KR101891324B1 - Method and apparatus for providing diameter message service in mobile communication system, inter working function for diameter message service - Google Patents

Abstract

In the conventional LTE interworking function (IWF) operating in the mobile communication network, the LTE / EPC network only provides a function of linking the authentication interval of the existing UMTS network. Accordingly, in view of the rapidly increasing number of subscribers in recent years, there is a need for a technology that can provide a more efficient service to the subscriber and provide a flexible network operating environment. In the embodiment of the present invention, various protocol interfaces, for example, Gxx (for example, GXO), and the like are used in the EPC network by utilizing an LTE network interworking device for converting the protocol between the MME, the HSS, and the MME-HSS in the LTE / EPC network including the EUTRAN. , A Diameter message in a mobile communication system capable of service (transferring and processing) a necessary diamond message for interfacing with Rx, Gx, and the like, and implementing the detailed functions necessary for the interface to operate as a diamond message processing gateway Service.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for providing a diamond message service in a mobile communication system and a network interworking apparatus for a diamond message service,

The present invention relates to a mobile communication service, and more particularly, to a Mobile Management Entity (MME) and a Home Subscriber Server (HSS) in an LTE (Long Term Evolution) / EPC (Evolved Packet Core) network including an Evolved Universal Terrestrial Radio Access Network ), And interworking functions (IWF), which are responsible for protocol translation between MME and HSS, and various protocol interfaces such as Gxx, Rx, and Gx in the EPC network. A method and an apparatus for a diamond message service in a mobile communication system adapted to service (transfer and process) a diamond message necessary for interworking and to implement detailed functions necessary for a corresponding interface to operate as a diamond message processing gateway, To a network interworking device for message service.

A 3rd Generation Partnership Project (3GPP) mobile communication system based on WCDMA (Wideband Code Division Multiple Access) radio access technology is widely deployed all over the world. HSDPA (High Speed Downlink Packet Access), which can be defined as the first evolutionary phase of WCDMA, provides 3GPP mobile communication system with highly competitive wireless access technology in the mid-term future.

However, as the requirements and expectations of users and operators continue to increase and competition for developing wireless access technologies continues, development of new technologies in the 3GPP mobile communication system is required for future competitiveness. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simple structure and open interfaces, and proper power consumption of terminals are becoming a requirement. In addition, prevention of unnecessary latency at the network node and efficient use of network resources can also promote the technology evolution in 3GPP.

In 3GPP Release 8, a network architecture called EPC is described as one of mobile communication systems for meeting the above-mentioned requirements. EPC is a set of network nodes for 3GPP LTE (Long Term Evolution) system. The EPC supports the Evolved UMTS Terrestrial Radio Access Network (EUTRAN), which is an evolved RAN, by evolving the core network of the existing 3GPP system architecture. In addition, in order to increase the efficiency of the packet network, And has a simplified and efficient network structure. A wireless communication system including EPC and EUTRAN is called an evolved packet system (EPS).

The EPC network is divided into three logical entities such as PDN-GW (Packet Data Network Gateway), Serving-GW (Serving Gateway) and MME (Mobility Management Entity).

First, in the user plane, the PDN-GW is a gateway to an external network and a global mobility anchor for mobility between 3GPP access technology and non-3GPP access technology (CDMA2000, WiMAX or WIFI) (Session Control) interworking with an external Internet network and a non-3GPP network and a Serving-GW and external network and routing information for a packet service as a user plane, and performs tunneling and IP Routing function.

Next, as another user plane entity, the Serving-GW is a mobility anchor for mobility between 3GPP accesses (E-UTRAN, UTRAN, GERAN). Serving-GW interworks with eNodeB and S1-U interface as session control and user plane node that handles payload traffic according to the established session and supports Inter LTE / 3GPP handoff .

Next, the MME is a control plane entity responsible for mobility management of UEs moving between different EUTRAN eNodeBs and also for session management.

Meanwhile, in the LTE / EPC network, an LTE IWF linking an LTE / EPC network with an authentication interval of an existing UMTS network can be configured.

1 is a diagram illustrating an operation structure of a network interworking apparatus according to the prior art.

1, the LTE IWF 10 includes an LTE / EPC network including an MME 40, an eNode (eNodeB) 30 and a Serving-GW / PDN-GW 20, a WCDMA And provides an interworking function with the core node HSS 50, the AuC 60, the EIR 70, and the like. That is, the MME 40 and the HSS 50, the AuC 60, and the EIR 70 are connected to each other through an inter-working agent (IWA) Thereby making it possible to interwork with each other.

