KR20100124109A - Prepaid-card communication method and system of private mobilecommunication service system - Google Patents

Abstract

PURPOSE: A method and a system for calling with a prepaid card of a private mobile communication service are provided to supply call service at a lower cost by using the prepaid card. CONSTITUTION: A pMCT(private Mobile Communication Terminal) is registered in a pBSC(private Base Station Controller). A pMCT user registers prepaid card information in a prepaid card system. The pBSC transmits the prepaid card information and the opponent call number including an identification number of the private mobile communications terminal through a private exchange to a prepaid card system. Based on the received prepaid card information, the prepaid card system performs call connection to the call target number through call reply device.

Description

Prepaid card call method and system of private mobile communication service system {PREPAID-CARD COMMUNICATION METHOD AND SYSTEM OF PRIVATE MOBILECOMMUNICATION SERVICE SYSTEM}

The present invention relates to a communication service technology for a prepaid card in a private mobile communication service system associated with a mobile carrier, and in particular, a low cost service when making a call through a private mobile communication service system and a mobile carrier using a prepaid card. The present invention relates to a prepaid card call method and system of a private mobile communication service system.

In general, a private mobile communication service system installed and operated in a company, a campus, or a military unit is widely used as a toll-free telephone system or an on-site toll-free telephone system between users of mobile communication systems. However, such a private mobile communication service system is limited to the purpose of enabling the use of a local telephone for the purpose of a mobile phone.

As such, in the interworking system of the conventional mobile public network and the wired / wireless private network, the internal telephone can be used for the use of a mobile phone, causing an increase in the internal call volume and indiscriminate use of the external call and paying the call fee of the partner company. There was a problem.

Recently, users making international calls using a prepaid card system are gradually increasing. When a mobile caller calls a called party through a mobile communication switch, a prepaid card system and a call relay company, Having paid all the prepaid card call fees, it was difficult to secure competitiveness.

Accordingly, an object of the present invention is to enable a low-cost service when making a call through a private mobile communication service system and a mobile communication company using a prepaid card.

Another object of the present invention is to recognize the prepaid card information such as the telephone number, prepaid card number and balance information of the mobile communication terminal based on the private identification number in the private mobile communication service system to enable a call with a minimum key press. .

Another object of the present invention is to provide a call service between a terminal of a private exchange such as an extension telephone or an IP phone or PC (PC) soft phone in a private mobile communication service system and a mobile communication terminal of a private mobile communication service system.

The objects of the present invention are not limited to the above-mentioned objects. Other objects and advantages of the invention will be more clearly understood by the following description.

The present invention for achieving the above object,

Registering as a user of a mobile communication terminal of a private mobile communication service system in a general mobile communication service;

Registering the prepaid card information in a prepaid card system connected to a private mobile communication system (pBSC) by the user of the private mobile communication terminal;

Requesting, by the private mobile communication terminal user, an outgoing call from a private mobile communication system (pBSC) with a counterpart room;

Transmitting, by the private mobile communication system (pBSC), the prepaid card information including the identification number (identification number) of the private mobile communication terminal and the counterpart call number (telephone number) to the prepaid card system through a private exchange;

The prepaid card system is configured to perform a call connection to the call destination number through a call relay device (call connection equipment such as a trunk line exchanger, GK, GW, etc.) based on the prepaid card information; The prepaid card call method of the private mobile communication service system is a problem solving means.

Another invention for achieving the above object is,

A mobile communication service system;

Provide a call service between the terminal of the private exchange and the private mobile communication terminal of the private mobile communication service system, and based on the identification number (identification number) of the private mobile communication terminal, the telephone number, prepaid card number and balance information of the mobile communication terminal. A private mobile communication service system for recognizing prepaid card information such as such that a call can be made with a minimum key press;

When the call connection to the call provider is implemented in the trunk line system and the IP system (or VoIP system), the gatekeeper is connected by connecting the trunk line through the media gateway, authenticating the user in the AAA authentication server, and implementing the billing deduction in the billing system. A prepaid card system for connecting prepaid phones to the cheapest operators;

Call prepaid card system of the private mobile communication service system, characterized in that it comprises a; the call relay equipment for connecting the prepaid card system and the terminal of the call to the problem solving means.

