KR20030034717A - Image call processing method of mobile telecommunication system - Google Patents

Abstract

PURPOSE: An image call processing method of a mobile communication system is provided to induce the conversion of an image call into a voice call to a transmitter without rejecting an image call in a case that a destination terminal can not apply the image call when there is an image call request. CONSTITUTION: A mobile terminal(10) is within a scope of an optional base station(20). The information of the mobile terminal(10) is transmitted to a mobile exchange(40) through base stations(20) and base station controllers(30) for controlling the base stations(20). The information transmitted from the mobile exchange(40) is transmitted to the mobile terminal(10) for receiving a mobile communication service through the base stations(20) and the base station controllers(30) for controlling the base stations(20). The base station(20) plays a role for making the mobile terminal(10) connect to the base station controller(30). The base station(20) consists of a DCU(Digital Channel Unit), a TCU(Timing/frequency Control Unit), a radio frequency unit and a global position system, and performs various functions for subscribers. The base station controller(30) connects the base station(20) to the mobile exchange(40) and controls the connection among base stations. The base station controller(30) also processes and applies a softer, soft and hard handover etc. and performs a signal processing function for the communication with the base station(20) and the mobile exchange(40). The mobile exchange(40) includes an embedded visitor location register. The mobile exchange(40) transmits/receives a signal to/from the base station controller(30), several base stations(20) and a base station management system and thus processes a call of a mobile communication subscriber.

Description

Image call processing method of mobile telecommunication system

The present invention relates to the field of video call processing in a mobile communication system, and in particular, by increasing the call setup rate of an exchange in a mobile communication system, a video call processing method capable of reducing inconvenience caused by a call setup re-request to a user; A computer readable recording medium having recorded thereon a program for realizing the above method.

At present, the mobile communication service, which is rapidly increasing worldwide, is required to transmit not only voice but also multimedia (video, high-speed data) information while moving. In particular, the progress of the standardization work on the next generation mobile communication system such as the IMT-2000 system for the third generation mobile communication service, which is currently in progress, it can be seen that the importance of the technology for high-speed data information transmission. . In the near future, high-speed information exchange using portable terminals is expected to become commonplace.

Although the video call service will soon arrive, the call processing method in the conventional mobile communication system is mainly designed in consideration of the voice call-oriented service, and there are still many technical supplements.

Considering only existing voice-oriented services, if the exchange rejects a call when a call is requested from a mobile terminal, if the called terminal cannot receive a call, if the called party does not answer a call, the radio resources of the network are insufficient. In this case, the calling / called terminal is not registered, the voice vocoder is different between the calling / called terminal.

In the case where the network radio resources are insufficient, the problem can be solved by using a code division multiple access (CDMA) technique, which is advantageous in that the capacity of the system is large on the service company side, and by securing sufficient frequency band. If the voice vocoder is different between the calling and receiving terminals, the problem can be solved in the form of converting the voice data format with all kinds of voice vocoder at the exchange.

Except for the above two cases, it is not a big problem as it is not a matter to be filed with the service company from the user's point of view.

However, when a video call service is introduced in a next generation mobile communication system such as an IMT-2000 system, a terminal capable of a video call service and an existing terminal that is not available will be mixed in the same service area, and a video call call request between these terminals is frequent. You lose. In particular, a problem occurs when a user of a terminal capable of a video call service makes a video call request to an existing terminal that does not have a video codec. The call processing method designed by considering only the existing voice-oriented service can only reject the call, and the calling terminal user is rejected after being informed that the called terminal is not capable of video service. In this case, the user must bear the inconvenience of the keypad operation that requires switching to a voice service if necessary.

Therefore, in the situation where the voice call-oriented second generation terminal and the third generation terminal are mixed in the same service area, when the terminal capable of video service requests the video call, the called terminal cannot support the video call, without rejecting the call. There is an urgent need for a method to induce a switch to a call service to increase the call setup rate of the exchange and to reduce the inconvenience of the call setup re-request to the user.

The present invention has been proposed in order to meet the above-described requirements. In a situation where a voice call-oriented second generation terminal and a third generation terminal of a mobile communication system are mixed in the same service area, a terminal capable of video service is a video call. On request, if the called terminal cannot support the video call, the video call processing method for inducing the caller to switch to the voice call service without rejecting the call and the computer readable recording of the program for realizing the method. The purpose is to provide a medium.

1 is an exemplary configuration diagram of a mobile communication system to which the present invention is applied.

