KR101293458B1

KR101293458B1 - In-bound roaming service system for gsm service subscribers in a cdma service area and method for registering location and short message receving in the system

Info

Publication number: KR101293458B1
Application number: KR1020070005108A
Authority: KR
Inventors: 이기완; 김인석; 이성준; 김병모
Original assignee: 에스케이텔레콤 주식회사
Priority date: 2007-01-17
Filing date: 2007-01-17
Publication date: 2013-08-07
Also published as: KR20080067786A

Abstract

According to the present invention, when a SMDPP failure message is received in response to the SMDPP message transmitted from the LR to the CDMA exchange side, the GSM service retransmits the SMDPP message from the GLR to the CDMA exchange side to continuously perform location registration and short message incoming processing. The present invention relates to an inbound roaming service system in a CDMA service area for a subscriber and a method of registering a location and receiving a short message within the system, comprising a SIM card having an IMSI information for identifying a GSM subscriber and an algorithm required for GSM authentication. A CDMA mobile communication terminal, a CDMA switch performing a call access function, and a signal used in a CDMA network and a GSM network connected between a CDMA network and a GSM network to exchange signals between the two networks. GSM service comprising a gateway location register to perform the conversion of In an inbound roaming service system in a CDMA service area for a particle, the gateway location register transmits an SMDPP message to the CDMA exchange after performing a location registration procedure according to a location registration request of the terminal. If a SMDPP failure message is received from the CDMA exchange to the terminal indicating that the transmission of the data contained in the SMDPP message has failed, it is desirable to retransmit the SMDPP message to the CDMA exchange.

Inbound Roaming, SMDPP Messages, GLR, Resend

Description

IN-BOUND ROAMING SERVICE SYSTEM FOR GSM SERVICE SUBSCRIBERS IN A CDMA SERVICE AREA AND METHOD FOR REGISTERING LOCATION AND SHORT MESSAGE RECEVING IN THE SYSTEM}

1 and 2 are process diagrams for explaining a method of registering a location in a CDMA service area for a conventional GSM service subscriber.

3 is a process for explaining a method of receiving a short message in a CDMA service area for a conventional GSM service subscriber.

4 is a diagram illustrating the configuration of an inbound roaming service system in a CDMA service area for a GSM service subscriber according to the present invention.

5 is a processing diagram for explaining a location registration method in an inbound roaming service system according to an embodiment of the present invention;

6 is a flowchart illustrating a method of receiving a short message in an inbound roaming service system according to an embodiment of the present invention.

DESCRIPTION OF THE REFERENCE SYMBOLS

10. mobile communication terminal, 20. CDMA base station, 30. CDMA switchboard,

40.CDMA HLR, 50.GLR, 60.GSM HLR,

70. GSM SMSC, 80. GSM Switchboard

The present invention relates to an inbound roaming service system in a CDMA service area for a GSM service subscriber and a method of location registration and short message reception within the system, in particular, SMDPP failure in response to an SMDPP message transmitted from a GLR to a CDMA exchange side. Upon receipt of the message, an inbound roaming service system in the CDMA service area for the GSM service subscriber that allows the GLR to retransmit the SMDPP message to the CDMA exchange to continue registration and short message receipt processing. It relates to a location registration and a method of receiving a short message.

With the development of mobile communication technology, foreigners who have subscribed to the Global System for Mobile Communications (GSM) service enter Korea using CDMA (Code Division Multiple Access) method, and make voice calls and data to the terminals and numbers used in their home countries. Transmit and receive services can be provided, which are called inbound roaming services.

As described above, in order for a GSM service subscriber to receive inbound roaming service in a CDMA service area, a mobile communication terminal in which a subscriber identity module (SIM) card is inserted must perform location registration with a CDMA switch.

