CN113661730A

CN113661730A - QOS management method and apparatus using NAS protocol

Info

Publication number: CN113661730A
Application number: CN202080026215.4A
Authority: CN
Inventors: 徐庆珠; 朴重信
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 2019-03-29
Filing date: 2020-03-30
Publication date: 2021-11-16
Also published as: KR20200114932A

Abstract

The present disclosure relates to a communication technology for merging a 5 th generation (5G) communication system for supporting a higher data rate than a 4 th generation (4G) system with a technology for IoT and a system thereof. The present disclosure may be applied to smart services based on 5G communication technologies and IoT related technologies, such as smart homes, smart buildings, smart cities, smart cars, networked cars, healthcare, digital education, smart retail, security, and security services. Disclosed is a method for managing quality of service (QoS) of a session by using a NAS protocol in a next generation 5G communication environment.

Description

QOS management method and apparatus using NAS protocol

Technical Field

The present disclosure relates to an apparatus for performing a method or function of managing quality of service (QoS) of a session by a NAS protocol in a next generation 5G communication environment.

Background

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. Accordingly, the 5G or quasi-5G communication system is also referred to as a "super 4G network" or a "post-LTE system". The 5G communication system is considered to be implemented in a higher frequency (millimeter wave) band (for example, 60GHz band) in order to achieve a higher data rate. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming, massive antenna techniques are discussed in the 5G communication system. Further, in the 5G communication system, development of improvement of the system network is ongoing based on advanced small cells, cloud Radio Access Network (RAN), ultra dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multipoint (CoMP), reception side interference cancellation, and the like. In 5G systems, hybrid FSK and QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) have been developed as Advanced Coding Modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and Sparse Code Multiple Access (SCMA) as advanced access techniques.

The internet, which is a human-centric connected network in which humans generate and consume information, is evolving into the internet of things (IoT) where distributed entities, such as things, exchange and process information without human intervention. Internet of everything (IoE) has emerged as a combination of IoT technology and big data processing technology through connection with cloud servers. Since IoT implementations require 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 recently researched. Such an IoT environment can provide intelligent internet technology services that create new value for human life by collecting and analyzing data generated between interconnected things. IoT may be applied in various fields including smart homes, smart buildings, smart cities, smart cars or networked cars, smart grids, healthcare, smart homes, and advanced medical services through the fusion and combination of existing Information Technology (IT) with various industrial applications.

Consistent with this, various attempts have been made to apply the 5G communication system to the IoT network. For example, technologies such as sensor networks, Machine Type Communication (MTC), and machine-to-machine (M2M) communication may be implemented through beamforming, MIMO, and array antennas. The application of cloud Radio Access Network (RAN) as the big data processing technology described above can also be considered as an example of the convergence of 5G technology and IoT technology.

Recently, due to the development of the next generation 5G communication environment, there is a need to study a method of managing quality of service (QoS) of a session using a NAS protocol.

Disclosure of Invention

Technical problem

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

Accordingly, the present disclosure proposes a method of managing session QoS using a non-access stratum (NAS) protocol in 5G communication when communication is performed using the NAS protocol.

Solution to the problem

According to an 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.

According to another aspect of the disclosure, a method of a UE in a system includes: sending a Protocol Data Unit (PDU) session modification request message for configuring a split (segregation) QoS flow to a Session Management Function (SMF); and receiving a PDU session modification command message including an authorized QoS rule from the SMF based on the PDU session modification request message.

Advantageous effects of the invention

With the present disclosure, it is possible to effectively manage session QoS and perform communication using a NAS protocol in a 5G communication environment.

Drawings

Fig. 1 illustrates an example of a UE and network environment for managing session QoS of the UE and network in a 5G network according to an embodiment of the present disclosure;

fig. 2 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment, according to an embodiment of the present disclosure;

fig. 3 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment, according to an embodiment of the present disclosure;

FIG. 4 illustrates an embodiment of a management for handling QoS for sessions of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment, according to an embodiment of the present disclosure;

fig. 5 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment, according to an embodiment of the present disclosure;

fig. 6 illustrates a structure of a UE according to an embodiment of the present disclosure;

fig. 7 illustrates a structure of a network entity according to an embodiment of the present disclosure; and

fig. 8 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment according to an embodiment of the present disclosure.

Detailed Description

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

In describing the embodiments of the present disclosure, a description related to technical contents which are well known in the art and are not directly related to the present disclosure will be omitted. Omission of such unnecessary description is intended to prevent obscuring the main ideas of the present disclosure, and to convey them more clearly.

