KR100481630B1 - Method of Servicing Short Message among the Different Mobile Telecommunication Networks - Google Patents

Abstract

The present invention relates to a short service method in a heterogeneous mobile communication network to provide a short service through interworking between different generations of mobile communication networks, and receives a short message from an originating subscriber in a heterogeneous mobile communication network and receives a short message belonging to another generation of mobile communication networks. Identifying the short message to be transmitted to the subscriber, converting the short message into a protocol used in another generation's mobile communication network, and transmitting the short message converted to the corresponding subscriber to the corresponding subscriber. The service can be supported without any problems.

Description

Short service method in heterogeneous mobile communication network {Method of Servicing Short Message among the Different Mobile Telecommunication Networks}

The present invention relates to a short service method in a heterogeneous mobile communication network, and more particularly, to a short service method in a heterogeneous mobile communication network to provide a short service through interworking between different generations of mobile communication networks.

A configuration for short service in a general mobile communication network includes a mobile subscriber 11, a BSC 12, an MSC 13, an HLR 14, and an SMC 15, as shown in FIG. It consists of

Here, the MSC 13 and the HLR 14 are directly connected, and the HLR 14 and the SMC 15 are also directly connected. If the mobile subscriber 11 wants to provide a short service, the mobile subscriber 11 The MSC (13) belongs to the direct link with the HLR (14) and the SMC (15) is configured to provide a short service through the MAP standard used in the mobile communication network.

A more detailed description of the short service is as follows.

First, when the mobile subscriber 11, that is, the originating subscriber (Originator Serving Subscriber) originates a short message, the short message is transmitted to the MSC 13 to which the mobile subscriber 11 belongs, and the MSC 13 is a BSC ( 12) the short message received through the MAP standard is transmitted to the SMC 15.

Accordingly, the SMC 15 receives the short message from the MSC 13 and checks the number of the called subscriber (not shown in the figure for convenience of description) and called according to the called subscriber number. The inquiry of the subscriber information is requested to the HLR 14.

Accordingly, the HLR 14 inquires the receiver subscriber information stored in the internal database according to the request for the inquiry of the subscriber subscriber information received from the SMC 15, and then transmits the corresponding subscriber subscriber information to the SMC 15. give.

Then, the SMC 15 checks the called party information received from the HLR 14 and receives the short message received from the MSC 13 as an MSC (not shown in the figure for convenience of description) to which the called party belongs. Send it. The MSC to which the called party belongs transmits the short message received through the SMC 15 to the called party.

However, due to the development of technology and the demand of subscribers, the recommendation or the generation of the switching network has changed, and other generations of mobile networks such as 2nd generation mobile networks and 3rd generation mobile networks have emerged. Because it has short access-related standards and interworking methods, it is possible to process short messages only in its own generation standard. Therefore, it is not possible to receive short service between mobile subscribers belonging to different generations of mobile communication networks.

For example, in the 2nd generation mobile communication network, short processing is possible only within the 2nd generation standard (e.g., Interim Standard (IS) -41.C), and in the 3rd generation mobile communication network, GSM (Global System for Mobile Communications), As it complies with standards such as 3rd Generation Partnership Project (3GPP), outgoing subscribers roaming on 2nd generation mobile communication network cannot provide short-term service to incoming subscribers registered in 3rd generation mobile communication network. An outgoing subscriber whose location is registered at cannot provide a short message service to a called subscriber roaming on a second generation mobile network, and an outgoing subscriber roaming on a second generation mobile network is a short message to a called subscriber roaming on a third generation mobile communication network. There was a problem such as not being able to provide services.

In other words, the conventional technology cannot provide a short service in a heterogeneous mobile communication network.

In order to solve the above problems, an object of the present invention is to provide a short service in a heterogeneous mobile communication network.

In addition, an object of the present invention is to provide a short service without any problem through the interworking between mobile communication networks of different generations when the mobile subscriber roams to the mobile communication network of different generations.

Another object of the present invention is to provide a short message service to a called subscriber of another generation roaming in an arbitrary mobile communication network and having a location registered in another generation of mobile communication networks.

In addition, another object of the present invention is to provide a short message service to a calling subscriber of another generation roaming to another generation of mobile communication network.

In addition, another object of the present invention is to provide a short message service to another generation of the called subscriber roaming in any mobile communication network to the other subscriber of the other generation roaming in the mobile communication network.

Another object of the present invention is to retransmit a short message to an originating subscriber of another generation roaming to an arbitrary mobile communication network after a short message transmission failure.

A feature of the present invention for achieving the above object is to receive a short message from a calling subscriber in a heterogeneous mobile communication network and to confirm whether it is a short message to be transmitted to a called subscriber belonging to a mobile communication network of another generation, thereby transferring the short message to another generation. In a short service method in a heterogeneous mobile communication network in which a protocol converted short message is transmitted to a called subscriber by converting it into a protocol used in a communication network, a parameter in a short message delivery point (SMDP) message is mapped using a Roaming Gate Way (RGW). (Mobile Application Part) Mapping to MO (Mobile Origination) short parameter or mapping MAP MT (Mobile Termination) short parameter to SMDPP message parameter to perform SMS (Short Message Service) interworking in heterogeneous communication network Transmitting a process; If the short transmission fails, after performing the location registration procedure of the called party, the database is searched to check the availability status of the called party memory and the Short Message Center (SMC) address. Requesting a short message and retransmitting the short message to the called subscriber.

