KR20130051252A - Method and apparatus for providing diameter message service in mobile communication system, inter working function for diameter message service - Google Patents

Abstract

PURPOSE: A diameter message service method, a device, and a network connecting device for a diameter message service are provided to implement a detailed function which is necessary for an interface. CONSTITUTION: An IWF(Inter-Working Function)(120) receives a diameter request message from a DRA(Diameter Router Agency) within a packet data network gateway(S100). The IWF transmits the diameter request message to a PCRF(Policy and Charging Rule Function) by a routing policy(S106). The IWF generates context for the received diameter request message(S102). The IWF receives a diameter response message from the PCRF(S108). The IWF transmits the diameter response message to the DRA client(S110). The IWF deletes the generated context(S112). [Reference numerals] (112) DRA client; (S100,S106) Diameter request; (S102) Context generation; (S104) DRA binding generation, G/W session information storage; (S108,S110) Diameter response; (S112) Context deletion

Description

METHOD AND APPARATUS FOR PROVIDING DIAMETER MESSAGE SERVICE IN MOBILE COMMUNICATION SYSTEM, INTER WORKING FUNCTION FOR DIAMETER MESSAGE SERVICE}

The present invention relates to a mobile communication service, and in particular, a mobile management entity (MME) and a home subscriber server (HSS) in a Long Term Evolution (LTE) / Evolved Packet Core (EPC) network including an Evolved Universal Terrestrial Radio Access Network (EUTRAN). ) And various protocol interfaces in the EPC network, for example, Gxx, Rx, Gx, etc. by utilizing the LTE Inter-Working Function (IWF), which is responsible for protocol translation between MME-HSS. Method and apparatus for diameter message service in a mobile communication system suitable for implementing (delivering and processing) the necessary diameter message for interworking and implementing the detailed functions required for the corresponding interface to operate as the diameter message processing gateway A network interworking device for a message service.

3rd Generation Partnership Project (3GPP) mobile communication systems based on Wideband Code Division Multiple Access (WCDMA) radio access technology are widely deployed around 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 demands and expectations of users and operators continue to increase, and the development of competing wireless access technologies continues, new technological evolution in 3GPP mobile communication systems is required to be competitive in the future. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simple structure and open interface, and adequate power consumption of the terminal are demanding requirements. In addition, the prevention of unnecessary latency in the network node and the 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 the mobile communication systems for meeting the aforementioned requirements. EPC is a set of network nodes for 3GPP LTE (Long Term Evolution) system. EPC has evolved the core network of the existing 3GPP system architecture to support Evolved UMTS Terrestrial Radio Access Network (EUTRAN), which is an evolved RAN, and to improve the efficiency of packet networks. Efficient network structure is simplified. A wireless communication system including an EPC and an EUTRAN is called an evolved packet system (EPS).

The EPC network is divided into three logical entities: 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 global mobility anchor for mobility between 3GPP access technology and non-3GPP access technology (such as CDMA2000, WiMAX, or WIFI) and a gateway to an external network. Protocol is a session control and user plane that allocates protocols and interworks with external Internet networks and non-3GPP networks, maintains routing information with Serving-GW and external networks for packet services, and provides tunneling and IP Has routing function.

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

Next, the MME is a control plane entity that is responsible for mobility management of user equipment (UE) moving between different EUTRAN eNodeBs, and is also responsible for session management.

On the other hand, the LTE / EPC network as described above may be configured LTE IWF interworking the authentication interval of the LTE / EPC network and the existing UMTS network.

1 is a view showing an operation structure of a network interworking device according to the prior art.

Referring to FIG. 1, an LTE interworking device (LTE IWF) 10 includes an LTE / EPC network including an MME 40, an eNB (eNodeB) 30, and a Serving-GW / PDN-GW 20, and a WCDMA network. It provides the interworking function with the core node HSS (50), AuC (60) and EIR (70). That is, the MME 40, the HSS 50, the AuC 60, and the EIR 70 through an inter-working agent (hereinafter referred to as IWA) 12 which is a conversion agent that performs protocol conversion. Interworking is possible.

As described above, in the LTE interworking function (IWF) according to the prior art operating in the mobile communication network, only the function of interworking the authentication interval of the LTE / EPC network and the existing UMTS network is provided. Therefore, in view of the rapidly increasing number of subscribers in recent years, there is a need for a technical plan to provide a more efficient service and provide a flexible network operation environment to the subscriber.