For the same reason, in the drawings, some elements may be enlarged, omitted, or schematically shown. Further, the size of each element does not completely reflect the actual size. In the drawings, the same or corresponding elements have the same reference numerals.

Advantages and features of the present disclosure and the manner of attaining them will become apparent by reference to the following detailed description of embodiments when taken in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments set forth below, but may be implemented in various different forms. The following examples are provided solely for the purpose of complete disclosure and to inform those skilled in the art of the scope of the disclosure, and the disclosure is to be limited only by the scope of the appended claims. Throughout the specification, the same or similar reference numerals denote the same or similar elements.

In the following description, terms for identifying an access node, terms related to network entities, terms related to messages, terms related to interfaces between network entities, terms related to various identification information, and the like are illustratively used for convenience. Accordingly, the present disclosure is not limited by the terms used below, and other terms related to the subject matter having an equivalent technical meaning may be used.

In the following description, for convenience of description, the present disclosure will be described using terms and names defined in the third generation partnership project long term evolution (3GPP LTE) standard. However, the present disclosure is not limited to these terms and names, and may be applied to systems conforming to other standards in the same manner.

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

Fig. 1 illustrates 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.

In the embodiment of the present disclosure, based on the assumption of the 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), and the like 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 the entity.

For the case where the UE communicates over a non-3 GPP access, there is an N3 interworking function (N3 IWF). With non-3 GPP access, session management is controlled by UE, non-3 GPP access, N3IWF and SMF, and control is performed by UE, non-3 GPP access, N3IWF and AMF for mobility management.

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, mobility management and session management entities are divided into AMF and SMF. Meanwhile, an independent deployment structure in which only communication with a 5G communication entity is performed for 5G communication and a dependent deployment structure in which 4G and 5G entities are used for 5G communication are also considered.

As shown in fig. 1, deployment in the form of eNB and 5G entities using a core network is possible for control in communication between a UE and a network. In this case, when mobility management is performed for the UE and the AMF AS NAS of layer 3 and session management is performed for the UE and the SMF, AS layer 2 is transmitted through the UE and the eNB, and thus a method of generating and managing a security context is required. Thus, the present disclosure describes the generation and management of security contexts and the exchange of protocols that may be applied to such deployment scenarios.

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

(method 1)

Fig. 2 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment according to an embodiment of the present disclosure.

In operation 201, the UE transmits a registration request message to the AMF.

In operation 203, the AMF transmits a registration response message to the UE.

Thereafter, operation 205 relates to a request by the UE to split QoS flows (segregation QoS flows). For example, when the UE requests the detachment of the QoS flow in operation 205, the UE may request a QoS flow configuration desired by the UE from the network through a Protocol Data Unit (PDU) session modification transmission, and the network may allow or approve the requested QoS flow.

The precedence may be a value of priority used by the network to configure the flow. Further, the priority may be a value for the network to manage each flow. When configuring the priority, the value transmitted by the UE may be a reference value when the network manages the flow. Meanwhile, in another embodiment, when the UE informs the flows of applications executing in the background (background) and traffic or applications that should be transmitted with the best effort by a split bit in order to manage them with a specific flow, the network can efficiently manage the corresponding flow.

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

According to another embodiment, when the UE requests a detach flow, for example, when the detach bit is set to 1 and is detached to be requested (i.e., detachment is requested when the UE transmits a PDU session modification request to the SMF), the UE may set a QoS rule priority field of a requested QoS rule information element in the PDU session modification request message to a specific value between 70 and 99 (decimal) except 80 (decimal) and transmit the PDU session modification request message.

The operation of the UE requesting a separate stream is expressed in english as follows.

[ TABLE 200 ]

The UE may set a priority value in the PDU session modify request message to 0 or a specific value and transmit 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.

According to another embodiment, since the priority value is a value set and transmitted by the network, the UE may set a priority value field in the PDU session modification request message to 0 and may or may not transmit the message to the SMF.

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

Table 1: PDU session modification request

In operation 207, the SMF sends a PDU session modify command to the UE.

Table 2 PDU session modification command

PDU session modification command message content

Table 3 QoS rules: priority value

QoS rule (z +2 ═ u)

TABLE 4 QoS rule analysis method

QoS rule information element

(method 2)

Fig. 3 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment according to an embodiment of the present disclosure.

In operation 301, the UE transmits a registration request message to the AMF.

In operation 303, the AMF transmits a registration response message to the UE.

In operation 305, the UE transmits a PDU session modification request message to the SMF via the AMF.