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Preferably, the database may include information on activation of the mobile subscriber, information on the memory capacity of the mobile subscriber, subscriber number information indicating that the short message has been received, and SMC address information on which the short transmission has failed.

Also, preferably, the step of retransmitting the short message to the called subscriber confirms an attempt to register a location from the called subscriber in the called MSC (Mobile Switching Center) when the short message to be sent to the called subscriber cannot be transmitted due to a communication failure. Checking the current status of the called subscriber; Transmitting an SMS message waiting indication parameter to a home location register (HLR) by including an SMS message waiting indication parameter in a location registration message when the memory of the called subscriber is available; Checking the presence or absence of an SMC address stored in a database after performing a location registration procedure in the HLR and requesting short retransmission to the SMC corresponding to the address; Generating, by the SMC, a MAP routing information request message for obtaining the address of the destination MSC and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR, and including the address of the destination MSC in the response message and returning it to the SMC; Identifying, at the SMC, a destination MSC address from the response message of the HLR, including the short message in the MAP MT short message, and retransmitting it to the RGW; Receiving the MAP MT short message from the SMC in the RGW and converting the MAP MT short protocol into an SMDPP message protocol used in another generation of mobile communication networks; And receiving the SMDPP message from the RGW at the called MSC, checking the called subscriber number and resending the short message to the called subscriber.

Alternatively, the short transmission process may be performed by an originating MSC in response to a SMDPP message when a different generation of originating subscribers roaming in a mobile communication network transmits a short message to a destination subscriber that is located in another generation of mobile communications network. Carrying it; Receiving the SMDPP message at the RGW and converting the SMDPP message protocol into a MAP MO short protocol used in another generation of mobile communication networks; Receiving a MAP MO short message from the RGW in an SMC in another generation of mobile communication network, generating a response message for the corresponding MAP MO short message, and transmitting the MAP MO short message to the calling subscriber through the RGW; Generating, by the SMC, a MAP routing information request message for obtaining an address of the destination MSC and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR and including the destination MSC address in a response message and returning the message to the SMC; Confirming, by the SMC, the destination MSC address from the response message of the HLR, including the short message in the MAP MT short message, and sending the short message to the destination MSC; The destination MSC checks the International Mobile Subscriber Identity (IMSI) or Local Mobile Station Identity (LMSI) from the MAP MT short message, and includes the IMSI or LMSI in the MAP destination information request message and transmits the message to the destination VLR (Visitor Location Register). Steps; Inquiring of called subscriber information in a database by the called VLR and including a called mobile station international ISDN number in a response message and returning it to the called MSC; And confirming the destination MSISDN from the response message of the destination VLR at the destination MSC and transmitting the short message to the destination subscriber.

Preferably, the short transmission process is performed when the error occurs during the processing of the MAP routing information request message, when the incoming MSISDN and the MSISDN to notify that the short incoming call are different from each other, or the memory pool of the called subscriber, in the HLR. Storing and managing the SMC address and the terminal status information in a database, and including the current terminal status information and the MSISDN notification information of the called subscriber together in a MAP information service center message to notify the SMC. .

Alternatively, the short transmission process may include the SMC address from the short message in the outgoing MSC when the outgoing subscriber that is located in any mobile communication network sends a short message to the destination subscriber of another generation that is roaming in another generation of mobile communication network. Checking and transmitting the SMC address in a MAP origination information request message; Receiving, by the VLR, the MAP origination information request message and inquiring outgoing subscriber information in the database, including the originating MSISDN in the response message and returning it to the originating MSC; Sending, by the sending MSC, the MAP MO short message to the SMC together with the short message, and generating a response message to notify the calling subscriber that the short message has been sent; Generating, by the SMC, a MAP routing information request message for obtaining an address of a destination MSC in another generation of mobile communication networks and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR, and including the address of the destination MSC in the response message and returning it to the SMC; Confirming, by the SMC, the destination MSC address from the response message of the HLR, including the short message in the MAP MT short message and sending the short message to the RGW; Receiving the MAP MT short message from the SMC in the RGW and converting the MAP MT short protocol into an SMDPP message protocol used in another generation of mobile communication networks; Receiving the SMDPP message from the RGW at the called MSC and checking the called subscriber number to transmit the short message to the called subscriber.

