KR20210081167A - QoS MEDIATION APPARATUS AND METHOD OF QoS CONTROL - Google Patents

Abstract

A QoS (Quality of Service) adjustment apparatus and a control method thereof are provided. The device includes a mobile router connected to at least one end terminal and a short-range communication interface, and a communication interface connected to a session management function (SMF) of the core network to which the mobile router is connected, a memory for storing a program, and at least one processor executing the program, wherein the program receives QoS (Quality of Service) 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-regulating 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.

Description

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

The present invention relates to a QoS adjustment apparatus and a QoS control method.

A mobile router is a device that converts a mobile communication signal into a short-range wireless signal, and is also called an egg. Mobile routers are wirelessly connected to end terminals such as mobiles, tablets, laptops, IoT (Internet of Thing) devices, drones, CCTVs, home cams, etc. let there be In general, a mobile router is used as a portable Wi-Fi router.

The mobile router connects to the core network of the mobile operator and connects the data session. In this case, 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 the Subscriber Profile Repository (SPR). The Session Management Function (SMF) applies the QoS assigned by the PCF to the data session of the mobile router.

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 IEEE (Institute of Electrical and Electronics Engineers) 802.11e standard.

As such, the QoS of the mobile router is controlled by the nodes (SPR, PCF, and SMF) of the core network, and the QoS of the end terminal is controlled by the mobile router by 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 separately performed. Accordingly, the core network can control QoS only up to the mobile router, and cannot perform end-to-end QoS control for the end terminal connected to the mobile router.

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

In addition, with the recent spread of Bring Your Own Device (BYOD) services, the number of companies using personal devices for business purposes is rapidly increasing. However, when a privately owned terminal accesses the internal computer network of a company, a security problem may occur due to information leakage or the like. In order to prevent this, a private 5G service is provided.

The Private 5G service provides subscribers with a dedicated 5G network that is separated from the general 5G network for unspecified people. Private 5G service allows closed access and connection only to user terminals or objects belonging to specific corporate subscribers, e.g., factories, airports, ports, hospitals, offices, universities, logistics centers, local governments, government agencies, National Intelligence Service, power plants, etc. do. Since the Private 5G service is aimed at corporate subscribers, it can be said that it is an enterprise-only 5G service. The Private 5G service is a B2B-specialized service that enables convenient use of users and strong security of subscriber data at once.

However, when installing a mobile router in a company to connect various terminals to a dedicated core network in order to provide a private 5G service, interference 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 that QoS quality is deteriorated.

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

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 the end terminal connected to the mobile router and the QoS of the mobile router to correspond to each other by interworking with the mobile router and the core network is to provide

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

The QoS adjustment device is configured to determine that the QoS of the mobile router and the QoS of the at least one end terminal include a downlink bandwidth, and the program is configured such that the downlink bandwidth of the at least one end terminal is the downlink bandwidth of the mobile router. If smaller, it may include instructions for requesting the mobile router to adjust the downlink bandwidth of the at least one end terminal.

The QoS of the mobile router and the QoS of the at least one end terminal include an uplink bandwidth, and the program is configured to: if the uplink bandwidth of the mobile router is less than the uplink bandwidth of the at least one end terminal, the It may include instructions for requesting an uplink bandwidth adjustment of the mobile router from 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/receive data.

The program includes instructions for receiving a QoS assignment message from the session management device through the Rx interface and sending a QoS adjustment request message to the policy control device, wherein the QoS assignment message includes: a QoS parameter assigned to the router, wherein the QoS adjustment request message includes an uplink QoS parameter or a down-tuned QoS parameter requesting from the policy control device, wherein the QoS parameters are 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 to and from the mobile router using a pre-specified dedicated application programming interface (API).

The program uses the dedicated API to receive, from the mobile router, an access information message informing the access of the end terminal and a connection release information message informing the disconnection of the end terminal, and adjusts the QoS of the end terminal to the mobile router. instructions for transmitting a request message, wherein the access information message and the connection release information message include a QoS parameter assigned by the mobile router to the end terminal, and the QoS adjustment request message requests the mobile router to a maximum supported bandwidth and a minimum supported bandwidth for an uplink Internet Protocol (IP) flow of the end terminal, and a downlink of the end terminal; It may include a maximum supported bandwidth and a minimum supported bandwidth for an IP flow.

