KR100677442B1 - Methods and apparatus' of safeguarding multimedia communication quality for mobile phone - Google Patents

Abstract

According to the present invention, when the mobile terminal fails to transmit or receive the video signal, the call connection is automatically cut off. Therefore, the charge is interrupted. The call request is set by the control unit, and the wireless unit inputs the video signal through the download unit. When the accumulated error value exceeds the threshold, the timer unit is driven and the reference video signal is transmitted.If the reference video signal is not received until the timer count is completed, the transmission request is repeatedly sent. If the number exceeds the reference value, the call is disconnected.If the video signal is input in units of frames, the compression unit is monitored to check if the compression is in progress.If the compression is in progress, the input frame is deleted. Request for disconnection, and during the time when the incapable state of the video signal is When the characteristic configuration for releasing a call connection in, and further, the call connection process, if it is determined that the call connection request to the communication control unit and setting the wireless transmission path; A frame process of inputting frame-by-frame when an image signal to be transmitted to the counterpart is input; The control unit determines whether the compression unit is currently in progress or in the air, and if it is in the air compression process for compressing the input frame video signal for wireless transmission; The compression unit deletes the frame video signal when the compression is in progress, and deletes the call connection when the cumulative number of deleted frames exceeds the reference value.

Description

Communication quality protection device and method of mobile terminal {METHODS AND APPARATUS 'OF SAFEGUARDING MULTIMEDIA COMMUNICATION QUALITY FOR MOBILE PHONE}

1 is a functional configuration diagram of a general mobile communication system,

2 is a flow chart of a communication blocking method of a mobile terminal according to the prior art;

3 is a functional diagram of a communication quality protection device of a mobile terminal according to the present invention;

4 is a flowchart illustrating a method for protecting transmission video signal communication quality of a mobile terminal according to the present invention;

5 is a flowchart illustrating a method for protecting received video signal communication quality of a mobile terminal according to the present invention;

6 is a flow chart of a communication quality protection method according to the surrounding environment of the present invention.

          ** Explanation of symbols on the main parts of the drawing **

100: wireless unit 110: control unit 120: memory unit

130: timer unit 140: input and output unit 150: error detection unit

160: compression unit 170: download unit

According to the present invention, when a data error of a predetermined size or more occurs in a multimedia communication state of a mobile terminal, the connected call is cut off. In particular, when a normal multimedia communication progress is difficult by monitoring data processing and load of the mobile terminal, the connected call is disconnected. The present invention relates to a communication quality protection device and a method of a mobile terminal for automatically blocking a call.

The mobile terminal for mobile communication (MS: MOBILE STATION) monitors the mobile switching center (MSC) while moving freely in the service area formed by the corresponding base station (RAN: RADIO ACCESS NETWORK) of the registered system. It is a high-tech wireless communication device that communicates instantly with the desired party anytime, anywhere through the communication path set by the control and switching, and moves anywhere while the individual always carries it directly.

The service area formed by the base station (RAN) is limited, and since a plurality of base stations are continuously arranged at regular intervals, the whole country is formed as a mobile communication service area, and an operating state of the plurality of base stations is controlled and monitored by a mobile switching center.

As described above, due to the configuration of a mobile communication system that requires the installation and operation of multiple base stations (RANs), the mobile communication service usage fee is relatively expensive.

In the first generation, the mobile communication system communicated using only a voice level signal. In the second generation, the mobile communication system developed a data communication method using a text message. In the current third generation (3GPP) mobile communication system, a voice signal and a text signal are used. Evolved into a multimedia-class communication system including video and video signals.

Since the third generation mobile communication system transmits a large amount of data without error by using an allocated channel, the operator takes more cost to maintain a stable system, and the multimedia communication cost occupying the channel becomes more expensive.

Since the portable terminal is manufactured in a small size and light weight for mobility and portability, it is small in size and limited in configuration, and there is a limitation in processing power of related resources such as a processor and a memory.

In the multimedia communication of the portable terminal, transmission errors may occur in the multimedia data transmitted wirelessly due to a change in the surrounding environment, or the load may increase due to the processing capacity limitation of the portable terminal.