Further, the short message transmission process may include transmitting a short message in an SMDPP message in an outgoing MSC when the outgoing subscriber of another generation roaming in a certain mobile communication network sends a short message to another incoming subscriber of another generation. ; Receiving the SMDPP message at the RGW and converting the SMDPP message protocol into a MAP MO short protocol used in another generation of mobile communication networks; Receiving a MAP MO short message from the RGW in an SMC in another generation of mobile communication network, generating a response message for the corresponding MAP MO short message, and transmitting the MAP MO short message to the calling subscriber through the RGW; Generating, by the SMC, a MAP routing information request message for obtaining an address of the destination MSC and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR, and including the address of the destination MSC in the response message and returning it to the SMC; Confirming, by the SMC, the destination MSC address from the response message of the HLR, including the short message in the MAP MT short message and sending the short message to the RGW; Receiving the MAP MT short message from the SMC in the RGW and converting the MAP MT short protocol into an SMDPP message protocol used in another generation of mobile communication networks; Receiving the SMDPP message from the RGW at the called MSC and checking the called subscriber number to transmit the short message to the called subscriber. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the heterogeneous mobile communication network according to an exemplary embodiment of the present invention, the configuration for the short service is illustrated in FIG. 2, in which the mobile subscribers 21 and 71, the base station BTS 22 and the node ratio 72, and the base station controller are provided. BSC 23 and RNC 73, core networks 30 and 60 of different generations, HLR 40 as a home location register, and RGW 50 to perform heterogeneous protocol conversion processing functions. Is done. Here, the first core network 30 describes a second generation mobile communication network using the IS-41.C protocol as an example, and the second core network 60 uses a third generation mobile communication network using the 3GPP / GSM protocol as an example. For example, it should be understood that the present invention is not limited thereto, but is applicable to all heterogeneous mobile communication networks.

The core network 30, 60 includes VLRs 31, 61 and MSCs 32, 62, respectively, and the second core network 60 further comprises an SMC 63 providing short text. In addition, since the protocols used in the different generation core networks 30 and 60 are different from each other, when providing a short service, a function for converting the corresponding protocols to be used by the other party is required. The HLR 40 and the RGW 50 may be configured to support a short message by distributing IIFs 41 and 51 that are responsible for converting functions of different protocols. That is, the MAP signal processing interworking related to the HLR 40 is supported by the IIF 41 in the HLR 40, and the protocol interworking for transmitting a short message is supported by the IIF 51 in the RGW 50. do.

In addition, the configuration for the short service in the heterogeneous mobile communication network according to an embodiment of the present invention further comprises a database (not shown in the drawings for convenience of description) for supporting the short service. Mobile Station Not Reachable Flag, which indicates information about activation, Mobile Station Memory Capacity Exceeded Flag, which indicates information about the memory capacity of a mobile subscriber, and the subscriber number indicating that a short message has been received. MSISDN notification information indicating (MSISDN-Alert), SMC address information indicating the address of the short message service failed to transmit the short message is made.

A short service method in a heterogeneous mobile communication network according to an embodiment of the present invention will be briefly described with reference to the flowchart of FIG. 3.

First, when any mobile subscriber transmits a short message through any mobile communication network, the transmitted short message is transmitted to the originating MSC through the base station controller through the base station to which the corresponding calling subscriber belongs (step S1). The MSC checks the called party number from the short message received through the base station controller to determine whether the called party corresponding to the number is a member of its own network or a member of another generation of mobile communication network. Step S2).

At this time, in the second step (S2), if the incoming subscriber belonging to its own network, the short service is performed in the same manner as in the prior art, so the description thereof is omitted (step S3).

On the other hand, in the second step (S2), in case of the called subscriber belonging to another generation of mobile communication network, the short message received through the base station controller is transmitted to the RGW, and in this RGW, the short message is transferred to another generation. The protocol is converted to match the protocol used in the communication network, and the protocol-transformed short message is transmitted to another generation mobile communication network (step S4).

Accordingly, the destination MSC in another generation of mobile communication network transmits the short message protocol converted in the RGW to the called subscriber through the base station controller and the base station to which the called subscriber belongs (step S5).

For example, in the case of a short service from a 2nd generation mobile communication network to a 3rd generation mobile communication network, the MAP MO short message (MAP-MO) used in the 3rd generation mobile communication network may use parameters in the SMDPP message used in the 2nd generation mobile communication network using the RGW. -FORWARD-SHORT-MESSAGE) to provide SMS interworking service by mapping with parameter. On the other hand, in the case of a short service from the third generation mobile communication network to the second generation mobile communication network, using the RGW, parameters in the MAP MT short message (MAP-MT-FORWARD-SHORT-MESSAGE) used in the third generation mobile communication network are transferred to the second generation mobile communication network. SMS interworking service is provided by mapping to parameters of SMDPP message used in communication network.

However, when a short message transmission fails due to a communication failure or the like while attempting to transmit a short message by the above-described operation, the called MSC searches the database after performing the location registration procedure of the called subscriber to search for the called subscriber. Check the current status.

Accordingly, when the memory of the called subscriber is available, the SMC searches the database to check whether the SMC address is stored and requests a short message to the SMC corresponding to the address. Retransmission to the called party.

Referring to the short service method in a heterogeneous mobile communication network according to an embodiment of the present invention in more detail as follows.

As a first example, a short service method for a case in which a mobile subscriber of another generation roams in a mobile communication network transmits a short message to a mobile subscriber that is registered in another generation of mobile communication network is illustrated in FIGS. 4 and 5. Referring to the flow chart as follows.

First, third generation mobile subscriber 21 subscribed to another generation of originating subscriber (eg, second core network 60) roaming on any mobile communication network (eg, first core network 30). ) Sends a short message to the originating MSC 32 via the BTS 22 and the BSC 23 by using a short message delivery request (SMD-REQ) message, the originating MSC 32 transmits the short message to the corresponding BSC (23). The SMDPP message is transmitted to the RGW 50 together with the short message received through the C-T.