The present invention has an effect that can be used at a lower cost when making a call through a private mobile communication service system and a mobile carrier using a prepaid card.

In addition, the present invention in the private mobile communication service system to recognize the prepaid card information, such as the telephone number, prepaid card number and balance information of the mobile communication terminal based on the private identification number to make a call by pressing a minimum key. There is an effect that convenience is provided.

In addition, the present invention can provide a call as a prepaid card service between a terminal of a private exchange such as an extension phone or an IP phone or PC (PC) soft phone in a private mobile communication service system and a mobile communication terminal of the private mobile communication service system. It works.

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

1 is a block diagram of a prepaid card call service system of a private mobile communication service system according to the present invention. As shown therein, the mobile communication service system 100, the private mobile communication service system 200, and a prepaid card system are shown. 300, the call relay equipment 400, and the call destination terminal 500.

2 and 3 are flowcharts of a prepaid card call method of a private mobile communication service system according to the present invention.

1 to 3, first, a user of a mobile communication terminal 101 uses a mobile communication base station 102, a mobile communication repeater 103, and a mobile communication exchange 104 on a mobile communication service system 100. Register the private mobile communication system with the home location register 105 through.

 In addition, the user of the mobile communication terminal 101 through the mobile communication base station 102, mobile communication repeater 103, mobile communication exchange 104 of the mobile communication service system 100, the private mobile communication service system ( The prepaid card information is registered by connecting to the prepaid card system 300 through the private mobile communication system 202 and the private exchange 203 of the 200. The registration information is a database 310 of the prepaid card system 300. )

The user of the mobile communication terminal 101 does not use the mobile communication service system 100 as described above, but the private mobile communication base station 201, the private mobile communication system 202, and the private mobile communication service system 200. Prepaid card information may be registered by connecting to the prepaid card system 300 through the private exchange 203.

Thereafter, when the user of the mobile communication terminal 101 requests the outgoing call with the other party to the private mobile communication service system 200, the private mobile communication system 202 of the private mobile communication service system 200 becomes private. The prepaid card information including the identification number (identification number) of the mobile communication terminal and the other party's call number (telephone number) are transmitted to the prepaid card system 300 through the private exchange 203.

Therefore, the user of the mobile communication terminal 101 presses a number of times much less than when using a prepaid card.

On the other hand, if it is determined that the prepaid card system 300 checks whether there is a remaining balance based on the prepaid card information, the other party is connected to the call relay equipment (call connection equipment such as a trunk line exchanger, GK, GW, etc.) 400. Send the call number.

At this time, when a connection number is received from the call target terminal 500 to the call relay equipment (call connection equipment such as a trunk line exchanger, GK, GW, etc.), the mobile communication terminal 101 and the call target terminal 500 Domestic or international telephone call calls are connected between each other to make a call.

When a public line network (such as PSTN and PSTN series PRI / R2) is connected to the media gateway 303 of the prepaid card system 300, authentication of a user is authenticated by AAA (AAA) authentication server 302. Received from the billing system 307 implements billing deduction while attempting to connect to the call provider.

If the call connection to the call provider is implemented in an IP system (or VoIP system), the trunk line is connected through the media gateway 303 to authenticate the user in the AAA authentication server 302 and then the billing system ( In 307, the billing deduction is implemented, and the prepaid phone is connected to the cheapest operator by the gatekeeper 301.

In addition, when the call connection to the call provider is implemented in the CO line system, the CO line is connected through the switch system 303 to authenticate the user in the AAA authentication server 302, and then billing in the billing system 307. While implementing the deduction connects the prepaid phone to the call relay equipment (400).

General switch equipment takes a lot of line costs that can be accessed at once when not IP, but the line cost is low when using the gatekeeper 301 of VoIP.

For reference, the function of the media gateway 303 is the same as that of the switch system, and there is a difference between simply mounting the media board as a PSTN board or a VoIP board.

Meanwhile, an embodiment of a communication service according to the present invention will be described with reference to FIGS. 4 to 7.

Figure 4 shows a wireless inbound / outbound service in the premises. The external call ① is connected to the public line network PSTN through the private switch 203 similarly to the premises landline telephone. External incoming (①) is a call drawn through the private exchange 203 can be wired and wireless simultaneous incoming. On-premises outgoing (②) is the interconnection within a private mobile communication zone for wireless ↔ wired and on-premises telephone calls.

