KR20090043274A - System and method for transmitting short message using small-size base station - Google Patents

Abstract

The present invention relates to a short message transmission system and method using a small base station.

The present invention receives the SMS service processing request message, requests the location information of the destination terminal to receive the destination terminal location information including the destination service area identification information, and then the calling terminal location information and the destination terminal location information including the originating service area identification information. Compare the location information and set the billing method information to either free or discount according to whether the calling terminal location information and the destination terminal location information match or set to general billing, and then send the billing method information to the SMS connection message. It provides a short message transmission system using a small base station, characterized in that it comprises a service control device.

According to the present invention, when the calling terminal and the called terminal are located within the coverage of the small base station, since the charge for the short message transmitted by the calling terminal to the called terminal is free or discounted, an increase in the number of users using the small base station is expected. Can be.

Small base station, femtocell, short message, free, discount, coverage

Description

System and Method for Transmitting Short Message Using Small-Size Base Station}

The present invention relates to a short message transmission system and method using a small base station. More particularly, the present invention relates to a system and method for free processing or discounting short message transmission between an originating terminal and a terminating terminal located within the coverage of a small base station.

As the use of mobile communication services is becoming more common, each mobile service provider is making great efforts to improve call quality of mobile communication services, such as installing a repeater in a shaded area.

In recent years, by replacing femtocell, a small base station equipment with its own capacity, in the home or office instead of the indoor repeater that was in charge of radio relay, it is possible to improve the coverage of mobile communication service and expand the bandwidth. It is drawing attention as a wired / wireless integrated service method.

The small base station is connected to the existing mobile communication network through the Internet line to form a coverage of the small indoor base station itself, and it is expected that the service quality will be improved by eliminating the shadow area and various additional services may be implemented in the base station area. have.

Additional services that can be provided using a small base station include voice calls between the caller and the receiver located within the coverage of the small indoor base station, such as a regional-based virtual private network service that conventionally provides free or discounted calls between the caller and the called party located in a particular area, It is expected to provide services such as multimedia messaging system (MMS), short message service (SMS) and free or discounted packet data transmission and reception, but no specific service plan has been established. Therefore, the service plan for this situation is required.

In order to meet the above-described needs, an object of the present invention is to provide a system and method for free processing or discounting short message transmission between an originating terminal and a terminating terminal located within the coverage of a small base station.

In order to achieve the above object, the present invention provides a system for transmitting a short message originating from a calling terminal to a called terminal, comprising a small base station connected to a base station controller through an internet line to form its own coverage. When the short message, the calling terminal identification number, and the called terminal telephone number are received from the calling terminal, the SMS (Short Message Service) service processing request message including the calling service area identification information is transmitted, and when the routing information request message is received, the destination switching center address is received. Transmits a routing information response message including information, and when a destination location information request message is received, transmits a destination location information response message including destination service area identification information, and receives the SMS connection message including billing method information; SMS sent message A mobile communication network for transferring, including; Storing the small base station service subscriber information, receiving the SMS service processing request message, confirming that the calling terminal is located within the coverage of the small base station, and requesting the location information of the called terminal to include the called service area identification information. After receiving the called terminal location information, the calling terminal location information including the calling service area identification information and the called terminal location information are compared to determine the charging method information according to whether the calling terminal location information and the called terminal location information match. A service control device which transmits the billing method information in the SMS connection message after setting to one of free or discount or general billing; When the location information is requested from the service control device, the routing information request message and the called location information request message are transmitted to the mobile communication network to receive the routing information response message and the called location information response message. A location information inquiry server which generates terminal location information and transmits the location information to the service control apparatus; And after receiving the SMS sending message, transmits the short message to the called terminal, and if the charging information is set to free or discounted, the transmission fee of the short message is free or discounted. If it is set to the general billing provides a short message transmission system using a small base station, characterized in that it comprises an SMS center for processing the transmission fee as a general billing.