2 is a flowchart of an embodiment of a video call processing method according to the present invention;

* Explanation of symbols for the main parts of the drawings

10: mobile terminal (MS) 20: base station (BTS)

30: base station controller (BSC) 40: mobile switching center (MSC)

In order to achieve the above object, the present invention provides a video call processing method between mobile terminals applied to an exchange in a mobile communication system, in response to a video call setting request from an originating terminal, the exchange refers to state information of a called terminal. A first step of checking whether the called terminal can support the requested video call; A second step of setting, by the exchange, the requested video call if the called terminal can support the requested video call according to the result of the checking of the first step; If the called terminal does not support the requested video call according to the check result of the first step, it is inquired to the calling terminal whether the exchange is willing to switch to the voice call service, and the timer T_WAIT is set. Driving to wait for the next event; In an event waiting state, when a user's response is received, the exchange deletes the timer T_WAIT and determines whether the caller has agreed to switch to a voice call service; According to the determination result of the fourth step, when the caller agrees to switch to the voice call service, the exchange sets the voice call and cancels the requested video call when the switch refuses to switch to the voice call service. A fifth step; And a sixth step of canceling the requested video call at the end of the timer T_WAIT.

Meanwhile, the present invention provides a video call request for the called terminal by referring to the status information of the called terminal in response to a request for setting up a video call from a calling terminal to a mobile communication switch having a processor for video call processing between mobile terminals. A first function of checking if it can support the; A second function for setting the requested video call when the called terminal can support the requested video call according to the test result of the first function; If the called terminal does not support the requested video call according to the test result of the first function, it is inquired to the calling terminal whether it is willing to switch to voice call service, and a timer T_WAIT is driven to A third function of waiting for an event; A fourth function of deleting, when the user's response is received in the event waiting state, the timer T_WAIT and determining whether the caller has agreed to switch to the voice call service; According to the determination result of the fourth function, when the caller agrees to switch to the voice call service, the exchange sets the voice call and cancels the requested video call when the switch refuses to switch to the voice call service. Fifth function; And a computer-readable recording medium having recorded thereon a program for realizing a sixth function of canceling the requested video call at the end of the timer T_WAIT.

According to the present invention, when the calling terminal is a terminal which cannot support the video call when the calling terminal requests the video call, the caller asks the calling terminal whether the caller is willing to switch the requested video call to the voice call, and the caller requests simple keypad operation. Or by using voice (if there is a voice recognition system), the user's inconvenience caused by the one-way call of the exchange.

To this end, the present invention, if the destination terminal does not support the video call, induces the call to switch to the voice call. That is, in the situation where the conventional voice call-oriented second generation terminal and the third generation terminal are mixed in the same service area, when the terminal capable of video service requests the video call, the called terminal cannot support the video call. To induce the caller to switch to voice call service.

According to the present invention, the call setup rate of the exchange can be increased, and the user can reduce the inconvenience of having to re-manipulate the keypad to change the call to voice rather than video.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration diagram of a mobile communication system to which the present invention is applied.

The mobile terminal (MS) 10 is within the scope of any base station (BTS) 20 and the information of the mobile terminal 10 travels via the base station 20 and the base station controller (BSC) 30 controlling them. The MSC 40 is transmitted to the mobile terminal 10 via the base station 20 and the base station controller 30 for controlling the information. Is the device needed to receive.

The base station (BTS) 20 serves to connect the mobile terminal 10 to the base station controller 30, and includes a digital channel unit (DCU) and a time / frequency control unit (TCU). ), Radio frequency unit (RFU: RadioFrequency Unit), global positioning system (GPS: Global Position System), etc., and various functions for mobile subscribers.

The base station controller (BSC) 30 connects the base station 20 to the mobile switching center 40 to coordinate the connection between the base stations 20, and processes and supports softeners, soft and hard handovers, It serves as a signal processing function for communication with the base station 20 and the mobile switching center 40.

For reference, a soft handover refers to a mobile handset 10 which is allocated a call channel from two base stations simultaneously while the mobile terminal 10 is in service between a serving base station 20 and a neighboring base station. The term "Hard Handover" refers to continuing the call by disconnecting the current frequency and changing to a new frequency supported by the neighboring base station when the frequencies used by the serving base station 20 and the neighboring base station are different.

The mobile switching center (MSC) 40 has a built-in visitor location register (VLR) and manages several base station controllers 30 that control the base station 20, a base station management system that manages the base station 20, and the base station controller 30. (BSM) and a signal, and serves to handle mobile subscriber calls.

Hereinafter, with reference to Figure 2 will be described a call processing method of the exchange to be proposed by the present invention.

2 is a flowchart illustrating an embodiment of a video call processing method according to the present invention.

