WO2019083223A1

WO2019083223A1 - Terminal device, data transmission/reception device, and operating method of device

Info

Publication number: WO2019083223A1
Application number: PCT/KR2018/012330
Authority: WO
Inventors: 이동진
Original assignee: 에스케이텔레콤 주식회사
Priority date: 2017-10-25
Filing date: 2018-10-18
Publication date: 2019-05-02

Abstract

The present invention presents a novel technology capable of autonomously controlling propagation path steering for a user's traffic from a terminal point of view, that is, a technology implementing ULCL of a terminal subject so as to be capable of resolving concerns about a conventional 5G ULCL function and be capable of efficiently supporting requests and performance of a URLLC service supported in 5G.

Description

Terminal device and data transmission / reception device, operation method of the device

TECHNICAL FIELD [0002] The present invention relates to a technique by which a terminal can control its own data delivery path.

The present invention claims priority from Korean Patent Application No. 10-2017-0139312, filed October 25, 2017, the entire contents of which are incorporated herein by reference for all purposes.

As the type of communication service and the transmission request speed in the LTE communication system have become various, the LTE frequency extension and the evolution to the 5G communication system are actively proceeding.

This rapidly evolving 5G communication system is designed to accommodate as many terminals as possible on the basis of limited radio resources and to provide enhanced mobile broadband (EMBB), massive machine type communications (MMTC) And various service types such as URLLC (ultra-reliable and low latency communications, highly reliable and low latency communication).

In particular, the 5G defines a network structure for end-to-end support of terminal, base station (access), core and server.

Specifically, in the 5G, unlike the existing LTE (4G), a network structure is defined in which a control signaling function area and a data transmission / reception function area (User Plane) are classified.

In this case, the control node of the control plane in the 5G includes an Access and Mobility Function (AMF) for controlling access to the wireless section of the terminal, a Policy Control Function (PCF) for managing / controlling policies such as subscriber information and subscriber- ), A session management function (SMF) for managing and controlling sessions for using data services for each terminal, and the like.

The data node of User Plane in 5G is defined as a UPF (User Plane Function) that transmits and receives data between a terminal and a data network (for example, the Internet) through a session with the terminal based on the SMF control .

On the other hand, the 5G defines a ULCL (Uplink Classifier) that steers the terminal's traffic to a local network close to the UE in the UPF of the User Plane.

The ULCL function is briefly described as follows.

The SMF is based on the information that the UPF transmits information such as the terminal identifier / destination IP address / Prefix of the traffic to be steered to the local network by each UPF of the User Plane.

Accordingly, the UPF is a method of steering the corresponding uplink packet (traffic) among the received uplink packets to the local network based on information received from the SMF.

In other words, according to 5G ULCL function, UPF is totally dependent on information received from SMF.

Therefore, from the viewpoint of SMF, there is a problem of overhead to continuously manage a large amount of information such as a terminal identifier / destination IP address / Prefix to be delivered to each UPF, and in view of the UPF, There is a problem of overhead to continuously manage information such as identifier / destination IP address / prefix. Of course, there is also a problem of increased signaling between the SMF and the UPF.

On the other hand, from the viewpoint of the terminal or the user, there is a demand to know and control the propagation path stealing for the own traffic, but currently, the ULCL function of 5G can not satisfy this demand at all.

Accordingly, the present invention proposes a new scheme for the terminal to control the propagation path steering for its own traffic, thereby effectively solving the above-mentioned problem of the current 5G ULCL function.

An object of the present invention is to realize a method by which a terminal can control its own data delivery path.

According to an embodiment of the present invention, the data transmitting and receiving apparatus includes: a confirmation unit for confirming whether specific information defining a transmission path exists in the received uplink packet; A path setting unit configured to generate a transmission path based on the specific information and to set the transmission path as a service flow path of the uplink packet when the specific information exists; And a transmitting unit for transmitting an uplink packet, which is divided into the service flow among the received uplink packets, to the transmission path.

Specifically, the mobile communication terminal further includes a local interworking unit for interworking with at least one local network, and supporting at least one transmission path generation with a device in each local network as a destination; The route setting unit may generate a delivery route in accordance with the specific information within a range supported by the local interlocking unit.

In particular, the at least one local network may include at least one of an internal network in which the other data transmitting / receiving apparatus is located and a local data network in which the local server is located.

Specifically, the path setting unit stores the service flow classification information of the uplink packet and the mapping information that maps the generated transmission path in a route table, and transmits a delivery path generated according to the specific information to the uplink packet Service flow path.

Specifically, the transmitting unit may transmit an uplink packet in the case where specific information among the received uplink packets exists but the path setting unit fails to generate a transmission path according to specific information, to the default data network.

Specifically, the transmitting unit may transmit an uplink packet when the service flow classification information of the received uplink packet is not present in the path table, to the default data network.

Specifically, when the reception of the uplink packet into which the request information requesting deletion of the transmission path is inserted is confirmed, the path setting unit may delete the transmission path set as the service flow path of the uplink packet.

According to an embodiment of the present invention, a terminal apparatus includes: a classification unit for classifying a service flow of an uplink packet to be transmitted; An information inserter for inserting specific information defining a delivery path of a service flow into an uplink packet of a service flow according to the satisfied triggering condition among the separated service flows when the predefined triggering condition is satisfied; And a transmitter for transmitting the uplink packet to the data node.

Specifically, the information inserting unit may insert the specific information into the first uplink packet of the service flow.

Specifically, in an information table composed of a plurality of specific information, policy information for selecting specific information based on the triggering condition is pre-stored; The information inserting unit can select and insert the specific information based on the information table and the policy information.