Looking at the billing processing at the outgoing, the external outgoing or incoming (①) in the case of using the private exchange 203, all will be spent by the company in the same way as the existing premises wired use. However, in the case of the outgoing premises (②) is the same as the premises telephone, it is free of charge in the same way as when using the existing premises wire.

5 shows a short message service (SMS) via an internal network (intranet). The SMS route of ① transmits a short message to a wireless terminal through a PC in the premises, or sends a short message by accessing a call manager using a PC in a premises, or checks group broadcasts and results in real time (eg, meeting convocation notification, management information notification). This is a route to inform users of failures, failures of facilities, and messages during meetings.

The SMS route in ② is the route when calling from outside when the company's IP connection is possible (there is no firewall).

The SMS route in ③ is a route for calling an external mobile phone, and the SMS software should be modified, in which case the cost per message is added.

6 shows a data service using an on-premises network. ① route is provided free of charge as a route to provide data services to PDAs and notebook computers in conjunction with the Internet service in the premises. The path of ② is a path provided to all paid services except the service using the access code. For this purpose, data linkage between the premises server and the private mobile communication system should be performed.

Figure 7 shows the location of the terminal to provide call tracking and short message transmission service. Tracking service of ① shows automatic connection to public network in case of no wired / wireless response in outside premises. The tracking service of ② indicates that the user can receive a message as soon as he enters the premises if he is not in the premises SMS.

The function of each part of the prepaid card system 300 will be described in more detail as follows.

The media gateway 303 is a device for voice processing on the Internet, and is a device for converting and transmitting PCM voice data received through a public line network (PSTN) into an IP packet. In addition, the media gateway 303 supports the world standard H.323.

The media gateway 303 has the same function as the switch system of the PSTN unless it is connected using H.323 v3 of the IP part.

In addition, by supporting IVR to provide various services, important functions such as voice guidance, multilingual support, and balance guidance can be obtained at maximum cost with minimum cost. In addition, the media gateway 303 supports a remote management protocol SNMP v2.0 for CDR transmission and management convenience after the call, and is also operated separately as a network / operation management program.

The media gateway 303 satisfies the standard protocol and various functions required by the customer, and is a solution suitable for both a carrier and a separate operator, and has the following characteristics.

It has excellent call quality, excellent compatibility with world standard protocol, T.38 real time fax support, various additional functions, operation and maintenance.

As the various additional functions, the priority can be set according to the maximum number of digits when there is a routing table for the same number, a channel block / unblock function, a port, and a DSP resource assignment control. assignment control (LAN) function, local area number (LAN) automatic setting when using local termination, end digit recognition to minimize PDD, call restriction to specific station number or number There is a code checking function for incomplete calls.

As the operation and maintenance function, CDR generation function such as collecting CDR data, listen code for incomplete code, CDR processing and transmission, simultaneous transmission of CDRs to two servers, and port generation For example, there are port management functions, processor monitoring functions, etc., which can change status information, output and mask functions, routing information, and call setup data.

More detailed functions of the media gateway 303 are as shown in the tables of FIGS. 1 and 8.

SS7 Signaling Gateway 304 is a common-line signaling protocol that has a very broad standard specification. The SS7 Gateway is divided into North American and European standards worldwide. Similarly, call setup speed and line utilization can be increased simultaneously. Of course, many additional services such as AIN and Number portability are also very important. The call processing method with the media gateway 303 uses a proprietary proprietary protocol called SS7 over IP. This can be regarded as a kind of IP tunneling for SS7 ISUP. In addition to basic call processing, considerations for redundancy are also perfected to enable uninterrupted call processing.

Interworking regarding the SS7 gateway 304 and the media gateway 303 can be easily understood by referring to FIG. 5. Signal Transfer Point (STP) aims to exchange signal data and relay between other STPs. The SS7 gateway 304 connects to the A or F link from the STP to process the ISUP and sets up a call with the media gateway 303 to IP (see Figs. 9 and 10).