FIG. 1 is a flowchart illustrating a location registration method in a CDMA service area for a conventional GSM service subscriber. FIG. After acquiring the authentication vector through the GSM HLR, a short message delivery point to point protocol (SMDP) message including a RAND value is transmitted to the CDMA exchange to authenticate the mobile terminal requesting the location registration, and the SMDPP message is received. The CDMA exchange transmits a data burst message to the mobile communication terminal. If the mobile communication terminal does not receive the data burst message transmitted to the mobile communication terminal due to a problem in the wireless environment or the terminal, the CDMA switch exchanges the mobile communication terminal. In a SMDPP message that a response to a sent message was not received from To the GLR.

As described above, the GLR receiving the SMDPP message from the CDMA exchange, including the failure to receive a response from the mobile communication terminal, terminates the location registration procedure, and the mobile communication terminal not receiving the location registration result is relocated from the beginning. Registration will be performed.

As shown in FIG. 2, the SRES value received from the mobile communication terminal requesting the location registration is the same as the stored SRES value, and after receiving the subscriber information message by transmitting the location registration message to the GSM HLR, the CDMA The CDMA exchange which transmits the SMDPP message including the location registration result to the exchange, and the CDMA exchange receiving the SMDPP message transmits a response message including the location registration result to the mobile communication terminal. If the mobile communication terminal does not receive the response message sent to the communication terminal, the CDMA exchange transmits to the GLR by including in the SMDPP message that the response to the transmission message was not received from the mobile communication terminal, and from the mobile communication terminal from the CDMA exchange The GLR received an SMDPP message containing a no response from The location registration procedure is terminated, and the mobile communication terminal which does not receive the location registration result performs location registration again from the beginning.

Meanwhile, when a GSM service subscriber provided with inbound roaming service in a CDMA service area receives a short message from a GSM service subscriber located in a GSM service area, as shown in FIG. 3, the GSM SMSC is conventionally used in a CDMA service area. If there is a short message received by the subscriber of the GSM service receiving the inbound roaming service, the received short message is transmitted to the GLR, and the GLR converts the short message received from the GSM SMSC according to the CDMA network standard and then converts the short message. The message is included in the SMDPP message and transmitted to the CDMA exchange, and the CDMA exchange transmits the short message included in the SMDPP message received from the GLR to the mobile communication terminal. If the mobile communication terminal does not receive the short message sent to GSM SMSC receives an incoming message to see the statement fails, shall perform again a short message forwarding procedure from the beginning.

As described above, in the prior art, if a failure processing is performed on the SMDPP message transmitted from the GLR to the CDMA exchange side while performing location registration and short message reception processing for a GSM service subscriber receiving inbound roaming service in a CDMA service area, There is a problem in that registration and short message incoming processing must be performed again from the beginning.

The present invention has been made to solve the above-described problem, SMDPP in response to the SMDPP message transmitted from the GLR to the CDMA switch side when the location registration and short message reception for the GSM service subscriber receiving inbound roaming service in the CDMA service area Upon receiving a failure message, the inbound roaming service system in the CDMA service area and the GSM service subscriber to the GSM service subscriber to enable the GLR to retransmit the SMDPP message to the CDMA exchange to continue registration and short message reception. The purpose is to provide a location registration and a method of receiving a short message.

Inbound roaming service system in a CDMA service area for a GSM service subscriber according to an embodiment of the present invention for achieving the above object, there is provided a SIM card embedded with the IMSI information for identifying the GSM subscriber and the algorithm required for GSM authentication Equipped with a CDMA mobile communication terminal, a CDMA switch performing a call access function, and a signal used in a CDMA network and a GSM network connected between a CDMA network and a GSM network to exchange signals between the two networks. In an inbound roaming service system in a CDMA service area for a GSM service subscriber comprising a gateway location register for converting a signal, the gateway location register performs a location registration procedure according to a location registration request of the terminal. A predetermined time after sending an SMDPP message to the CDMA exchange. Receiving a SMDPP failure message indicating that the transmission of data contained in the SMDPP message from the CDMA exchange to the terminal has failed, it is preferable to retransmit the SMDPP message to the CDMA exchange.

Further, when the CDMA exchange receives an SMDPP message including an authentication vector value required for authentication of the terminal from the gateway location register, the CDMA exchange includes the authentication vector value included in the SMDPP message in a data burst message. In case that a response to the data burst message is not received from the terminal within a preset time, the SMDPP failure message is transmitted to the gateway location register.

