KR20010093943A - Device and method for transmitting message between sms and scp in cdma system - Google Patents

Abstract

PURPOSE: An SMS(Service Management System)-to-SCP(Service Control Point) message transmission system and a method in a CDMA intelligent network system are provided to offer call services of good quality to users by improving the reliability of instruction transmission in data downloading and uploading to an SCP in a CDMA intelligent network system. CONSTITUTION: An SMS-to-SCP message transmission system consists of an SMS(100) and a plurality of SCPs(200). An SMS(100), comprised of an external interface block(101) and an SCP interface part(102), receives a subscriber information modification instruction from a subscriber information processing unit(1) and transmits it to a relevant SCP(200) through TCP/IP communication. If the subscriber information modification instruction is inputted, the external interface block(101) changes it into an SMS internal packet and outputs it to the SCP interface part(102). The SCP interface part(102), if the external interface block(101) outputs the subscriber information modification instruction, changes it in the form of a TCP/IP packet and transmits it to an SMS interface part(201) in a relevant SCP(200). Each SCP(200) consists of an SMS interface part(201), an SMS interface block(202), and a plurality of extrinsic service processing servers(203). The SMS interface part(201) receives the subscriber information modification instruction from the SCP interface part(102), changes it into the packet of an SCP internal standard, and outputs it to the SMS interface block(202). If the SMS interface part(201) outputs the subscriber information modification instruction, the SMS interface block(202) transmits it to a relevant extrinsic service processing server(203) after catching which extrinsic service the instruction belongs to.

Description

Apparatus and method for transmitting messages between SMs and SCs in a CDMA intelligent network system {DEVICE AND METHOD FOR TRANSMITTING MESSAGE BETWEEN SMS AND SCP IN CDMA SYSTEM}

The present invention relates to an apparatus and a method for transmitting a message between an SMS (Service Management System; SMS) and an SCP (Service Control Point; SCP) in a Code Division Multiple Access (CDMA) intelligent network system. In more detail, the subscriber information processing apparatus allows the standardized message transmission through the interface block between the SCP and the SMS when downloading and uploading data to the SCP in the intelligent network system. The present invention relates to an apparatus and a method for transmitting a message between SMs and SCPs in a CDA intelligent network system for maximizing command processing and mutual interfaces.

As shown in FIG. 1, the apparatus for transmitting messages between SMs and SCs in a conventional CDMA intelligent network system receives a subscriber information change command from a subscriber information processing apparatus 1, changes it to an SMS internal packet, and then uses the SCP interface. The external interface block 11 outputted to the unit 12 and the subscriber interface change command received from the external interface block 11 are converted into TCP / IP (Transmission Control Protocol / Internet Protocol) packets and then the plurality of SCPs ( SMS 10 having SCP interface unit 21 for transmitting to MMCD (Man Machine Control Device; MMCD) 21 in corresponding SCP 20; Upon receiving the subscriber information change command of the TCP / IP packet transmitted from the SCP interface unit 12 in the SMS 10 and identifying whether the command is a processing command corresponding to the additional service, processing the additional service. It consisted of several SCP 20 each equipped with the MMCD 21 to transmit to the server 22 for.

However, in the conventional CDMA intelligent network system, the message transmission device between SMs and SCs performs both command processing and transmission operations in the MMCD block in the SCP when the subscriber information processing device downloads and uploads data to the SCP in the intelligent network system. In addition to the command processing operation from the subscriber information processing apparatus described above, it is a block that processes various commands such as all data command processing operations, MMC command processing operations, etc. in a GUI (Graphic User Interface) environment, and thus takes a lot of load, thereby overloading the MMCD block. Due to the load, there is a problem that the instruction from the subscriber information processing device is frequently lost.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to improve the reliability of command transmission when downloading and uploading data from the subscriber information processing device to the SCP in the intelligent network system. The present invention provides an apparatus and a method for transmitting a message between SMs and SCPs in a CDM intelligent network system for providing a call service.

