KR20200071564A - Apparatus and method for calculating roaming charge using blockchain - Google Patents

Abstract

Disclosed are an apparatus for verifying billing data collected in a home network and a visited network when calculating roaming charges using a blockchain between a home network operator and a visited network operator and a method thereof. According to an aspect of the present invention, a gateway apparatus for communicating with a blockchain network which performs the settlement of roaming charges between visited networks in a home network by a smart contract comprises: a receiver for receiving billing data of a roaming mobile terminal from one of the home network or the visited network; a conversion unit for converting the received billing data into a transaction format of the blockchain network; a transmission unit for transmitting the billing data converted into the transaction format to the blockchain network; and a verification unit which receives unsettled billing data in a smart contract of the blockchain network from the blockchain network, verifies the unsettled billing data, and reports the verification result to the home network or the visited network.

Description

Apparatus and method for settlement of roaming charges using blockchain{APPARATUS AND METHOD FOR CALCULATING ROAMING CHARGE USING BLOCKCHAIN}

The present invention relates to settlement of roaming charges in a mobile communication service, and more particularly, to an apparatus and method for settlement of roaming charges between a home network operator and a visitor network operator using a blockchain.

In the current mobile communication service, a service that provides a mobile phone calling and receiving service to any subscriber in any region through interworking between systems and bilateral agreements between mobile operators when a subscriber visits abroad is called an overseas roaming service. The mobile communication network before moving is referred to as the home network and the mobile communication network after moving is referred to as the visiting network7. According to the commercialization of such an overseas roaming service, a mobile communication subscriber can easily make a call using his/her own number even if he/she moves abroad to a geographically long distance and cannot directly access a domestic mobile communication system.

Such a roaming service may be provided according to a contract between a home network operator and a visitor network operator, and the visitor network operator may settle the home network subscriber by billing the home network operator for a fee using his network. According to the conventional roaming fee settlement method, when a home network subscriber uses a visited network, the visited network operator uses the subscriber's usage data on a daily basis through a roaming settlement center, for example, a data clearing house. It is transmitted to the home network operator, and the fee data according to the usage amount is transmitted to the home network operator in a monthly unit through a separate roaming settlement center, for example, a financing clearing house. The home network operator pays the roaming fee to the visited network operator according to the fee data received through the roaming settlement.

However, according to the above-described conventional method, real-time settlement is difficult because it bundles roaming traffic data on a daily basis and consigns it to the settlement center to settle roaming charges, and it is also difficult to quickly respond to roaming scams or customer complaints. In addition, since the roaming fee is settled through the settlement, there is a delay problem because the settlement and relay fees are continuously generated and the payment is collected by monthly settlement. To solve this problem, attempts to settle roaming charges using blockchain are being developed. However, this attempt focuses only on the settlement of roaming charges using an automated method using a blockchain, and suggests a method to verify the roaming billing information when setting the roaming charges using an automated method using a blockchain. It is not becoming.

An object of the present invention is to provide an apparatus and method for verifying charging data collected in a home network and a visited network when calculating a roaming fee using a blockchain between a home network operator and a visited network operator.

In a home network according to an aspect, a gateway device that communicates with a blockchain network that performs settlement of roaming charges between visited networks by a smart contract includes: a reception unit that receives billing data of a roaming mobile terminal from one of the home network or the visited network; A conversion unit that converts the received charging data into a transaction format of the blockchain network; A transmission unit that transmits the billing data converted to a transaction format to the blockchain network; And a verification unit that receives uncalculated billing data from the smart contract of the blockchain network from the blockchain network and verifies uncalculated billing data to report verification results to the home network or the visited network.

Further comprising a rules database for storing rules for analyzing the uncalculated billing data, the verification unit, the analysis module for analyzing whether the uncalculated billing data is a charging error or roaming fraud with reference to the rules database; And a reporting module for reporting the analysis results of the analysis module to the home network or the visited network.

The verification unit may further include an update module for updating the rule database based on the analysis result of the analysis unit.

