configuration directly to the base station 1d-10 without passing through the CN to activate QoE measurement (1d-15). Upon receiving the QoE measurement configuration, the base station 1d-10 may search for a single UE or multiple UEs that meet various conditions (e.g., area range, application layer capabilities, and service types). The base station may deliver the QoE measurement configuration to each UE via an RRC message (e.g., RRCReconfiguration or RRCResume) (1d-20). Other procedures and message types may be considered similar to Figure 1C The description of (signaling-based method) is the same.

[0092] Figure 1E A flow chart of a procedure for configuring and reporting RAN-visible QoE measurements according to an embodiment of the present disclosure is shown.

[0093] Figure 1C and Figure 1D The QoE measurement described in is configured by OAM, and the corresponding QoE measurement report generated is collected by TCE / MCE, so that the operator can use the QoE measurement report for network optimization. When the UE sends a report on OAM-based QoE measurement to the base station and the base station receives the report, the base station may not be able to read or understand the measurement report.

[0094] The MeasurementReportAppLayer message includes a measurement report generated by the UE's application layer in the measurementReportAppLayerContainer, but because the measurement report is stored in the OCTEC STRING format, the measurement report may not be read or understood by the base station or the RRC layer of the base station. To solve this problem, RAN visible QoE (RVQoE) measurements are defined and introduced in 3GPP so that the base station reads the QoE measurement report and uses it for network optimization, such as radio resource management. RVQoE measurements can be defined to be limited to specific service types (e.g., streaming, VR).

[0095] According to an embodiment, first, the UE may report to the base station whether the RVQoE measurement is supported by the service type (e.g., streaming, VR) (1e-05). In this case, the UECapabilityInformation message may be used. For example, for streaming services, the UE may include or configure the ran-VisibleQoE-Streaming-MeasReport parameter in the UECapabilityInformation message, and for VR services, the UE may include or configure the ran-VisibleQoE-VR-MeasReport parameter. Thus, the base station may determine whether the UE supports RVQoE measurement for each service type, and accordingly, the base station may generate an RVQoE measurement configuration and send it to the UE (1e-10). In this case, the RVQoE measurement configuration may be delivered together with the OAM-based QoE measurement configuration. The RVQoE measurement configuration may be included in an RRCReconfiguration or RRCResume message. The base station may instruct the UE to establish or release the RVQoE measurement by establishing or releasing the ran-VisibleParameters in the AppLayerMeasConfig IE.

[0096] The RAN-VisibleParameters may include the RAN-VisibleParameters IE, through which the base station may provide some or all of the following parameters to the UE. This is not limited to the following examples:

[0097] - RVQoE measurement reporting period (ran-VisiblePeriodicity): UE AS or UE APP can send RVQoE measurement reports in each measurement reporting period;

[0098] - Number of buffer levels that can be reported (numberOfBufferLevelEntries): When reporting RVQoE measurements, the UE AS or UE APP may include multiple buffer levels, and the number of buffer levels that may be included may be less than the numberOfBufferLevelEntries value; and / or

[0099] -Whether to report the playout delay when the media starts (reportPlayoutDelayForMediaStartup): When the reportPlayoutDelayForMediaStartup value is indicated as true, the UE AS or UE APP may send the playout delay by including the playout delay when the media starts in the RVQoE report. When the reportPlayoutDelayForMediaStartup value is indicated as false, the UE may not include the playout delay when the media starts in the RVQoE report.

[0100] The AS layer of the UE may send the configuration information to the APP layer of the UE (1e-15). In this case, the RVQoE measurement configuration may be delivered together with the OAM-based QoE measurement configuration. The APP of the UE may perform QoE measurement based on the RVQoE measurement configuration information, generate an RVQoE measurement report, and send the report to the AS layer of the UE (1e-20).

[0101] According to an embodiment of the present disclosure, the RVQoE measurement report may be delivered together with the OAM-based QoE measurement report. The AS layer of the UE that receives the RVQoE measurement report may deliver the RVQoE measurement report to the base station (1e-25). In this case, the RVQoE measurement report may be delivered together with the OAM-based QoE measurement report.

[0102] In 1e-25, the RVQoE measurement report may be sent via the RAN-VisibleMeasurements IE in the MeasurementReportAppLayer message, and the RAN-VisibleMeasurements IE may include some or all of the following parameters. This is not limited to the following examples:

[0103] - APP layer buffer level list (appLayerBufferLevelList): This can include multiple buffer levels measured by the UE APP. The number included in numberOfBufferLevelEntries during RVQoE configuration may be limited;

[0104] - Playout Delay (playoutDelayForMediaStartup): This may indicate the playout delay in ms when the media starts. When reportPlayoutDelayForMediaStartup is configured as true during RVQoE configuration, the UE may include the playoutDelayForMediaStartup parameter; and / or

[0105] -PDU (Protocol Data Unit) Session ID List (pdu-SessionIdList): pdu-SessionIdList can indicate the (multiple) PDU sessions used in the application data flow that is the RVQoE measurement target. The base station can know for which (which) PDU session the RVQoE value (e.g., buffer level and playout delay) is measured through pdu-SessionIdList, and can optimize the resource allocation and scheduling for the corresponding (multiple) PDU sessions accordingly.