In order to achieve the above object, the message transmission device between SMs and SCs in the CDMA intelligent network system of the present invention receives a subscriber information change command such as registration, deletion, or change of subscriber information from a subscriber information processing device to perform TCP / IP communication. In the SMS and SCP message transmission device in the CDMS intelligent network system having a plurality of SCPs to manage the large amount of subscriber information by receiving the SMS transmitted to the corresponding SCP of the plurality of SCPs, and the subscriber information change command from the SMS ,

The SMS receives a subscriber information change command from the subscriber information processing device through a TCP / IP communication, changes it into an SMS internal packet, outputs it, and receives the subscriber information processing result data into a TCP / IP packet. An external interface block for transmitting to the subscriber information processing apparatus, and

It receives the subscriber information change command from the external interface block, changes it into a TCP / IP packet, transmits it to the corresponding SCP among the plurality of SCPs, and receives the subscriber information processing result data in the TCP / IP packet format. A SCP interface unit for converting the packet into the external interface block and outputting the packet;

The plurality of SCPs receives the subscriber information change command of the TCP / IP packet transmitted from the SCP interface unit in the SMS, changes the packet into a packet of the SCP internal standard, and outputs it, while processing the subscriber information in the form of a packet of the SCP internal standard. An SMS interface unit for receiving the result data and converting it into a TCP / IP packet and outputting it to the SCP interface unit in the SMS; and

The SMS interface unit receives the subscriber information command and at the same time determines whether the command is a processing command corresponding to the additional service, and transmits the subscriber information command to the server for processing the additional service. It is characterized in that each of the SMS interface block for receiving the subscriber information processing result data to be converted to the packet form of the SCP internal standard and output to the SMS interface unit.

In the message transmission method between SMs and SCs in the CDM intelligent network system of the present invention, the message transmission method from SM to SC is such that an external interface block in the SMS receives a subscriber information change command in the form of a TCP / IP packet from a subscriber information processing device. A first step of changing the SMS into an internal packet and outputting the same to the SCP interface unit;

A first and second step of receiving, by the SCP interface unit, a subscriber information change command and identifying which SCP of the plurality of SCP commands corresponds to the subscriber information change command;

Steps 1-3, wherein the SCP interface unit attempts a TCP / IP socket connection to the SCP;

A first step of checking whether the SCP interface unit successfully establishes a TCP / IP socket connection with the SCP;

If the TCP / IP socket connection with the SCP fails in step 1-4, the SCP interface unit proceeds to step 1-4 again, and if the TCP / IP socket connection with the SCP succeeds, the SCP interface unit First to fifth steps of configuring the subscriber information change command in the form of a packet based on the TCP / IP protocol standard and transmitting the same to the SMS interface unit in the SCP;

Steps 1-6, wherein the SMS interface unit within the SCP receives a subscriber information change command in the form of a TCP / IP packet and determines whether the subscriber information change command is valid valid data;

If the subscriber information change command is normal valid data in steps 1-6, the SMS interface unit converts the subscriber information change command into a packet of an SCP internal standard and outputs it to an SMS interface block; And

The SMS interface block receives a subscriber information change command from the SMS interface unit, determines whether the command is a processing command corresponding to the additional service, and then transmits the subscriber information command to the corresponding additional service processing server. It is characterized by consisting of steps 1-8.

On the other hand, of the message transmission method between SM and SC in the CDMA intelligent network system, the message transmission method from SCP to SM is based on whether the SMS interface block in the SCP has inputted subscriber subscriber information processing result data from the server for processing the additional service. Step 2-1 of determining whether or not;

If the subscriber information processing result data is not input from the additional service processing server in step 2-1, the SMS interface block proceeds to step 2-1 again, and the subscriber information is processed from the additional service processing server. If the result data is input, step 2-2 of the SMS interface block converting the subscriber information processing result data into the packet form of the SCP internal standard and outputting the result to the SMS interface unit;

Step 2-3, wherein the SMS interface unit receives the subscriber information processing result data from the SMS interface block and attempts a TCP / IP socket connection to the SMS;

A second step of checking whether the SMS interface unit successfully establishes a TCP / IP socket connection with the SMS;

If the TCP / IP socket connection with the SMS fails in step 2-4, the SMS interface unit proceeds to step 2-4 again. If the TCP / IP socket connection with the SMS succeeds, the SMS interface unit A step 2-5 of constructing the subscriber information processing result data in the form of a packet based on the TCP / IP protocol specification and transmitting it to the SCP interface unit in the SMS;

Step 2-6 of receiving, by the SCP interface unit within the SMS, the subscriber information processing result data in the form of a TCP / IP packet and determining whether the subscriber information processing result data is normal valid data;

If the subscriber information processing result data is normal valid data in step 2-6, step 2-7 of the SCP interface unit converts the subscriber information processing result data into a packet of SMS internal standard and outputs it to the external interface block. ; And

In step 2-8, the external interface block receives the subscriber information processing result data from the SCP interface unit, configures the data in the form of a packet based on the TCP / IP protocol, and transmits the data to the subscriber information processing apparatus. Characterized in that made.