When a data error is detected in the multimedia communication process, the mobile terminal repeatedly requests retransmission, and if the load increases, the mobile terminal keeps the line occupancy even though normal communication is not progressed due to the processing capacity limit. There is a problem.

Therefore, if data transmission error exceeds the allowable range due to the change of surrounding environment or normal multimedia data communication is difficult due to load increase, it is necessary to develop a technology to protect the user by automatically blocking the occupied call. There is.

Hereinafter, a communication blocking method of a mobile terminal according to the prior art will be described with reference to the accompanying drawings.

1 is a functional configuration diagram of a general mobile communication system, and FIG. 2 is a flowchart of a communication blocking method of a mobile terminal according to the prior art.

Referring to the attached mobile communication system with reference to Figure 1, the mobile terminal 10 is free to move in the service area formed by the base station (RAN) 20, the wireless communication with the desired counterpart anytime and anywhere to immediately talk.

Since the service area formed by the base station 20 is limited, a plurality of base stations 20 are continuously installed at regular intervals to form a nationwide mobile communication service area, and the plurality of base stations 20 are mobile switching stations 30. And the mobile switching center 30 records and stores subscription information of the mobile terminal 10 and registers a location to provide a mobile communication service through the corresponding base station 20.

When the other party to which the portable terminal 10 requests a connection is registered to subscribe to another communication system, the mobile switching station 30 controls the public network 40 to connect to the corresponding communication network, thereby communicating wirelessly with the other parties of all communication networks. .

The mobile terminal 10 establishes a call CALL, which is a communication path by monitoring and controlling the mobile switching center 30, and transmits and receives a multimedia signal with the other party through the set call. In the occupied state, the sender is charged according to the beneficiary principle.

When the call, which is the communication path, is blocked, when the call disconnect request signal (DISCONNECT) signal is received from the other party's mobile terminal 10 or the mobile switching center 30, the communication end control command is directly input by the calling party's mobile terminal. There is a case.

In the mobile communication system, when a call is occupied, a transmission error occurs in the data due to a change in the surrounding environment, and in order to overcome the error, the repetitive transmission of the data is required or the load of the mobile terminal increases. There is a problem in that the communication cost is continuously charged even though the actual communication cannot be progressed due to the delay of communication data processing.

Hereinafter, a communication blocking method of a portable terminal according to the prior art will be described with reference to FIG. 2.

When communicating with the other party with a mobile terminal for mobile communication (S10), input the designated unique phone number information of the other party and request a call connection (S20), the mobile switching station receiving the call connection request of the mobile terminal by the switching process A call, which is a communication path, is set (S30), and communication starts at the same time as charging of the counterpart connected to the set call (S40).

The mobile terminal determines whether there is a call release request (DISCONNECT) of the other party or the mobile switching station in the state of communicating with the other party connected to the call (S50), and if there is a call release request in the determination (S50), release the connected call. At the same time as the charging and communication ends (S70), if there is no call release request in the determination (S50), it is determined whether the communication is completed (S60), if the communication is not completed in the determination (S60) the fourth step The communication continues by returning to S40, and when the communication is completed in the determination S60, charging and communication are terminated at the same time as the release of the connected call (S70).

According to the prior art of the above-described configuration, when a call connection with the other party is established, the call release request by the other party or the mobile switching center can be performed even in a situation where normal communication cannot be performed due to a change in the surrounding wireless environment or an increase in load of the mobile terminal. Or before the request for termination of communication by the caller's portable terminal is entered, the connected call is maintained and billing continues.

According to the present invention, when the wireless terminal changes or the load increases and the normal communication cannot be carried out while the mobile terminal is connected to the other party and the charging is in progress, the communication quality of the mobile terminal is automatically released so as not to be charged. It is to provide a protective device and method.