Accordingly, the RGW 50 receives the SMDPP message from the originating MSC 32 and moves the corresponding SMDPP message protocol (eg, IS-41.C protocol) by another internal IIF 51 to another generation. Converts to a MAP MO short protocol (e.g., 3GPP / GSM protocol) used in a communication network (e.g., the second core network 60), i.e., as shown in FIG. ) Maps the parameters of the SMDPP message received from the MAP MO to the parameters of the MAP MO short (MAP-MO-FORWARD-SHORT-MESSAGE) used in the second core network 60 to map the MAP MO short (MAP-MO-FORWARD-SHORT). -MESSAGE) to the SMC 63 in the second core network 60.

Then, the SMC 63 stores the MAP MO short message (MAP-MO-FORWARD-SHORT-MESSAGE) received from the RGW 50, and at the same time, responds to the corresponding MAP MO short message (MAP-MO-FORWARD). -SHORT-MESSAGE ack) is generated and transmitted to the RGW (50).

Accordingly, the RGW 50 receives a MAP MO short response message (MAP-MO-FORWARD-SHORT-MESSAGE ack) from the SMC 63 and generates a response message (smdpp [ACK]) for the SMDPP message. Transmits to the originating MSC 32, and the originating MSC 32 receives a SMDPP response message (smdpp [ACK]) from the RGW 50, and responds to the SMD-REQ message (SMD-Ack). By generating a to inform the calling subscriber 21 that the short message has been sent.

In addition, the SMC 63 receives a MAP received from the RGW 50 to obtain routing information to the second core network 60, that is, an address of the destination MSC 62 in the second core network 60. Check the called party number from the MAP-MO-FORWARD-SHORT-MESSAGE, and generate the MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) based on the called party number. The subscriber 71 is transmitted to the HLR 40 managing.

Accordingly, the HLR 40 receives a MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) from the SMC 63 by an IIF 41 therein and is stored in an internal database. After inquiring MSC information, a response message (MAP-SEND-ROUTING-INFO-FOR-SM ack) for the MAP routing information request message is generated and the called subscriber 71 is located in the corresponding response message. The address of the MSC 62 is included and returned to the SMC 63.

At this time, the HLR 40 whether an error occurred while processing the MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) received from the SMC 63, or the incoming MSISDN (Mobile Station International) ISDN Number) and MSISDN to notify the short message are different or whether the memory is not available by the memory pool of the called party 71. In this case, SMC (63) by putting the current terminal status information (Not Reachable or Memory Capacity Exceed) and MSISDN notification information (MSISDN-Alert) of the called subscriber 71 in a MAP information service center message (MAP-INFORM-SERVICE-CENTER) ) To indicate that an error has occurred.

In particular, when an error occurs while processing the MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) received from the SMC 63, the HLR 40 in the database, the SMC address and the terminal state Store and manage your information.

Accordingly, the SMC (63) checks the destination MSC address from the MAP routing information response message (MAP-SEND-ROUTING-INFO-FOR-SM ack) received from the HLR (40), and from the RGW (50) The received short message is included in the MAP MT short message (MAP-MT-FORWARD-SHORT-MESSAGE) and transmitted to the destination MSC 62 using the identified destination MSC address.

Then, the incoming MSC 62 receives a MAP MT short message (MAP-MT-FORWARD-SHORT-MESSAGE) from the SMC 63 to check an International Mobile Subscriber Identity (IMSI) or a Local Mobile Station Identity (LMSI). Along with the IMSI or the LMSI, a MAP incoming information request message (MAP-SEND-INFO-FOR-MT-SMS) is loaded and transmitted to the incoming VLR 61.

Accordingly, the called VLR 61 receives a MAP called information request message (MAP-SEND-INFO-FOR-MT-SMS) from the called MSC 62 and receives the called subscriber information (ie, called) stored in an internal database. After querying the MSISDN, a response message (MAP-SEND-INFO-FOR-MT-SMS ack) for the MAP incoming information request message is generated and the called MSISDN is included in the response message to the called MSC 62. Return it.

Accordingly, the destination MSC 62 receives the MAP incoming information response message (MAP-SEND-INFO-FOR-MT-SMS ack) from the destination VLR 61 and confirms the destination MSISDN, and the SMC 63 The short message received from the RNC 73 and the node ratio 72 are transmitted to the called subscriber 71 corresponding to the called MSISDN.

In addition, the called subscriber 71 receives a short message transfer from the called MSC 62, generates a short message transfer ack, and returns it to the called MSC 62. The destination MSC 62 generates a response message (MAP-MT-FORWARD-SHORT-MESSAGE ack) for the MAP MT short message and transmits it to the SMC 63.

As a second example, a short service method for a case in which a mobile subscriber located in an arbitrary mobile communication network sends a short message to another mobile subscriber who is roaming in another mobile communication network is illustrated in FIGS. 7 and 8. Referring to the flow chart as follows.

First, the originating subscriber 71, which is located in any mobile communication network (e.g., the second core network 60), is sent to the originating MSC 62 via the node ratio 72 and the RNC 73. When the short message transfer is transmitted, the originating MSC 62 checks the SMC address from the short message transfer received through the RNC 73, and together with the SMC address, the MAP origination information request message ( MAP-SEND-INFO-FOR-MO-SMS) is transmitted to the originating VLR 61.