Specifically, the triggering condition is used when a specific service flow requiring a specific information-based delivery path is generated, or when a slice ID of a specific service type requiring a specific information-based delivery path setting is used, Based route is set to be lower than a specific value required for setting a specific information-based delivery path, or when the traffic usage amount is located in a specific area requiring a specific information-based delivery path setting, , Or when receiving a control event from the core network, it can be satisfied.

Specifically, the specific information may include a service code that defines at least one of a service type supported in a delivery path, address information of a device corresponding to a destination of a delivery path, service capacity information of the delivery path, and delay information have.

Specifically, the information inserting unit may insert request information for requesting deletion of a transmission path into the last uplink packet of the service flow transmitted by inserting the specific information.

According to an embodiment of the present invention, an operation method of a data transmission / reception apparatus includes: a confirmation step of confirming whether specific information defining a transmission path exists in a received uplink packet; A routing step of, when the specific information exists, generating a delivery path according to the specific information and setting the delivery path as a service flow path of the uplink packet; And a transmission step of transmitting, in the transmission path, an uplink packet which is divided into the service flow among the received uplink packets.

Specifically, the path setting step may include storing the service flow classification information of the uplink packet and the mapping information mapping the generated transmission path into a path table, and transmitting a transmission path generated according to the specific information to the uplink packet Of the service flow path.

Specifically, in the transmitting step, an uplink packet in the case where specific information among the received uplink packets exists but fails to generate a delivery path according to the specific information, or service flow classification information in the received uplink packet, It is possible to transmit the uplink packet when it does not exist in the table to the default data network.

According to an embodiment of the present invention, there is provided a method of operating a terminal apparatus, the method comprising: a classification step of classifying a service flow of an uplink packet to be transmitted; Inserting specific information defining a delivery path of a service flow into an uplink packet of a service flow according to the satisfying triggering condition among the separated service flows when the predefined triggering condition is satisfied; And transmitting the uplink packet to the data node.

Specifically, the information inserting step may insert the specific information into the first uplink packet of the service flow.

Specifically, the method further comprises the step of, in an information table composed of a plurality of specific information, retaining policy information for selecting specific information based on the triggering condition; The information inserting step may select and insert the specific information based on the information table and the policy information.

According to an embodiment of the present invention, a computer program is provided that includes the steps of: identifying a service flow of an uplink packet to be transmitted in combination with hardware; Inserting specific information defining a delivery path of a service flow into an uplink packet of a service flow according to the satisfying triggering condition among the separated service flows when the predefined triggering condition is satisfied; And transmitting the uplink packet.

According to embodiments of the present invention, it is possible to realize a new scheme (technique) in which a terminal can control delivery path steering for traffic.

As a result, according to the embodiments of the present invention, it is possible to solve the overhead problem, the problem of increased signaling between the SMF and the UPF, which is a concern in the existing 5G ULCL function, and effectively support the demand / performance of the service type supported by 5G .

FIG. 1 is an exemplary diagram illustrating an existing Uplink Classifier (ULCL) system of the present invention.

FIG. 2 is an exemplary diagram showing a ULCL function of a terminal subject proposed in the present invention; FIG.

3 is a block diagram illustrating a configuration of a terminal apparatus according to an embodiment of the present invention;

4 is a block diagram showing a configuration of a data transmitting / receiving apparatus according to an embodiment of the present invention;

FIG. 5 is an exemplary diagram illustrating the configuration of specific information inserted by a terminal according to an embodiment of the present invention; FIG.

FIG. 6 is an exemplary diagram showing a configuration of a definition table held in a data transmitting / receiving apparatus according to an embodiment of the present invention; FIG.

7 is an exemplary diagram showing an example in which the ULCL function of the terminal subject proposed in the present invention is realized;

FIG. 8 is a flowchart illustrating an operation method of a terminal according to an exemplary embodiment of the present invention; FIG.

9 is a flowchart illustrating an operation method of a data transmitting / receiving apparatus according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The present invention relates to a technology for controlling a delivery path of terminal data.

Particularly, the present invention considers the 5G communication system introduced in the future.

5G communication system is an advanced mobile broadband (EMBB) / massively machine type communications (MMTC) / ultra-reliable and large scale communication (MMLC) system, which accommodates as many terminals as possible based on limited radio resources. low latency communications, high reliability and low latency communications).

Referring to FIG. 1, the ULCL function of the current 5G will be briefly described as follows.

The ULCL function is a technique realized in the UPF of the User Plane, and is a technique of steering a terminal's traffic to a local network (e.g., a URLLC network, 10) at a nearby location.

Currently, the 5G ULCL function is based on that the Control Plane SMF informs each UPF by transmitting information such as the terminal identifier / destination IP address / Prefix of the traffic that the UPF should steer the delivery path to the local network.

Accordingly, each UPF transmits the corresponding uplink packet (traffic) among the received uplink packets to a local network (e.g., a URLLC network, a local area network, and the like) based on information (terminal identifier / destination IP address / 10).

Therefore, the 5G ULCL function currently has a problem of overhead to continuously manage a large amount of information such as a terminal identifier / destination IP address / Prefix to be delivered to each UPF from the viewpoint of SMF.

Also, the ULCL function of 5G currently has a problem of overhead to continuously manage information such as the transmitted terminal identifier / destination IP address / Prefix in view of the UPF.

Of course, the 5G ULCL function currently has a problem of increased signaling between the SMF and the UPF.

Specifically, the present invention proposes a terminal apparatus and a data transmitting / receiving apparatus capable of realizing a proposed new scheme (hereinafter referred to as ULCL of a terminal main body).

Hereinafter, a new scheme proposed by the present invention, that is, a ULCL function of the terminal main body will be briefly described with reference to FIG.

The terminal device 100 has a function (e.g., ULCL Agent) for realizing the ULCL of the terminal subject proposed by the present invention.

The data transmission / reception device 200 of the present invention refers to UPF of User Plane.