The SS7 gateway 304 is designed in a distributed architecture structure so that two or more systems can be connected through Ethernet or serial. This architecture reduces the load by distributing the SS7 stack software across multiple servers and is designed to operate on a single or multiple CPU. The advantage of this feature is that it shares the load between platforms and allows multiple platforms to operate with a single STP (see Figure 11).

The SS7 gateway 304 is an SEP, and a network provider connects a plurality of soft switches or media gateways 303 as a single point code even though they are separated from each other locally. can do.

The SS7 gateway 304 supports an onboard protocol conversion function to support various SS7 variants without changing boards. This provides a very important benefit in terms of cost reduction.

The high-performance SS7 Gateway 304 is flexible to scale, whether distributed or not, and supports up to eight links.

The stability of signaling equipment is essential to maintaining high service levels, and the technical requirement to achieve this is redundancy. SS7 gateway 304 has a complete HA structure. The HA architecture handles the load of the other server in the event of an equipment failure or a link failure, so that the two servers are either active or active and standby (see Figure 12).

According to the ITU-T H.323 Recommendation, gatekeeper 301 is an optional system. Provides call control services to H.323 endpoints. One or more gatekeepers 301 are installed to communicate with the respective servers, and there are no special criteria for network configuration. In other components of H.323, gateways or terminals are logically separated, but in a physical configuration they can be mounted on a server.

The gatekeeper 301 provides the following services.

The gatekeeper 301 provides an address translation service that translates an alias address into a transport address. This typically refers to a translation table, which is updated each time an endpoint is registered.

The gatekeeper 301 provides an admissions control service for granting network access through ARQ / ACF / ARJ H.225.0 messages. The gatekeeper 301 manages call authorization, bandwidth, and the like.

The gatekeeper 301 provides a bandwidth control service that permits the endpoint the necessary bandwidth using BRQ / BRJ / BCF messages.

The gatekeeper 301 provides a zone management service that provides the above functions to the terminal, the MCU, and the gateway.

The gatekeeper 301 provides a call control signaling function, which is not an essential function. Q.931 can be controlled using the call control signaling function according to the policy set by the administrator, and there are routed and directed methods.

The gatekeeper 301 may block illegal calls by performing authentication for each received call or perform a call authorization service according to various other service policies.

The gatekeeper 301 may provide a bandwidth management service that appropriately grants or rejects bandwidth to be used by an endpoint for a voice call according to QoS policy.

H.323 is a standard VoIP protocol recommended by the ITU, and if the gateway or gatekeeper 301 supporting it is not satisfactory in terms of stability and performance, smooth service in a real service becomes very difficult. The CMC3000 has been designed to follow standard recommendations and provide satisfactory performance and functionality for operation, management, and service in H.323 networks.

Gatekeeper 301 allows Enterprise Phone to Phone Service, IP to Web Service, and Carrier Grade H.323 Network Service. Becomes possible.

In addition, various service models and functions can be provided by diversifying the application. The basic functions are all based on H.323, so they are highly compatible. In particular, H.323 v3 support, endpoint load balancing, endpoint backup, routing restrictions, and inter zone routing are very helpful for services. It also provides user authentication and billing information, and supports RADIUS, a standard authentication protocol.

Subscriber authentication and billing information transmission function is compatible with the AAA authentication server 302, the performance is excellent and the reliability is guaranteed. In addition, it supports both CLI (Command Line Interface) and SNMP for convenient management and operation, and allows administrators to quickly and easily receive call statistics, system statistics, and status reporting.

The gatekeeper 301 authenticates the terminal by interworking with the AAA authentication server 302 with the H.323 ID and the E.164 of the terminal through GRQ and RRQ. The gatekeeper 301 authenticates whether a call is available to the calling terminal at ARQ and at SETUP. The gatekeeper 301 monitors the call when it is registered in the prepaid service of the calling terminal. When the call time expires, the gate keeper 301 may end the call forcibly. The gatekeeper 301 may change the incoming call for three situations: Always, Busy, and No Answer. The gatekeeper 301 generates the CDR basic data for the call and records it in a file, and transmits it to the AAA authentication server 302. The gatekeeper 301 cooperates with the AAA authentication server 302 using the standard protocol RADIUS protocol.