In order to achieve the above object, the present invention provides a call connection setting with a counterpart designated by a mobile terminal controller through a wireless unit, and downloads a reference image and a difference image signal received from the wireless unit and transmitted by the counterpart. Input through the unit, detects a transmission error by applying to the error detection unit, and if the accumulated transmission error value exceeds the reference value, the timer unit is driven and the transmission of the reference video signal is requested, and the timer unit completes a predetermined count. If the reference video signal is not received until then, the transmission is repeatedly requested. If the number of transmission requests exceeds the reference value, the call connection is released. When the video signal to be transmitted from the input / output unit is input in the frame unit, the compression is performed. Monitor the unit to check if it is in compression. If it is in progress, delete the input frame. When the number of consecutively erased frames exceeds the reference value, the call connection release request is requested. If the inability to receive the reference video signal or the secondary video signal in the call connected state continues for the time set in the timer unit, the call connection release request is released. It is characterized by consisting of a configuration.

In addition, the present invention has been made in order to achieve the above object, wireless connection with a mobile communication base station to establish or release a call and wireless transmission or wireless reception of a multimedia signal; A control unit for connecting to the wireless unit, requesting a call connection, and requesting a call connection release when the video signal is not compressed or an error is accumulated in the received video signal or is not received for a predetermined time; A download unit which connects to the control unit and downloads and inputs a video signal which is classified into a reference video signal and a difference video signal from a wireless unit, and applied to each other; A compression unit which connects to the control unit and inputs and outputs a video signal to be transmitted in units of frames; An error detection unit connected to the control unit and monitoring a wirelessly received video signal to detect a transmission error; An input / output unit connected to the control unit, inputting a multimedia signal to be transmitted to the other party, outputting the received multimedia signal, and inputting a control command and a dialing signal; A timer unit connected to the control unit, driving a timer under the corresponding control, outputting a driven count value, stopping and initializing driving; And a memory unit for accessing the controller and recording and outputting the operating program and data to the allocated area by the control.

In addition, the present invention has been made to achieve the above object, if it is determined that the communication by the control unit of the mobile terminal call control requesting a call connection to the connected base station to control the radio unit and set the transmission path of the multimedia signal Process; The control unit of the process is to monitor the input and output unit for inputting the frame unit when the video signal to be transmitted to the other party; The control unit may include a compression process of determining whether the compression unit is currently performing compression or waiting, and compressing an input frame video signal and performing wireless transmission when the compression unit is in standby; If the control unit determines that the compression unit is in the process of compressing, the input unit deletes the input frame video signal and releases the call connection when the cumulative number of deleted frames exceeds the set reference value.

In addition, the present invention has been made in order to achieve the above object, in the case of wirelessly receiving the video signal according to the determination of the mobile terminal control unit receives a frame-by-frame video signal, detects and demodulates the error, the reference that the detected error is set Receiving process to determine whether exceeds; Requesting the other party to transmit the reference video signal, driving a timer, and determining whether the reference video signal is received when the cumulative error of the received signal exceeds the set reference; When the reference video signal is not received in the request process, the timer process stops the timer and requests automatic disconnection when the timer count value exceeds the set reference value and the reference video request number exceeds the set reference value. Characterized in that made.

In addition, the present invention devised to achieve the above object, if it is determined that the communication by the control unit of the mobile terminal, control the radio unit to call the base station connected to the call connection and set the transmission path of the multimedia signal and the video signal A setting process of determining whether it is received; A video process of inputting a reference video signal and a difference video signal when the video signal is received and driving the timer unit when the video signal is not received; If the timer value of the timer unit driven in the above process is set to the predetermined reference value or more characterized in that the stop process of stopping the timer driving and automatically disconnects the call.

Hereinafter, the present invention will be described with reference to the accompanying drawings, a communication quality protection device and method of a mobile terminal.

3 is a functional configuration diagram of a communication quality protection device of a mobile terminal according to the present invention, and FIG. 4 is a flowchart illustrating a method for protecting transmission video signal communication quality of a mobile terminal according to the present invention. 5 is a flowchart illustrating a method for protecting received video signal communication quality of a portable terminal according to the present invention, and FIG. 6 is a flowchart illustrating a method for protecting communication quality according to a surrounding environment of a portable terminal according to the present invention.