Therefore, in the present invention, the data transmitting and receiving apparatus 200, that is, the UPF 200 has a function (for example, ULCL Server) for realizing the ULCL of the terminal subject proposed by the present invention.

The ULCL agent of the terminal device 100 and the ULCL server of the data transmitting and receiving device 200 may be distributed or installed in the form of an application (or a program), or may be installed in the terminal device 100, Or may be hardware (e.g., Chip) in the form of being mounted on the device 200.

In the present invention, the terminal device 100 distinguishes the service flows of uplink packets to be transmitted based on the operation of the ULCL Agent.

Based on the operation of the ULCL Agent, the terminal device 100 inserts specific information defining the delivery path of the service flow into the uplink packet of the target service flow to which the terminal-subject ULCL function is to be applied.

Then, the terminal device 100 transmits the uplink packet to the data node, that is, the data transmission / reception device 200 (UPF) of its own.

In the present invention, based on the operation of the ULCL server, the data transmitting / receiving device (200, UPF) checks whether specific information defining a transmission path exists in an uplink packet when receiving an uplink packet from the terminal device (100).

If the specific information exists in the uplink packet from the terminal device 100 based on the operation of the ULCL Server, the data transmission / reception device 200 (UPF) URLLC network, 10), or a third DN (e.g., internal network_UPF, 20), and sets the generated delivery path to the service flow path of this uplink packet.

Based on the operation of the ULCL Server, the data transmission / reception device (UPF) 200 transmits the uplink packet, which is divided into the service flows that generated the delivery path according to the specific information, among the received uplink packets, And can be transmitted to the

local network

10 or 20 according to a path (transmission path).

Of course, in the case of downlink packets received from the

local network

10 or 20 based on the operation of the ULCL server, the data transmission / reception device 200 (UPF) may transmit the downlink packet to the terminal device 100 based on the service flow path Lt; / RTI >

2, the ULCL function of the terminal device proposed in the present invention is a function that the terminal device 100 transmits a delivery path based on specific information set between the terminal device 100 and the data transmitting / receiving device 200 (UPF) When the specific information to be defined is determined (selected), the data transmission / reception device 200 (UPF) can generate a delivery route according to specific information and steer traffic (uplink / downlink packet) to the local network 10.

Therefore, according to the ULCL function of the terminal subject proposed in the present invention, it is possible to independently steer a delivery path for its own traffic based on specific information from the terminal viewpoint, and to provide information (terminal identifier / Destination IP address / Prefix, etc.).

Hereinafter, the configurations of the terminal apparatus and the data transmission / reception apparatus according to the embodiment of the present invention will be described in more detail.

For convenience of explanation, the description will be made using the reference numerals shown in Fig.

3, the configuration of a terminal device according to an embodiment of the present invention will be described.

3, the terminal apparatus 100 according to an embodiment of the present invention includes a classifying unit 110, an information inserting unit 120, and a transmitting unit 130. [

Furthermore, the terminal device 100 according to an embodiment of the present invention may further include a policy storage unit 140. [

Here, some or all of the division unit 110, the information insertion unit 120, the transmission unit 130, and the policy storage unit 140 may be implemented as a ULCL Agent for realizing the ULCL of the terminal subject proposed in the present invention .

The classifying unit 110 classifies the service flows of uplink packets to be transmitted.

Specifically, when an uplink packet to be transmitted from the terminal apparatus 100 is generated, the division unit 110 divides the information included in the packet header, for example, 5-tuple (Source IP, Destination IP, Source Port, Destination Port, Protocol ID).

Of course, in the present invention, in addition to 5-tuple (packet flow information), the division unit 110 may include application information such as a content header (HTTP / 2, FTP, QUIC Protocol), video / audio information, MPEG-DASH, WebRTC, RSTP).

Hereinafter, an example in which service flows are classified based on 5-tuple (packet flow information) will be described as an embodiment.

The information inserting unit 120 may be configured to specify a delivery path of the service flow in the uplink packet of the service flow according to the presently satisfying triggering condition among the service flows classified by the classifying unit 110 when the predefined triggering condition is satisfied Insert information.

That is, the information inserting unit 120 activates the ULCL function of the terminal subject when the predefined triggering condition is satisfied, and transmits to the uplink packet of the service flow according to the present satisfying triggering condition specific information for defining the delivery path of the service flow Can be inserted.

Here, the triggering condition may be used when a specific service flow requiring a specific information-based delivery path establishment is generated, or when a slice ID of a specific service type requiring a specific information-based delivery path setting is used, If this specific information-based delivery path setting is lowered below a certain value required, or if a specific information-based delivery path is located in a particular area where a route setting is required, or if the traffic usage amount exceeds a certain value requiring delivery path establishment , Or when receiving a control event from the core network, it can be defined as being satisfied.

For example, the information inserting unit 120 can determine that the triggering condition is satisfied when a specific service flow requiring the delivery path setting is generated in the terminal device 100. [

In this case, the information inserting unit 120 may insert the specific information defining the delivery path of the service flow into the uplink packet of the specific service flow, based on the currently satisfied triggering condition and the policy information to be described later.

As another example, when the slice ID (eMBB, mMTC, URLLC, etc.) of a specific service type for which a delivery path setting is required is used in the terminal apparatus 100, the information inserting unit 120 may determine that the triggering condition is satisfied .

In this case, the information inserting unit 120 inserts the uplink packet of the service flow according to the slice ID (for example, eMBB, mMTC, URLLC, etc.) of the specific service type on the basis of the present satisfying triggering condition and policy information Specific information defining the delivery path of the service flow can be inserted.

As another example, when the quality of the radio signal measured by the terminal device 100 is lowered to a specific value or less required to set a delivery path, the information inserting unit 120 can determine that the triggering condition is satisfied have.

In this case, the information inserting unit 120 inserts each service flow used in the terminal device 100 or some service flows (for example, a slice ID of a specific service type (for example, For example, eMBB, mMTC, URLLC, etc.) in the uplink packet.

