JP5243948B2 - Short message control device and short message control method - Google Patents

Description

  The present invention relates to a short message control device and a short message method for controlling a short message transmitted and received in a mobile communication network.

SMS (Short Message Service) is a service that can transmit and receive messages between mobile communication terminals in a mobile communication network. SMS normally has a limit on the amount of short message data that can be transmitted and received. A technique called concatenated SMS has been proposed as a method for transmitting and receiving a message having a data amount exceeding such a limit (for example, 70 characters or more (UCS-2: Universal Character Set coded in 2 octets)) (for example, Non-Patent Document 1). reference). In linked SMS, a message is divided into a plurality of short messages by a transmitting mobile communication terminal and transmitted, and a plurality of short messages received by a receiving mobile communication terminal are connected to perform processing such as display.
3GPP TS23.040 Technical realization of Short Message Service (SMS)

  However, linked SMS requires that both mobile communication terminals on the sending and receiving sides have the linked SMS function. When a short message divided by the function of linked SMS is transmitted to a mobile communication terminal that does not have the function of linked SMS, the mobile communication terminal cannot link the divided short message and displays Such an appropriate process cannot be performed. Even in the above case, since a short message is received at the mobile communication terminal on the receiving side, the user cannot see the message, but the user is not charged (for example, mobile communication on the transmitting side). There is a problem that billing to the user of the terminal occurs.

  The present invention has been made to solve the above problems, and there is a terminal that does not have a function of processing a concatenated short message in which a plurality of short messages are concatenated into one message. Even if it is a case, it aims at providing the short message control apparatus and the short message control method which enable the short message transmitted by the function of the connection short message to be processed appropriately.

In order to achieve the above object, a short message control apparatus according to the present invention is a short message control apparatus for controlling a short message transmitted and received in a mobile communication network, from a transmitting terminal to a receiving terminal. Whether the short message received by the receiving means and the short message received by the receiving means form a concatenated short message in which a plurality of short messages are concatenated into one message Connected short message determining means, a function determining means for determining whether or not a terminal on the receiving side has a function of processing the connected short message, and a transmitting side that has transmitted the short message received by the receiving means Source determination method for determining whether the type of terminal is a mobile communication terminal If, it is determined that the terminal of the reception side by the function judgment means does not have a function of processing a connecting short message, and if the type of the transmitting terminal by the source determination means it is determined to be a mobile communication terminal A conversion means for converting a short message determined by the connected short message determination means to be in a format constituting a connected short message into a format that can be processed by a terminal that does not have a function of processing the connected short message; Transmitting means for transmitting the short message whose format has been converted to the terminal on the receiving side.

  In the short message control device according to the present invention, it is determined whether or not the received short message is in the form of a concatenated short message, and the receiving terminal has a function of processing the concatenated short message. It is determined whether it has. As a result of the determination, if it is determined that the short message is in the form of a concatenated short message and the terminal on the receiving side does not have a function for processing the concatenated short message, the short message indicates a concatenated short message. It is converted into a format that can be processed by a terminal that does not have a function to process, and is transmitted to the terminal on the receiving side. Therefore, according to the short message control device according to the present invention, when the receiving terminal does not have the function of processing the concatenated short message, it is possible to receive a short message in a format that can be processed by the terminal. . That is, according to the short message control device according to the present invention, even if there is a terminal that does not have a function of processing the concatenated short message, the short message transmitted by the function of the concatenated short message is not received. Properly handled.

Depending transmit side terminal, by performing the format changes of short messages constituting the coupling short messages as in the present invention may not be appropriate. In such a case, according to this configuration, an appropriate linked short message can be processed.

  The concatenated short message determination means determines whether or not the short message received by the receiving means is a control short message, and when it is determined that the short message is a control short message, the short message is a concatenated short message. It is desirable to determine whether or not it is a format that constitutes. Usually, the concatenated short message is one of the control short messages. Therefore, according to this configuration, only when it is determined that the short message is a control short message, it is only necessary to determine whether or not it is a linked short message, and the present invention can be efficiently implemented. it can.

  It is desirable that the conversion means include information indicating that the short message constitutes a concatenated short message in the short message after the format conversion. According to this configuration, even when the short message is received after the format is converted, the receiving terminal can recognize that the short message constitutes a linked short message. .