[0106] The base station can read the RVQoE report and use it to perform network optimization. For example, the QoE of a UE that is experiencing poor QoE for a particular service can be improved by allocating a larger amount of radio resources.

[0107] Figure 1F An SRB path in a SA scenario according to an embodiment of the present disclosure is shown.

[0108] The UE can be connected to the network in the SA (Standalone) state. That is, the UE 1f-05 can communicate with one base station 1f-10. In this case, a signaling radio bearer (SRB) can be defined / used to transmit RRC messages or NAS messages between the base station and the UE. In the SA state, SRB0, SRB1, SRB2, and SRB4 can be configured / used. Among these, SRB4 can be used to send the UE's QoE measurement report message (or App layer measurement report message).

[0109] Figure 1G An SRB path in a DC scenario according to an embodiment of the present disclosure is shown.

[0110] The UE can be connected to the network in a DC (e.g., NR-DC) state. That is, the UE 1g-05 can communicate with two base stations 1g-10 and 1g-15 at the same time. Each base station can be referred to as a master node (MN) 1g-10 and a secondary node (SN) 1g-15. In this case, a signaling radio bearer (SRB) can be defined / used to transmit RRC messages or NAS messages between the base station and the UE. SRB0, SRB1, SRB2, and SRB4 can be configured / used for communicating with the MN. Among these, SRB4 can be used to send a QoE measurement report message (or App layer measurement report message) of the UE. Among these, SRB1 and SRB2 can be configured as a diversion SRB 1g-20, and the diversion SRB can support communication between the UE and the MN through the RRC / PDCP layer of the MN and the RLC / MAC / PHY layer of the SN. The base station can configure an SRB path for communicating with the UE by using the diversion SRB. It is possible to configure whether to use the RLC / MAC / PHY layer of the MN, the RLC / MAC / PHY layer of the SN, or both. When both are used (i.e., repeated), the reliability of message transmission can be increased by redundant transmission. On the other hand, SRB3 can be configured / used for communication between the UE and the SN.

[0111] To support QoE measurement in NR-DC state, 3GPP Release 18 QoE includes the following information:

[0112] -Specify support for QoE in NR-DC, e.g., enable QoE reporting via SN;

[0113] --Specify QoE configuration and measurement reporting through MN / SN for NR-DC architecture, and specify QoE measurement reporting through another DC leg to maintain reporting continuity;

[0114] NOTE 1: QoE measurements are not performed for each branch individually.

[0115] --Support RAN visible QoE and radio related measurement configuration and reporting in NR-DC scenarios;

[0116] -- specify QoE measurement continuity in mobility scenarios in NR-DC; and / or

[0117] --Specify the alignment of QoE measurements in NR-DC (including traditional QoE measurements and RAN-visible QoE measurements) with radio-related measurements.

[0118] Accordingly, the 3GPP RAN2 Working Group and the 3GPP RAN3 Working Group are discussing and have reached the following agreement on QoE measurement reporting for NR-DC UEs:

[0119] - Standard conference RAN3#117bis-e protocol;

[0120] -- In DC, the UE switches the reporting branch based on the indication from the network, whether FFS (for further study) is implicit or explicit,

[0121] -- The agreement stated by the WA is "If the SN receives a QoE report, then the SN can forward the QoE report directly to the MCE",

[0122] -- The MN may receive RVQoE reports directly from the UE, and / or

[0123] --The SN may receive RVQoE reports directly from the UE; and / or

[0124] - Standard conference RAN2#119bis-e protocol.

[0125] --Use SRB4 as the baseline for Rel-18 QoE.

[0126] Accordingly, the UE may need to configure SRBs with the SN and the MN to send a QoE measurement report message. The UE may use SRB4 to send a QoE measurement report message to the MN (RRC layer of the MN). Alternatively, the UE may define / use a diverted SRB4 to send a QoE measurement report message to the MN (RRC layer of the MN). That is, the QoE measurement report message may be delivered to the PDCP / RRC layer of the MN through the PHY / MAC / RLC layer of the SN. Alternatively, the UE may use SRB3 to send a QoE measurement report message to the SN (RRC layer of the SN). According to an embodiment, the QoE measurement report may be a message used to optimize network operation but is not necessary for network operation, so the QoE measurement report message may be a message with a lower priority than the RRC message traditionally sent through SRB3. Accordingly, a new SRB (e.g., SRB5 with a lower priority than SRB3) may be defined / used to send a QoE measurement report message to the SN (RRC layer of the SN). Like SRB3, SRB5 can connect to the RRC layer of the SN through the PHY / MAC / RLC / PDCP layer of the SN.