Accordingly, the originating VLR 61 receives the MAP origination information request message (MAP-SEND-INFO-FOR-MO-SMS) from the originating MSC 62, that is, the originating subscriber information (that is, origination) stored in an internal database. After querying the MSISDN, it generates a response message (MAP-SEND-INFO-FOR-MO-SMS ack) for the MAP origination information request message and includes the originating MSISDN in the response message to the originating MSC 62. Return it.

Accordingly, the originating MSC 62 receives a MAP origination information response message (MAP-SEND-INFO-FOR-MO-SMS ack) from the originating VLR 61 and the originating subscriber 71 receives the second core. After confirming that the subscriber is registered in the network 60, the SMC 63 performs a MAP MO short message (MAP-MO-FORWARD-SHORT-MESSAGE) together with the short message transfer received through the RNC 73. Send to.

Then, the SMC 63 stores the MAP MO short message (MAP-MO-FORWARD-SHORT-MESSAGE) received from the originating MSC 62, and simultaneously responds to the corresponding MAP MO short message (MAP-MO-). FORWARD-SHORT-MESSAGE ack) is generated and sent to the originating MSC 62.

Accordingly, the originating MSC 62 receives a MAP MO short response message (MAP-MO-FORWARD-SHORT-MESSAGE ack) from the SMC 63 to generate a short message transfer ack for the short message. The calling subscriber 71 is notified that the short message has been sent.

In addition, the SMC 63 obtains routing information for another generation of mobile communication networks (for example, the first core network 30), that is, an address of the destination MSC 32 in the first core network 30. Confirms the called party number from the MAP MO short message received from the originating MSC 62, and based on the called party number, the MAP routing information request message (MAP-SEND-ROUTING); -INFO-FOR-SM is generated and transmitted to the HLR 40 managing the called party 21.

Accordingly, the HLR 40 receives a MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) from the SMC 63 by an IIF 41 therein and is stored in an internal database. After inquiring MSC information, a response message (MAP-SEND-ROUTING-INFO-FOR-SM ack) for the MAP routing information request message is generated and the called subscriber 21 is located in the corresponding response message. The address of the MSC 32 is included and returned to the SMC 63.

At this time, the HLR 40 indicates that an error occurs while processing the MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) received from the SMC 63, or the short-term reception with the incoming MSISDN. Check whether the MSISDN to be notified is different or if the corresponding memory is not available by the memory pool of the called party 21. In this case, the current terminal state information of the called party 21 is not reachable. or Memory Capacity Exceed) and the MSISDN notification information (MSISDN-Alert) are transmitted together with the MAP information service center message (MAP-INFORM-SERVICE-CENTER) to the SMC 63 to inform that an error has occurred.

In particular, when an error occurs while processing the MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) received from the SMC 63, the HLR 40 in the database, the SMC address and the terminal state Store and manage your information.

Accordingly, the SMC 63 checks the destination MSC address from the MAP routing information response message (MAP-SEND-ROUTING-INFO-FOR-SM ack) received from the HLR 40, and the originating MSC 62. The received short message is included in the MAP MT short message (MAP-MT-FORWARD-SHORT-MESSAGE) and transmitted to the RGW 50 using the identified destination MSC address.

Then, the RGW 50 receives the MAP MT short message (MAP-MT-FORWARD-SHORT-MESSAGE) from the SMC 63 and the corresponding MAP MT short protocol by the internal IIF 51 (for example, 3GPP). / GSM protocol) is converted to the SMDPP message protocol (e.g., IS-41.C protocol) used in the first core network 30, i.e., as shown in Figure 9, the SMC 63 The MAP MT short (MAP-MT-FORWARD-SHORT-MESSAGE) received from the MAP MT to map the parameters of the SMDPP message used in the first core network 30 by mapping the SMDPP message to the first core network (30) It transmits to the destination MSC 32 in the network.

Accordingly, the called MSC 32 receives the SMDPP message from the RGW 50, checks the called subscriber number that is roaming in the first core network 30, and transmits the received short message from the RGW 50 to the SMD- message. The REQ message is transmitted to the called party 21 corresponding to the called party number via the BSC 23 and the BTS 22.

Accordingly, the called subscriber 21 receives the SMD-REQ message from the called MSC 32, generates a response message (SMD-Ack), and returns the received message to the called MSC 32. The MSC 32 generates a response message (smdpp [ACK]) to the SMDPP message and transmits it to the RGW 50.

Then, the RGW 50 receives the SMDPP response message (smdpp [ACK]) from the destination MSC 32 and protocol converts the MAP MT short response message (MAP-) as described above by the internal IIF 51. MT-FORWARD-SHORT-MESSAGE ack) is transmitted to the SMC 63.

As a third example, a short service method for a case in which a mobile subscriber of another generation roams in an arbitrary mobile communication network sends a short message to another mobile subscriber of another generation roaming in the mobile communication network is illustrated in FIGS. 4 and 8. Referring to the flow chart of the following.

First, third generation mobile subscriber 21 subscribed to another generation of originating subscriber (eg, second core network 60) roaming on any mobile communication network (eg, first core network 30). If a) transmits a short message to the originating MSC 32 via the BTS 22 and the BSC 23 using the SMD-REQ message, the originating MSC 32 receives the short message received through the corresponding BSC 23. Along with the SMDPP message to the RGW 50.