Accordingly, in the embodiment of the present invention, in the LTE / EPC network including the EUTRAN, by using the LTE network interworking device that is responsible for protocol conversion between MME and HSS, and MME-HSS, various protocol interfaces in the EPC network, for example, Gxx Diameter messages in mobile communication systems that can service (deliver and process) the diameter messages necessary for interworking with Rx, Gx, etc., and implement the detailed functions required for the corresponding interface to operate as a diameter message processing gateway I would like to propose a service.

Specifically, in the embodiment of the present invention, Gxx, Rx configured when interworking between a Bearer Binding and Event Report Function (BBERF), an Application Function (AF), a Policy Control Enforcement Function (PCEF), and a Policy and Charging Rule Function (PCRF) To implement a protocol interface such as Gx.

According to an embodiment of the present invention, a diameter message service method in a mobile communication system may include a packet in a diameter message service method of an inter-working function having a proxy gateway function. When a diameter request message is received from a DRA (Diameter Router Agency) client in a data network gateway, transmitting a diameter request message to a policy & charging rule function (PCRF) selected by a routing policy, and receiving the received diameter request Generating a context for the message, transmitting a diameter response message to the DRA client when a diameter response message is received from the PCRF, and deleting the generated context. have.

The method may further include: querying whether DRA binding information exists in a database; generating and storing binding information in the database when the DRA binding information does not exist in the database; and a gateway session for a DRA client. The method may further include storing information in the database by matching the information with a corresponding binding.

The method may further include transmitting a diameter request message to the PCRF of the bound information when the DRA binding information exists in the database when generating the binding information for adding the session.

In addition, the method, when a session change by the DRA client, when a diameter sub-sequent request message is received from the DRA client, inquires whether the DRA binding information exists in the database, and then bound information The method may further include transmitting a diameter request message to the PCRF.

The method may further include: inquiring whether session information for the DRA client exists in a DB when a diameter PCRF initialized request message is received from the PCRF when the session is changed by the PCRF; Transmitting a diameter request message to a DRA client of the first step; and when a diameter response message is received from the DRA client, transmitting the diameter response message to a PCRF that receives the message by a context stored in the database; The method may further include deleting the generated context.

In addition, the method, if a termination-sequent request message is received from the DRA client, inquiring whether there is DRA binding information in the database, and transmitting the diameter termination request message to the PCRF of the bound information Generating a context for the received diameter end request message; and when a diameter response message is received from the PCRF, the diameter response message is transmitted to the DRA client that has received the message by the context stored in the database. The method may further include transmitting a message, deleting the generated context, and deleting session information about the corresponding session from the database.

The method may further include: when the diameter end request message is received from the DRA client, inquiring whether DRA binding information exists in the database, and transmitting the diameter end request message to the PCRF of the DRA bound information to be queried; Generating a context for the received diameter end request message; if a diameter response message is received from the PCRF, transmitting a message to the DRA client that has received the message by the context stored in the database; The method may further include deleting the generated context, deleting session information about a corresponding session from the database, and deleting information about a corresponding binding when all session information is deleted.

In the diameter message service method of a network interworking device having a redirect gateway function according to an embodiment of the present invention, when a diameter generation request message is received from a DRA client in a packet data network gateway, the diameter message is selected by a routing policy. Selecting a PCRF, querying whether DRA binding information exists in a database, storing new binding information in the database when the DRA information does not exist in the database, and the DRA client from the network interworking device. When receiving a diameter response message including PCRF information, the method may include transmitting the received diameter response message to the PCRF.

Here, when the diameter generation request message is received from the DRA client, querying the DRA binding information in the database, and transmitting a diameter response message including PCRF information to the DRA client, The DRA client may further include transmitting the diameter response message received from the network interworking device to the PCRF.

The method may further include: transmitting, by the DRA client, the diameter termination request message to the PCRF when a termination-sequent request message is provided from the DRA client to the network interworking device. Transmitting a diameter response message including a message to the DRA client, deleting session information of a currently stored gateway from the database, and receiving the diameter termination response message from the PCRF by the DRA client; Can be.

The method may further include: transmitting, by the DRA client, the diameter termination request message to the PCRF when a diameter termination request message is provided from the DRA client to the network interworking device; The method may further include transmitting a response message to the DRA client, deleting session information of a currently stored gateway from the database, and receiving the diameter end response message from the PCRF by the DRA client.