When the CDMA exchange receives the SMDPP message including the location registration result from the gateway location register, the CDMA exchange includes the location registration result included in the SMDPP message in a data burst message and transmits the result to the terminal. If no response to the data burst message is received from the terminal in time, it is desirable to send the SMDPP failure message to the gateway location register.

On the other hand, the inbound roaming service system in the CDMA service area for the GSM service subscriber according to another embodiment of the present invention, CDMA mobile communication with a SIM card embedded with IMSI information for distinguishing the GSM subscriber and the algorithm required for GSM authentication A terminal, a CDMA switch that performs a call access function, and a connection between a CDMA network and a GSM network to convert a signal used in the CDMA network and a signal used in the GSM network to exchange signals between the two networks. An inbound roaming service system in a CDMA service area for a GSM service subscriber including a gateway location register, wherein the gateway location register receives a short message to be received from the GSM SMSC to the terminal and transmits the short message to the CDMA switch. Within a preset time after sending the SMDPP message containing the short message When receiving the failure SMDPP message that the SMS message transmission failure to the called terminal from the exchange CDMA, it is desirable to retransmit the SMDPP message to the CDMA exchange.

Further, when the CDMA exchange receives the SMDPP message including the short message from the gateway location register, the CDMA exchange includes the short message included in the SMDPP message in a data burst message and transmits the data to the terminal within a preset time. If not receiving a response to the data burst message from the terminal, it is preferable to send the SMDPP failure message to the gateway location register.

The SMDPP failure message may include a failure reason code for which a response is not received from the terminal.

The reason for not receiving the response from the terminal is preferably any one of the movement of the terminal, a problem in a wireless environment, and a problem in the terminal.

On the other hand, the location registration method in the inbound roaming service system according to an embodiment of the present invention, the location registration of the CDMA mobile terminal equipped with the SIM card embedded with the IMSI information for distinguishing the GSM subscriber and the algorithm required for GSM authentication Obtaining an authentication vector value from the GSM HLR at the gateway location register according to the request; Transmitting an authentication vector value for the terminal authentication among the authentication vector values in a SMDPP message to a CDMA exchange; If the CDMA exchange transmits the authentication vector value included in the SMDPP message in the data burst message to the terminal and fails to receive a response to the data burst message from the terminal within a predetermined time, the gateway Transmitting a SMDPP failure message indicating that the authentication vector value transmission to the terminal has failed to a location register; And retransmitting the SMDPP message including the authentication vector value from the gateway location register receiving the SMDPP failure message from the CDMA exchange to the CDMA exchange.

Furthermore, after the CDMA switch includes the authentication vector value in the data burst message and transmits the authentication vector value to the terminal, when receiving the SRES value calculated as the authentication vector value from the terminal within a preset time, the gateway location register is sent to the gateway location register. Transmitting a SMDPP message including the SRES value; The gateway location register compares the SRES value included in the SMDPP message received from the CDMA switch and the authentication vector value obtained from the GSM HLR, and if the two SRES values match, the GSM HLR for the terminal. Performing a location registration and transmitting a SMDPP message including a location registration result to the CDMA exchange; The gateway location if the CDMA exchange fails to receive a response to the data burst message from the terminal within a preset time after transmitting the location registration result included in the SMDPP message to the terminal by including the result in the data burst message; Transmitting an SMDPP failure message indicating that the location registration result transmission to the terminal has failed; And retransmitting the SMDPP message including the location registration result from the gateway location register to the CDMA exchange receiving the SMDPP failure message from the CDMA exchange.