[0127] According to an embodiment, in order to receive QoE configuration information from MN (RRC layer of MN), UE may configure and use SRB1 (or offload SRB1). In order to receive QoE configuration information from SN (RRC layer of SN), UE may configure and use SRB3. Alternatively, UE may receive QoE configuration information (including SN QoE configuration information) in the form of SN message in SRB1 message.

[0128] According to the above standard conference agreement, the UE in the NR-DC state may receive an indication of a reporting branch for the QoE measurement report from the network. According to an embodiment, the reporting branch may refer to a path for the QoE measurement report (a path for whether to send to the MN or the SN).

[0129] According to an embodiment of the present disclosure, when the UE receives a QoE configuration from the MN (or the RRC layer of the MN) (e.g., via RRCReconfiguration or appLayerMeasconfig in RRCResume) (or through an SRB used / defined in the QoE configuration of the MN, such as SRB1 or split SRB1), the default reporting branch of the UE may be the MN. When the MN sends the QoE configuration, a first indicator may be defined (e.g., in appLayerMeasconfig) to indicate a reporting branch to the SN.

[0130] According to an embodiment, when the first indicator indicating the reporting branch to the SN is configured as true or present, the UE may send a QoE measurement report to the SN (RRC layer of the SN), and send the QoE measurement report through an SRB defined / used for the QoE measurement report to the SN (e.g., SRB3, SRB5). Conversely, when the indicator is configured as false or absent, the UE may send the QoE measurement report to the default reporting branch (i.e., MN (RRC layer of the MN)), and send the QoE measurement report through an SRB defined / used for the QoE measurement report to the MN (e.g., SRB4, offload SRB4).

[0131] According to an embodiment of the present disclosure, when the UE receives a QoE configuration from the SN (or the RRC layer of the SN) (e.g., via appLayerMeasconfig in RRCReconfiguration or RRCResume) (or via an SRB used / defined in the QoE configuration of the SN, such as SRB3), the default reporting branch of the UE may be the SN. When the SN sends the QoE configuration, a second indicator may be defined (e.g., in appLayerMeasconfig) to indicate a reporting branch to the MN.

[0132] According to an embodiment, when the second indicator indicating the reporting branch to the MN is configured as true or present, the UE may send a QoE measurement report to the MN (RRC layer of the MN), and send the QoE measurement report through an SRB (e.g., SRB4) defined / used for the QoE measurement report to the MN. On the contrary, when the indicator is configured as false or absent, the UE may send the QoE measurement report to the default reporting branch (i.e., the SN (RRC layer of the SN)), and send the QoE measurement report through an SRB (e.g., SRB3, SRB5) defined / used for the QoE measurement report to the SN.

[0133] According to an embodiment of the present disclosure, a parameter may be defined for the first indicator and the second indicator (for example, in appLayerMeasconfig). That is, the parameter sent by the MN (in appLayerMeasconfig) may refer to the first indicator, and the parameter sent by the SN (in appLayerMeasconfig) may refer to the second indicator.

[0134] According to an embodiment of the present disclosure, no matter which base station (MN or SN) the UE receives the QoE configuration information from, a third indicator (which may indicate MN or SB) may be defined in the QoE configuration information (e.g., appLayerMeasconfig). When the third indicator is configured as MN, the UE may send a QoE measurement report to the MN (RRC layer of the MN), and the QoE measurement report may be sent through an SRB (e.g., SRB4) defined / used for the QoE measurement report to the MN. When the third indicator is configured as SN, the UE may send a QoE measurement report to the SN (RRC layer of the SN), and the QoE measurement report may be sent through an SRB (e.g., SRB4) defined / used for the QoE measurement report to the SN.

[0135] According to an embodiment of the present disclosure, a UE may have multiple (independent) QoE configurations, and accordingly, a QoE measurement configuration ID may be used to independently perform multiple QoE measurements and distinguish the corresponding generated QoE report information. For example, a base station may configure three pieces of QoE configuration information to a UE, and may indicate a first configuration information ID (e.g., measConfigAppLayerId=1), a second configuration information ID (e.g., measConfigAppLayerId=2), and a third configuration information ID (e.g., measConfigAppLayerId=3).

[0136] The UE may perform measurement through each QoE configuration information, map the corresponding generated QoE measurement report information with the corresponding QoE configuration ID, and report the mapped information to the base station. A QoE measurement report message may include an indication of measConfigAppLayerId=1 and a corresponding measurement report result, may include an indication of measConfigAppLayerId=2 and a corresponding measurement report result, and may include an indication of measConfigAppLayerId=3 and a corresponding measurement report result. Of course, it is not limited to the above examples.

