KR100960798B1 - System for providing short message service, method, and device therefor - Google Patents

Abstract

The present invention relates to a technology for transmitting and receiving a text message through the wired telephone network for the subscribers of intelligent network services accommodated in a public switching telephone network (PSTN).

To this end, the present invention is connected to the receiving terminal having a real phone number for the intelligent network user phone number included in the received text message and the call line in the state that the received text message by the FSK (Frequency Shift Keying) signaling method Send a message to the called terminal, receive a text message from the calling terminal in the FSK signaling mode while connecting the calling terminal and the call line, disconnect the call line, and then authenticate the text message by successfully authenticating the text message. Characterized in that configured to transmit to the called terminal.

Description

Character service providing system, method, and terminal thereof {SYSTEM FOR PROVIDING SHORT MESSAGE SERVICE, METHOD, AND DEVICE THEREFOR}

The present invention relates to a text service providing system, a method, and a terminal thereof, and more particularly, to send and receive text messages through a wired telephone network to an intelligent network service subscriber housed in a public switching telephone network (PSTN). It's about technology that makes it possible.

Wireline network providers provide intelligent network services using intelligent networks.

Examples of the intelligent network service include a representative number service, a free telephone service, and a paid information service. Each of the intelligent network services is classified as a prefix. The representative number service has a prefix of, for example, 1588, 1577, the toll-free service has a prefix of 080, and the like, and the pay information providing service has a prefix of, for example, 060 and 070.

The intelligent network service telephone number having the intelligent network service prefix is a virtually assigned telephone number given to the intelligent network service subscriber, and the actual telephone number that can be received by the intelligent network service subscriber is registered to the intelligent network service telephone number. Incoming call is connected to the actual telephone number.

On the other hand, the mobile communication network provider provides a SMS (Short Message Service) in addition to the voice call service, the text service to the called terminal corresponding to the called number when the calling terminal transmits the called number and the text (text) message The text message and the telephone number of the calling terminal are transmitted.

The text service has an advantage that the service charge is cheaper than that of the voice call service, and the text service can be easily transmitted to the called terminal. Currently, the text service server is not limited to a mobile communication network but is also serviced by a wire communication network provider. In the case of a wire communication network, a text service is provided for a wired terminal having a telephone terminal capable of transmitting and receiving text messages. . Accordingly, it is possible to send and receive text messages between the wired terminal of the wired telephone network and the wired terminal of the wired telephone network, or to transmit and receive the text message between the wired terminal of the wired telephone network and the mobile terminal of the mobile communication network.

On the other hand, since the text service transmits the text message frame to the called number stored in the text message frame including the text message, the text message is normally transmitted only when the called number is actually the called number. That is, if the called number stored in the text message frame is not an actual phone number but an intelligent network service phone number corresponding to the virtual number, the text message frame is lost by the text service server and cannot be transmitted to the actual called terminal.

Therefore, since it is not possible to send a text message using the intelligent network service telephone number as the called number instead of the actual telephone number, even if the calling terminal needs to send a text message to the intelligent network subscriber corresponding to the intelligent network service telephone number, the text message is required. The message could not be sent. This is a problem that can not satisfy the request of the intelligent network service subscriber to receive the user request from the customer through the text message, and the user's request to communicate their intention by sending the text message to the intelligent network service subscriber.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a text service providing system, a method, and a terminal for sending and receiving text messages through a wired telephone network to an intelligent network service subscriber accommodated in a wired telephone network. The purpose.

In the text service providing system according to the present invention, the incoming text message is received by the FSK signal in a state in which the incoming call terminal having the actual telephone number for the intelligent network user's telephone number included in the received text message is connected to a call line. Character service server for transmitting to the call, and when the request of the character service server, the call to the incoming terminal to connect the call line, characterized in that it comprises a switch to cut the call line when the text message transmission is complete.

In addition, the text service providing system according to the present invention is a switch that connects the call line between the calling terminal and the text service server, and receiving the text message from the calling terminal in a state in which the call line is connected and cut the call line Thereafter, characterized in that it comprises a text service server for authenticating the text message and transmits the successful text message to the called terminal.

The text service providing method according to the present invention comprises the steps of: (a) extracting a real phone number for the intelligent network representative phone number when a text message is generated using the intelligent network representative phone number as a called number; Calling and connecting the actual telephone number terminal and the call line, (c) transmitting the text message to the actual telephone number terminal through the call line in the FSK signaling method, and (d) transmitting the text message. Characterized in that it comprises the step of transmitting the text message transmission and reception information of the intelligent network representative phone number.

In addition, the text service providing method according to the present invention comprises the steps of: (A) receiving a text message from the calling terminal through the call line via the FSK signaling method when the calling terminal and the call line are connected, (B) the received text message Analyzing the text message and performing authentication on the text message; and (C) transmitting the text message to the called terminal when the text message is successfully authenticated.