According to another embodiment of the present invention, a QoS (Quality of Service) adjustment apparatus 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 QoS information of the end terminal from the mobile router Comparing the QoS information of the mobile router with the QoS information of the end terminal, if the QoS level of the end terminal is higher than the QoS level of the mobile router, determining an upgrade of the QoS level of the mobile router; requesting an upgrade of the QoS level of the mobile router from a Policy Control Function (PCF) of the core network, and when receiving a QoS level up-acceptance response from the policy control device, the terminal is sent to the mobile router and requesting to maintain the QoS level of the terminal.

The method may further include, after requesting for the uplink, if a response of rejecting the uplink of the QoS level is received from the policy control device, requesting the downlink of the QoS level of the end terminal from the mobile router.

After the step of requesting to maintain the QoS level of the end terminal, if the connection between the mobile router and the end terminal is released, receiving the connection release information of the end terminal from the mobile router; obtaining QoS information of the other end terminals except for the released end terminal; determining whether to downgrade the QoS level of the mobile router by comparing the QoS information of the remaining end terminals with the QoS information of the mobile router; and The method may further include, when the QoS level of the mobile router is determined to be downgraded, requesting the policy control device to downgrade the QoS level of the mobile router.

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

Prior to the receiving, initial QoS information allocated to the mobile router by a Policy Control Function (PCF) of the core network is managed by the mobile router while establishing a data session with 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 may include comparing the changed QoS level of the mobile router with the QoS level of the end terminal, and if the changed QoS level is higher than the QoS level of the end terminal, determining an upgrade of the QoS level of the end terminal step, 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.

The requesting may include transmitting a QoS adjustment request message including uplink bandwidth information and downlink bandwidth information adjusted up, or downlink bandwidth information adjusted downlink and uplink bandwidth information to the mobile router.

According to the embodiment, if the core network provides high QoS to the mobile router, the mobile router provides high QoS to the end terminal to respond, and if the core network provides low QoS to the mobile router, the mobile router responds to the end terminal low QoS can be provided.

In addition, if the mobile router provides high QoS to the end terminal, the core network provides 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 of the mobile router of the core network and the QoS control of the end terminal of the mobile router can be matched with each other through the QoS adjustment device interworking with the core network and the mobile router. QoS control becomes possible.

1 is a block 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 disconnects from a mobile router according to an embodiment of the present invention.
5 is a flowchart illustrating a QoS control process when 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 in which the QoS adjustment apparatus controls QoS according to an embodiment of the present invention.
7 is a flowchart illustrating a process in which the QoS adjustment apparatus controls QoS 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 of ordinary skill in the art to which the present invention pertains can easily implement them. 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 part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

In addition, terms such as “…unit”, “…group”, 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

The devices described in the present invention are composed of hardware including at least one processor, a memory device, a communication device, and the like, and a program 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 for implementing the method of operation of the present invention described with reference to the drawings, and is combined with hardware such as a processor and a memory device to execute the present invention.

As used herein, "transmission or provision" may include not only direct transmission or provision, but also transmission or provision indirectly through another device or using a detour path.

In the present specification, expressions described in the singular may be construed in the singular or plural unless an explicit expression such as “a” or “single” is used.

In this specification, the same reference numbers refer to the same components regardless of the drawings, and "and/or" includes each and every combination of one or more of the referenced components.

In this specification, terms including an ordinal number such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

In the present specification, a terminal is a generic concept meaning a user terminal in communication, and is 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 equipment, access terminal, wireless device, etc., may be called terms such as UE, MS, MT, SS, PSS, AT, mobile station, mobile terminal, subscription It may include all or part of the functions of a home country, a portable subscriber station, a user equipment, an access terminal, a wireless device, and the like.

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

The terminal includes various types of communication terminals such as mobile terminals such as smartphones, tablet terminals such as smart pads and tablet PCs, computers, and televisions.

Base Station (BS) is an Access Point (AP), Radio Access Station (RAS), Node B (Node B), Base Transceiver Station (BTS), MMR (Mobile Multihop Relay) )-BS, etc. may refer to, and may include all or some functions of an access point, a radio access station, a Node B, a transceiver base station, an MMR-BS, and the like.

