Method and apparatus for supporting qoe in mobile communication system

Abstract

The present invention relates to a method comprising the steps of: receiving a first radio resource control (RRC) message, the first RRC message comprising at least one piece of quality of experience (QoE) configuration information and information indicating that the at least one piece of QoE configuration information is related to a piece of signaling-based QoE configuration information; receiving a second RRC message for releasing the RRC connection; measuring QoE based on the at least one piece of QoE configuration information; and transmitting a third RRC message including signaling-based information related to QoE to the base station once the terminal in the RRC idle state or in the RRC inactive state is connected to the base station.

Description

Technical Field

[0001] The present disclosure relates to operations of a terminal and a base station in a mobile communication system. In addition, the present disclosure relates to a method for protecting signaling-based Quality-Of-Experience (QoE) in a mobile communication system. Background Art

[0002] 5G mobile communication technology defines a wide frequency band to realize fast transmission speed and new services, and can be realized not only in sub-6 GHz frequency bands ("sub-6 GHz") such as 3.5 GHz, but also in ultra-high frequency bands ("above 6 GHz") called mmWave (millimeter wave) such as 28 GHz or 39 GHz. In addition, 6G mobile communication technology, referred to as "super 5G system", is considered for implementation in terahertz (THz) frequency bands (e.g., frequency bands of 95 GHz to 3 THz) to realize transmission speeds 50 times faster than 5G mobile communication technology and ultra-low latency reduced to 1 / 10.

[0003] In the early days of 5G mobile communication technology, in order to meet the service support and performance requirements of enhanced mobile broadband (eMBB), ultra-reliable and low-latency communication (URLLC) and massive machine type communication (mMTC), standardization has been carried out on the following various technologies: beamforming for alleviating path loss of radio waves and increasing their propagation distance in mmWave bands, massive MIMO, various parameter sets supporting efficient use of ultra-high frequency resources (e.g., operating multiple subcarrier spacings), dynamic operation of time slot formats, initial access schemes supporting multi-beam transmission and broadband, definition and operation of bandwidth parts (BWPs), new channel coding schemes (such as low-density parity-check (LDPC) codes for large-capacity data transmission and polar codes for reliable transmission of control information), L2 preprocessing, and network slicing for providing dedicated networks dedicated to specific services.

[0004] Currently, discussions are underway to improve 5G mobile communication technology and enhance its performance, taking into account the services that 5G mobile communication technology is originally intended to support, and physical layer standardization is underway for various technologies such as: V2X (Vehicle-to-Everything) which is intended to help autonomous vehicles make driving decisions based on their own positions and status information transmitted by the vehicle and increase user convenience, New Radio Unlicensed (NR-U) for the purpose of system operation that meets various regulatory requirements in unlicensed bands, a low power consumption scheme (UE power save) for NR terminals, a non-terrestrial network (NTN) as a terminal-satellite communication to ensure coverage in areas where communication with terrestrial networks is not possible, and positioning.

[0005] In addition, standardization in radio interface architecture / protocol is underway for various technologies such as: technology for smart factories (Industrial Internet of Things IIoT) that supports new services by linking and converging with other industries, integrated access and backhaul (IAB) that provides nodes for network service area expansion by integrating and supporting wireless backhaul links and access links, mobility enhancement including conditional handover and dual active protocol stack (DAPS) handover, 2-step random access that simplifies the random access procedure (2-step RACH for NR); and standardization in system architecture / service is also underway for various technologies such as: 5G baseline architecture (e.g., service-based architecture, service-based interface) for integrating network function virtualization (NFV) and software defined network (SDN) technologies, and mobile edge computing (MEC) in which terminals receive services based on their locations.

[0006] When such 5G mobile communication systems are commercialized, an explosively increasing number of connected devices will be connected to the communication network; therefore, it is expected that there will be a need to enhance the functions and performance of the 5G mobile communication systems and the integrated operations of the connected devices. To this end, new research will be conducted on 5G performance improvement and complexity reduction by utilizing extended reality (XR) for effectively supporting augmented reality (AR), virtual reality (VR) and mixed reality (MR), artificial intelligence (AI) and machine learning (ML), AI service support, metaverse service support, and drone communication.

[0007] In addition, such advancements in 5G mobile communication systems will be the basis for the development of various technologies such as new waveforms for ensuring coverage in the terahertz band for 6G mobile communication technology, full-dimensional MIMO (FD-MIMO), multi-antenna transmission (such as array antennas or massive antennas), metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional spatial multiplexing using orbital angular momentum (OAM), reconfigurable smart surface (RIS) technology, full-duplex technology for improving frequency efficiency and system networks for 6G mobile communication technology, satellites, AI-based communications that utilize artificial intelligence (AI) from the design stage and internalize end-to-end AI support functions to achieve system optimization, and next-generation distributed computing that enables services whose complexity exceeds the computing power limits of terminals by utilizing ultra-high-performance communication and computing resources. Summary of the invention

[0008] Technical issues

[0009] The present disclosure aims to provide an effective operation method for a terminal and a base station in a mobile communication system. In addition, the present disclosure aims to provide a method and apparatus for protecting signaling-based QoE in a mobile communication system.

[0010] Technical Solutions

[0011] In an embodiment of the present disclosure to achieve the above-mentioned purpose, a method of a terminal in a wireless communication system may include: receiving a first radio resource control (RRC) message, the first RRC message including at least quality of experience (QoE) configuration information and information indicating that the QoE configuration information is related to a piece of signaling-based QoE configuration information; receiving a second RRC message for RRC connection release; performing a QoE measurement operation according to at least one piece of QoE configuration information; and sending a third RRC message including signaling-based QoE-related information to a base station when a terminal in an RRC idle state or an RRC inactive state is connected to the base station.

[0012] In addition, in an embodiment of the present disclosure, a method of a base station in a wireless communication system may include: when connected to a terminal in a radio resource control (RRC) idle state or an RRC inactive state, receiving an RRC message including signaling-based quality of experience (QoE)-related information from the terminal; receiving a request for configuring management-based QoE from a server; and determining whether to configure management-based QoE to the terminal based on the signaling-based QoE-related information.

[0013] In addition, in an embodiment of the present disclosure, a terminal in a wireless communication system may include: a transceiver; and a controller, wherein the controller may be configured to control: receiving a first radio resource control (RRC) message, the first RRC message including at least quality of experience (QoE) configuration information and information indicating that the QoE configuration information is related to a piece of signaling-based QoE configuration information; receiving a second RRC message for RRC connection release; performing a QoE measurement operation according to at least one piece of QoE configuration information; and sending a third RRC message including signaling-based QoE-related information to a base station when a terminal in an RRC idle state or an RRC inactive state is connected to the base station.