In addition, according to another object of the present invention, in the method for transmitting a short message originating from the calling terminal to the called terminal, (a) transmitting the short message, calling terminal identification number and called terminal number from the calling terminal to the mobile communication network; Doing; (b) transmitting a short message service (SMS) processing request message including source service area identification information to a service control device in a mobile communication network; (c) the service control device confirms whether the calling terminal has joined the small base station service and the calling location, and requests a location information inquiry server for the location information of the called terminal to receive the called terminal location information including the called service area identification information. Receiving from a location information inquiry server; (d) determining, by the service control device, whether or not the calling terminal location information including the calling service area identification information matches the called terminal location information; (e) setting the charging method information as free or discount if the calling terminal location information and the called terminal location information in step (d) match; (f) setting the charging method information to general charging if the calling terminal location information and the called terminal location information do not match in step (d); (g) transmitting the charging method information to the mobile communication network by including the charging method information in an SMS connection message; And (h) transmitting the SMS transmission message including the charging method information and the short message to an SMS center in the mobile communication network.

As described above, according to the present invention, when the calling terminal and the called terminal are located within the coverage of the small base station, the fee for the short message sent by the calling terminal to the called terminal is free or discounted. The increase in users can be expected, and the lock-in effect of subscribers can be expected through the provision of new additional services using small base stations.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram schematically showing the configuration of a system according to a preferred embodiment of the present invention.

A system according to a preferred embodiment of the present invention comprises a calling terminal 112, a called terminal 114, a mobile communication network 120, a small base station 122, a base station controller 124, an exchange station 126, a home location register 128 ), A service control device 130, a location information inquiry server 140, a Short Message Service (SMS) center 150, and a charging server 160.

The calling terminal 112 and the called terminal 114 are terminals that subscribe to a small base station service according to a preferred embodiment of the present invention. A personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, and a GSM (Global) System for Mobile (Wi-CDMA) phone, Wideband CDMA (W-CDMA) phone, CDMA-2000 phone, Mobile Broadband System (MBS) phone, Digital Multimedia Broadcasting (DMB) phone, and WiBro phone. Here, the small base station service is a transmission rate of the short message transmitted by the calling terminal 112 to the called terminal 114 when the calling terminal 112 and the called terminal 114 are located within the coverage of the small base station 122. Free or discounted service.

In the present invention, the calling terminal 112 sends a short message, and the called terminal 114 receives a short message sent from the calling terminal 112. In the present invention, if the calling terminal 112 and the called terminal 114 are located within the coverage of the small base station 122 to be described later, the calling terminal 112 is free or discounted for the transmission of the short message.

The mobile communication network 120 receives a short message between the calling terminal 112 and the called terminal 114 through data transmission / reception with the service control device 130, data transmission / reception with the location information inquiry server 140, and data transmission / reception with the SMS center 150. It performs the function of mediating the sending and receiving of messages.

In the present invention, the mobile communication network 120 includes a small base station 122, a base station controller 124, the switching center 126 and the home location register 128.

In the present invention, the mobile communication network 120 including the small base station 122 includes any one of an asynchronous network and a synchronous network.

The small base station 122 is connected to the base station controller 124 through an internet line to form a coverage of the small base station 122 itself.

In the present invention, the small base station 122 transmits when the source terminal 112 is located within the coverage of the small base station 122 when the power is connected or when the source terminal 112 enters the coverage of the small base station 122. The terminal 112 receives the connection request message sent to register the location and transmits it to the switching center 126.

The base station controller 124 performs a function for radio resource management of the mobile communication network 120 and a management function for the conventional base station and the small base station 122. Here, if the mobile communication system is synchronous, the base station controller 124 will be a base-station transmission system (BTS), and if the mobile communication system is asynchronous, the base station controller 124 will be a Radio Network Controller (RNC). will be.

In the present invention, when the originating terminal 112 transmits a connection request message to the switching center 126, the base station controller 124 transmits the cell ID information, the small base station ID information, and the base station controller where the originating terminal 112 is located. Send an initial terminal registration message (eg, Initial UE message) including the originating service area identification information, which is a service area identity (SAI) of the calling terminal 112 including the ID information, to the switching center 126. do.

The exchange 126 manages mobility of a mobile communication terminal, a wireless link or a wired link, and performs charging processing, system operation, interworking with other networks, and subscriber's incoming and outgoing call processing. Here, the switching center 126 includes any one of a mobile switching center (MSC) and a serving GPRS support node (SGSN).

In the present invention, when the exchange 126 receives the initial terminal registration message from the base station controller 124, it updates the location information of the calling terminal 112 stored in the home location register 128 to register the location of the calling terminal 112. After receiving the subscriber information insertion message including the small base station service subscriber information and Triggering Detection Point (TDP) information from the home location register 128, the small base station service subscriber information and the TDP information included in the subscriber information insertion message are received. Save it. Here, the TDP information triggers the intelligent network when the switching center 126 receives the short message.