  Further, the conversion means, as information indicating that the short message constitutes a concatenated short message, includes the total number of short messages constituting the concatenated short message and the number indicating how many of those short messages are. It is desirable to include information indicating at least one of the short messages after the format conversion. According to this configuration, the user can appropriately recognize the number and order of the short messages.

  By the way, the present invention can be described as an invention of a short message control apparatus as described above, and can also be described as an invention of a short message control method as follows. This is substantially the same invention only in different categories, and has the same operations and effects.

That is, the short message control method according to the present invention is a short message control method for controlling a short message transmitted and received in a mobile communication network, and is a short message transmitted from a transmitting terminal to a receiving terminal. A reception step for receiving a message, and a short message received in the reception step is a short message determination that determines whether or not the short message received in the reception step is of a format that forms a single short message by concatenating a plurality of short messages. And a function determination step for determining whether or not the receiving terminal has a function of processing the connected short message, and the type of the transmitting terminal that has transmitted the short message received in the receiving step is mobile communication A source determination step for determining whether or not the terminal is a terminal And flop, function determination terminal on the receiving side in step is determined to have no function of processing the connecting short message, and if the type of the terminal on the transmission side in the transmission source determination step determines that the mobile communication terminal A conversion step of converting the short message determined to be in the format constituting the concatenated short message in the concatenated short message determination step into a format that can be processed by a terminal that does not have a function of processing the concatenated short message; And a transmitting step of transmitting the short message whose format is converted in the step to the receiving terminal.

  According to the present invention, when the receiving terminal does not have a function of processing the concatenated short message, it is possible to receive a short message in a format that can be processed by the terminal. Even if there is a terminal that does not have the function to process, the short message transmitted by the function of the linked short message is appropriately processed.

  Hereinafter, preferred embodiments of a short message control device and a short message control method according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Note that the data names, signal names, and specific contents thereof in this embodiment conform to 3GPP (3rd Generation Partnership Project).

  FIG. 1 shows an SGSN / MSC (SGSN Serving GPRS Support Node / Mobile Switching Center) 10 which is a short message control apparatus according to the present embodiment. The SGSN / MSC 10 is a component of the mobile communication network N. The mobile communication network N is a connection target of the mobile communication terminal, and provides a mobile communication function to the mobile communication terminal. The mobile communication network N includes the SGSN / MSC 10, the HLR (Home Location Register) 20, the SMS-GSMC (SMS-Gateway Mobile Switching Center) 30, and the SM-SC (Short Message Service Center) 40. It consists of In addition, the mobile communication network N includes components that constitute a normal mobile communication network such as a base station and a radio control device, in addition to the above-described components.

  The mobile communication network N provides an SMS function to the mobile communication terminals. In the mobile communication network N, SMS short messages including character information and the like are transmitted and received between the mobile communication terminals. Types of short messages include general SMS used for exchange of character information (character messages) between users, and control SMS (control short message) for controlling the function of the mobile communication terminal. A plurality of short messages transmitted and received by the function of the concatenated SMS corresponds to the control SMS in order to control the function of concatenating the short messages in the mobile communication terminal on the receiving side. Some short messages are not transmitted from a mobile communication terminal, but are transmitted from a node of the mobile communication network N or the like.

  Here, FIG. 2 and FIG. 3 show the data structure of the short message. FIG. 2 shows the overall configuration of the short message, and FIG. 3 shows the configuration of the user data portion (portion corresponding to TP-UD in FIG. 2) of the short message. 2 and 3, the rightmost column indicates the data size (in octets), and the uppermost row indicates the data storage position. In FIG. 3, each information element (IE: Information-Element) is subscripted like a, b, c.

  Also, FIG. 4 shows individual information elements (IEI (Information-Element-Identifier, IEIa, IEIb, etc. in FIG. 3), IEDL (Length of Information-Element, IEDLa, IEDLb, etc. in FIG. 3)) of the user data portion of the short message. , IED (Information-Element Data, IEDa, IEDb, etc. in FIG. 3)). In FIG. 4, the rightmost column indicates the data size (in octets), the uppermost row indicates the data storage position, and the leftmost column indicates the field name. If the short message constitutes a concatenated SMS, as shown in FIG. 4, the IED (any one) contains information indicating the concatenated short message reference number, the maximum short message number, and the sequence number. Yes.