[0014] In addition, in an embodiment of the present disclosure, a base station in a wireless communication system may include: a transceiver; and a controller, wherein the controller may be configured to control: when connected to a terminal in a radio resource control (RRC) idle state or an RRC inactive state, receiving an RRC message including signaling-based quality of experience (QoE) related information from a terminal; receiving a request for configuring management-based QoE from a server; and determining whether to configure management-based QoE to the terminal based on the signaling-based QoE related information.

[0015] Technical objects to be achieved in the embodiments of the present disclosure are not limited to those described above, and other technical objects not mentioned will be clearly understood by those skilled in the art to which the present disclosure belongs from the following description.

[0016] Beneficial effects

[0017] According to an embodiment of the present disclosure, an efficient operation method for a terminal and a base station in a mobile communication system may be provided.

[0018] In addition, according to an embodiment of the present disclosure, a method and apparatus for protecting signaling-based QoE in a mobile communication system may be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG. 1 is a diagram illustrating an architecture of a next generation mobile communication system according to an embodiment of the present disclosure.

[0020] FIG. 2 is a diagram illustrating a quality of experience (QoE) measurement operation according to an embodiment of the present disclosure.

[0021] FIG. 3 is a diagram for explaining signaling-based QoE and management-based QoE according to an embodiment of the present disclosure.

[0022] FIG. 4 is a diagram for explaining a problem in which signaling-based QoE is invalidated according to an embodiment of the present disclosure.

[0023] FIG. 5 is a diagram for explaining a method for protecting signaling-based QoE according to an embodiment of the present disclosure.

[0024] FIG. 6 is a diagram for describing UE operation for protecting signaling-based QoE according to an embodiment of the present disclosure.

[0025] FIG. 7 is a diagram for describing a base station operation for protecting signaling-based QoE according to an embodiment of the present disclosure.

[0026] FIG. 8 is a diagram for explaining a method for protecting signaling-based QoE in an RRC_INACTIVE mode according to an embodiment of the present disclosure.

[0027] FIG. 9 is a diagram for describing an operation of a legacy base station for protecting signaling-based QoE in an RRC_INACTIVE mode according to an embodiment of the present disclosure.

[0028] FIG. 10 is a diagram for describing an operation of a neighboring base station for protecting signaling-based QoE in an RRC_INACTIVE mode according to an embodiment of the present disclosure.

[0029] FIG. 11 is a diagram showing a structure of a UE according to an embodiment of the present disclosure.

[0030] FIG. 12 is a diagram showing a structure of a base station according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Here, it should be noted that in the accompanying drawings, the same components are represented by the same symbols as much as possible. In addition, the detailed description of known functions and configurations that may obscure the gist of the present disclosure will be omitted.

[0032] When describing the embodiments in this specification, the description of technical details that are well known in the art and not directly related to the present disclosure may be omitted. This is to more clearly convey the gist of the present disclosure by omitting unnecessary descriptions without causing confusion.

[0033] Likewise, in the accompanying drawings, some elements are enlarged, omitted or only briefly outlined. Moreover, the size of each element does not necessarily reflect the actual size. The same reference numerals are used throughout the accompanying drawings to refer to the same or corresponding parts.

[0034] The advantages and features of the present disclosure and the methods for achieving them will be apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below, but can be implemented in various different ways. The embodiments are provided only to make the present disclosure complete and to fully inform the technical personnel in the field to which the present disclosure belongs, and the present disclosure is limited only by the scope of the claims. The same reference numerals are used throughout the specification to refer to the same parts.

[0035] At the same time, it is known to those skilled in the art that the combination of the blocks of the flowchart (or sequence diagram) and the flowchart can be represented and executed by computer program instructions. These computer program instructions can be loaded on a processor of a general-purpose computer, a special-purpose computer, or a programmable data processing device. In the case where the loaded program instructions are executed by the processor, they create equipment for performing the functions described in the flowchart. Since the computer program instructions can be stored in a computer-readable memory available in a special-purpose computer or a programmable data processing device, it is also possible to create an article that performs the functions described in the flowchart. Since the computer program instructions can be loaded on a computer or a programmable data processing device, they can perform the steps of the functions described in the flowchart when executed as a process.

[0036] The blocks of the flow chart may correspond to modules, segments or codes containing one or more executable instructions that implement one or more logical functions, or to portions thereof. In some cases, the functions described by the blocks may be performed in an order different from the order listed. For example, two blocks listed in sequence may be performed simultaneously or in reverse order.

[0037] In the description, the words "unit", "module", etc. may refer to software components or hardware components that can perform functions or operations, such as FPGA or ASIC. However, "unit", etc. are not limited to hardware or software. Units, etc. may be configured to reside in an addressable storage medium or drive one or more processors. Units, etc. may refer to software components, object-oriented software components, class components, task components, processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcodes, circuits, data, databases, data structures, tables, arrays, or variables. The functions provided by components and units may be combinations of smaller components and units, and may be combined with other components and units to form large components and units. Components and units may be configured to drive devices or one or more processors in a secure multimedia card.

[0038] In the following description, the term "base station" refers to a main agent that allocates resources to a terminal, and may be at least one of a node B, a BS, an eNB (eNode B), a gNB (gNode B), a radio access unit, a base station controller, and a network node. The term "terminal" may refer to at least one of a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, and a multimedia system having a communication function. In addition, the embodiments of the present disclosure may be applied to other communication systems having a technical background or channel type similar to the embodiments of the present disclosure described below. In addition, without significantly departing from the scope of the present disclosure, the embodiments of the present disclosure may be applied to other communication systems with some modifications. For example, this may include the fifth generation mobile communication technology (5G, New Radio, NR) developed after LTE-A, and the term 5G hereinafter may be a concept including existing LTE, LTE-A, and other similar services. In addition, those skilled in the art should understand that the present disclosure is applicable to other communication systems without significant modifications departing from the scope of the present disclosure.

[0039] In the following description, the terms used to identify an access node, indicate a network entity or a network function (NF), indicate a message, indicate an interface between network entities, and indicate various identification information are considered to be illustrative for the convenience of description. Therefore, the present disclosure is not limited to the terms described later, and other terms referring to objects with equivalent technical meanings may be used.