As described above, the conventional inter-working function (IWF) operating in the mobile communication network provides only the function of linking the LTE / EPC network with the authentication interval of the existing UMTS network. Accordingly, in view of the rapidly increasing number of subscribers in recent years, there is a need for a technology that can provide a more efficient service to the subscriber and provide a flexible network operating environment.

In the embodiment of the present invention, various protocol interfaces, for example, Gxx (for example, GXO), and the like are used in the EPC network by utilizing an LTE network interworking device for converting the protocol between the MME, the HSS, and the MME-HSS in the LTE / EPC network including the EUTRAN. , A Diameter message in a mobile communication system capable of service (transferring and processing) a necessary diamond message for interfacing with Rx, Gx, and the like, and implementing the detailed functions necessary for the interface to operate as a diamond message processing gateway Service.

Specifically, in the embodiment of the present invention, Gxx, Rx (Rx) configured when interworking between a Bearer Binding and Event Report Function (BBERF), an AF (Application Function), a PCEF (Policy Control and Enforcement Function) , Gx, and so on.

A method of providing a Diameter message service in a mobile communication system according to an embodiment of the present invention is a method of providing a Diameter message service of a Inter-Working Function having a proxy gateway function, Transmitting a Diameter Request message to a Policy & Charging Rule Function (PCRF) selected by a routing policy when a Diameter Request message is received from a Diameter Router Agency (DRA) client in a data network gateway; Generating a context for the message; transmitting a DIAMETER RESPONSE message to the DRA client when the DIAMETER RESPONSE message is received from the PCRF; and deleting the created context. have.

The method includes the steps of inquiring whether DRA binding information exists in the database, generating binding information when the DRA binding information does not exist in the database and storing the DRA binding information in the DB, And matching the information with the corresponding binding and storing the matching information in the database.

The method may further include, when the binding information for session addition is generated, transmitting the request message to the PCRF of the bound information when DRA binding information exists in the database.

In addition, the method may further include, upon receiving a sub-sequential request message from the DRA client when the session is changed by the DRA client, inquiring whether there is DRA binding information in the database, And transmitting the request message to the PCRF.

The method further includes the steps of inquiring whether the session information for the DRA client exists in the DB when the DIAMETER PCRF initiation request message is received from the PCRF when the session is changed by the PCRF, Transmitting the DIAMETER RESPONSE message to the PCRF that has received the message by the context stored in the database when the DIAMETER RESPONSE message is received from the DRA client; And deleting the generated context.

In addition, the method may further include, when receiving a termination-sequent request message from the DRA client, inquiring whether there is DRA binding information in the database, and transmitting the DIAMETER end request message to the PCRF of the bound information And generating a context for the received DIAMETER END REQUEST message; and receiving a DIAMETER RESPONSE message from the PCRF when the DIAMETER RESPONSE message is received by the DRA client that has received the message by the context stored in the database. And deleting the created context and deleting session information for the session from the database.

The method further includes transmitting the Diameter End Request message to the PCRF of the DRA-bound information to be inquired if the Diameter End Request message is received from the DRA Client, Generating a context for the received Diameter end request message; transmitting a message to the DRA client that received the message by the context stored in the database, when the Diameter response message is received from the PCRF; Deleting the generated context and deleting session information for the session from the database, and deleting information about the binding when all the session information is deleted.

In a method of providing a DIAMETER message service of a network interworking apparatus having a redirect gateway function according to an embodiment of the present invention, when a DIAMETER creation request message is received from a DRA client in a packet data network gateway, Selecting a PCRF, inquiring whether there is DRA binding information in the database, and storing new binding information in the database when DRA information does not exist in the database; And transmitting the received DIAMETER RESPONSE message to the PCRF upon receiving a DIAMETER RESPONSE message including PCRF information.

The method may further include the steps of: inquiring DRA binding information in the database when the DIAMETER creation request message is received from the DRA client, and transmitting a DIAMETER RESPONSE message including PCRF information to the DRA client; And transmitting the DIAMETER RESPONSE message received from the network interworking device to the PCRF by the DRA client.

In addition, the method may further include transmitting a Diameter End Request message to the PCRF when the DRA Client provides a termination-sequent request message to the network interworking device, Transmitting a DIAMETER RESPONSE message including the DIAMETER RESPONSE message to the DRA client and deleting the session information of the currently stored gateway from the database; and receiving the DIAMETER RESPONSE RESPONSE message from the PCRF .