[0137] According to an embodiment of the present disclosure, a reporting branch may be configured for each QoE measurement configuration ID (e.g., measConfigAppLayerId). A base station, OAM, or CN may need to send a measurement report to other base stations for each QoE configuration. For example, the MN may need to include the RVQoE configuration generated by the MN in the measurement configuration information of measConfigAppLayerId=1, and directly receive (without passing through the MN) a measurement report on the RVQoE configuration. On the other hand, the SN may need to include the RVQoE configuration generated by the SN in the measurement configuration information of measConfigAppLayerId=2, and directly receive (without passing through the MN) a measurement report on the RVQoE configuration. Alternatively, the MN and the SN may coordinate where to place a reporting branch for each QoE configuration. Alternatively, the OAM or CN may indicate where to place a reporting branch for each QoE configuration.

[0138] For this purpose, the configuration of the reporting branch (e.g., the first indicator, the second indicator, or the third indicator) may be configured for each QoE measurement configuration ID (e.g., measConfigAppLayerId), and accordingly, the UE may select a different reporting branch for each QoE measurement configuration and send a QoE measurement report. For example, the UE may be instructed to send a QoE measurement report corresponding to the configuration of measConfigAppLayerId=1 to the SN (via the first indication, the second indication, or the third indication corresponding to measConfigAppLayerId=1), and may send a QoE measurement report of measConfigAppLayerId=1 to the SN (RRC layer of the SN), and may send the QoE measurement report through an SRB (e.g., SRB4) defined / used for QoE measurement reporting to the SN. At the same time, the UE may be instructed to send a QoE measurement report corresponding to the configuration of measConfigAppLayerId=2 to the MN (via the first indication, the second indication, or the third indication corresponding to measConfigAppLayerId=2), and may send a QoE measurement report of measConfigAppLayerId=2 to the MN (RRC layer of the MN), and may send the QoE measurement report via an SRB (e.g., SRB4) defined / used for the QoE measurement report to the MN.

[0139] According to an embodiment of the present disclosure, the UE may generate one QoE measurement report message (e.g., MeasurementReportAppLayer) by collecting only the QoE measurement reports for multiple QoE configuration IDs indicated to be sent to the MN, and send the QoE measurement report through an SRB (e.g., SRB4) defined / used for the QoE measurement report to the MN. In addition, the UE may generate another QoE measurement report message (e.g., MeasurementReportAppLayer) by collecting only the QoE measurement reports for multiple QoE configuration IDs indicated to be sent to the SN, and send the QoE measurement report through an SRB (e.g., SRB3 or SRB5) defined / used for the QoE measurement report to the SN.

[0140] According to an embodiment of the present disclosure, the UE may select a reporting branch for a QoE measurement report according to an SRB configuration received from a base station. If an SRB defined / used for a QoE measurement report to a MN is configured (e.g., SRB4), the UE may send a QoE measurement report to the MN (or only send a QoE measurement report corresponding to a measConfigAppLayerId that may be sent to the MN). If an SRB defined / used for a QoE measurement report to a SN is configured (e.g., SRB3 or SRB5), the UE may send a QoE measurement report to the SN (or only send a QoE measurement report corresponding to a measConfigAppLayerId that may be sent to the SN). If SRBs for both the MN and the SN are configured, the UE may select and send the SRB in one of the two directions.

[0141] According to an embodiment of the present disclosure, the UE may send a corresponding QoE measurement report to a base station (MN or SN) that has received a QoE configuration. If the UE receives QoE measurement information from the MN (or if the QoE configuration is received from the MN through an SRB for QoE configuration (e.g., SRB1)), the UE may send a corresponding measurement report to the MN. For example, if a QoE configuration of measConfigAppLayerId=1,3 is received from the MN, the UE may send a measurement report generated in the case of measConfigAppLayerId=1,3 to the MN. Conversely, if the UE receives QoE measurement information from the SN (or if the QoE configuration is received from the SN through an SRB for QoE configuration (e.g., SRB3)), the UE may send a corresponding measurement report to the SN. For example, if a QoE configuration of measConfigAppLayerId=2,4 is received from the SN, the UE may send a measurement report generated in the case of measConfigAppLayerId=2,4 to the SN.

[0142] According to an embodiment of the present disclosure, when the UE is instructed to report QoE measurements to the MN, but the UE is unable to send the QoE measurement report (for example, when the corresponding SRB is not configured, in the case of MCG failure, in the case of MN overload (for example, when pauseReporting from the MN is configured as true), etc.), the UE may send a QoE measurement report to the SN. In order to allow the operation of the UE (change of the UE's own reporting branch), an indicator (for example, a fourth indicator) from the base station may be included in the QoE configuration information. When the fourth indicator is included or configured as true, the UE may perform a QoE measurement report to the SN even if the measurement report to the MN is configured. When the fourth indicator is omitted or configured as false, the UE is unable to send a measurement report to the MN to the SN, and may store the measurement report to the MN (for later transmission) or discard the measurement report to the MN (to save memory). When the UE performs QoE measurement reporting to the SN even if the measurement reporting to the MN is configured, an indicator (fifth indicator) that the measurement report can be delivered to the MN may be defined / included in the QoE measurement report message. When the UE includes the fifth indicator or indicates that the indicator is true, this may mean that it is a QoE measurement report originally directed to the MN, and the SN may forward the corresponding report to the MN. When the UE omits the fifth indicator or indicates that the indicator is false, this may mean that it is a QoE measurement report originally directed to the SN, and the SN may not forward the corresponding report to the MN.

