KR102513968B1 - QoS MEDIATION APPARATUS AND METHOD OF QoS CONTROL - Google Patents

Abstract

A quality of service (QoS) adjusting device and a control method thereof are provided. This device includes a mobile router connected to at least one end terminal through a short-range communication interface, a communication interface connected to a Session Management Function (SMF) of a core network to which the mobile router is connected, a memory for storing a program, and and at least one processor executing the program, wherein the program receives a Quality of Service (QoS) of the at least one end terminal from the mobile router and receives the QoS of the mobile router from the session management device. and instructions for down-adjusting or up-adjusting the QoS of the terminating device or the QoS of the mobile router so that the QoS of the at least one terminating device corresponds to the QoS of the mobile router.

Description

QoS control device and QoS control method {QoS MEDIATION APPARATUS AND METHOD OF QoS CONTROL}

The present invention relates to a QoS adjusting device and a QoS control method.

A mobile router is a device that converts a mobile communication signal into a short-distance wireless signal, and is also called an egg. The mobile router is wirelessly connected to end terminals such as mobile, tablet, laptop, IoT (Internet of Thing) devices, drones, CCTVs, and home cams, so that they can connect to the mobile communication network and use the wireless Internet. let it be Generally, mobile routers are used as portable Wi-Fi routers.

A mobile router accesses a core network of a mobile communication operator and connects a data session. At this time, when a data session is connected, a Policy Control Function (PCF) allocates QoS to the mobile router based on subscriber information of the mobile router registered in a Subscriber Profile Repository (SPR). The Session Management Function (SMF) applies the QoS assigned by the PCF to the mobile router's data session.

The QoS of the end terminal is controlled by the mobile router. A QoS control method for an end terminal of a mobile router is defined in two modes, Wi-Fi Multimedia Extensions (WMM) and Wi-Fi Scheduled Multimedia (WSM), in the Institute of Electrical and Electronics Engineers (IEEE) 802.11e standard.

As such, the QoS of the mobile router is controlled by the nodes (SPR, PCF, SMF) of the core network, and the QoS of the end terminal is controlled by the mobile router in a separate method. That is, QoS control for the end terminal of the mobile router and QoS control for the mobile router of the core network are performed separately. Therefore, the core network can control QoS only up to the mobile router, and cannot perform end-to-end QoS control for end terminals connected to the mobile router.

In this case, even if the mobile router provides a high QoS to the end terminal, if the core network provides a low QoS to the mobile router, the end terminal has no choice but to communicate with a low QoS. Conversely, even if the core network provides a high QoS to the mobile router, if the mobile router provides a low QoS to the end terminal, the end terminal has no choice but to communicate with a low QoS. Therefore, there is a problem in that QoS control does not coincide with each other even though the mobile router and the end terminal are connected to each other.

In addition, with the recent spread of BYOD (Bring Your Own Device) service, the number of companies using terminals owned by individuals for business purposes is rapidly increasing. However, when accessing a company's internal computer network with a terminal owned by an individual, a security problem due to information leakage may occur. To prevent this, Private 5G service is being provided.

Private 5G service provides subscribers with a dedicated 5G network that is separated from the general 5G network targeting an unspecified number of people. Private 5G service allows closed access and connection only to users' terminals or objects belonging to specific corporate subscribers, such as factories, airports, ports, hospitals, offices, universities, logistics centers, local governments, government agencies, the National Intelligence Service, power plants, etc. do. Private 5G service is targeted at corporate subscribers, so it can also be called corporate 5G service. The Private 5G service is a B2B-specific service that enables users to conveniently use and secure subscriber data at once.

However, when a mobile router is installed within the company to allow various terminals to access the dedicated core network in order to provide private 5G service, interference occurs between each terminal accessing the dedicated core network through the mobile router in a specific area where the mobile router is installed. As a result, there is a problem of deteriorating QoS quality.

However, with the current QoS control method, only QoS control for mobile routers in the core network is possible. That is, even if the core network wants to participate in the QoS of each terminal, it cannot be done in the current method.

The problem to be solved by the present invention is a QoS Mediation Function (QMF) and a QoS control method for controlling the QoS of an end terminal connected to a mobile router and the QoS of a mobile router to correspond to each other in conjunction with a mobile router and a core network. is to provide

According to an embodiment of the present invention, the QoS adjusting device is connected to a mobile router connected to at least one end terminal through a short-range communication interface and a session management function (SMF) of a core network to which the mobile router is connected, respectively. A communication interface, a memory for storing a program, and at least one processor executing the program, wherein the program receives a Quality of Service (QoS) of the at least one end terminal from the mobile router, and the session Instructions for receiving the QoS of the mobile router from a management device and adjusting down or up the QoS of the end terminal or the QoS of the mobile router so that the QoS of the at least one end terminal corresponds to the QoS of the mobile router ( Instructions) are included.

The QoS adjusting device is configured such that the QoS of the mobile router and the QoS of the at least one end terminal include a downlink bandwidth, and the program determines that the downlink bandwidth of the at least one end terminal is the downlink bandwidth of the mobile router. If it is less than, it may include instructions requesting the mobile router to increase the downlink bandwidth of the at least one end terminal.

The QoS of the mobile router and the QoS of the at least one terminating terminal include an uplink bandwidth, and the program may, if the uplink bandwidth of the mobile router is smaller than the uplink bandwidth of the at least one terminating terminal, the It may include instructions for requesting an upward adjustment of the uplink bandwidth of the mobile router to a policy control function (PCF) of the core network and maintaining the uplink bandwidth of the at least one end terminal.

The program may include instructions for requesting a downlink bandwidth of the at least one end terminal to the mobile router when a rejection response to the uplink request is received from the policy control device.

The communication interface may be connected to the session management device and the policy control device through an Rx interface to transmit and receive data.

The program includes instructions for receiving a QoS assignment message from the session management device through the Rx interface and transmitting a QoS adjustment request message to the policy control device, wherein the QoS assignment message is transmitted by the policy control device to the mobile device. QoS parameters allocated to routers, and the QoS adjustment request message includes uplink-adjusted QoS parameters or down-adjusted QoS parameters requested to the policy control device, wherein the QoS parameters are included in the uplink of the mobile router It may include a maximum supported bandwidth and a minimum supported bandwidth for an Internet Protocol (IP) flow, and a maximum supported bandwidth and a minimum supported bandwidth for a downlink IP flow of the mobile router.

The communication interface may transmit/receive data with the mobile router using a pre-designated dedicated application programming interface (API).

The program receives, from the mobile router, a connection information message notifying access of the terminating terminal and a connection release information message notifying disconnection of the terminating terminal from the mobile router using the dedicated API, and controls QoS of the terminating terminal to the mobile router. Instructions for transmitting a request message, wherein the connection information message and the connection release information message include a QoS parameter allocated by the mobile router to the end terminal, and the QoS adjustment request message includes a request to the mobile router and an up-adjusted QoS parameter or a down-adjusted QoS parameter, wherein the QoS parameters include a maximum supported bandwidth and a minimum supported bandwidth for an uplink IP (Internet Protocol) flow of the end terminal and a downlink of the end terminal A maximum supported bandwidth and a minimum supported bandwidth for an IP flow may be included.

According to another embodiment of the present invention, a quality of service (QoS) adjusting device operated by at least one processor controls QoS indicating an amount of allocable communication resources, wherein a mobile router and a data session are connected. Receiving QoS information of the mobile router from a Session Management Function (SMF) of a core network, when an end terminal is connected to the mobile router, access information including the QoS information of the end terminal from the mobile router Comparing the QoS information of the mobile router and the QoS information of the terminating terminal, and determining an increase in the QoS level of the mobile router when the QoS level of the terminating terminal is higher than that of the mobile router; requesting an increase in the QoS level of the mobile router to a Policy Control Function (PCF) of the core network, and when receiving an up acceptance response of the QoS level from the policy control device, the mobile router and requesting to maintain the QoS level of the terminal.