As another example, the information inserting unit 120 can determine that the triggering condition is satisfied when the terminal device 100 is located in a specific area where the transmission path setting is required.

As another example, when the traffic usage amount of the terminal device 100 exceeds a specific value requiring a delivery path setting, or when receiving a control event from the core network, the information inserting unit 120 is satisfied Can be defined.

As another example, when receiving a control event from a core network, for example, 5G N / W (e.g., AMF, 3rd Party MEC Server, or Mgmt Server), the information inserter 120 determines that the triggering condition is satisfied can do.

On the other hand, the information inserting unit 120 may insert specific information into one uplink packet among the uplink packets of the service flow, insert specific information into a plurality of uplink packets, 100 and the data transmission / reception device 200 (UPF).

The information inserting unit 120 may insert specific information into the first uplink packet of the service flow when inserting specific information into one of the uplink packets of the service flow, It is possible to insert specific information into the Nth uplink packet set between the terminal apparatus 100 and the data transmission / reception apparatus 200 (UPF).

Hereinafter, as an embodiment, an embodiment for inserting specific information into a first uplink packet of a service flow will be described.

In this case, the information inserting unit 120 inserts the specific information defining the delivery path of the service flow into the first uplink packet of the uplink packet for the service flow according to the present triggering condition, Packets and no specific information thereafter.

On the other hand, the information inserting unit 120 determines (selects) the specific information defining the delivery path of the service flow based on the previously stored information table and policy information, and inserts it into the uplink packet.

Hereinafter, the process of selecting specific information will be described in detail.

More specifically, in the terminal device 100 of the present invention, policy information for selecting specific information based on satisfactory triggering conditions may be held in an information table composed of a plurality of specific information.

For example, the policy storage unit 140 may store / retain policy information for selecting specific information based on an information table composed of a plurality of specific information and a triggering condition.

The information table and the policy information stored / held in the policy storage unit 140 may be received from the core network, i.e., 5G N / W (e.g., AMF, 3rd Party MEC Server, or Mgmt Server) It can be updated to the latest through the method of requesting / receiving 5G N / W, such as the start time of operation of terminal device 100 (specifically, ULCL Agent), satisfaction of triggering condition, periodic time,

Here, the information table composed of a plurality of specific information includes at least one of service type (eMBB, mMTC, URLLC, etc.) of the delivery route, address information of the device corresponding to the destination of the delivery route, service capacity information of the delivery route, , Or an information table including a plurality of service codes.

Here, the policy information means a policy defined to determine which particular information (service code) is to be inserted into a certain service flow, taking into account the currently satisfied triggering condition among a plurality of specific information in the information table.

When the triggering condition is satisfied, the information inserting unit 120 inserts a target service flow to which the UE-based ULCL function is to be applied based on the currently satisfied triggering condition and policy information among the service flows classified by the classifying unit 110 For example, the service flow of the service type URLLC), and selects specific information (service code) to be inserted in the target service flow (for example, the service flow of the service type URLLC) in the information table.

Then, the information inserting unit 120 may insert specific information (service code) into the first uplink packet of the target service flow (for example, the service flow of the service type URLLC) after the selection time.

Therefore, if the service flow is not the target service flow (for example, the service flow of the service type URLLC) to which the terminal-based ULCL function is applied, among the service flows classified by the division unit 110, the information inserting unit 120 selects And will not insert it.

Here, the field into which the specific information is inserted in the uplink packet may be a field of a position set between the terminal device 100 and the data transmission / reception device 200 (UPF).

For example, the specific information may be inserted into the packet header of the uplink packet, for example, the Option field of the IP header, inserted into the Option field of the TCP header, or inserted into the payload field.

At this time, the specific information includes at least one of a service type (slice ID) supported in a delivery path, address information of a device corresponding to a destination of a delivery path (hereinafter, destination address information), service capacity information of the delivery path, Quot; service "

That is, the specific information is preferably information in a form of a small size in units of bits.

According to the first embodiment, the specific information can be defined as one service code that defines a service type (slice ID), destination address information, service capacity information of a delivery path, and delay information.

In this case, referring to FIG. 5, the specific information (a) inserted in the uplink packet will be one service code (ULCL Code).

In this case, the service type (e.g., eMBB, mMTC, URLLC, etc.) of the delivery path to be generated according to the corresponding service code, destination address information (IP / Port) , The service capacity information of the delivery path and the delay information are predefined (definition table described later).

According to the second embodiment, the specific information can be defined as a service code that defines destination address information, service capacity information of a delivery path, and delay information by a service type (slice ID) and a service type (slice ID).

In this case, referring to FIG. 5, the specific information (b) inserted in the uplink packet will include Slice ID and ULCL Code.

In this case, the data transmission / reception device 200 (UPF) preferably defines the destination address information (IP / Port), the service capacity information of the delivery path and the delay information for each service type (slice ID) (Definition table described later).

That is, in the case of the second embodiment, there is an advantage that the size of the definition table to be held in the data transmission / reception device 200 (UPF) can be reduced compared to the first embodiment.

According to the third embodiment, the specific information is a service code that defines service capacity information and delay information of a delivery path by a service type (slice ID), service type (slice ID), destination address information (IP / Port) Can be defined.

In this case, referring to FIG. 5, the specific information (c) inserted into the uplink packet will include the Slice ID, the ULCL Code, and the destination address information (IP / Port).

In this case, it is preferable that the data transmission / reception device 200 (UPF) has predefined service capacity information and delay information of the delivery path for each service type (slice ID) and service code combination (definition table described later).

In this case, the data transmission / reception device 200 (UPF) can use the destination address information (IP / Port) in the specific information when generating the delivery route.

