QOS management method and device using NAS protocol

Abstract

The present disclosure relates to a communication technology and a system thereof for integrating a fifth generation (5G) communication system for supporting a higher data rate than a fourth generation (4G) system with an IoT technology. The present disclosure can be applied to smart services based on 5G communication technology and IoT-related technologies, such as smart homes, smart buildings, smart cities, smart cars, connected cars, healthcare, digital education, smart retail, security and safety services. A method for managing the quality of service (QoS) of a session by using a NAS protocol in a next generation 5G communication environment is disclosed.

Description

Technical Field

[0001] The present disclosure relates to a method or device for performing a function of managing the Quality of Service (QoS) of a session through a NAS protocol in a next-generation 5G communication environment. Background Art

[0002] In order to meet the demand for wireless data services that have increased since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Therefore, 5G or quasi-5G communication systems are also called "super 4G networks" or "post-LTE systems". 5G communication systems are considered to be implemented in higher frequency (millimeter wave) bands (such as 60GHz bands) in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple input multiple output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in 5G communication systems. In addition, in 5G communication systems, development of system network improvements is underway based on advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), receiving-end interference elimination, etc. In 5G systems, hybrid FSK and QAM modulation (FQAM) and sliding window superposition coding (SWSC) have been developed as advanced coded modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as advanced access technologies.

[0003] The Internet, which is a human-centered connected network in which people generate and consume information, is evolving into the Internet of Things (IoT), in which distributed entities (such as things) exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of IoT technology and big data processing technology through connection with cloud servers, has emerged. Because IoT implementation requires technical elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology" and "security technology", sensor networks, machine-to-machine (M2M) communication, machine type communication (MTC), etc. have been studied recently. Such an IoT environment can provide smart Internet technology services that create new value for human life by collecting and analyzing data generated between connected things. IoT can be applied to various fields including smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services through the integration and combination of existing information technology (IT) with various industrial applications.

[0004] In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine type communications (MTC), and machine-to-machine (M2M) communications can be implemented through beamforming, MIMO, and array antennas. Cloud radio access networks (RANs) as an application of the above-mentioned big data processing technologies can also be considered as an example of the fusion of 5G technologies and IoT technologies.

[0005] Recently, due to the development of the next-generation 5G communication environment, there is a need to study methods for managing the quality of service (QoS) of sessions using the NAS protocol. Summary of the invention

[0006] Technical issues

[0007] According to the emergence of 5G mobile communication, the network entity has been divided into AMF as a management entity for managing the mobility of UE and SMF as an entity for managing sessions. Therefore, unlike the operation scheme in which MME participates in management in traditional 4G LTE communication, the entities for managing mobility and managing sessions are separated from each other, so the communication scheme and communication management scheme between UE and network entities have changed. In 5G communication, mobility management is performed by AMF via N3IWF for non-3GPP access, and session management is performed by SMF. In addition, through AFM, not only mobility management but also security-related information, which is an important element of mobility management, can be processed. At the same time, in 4G, MME performs mobility management and session management to manage mobility and sessions. Entities for communication of 4G and 5G may exist in 5G communication and 5G communication schemes, and 5G communication may be performed using some 4G communication entities in a non-independent architecture.

[0008] Therefore, the present disclosure proposes a method for managing session QoS using a non-access stratum (NAS) protocol in 5G communication when communication is performed using the NAS protocol.

[0009] Solution to the problem

[0010] According to one aspect of the present disclosure to solve the problem, a communication method of a UE in a wireless communication system includes: requesting Quality of Service (QoS) related information from a network; and receiving a response message to the request from the network.

[0011] According to another aspect of the present disclosure, a method for a UE in a system includes: sending a protocol data unit (PDU) session modification request message for configuring a separation QoS flow to a session management function (SMF); and based on the PDU session modification request message, receiving a PDU session modification command message including an authorized QoS rule from the SMF.