The text service providing terminal according to the present invention transmits / receives a message for transmitting / receiving various signals for connecting a call line with a text service server and various messages for FSK signaling for transmitting and receiving a text message with the text service server, and a text to be transmitted. The character message input / output unit for receiving various information about the message and outputting the received text message, an authentication code generation unit for generating an authentication code using pre-stored encryption keys and nonce information, and a message transmission / reception unit for controlling the character Characterized in that a message input through the message input and output unit is characterized in that it comprises a control unit for performing the overall control to be transmitted to the text service server through the call line.

According to the present invention, an intelligent network service subscriber of a wired communication network can transmit and receive a text message through a call line of a wired communication network, thereby providing various services to an intelligent network service subscriber corresponding to a large customer.

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

1 is an overall configuration diagram of a text service providing system according to an exemplary embodiment of the present invention.

The text service providing system according to an embodiment of the present invention is an intelligent network service telephone number through a call line in conjunction with a TOLL switch 12, 14, 16, a local switch 20, and an SMS hosting device 40 built in a wired telephone network. It is provided with a text service server 10 so that the actual terminal corresponding to the text message can be transmitted and received.

Next, the operation of each component shown in FIG. 1 will be described in detail.

The local exchange 20 accommodates the SMS terminals 30 and 32 and the corporate customer SMS device 50, and upon request of the text service server 10, the text service server 10 and the SMS terminals 30 and 32 and the enterprise. It performs a function of performing a call processing so that the call line between the customer SMS device 50 is set.

The TOLL switches 12, 14, and 16 are voice E1 lines used in a public switched telephone network (PSTN), connected to the text service server 10, and connected to the local switch 20 and the E1 line to the local switch 20 ) And a call processing for a call line connection between the text service server 10. As shown in FIG. 1, the TOLL exchanger 14, 16 is connected to a local exchange 20, and the TOLL exchanger 12 is connected to any local exchange 20 not shown in the figure.

The text service server 10 connects the SMS terminal 30, 32, the corporate customer SMS device 50, the SMS hosting device 40 with the call line, and then sends a message defined by the FSK signaling method through the call channel. By transmitting and receiving, it performs a function of transmitting and receiving a text message with the SMS terminal 30, 32, the enterprise customer SMS device 50, and the SMS hosting device 40 corresponding to the actual destination number of the intelligent service telephone number. To this end, the text service server 10 builds a subscriber information database 11 storing subscriber information for the intelligent network service, and works with ICIS 4 to add / change / delete subscriber information for the intelligent network service subscriber. To perform.

The subscriber information database 11 of the text service server 10 includes a subscriber's intelligent network service telephone number, an actual incoming telephone number for receiving a text message of the intelligent network service subscriber, a caller list of the intelligent network service subscriber, and a subscriber type (hosting). Type, enterprise customer SMS device type, general terminal type), EID (Equipment ID) information for SMS hosting device or enterprise customer SMS device, encryption key information for each EID, NONCE for each SMS hosting device or enterprise customer SMS device It is desirable to store (Nunber Used Once Parameter) information and the like. In addition, when the subscriber type is a corporate customer SMS device, it is preferable to separately manage the telephone number of the corporate customer SMS device. For reference, the call number list managed by the text service server 10 is a list of phone numbers used to send a text message upon request of the SMS hosting device 40 or the enterprise customer SMS device 50.

On the other hand, the text service server 10 is equipped with a protocol with an encryption function to perform authentication for the SMS hosting device 40 or the enterprise-type SMS device 50.

The enterprise customer SMS device 50 installed in the wired communication network is a wired SMS (Short Message Service massage) transmission device installed at a subscriber (corporate customer) end to provide a service for sending and receiving text messages in bulk using an intelligent network service telephone number. In addition, the SMS hosting device 40 is a device that provides a hosting service for wired SMS transmission and reception so that entrepreneurs can be provided with a service for transmitting text messages using an intelligent network service phone number without an enterprise customer SMS device. The enterprise customer SMS device 50 and the SMS hosting device 40 are each assigned an actual telephone number and are managed by the text service server 10. In the present invention, the SMS hosting device 40 has a plurality of channels to host the SMS transmission and reception function of the company subscribers to perform the function of sending and receiving text messages through the exchange of messages of the FSK signaling method, the enterprise customer SMS device 50 is It is provided with a plurality of channels to perform the function of transmitting and receiving SMS through the message exchange of the FSK signaling method according to SMS transmission and reception through each channel.

The enterprise customer SMS device 50 of the present invention, as shown in Figure 2, a variety of signals for the call line connection with the text service server 10 and FSK signaling method for transmitting and receiving text messages with the text service server 10 Message transmission / reception unit 51 for transmitting and receiving various messages, text message input / output unit 53 for receiving a variety of information on text messages to be transmitted, and outputting received text messages, and unique EID (Equipment ID Parameter) information. Text message input / output unit 53 by controlling the stored EID information storage unit 54, the authentication code generation unit 55 for generating the authentication code using the pre-stored encryption key and NONCE information, and the message transmission and reception unit 51 It is provided with a control unit 52 for performing the overall control so that the text message input through the) is transmitted to the text service server 10 through the call line.