That is, in the case of the third embodiment, there is an advantage that the size of the definition table to be held in the data transmission / reception device 200 (UPF) can be reduced compared to the first and second embodiments.

The transmitting unit 130 transmits the uplink packet to the data node, that is, the data transmitting / receiving device 200 (UPF) of the terminal device 100.

In this case, the data transmitting / receiving device 200 (UPF) checks whether specific information (for example, a service code) defining the delivery path exists in the uplink packet when receiving the uplink packet from the terminal device 100, A route to the local network (e.g., the URLLC network 10) may be generated according to the service code, and the generated delivery path may be set as the service flow path of the uplink packet.

Furthermore, the information inserting unit 120 inserts specific information into at least one uplink packet (e.g., the first uplink packet) and transmits the request information requesting deletion of the delivery path to the last uplink packet of the transmitted service flow Can be inserted.

Here, the request information is also information in the form of a service code composed of a small size in units of bits, and the field into which the request information is inserted in the uplink packet is also transmitted to the terminal device 100 and the data transmitting / receiving device 200 , UPF).

In this case, when the uplink packet inserted with the service code for requesting deletion of the forwarding path is received at the time of receiving the uplink packet from the terminal device 100, the data transmitting / receiving device 200 (UPF) It is possible to delete the transmission path to the local network (e.g., URLLC network 10) set as the service flow path of the link packet.

Hereinafter, a configuration of a data transmission / reception apparatus according to a preferred embodiment of the present invention will be described with reference to FIG.

4, the data transmitting and receiving apparatus 200 according to an exemplary embodiment of the present invention, that is, the UPF 200 includes an identifying unit 210, a path setting unit 220, and a transmitting unit 230 .

Furthermore, the UPF 200 of the present invention may further include a local interlocking unit 240.

Here, some or all of the identifying unit 210, the path setting unit 220, the transmitting unit 230, and the local linking unit 240 may be implemented as a ULCL Server for realizing the ULCL of the terminal subject proposed in the present invention .

The confirmation unit 210 determines whether specific information for defining a transmission path exists in the uplink packet when the uplink packet is received.

Hereinafter, for convenience of explanation, a case where an uplink packet is received from the terminal device 100 will be described.

The confirmation unit 210 can check whether specific information (e.g., service code) defining a delivery path exists in the uplink packet every time an uplink packet is received from the terminal device 100. [

When the terminal device 100 inserts specific information (e.g., a service code) into the first uplink packet of the service flow subject to the application of the terminal subject ULCL proposed by the present invention and transmits the same, the confirmation section 210 confirms that the terminal device 100 (E.g., service code) in the uplink packet of the service flow to which the UTRAN is subject to ULCL.

When the confirmation unit 210 confirms the presence of specific information (e.g., service code), the path setting unit 220 generates a delivery path based on the identified specific information (e.g., service code) As a service flow path.

More specifically, the local interworking unit 240 is a functional unit that interworks with at least one local network, and supports at least one transmission path generation that uses a device in each local network as a destination.

In other words, the UPF 200 of the present invention is configured to transmit a local network (e.g., a second DN 10 (e.g., URLLC network) and a third DN 20 (e.g., : Internal network _UPF), and the local interworking unit 240 provides this connection relationship.

At this time, the UPF 200 (especially the local interworking unit 240) is interworked with the N6 I / F defined by the 5G service interface based on the second DN 10 (e.g., the URLLC network) Example: Internal network _UPF) can be interworked with N9 I / F defined on the basis of 5G service interface.

In the path setting unit 220, the service type (e.g., eMBB, mMTC, URLLC, etc.) of the delivery path to be generated according to the specific information, the address information of the device corresponding to the destination of the delivery path, The service capacity information of the delivery path, and the definition table in which the delay information is predefined, may be held / stored.

The definition table of the path setting unit 220 can be received from the core network, that is, 5G N / W (e.g. AMF, 3rd Party MEC Server, Mgmt Server) May be updated at the same time when the information table and the policy information are updated.

At this time, the form of the definition table can be classified into the following embodiments.

According to the first embodiment, the specific information is defined by a single service code. The definition table includes service type (e.g., eMBB, mMTC, URLLC, etc.) of a delivery path to be generated according to the service code, (IP / Port), service capacity information of the delivery path, and delay information may be predefined information.

6, the UPF 200 includes a service type (Slice ID such as eMBB, mMTC, URLLC, etc.) of a delivery path to be generated according to the service code for each service code (ULCL Code) A definition table in which destination address information (IP / Port), service capacity information of a delivery path, and delay information are predefined can be held.

According to another embodiment of the present invention, the specific information is defined by a service type (slice ID) and a service code. The definition table includes, for each service type (slice ID) and service code combination, destination address information (IP / Port) The service capacity information and the delay information of the mobile station may be predefined information.

According to another embodiment of the present invention, the specific information is defined by a service type (slice ID), a service code and destination address information (IP / Port), and the definition table includes a service type (slice ID) The service capacity information and the delay information of the mobile station may be predefined information.

The route setting unit 220 sets the information indicated by the identified specific information (e.g., service code) when the confirmation unit 210 confirms the presence of specific information (e.g., service code) in this uplink packet (Eg URLLC), address information (eg 172.16.XXX.YYY) corresponding to the destination device (eg local server for URLLC service), service capacity information of the delivery path (eg 1Gb / s), and delay information (eg, 0.1 ms) from the definition table.

If the path setting unit 220 can generate the delivery path according to the information confirmed from the definition table within the support range of the local linking unit 240, It is possible to generate a transmission path to the local network 10 in accordance with the route.

The route setting unit 220 stores the mapping information obtained by mapping the service flow classification information (e.g., 5-tuple) of the current uplink packet and the newly generated transmission route in the route table, For example, a service code) can be set as the service flow path of this uplink packet.