The rules database may be directly connected to and synchronized with a database referenced by the smart contract of the blockchain network.

The rules database may transmit version information of a database to the blockchain network through the transmission unit, so that the synchronization can be verified.

In a home network according to another aspect, an operation method of a gateway device communicating with a blockchain network that performs settlement of roaming charges between visited networks by a smart contract, receives billing data of a roaming mobile terminal from one of the home network or the visited network step; Converting the received billing data into a transaction format of the blockchain network; Transmitting the billing data converted to a transaction format to the blockchain network; And receiving unsettled charging data from the blockchain network in the smart contract of the blockchain network and verifying unsettled charging data to report verification results to the home network or the visited network.

The reporting may include analyzing whether the uncalculated billing data is a billing error or a roaming fraud by referring to a rule database; And reporting the analysis results to the home network or the visited network.

The reporting step may further include updating the rules database based on the analysis result.

The rules database may be directly connected to and synchronized with a database referenced by the smart contract of the blockchain network.

The operation method may further include verifying the synchronization by transmitting version information of the rules database to the blockchain network.

In a home network according to another aspect, a blockchain node performing roaming charge settlement between visited networks compares billing data received from the home network with billing data received from the visited network and compares smart contracts to determine the effectiveness of the billing data ; A billing smart contract that charges a roaming charge of a roaming mobile terminal and calculates a payment amount between the home network and the visited network based on billing data that has passed the validity of the comparison smart contract; A remittance smart contract for remitting the payment amount settled in the charging smart contract to the home network or the visited network; And an invalidation processing smart contract that transmits charging data determined as invalid in the comparison smart contract to the home network or a blockchain gateway of the visited network.

The comparison smart contract may determine the validity of the billing data by referring to a rule database synchronized with the blockchain gateway.

The comparison smart contract compares version information received from the home network or the visited network with version information of the rule database, and if not, updates the rule database by receiving update data from the home network or the visited network can do.

According to the present invention, errors in real-time settlement can be reduced by classifying and verifying invalid charging data while settlement of roaming charges between mobile operators in real time using a blockchain.

According to the present invention, it is possible to increase the accuracy of validating the billing data by synchronizing and updating the rule database for validating the billing data in real time.

1 is a view showing a system for settlement of roaming charges according to an embodiment of the present invention.
2 is a schematic block diagram of a blockchain node according to an embodiment of the present invention.
3 is a view showing the configuration of the blockchain gateway of FIG. 1.
4 is a view showing in detail the configuration of the verification unit of FIG. 3.
5 is a flowchart illustrating an overseas roaming fee settlement method according to an embodiment of the present invention.

The above objects, features, and advantages will be more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. There will be. In addition, in the description of the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a system for settlement of roaming charges according to an embodiment of the present invention.

Referring to FIG. 1, a roaming service is a mobile communication subscriber that can use a mobile communication service in any of both regions by interworking between systems when visiting from one service area to another service area. The mobile communication network after moving is referred to as a visited network. Accordingly, as illustrated in FIG. 1, a mobile communication system providing a roaming service may be divided into a home network 110 and a visited network 120. The home network 110 is a network of operators to which the mobile terminal 130 is subscribed, and the visited network 120 is a network of overseas operators visited by the mobile terminal 130.

The home network 110 and the visit network 120 include a base station, a mobile switching center (MSC), a gateway GPRS support node (GGSN), a mobility management entity (MME), a packet gateway (P-GW), and a home. It may include a Home Location Register (HLR)/Home Subscriber Server (HSS), billing systems 111 and 121, a global roaming gateway that relays global roaming calls, and the like. The billing systems 111 and 121 of the home network 110 and the visited network 120 process billing data based on a subscriber's phone number, that is, a billing process based on a mobile station international ISDN number (MSISDN) or an international mobile subscriber identity (IMSI). The billing systems 111 and 121 store the roaming billing policy and generate billing data, that is, CDR (Call Data Records) when the call origination or call reception of the roaming mobile terminal 130 ends. The billing systems 111 and 121 may include RSCP (Roaimg Service Control Point), etc. The billing data includes roaming subscriber identification information (eg, MSISDN, IMSI, etc.), data usage, voice call time, and visits. Countries, telecommunications providers, etc. The charging systems 111 and 121 of the home network 110 and the visited network 120 transmit the billing data to the blockchain gateways 112 and 123 when the billing data is generated.