Embodiments of the present invention include 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) systems, and Study on Architecture for Next Generation System (FS_NextGen) systems. may be supported by relevant standard documents. That is, steps or parts not described in order to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the document. In addition, all terms disclosed in this document may 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 is a 5G Non Standalone (NSA) core network and a 5G SA (Stand Alone) core network. may include

The 5G NSA/SA core network includes AMF (Access and Mobility Function), SMF (Session Management Function), UPF (User Plane Function), UDM (User Data Management), UDR (Unified Data Repository), PCF (Policy Control Function), 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 the terminal to the PDN (Packet Data Network).

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

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

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

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

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

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

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

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

The core network 300 includes an AMF 301 , a UDM/UDR 303 , an SMF 305 , a PCF 307 , an SPR 309 , a UPF 311 , and an AF 313 . These configurations (301, 303, 305, 307, 309, 311, 313) are well-known 5G core equipment, and a detailed description thereof will be omitted.

The mobile router 100 is a device that converts a mobile communication signal into a short-range wireless signal, and is also called an egg. The mobile router is wirelessly connected to the end terminal 500 so that they are connected to the core network 300 to use a mobile communication service.

In this case, the mobile router 100 may operate as a portable Wi-Fi router connected to a plurality of end terminals 500 and 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 the end terminals 500 . Here, the dedicated network service may be an enterprise-only 5G service.

The mobile router 100 may be installed in a building, office, field, etc. of a corporate subscriber to connect the end terminals 500 to the core network 300 . In this case, the core network 300 may be implemented as a dedicated core network differentiated from the general network, and the PDN 400 may be a dedicated network. In this case, the core network 300 may be referred to as an enterprise-only 5G core network.

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

In this case, the mobile router described above may be used for the subscriber terminal.

The mobile router 100 connects to the base station 200 by wireless communication using a wireless communication frequency, and uses a connection interface separate 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 access to the public network may exist. In this case, the public network and the dedicated network mean separate traffic paths, and do not necessarily need to be physically separated. For example, a public network and a private network may be different bearers created on the same physical path.

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

In another embodiment of the present invention, the core network 300 may be divided into a general core network and an enterprise-specific core network. In this case, the mobile router 100 may include a corporate-only network switching function. When the mobile router 100 is basically connected to the general core network and performs enterprise-dedicated 5G ON triggering, the network switch request to the enterprise-dedicated core network is transmitted to the currently connected general core network and is connected to the general core network. After release, it is connected to the company's dedicated core network. In addition, if the mobile router 100 performs ON triggering of the general core network while connected to the enterprise-dedicated core network, the network switch request to the general core network is transferred to the currently connected enterprise-dedicated core network, After disconnection, it is connected to the general core network. In this case, QoS control according to an embodiment of the present invention may be performed in both the general core network and the dedicated core network.

At least one end terminal 500 connected to the mobile router 100 is a terminal in a user contact point, but may be a device without a communication module or without a Universal Subscriber Identity Module (USIM).

The end terminal 500 connects to 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, a notebook, a pad, a smart phone, a PDA (Personal Digital Assistants), an MP3, 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 connectable to the mobile router 100 through wireless LAN communication.

In addition, the end terminal 100 includes a subscriber module (USIM), but may include another communication terminal (eg, a smartphone) that cannot receive network authentication due to a wrong communication company.

The end terminal 500 is connected to the mobile router 100 and accesses the base station 200 via the mobile router 100 , and receives a data service through the core network 300 connected 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 IEEE (Institute of Electrical and Electronics Engineers) 802.11e standard. can do. The IEEE 801.11e standard defines two modes, that is, a Wi-Fi Multimedia Extensions (WMM) method and a Wi-Fi Scheduled Multimedia (WSM) method.

In WMM, 8 priorities are defined for each Access Category (Voice, Video, Best Effort, Background). For uplink traffic sent by the end terminal 500 to the mobile router 100 and downlink traffic sent from the PDN 400 to the mobile router 100, the mobile router 100 is AC Classify and process high-priority traffic first, and low-priority traffic later. In this way, the WMM method enables Prioritized QoS control.

In the WSM method, the mobile router 100 grants a radio frequency use opportunity and use time for each end terminal 500 , and the end terminal 500 sends uplink traffic to the mobile router 100 and the PDN 400 . QoS for downlink traffic sent to the mobile router 100 can be controlled. In this way, the WSM method enables Parameterized QoS control.

In this way, although the end terminal 500 and the mobile router 100 are connected to each other, QoS control is performed separately. Therefore, it is not possible to directly control the QoS for the end terminal 500 in the core network 300 . That is, end-to-end QoS control for the end terminal 500 of the core network 300 is impossible.