On the other hand, when the route setting unit 220 can not generate the delivery route corresponding to the information confirmed from the definition table within the support range of the local linking unit 240 as described above, Code) to the local network 10 fails to be generated.

The transmitting unit 230 transmits the uplink packet, which is divided into the service flow that generated the delivery path among the received uplink packets, to the corresponding delivery path.

That is, the transmitter 230 identifies service flows based on the information included in the packet header, for example, 5-tuple (Source IP, Destination IP, Source Port, Destination Port, Protocol ID) .

Accordingly, the transmitting unit 230 checks whether the uplink packet service flow classification information (5-tuple) exists in the path table for each uplink packet.

When the service flow classification information 5-tuple of the uplink packet exists in the route table, the service flow path of this uplink packet is preliminarily set to the transmission path to the local network (e.g., the URLLC network 10) , And the uplink packet may or may not include specific information (e.g., a service code).

On the other hand, when the service flow classification information 5-tuple of the uplink packet does not exist in the route table, it may be the case that the transmission path creation fails or the application subject to the terminal subject ULCL proposed in the present invention is not applied.

The transmission unit 230 transmits the uplink packet when the service flow classification information 5-tuple among the received uplink packets exists in the route table to the local network (e.g., URLLC network, 10). &Lt; / RTI >

Meanwhile, the transmitting unit 230 transmits the uplink packet in the case where specific information (e.g., service code) of the received uplink packet exists but the route setting unit 220 fails to generate the delivery route, And can be transmitted to the first DN (e.g., the Internet).

In addition, the transmitting unit 230 transmits the uplink packet when the service flow classification information (5-tuple) in the received uplink packet does not exist in the route table, to the default data network, that is, ).

Of course, the data transmitting / receiving device 200 (UPF) transmits the traffic (uplink packet) to the

local network

10 or 20 in the delivery path according to the service code based on the operation of the ULCL Server, To the terminal device 100 based on the service flow path (delivery path) when the response traffic (downlink packet) is received.

Furthermore, when the reception of the uplink packet in which the request information requesting the transmission path deletion is inserted is confirmed, the path setting unit 220 can delete the transmission path set as the service flow path of the uplink packet.

For example, when receiving the uplink packet, the confirmation unit 210 can confirm not only the specific information defining the delivery path in the uplink packet but also the request information requesting deletion of the delivery path exists in the form of a service code.

In the embodiment where the terminal 100 inserts and transmits a service code for requesting deletion of a transmission path to the last uplink packet of a service flow subject to application of the terminal subject ULCL proposed by the present invention, The service code of the transmission path deletion request may be confirmed in the last uplink packet in which the service flow of the target of UCPL application to the terminal subject ULCL ends.

If the uplink packet (the last uplink packet of the service flow) in which the service code requesting deletion of the delivery path is inserted is confirmed by the confirmation unit 210, the path setting unit 220 sets up the uplink Deletes the delivery path set to the service flow path of the packet.

More specifically, the path setting unit 220 deletes the transmission path set as the service flow path of the uplink packet, and deletes the mapping information previously stored in the path table.

In addition to this, the path setting unit 220 determines whether or not a packet transmission / reception occurs such that a predetermined path maintenance time elapses from a set time of a previously generated path, or a predetermined threshold time elapses, It is also possible to delete the transmission path corresponding to the reception of the control event from the core network.

As described above, the ULCL function of the terminal subject proposed by the present invention is based on the specific information (e.g., service code) set up between the terminal device 100 and the data transmission / reception device 200 (UPF) (E.g., a service code) defining a delivery path is inserted into a determination (selection) and an uplink packet and transmitted, the data transmission / reception device 200 (UPF) Create routes and steer traffic to the local network.

That is, the ULCL of the terminal subject proposed by the present invention can steer the delivery path for its own traffic (uplink / downlink packet) on the basis of specific information (for example, service code) from the viewpoint of the terminal.

In addition, since the ULCL of the terminal subject proposed by the present invention does not depend on information (terminal identifier / destination IP address / Prefix, etc.) provided from the SMF in terms of the UPF, the terminal identifier / destination The overhead of maintaining large amounts of information such as IP address / Prefix, the situation where UPF depends on SMF to wait for necessary information (or command), information such as terminal identifier / destination IP address / Prefix to which UPF is delivered Overheads that need to be managed continuously, increased signaling between the SMF and the UPF, effectively addressing the concerns of existing 5G ULCL functionality.

Therefore, according to the present invention, the concern of the conventional 5G ULCL function can be solved by realizing a new technology that can control the propagation path steering for the own traffic from the viewpoint of the terminal, that is, the ULCL of the terminal subject, The effect of efficiently supporting the request / performance of the supporting URLLC service is derived.

Hereinafter, an example in which the ULCL function of the terminal subject proposed in the present invention is realized will be described with reference to FIG.

As shown in FIG. 7, the terminal device 100 can transmit / receive User Plane traffic to a default data network, i.e., a first DN (e.g., the Internet) through the UPF 200 (S10).

At this time, the terminal device 100 (ULCL Agent) of the present invention, when satisfying the predefined triggering condition (S20), transmits the terminal entity ULCL (5) to the core network 5G N / W (e.g. AMF, 3rd party MEC Server, (E.g., information table and policy information) (S30, S35), and store the information table and policy information (S40).

Accordingly, the terminal device 100 (ULCL Agent) of the present invention inserts specific information (e.g., a ULCL Code) defining a delivery path of a service flow in an uplink packet of a target service flow to which a terminal subject ULCL function is to be applied, (A second DN or a third DN, e.g., a URLLC network) according to specific information in the uplink packet (e.g., ULCL Code) User Plane traffic can be steered to the local network (S50).

The ULCL agent 100 of the present invention can provide information (e.g., an information table and a policy) for the UE-based ULCL function due to various status changes such as a new ULCL code being given to the core network or a new Slice ID being given. Information) update is required (S60), the information table and the policy information can be updated to the latest (S80) through the request and supply to the core network (S70, S75).