  The concatenated short message reference number is information (reference number) that identifies a message that is divided into a plurality of short messages by the function of the concatenated SMS. This serial number has the same value for all short messages constituting a message. The maximum short message number is a value indicating the total number of short messages in which the message is divided by the function of the concatenated SMS, and a value from 0 to 255 is set. The maximum short message number takes a value of 1 or more, and is the same value for all short messages constituting a certain message. The sequence number is a sequence number of a short message that constitutes a message by the function of the concatenated SMS, and a value from 0 to 255 is set. The sequence number starts from 1 and increases by 1 each time a series of short messages constituting the message is transmitted.

  A plurality of SGSN / MSCs 10 are normally provided in the mobile communication network N, and serve as an exchange for packet / circuit switching communication in the mobile communication network N. The SGSN / MSC 10 manages mobile communication terminals according to the communication area (the mobile communication terminal is in the area). The SGSN / MSC 10 inputs a short message transmitted to the mobile communication terminal managed by the SGSN / MSC 10 from the SMS-GMSC 30 and transmits (distributes) it to the mobile communication terminal. The SGSN / MSC 10 has a function according to the present invention for controlling a short message, as will be described later. The function according to the present invention of the SGSN / MSC 10 is a function for managing a mobile communication terminal that receives a short message as will be described later. Although the SGSN / MSC 10 is described as a single device in the present embodiment, it may be realized as a plurality of devices (computer systems) (the same applies to other nodes constituting the mobile communication network N). .

  The HLR 20 is a device that receives a location registration request from a mobile communication terminal and manages the location information of the mobile communication terminal. The location information includes information indicating to which SGSN / MSC 10 the mobile communication terminal is managed. The HLR 20 is connected to the SGSN / MSC 10 and the SMS-GMSC 30 and the like, and information managed by the HLR 20 is referred to from those devices as necessary. The SMS-GMSC 30 is a device that performs short message distribution processing. The SMS-GMSC 30 is connected to each SGSN / MSC 10. When the short message delivery request is input from the SM-SC 40, the SMS-GMSC 30 refers to the HLR 20 to identify the SGSN / MSC 10 that manages the mobile communication terminal that receives the short message, and identifies the identified SGSN / MSC 10 Send the short message to.

  The SM-SC 40 is a device that accepts a short message from the source of the short message (such as a mobile communication terminal that transmits the short message). That is, the SMS transmission process is performed between the SM-SC 40 and the transmission source of the short message. The SM-SC 40 is connected to the SMS-GMSC 30 and transmits the received short message to the SMS-GMSC 30 as a short message transfer request. In addition, the function of each apparatus 20-40 mentioned above is a function similar to the conventional function.

  The mobile communication terminal is a device possessed by the user and having a function of connecting to the mobile communication network N by mobile communication. The mobile communication terminal has a function of transmitting and receiving short messages by SMS. That is, the mobile communication terminal can transmit a short message to the mobile communication network N, or can receive a short message (transmitted to the own terminal) from the mobile communication network N. Some mobile communication terminals have the function of linked SMS. When transmitting a short message, a mobile communication terminal having the function of concatenated SMS divides the message into a plurality of short messages and transmits the divided messages. In addition, when the mobile communication terminal having the function of the connected SMS receives the divided short message, the mobile communication terminal indicates that the short message is a divided short message related to the connected SMS (the short message It recognizes (refers to a header etc.), connects a plurality of those short messages, and performs processing such as display.

  On the other hand, the mobile communication terminal that does not have the function of the connected SMS can receive the divided short message, but recognizes that the short message is the divided short message related to the connected SMS. Cannot be handled properly. That is, the character information related to the message before the division cannot be properly displayed. In the present embodiment, hereinafter, the mobile communication terminal on the short message transmission (transmission) side is referred to as the transmission-side mobile communication terminal 50, and the mobile communication terminal on the short message reception (incoming) side is referred to as the reception-side mobile communication terminal 60. Do. The transmission side mobile communication terminal 50 and the reception side mobile communication terminal 60 are the same as conventional mobile communication terminals. In the following description, it is assumed that the receiving-side mobile communication terminal 60 is managed by the SGSN / MSC 10. The transmission-side mobile communication terminal 50 and the reception-side mobile communication terminal 60 described above may include those that have the function of connected SMS and those that do not.

