KR20050078501A - Method and system for forwarding of short message in a mobile communication system - Google Patents

Abstract

The present invention relates to a call forwarding method of a short message in a mobile communication system.

The method according to the present invention includes a home location register having information on a mobile terminal and a short message center for transmitting a short message delivered to the mobile terminal, the call forwarding of the short message to the mobile terminal. The method may further include: requesting, by the short message center, location information for short message delivery to the mobile terminal when the short message is received by the mobile terminal, and the home location register for short message delivery. When the mobile station requests the location information, the mobile terminal checks whether the short message is in a callable state. If the call is impossible, it checks whether the call forwarding is set. Delivering a message to the short message center; The short message center checks whether the forwarding phone number is capable of forwarding the short message when receiving a message indicating the forwarding phone number and the forwarding setting, and if the short message is available, the short message is sent to the forwarding phone number. It involves the process of performing the delivery.

Description

Short message forwarding method and system in mobile communication system {METHOD AND SYSTEM FOR FORWARDING OF SHORT MESSAGE IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to a method and system for call forwarding of a call in a mobile communication system, and to a method and system for delivering a short message in a mobile communication system.

In general, mobile communication systems have been developed to handle voice calls. However, according to user's demand and rapid development of technology, it has been developed in the form of supporting short data service and high speed packet data service. In the mobile communication system, there is a short data service which is most widely used besides voice calls. This short data service is a form of service that is widely used called short message or text message.

On the other hand, the mobile communication system is a system that guarantees the mobility of the user can be provided with a communication service even if the user has a mobile terminal and move to any place. However, a user may not be able to use or use the mobile terminal due to special circumstances. For example, there may be a situation in which the mobile terminal is lost or its terminal is in a broken state or the terminal is not brought. In this case, a method for switching a voice call to a mobile terminal has been developed and used. This call switching is a method for preventing a call from becoming impossible because the user does not have a mobile terminal when a voice call is received to his mobile terminal.

That is, a method of switching the incoming call to the wired or another mobile terminal where the mobile call is located with respect to the voice call to the mobile terminal. Looking at this method in more detail as follows.

In general, a mobile communication system stores user information in a home location register (hereinafter referred to as "HLR"). Therefore, when the caller requests a call to the mobile terminal, the MSC of the mobile communication system performs an inquiry to the HLR to check the state information or the location information of the mobile terminal. The HLR then informs the switch of the mobile communication system of the current state or location information of the mobile terminal. At this time, the location information delivered by the HLR to the MSC may further include information such as whether the call forwarding is set and whether the call forwarding condition is satisfied. The call forwarding condition may be a call forwarding condition or the like at a specific time by the user of the power of the mobile terminal.

The HLR transmits to the MSC whether the call forwarding condition is satisfied. The MSC then performs call forwarding if the condition is met. If an incoming call is requested to a mobile terminal of another mobile communication system, the call is transferred to an exchange of a mobile communication system requiring call forwarding. When the call is requested to a specific terminal of the wired communication system, an operation for performing call forwarding to the corresponding terminal is performed.

Call forwarding described above is performed only for the voice service. By the way, the text service is a large part of the current service type. Nevertheless, there is no call forwarding for text service. Therefore, when the mobile communication service provider is changed or the number of the mobile terminal is changed, or when another mobile terminal is used due to the loss, non-holding status or failure of the mobile terminal as described above, the call forwarding of the text service is not made. There was no problem.

Accordingly, an object of the present invention is to provide a call forwarding method and system for text service data received by a mobile terminal in which call forwarding is set in a mobile communication system.

Another object of the present invention is to provide a method and a system capable of performing call forwarding after checking whether the text service data received by the mobile terminal can be forwarded when the call forwarding is set in the mobile communication system.

The method of the present invention for achieving the above objects, the mobile terminal in a mobile communication system comprising a home location register having information about the mobile terminal and a short message center for transmitting a short message to the mobile terminal; A method of transferring a short message to a short message, the short message center requesting location information for transmitting a short message to the mobile terminal to the home location register when the short message is received by the mobile terminal, and the home location register. The mobile station checks whether the mobile terminal is in a callable state when a request for location information for short message transmission is performed, and checks whether call forwarding is set when the call forwarding state is not set. Short message with message informing call forwarding settings with And the short message center checks whether the forwarding phone number is capable of forwarding the short message when receiving the message indicating the forwarding phone number and the forwarding setting and if the forwarding of the short message is possible. And performing a short message transmission to the set phone number.

The message indicating the call forwarding setting is defined by using one of undefined values when the IS-41 MAP protocol is used.