Although the mobile router 100 provides high QoS to the end terminal 500 , if the core network 300 provides low QoS to the mobile router 100 , the end terminal 500 has no choice but to communicate with low QoS. In addition, even if the core network 300 provides high QoS to the mobile router 100, if the mobile router 100 provides low QoS to the end terminal 500, the end terminal 500 can communicate with low QoS. there is only

In order to solve this problem, a new node called QMF 600 is proposed in the embodiment of the present invention.

The QMF 600 is a QoS regulating device that manages and mediates QoS situations, and interworks with the mobile router 100 using a pre-specified dedicated application programming interface (API).

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

The QMF 600 adjusts the QoS of the end terminal 500 or the QoS of the mobile router 100 down or up so that the QoS of the at least one end terminal 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 provides QoS control information of the mobile router 100 for 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 DL. At this time, 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 indicating the level of QoS. .

The QMF 600 may manage by mapping 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.

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

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

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.

Referring to FIG. 2 , when a PDN access event occurs, such as when the mobile router 100 is powered 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 inquire subscriber information to perform network authentication (S105). Step S105 corresponds to network authentication through authentication vector exchange and the like and a procedure for determining whether the mobile router 100 is a network-accessible subscriber.

The AMF 301 transmits a Create Session Request to the SMF 305 using the 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 matching the APN-OI Replacement of the mobile router 100 .

In this case, if APN-OI Replacement indicates access to a dedicated network, the SMF 305 may be a dedicated core node.

The SMF 305 performs Remote Authentication Dial In User Service (RADIUS) access authentication in conjunction with the SPR 309 . 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). In this case, when the PDN 400 is a dedicated network, the SPR 309 may determine whether the mobile router 100 can access the dedicated network.

The SPR 309 transmits a RADIUS access response including the result of performing the authentication 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). The CCR-I message contains a QoS request.

The PCF 307 transmits a Sending Limit Notification Request (SNR) message to the SPR 309 (S117). The SNR message includes a subscriber information request from 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 Credit Control Answer-Initial (CCA-I) 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 (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 through the base station (gNB) 200 .

At this time, after step S127, the SMF 305 provides the QoS information allocated to the mobile router 100 to the QMF 600, 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 ). In this case, step S201 may be added after step S127 of FIG. 2 .

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

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

In Table 1, Attribute is a parameter name. Presence indicates whether a parameter is required in the message format. If the parameter is required, M (Mandatory) is indicated, and if the parameter is optional, it is indicated as O (Optional). Lenth is the length of the parameter value, the number of digits. The same applies 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 includes terminal information (MDN, IMSI, Framed-IP-Address, Framed-IP-Network, Framed-) of the mobile router 100 connected to the core network 300 . IPv6-Prefix, etc.) and QoS control information of the mobile router 100 (QCI, 5QI, ARP, maximum speed, minimum speed, etc.). Here, the maximum speed may be expressed as an uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) and a downlink maximum supported bandwidth (Min-Desired-Bandwidth-UL) of the mobile router 100 . The minimum speed may be expressed as an uplink minimum supported bandwidth (Min-Desired-Bandwidth-DL and a downlink minimum supported bandwidth (Min-Desired-Bandwidth-DL) of the mobile router 100 ).

In this case, the QoS allocation information in 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 .

The 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-end MDN
Example: 01022007700 IMSI M 15 End-end IMSI
Example: 450081022007700 Framed-IP-Address O 12 End-end IPv4 address
Example: 192.168.2.251 (dot '.' omitted) Framed-IP-Network O 12 End terminal IPv4 subnet mask
Example: 255.255.255.0 (dot '.' omitted) Framed-IPv6-Prefix O 32 End-end 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 (colon ':' omitted) SSID O 32 End terminal's wireless network name
Example: KT_1100_media Port O 5 End terminal port address
Example: 22 Max-Supported-Bandwidth-UL O 32 The maximum supported bandwidth for transmitting uplink IP flow traffic to the end terminal (unit: bits/s) Max-Supported-Bandwidth-DL O 32 The maximum supported bandwidth for transmitting the downlink IP flow traffic of the end terminal (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for transmission of uplink IP flow traffic from end-to-end (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth for transmission of downlink IP flow traffic from end-to-end (unit: bits/s)