1 is a functional block diagram showing the configuration of a message transmission device between SMs and SCs in a conventional CDMA intelligent network system;

FIG. 2 is a functional block diagram showing a configuration of an SMS transmission apparatus between SMS and SCP in a CDA intelligent network system according to an embodiment of the present invention; FIG.

FIG. 3 is an operation flowchart showing a method of transmitting a message from an SM to an SCP among the SM and SC messages in the CDM intelligent network system according to FIG. 2;

FIG. 4 is an operation flowchart illustrating a method of transmitting a message from the SCP to the SMS in the message transmission method between the SM and the SCP in the CDA intelligent network system according to FIG. 2.

<Explanation of symbols for the main parts of the drawings>

100: SMS 101: external interface block

102: SCP interface unit 200: SCP

201: SMS interface unit 202: SMS interface block

203: server for additional service processing

Hereinafter, an apparatus and a method for transmitting a message between SMs and SCs in a CDA intelligent network system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a functional block diagram of a message transmission device between SMs and SCs in a CDM intelligent network system according to an embodiment of the present invention, and the message transmission device between SMs and SCPs in a CDM intelligent network system according to an embodiment of the present invention. An SMS (100) having an external interface block (101), and an SCP interface unit (102); It is composed of a plurality of SCPs 200 each having an SMS interface unit 201, an SMS interface block 202, and a plurality of additional service processing servers 203.

The SMS 100 receives a subscriber information change command such as subscriber information registration, deletion, change, etc. from the subscriber information processing apparatus 1, and the corresponding SCP 200 among the plurality of SCPs 200 through TCP / IP communication. System to transmit.

At this time, when the external interface block 101 mounted in the SMS 100 receives a subscriber information change command from the subscriber information processing apparatus 1 through TCP / IP communication, the external interface block 101 changes the subscriber information change command into an SMS internal packet. After outputting to the SCP interface unit 102 and receiving the subscriber information processing result data from the SCP interface unit 102, the subscriber information processing device is changed into a TCP / IP packet and then the subscriber information processing device. It serves to send.

In addition, when the SCP interface unit 102 mounted in the SMS 100 outputs a subscriber information change command from the external interface block 101, the SCP interface unit 102 receives the input information, changes it into a TCP / IP packet, and then converts the plurality of SCPs into a plurality of SCPs 200. While transmitting to the SMS interface unit 201 in the SCP (200), while the SMS interface unit 201 in the SCP (200) transmits the subscriber information processing result data in the form of TCP / IP packet, it is received and received inside SMS After changing to a packet of the standard serves to output to the external interface block (101).

On the other hand, the plurality of SCP (200) is a system that receives a subscriber information change command from the SMS (100) to manage a large amount of subscriber information, respectively.

At this time, the SMS interface unit 201 mounted in the plurality of SCP (200), respectively, receives the TCP / IP packet subscriber information change command from the SCP interface unit 102 in the SMS (100) receives the received inside the SCP After changing to a packet of a standard, the SMS interface block 202 is outputted, and when the SMS interface block 202 outputs subscriber information processing result data in the form of an SCP internal standard, it is received as a TCP / IP packet. After the change, and serves to output to the SCP interface unit 102 in the SMS (100).

In addition, the SMS interface block 202 mounted in each of the plurality of SCPs 200 receives a subscriber information command from the SMS interface unit 201 and receives the same, and at the same time, the command corresponds to an additional service. After determining whether or not it is recognized, the subscriber information command is transmitted to the additional service processing server 203, and the subscriber information processing result data is output from the corresponding additional service processing server 203, and is received. After changing to the packet form of the SMS interface unit 201 serves to output.

Further, the plurality of additional service processing server 203 functions to manage data related to its own additional service, and when the subscriber interface command is output from the SMS interface block 202, it is inputted and managed by itself. After changing the subscriber information, and outputs the processing result value to the SMS interface block 202.