The message transmitting / receiving unit 51 transmits an ACK when a CAS (CPE Alerting Signal) is transmitted from the text service server 10 and an EID in which the EID information is stored when a first CPE alerting message is transmitted from the text service server. After the ACK-C storing the parameter is transmitted, if the second CAM including the NONCE parameter including the NONCE (Nunber Uesd Once) information is transmitted from the text service server, the SSM including the authentication parameter in which the generated authentication code is stored is provided. (SMS Sender Message) is characterized in that for transmitting to the text service server.

On the other hand, the SMS hosting device 40 is preferably further provided with a module for performing the hosting function in addition to the configuration of the enterprise customer SMS device 50, the SMS hosting device 40 is SMS transmission request and collection function An intelligent network subscriber 62 for processing may be accommodated.

In addition, the MIDC 2 is an SMS G / W in charge of interworking between the SMS service server 10 of the PSTN and the Short Message Service Center (SMSC) of the mobile communication network, and the ICIS 4 is a service subscriber and billing service in the PSTN. It is a computerized system to manage them.

In the text service providing system of the present invention, a text message having an intelligent network service telephone number received through a MIDC (2) as a called number is received or a text message having an intelligent network service telephone number received from an SMS terminal accommodated in a PSTN is a called number. When received, the text message is reconstructed using the actual telephone number registered in the intelligent network service telephone number, and then the text message reconstructed is transmitted to the actual telephone number.

That is, the text service server 10 receives a text message from the SMS terminal accommodated in the PSTN and receives the text message from the SMS terminal, and if the destination number of the text message is an intelligent network service telephone number, the subscriber information database 11 Searches for the actual telephone number of the intelligent network service telephone number and transmits the text message to the found actual telephone number. In this case, the text message is transmitted to the SMS hosting device 40 or the enterprise customer SMS device 50 or the SMS terminal 30 according to the subscriber type of the actual phone number.

Next, with reference to the flowcharts shown in Figs. 3 and 4, a text message providing method in the case where a text message whose destination number is an intelligent network service telephone number is received from the MIDC 2 will be described in detail.

If the called number of the text message transmitted from the mobile communication terminal of the mobile communication network is an intelligent network service telephone number, the text message is transmitted to the text service server 10 via the MIDC 2 (S2, S4).

The text service server 10 searches the subscriber information database 11 to determine the type of subscriber corresponding to the intelligent network representative telephone number (S6).

If it is determined in S6 that the subscriber type corresponding to the called number is an SMS terminal (Yes in S8), the actual phone number corresponding to the intelligent network telephone number is retrieved from the subscriber information database 11 (S10). In order to connect the call line to the call, the SMS terminal requests a call connection to the actual telephone number to a TOLL exchanger (eg, 14) accommodating the local exchange accommodated (S12).

The TOLL switch 14 receiving the call connection calls the SMS terminal 30 corresponding to the called number through the local switch 20 in which the called number is accepted. At this time, the call number of the call is the phone number of the text service server 10, the SMS terminal 30 is automatically hooked off when the call number of the incoming call is confirmed as the phone number of the text service server 10. As the SMS terminal 30 is hooked off, a call line between the text service server 10 and the SMS terminal 30 is connected.

If the SMS service terminal 10 and the call line is connected (Yes in S14), the text service server 10 transmits a text message between the SMS service server 10 and the SMS terminal 30 disclosed in Korean Patent No. 10-679807. The text message received from the mobile communication network is transmitted to the SMS terminal 30 through the process.

When the text service server 10 completes the text message transmission to the SMS terminal 30 through the above-described procedure (Yes in S18), the text service server 10 disconnects DCM indicating completion of transmission to the SMS terminal 30. Message) to cut the connected call line in step S12 (S20).

Unlike the above case, if the subscriber type corresponding to the called number is not an SMS terminal (No in S8), that is, if the called number is determined as the enterprise customer SMS device 50, the text service server 10 ) Retrieves the actual telephone number corresponding to the intelligent network service telephone number from the subscriber information database 11 (S22; see FIG. 4). The step S22 is the same in the case of the SMS hosting device 40.

In addition, the text service server 10 inquires a serial number (SN; Serial Noumber) for calculating the number of subscribers corresponding to the intelligent network service telephone number received a text message (S24), the actual telephone number In order to connect to the call line, the enterprise customer SMS device 50 requests a call connection to the actual telephone number to the TOLL exchanger (eg, 14) that accommodates the local exchange accommodated (S26).