Referring to FIG. 3, the communication quality protection apparatus of the mobile terminal according to the present invention will be described. The call connection setting with the other party designated by the mobile terminal controller 110 for mobile communication is performed through the wireless unit 100. FIG. Requests to the base station, inputs the reference image and the difference image signal received from the wireless unit 100 transmitted by the other party through the download unit 170, and applied to the error detector 150 to detect a transmission error, the detection If the cumulative transmission error value exceeds the corresponding reference value, the timer 130 is driven and requests transmission of the reference video signal, and if the reference video signal is not received until the timer 130 completes a predetermined count, it repeats. Request for transmission, if the number of transmission requests exceeds the reference value, the call connection is released, and the video signal to be transmitted from the input / output unit 140 in the call connection state is input in units of frames. The surface compression unit 160 is monitored to check whether compression is in progress. If compression is in progress, the input frame is deleted, and if the number or number of consecutively deleted frames exceeds the corresponding reference value, the call is requested to be disconnected. In this state, if the inability to receive the reference video or the difference video signal continues for the time set in the timer unit 130, the call connection is released.

Referring to the configuration of the present invention in detail, the wireless unit 100 for wirelessly connecting to the mobile communication base station to set or release the call (CALL) and to wirelessly transmit or receive the multimedia signal,

A frame to be transmitted from the input / output unit 140 is connected to the wireless unit 100 and requests a call connection, and requests the release of the call connection when the video signal is not compressed or an error is accumulated in the received video signal or is not received for a predetermined time. When the unit video signal is input, the compression unit 160 monitors and compresses the video signal of the input frame when the current frame unit video signal is being compressed. If exceeded, the wireless connection 100 is controlled to release the call connection, and when the video signal is received from the wireless unit 100, the error detection unit 150 is applied to detect a transmission error. If the transmission error is detected, the cumulative error value is calculated to determine whether it exceeds the set range, and if it exceeds the set range. In this case, the reference video signal is transmitted for the time set in the timer unit 130, and when the number of requests exceeds the set number of times, the wireless unit 100 is controlled to request the release of the connected call, and the video signal transmitted by the other party. Is not input for a set timer time, the control unit 110 to control the radio unit 100 to request the release of the connected call (CALL),

A memory unit 120 connected to the control unit 110 and recording and outputting an operating program and data to an allocated area under a corresponding control;

A timer unit 130 connected to the control unit 110 and driving a timer under the corresponding control, outputting a driven count value, stopping and initializing driving;

An input / output unit 140 connected to the controller 110, inputting a multimedia signal to be transmitted to the other party, outputting the received multimedia signal, and inputting a control command and a dialing signal;

An error detection unit 150 connected to the control unit 110 and monitoring a wirelessly received video signal to detect a transmission error;

The video signal to be transmitted is input to the control unit 110 and is compressed and output in units of frames. The multimedia video signal to be transmitted from the input / output unit 140 under the control of the control unit 110 is transmitted in units of frames. Compression unit 160 for outputting a compressed multimedia video signal by coding according to the input order,

It is connected to the control unit 110 and downloads and inputs a video signal which is classified into a reference video signal and a difference video signal from the wireless 100 unit and applied respectively, from the wireless unit 100 under the control of the control unit 110. It is a configuration that includes a download unit 170 that detects the reference video signal or the difference video signal because it is received by the wireless signal received from the error detection unit 150 or the multimedia video signal by the difference image.

Hereinafter, by the configuration as described above, a communication quality protection device of a mobile terminal of the present invention will be described in detail with reference to the accompanying drawings.

Since the mobile communication portable terminal is manufactured in a small size and light weight for mobility and portability, there is a limit in the functional part to be configured, and in particular, there is a limit in processing capacity and additional functions are added continuously.

The third generation (3GPP) portable terminal communicates by a digital multimedia method including a video signal, an audio signal, and a text signal. The video signal has a large amount of data, and a processing capability of a corresponding functional unit that digitally processes and compresses the video signal. There is a limit to the communication cost due to the configuration characteristics of the mobile communication system, the amount of data that can be transmitted through one channel is limited, and because of the wireless communication method, transmission error in the data transmitted by changes in the surrounding wireless environment May be generated and communication may be impossible.