In addition, the method may further include the steps of transmitting, by the DRA client, the Diameter End Request message to the PCRF when the Diameter End Request message is provided from the DRA Client to the Network Interleaver, Sending a response message to the DRA client and deleting session information of the currently stored gateway from the database; and receiving the DIAMETER END RESPONSE message from the PCRF.

A diagrammatic message service device in a mobile communication system according to an embodiment of the present invention includes a DRA client and includes a packet data network gateway (PDN-GW) for performing session control in cooperation with a packet data network and a non-3GPP network, , A network interworking device for providing a gateway function for transferring and processing a diagram message required for protocol interface interworking in an EPC (Evolved Packet Core) network, a communication policy and a billing process from the network interworking device, And a Policy and Charging Rule Function for requesting a message or delivering a response message to the network interworking device.

The network interworking apparatus for a DIAMETER message service according to an exemplary embodiment of the present invention includes means for delivering a DIAMETER message for protocol interface interworking in an EPC network to a DRA client and an accounting policy rule processing apparatus, Means for generating a context for DRA binding, and database for storing DRA binding creation information and gateway session information.

Here, the network interworking device may provide a protocol interface configured when interworking between a BBERF (Bearer Binding and Event Report Function), an AF (Application Function), a PCEF (Policy Control Enforcement Function) .

In addition, the network interworking device may provide a routing function for delivering a message received from the DRA client to the charging policy rule processing device for an IP-CAN (Internet Protocol Connectivity Access Network) session.

In addition, the network interworking device may provide a message converting function to operate as a proxy gateway function and a redirect gateway function, respectively.

According to the present invention, it is possible to provide a diemeter which performs transmission and processing of a DIAMETER message necessary for interworking protocol interfaces such as Gxx, Rx, and Gx in the EPC network by utilizing an LTE network interworking device for MME-HSS protocol conversion. A message processing gateway function can be provided. In other words, according to the increase of subscribers, DRA (Diameter Router Agent) mode is flexibly operated in the LTE network interworking device to ensure operational convenience, and profile information such as service policy and quality of service (QoS) It can be used as a gateway for exchange.

1 is a diagram illustrating an operation structure of a network interworking apparatus according to the prior art,
FIG. 2 is an exemplary network configuration of a mobile communication system applicable to an embodiment of the present invention; FIG.
3 is a block diagram of a diagrammatic message service apparatus having an Inter-Working Function (IWF) according to an embodiment of the present invention.
4 is a flowchart illustrating a process of generating initial binding information in a proxy gateway function of an IWF in a mobile communication system according to an embodiment of the present invention.
FIG. 5 is a flowchart illustrating a method of generating a binding information for adding a session in a proxy gateway function of the IWF, according to an embodiment of the present invention,
FIG. 6 is a diagram illustrating a process of changing a session by a DRA (Diameter Router Agent) client in a proxy gateway function of an IWF, according to an embodiment of the present invention.
FIG. 7 is a flowchart illustrating a procedure for changing a session by PCRF (Policy and Charging Rule Function) in the proxy gateway function of the IWF, according to an embodiment of the present invention.
FIG. 8 is a flowchart illustrating a process for terminating a session for deleting a DRA session in the proxy gateway function of the IWF, according to an embodiment of the present invention,
FIG. 9 is a flowchart illustrating a procedure for terminating a session for deleting binding information in a proxy gateway function of an IWF, according to an embodiment of the present invention,
FIG. 10 is a flowchart illustrating a process of generating an initial binding information in a redirect gateway function of an IWF in a mobile communication system according to an embodiment of the present invention. FIG.
FIG. 11 is a flowchart illustrating a method of generating a binding information for adding a session in a redirect gateway function of the IWF, according to an embodiment of the present invention,
FIG. 12 is a flowchart illustrating a procedure for terminating a session for deleting a DRA session in the redirect gateway function of the IWF, according to an embodiment of the present invention,
FIG. 13 is a flowchart illustrating a procedure for terminating a session for deleting binding information in the redirect gateway function of the IWF, according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the present invention be limited only by the terms of the appended claims. Like numbers refer to like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the embodiments of the present invention, which may vary depending on the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

Prior to the description of the embodiments, the present invention utilizes an LTE interworking function (hereinafter referred to as IWF) that handles protocol conversion between the MME, the HSS, and the MME-HSS in an LTE / EPC network including an EUTRAN (Forwarding and processing) necessary for interfacing various protocol interfaces such as Gxx, Rx, Gx, etc. in the EPC network, and in order to operate as a DIAMETER message processing gateway, The present invention is intended to implement a DIAMETER message service in a mobile communication system capable of realizing the functions of the present invention.