Further, when the switching center 126 receives the short message, the calling terminal identification number, and the called terminal telephone number (for example, 010-1234-9876) at the calling terminal 112, the switching center 126 receives the calling terminal identification number. It is checked whether the calling terminal 112 is subscribed to the small base station service by checking the small base station service subscriber information. Here, the identification number includes a Mobile Identification Number (MIN) and an International Mobile Station Identity (IMSI), and the phone number includes a Mobile Directory Number (MDN) and a Mobile Station International ISDN Number (MSISDN).

If the calling terminal 112 is a terminal subscribed to the small base station service, the switching center 126 uses the TDP information to determine the cell ID and the small base station ID information where the calling terminal 112 is located in the SMS service processing request message (Initial DP SMS). And the originating service area identification information including the base station controller ID information is transmitted to the service control apparatus 130. Here, the SMS service processing request message includes the originating terminal identification number, the originating switching center address information, and the called terminal telephone number, which are previously defined parameters, in addition to the originating service region identification information.

On the other hand, when the exchange 126 receives the incoming location information request message from the location information inquiry server 140, it transmits the incoming location information response message including the destination service area identification information to the location information inquiry server 140. Here, the called service area identification information includes cell ID information, small base station ID information, and base station controller ID information where the called terminal 114 is located.

In addition, when the SMS connection message is received from the service control device 130, the charging method information included in the SMS connection message is included in the SMS transmission message (for example, Mo Forward SM message) and transmitted to the SMS center 150. . Here, the SMS sending message, of course, further includes the short message received from the calling terminal 112, the calling terminal identification number and the called terminal phone number in addition to the charging method information.

In the present invention, the charging method information is the charging method of the short message transmitted from the calling terminal 112 to the called terminal 114 is set to free or discount or set to general charging. For example, if the charging method information is "no-charging flag", if the charging method is free or discount, "no charging flag" is set to "1". If the charging method is general charging, the "no charging flag" is " 0 "may be set.

In the present invention, for convenience of explanation, the source and destination exchange stations are limited to the same exchange station 126, that is, the source terminal 112 and the destination terminal 114 are located in an area managed by one exchange station 126. In actual application, the present invention is not limited to this, and the originating exchange station and the destination exchange station may be different. If the originating exchange station and the destination exchange station are different, it means that the destination terminal 114 is not located within the coverage of the small base station 122.

The home location register 128 receives the location information of the mobile communication terminal including the calling terminal 112 and the called terminal 114 from the visitor location register (not shown) and performs functions such as registration recognition, registration deletion, and update. do. In addition, the home location register 128 stores profile information of the mobile communication terminal which is waiting for a call.

In the present invention, the home location register 128 receives and stores small base station service subscriber information from a CDS (Client Database Server) (not shown), and provides a free or discount service of a short message transmitted between terminals subscribed to the small base station service. Setting and storing Mobile Originated (MO) -SMS-CSI (CAMEL Subscription Information) information for intelligent network call processing for the purpose, and performing the location registration of the originating terminal 112 by the switching center 126, the small base station service A subscriber information insertion message including subscriber information and TDP information is sent to the switching center 126.

In addition, when the home location register 128 receives a Sending Routing Info message from the location information inquiry server 140, the routing information including the destination exchange address, which is the exchange address of the area where the destination terminal 114 is located, is received. The response message is transmitted to the location information inquiry server 140.

As described above, when the mobile communication network 120 including the small base station 122 receives the connection request message from the calling terminal 112, the mobile communication network 120 updates the location information of the calling terminal 112, and sends a short message from the calling terminal 112. Upon receiving the terminal identification number and the called terminal phone number, the service control device 160 transmits an SMS service processing request message to request the service control device 160 to process the SMS service.

In addition, when the mobile communication network 120 receives the routing information request message from the location information inquiry server 140, the mobile communication network 120 transmits a routing information response message including the destination exchange station address information to the location information inquiry server 140, and the location information inquiry server ( When receiving the called location information request message from 140, the called service area identification information, which is the service area identification information of the called terminal 114 including the cell ID information, the small base station ID information, and the base station controller ID information where the called terminal 114 is located. The destination location information response message including the transmission to the location information inquiry server 140.