The system of the present invention for achieving the above objects, the mobile terminal in a mobile communication system including a home location register having information on the mobile terminal and a short message center for transmitting a short message delivered to the mobile terminal. A call forwarding system of a short message, comprising: requesting location information for a short message delivery to the mobile terminal from the home location register when a short message is received by the mobile terminal, and notifying a call forwarding telephone number and a call forwarding setting; A short message center that checks whether the forwarding phone number is capable of delivering a short message upon reception, and performs a short message delivery to the telephone number to which the forwarding is set when the short message is available, and a location for short message delivery; The mobile terminal sends a short message when requesting information. Checking whether the call forwarding status is set, and if the call forwarding status is set, if the call forwarding status is set, and when the forwarding status is set, forwarding a message indicating the forwarding phone number and the call forwarding setting to the short message center. It includes a home location register.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a signal flowchart of nodes and respective nodes required for call forwarding of a text message in a mobile communication system according to an exemplary embodiment of the present invention. Hereinafter, a process in which call forwarding of a text message is performed and signals processed in each node will be described in detail with reference to FIG. 1.

In FIG. 1, the base station controller (BSC) and the base station (BTS) constituting the connection between the mobile switch and the mobile station are not shown. First, the nodes of FIG. 1 will be described. Mobile terminal (MS_0) 100 is the originating terminal of the text message. The mobile terminal 100 which transmits such a text message may be an actual mobile terminal, and any device capable of transmitting a text message via the Internet may be used. However, in the following description, it is assumed to be a mobile terminal for better understanding of the description. The first switching system (MSC_0) 110 is also a switch of a mobile communication system including a mobile terminal to which a text message is to be received. In addition, a text message center (SMC) 120 capable of performing call forwarding of a text message according to the present invention is a text message center belonging to a first switching system, and a text message is received from a mobile terminal according to the present invention. When the call is received, the call forwarding of the text message is performed. The first home location register (HLR # 1) 130 is a home location register of the system to which the first switching system belongs. The first home location register (HLR # 1) 130 includes location information of the mobile terminal, call forwarding setting information of voice and text, and various other mobile terminals. Save it.

The second home location register (HLR # 2) 140 is a home location register of a mobile communication system including a mobile terminal in which call forwarding is set. The second home location register 140 may also store location information of the mobile terminal, call forwarding setting information of voice and text according to the present invention, and various other mobile terminal information. The second exchange system (MSC_T) 150 is a switch capable of communicating with a mobile terminal capable of performing call forwarding of a text message according to the present invention. In addition, the second exchange system 150 may receive a text message received by being forwarded from another system and forward the text message to a corresponding mobile terminal. Finally, the destination mobile terminal (MS_T (B)) 160 is a mobile terminal in which call forwarding of a voice call and / or text message is set.

Then, the signal flow and the operation of each node in the call forwarding of the text message according to the above configuration will be described in detail. When the originating mobile terminal 100 generates and transmits a text message in step 200, it passes through the base station (not shown) and the base station controller (not shown) to the first switching system 110 in the form of ADD_Deliver. Delivered. In operation 202, the first exchange system 110 generates and delivers a short message delivery point to point (SMDPPP) for short message delivery to the text message center 120 for text message transmission. Then, the text message center 120 generates and responds to a response message (smdpp) in step 204. Accordingly, the first exchange system 110 generates an Ack message in step 206 and delivers it to the calling mobile terminal 100.

In addition, the text message center 120 transmits an SMSRequest (MDN = A) message to the first home location register 130 in step 208. The transmitted message is a message for inquiring the location of the destination mobile terminal to which the text message is to be transmitted. When the inquiry message arrives as described above, the first home location register 130 searches its own database and generates state information of the called mobile terminal, and transmits it to the text message center 120 in step 120.

In this case, if the call forwarding of the text message of the incoming mobile terminal is set, the call forwarding of the text message is requested to a specific mobile terminal, and if the condition of the call forwarding is satisfied, a response message including information for notifying smsrequest is included. Generated as and forwarded to the text message center 120. According to the present invention, in order to notify the call forwarding of the text message, the smsrequest message, which is a response message, must be defined to inform the short message access rejection reason (SMS_AccessDeniedReason) information. Therefore, you can use one of the unused values. For example, in a system using the IS-41 MAP protocol, a value of 255 that is not used among the values set in the SMS_AccessDeniedReason can be set in the protocol. These values can be defined by using any one of the unused values, so there is no need to specifically limit the above values. In addition, whether handoff conditions are satisfied, call forwarding must be set. In addition, even when call forwarding is set, the call forwarding may be classified into an unconditional call forwarding or a call forwarding when the power is turned off or a call forwarding in a specific time period. Therefore, the first home location register 130 checks whether the call forwarding condition is satisfied by using these conditions and transmits the above message to the short message center 130 when the condition is satisfied. In addition, the message transmitted in step 210 should be forwarded to the call forwarding telephone number. Accordingly, the short message center 120 is required to forward the short message, and upon receiving the forwarding phone number, the short message center 120 may perform a subsequent operation accordingly.