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

FIG. 2 is a diagram illustrating a network configuration of a mobile communication system applicable to an embodiment of the present invention. The mobile communication system includes a UE 100, an eNode B 102, a Mobile Management Entity (MME) 106, An SGS (Serving Gateway) 110, a PGW 112, an NB 104, a SGSN (Serving GPRS) Support Node 108, an Authentication Center An Equipment Identity Register (EIR) 116, an LTE IWF 120, a Home Location Register (HLR) / Home Subscriber Server (HSS) 118, a PDS (Packet Data Network) And the like.

As shown in FIG. 2, the UE 100 may include various types of terminal devices such as a smart phone, a notepad, a tablet computer, and the like as a subscriber terminal device have.

The UE 100 may provide a broadband communication service to a subscriber through a broadband connection through a paging and authentication procedure with an eNB 102 or an NB 104, which will be described later, and may provide a broadband communication service to a subscriber using a WCDMA- A broadband communication service including a communication environment supporting LTE / EPC or mobile WIMAX (Mobile World Interoperability for Microwave Access) and an IP (Internet Protocol) based communication environment such as the Internet can be provided .

The PDN 1 may include, for example, the Internet as a packet data network. Herein, the Internet is an Internet protocol (IP) protocol, and various services existing in the upper layer of the TCP / IP protocol, such as HTTP (HyperText Transfer Protocol), Telnet, FTP, DNS, , Simple Network Management Protocol (SNMP), Network File Service (NFS), and Network Information Service (NIS).

The HLR / HSS 118 may be collectively referred to as a subscriber server as a home location register and a home subscriber server, and is a network node including a database including subscriber information on a wireless communication system, And location-related data.

The eNB 102 is an EUTRAN access type base station equipment and can perform functions such as RF transmission and transmission and reception, signal strength and quality measurement, baseband signal processing, and channel card resource management.

The NB 104 is a base station equipment of the UTRAN access method and can perform functions such as RF transmission and transmission and reception, signal strength and quality measurement, baseband signal processing, and channel card resource management.

The MME 106 is an EUTRAN access type mobile communication switching center for signal control between the eNB 102 and a SGW 110 to be described later and determines where to route the data received from the UE 100 And is responsible for the subscriber information and the mobility management, session management, idle subscriber management, paging, and subscriber authentication functions of the UE 100. The MME 106 transmits a Modify Bearer Request (MBR) message to the SGW 110 according to the location information of the UE 100 and transmits a Modify Bearer Answer (MBE) ) Message, the UE 100 may provide communication services through the modified bearer.

The SGSN 108 is a UTRAN-access mobile switching center that determines where to route the incoming data from the UE 100 and controls the mobility management of the subscriber information and the UE 100, session management, Paging, and subscriber authentication functions.

The SGW 110 is a serving gateway device that manages the mobility of the UE 100 between the eNB 102 and the second eNB, the 3GPP network, and the EUTRAN. The SGW 110 manages the mobility of the UE 100 between the eNB 102 and the second eNB, Control functions can be performed. Also, the SGW 110 interworks with the eNB 102, supports handover between the LTE network and the LTE network / 3GPP, and can set up the PGW 112 and the EPS bearer. The MME 106 transmits PDU (Packet Data Unit) using tunneling, and transmits the MBR message delivered from the MME 106 to the PGW 112.

The PGW 112 is a packet data network gateway device that allocates the IP of the UE 100 and performs session control in cooperation with the PDN 1 and the Non-3GPP network. The SGW 110 and the PDN 1 ) And routing information, and can perform tunneling and IP routing functions. In addition, the PGW 112 may be responsible for delivering PDUs to the SGW 110 and the PDN (1).

The LTE IWF 120 interworks with the MME 106 of the LTE core network and the authentication section such as the HSS (HLR) 118, the AuC 114, and the EIR 116 of the UTRAN access method, To perform subscriber information management, and subscriber-specific policy management for roaming services. The LTE IWF 120 will be described in detail with reference to FIG.

The AuC 114 is a subscriber authentication unit that stores authentication key related information stored in a USIM or a SIM card, and can perform authentication and encryption using an authentication algorithm. That is, when the calculation is performed using the authentication key and the authentication algorithm in the USIM or the SIM card, and the calculation result is the same as the calculation result of the AuC 114, the subscriber is authenticated. The AuC 114 may be connected to the HSS (HLR) 118 or may be configured on the same platform.

The EIR 116 is a terminal authentication unit for storing an International Mobile Equipment Identity (IMEI) of a mobile terminal. If the IMEI of a mobile terminal is found to be lost or stolen, the mobile terminal can not access the network . At this time, the AuC 114 and the EIR 116 may be configured as independent platforms or the same platform.