According to Table 2, the terminal attachment information (UE Attach Information) message is the connection status information (UE-Status) of the end terminal 500, the terminal information (MDN, IMSI, Framed-IP-Address, Framed) of the end terminal 500 -IP-Network, Framed-IPv6-Prefix, MAC-Address, SSID, Port, etc.) and QoS control information (maximum speed, minimum speed) set for the end terminal 500 are included. Here, the maximum speed may be expressed as an uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) and a downlink maximum supported bandwidth (Min-Desired-Bandwidth-UL) of the end terminal 500 . The minimum speed may be expressed by an uplink minimum supported bandwidth (Min-Desired-Bandwidth-DL and a downlink minimum supported bandwidth (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 all QoS information of the end terminal 500 accessed in step S203 and the QoS information of at least one end terminal 500 that has already been connected to it and compare it with the QoS information of the mobile router 100 .

The QMF 600 determines whether the QoS of the mobile router 100 needs to be upgraded (S209).

If it is determined in step S209 that the QoS upgrade is not necessary, 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).

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

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

At this time, WMM-Priority, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, Min-Desired-Bandwidth-DL contains 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).

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

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

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

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

The QoS adjustment rejection (QoS-Mediation-Reject) message may be implemented as shown in Table 5.

Attribute Presence Length Description MDN M 11 MDN of the end terminal
Example: 01022007700 IMSI M 15 IMSI of the end terminal
Example: 450081022007700 Framed-IP-Address O 12 IPv4 address of end terminal
Example: 192.168.2.251 (dot '.' omitted) Framed-IP-Network O 12 IPv4 Subnet Mask of the end terminal
Example: 255.255.255.0 (dot '.' omitted) Framed-IPv6-Prefix O 32 IPv6 address of end terminal
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF Reject M 11 Reason for rejection
Example: Reason for not being able to raise QoS of end-end terminal

According to Table 5, the QoS adjustment rejection (QoS-Mediation-Reject) message includes the reason for rejecting the QoS adjustment of the end terminal 500 .

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

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

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

Attribute Presence Length Description MDN M 11 MDN of mobile router
Example: 01022007700 IMSI M 15 IMSI on mobile router
Example: 450081022007700 Framed-IP-Address O 12 IPv4 address of mobile router
Example: 192.168.2.251 (dot '.' omitted) Framed-IP-Network O 12 IPv4 Subnet Mask of Mobile Router
Example: 255.255.255.0 (dot '.' omitted) Framed-IPv6-Prefix O 32 IPv6 address of mobile router
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF 5QI O 32 5QI information of mobile router ARP O 32 ARP information of mobile router Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth for uplink IP flow traffic transmission of mobile router (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth for downlink IP flow traffic transmission of mobile router (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for transmitting upstream IP flow traffic of mobile router (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth for downlink IP flow traffic transmission of mobile router (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). In this case, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL include values for requesting upward adjustment.

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

If it is determined that the QoS upgrade is possible, the PCF 307 transmits a QoS Mediation Accept message to the QMF 600 (S223).

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

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

Table 7 is the same as Table 6, and QoS information includes upwardly adjusted values. When the QMF 600 receives a QoS Mediation Accept message, the QMF 600 determines QoS maintenance 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). In this case, 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 in Table 4.

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

At this time, in step S227, a QoS rejection response message may be received, 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 to the SMF 305 for requesting a QoS upgrade. (S233).

The SMF 305 transmits a re-authentication answer (hereinafter, collectively referred to as 'RAA') message for the QoS uplink response to the PCF 307 (S235). Then, 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 session modification to apply the changed QoS to the UPF 311 (S239) and receives a Session Establishment Response message (S241). Reset the data session.

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

The QoS adjustment rejection (QoS-Mediation-Reject) message may be implemented as shown in Table 8 below.