[0040] For ease of explanation, some terms and names defined in the 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) standard and / or the 3GPP NR (New Radio) standard may be used in the following description. However, the present disclosure is not limited to the above terms and names, and may be equally applied to systems that comply with other standards. The description written based on the LTE system in the present disclosure may also be applied to other mobile communication systems, such as the next generation mobile communication system NR. For example, in the present disclosure, the eNB in ​​LTE may correspond to the gNB in ​​NR, and the MME in LTE may correspond to the AMF in NR.

[0041] FIG. 1 is a diagram illustrating an architecture of a next generation mobile communication system according to an embodiment of the present disclosure.

[0042] Referring to Figure 1, as shown in the figure, the radio access network of the next generation mobile communication system (new radio, NR) consists of a new radio node B (hereinafter, gNB) 1-10 and an AMF (new radio core network) 1-05. The new radio user equipment (hereinafter, NR UE or terminal) 1-15 is connected to an external network through the gNB 1-10 and the AMF 1-05.

[0043] In FIG. 1 , gNB 1-10 corresponds to an evolved Node B (eNB) of an existing LTE system. The gNB 1-10 may be connected to the NR UE 1-15 through a radio channel, and it may provide services superior to those of the existing Node B (1-20). Since all user traffic is served through a shared channel in the next generation mobile communication system, an entity that performs scheduling by collecting status information such as a buffer status, an available transmission power status, and a channel status of the UE is required, and the gNB 1-10 is responsible for this. In a typical case, one gNB controls a plurality of cells. In order to achieve ultra-high-speed data transmission compared to the current LTE, a bandwidth exceeding the existing maximum bandwidth may be utilized, and a beamforming technique may be additionally combined with orthogonal frequency division multiplexing (OFDM) used as a radio access technology. In addition, an adaptive modulation and coding (AMC) scheme that determines a modulation scheme and a channel coding rate to match the channel status of the UE is applied. The AMF 1-05 may perform functions such as mobility support, bearer configuration, and QoS (Quality of Service) configuration. AMF 1-05 is an entity responsible not only for mobility management but also for various control functions of UE, and is connected to multiple base stations. In addition, the next-generation mobile communication system can interwork with the existing LTE system, and AMF 1-05 is connected to MME 1-25 through a network interface. MME 1-25 is connected to eNB 1-30, which is a traditional base station. A UE supporting LTE-NR dual connectivity can send and receive data while maintaining connections with both gNB 1-10 and eNB 1-30 (1-35).

[0044] FIG. 2 is a diagram of a QoE (Quality of Experience) measurement operation according to an embodiment of the present disclosure.

[0045] QoE measurement and reporting operations mean reporting specific results measured at the application layer of the UE to the network (gNB) according to network settings. The application layer refers to the layer that provides specific services such as streaming services, MTSI (Multimedia Telephone Service of IMS) services, and VR services. In addition, it will be extended to AR / MR services and MBS (Multicast / Broadcast Service) services.

[0046] When the application layer of the network (gNB) provides the UE with configuration information for operation, the QoE measurement and reporting operation may be driven. At this time, the base station sends a specific RRC message (2-05) including an RRC container in which the configuration information provided from the application layer of the network is stored to the UE. The specific RRC message may be an RRCReconfiguration message. The RRC container may be included in a specific IE AppLayerMeasConfig (application layer measurement configuration) of the RRCReconfiguration message. The ASN.1 of the AppLayerMeasConfig IE is shown in Table 1 below.

[0047] [Table 1]

[0048]

[0049] maxNrofAppLayerMeas (maximum number of application layer measurements) is information indicating the maximum number of QoE configuration information sets (MeasConfigAppLayer (measurement configuration application layer) IE). Up to 16 (maxNrofAppLayerMeas=16) QoE configuration information sets (measConfigAppLayer IE) can be provided by AppLayerMeasConfig set by the base station. Each configuration information (MeasConfigAppLayer) is identified by the ID indicated by the measConfigAppLayerId (measurement configuration application layer Id) field and corresponds to an application service indicated by the serviceType (service type) field. The configuration information provided by the application layer of the network is stored in the measConfigAppLayerContainer (measurement configuration application layer container) field.

[0050] The configuration information (measConfigAppLayerContainer) is delivered to the application layer of the UE, and the application layer of the UE collects specific measurement results according to the above configuration information (measConfigAppLayerContainer). The collected results are stored in an RRC container and delivered to the application layer of the network (gNB) through a given RRC message MeasurementReportAppLayer (Measurement Report Application Layer) (2-10). The MeasurementReportAppLayer message is provided via SRB. The SRB can be SRB4 (Signaling Radio Bearer 4). The ASN.1 of the MeasurementReportAppLayer message is shown in Table 2 below.

[0051] [Table 2]

[0052]

[0053] The above RRC message may include a measConfigAppLayerId field and a plurality of measurementReportAppLayerContainer (measurement report application layer container) fields separated by the measConfigAppLayerId field. The QoE measurement result may be stored in the measurementReportAppLayerContainer field. The RRC message may be sent from the UE to the base station.

[0054] In the Rel-17 NR system, the above QoE measurement and reporting operations are only possible in connected mode. However, since the Rel-18 NR system will consider MBS services that can be served in all RRC states for QoE measurement and reporting operations, the QoE measurement and logging operations will also be performed in the RRC_IDLE and RRC_INACTIVE states of the UE.

[0055] FIG. 3 is a diagram for explaining signaling-based QoE and management-based QoE according to an embodiment of the present disclosure.

[0056] QoE is divided into signaling-based QoE and management-based QoE. There is signaling-based QoE in which OAM requests a QoE operation to a specific UE, and management-based QoE in which OAM requests a QoE operation to a specific UE belonging to a specified area.

[0057] In signaling-based QoE, OAM 3-05 designates a specific UE 3-25 to perform QoE operations and sends related QoE configuration information to the base station 3-15 (3-10). The base station 3-15 includes the configuration information provided by OAM in an RRCReconfiguration message and sends it to the UE 3-25 (3-20).

[0058] In management-based QoE, OAM 3-05 specifies an area of ​​interest in which a QoE result is required, and transmits related QoE configuration information to a base station 3-35 (3-30). The base station 3-35 selects specific UEs 3-45, 3-50, and 3-55 among UEs supporting QoE in the area of ​​interest, and transmits an RRCReconfiguration message including configuration information provided by OAM to the selected UEs 3-45, 3-50, and 3-55 (3-40).