In an exemplary embodiment of the present invention, a diameter message service apparatus in a mobile communication system includes a packet data network gateway (PDN-GW) including a DRA client and performing session control in association with a packet data network and a non-3GPP network. And a network interworking device that provides a gateway function for delivering and processing a diameter message required for protocol interface interworking in an Evolved Packet Core (EPC) network, and performs a communication policy and a billing process. It may include a billing policy rule processing device (Policy and Charging Rule Function) for receiving a message request or deliver a response message to the network interworking device.

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

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

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

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

According to the present invention, using the LTE network interworking device that is responsible for protocol conversion between MME-HSS using the LTE network interworking device to perform the delivery and processing of the diameter message necessary for interworking protocol interface such as Gxx, Rx, Gx It can provide a message processing gateway function. In other words, according to the increase in subscribers, the LTE network interworking device flexibly operates the DRA (Diameter Router Agent) mode to secure operational convenience, and provides profile information such as service policy and quality of service (QoS) for each subscriber between PCEF, AF and PCRF. It can be used as a gateway to exchange.

1 is a view showing an operation structure of a network interworking device according to the prior art;
2 is an exemplary network configuration of a mobile communication system that can be applied to an embodiment of the present invention;
3 is a block diagram illustrating a diameter message service device having an interworking device (hereinafter referred to as IWF) according to an embodiment of the present invention;
4 is a flowchart illustrating a diameter message service method in a mobile communication system according to an embodiment of the present invention, illustrating an initial binding information generation process in a proxy gateway function of an IWF;
FIG. 5 is a flow diagram illustrating a process of generating binding information for adding a session in a proxy gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention; FIG.
6 is a flowchart illustrating a method of changing a session by a DRA (Diameter Router Agent) client in a proxy gateway function of an IWF in a diameter message service method in a mobile communication system according to an embodiment of the present invention;
7 is a flow diagram illustrating a process of changing a session by a policy and charging rule function (PCRF) in a proxy gateway function of an IWF as a method of diameter message service in a mobile communication system according to an embodiment of the present invention;
FIG. 8 is a flowchart illustrating a method of terminating a session for deleting a DRA session in a proxy gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention; FIG.
9 is a flow diagram illustrating a process of terminating a session for deleting binding information in a proxy gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention;
FIG. 10 is a flowchart illustrating a diameter message service method in a mobile communication system according to an embodiment of the present invention, illustrating an initial binding information generation process in a redirect gateway function of an IWF; FIG.
FIG. 11 is a flow diagram illustrating a process of generating binding information for adding a session in a redirect gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention; FIG.
12 is a flow diagram illustrating a process of terminating a session for deleting a DRA session in a redirect gateway function of an IWF in a diameter message service method in a mobile communication system according to an embodiment of the present invention;
FIG. 13 is a flowchart illustrating a process of terminating a session for deleting binding information in a redirect gateway function of an IWF in a diameter message service method in a mobile communication system according to an embodiment of the present invention; FIG.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail 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. In addition, terms to be described below are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to intention or custom of a user or an operator. Therefore, the definition should be based on the contents throughout this specification.

Prior to the description of the embodiment, the present invention utilizes an LTE network interworking device (Inter-Working Function, hereinafter referred to as IWF) in charge of protocol conversion between MME and HSS and MME-HSS in LTE / EPC network including EUTRAN. To service (deliver and process) the diameter messages required for interworking various protocol interfaces, such as Gxx, Rx, Gx, etc. within the EPC network, In order to implement a diameter message service in a mobile communication system that can implement a function, it is possible to easily achieve the object of the present invention from this technical idea.

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

2 is an exemplary network configuration of a mobile communication system that can be applied to an embodiment of the present invention, a user equipment (UE) 100, an eNode B (eNB) 102, a mobile management entity (MME) 106, Serving Gateway (SGW) 110, Packet Data Network Gateway (PGW) 112, NB (Node B) 104, Serving General Packet Radio Service (GPRS) Support Node (108), Authentication Center (AUC) (114), Equipment Identity Register (EIR) 116, LTE IWF (120), Home Location Register (HLR) / Home Subscriber Server (HSS) (118), Packet Data Network (PDN) (Internet) (1) And the like.