The gatekeeper 301 checks outgoing information at the time of incoming ARQ and at the time of setup, and provides an illegal call blocking service that immediately rejects unidentified information. The gatekeeper 301 may support a Supported Prefix item of the gateway, use a routing file configured as a file, and determine routing information through the AAA authentication server 302. The gatekeeper 301 sets up routing in a variety of ways to facilitate routing management. The gatekeeper 301 has interworked with terminals supporting various H.323 and is currently in service. The gatekeeper 301 works with HP's OCMC and Cisco products. The operating state of the gatekeeper 301 can be monitored and set through a command line interface (CLI).

In addition, the gatekeeper 301 supports its own OA & M protocol and can be managed through SNMP. Sending a GRQ message with the MAC address sends information to the gatekeeper 301 to be used in future with the AAA authentication server 302. Sending RRQ message with MAC address allocates H323 ID and E164 to be used in conjunction with CTA3000.

In order to provide stable service, the gatekeeper 301 is installed in a redundant structure, and each of the primary and the secondary gatekeepers is set to be active and standby. In the event of a failure of the first active server, all TAs are re-registered as standby, after which all services are equally provided (see Figure 13).

AAA is an authentication authorization accounting initial function that restricts a user's access to a network server service and provides a limited service to the user after access.

The meanings of authentication, authorization, and accounting are as follows.

Authentication is a process of verifying a user before providing a service to a user connected to a NAS (Network Access Server). When a user connects to the NAS, the NAS requests authentication for the user from the AAA authentication server 302, and the AAA authentication server 302 retrieves the information in the database 310 and accepts or rejects the result. Reject). Required items when requesting authentication include a PIN and a password, and may be encrypted for security.

 Authorization (Authorization) is a process in which the AAA authentication server 302 delivers to the NAS a set of attributes representing the details of the authorizations authorized to the authenticated user. The information contained in these attributes is information about a user in the database 310, and includes information such as details of possible services and restrictions that can be provided to the user.

Accounting tracks the services and usage used by users who are authorized to use the service after authentication, and collects information that can be used for billing, settlement, and reporting each time the service starts and ends. It is a process. The items to be entered depend on the service, and can mainly include the start and end times of the service, the sender's number and the recipient's number, the number of packets or bytes used, and more.

The advantages of using AAA are:

Using AAA gives you the flexibility to build a variety of network configurations, and allows you to set up policies to centrally manage your network, thus simplifying the control of managing your network from one place.

AAA is extensible to simply plug into an existing network without changing the network configuration, and it can also be integrated with other authentication systems. In addition, the use of AAA can complement or add to existing network security features.

AAA uses protocols such as RADIUS, TACACS +, and Kerberos. By using these standardized authentication methods, AAA has the advantage of being able to interoperate with devices produced by different vendors. In particular, the RADIUS protocol is an industry standard and most remote access devices support RADIUS.

AAA authentication server 302 uses the RADIUS protocol as the server responsible for authentication and CDR recording, and supports all the recommendations of the RADIUS protocol. It is also a flexible system that can be used not only as part of CCCP but also as an AAA system in a customer's existing network. The AAA provides interoperability with the database to provide enhanced features and capabilities that are distinct from existing RADIUS servers using the file system or ODBC (see Figure 14).

Looking at the features of AAA, it provides a fast and stable function in conjunction with the most widely used and proven database system (DB) in the world. It has a very fast authentication speed of about 10ms on average per call. Supports a prepaid calling card in conjunction with the billing system (307). In line with global trends, it supports global roaming services that allow you to call from a single PIN anywhere in the world. Prevent duplicate logins through the list of active sessions. Emphasis was placed on stabilizing the system with a redundant structure of servers to overcome failures. SNMP function is supported. By providing Telnet based management module, it is possible to manage services in remote locations.

AAA operations include authentication, authorization, and accounting operations.

In describing the authentication operation, when an Access-Request packet including user information such as User-Id and Password is received from a client such as a gateway or a gatekeeper, the AAA authentication server 302 first registers. It checks whether the client is a registered client, searches the DB with the shared key, User-Id, and encrypted password, and performs the authentication process. If all conditions are met, Access-Accept is returned to the client, and if any of the conditions are not met, a reject is sent (see Figure 15).