[0059] Signaling-based QoE is performed only in the specified UE and should not be invalidated (stopped or limited) by management-based QoE. For example, up to 16 QoE configuration sets can be configured in a single UE. If the QoE configuration exceeds this number, the existing QoE configuration and related stored information may need to be deleted. At this time, the configuration information and measurement results for the existing signaling-based QoE should not be deleted.

[0060] UEs that have received the above QoE configuration information do not recognize whether the QoE set for them is based on signaling or management. That is, the current QoE configuration information does not contain any information that can indicate whether it is based on signaling or management. However, since the QoE operation in the Rel-17 NR system is performed only in the RRC_CONNECTED state of the UE, the network can control the signaling-based QoE so that it is not stopped.

[0061] FIG. 4 is a diagram for explaining a problem in which signaling-based QoE is invalidated according to an embodiment of the present disclosure.

[0062] MBS services that can be received in all RRC states can also be considered for QoE measurement. Therefore, even in the RRC_IDLE or RRC_INACTIVE state, the UE can perform QoE measurement and storage operations. At this time, for the UE that has transitioned to the RRC_CONNECTED state, it is difficult for the base station to determine whether the signaling-based QoE has been previously configured in the UE. Therefore, the base station may configure a new QoE to the UE, and the UE may have to invalidate the previously configured signaling-based QoE to apply the new QoE configuration.

[0063] The OAM 4-05 sends signaling-based QoE configuration information for the first UE 4-30 to the first base station 4-15 (4-10). The QoE configuration information is for MBS service, which instructs the first UE 4-30 to perform QoE operation even in the RRC_IDLE or RRC_INACTIVE state. The first base station 4-15 triggers QoE for the first UE 4-30 in the RRC_CONNECTED state (4-20), and sends configuration information about the QoE operation to be performed in the RRC_IDLE or RRC_INACTIVE state to the first UE 4-30 by using a specific RRC message (4-25). After transitioning to the RRC_IDLE or RRC_INACTIVE state, the first UE 4-30 collects and stores QoE measurement results according to the QoE configuration information (4-35). Thereafter, the first UE 4-30 is connected to the second base station 4-45. The first UE 4-30 maintains the configuration information of the signaling-based QoE operation that has not been terminated or the signaling-based QoE measurement results that have not been reported. OAM 4-05 may request the second base station 4-45 to collect QoE measurement results in a specific area (4-40). The second base station 4-45 selects a specific UE among the UEs that support QoE operation in the above-mentioned area and configures the QoE operation (4-55). At this time, if the first UE 4-30 is the selected UE and the first UE 4-30 cannot apply the new QoE operation without deleting the previously configured QoE configuration, the first UE 4-30 may have to delete the configuration information and related collection information about the previously configured signaling-based QoE. This means that the signaling-based QoE that has been triggered by OAM 4-05 is invalidated.

[0064] In order to prevent the invalidation of the signaling-based QoE as described above, the second base station 4-45 should know that the first UE 4-30 has configuration information of the signaling-based QoE operation that has not been terminated or the signaling-based QoE measurement result that has not been reported. Therefore, various embodiments of the present disclosure propose a method by which the base station can determine whether the UE has configuration information of the signaling-based QoE operation that has not been terminated or the signaling-based QoE measurement result that has not been reported.

[0065] FIG. 5 is a diagram for explaining a method for protecting signaling-based QoE according to an embodiment of the present disclosure.

[0066] In the present disclosure, even in QoE performed in RRC_IDLE or RRC_INACTIVE state, one or more QoE configuration information sets may be provided to a UE through a specific RRC message. Each QoE configuration information set corresponds to a service. Each QoE configuration information set may be identified by a measConfigAppLayerId field such as in Rel-17 QoE or by a trace reference. The trace reference information includes a PLMN ID (plmn-Identity field) and a trace ID (traceId field).

[0067] In order to configure the first UE 5-30 with signaling-based QoE to be performed in the RRC_IDLE or RRC_INACTIVE state, the OAM 5-05 sends relevant configuration information to the first base station 5-15 (5-10). At this time, there may be one or more application services, and a separate set of QoE configuration information may be provided corresponding to each application service. The first base station 5-15 triggers QoE to the first UE 5-30 (5-20), and configures QoE to the first UE 5-30 in the RRC_CONNECTED state by using a specific RRC message (5-25). The above-mentioned RRC message may be an existing LoggedMeasurementConfiguration message or an RRCReconfiguration message or a new RRC message.

[0068] Each QoE configuration information corresponding to a service provided by the first base station 5-15 includes an indication indicating whether the configured QoE is signaling-based or management-based. Through this indication, the first UE 5-30 can determine whether the QoE operation corresponding to each service is signaling-based or management-based. For example, an indication is set per measConfigAppLayerId or tracking reference. If all QoE configuration information sets to be configured are signaling-based QoE, a single indication indicating this can be set. In order to receive and identify the above indications, the corresponding UE capabilities may be required, and for this purpose, the first UE 5-30 may report its capability information to the first base station 5-15 in advance.

[0069] The first UE 5-30 transitions from the RRC_CONNECTED state to the RRC_IDLE or RRC_INACTIVE state, and performs QoE operations according to the QoE configuration in the above RRC state (5-35). When connected to the second base station 5-50, the above first UE 5-30 may report to the second base station that it has signaling-based QoE configuration information that needs to be protected or QoE measurement results that have been collected but not reported according to the signaling-based QoE configuration (5-40) by using a specific RRC message. The specific RRC message may be an existing RRCSetupComplete, RRCResumeComplete, RRCReconfigurationComplete, RRCReestablishmentComplete, or UEAssistanceInformation message or a new RRC message. The first UE 5-30 may include an indication for each QoE configuration information set. For example, the indication may be included if one of the following conditions is met.

[0070] 1) Signaling-based QoE is configured and results are available,

[0071] 2) Signaling-based QoE is configured, but no results are available, e.g., nothing has been stored so far, or all previously stored results have been retrieved, or

[0072] 3) QoE configuration based on signaling

[0073] As another method, for each QoE configuration information set, a Boolean format indication may be used to indicate whether the first UE 5-30 has valid signaling-based QoE configuration information or whether there are QoE measurement results collected but not reported according to the signaling-based QoE configuration. For example, if the Boolean format indication is set to "true", this means that the first UE 5-30 has valid signaling-based QoE configuration information; if it is set to "false", this means that there are QoE measurement results that have been collected but not reported according to the signaling-based QoE configuration.

