KR101980856B1 - Method and apparatus for processing call event - Google Patents

Abstract

The present invention relates to a call processing apparatus and method. The call processing apparatus includes a designated information storage unit for storing country information or network provider information for call processing for a predetermined designated call, and a designated information storage unit for storing the designated information when the call connection request is received from the terminal apparatus A gateway information storage unit for storing connection information for a designated gateway for bearer setting of a designated call, and a gateway for selecting a designated gateway according to the connection information for the determined designated call, And a network selecting unit for selecting one of the plurality of network topologies.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a call processing apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a call processing apparatus and method, and more particularly, to a call processing apparatus and method for selecting a predetermined gateway for a preset call to set a bearer.

A 3GPP (Third Generation Partnership Project) mobile communication system based on WCDMA (Wideband Code Division Multiple Access) radio access technology is widely deployed all over the world, and HSDPA (High Speed Downlink Packet Access) provides a 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. Cost reduction per bit, increased service availability, use of flexible frequency band, simple structure and open interface, and proper power consumption of UE (User Element). In addition, prevention of unnecessary latency at a network node and efficient use of network resources can also promote technology evolution in 3GPP.

3GPP Release 8 describes an Evolved Packet Core (EPC) as a network architecture 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 evolves the core network of the existing 3GPP system architecture to support Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN), which is an evolved RAN, And has an efficient network structure that simplifies the network node. A wireless communication system including an EPC and an E-UTRAN may be referred to as an EPS (Evolved Packet System), and the LTE mobile communication system currently being implemented and serviced in Korea corresponds to this.

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

PGW acts as a global mobility anchor for mobility between 3GPP access technology and non-3GPP access technology (such as CDMA2000, WiMAX or WIFI) and as a gateway to the external network. The PGW allocates an IP (Internet Protocol) of a mobile communication terminal, performs session control for interworking with an external Internet network and a non-3GPP network, has tunneling and IP routing functions for a packet service, And maintains routing information with the SGW and the external network.

SGW is a mobile anchor for mobility between 3GPP access networks (E-UTRAN, UTRAN, GERAN). The SGW performs session control for processing payload traffic according to a set session, interworks with the eNodeB with the S1-U interface, and performs handoff in the LTE mobile communication system and 3GPP User plane entities that support it.

The MME is a control plane entity responsible for mobility management of a terminal apparatus moving between eNodeBs, and is responsible for session management, and may be a kind of exchange server.

Meanwhile, in the initial stage of constructing the LTE mobile communication system, there is a mixed communication environment with a legacy network such as a WCDMA mobile communication system. In such a communication environment, the LTE mobile communication system can access the LTE network and can access a legacy network such as a WCDMA network A dual mode terminal apparatus can be operated. In the early stage of the LTE mobile communication service, a WCDMA mobile communication system was used to provide a voice communication service to a dual mode terminal, and an LTE mobile communication system was used to provide a data communication service.

Unlike this, it is VoLTE service that uses LTE mobile communication system not only for data communication but also for voice communication.

According to the VoLTE service, it is possible to provide 4 ~ 5 times cleaner HD voice call service in case of voice call, and users can display contents such as map, music, news, You can share.

The VoLTE service is a multimedia service using a packet bearer on the E-UTRAN in the LTE / EPC network. The terminal accesses the LTE / EPC network and updates the subscriber location and status information through subscriber information authentication After that, session setup and bearer allocation for multimedia service are provided and multimedia service is provided according to the appropriate quality of service (QoS) level allowed for the subscriber.

After the bearer allocated for the specific multimedia service is completed, the corresponding service is provided according to interworking between the terminal device and the service providing server in the IMS (IP Multimedia Subsystem) domain, and the MME and the SGW / PGW Are generally not involved in operations other than mobility management and bearer resource management (resource allocation, resource recovery, QoS allocation, etc.), respectively.

According to the related art, when the terminal device accesses the E-UTRAN and initially attaches to the EPC network via the MME, the eNodeB serving as a base station in the E-UTRAN transmits a connection And selects an appropriate MME from among a plurality of MMEs having the associated MMEs to transmit a message for initial connection.