Meanwhile, in the short message receiving method in the inbound roaming service system according to an embodiment of the present invention, the gateway location register transmits a short message that is received from the GSM SMSC to the GSM service subscriber receiving the inbound roaming service in the CDMA service area. Receiving the short message in a SMDPP message and sending the short message to a CDMA exchange; The gateway location when the CDMA exchange fails to receive a response to the data burst message from the terminal within a preset time after the short message included in the SMDPP message is included in the data burst message and transmitted to the terminal; Transmitting a SMDPP failure message indicating a failure in transmitting a short message to the terminal to the register; And upon retransmitting the SMDPP failure message from the CDMA exchange, retransmitting the SMDPP message including the short message from the gateway location register to the CDMA exchange.

Hereinafter, an inbound roaming service system in a CDMA service area for a GSM service subscriber according to a preferred embodiment of the present invention and a location registration and short message receiving method in the system will be described in detail with reference to the accompanying drawings.

4 is a road, a mobile communication terminal 10, a CDMA switch 30, a GLR 50, and a GSM HLR showing an exemplary configuration of an inbound roaming service system in a CDMA service area for a GSM service subscriber according to the present invention. 60, GSM Short Message Service Center (SMSC) 70.

In such a configuration, the mobile communication terminal 10 is a dedicated CDMA terminal into which a SIM card embedded with an International Mobile Station Identity (IMSI) information for distinguishing GSM subscribers and an algorithm required for GSM authentication is inserted. In order to transmit the location registration message including the IMSI information stored in the SIM card and the mobile identity number (MIN) information of the terminal through the CDMA base station 20 to the CDMA switch 30. When the RAND value is received from the CDMA switch 30, the received RAND value is transmitted to the SIM card inserted in the terminal 10, and the SIM card executes an authentication algorithm with the received RAND value, which is a result value. The terminal 10 calculates the SRES value and transmits the SRES value to the terminal. The terminal 10 receives the SRES value from the SIM card and transmits the SRES value to the data burst message and transmits the SRES value to the CDMA exchanger 30 through the CDMA base station 20.

The CDMA switch 30 is connected to the CDMA network to perform a call connection function, receives a location registration message from the mobile communication terminal 10 and transmits the location registration message to the GLR 50, and the mobile communication terminal 10 from the GLR 50. Upon receiving the SMDPP message including the RAND value required for authentication of the mobile station, the data burst message including the RAND value is transmitted to the mobile communication terminal 10 through the CDMA base station 20, but within the preset time. If a response to the data burst message reception is not received from the Rx, a SMDPP failure message indicating that the transmission has failed is transmitted to the GLR 50, indicating that the transmission has failed.

In addition, when the CDMA switch 30 receives the SMDPP message including the location registration result from the GLR 50, the CDMA switch 30 transmits the data burst message including the location registration result to the mobile communication terminal 10 through the CDMA base station 20. However, if a response to receiving a data burst message from the mobile communication terminal 10 is not received within a preset time, a SMDPP failure message indicating that the location registration result transmission to the mobile communication terminal 10 has failed is transmitted to the GLR 50. do.

In addition, when the CDMA switch 30 receives the SMDPP message including the short message from the GLR 50, the CDMA switch 30 includes the short message in the data burst message through the CDMA base station 20 and transmits the short message to the mobile communication terminal 10. If a response to the data burst message reception is not received from the mobile communication terminal 10 within a preset time, an SMDPP failure message indicating that the short message transmission to the mobile communication terminal 10 has failed is transmitted to the GLR 50.

In FIG. 4, the identification number 40 is a CDMA HLR that stores location information and service information of a CDMA service subscriber.

Meanwhile, the GLR 50 is connected between the CDMA network and the GSM network to convert the IS-41.MAP signal used in the CDMA network and the GSM MAP signal used in the GSM network so as to exchange signals between the two networks. And transmits the SMDPP message to the CDMA switch 30 during location registration and short message incoming processing for the GSM service subscriber who is provided with inbound roaming service in the CDMA service area, and then moves from the CDMA switch 30 within the predetermined time. When the SMDPP failure message indicating that the message transmission to the communication terminal 10 has failed is received, the SMDPP message is retransmitted to the CDMA switch 30 so that the location registration and short message incoming processing can be continued without interruption.