The TOLL exchanger 14 requesting a call connection calls the enterprise customer SMS device 50 corresponding to the called number through the local exchange 20 in which the called number is received. At this time, the call number of the call is the phone number of the text service server 10, the enterprise customer SMS device 50 is automatically hooked off when the call number of the incoming call is confirmed as the phone number of the text service server 10 . As the corporate customer SMS device 50 is hooked off, a call line between the text service server 10 and the corporate customer SMS device 50 is connected. On the other hand, the text service server 10, if the destination terminal corresponding to the actual destination number is the SMS hosting device 40, the text service server 10 is the number of subscribers corresponding to the intelligent network service telephone number received the text message After inquiring a serial number (SN; Serial Noumber) for calculating, directly calling the SMS hosting device 40, SMS hosting device 40 is automatically hooked off as SMS service server 10 and SMS Call lines between the hosting devices 40 are connected.

When the call line is connected to the enterprise customer SMS device 50 or the SMS hosting device 40 (Yes in S28), the text service server 10 uses an SMS data message (SDM) including the serial number inquired in S24. The text message is transmitted (S30).

When the text service server 10 completes the text message transmission to the enterprise customer SMS device 50 through the above-described procedure (YES in S31), the text service server 10 completes the transmission to the enterprise customer SMS device 50. Transmitting a disconnected message (DCM), which means a disconnected call line through the step S26 (S32).

Steps S28 to S32 shown in FIG. 4 will be described in more detail with reference to the message flowchart shown in FIG. 5.

The text service server 10 and the enterprise customer SMS device 50 transmit and receive a message frame by FSK signaling through a connected call line.

The text service server 10 transmits a CAS (CPE Alerting Signal) between 50 and 5000 ms after the call line is connected (T2).

The enterprise customer SMS device 50 transmits an ACK within 100 ms after receiving the CAS (T3), and the text service server 10 transmits a CPE Alerting Message (CAM) within 100 ms after receiving the ACK (T4). ). The CAM is a message in which the text service server 10 notifies the corporate customer SMS device 50 of the reception preparation. The corporate customer SMS device 50 sends a terminal response message to the text message server 10 upon receiving the CAM. You must respond by

The CAM configures a message type word, a message length word, and a service start parameter, as shown in FIG. 6, where the message type word and the message length word correspond to a message header (MH), and the service start parameter is a message. It corresponds to the main body MB.

Meanwhile, as illustrated in FIG. 6, a NONCE parameter may be selectively configured in the message body MB of the CAM. The NONCE parameter may be set by the enterprise customer SMS device 50 to transmit a text message by an intelligent device, which will be described later. ) Is provided in the CAM for transmitting to the text service server 10.

Subsequently, the enterprise customer SMS device 50 transmits the ACK-C within 200 ms after receiving the CAM (T5). The ACK-C transmitted at T5 is composed of a message type word, a message length word, a terminal response parameter, and a version parameter as shown in FIG. For reference, the ACK-C transmitted when the intelligent device I transmits a text message to the text service server 10 may additionally configure an EID parameter as shown in FIG. 7.

After receiving the ACK-C, the text service server 10 transmits an SMS data message (SDM) within 400 ms (T6), wherein the SDM is a message that carries a short message content as shown in FIG. 8. Message length word, time parameter, SN parameter, receiver parameter, reply number parameter, and short message parameter. Here, the time parameter and the SN parameter are essential parameters, and the reply number parameter and the SMS message parameter are optional parameters. In particular, the text service server 10 can distinguish the intelligent subscriber by storing the intelligent network representative phone number in the receiver parameter.

The enterprise customer SMS device 50 transmits an ACK-F within 400 ms after receiving the SDM (T7), and the text service server 10 transmits a disconnect message (DCM) which is a call line disconnect message within 200 ms after receiving the ACK-F. After the transmission (T8), the transition to the channel Release state (T10).

The enterprise customer SMS device 50 is immediately on-hook after receiving the DCM (T9).

Thus, the call line between the text service server 10 and the corporate customer SMS device 50 is cut off. In FIG. 5, the message flow between the text service server 10 and the enterprise customer SMS device 50 has been described, but the message flow between the text service server 10 and the SMS hosting device 40 is the same as described above.

Parameter types used in the CAM, ACK-C, SDM, SSM, CAM, and RSM transmitted between the text service server 10 and the enterprise customer SMS device 50 are shown in Table 1 below.

Parameter types Code (Hexadecimal) Code (binary) Usage message Service start parameters
(Service Start Parameter) 0x02 0000 0010 CAM Terminal response parameter
(CPE ACK Parameter) 0x03 0000 0011 ACK-C Receiver parameter
(Receiver Parameter) 0x06 0000 0110 SDM sent to intelligent network devices Sender parameters
(Sender Parameter) 0x08 0000 1000 SSM sent to intelligent network devices NONCE parameter
(Number Used Once Parameter) 0x14 0001 0100 2nd CAM, RSM when sending SDM EID parameter
(Equipment ID Parameter) 0x15 0001 0101 ACK-C Authentication parameter
(Authentication Parameter) 0x16 0001 0110 SSM SN parameter
(Sequence Number Parameter) 0x17 0001 0111 SSM, SDM

The contents of each parameter follow ASCII code system for numbers, English and symbols, and KSX-1001 code system for Korean.