On the other hand, when the mobile communication network 120 receives the SMS connection message from the service control device 130, the billing method information included in the SMS connection message is included in the SMS transmission message and transmitted to the SMS center 150.

When the SMS connection message is received from the service control device 130, the charging method information included in the SMS connection message is additionally included in the SMS transmission message (for example, Mo Forward SM message) and transmitted to the SMS center 150. .

The service control device 130 includes a service control point (SCP) that performs service control such as eligibility check of information received from a service exchanger (SSP) and translation of routing information.

In the present invention, the service control device 130 stores a small base station ID database in which a plurality of small base station ID information is stored in a database, and receives and stores small base station service subscriber information from a client database server (CDS) (not shown).

When the service control device 130 receives the SMS service processing request message including the outgoing service area identification information from the mobile communication network 120, the small base station ID information included in the outgoing service area identification information is information included in the small base station ID database. By confirming that, the originating terminal 112 confirms that it is located within the coverage of the small base station 122. Here, when the originating service area identification information does not include the small base station ID information and includes the conventional base station ID information, that is, when the calling terminal 112 is not located in the small base station coverage and is located in the conventional base station (not shown). The service control apparatus 130 confirms that the conventional base station ID information is not included in the small base station ID database, thereby confirming that the originating terminal 112 is not located within the coverage of the small base station 122, General charging may be applied to the short message transmitted by the 112 to the called terminal 114, or the short message transmission may be stopped.

On the other hand, the service control device 130 checks the destination terminal 114 is subscribed to the small base station service by comparing the destination terminal phone number included in the SMS service processing request message with the small base station service subscriber information, the location of the destination terminal Requests location information of the called terminal to the location information inquiry server 140 to determine whether the terminal is located within the coverage of the small base station 122, and receives the location information of the called terminal 114 as the location information of the called terminal 114. From 140. Here, the destination terminal location information includes the destination service area identification information and the destination exchange station address information.

The service control device 130 compares the calling terminal location information including the calling service area identification information and the calling switching center address information with the called terminal location information to match the calling terminal location information with the called terminal location information, that is, the called terminal 114 If the calling terminal 112 is located within the coverage of the small base station 122 in which the calling terminal 112 is located, the charging method information of the short message transmitted from the calling terminal 112 to the called terminal 114 is set as free or discounted, and the SMS connection message is set. Included in the transmission to the mobile communication network 120. Here, the source terminal location information is information obtained by combining the source service area identification information and the source switching center address information in the service control device 130.

On the other hand, the service control device 130, the caller terminal location information and the destination terminal location information is inconsistent, that is, the caller service area identification information and the destination service area identification information is inconsistent, and the caller terminal address information and the destination exchange station address information is inconsistent If the called terminal 114 is not located within the coverage of the small base station 122 where the calling terminal is located, including one or more cases, the charging method information of the short message transmitted by the calling terminal 112 to the called terminal 114 is transmitted. Set to general charging, including this in the SMS connection message and transmits to the mobile communication network (120).

In the present invention, using the exchange address information to determine that the calling terminal location and the called terminal location are located within the coverage of the small base station 122, the small base station ID information and the base station controller ID information may be duplicated for each switching station. In this case, it is to distinguish that the small base station ID information and the base station controller ID information are used in a specific switching center corresponding to the switching center address information.

The SMS center 150 is connected to the switching center 126 included in the mobile communication network 120 and performs a function of delivering a short message to mobile communication subscribers.

In the present invention, the SMS center 150 receives the SMS sending message from the mobile communication network 120.

The SMS center 150 transmits the short message included in the SMS sending message to the called terminal 114, and if the charging method information included in the SMS sending message is set to free or discount, the billing server 160 displays the short message. The transmission fee is free or discounted, and if the billing method information is set to general billing, the billing server 160 allows the short message transmission fee to be processed as the normal billing.

When the location information inquiry server 140 receives the location information of the destination terminal 114 from the service control device 130, the location information inquiry server 140 transmits a routing information request message to the mobile communication network 120 to provide a routing information response message including the destination exchange station address information. After receiving from the mobile communication network 120 and transmitting the incoming location information request message to the mobile communication network 120 to receive the receiving location information response message including the destination service area identification information from the mobile communication network 120, and then the destination service area identification The receiver terminal location information including the information and the destination exchange address information is transmitted to the service control apparatus 130.