First, upon receiving a video call setup request initiated from the mobile terminal 10 (201), the mobile switch 40 determines whether the called terminal supports the requested video call with reference to the status information of the called terminal in its database. (202).

If it is determined that the called terminal can support the requested video call, a process of setting the requested video call is performed (203). Here, the process of setting the requested video call 203 may include all processes of determining and processing in the call processing method of the prior art. For example, call rejection due to lack of radio resources or call rejection when the called terminal is busy.

If it is determined that the called terminal does not support the requested video call, the mobile switch 40 inquires of the calling terminal whether it is willing to switch to the voice call service, drives the timer T_WAIT (204), and then Wait for the event (205).

Here, when the mobile switcher 40 inquires of the calling terminal whether it is willing to switch to the voice call service, it should be made available to the user through the user interface of the terminal. For example, it may be a voice such as ARS, a text or an alarm sound. Upon detecting this, the user notifies the mobile switcher 40 whether to switch to the voice call service by simple keypad operation or voice (if there is a voice recognition system).

While waiting (205), if the user's response is received (206), the exchange deletes the timer (T_WAIT) (207) and checks whether the caller has agreed to switch to the voice call service (208).

If it is determined that the caller agrees to switch to the voice call service, the procedure for setting up the voice call is performed (211). Here, the process of setting up the voice call 211 may also include all the process of determining and processing in the call processing method of the prior art. For example, call rejection due to lack of radio resources or call rejection when the called terminal is busy.

As a result of the check, when the caller refuses to switch to the voice call service, the mobile switch 40 performs a process of canceling the requested video call (209).

On the other hand, when the waiting timer T_WAIT expires (210), the mobile switch 40 performs a process of canceling the requested video call (213).

Here, the process of canceling the requested video call (210, 213) may also include all the process of determining and processing in the call processing method of the prior art. For example, call rejection due to lack of radio resources or call rejection when the called terminal is busy.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention is inconvenient for a user due to one-way call rejection of an exchange that may frequently occur when attempting a video call between these terminals in a situation where a terminal capable of video calling and a terminal which are not available are mixed in the same service area. There is an effect to reduce.

Claims (4)

In the video call processing method between mobile terminals applied to the exchange of the mobile communication system, A first step of checking whether the called terminal can support the requested video call by referring to the state information of the called terminal in response to the video call setup request from the calling terminal; A second step of setting, by the exchange, the requested video call if the called terminal can support the requested video call according to the result of the checking of the first step; If the called terminal does not support the requested video call according to the check result of the first step, it is inquired to the calling terminal whether the exchange is willing to switch to the voice call service, and the timer T_WAIT is set. Driving to wait for the next event; In an event waiting state, when a user's response is received, the exchange deletes the timer T_WAIT and determines whether the caller has agreed to switch to a voice call service; According to the determination result of the fourth step, when the caller agrees to switch to the voice call service, the exchange sets the voice call and cancels the requested video call when the switch refuses to switch to the voice call service. A fifth step; And A sixth step of canceling the requested video call at the end of the timer T_WAIT; Video call processing method of mobile communication system including The method of claim 1, The exchanger, In a situation where a mobile call-oriented mobile terminal and a mobile terminal capable of voice and video services are mixed in the same service area, when the mobile terminal capable of video service requests a video call, the incoming mobile terminal cannot support the video call. A video call processing method of a mobile communication system, characterized by inducing a caller to switch to a voice call service without rejection. The method of claim 1, The exchanger, If the called terminal cannot support the video call when the calling terminal requests the video call, the calling terminal asks the calling terminal whether it is willing to switch the requested video call to the voice call, and the caller sends a simple keypad operation or voice. And answering the call, switching to a voice call service. In the mobile communication switch having a processor for video call processing between mobile terminals, A first function of checking whether the called terminal can support the requested video call by referring to the status information of the called terminal according to the video call setup request from the calling terminal; A second function for setting the requested video call when the called terminal can support the requested video call according to the test result of the first function; If the called terminal does not support the requested video call according to the test result of the first function, it is inquired to the calling terminal whether it is willing to switch to voice call service, and a timer T_WAIT is driven to A third function of waiting for an event; A fourth function of deleting, when the user's response is received in the event waiting state, the timer T_WAIT and determining whether the caller has agreed to switch to the voice call service; According to the determination result of the fourth function, when the caller agrees to switch to the voice call service, the exchange sets the voice call and cancels the requested video call when the switch refuses to switch to the voice call service. Fifth function; And A sixth function of canceling the requested video call at the end of the timer T_WAIT A computer-readable recording medium having recorded thereon a program for realizing this.