  Subsequently, functions of the SGSN / MSC 10 according to the present embodiment will be described. As shown in FIG. 1, the SGSN / MSC 10 includes a reception unit 11, a connected SMS determination unit 12, a function determination unit 13, a transmission source determination unit 14, a conversion unit 15, and a transmission unit 16. Has been. Note that the SGSN / MSC 10 has a function that a normal SGSN / MSC has in addition to the above-described components.

  The receiving unit 11 is a receiving unit that receives a short message transmitted from the transmitting mobile communication terminal 50 or the like to the receiving mobile communication terminal 60. Specifically, the receiving unit 11 receives the short message (request for transmission to the receiving-side mobile communication terminal 60) transmitted from the SMS-GMSC 30 to the SGSN / MSC 10. The reception unit 11 outputs the received short message to the connected SMS determination unit 12, the function determination unit 13, the transmission source determination unit 14, and the conversion unit 15, respectively.

  The concatenated SMS determination unit 12 is a concatenated short message determination unit that determines whether the short message input from the reception unit 11 is in the form of a short message divided by the function of the concatenated SMS. Here, the short message (concatenated short message) divided by the function of the concatenated SMS is a short message in which a plurality of short messages are concatenated into one message as described above.

  Specifically, the connected SMS determination unit 12 first determines whether or not the short message input from the reception unit 11 is a control SMS. Specifically, the determination is performed with reference to the information indicating the type of the short message included in the SMS header of the short message input from the receiving unit 11. The connected SMS determination unit 12 performs the above determination with reference to TP-UDHI (TP-User-Data-Header-Indicator) (see FIG. 2) of the SMS header. When TP-UDHI contains only a short message (its data body, corresponding to the bottom row in FIG. 3) in TP-UD (TP-User-Data), which is a field for storing user data of the short message, “ “0” is stored, and “1” is stored when the header is stored in addition to the short message (its data body) at the head of the TP-UD.

  The connected SMS determination unit 12 determines that the short message is control SMS if TP-UDHI = 1, and determines that the short message is general SMS if TP-UDHI = 0. When the connected SMS determination unit 12 determines that the short message is general SMS, the SGSN / MSC 10 performs transmission processing of an existing (conventional) short message. When it is determined that the short message is a control SMS, the linked SMS determination unit 12 subsequently determines whether or not the short message is in a format related to the linked SMS.

  Specifically, it is included in the TP-UD header (data from UDHL (Length of User Data Header) to IEDz (Information-Element “z” Data) in FIG. 3) of the short message input from the receiving unit 11. The determination is made with reference to the information indicating the type of the short message. The IEI (Information-Element-Identifier in FIG. 3, IEIa, IEIb, etc.) of the TP-UD header is “00000000” (8-bit serial number) or “00001000” (16-bit serial number) when short messages are connected. ) Is set. The concatenated SMS determination unit 12 determines concatenated SMS if “00000000” or “00001000” is included in any of the IEIs of the referenced TP-UD header, and “00000000” or “ If “00001000” is not included, it is determined that the SMS is not connected SMS. When the connected SMS determination unit 12 determines that the short message is not related to the connected SMS, the SGSN / MSC 10 performs an existing (conventional) short message transmission process. When the connected SMS determination unit 12 determines that the short message is related to the connected SMS, the connection SMS determination unit 12 notifies the conversion unit 15 to that effect.

  The function determining unit 13 determines whether or not the receiving-side mobile communication terminal 60 related to the short message input from the receiving unit 11 has a function of linked SMS (whether or not it is a linked SMS compatible terminal). It is a determination means. Specifically, the function determining unit 13 first specifies the receiving-side mobile communication terminal 60 based on the short message input from the receiving unit 11. Subsequently, the function determination unit 13 performs the above determination with reference to the IMEISV (International Mobile Station Equipment Identity and Software Version number) of the subscriber profile of the receiving-side mobile communication terminal 60 held by the own device 10.