After the step of requesting the uplink, if a QoS level uplink rejection response is received from the policy control device, the method may further include requesting a downlink of the QoS level of the end terminal to the mobile router.

After the step of requesting to maintain the QoS level of the end terminal, when the connection between the mobile router and the end terminal is released, receiving connection release information of the end terminal from the mobile router; Acquiring QoS information of the remaining end terminals except for the released end terminal, comparing the QoS information of the remaining end terminals with the QoS information of the mobile router to determine whether to downgrade the QoS level of the mobile router, and When the QoS level of the mobile router is determined to be lowered, the method may further include requesting a lowering of the QoS level of the mobile router from the policy control device.

According to another embodiment of the present invention, a QoS (Quality of Service) adjusting device operated by at least one processor controls QoS indicating the amount of allocable communication resources, which is a session management device of a core network. Receiving QoS allocation information of a mobile router from a Session Management Function (SMF), determining whether QoS adjustment of an end terminal connected to the mobile router is necessary based on the QoS allocation information, and determining that the QoS adjustment is necessary. If determined, requesting QoS adjustment of the end terminal to the mobile router.

Prior to the receiving step, while the mobile router establishes a data session with the session management device, the initial QoS information allocated to the mobile router by the Policy Control Function (PCF) of the core network is transmitted to the session management device. The method may further include receiving from a device, wherein the QoS allocation information may include QoS information changed from the initial QoS information by the policy control device according to a request of an application function (AF) of the core network.

The determining step may include comparing the changed QoS level of the mobile router and the QoS level of the terminating terminal, and if the changed QoS level is higher than the QoS level of the terminating terminal, determining an upgrade of the QoS level of the terminating terminal. and, if the changed QoS level is lower than the QoS level of the terminating terminal, determining a downgrade of the QoS level of the terminating terminal.

In the requesting step, a QoS adjustment request message including uplink bandwidth information and downlink bandwidth information adjusted upward or downlink bandwidth information and downlink bandwidth information adjusted downward may be transmitted to the mobile router.

According to the embodiment, when the core network provides a high QoS to the mobile router, the mobile router provides a high QoS to the end terminal to respond to the mobile router, and when the core network provides a low QoS to the mobile router, the mobile router responds to the end terminal. can provide low QoS.

In addition, if the mobile router provides high QoS to the end terminal, the core network provides a high QoS to the mobile router to respond to it, and if the mobile router provides low QoS to the end terminal, the core network provides low QoS to the mobile router to respond. can provide.

In this way, the QoS control for the mobile router of the core network and the QoS control for the end terminal of the mobile router can be matched with each other through the QoS adjusting device interworking with the core network and the mobile router. As a result, the E2E of the end terminal in the core network QoS control becomes possible.

1 is a configuration diagram of a network for controlling QoS according to an embodiment of the present invention.
2 is a flowchart illustrating a process in which a mobile router establishes a data session with a core network according to an embodiment of the present invention.
3 is a flowchart illustrating a QoS control process when an end terminal is connected to a mobile router according to an embodiment of the present invention.
4 is a flowchart illustrating a QoS control process when an end terminal is disconnected from a mobile router according to an embodiment of the present invention.
5 is a flowchart illustrating a QoS control process when the QoS of a mobile router is changed in a core network according to an embodiment of the present invention.
6 is a flowchart illustrating a process of controlling QoS by a QoS adjusting apparatus according to an embodiment of the present invention.
7 is a flowchart illustrating a process of controlling QoS by a QoS adjusting device according to another embodiment of the present invention.
8 is a hardware configuration diagram of a server device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

In addition, terms such as “…unit”, “…unit”, and “…module” described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. can

Devices described in the present invention are composed of hardware including at least one processor, memory device, communication device, and the like, and a program to be executed in combination with the hardware is stored in a designated place. The hardware has the configuration and capability to implement the method of the present invention. The program includes instructions implementing the operating method of the present invention described with reference to the drawings, and implements the present invention in combination with hardware such as a processor and a memory device.

In this specification, “transmission or provision” may include direct transmission or provision as well as indirect transmission or provision through another device or by using a detour path.

Expressions written in the singular in this specification may be interpreted in the singular or plural unless an explicit expression such as “one” or “single” is used.

In this specification, like reference numerals refer to like elements, regardless of drawing, and "and/or" includes each and every combination of one or more of the recited elements.

In this specification, terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present disclosure.

In this specification, a terminal is a comprehensive concept meaning a user terminal in communication, and includes a user equipment (UE), a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), and an AT ( Access Terminal), mobile station, mobile terminal, subscriber station, portable subscriber station, user device, access terminal, wireless device, etc., and may be called UE, MS, MT, SS, PSS, AT, mobile station, mobile terminal, subscription It may include all or some functions of a local station, mobile subscriber station, user equipment, access terminal, wireless device, and the like.

The terminal includes a base station (BS), an access point (AP), a radio access station (RAS), a Node B, an evolved NodeB (eNodeB), a transmitting and receiving base station ( It can be connected to a remote server by accessing a network device such as Base Transceiver Station (BTS), MMR (Mobile Multihop Relay)-BS, etc.

Terminals include various types of communication terminals such as mobile terminals such as smart phones, tablet terminals such as smart pads and tablet PCs, computers, and televisions.

A base station (BS) includes an access point (AP), a radio access station (RAS), a node B, a base transceiver station (BTS), and a mobile multihop relay (MMR). )-BS, etc., and may include all or some functions of an access point, a wireless access station, a NodeB, a transmission/reception base station, and an MMR-BS.

Embodiments of the present invention are at least one of 3GPP 5G systems such as 3rd Generation Partnership Project (3GPP) LTE, LTE-A, 3GPP2, Institute of Electrical and Electronics Engineers (IEEE) system, and Study on Architecture for Next Generation System (FS_NextGen) can be supported by relevant standard documents. That is, among the embodiments of the present invention, steps or parts not described to clearly reveal the technical spirit of the present invention may be supported by the above document. In addition, all terms disclosed in this document can be explained by the standard document.

In the present invention, the core network is described as an example of a 5G core network, but it can also be applied to LTE Evolved Packet Core (EPC), and the 5G core network includes a 5G Non Standalone (NSA) core network and a 5G Stand Alone (SA) core network. can include

The 5G NSA/SA core network includes Access and Mobility Function (AMF), Session Management Function (SMF), User Plane Function (UPF), User Data Management (UDM), Unified Data Repository (UDR), Policy Control Function (PCF), It includes Subscriber Profile Repository (SPR), Application function (AF), and the like.

AMF is a mobility management device, and manages access and mobility of a terminal through NAS (Non Access Stratum) signaling.

The SMF creates and manages a session that connects a terminal to a Packet Data Network (PDN).

The UPF delivers downlink protocol data unit (PDU) data to a terminal connected to the PDN and a session, and delivers uplink PDU data to the PDN.

UDM and UDR are subscriber devices, and store and manage subscriber information of the terminal, register the location of the terminal, and perform subscriber authentication.

The PCF determines policies such as session management and mobility management and delivers them to AMF and SMF so that proper mobility management, session management, QoS management, etc. can be performed.

The SPR is a database that stores policies for each terminal, that is, policies and charging rules (Access Profile), and provides the policies to the PCF at the request of the PCF.