The MME selects one of a plurality of SGWs so that the load is distributed based on the location information (TA) of the terminal device and the capacity of the SGWs based on the network topology. Here, SGWs that are locally adjacent to each other are selected on the basis of the location information of the terminal device. This is because the physical distance between the eNodeB and the SGW is excessively increased to prevent unnecessarily long user traffic paths in which a large number of packets are transmitted will be.

In addition, the SGW selects the PGW based on the subscriber profile. Then, a bearer is set up from the terminal apparatus to the PGW, and data communication is performed through the bearer. Here, when the terminal device is an inbound roamer, the SGW of the visited network and the PGW of the home network are interworked through the S8 interface.

If the call is a local call, the charging process is performed in the PGW. If the call is an inbound roaming call, the SGW of the visited network and the PGW of the home network The billing data for mutual settlement is generated.

Since the MME of the visited network selects the SGW based on the location information of the terminal device and the capacity of the SGWs, the SGW interworked with the PGW of the home network through the S8 interface is fixed at every occurrence of the inbound roaming call by the terminal device. It can be changed.

Therefore, the network topology must be configured so that the PGW of the home network can be interworked with any SGW among the plurality of SGWs located in the visited network, and the charging data generation function should be given to all the SGWs located in the visited network.

These problems are disadvantageous in constituting a simple network topology.

According to an embodiment of the present invention, there is provided a call processing apparatus and method for selecting a predetermined gateway for a preset call such as an inbound roaming call and setting a bearer.

The problems to be solved by the present invention are not limited to those mentioned above, and another problem to be solved can be clearly understood by those skilled in the art from the following description.

The call processing apparatus according to the first embodiment of the present invention includes a designated information storage unit in which country information or network provider information for call processing for a predetermined designated call is stored; A gateway information storage unit for storing connection information for a designated gateway for bearer setting of the designated call, and a gateway information storage unit for storing the determined designated call And a gateway selection unit for selecting the designated gateway according to the connection information and setting a bearer. Here, the designated call may be an inbound roaming call.

A method of processing a call according to a second embodiment of the present invention includes the steps of determining whether a call is a predetermined call compared with predetermined country information or network carrier information upon receiving a call connection request from the terminal device, And selecting the designated gateway according to the connection information for the designated gateway for bearer establishment so that the bearer is set. Here, the designated call may be an inbound roaming call.

According to the embodiment of the present invention, a predetermined gateway is selected for a preset call such as an inbound roaming call and the bearer is set. That is, a dedicated gateway or designated gateway for a designated call, such as an inbound roaming call. For example, when an inbound roaming call occurs, the SGW interlocked with the PGW of the home network through the S8 interface is fixed. Therefore, the network topology is configured so that the PGW of the home network can be interworked with the dedicated SGW or the designated SGW among the plurality of SGWs located in the visited network, and the charging data generation function is given only to the dedicated SGW or the designated SGW, Generation function is not required.

Therefore, it is possible to increase the efficiency of the network by constructing a simple network topology.

1 is a network configuration diagram of a mobile communication service system capable of employing a call processing apparatus according to an embodiment of the present invention.
FIG. 2 is an exemplary diagram showing connection states between eNodeB-SGWs constituting an LTE mobile communication system included in the mobile communication service system of FIG. 1;
3 is a block diagram of a call processing apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating a call processing method by a call processing apparatus 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 become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

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 in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

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

1 is a network configuration diagram of a mobile communication service system capable of employing a call processing apparatus according to an embodiment of the present invention. The call processing apparatus according to an embodiment of the present invention can be employed in various mobile communication service systems for operating a packet network. FIG. 1 shows an example of a Wideband Code Division Multiple Access (WCDMA) mobile communication system and an LTE (Long Term Evolution) A hybrid mobile communication service system in which a mobile communication system operates together is shown. Of course, the mobile communication system employing the call processing apparatus according to the embodiment of the present invention is not limited to the WCDMA mobile communication system or the LTE mobile communication system. For example, other asynchronous mobile communication systems such as Global System for Mobile (GSM), and other synchronous mobile communication systems such as CDMA2000.