Referring to the authorization operation, when the AAA authentication server 302 sends back an access-accept in the authentication process, the authorization verification process is also simultaneously processed. The authorization verification process is performed by sending the service authorization information stored in the DB and the environment information for the service provision in the access-accept packet. Since the AAA authentication server 302 contains the authorization information in the access-accept packet sent to the client, the authentication process and the authorization verification process are not separated.

Accounting behavior is the process of recording CDRs, including billing-related information, including when, where, how long, and how long the user logged on at the beginning and end of a call. Record it. First, when the client starts and terminates the service, the foregoing information is sent to the AAA authentication server 302 in an accounting-request packet, and the AAA authentication server 302 is a registered client. After checking if there is no branch, record the relevant item in DB and return response if the record is successful. The RADIUS client module is installed in the gateway and the gatekeeper 301 so that an authentication method supporting the RADIUS standard can be used by simply selecting an option (see FIG. 16).

Main functions of AAA are user authentication (PIN, ANI, Mac Address), gate address assignment after MAC address authentication, CDR transfer, call back service, call forwarding service, memory dial There is a service (Memory Dial Service).

The billing system 307 is a program that is responsible for billing in the prepaid card system and the main carrier system. Billing system 307 is an essential function for billing such as customer management, prepaid card management, customer settlement, partner settlement management, gatekeeper and gateway information management, call routing, etc. To provide them.

FIG. 17 is a diagram illustrating an embodiment of a screen for checking a method and information for using a prepaid card using a data network of a private mobile communication service according to an embodiment of the present invention based on the billing system. Prepaid card type, expiration date, remaining charge, remaining time, card change, country-specific charge check, prepaid card usage information, card charging information, etc. can be displayed.

The billing system 307 has a database-based settlement with a strong control function, a customer management system, a multiple settlement function and an error recovery function, and is suitable for large businesses such as ITSP or telephone service providers.

Above all, real-time billing is possible, various discount policies and customer rates can be differentiated, and day / time zone discount policies can be set differently by country or region, and the interface of web environment Also supports.

The most powerful function of billing system 307 is to support various marketing policies desired by the operator. Service providers can establish various policies to diversify their marketing strategies. The billing system 307 is a billing system developed based on an Oracle RDBMS. Oracle's RDBMS is recognized worldwide for its stability and speed, making it the best database for billing. The billing system 307 is composed of a client program, an Oracle server, an Oracle table structure, a trigger, and the like.

Functions and capabilities of the billing system 307 are as follows.

There are various customer management functions, such as new customer registration, modification, search, deletion, authentication, termination, creation and output of notices for dispatch, use of Caller ID and PIN, pause of unpaid customer service, Export to other file types of files (Excel, Word, Text, MDB, etc.), delinquent and bad customer management, immediate settlement for late customers, and the ability to search for customers on various conditions.

There are prepaid (calling) card management functions, for example, automatic new card management function, issuance card and usage status management function, expiration date management function, card reissue function after expiration date and exhausted card search, application on the web Card issuance and management functions, and the function of storing the retrieved file in a different file format.

There is a customer settlement management function, for example, integrated settlement function and receipt management for the use of multiple services by one person, advance payment, non-payment management, recalculation, reissue function, and customer term settlement function.

There is a settlement function between the operators, for example, the settlement period setting management function between the operators, incoming charge settlement and collection management, outgoing charge payment management function.

There is a policy setting management function, for example, time-of-day discount and rate setting, and routing setting function.

There is a roaming service function, which includes AAA Systems support, settlement and storage management function, roaming usage statistics function, and application for roaming service application if AAA is not supported.

There are security functions, such as department management, module authority management by module and function, and user authority management.

There are agency management functions, for example, CDR management function, billing management function, inter-entry settlement function, invoice generation and sending function, settlement period arbitrary setting function, call origination charge settlement, roaming settlement function, outgoing call settlement, roaming settlement Functions, payment and receipt management between businesses, and storing search data in different file formats.

There is a function to settle customers 'bills, for example, registered customers' settlement and bill printing function, various settlement time setting function for each customer, bill storage management function, search and inquiry of unpaid customers, automatic payment of previous month and overdue interest, next month And balance management function, daily storage status and customer storage report function, and various search functions of registered customer usage status (CDR).