[0012] Advantageous Effects of the Invention

[0013] Through the present disclosure, the NAS protocol can be used in a 5G communication environment to effectively manage session QoS and perform communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An example of a UE and a network environment for managing session QoS of the UE and the network in a 5G network according to an embodiment of the present disclosure is shown;

[0015] Figure 2 An embodiment for processing QoS management of a session between a UE and a network according to an embodiment of the present disclosure, and a communication process and method using a NAS protocol in a 5G network environment are shown;

[0016] Figure 3 An embodiment for processing QoS management of a session between a UE and a network according to an embodiment of the present disclosure, and a communication process and method using a NAS protocol in a 5G network environment are shown;

[0017] Figure 4 An embodiment of the management of QoS for processing sessions of UE and network according to an embodiment of the present disclosure, and a communication process and method using the NAS protocol in a 5G network environment are shown;

[0018] Figure 5 An embodiment for processing QoS management of a session between a UE and a network according to an embodiment of the present disclosure, and a communication process and method using a NAS protocol in a 5G network environment are shown;

[0019] Figure 6 The structure of a UE according to an embodiment of the present disclosure is shown;

[0020] Figure 7 shows the structure of a network entity according to an embodiment of the present disclosure; and

[0021] Figure 8 An embodiment of processing QoS management for sessions between UE and network according to an embodiment of the present disclosure, as well as a communication process and method using the NAS protocol in a 5G network environment are shown. DETAILED DESCRIPTION

[0022] 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 accompanying 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.

[0023] When describing the embodiments of the present disclosure, descriptions related to technical contents that are well known in the art and not directly related to the present disclosure will be omitted. The omission of such unnecessary descriptions is intended to prevent the main idea of ​​the present disclosure from being obscured and to convey the main idea more clearly.

[0024] For the same reason, in the accompanying drawings, some elements may be enlarged, omitted or schematically shown. In addition, the size of each element does not fully reflect the actual size. In the accompanying drawings, the same or corresponding elements have the same reference numerals.

[0025] 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 clear. 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 limited only by the scope of the attached claims. Throughout the specification, the same or similar reference numerals represent the same or similar elements.

[0026] In the following description, for the sake of convenience, terms used to identify access nodes, terms related to network entities, 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 with equivalent technical meanings may be used.

[0027] In the following description, for the convenience of description, the present disclosure will be described using terms and names defined in the 3rd Generation Partnership Project Long Term Evolution (3GPP LTE) standard. 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.

[0028] That is, the following detailed description of the embodiments of the present disclosure will be mainly directed to the communication standards defined by 3GPP. However, based on the determination of those skilled in the art, through some modifications, the main ideas of the present disclosure may also be applied to other communication systems with similar technical backgrounds without significantly departing from the scope of the present disclosure.

[0029] Figure 1 An example of a UE and a network environment for a communication process and a method of performing secure communication using some of 4G or 5G entities in a 5G or 4G network according to an embodiment of the present disclosure is shown.

[0030] In an embodiment of the present disclosure, based on the assumption of a 5G network, a user plane function (UPF), a session management function (SMF), an access and mobility management function (AMF), a 5G radio access network (RAN), a user data management (UDM), a policy control function (PCF), etc. are included in the network system. At the same time, an authentication server function (AUSF) and authentication, authorization, and accounting (AAA) also exist in the system to authenticate entities.

[0031] For the case where the UE communicates via non-3GPP access, there is an N3 interworking function (N3IWF). Through non-3GPP access, session management is controlled by the UE, non-3GPP access, N3IWF and SMF, and control is performed by the UE, non-3GPP access, N3IWF and AMF for mobility management.

[0032] In the embodiments of the present disclosure, it is assumed that 5G and 4G LTE systems coexist. In LTE, there is an MME for performing mobility management and session management. The MME controls the communication of the UE. In 5G, the mobility management and session management entities are divided into AMF and SMF. At the same time, an independent deployment structure that only performs communication with a 5G communication entity for 5G communication and a non-independent deployment structure that uses 4G and 5G entities for 5G communication are also considered.