AF provides information about packet flow to PCF to guarantee QoS.

Now, a Quality of Service (QoS) adjustment device (QoS Mediation Function, hereinafter referred to as 'QMF') and a QoS control method according to an embodiment of the present invention will be described with reference to the drawings.

1 is a configuration diagram of a network for controlling QoS according to an embodiment of the present invention.

Referring to FIG. 1 , a mobile router 100 accesses a core network 300 through a base station (gNB) 200 . The core network 300 connects the mobile router 100 to a Packet Data Network (PDN) 400.

The core network 300 includes AMF 301, UDM/UDR 303, SMF 305, PCF 307, SPR 309, UPF 311, and AF 313. These configurations (301, 303, 305, 307, 309, 311, 313) are known 5G core equipment, and detailed descriptions are omitted.

The mobile router 100 is a device that converts a mobile communication signal into a short-distance wireless signal, and is also called an egg. The mobile router is wirelessly connected to the end terminals 500 so that they can be connected to the core network 300 and use mobile communication services.

At this time, the mobile router 100 may operate as a portable Wi-Fi router connected to a plurality of end terminals 500 through a Wi-Fi interface.

The mobile router 100 may be installed in a home, but may be installed in a specific zone to provide a dedicated network service to end terminals 500 . Here, the dedicated network service may be a 5G service dedicated to enterprises.

The mobile router 100 is installed in a corporate subscriber's building, office, site, etc., and can connect end terminals 500 to the core network 300. In this case, the core network 300 may be implemented as a dedicated core network distinct from a general network, and the PDN 400 may be a dedicated network. In this case, the core network 300 may be referred to as a 5G core network dedicated to enterprises.

A private network is distinguished from a public network that can be accessed by an unspecified number of people, and is a network in which external access is restricted for specific subscribers. A private network may also be referred to as a private network, a private network, or an intranet.

At this time, the subscriber terminal may use the aforementioned mobile router.

The mobile router 100 accesses the base station 200 through wireless communication using a wireless communication frequency and uses a separate connection interface from the end terminal 500 . For example, the mobile router 100 may be connected to the end terminal 500 through a WiFi interface. When the core network 300 is implemented as a dedicated core network, a separate general core network for accessing the public network may exist. At this time, the public network and the dedicated network mean separated traffic paths, and do not necessarily need to be physically separated. For example, public and private networks can be different bearers created on the same physical path.

When the core network 300 is implemented as a dedicated core network, the SMF 305, PCF 307, SPR 309, and UPF 311 may be dedicated core nodes that process only services of subscribers of the dedicated network service.

As another embodiment of the present invention, the core network 300 can be divided into a general core network and a corporate core network. In this case, the mobile router 100 may include a corporate private network switching function. When the enterprise-specific 5G ON triggering is performed while the mobile router 100 is basically connected to the general core network, the network switch request to the enterprise-specific core network is transmitted to the currently connected general core network, thereby enabling connection with the general core network. After release, it is connected to the corporate core network. In addition, when the mobile router 100 performs general core network ON triggering while connected to the enterprise dedicated core network, a network switch request to the general core network is transmitted to the currently connected enterprise dedicated core network and After the connection is disconnected, it is connected to the general core network. At this time, QoS control according to an embodiment of the present invention can be performed in both the general core network and the dedicated core network.

At least one terminal terminal 500 connected to the mobile router 100 is a terminal at a user contact point, but may be a device without a communication module or a universal subscriber identity module (USIM).

The end terminal 500 accesses the mobile router 100 through wireless LAN communication such as Wi-Fi.

The end terminal 500 is a terminal equipped with a wireless LAN communication function, and includes a notebook, a pad, a smartphone, a PDA (Personal Digital Assistants), an MP3 player, a tablet PC (Personal Computer) , PMP (Portable Multimedia Player), laptop computer, personal computer, IoT (Internet of Things) terminal, sensor, drone, CCTV (Closed Circuit Television), Home CAM and the like, but is not limited thereto and may include various types of wireless communication devices accessible to the mobile router 100 through wireless LAN communication.

In addition, the terminal terminal 100 includes a subscriber module (USIM) but may include other communication terminals (eg, smart phones) that cannot receive network authentication due to a wrong carrier.

The terminal terminal 500 is connected to the mobile router 100, accesses the base station 200 via the mobile router 100, and receives data service through the core network 300 accessed through the base station 200. .

The base station 200 may communicate with the mobile router 100 using 5G access technology.

The PCF 307 determines the QoS to be applied to the mobile router 100, and the SMF 305 applies the QoS determined by the PCF 307 to the data session of the mobile router 100.

When the mobile router 100 is connected to the end terminal 500 through a WiFi interface, the mobile router 100 controls the QoS of the end terminal 500 in a manner defined in the Institute of Electrical and Electronics Engineers (IEEE) 802.11e standard. can do. Two modes are defined in the IEEE 801.11e standard, that is, a Wi-Fi Multimedia Extensions (WMM) method and a Wi-Fi Scheduled Multimedia (WSM) method.

WMM defines 8 priorities for each access category (Voice, Video, Best Effort, Background). The mobile router 100 uses AC for uplink traffic sent from the end terminal 500 to the mobile router 100 and downlink traffic sent from the PDN 400 to the mobile router 100. Traffic with a higher priority is treated first, and traffic with a lower priority is processed later. In this way, the WMM scheme is capable of prioritized QoS control.

In the WSM method, the mobile router 100 gives each end terminal 500 a radio frequency use opportunity and usage time, and the end terminal 500 transmits uplink traffic to the mobile router 100 and PDN 400. QoS for downlink traffic sent to the mobile router 100 can be controlled. In this way, the WSM scheme is capable of parameterized QoS control.

As such, although the end terminal 500 and the mobile router 100 are connected to each other, QoS control is performed separately. Therefore, the core network 300 cannot directly control the QoS of the end terminal 500. That is, end-to-end QoS control for the end terminal 500 of the core network 300 is impossible.

Even if the mobile router 100 provides a high QoS to the end terminal 500, if the core network 300 provides a low QoS to the mobile router 100, the end terminal 500 cannot but communicate with the low QoS. In addition, even if the core network 300 provides a high QoS to the mobile router 100, if the mobile router 100 provides a low QoS to the end terminal 500, the end terminal 500 can communicate with a low QoS. there is only

In order to solve this problem, an embodiment of the present invention proposes a new node called QMF (600).

The QMF 600 is a QoS control device that performs QoS situation management and arbitration, and interworks with the mobile router 100 using a pre-designated dedicated API (Application Programming Interface).

The QMF 600 receives QoS information of at least one end terminal 500 connected to the mobile router 100 from the mobile router 100 .

The QMF 600 interoperates with the SMF 305 and the PCF 307 using the Rx interface. The QMF 600 receives QoS information assigned to the mobile router 100 by the PCF 307 from the SMF 305 and the PCF 307 .

The QMF 600 down-adjusts or up-regulates the QoS of the end device 500 or the QoS of the mobile router 100 so that the QoS of at least one end device 500 corresponds to the QoS of the mobile router 100.

The QMF 600 performs a QoS information management function for the mobile router 100 and the end terminal 500 .

The QMF 600 may manage terminal information of the mobile router 100 using at least one of MDN, IMSI, IPv4, and IPv6.

The QMF 600 converts the QoS control information of the mobile router 100 into 5QI, QCI, ARP Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, Min-Desired-Bandwidth- It can be managed using at least one of the DLs. In this case, at least one of 5QI, QCI, ARP Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL may be a value representing a QoS level. .