When the blockchain gateways 112 and 122 receive the charging data from the charging systems 111 and 121, they are converted into the transaction format of the blockchain network and transmitted to the blockchain network. The blockchain gateways 112 and 122 may receive the charging data in real time and transmit it to the blockchain network, or receive the charging data in a bundle unit and transmit it to the blockchain network. The blockchain gateways 112 and 122 may be installed with a wallet program containing a private key that can use the blockchain network, and the wallet program may be used as a representative account of a mobile communication company. That is, the blockchain gateways 112 and 122 become clients of the blockchain network. If necessary, the wallet program can have multiple access authority keys, and these keys can be created or deleted. Blockchain gateways 112 and 122 receive uncalculated billing data from the blockchain network, verify the received uncalculated billing data, and transmit verification results to home networks 110 and 120, and also block verification results Share it on the chain network. Meanwhile, the blockchain gateways 112 and 122 may be connected to each other through an internet network.

The blockchain network includes a plurality of blockchain nodes 113 and 123, and each blockchain node 113 and 123 is connected to blockchain gateways 112 and 123 of each mobile communication company. The types of blockchains include public block chains, private block chains, and consortium block chains. The public blockchain method is not restricted to anyone in the world who is anonymous to participate in the blockchain network, so individuals who want to participate can access the blockchain network to view and create transaction records. And in order to maintain this public blockchain network, it provides economic incentives to anonymous participants. A typical example of such an incentive is the Proof of Work method, but this verification method causes a performance degradation problem on the network and any anonymous participant can share the ledger, so it is not suitable for business tasks that are difficult to disclose. . There exists a private blockchain and a consortium blockchain that can solve such performance degradation and information disclosure problems of unspecified multiple targets, and in the present invention, a consortium blockchain technology in which various mobile communication companies participate can be used. A plurality of blockchain nodes (113, 123) of the blockchain network receive a transaction of roaming charging data from the mobile operator's blockchain gateways (112, 122) and block the transaction when an agreement is reached through the agreement process of the participants. Record in addition to the block.

The plurality of blockchain nodes 113 and 123 of the blockchain network may be configured as a computer system such as a server or a PC, and may include communication means and memory and at least one processor. The memory may include high-speed random access memory, and may also include one or more magnetic disk storage devices, non-volatile memory such as flash memory devices, or other non-volatile semiconductor memory devices. In some embodiments, the memory is a storage device located away from one or more processors, for example, communication circuitry, the Internet, an intranet, a local area network (LAN), a wide LAN (WLAN), a storage area network (SAN), etc. Or a network attached storage device, database accessed through a communication network, such as a suitable combination of these. A smart contract, which is a program implemented to perform a specific set operation when a certain condition is satisfied, may be installed in the memory and executed by the at least one processor.

The smart contract is a program implemented to perform a specific set operation when a certain condition is satisfied. In this embodiment, the billing data received from the home network 110 and the billing data received from the visited network 120 are compared and matched. In this case, a roaming fee is settled according to a preset method and virtual currency or real money is paid to the visitor network 120. At this time, the smart contract is settled by offsetting if there is an amount that the home network 110 needs to receive from the visited network 120. The smart contract does not perform settlement on the billing data judged to be the wrong billing data, and transmits the uncalculated billing data to the home network 110 or/and the visited network 120. The smart contract performs settlement for charging data with reference to the rules database, and the rules database is synchronized by direct communication with the rules database included in the blockchain gateways 112 and 123. The smart contract receives the version information of the rule database from the blockchain gateways 112 and 123 and compares it with the version information of the rule database of the blockchain nodes 113 and 123, and if they do not match, the direct blockchain gateway 112 and 123 The internal rule database can be updated by receiving update data of the rule database from.