[0033] like Figure 1 As shown, in the communication between UE and the network, deployment in the form of eNB and 5G entities using the core network is possible for control. In this case, when the UE and AMF perform mobility management for NAS as layer 3 and the UE and SMF perform session management, the AS as layer 2 is sent through the UE and eNB, so a method for generating and managing a security context is required. Therefore, the present disclosure describes the generation and management of security contexts and the exchange of protocols that can be applied to such deployment scenarios.

[0034] The communication network of the present disclosure assumes networks of 5G and 4G LTE, but the communication network may be applied to a case where the same concept is applied to another system within a scope that can be understood by those skilled in the art.

[0035] (Method 1)

[0036] Figure 2 An embodiment of processing QoS management for sessions between UE and network according to an embodiment of the present disclosure, as well as a communication process and method using the NAS protocol in a 5G network environment are shown.

[0037] In operation 201, the UE sends a registration request message to the AMF.

[0038] In operation 203, the AMF sends a registration response message to the UE.

[0039] Thereafter, operation 205 is related to the UE's request for a separation QoS flow. For example, when the UE requests a separation QoS flow in operation 205, the UE may request the network for the UE's desired QoS flow configuration through a protocol data unit (PDU) session modification transmission, and the network may allow or approve the requested QoS flow.

[0040] Priority may be a value used by the network to configure the priority of a flow. In addition, priority may be a value used by the network to manage each flow. When priority is configured, the value sent by the UE may be a reference value when the network manages the flow. Meanwhile, in another embodiment, when the UE notifies the flow of an application executed in the background and the service or an application that should be sent with the best effort through a separation bit so that they can be managed with a specific flow, the network can effectively manage the corresponding flow.

[0041] According to an embodiment, when the UE requests separation of a flow, for example, when the separation bit is set to 1 and is separation-requested when the UE sends a PDU session modification request to the SMF, the UE may set the QoS rule priority field of the QoS rule information element requested in the PDU session modification request message to 0 (decimal) and send the PDU session modification request message.

[0042] According to another embodiment, when the UE requests to detach a flow, for example, when the detach bit is set to 1 and detach is requested (i.e., when detach is requested when the UE sends a PDU session modification request to the SMF), the UE may set the QoS rule priority field of the QoS rule information element requested in the PDU session modification request message to a specific value other than a value between 70 and 99 (decimal), and send the PDU session modification request message.

[0043] The operation of UE requesting to separate the flow is expressed in English as follows.

[0044]

Table 200

[0045]

[0046] The UE may set the priority value in the PDU session modification request message to 0 or a specific value and send the message to the SMF. For example, the UE may set the priority value of the requested QoS rule information element of the PDU session modification request to 0 or a specific value and send the message to the SMF.

[0047] According to another embodiment, since the priority value is a value set and sent by the network, the UE can set the priority value field in the PDU session modification request message to 0, and can send the message to the SMF or not.

[0048] In operation 205, the UE may send a PDU session modification request message to the SMF via the AMF.

[0049] Table 1: PDU Session Modification Request

[0050]

[0051]

[0052] In operation 207, the SMF sends a PDU session modification command to the UE.

[0053] Table 2 PDU session modification command PDU session modification command message content

[0054]

[0055]

[0056] Table 3 QoS rules: priority value

[0057]

[0058] Table 4 QoS rule analysis method QoS rule information elements

[0059]

[0060] (Method 2)

[0061] Figure 3 An embodiment of processing QoS management for sessions between UE and network according to an embodiment of the present disclosure, as well as a communication process and method using the NAS protocol in a 5G network environment are shown.

[0062] In operation 301, the UE sends a registration request message to the AMF.

[0063] In operation 303, the AMF sends a registration response message to the UE.

[0064] In operation 305, the UE sends a PDU session modification request message to the SMF via the AMF.

[0065] The following operations are related to the UE's request for separating a QoS flow. For example, in the process of the UE requesting to separate a QoS flow, the UE may request the UE's desired QoS flow configuration through the PDU session modification procedure, and the network may allow the requested QoS flow.