[0143] According to an embodiment of the present disclosure, when the UE is instructed to report QoE measurements to the SN, but the UE is unable to send the QoE measurement report (for example, when the corresponding SRB is not configured, in the case of SCG failure, in the case of SN overload (for example, when pauseReporting from the SN is configured as true), etc.), the UE may send a QoE measurement report to the MN. In order to allow the operation of the UE (change of the UE's own reporting branch), an indicator (for example, the sixth indicator) from the base station may be included in the QoE configuration information. When the sixth indicator is included or configured as true, the UE may perform a QoE measurement report to the MN even if the measurement report to the SN is configured. When the sixth indicator is omitted or configured as false, the UE is unable to send a measurement report to the SN to the MN, and may store the measurement report to the SN (for later transmission) or discard the measurement report to the SN (to save memory).

[0144] When the UE performs QoE measurement reporting to the MN even if the measurement reporting to the SN is configured, an indicator (seventh indicator) that the measurement report can be delivered to the SN may be defined / included in the QoE measurement report message. When the UE includes the seventh indicator or indicates that the indicator is true, this may mean that it is a QoE measurement report originally directed to the SN, and the MN may forward the corresponding report to the SN. When the UE omits the seventh indicator or indicates that the indicator is false, this may mean that it is a QoE measurement report originally directed to the MN, and the MN may not forward the corresponding report to the SN.

[0145] In an embodiment of the present disclosure, the fourth indicator and the sixth indicator may be defined as one common parameter (ie, an indicator that allows a QoE measurement report to a branch different from a configured branch).

[0146] In the embodiment of the present disclosure, the fifth indicator and the seventh indicator may be defined as one common parameter (ie, a parameter indicating that the QoE measurement report points to a branch opposite to the receiving base station).

[0147] According to an embodiment of the present disclosure, when the UE receives a conventional pauseResume indicator as true from the MN (or from the MN via an SRB configured for QoE (e.g., SRB1)), the UE may perform a QoE measurement report to the SN or to the SN via an SRB (e.g., SRB3 or SRB5). When the UE has never received a pauseResume indicator as false from the MN (or from the MN via an SRB configured for QoE (e.g., SRB1)) or has never configured the pauseResume indicator as false, the UE may perform a QoE measurement report to the MN or to the MN via an SRB (e.g., SRB4). This embodiment has the advantage of reusing conventional indicators.

[0148] According to an embodiment of the present disclosure, when the UE receives a traditional pauseResume indicator as true from the SN (or from the SN via an SRB configured for QoE (e.g., SRB3)), the UE may perform a QoE measurement report to the MN or to the MN via an SRB (e.g., SRB3 or SRB5). When the UE has never received a pauseResume indicator as false from the SN (or from the MN via an SRB configured for QoE (e.g., SRB1)) or has never configured the pauseResume indicator as false, the UE may perform a QoE measurement report to the SN or to the SN via an SRB (e.g., SRB4). This embodiment has the advantage of reusing the traditional indicator.

[0149] According to an embodiment of the present disclosure, an indicator (eighth indicator) indicating whether the UE supports QoE measurement (and / or configuration, and / or reporting) in NR-DC may be defined in a UE capability message (e.g., 1c-10). If the UE supports QoE measurement (and / or configuration, and / or reporting) in NR-DC, the eighth indicator may be included in the UE capability message or the eighth indicator may be configured to true. On the contrary, if the UE does not support QoE measurement (and / or configuration, and / or reporting) in NR-DC, the eighth indicator may be omitted in the UE capability message or the eighth indicator may be configured to false.

[0150] According to an embodiment of the present disclosure, an indicator (ninth indicator) indicating whether the UE supports changing the reporting branch for QoE measurement in NR-DC may be defined in a UE capability message (e.g., 1c-10). If the UE supports changing the reporting branch in NR-DC, the ninth indicator may be included in the UE capability message or configured as true. On the contrary, if the UE does not support changing the reporting branch in NR-DC, the ninth indicator may be omitted in the UE capability message or configured as false.

[0151] Although the embodiments of the present disclosure are written assuming NR-DC, they can be applied to various types of DC situations by using the same method.

[0152] Figure 1H The internal structure of the UE according to an embodiment of the present disclosure is shown.

[0153] refer to Figure 1H , the UE includes a radio frequency (RF) processor 1h-10, a baseband processor 1h-20, a storage device 1h-30, and a controller 1h-40. Of course, it is not limited to the above example, and the UE may include more Figure 1H More or less configurations as shown in .