The following operations relate to a UE request to separate QoS flows. For example, in a process in which the UE requests the detachment of the QoS flow, the UE may request a QoS flow configuration desired by the UE through a PDU session modification procedure, and the network may allow the requested QoS flow.

The priority may be a value of priority for the network configuration flow. Further, the priority may be a value for the network to manage each flow. When configuring the priority, the value transmitted by the UE may be a reference value when the network manages the flow. Meanwhile, in another embodiment, when the UE informs the flows of applications executing in the background and traffic or applications that should be transmitted with the best effort by the split bit so as to manage them with a specific flow, the network can efficiently manage the corresponding flow.

At this time, the UE may transmit a PDU session modification request message without a priority value to the SMF.

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

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

According to an embodiment, when the UE requests to detach the stream, for example, when the detach bit is set to 1 and is detached while the UE transmits the PDU session modification request to the SMF, priority is not included in the PDU session modification request message. That is, according to an embodiment, the UE may transmit 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 to the SMF that does not contain the priority value of the requested QoS rule information element.

In operation 307, the SMF transmits a PDU session modify command to the UE.

(method 3, case 1) Split stream reuse

Fig. 4 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment according to an embodiment of the present disclosure.

Hereinafter, a case where the UE requests generation of the separate stream again after the generation of the separate stream is requested by the UE in the previous procedure will be described. When there is a separate stream in the previous procedure, only one separate stream is allowed, and thus the UE cannot request additional generation of the separate stream.

However, when the separate stream has been generated, the conventional separate stream can be reused. For example, to reuse a previous separated flow, the UE may reuse the previous separated flow without the QoS parameters of the separated flow.

In operation 401, the UE transmits a registration request message to the AMF.

In operation 403, the AMF transmits a registration response message to the UE.

In operation 405, the UE transmits a PDU session modification request message to the SMF via the AMF.

The following operations relate to a UE request to separate QoS flows. According to an embodiment of the present disclosure, when the UE requests the detachment of the QoS flow in operation 405, the UE may request the network for a QoS flow configuration desired by the UE through the PDU session modification transmission, and the network may allow the requested QoS flow.

According to the embodiment, when the UE informs the flows of applications executing in the background and traffic or applications that should be transmitted with the best effort by the split bit so as to manage them with a specific flow, the network can efficiently manage the corresponding flow.

At this time, according to the 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 that the UE transmits to the SMF does not include a QoS parameter to be allocated, so that the UE requests additional allocation of a service data flow to the corresponding separate QoS flow.

For example, when the detach bit is set to 1 and is detached to be requested (i.e., when detachment is requested in the PDU session modification request message transmitted to the SMF), if the requested QoS flow identifier is the same as the QoS flow identifier previously requested by the detached QoS flow, the requested QoS flow included in the PDU session modification request message transmitted by the UE to the SMF describes the QoS parameter excluding the QoS flow identifier.

Alternatively, in an embodiment, when the detach bit is set to 1 and is detached from the PDU session modification request message transmitted 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 transmit the message to the SMF.

In operation 407, the SMF sends a PDU session modify command to the UE.

(method 4, case 2) case where the separate flow is reused and includes QoS parameters

Fig. 5 illustrates an embodiment for handling management of QoS for a session of a UE and a network, and a communication process and method using NAS protocol in a 5G network environment according to an embodiment of the present disclosure.

However, when the detached flow has been generated, the UE may insert the QoS parameters into the PDU session modification message and send the message to the SMF in order to reuse the detached flow. For example, the IDs of the separate streams are the same, but the QoS characteristics are different.

In operation 501, the UE transmits a registration request message to the AMF.

In operation 503, the AMF transmits a registration response message to the UE.

In operation 505, the UE transmits a PDU session modification request message to the SMF via the AMF.

The following operations relate to a UE request to separate QoS flows. According to an embodiment of the present disclosure, when the UE requests the detachment of the QoS flow in operation 505, the UE may request a QoS flow configuration desired by the UE to the network through the PDU session modification transmission, and the network may allow the requested QoS flow.

That is, when the UE informs the flows of applications executing in the background and traffic or applications that should be transmitted with the best effort by the split bit in order to manage them with a specific flow, the network can efficiently manage the corresponding flow.

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 may insert a QoS parameter to be allocated into a PDU session modification request message to request the SMF to additionally allocate a service data flow to the corresponding separate QoS flow, transmit the message to the SMF, and change and use QoS-related characteristics of the conventional separate QoS flow.