The billing server 160 processes the transmission fee of the short message sent by the originating terminal 112 to the called terminal 114 for free or discounted or general billing.

2 and 3 are flowcharts illustrating a process of free or discount processing of a short message transmission according to an exemplary embodiment of the present invention.

When the calling terminal 112 transmits the connection request message to the mobile communication network 120, the mobile communication network 120 updates the location information of the calling terminal 112 (S205 and S210).

When the mobile communication network 120 receives the short message, the calling terminal identification number, and the called terminal telephone number from the calling terminal 112, the mobile communication network 120 transmits an SMS service processing request message including the calling service area identification information to the service control device 130. (S215, S220). Here, the SMS service processing request message includes the originating terminal identification number, the originating switching center address information, and the called terminal telephone number, which are previously defined parameters, in addition to the originating service region identification information.

When the service control device 130 receives the SMS service processing request message including the originating service area identification information from the mobile communication network 120, the service control device 130 confirms that the originating terminal 112 is located within the coverage of the small base station 122, and the called terminal ( After confirming that 114 is subscribed to the small base station service, the terminal requests location information to the location information inquiry server 140 (S225 and S230). Here, if the originating terminal 112 is not located within the coverage of the small base station 122, the service control device 130 allows the general terminal to be charged for the short message transmitted from the originating terminal 112 to the terminating terminal 114, or In this case, the short message transmission can be stopped.

The location information inquiry server 140, which has received the request for the location information of the called terminal, transmits a routing information request message to the mobile communication network 120 to receive a routing information response message including the address of the destination switching center from the mobile communication network 120, After receiving the destination location information request message to the destination location information response message including the destination service area identification information from the mobile communication network 120, the destination terminal location including the destination service area identification information and destination exchange station address information Information is transmitted to the service control device 130 (S235, S240, S245, S250, S255). Here, the called service area identification information includes cell ID information, small base station ID information, and base station controller ID information where the called terminal 114 is located.

The service control device 130 compares the calling terminal location information including the calling service area identification information and the calling switching center address information with the called terminal location information to match the calling terminal location information with the called terminal location information, that is, the called terminal 114 If the calling terminal 112 is located within the coverage of the small base station 122 in which the calling terminal 112 is located, the charging method information of the short message transmitted from the calling terminal 112 to the called terminal 114 is set as free or discounted, and the SMS connection message is set. Included in the transmission to the mobile communication network 120 (S260, S265). In this case, when the calling terminal location information and the called terminal location information are inconsistent, the charging method information of the short message transmitted from the calling terminal 112 to the called terminal 114 is set to general charging, which is included in the SMS connection message. Transmission to the mobile communication network 120.

The mobile communication network 120 receiving the SMS connection message from the service control device 130 transmits the SMS transmission message including the charging method information and the short message to the SMS center 150 (S270).

The SMS center 150 receiving the SMS sending message from the mobile communication network 120 transmits the short message included in the SMS sending message to the called terminal 114, and charges CDR according to the charging method information included in the SMS sending message. Call Detail Record) is generated and sent to the billing server, i.e., if billing method information is set to free or discounted, billing server 160 handles the free or discounted transmission fee of the short message, and billing method information is set to general billing. If set, the billing server 160 to process the transmission fee of the short message to the general billing (S275).

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, the present invention is applied to the small base station service field, and when the calling terminal and the called terminal are located in the coverage of the small base station, the charge for the short message transmitted by the calling terminal to the called terminal is free or discounted. Therefore, an increase in the number of users using the small base station can be expected, and it is a very useful invention that can expect the lock-in effect of the subscriber by providing a new additional service using the small base station.

1 is a block diagram schematically showing the configuration of a system according to a preferred embodiment of the present invention;

2 and 3 are flowcharts illustrating a process of free or discount processing of a short message transmission according to an exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

112: calling terminal 114: called terminal

120: mobile communication network 122: small base station

124: base station controller 126: switching center

128: home location register 130: service control device

140: location information query server 150: SMS Center

160: billing server

Claims (11)