Service Start Parameter

It is used for the CAM (terminal recognition message) transmitted from the intelligent text message server 10 to the SMS terminal or SMS hosting device 40 or the enterprise customer SMS device 50. The parameter length is 1 byte and indicates a service start type through a code value defined as shown in FIG.

In particular, the service start parameter " 0000 0000 (0x01) " is an SMS Send parameter for notifying that a text message is to be sent to the other party, and 0000 1001 (0x09) can be transmitted from the SMS hosting device 40 or the enterprise customer SMS device 50. Intelligent Receive Ready parameter that indicates that a short message can be received.

CPE ACK Parameter

Used for terminal response message (ACK-C). The parameter length is 1 byte and indicates the terminal response type through a code value defined as disclosed in FIG.

In particular, the terminal response parameter "0000 1001 (0x09)" is an intelligent SMS Send parameter for notifying that an intelligent SMS is to be transmitted.

Receiver Parameter

The text service server 10 is configured in the SDM transmitted to the SMS hosting device 40 or the enterprise customer SMS device 50, so that the intelligent network representative phone number of the text service server 10 can be input to distinguish intelligent subscribers. . Text or a digit can be input as the content, and the configuration is as shown in FIG.

Sender Parameter

The SMS hosting device 40 or the enterprise customer SMS device 50 is added to an SMS sender message (SSM) that is transmitted to the text service server 10, and an intelligent network service telephone number of the text service server 10 is inputted so that the intelligent network subscriber is entered. Allows you to distinguish text messages sent from. Text or a digit can be input as the content, and the configuration is as shown in FIG.

NONCE parameter (Number Used Once Parameter)

When the short message is sent from the SMS hosting device 40 or the corporate customer SMS device 50, the second CAM transmitted from the text service server 10 to the corresponding SMS hosting device 40 or the corporate customer SMS device 40. Used for The NONCE parameter is a parameter used for generating an authentication code and is a value randomly assigned by the text service server 10. The parameter length is 8 bytes and arbitrary ASCII codes are stored as the contents of the parameter.

The configuration of the NONCE parameter is as shown in FIG.

EID Parameter

When the SMS hosting device 40 or the enterprise customer SMS device 50 sends the SMS, it is used for the terminal response message (ACK-C). The parameter length is 12 bytes, and the identifier (ID) of the device is stored as the parameter content.

The configuration of the EID parameter is as shown in FIG.

Authentication Parameter

Used for SMS Send Message (SSM). The length of the parameter is 16 bytes. As the content of the parameter, the result of performing the MD5 encryption process by combining the unique encryption key value and the NONCE parameter extracted from the CAM is the authentication information. Stored.

The configuration of the authentication parameter is as shown in FIG.

-SN parameter (Sequence Number Parameter)

Used for SSM and SDM. The maximum length of the parameter is 10 bytes and the parameter content contains only numbers. Each byte has an ASCII code value and represents a message sent in the SMS hosting device 40 or the enterprise customer SMS device 50 and has a range of 0 to 4294967295.

The configuration of the SN parameter is as shown in FIG.

Next, a text service providing method according to an exemplary embodiment of the present invention will be described with reference to the flowcharts shown in FIGS. 17 and 18.

17 and 18 illustrate a text service providing method when the SMS hosting device 40 or the corporate customer SMS device 50 transmits a text message to the text service server 10.

First, when a user of any SMS hosting device 40 or enterprise customer SMS device 50 requests sending a text message to send a text message, the corresponding SMS hosting device 40 or enterprise customer SMS device 50 In order to connect the call line with the text service server 10, a call is generated using the called number as the phone number of the text service server 10 (S40).

Subsequently, the local exchange 20 and the TOLL exchange 16 of the wire telephone network perform an incoming call to call the text service server 10 corresponding to the called number through number translation (S42).

When the text service server 10 is in the hook-off state in response to the call, a call line between the text service server 10 and the corresponding SMS hosting device 40 or the corporate customer SMS device 50 is connected (S44). .

When the call line is connected, the text service server 10 transmits the CAS to the SMS hosting device 40 or the enterprise customer SMS device 50 between 50 and 5000 ms after the call line is connected (S46).

Upon receiving the CAS, the SMS hosting device 40 or the enterprise customer SMS device 50 transmits an ACK to the text service server 10 within 100 ms (S48).