The GSM HLR 60 stores the location information and service information of the GSM service subscriber, and the GLR 50 according to the authentication vector value request to be used for authentication of the mobile communication terminal 10 requesting the location registration from the GLR 50. The authentication vector value used for authentication of the mobile communication terminal 10 is transmitted.

When the GSM SMSC 70 receives the short message through the GSM switch 80, the GSM SMSC 70 inquires the current location information of the called subscriber who receives the short message through the GSM HLR 60, and receives the call based on the location information of the called subscriber. If the subscriber is provided with inbound roaming service in the CDMA service area, the received short message is transmitted to the GLR 50 so that the short message can be delivered to the called subscriber located in the CDMA service area.

5 is a flowchart illustrating a location registration method in an inbound roaming service system according to an exemplary embodiment of the present invention.

First, when a GSM service subscriber moves to a CDMA service area and installs a SIM card in the dedicated CDMA mobile communication terminal 10, the mobile communication terminal 10 may use IMSI information stored in the SIM card and a dedicated CDMA mobile communication terminal ( The MIN information of 10) is included in the location registration message (data burst message format) and transmitted to the CDMA switch 30 through the CDMA base station 20 (S10).

Upon receiving the location registration message through the process S10, the CDMA switch 30 searches for the CDMA HLR 40 based on the IMSI information and the MIN information included in the location registration message, and then moves to the CDMA HLR 40. If there is no data for the communication terminal 10, a location registration message according to the IS-41.MAP standard is transmitted to the GLR 50 (S12).

The GLR 50 receiving the location registration message from the CDMA switch 30 through the process S12 transmits an authentication vector request message requesting the authentication vector to the GSM HLR 60 to perform subscriber authentication (S14). The GSM HLR 60 receiving the authentication vector request message from the GLR 50 transmits the authentication vector response message including the authentication vector values SRES and RAND to the GLR 50 according to the request of the GLR 50. (S16).

After receiving the authentication vector response message from the GSM HLR 60 through the process S16, the GLR 50 stores the authentication vector value included in the authentication vector response message in the memory area, and then stores the mobile communication terminal 10. In order to authenticate, the SMDDMA message including the RAND value is transmitted to the CDMA switch 30 (S18).

Meanwhile, the CDMA base station 20 includes the RDMA value included in the SMDPP message in the CDMA exchanger 30 that receives the SMDPP message including the RAND value from the GLR 50 through the process S18. Transmission to the mobile communication terminal 10 through (S20).

However, the mobile communication terminal 10 may not receive the data burst message transmitted to the mobile communication terminal 10 due to the movement of the terminal, the problem of the wireless environment, or the problem of the terminal.

Accordingly, after the data burst message including the RAND value is transmitted to the mobile communication terminal 10 through the process S20, the CDMA switch 30 responds to the data burst message transmitted to the mobile communication terminal 10. If the message waiting to receive the message, but for a reason as described above for not receiving a response to the reception of the data burst message from the mobile communication terminal 10 within a predetermined time, the CDMA switch 30 is the SMDPP of step S18 In response to the message, a failure reason code indicating a cause for not receiving a response from the mobile communication terminal 10 (Power Off, No Page Response, Radio Problem, Internal Error, etc.) is included in the SMDPP failure message to the GLR 50. It transmits (S22).

When the SMDPP failure message including the failure reason code is received from the CDMA switch 30 within the predetermined time through the process S22, the GLR 50 sends a RAND value to the CDMA switch 30 to continue the authentication process. The SMDPP message including the retransmission is performed (S24).

In the process S24, when the GLR 50 retransmits the SMDPP message including the RAND value to the CDMA exchanger 30, it is preferable that the GLR 50 does not retransmit the SMDPP message indefinitely, but retransmits only a predetermined number of times.

Meanwhile, the CDMA exchanger 30 having retransmitted the SMDPP message including the RAND value from the GLR 50 through the process S24 may include the RAND value included in the SMDPP message in the data burst message to provide the CDMA base station 20 with the RDMA value. It transmits to the mobile communication terminal 10 through (S26).