As described above, even if the communication quality is deteriorated due to various reasons and the communication progress is impossible, if the call connection state is maintained, the call connection is automatically interrupted so that charging due to channel occupancy is continued and it does not cause a burden on the user. It is the technique of the present invention.

When the device configuration of the present invention as described above in detail, the control unit 110 of the portable terminal, when the operating power is supplied, by controlling the activation of the memory unit 120 to read the operating program and a plurality of application programs and set the data to read In the operation standby state, when the multimedia communication with the other party specified by the control command applied from the input / output unit 140 in the operation standby state as described above, and activates each function unit.

For example, when a multimedia video signal is transmitted to a designated counterpart, the controller 10 monitors the compression unit 160 when an image signal of a frame unit is applied from the input / output unit 140. Check whether the current compression state or standby state.

The controller 110 deletes the video signal of the frame unit currently input from the input / output unit 140 when the compression unit 160 is compressing the video signal of the frame unit input in the previous step. Record the number of times.

The control unit 110 analyzes the deleted frame FRAME number, and when the number of consecutive deletions exceeds a predetermined reference value N, that is, the function unit including the compression unit 160. If there is an error in the communication, it cannot be compressed or transmitted, or if a load is added to the corresponding functional part and a video signal for normal communication cannot be transmitted, the channel can not be communicated but the call is connected. Since the occupancy continues and charging proceeds, the wireless unit 100 is controlled to disconnect or call the call connection to the base station RAN and the MSC, thereby releasing the call, thereby stopping the charging.

As another example, when the wireless unit 100, which is monitored by the controller 110, receives the multimedia signal transmitted by the other party through the base station RAN, the received multimedia signal is applied to the error detection unit 150. If the transmission error is detected, the error detection information is accumulated and stored, and the received multimedia signal is input to the download unit 170.

The bandwidth allocated to each channel by the mobile communication system, or the size of data that each channel can transmit at a time is constantly limited.

In the multimedia communication method, a process of digitally coding an image signal having a large amount of data or a large data size and performing transmission in a compressed state is performed.

In addition, the video signal is a constant portion of the video data is not changed in the unit of the frame is changed, the method of detecting the corresponding data value is used, and the video signal as the difference image signal, the entire image of the frame The video signal based on the data value is called a reference video signal.

In the multimedia communication method, since the reference video signal is transmitted for the initial frame and the next video signal is transmitted from the next frame, a method of reducing the amount of data to be transmitted while sufficiently representing the video is used.

If an error occurs in the transmitted difference video signal, distortion occurs in the video signal of the corresponding frame, and affects the video signals consecutively in the following order. This is a method of setting a non-recognized reference and requesting the other party to transmit a reference video signal.

Therefore, when the error detection unit 150 detects and accumulates the transmission error value exceeding a predetermined reference value, the controller 110 requests the counterpart of the video signal to transmit the reference video signal. The timer 130 is controlled to count the predetermined time.

When the timer unit 130 under the control of the control unit 110 receives the reference video signal wirelessly before counting the predetermined time, the download unit 170 is controlled to input the timer unit 130. If the reference video signal is not received to complete the predetermined time set by the mobile station, the request for transmission of the reference video signal is repeatedly requested, and the number of request for the reference video signal is accumulated and stored.

The controller 110 determines whether the cumulative value of the reference video signal request count is equal to or greater than a predetermined number of requests (NR), and fails to wirelessly receive the reference video signal despite the request. If the communication using the multimedia video signal is not possible, the operation of the timer unit 130 is stopped and the wireless unit 100 is controlled in order to stop the charging and is currently connected to the base station RAN and the mobile switching center MSC. Request the release of an established call and terminate the communication.

In another embodiment, when the controller 110 wirelessly receives the multimedia video signal transmitted from the other party through the wireless unit 100, the controller 110 wirelessly receives the reference video signal and the difference video signal and downloads the received video 170. To activate and enter.