The text service server 10 receiving the ACK transmits the CAM to the SMS hosting device 40 or the enterprise customer SMS device 50 within 100 ms (S50). The service start parameter of the CAM stores "0x06" (see Fig. 6). The service start parameter " 0x06 " means a Receive Ready state (see FIG. 9).

The intelligent device I receiving the CAM transmits the ACK-C to the text service server 10 within 200 ms (S52). The ACK-C is equipped with an EID parameter (see FIG. 14) and transmits a CAM to the SMS hosting device 40 or the enterprise customer SMS device 50 (S54). The CAM is provided with a NONCE parameter (Fig. 13), and a "0x09" is stored in the service start parameter (see Fig. 6). The service start parameter " 0x09 " means an intelligent SMS Receive Ready state (see FIG. 9).

Meanwhile, the SMS hosting device 40 or the enterprise customer SMS device 50 stores an encryption key value uniquely assigned to the corresponding device by mapping to an EID which is a device identifier uniquely assigned to each device. The SMS hosting device 40 or the enterprise customer SMS device 50 generates an authentication code by combining the encryption key value and the code value stored in the NONCE parameter of the CAM (S56). The SMS hosting device 40 or the enterprise customer SMS device 50 may generate the authentication code using an encryption algorithm. For example, the SMS hosting device 40 or the enterprise customer SMS device 50 may generate the authentication code using an MD 5 (Message Digest algorithm 5). MD5 is a one-way hash function that compresses an arbitrary message and returns a fixed length hash value in 32-bit units. The encryption algorithm applied to the present invention is not limited to the above MD 5.

The SMS hosting device 40 or the enterprise customer SMS device 50 stores an authentication parameter (see FIG. 15) and an SN parameter (see FIG. 15) in which a password code generated in S56 is stored in the text service server 10 within 400 ms after receiving the CAM. SSM (SMS Sender Message) including the (S58).

The SSM is a message that carries the content of a short message when the SMS hosting device 40 or the enterprise customer SMS device 50 wants to transmit a short message. The called number parameter, authentication parameter, SN parameter, reply number parameter, SMS It consists of message parameter and time parameter.

The configuration of the SSM is as shown in FIG.

In the SSM, the called number parameter, the authentication parameter, and the SN parameter are required parameters, and the reply number parameter, the SMS message parameter, and the time parameter are optional parameters. In the case of broadcast transmission, a plurality of called party number parameters may be included using a connection message. In addition, when a time parameter is included, it means a reservation transmission time.

On the other hand, when the SMS hosting device 40 transmits a text message, the intelligent subscriber representative number is stored in the sender parameter for transmission of the intelligent subscriber, and in this case, the sender parameter is an essential parameter. However, when the enterprise customer SMS device 50 or the SMS terminal 30, 32 transmits a text message, the caller parameter is a selection parameter.

After receiving the SSM, the text service server 10 transmits the DCM to the SMS hosting device 40 or the enterprise customer SMS device 50 (S60), and receives the DCM, the SMS hosting device 40 or The enterprise customer SMS device 50 transitions to the on-hook state (S62), and the text service server 10 transitions to the channel Release state (S64).

Thus, the call line between the SMS hosting device 40 or the corporate customer SMS device 50 and the text service server 10 is cut off.

On the other hand, the character service server 10 retrieves the encryption key value corresponding to the EID stored in the EID parameter of the ACK-C received in step S52 by using the stored encryption key value matched with the EID of each device, the retrieved encryption key The authentication code is generated by applying the value and the NONCE code stored in the NONCE parameter of the CAM transmitted in step S54 to the encryption algorithm. It is preferable to use the same encryption algorithm as the encryption algorithm used in step S56.

Subsequently, the character service server 10 compares the authentication code generated in step S66 with the authentication code stored in the authentication parameter of the SSM received in step S58 (S66) and determines whether the authentication codes match each other (S68).

As a result of the determination in step S68, if the authentication codes match (YES in S68), the text message transmitted through the SSM is transferred to the called number (S70).

On the other hand, if the authentication code does not match with each other as a result of the determination of S68 (No at S68) it is determined that the text message transmitted through the SSM as an abnormal state and discarded (S69).

When the SMS hosting device 40 or the corporate customer SMS device 50 requests a text message transmission to the text service server by the process of FIGS. 17 to 18 described above, the SMS hosting device 40 or the enterprise customer SMS device ( After authenticating the text message transmitted from 50), the text message is transmitted to the called number only when the text message is successfully authenticated.

Therefore, only the text message transmitted from the SMS hosting device 40 or the enterprise customer SMS device 50, which has been normally assigned a NONCE code from the text service server 10, may be successfully transmitted and sent to the called number.

On the other hand, the text message transmitted in an inappropriate manner by accessing the text service server 10 abnormally without being normally assigned a nonce code from the text service server 10 is discarded, thereby unauthenticated SMS hosting device or enterprise customer SMS device. You can block access.

1 is an overall configuration diagram of a text service providing system according to an embodiment of the present invention.