Attribute Presence Length Description MDN M 11 MDN of mobile router
Example: 01022007700 IMSI M 15 IMSI on mobile router
Example: 450081022007700 Framed-IP-Address O 12 IPv4 address of mobile router
Example: 192.168.2.251 (dot '.' omitted) Framed-IP-Network O 12 IPv4 Subnet Mask of Mobile Router
Example: 255.255.255.0 (dot '.' omitted) Framed-IPv6-Prefix O 32 IPv6 address of mobile router
Example: FDEC:BA98:7654:3210:ADFC:BDFF:2990:FFFF Reject M 11 Reject reason example: QoS cannot be raised due to exhaustion of personal limit of mobile router

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

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

QoS Mediation Request message is the same as in Table 3, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, Min-Desired-Bandwidth-DL are down-regulated. 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, except that Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, Min-Desired-Bandwidth-DL is in step S247. The values received from

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

4 is a flowchart illustrating a QoS control process when an end terminal disconnects 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 the terminal information and QoS control information of the disconnected end terminal 500 to the terminal. It is transmitted to the QMF 600 through a connection release information (UE-Detach-Information) message (S303).

A 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-end MDN
Example: 01022007700 IMSI M 15 End-end IMSI
Example: 450081022007700 Framed-IP-Address O 12 End-end IPv4 address
Example: 192.168.2.251 (dot '.' omitted) Framed-IP-Network O 12 End terminal IPv4 subnet mask
Example: 255.255.255.0 (dot '.' omitted) Framed-IPv6-Prefix O 32 End-end 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 (colon ':' omitted) SSID O 32 End terminal's wireless network name
Example: KT_1100_media Port O 5 End terminal's port address
Example: 22 Max-Supported-Bandwidth-UL O 32 Maximum supported bandwidth for transmission of uplink IP flow traffic of the end terminal (unit: bits/s) Max-Supported-Bandwidth-DL O 32 Maximum supported bandwidth for downlink IP flow traffic transmission of the end terminal (unit: bits/s) Min-Desired-Bandwidth-UL O 32 Minimum supported bandwidth for uplink IP flow traffic transmission of the end terminal (unit: bits/s) Min-Desired-Bandwidth-DL O 32 Minimum supported bandwidth (unit: bits/s) for downlink IP flow traffic transmission of the end terminal

According to Table 9, the terminal connection release information is the same as in Table 2. In this case, Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, and Min-Desired-Bandwidth-DL include values assigned to the end terminal 500 from which the 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 downgrade of the mobile router 100 is necessary (S307). This is a process of determining whether it is necessary to minimize idle resources through QoS downlink because the uplink and downlink resources provided to the end terminal 500 become idle resources due to the disconnection of the end terminal 500 .

If the QMF 600 does not require QoS downgrade of the mobile router 100, the step ends.

If it is determined that the QoS downgrade 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, Min-Desired-Bandwidth-DL are The down-adjusted value is recorded.

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

The PCF 405 transmits a 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, Min-Desired-Bandwidth-DL are The down-adjusted value is recorded.

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

The SMF 305 transmits a Session Establishment Request message for requesting session modification to apply the downlink requested QoS to the session to the UPF 311 (S319). And receives a session establishment response (Session Establishment Response) message from the UPF (311) (S321).

5 is a flowchart illustrating a QoS control process when 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 proceed in parallel.

Referring to FIG. 5 , the AF 313 determines the QoS change 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, may be a case in which a QoS up request or downlink request of a corporate subscriber is input.

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

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

The PCF 307 transmits an RAR message requesting a 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).

QoS Allocation Information message is the same as in Table 1, but Max-Supported-Bandwidth-UL, Max-Supported-Bandwidth-DL, Min-Desired-Bandwidth-UL, Min-Desired-Bandwidth-DL are changed values This is included

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

In step S419, information obtained by adding the changed QoS information of the mobile router 100 and QoS information allocated to at least one end terminal 500 in the 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 for 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).

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

The mobile router 100 performs QoS allocation and control of at least one end terminal 500 using a predefined QoS control method based on the changed QoS information received in step S421 (S425).

6 is a flowchart illustrating a process in which the QoS adjustment apparatus controls QoS 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- or down-regulation of the end terminal 500 in FIGS. 3 to 5 .

6, the QMF 600 compares (S501) 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 to determine whether UL_BW_1 is greater than UL_BW_2 It is determined (S503).

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

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

At this time, the at least one end terminal 500 includes the end terminal 500 that is already connected and the end terminal 500 that is newly connected.

In step S503, the value of the uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) of the mobile router 100 is the uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) of at least one end terminal 500 . If it is greater than the sum of the values, the value of the uplink maximum supported 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 uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) of the mobile router 100 is the uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) of at least one end terminal 500 . ), the QMF 600 requests an uplink value of the uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) of the mobile router 100 to the PCF 307 (S505). When requesting an uplink, as described above, a QoS Mediation Request message is transmitted.