The controller 110, in the state of receiving and inputting the multimedia video signal as described above, when the incapable state of the video signal occurs, that is, due to a change in the surrounding wireless environment, for example, tunnel, underground When moving to a location such as a space or a shadowed area and the video signal reception is impossible, the timer 130 is controlled to count the time, and the predetermined time value (TO: TIME OUT) is set. Determine if it exceeds.

If it is impossible to receive the multimedia video signal until the time value counted by the timer 130 exceeds the predetermined reference value TO, since normal communication is impossible, charging of expensive multimedia mobile communication costs is stopped. To stop the counting of the timer unit, and to cancel the call connection set to the mobile switching station via the base station, communication is interrupted.

Accordingly, the present invention of the above configuration, when the mobile terminal is unable to normal multimedia communication due to the limitation of the processing capacity of the mobile terminal in the transmission and reception of the multimedia video signal, or changes in the surrounding wireless environment, the communication cost of In order to reduce the burden, there is an advantage of improving the reliability by automatically releasing the call connection.

Hereinafter, a method of protecting transmission video signal communication quality of a portable terminal according to the present invention will be described with reference to FIG.

If it is determined that the communication by the control unit 110 of the mobile terminal for mobile communication is to control the radio unit 100 to request a call connection to the connected base station (RAN) and to set the transmission path of the multimedia signal, the control unit 110 Analyzing the command signal applied from the input / output unit 140 to determine whether the command signal for multimedia communication with the counterpart is input (S100); When it is determined in step S100 that the multimedia communication command signal is input, the call connection process includes controlling the wireless unit 100 to request a call connection with a designated counterpart and setting a multimedia transmission path (S110);

The control unit 110 of the call connection process monitors the input / output unit 140 and inputs them in units of frames when an image signal to be transmitted to the counterpart is input, and from the input / output unit 140 being monitored by the control unit 110. Determining whether a multimedia video signal to be transmitted to the counterpart is input (S120); If it is determined that the video signal is input from the input and output unit 140 by the control unit 110 of the process (S120) and the frame process comprising the step of inputting in the set frame unit (S130),

The control unit 110 of the frame process determines whether the compression unit 160 is currently in compression or waiting, and if it is in the air, compresses the input frame video signal and transmits the radio by the control unit 110. Determining whether the frame image signal, which has been applied first, is being compressed (S140); If it is determined by the controller 110 of the process (S140) that the compression unit 160 is in the standby state, the video signal of the frame applied from the input / output unit 140 is applied to the compression unit 160 to compress, Compression process consisting of the step of applying a compressed video signal to the wireless unit 100 to the specified counterpart (S150),

If the control unit 110 determines that the compression unit 160 is in the process of compressing and deletes the input frame video signal, and releases the call when the number of cumulatively deleted frames exceeds the set reference value, the control unit 110 determines that If it is determined that the compression unit 160 is in the state of being compressed, the step of deleting the video signal of the input frame for compression (S160); Determining whether the frame deleted in step S160 has been continuously deleted and whether the number of consecutive deletions exceeds the set number of times (S170); If the number of consecutive deletions exceeds the number set in step S170, the control step of the wireless unit 100 to release the connected call is composed of a deletion process consisting of (S180).

Hereinafter, a method of protecting transmission video signal communication quality of a mobile terminal according to the present invention having the above configuration will be described in detail with reference to the accompanying drawings.

When a command signal to communicate with the other party (MULTIMEDIA) is applied from the input / output unit 140 monitored by the controller 110 of the mobile communication portable terminal (S100), the controller 110 is a wireless unit 100. Activates and controls a wireless connection with the base station RAN, and requests a call connection for establishing a multimedia communication path to the MSC (S110).

When the video signal to be transmitted to the counterpart is input from the monitoring input / output unit 140 (S120), the controller 110 inputs the video signal in a predetermined frame (FRAME) unit (S130). The monitoring unit 160 monitors whether it is currently in a standby state or is compressing an image signal of a frame unit input in the previous step (S140).

If the compression unit 160 is in the compression standby state in the determination (S140), the frame unit video signal input from the input / output unit 140 is applied to the compression unit 160 to compress the compressed frame unit video signal. Applied to the unit 100, wireless transmission to the designated counterpart (S150), and the feedback to the frame process (S130) (FEEDBACK) to repeat the compression and transmission.