[0074] In addition to the above indication method, the UE may report to the base station information about a list of tracking references or measConfigAppLayerId corresponding to the previously configured signaling-based QoE or management-based QoE, information about a list of tracking references or measConfigAppLayerId for which RAN visible QoE measurement is configured, and the like.

[0075] If the UE can handle multiple QoE operations simultaneously, the UE may have room to additionally configure new QoE operations in addition to the previously configured (signaling-based) QoE operations. Therefore, if the UE reports the number of currently configured signaling-based QoE configuration information sets to the base station, and the base station knows the maximum number of QoE operations that the UE can perform simultaneously, the base station can determine whether it can configure additional QoE operations to the UE. Therefore, the UE may report at least one of the following information to the base station.

[0076] -The number of signaling-based QoE configuration information sets currently configured in the UE

[0077] -The number of additionally configurable QoE actions to take into account the existing (signaling-based) QoE

[0078] (In addition, the UE can report other useful information to the base station)

[0079] - an indication that the QoE configuration has been released but there are QoE measurements that have not yet been reported, or information about a list of tracking references or measConfigAppLayerIds corresponding to them

[0080] - An indication that RAN-visible QoE configuration information is configured or that there are RAN-visible QoE measurement results, or information about a list of tracking references or measConfigAppLayerIds corresponding thereto

[0081] - Previously configured QoE service type information. This can be indicated per measConfigAppLayerId or trace reference

[0082] The UE may also send the QoE configuration information (or part thereof) configured by the old base station to the newly connected serving base station by using a specific RRC message.

[0083] The OAM 5-05 configures the management-based QoE for the specific area to the second base station 5-50 (5-45). The second base station 5-50 may configure QoE to specific UEs 5-60 and 5-65 other than the first terminal 5-30 (5-55). If the first UE 5-30 has a previously configured signaling-based QoE but may additionally perform QoE operations, the second base station 5-50 may additionally configure QoE to the first UE 5-30 if permitted.

[0084] If the first UE 5-30 has a previously configured management-based QoE, it can be overridden by the QoE configured by the second base station 5-50. At this time, the second base station 5-50 can assign the same ID as the measConfigAppLayerId or tracking reference corresponding to the previously configured management-based QoE to the new QoE configuration information and configure it to the first UE 5-30. Upon receiving this, the first UE 5-30 considers that the previously configured management-based QoE is overridden by the new QoE configuration information, deletes the previously configured QoE configuration information, and applies the new QoE configuration information instead. If the intention is to release the previously configured management-based QoE, the second base station 5-50 can instruct the first UE 5-30 to release it together with the corresponding measConfigAppLayerId or tracking reference information.

[0085] If all QoE configuration information sets of the first UE 5-30 are management-based QoE and the second base station 5-50 intends to release them all, the second base station 5-50 may send an indication to the first UE 5-30 indicating this.

[0086] FIG6 is a diagram describing UE operations for protecting signaling-based QoE according to an embodiment of the present disclosure.

[0087] The operation of the UE in FIG. 6 may correspond to the operation of the first UE in FIG. 5 , and FIG. 5 may be referred to for detailed operations.

[0088] In step 6-05, the UE in the RRC_CONNECTED state receives QoE configuration information to be applied in the RRC_IDLE or RRC_INACTIVE state from the base station. The configuration information includes QoE configuration information sets corresponding to multiple services respectively. Each QoE configuration information set includes an indication indicating whether the corresponding QoE operation is signaling-based QoE or management-based QoE.

[0089] In step 6-10, the UE receives an RRCRelease (RRC release) message from the base station, which includes configuration information indicating switching to the RRC_IDLE or RRC_INACTIVE state.

[0090] In step 6-15, the UE performs QoE operations in the RRC_IDLE or RRC_INACTIVE state according to the received QoE configuration information.

[0091] In step 6-20, the UE switches to the RRC_CONNECTED state with respect to the base station. The base station may be the base station that has sent the RRCRelease message or a different base station.

[0092] At step 6-25, the UE sends an indication to the base station indicating that the UE has the previously configured signaling-based QoE. For example, the UE may report at least one of the following information.

[0093] - For each QoE configuration information set, an indication of whether one of the following conditions is met:

[0094] 1) Signaling-based QoE is configured and results are available

[0095] 2) Signaling-based QoE is configured, but no results are available, e.g., nothing has been stored so far, or all previously stored results have been retrieved, or

[0096] 3) QoE configuration based on signaling

[0097] - For each QoE configuration information set, a Boolean indication indicating whether the UE has valid signaling-based QoE configuration information or whether there are QoE measurements collected but not reported based on the signaling-based QoE configuration

[0098] - Information about a list of tracking references or measConfigAppLayerIds corresponding to previously configured signaling-based or management-based QoE

[0099] - Information about the list of tracking references or measConfigAppLayerIds for which RAN-visible QoE measurements are configured

[0100] -The number of signaling-based QoE configuration information sets currently configured in the UE

[0101] - Maximum number of additional configurable QoEs, taking into account existing (signaling-based) QoEs

[0102] - an indication that the QoE configuration has been released but there are QoE measurements that have not yet been reported, or information about a list of tracking references or measConfigAppLayerIds corresponding to them

[0103] - An indication that RAN-visible QoE configuration information is configured or that there are RAN-visible QoE measurement results, or information about a list of tracking references or measConfigAppLayerIds corresponding thereto

[0104] - Previously configured QoE service type information. This can be indicated per measConfigAppLayerId or trace reference

[0105] The base station having received at least one piece of information from the UE may perform operations to protect signaling-based QoE. For detailed operations, refer to operations in FIG5 and FIG7 below.

[0106] FIG. 7 is a diagram describing a base station operation for protecting signaling-based QoE according to an embodiment of the present disclosure.

[0107] The operation of the base station in FIG. 7 may correspond to the operation of the second base station in FIG. 5 , and FIG. 5 may be referred to for detailed operations.

[0108] In step 7-05, the base station connects to the UE.

[0109] In step 7-10, the base station receives at least one piece of the above information from the UE. For the at least one piece of information, refer to the at least one piece of information described in step 6-25 of FIG. 6 .

[0110] In step 7-15, the base station identifies that the UE has a measurement result according to the signaling-based QoE or the above QoE configuration. For example, based on the information received in step 7-10, the base station may identify that the UE has a measurement result according to the signaling-based QoE or the above QoE configuration.

[0111] In step 7-20, when configuring management-based QoE, the base station may exclude the UE or configure a new QoE as long as the UE allows.

