KR20050071723A - Method for notifying state of relative terminal in mobile communication system - Google Patents

Abstract

The present invention relates to a method for informing a sender terminal of a status of a counterpart terminal in a mobile communication system. The present invention relates to a process of attempting to connect a call to a receiver terminal when a call is received, and to a caller terminal when the call connection fails. Forming a communication path, transmitting a guide message for guiding an additional service through the communication path, checking whether a dual tone multi frequency (DTMF) signal is received, and receiving the DTMF signal when receiving the DTMF signal Analyzing the signal to determine the service requested by the sender terminal; and when the sender terminal requests the "callable notification service", the telephone number of the sender terminal is transmitted to a home location register (HLR). Registering to set a callable notification service; and setting up a callable notification service, accessing the home location register to receive the call. Checking the state of the terminal and determining whether the call is available; and if the receiver terminal is in the callable state, generating a short message indicating a call availability state and transmitting the generated short message to the sender terminal. Include.

Description

Method for informing the status of counterpart terminal in mobile communication system {METHOD FOR NOTIFYING STATE OF RELATIVE TERMINAL IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a method for informing a state of a counterpart terminal in a mobile communication system, and in particular, a method for informing a caller terminal of an available call state by using a short message service (SMS) when the counterpart terminal is out of a call impossible state. It is about.

Mobile communication terminals are rapidly spreading due to the convenience of portability, and thus service providers (terminal manufacturers) are competitively developing more special functions or services to secure a large number of users.

For example, service providers offer a variety of services, such as caller ID, spam SMS blocking, automated connection, call forwarding, caller ID, call waiting, and catch call. . In particular, the catch call service is a service that informs a received call using a short message when the power is turned off or in a shadow area. Therefore, the terminal user can know the incoming call when the power is off or in the shaded area.

In general, a call is automatically connected to a voice message system (VMS) when the counterpart terminal is not in a call state as described above. At this time, the voice message system notifies the sender terminal that the other terminal cannot answer the call and asks whether the voice message is stored. When the user of the sender terminal leaves a voice message, when the counterpart terminal enters a state capable of receiving a call, the user of the sender terminal notifies the existence of the voice message through a short message. As a result, the counterpart terminal can know the incoming call without receiving the call.

However, the user of the sender terminal cannot know at all whether the counterpart terminal is in a state capable of answering a call or in a state capable of answering a call. Therefore, there is a problem that you must make a call repeatedly if the phone does not work. If the sender can know the status of the counterpart terminal, it is possible to minimize unnecessary labor and waste of resources (battery, channel occupancy, etc.) caused by repeated telephone calls.

Accordingly, an object of the present invention is to provide a method for informing a caller terminal of a call availability state using a short message service (SMS) when a counterpart terminal is out of a call impossible state in a mobile communication system.

According to an embodiment of the present invention for achieving the above object, in a higher system of the mobile communication system, in a method for informing the sender terminal of the status of the other terminal, when a call (call), the call connection to the receiver terminal Attempt process, when the call connection failure, the process of forming a call path with the sender terminal, and sending a guide message for guiding additional services through the call path, and checks whether a DTMF (Dual Tone Multi frequency) signal is received Determining the service requested by the sender terminal when the DTMF signal is received, and when the sender terminal requests the "callable notification service". Registering a caller terminal's telephone number in a home location register (HLR) and setting up a call notification service; After setting the mobile station, accessing the home location register, checking a state of the receiver terminal and determining whether the call is in a possible state, and when the receiver terminal is in a callable state, generating a short message informing of the available state. And transmitting the generated short message to the sender terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, the present invention will be described a method for informing the sender terminal that attempted to make a call in the unavailable state through the Short Message Service (SMS) when the opposite terminal is out of the incapable state in the mobile communication system. .

1 illustrates a network configuration of a schematic mobile communication system according to the present invention. This is a general mobile communication network structure, and the names of the components are different, but they are also common to IS-95A / B, GSM, IS-2000, WCDMA, and UMTS.

Referring to FIG. 1, a mobile station (MS) 8 represents a mobile communication terminal carried by a user. The mobile station 7 may be a legacy voice center that does not support IP or a terminal that supports IP. A base transceiver system (BTS) 6 manages radio resources, and is a device that substantially exchanges information with a mobile communication terminal through a radio link. A base station controller (BSC) 5 is a device for controlling base stations (BTSs), and supports signal protocols such as call setup and release.

MSC (Mobile Switching Center) / Gateway (GW: Gateway) (3) is a device that connects the mobile communication network and the Internet (Internet), PSTN (Public Switched Telephone Network) and PSDN (Public Switched Data Network). Protocol conversion is supported. The gateway GW may be called a logical name such as a packet data service node (PDSN), an access gateway (AGW) or a media gateway (MGW). The visit location register (VLR) 4 temporarily stores the location and subscriber information of the mobile communication terminal located in the communication area of the mobile switch 3. The Home Location Register (HLR) 1 stores and manages subscriber information, additional service information for each subscriber, and location information of a mobile communication terminal.