The QMF 600 may map and manage terminal information of the mobile router 100 and QoS control information.

The QMF 600 may manage terminal information of the end terminal 500 using at least one of MDN, IMSI, IPv4, IPv6, MAC-Address, SSID, and Port.

The QMF 600 transmits QoS control information of the end terminal 500 to at least one of Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL. can be used to manage.

The QMF 600 may map and manage terminal information of the end terminal 500 and QoS control information.

2 is a flowchart illustrating a process of establishing a data session with a core network by a mobile router according to an embodiment of the present invention.

Referring to FIG. 2 , when a PDN access event occurs, such as when the power of the mobile router 100 is turned on, the mobile router 100 transmits an Attach Request to the base station (gNB) 200 (S101). ).

The base station (gNB) 200 transfers the attach request received from the mobile router 100 to the AMF 301 (S103).

The AMF 301 interworks with the UDM/UDR 303 to search subscriber information and perform network authentication (S105). Step S105 corresponds to a procedure for network authentication through exchange of authentication vectors and the like and for determining whether the mobile router 100 is a subscriber capable of accessing the network.

The AMF 301 transmits a Create Session Request to the SMF 305 using subscriber information obtained from the UDM/UDR 303 (S107). As an example, the AMF 301 may transmit a Create Session Request to the SMF 305 using the IP address of the SMF 305 that matches the APN-OI Replacement of the mobile router 100.

At this time, if the APN-OI Replacement represents dedicated network access, the SMF 305 may be a dedicated core node.

The SMF 305 interworks with the SPR 309 to perform RADIUS (Remote Authentication Dial In User Service) access authentication. The SMF 305 transmits a RADIUS Access Request to the SPR 309 (S109).

The SPR 309 performs authentication to determine whether the mobile router 100 can access the PDN (S111). At this time, when the PDN 400 is a dedicated network, the SPR 309 can determine whether the mobile router 100 can access the dedicated network.

The SPR 309 transmits a RADIUS access response including the authentication result in step S111 to the SMF 305 (S113).

The SMF 305 transmits a Credit Control Request-Initial (CCR-I) message to the PCF 307 (S115). CCR-I messages contain QoS requests.

The PCF 307 transmits a Sending Limit Notification Request (SNR) message to the SPR 309 (S117). The SNR message includes a request for subscriber information of the mobile router 100 .

The SPR 309 transmits a Sending Limit Notification Answer (SNA) message including the requested subscriber information to the PCF 307 (S119).

The PCF 307 allocates QoS based on the subscriber information received in step S119 and transmits a CCA-I (Credit Control Answer - Initial) message including the allocated QoS information to the SMF 305 (S121).

The SMF 305 applies the QoS received in step S121 to the data session of the mobile router 100 (S123).

The SMF 305 transmits a Session Establishment Request message to the UPF 311 (S125). In this case, when the PDN 400 is a dedicated network, the UPF 311 may be a dedicated core node.

The SMF 305 receives a Session Establishment Response message from the UPF 311 (S127).

Subsequently, the SMF 305 transmits a Create Session Response message to the AMF 301 (S129).

The AMF 301 transmits an Attach Accept message to the base station (gNB) 200 (S131). The base station (gNB) 200 transmits an Attach Accept message to the mobile router 100 (S133). Through this process, the mobile router 100 establishes a PDU session with the UPF 311 via the base station (gNB) 200.

At this time, after step S127, the SMF 305 provides the QMF 600 with QoS information allocated to the mobile router 100, which will be described with reference to FIG. 3.

3 is a flowchart illustrating a QoS control process when an end terminal is connected to a mobile router according to an embodiment of the present invention.

Referring to FIG. 3, the dedicated SMF 305 transmits a QoS Allocation Information message including QoS information of the mobile router 100 to the QMF 600 (S201). At this time, step S201 may be added after step S127 of FIG. 2 .

A QoS Allocation Information message may be configured as shown in Table 1.

Attribute Presence Length Description MDN M 11 MDN (Mobile Directory Number) of the mobile router
Example: 01022007700 IMSI M 15 IMSI (International Mobile Subscriber Identity) of the mobile router
Example: 450081022007700 Framed-IP-Address O 12 Mobile router's IPv4 address Example: 192.168.2.251 (omit the dot '.') Framed-IP-Network O 12 Mobile router's IPv4 subnet mask
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 Mobile router's IPv6 address. Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF QCI O 32 Mobile router's QCI (Qos Class Identifier) information 5QI O 32 5QI (5G QoS Indicator) information of the mobile router ARP O 32 Mobile router Address Resolution Protocol (ARP) information Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth for transmitting upstream IP flow traffic of mobile routers (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth for transporting downlink IP flow traffic of a mobile router (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for transmitting upstream IP flow traffic of a mobile router (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth for transporting downlink IP flow traffic of mobile routers (unit: bits/s)

In Table 1, Attribute is the parameter name. Presence indicates whether a parameter is required in the message format. If the parameter is required, it is indicated by M (Mandatory), and if it is optional, it is indicated by O (Optional). Lenth is the length of the parameter value, which is the number of digits. These contents are equally applied to all tables to be described later.

In addition, descriptions of the same items among items related to tables to be described later will be omitted.

According to Table 1, the QoS Allocation Information message is the terminal information (MDN, IMSI, Framed-IP-Address, Framed-IP-Network, Framed-IP-Network, Framed- IPv6-Prefix, etc.) and QoS control information (QCI, 5QI, ARP, maximum rate, minimum rate, etc.) of the mobile router 100. Here, the maximum speed may be expressed by the maximum supported uplink bandwidth (Max-Supported-Bandwidth-UL) and the maximum supported downlink bandwidth (Min-Desired-Bandwidth-UL) of the mobile router 100 . The minimum speed may be expressed by the minimum supported uplink bandwidth (Min-Desired-Bandwidth-DL) and the minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL) of the mobile router 100 .

In this case, the QoS allocation information of Table 1 may be referred to as initial QoS information.

Meanwhile, when the mobile router 100 is connected to the end terminal 500 (S203), it transmits a UE Attach Information message to the QMF 600 (S205). The UE Attach Information message includes QoS information of the end terminal 500 .

A UE Attach Information message may be configured as shown in Table 2.

Attribute Presence Length Description UE-Status M One Attach, Detach status information (1: Attach, 0: Detach)
Example: 1 MDN M 11 End-point MDN
Example: 01022007700 IMSI M 15 End-end IMSI
Example: 450081022007700 Framed-IP-Address O 12 End-point IPv4 address
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 End-end IPv4 Subnet Mask
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 End-point IPv6 address
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF MAC-Address O 12 End-end MAC address
Example: A1:B2:C3:D4:E5:F6 (omitting the colon ':') SSID O 32 Wireless network name of the end device
Example: KT_1100_media Port O 5 End terminal port address
Example: 22 Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth for transmitting end-end upstream IP flow traffic (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth for end-to-end downlink IP flow traffic transmission (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for transmitting end-end upstream IP flow traffic (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth for end-to-end downlink IP flow traffic transmission (unit: bits/s)

According to Table 2, the UE Attach Information message includes the connection state information (UE-Status) of the end device 500, the terminal information (MDN, IMSI, Framed-IP-Address, Framed -IP-Network, Framed-IPv6-Prefix, MAC-Address, SSID, Port, etc.) and QoS control information (maximum rate, minimum rate) set for the end device 500 are included. Here, the maximum speed may be expressed by the maximum supported uplink bandwidth (Max-Supported-Bandwidth-UL) and the maximum supported downlink bandwidth (Min-Desired-Bandwidth-UL) of the end terminal 500. The minimum speed may be expressed as the lowest supported bandwidth for uplink (Min-Desired-Bandwidth-DL) and the lowest supported bandwidth for downlink (Min-Desired-Bandwidth-DL) of the end terminal 500.