If the control unit 110 determines that the compression unit is in the process of compressing the frame video signal applied in the previous step, the control unit 110 deletes the frame FRAME of the video signal currently input for compression. , Records the number of consecutive deletions or numbers (S160).

The controller 110 determines whether or not the number of consecutive deletions that are cumulatively managed in step S160 is greater than a predetermined reference value N (S170), and the frames continuously deleted in the determination (S170). If the number or the number of times is smaller than the predetermined reference value (N), the process returns to the frame process (S130) and repeats, and the number of consecutively deleted frames in the determination (S170) is greater than the predetermined reference value (N). In this case, the activated wireless unit 100 is controlled to release the call connection established between the base station RAN and the mobile switching center MSC and terminate the communication (S180). Therefore, the charging by the mobile communication multimedia channel is stopped.

If the number of times or the number of consecutive frame-deleted video signals is large, the video signal cannot be transmitted to the other party. Therefore, since normal multimedia communication is not in progress, automatic call connection is made to reduce the expensive communication cost burden. There is an advantage to release.

Hereinafter, with reference to the accompanying FIG. 5, a method of protecting received video signal communication quality of a portable terminal according to the present invention will be described.

In the case of wirelessly receiving the video signal by the determination of the mobile terminal controller 110 for mobile communication, the controller 110 receives a frame-by-frame video signal, detects and demodulates an error, and determines whether the detected error exceeds a set criterion. Determining whether a multimedia video signal transmitted from the other party is received from the wireless unit 100 by using the step S200; Inputting the received video signal and applying the received video signal to the error detection unit 150 to detect a transmission error and demodulating the received video signal (S210); Receiving process consisting of the step (S220) of determining whether the accumulated value of the transmission error detected in the step (S210) exceeds a predetermined reference value (EA: ERROR OF ACCUMULATED),

If the cumulative error of the signal received in the receiving process exceeds the set reference, requesting the other party to transmit the reference video signal, driving the timer unit, and determining whether the reference video signal is received. If the accumulated value of the transmission error exceeds the corresponding reference value, controlling the wireless unit 100 to request the other party to transmit the reference video signal (S230); Counting time by driving the timer unit 130 by the controller 110 of the process S230 (S240); Determining whether the reference video signal requested to be transmitted to the other party is wirelessly received (S250); A request process consisting of stopping the driving of the timer unit 130 and returning to the receiving step S200 when receiving the reference video signal requested to be transmitted in the step S250;

When the reference video signal is not received in the request process, if the timer count value exceeds the set reference value and the reference video request number exceeds the set reference value, the timer unit stops driving and requests to release the call. Determining whether the count value of the timer unit 130 exceeds the set reference value Tout when the reference video signal requested for transmission in the request process is not received (S250); Determining whether the reference image request number exceeds a corresponding reference value (NR: NUMBER OF REQUEST) when the count value of the timer unit 130 exceeds the corresponding reference value Tout in step S270 (S280); When the reference video request number exceeds the corresponding reference value NR in step S280, the timer process includes stopping the count of the timer unit 130 and releasing the call connection (S290).

Hereinafter, the present invention having the configuration described above will be described in detail with reference to the accompanying drawings, a method for protecting received video signal communication quality of a mobile terminal.

The control unit 110 of the mobile terminal (MS) is in the state of monitoring the operation state of each functional unit, when it is confirmed that the multimedia video signal of the other party through the wireless unit 100 (S200), the wireless unit ( The multimedia image signal wirelessly received in units of frames from FRAME 100 is applied to the error detection unit 150 to detect and record a transmission error, and to the download unit 170 to input and demodulate the input and demodulation. 140 is applied to the output (S210).

The control unit 110 of the process (S210), and determines whether the cumulative recorded transmission error value of the detected multimedia video signal is greater than the predetermined reference value (EA) (S220), the determination (S220) If the cumulative transmission error value of the multimedia video signal is smaller than the reference value (EA) in step S200, the video signal reception is repeated and the accumulated transmission error value of the multimedia video signal is determined. If the value is larger than the reference value EA, a request is made to transmit the reference video signal to the other party who has transmitted the multimedia video signal through the wireless unit 100 and manages the requested number of information (S230).