Accordingly, the RGW 50 receives the SMDPP message from the originating MSC 32 and moves the corresponding SMDPP message protocol (eg, IS-41.C protocol) by another internal IIF 51 to another generation. Converts to a MAP MO short protocol (e.g., 3GPP / GSM protocol) used in a communication network (e.g., the second core network 60), i.e., as shown in FIG. ) Maps the parameters of the SMDPP message received from the MAP MO to the parameters of the MAP MO short (MAP-MO-FORWARD-SHORT-MESSAGE) used in the second core network 60 to map the MAP MO short (MAP-MO-FORWARD-SHORT). -MESSAGE) to the SMC 63 in the second core network 60.

Then, the SMC 63 stores the MAP MO short message (MAP-MO-FORWARD-SHORT-MESSAGE) received from the RGW 50, and at the same time, responds to the corresponding MAP MO short message (MAP-MO-FORWARD). -SHORT-MESSAGE ack) is generated and transmitted to the RGW (50).

Accordingly, the RGW 50 receives a MAP MO short response message (MAP-MO-FORWARD-SHORT-MESSAGE ack) from the SMC 63 and generates a response message (smdpp [ACK]) for the SMDPP message. Transmits to the originating MSC 32, and the originating MSC 32 receives a SMDPP response message (smdpp [ACK]) from the SMC 63 and responds to the SMD-REQ message (SMD-Ack). By generating a to inform the calling subscriber 21 that the short message has been sent.

In addition, the SMC 63 denotes routing information to the first core network 30, that is, 32 'to distinguish it from an incoming MSC in the first core network 30 (hereinafter, referred to as the outgoing MSC 32). In order to obtain the address of the MAP MO, the destination subscriber number is received from the MAP MO short message (MAP-MO-FORWARD-SHORT-MESSAGE) received from the originating MSC 32, and the MAP routing information request message based on the corresponding destination subscriber number. (MAP-SEND-ROUTING-INFO-FOR-SM) is generated and transmitted to the HLR 40 managing the called subscriber (hereinafter, denoted by 21 'to distinguish it from the calling subscriber 21).

Accordingly, the HLR 40 receives a MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) from the SMC 63 by an IIF 41 therein and is stored in an internal database. After querying the MSC information, a response message (MAP-SEND-ROUTING-INFO-FOR-SM ack) for the MAP routing information request message is generated and the called subscriber 21 'is located in the corresponding response message. The address of the destination MSC 32 'is included and returned to the SMC 63.

At this time, the HLR 40 indicates that an error occurs while processing the MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) received from the SMC 63, or the short-term reception with the incoming MSISDN. Check whether the MSISDN to be notified is different or if the corresponding memory is not available by the memory pool of the called party 21 '. In this case, the current terminal state information of the called party 21' ( Not Reachable or Memory Capacity Exceed) and MSISDN Notification Information (MSISDN-Alert) are sent together in the MAP Information Service Center message (MAP-INFORM-SERVICE-CENTER) and sent to the SMC 63, indicating that an error has occurred. .

In particular, when an error occurs while processing the MAP routing information request message (MAP-SEND-ROUTING-INFO-FOR-SM) received from the SMC 63, the HLR 40 in the database, the SMC address and the terminal state Store and manage your information.

Accordingly, the SMC (63) checks the destination MSC address from the MAP routing information response message (MAP-SEND-ROUTING-INFO-FOR-SM ack) received from the HLR (40), and the originating MSC (32) The received short message is included in the MAP MT short message (MAP-MT-FORWARD-SHORT-MESSAGE) and transmitted to the RGW 50 using the identified destination MSC address.

Then, the RGW 50 receives the MAP MT short message (MAP-MT-FORWARD-SHORT-MESSAGE) from the SMC 63 and the corresponding MAP MT short protocol by the internal IIF 51 (for example, 3GPP). / GSM protocol) is converted to the SMDPP message protocol (e.g., IS-41.C protocol) used in the first core network 30, i.e., as shown in Figure 9, the SMC 63 The MAP MT short (MAP-MT-FORWARD-SHORT-MESSAGE) received from the MAP MT to map the parameters of the SMDPP message used in the first core network 30 by mapping the SMDPP message to the first core network (30) It transmits to the destination MSC 32 '.

Accordingly, the called MSC 32 'receives the SMDPP message from the RGW 50, checks the called subscriber number roaming in the first core network 30, and SMD the received short message from the RGW 50. The message is transmitted to the called party 21 'corresponding to the called party number via the BSC 23 and the BTS 22 using the -REQ message.

Accordingly, the called subscriber 21 'receives the SMD-REQ message from the called MSC 32', generates a response message (SMD-Ack), and returns it to the called MSC 32 '. The destination MSC 32 'generates a response message (smdpp [ACK]) for the SMDPP message and transmits it to the RGW 50.

Then, the RGW 50 receives the SMDPP response message (smdpp [ACK]) from the destination MSC 32 'and converts the protocol as described above by the internal IIF 51 to convert the MAP MT short response message (MAP). MT-FORWARD-SHORT-MESSAGE ack) is transmitted to the SMC 63.

As a fourth example, a short service method for a case where a short message is re-sent to another generation of mobile subscribers roaming to an arbitrary mobile communication network due to a short message transmission failure as described above will be described with reference to the flowchart of FIG. 10. Is as follows.