[0066] Priority may be a value for the network to configure the priority of a flow. In addition, priority may be a value for the network to manage each flow. When priority is configured, the value sent by the UE may be a reference value when the network manages the flow. Meanwhile, in another embodiment, when the UE notifies the application executed in the background and the service or the flow of the application that should be sent with the best effort through the separation bit so as to manage them with a specific flow, the network can effectively manage the corresponding flow.

[0067] At this time, the UE can send a PDU session modification request message without a priority value to the SMF.

[0068] In other words, the UE may not send a priority value to the SMF.

[0069] In an embodiment, since the priority value is a value set and sent by the network, the priority value field in the PDU session modification request message sent by the UE may be set to 0 and sent to the SMF, or the UE may not send the priority value.

[0070] According to an embodiment, when the UE requests to detach a flow, for example, when the detach bit is set to 1 and is detached requested while the UE sends a PDU session modification request to the SMF, the priority is not included in the PDU session modification request message. That is, according to an embodiment, the UE may send a PDU session modification request message without a priority value to the SMF. In other words, the UE may send a PDU session modification request without a priority value of the requested QoS rule information element to the SMF.

[0071] In operation 307, the SMF sends a PDU session modification command to the UE.

[0072] (Method 3, Case 1) Separate Stream for Reuse

[0073] Figure 4 An embodiment of processing QoS management for sessions between UE and network according to an embodiment of the present disclosure, as well as a communication process and method using the NAS protocol in a 5G network environment are shown.

[0074] Hereinafter, a case where the UE requests to generate a separate stream again after the UE requested to generate a separate stream in a previous process will be described. When a separate stream exists in the previous process, only one separate stream is allowed, so the UE cannot request to generate a separate stream additionally.

[0075] However, when a separate flow has been generated, the conventional separate flow may be reused. For example, in order to reuse a previous separate flow, the UE may reuse the previous separate flow without the QoS parameters of the separate flow.

[0076] In operation 401, the UE sends a registration request message to the AMF.

[0077] In operation 403, the AMF sends a registration response message to the UE.

[0078] In operation 405, the UE sends a PDU session modification request message to the SMF via the AMF.

[0079] The following operations are related to the UE's request for separating the QoS flow. According to an embodiment of the present disclosure, when the UE requests to separate the QoS flow in operation 405, the UE may request the network for the UE's desired QoS flow configuration through PDU session modification transmission, and the network may allow the requested QoS flow.

[0080] According to the embodiment, when the UE notifies the application executed in the background and the service or the flow of the application that should be sent with the best effort through separation bits so as to manage them with a specific flow, the network can effectively manage the corresponding flow.

[0081] At this time, according to an embodiment, since the number of separate QoS flows that the UE can request is only 1, if there is a predefined separate flow, the PDU session modification request message sent by the UE to the SMF does not include the QoS parameters to be allocated, so that the UE requests that the service data flow be additionally allocated to the corresponding separate QoS flow.

[0082] For example, when the Detach bit is set to 1 and a Detach is requested (i.e., when a Detach is requested in a PDU Session Modification Request message sent to the SMF), if the requested QoS flow identifier is the same as the QoS flow identifier previously requested by Detach QoS flow, the requested QoS flow description included in the PDU Session Modification Request message sent by the UE to the SMF does not include the QoS parameters of the QoS flow identifier.

[0083] Alternatively, in an embodiment, when the detach bit is set to 1 and detach is requested in a PDU session modification request message sent by the UE to the SMF, and the requested QoS flow identifier is the same as the QoS flow identifier previously requested by detaching the QoS flow, the UE may not insert the QoS flow description into the QoS flow identifier of the requested QoS flow description included in the PDU session modification request message and send the message to the SMF.

[0084] In operation 407, the SMF sends a PDU session modification command to the UE.

[0085] (Method 4, Case 2) Case where the separated flow is reused and includes QoS parameters

[0086] Figure 5An embodiment of processing QoS management for sessions between UE and network according to an embodiment of the present disclosure, as well as a communication process and method using the NAS protocol in a 5G network environment are shown.