Next, a method of transmitting a message between SMs and SCs in a CDM intelligent network system according to an embodiment of the present invention using a message transmission device between SMs and SCPs in a CDM intelligent network system having the above configuration will be described.

FIG. 3 is an operation flowchart showing a method of transmitting a message from an SM to an SCP among the SM and SC messages in the CDA intelligent network system according to an embodiment of the present invention.

First, a method of transmitting a message from the SM to the SCP among the SMS and the SCP transmission methods in the CDA intelligent network system will be described.

Initially, the external interface block 101 in the SMS 100 receives a subscriber information change command in the form of a TCP / IP packet from the subscriber information processing apparatus 1, changes it into an SMS internal packet, and then converts the SCP interface unit 102 into an SMS. (S1-1).

Then, the SCP interface unit 102 receives a subscriber information change command outputted from the external interface block 101 and indicates which SCP 200 of the plurality of SCPs 200 the subscriber information change command corresponds to. (S1-2).

Then, the SCP interface unit 102 attempts a TCP / IP socket connection to the SCP 200 (S1-3).

Subsequently, the SCP interface unit 102 checks whether the TCP / IP socket connection with the corresponding SCP 200 has been successfully performed (S1-4).

At this time, if the TCP / IP socket connection with the corresponding SCP 200 fails in the first step (S1-4) (NO), the SCP interface unit 102 again the first step (S1-4) On the other hand, if the TCP / IP socket connection with the SCP 200 is successful (YES), the SCP interface unit 102 configures the subscriber information change command in the form of a packet based on the TCP / IP protocol standard. After the transmission to the SMS interface unit 201 in the SCP (200) (S1-5).

Then, the SMS interface unit 201 in the SCP 200 receives a subscriber information change command in the form of a TCP / IP packet transmitted from the SCP interface unit 102 in the SMS 100 and changes the subscriber information at the same time. It is determined whether the instruction is valid valid data (S1-6).

If the subscriber information change command is normal valid data (YES) in step 1-6 (S1-6), the SMS interface unit 201 changes the subscriber information change command into a packet of SCP internal standard and then sends the SMS. Output to interface block 202 (S1-7).

Then, the SMS interface block 202 receives a subscriber information change command from the SMS interface unit 201 and at the same time determines whether the command is a processing command corresponding to the additional service, and then the server for processing the additional service. The subscriber information command is sent to 203 (S1-8).

On the other hand, if the subscriber information change command is not valid valid data (NO) in the first step (S1-6) (SNO), the SMS interface unit 201 in the SCP (200) sends a transmission failure message to the SMS (100) ) Sent to the SCP interface unit 102 (S1-9).

Then, the SCP interface unit 102 in the SMS 100 receives a transmission failure message from the SMS interface unit 201 in the SCP 200, and at the same time, the subscriber information transmitted from the subscriber information processing device 1. Reconfigure the change command into a packet form based on the TCP / IP protocol standard (S1-10).

Thereafter, the SCP interface unit 102 retransmits the subscriber information change command to the SMS interface unit 201 in the corresponding SCP 200, and then proceeds to step 1-6 (S1-6) again (S1-). 11).

In the following description, a method of transmitting a message from the SCP to the SMs in the method of transmitting messages between the SMs and the SCs in the CDA intelligent network system will be described.

First, the SMS interface block 202 in the SCP 200 determines whether or not subscriber subscriber information processing result data has been input from the corresponding additional service processing server 203 (S2-1).

At this time, if the subscriber information processing result data is not input from the corresponding additional service processing server 203 in step 2-1 (S2-1) (NO), the SMS interface block 202 again returns to the second-1. If the subscriber information processing result data is input from the corresponding additional service processing server 203 (YES), the SMS interface block 202 stores the subscriber information processing result data in the SCP. After changing to a standard packet form, the SMS interface 201 is output to the SMS interface unit 201 (S2-2).

Then, the SMS interface unit 201 receives a subscriber information processing result data output from the SMS interface block 202 and attempts a TCP / IP socket connection to the SMS 100 at step S2-3.

Thereafter, the SMS interface unit 201 checks whether the TCP / IP socket connection with the SMS 100 has been successfully performed (S2-4).