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

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

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

In this case, during down-regulation, as described above, a QoS Mediation Request message is transmitted. The QMF 600 does not request to change the value of the uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) of the mobile router 100 even if at least one end terminal 500 does not accept the QoS down adjustment request. .

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

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

In this case, the QMF 600 determines that the value of the minimum uplink supported bandwidth (Min-Supported-Bandwidth-UL) of the mobile router 100 in step S503 is the uplink minimum supported bandwidth of at least one end terminal 500 (Min- If it is greater than the sum of the values of Supported-Bandwidth-UL, the value of the uplink minimum supported bandwidth (Min-Supported-Bandwidth-UL) allocated to the current end terminal 500 is maintained (S509).

On the other hand, the value of the minimum uplink supported bandwidth (Min-Supported-Bandwidth-UL) of the mobile router 100 is the value of the minimum uplink supported bandwidth (Min-Supported-Bandwidth-UL) of at least one end terminal 500 . If it is less than the sum of these values, the QMF 600 requests the PCF 307 to increase the value of the uplink minimum supported 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 uplink acceptance response, that is, a QoS Mediation Accept message, is received from the PCF 307 (S507).

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

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

The QMF 600 does not request to change the uplink minimum supported bandwidth (Min-Supported-Bandwidth-UL) value of the mobile router 100 even if at least one end terminal 500 does not accept the QoS down adjustment request.

7 is a flowchart illustrating a process in which the QoS adjustment apparatus controls QoS according to another embodiment of the present invention.

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

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

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

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

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

Even if the mobile router 100 rejects the uplink request for the value of the downlink maximum supported bandwidth (Max-Supported-Bandwidth-DL) of the end terminal 500 , the QMF 600 is the 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 downlink minimum supported bandwidth (Min-Desired-Bandwidth-DL) of the mobile router 100 is the downlink minimum supported bandwidth (Min-Desired-Bandwidth) of at least one end terminal 500 . -DL), the value of the downlink minimum supported bandwidth (Min-Desired-Bandwidth-DL) of the end terminal 500 is maintained.

The QMF 600 indicates that the value of the downlink minimum supported bandwidth (Min-Desired-Bandwidth-DL) of the mobile router 100 is the downlink minimum supported bandwidth (Min-Desired-Bandwidth-DL) of at least one end terminal 500 . ), the mobile router 100 requests an uplink value of the downlink minimum supported 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 an uplink acceptance response, that is, a QoS Mediation Accept message, is received from the mobile router 100, the QMF 600 maps the uplink-requested Min-Desired-Bandwidth-DL value to the end terminal 500 and manages it. do.

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

Here, uplink maximum supported bandwidth (Max-Supported-Bandwidth-UL) value, uplink minimum supported bandwidth (Min-Supported-Bandwidth-UL) value, downlink maximum supported bandwidth (Max-Supported-Bandwidth-DL) value, Even when determining 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 adjustment ( 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 , nodes 301 , 303 , 305 , 307 , 309 , 311 , 313 and QMF 600 included in the mobile router 100 , the dedicated core network 300 described in FIGS. 1 to 7 , 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.

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 driving a program.

The processor 701 is a device for controlling the operation of the server device 700 , and may be various types of processors that process instructions included in a program, for example, a central processing unit (CPU), a micro processor unit (MPU), and a microprocessor unit (MPU). ), microcontroller unit (MCU), graphic processing unit (GPU), and the like. The memory 703 may load a corresponding program so that instructions described to execute the operation of the present invention are processed by the processor 701 . The memory 703 may be, for example, read only memory (ROM), random access memory (RAM), or the like. The storage 805 may store various data, programs, etc. required for executing the operation of the present invention. The communication interface 707 may be a wired/wireless communication module.