A mobile communication service system capable of employing a call processing apparatus according to an embodiment of the present invention will be described with reference to FIG.

The WCDMA mobile communication system 100 includes a Node B 110, an RNC 120, a Mobile Switching Center / Visitor Location Register (MSC / VLR) 130, a CGS 140, (Serving General Packet Radio Service Support Node) 150 and a Gateway General Packet Radio Service Support Node (GGSN) 160.

The Node B 110 and the RNC 120 correspond to a radio access network area and the MSC / VLR 130 and the CGS 140 correspond to a circuit exchange core network. The SGSN 150 and the GGSN 160 exchange packets. Corresponds to the core network.

The NodeB 110 includes a plurality of cells, and a plurality of UEs 10 may be connected to the cells. The NodeB 110, which is an aggregate of these cells, secures a frequency used for connection with the terminal devices 10 and ensures a stable connection with the terminal devices 10.

The RNC 120 controls a plurality of NodeBs 110, allocates communication resources to each of the NodeBs 110, and handles functions such as handover.

The MSC / VLR 130 stores visitor location information, receives subscriber profile information, authentication and location related data from the HSS 410, and performs switching control for voice communication.

The CGS 140 serves as a gateway for connecting the WCDMA mobile communication system 500 to a general communication network, thereby enabling communication with another communication system connected to the general communication network. For example, the CGS 140 serves as a gateway between the circuit network 420 and the MSC / VLR 130 and is connected to the LTE mobile communication system 200 through the IMS 300 connected to the circuit network 420, Thereby enabling circuit communication between the systems 100. This CGS 140 may also be referred to as a GMSC (Gateway MSC) or a gateway exchange.

The SGSN 150 and the GGSN 160 belonging to the packet-switched core network area are connected to an IP network 430 such as the Internet, that is, a packet data network (PDN), to receive a packet- IP-based protocol interworking for matching with

To this end, the SGSN 150 is connected to various RNCs 120 to manage the mobility of the terminal device 10 and the packet session management, sets a PDP context with the GGSN 160, and uses tunneling And transmits a protocol data unit. Also, the SGSN 160 can perform IP routing and can perform an interaction such as location registration of the terminal device 10. [

The GGSN 160 directly connects to the IP network 430 and acts as a gateway for connecting the IP network 430 and the packet switched (PS) domain of the WCDMA mobile communication system 100. The SGSN 150, And maintains routing information with the external network, and performs tunneling and IP routing functions.

The LTE mobile communication system 200 includes an eNodeB 210, an MME 220, an SGW 230, a PGW 240, and a Policy & Charging Rule Function (PCRF) 250.

The eNodeB 210 is a device that supports next generation technologies and services such as LTE, and functions as radio frequency (RF) transmission of transmission signals, measurement of signal strength and quality of transmission and reception, baseband signal processing, and channel card resource management . The eNodeB 210 ensures a stable connection with a plurality of terminal devices 10.

The MME 220 is a node for managing the mobility of the terminal device 10 and is responsible for session management, idle subscriber management, paging, and subscriber authentication functions. That is, the MME 220 performs control such as processing a control signal when there is a binding request from the terminal device 10 or another network node, for example, PGW 240 or SGW 230, And receives the subscriber profile information, authentication, and location related data from the HSS 410 to configure the EPS bearer or the IP tunnel and to manage the mobility management. Function. The MME 220 may include the call processing apparatus according to the embodiment of the present invention or may physically operate in a separated state.

The SGW 230 is a user plane node that performs session control for processing payload traffic according to a set session and is interworked with an eNodeB 210 through an S1-U interface, And handoffs in the 3GPP 200 and the 3GPP are established and the PGW 240 and the EV bearer (Evolved Packet System bearer) are set and the PDU (Packet Data Unit) is transmitted using the tunneling. The SGW 230 selects the PGW 240 based on the subscriber profile, and generates billing data for mutual settlement with the PGW of the home network in case of an inbound roaming call.