There are statistics management functions, for example, the usage status and daily subscription status management function by customer, time / day usage status and CDR analysis function by time period, outgoing call status search function by period, incoming call status search function by period, graphic statistics of search data Environment setting function.

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and may be implemented in various embodiments based on the basic concept of the present invention defined in the following claims. Such embodiments are also within the scope of the present invention.

1 is a block diagram of a prepaid card call service system of a private mobile communication service system according to the present invention;

2 and 3 is a flow chart of a prepaid card call method of a private mobile communication service system according to the present invention.

Figure 4 is an exemplary diagram of the premises wireless incoming / outgoing service according to the present invention.

Figure 5 is an illustration of a short message service via the premises network according to the present invention.

6 is an exemplary diagram of a data service using a premises network according to the present invention;

Figure 7 is an illustration showing the location of the terminal to provide a call tracking and short message transmission service according to the present invention.

8 is a table showing the main functions of the media gateway.

9 is an interlocking diagram of an SS7 and a media gateway.

10 is a flow chart of ISUP call setup.

11 is an SS7 gateway distributed architecture.

12 is a HA conceptual diagram.

13 is a conceptual diagram of redundancy of a gatekeeper.

14 is a configuration diagram of the connection between the AAA server and other equipment.

15 illustrates an authentication operation.

Figure 16 is an illustration of an account management operation.

FIG. 17 is a diagram illustrating an embodiment of a screen for checking a method and information for using a prepaid card using a data network of a private mobile communication service according to an embodiment of the present invention.

*** Description of the symbols for the main parts of the drawings ***

100: mobile communication service system 200: private mobile communication service system

300: prepaid card system 400: call relay equipment

500: call target terminal

Claims (7)

Registering as a user of a mobile communication terminal of a private mobile communication service system in a general mobile communication service; A second step of registering the prepaid card information in a prepaid card system connected to a private mobile communication system (pBSC) by the private mobile communication terminal user; A third step of requesting, by the private mobile communication terminal user, an outgoing call from a private mobile communication system (pBSC) with a counterpart; A fourth step of the private mobile communication system (pBSC) transmitting the prepaid card information including the identification number (identification number) and the counterpart call number (telephone number) of the private mobile communication terminal to the prepaid card system through a private exchange; : A fifth step of receiving, by the prepaid card system, the prepaid card information and performing a call connection to the call destination number through a call relay device (co-op exchanger, GK or GW) based on the prepaid card information; Prepaid card call method of a private mobile communication service system characterized in that comprises a The method of claim 1, wherein in the fifth step, when the prepaid card system receives the prepaid card information, the prepaid card information is checked and routed to the call destination number based on the identification number (identification number) of the private mobile communication terminal. Prepaid card call method of a private mobile communication service system, characterized in that. Mobile communication service system; Provide a call service between the terminal of the private exchange and the private mobile communication terminal of the private mobile communication service system, and based on the identification number (identification number) of the private mobile communication terminal, the telephone number, prepaid card number and balance information of the mobile communication terminal. A private mobile communication service system for recognizing prepaid card information such as such that a call can be made with a minimum key press; When the call connection to the call provider is implemented in the trunk line system and the IP system (or VoIP system), the gatekeeper is connected by connecting the trunk line through the media gateway, authenticating the user in the AAA authentication server, and implementing the billing deduction in the billing system. A prepaid card system that connects prepaid phones to the cheapest providers; Call relay equipment for connecting the prepaid card system and a terminal to be called; Prepaid card call system of a private mobile communication service system characterized in that comprises a 4. The prepaid system of claim 3, wherein the prepaid card system comprises one or more gatekeepers for providing call control services to H.323 endpoints to communicate with respective servers. Card call system. 4. The prepaid card system of claim 3, wherein the prepaid card system includes an AAA authentication server for restricting a user's access to a service of a network server and providing and managing a limited service to the user after access. Prepaid card call system of private mobile communication service system. 4. The prepaid card system of claim 3, wherein the prepaid card system is a device for voice processing on the Internet, and comprises a media gateway for converting and transmitting PCM voice data received through a public line network (PSTN) into an IP packet. Prepaid card call system of a private mobile communication service system. The prepaid card call system of claim 3, wherein the prepaid card system comprises a prepaid card system and a billing system in charge of billing in a main communication service provider system.

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