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

The UE 100 may provide a broadband communication service to a subscriber by interfacing to a broadband connection through a paging and authentication procedure with an eNB 102 or an NB 104 described below, and using WCDMA-based third generation or more generations. It is possible to provide a broadband communication service including both a communication environment supporting, for example, a communication environment such as LTE / EPC or mobile world interoperability for microwave access (WIMAX), and an Internet Protocol (IP) based communication environment such as the Internet. .

The PDN 1 is a packet data network and may include, for example, the Internet. Here, the Internet includes various services existing in the TCP / IP protocol and its upper layers, namely, HyperText Transfer Protocol (HTTP), Telnet, File Transfer Protocol (FTP), Domain Name System (DNS), and Simple Mail Transfer Protocol (SMTP). It can refer to a global open computer network architecture that provides 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, respectively, and is a network node including a database containing subscriber information for a wireless communication system. Location data and the like.

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

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

The MME 106 is an EUTRAN access mobile communication switching station that is in charge of signal control between the eNB 102 and the SGW 110 to be described later. The MME 106 determines where to route incoming data from the UE 100. In addition, it may play a role of managing subscriber information and mobility of the UE 100, session management, idle subscriber management, paging, and subscriber authentication. The MME 106 transmits a bearer modification request (MBR) message to the SGW 110 according to a change in the location information of the UE 100, thereby modifying a bearer response (MBA: Modify Bearer Answer (Request)). ) Message, the communication service may be provided to the UE 100 through the modified bearer.

The SGSN 108 is a UTRAN access mobile communication switching center that determines where to route incoming data from the UE 100, and manages subscriber information and mobility of the UE 100, session management, idle subscriber management, It can play the role of paging, subscriber authentication function, etc.

The SGW 110 is a serving gateway device that manages mobility of the UE 100 between the eNB 102 and the second eNB, between the 3GPP network and the EUTRAN, and processes a payload traffic according to an established session. Control functions can be performed. In addition, the SGW 110 may interwork with the eNB 102, support handover within the LTE network or between the LTE network / 3GPP, and configure the PGW 112 and the EPS bearer. In addition, the packet data unit (PDU) may be delivered using tunneling, and the MBR message transmitted from the MME 106 may be transmitted to the PGW 112.

The PGW 112 is a packet data network gateway device which allocates an IP of the UE 100 and performs session control in association with a PDN 1 and a Non-3GPP network, and the SGW 110 and PDN 1 for packet service. ) And routing information, and can perform tunneling and IP routing functions. In addition, the PGW 112 may serve to deliver the PDU to the SGW 110 and the PDN 1.

The LTE IWF 120 interoperates with the MME 106 of the LTE core network, authentication intervals such as HSS (HLR) 118, AuC 114, EIR 116, etc. of the UTRAN access method, and interworks with an overseas mobile communication network. It can perform subscriber information management, policy management for each subscriber for roaming service. The LTE IWF 120 will be described in detail with reference to FIG. 3.

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

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

FIG. 3 is a block diagram illustrating a diameter message service device having an inter-working function (hereinafter referred to as IWF) according to an embodiment of the present invention, and includes a UE 100, an SGW 110, and a PGW 112. ), The HSS 118, the IWF 120, the Policy & Charging Rule Function (PCRF) 130, the PDN 1, and the like.

Hereinafter, a diameter message service apparatus according to an exemplary embodiment of the present invention will be described in detail with reference to the above-described mobile communication system of FIG. 2.

The UE 100 is a subscriber terminal device and may include various types of terminal devices such as a smartphone, a notepad, a tablet computer, and the like. The UE 100 may provide a broadband communication service to a subscriber by accessing a 3GPP network or a Non-3GPP network.

The SGW 110 is a serving gateway device that manages mobility of the UE 100 between the eNB 102 and the second eNB, between the 3GPP network and the EUTRAN, and processes a payload traffic according to an established session. Control functions can be performed. In addition, the SGW 110 may interwork with the eNB 102, support handover within the LTE network or between the LTE network / 3GPP, and configure the PGW 112 and the EPS bearer. In addition, the packet data unit (PDU) may be delivered using tunneling and the MBR message transmitted from the MME 106 may be transmitted to the PGW 112.

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

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

The IWF 120 interoperates the authentication section with the MME 106 of the LTE core network, the HSS 118 of the UTRAN access method, the AuC 114, the EIR 116, and the like, and manages subscriber information by interworking with an overseas mobile communication network. , A network interworking device that can perform policy management for each subscriber for roaming service, etc., and provide a service (delivery and processing) of a diameter message necessary for interworking a protocol interface in an EPC network according to an embodiment of the present invention. Can be.