  The IMEISV of the subscriber profile is transmitted from the receiving mobile communication terminal 60 to the SGSN / MSC 10 and held when the receiving mobile communication terminal 60 performs location registration. IMEISV indicates the model of the receiving-side mobile communication terminal 60 and the version of the platform (software). For example, the function determination unit 13 stores information on IMEISV having the function of the linked SMS in advance, and performs determination based on the information. When the function determining unit 13 determines that the receiving-side mobile communication terminal 60 is a connected SMS compatible terminal, the SGSN / MSC 10 performs an existing (conventional) short message transmission process. When the function determination unit 13 determines that the receiving-side mobile communication terminal 60 is a terminal that does not support linked SMS, the function determination unit 13 notifies the conversion unit 15 to that effect.

  The transmission source determination unit 14 is a transmission source determination unit that determines the type of the transmission source of the short message input from the reception unit 11. Specifically, the transmission source determination unit 14 determines whether or not the transmission source of the short message is a mobile communication terminal (not a node or the like of the mobile communication network N). The transmission source determination unit 14 performs determination with reference to TP-OA (TP-Originating-Address) that is information indicating the transmission source of the short message included in the SMS header of the short message input from the reception unit 11. If the source is a mobile communication terminal, Numbering-Plan-Ind of TP-OA is set to “E.164”, and if the source is other than a mobile communication terminal, Numbering-Plan-Ind is “E.164”. Other than "". When the transmission source determination unit 14 determines that the transmission source of the short message is other than the mobile communication terminal, the SGSN / MSC 10 performs an existing (conventional) short message transmission process. If the transmission source determination unit 14 determines that the transmission source of the short message is a mobile communication terminal, the transmission source determination unit 14 notifies the conversion unit 15 to that effect.

  The conversion unit 15 receives the short message input from the reception unit 11 based on the notifications from the connected SMS determination unit 12, the function determination unit 13, and the transmission source determination unit 14, and has no connection SMS function. This is a conversion means for converting into a format that can be processed by the mobile communication terminal 60, that is, a general SMS format. The conversion unit 15 is notified from the connected SMS determination unit 12 that the short message is related to the connected SMS, and the function determination unit 13 is notified that the receiving-side mobile communication terminal 60 is a terminal that does not support connected SMS. When the transmission source determination unit 14 notifies that the transmission source of the short message is a mobile communication terminal, the above conversion is performed.

  The conversion unit 15 performs the conversion by deleting the TP-UD header of the short message. Specifically, first, the conversion unit 15 rewrites TP-UDHI in the SMS header of the short message from “1” to “0”. Subsequently, the TP-UD header is deleted from the short message. Subsequently, in accordance with the above conversion, the contents of TP-UDL (TP-User-Data-Length) in the SMS header are rewritten. The TP-UDL field definition is constant regardless of the presence of a header, and the total length (size) of the TP-UD field including the header is set in the TP-UDL. In the TP-UD field, user data of up to 140 octets can be stored.

  The conversion unit 15 rewrites the TP-UDL to the value of the length of the short message body according to the value of TP-DCS (TP-Data-Coding-Scheme) included in the SMS header of the short message. The TP-DCS field indicates the codec type of 8-bit data (TP-DCS = XXXX01XX), USC2 (16 bits) (TP-DCS = XXXX10XX), or GSM 7-bit default alphabet (TP-DCS = XXXX00XX). Contains information. Specifically, for example, when the codec type is 8-bit data or USC2, the conversion unit 15 rewrites TP-UDL to a value obtained by subtracting the TP-UD header size (TP-UDHL + 1 octet). That is, the short message size in TP-UD set in TP-UDL is 140- (TP-UDHL + 1) octets. The conversion unit 15 inputs the converted short message to the transmission unit 16.

  Further, the conversion unit 15 may include information indicating that the short message constitutes the concatenated SMS when the concatenated SMS short message is converted into the general SMS short message as described above. . This information is output on the receiving side mobile communication terminal 60 such as a display, so that the user can know that the received short message was originally based on the linked SMS. The information indicating that the short message constitutes the concatenated SMS is, for example, at least one of the total number of the short messages composing the concatenated SMS and the number indicating the number of the short messages. Etc. This information can be obtained from the short message (before conversion).