2 is a schematic block diagram of a blockchain node according to an embodiment of the present invention. Referring to FIG. 2, the blockchain nodes 113 and 123 record charging data received from the home network 110 and the visited network 120 in the block 210. On the other hand, the smart contract 222 of the blockchain nodes 113, 123, as shown in Figure 2, the comparison smart contract 221, charging smart contract 222, remittance smart contract 223, invalid processing smart It includes a contract 224. These may be implemented as a single smart contract.

The comparison smart contract 221 compares the billing data received from the home network 110 stored in the block 210 and the billing data received from the visited network 120 as described above. At this time, the comparison smart contract 221 refers to the rules database 230. Table 1 shows an example of billing data.

value Explanation IMSI Unique identification number lledNumber / callingNumber Phone number calTimeStamp Call time talCallEventDuration Talk time leServiceCode SMS, Voice, Data classification changeRateCode Applicable exchange rate llTypeGroup (callTypeLevel1, 2) Communication types such as 3G and LTE arge Rate taVolumeIncoming Amount of data received taVolumeOutgoing Outgoing data volume argingId Separator for application of rate

The comparison smart contract 221 transfers the billing data having a comparison result abnormality to the invalid processing smart contract 224. For example, the comparison smart contract 221 transmits the billing data in which the voice call is set at $1 per minute for a specific subscriber in the home network 110, but in the visited network 120, 1 minute for the same subscriber Then, the billing data set at 10 yen is transmitted, and it is judged as invalid billing data when the billing rates are not the same. Alternatively, if the 3G call for a voice call of a specific subscriber is received from the home network 110, and the billing data applied by the LTE plan is received, it is determined as invalid billing data. Alternatively, as a result of referring to the rules database 230, it is determined that the data is invalid in the case of a fraud currency.

The comparison smart contract 221 compares the version information of the rule database 230 and the version information of the rule database 230 received from the home network 110 or the visited network 120, and the rule database 230 is updated. If it is not updated with data, the update data may be received from the home network 110 or the visited network 120 and stored in the rule database 230. The rule database 230 is preferably synchronized directly with the rule database built in the home network 110 or the visited network 120.

The billing smart contract 222 charges and sets the roaming fee using the billing data determined as valid billing data in the comparison smart contract 221. The remittance smart contract 223 transfers the billing and settlement roaming charges from the charging smart contract 222. For example, when the roaming mobile terminal 130 subscribed to the home network 110 uses a voice call in the visited network 120, the billing smart contract 222, the operator of the home network 110, the visited network 120 Settles the amount to be paid to the operator of the, and the remittance smart contract 223 transfers the settled amount to the operator of the visitor network 120 in virtual currency or real currency.

On the other hand, the invalid processing smart contract 224 transmits invalid charging data received from the comparison smart contract 221 to the home network 110 or the visited network 120.