On the other hand, Short Message Service Center (SMSC) (71), which provides short message service, Billing Data System (BDS) 72, which collects and stores billing data, provides voice guidance service. A number of additional services that provide a variety of additional services, such as a Remote Message Control (RFC) server (7z) that provides remote control services such as Voice Message System (VMS) 73 and call forwarding services. It comprises a service node (71-7z).

Next, the operation of the present invention will be briefly described with reference to the configuration of FIG. 1.

First, it is assumed that the terminal 8p tries to talk to the terminal 81 and the terminal 81 is in a shaded area. When the call of the terminal 8p reaches the mobile switching station 31, the mobile switching station 31 accesses the home location register 1 to check the information (location, etc.) of the terminal 81, and then the A call connection is attempted to the terminal 81. If the call connection fails, the call of the terminal 8p is connected to the voice message system 73.

Subsequently, when a call path is connected between the terminal 8p and the voice message system 73, the voice message system 73 connects a failed message (for example, the phone is turned off) through the call path. If you want to leave a voice mail message, press 1; to apply for call notification, press 2). In addition, the DTMF (Dual Tone Multi Frequency) signal received through the call path is checked to confirm the button information pressed by the user. If the user selects the second (callable notification service), the voice message system 73 registers the telephone number of the terminal 8p in the home location register (the area of the receiver terminal) to notify the call availability. Set up the service.

Thereafter, when the terminal 81 escapes the shadowed area, the mobile switching center 31 requests the short message service center 71 to transmit a short call notification service short message. Then, the short message service center 71 generates the callable notification service short message and transmits the generated short message to the terminal 8p. The user of the terminal 8p confirms that the terminal 81 is in a callable state by checking the short message. On the other hand, the user can perform a call directly to the terminal 81 by pressing the call button after checking the short message.

2 is a block diagram of a mobile communication terminal according to an embodiment of the present invention. In the following description, the mobile communication terminal includes a cellular phone, a personal communication system (PCS), a personal data assistant (PDA), an international mobile communication-2000 (IMT2000) terminal, and the like. The following description will be described with the general configuration of the above examples.

Referring to FIG. 2, a controller (MPU: Micro-processor unit) 100 controls the overall operation of the mobile communication terminal. For example, it performs processing and control for voice call and data communication. The program memory 102 stores a program for controlling the overall operation of the radiotelephone. The program memory 102 may use a flash memory. The data memory 104 temporarily stores data generated during the operation of the mobile communication terminal. The data memory 104 may use a random access memory (RAM). The nonvolatile memory 106 stores telephone numbers and system parameters registered to perform functions such as speed dialing. The nonvolatile memory 106 may use an EEPROM.

The keypad (key pad) 108 is a numeric key buttons of 0-9, menu button (menu), cancel button (clear), confirmation button, call button (TALK), end button (END), Internet access button, A plurality of function keys such as navigation key buttons (▲ / ▼ / ◀ / ▶) are provided, and key input data corresponding to a key pressed by the user is provided to the controller 100.

The display 110 displays status information generated during the operation of the mobile communication terminal, a limited number of characters, a large amount of video and still images, and the like. The display unit 110 may use a liquid crystal display (LCD).

The codec (Coder-Decoder) 112 connected to the control unit 100 and the microphone 114 and the speaker 116 connected to the codec 112 are voice input / output blocks used for phone calls and voice recording. . The codec 112 converts the PCM data provided from the controller 100 into an analog voice signal and transmits the same through the speaker 116 and converts the voice signal received through the microphone 114 into PCM data. Provided to the controller 100.

In addition, the RF unit (Radio Frequency unit) (120) is the frequency of the radio frequency signal received via the antenna 118 is provided to the baseband processing unit 122 by lowering the frequency, the baseband signal from the baseband processing unit 122 The frequency is raised and transmitted through the antenna 118. The baseband processor 122 processes a baseband signal transmitted and received between the RF unit 120 and the controller 100. For example, in case of transmission, channel coding and spreading of data to be transmitted are performed, and in case of reception, despreading and channel decoding of a received signal are performed. .

3 illustrates a procedure performed by a higher system in a mobile communication system according to an exemplary embodiment of the present invention. As described above, as described above, the mobile switching center 3, the voice message system 73, the home location register 1 and the short message service center 71 of the unit systems constituting the mobile communication system are linked to each other. This is a procedure to perform. Therefore, the subject of performance will be described collectively as a higher system without being limited to a specific unit system.