2 is a detailed configuration diagram of the enterprise customer SMS device 50 shown in FIG.

3 and 4 are flowcharts for explaining a text service providing method according to an embodiment of the present invention.

5 is a message flow chart for explaining in detail the steps S28 to S32 of FIG.

6 is a configuration diagram of a CPE Alerting Message (CAM) applied to the present invention.

7 is a block diagram of the ACK-C applied to the present invention.

8 is a configuration diagram of an SMS data message (SDM) applied to the present invention.

9 is a configuration diagram of service start parameters applied to the present invention.

10 is a block diagram of a terminal response parameter applied to the present invention.

11 is a configuration diagram of a receiver parameter applied to the present invention.

12 is a diagram illustrating a sender parameter configuration applied to the present invention.

13 is a configuration diagram of a NONCE parameter applied to the present invention.

14 is a diagram illustrating the configuration of an EID parameter applied to the present invention.

15 is a configuration diagram of the authentication parameter applied to the present invention.

16 is a configuration diagram of an SN parameter applied to the present invention.

17 to 18 are flowcharts for explaining a text service providing method according to an embodiment of the present invention.

19 is a configuration diagram of an SMS send message (SSM) applied to the present invention.

Claims (31)

A character that transmits the received text message to the called terminal by FSK (Frequency Shift Keying) signaling while connecting a called terminal having a real phone number for the intelligent network user's telephone number included in the received text message and a call line. Service server; And Calling the called terminal upon the request of the text service server, the call line is connected, and when the text message transmission is complete, characterized in that it comprises a switch for cutting the call line Text service provision system. The method of claim 1, And a subscriber information database for storing an actual telephone number for the intelligent network service telephone number. Text service provision system. The method of claim 1, wherein the text service server When the actual called terminal and the call line are connected, a CAS (CPE Alerting Signal) is transmitted to the called terminal, and when there is a text message transmission response from the called terminal, a CAM (CPE Alerting Message) including a service start parameter is transmitted. After that, characterized in that to transmit the SDM (SMS Data Message) to the called terminal Text service provision system. The method of claim 3, wherein the SDM Characterized in that the SN parameter indicating the number of text messages transmitted and received by the terminal unit Text service provision system. The method of claim 4, wherein the SN parameter is Characterized in that is defined as follows Text service provision system. 7 6 5 4 3 2 One 0 One 0001 0111 (0x17): SN parameter type 2 ???? ???? (0x **): Parameter length (up to 10 bytes) 3 Digit 1 4 Digit 2 Y + 2 Digit Y Where "?" Is "0" or "1", and "**" is a hexadecimal number that falls in the range of "00" to "0A", "???? ???? (0x **)" does not exceed "0000 1010 (0x0A)" The method of claim 1, wherein the called terminal is Characterized in that the enterprise customer SMS device having a plurality of channels to transmit and receive the message of the FSK signaling method according to the SMS transmission and reception through each channel Text service provision system. The method of claim 1, wherein the called terminal is Characterized in that it is an SMS hosting device having a plurality of channels to host the SMS transmission and reception function FSK signaling method Text service provision system. The method of claim 1, wherein the called terminal is Characterized in that it is an SMS terminal for receiving a text message transmitted from the text service server through the connected call line in the FSK signaling method Text service provision system. An exchanger for connecting a call line between the calling terminal and the text service server; And Receiving a text message from the calling terminal in a state in which the call line is connected, cutting the call line, and authenticating the text message to transmit a text message to the called terminal. Characterized Text service provision system. The method of claim 9, And a subscriber information database storing information for authentication of the calling terminal and a subscriber type of the calling terminal. Text service provision system. The method of claim 10, wherein the information for authentication of the calling terminal is Characterized in that the encryption key value for the originating terminal and the NONCE information randomly assigned for encryption Text service provision system. 10. The method of claim 9, wherein the text service server is Receiving the text message in the FSK signaling method from the calling terminal through the call line Text service provision system. The method of claim 12, wherein the text service server is The CAS is transmitted to the calling terminal, and when the ACK is transmitted from the calling terminal, the first CAM is transmitted to the calling terminal, and if the ACK-C storing the EID (Equipiment ID) parameter is transmitted from the calling terminal, NONCE (Number Used Once) transmits the second CAM storing the NONCE parameter including the information, and if the SSM storing the authentication code is transmitted from the originating terminal characterized in that for performing authentication for the SSM  Text service provision system. The method of claim 13, wherein the text service server is After extracting the EID information from the EID parameter to search for the pre-stored encryption key mapped to the EID information, applying the encryption key and the NONCE information to an encryption algorithm to generate an authentication code, and then to the authentication code and the SSM Comparing the stored authentication codes to perform authentication on the SSM; Text service provision system. The method according to claim 13, wherein the EID parameter is defined as follows. Text service provision system. 