[0087] Hereinafter, a case where the UE requests to generate a separate stream again after the UE requested to generate a separate stream in a previous process will be described. When a separate stream exists in the previous process, only one separate stream is allowed, so the UE cannot request to generate a separate stream additionally.

[0088] However, when a separate flow has been generated, the UE can insert the QoS parameters into the PDU Session Modification message and send the message to the SMF in order to reuse the separate flow. For example, the ID of the separate flow is the same, but the QoS characteristics are different.

[0089] In operation 501, the UE sends a registration request message to the AMF.

[0090] In operation 503, the AMF sends a registration response message to the UE.

[0091] In operation 505, the UE sends a PDU session modification request message to the SMF via the AMF.

[0092] The following operations are related to the UE's request for separating the QoS flow. According to an embodiment of the present disclosure, when the UE requests to separate the QoS flow in operation 505, the UE may request the network for the UE's desired QoS flow configuration through PDU session modification transmission, and the network may allow the requested QoS flow.

[0093] That is, when the UE notifies the applications executed in the background and in the service or the flows of the applications that should be sent with the best effort through separation bits so as to manage them with specific flows, the network can effectively manage the corresponding flows.

[0094] At this time, according to an embodiment, since the number of separate QoS flows that the UE can request is only 1, when there is a predefined separate flow, the UE can insert the QoS parameters to be allocated into the PDU session modification request message to request the SMF to additionally allocate the service data flow to the corresponding separate QoS flow, send the message to the SMF, and change and use the QoS-related characteristics of the traditional separate QoS flow.

[0095] For example, when the separation bit is set to 1 and separation is requested, that is, when separation is requested in the PDU session modification request message sent by the UE to the SMF, if the requested QoS flow identifier is the same as the QoS flow identifier previously requested by separating the QoS flow, the UE may not insert the QoS parameters to be allocated into the QoS flow identifier of the requested QoS flow description included in the PDU session modification request message and send the message to the SMF. At this time, the traditional flow characteristics may be changed or may be used without any change.

[0096] For example, when the separation bit is set to 1 and is separated in the PDU session modification request message sent to the SMF, if the requested QoS flow identifier is the same as the QoS flow identifier previously requested by separating the QoS flow, the UE can change the QoS flow description associated with the QoS flow identifier and send a PDU session modification request message including the changed QoS flow description to the SMF. At this time, the UE uses the same separation flow, but can change and use its characteristics.

[0097] In operation 507, the SMF sends a PDU session modification command to the UE.

[0098] Figure 6 The structure of a UE according to an embodiment of the present disclosure is shown.

[0099] refer to Figure 6 , the UE may include a transceiver 610, a controller 620, and a storage unit 630. In the present disclosure, the controller may be defined as a circuit, an application specific integrated circuit, or at least one processor.

[0100] The transceiver 610 may transmit / receive a signal to / from another network entity. The transceiver 610 may receive, for example, system information from a BS, and receive a synchronization signal or a reference signal.

[0101] The controller 620 may control the overall operation of the UE according to the embodiment proposed in the present disclosure. For example, the controller 620 may control the signal flow between blocks to perform operations according to the above flowchart.

[0102] The storage unit 630 may store at least one piece of information transmitted and received through the transceiver 610 and information generated by the controller 620 .

[0103] Figure 7 The structure of a network entity according to an embodiment of the present disclosure is shown.

[0104] Figure 7 The network entities shown may be Figures 1 to 5 and Figure 8 For example, a network entity may be Figures 1 to 5 and Figure 8 AMF or SMF as shown.

[0105] refer to Figure 7 , the network entity may include a transceiver 710, a controller 720, and a storage unit 730. In the present disclosure, a controller may be defined as a circuit, an application specific integrated circuit, or at least one processor.

[0106] The transceiver 710 may send and receive signals to and from a UE or another network entity. The controller 720 may control the overall operation of the eNB according to the embodiment proposed in the present disclosure. For example, the controller 720 may control the signal flow between blocks to perform operations according to the above-mentioned flowchart. The storage unit 730 may store at least one piece of information sent and received by the transceiver 710 and information generated by the controller 720.