  Specifically, the conversion unit 15 uses the “maximum short message number” and the “sequence number” (see FIG. 4) in the TP-UDH of the short message (before conversion) to form the short message constituting the linked SMS. And the number that the short message indicates some of them. The information included in the short message after conversion is, for example, a serial number (001, 002, 003...) That is a three-byte numeric character by converting a binary “sequence number” into a decimal number. However, for the last short message among the short messages constituting the concatenated SMS, the reference number to be inserted is three-byte alphabetic characters “END”.

  For example, in the case of a concatenated SMS divided into three (the maximum short message number is “00000011”), it is as follows. If the sequence number is “00000001” (the sequence number is not the maximum short message number, that is, not the last short message), “001” is inserted. When the sequence number is “00000010” (the sequence number is not the maximum short message number, that is, not the last short message), “002” is inserted. If the sequence number is “00000011” (the sequence number is the same as the maximum short message number, that is, the last short message), “END” is inserted. This reference number is inserted at the end of the short message in the TP-UD, for example. In that case, the length of the TP-UD after inserting the reference number is set in the TP-UDL.

With such a configuration, even if the short message is received after the format is converted in the receiving-side mobile communication terminal 60, it is appropriate that the short message constitutes a linked short message. Can be recognized. If the sequence number or the like is inserted as described above, the user can appropriately recognize the number and order of the short messages.

  The transmission unit 16 is a transmission unit that transmits the short message, whose format has been converted by the conversion unit 15, to the receiving-side mobile communication terminal 60 through the mobile communication network N. The above is the functional configuration of the SGSN / MSC 10.

  As shown in FIG. 5, the SGSN / MSC 10 includes a CPU (Central Processing Unit) 101, a RAM (Random Access Memory) 102 and a ROM (Read Only Memory) 103, which are main storage devices, a communication module 104, and auxiliary storage such as a hard disk. A computer including hardware such as the device 105 is provided. When these components operate, the above-described functions of the SGSN / MSC 10 are exhibited.

  Subsequently, processing (short message control method) executed by the SGSN / MSC 10 according to the present embodiment will be described with reference to the sequence diagram of FIG.

  First, a short message addressed to the reception-side mobile communication terminal 60 is transmitted from the transmission-side mobile communication terminal 50, and SMS transmission processing is performed between the transmission-side mobile communication terminal 50 and the SM-SC 40 (S01). With this process, the short message to be transmitted is accepted and accumulated in the SM-SC 40. When the short message is related to the connected SMS, at this point, the short message is divided into a plurality of short messages by the transmitting mobile communication terminal 50 having the function of the connected SMS.

  Subsequently, a short message transfer request related to the short message is transmitted from the SM-SC 40 to the SMS-GMSC 30 (S02). When the short message transfer request is input to the SMS-GMSC 30, the SEND ROUTING INFO FOR SM, which is a signal for confirming the route for transmitting the short message, is transmitted from the SMS-GMSC 30 to the HLR 20 (S03). In response to the transmission, a response SEND ROUTING INFO FOR SM.ack is transmitted from the HLR 20 to the SMS-GMSC 30 (S04). In SMS-GMSC30, SGSN / MSC10 is specified based on the information, and short message transmission (MT forward SM) is performed. In the SGSN / MSC 10, the short message is received by the receiving unit 11 (S05, receiving step). The received short message is input from the reception unit 11 to the connected SMS determination unit 12, the function determination unit 13, the transmission source determination unit 14, and the conversion unit 15.

  Subsequently, the SGSN / MSC 10 identifies the receiving-side mobile communication terminal 60 as a transmission destination from the received short message, and performs paging, authentication, and concealment with the receiving-side mobile communication terminal 60 (similar to the prior art). Processing is performed (S06). Subsequently, the linked SMS determination unit 12 determines whether or not the short message is a control SMS (S07, linked short message determination step). Here, when it is determined that the short message is general SMS, the SGSN / MSC 10 performs transmission processing of an existing (conventional) short message (S08).