The QMF 600 compares the QoS information of the mobile router 100 received in step S201 with the QoS information of the end terminal 500 received in step S205 (S207). In this case, the QMF 600 may sum up QoS information of the connected end terminal 500 and at least one already connected end terminal 500 in step S203 and compare the QoS information of the mobile router 100 with the QoS information of the mobile router 100 .

The QMF 600 determines whether QoS enhancement of the mobile router 100 is required (S209).

If it is determined that QoS enhancement is not necessary in step S209, the QMF 600 determines to maintain the QoS of the end terminal 500 (S211).

The QMF 600 transmits a QoS Mediation Request message requesting maintenance of the QoS information received in step S205 to the mobile router 100 (S213).

A QoS Mediation Request message may be implemented as shown in Table 3 below.

Attribute Presence Length Description MDN M 11 MDN of end terminal
Example: 01022007700 IMSI M 15 IMSI of end device
Example: 450081022007700 Framed-IP-Address O 12 IPv4 address of the end device
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 IPv4 subnet mask of end device
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 IPv6 primary of end terminal
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF MAC-Address O 12 MAC address of the end terminal
Example: A1:B2:C3:D4:E5:F6 (omitting the colon ':') SSID O 32 Wireless network name of the end device
Example: KT_1100_media Port O 5 Port address of end device
Example: 22 WMM-Priority O One WMM Priority of End Device
Example: 1 Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth for transmission of upstream IP flow traffic of end devices (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth for transmission of downlink IP flow traffic of an end device (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for transmission of uplink IP flow traffic of the end device (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth for transmission of downlink IP flow traffic of an end device (unit: bits/s)

At this time, WMM-Priority, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL contain QoS information applied to the end terminal 500. However, since it is determined to maintain QoS, it may be the same as the information received in step S205.

The mobile router 100 transmits a QoS Mediation Accept message to the QMF 600 (S215).

A QoS Mediation Accept message may be implemented as shown in Table 4 below.

Attribute Presence Length Description MDN M 11 MDN of end terminal
Example: 01022007700 IMSI M 15 IMSI of end device
Example: 450081022007700 Framed-IP-Address O 12 IPv4 address of the end device
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 IPv4 subnet mask of end device
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 IPv6 address of the end device
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF MAC-Address O 12 MAC address of the end terminal
Example: A1:B2:C3:D4:E5:F6 (omitting the colon ':') SSID O 32 Wireless network name of the end device
Example: KT_1100_media Port O 5 Port address of end device
Example: 22 WMM-Priority O One WMM Priority of End Device
Example: 1 Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth application information for transmission of uplink IP flow traffic of the end device (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth application information for transmission of downlink IP flow traffic of an end device (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth application information for transmission of uplink IP flow traffic of the end device (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth application information for transmission of downlink IP flow traffic of an end device (unit: bits/s)

Items in Table 4 are the same as in Table 3. At this time, WMM-Priority, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL contain QoS information applied to the end terminal 500. .

At this time, the mobile router 100 may transmit a QoS-Mediation-Reject message to the QMF 600 in step S215.

A QoS-Mediation-Reject message may be implemented as shown in Table 5.

Attribute Presence Length Description MDN M 11 MDN of end terminal
Example: 01022007700 IMSI M 15 IMSI of end device
Example: 450081022007700 Framed-IP-Address O 12 IPv4 address of the end device
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 IPv4 subnet mask of end device
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 IPv6 address of the end device
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF Reject M 11 Reject reason
Example: Reasons for not increasing the QoS of an end device

According to Table 5, the QoS-Mediation-Reject message includes the QoS mediation rejection reason of the end terminal 500.

The mobile router 100 performs QoS allocation and control of at least one end terminal 500 using a predefined QoS control method (S217).

Meanwhile, if it is determined in step S209 that QoS enhancement of the mobile router 100 is necessary, the QMF 600 transmits a QoS Mediation Request message to the PCF 307 (S219).

A QoS Mediation Request message may be implemented as shown in Table 6 below.

Attribute Presence Length Description MDN M 11 MDN on mobile routers
Example: 01022007700 IMSI M 15 IMSI of mobile router
Example: 450081022007700 Framed-IP-Address O 12 Mobile router's IPv4 address
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 Mobile router's IPv4 subnet mask
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 Mobile router's IPv6 address
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF 5QI O 32 5QI information of mobile router ARP O 32 ARP information from mobile router Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth for transmitting upstream IP flow traffic of mobile routers (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth for transporting downlink IP flow traffic of mobile routers (Unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for transmitting upstream IP flow traffic of a mobile router (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth for transporting downlink IP flow traffic of mobile routers (unit: bits/s)

The QoS Mediation Request message includes terminal information (MDN, IMSI, Framed-IP-Address, Framed-IP-Network, Framed-IPv6-Prefix) of the mobile router 100 and QoS information of the mobile router 100. (5QI, ARP, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, Min-Desired-Bandwidth-DL). At this time, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL contain values requesting upward adjustment.

The PCF 307 determines whether the QoS enhancement of the mobile router 100 requested in step S219 is possible (S221). For example, it is possible to determine whether QoS can be increased based on subscriber information of the mobile router 100 by querying the SPR 309 .

When the PCF 307 determines that QoS enhancement is possible, it transmits a QoS Mediation Accept message to the QMF 600 (S223).

A QoS Mediation Accept message may be implemented as shown in Table 7 below.

Attribute Presence Length Description MDN M 11 MDN on mobile routers
Example: 01022007700 IMSI M 15 IMSI of mobile router
Example: 450081022007700 Framed-IP-Address O 12 Mobile router's IPv4 address
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 Mobile router's IPv4 subnet mask
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 Mobile router's IPv6 address
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF 5QI O 32 5QI information of mobile router ARP O 32 ARP information from mobile router Max-Supported-Bandwidth-UL O 32 Maximum support bandwidth application information for upstream IP flow traffic transmission of mobile router (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth application information for transmission of downlink IP flow traffic of mobile routers (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth application information for upstream IP flow traffic transmission of mobile router (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth application information for transmission of downlink IP flow traffic of mobile routers (unit: bits/s)

Table 7 is the same as Table 6, and the QoS information contains values adjusted upward. When the QMF 600 receives the QoS Mediation Accept message, it determines whether to maintain the QoS of the end terminal 500 (S225).

The QMF 600 transmits a QoS Mediation Request message requesting maintenance of the QoS information received in step S205 to the mobile router 100 (S227). At this time, the QoS Mediation Request message is the same as in Table 3.

The QMF 600 receives a QoS Mediation Accept message from the mobile router 100 (S229). At this time, the QoS Mediation Accept message is the same as Table 4.

Then, the mobile router 100 performs QoS allocation and control of at least one end device 500 by using a predefined QoS control method based on the QoS control information received in step S227 (S231). That is, an increased QoS is allocated.

At this time, a QoS rejection response message may be received in step S227, which is implemented as shown in Table 5.

In addition, after step S223, the PCF 307 of the core network 300 transmits a Re-authentication Request (hereinafter collectively referred to as 'RAR') message requesting an increase in QoS to the SMF 305. (S233).

The SMF 305 transmits a re-authentication answer (hereinafter collectively referred to as 'RAA') message to the PCF 307 for a QoS uplink response (S235). And the SMF 305 applies the upgraded QoS information included in the RAR message to the data session connected to the mobile router 100 (S237).