3 is a block diagram of a diagrammatic message service apparatus having an Inter-Working Function (hereinafter referred to as IWF) according to an embodiment of the present invention. The UE 100, the SGW 110, the PGW 112 ), HSS 118, IWF 120, Policy & Charging Rule Function (PCRF) 130, PDN 1, and the like.

Hereinafter, a diagrammatic message service apparatus according to an embodiment of the present invention will be described in detail while referring to the mobile communication system of FIG. 2 described above in parallel.

The UE 100 may include various types of terminal devices such as a smart phone, a note pad, and a tablet computer as a subscriber terminal device. The UE 100 may access a 3GPP network or a Non-3GPP network to provide a broadband communication service to a subscriber.

The SGW 110 is a serving gateway device that manages the mobility of the UE 100 between the eNB 102 and the second eNB, the 3GPP network, and the EUTRAN. The SGW 110 manages the mobility of the UE 100 between the eNB 102 and the second eNB, Control functions can be performed. Also, the SGW 110 interworks with the eNB 102, supports handover between the LTE network and the LTE network / 3GPP, and can set up the PGW 112 and the EPS bearer. The MME 106 may transmit a PDU (Packet Data Unit) using tunneling and transmit the MBR message transferred from the MME 106 to the PGW 112.

The PGW 112 is a packet data network gateway device that allocates the IP of the UE 100 and performs session control in cooperation with the PDN 1 and the Non-3GPP network. The SGW 110 and the PDN 1 ) And routing information, and can perform tunneling and IP routing functions. In addition, the PGW 112 may be responsible for delivering PDUs to the SGW 110 and the PDN (1). In the PGW 112, a DRA (Diameter Router Agency) client that can be applied to the embodiment of the present invention may be included.

The HSS 118 is a home subscriber server, which is a network node including a database including subscriber information for a wireless communication system, and can store profile information of the service subscriber, authentication and location related data, and the like.

The IWF 120 interworks with the MME 106 of the LTE core network and the authentication interval such as the HSS 118, the AuC 114, and the EIR 116 of the UTRAN access method, and performs interworking with the foreign mobile communication network, , Policy management for each subscriber for roaming service, and the like, and provides a service (delivery and processing) of a DIY message required for protocol interface interworking in an EPC network according to an embodiment of the present invention .

For this purpose, the IWF 120 may perform a gateway function (DRA function) for processing the DIAMETER message, and may provide detailed functions required for the protocol interface.

Specifically, the IWF 120 includes Gxx, which is configured when interworking between BBERF (Bearer Binding and Event Report Function), AF (Application Function), PCEF (Policy Control and Enforcement Function) Rx, Gx, and so on.

The IWF 120 also manages a plurality of DRA clients (for example, an Internet Protocol Connectivity Access Network) for an IP-CAN (Internet Protocol Connectivity Access Network) session created to exchange a service policy / QoS profile between the PCEF and the PCRF 130, The PCEF in the PGW 112) to a particular PCRF.

In addition, the IWF 120 can provide a message conversion function to operate as a proxy gateway function (proxy DRA function) and a redirect gateway function (redirect DRA function), respectively.

The specific operation and function of the IWF 120 will be described in more detail in the flowcharts of FIGS. 4 to 13 described later.

The PCRF 130 is a charging policy rule processing device and can provide a dynamic QoS and a charging rule according to a service data flow to perform a communication policy and a charging process in a communication network . The PCRF 130 may request a DIAMETER message from the IWF 120 or transmit a response message to the IWF 120 according to an embodiment of the present invention.

The PDN 1 may include, for example, the Internet as a packet data network. Here, the Internet may refer to a worldwide open computer network structure providing various services existing in the TCP / IP protocol and its upper layers such as HTTP, Telnet, FTP, DNS, SMTP, SNMP, NFS and NIS.

Hereinafter, the present invention will be described in detail with reference to the flow charts of FIGS. 4 to 13, which together with the above-described configuration are accompanied by a diagrammatic message service method in a mobile communication system according to an embodiment of the present invention.

4 is a flowchart illustrating an initial binding (binding) information generation process in a proxy gateway function of an IWF, according to an embodiment of the present invention.

When requesting a DIAMETER message for the first time, since there is no binding information, binding information is generated. For each DRA client session, each DRAIN client session can be stored for each IP-CAN session bound or stored for each UE.

In this case, it is possible to bind to a DB (DataBase) in the IWF 120 and store session information for each of the gateways.