For example, when the detach bit is set to 1 and is detached to be requested, that is, when detachment is requested in a PDU session modification request message that the UE transmits to the SMF, if the requested QoS flow identifier is the same as the QoS flow identifier previously requested by the detached QoS flow, the UE may not insert the QoS parameters to be allocated into the QoS flow identifier described by the requested QoS flow included in the PDU session modification request message and transmit the message to the SMF. At this time, the conventional stream characteristics may be changed, or may be used without any change.

For example, when the detach bit is set to 1 and is detached to be requested in the PDU session modification request message transmitted to the SMF, if the requested QoS flow identifier is the same as the QoS flow identifier previously requested by detaching the QoS flow, the UE may change the QoS flow description associated with the QoS flow identifier and transmit the PDU session modification request message including the changed QoS flow description to the SMF. At this time, the UE uses the same separate stream, but may change and use its characteristics.

In operation 507, the SMF transmits a PDU session modification command to the UE.

Fig. 6 illustrates a structure of a UE according to an embodiment of the present disclosure.

Referring to fig. 6, the UE may include a transceiver 610, a controller 620, and a storage unit 630. In this disclosure, a controller may be defined as a circuit, an application specific integrated circuit, or at least one processor.

The transceiver 610 may transmit/receive signals 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.

The controller 620 may control the overall operation of the UE according to embodiments presented in the present disclosure. For example, the controller 620 may control the signal flow between the blocks to perform operations according to the above-described flowcharts.

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

Fig. 7 illustrates a structure of a network entity according to an embodiment of the present disclosure.

The network entity shown in fig. 7 may be one of the entities shown in fig. 1 to 5 and 8. For example, the network entity may be the AMF or SMF shown in fig. 1 to 5 and 8.

Referring to fig. 7, the network entity may include a transceiver 710, a controller 720, and a storage unit 730. In this disclosure, a controller may be defined as a circuit, an application specific integrated circuit, or at least one processor.

The transceiver 710 may transmit 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 embodiments presented in the present disclosure. For example, the controller 720 may control the signal flow between blocks to perform operations according to the above-described flow diagrams. The storage unit 730 may store at least one piece of information transmitted and received through the transceiver 710 and information generated by the controller 720.

(method 5)

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

In operation 801, the UE transmits a registration request message to the AMF.

In operation 803, the AMF transmits a registration response message to the UE.

In operation 805, the UE transmits a PDU session modification request message to the SMF via the AMF.

The following operations relate to a UE request to separate QoS flows. For example, when the UE requests the detachment of the QoS flow in operation 805, the UE may request the network for a QoS flow configuration desired by the UE through the PDU session modification transmission, and the network may allow the requested QoS flow. When the UE informs the flows of applications executing in the background and traffic or applications that should be transmitted with the best effort by separating bits in order to manage them with a specific flow, the network can efficiently manage the corresponding flow.

According to an embodiment, in order to request additional allocation of a service data flow to a corresponding split QoS flow, the UE sets a split bit included in the PDU session modification request message to 1 and transmits the message to the SMF.

That is, in an embodiment, when the detach bit is set to 1 and is detached to be requested (i.e., when detachment is requested in a PDU session modification request message that the UE transmits to the SMF), the UE may insert characteristics of the QoS flow into an information element (parameter) corresponding to the requested QoS flow description included in the PDU session modification request message and transmit the message to the SMF.

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 the network allocates to the UE and then stores in the UE.

Alternatively, the QoS flow identifier included in the QoS rules information element in the PDU session modification request message may be spare or 0.

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

At this time, the UE may request another service data flow through the detached flow. For example, the UE may set the detach bit to 1 in the QoS rules information element of the PDU session modify message and send a PDU session modify request to the SMF.

In operation 809, the SMF sends a PDU session modify command to the UE.

At this time, when the UE requests traffic separation for a plurality of service data flows to process other QoS in

operations

805 and 807, the SMF binds (maps) the plurality of service data flows with a single QoS flow. Accordingly, the SMF should generate new authorized QoS rules for a single QoS flow and allow traffic separation for the service data flow based on the new authorized QoS rules. The SMF should delete the packet filter separating the service data flows included in the flow from other authorized rules.

Accordingly, the SMF should generate a new QoS flow and include an authorized QoS flow description for the QoS flow. At this time, the following describes the condition based on which the SMF generates a new authorized QoS rule and inserts a new authorized QoS flow description into the authorized QoS flow description IE in the PDU session modification command message.

-generating a newly generated authorized QoS rule for the dedicated QoS flow for the case of traffic split.