The SMF 305 transmits a Session Establishment Request message requesting the UPF 311 to modify the session to apply the changed QoS (S239) and receives a Session Establishment Response message (S241) to Reset data session.

In addition, when the PCF 307 of the core network 300 determines that QoS enhancement is not possible in step S221, the PCF 307 transmits a QoS Mediation Reject message to the QMF 600 (S243). .

A QoS-Mediation-Reject message may be implemented as shown in Table 8 below.

Attribute Presence Length Description MDN M 11 MDN on mobile routers
Example: 01022007700 IMSI M 15 IMSI of mobile router
Example: 450081022007700 Framed-IP-Address O 12 Mobile router's IPv4 address
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 Mobile router's IPv4 subnet mask
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 Mobile router's IPv6 address
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF Reject M 11 Reject Reason Example: Unable to increase QoS due to exhaustion of personal limit of mobile router

According to Table 8, the QoS Mediation Reject message includes the terminal information (MDN, IMSI, Framed-IP-Address, Framed-IP-Network, Framed-IPv6-Prefix) of the mobile router 100 and the reason for rejection. (Reject) is included.

When receiving a QoS Mediation Reject message, the QMF 600 determines QoS downlink of the end terminal 500 (S245). The QMF 600 transmits a QoS Mediation Request message including down-adjusted QoS information to the mobile router 100 (S247).

The QoS Mediation Request message is the same as in Table 3, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL are lowered. values are included.

The mobile router 100 transmits a QoS Mediation Accept message to the QMF 600 (S249).

The QoS Mediation Accept message is the same as in Table 4, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL are in step S247. The values received from are included.

Then, the mobile router 100 performs QoS allocation and control of at least one end device 500 using a predefined QoS control method based on the down-adjusted QoS information received in step S247 (S251). .

4 is a flowchart illustrating a QoS control process when an end terminal is disconnected from a mobile router according to an embodiment of the present invention.

Referring to FIG. 4 , when the connection between the mobile router 100 and the end terminal 500 is released (S301), the mobile router 100 transmits terminal information and QoS control information of the disconnected end terminal 500 to the terminal. It is transmitted to the QMF 600 through a UE-Detach-Information message (S303).

The UE Detach Information message format may be implemented as shown in Table 9 below.

Attribute Presence Length Description UE-Status M One Attach, Detach status information (1: Attach, 0: Detach)
Example: 0 MDN M 11 End-point MDN
Example: 01022007700 IMSI M 15 End-end IMSI
Example: 450081022007700 Framed-IP-Address O 12 End-point IPv4 address
Example: 192.168.2.251 (omitting the dot '.') Framed-IP-Network O 12 End-end IPv4 Subnet Mask
Example: 255.255.255.0 (omitting the dot '.') Framed-IPv6-Prefix O 32 End-point IPv6 address
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF MAC-Address O 12 End-end MAC address
Example: A1:B2:C3:D4:E5:F6 (omitting the colon ':') SSID O 32 Wireless network name of the end device
Example: KT_1100_media Port O 5 Port address of end device
Example: 22 Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth for transmission of upstream IP flow traffic of end devices (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth for transmission of downlink IP flow traffic of an end device (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for transmission of uplink IP flow traffic of the end device (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth for transmission of downlink IP flow traffic of an end device (unit: bits/s)

According to Table 9, terminal connection release information is the same as Table 2. At this time, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL contain values assigned to the end terminal 500 from which connection is released. .

The QMF 600 compares the QoS information of the mobile router 100 and the QoS information of the end terminal 500 (S305).

The QMF 600 determines whether QoS downgrading of the mobile router 100 is necessary (S307). This is a process of determining whether minimization of idle resources is necessary through QoS downlink because the uplink and downlink resources provided to the end terminal 500 become idle resources due to disconnection of the end terminal 500 .

The QMF 600 ends the step if the QoS downgrading of the mobile router 100 is not required.

If it is determined that QoS downgrading of the mobile router 100 is necessary, the QMF 600 transmits a QoS Mediation Request message to the PCF 307 (S309).

At this time, the QoS Mediation Request message is the same as in Table 6, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL are Downgraded values are included.

The PCF 307 transmits a QoS downlink request message (RAR) of the mobile router 100 to the SMF 403 (S311) and receives a response message (RAA) (S313).

The PCF 405 transfers the QoS Mediation Accept message to the QMF 600 (S315).

At this time, the QoS Mediation Accept message is the same as in Table 7, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL are Downgraded values are included.

The SMF 305 applies the QoS requested downlink in step S311 to the data session of the mobile router 100 (S317).

The SMF 305 transmits a Session Establishment Request message to the UPF 311 requesting session modification to apply the downlink-requested QoS to the session (S319). Then, a Session Establishment Response message is received from the UPF 311 (S321).

5 is a flowchart illustrating a QoS control process when the QoS of a mobile router is changed in a core network according to an embodiment of the present invention. This process may be added after the steps of FIG. 3 or 4 or may be performed in parallel.

Referring to FIG. 5 , the AF 313 determines to change the QoS of the mobile router 100 (S401). In this case, the AF 313 may be a function included in the QMF 600. Step S401 may occur in various cases, for example, when a corporate subscriber's QoS uplink request or downlink request is input.

Also, S401 may occur after allocating initial QoS information during the session establishment process of the mobile router 100 .

The AF 313 transmits an AAR message requesting a QoS change to the PCF 307 (S403).

The PCF 307 transmits a RAR message requesting QoS change to the SMF 305 (S405).

The SMF 305 transmits an RAA message in response to the QoS change to the PCF 307 (S407).

The PCF 307 transmits an AAA message in response to the QoS change to the AF 313 (S409).

The SMF 305 transmits a QoS Allocation Information message including the QoS change information requested for change in step S405 to the QMF 600 (S411).

The QoS Allocation Information message is the same as in Table 1, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL have changed values. this is included

Based on the QoS allocation information received in step S411, the QMF 600 determines whether QoS up-adjustment or down-adjustment of the end terminal 500 is required (S419).

In step S419, information obtained by summing the changed QoS information of the mobile router 100 and the QoS information allocated to at least one terminating terminal 500 in a connected state may be compared.

At this time, if QoS adjustment is not required, the step ends.

On the other hand, if QoS adjustment is required, the QMF 600 transmits a QoS Mediation Request message requesting QoS up or down of the end terminal 500 to the mobile router 100 (S421).

The mobile router 100 transmits a QoS Mediation Accept message to the QMF 600 (S423).

The QoS Mediation Accept message is the same as in Table 4, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL are in step S421. A value requested from and applied to the end terminal 500 is included.

Based on the changed QoS information received in step S421, the mobile router 100 performs QoS allocation and control of at least one end device 500 using a predefined QoS control scheme (S425).

6 is a flowchart illustrating a process of controlling QoS by a QoS adjusting device according to an embodiment of the present invention. The process of FIG. 6 is used when the QMF 600 performs up-regulation or down-regulation of the mobile router 100 or up-regulation or down-regulation of the end terminal 500 in FIGS. 3 to 5 .

Referring to FIG. 6, the QMF 600 compares the uplink bandwidth (UL_BW_1) of the mobile router 100 and the uplink bandwidth (UL_BW_2) of at least one end terminal 500 (S501) to determine whether UL_BW_1 is greater than UL_BW_2. It is judged (S503).

Here, the uplink bandwidths (UL_BW_1 and UL_BW_2) include the maximum supported uplink bandwidth (Max-Supported-Bandwidth-UL) and the minimum supported uplink bandwidth (Min-Desired-Bandwidth-UL).