When a response error message is received from the PCRF, the corresponding binding information and session information can be deleted from the DB.

4, when a DIAMETER REQUEST message is received from the DRA client 112 (S100), the IWF 120 transmits a Diameter Request message to the PCRF selected by the DRA routing policy, e.g., PCRF1 130/1 (S106).

At this time, the IWF 120 generates a context for the received message (S102) and inquires whether there is DRA binding information. If the DRA binding information does not exist, new binding information can be stored, and the session information for the DRA client 112 can be matched to the corresponding binding and stored in the DB (S104).

Thereafter, the IWF 120 may transmit the DIAMETER RESPONSE message to the corresponding DRA client 112 that has received the message based on the stored context (S 108) when receiving the DIAMETER RESPONSE message from the PCRF 1 130/1 (S 110) ).

Then, the IWF 120 can delete the created context (S112).

5 is a flowchart illustrating a method of generating a binding message for adding a session in a proxy gateway function of an IWF, according to an embodiment of the present invention.

5, when a DIAMETER REQUEST message is received from the DRA client 112, the IWF 120 inquires whether there is DRA binding information in the DB, and then transmits a PCRF of the bound information, for example, PCRF1 130/1 (S206). ≪ / RTI >

At this time, the IWF 120 generates a context for the received message (S202), and can match the session information for the DRA client 112 with the corresponding binding and store it in the DB (S204).

Thereafter, the IWF 120 may send a DIAMETER RESPONSE message to the corresponding DRA client 112 that received the message by context stored in the DB when receiving a DIAMETER RESPONSE message from PCRF1 130/1 (S108) (S210).

Then, the IWF 120 can delete the generated context (S212).

FIG. 6 is a flowchart illustrating a process of changing a session by the DRA client in the proxy gateway function of the IWF, according to an embodiment of the present invention.

6 corresponds only to the proxy mode 2, and in the DRA client operating in the proxy mode 1, the DIAMETER message can be directly transmitted without going through the IWF 120. [

6, when a diamond sub-sequent request message is received from the DRA client 112 (S300), the IWF 120 inquires whether DRA binding information exists in the DB S304), and transmit the DIAMETER REQUEST message to the PCRF of the bound information, e.g., PCRF1 130/1 (S306).

At this time, the IWF 120 may generate a context for the received message (S302).

Thereafter, when the DIAMETER RESPONSE message is received from the PCRF1 130/1 (S308), the IWF 120 transmits a message to the corresponding DRA client 112 receiving the message by the stored context (S310).

Then, the IWF 120 can delete the generated context (S312).

FIG. 7 is a flowchart illustrating a process of changing a session using a PCRF in the proxy gateway function of the IWF, according to an embodiment of the present invention.

In the embodiment of FIG. 7, when a message is received from the PCRF, the DRA client inquires the session information of the DRA client and delivers the message to the corresponding DRA client.

7, when the DIY PCRF initiation request message is received from the PCRF1 130/1 (S400), the IWF 120 determines whether the session information for the DRA client 112 exists in the DB (S404), and may transmit the DIAMETER REQUEST message to the DRA client 112 of the searched session (S406).

At this time, the IWF 120 may generate a context for the received message (S402).

Thereafter, when the DIAMETER RESPONSE message is received from the DRA client 112 (S408), the IWF 120 transmits a DIAMETER RESPONSE message to the corresponding PCRF, that is, the PCRF1 130/1 that received the message by the context stored in the DB (S410).

Then, the IWF 120 can delete the generated context (S412).

FIG. 8 is a flowchart illustrating a procedure for terminating a session for deleting a DRA session in the proxy gateway function of the IWF, according to an embodiment of the present invention.

In the embodiment of FIG. 8, when a session termination request is received from the DRA client, the gateway session information for the corresponding DRA client is deleted.

8, when a termination-sequent request message is received from the DRA client 112 (S500), the IWF 120 inquires whether there is DRA binding information in the DB (S504) (Step S506). In step S506, the terminal transmits a request for terminating the DIY to the PCRF1 130/1.

At this time, the IWF 120 may generate a context for the received message (S502).

Thereafter, when the DIAMETER RESPONSE message is received from the PCRF1 130/1 (S508), the IWF 120 may transmit the DIAMETER RESPONSE message to the corresponding DRA client 112 receiving the message by the context stored in the DB (S510).

Then, the IWF 120 deletes the generated context (S512) and deletes the session information for the session from the DB (S514).

9 is a flowchart illustrating a procedure for terminating a session for deleting binding information in the proxy gateway function of the IWF, according to an embodiment of the present invention.