To this end, the IWF 120 may perform a gateway function (DRA function) for processing a diameter message, and may provide detailed functions required for a corresponding protocol interface.

Specifically, the IWF 120 includes a Gxx configured when interworking between a Bearer Binding and Event Report Function (BBERF), an Application Function (AF), a Policy Control Enforcement Function (PCEF), and a Policy and Charging Rule Function (PCRF) 130. Protocol interfaces such as Rx and Gx can be implemented.

In addition, the IWF 120 may include a plurality of DRA clients (eg, DRA clients) for Internet Protocol Connectivity Access Network (IP-CAN) sessions created to exchange subscriber-specific service policies / QoS profiles and the like between the PCEF and the PCRF 130. Routing function may be provided to deliver a message received at the PCEF) in the PGW 112 to a specific PCRF.

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

Detailed operations and functions of the IWF 120 will be described in more detail later with reference to the flowcharts of FIGS. 4 to 13.

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

The PDN 1 is a packet data network and may include, for example, the Internet. Here, the Internet may refer to a global open computer network structure that provides various services existing in the TCP / IP protocol and higher layers, that is, HTTP, Telnet, FTP, DNS, SMTP, SNMP, NFS, and NIS.

Hereinafter, the above-described configuration will be described in detail with reference to the flowcharts of FIGS. 4 to 13 attached to a diameter message service method in a mobile communication system according to an embodiment of the present invention.

First, FIG. 4 is a flowchart illustrating a process of generating initial binding (binding) information in a proxy gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention.

In the case of initially requesting a diameter message, binding information is generated because there is no binding information, and all DRA client sessions may be stored for each bound IP-CAN session or for each UE.

In this case, a session creation may be repeatedly requested. In this case, the session may be bound to a DB (DataBase) in the IWF 120 and stored in session information for each gateway.

If a response error message from the PCRF is received, the binding information and session information may be deleted from the DB.

As shown in FIG. 4, when a diameter request message is received from the DRA client 112 (S100), the IWF 120 sends a diameter request message to the PCRF selected by the DRA routing policy, for example, PCRF1 130/1. Can be transmitted (S106).

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

Thereafter, when the diameter response message is received from the PCRF1 130/1 (S108), the IWF 120 may transmit the diameter response message to the corresponding DRA client 112 that has received the message by the stored context (S110). ).

The IWF 120 may delete the generated context (S112).

5 is a flowchart illustrating a process of generating binding information for adding a session in a proxy gateway function of an IWF as a method of diameter message service in a mobile communication system according to an embodiment of the present invention.

As shown in FIG. 5, when a diameter request message is received from the DRA client 112, the IWF 120 inquires whether DRA binding information exists in the DB, and then checks the PCRF of the bound information, for example, PCRF1 130/1. In step S106, the diameter request message may be transmitted.

In this case, the IWF 120 may generate a context for the received message (S102), match the session information for the DRA client 112 with the corresponding binding, and store it in the DB (S104).

Then, when the IWF 120 receives the diameter response message from the PCRF1 130/1 (S108), the IWF 120 may transmit the diameter response message to the corresponding DRA client 112 that has received the message by the context stored in the DB. There is (S110).

The IWF 120 may delete the generated context (S112).

6 is a flowchart illustrating a process of changing a session by a DRA client in a proxy gateway function of an IWF as a method of diameter message service in a mobile communication system according to an embodiment of the present invention.

The embodiment of FIG. 6 corresponds to proxy mode 2 only, and a diameter message may be directly transmitted to the DRA client operating in proxy mode 1 without going through IWF 120.

As shown in FIG. 6, when a diameter 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), a diameter request message may be transmitted to the PCRF of the bound information, for example, PCRF1 130/1 (S306).

In this case, 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 the message to the corresponding DRA client 112 that has received the message by the stored context (S310).

In addition, the IWF 120 may delete the generated context (S312).

7 is a flowchart illustrating a process of changing a session by a PCRF in a proxy gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention.

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

As shown in FIG. 7, when a diameter PCRF initialized request message is received from the PCRF1 130/1 (S400), the IWF 120 determines whether session information for the DRA client 112 exists in the DB. Inquiry (S402), the diameter request message can be transmitted to the DRA client 112 of the inquired session (S406).