[0112] FIG. 8 is a diagram for describing a method for protecting signaling-based QoE in RRC_INACTIVE mode according to an embodiment of the present disclosure.

[0113] When the UE transitions from the RRC_INACTIVE state to the RRC_CONNECTED state, the serving base station may retrieve various configuration information about the UE from the old base station. This configuration information is referred to as "inactive UE context". An embodiment of the present disclosure proposes a method of additionally including QoE configuration information provided to the UE in the inactive UE context and allowing the serving cell to utilize it to prevent signaling-based QoE from being covered.

[0114] The OAM 8-05 sends signaling-based QoE configuration information for the first UE 8-30 to the first base station 8-15 (8-10). The QoE configuration information is for MBS service, which instructs the first UE 8-30 to perform QoE operation even in the RRC_IDLE or RRC_INACTIVE state. The first base station 8-15 triggers QoE for the first UE 8-30 in the RRC_CONNECTED state (8-20), and sends configuration information for QoE operation to be performed in the RRC_IDLE or RRC_INACTIVE state to the first UE by using a specific RRC message (8-25).

[0115] The first base station 8-15 sends a RRCRelease message including a suspendConfig IE to the first UE 8-30, and stores an inactive UE context of the first UE 8-30. The inactive UE context may include QoE configuration information set for the first UE 8-30 (8-35). After the first UE 8-30 transitions to the RRC_IDLE or RRC_INACTIVE state, it collects and stores QoE measurement results according to the QoE configuration information (8-40).

[0116] Thereafter, the first UE 8-30 is connected to the second base station 8-50 (8-45) through a recovery process. The second base station 8-50 requests the inactive UE context of the first UE 8-30 from the first base station 8-15 (8-55). Upon receiving the above request, the first base station 8-15 sends the inactive UE context to the second base station 8-50 (8-60). Based on the inactive UE context, the second base station 8-50 recognizes that the first UE 8-30 has configuration information for signaling-based QoE operations that have not been terminated or unreported signaling-based QoE measurement results. The second base station 8-50 can control the QoE operation of the first UE 8-30 based on the information obtained from the inactive UE context.

[0117] OAM 8-05 may request the second base station 8-50 to collect QoE measurement results in a specific area (8-65). The second base station 8-50 selects a specific UE among the UEs that support QoE operations in the area, and configures QoE operations to the selected UE (8-70). At this time, the second base station 8-50 may configure QoE to specific UEs 8-75 and 8-80 other than the first UE 8-30. The second base station 8-50 may configure QoE to the first UE 8-30 based on information obtained from the inactive UE context. If the first UE 8-30 has a previously configured signaling-based QoE but may perform additional QoE operations, the second base station 8-50 may additionally configure QoE to the first UE 8-30 if permitted.

[0118] FIG. 9 is a diagram describing the operation of an old base station (old gNB) for protecting signaling-based QoE in RRC_INACTIVE mode according to an embodiment of the present disclosure.

[0119] The operation of the old base station in FIG. 9 may correspond to the operation of the first base station in FIG. 8 , and FIG. 8 may be referred to for detailed operations.

[0120] At step 9-05, the base station configures the UE with signaling-based QoE to be applied in RRC_INACTIVE.

[0121] In steps 9-10, the base station stores the QoE configuration information in the inactive UE context of the UE.

[0122] In step 9-15, the base station causes the UE to transition to the RRC_INACTIVE state through an RRCRelease message.

[0123] At step 9-20, the base station receives a request for an inactive UE context of the UE from a neighboring base station. The base station may check whether the inactive UE context of the UE requested from the neighboring base station is stored.

[0124] At step 9-25, the base station sends the requested inactive UE context to the neighboring base stations.

[0125] FIG. 10 is a diagram describing an operation of a neighboring base station for protecting signaling-based QoE in RRC_INACTIVE mode according to an embodiment of the present disclosure.

[0126] The operation of the neighboring base station in FIG. 10 may correspond to the operation of the second base station in FIG. 8 , and FIG. 8 may be referred to for detailed operations.

[0127] In step 10-05, the base station connects to the UE through a recovery process.

[0128] In step 10-10, the base station requests an inactive UE context of the UE from an old serving base station of the UE.

[0129] At step 10-15, the base station receives the inactive UE context from the old serving base station.

[0130] In step 10-20, based on the inactive UE context, the base station knows that the UE has configuration information for signaling-based QoE operation that has not been terminated, or signaling-based QoE measurement results that have not been reported.

[0131] At step 10-25, the base station configures QoE to the selected UE other than the UE. If the UE has previously configured signaling-based QoE but can additionally perform QoE operations, the base station can additionally configure QoE to the UE if allowed.

[0132] In another way, if the UE can no longer apply the new QoE configuration due to the previously configured signaling-based QoE operation, the UE can ignore the new QoE configuration set by the network and continue the previously configured signaling-based QoE operation. At this time, the UE can use a specific indication to report that it cannot apply the new QoE operation set by the network due to the previously configured signaling-based QoE set by the network.

[0133] Meanwhile, a method for providing information indicating that the UE has signaling-based QoE is described with reference to FIGS. 5, 6, and 7, and a method for the old gNB to provide an inactive UE context is described with reference to FIGS. 8, 9, and 10, but they may be performed in combination. For example, if the UE cannot provide information indicating that the UE has signaling-based QoE after transitioning to a connected state, the old serving base station may provide the inactive UE context to the current serving base station. However, if the current serving base station requests the inactive UE context from the old serving base station, but the corresponding information is not stored in the old serving base station, it may request the UE to report information indicating the presence of signaling-based QoE.

[0134] In addition, in the case where a UE that has transitioned from an RRC idle or inactive state to an RRC connected state provides information about signaling-based QoE, the current serving base station may selectively request an inactive UE context from an old serving base station or request a terminal report indicating the presence of signaling-based QoE.

[0135] FIG. 11 is a diagram showing a structure of a UE according to an embodiment of the present disclosure.

[0136] 11 , the UE may include a radio frequency (RF) processor 11 - 10, a baseband processor 11 - 20, a storage device 11 - 30, and a controller 11 - 40. In addition, the controller 11 - 40 may include a multi-connection processor 11 - 42.