The PGW 240 is a user plane node that assigns an IP address of the terminal device 10 and performs session control in cooperation with an external Internet network and a non-3GPP network. The PGW 240 is a user plane node that provides SGW 230, And has tunneling and IP routing functions. And delivers the PDU to the SGW 230 and the external network. The PGW 240 performs a charging process in the case of a local call.

The PCRF 250 provides dynamic QoS and billing rules according to the service data flow to perform communication policies and billing processing in the communication network.

The IP Multimedia Subsystem (IMS) 300 includes a Call Session Control Function (CSCF) 310, an Inter-working Media Gateway (IMG) 320, and a Home Subscriber Server (HSS)

CSCF 310 is an infrastructure system that performs call processing and performs basic functions for multimedia session control based on SIP (Session Initiation Protocol). The CSCF 310 handles subscriber registration, authentication, billing, triggering and routing by service, inquiry of the location of the called party, compression and release of SIP messages, and can be divided into Proxy_CSCF, Interogating-CSCF and Serving-CSCF according to their roles.

The IMG 320 converts signaling and media for interworking with the LTE mobile communication system 200 connected to the CSCF 310 and the WCDMA mobile communication system 100 connected to the circuit network 420.

The HSS 330 is a network node including a data base including subscriber information for a wireless communication system for the WCDMA mobile communication system 100 and / or the LTE mobile communication system 200, Information, authentication, and location-related data.

In the embodiment of FIG. 1, the WCDMA mobile communication system 100 and the LTE mobile communication system 200 operate the HSS 410 in an integrated manner, and the IMS 300 operates the HSS 330 independently , The WCDMA mobile communication system 100 or the LTE mobile communication system 200 may also operate the HSS as a standalone type. Also, the WCDMA mobile communication system 100, the LTE mobile communication system 200, and the IMS 300 may operate one HSS in an integrated manner.

1, in a communication environment in which the WCDMA mobile communication system 100 and the LTE mobile communication system 200 are mixed, it is possible to access the WCDMA mobile communication system 100 through the NodeB 110, A dual mode terminal device 10 capable of connecting to the LTE mobile communication system 200 can also be operated.

The terminal device 10 is a multimedia device group for providing a variety of multimedia services including a voice service and a video service to a subscriber using an IMS network according to an embodiment of the present invention. A smart phone, a notepad, a tablet computer, and the like. Such a terminal device 10 can provide a broadband communication service to a subscriber by interfacing with a broadband connection through a NodeB 110 or an eNodeB 210 and can provide a broadband communication service to a subscriber through a WCDMA based third generation, A broadband communication service including a communication environment such as LTE or mobile WIMAX (mobile world interoperability for microwave access) and an IP (Internet Protocol) based communication environment such as the Internet can be provided.

In the early stage of the LTE mobile communication service, a WCDMA mobile communication system 100 is used to provide a voice communication service to the terminal device 10, and an LTE mobile communication system 200 is used to provide a data communication service. Unlike the above, it is VoLTE voice / video call service using the LTE mobile communication system 200 up to voice communication as well as data communication.

FIG. 2 is an exemplary diagram showing connection states between eNodeB-SGWs constituting an LTE mobile communication system included in the mobile communication service system of FIG. 1;

When the terminal device 10 accesses the E-UTRAN and first accesses the EPC network via the MME, the eNodeB 210 selects an appropriate MME from the plurality of MMEs 220 connected through the S1-U interface And transmits a message for initial connection.

The MME 220 selects an appropriate SGW among the plurality of SGWs 230-1, 230-2, ..., and 230-N, and sets the bearer between the SG 10 and the SGW and the PGW. The MME 220 selects and connects a designated SGW or a dedicated SGW among a plurality of SGWs 230-1, 230-2, ..., 230-N for a predetermined designated call. When the MME 220 determines that it is not the preset call, the MME 220 transmits the location information TA of the terminal device 10 and the SGWs 230-1, 230-2, ..., 230-N based on the network topology. ), The SGW can be selected so that the load is dispersed on the basis of the capacity of the SGW. To this end, the MME 220 may include the call processing apparatus according to the embodiment of the present invention, or may physically operate in a separated state.

3 is a block diagram of a call processing apparatus according to an embodiment of the present invention.