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

Then, when the diameter response message is received from the DRA client 112 (S408), the IWF 120 sends the diameter response message to the corresponding PCRF, that is, PCRF1 (130/1), which received the message by the context stored in the DB. It may transmit (S410).

The IWF 120 may delete the generated context (S412).

8 is a flowchart illustrating a method of terminating a session for deleting a DRA session in a proxy gateway function of an IWF as a method of diameter message service in a mobile communication system according to an embodiment of the present invention.

8 illustrates a case of deleting gateway session information for a corresponding DRA client when a session termination request is received from the DRA client.

As shown in FIG. 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). In step S506, a diameter termination request message may be transmitted to the PCRF of the received information, that is, the PCRF1 130/1.

In this case, 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 that has received the message by the context stored in the DB. (S510).

In addition, the IWF 120 may delete the generated context (S512) and delete session information about the corresponding session from the DB (S514).

9 is a flowchart illustrating a process of terminating a session for deleting binding information in a proxy gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention.

9 illustrates a case of deleting gateway session information for a corresponding DRA client when a session termination request is received from the DRA client.

As shown in FIG. 9, when a termination-sequent request message is received from the DRA client 112 (S600), the IWF 120 inquires whether DRA binding information exists in the DB (S604). In step S606, the diameter termination request message may be transmitted to the PCRF of the DRA-bound information to be inquired, for example, PCRF1 130/1.

In this case, 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 that has received the message by the context stored in the DB (S610). .

In addition, the IWF 120 may delete the generated context (S612) and delete session information about the corresponding session from the DB. In this case, when all session information is deleted, information on the corresponding binding may be deleted (S614).

FIG. 10 is a flowchart illustrating a method of generating initial binding information in a redirect gateway function of an IWF as a diameter message service method in a mobile communication system according to an exemplary embodiment of the present invention.

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

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

In this case, the IWF 120 may inquire whether DRA binding information exists in the DB, and if the DRA information does not exist in the DB, the IWF 120 may store new binding information in the DB (S702).

Thereafter, the DRA client 112 may receive a diameter response message including PCRF information from the IWF 120 (S704), and directly transmit the received diameter response message to the PCRF1 130/1 (S706). .

11 is a flowchart illustrating a process of generating binding information for adding a session in a redirect gateway function of an IWF as a method of diameter message service in a mobile communication system according to an embodiment of the present invention.

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

As shown in FIG. 11, when a diameter generation request message is received from the DRA client 112 (S800), the IWF 120 inquires DRA binding information in the DB (S802) and a diameter including PCRF information. The response message may be transmitted to the DRA client 112 (S804).

Thereafter, the DRA client 112 may directly transmit a diameter response message including the PCRF information received from the IWF 120 to the PCRF1 130/1 (S806).

12 is a flowchart illustrating a method of terminating a session for deleting a DRA session in a redirect gateway function of an IWF as a method of diameter message service in a mobile communication system according to an embodiment of the present invention.

12 illustrates a case of deleting gateway session information for a corresponding DRA client when a session termination request is received from the DRA client.

As shown in FIG. 12, when a termination-sequent request message is provided from the DRA client 112 to the IWF 120 (S900), the DRA client 112 sends the diameter termination 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 delete session information of the currently stored gateway from the DB (S906).

In addition, the DRA client 112 may receive a diameter end response message from the PCRF1 130/1 (S908).

13 is a flowchart illustrating a process of terminating a session for deleting binding information in a redirect gateway function of an IWF as a diameter message service method in a mobile communication system according to an embodiment of the present invention.

In the embodiment of FIG. 13, when a session termination 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.

As shown in FIG. 13, when a termination-sequent request message is provided from the DRA client 112 to the IWF 120 (S1000), the DRA client 112 transmits the diameter termination request message to the PCRF1 ( 130/1) (S1002).

Thereafter, the IWF 120 may transmit a diameter response message including the PCRF information to the DRA client 112 (S1004), and delete session information of the currently stored gateway from the DB (S1006). In this case, when the corresponding IP-CAN session or sessions of all DRA clients of the UE are deleted, binding information may be deleted.

In addition, the DRA client 112 may receive a diameter end response message from the PCRF1 130/1 (S1008).