[0154] The RF processor 1h-10 performs functions for sending and receiving signals through a radio channel, such as frequency band conversion and amplification of signals. That is, the RF processor 1h-10 up-converts the baseband signal provided by the baseband processor 1h-20 to an RF band signal, sends the RF band signal through an antenna, and down-converts the RF band signal received by the antenna to a baseband signal. For example, the RF processor 1h-10 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital to analog converter (DAC), an analog to digital converter (ADC), and the like. In this figure, only one antenna is shown, but the UE may include multiple antennas. In addition, the RF processor 1h-10 may include multiple RF chains. In addition, the RF processor 1h-10 may perform beamforming. For beamforming, the RF processor 1h-10 may adjust the phase and amplitude of each signal sent and received through multiple antennas or antenna elements. In addition, the RF processor may perform MIMO, and may receive multiple layers when performing MIMO operations.

[0155] The baseband processor 1h-20 can perform the function of converting between the baseband signal and the bit stream according to the physical layer standard of the system. For example, when sending data, the baseband processor 1h-20 can generate complex symbols by encoding and modulating the transmitted bit stream. In addition, when receiving data, the baseband processor 1h-20 can restore the received bit stream by demodulating and decoding the baseband signal provided from the RF processor 1h-10. For example, in the case of following the orthogonal frequency division multiplexing (OFDM) scheme, when sending data, the baseband processor 1h-20 can generate complex symbols by encoding and modulating the transmitted bit stream, mapping the complex symbols to subcarriers, and then configuring OFDM symbols through inverse fast Fourier transform (IFFT) operation and cyclic prefix (CP) insertion. In addition, when receiving data, the baseband processor 1h-20 divides the baseband signal provided from the RF processor 1h-10 into OFDM symbol units, restores the signal mapped to the subcarrier through a fast Fourier transform (FFT) operation, and then restores the received bit stream through demodulation and decoding.

[0156] The baseband processor 1h-20 and the RF processor 1h-10 send and receive signals as described above. Accordingly, the baseband processor 1h-20 and the RF processor 1h-10 may be referred to as a transmitter, a receiver, a transceiver, or a communicator. In addition, at least one of the baseband processor 1h-20 and the RF processor 1h-10 may include a plurality of communication modules to support a variety of different radio access technologies. In addition, at least one of the baseband processor 1h-20 and the RF processor 1h-10 may include different communication modules to process signals of different frequency bands. For example, different radio access technologies may include wireless LAN (e.g., IEEE802.11), cellular networks (e.g., LTE), and the like. In addition, different frequency bands may include super high frequency (SHF) (e.g., 2.NRHz, NRHz) bands and millimeter wave (e.g., 60 GHz) bands.

[0157] The storage device 1h-30 stores data such as basic programs, applications, and configuration information for the operation of the UE. Specifically, the storage device 1h-30 can store information related to a second access node that performs wireless communication by using a second radio access technology. In addition, the storage device 1h-30 can provide the stored data according to the request of the controller 1h-40. The storage device 1h-30 can store a program for executing the above-mentioned method for measuring the QoE of the dual-access UE.

[0158] The controller 1h-40 controls the overall operation of the UE. For example, the controller 1h-40 sends and receives signals through the baseband processor 1h-20 and the RF processor 1h-10. In addition, the controller 1h-40 writes data in the storage device 1h-40 and reads data. To this end, the controller 1h-40 may include at least one processor. For example, the controller 1h-40 may include a communication processor (CP) that controls communication and an application processor (AP) that controls an upper layer (such as an application). In addition, according to an embodiment of the present disclosure, the controller 1h-40 may include a multi-connection processor 1h-42 that performs processing to operate in a multi-connection mode. The controller 1h-40 can control the overall operation of the UE to perform the above-mentioned method related to QoE measurement of dual-access UE.

[0159] Fig. 1I The configuration of a base station according to an embodiment of the present disclosure is shown.

[0160] like Fig. 1IAs shown, the base station includes a radio frequency (RF) processor 1i-10, a baseband processor 1i-20, a backhaul communication circuit 1i-30, a storage device 1i-40, and a controller 1i-50. Of course, it is not limited to the above example, and the base station may include more Fig. 1I The configurations shown may be more or less than those shown.

[0161] The RF processor 1i-10 performs functions for sending and receiving signals through a radio channel, such as frequency band conversion and amplification of signals. That is, the RF processor 1i-10 up-converts the baseband signal provided by the baseband processor 1i-20 to an RF band signal, sends the RF band signal through an antenna, and down-converts the RF band signal received by the antenna to a baseband signal. For example, the RF processor 1i-10 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), and the like. In this figure, only one antenna is shown, but the base station may include multiple antennas. In addition, the RF processor 1i-10 may include multiple RF chains. In addition, the RF processor 1i-10 may perform beamforming. For beamforming, the RF processor 1i-10 may adjust the phase and amplitude of each signal sent and received through multiple antennas or antenna elements. The RF processor may perform downlink MIMO operations by sending one or more layers.