That is, when generating a newly generated authorized QoS rule for a dedicated QoS flow for traffic separation, the SMF should generate a new QoS flow and insert an authorized QoS flow description information element into the QoS flow. Thus, when an authorized QoS rule newly generated by the SMF is generated for a dedicated QoS flow for traffic segregation, 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 modify command message, and sends the message to the UE.

This is denoted in english hereinafter

[ TABLE 800 ]

In the above detailed embodiments of the present disclosure, elements included in the present disclosure are expressed in the singular or plural according to the presented detailed embodiments. However, the singular or plural forms are appropriately selected to the presented case for convenience of description, and the present disclosure is not limited by the elements expressed in the singular or plural forms. Thus, elements in the plural may also include a single element, or elements in the singular may also include a plurality of elements.

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 equivalents thereof.

Claims

1. A method of a terminal in a wireless communication system, the method comprising:

sending a Protocol Data Unit (PDU) session modification request message for configuring a separation QoS flow to a Session Management Function (SMF); and

receiving a PDU session modification command message including an authorized QoS rule based on the PDU session modification request message from the SMF.

2. The method of claim 1, wherein the PDU session modify request message includes a QoS rules request information element for binding a service data flow SDF for which the terminal requests separation to a QoS flow by the SMF.

3. The method of claim 2, wherein the QoS rule request information element includes a detach bit for configuring a detach QoS flow and a priority value for assigning a priority associated with a QoS flow.

4. The method of claim 3, wherein the split bit is 1 and the priority value is a value corresponding to a decimal number other than 70 to 99.

5. The method of claim 2, wherein the authorized QoS rules are generated or changed based on binding SDFs to QoS flows.

6. A method of a session management function, SMF, in a wireless communication system, the method comprising:

receiving a Protocol Data Unit (PDU) session modification request message for configuring a separate QoS flow from a terminal; and

transmitting a PDU session modification command message including an authorized QoS rule to the terminal based on the PDU session modification request message.

7. The method of claim 6, wherein the first and second light sources are selected from the group consisting of,

wherein the PDU session modification request message includes a QoS rule request information element,

the method further comprises the following steps:

and binding the service data flow SDF for which the terminal requests separation to the QoS flow based on the QoS rule request information element.

8. The method of claim 7, wherein the QoS rule request information element includes a detach bit for configuring a detach QoS flow and a priority value for assigning a priority associated with a QoS flow.

9. The method of claim 8, wherein the split bit is 1 and the priority value is a value corresponding to a decimal number other than 70 to 99.

10. The method of claim 7, wherein the authorized QoS rules are generated or changed based on binding SDFs to QoS flows.

11. A terminal in a wireless communication system, the terminal comprising:

a transceiver configured to transmit and receive signals to and from a session management function SMF; and

a controller configured to perform control to transmit a protocol data unit, PDU, session modification request message for configuring a split QoS flow to the SMF, and to receive a PDU session modification command message including an authorized QoS rule based on the PDU session modification request message from the SMF.

12. The terminal of claim 11, wherein the PDU session modify request message includes a QoS rules request information element for binding a service data flow SDF for which the terminal requests separation to a QoS flow by the SMF.

13. The terminal of claim 12, wherein the QoS rule request information element includes a detach bit for configuring a detach QoS flow and a priority value for assigning a priority associated with a QoS flow.

14. The terminal of claim 13, wherein the separation bit is 1, and the priority value is a value corresponding to a decimal number other than 70 to 99.

15. The terminal of claim 12, wherein the authorized QoS rules are generated or changed based on binding SDFs to QoS flows.

16. A session management function, SMF, in a wireless communication system, the SMF comprising:

a transceiver configured to transmit and receive signals to and from a terminal; and

a controller configured to perform control to receive a protocol data unit, PDU, session modification request message for configuring the split QoS flows from the terminal, and to transmit, to the terminal, a PDU session modification command message including an authorized QoS rule based on the PDU session modification request message.

17. The SMF according to claim 16, wherein,

wherein the PDU session modification request message includes a QoS rule request information element, and

wherein the controller is configured to perform control to bind the service data flow SDF for which the terminal requests separation to the QoS flow based on the QoS rule request information element.

18. The SMF of claim 17, wherein the QoS rule request information element comprises a detach bit for configuring a detach QoS flow and a priority value for assigning a priority associated with a QoS flow.

19. The SMF of claim 18, wherein the split bit is 1 and the priority value is a value corresponding to a decimal number other than 70 to 99.

20. The SMF of claim 17, wherein the authorized QoS rules are generated or changed based on binding SDFs to QoS flows.