Referring to FIG. 3, first, in step 301, the upper system checks whether a call is received from a lower system (base station system). Upon receipt of the call, the host system extracts the recipient number from the received call in step 303 and attempts to connect the call to the extracted recipient number in step 305.

The host system checks whether the call connection fails in step 307. For example, the connection failure occurs when the receiver terminal is powered off or when the receiver terminal is in a shaded area. If the call connection is successful, the host system proceeds to step 329 to perform a general call mode. If the receiver terminal is turned off or there is a shadow area and the call cannot be connected, the host system proceeds to step 309 to form a call path with the sender terminal (or caller terminal).

After establishing a call path with the sender terminal, the host system fails to connect to the sender terminal through the call path in step 311. Press 2 to request call service notification).

After sending the connection failure message, the upper system checks whether a dual tone multi frequency (DTMF) signal is received through the call path in step 313. When the DTMF signal is received, the host system analyzes the received DTMF signal in step 315 to obtain button information pressed by the user. In operation 317, the higher-level system determines whether the user selects a call possibility notification service based on the button information.

If the call notification service is not selected, the host system proceeds to step 331 to perform a corresponding function according to the service selected by the user. If the call availability notification service is selected, the host system proceeds to step 319 to set the call availability notification service by storing the telephone number of the sender terminal in a home location register (area of the receiver terminal).

After setting up the call function notification service, the host system accesses the home location register in step 321 to check the state of the receiver terminal. In step 323, the host system checks whether the receiver terminal is in a callable state. If not, the host system returns to step 321 to check the status of the receiver terminal again. If the call is in the available state, the host system proceeds to step 325 to create a short message informing of the available state. For example, the content of a short message could be written as "123-456-7890 is ready to receive a call. Please press the call button to call immediately." In addition, the phone number of the receiver terminal is stored in the sender number storage area of the short message so that the user can make a call to the receiver terminal by immediately pressing a call button after confirming the short message.

After creating the short message as described above, the host system proceeds to step 327 and transmits the short message to the sender terminal and ends.

4 illustrates a procedure performed by a terminal (sender terminal) in a mobile communication system according to an embodiment of the present invention. In particular, the algorithm described below is for explaining a process in which a user of a sender terminal performs a call to a receiver terminal by immediately pressing a call button after confirming a short message available for a call notification service.

Referring to FIG. 4, first, the control unit 100 checks whether a call notification service short message is received. If the short message is not received, the controller 100 proceeds to step 409 to perform a corresponding mode (eg, standby mode). If the callable notification service short message is received, the control unit 100 proceeds to step 403 where the contents of the received short message (eg, 123-456-7890 can receive a call. Press the call button. 12/24 8:33 P 123-456-7890) is displayed on the display.

In the state where the content of the short message is displayed, the controller 100 proceeds to step 405 and checks whether a call button (or a call button) is input by a user's operation. If the call button input is detected, the controller 100 proceeds to step 407 to automatically transmit to the sender number 123-456-7890 included in the short message. In this way, after confirming the call possible notification service short message, the call can be immediately entered by pressing the call button.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described above, the present invention can notify the sender terminal that attempted the previous call through SMS of the state (callable state) of the terminal in the higher-level system, thereby preventing the sender from attempting a wasteful call. That is, there is an advantage that can eliminate unnecessary labor and costs (battery, channel occupancy, etc.) caused by repeated telephone calls.

1 is a diagram illustrating a network configuration of a schematic mobile communication system according to the present invention.

2 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

3 is a diagram illustrating a procedure performed by a higher system in a mobile communication system according to an embodiment of the present invention.

4 is a diagram illustrating a procedure performed by a terminal in a mobile communication system according to an embodiment of the present invention.

Claims (4)

A method for informing a sender terminal of a status of a counterpart terminal in a higher system of a mobile communication system, Attempting to connect a call to a called terminal when receiving a call; When the call connection fails, forming a call path with a sender terminal; Transmitting a guide message for guiding an additional service through the communication path, and checking whether a dual tone multi frequency (DTMF) signal is received; When receiving the DTMF signal, analyzing the received DTMF signal to determine a service requested by the sender terminal; When the sender terminal requests a "callable notification service", setting a callable notification service by registering a telephone number of the sender terminal in a home location register (HLR); After setting the call notification service, accessing the home location register to check a state of the receiver terminal and determine whether a call is available; When the called terminal is in a callable state, generating a short message indicating a callable state and transmitting the generated short message to the sender terminal. The method of claim 1, And recording the telephone number of the receiver terminal in the sender number storage area of the short message so that a user of the sender terminal can immediately make a call to the receiver terminal by pressing a call button. The method of claim 1, The guide message is characterized in that the voice message system (VMS) is sent out. The method of claim 1, The short message is characterized in that it is generated in a Short Message Service Center (SMSC).