The call processing apparatus 500 includes a designated information storage unit 510, a designated call determination unit 520, a gateway information storage unit 530, a gateway selection unit 540, an input unit 550, and the like do.

The designation information storage unit 510 stores designation information for call processing for a predetermined designated call. For example, the designated call may be an inbound roaming call, and the designated information may be Mobile Country Codes (MCC) or Mobile Network Codes (MNC).

Upon receiving the call connection request from the terminal apparatus, the designated call discrimination unit 520 compares the designated information stored in the designated information storage unit 510 to determine whether the call is an assigned call. For example, when the country information of the call originated by the terminal device or the network provider information is the same as the MCC or MNC previously stored in the designated information storage 510, it can be discriminated and confirmed as the inbound roaming call.

The gateway information storage unit 530 stores connection information for a designated gateway for bearer setting of a designated call. For example, connection information for a designated SGW or a dedicated SGW for processing a designated call among a plurality of SGWs may be stored. In addition, the gateway information storage unit 530 may store location information and capacity information for a plurality of SGWs for use in selecting a gateway call for a call other than a designated call, that is, a general call.

The gateway selection unit 540 selects a designated gateway according to the connection information stored in the gateway information storage unit 530 for the designated call according to the determination result by the designated call determination unit 520, for example, selects a designated SGW or a dedicated SGW So that the bearer is set. In addition, the gateway selecting unit 540 determines location information of the terminal device for the remaining calls other than the designated call, that is, the general call, and then, based on the location information and the capacity information of the plurality of SGWs stored in the gateway information storing unit 530 A predetermined SGW can be selected so that the load is dispersed.

The input unit 550 may store or update the designated information for the designated call in the designated information storage unit 510 or store or update the connection information for selecting the gateway in the gateway information storage unit 530. For example, the input unit 550 receives information from a user via a GUI (Graphical User Interface), and updates the designated information storage unit 510 and the gateway information storage unit 530.

4 is a flowchart illustrating a call processing method by a call processing apparatus according to an embodiment of the present invention.

As described above, the call processing method includes a step (S611 to S617) of determining whether a received call is a preset designated call upon receiving a call connection request from a terminal device, a connection to a designated gateway for setting a bearer of the determined designated call (S631 to S625) for selecting a designated gateway according to the information to set a bearer; selecting a predetermined gateway in consideration of positional information and load distribution for the remaining calls other than the designated call, S633).

When the call is received, step (S613) of loading the designated information for call processing for the designated call is performed, and connection information for the designated gateway for setting bearer of the designated call is loaded A step S615 of comparing a call received from the terminal device with the designation information to determine whether the designation call is a designated call; and a step of selecting a designated gateway according to the connection information for the determined designated call, Steps S621 to S625 and steps S631 and S633 for setting a bearer by selecting a predetermined gateway considering positional information and load distribution for the remaining calls that are not designated calls. Here, although not shown in FIG. 4, it may further include storing or updating designation information for identifying a designated call or connection information for connection of a gateway. Steps S613 and S615 may be performed before performing step S611, and step S615 may be performed after performing step S617.

Hereinafter, with reference to FIG. 1 to FIG. 4, a call processing method by the MME or the call processing apparatus which includes the call processing apparatus according to the embodiment of the present invention as a whole or physically separated Let's look at it.

First, when the terminal device 10 accesses the E-UTRAN and accesses the EPC network via the MME for the first time, the eNodeB 210 selects an appropriate MME among the plurality of MMEs 220 connected through the S1-U interface And transmits a message for the initial connection.

Then, the MME 220 selects an appropriate MME from among the plurality of SGWs 230-1, 230-2, ..., and 230-N so that the bearer between the terminal device 10 and the SGW and the PGW 240 is set do. The MME 220 selects and connects a designated SGW or a dedicated SGW among a plurality of SGWs 230-1, 230-2, ..., 230-N for a predetermined designated call. In addition, when the MME 220 determines that the predetermined call is not made, the MME 220 determines the location information of the terminal device 10 and the capacity of the SGWs 230-1, 230-2, ..., 230-N based on the network topology So that the SGW can be selected so that the load is distributed.