3 is a view showing the configuration of the blockchain gateway of FIG. 1. Blockchain gateways 112 and 123 may include memory, one or more processors (CPUs), peripheral interfaces, input/output (I/O) subsystems, display devices, input devices, and communication circuitry. These components communicate over one or more communication buses or signal lines. The various components may be implemented in hardware, software or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits. The memory may include high-speed random access memory, and may also include one or more magnetic disk storage devices, nonvolatile memory such as flash memory devices, or other nonvolatile semiconductor memory devices or network attached storage devices accessed through a communication network, It may contain a database. The peripheral interface connects input and output peripherals to the processor and memory. One or more processors execute various functions and process data by executing various software programs and/or sets of instructions (instructions) stored in memory. The I/O subsystem provides an interface between input and output peripherals such as display devices and input devices and peripheral interfaces. The display device may use liquid crystal display (LCD) technology or the like. The processor may control reception and manipulation of input and output data between components using instructions retrieved from the memory. As a software component, an operating system, a graphics module (instruction set) and an application program (instruction set) are mounted (installed) in memory. The operating system may be, for example, a built-in operating system such as Darwin, RTXC, LINUX, UNIX, OS X, WINDOWS or VxWorks, Android, etc., and general system tasks (e.g., memory management, storage Device control, power management, etc.) to control and manage various software components and/or devices, and facilitate communication between various hardware and software components. The graphics module includes several well-known software components for presenting and displaying graphics on a display device. The communication circuit can perform wireless or wired communication. The communication circuit converts electrical signals into electromagnetic waves and vice versa, and can communicate with the communication network, other mobile gateways, and communication devices through the electromagnetic waves. Referring to FIG. 2, the blockchain gateways 112 and 122 include a receiving unit 310, a conversion unit 320, a transmission unit 330, a verification unit 340, and a rule database 350. The receiving unit 310, the converting unit 320, the transmitting unit 330, and the verifying unit 340 may be implemented as an application program and stored in the memory and executed by the processor.

The receiving unit 310 receives data by communicating with the billing systems 111 and 121 of the home network 110 or the visited network 120 and the blockchain nodes 113 and 123. Specifically, the receiving unit 310 receives the billing data from the billing systems 111 and 121 of the home network 110 or the visited network 120, and also receives unaccounted billing data from the blockchain nodes 113 and 123. can do. The receiving unit 310 may perform HTTP Rest communication or web socket communication with the charging systems 111 and 121 or the blockchain nodes 113 and 123.

The conversion unit 320 converts the billing data received from the reception unit 310 into a transaction format of a blockchain network. The transmitting unit 330 transmits the billing data converted in the transaction format from the converting unit 320 to the blockchain network, specifically to the blockchain nodes 113 and 123 connected to the corresponding gateways 112 and 123. . The transmitting unit 330 may transmit billing data through HTTP Rest communication or Web socket communication. Also, the transmission unit 330 may transmit version information of the rule database 350 to the blockchain network at the request of the verification unit 340.

The verification unit 340 verifies the unaccounted billing data received from the blockchain nodes 113 and 123 with reference to the rule database 350. Although it has been determined that the blockchain nodes 113 and 123 are not valid, the verification unit 340 verifies the unaccounted billing data once again. The verification unit 340 transmits the verification result to the home network 110 or the visited network 120. Further, the verification unit 340 may store and update the updated rule data received from the home network 110 or the visited network 120 in the rule database 350, or the rule database 350 according to the verification result ) Can be updated.

4 is a view showing in detail the configuration of the verification unit of FIG. 3. Referring to FIG. 4, the verification unit 340 includes an analysis module 410, a reporting module 420, and an update module 430.

The analysis module 410 refers to the rules database 350 for invalid, that is, unaccounted billing data received from the blockchain nodes 113 and 123, or whether the billing is due to the problem of the billing data itself, or an overseas fraud call It analyzes whether the settlement is due. For example, if the billing rate does not match, or if the call end time is recorded after the creation time of billing data, it is judged that the settlement is due to a problem in the billing data itself, and the calling number recorded in the billing data. Alternatively, if the called number is an overseas roaming fraud phone number, it is determined that the settlement is due to an overseas fraud call.

The reporting module 420 transmits a report recording the results analyzed by the analysis module 410 to the billing systems 111 and 121 of the home network 110 or the visited network 120. In addition, the reporting module 420 transmits the analysis result of the billing data of the overseas fraud call to the update module 430 so that it is reflected in the rule database 350.

The update module 430 stores the information of the overseas fraud call transmitted from the reporting module 420 in the rule database 350. The billing data may include the country information, IP address, etc., where the call originated or received, in addition to the phone number, the country information or IP address may be changed, or the IP address may change. It is the same but the phone number can be changed, and this change information is reflected in the rule database 350. In addition, the update module 430 may receive update data from the home network 110 or the visited network 120 and store the update data in the rule database 350.