Hereinafter, an operation method of a terminal device according to an embodiment of the present invention will be described with reference to FIG. For convenience of explanation, reference will be made to the reference numerals shown in Fig.

As shown in FIG. 8, the terminal device 100 (ULCL Agent) of the present invention preferably stores an information table and policy information (S100).

The information table includes at least one of a service type (e.g., eMBB, mMTC, URLLC, etc.) of a delivery path, address information of a device corresponding to a destination of a delivery path, service capacity information of a delivery path, Information, that is, an information table including a plurality of service codes.

The policy information means a policy defined to determine which specific information (service code) is to be inserted into a certain service flow, taking into account the satisfying triggering condition among a plurality of specific information in the information table.

The terminal device 100 of the present invention can transmit the information included in the packet header, for example, 5-tuple (Source IP, Destination IP, Source Port, Destination Port, and Protocol ID) (S120).

At this time, the terminal device (100, ULCL Agent) of the present invention can classify the service type (eMBB, mMTC, URLLC, etc.) for the service flow of the uplink packet (S120).

Meanwhile, the terminal device 100 (ULCL Agent) of the present invention continuously judges whether or not the predefined triggering condition is satisfied (S125). Although FIG. 8 shows steps S 120 and S 125 after step S 120 for convenience of explanation, the terminal device 100 (ULCL Agent) of the present invention always performs step S 125 to continuously determine whether the triggering condition is satisfied .

When the triggering condition is satisfied (Yes in S125), the terminal device 100 (ULCL Agent) of the present invention determines, based on the currently satisfied triggering condition and the policy information, the target service flow to which the terminal- (For example, service code) to be inserted into the target service flow (for example, the service flow of the service type URLLC) from the information table and transmits specific information (for example, service code ) Can be inserted and then transmitted.

Hereinafter, as an embodiment, an embodiment for inserting specific information into one uplink packet of a target service flow will be described.

When the triggering condition is satisfied (Yes in S125), the terminal device 100 (ULCL Agent) of the present invention activates the ULCL function of the terminal subject, and based on the currently satisfied triggering condition and policy information, (For example, a service flow of the service type URLLC) and confirms that the ULCL function of the terminal subject is the first uplink packet of the target service flow (for example, the service flow of the service type URLLC) after the activation point of the ULCL function of the terminal subject (S130).

The terminal device 100 (ULCL Agent) of the present invention is a first uplink packet of a target service flow (for example, a service flow of a service type URLLC) (Yes in S130) (For example, a service code) to be inserted into the uplink packet (S140).

On the other hand, when the uplink packet of this terminal 100 (ULCL Agent) is not the first uplink packet of the target service flow after activating the ULCL function of the terminal subject (S130 No), the terminal device 100 It is confirmed whether it is the last uplink packet of the service flow (S170).

If the terminal 100 (ULCL Agent) of the present invention is the last uplink packet of the service flow that generated the delivery route (Yes in S170), the terminal device 100 (ULCL Agent) may insert the request information requesting deletion of the delivery route, that is, the service code ).

The terminal device 100 of the present invention transmits the uplink packet to the data node, that is, the data transmission / reception device 200 (UPF) of the terminal device 100 (S150).

The terminal device 100 (ULCL Agent) of the present invention repeats the step S110 and subsequent steps unless the operation is turned off (S160 No), and determines whether specific information should be selected and inserted every time an uplink packet to be transmitted is generated Will continue to determine and insert.

Hereinafter, a method of operating the data transmission / reception device (UPF) according to an embodiment of the present invention will be described with reference to FIG.

The UPF 200 of the present invention checks whether a ULCL code exists in an uplink packet when receiving an uplink packet (S200) (S210).

If the service code exists (Yes in S210), the UPF 200 of the present invention is a service code that defines a delivery path in the uplink packet (Yes in S215) (Eg URLLC), address information (eg 172.16.XXX.YYY) corresponding to the destination device (eg local server for URLLC service), service capacity information of the delivery path (eg 1Gb / s) and delay information (e.g., 0.1 ms) from the definition table, and determines whether a delivery path according to the thus confirmed information can be generated within the support range of the local interworking unit 240 (S220).

The UPF 200 of the present invention can be generated within the support range of the local interworking unit 240 (S220 Yes) A transmission path may be generated and the uplink packet may be transmitted to the corresponding transmission path (S230).

The UPF 200 according to the present invention stores the mapping information in which the service flow classification information (e.g., 5-tuple) of this uplink packet and the currently generated transmission route are mapped to the route table, The transmission path generated according to the service code can be set as the service flow path of the uplink packet (S240).

If the ULCL server 200 fails to generate a delivery path according to a service code (S220 No), the ULCL server 200 can not generate the uplink packet within the supported range of the local interworking unit 240, (E.g., the Internet) (S280).

On the other hand, if the service code does not exist in the received uplink packet (S210 No), the UPF 200 of the present invention determines whether the service flow classification information 5-tuple of the uplink packet exists in the route table (S260).

Accordingly, if the uplink packet service flow classification information 5-tuple exists in the route table (Yes in S260), the UPF 200 of the present invention transmits the uplink packet to the local network For example, a URLLC network, 10 (S270).

On the other hand, when the service flow classification information 5-tuple of the uplink packet does not exist in the route table (S260 No), the UPF 200 of the present invention transmits the uplink packet to the default data network : Internet) (S280).

On the other hand, if the service code exists (Yes in S210), the UPF (200, ULCL Server) of the present invention determines whether the service code is a service code requesting deletion of a delivery path (No in S215) The transmission path set as the service flow path of the uplink packet is deleted according to the code, and the mapping information pre-stored in the route table can also be deleted (S290).