[0137] The RF processor 11-10 performs functions such as signal band conversion and amplification for sending and receiving signals through a radio channel. That is, the RF processor 11-10 performs up-conversion of the baseband signal provided by the baseband processor 11-20 to an RF band signal and transmits it through an antenna, and performs down-conversion of the RF band signal received by the antenna to a baseband signal. For example, the RF processor 11-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), and an analog-to-digital converter (ADC). Although only one antenna is shown in the drawings, the UE may be provided with multiple antennas. In addition, the RF processor 11-10 may include multiple RF chains. In addition, the RF processor 11-10 may perform beamforming. For beamforming, the RF processor 11-10 may adjust the phase and amplitude of each signal sent and received by multiple antennas or antenna elements. In addition, the RF processor may perform MIMO (multiple input multiple output) and may receive several layers during MIMO operation.

[0138] The baseband processor 11-20 performs conversion between baseband signals and bit streams according to the physical layer specification of the system. For example, during data transmission, the baseband processor 11-20 generates complex symbols by encoding and modulating the transmission bit stream. In addition, during data reception, the baseband processor 11-20 recovers the received bit stream by demodulating and decoding the baseband signal provided from the RF processor 11-10. For example, in the case of using orthogonal frequency division multiplexing (OFDM), for data transmission, the baseband processor 11-20 generates complex symbols by encoding and modulating the transmission bit stream, maps the complex symbols to subcarriers, and composes OFDM symbols through inverse fast Fourier transform (IFFT) operations and cyclic prefix (CP) insertion. In addition, for data reception, the baseband processor 11-20 divides the baseband signal provided from the RF processor 11-10 in units of OFDM symbols, recovers the signal mapped to the subcarrier through a fast Fourier transform (FFT) operation, and recovers the received bit stream through demodulation and decoding.

[0139] As described above, the baseband processor 11-20 and the RF processor 11-10 send and receive signals. The baseband processor 11-20 and the RF processor 11-10 may be referred to as a transmitter, a receiver, a transceiver, or a communication unit. In addition, in order to support different radio access technologies, at least one of the baseband processor 11-20 or the RF processor 11-10 may include a plurality of communication modules. In addition, in order to process signals of different frequency bands, at least one of the baseband processor 11-20 or the RF processor 11-10 may include different communication modules. For example, different radio access technologies may include wireless LANs (e.g., IEEE 802.11), cellular networks (e.g., LTE), and the like. In addition, different frequency bands may include ultra-high frequency (SHF) bands (e.g., 2.NRHz, NRHz) and millimeter wave (mmWave) bands (e.g., 60GHz).

[0140] The storage device 11-30 stores data such as configuration information, application programs, and basic programs for the operation of the UE. Specifically, the storage device 11-30 may store information about a second access node that performs wireless communication using a second radio access technology. The storage device 11-30 provides the stored data in response to a request from the controller 11-40.

[0141] The controller 11-40 controls the overall operation of the UE. For example, the controller 11-40 sends and receives signals through the baseband processor 11-20 and the RF processor 11-10. In addition, the controller 11-40 writes data to the storage device 11-30 or reads data from the storage device 11-30. To this end, the controller 11-40 may include at least one processor. For example, the controller 11-40 may include a communication processor (CP) for controlling communication and an application processor (AP) for controlling high layers such as application programs.

[0142] In addition, the controller 11 - 40 may control the operation of the UE according to various embodiments of the present disclosure.

[0143] FIG. 12 is a diagram showing a structure of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0144] As shown in the figure, the base station includes an RF processor 12-10, a baseband processor 12-20, a backhaul communication unit 12-30, a storage device 12-40, and a controller 12-50. In addition, the controller 12-50 may include a multi-connection processor 12-52.

[0145] The RF processor 12-10 performs functions such as signal band conversion and amplification for sending and receiving signals through a radio channel. That is, the RF processor 12-10 performs up-conversion of the baseband signal provided by the baseband processor 12-20 to an RF band signal and transmits the converted signal through an antenna, and performs down-conversion of the RF band signal received by the antenna to a baseband signal. For example, the RF processor 12-10 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, and an ADC. Although only one antenna is shown in the accompanying drawings, the first access node may be provided with multiple antennas. In addition, the RF processor 12-10 may include multiple RF chains. In addition, the RF processor 12-10 may perform beamforming. For beamforming, the RF processor 12-10 may adjust the phase and amplitude of each signal sent and received by multiple antennas or antenna elements. The RF processor may perform downlink MIMO operations by sending one or more layers.

[0146] The baseband processor 12-20 performs conversion between baseband signals and bit streams according to the physical layer specification of the first radio access technology. For example, for data transmission, the baseband processor 12-20 generates complex symbols by encoding and modulating the transmission bit stream. In addition, for data reception, the baseband processor 12-20 recovers the received bit stream by demodulating and decoding the baseband signal provided from the RF processor 12-10. For example, in the case of using OFDM, for data transmission, the baseband processor 12-20 generates complex symbols by encoding and modulating the transmission bit stream, maps the complex symbols to subcarriers, and composes OFDM symbols by IFFT operation and CP insertion. In addition, for data reception, the baseband processor 12-20 divides the baseband signal provided from the RF processor 12-10 in units of OFDM symbols, recovers the signal mapped to the subcarrier by FFT operation, and recovers the received bit stream by demodulation and decoding. As described above, the baseband processor 12-20 and the RF processor 12-10 send and receive signals. Therefore, the baseband processor 12-20 and the RF processor 12-10 may be referred to as a transmitter, a receiver, a transceiver, a communication unit, or a wireless communication unit.

[0147] The backhaul communication unit 12-30 provides an interface for communicating with other nodes in the network. That is, the backhaul communication unit 12-30 converts a bit stream to be sent from the base station to other nodes (eg, a secondary base station or a core network) into a physical signal, and converts a physical signal received from other nodes into a bit stream.

[0148] The storage device 12-40 stores data such as configuration information, applications, and basic programs for the operation of the base station. Specifically, the storage device 12-40 can store information about the bearers assigned to the connected UE and the measurement results reported from the connected UE. In addition, the storage device 12-40 can store information used as a criterion for determining whether to provide or suspend multiple connections to the UE. In addition, the storage device 12-40 provides the stored data in response to a request from the controller 12-50.

[0149] The controller 12-50 controls the overall operation of the base station. For example, the controller 12-50 sends and receives signals through the baseband processor 12-20 and the RF processor 12-10 or through the backhaul communication unit 12-30. In addition, the controller 12-50 writes data to the storage device 12-40 or reads data from the storage device 12-40. To this end, the controller 12-50 may include at least one processor.

[0150] In addition, the controller 12-50 may control the operation of the base station according to various embodiments of the present disclosure.