At this time, if the TCP / IP socket connection with the corresponding SMS 100 fails in step 2-4 (NO) (SNO), the SMS interface unit 201 again performs step 2-4 (S2-4). On the other hand, if the TCP / IP socket connection with the SMS 100 is successful (YES), the SMS interface unit 210 converts the subscriber information processing result data into a packet form based on the TCP / IP protocol standard. After the configuration is transmitted to the SCP interface unit 102 in the SMS (100) (S2-5).

Then, the SCP interface unit 102 in the SMS 100 receives the subscriber information processing result data in the form of a TCP / IP packet and determines whether the subscriber information processing result data is normal valid data (S2-). 6).

If the subscriber information processing result data is normal valid data (YES) in step 2-6 (S2-6), the SCP interface unit 102 changes the subscriber information processing result data into a packet of SMS internal standard. Output to the external interface block 101 (S2-7).

Then, the external interface block 101 receives the subscriber information processing result data output from the SCP interface unit 102 and configures the data in the form of a packet based on the TCP / IP protocol standard, and then processes the subscriber information. It transmits to the apparatus 1 (S2-8).

On the other hand, if the subscriber information processing result data in step 2-6 (S2-6) is not normal valid data (NO), the SCP interface unit 102 in the SMS (100) sends a transmission failure message to the SCP ( 200 is transmitted to the SMS interface unit 201 (S2-9).

Then, the SMS interface unit 201 in the SCP 200 receives the transmission failure message transmitted from the SCP interface unit 102 in the SMS 100 and simultaneously receives subscriber information transmitted from the SMS interface block 202. The processing result data is reconstructed into a packet form based on the TCP / IP protocol standard (S2-10).

Thereafter, the SMS interface unit 201 in the SCP 200 retransmits the subscriber information processing result data to the SCP interface unit 102 in the SMS 100, and then again performs steps 2-6 (S2-6). Proceed to step S2-11).

As described above, the apparatus for transmitting messages between SMs and SCs in a CDM intelligent network system according to the present invention, and the method thereof, can be standardized through an interface block between SCP and SMS when downloading and uploading data from a subscriber information processing device to an SCP in an intelligent network system. In addition to maximizing accurate command processing and mutual interface by allowing a message to be sent, it has an excellent effect of providing a higher quality call service to the user by improving the reliability of command transmission.

Claims (5)