In addition, the UPF (200, ULCL Server) according to the present invention transmits packet transmission / reception in accordance with a predefined policy so that a preset path maintenance time elapses from a set time of a previously generated path, It would also be possible to delete the propagation path that did not occur.

The UPF 200 of the present invention repeats the step S200 and subsequent steps until the operation is turned off (S250 No), so that each time an uplink packet is received, specific information confirmation and delivery path generation, uplink packet transmission Lt; / RTI >

As described above, according to the embodiment of the present invention, it is possible to solve a concern in the existing 5G ULCL function by realizing ULCL of a new technology that can control the propagation path steering for own traffic from a terminal perspective And the effect of efficiently supporting the requirements / performance of the URLLC service supported by 5G.

As described above, the method of operating the terminal device according to the embodiment of the present invention and the method of operating the data transmission / reception device can be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium . The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

A confirmation unit for confirming whether specific information defining a transmission path exists in the received uplink packet;

A path setting unit configured to generate a transmission path based on the specific information and to set the transmission path as a service flow path of the uplink packet when the specific information exists; And

And a transmitter for transmitting an uplink packet, which is divided into the service flows, among the received uplink packets, through the transmission path.
The method according to claim 1,

Further comprising: a local interlocking unit interlocked with at least one local network, the local interlocking unit supporting at least one transmission path generation with a device in each local network as a destination;

Wherein the path setting unit comprises:

And generates a transmission path in accordance with the specific information within a range supported by the local interlocking unit.
The method according to claim 1,

Wherein the path setting unit comprises:

Storing the service flow classification information of the uplink packet and the mapping information mapping the generated transmission path in a route table and setting a delivery path generated according to the specific information as a service flow path of the uplink packet To the data transmission / reception device.
3. The method of claim 2,

Wherein the transmission unit comprises:

And transmits the uplink packet in the case where specific information among the received uplink packets exists but the path setting unit fails to generate the transmission path according to the specific information, to the default data network.
The method of claim 3,

Wherein the transmission unit comprises:

And transmits the uplink packet when the service flow classification information of the received uplink packet does not exist in the path table to the default data network.
The method according to claim 1,

Wherein the path setting unit comprises:

And deletes the transmission path set as the service flow path of the uplink packet when the reception of the uplink packet into which the request information requesting deletion of the transmission path is inserted is confirmed.
A classifying unit for classifying a service flow of an uplink packet to be transmitted;

An information inserter for inserting specific information defining a delivery path of a service flow into an uplink packet of a service flow according to the satisfied triggering condition among the separated service flows when the predefined triggering condition is satisfied; And

And a transmitter for transmitting the uplink packet to the data node.
8. The method of claim 7,

Wherein the information inserting unit comprises:

And inserts the specific information into the first uplink packet of the service flow.
8. The method of claim 7,

In an information table composed of a plurality of specific information, policy information for selecting specific information based on the triggering condition is pre-stored;

Wherein the information insertion unit selects and inserts the specific information based on the information table and the policy information.
8. The method of claim 7,

The triggering condition includes:

When a specific service flow requiring a specific information-based delivery path is generated, or when a slice ID of a specific service type requiring a specific information-based delivery path is used, or when the quality of a radio signal is transmitted When the route setting is lower than a specific value required, or when the traffic usage amount exceeds a specific value requiring a delivery route setting, or when the traffic usage amount exceeds a specific value requiring a delivery route setting, When the control event is received from the terminal device.
8. The method of claim 7,

The specific information is,

And a service code that defines at least one of a service type supported by the delivery path, address information of a device corresponding to a destination of the delivery path, service capacity information of the delivery path, and delay information.
8. The method of claim 7,

Wherein the information inserting unit comprises:

And inserts the request information for requesting deletion of the transmission path into the last uplink packet of the service flow transmitted by inserting the specific information.
A confirming step of confirming whether specific information defining a delivery path exists in the received uplink packet;

A routing step of, when the specific information exists, generating a delivery path according to the specific information and setting the delivery path as a service flow path of the uplink packet; And

And a transmitting step of transmitting, in the transmission path, an uplink packet, which is divided into the service flows, among the received uplink packets.
14. The method of claim 13,

The path setting step may include:

Storing the service flow classification information of the uplink packet and the mapping information mapping the generated transmission path in a route table and setting a delivery path generated according to the specific information as a service flow path of the uplink packet To the data transmission / reception device.
14. The method of claim 13,

Wherein,

An uplink packet in the case where specific information among the received uplink packets exists but fails to generate a delivery path according to the specific information or an uplink packet in which uplink packet information among received uplink packets does not exist in the path table Link packet,

And transmitting the data to the data network.
A classifying step of classifying a service flow of an uplink packet to be transmitted;

Inserting specific information defining a delivery path of a service flow into an uplink packet of a service flow according to the satisfying triggering condition among the separated service flows when the predefined triggering condition is satisfied; And

And a transmitting step of transmitting the uplink packet in the data path.
17. The method of claim 16,

In the information inserting step,

And inserting the specific information into a first uplink packet of a service flow for each service flow.
17. The method of claim 16,

Further comprising the step of, in an information table composed of a plurality of specific information, retaining policy information for selecting specific information based on the triggering condition;

Wherein the information inserting step selects and inserts the specific information based on the information table and the policy information.
17. The method of claim 16,

The specific information is,

And a service code that defines at least one of a service type supported by the delivery path, address information of a device corresponding to a destination of the delivery path, service capacity information of the delivery path, and delay information. .
Identifying a service flow of an uplink packet to be transmitted in combination with hardware;

Inserting specific information defining a delivery path of a service flow into an uplink packet of a service flow according to the satisfying triggering condition among the separated service flows when the predefined triggering condition is satisfied; And

A computer program stored on a medium for executing the step of transmitting an uplink packet.