In the system for transmitting a short message from the calling terminal to the called terminal, A small base station connected to the base station controller through an internet line to form its own coverage, and receiving the short message, the calling terminal identification number and the called terminal telephone number from the calling terminal, the SMS including the calling service area identification information ( Short Message Service) When the service processing request message is transmitted and the routing information request message is received, the routing information response message including the destination exchange address information is transmitted. When the receiving location information request message is received, the called location information including the called service area identification information is received. A mobile communication network which transmits a response message and includes the charging method information in the SMS sending message when receiving the SMS connection message including the charging method information; Storing the small base station service subscriber information, receiving the SMS service processing request message, confirming that the calling terminal is located within the coverage of the small base station, and requesting the location information of the called terminal to include the called service area identification information. After receiving the called terminal location information, the calling terminal location information including the calling service area identification information and the called terminal location information are compared to determine the charging method information according to whether the calling terminal location information and the called terminal location information match. A service control device which transmits the billing method information in the SMS connection message after setting to one of free or discount or setting to general billing; When the location information is requested from the service control device, the routing information request message and the called location information request message are transmitted to the mobile communication network to receive the routing information response message and the called location information response message. A location information inquiry server which generates terminal location information and transmits the location information to the service control apparatus; And After receiving the SMS sending message, the short message is transmitted to the called terminal, and if the charging information is set as free or discount, the transmission fee of the short message is free or discounted, and the charging method information is general. SMS center, if set to billing, to handle the transfer charges as normal billing Short message transmission system using a small base station comprising a. The method of claim 1, wherein the mobile communication network The base station controller for transmitting an initial terminal registration message including the originating service area identification information when registering the location of the originating terminal; Receiving the initial terminal registration message and receiving the short message, the calling terminal identification number and the called terminal telephone number from the calling terminal, sends the SMS service processing request message to the service control device, and the location information An exchange station that receives the called location information request message from an inquiry server, sends the called location information response message to the location information inquiry server, and transmits the SMS sending message to the SMS center upon receiving the SMS connection message; Store the small base station service subscriber information, transmit a subscriber information insertion message including the small base station service subscriber information to the switching center, and transmit the routing information response message to the location information inquiry server upon receiving the routing information request message. Home Location Register Short message transmission system using a small base station comprising a. The method of claim 1, The origination service region identification information includes cell ID (identification) information, small base station ID information, and base station controller ID information where the originating terminal is located, and the terminating service region identification information includes cell ID information where the called terminal is located. And a small base station ID information and a base station controller ID information. The method of claim 1, The source terminal location information further includes source switching station address information, and the location information further includes a destination switching center address information. The method of claim 1, And the SMS service processing request message further includes a calling terminal identification number, calling switching center address information and a called terminal telephone number. The method of claim 1, The service control device is a short message transmission system using a small base station, characterized in that for setting the charging method information free or discount if the calling terminal location information and the called terminal location information match. The method of claim 1, And the service control device sets the charging method information to general charging if the calling terminal location information and the called terminal location information do not match. In the method for transmitting a short message from the calling terminal to the called terminal, (a) transmitting a short message, a calling terminal identification number, and a called terminal telephone number at the calling terminal to the mobile communication network; (b) transmitting a short message service (SMS) processing request message including source service area identification information to a service control device in a mobile communication network; (c) the service control device confirms whether the calling terminal has joined the small base station service and the calling location, and requests a location information inquiry server for the location information of the called terminal to receive the called terminal location information including the called service area identification information. Receiving from a location information inquiry server; (d) determining, by the service control device, whether or not the calling terminal location information including the calling service area identification information matches the called terminal location information; (e) setting the charging method information as free or discount if the calling terminal location information and the called terminal location information in step (d) match; (f) setting the charging method information to general charging if the calling terminal location information and the called terminal location information do not match in step (d); (g) transmitting the charging method information to the mobile communication network by including the charging method information in an SMS connection message; And (h) transmitting, by the mobile communication network, an SMS sending message including the charging method information and the short message to an SMS center; The short message transmission method using a small base station comprising a. The method of claim 8, The origination service region identification information includes cell ID (identification) information, small base station ID information, and base station controller ID information where the originating terminal is located, and the terminating service region identification information includes cell ID information where the called terminal is located. And a small base station ID information and a base station controller ID information. The method of claim 8, And the calling terminal location information further includes calling switching center address information, and the called terminal location information further includes called switching center address information. The method of claim 8, (i) after receiving the SMS sending message at the SMS center, sending the short message to the called terminal, and if the billing information is set to free or discounted, to charge the short message transmission fee free or discount. If the charging method information is set to general charging, processing the transmission fee as general charging; The short message transmission method using a small base station, characterized in that it further comprises.

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