[0107] (Method 5)

[0108] Figure 8 An embodiment of processing QoS management for sessions between UE and network according to an embodiment of the present disclosure, as well as a communication process and method using the NAS protocol in a 5G network environment are shown.

[0109] In the following, the case where the network uses only a single dedicated QoS flow for service separation will be described. That is, when the UE requests service separation of multiple service data flows to handle other QoS, the SMF binds (maps) the multiple service data flows to a single QoS flow. Therefore, the SMF should generate a new authorized QoS rule for a single QoS flow and allow service separation of the service data flow based on the new authorized QoS rule. In addition, the SMF should delete the packet filter of the service data flow included in the separation flow from other authorized QoS rules.

[0110] In operation 801, the UE sends a registration request message to the AMF.

[0111] In operation 803, the AMF sends a registration response message to the UE.

[0112] In operation 805, the UE sends a PDU session modification request message to the SMF via the AMF.

[0113] The following operations are related to the UE's request for separating the QoS flow. For example, when the UE requests to separate the QoS flow in operation 805, the UE may request the network for the UE's desired QoS flow configuration through the PDU session modification transmission, and the network may allow the requested QoS flow. When the UE notifies the application executed in the background and the service or the flow of the application that should be sent with the best effort through the separation bit so that they are managed with a specific flow, the network can effectively manage the corresponding flow.

[0114] According to an embodiment, in order to request that the service data flow be additionally allocated to the corresponding separated QoS flow, the UE sets the separation bit included in the PDU session modification request message to 1 and sends the message to the SMF.

[0115] That is, in an embodiment, when the separation bit is set to 1 and separation is requested (i.e., when separation is requested in a PDU session modification request message sent by the UE to the SMF), the UE can insert the characteristics of the QoS flow into the information element (parameter) corresponding to the requested QoS flow description included in the PDU session modification request message and send the message to the SMF.

[0116] At this time, the QoS flow identifier included in the QoS rule information element in the PDU session modification request message may be an existing QoS flow identifier that is allocated to the UE by the network and then stored in the UE.

[0117] Alternatively, the QoS flow identifier included in the QoS rules information element in the PDU session modification request message may be spare or zero.

[0118] In operation 807, the UE sends another PDU session modification request to the SMF.

[0119] At this point, the UE can request another service data flow by separating the flow. For example, the UE can set the separation bit to 1 in the QoS rule information element of the PDU session modification message and send a PDU session modification request to the SMF.

[0120] In operation 809, the SMF sends a PDU session modification command to the UE.

[0121] At this time, when the UE requests service separation of multiple service data flows to process other QoS in operations 805 and 807, the SMF binds (maps) the multiple service data flows to a single QoS flow. Therefore, the SMF should generate a new authorized QoS rule for the single QoS flow and allow service separation of the service data flow based on the new authorized QoS rule. The SMF should delete the packet filter of the service data flow included in the separation flow from other authorized rules.

[0122] Therefore, SMF should generate a new QoS flow and include the authorized QoS flow description of the QoS flow. At this point, the following describes the conditions under which SMF generates new authorized QoS rules and inserts the new authorized QoS flow description into the authorized QoS flow description IE in the PDU session modification command message.

[0123] - Generate newly generated authorized QoS rules for dedicated QoS flows for use in case of traffic separation.

[0124] That is, when a newly generated authorized QoS rule is generated for a dedicated QoS flow for service separation, the SMF should generate a new QoS flow and insert the authorized QoS flow description information element into the QoS flow. Therefore, when a newly generated authorized QoS rule is generated by the SMF for a dedicated QoS flow for service separation, the SMF generates a new authorized QoS rule, inserts the new authorized QoS flow description into the authorized QoS flow description IE in the PDU Session Modification Command message, and sends the message to the UE.

[0125] This is expressed in English below as

[0126]

Table 800

[0127]

[0128] 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 to the presented situation, and the present disclosure is not limited to the elements expressed in the singular or plural form. 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.