The embodiment of the present invention described above is not implemented only through the apparatus and method, and may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is 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 improved forms of the present invention are also provided by those skilled in the art using the basic concept of the present invention as defined in the following claims. is 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 respectively connected to a session management function (SMF) of a core network to which the mobile router is connected;
memory to store the program, and
at least one processor executing the program;
The program is
receiving the QoS (Quality of Service) of the at least one end terminal from the mobile router;
receiving the QoS of the mobile router from the session management device;
and instructions for down-adjusting or up-regulating 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. In claim 1,
The QoS of the mobile router and the QoS of the at least one end terminal include a downlink bandwidth,
The program is
When the downlink bandwidth of the at least one end terminal is smaller than the downlink bandwidth of the mobile router, the QoS adjustment apparatus including instructions for requesting the mobile router to adjust the downlink bandwidth of the at least one end terminal . In claim 1,
The QoS of the mobile router and the QoS of the at least one end terminal include an uplink bandwidth,
The program is
When the uplink bandwidth of the mobile router is smaller than the uplink bandwidth of the at least one end terminal, requesting an uplink bandwidth adjustment of the mobile router to a policy control function (PCF) of the core network, and instructions for maintaining an uplink bandwidth of the at least one end terminal. In claim 3,
The program is
and 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. In claim 3,
The communication interface is
A QoS adjustment device for transmitting and receiving data by being connected to the session management device and the policy control device through an Rx interface. In claim 5,
The program is
and 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,
The QoS allocation message is
a QoS parameter assigned to the mobile router by the policy control device;
The QoS adjustment request message is
It includes an upwardly adjusted QoS parameter or a downwardly adjusted QoS parameter to request from the policy control device,
The QoS parameters are
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 claim 3,
The communication interface is
A QoS adjustment device for transmitting and receiving data to and from the mobile router using a pre-specified dedicated application programming interface (API). In claim 7,
The program is
Using the dedicated API, an access information message notifying the access of the end terminal and a connection release information message informing the disconnection of the end terminal are received from the mobile router, and a QoS adjustment request message of the end terminal is sent to the mobile router including commands to
The access information message and the connection release information message,
including the QoS parameters allocated to the end-terminal by the mobile router;
The QoS adjustment request message is
It includes an up-regulated QoS parameter or a down-tuned QoS parameter requesting the mobile router,
The QoS parameters are
A QoS adjustment apparatus comprising a maximum supported bandwidth and a minimum supported bandwidth for an uplink Internet Protocol (IP) 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 for controlling QoS, in which a Quality of Service (QoS) adjustment device operated by at least one processor, indicates an amount of an allocatable communication resource, the method comprising:
receiving QoS information of the mobile router from a Session Management Function (SMF) of a core network in which the mobile router and the data session are connected;
When the end terminal is connected to the mobile router, receiving access information including QoS information of the end terminal from the mobile router;
comparing the QoS information of the mobile router with the QoS information of the end terminal, and if the QoS level of the end terminal is higher than the QoS level of the mobile router, determining an upgrade of the QoS level of the mobile router;
requesting an upgrade of 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 receiving an uplink acceptance response of the QoS level from the policy control device;
Containing, QoS control method. In claim 9,
After the step of requesting the upgrade,
requesting the mobile router to lower the QoS level of the end-end terminal when receiving a QoS level up-rejection response from the policy control device;
Further comprising, QoS control method. In claim 9,
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;
obtaining QoS information of the other end-end terminals except for the end-terminal whose connection is released from the access release information;
determining whether to downgrade the QoS level of the mobile router by comparing the QoS information of the remaining end terminals with the QoS information of the mobile router; and
when it is determined to downgrade the QoS level of the mobile router, requesting the policy control device to downgrade the QoS level of the mobile router
Further comprising, QoS control method. A method for controlling QoS, in which a Quality of Service (QoS) adjustment device operated by at least one processor, indicates an amount of an allocatable communication resource, the method comprising:
Receiving QoS allocation information of the mobile router from a session management device (SMF, Session Management Function) of the core network;
determining, based on the QoS allocation information, whether QoS adjustment of an end terminal connected to the mobile router is necessary; and
if it is determined that the QoS adjustment is necessary, requesting the mobile router to adjust the QoS of the end terminal;
Containing, QoS control method. In claim 12,
Prior to the receiving step,
Receiving the initial QoS information allocated 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 including,
The QoS allocation information is
The QoS control method comprising 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 claim 13,
The determining step is
comparing the changed QoS level of the mobile router with the QoS level of the end terminal;
If the changed QoS level is higher than the QoS level of the end terminal, determining the QoS level of the end terminal to be raised, 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
Containing, QoS control method. 15. In claim 14,
The requesting step is
A QoS control method for transmitting, to the mobile router, a QoS adjustment request message including uplink bandwidth information and downlink bandwidth information adjusted up, or downlink bandwidth information and downlink bandwidth information adjusted down.

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