KR101253694B1 - Apparatus and method for automatic converting of communication mode using quality of service in mobile communication terminal - Google Patents

Abstract

The present invention relates to an apparatus and method for automatically switching a communication mode according to call quality in a mobile communication terminal. When a packet is received in a specific communication mode, a quality of service (QoS) of the received packet is referred to below. ), And switching the communication mode when the measured QoS is less than the reference value, to solve the problem of frequent interruptions or delays in the case of a video or voice call and to provide a more convenient service. There is an advantage to this.

Terminal, QoS, Call Quality, Mode Conversion, VoIP

Description

Device and method for automatic switching of communication mode according to call quality in mobile communication terminal {APPARATUS AND METHOD FOR AUTOMATIC CONVERTING OF COMMUNICATION MODE USING QUALITY OF SERVICE IN MOBILE COMMUNICATION TERMINAL}

1 is a block diagram showing the configuration of a mobile communication terminal according to the present invention; and

2 is a flowchart illustrating a method of automatically switching a communication mode according to call quality in a mobile communication terminal according to an exemplary embodiment of the present invention.

The present invention relates to a mobile communication terminal, and more particularly, to an apparatus and method for automatically switching communication modes according to call quality.

In general, VoIP is an IP telephony technology that delivers voice information using the Internet Protocol (IP) .It is not a traditional protocol based on a line such as a public switched telephone network (PSTN), but voice information in discrete packets. It is a protocol to make a phone call while inserting and transmitting a digital signal.

VoIP devices that make phone calls using VoIP acquire session information between both ends of VoIP devices through VoIP signaling, and are compressed through IP packets according to a predetermined address, channel, and voice codec scheme. In addition to the original IP function, it uses the Realtime Transport Protocol (RTP) to ensure that packets arrive at the correct time.

These VoIP devices have the advantage of integrating telephone service by utilizing existing IP network as it is, so that subscribers can receive long distance service and international call service with only local call rate in internet and intranet environment. Therefore, using the Internet to deliver real-time voice information is more economical than using a conventional telephone network, and the voice using the IP network because the Internet is widely available and can be conveniently used anywhere. Delivery techniques and devices are constantly being developed.

However, in the case of the VoIP, unlike a user who merely delivers voice, the more users who deliver voice, data, and multimedia, the more the load on the network is inevitably increased. In the case of simple large data, if there is a priority in the network so that it can be delivered even if the time is delayed, there is no big problem in the service, but in the case of a video call or a voice call using the VoIP, the conversation is frequently dropped or too delayed. In this case, there is a problem that the service itself cannot be performed because the meaning of actual use is lost.

An object of the present invention is to provide an apparatus and method for automatically switching communication modes according to call quality in a mobile communication terminal.

An object of the present invention is to provide an apparatus and method for automatically switching a communication mode when a quality of service (hereinafter referred to as 'QoS') in a mobile communication terminal is less than or equal to a reference value.

According to a first embodiment of the present invention to achieve the above object, a communication mode automatic switching method according to call quality in a mobile communication terminal, when a packet is received in a specific communication mode, the quality of the received packet (Quality) of Service (hereinafter referred to as 'QoS'), and the process of switching the communication mode when the measured QoS is less than the reference value.

According to a second embodiment of the present invention, a method for automatically switching a communication mode according to call quality in a mobile communication terminal is referred to as a quality of service (QoS) from a network in a specific communication mode. ) And a step of switching the communication mode when the received QoS is less than or equal to a reference value.

According to a first embodiment of the present invention to achieve the above object, the communication mode automatic switching device according to the call quality in the mobile communication terminal, when the packet is received in a specific communication mode, the quality of the received packet (Quality) of service (hereinafter referred to as a 'QoS') and a control unit for switching the communication mode when the measured QoS is less than the reference value.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Hereinafter, an apparatus and method for automatically switching communication modes according to call quality in a mobile communication terminal will be described.

1 is a block diagram showing the configuration of a mobile communication terminal according to the present invention. The mobile communication terminal includes a control unit 101, a memory 103, a key input unit 105, a display unit 107, and a communication unit 109.