  On the other hand, if it is determined that the short message is a control SMS, then the transmission source determination unit 14 determines whether the source of the short message is a mobile communication terminal (not a node of the mobile communication network N). It is determined whether or not (S09, transmission source determination step). Here, when it is determined that the source of the short message is other than the mobile communication terminal, the SGSN / MSC 10 performs an existing (conventional) short message transmission process (S10).

  On the other hand, when it is determined that the source of the short message is a mobile communication terminal, the transmission source determination unit 14 notifies the conversion unit 15 to that effect. Subsequently, the connected SMS determination unit 12 determines whether or not the short message has a format related to the connected SMS (S11, connected short message determination step). Here, when it is determined that the short message is not in the format related to the concatenated SMS, the SGSN / MSC 10 performs an existing (conventional) short message transmission process (S12).

  On the other hand, when it is determined that the short message is in the format related to the linked SMS, the conversion SMS determination unit 12 notifies the conversion unit 15 to that effect. Subsequently, the function determination unit 13 determines whether or not the receiving-side mobile communication terminal 60 related to the short message is a connected SMS compatible terminal (S13, function determination step). Here, when it is determined that the receiving-side mobile communication terminal 60 is a connected SMS compatible terminal, the SGSN / MSC 10 performs an existing (conventional) short message transmission process (S14). That is, the short message is transmitted to the receiving side mobile communication terminal 60 with the TP-UD header as it is in the control SMS.

  On the other hand, when it is determined that the receiving-side mobile communication terminal 60 is a terminal that does not support linked SMS, the conversion unit 15 has received notifications from the linked SMS determination unit 12, the function determination unit 13, and the transmission source determination unit 14, respectively. The conversion unit 15 converts the short message input from the reception unit 11 into the general SMS format (S15, conversion step). The converted short message is input to the transmission unit 16.

  Subsequently, incoming processing of a short message is performed between the transmission unit 16 and the receiving-side mobile communication terminal 60. That is, the converted short message is transmitted to the reception-side mobile communication terminal 60 by the transmission unit 16 (S16, transmission step). When the incoming call processing is completed, a response (MT forward SM) to the short message transmission (S05) from the SMS-GMSC 30 is performed from the SGSN / MSC 10 to the SMS-GMSC 30 (S17). Subsequently, a short message transfer response to the short message transfer request (S02) is made from the SMS-GMSC 30 to which the response has been made to the SM-SC 40 (S18).

  If the short message transmitted in S01 is a linked SMS, the processes in S05 to S18 are repeated for the number of divided short messages. The above is the processing executed by the SGSN / MSC 10 according to the present embodiment. Note that the determinations in S07, S09, S11, and S13 may be performed in any order. However, the determination in S07 is performed prior to the determination in S11.

  As described above, in the SGSN / MSC 10 according to the present embodiment, the short message addressed to the receiving-side mobile communication terminal 60 relates to the connected SMS, and the receiving-side mobile communication terminal 60 is a terminal that does not support connected SMS. In addition, the short message is converted from the linked SMS format to the general SMS format and transmitted. Therefore, according to the present embodiment, when the receiving-side mobile communication terminal 60 is a terminal that does not support connected SMS, it is possible to receive a short message in the form of connected SMS converted to the form of general SMS. That is, a short message in the form of linked SMS, which cannot be normally displayed, is displayed at the receiving-side mobile communication terminal 60 that is a terminal that does not support linked SMS.

  In addition, in the SGSN / MSC 10 as in the present embodiment, a more appropriate process can be performed by performing the conversion process immediately before the mobile communication terminal 60 on the receiving side. For example, in SM-SC 40, if the above conversion is performed when a short message is received, the recipient's terminal is different between when the short message is received and when it is distributed (particularly, distribution can be performed outside the service area, etc.). (Occurs when retransmission is necessary).

  Moreover, it is desirable to determine the type of the terminal on the transmission side as in the present embodiment and perform conversion based on the determination. For example, when the transmission source is a node of the mobile communication network N, it is not displayed on the receiving-side mobile communication terminal 60 such as a text message and referred to by the user, and a control signal is transmitted by the linked SMS May be. In such a case, there is no point in converting the linked SMS format to the general SMS format. As described above, it may not be appropriate to change the format depending on the transmission source of the short message. According to this configuration, it is possible to process an appropriate linked short message. However, conversion may be performed regardless of the transmission source.