The mobile communication terminal 10 receiving the RAND value from the CDMA switch 30 through the process S26 transfers the received RAND value to the SIM card mounted in the terminal, and the SIM card received the RAND value is the RAND value. After the authentication algorithm is executed, the resultant SRES value is transmitted to the mobile communication terminal 10, and the mobile communication terminal 10 which has received the SRES value from the SIM card includes the SRES value in the data burst message to allow CDMA. The base station 20 transmits to the CDMA switch 30 (S28).

The CDMA exchanger 30 receiving the SRES value from the mobile communication terminal 10 through the process S28 includes the SRES value received from the mobile communication terminal 10 in the SMDPP message and transmits the SRES value to the GLR 50 (S30). ).

The GLR 50 receiving the SMDPP message including the SRES value from the CDMA switch 30 through the process S30 compares the SRES value stored in the memory area with the SRES value received from the CDMA switch 30. If the two SRES values match, since the mobile communication terminal 10 requesting the location registration is a valid subscriber, the location registration message is transmitted to the GSM HLR 60 (S32 and S34).

After receiving the location registration message from the GLR 50 through the process S34, the GSM HLR 60 recognizes that the GSM service subscriber is located in the CDMA service area and stores the current location information of the GSM service subscriber. 50) and transmits the subscriber information message including the subscriber information (S36), and the GLR 50 transmits a response message for receiving the subscriber information message to the GSM HLR 60 (S38), and transmits the subscriber information response message. The received GSM HLR 60 transmits a response message to the location registration message of step S34 to inform the GLR 50 that the location registration is completed (S40).

The GLR 50 receiving the location registration response message from the GSM HLR 60 through the process S40 transmits the SMDPP message including the location registration result to the CDMA switch 30 (S42).

The CDMA switch 30 receiving the SMDPP message including the location registration result from the GLR 50 through the process S42 includes the location registration result in the data burst message and transmits the mobile communication terminal 10 through the CDMA base station 20. (S44).

Accordingly, after the data burst message including the location registration result is transmitted to the mobile communication terminal 10 through the process S44, the CDMA switch 30 sends a data burst message to the mobile communication terminal 10. If the mobile terminal 10 fails to receive a response to the reception of the data burst message from the mobile communication terminal 10 within a predetermined time due to the above-described reason, the CDMA switch 30 waits to receive the response message. The failure reason code indicating the reason for not receiving the response is included in the SMDPP failure message and transmitted to the GLR 50 (S46).

When the SMDPP failure message including the failure reason code is received from the CDMA switch 30 within the predetermined time through the above-described process S46, the GLR 50 moves to the CDMA switch 30 to continue the location registration process. The SMDPP message including the registration result is retransmitted (S48).

The CDMA exchanger 30 which has retransmitted the SMDPP message including the location registration result from the GLR 50 through the process S48 includes the location registration result in the data burst message and transmits the mobile communication terminal 10 through the CDMA base station 20. (S50).

The mobile communication terminal 10 receiving the location registration result through the process S50 transmits a response message to the CDMA switch 30 (S52), and receives the response message from the mobile communication terminal 10 (CDMA 30). ) Transmits the response message to the SMDPP message of step S to the GLR 50 (S54), and the GLR 50 receiving the response message to the SMDPP message from the CDMA switch 30 has all the location registration procedures. A SMDPP message indicating completion is transmitted to the CDMA switch 30 (S56).

6 is a flowchart illustrating a method of receiving a short message in an inbound roaming service system according to an exemplary embodiment of the present invention.

First, when the GSM SMSC 70 receives the short message from the GSM service subscriber located in the GSM service area, the GSM SMSC 70 receives the short message through the GSM HLR 60 and the current location information of the called subscriber. After securing, if the called subscriber is provided with inbound roaming service in the CDMA service area, the received short message is included in the ForwardSM Message (FSM) message and transmitted to the GLR 50 (S60).

The GLR 50 having received the FSM message including the short message through the process S60 transmits the short message included in the FSM message to the CDMA exchanger 30 by including it in the SMDPP message (S62).