[0129] Although specific embodiments have been described in the detailed description of the present disclosure, various modifications and changes may be made to the specific embodiments without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the embodiments, but should be defined by the appended claims and their equivalents.

Claims

1. A method performed by a terminal in a wireless communication system, the method comprising: Sending a protocol data unit (PDU) session modification request message to a session management function (SMF), wherein the PDU session modification request message includes information about the requested quality of service (QoS) rule; as well as receiving from the SMF a PDU SESSION MODIFY COMMAND message as a response to the PDU SESSION MODIFY REQUEST message, wherein the information about the requested QoS rule includes information about the separated bits and information about a priority value of the requested QoS rule in at least one QoS rule, and The bit information about the separation indicates whether the terminal requests to bind the service data flow described by the QoS rule to the dedicated QoS flow.

2. The method according to claim 1, wherein: In case the UE requests a new QoS rule, assigning information about the priority value for the QoS rule, and Here, the information on the priority value is not in the range from 70 to 99.

3. The method according to claim 1, wherein: In case the bit information about separation is set to 1, the terminal requests the SMF to bind at least one service data flow described by the requested QoS rule to a dedicated QoS flow.

4. A method performed by a session management function SMF in a wireless communication system, the method comprising: receiving a protocol data unit (PDU) session modification request message from a terminal, wherein the PDU session modification request message includes information about a requested quality of service (QoS) rule, and the information about the requested QoS rule includes information about separated bit information and information about a priority value of the requested QoS rule in at least one QoS rule; as well as Send a PDU session modification command message to the terminal, The bit information about the separation indicates whether the terminal requests to bind the service data flow described by the QoS rule to the dedicated QoS flow.

5. The method according to claim 4, in, In case the UE requests a new QoS rule, assigning information about the priority value for the QoS rule, and Here, the information on the priority value is not in the range from 70 to 99.

6. The method according to claim 4, wherein: In case the bit information about separation is set to 1, the terminal requests the SMF to bind at least one service data flow described by the requested QoS rule to a dedicated QoS flow.

7. A terminal in a wireless communication system, the terminal comprising: a transceiver configured to send signals to and receive signals from a session management function SMF; as well as A controller configured to perform control to send a protocol data unit (PDU) session modification request message to the SMF, wherein the PDU session modification request message includes information about the requested quality of service (QoS) rule, and receiving from the SMF a PDU SESSION MODIFY COMMAND message as a response to the PDU SESSION MODIFY REQUEST message, wherein the information about the requested QoS rule includes information about the separated bits and information about a priority value of the requested QoS rule in at least one QoS rule, and The bit information about the separation indicates whether the terminal requests to bind the service data flow described by the QoS rule to the dedicated QoS flow.

8. The terminal according to claim 7, wherein: In case the UE requests a new QoS rule, assigning information about the priority value for the QoS rule, and Here, the information on the priority value is not in the range from 70 to 99.

9. The terminal according to claim 7, wherein: In case the bit information about separation is set to 1, the terminal requests the SMF to bind at least one service data flow described by the requested QoS rule to a dedicated QoS flow.

10. A session management function SMF in a wireless communication system, the SMF comprising: a transceiver configured to send signals to and receive signals from a terminal; as well as a controller configured to perform control to receive a protocol data unit (PDU) session modification request message from a terminal and send a PDU session modification command message to the terminal, The PDU session modification request message includes information about the requested quality of service QoS rule, and the information about the requested QoS rule includes information about the separated bit information and information about the priority value of the requested QoS rule in at least one QoS rule, and The bit information about the separation indicates whether the terminal requests to bind the service data flow described by the QoS rule to the dedicated QoS flow.

11. The SMF according to claim 10, in, In case the UE requests a new QoS rule, assigning information about the priority value for the QoS rule, and Here, the information on the priority value is not in the range from 70 to 99.

12. The SMF of claim 10, wherein: In case the bit information about separation is set to 1, the terminal requests the SMF to bind at least one service data flow described by the requested QoS rule to a dedicated QoS flow.

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