[0162] The baseband processor 1i-20 can perform the function of converting between the baseband signal and the bit stream according to the physical layer standard of the system. For example, when sending data, the baseband processor 1i-20 can generate complex symbols by encoding and modulating the transmitted bit stream. In addition, when receiving data, the baseband processor 1i-20 can restore the received bit stream by demodulating and decoding the baseband signal provided from the RF processor 1h-10. For example, in the case of following the orthogonal frequency division multiplexing (OFDM) scheme, when sending data, the baseband processor 1i-20 can generate complex symbols by encoding and modulating the transmitted bit stream, mapping the complex symbols to subcarriers, and then configuring OFDM symbols through inverse fast Fourier transform (IFFT) operations and cyclic prefix (CP) insertion. In addition, when receiving data, the baseband processor 1h-20 can divide the baseband signal provided from the RF processor 1i-10 into OFDM symbol units, restore the signal mapped to the subcarrier through a fast Fourier transform (FFT) operation, and then restore the received bit stream through demodulation and decoding. The baseband processor 1i-20 and the RF processor 1i-10 can send and receive signals as described above. Therefore, the baseband processor 1h-20 and the RF processor 1i-10 can be referred to as a transmitter, a receiver, a transceiver, or a communicator.

[0163] The backhaul communication circuit 1i-30 may provide an interface for performing communication with other nodes in the network. That is, the backhaul communication circuit 1i-30 may convert a bit stream sent from the main base station to another node (e.g., an auxiliary base station, a core network, etc.) into a physical signal, and convert a physical signal received from another node into a bit stream.

[0164] The storage device 1i-40 can store data such as basic programs, applications, and configuration information for the operation of the base station. Specifically, the storage device 1i-40 can store information about the bearer allocated to the accessed UE, the measurement results reported from the accessed UE, etc. In addition, the storage device 1i-40 can store information used as a criterion for determining whether to provide multiple accesses to the UE or to suspend multiple accesses. In addition, the storage device 1i-40 can provide the stored data according to the request of the controller 1i-50. The storage device 1i-40 can store a program for executing the above-mentioned method for measuring the QoE of the dual-access UE.

[0165] The controller 1i-50 controls the overall operation of the base station. For example, the controller 1i-50 can send and receive signals through the baseband processor 1i-20 and the RF processor 1i-10. In addition, the controller 1i-50 writes data in the storage device 1i-40 and reads data. To this end, the controller 1i-50 may include at least one processor. In addition, according to an embodiment of the present disclosure, the controller 1i-50 may include a multi-connection processor 1i-52 that performs processing to operate in a multi-connection mode. The controller 1i-50 can control the overall operation of the base station to perform the above-mentioned method related to QoE measurement of dual-access UE.

[0166] The methods according to various embodiments described in the claims or specification of the present disclosure may be implemented by hardware, software, or a combination of hardware and software.

[0167] When these methods are implemented by software, a computer-readable storage medium for storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium may be configured to be executed by one or more processors within an electronic device. At least one program may include instructions that cause an electronic device to perform methods according to various embodiments of the present disclosure as defined in the appended claims and / or disclosed herein.

[0168] The program (software module or software) may be stored in a non-volatile memory (including random access memory and flash memory, read-only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disk storage device, compact disk-ROM (CD-ROM), digital versatile disk (DVD)) or other types of optical storage devices, or cassette tapes. Alternatively, any combination of some or all of them may form a memory in which the program is stored. In addition, a plurality of such memories may be included in the electronic device.

[0169] In addition, the program can be stored in an attachable storage device that can access the electronic device through a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WLAN), and a storage area network (SAN) or a combination thereof. Such a storage device can access the electronic device via an external port. In addition, a separate storage device on a communication network can access the portable electronic device.

[0170] In the above detailed embodiments of the present disclosure, the elements included in the present disclosure are expressed in the singular or plural, depending on the detailed embodiments presented. However, for ease of description, the singular form or plural form is appropriately selected for the presented situation, and the present disclosure is not limited to elements expressed in the singular or plural. Therefore, an element expressed in the plural may also include a single element, or an element expressed in the singular may also include multiple elements.

[0171] Although specific embodiments have been described in the detailed description of the present disclosure, it will be apparent that various modifications and changes may be made thereto without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be defined as being limited to these embodiments, but should be defined by the appended claims and their equivalents.

[0172] Although the present disclosure has been described with various embodiments, various changes and modifications may be suggested to one skilled in the art. The present disclosure is intended to encompass such changes and modifications as fall within the scope of the appended claims.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving configuration information about quality of experience (QoE) measurements from a base station, in, The configuration information includes information indicating a signaling radio bearer (SRB) for sending a report of the QoE measurement according to the configuration information; generating a QoE report by performing the QoE measurement based on the configuration information; as well as The QoE report is sent via the SRB based on the information.