After receiving the SMDPP message including the short message from the GLR 50 through the above process S62, the CDMA switch 30 includes the short message included in the SMDPP message in the data burst message and performs mobile communication through the CDMA base station 20. Transmission to the terminal 10 (S64).

Accordingly, after transmitting the data burst message including the short message to the mobile communication terminal 10 through the process S64, the CDMA switch 30 responds to the data burst message transmitted to the mobile communication terminal 10. If the mobile communication terminal 10 fails to receive a response to the reception of the data burst message from the mobile communication terminal 10 within the predetermined time due to the above-described reason, the CDMA switch 30 waits for the reception of the message. A failure reason code indicating a cause for not receiving a response from the power off (No Page Response, Radio Problem, Internal Error, etc.) is included in the SMDPP message and transmitted to the GLR 50 (S66).

When the SMDPP failure message including the failure reason code is received from the CDMA switch 30 within the predetermined time through the above-described process S66, the GLR 50 sends the CLR switch 30 to the CDMA switch 30 to continue the short message incoming process. The SMDPP message including the short message is retransmitted (S68).

The CDMA exchanger 30 having retransmitted the SMDPP message including the short message from the GLR 50 through the process S68 moves the CDMA base station 20 by including the short message included in the SMDPP message in the data burst message. Transmission to the communication terminal 10 (S70).

The mobile communication terminal 10 receiving the short message from the CDMA switch 30 through the process S70 transmits a response message for receiving the short message to the CDMA switch 30 through the CDMA base station 20 (S72). .

The CDMA exchanger 30 receiving the response message for receiving the short message from the mobile communication terminal 10 through the process S72 indicates that the short message is received by the SMDPP message indicating that the mobile communication terminal 10 has received the short message. Included in the transmission to the GLR (50) (S74).

The GLR 50 receiving the SMDPP message including the short message incoming result from the CDMA exchange 30 through the process S74 transmits the short message incoming result to the GSM SMSC 70 in the FSM message (S76). .

The inbound roaming service system in the CDMA service area for the GSM service subscriber of the present invention and the method of location registration and short message reception within the system are not limited to the above-described embodiment and are within the scope of the technical idea of the present invention. Various modifications can be made.

According to the inbound roaming service system in the CDMA service area and the method of location registration and short message reception within the system, the GSM service provided with the inbound roaming service in the CDMA service area as described above. When the subscriber registers the location and receives the short message, if the SMDPP failure message is received in response to the SMDPP message transmitted from the GLR to the CDMA exchange, the GLR retransmits the SMDPP message to the CDMA exchange to continuously register the location and receive the short message. By doing so, it is possible to continuously perform location registration and short message incoming processing interrupted due to a problem in the wireless environment and the terminal, thereby improving the quality of the roaming service.

Claims

A CDMA mobile terminal equipped with a SIM card having an IMSI information for distinguishing GSM subscribers and an algorithm required for GSM authentication, a CDMA switch performing a call access function, and a connection between the CDMA network and the GSM network, between the two networks An inbound roaming service system in a CDMA service area for a GSM service subscriber, comprising a gateway location register for converting a signal used in a CDMA network and a signal used in a GSM network to exchange signals.

The gateway location register,

During the location registration procedure according to the location registration request of the terminal, after transmitting a SMDPP message to the CDMA exchange, it is determined that the transmission of data contained in the SMDPP message from the CDMA exchange to the terminal within a preset time has failed. Informing a SMDPP failure message, and retransmitting the SMDPP message to the CDMA exchange.

The method of claim 1, wherein the CDMA exchanger,

Upon receiving the SMDPP message including the authentication vector value required for authentication of the terminal from the gateway location register, the authentication vector value included in the SMDPP message is included in a data burst message and transmitted to the terminal. And if the MS does not receive a response to the data burst message from the terminal, the SMDPP failure message is transmitted to the gateway location register.

The method of claim 1, wherein the CDMA exchanger,

When the SMDPP message including the location registration result is received from the gateway location register, the location registration result included in the SMDPP message is included in a data burst message and transmitted to the terminal, but the data is transmitted from the terminal within a predetermined time. And if it does not receive a response to the burst message, sends the SMDPP failure message to the gateway location registrar.