[0151] The methods according to the embodiments described in the claims or the specification of the present disclosure may be implemented in the form of hardware, software or a combination thereof.

[0152] When implemented in software, a computer-readable storage medium 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 executable by one or more processors of an electronic device. One or more programs may include instructions for causing the electronic device to perform the method according to the embodiments described in the claims or description of the present disclosure.

[0153] Such programs (software modules, software) may be stored in random access memory, non-volatile memory such as flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disk storage, compact disk ROM (CD-ROM), digital versatile disk (DVD), other types of optical storage devices, or magnetic tape. Alternatively, such programs may be stored in a memory including a combination of some or all of them. In addition, multiple component memories may be included.

[0154] In addition, such a program may be stored in an attachable storage device that can be accessed through a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WLAN), or a storage area network (SAN), or through a communication network including a combination thereof. Such a storage device can access the device that performs the embodiments of the present disclosure through an external port. In addition, a separate storage device on a communication network can access the device that performs the embodiments of the present disclosure.

[0155] In the embodiments of the present disclosure described above, the elements included in the present disclosure are expressed in singular or plural form according to the specific embodiments presented. However, singular or plural expression is appropriately selected for ease of description according to the presented situation, and the present disclosure is not limited to a single element or multiple elements. Those elements described in plural form can be configured as a single element, and those elements described in singular form can be configured as multiple elements.

[0156] At the same time, the embodiments of the present disclosure disclosed in this specification and the accompanying drawings are provided only as specific examples to easily explain the technical details of the present disclosure and help understand the present disclosure, and are not intended to limit the scope of the present disclosure. That is, it is obvious to those of ordinary skill in the art that other modifications based on the technical concept of the present disclosure can be performed. In addition, if the operation requires, some embodiments can be combined with each other. For example, an embodiment of the present disclosure and parts of other embodiments can be combined with each other to operate a base station and a UE. In addition, the embodiments of the present disclosure are applicable to other communication systems, and other modifications based on the technical concept of the embodiments can also be performed.

Claims

1. A method for a terminal in a wireless communication system, the method comprising: receiving a first radio resource control (RRC) message, the first RRC message including at least quality of experience (QoE) configuration information and information indicating that the QoE configuration information is related to a piece of signaling-based QoE configuration information; receiving a second RRC message for RRC connection release; Performing a QoE measurement operation according to at least one piece of QoE configuration information; as well as In a case where the terminal in the RRC idle state or the RRC inactive state is connected to the base station, a third RRC message including signaling-based QoE-related information is transmitted to the base station.

2. The method according to claim 1, in, The signaling-based QoE-related information includes at least one of information indicating that the terminal has signaling-based QoE configuration information that needs to be protected and information indicating that the terminal has a QoE measurement result collected according to the signaling-based QoE configuration information.

3. The method according to claim 1, in, The signaling-based QoE-related information is used to determine whether to configure the management-based QoE for the terminal.

4. The method according to claim 1, in, The third RRC message includes at least one of: information about the amount of QoE configuration information configured for the terminal, information about the amount of QoE configuration information that can be additionally configured for the terminal, information indicating that there are unreported QoE measurement results, information indicating that QoE configuration information visible to a radio access network (RAN) has been configured, and information about a service type of a previously configured QoE.

5. A method for a base station in a wireless communication system, the method comprising: receiving, while connected to a terminal in a radio resource control (RRC) idle state or an RRC inactive state, an RRC message including signaling-based quality of experience (QoE) related information from the terminal; receiving a request from a server for configuring management-based QoE; as well as Whether to configure management-based QoE for the terminal is determined according to the signaling-based QoE related information.

6. The method according to claim 5, in, The signaling-based QoE-related information includes at least one of information indicating that the terminal has signaling-based QoE configuration information that needs to be protected and information indicating that the terminal has a QoE measurement result collected according to the signaling-based QoE configuration information.

7. The method according to claim 5, in, Based on the signaling-based QoE-related information, the management-based QoE configuration is applied to one or more terminals other than the above-mentioned terminals.

8. The method according to claim 5, in, The RRC message includes at least one of: information about the amount of QoE configuration information configured for the terminal, information about the amount of QoE configuration information that can be additionally configured for the terminal, information indicating that there are unreported QoE measurement results, information indicating that QoE configuration information visible to a radio access network (RAN) has been configured, and information about a service type of a previously configured QoE.

9. A terminal in a wireless communication system, comprising: Transceiver; as well as Controller, Wherein the controller is configured to control: receiving a first radio resource control (RRC) message, the first RRC message including at least quality of experience (QoE) configuration information and information indicating that the QoE configuration information is related to a piece of signaling-based QoE configuration information; receiving a second RRC message for RRC connection release; Performing a QoE measurement operation according to at least one piece of QoE configuration information; and In a case where the terminal in the RRC idle state or the RRC inactive state is connected to the base station, a third RRC message including signaling-based QoE-related information is transmitted to the base station.

10. The terminal according to claim 9, in, The signaling-based QoE-related information includes at least one of information indicating that the terminal has signaling-based QoE configuration information that needs to be protected and information indicating that the terminal has a QoE measurement result collected according to the signaling-based QoE configuration information.

11. The terminal according to claim 9, in, The signaling-based QoE-related information is used to determine whether to configure the management-based QoE for the terminal.

12. The terminal according to claim 9, in, The third RRC message includes at least one of: information about the amount of QoE configuration information configured for the terminal, information about the amount of QoE configuration information that can be additionally configured for the terminal, information indicating that there are unreported QoE measurement results, information indicating that QoE configuration information visible to a radio access network (RAN) has been configured, and information about a service type of a previously configured QoE.

13. A base station in a wireless communication system, comprising: Transceiver; as well as Controller, Wherein the controller is configured to control: receiving, while connected to a terminal in a radio resource control (RRC) idle state or an RRC inactive state, an RRC message including signaling-based quality of experience (QoE) related information from the terminal; receiving a request from a server to configure management-based QoE; and Whether to configure management-based QoE for the terminal is determined according to the signaling-based QoE related information.

14. The base station according to claim 13, in, The signaling-based QoE-related information includes at least one of information indicating that the terminal has signaling-based QoE configuration information that needs to be protected and information indicating that the terminal has a QoE measurement result collected according to the signaling-based QoE configuration information.

15. The base station according to claim 13, in, Based on the signaling-based QoE-related information, the management-based QoE configuration is applied to one or more terminals other than the above-mentioned terminals.

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