5 is a flowchart illustrating an overseas roaming fee settlement method according to an embodiment of the present invention. The embodiment with reference to FIG. 5 will be described based on the home network 110.

Referring to FIG. 5, the mobile terminal 130 subscribed to the home network 110 travels to a foreign country and applies for a roaming service. The mobile terminal 130 connects to the mobile communication network of the corresponding foreign country, that is, the visited network 120 to use a mobile communication service such as a voice call. When the mobile terminal 130 sends a call from the visited network 120 to the called party of the home network 110, the call is received to the called party of the home network via the visited network 120 and the home network 110. Therefore, the visited network 120 and the home network 110 know the same call time, incoming/outgoing phone number, etc. of the roaming mobile terminal 130, and transmit billing data including this information to the blockchain network.

Referring to FIG. 5, the billing system 111 of the home network 110 generates billing data of the roaming mobile terminal 130 and transmits it to the blockchain gateway 112 (S501). The blockchain gateway 112 converts the received charging data into a transaction format of the blockchain network and transmits it to the blockchain node 113 connected to the blockchain network, that is, the home network 110 (S502, S503). In addition, the blockchain node 113 receives charging data generated by the visitor network 120 propagated from the blockchain node 123 connected to the other blockchain nodes of the blockchain network, that is, the visitor network 120. Record it in the block (S504).

The blockchain node 113 compares the billing data received from the home network 110 with the billing data received from the visitor network 120 and checks whether they match and analyzes whether each billing data is valid by referring to the rules database ( S505, S506). Even if the billing data received from the home network 110 and the billing data received from the visitor network 120 match, it may be billing data by an overseas fraud call as a result of referring to the rules database. In this case, it is judged as invalid charging data. In addition, the billing data itself may not match, or there may be an error in the billing data itself received from either the home network 110 or the visited network 120. For example, if the billing data creation date is before the end time of the outgoing call, it is an error in the billing data itself. The blockchain node 113 charges the roaming mobile terminal 130 according to predefined logic when the billing data is valid, calculates the amount to be paid to the visitor network 120, and calculates the amount to be paid to the visitor network 120. Send virtual currency or real money to the operator. At this time, the blockchain node 113, if there is an amount to be received from the visited network 120, is settled by offsetting processing. The billing and settlement details are recorded in the block of the blockchain network.

On the other hand, as a result of the analysis in step S506, if the billing data is invalid, the blockchain node 113 transmits the invalid billing data, that is, unaccounted billing data to the blockchain gateway 112 (S508). . The blockchain gateway 112 verifies the received unresolved billing data by referring to the rules database (S509). Although the validity was firstly determined by the blockchain node 113, it is verified once again by the blockchain gateway 112. The blockchain gateway 112 analyzes whether the unpaid billing data is unpaid due to the problem of the billing data or unpaid due to overseas fraud calls, and generates a result report accordingly to generate a billing system of the home network 110 (111 ) Can be transmitted (S510, S511).

On the other hand, the blockchain gateway 112, in the case of unsettled billing data by an overseas fraud call, analyzes the unsettled billing data and updates the rules database (S512). For example, if the country information of the caller making the scam is changed or the IP address is changed, it is reflected in the rules database. The rule database provided in the blockchain gateway 112 of the home network 110 is synchronized by direct communication with the rule database of the blockchain node. In addition, the blockchain gateway 112 communicates with the blockchain gateway 123 of the visited network 120 through the Internet, and the rules database of the corresponding blockchain gateway 123 is also synchronized.

While this specification includes many features, such features should not be construed as limiting the scope of the invention or the claims. In addition, features described in individual embodiments herein may be implemented in combination in a single embodiment. Conversely, various features that are described in a single embodiment herein may be implemented in various embodiments individually or in combination as appropriate.