2. The method according to claim 1, in, The SRB is configured for each QoE measurement configuration identifier, and the QoE report is sent via the SRB for each QoE measurement configuration identifier, The SRB is one of SRB4 associated with the primary base station and SRB5 associated with the secondary base station, Wherein, when the information indicates the SRB4, the QoE report is sent to the primary base station via the SRB4, and Wherein, when the information indicates the SRB5, the QoE report is sent to the secondary base station via the SRB5.

3. The method according to claim 1, in, In case the SRB is not available for the QoE report, the QoE report is stored in the UE, and The SRB used to send the QoE report is negotiated between the primary base station and the secondary base station.

4. The method according to claim 1, further comprising: A UE capability message is sent to the base station, the UE capability message including first information indicating whether the UE supports QoE configuration in New Radio Dual Connectivity (NR-DC) and second information indicating whether the UE supports SRB5 for QoE reporting.

5. A method performed by a base station in a wireless communication system, the method comprising: Sending configuration information about Quality of Experience (QoE) measurements to User Equipment (UE), in, The configuration information includes information indicating a signaling radio bearer (SRB) for receiving a report of the QoE measurement according to the configuration information; as well as A QoE report including the QoE measurement is received from the UE via the SRB based on the configuration information.

6. The method according to claim 5, in, The SRB is configured for each QoE measurement configuration identifier, and the QoE report is received via the SRB for each QoE measurement configuration identifier, The SRB is one of SRB4 associated with the primary base station and SRB5 associated with the secondary base station, Wherein, in the case where the information indicates the SRB4, the QoE report is received via the SRB4, and Wherein, when the information indicates the SRB5, the QoE report is received via the SRB5.

7. The method according to claim 5, in, In case the SRB is not available for the QoE report, the QoE report is stored in the UE, The SRB for receiving the QoE report is negotiated between the primary base station and the secondary base station, and Wherein, the method further comprises: A UE capability message is received from the UE, the UE capability message including first information indicating whether the UE supports QoE configuration in New Radio Dual Connectivity (NR-DC) and second information indicating whether the UE supports SRB5 for QoE reporting.

8. A user equipment (UE) in a wireless communication system, the UE comprising: transceiver; and A controller is coupled to the transceiver and is configured to: receiving configuration information about quality of experience (QoE) measurements from a base station, in, The configuration information includes information indicating a signaling radio bearer (SRB) for sending a report of the QoE measurement according to the configuration information, generating a QoE report by performing the QoE measurement based on the configuration information, and The QoE report is sent via the SRB based on the information.

9. The UE according to claim 8, in, The SRB is configured for each QoE measurement configuration identifier, and the QoE report is sent via the SRB for each QoE measurement configuration identifier, The SRB is one of SRB4 associated with the primary base station and SRB5 associated with the secondary base station, Wherein, when the information indicates the SRB4, the QoE report is sent to the primary base station via the SRB4, and Wherein, when the information indicates the SRB5, the QoE report is sent to the secondary base station via the SRB5.

10. The UE according to claim 8, in, In case the SRB is not available for the QoE report, the QoE report is stored in the UE, and The SRB used to send the QoE report is negotiated between the primary base station and the secondary base station.

11. The UE according to claim 8, in, The controller is also configured to: A UE capability message is sent to the base station, the UE capability message including first information indicating whether the UE supports QoE configuration in New Radio Dual Connectivity (NR-DC) and second information indicating whether the UE supports SRB5 for QoE reporting.

12. A base station in a wireless communication system, the base station comprising: transceiver; and A controller is coupled to the transceiver and is configured to: Sending configuration information about Quality of Experience (QoE) measurements to User Equipment (UE), in, The configuration information includes information indicating a signaling radio bearer (SRB) for receiving a report of the QoE measurement according to the configuration information, and A QoE report including the QoE measurement is received from the UE via the SRB based on the configuration information.

13. The base station according to claim 12, in, The SRB is configured for each QoE measurement configuration identifier, and the QoE report is received via the SRB for each QoE measurement configuration identifier, The SRB is one of SRB4 associated with the primary base station and SRB5 associated with the secondary base station, Wherein, in the case where the information indicates the SRB4, the QoE report is received via the SRB4, and Wherein, when the information indicates the SRB5, the QoE report is received via the SRB5.

14. The base station according to claim 12, in, In case the SRB is not available for the QoE report, the QoE report is stored in the UE, and The SRB used to receive the QoE report is negotiated between the primary base station and the secondary base station.

15. The base station according to claim 12, in, The controller is also configured to: A UE capability message is received from the UE, the UE capability message including first information indicating whether the UE supports QoE configuration in New Radio Dual Connectivity (NR-DC) and second information indicating whether the UE supports SRB5 for QoE reporting.

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