A CDMA mobile terminal equipped with a SIM card having an IMSI information for distinguishing GSM subscribers and an algorithm required for GSM authentication, a CDMA switch performing a call access function, and a connection between the CDMA network and the GSM network, between the two networks An inbound roaming service system in a CDMA service area for a GSM service subscriber including a gateway location register for converting a signal used in a CDMA network and a signal used in a GSM network to exchange signals. ,

The gateway location register,

SMDPP failure indicating a failure of transmitting a short message from the CDMA switch to the terminal within a predetermined time after receiving a short message to be received from the GSM SMSC to the terminal and transmitting the SMDPP message including the short message to the CDMA exchange. And upon receipt of the message, retransmit the SMDPP message to the CDMA exchange.

The method of claim 4, wherein the CDMA exchanger,

Upon receiving the SMDPP message including the short message from the gateway location register, the short message included in the SMDPP message is transmitted to the terminal by including the short message in the data burst message, and the data burst message is transmitted from the terminal within a predetermined time. And if it does not receive a response, transmits the SMDPP failure message to the gateway location registrar.

The method according to any one of claims 1 to 5, wherein the SMDPP failure message,

An inbound roaming service system in a CDM service area for a GSM service subscriber, characterized in that it comprises a failure reason code that has not received a response from the terminal.

The method of claim 6, wherein the cause of not receiving a response from the terminal is:

Inbound roaming service system in the CD service area for the GSM service subscriber, characterized in that any one of the movement of the terminal, a problem of the wireless environment, the problem of the terminal.

Acquiring an authentication vector value from a GSM HLR at a gateway location register according to a location registration request of a CDMA mobile terminal equipped with an IMSI information identifying a GSM subscriber and a SIM card with an algorithm required for GSM authentication;

Transmitting an authentication vector value for the terminal authentication among the authentication vector values in a SMDPP message to a CDMA exchange;

After the CDMA exchange includes the authentication vector value included in the SMDPP message in the data burst message and transmits the authentication vector value to the terminal, the CDMA exchange fails to receive a response to the data burst message from the terminal within a preset time. Sending a SMDPP failure message to the gateway location register indicating that the authentication vector value transmission to the terminal has failed;

And retransmitting the SMDPP message including the authentication vector value from the gateway location register to the CDMA exchange receiving the SMDPP failure message from the CDMA switch.

10. The method of claim 8, wherein the CDMA exchange includes the authentication vector value in the data burst message and transmits the authentication vector value to the terminal. Transmitting a SMDPP message including the SRES value to a gateway location register;

The gateway location register compares the SRES value included in the SMDPP message received from the CDMA switch and the SRES value stored in a memory area, and if the two SRES values match, the position of the terminal with the GSM HLR. Performing a registration and transmitting a SMDPP message including a location registration result to the CDMA exchange;

The gateway location if the CDMA exchange fails to receive a response to the data burst message from the terminal within a preset time after transmitting the location registration result included in the SMDPP message to the terminal by including the result in the data burst message; Transmitting an SMDPP failure message indicating that the location registration result transmission to the terminal has failed;

Retransmitting the SMDPP message including the location registration result from the gateway location register to the CDMA exchange receiving the SMDPP failure message from the CDMA switch. How to register your location.

When the gateway location register receives a short message received from a GSM SMSC to a GSM service subscriber receiving inbound roaming service in a CDMA service area, including the short message in an SMDPP message and transmitting the short message to a CDMA exchange;

If the CDMA exchange includes the short message included in the SMDPP message in a data burst message and transmits the short message to a CDMA mobile terminal, and fails to receive a response to the data burst message from the terminal within a preset time; Transmitting a SMDPP failure message indicating a failure of short message transmission to the terminal to a gateway location register;

Retransmitting the SMDPP message including the short message from the gateway location register to the CDMA exchange upon receiving the SMDPP failure message from the CDMA switch.