First, another generation of incoming subscribers (e.g., third generation mobile subscribers 21 subscribed to the second core network 60) to roam to any mobile communication network (e.g., the first core network 30). If the short message to be transmitted to the recipient is not stored in the SMC 63 and the short message cannot be transmitted to the called subscriber 21 due to a communication failure, the called subscriber 21 may perform the location registration. The MSC 32 in the network 30 is accessed, and when the MSC 32 is accessed, the called subscriber 21 attempts to register the location with the present status (Present, Present & Memory Available, Memory Available). do.

Accordingly, the MSC 32 confirms the location registration attempt, that is, System Access, from the called party 21, and the current state of the called party 21 is available for memory (Present & Memory Available, Memory Available). Check if it is the case.

This is because when the called subscriber 21 performs the short transmission request unconditionally when the memory is not available in the memory pool state, there is a problem of increasing unnecessary signaling of the network and increasing network load. In order not to perform unconditionally, the short transmission request is made only when the memory of the called party 21 is available.

That is, only when the memory of the called subscriber 21 is available, the MSC 32 includes the SMS message waiting indicator parameter in the location registration message and transmits it to the HLR 40. Accordingly, the HLR 40 performs the location registration procedure of the called party 21.

At this time, when registering the location, the state of the called party 21 is subdivided into four states as shown in Table 1 below, and the location is registered so that the memory of the called party 21 is no longer short. Do not perform the transfer request.

Terminal status when registering location Power Call processing Short service Present ON possible Impossible Present & Memory Available ON possible possible Memory Available ON possible possible Power-off OFF Impossible Impossible

After performing the location registration process, the HLR 40 searches the incoming subscriber information database to determine whether the SMC address is stored, and if the SMC address is stored, the MAP notification service center message ( By generating the MAP-ALERT-SERVICE-CENTER and transmitting to the SMC 63 corresponding to the identified address, the short message is requested.

Accordingly, the SMC 63 generates a response message (MAP-ALERT-SERVICE-CENTER Ack) to the MAP notification service center message (MAP-ALERT-SERVICE-CENTER) received from the HLR 40 to generate the HLR. The SLR 40 deletes the SMC address from the called subscriber information database.

Subsequently, the operation follows the same procedure as the operation description of FIG. 8.

As described above, when the mobile subscriber roams to the mobile communication network of different generations, by converting the message protocol between the mobile communication networks of different generations and interworking with each other, the short-term service can be supported in the heterogeneous mobile communication network without any problem. have.

1 is a diagram illustrating a configuration for short service in a general mobile communication network.

2 is a diagram illustrating a configuration for short service in a heterogeneous mobile communication network according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a short service method in a heterogeneous mobile communication network according to an exemplary embodiment of the present invention.

4 and 5 are detailed flowcharts illustrating a short service method from another generation of originating subscribers loaded in any mobile communication network to a destination subscriber registered in another generation of mobile communication networks.

FIG. 6 is a diagram illustrating parameter mapping between a Short Message Delivery Point (SMDPP) message and a Mobile Application Part (MAP) Mobile Origination (MO) sentence in FIG. 4; FIG.

7 and 8 are flowcharts showing in detail the method of a short service from an originating subscriber which is registered in an arbitrary mobile communication network to an incoming subscriber of another generation roaming in another generation of mobile communication network in FIG.

FIG. 9 is a diagram illustrating parameter mapping between MAP Mobile Termination (MT) short messages and SMDPP messages in FIG. 8; FIG.

FIG. 10 is a detailed flowchart of a short service method to another generation of originating subscribers roaming to an arbitrary mobile communication network after the short transmission fails in FIG. 3; FIG.

Explanation of symbols on the main parts of the drawings

21, 71: Mobile Station 22: BTS (Base Transceiver Station)

23: Base Station Controller

30, 60: Core Network

31, 61: VLR (Visitor Location Register)

32, 62: MSC (Mobile Switching Center)

40: HLR (Home Location Register)

41, 51: Inter-working Inter-operability Function

50: RGW (Roaming Gate Way) 63: SMC (Short Message Center)

72: Node-B 73: RNC (Radio Network Controller)

Claims (9)