Although the operations in the drawings have been described in a specific order, it should not be understood that such operations are performed in a specific order as shown, or a series of sequences, or all described actions are performed to obtain a desired result. . In certain circumstances, multitasking and parallel processing may be advantageous. In addition, it should be understood that the division of various system components in the above-described embodiment does not require such division in all embodiments. The above-described program components and systems may be generally implemented as a package in a single software product or multiple software products.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable form (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.). Such a process will not be described in detail any more as those skilled in the art to which the present invention pertains can easily carry out.

The present invention described above, since it is possible for a person of ordinary skill in the art to which the present invention pertains, various substitutions, modifications and changes are possible without departing from the technical spirit of the present invention. It is not limited by the drawings.

110: home network
120: visit network
111, 121: charging system
112, 122: Blockchain gateway
113, 123: Blockchain node
130: mobile terminal
221: Comparative smart contract
222: Billing smart contract
223: Remittance smart contract
224: void processing smart contract
230: Rules database

Claims (13)

As a gateway device that communicates with a blockchain network that performs settlement of roaming charges between visited networks in a home network by smart contracts,
A receiving unit for receiving charging data of the roaming mobile terminal from one of the home network or the visited network;
A conversion unit that converts the received charging data into a transaction format of the blockchain network;
A transmission unit that transmits the billing data converted to a transaction format to the blockchain network; And
A gateway device including a verification unit for receiving uncalculated billing data from the smart contract of the blockchain network from the blockchain network and verifying uncalculated billing data to report verification results to the home network or the visited network. According to claim 1,
Further comprising a rules database for storing rules for analyzing the uncalculated billing data,
The verification unit,
An analysis module for analyzing whether the uncalculated billing data is a billing error or a roaming fraud by referring to the rules database; And
And a reporting module for reporting the analysis results of the analysis module to the home network or the visited network. According to claim 2,
The verification unit,
And an update module for updating the rule database based on the analysis result of the analysis unit. The method of claim 3,
The rules database,
A gateway device, characterized in that the smart contract of the blockchain network is directly connected to and synchronized with a database referenced by the smart contract. The method of claim 4,
The rules database,
Gateway device characterized in that to verify the synchronization by transmitting the version information of the database to the blockchain network through the transmission unit. In the operating method of the gateway device to communicate with the blockchain network to perform the settlement of roaming charges between visited networks in the home network by smart contract,
Receiving charging data of the roaming mobile terminal from one of the home network or the visited network;
Converting the received billing data into a transaction format of the blockchain network;
Transmitting the billing data converted to a transaction format to the blockchain network; And
The method comprising the steps of receiving uncalculated billing data from the blockchain network and verifying uncalculated billing data in the smart contract of the blockchain network and reporting verification results to the home network or the visited network. The method of claim 6,
The reporting step,
Analyzing whether the uncalculated charging data is a charging error or a roaming fraud by referring to a rule database; And
And reporting the analysis result to the home network or the visited network. The method of claim 7,
The reporting step,
And updating the rules database based on the analysis result. The method of claim 8,
The rules database,
The method of operation, characterized in that the smart contract of the blockchain network is directly connected to and synchronized with the database referenced. The method of claim 9,
And verifying the synchronization by transmitting version information of the rules database to the blockchain network. In the blockchain node that performs the settlement of roaming rates between the home network and the visited network,
A comparison smart contract that compares the billing data received from the home network with the billing data received from the visited network and determines the validity of the billing data;
A billing smart contract that charges a roaming charge of a roaming mobile terminal and calculates a payment amount between the home network and the visited network based on billing data that has passed the validity of the comparison smart contract;
A remittance smart contract for remitting the payment amount settled in the charging smart contract to the home network or the visited network; And
A blockchain node including an invalid processing smart contract that transmits charging data determined to be invalid in the comparison smart contract to the home network or the blockchain gateway of the visited network. The method of claim 11,
The comparison smart contract,
A blockchain node characterized by determining the validity of the charging data by referring to a rule database synchronized with the blockchain gateway. The method of claim 12,
The comparison smart contract,
A block characterized by comparing version information received from the home network or the visited network with version information of the rule database, and if not, updating the rule database by receiving update data from the home network or the visited network Chain node.

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