7 6 5 4 3 2 One 0 One 0001 0101 (0x15): EID parameter type 2 0000 1100 (0x0C): Parameter length (12 bytes) 3 Character 1 4 Character 2 Y + 2 Letter Y The method of claim 13, wherein the NONCE parameter is defined as follows Text service provision system. 7 6 5 4 3 2 One 0 One 0001 0100 (0x14): NONCE parameter type 2 0000 1000 (0x08): Parameter length (8 bytes) 3 Character 1 4 Character 2 Y + 2 Letter Y The method of claim 13, wherein the SSM is Store the authentication parameter is stored the authentication code, the authentication parameter is characterized in that defined as follows Text service provision system. 7 6 5 4 3 2 One 0 One 0001 0110 (0x16): Authentication parameter type 2 0001 0000 (0x10): Parameter length (16 bytes) 3 Character 1 4 Character 2 Y + 2 Letter Y The method of claim 13, wherein the SSM is And transmitting an SN parameter indicating the number of text messages transmitted and received on a terminal basis to the text message. Text service provision system. (a) extracting a real phone number for the intelligent network representative telephone number when a text message is generated using the intelligent network representative telephone number as a called number; (b) connecting the actual telephone number terminal and the call line by calling the actual telephone number; (c) transmitting the text message to the actual telephone number terminal through an FSK signal through the call line; And (d) transmitting the text message together with transmitting the text message transmission / reception number information of the intelligent network representative telephone number; How to provide text service. (A) receiving a text message from the calling terminal through an FSK signaling method when the calling terminal and the calling line are connected; (B) analyzing the received text message to perform authentication on the text message; And (C) if the authentication is successful for the text message, characterized in that it comprises the step of transmitting the text message to the called terminal; How to provide text service. The method of claim 20, wherein Transmitting NONCE information to the calling terminal through the call line, characterized in that How to provide text service. The method of claim 21, wherein the NONCE information is Characterized in that stored in the NONCE parameter of the CAM transmitted How to provide text service. The process of claim 21, wherein (B) (B1) generating an encryption code by encrypting the NONCE information and a unique encryption key value of the calling terminal previously stored; (B2) determining the validity of the text message on the basis of the correspondence between the authentication code included in the text message transmitted from the calling terminal and the encryption code generated in step (b1). How to provide text service. 24. The method of claim 23, wherein the text message is Characterized in that the authentication code is stored with the authentication parameters and serial parameters, and the called number parameters How to provide text service. 25. The method of claim 24, wherein the text message is Caller parameters, reply number parameters, short message parameters, time parameters characterized in that the further provided How to provide text service. A message transmitting / receiving unit which transmits and receives various signals for connection of a call line with a text service server and various messages of an FSK signaling method for transmitting and receiving a text message with the text service server; A text message input / output unit for receiving various information on the text message to be transmitted and outputting the received text message; An authentication code generation unit for generating an authentication code using previously stored encryption keys and NONCE information; And And a controller for controlling the message transmission / reception unit to perform overall control such that the text message input through the text message input / output unit is transmitted to the text service server through a call line. Character service providing terminal. The message transmission / reception unit of claim 26, wherein the message transmission / reception unit When the CAS is transmitted from the text service server, an ACK is transmitted.When the first CAM is transmitted from the text service server, the ACK-C storing the EID parameter storing the EID information is transmitted, and then the NONCE information is included from the text service server. When the second CAM provided with the NONCE parameter is transmitted is characterized in that for transmitting the SSM with the authentication parameter stored in the generated authentication code to the text service server  Character service providing terminal. 28. The apparatus of claim 27, wherein the message transmitting / receiving unit Characterized by the SN parameter indicating the number of text messages transmitted and received to the SSM and characterized in that for transmission Character service providing terminal. The method of claim 28, wherein the SN parameter is Characterized in that is defined as follows Character service providing terminal. 7 6 5 4 3 2 One 0 One 0001 0111 (0x17): SN parameter type 2 ???? ???? (0x **): Parameter length (up to 10 bytes) 3 Digit 1 4 Digit 2 Y + 2 Digit Y Where "?" Is "0" or "1", and "**" is a hexadecimal number that falls in the range of "00" to "0A", "???? ???? (0x **)" does not exceed "0000 1010 (0x0A)" 28. The method of claim 27, The EID parameter is defined as follows. Character service providing terminal. 7 6 5 4 3 2 One 0 One 0001 0101 (0x15): EID parameter type 2 0000 1100 (0x0C): Parameter length (12 bytes) 3 Character 1 4 Character 2 Y + 2 Letter Y 28. The method of claim 27, The NONCE parameter is defined as follows. Character service providing terminal. 7 6 5 4 3 2 One 0 One 0001 0100 (0x14): NONCE parameter type 2 0000 1000 (0x08): Parameter length (8 bytes) 3 Character 1 4 Character 2 Y + 2 Letter Y

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