When the short message center 120 receives the call forwarding request and the call forwarding phone number, the short message center 120 first checks whether it is a phone number of a terminal capable of transmitting a text message. In general, it is currently impossible to transmit a text message to a wired terminal. Therefore, when a number of a regular landline telephone is received, the short message transmission is stopped. But for ISDN wired phones, there is a data line, so if a short message delivery is possible, this can be done. In addition, if the wired system is changed so that the wired telephone can transfer the short message to the ring signal, and the like, the wired terminal can transfer the short message. However, since these matters are not general matters, the mobile terminal will be described as an example.

If the short message center 120 checks the call and the short message can be transferred, the mobile terminal transmits the text message to the home location register of the mobile communication system corresponding to the call forwarding telephone number. In order to obtain the location information of the switched mobile terminal 160 generates and delivers an SMSRequest (MDN = B) message. The SMSRequest message becomes a message of the same type as the message described in step 208. As described above, in the case of the text message, since the short message center 120 performs an operation for direct message transfer processing, call forwarding is generally performed. Therefore, the mobile communication switching system does not receive and process the short message again, thereby enabling faster data processing and reducing the load on data transmission.

The second home location register 140 generates a smsrequest message as a response signal when the request for the location information of the mobile terminal for which call forwarding is set exists, and generates a short message center ( 120). Information included in the response message includes the ID (MSID) of the mobile terminal, the phone number (ESN) of the mobile terminal, and the address of the mobile switching system where the mobile terminal is located, that is, the second switching system 150 (SMS_Address = MSC_T). Include information.

When the short message center 120 receives the message as described above, the short message center 120 generates and transmits an SMDPP message for short message delivery to the second exchange system 150 corresponding to the mobile switching system. Accordingly, the mobile switching system 150 transmits an ADDS_Deliver message to the call forwarding mobile terminal 160. That is, it delivers a short message. In fact, the short message is transmitted to the mobile terminal 160 through which the call forwarding is set through the base station controller connected to the lower part of the second switching system 150 and the base station.

After receiving the ADDS_Deliver message, the mobile station 160 configured for call forwarding transmits a response signal Ack thereto to the second mobile switching system 150 through the base station and the base station controller. Accordingly, upon receiving the response signal, the second mobile switching system 150 notifies the short message center that the short message has been delivered in the smdpp message. This allows the delivery of short messages. However, if the mobile terminal 160 for which call forwarding is set is turned off or located in an unreceivable area, the second home location register 140 transmits it to the short message center 120 as a response signal. . The short message center 120 then suspends the delivery of the short message that needs to be transferred and then attempts to deliver it again according to the delivery process of the reserved message. In the present invention, the process of delivering the held message is not described in detail.

As described above, when performing the short message forwarding according to the present invention, the forwarding can be performed while minimizing the network (Network) which is currently providing the service of the short message. There is an advantage that can be done.

1 is a signal flow diagram of nodes and respective nodes required for call forwarding of a text message in a mobile communication system according to an embodiment of the present invention.

Claims (3)

In the mobile communication system comprising a home location register having information on a mobile terminal and a short message center for transmitting a short message delivered to the mobile terminal, the method of the call forwarding method of the short message to the mobile terminal, The short message center, when the short message is received by the mobile terminal, requesting location information for transmitting a short message to the mobile terminal by the home location register; When the home location register requests the location information for the short message transmission, the mobile terminal checks whether the mobile terminal is in a callable state and, if the call forwarding state is set, when the call forwarding is set, when the call forwarding is set. Forwarding a forwarding phone number and a message informing about the forwarding setting to the short message center; The short message center checks whether the call forwarding phone number is capable of delivering a short message when receiving a message indicating a call forwarding phone number and a call forwarding setting, and if a short message is available, the short message is sent to the call forwarding set phone number. Said method comprising performing a delivery. The method of claim 1, The message indicating the call forward setting is defined by using one of the undefined values when using the IS-41 MAP protocol. In a mobile communication system comprising a home location register having information on a mobile terminal and a short message center for transmitting a short message delivered to the mobile terminal, the call forwarding system of the short message to the mobile terminal, When the short message is received by the mobile terminal, the home location register requests the location information for delivering the short message to the mobile terminal, and the call forwarding telephone number is short when receiving a message indicating a call forwarding setting and a call forwarding setting. The short message center which checks whether a message can be delivered and performs a short message delivery to a telephone number to which the call forwarding is set when the short message can be delivered; Upon requesting location information for short message delivery, the mobile terminal checks whether the short message is in a callable state. If the call is impossible, the mobile terminal checks whether call forwarding is set. And the home location register to forward a message informing about the call forwarding setting to the short message center.