Subscriber information change command such as subscriber information registration, deletion, change, etc. from subscriber information processing device is sent to corresponding SCP among multiple SCPs through TCP / IP communication, and subscriber information change command is received from SMS. In the message transmission device between the SMS and SCP in the CDMS intelligent network system having a plurality of SCPs for managing subscriber information of, The SMS receives a subscriber information change command from the subscriber information processing device through a TCP / IP communication, changes it into an SMS internal packet, outputs it, and receives the subscriber information processing result data into a TCP / IP packet. An external interface block for transmitting to the subscriber information processing apparatus, and It receives the subscriber information change command from the external interface block, changes it into a TCP / IP packet, transmits it to the corresponding SCP among the plurality of SCPs, and receives the subscriber information processing result data in the TCP / IP packet format. A SCP interface unit for converting the packet into the external interface block and outputting the packet; The plurality of SCPs receives the subscriber information change command of the TCP / IP packet transmitted from the SCP interface unit in the SMS, changes the packet into a packet of the SCP internal standard, and outputs it, while processing the subscriber information in the form of a packet of the SCP internal standard. An SMS interface unit which receives the result data and changes it into a TCP / IP packet and outputs it to the SCP interface unit in the SMS; and The SMS interface unit receives the subscriber information command and at the same time determines whether the command is a processing command corresponding to the additional service, and transmits the subscriber information command to the server for processing the additional service. And an SMS interface block for receiving subscriber information processing result data into a packet form of an SCP internal standard and outputting the same to the SMS interface unit, respectively. In the message transmission method from SM to SCP in a CDMA intelligent network system, A step 1-1 of receiving, by the external interface block within the SMS, a subscriber information change command from the subscriber information processing apparatus in the form of a TCP / IP packet, converting it into an SMS internal packet, and outputting it to the SCP interface; A first and second step of receiving, by the SCP interface unit, a subscriber information change command and identifying which SCP of the plurality of SCP commands corresponds to the subscriber information change command; Steps 1-3, wherein the SCP interface unit attempts a TCP / IP socket connection to the SCP; A first step of checking whether the SCP interface unit successfully establishes a TCP / IP socket connection with the SCP; If the TCP / IP socket connection with the SCP fails in step 1-4, the SCP interface unit proceeds to step 1-4 again, and if the TCP / IP socket connection with the SCP succeeds, the SCP interface unit First to fifth steps of configuring the subscriber information change command in the form of a packet based on the TCP / IP protocol standard and transmitting the same to the SMS interface unit in the SCP; Steps 1-6, wherein the SMS interface unit within the SCP receives a subscriber information change command in the form of a TCP / IP packet and determines whether the subscriber information change command is valid valid data; If the subscriber information change command is normal valid data in steps 1-6, the SMS interface unit converts the subscriber information change command into a packet of an SCP internal standard and outputs it to an SMS interface block; And The SMS interface block receives a subscriber information change command from the SMS interface unit, determines whether the command is a processing command corresponding to the additional service, and then transmits the subscriber information command to the corresponding additional service processing server. Message transmission method between SM and SC in the CDM intelligent network system, characterized in that the first to eight steps. The method of claim 2, If the subscriber information change command is not valid valid data in steps 1-6, steps 1-9 of transmitting, by the SMS interface unit in the SCP, a transmission failure message to the SCP interface unit in the SMS; The SCP interface unit in the SMS receives a transmission failure message from the SMS interface unit in the SCP and simultaneously reconfigures a subscriber information change command transmitted from the subscriber information processing apparatus into a packet form based on the TCP / IP protocol standard. step; And In the CDM intelligent network system, characterized in that the SCP interface unit in the SMS further comprises steps 1-11 of retransmitting the subscriber information change command to the SMS interface unit in the SCP and proceeding to steps 1-6 again. Method of transmitting a message between SMs and SCs. In the message transmission method from the SCP to the SMS in the CDMA intelligent network system, Step 2-1 of the SMS interface block in the SCP determining whether or not the subscriber subscriber information processing result data is input from the corresponding additional service processing server; If the subscriber information processing result data is not input from the additional service processing server in step 2-1, the SMS interface block proceeds to step 2-1 again, and the subscriber information processing is performed from the additional service processing server. If the result data is input, step 2-2 of the SMS interface block converting the subscriber information processing result data into the packet form of the SCP internal standard and outputting the result to the SMS interface unit; Step 2-3, wherein the SMS interface unit receives the subscriber information processing result data from the SMS interface block and attempts a TCP / IP socket connection to the SMS; A second step of checking whether the SMS interface unit successfully establishes a TCP / IP socket connection with the SMS; If the TCP / IP socket connection with the SMS fails in step 2-4, the SMS interface unit proceeds to step 2-4 again. If the TCP / IP socket connection with the SMS succeeds, the SMS interface unit A step 2-5 of constructing the subscriber information processing result data in the form of a packet based on the TCP / IP protocol specification and transmitting it to the SCP interface unit in the SMS; Step 2-6 of receiving, by the SCP interface unit within the SMS, the subscriber information processing result data in the form of a TCP / IP packet and determining whether the subscriber information processing result data is normal valid data; If the subscriber information processing result data is normal valid data in step 2-6, step 2-7 of the SCP interface unit converts the subscriber information processing result data into a packet of SMS internal standard and outputs it to the external interface block. ; And In step 2-8, the external interface block receives the subscriber information processing result data from the SCP interface unit, configures the data in the form of a packet based on the TCP / IP protocol, and transmits the data to the subscriber information processing apparatus. A method for transmitting messages between SMs and SCs in a CDA intelligent network system. The method of claim 4, wherein If the subscriber information processing result data is not valid valid data in step 2-6, step 2-9 of transmitting, by the SCP interface unit in the SMS, a transmission failure message to the SMS interface unit in the SCP; The SMS interface unit in the SCP receives the transmission failure message transmitted from the SCP interface unit in the SMS and reconstructs the subscriber information processing result data transmitted from the SMS interface block into a packet form based on the TCP / IP protocol standard. 2-10 steps; And In the CDMA intelligent network system, the SMS interface unit further includes steps 2-11 of retransmitting the subscriber information processing result data to the SCP interface unit in the SMS and then proceeding to steps 2-6 again. Message transmission method between SMs and SC.