  Also, if it is determined whether the short message is related to the control SMS before determining whether the short message is related to the concatenated SMS as in this embodiment, it is determined that the short message is related to the control SMS. It is only necessary to determine whether or not it is related to linked SMS, and the present invention can be implemented efficiently. However, it is not always necessary to determine whether the short message is control SMS.

It is a figure which shows the function structure of SGSN / MSC which is the short message control apparatus which concerns on embodiment of this invention. It is a figure which shows the data structure of the short message controlled by SGSN / MSC. It is a figure which shows the data structure of the user data part of the short message controlled by SGSN / MSC. It is a figure which shows the data structure of the information element in the user data of the short message controlled by SM-SC. It is a figure which shows the hardware constitutions of SGSN / MSC which is the short message control apparatus which concerns on embodiment of this invention. It is a sequence diagram which shows the process (short message control method) performed by SGSN / MSC which is a short message control apparatus which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... SGSN / MSC, 11 ... Reception part, 12 ... Determination part, 13 ... Function determination part, 14 ... Transmission origin determination part, 15 ... Conversion part, 16 ... Conversion part, 101 ... CPU, 102 ... RAM, 103 ... ROM DESCRIPTION OF SYMBOLS 104 ... Communication module 105 ... Auxiliary storage device 20 ... HLR 30 ... SMS-GMSC, 40 ... SM-SC, 50 ... Transmission side mobile communication terminal, 60 ... Reception side mobile communication terminal, N ... Mobile communication network .

Claims (5)

A short message control device for controlling a short message transmitted and received in a mobile communication network,
Receiving means for receiving a short message transmitted from the transmitting terminal to the receiving terminal;
A concatenated short message determining means for determining whether or not the short message received by the receiving means is of a form constituting a concatenated short message in which a plurality of short messages are concatenated into one message;
Function determination means for determining whether or not the receiving terminal has a function of processing the linked short message;
Transmission source determination means for determining whether or not the type of the terminal on the transmission side that has transmitted the short message received by the reception means is a mobile communication terminal;
The function determining means determines that the receiving terminal does not have a function of processing the connected short message , and the transmission source determining means determines that the type of the transmitting terminal is a mobile communication terminal. The short message determined by the connected short message determination means to be in a format constituting the connected short message is converted into a format that can be processed by a terminal that does not have a function of processing the connected short message. Conversion means;
Transmitting means for transmitting a short message whose format has been converted by the converting means to the receiving terminal;
A short message control device comprising: The connected short message determining means determines whether the short message received by the receiving means is a control short message, and when it is determined that the short message is a control short message, 2. The short message control device according to claim 1, wherein it is determined whether or not the format constitutes a concatenated short message. The short message control according to claim 1 or 2 , wherein the conversion means includes information indicating that the short message constitutes a concatenated short message in the short message after the format conversion. apparatus. The conversion means, as information indicating that the short message constitutes a concatenated short message, a total number of short messages constituting the concatenated short message and a number indicating how many of those short messages are 4. The short message control device according to claim 3 , wherein information indicating at least one of the short message is included in the short message after the format conversion. A short message control method for controlling a short message transmitted and received in a mobile communication network,
A receiving step of receiving a short message transmitted from the transmitting terminal to the receiving terminal;
A concatenated short message determining step for determining whether or not the short message received in the receiving step is in a form constituting a concatenated short message in which a plurality of short messages are concatenated into one message;
A function determination step of determining whether or not the receiving terminal has a function of processing the linked short message;
A transmission source determination step of determining whether or not the type of the terminal on the transmission side that has transmitted the short message received in the reception step is a mobile communication terminal;
In the function determining step, it is determined that the receiving terminal does not have a function of processing the connected short message , and in the transmitting source determining step, it is determined that the type of the transmitting terminal is a mobile communication terminal. The short message determined in the connected short message determination step is converted into a format that can be processed by a terminal that does not have a function of processing the connected short message. A conversion step;
A transmission step of transmitting the short message whose format has been converted in the conversion step to the receiving terminal;
A short message control method including:

Images