In the embodiment of FIG. 9, when a session termination request is received from the DRA client, the gateway session information for the corresponding DRA client is deleted.

9, when a termination-sequence request message is received from the DRA client 112 (S600), the IWF 120 inquires whether DRA binding information exists in the DB (S604) The Diameter Exit Request message may be sent to the PCRF of the DRA-bound information to be queried, e.g., PCRF1 130/1 (S606).

At this time, the IWF 120 may generate a context for the received message (S602).

Thereafter, when the DIAMETER response message is received from the PCRF1 130/1 (S608), the IWF 120 may transmit the message to the corresponding DRA client 112 receiving the message by the context stored in the DB (S610) .

Then, the IWF 120 deletes the generated context (S612), and can delete the session information for the session from the DB. At this time, if all the session information is deleted, the information about the binding can be deleted (S614).

10 is a flowchart illustrating a process of generating the initial binding information in the redirect gateway function of the IWF, according to an embodiment of the present invention.

In the case of the initial request, the embodiment of FIG. 10 generates binding information because there is no binding information, and when the response is received in error, the binding information and session information are deleted from the DB.

As shown in FIG. 10, when the DIY generation request message is received from the DRA client 112 (S700), the IWF 120 may select the PCRF according to the DRA routing policy.

At this time, the IWF 120 inquires whether there is DRA binding information in the DB, and if there is no DRA information in the DB, the IWF 120 may store new binding information in the DB (S702).

Then, the DRA client 112 receives the DIAMETER RESPONSE message including the PCRF information from the IWF 120 (S704), and may directly transmit the DIAMETER RESPONSE message to the PCRF1 130/1 (S706) .

FIG. 11 is a flowchart illustrating a method of generating a binding information for adding a session in the redirect gateway function of the IWF, according to an embodiment of the present invention.

In the case of the initial request, the embodiment of FIG. 11 generates binding information because there is no binding information, and when the response is received in error, the binding information and session information are deleted from the DB.

11, when the DIAMETER creation request message is received from the DRA client 112 (S800), the IWF 120 inquires DRA binding information in the DB (S802) A response message may be transmitted to the DRA client 112 (S804).

Thereafter, the DRA client 112 can directly transmit the DIAMETER RESPONSE message including the PCRF information received from the IWF 120 to the PCRF1 130/1 (S806).

12 is a flowchart illustrating a procedure for terminating a session for deleting a DRA session in the redirect gateway function of the IWF, according to an embodiment of the present invention.

In the embodiment of FIG. 12, when a session termination request is received from the DRA client, the gateway session information for the corresponding DRA client is deleted.

12, when the DRA client 112 provides the termination-sequent request message to the IWF 120 (S900), the DRA client 112 transmits a DIAMETER end request message to the PCRF1 130/1) (S902).

Thereafter, the IWF 120 may transmit a DIAMETER RESPONSE message including the PCRF information to the DRA client 112 (S904), and may delete the session information of the currently stored gateway from the DB (S906).

Then, the DRA client 112 can receive the Diameter end response message from the PCRF1 130/1 (S908).

FIG. 13 is a flowchart illustrating a procedure for terminating a session for deleting binding information in a redirect gateway function of the IWF, according to an embodiment of the present invention.

In the embodiment of FIG. 13, when a session end request is received from the DRA client, the gateway session information for the corresponding DRA client is deleted, and when all sessions are deleted, the binding information is deleted.

13, when the DRA client 112 provides the termination-sequent request message to the IWF 120 (S1000), the DRA client 112 transmits the DIY-END request message to the PCRF1 (FIG. 13) 130/1) (S1002).

Then, the IWF 120 may transmit a DIAMETER RESPONSE message including the PCRF information to the DRA client 112 (S1004), and may delete the session information of the currently stored gateway from the DB (S1006). At this time, if the session of the corresponding IP-CAN session or all the DRA clients of the UE is deleted, the binding information can be deleted.

Then, the DRA client 112 can receive the diamond end response message from the PCRF1 130/1 (S1008).

As described above, the present invention utilizes various protocol interfaces in the EPC network, for example, Gxx (eg, GXO), and the like, using an LTE network interworking device that handles protocol conversion between MME, HSS, and MME-HSS in an LTE / EPC network including EUTRAN. , A Diameter message in a mobile communication system capable of service (transferring and processing) a necessary diamond message for interfacing with Rx, Gx, and the like, and implementing the detailed functions required for the interface to operate as a diamond message processing gateway Service. Specifically, in the embodiment of the present invention, Gxx, Rx (Bearer Binding and Event Report Function), AF (Application Function), PCEF (Policy Control and Enforcement Function) , Gx, and so on.