As described above, the present invention utilizes an LTE network interworking device that is in charge of protocol conversion between MME and HSS and MME-HSS in an LTE / EPC network including EUTRAN, for example, various protocol interfaces in an EPC network, for example, Gxx. Diameter messages in mobile communication systems that can service (deliver and process) the diameter messages necessary for interworking with Rx, Gx, etc., and implement the detailed functions required for the corresponding interface to operate as a diameter message processing gateway Implement the service. Specifically, in the embodiment of the present invention, Gxx, Rx configured when interworking between a Bearer Binding and Event Report Function (BBERF), an Application Function (AF), a Policy Control Enforcement Function (PCEF), and a Policy and Charging Rule Function (PCRF) Implemented protocol interface such as, Gx.

A mobile communication system according to the present invention utilizes an LTE network interworking device that is in charge of protocol conversion between MME-HSS to perform delivery and processing of a diameter message necessary for interworking protocol interfaces such as Gxx, Rx, Gx in an EPC network. It can provide the function of the diameter message processing gateway, which can be operated by the flexible operation of the DRA (Diameter Router Agent) mode in the LTE network interworking device in accordance with the trend of increasing subscribers, between PCEF, AF, PCRF It is expected to be used as a gateway device for exchanging profile information such as service policy and quality of service (QoS) for each subscriber.

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

Claims (8)

In the method of diameter message service of an inter-working function having a proxy gateway function,
When the diameter request message is received from a DRA (Diameter Router Agency) client in the packet data network gateway, transmitting a diameter request message to a PCR < RTI ID = 0.0 > (FQF) < / RTI >
Creating a context for the received diameter request message;
Transmitting a diameter response message to the DRA client when a diameter response message is received from the PCRF;
Deleting the created context.
Method of diameter message service in mobile communication system. The method of claim 1,
The method comprises:
Querying whether the DRA binding information exists in the database,
Generating and storing binding information in the database when the DRA binding information does not exist in the database;
And storing the gateway session information for the DRA client in the database by matching the binding with the corresponding binding.
Method of diameter message service in mobile communication system. The method of claim 1,
The method comprises:
When generating binding information for adding a session, if the DRA binding information exists in the database, the method further includes transmitting a diameter request message to the PCRF of the bound information.
Method of diameter message service in mobile communication system. The method of claim 1,
The method comprises:
When changing a session by the DRA client, if a diameter sub-sequent request message is received from the DRA client, the DRA binding information is queried whether the DRA binding information exists in the database, and then the diameter request is requested by the PCRF of the bound information. Further comprising the step of sending a message
Method of diameter message service in mobile communication system. The method of claim 1,
The method comprises:
When changing a session by the PCRF, if a diameter PCRF initialized request message is received from the PCRF, inquiring whether session information for the DRA client exists in a DB;
Sending a diameter request message to the DRA client of the queried session;
When the diameter response message is received from the DRA client, transmitting the diameter response message to the PCRF having received the message by the context stored in the database;
The method may further include deleting the generated context.
Method of diameter message service in mobile communication system. The method of claim 1,
The method comprises:
When a termination-sequent request message is received from the DRA client, inquiring whether there is DRA binding information in a database, and transmitting the diameter termination request message to the PCRF of the bound information;
Generating a context for the received diameter end request message;
When the diameter response message is received from the PCRF, transmitting the diameter response message to the DRA client that has received the message by the context stored in the database;
Deleting the generated context, and deleting session information about the corresponding session from the database.
Method of diameter message service in mobile communication system. The method of claim 1,
The method comprises:
When a diameter termination request message is received from the DRA client, inquiring whether DRA binding information exists in a database, and transmitting the diameter termination request message to a PCRF of the DRA bound information to be queried;
Generating a context for the received diameter end request message;
When a diameter response message is received from the PCRF, transmitting a message to the DRA client that has received the message by the context stored in the database;
Deleting the generated context and deleting session information about the corresponding session from the database;
If all session information is deleted, further comprising the step of deleting information about the binding
Method of diameter message service in mobile communication system. In the diameter message service method of a network interworking device having a redirect gateway function,
When the diameter generation request message is received from the DRA client in the packet data network gateway, selecting the PCRF selected by the routing policy;
Querying whether DRA binding information exists in a database, and storing new binding information in the database when the DRA information does not exist in the database;
And when the DRA client receives a diameter response message including PCRF information from the network interworking device, transmitting the received diameter response message to the PCRF.
Method of diameter message service in mobile communication system.

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