The designated call discriminator 520 of the call processing device 500 transmits a call control message to the terminal device 10 for the selection process of the SGWs 230-1, 230-2, ..., 230-N by the MME 220 The designation information storage unit 510 reads designation information for call processing for a predetermined designation call and loads the designation information into the memory (S613). For example, the designated call may be an inbound roaming call, and the designated information may be country information or network carrier information.

In addition, the gateway selecting unit 540 reads the connection information for the designated gateway for bearer setting of the designated call from the gateway information storing unit 530 and loads the connection information into the memory (S615).

Next, the designated call discriminator 520 compares the call generated by the terminal 10 with the designation information loaded in the memory, and discriminates whether the call is a generated call (S617). For example, when the country information of the call originated by the terminal device 10 or the network provider information is the same as the country information or the network provider information pre-stored in the designated information storage 510, it can be discriminated and confirmed as an inbound roaming call.

Then, the gateway selecting unit 540 selects the designated gateway according to the connection information for the designated gateway loaded in the memory for the determined designated call, so that the bearer is set. For example, the gateway selecting unit 540 selects a designated SGW or a dedicated SGW among the plurality of SGWs 230-1, 230-2, ..., 230-N to set bearers (S621 and S623).

Here, the gateway selected and connected by the gateway selecting unit 540 can generate accounting data for the designated call. For example, the SGW of the visited network may generate charging data for mutual settlement with the PGW of the home network for the inbound roaming call (S625).

The gateway selection unit 540 determines the location information of the terminal device 10 and determines the number of SGWs 230 stored in the gateway information storage unit 530. In step S617, 1, 230-2,..., 230-N (S631 and S633).

Meanwhile, the input unit 550 may store or update the designation information for the designated call in the designation information storage unit 510, store or update the connection information for selecting the gateway in the gateway information storage unit 530 An interface such as a GUI can be provided to the user. The input unit 550 may receive information from a user through an interface such as a GUI to update the designated information storage unit 510 and the gateway information storage unit 530.

Each block of the block diagrams attached hereto and combinations of steps of the flowchart diagrams may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, And means for performing the functions described in each step are created. These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible for the instructions stored in the block diagram to produce a manufacturing item containing instruction means for performing the functions described in each block or flowchart of the block diagram. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible that the instructions that perform the processing equipment provide the steps for executing the functions described in each block of the block diagram and at each step of the flowchart.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

According to the embodiment of the present invention, a predetermined gateway is selected for a predetermined call such as an inbound roaming call and the bearer is set. That is, a dedicated gateway or designated gateway for a designated call, such as an inbound roaming call. The embodiment of the present invention can improve the efficiency of the network by constructing a simple network topology and can be used when designing and operating various mobile communication systems including an LTE (Long Term Evolution) mobile communication system.

500: call processing device 510: designation information storage unit
520: Designated call discriminator 530: Gateway information storage
540: Gateway selection unit 550: Input unit

Claims (4)

A designated information storage unit in which country information or network provider information for call processing for a predetermined designated call originated by an inbound roamer is stored;
A designated call discriminator for discriminating whether the call is a designated call or a general call originated by the inbound roamer when the call connection request is received from the terminal device,
A gateway information storage unit for storing connection information for a designated gateway for bearer setting of a designated call originated by the inbound roamer and connection information for a plurality of gateways for bearer setting of the general call;
The designated gateway is selected according to the connection information for the designated gateway with respect to the designated call originated by the inbound roamer identified so as to set a bearer, and based on connection information for the determined gateway, And a gateway selecting unit for selecting a specific gateway so that the bearer is set so that the load is distributed. delete When receiving a call connection request from a terminal device, comparing the current call connection request information with predetermined country information or network carrier information to determine whether the call is a preset call or a general call originated by an inbound roamer;
Selecting a designated gateway according to connection information for a designated gateway for bearer setting of the designated call for the designated call originated by the identified inbound roamer to set a bearer, And selecting a specific gateway to load the bearer based on the connection information for the multiple gateways for bearer establishment.
delete

Images