Receive a short message from a calling subscriber in a heterogeneous mobile communication network, check whether it is a short message to be sent to a called subscriber belonging to another generation of mobile communication network, convert the short message into a protocol used in another generation of mobile communication network, and convert the corresponding short message to the corresponding protocol. In a short service method in a heterogeneous mobile communication network transmitted to a called subscriber, Mapping parameters in Short Message Delivery Point (SMDPPP) messages to parameters of Mobile Application Part (MAP) Mobile Origination (MO) short messages using the Roaming Gate Way (RGW), or SMDPP messages to parameters in MAP Mobile Termination (MT) short messages. Performing a short message service (SMS) interworking operation on a heterogeneous communication network by mapping to a parameter of a; If the short transmission fails, after performing the location registration procedure of the called party, the database is searched to check the availability status of the called party memory and the Short Message Center (SMC) address, and to the SMC corresponding to the corresponding SMC address. And transmitting the short message to the called subscriber by requesting the short message transmission. delete delete The method of claim 1, The database may include information on activation of a mobile subscriber, information on a memory capacity of the mobile subscriber, subscriber number information indicating that a short message has been received, and SMC address information on which a short transmission has failed. Way. The method of claim 1, Retransmitting the short message to the called subscriber may include, when the short message to be sent to the called subscriber cannot be transmitted due to a communication failure, confirming a location registration attempt from the called subscriber at the called mobile switching center (MSC) and presenting the current state of the called subscriber. Confirming; Transmitting an SMS message waiting indication parameter to a home location register (HLR) by including an SMS message waiting indication parameter in a location registration message when the memory of the called subscriber is available; Checking the presence or absence of an SMC address stored in a database after performing a location registration procedure in the HLR and requesting short retransmission to the SMC corresponding to the address; Generating, by the SMC, a MAP routing information request message for obtaining the address of the destination MSC and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR, and including the address of the destination MSC in the response message and returning it to the SMC; Identifying, at the SMC, a destination MSC address from the response message of the HLR, including the short message in the MAP MT short message, and retransmitting it to the RGW; Receiving the MAP MT short message from the SMC in the RGW and converting the MAP MT short protocol into an SMDPP message protocol used in another generation of mobile communication networks; Receiving the SMDPP message from the RGW at the terminating MSC and checking a terminating subscriber number to retransmit the short message to the terminating subscriber; The method of claim 1, In the short message transmission process, when a calling party of another generation roaming in an arbitrary mobile communication network sends a short message to a called party registered in another generation of mobile communication network, the short message is transmitted to the SMDPP message by the sending MSC. Steps; Receiving the SMDPP message at the RGW and converting the SMDPP message protocol into a MAP MO short protocol used in another generation of mobile communication networks; Receiving a MAP MO short message from the RGW in an SMC in another generation of mobile communication network, generating a response message for the corresponding MAP MO short message, and transmitting the MAP MO short message to the calling subscriber through the RGW; Generating, by the SMC, a MAP routing information request message for obtaining an address of the destination MSC and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR and including the destination MSC address in a response message and returning the message to the SMC; Confirming, by the SMC, the destination MSC address from the response message of the HLR, including the short message in the MAP MT short message, and sending the short message to the destination MSC; The destination MSC checks the International Mobile Subscriber Identity (IMSI) or Local Mobile Station Identity (LMSI) from the MAP MT short message, and includes the IMSI or LMSI in the MAP destination information request message and transmits the message to the destination VLR (Visitor Location Register). Steps; Inquiring of called subscriber information in a database by the called VLR and including a called mobile station international ISDN number in a response message and returning it to the called MSC; And confirming the destination MSISDN from the response message of the destination VLR in the destination MSC and transmitting the short message to the destination subscriber. The method of claim 6, The short transmission process may be performed when the MAP routing information request message is processed, when the incoming MSISDN and the MSISDN to notify that the short incoming call are different from each other, or the memory pool of the called subscriber, the SMC address in the database. And storing and managing terminal status information, and including the current terminal status information of the called subscriber and the MSISDN notification information in a MAP information service center message to notify the SMC. Short service method. The method of claim 1, The short message transmission process checks the SMC address from the short message at the calling MSC when the calling subscriber located in an arbitrary mobile communication network sends a short message to a called subscriber of another household roaming in another mobile communication network. Transmitting the SMC address in a MAP origination information request message; Receiving, by the VLR, the MAP origination information request message and inquiring outgoing subscriber information in the database, including the originating MSISDN in the response message and returning it to the originating MSC; Sending, by the sending MSC, the MAP MO short message to the SMC together with the short message, and generating a response message to notify the calling subscriber that the short message has been sent; Generating, by the SMC, a MAP routing information request message for obtaining an address of a destination MSC in another generation of mobile communication networks and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR, and including the address of the destination MSC in the response message and returning it to the SMC; Confirming, by the SMC, the destination MSC address from the response message of the HLR, including the short message in the MAP MT short message and sending the short message to the RGW; Receiving the MAP MT short message from the SMC in the RGW and converting the MAP MT short protocol into an SMDPP message protocol used in another generation of mobile communication networks; And receiving the SMDPP message from the RGW at the destination MSC, identifying a called party number and transmitting the short message to the called party. The method of claim 1, The short message transmission process may include transmitting a short message in an SMDPP message in an outgoing MSC when the outgoing subscriber of another generation roaming in an arbitrary mobile communication network sends a short message to another incoming subscriber of another generation; Receiving the SMDPP message at the RGW and converting the SMDPP message protocol into a MAP MO short protocol used in another generation of mobile communication networks; Receiving a MAP MO short message from the RGW in an SMC in another generation of mobile communication network, generating a response message for the corresponding MAP MO short message, and transmitting the MAP MO short message to the calling subscriber through the RGW; Generating, by the SMC, a MAP routing information request message for obtaining an address of the destination MSC and transmitting the same to the HLR; Inquiring of the destination MSC information in the database by the HLR, and including the address of the destination MSC in the response message and returning it to the SMC; Confirming, by the SMC, the destination MSC address from the response message of the HLR, including the short message in the MAP MT short message and sending the short message to the RGW; Receiving the MAP MT short message from the SMC in the RGW and converting the MAP MT short protocol into an SMDPP message protocol used in another generation of mobile communication networks; And receiving the SMDPP message from the RGW at the destination MSC, identifying a called party number and transmitting the short message to the called party.