Referring to FIG. 1, the controller (MPU: Micro-Processor Unit) 101 controls the overall operation of the mobile communication terminal. For example, it performs processing and control for voice communication and data communication, and according to the present invention, in addition to the usual function, the QoS measuring unit 111 is provided to automatically switch the communication mode according to the call quality (QoS) function. Process. Here, the QoS measuring unit 111 measures call quality such as processing capacity, transmission delay, accuracy and reliability by using time stamp information and sequence number of the received traffic packet. The measured call quality is provided to the controller 101. Therefore, in the following description, description regarding the processing and control of the normal control unit 101 is omitted.

The memory 103 may be composed of a ROM, a RAM, and a flash ROM. The ROM (Read Only Memory) stores the microcode of the program and various reference data for processing and control of the controller 101. In particular, according to the invention stores a program for automatically switching the communication mode in accordance with the call quality (QoS). It also stores call quality (QoS) reference values. The random access memory (RAM) is a working memory of the controller 101, and stores temporary data generated during execution of various programs. The flash ROM stores various updatable data for storage.

The key input unit 105 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, navigation keys (Or direction keys), buttons (▲ / ▼ / ◀ / ▶), and a plurality of function keys, and provide key input data corresponding to a key pressed by the user to the controller 101. The display unit 107 displays status information generated during the operation of the portable terminal, a limited number of characters, a large amount of video and still images, and the like. The display unit 107 may use a color liquid crystal display (LCD).

In addition, the communication unit 109 performs a function of transmitting and receiving a radio signal input and output through the antenna. For example, in the case of transmission, after channel coding and spreading data to be transmitted, RF (Radio Frequency) processing is performed, and in case of reception, the received RF signal is based on the received RF signal. It performs a function of restoring data by despreading and channel decoding.

2 is a flowchart illustrating a method of automatically switching a communication mode according to call quality in a mobile communication terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 2, in step 201, the controller 101 sets a communication channel in a bidirectional communication mode to transmit and receive a traffic packet with a counterpart terminal.

In step 203, the control unit 101 extracts header information such as a timestamp and a sequence number from the traffic packet received from the counterpart terminal, and determines the quality of service of the corresponding packet. 'QoS' is measured, and the process proceeds to step 205 to determine whether the measured QoS is equal to or less than a reference value. In other words, by using the time stamp field of the packet to extract the transmission time information, and comparing the extracted transmission time information and the reception time of the packet to determine whether a loss occurs by measuring the QoS of the packet do. In addition, QoS is measured by comparing the sequence number of the packet with the sequence number of the previous packet and calculating the loss of the packet. Here, the QoS of the packet may be measured directly by using the header information of the received packet as described above, or may receive a call quality (QoS) result from the network at a predetermined time period.

If the measured QoS is not less than or equal to the reference value, the controller 101 returns to step 203 to measure the QoS of the received packet. Request QoS improvement to (System). At this time, the network attempts to improve the communication channel QoS according to the request.

Thereafter, the controller 101 extracts time stamp information and a sequence number from the next traffic packet received in step 209 to measure the QoS of the corresponding packet, and in step 211, the measured QoS is a reference value. It is determined whether or not the QoS is successfully improved by checking whether it is equal to or less. In this case, the success or failure of the QoS improvement may be determined by directly measuring the QoS as described above or may be directly notified by the network (system).

When the QoS is successfully improved, the control unit 101 returns to step 203 to measure the QoS of the received packet. On the other hand, when it is determined that the QoS improvement fails, the control unit 101 notifies the user by displaying on the display unit 107 that the QoS of the communication channel is lowered and the service is stopped in step 213, and then the corresponding communication mode. To switch automatically. In this case, the counterpart terminal may also receive a message indicating mode switching from the terminal or the network.

In this case, the communication mode may be automatically switched as described above. However, in step 213, the QoS of the corresponding communication channel is lowered, and the display unit 107 indicates a communication mode that can be switched simultaneously with the corresponding communication mode. By displaying on, it is possible to allow a user to decide whether to keep the current communication mode or to switch to another communication mode despite the degradation of the QoS. In this case, the controller 101 can switch the communication mode of the terminal according to the communication mode selected according to the user's key operation.