The QMF 600 determines the value of the maximum uplink supported bandwidth (Max-Supported-Bandwidth-UL) of the mobile router 100 and the maximum supported uplink bandwidth (Max-Supported-Bandwidth-UL) of at least one end terminal 500 connected thereto. It may be determined whether it is greater than the sum of the values of -UL) (S503).

At this time, at least one end terminal 500 includes an already connected end terminal 500 and a newly connected end terminal 500 .

In step S503, the value of the maximum uplink supported bandwidth (Max-Supported-Bandwidth-UL) of the mobile router 100 is the value of the maximum supported uplink bandwidth (Max-Supported-Bandwidth-UL) of the at least one end terminal 500. If it is greater than the sum of the values, the value of the maximum supported uplink bandwidth (Max-Supported-Bandwidth-UL) allocated to the current end terminal 500 is maintained (S509).

On the other hand, in step S503, the value of the maximum supported uplink bandwidth (Max-Supported-Bandwidth-UL) of the mobile router 100 is the maximum supported bandwidth (Max-Supported-Bandwidth-UL) of the at least one end terminal 500. ), the QMF 600 requests the PCF 307 to increase the value of Max-Supported-Bandwidth-UL of the mobile router 100 (S505). When requesting an uplink, as described above, a QoS Mediation Request message is transmitted.

The QMF 600 determines whether an upstream acceptance response, that is, a QoS Mediation Accept message is received from the PCF 307 (S507).

When the upstream acceptance response is received, step S509 is performed.

On the other hand, if the uplink acceptance response is not received, that is, if the PCF 307 rejects it, the QMF 600 determines the value of Max-Supported-Bandwidth-UL of at least one terminating terminal 500. Down-adjust (S511).

At this time, during downregulation, as described above, a QoS Mediation Request message is transmitted. The QMF 600 does not request a value change of Max-Supported-Bandwidth-UL of the mobile router 100 even if at least one end terminal 500 does not accept the QoS down-regulation request. .

In addition, the QMF 600 may adjust the value of the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL).

The QMF 600 determines that the value of the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL) of the mobile router 100 is the minimum supported bandwidth (Min-Supported-Bandwidth-UL) of the at least one end terminal 500. ) It may be determined whether it is greater than the sum of the values of (S503).

At this time, the QMF 600 determines that the value of the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL) of the mobile router 100 in step S503 is the minimum supported uplink bandwidth (Min- Supported-Bandwidth-UL), the value of the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL) allocated to the current end terminal 500 is maintained (S509).

On the other hand, the value of the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL) of the mobile router 100 is the value of the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL) of at least one end terminal 500. If it is less than the sum of , the QMF 600 requests the PCF 307 to increase the value of the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL) of the mobile router 100 (S505). When requesting an uplink, as described above, a QoS Mediation Request message is transmitted.

The QMF 600 determines whether an upstream acceptance response, that is, a QoS Mediation Accept message is received from the PCF 307 (S507).

When the upstream acceptance response is received, step S509 is performed.

On the other hand, if the uplink acceptance response is not received, that is, if the PCF 307 rejects it, the QMF 600 sets the minimum supported uplink bandwidth (Min-Supported-Bandwidth-UL) value of at least one terminating terminal 500. It is adjusted downward (S511).

The QMF 600 does not request a change in the Min-Supported-Bandwidth-UL value of the mobile router 100 even if at least one end device 500 does not accept the QoS down-regulation request.

7 is a flowchart illustrating a process of controlling QoS by a QoS adjusting device according to another embodiment of the present invention.

Referring to FIG. 7, the QMF 600 provides a downlink bandwidth, that is, a value of a maximum supported downlink bandwidth (Max-Supported-Bandwidth-DL) and a value of a minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL). can be adjusted.

The QMF 600 compares the downlink bandwidth DL_BW_1 of the mobile router 100 and the downlink bandwidth DL_BW_2 of at least one end terminal 500 (S601) and determines whether DL_BW_1 is greater than DL_BW_2 (S603) .

At this time, the QMF 600 determines that the value of the maximum downlink supported bandwidth (Max-Supported-Bandwidth-DL) of the mobile router 100 is the maximum downlink supported bandwidth of at least one end terminal 500 (Max-Supported-Bandwidth-DL). It can be determined whether it is greater than the sum of the values of -DL).

The value of the maximum downlink supported bandwidth (Max-Supported-Bandwidth-DL) of the mobile router 100 is the sum of the values of the maximum supported downlink bandwidth (Max-Supported-Bandwidth-DL) of at least one end terminal 500. If it is less than, the value of the maximum downlink supported bandwidth (Max-Supported-Bandwidth-DL) of the end terminal 500 is maintained (S605).

On the other hand, the value of the maximum downlink supported bandwidth (Max-Supported-Bandwidth-DL) of the mobile router 100 is the value of the maximum downlink supported bandwidth (Max-Supported-Bandwidth-DL) of at least one end terminal 500. If it is greater than the sum of , the QMF 600 requests the mobile router 100 to increase the value of the maximum downlink supported bandwidth (Max-Supported-Bandwidth-DL) of the end terminal 500 (S607).

When requesting an uplink, as described above, a QoS Mediation Request message is transmitted.

When the QMF 600 receives an uplink acceptance response, that is, a QoS Mediation Accept message from the mobile router 100, the uplink requested maximum supported bandwidth (Max-Supported-Bandwidth-DL) value is terminated. It is mapped to the terminal 500 and managed.

Even if the mobile router 100 rejects the uplink request for the value of the maximum downlink supported bandwidth (Max-Supported-Bandwidth-DL) of the end terminal 500, the QMF 600 determines the maximum downlink maximum of the mobile router 100 Do not request to change the value of the supported bandwidth (Max-Supported-Bandwidth-DL).

In addition, the QMF 600 determines that the value of the minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL) of the mobile router 100 corresponds to the minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL) of at least one end terminal 500. -DL), the value of the minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL) of the end terminal 500 is maintained.

The QMF 600 determines that the value of the minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL) of the mobile router 100 corresponds to the minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL) of at least one end terminal 500. ), an upward request is made to the mobile router 100 for the value of the minimum supported downlink bandwidth (Min-Desired-Bandwidth-DL) of the end terminal 500 (S607).

When requesting an uplink, as described above, a QoS Mediation Request message is transmitted.

When the QMF 600 receives an uplink acceptance response, that is, a QoS Mediation Accept message from the mobile router 100, it maps the Min-Desired-Bandwidth-DL value requested upstream to the end device 500 for management. do.

Even if the mobile router 100 rejects the uplink request for the value of the minimum downlink supported bandwidth (Min-Desired-Bandwidth-DL) of the end terminal 500, the QMF 600 Do not request to change the value of the supported bandwidth (Min-Desired-Bandwidth-DL).

Here, an uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) value, an uplink minimum supported bandwidth (Min-Supported-Bandwidth-UL) value, a downlink maximum supported bandwidth (Max-Supported-Bandwidth-DL) value, Even when it is determined to maintain the downlink minimum supported bandwidth (Min-Supported-Bandwidth-DL) value, the QMF 600 transmits a QoS Mediation Request message to the mobile router 100 to accept QoS Mediation ( QoS Mediation Accept) message is received.

Meanwhile, FIG. 8 is a hardware configuration diagram of a server device according to an embodiment of the present invention.

Referring to FIG. 8 , the mobile router 100 described in FIGS. 1 to 7 , nodes 301 , 303 , 305 , 307 , 309 , 311 , and 313 included in the dedicated core network 300 and the QMF 600 may execute a program including instructions described to execute the operation of the present invention in the server device 700 operated by at least one processor.