The mobile communication system according to the present invention utilizes an LTE network interworking device for MME-HSS protocol conversion to transmit and process a DIY message required for interworking protocol interfaces such as Gxx, Rx, and Gx in the EPC network The Diameter Router Agent (DRA) mode can be flexibly operated in the LTE network interworking device according to the increase in the number of subscribers, and it is possible to secure the operational convenience, and the PCEF, AF, and PCRF It is expected to be used as a gateway device for exchanging profile information such as service quality and quality of service (QoS) for each subscriber.

100: UE 110: SGW 112: PGW
118: HSS 120: IWF 130: PCRF

Claims (8)

A method of providing a Diameter message service of an Inter-Working Function (IWF)
Generating a context for a Diameter Request message received from a Diameter Router Agency (DRA) in a packet data network gateway;
The network interworking device operates as a proxy gateway and transmits the DIAMETER REQUEST message to a Pooling & Charging Rule Function (PCRF) selected by a DRA routing policy.
Transmitting a DIAMETER RESPONSE message to the DIAMETER routing agent when the DIAMETER RESPONSE message is received from the charging policy rule processing device;
Deleting the context;
Selecting a billing policy rule processing apparatus selected by a routing policy as the network interworking apparatus operates as a redirect gateway when receiving a DIY generation request message from the DIAMETER routing agent; And
Inquiring whether there is DRA binding information in the database, and if there is no DRA binding information in the database, generating new DRA binding information and storing the new DRA binding information in the database
Method of service of a diamond message in a mobile communication system. The method according to claim 1,
Before generating the context, and before transmitting the diagram request message to the charging policy rule processing device,
And storing the gateway session information for the DIAMETER routing agent in the database by matching the DRA binding information with the DRA binding information
Method of service of a diamond message in a mobile communication system. The method according to claim 1,
The method comprises:
When creating the binding information for session addition, transmitting the request message to the charging policy rule processing apparatus having the DRA binding information if the DRA binding information exists in the database
Method of service of a diamond message in a mobile communication system. The method according to claim 1,
The method comprises:
Checking whether the DRA binding information exists in the database when a DI-sub-sequent request message is received from the DI's routing agent when a session is changed by the DI's routing agent; And
Further comprising transmitting a Diameter request message to an accounting policy rule processing device having the DRA binding information to be queried
Method of service of a diamond message in a mobile communication system. The method according to claim 1,
The method comprises:
When the session is changed by the billing policy rule processing device, if a DIAMETER PCRF initialization request message is received from the billing policy rule processing device, inquiring whether session information about the DIAMETER routing agent exists in the database ;
Transmitting a Diameter request message to a Diameter routing agent of the queried session;
Transmitting the DIAMETER RESPONSE message to the charging policy rule processing apparatus that has received the message by the context stored in the database when the DIAMETER RESPONSE message is received from the DIAMETER routing agent; And
Further comprising deleting the context
Method of service of a diamond message in a mobile communication system. The method according to claim 1,
The method comprises:
If a termination-sequent request message is received from the DIAMETER routing agent, querying the database for the DRA binding information;
Transmitting the request for terminating the diagram to a charging policy rule processing apparatus having the DRA binding information to be inquired;
Generating a context for the received Diameter End Request message;
Transmitting the DIAMETER RESPONSE message to the DIAMETER routing agent that received the message by the context stored in the database when the DIAMETER RESPONSE message is received from the charging policy rule processing device; And
Further comprising deleting the context and deleting session information for the session from the database
Method of service of a diamond message in a mobile communication system. The method according to claim 1,
The method comprises:
Inquiring whether the DRA binding information exists in the database when the DIYMEMORY RETENTION REQUEST message is received from the DIM routing agent;
Transmitting the request for terminating the diagram to a charging policy rule processing apparatus having the DRA binding information to be inquired;
Generating a context for the received Diameter End Request message;
Transmitting a message from the billing policy rule processing device to the DI routing agent when the DI response message is received by the context stored in the database;
Deleting the context and deleting session information for the session from the database; And
Further comprising deleting DRA binding information in the database if all session information is deleted
Method of service of a diamond message in a mobile communication system. The method according to claim 1,
The new DRA binding information is generated and stored in the database,
And transmitting the received DIM response message to the billing policy processing apparatus when the DIM routing agent receives a DIM response message including PCRF information from the network interworking apparatus
Method of service of a diamond message in a mobile communication system.

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