In this case, the communication mode may be switched to a mode in which the user can continuously talk with the other party while maintaining the bidirectional communication mode. For example, it is possible to switch from the video call mode to the voice-oriented call mode according to the QoS, or to the instant message (IM) mode where there is no problem in the conversation even if there is a delay in the voice-oriented call mode. You may.

In addition, the communication mode may be switched from the bidirectional communication mode to the unidirectional mode. For example, the user may record and store a voice and a picture that the user intends to deliver, and may transmit the stored voice and a picture to a desired party. The text may be transmitted through a short message service (hereinafter, referred to as SMS). You can also pass in (text). An example of the one-way mode for transmitting the stored voice is Push to Talk (PTT), and the push-to-talk is a mode in which a user presses when delivering a speech and releases when talking. In addition, an example of the one-way mode for transmitting the voice as text includes a speech to text (STT), and the speech text conversion is performed by changing the speech to text and transmitting the text through SMS. Mode.

On the other hand, by adding a certain sequence to the switching of the communication mode, it is possible to switch from video call mode to voice-oriented call mode, voice-oriented call mode to instant message mode, and from instant message mode to SMS according to the QoS. . Here, if the QoS is improved, it may be improved back to the previous mode. In other words, the SMS may be switched to an instant message mode, the instant message mode to a voice-oriented call mode, and the voice-oriented call mode to a video call mode.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the 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 the equivalents of the claims.

As described above, the present invention provides an apparatus and method for automatically switching the communication mode to another communication means or communication mode such as message transmission in accordance with the call quality in the mobile communication terminal, so that the conversation is frequently performed in the case of a video or voice call. There is an advantage that can solve the problem of being cut off or delay and provide more convenient service.

Claims (15)

In the mobile terminal, the communication mode automatic switching method according to the call quality, Measuring a quality of service (hereinafter referred to as a 'QoS') of the first packet when the first packet is received in a specific communication mode; Requesting QoS improvement to the network when the QoS of the first packet is less than or equal to a reference value; Measuring QoS of the second packet when a second packet is received after requesting QoS improvement from a network; Switching the communication mode when the QoS of the second packet is equal to or less than a reference value. The method of claim 1, The QoS is measured by using at least one of a timestamp and sequence number information of the received packet. delete The method of claim 1, And when the specific communication mode is a video call mode, switch to a voice-oriented call mode. The method of claim 1, When the specific communication mode is a voice-oriented call mode, converting to an instant message (IM) mode. The method of claim 1, When the specific communication mode is an Instant Message (IM) mode, a transmission mode of a stored voice and image after recording, a Push to Talk (PTT) mode, a Speech to Text (STT) mode And switching to one of the methods. The method of claim 1, When the measured QoS is greater than or equal to a predetermined value, switching to a call mode with a higher QoS than the current. The method of claim 1, And outputting a message indicating a change of the communication mode to a display unit. The method of claim 1, The process of switching the communication mode, Outputting a type of communication mode that can be switched when the measured QoS is equal to or less than a reference value to a display unit; When one communication mode is selected, switching to the selected communication mode. In the method of automatically switching the communication mode according to the call quality in the mobile communication terminal, Receiving a quality of service (QoS) from a network in a specific communication mode; Requesting QoS improvement to the network when the received QoS is less than or equal to a reference value; And switching the communication mode when a QoS improvement failure is received from the network. delete 11. The method of claim 10, The process of switching the communication mode, Outputting a type of communication mode that can be switched when the received QoS is equal to or lower than a reference value to a display unit; When one communication mode is selected, switching to the selected communication mode. 11. The method of claim 10, And outputting a message indicating a change of the communication mode to a display unit. In the communication mode automatic switching device according to the call quality in the mobile communication terminal, QoS measurement unit for measuring the quality of service (hereinafter referred to as 'QoS') of the first packet when the first packet is received in a specific communication mode, When the QoS of the first packet is less than the reference value, and comprises a control unit for requesting the QoS improvement to the network, The QoS measuring unit measures a QoS of the second packet when a second packet is received after requesting a QoS improvement from a network. And the control unit switches the communication mode when the QoS of the second packet is equal to or less than a reference value. 15. The method of claim 14, The QoS measuring unit, And measure the QoS using at least one of a timestamp and sequence number information of the received packet.

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