The hardware of the server device 700 may include at least one processor 701 , a memory 703 , a storage 705 , and a communication interface 707 , and may be connected through a bus 709 . In addition, hardware such as an input device and an output device may be included.

The server device 700 may be loaded with various software including an operating system capable of running programs.

The processor 701 is a device for controlling the operation of the server device 700, and may be various types of processors that process commands included in a program, for example, a Central Processing Unit (CPU) or a Micro Processor Unit (MPU). ), MCU (Micro Controller Unit), GPU (Graphic Processing Unit), and the like. The memory 703 can load a corresponding program so that the instructions described to execute the operations of the present invention are processed by the processor 701 . The memory 703 may be, for example, read only memory (ROM) or random access memory (RAM). The storage 805 may store various data, programs, and the like required to execute the operation of the present invention. The communication interface 707 may be a wired/wireless communication module.

The embodiments of the present invention described above are not implemented only through devices and methods, and may be implemented through programs that realize functions corresponding to the configuration of the embodiments of the present invention or a recording medium on which the programs are recorded.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the following claims are also included in the scope of the present invention. that fall within the scope of the right.

Claims (15)

A mobile router connected to at least one end terminal through a short-range communication interface, and a communication interface connected to a Session Management Function (SMF) of a core network to which the mobile router is connected,
memory to store the program; and
including at least one processor to execute the program;
said program,
receiving, from the mobile router, a Quality of Service (QoS) of an end terminal applied by the mobile router to the end terminal at a connection interface between the mobile router and the at least one end terminal;
receiving QoS of a mobile router applied to a data session established between the mobile router and a User Plane Function (UPF) by the session management device from the session management device;
and instructions for down-adjusting or up-regulating the QoS of the at least one terminating device or the QoS of the mobile router so that the QoS of the terminating device corresponds to the QoS of the mobile router. In paragraph 1,
The QoS of the mobile router and the QoS of the at least one end terminal include a downlink bandwidth,
said program,
and instructions requesting the mobile router to increase the downlink bandwidth of the at least one end device when the downlink bandwidth of the at least one end device is smaller than the downlink bandwidth of the mobile router. . In paragraph 1,
The QoS of the mobile router and the QoS of the at least one end terminal include an uplink bandwidth,
said program,
If the uplink bandwidth of the mobile router is smaller than the uplink bandwidth of the at least one end terminal, requesting the policy control function (PCF) of the core network to increase the uplink bandwidth of the mobile router and instructions for maintaining an uplink bandwidth of the at least one end terminal. In paragraph 3,
said program,
When a rejection response to the mobile router's request to increase the uplink bandwidth is received from the policy control device, the QoS adjusting device includes instructions for requesting the mobile router to decrease the uplink bandwidth of the at least one end terminal. . In paragraph 3,
The communication interface is
A QoS adjusting device that is connected to the session management device and the policy control device through an Rx interface to transmit and receive data. In paragraph 5,
said program,
Includes instructions for receiving a QoS allocation message from the session management device through the Rx interface and transmitting a QoS adjustment request message to the policy control device;
The QoS allocation message,
Includes a QoS parameter allocated to the mobile router by the policy control device;
The QoS adjustment request message,
Includes an up-adjusted QoS parameter or a down-adjusted QoS parameter requested to the policy control device;
The QoS parameters,
a maximum supported bandwidth and a minimum supported bandwidth for an uplink IP (Internet Protocol) flow of the mobile router, and a maximum supported bandwidth and a minimum supported bandwidth for a downlink IP flow of the mobile router. In paragraph 3,
The communication interface is
A QoS adjusting device that transmits and receives data with the mobile router using a predetermined dedicated application programming interface (API). In paragraph 7,
said program,
Receives a connection information message informing of access of an end terminal and a connection release information message informing of disconnection of the end terminal from the mobile router using the dedicated API, and transmits a QoS adjustment request message of the end terminal to the mobile router contains commands that
The connection information message and the connection release information message,
including a QoS parameter allocated to the end terminal by the mobile router;
The QoS adjustment request message,
An up-adjusted QoS parameter or a down-adjusted QoS parameter requested from the mobile router;
The QoS parameters,
a maximum supported bandwidth and a minimum supported bandwidth for an uplink IP (Internet Protocol) flow of the end terminal, and a maximum supported bandwidth and a minimum supported bandwidth for a downlink IP flow of the end terminal. A method in which a quality of service (QoS) adjusting device operated by at least one processor controls QoS indicating an amount of allocable communication resources, the method comprising:
Receiving QoS information of the mobile router applied to the data session from a Session Management Function (SMF) of a core network to which the mobile router and the data session are connected;
When an end terminal is connected to the mobile router, receiving access information including QoS information of the end terminal applied to the end terminal by the mobile router at a connection interface between the mobile router and the end terminal from the mobile router step,
comparing the QoS information of the mobile router and the QoS information of the terminating terminal, and determining an increase in the QoS level of the mobile router when the QoS level of the terminating terminal is higher than the QoS level of the mobile router;
requesting an increase in the QoS level of the mobile router to a policy control function (PCF) of the core network; and
requesting the mobile router to maintain the QoS level of the end terminal when an uplink acceptance response of the QoS level is received from the policy control device;
Including, QoS control method. In paragraph 9,
After the step of requesting the upgrade,
requesting a downlink of the QoS level of the end terminal to the mobile router when an uplink rejection response of the QoS level is received from the policy control device;
Further comprising, QoS control method. In paragraph 9,
After requesting to maintain the QoS level of the end terminal,
When the connection between the mobile router and the end terminal is released, receiving connection release information of the end terminal from the mobile router;
obtaining QoS information of the remaining end terminals except for the end terminal from which the connection is released, from the connection release information;
comparing QoS information of the remaining end terminals with QoS information of the mobile router to determine whether to lower the QoS level of the mobile router; and
requesting a decrease in the QoS level of the mobile router to the policy control device when the decision is made to lower the QoS level of the mobile router;
Further comprising, QoS control method. A method in which a quality of service (QoS) adjusting device operated by at least one processor controls QoS indicating an amount of allocable communication resources, the method comprising:
Receiving QoS allocation information of a mobile router from a Session Management Function (SMF) of a core network;
determining whether QoS adjustment of an end terminal connected to the mobile router is necessary based on the QoS allocation information; and
If it is determined that the QoS adjustment is necessary, requesting the mobile router to adjust the QoS of the end terminal;
The QoS of the mobile router is
QoS applied to a data session established between the mobile router and a User Plane Function (UPF) by the session management device;
The QoS of the end terminal is
QoS control method, wherein the QoS is applied by the mobile router to the end terminal in a connection interface between the mobile router and the end terminal. In paragraph 12,
Prior to the receiving step,
Receiving initial QoS information assigned to the mobile router by a policy control function (PCF) of the core network from the session management device while the mobile router establishes a data session with the session management device. include,
The QoS allocation information,
and QoS information changed from the initial QoS information by the policy control device according to a request of an application function (AF) of the core network. In paragraph 13,
The determining step is
Comparing the changed QoS level of the mobile router and the QoS level of the end terminal;
If the changed QoS level is higher than the QoS level of the terminating terminal, determining an upgrade of the QoS level of the terminating terminal; and
If the changed QoS level is lower than the QoS level of the end terminal, determining a downgrade of the QoS level of the end terminal
Including, QoS control method. In paragraph 14,
The requesting step is
and transmitting a QoS adjustment request message including uplinked uplink bandwidth information and downlink bandwidth information or downlinked uplink bandwidth information and downlink bandwidth information to the mobile router.

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