The controller 110 of the process S230 drives the timer 130 to count the set reference time Tout (S240), and monitors the wireless unit 100 to monitor the reference video signal of the multimedia video signal. It is determined whether the radio reception (S250).

If it is determined in step S250 that the reference video signal is received, the controller 110 stops driving the timer 130 and returns to the receiving step S200 (S260), and the reference video signal Repeated reception of the multimedia signal by the difference video signal, and if the reference video signal is not received in the determination (S250), contrast determination whether the time counted by the timer unit 130 exceeds a predetermined reference value (Tout) (S270).

If the counting time of the timer unit 130 does not exceed the set reference time value Tout in the step S270, it is returned to the requesting step S250 to confirm receipt of the reference image again, and the step ( If the counting time of the timer unit 130 exceeds the set reference time Tout in S270, the reference video request is automatically terminated, and the predetermined reference value NR is set by confirming the number of consecutive reference video management requests. It is determined whether the excess exceeds (S280).

When the reference image request count does not exceed the predetermined reference value NR determined in the step S280, the request is sent back to the request step S230 to request transmission of the reference image again, and the determination S280. If the number of times of requesting the reference video exceeds the predetermined reference value NR, the wireless unit 100 is controlled to request the release of the call connection state set as the multimedia communication path to the base station RAN and the MSC. The communication is terminated so that charging is stopped.

According to the present invention having the above-described configuration, when receiving a video signal in a multimedia communication, since a reference video signal is initially received and a difference video signal is received to reduce the amount of data, the transmission error of the difference video signal is greater than or equal to a predetermined value. In a cumulative state, abnormal video signals are output and multimedia communication is impossible.

That is, if the accumulated transmission error of the received multimedia video signal is equal to or greater than a predetermined reference value, request transmission of the corresponding reference video signal, and if the reference video signal is received, initialize the accumulated transmission error and then receive it. The process of accumulating the transmission error value is repeated.

In this case, when the number of requests for transmission of the reference video signal is recorded and managed as a history, and the continuous value of the managed number of requests exceeds a predetermined reference value, the video signal is in an abnormal state and thus communication is not possible. In order to automatically stop the charging of expensive communication charges, the call connection is automatically released.

Therefore, the call connection is automatically released when the multimedia video signal is not normally received and displayed, thereby automatically stopping the charging state in which the communication cost is not paid.

Hereinafter, with reference to the accompanying Figure 6, the communication quality protection method according to the surrounding environment of the mobile terminal according to the present invention will be described.

If it is determined by the controller 110 of the mobile terminal for mobile communication to perform multimedia communication using a video signal, the wireless unit 100 is controlled to request a call connection to the connected base station RAN and to set a transmission path of the multimedia signal. By determining whether a signal is received, the controller 110 analyzes a command signal applied from the input / output unit 140 to determine whether a command signal for multimedia communication operation including an image signal with the counterpart is input (S300). ); If it is determined in step (S300) that the command signal input for operating the multimedia communication, controlling the wireless unit 100 to request a call connection with the designated counterpart (S310) to set a multimedia (MULTIMEDIA) transmission path; A setting step (S320) of determining whether the video signal of the other party is wirelessly received through the transmission path set in the call connection (S310);

When the video signal is received and judged in the setting process, the reference video signal and the difference video signal are inputted, and when the video signal is not received, the timer 130 is driven. Receiving and inputting the reference video signal and the difference video signal without error when receiving the signal (S330); Determining whether the reference image received in the step S330 or the difference image signal is in a state in which reception is not received wirelessly (S340); If it is determined that the multimedia image signal is incapable of receiving the multimedia video signal in the step (S340), the video process comprising a step (S350) of starting the predetermined time by driving the timer unit 130,

If the count value of the timer unit 130 driven in the imaging process is greater than or equal to the predetermined reference value, the timer stops driving and releases the call connection. The predetermined reference value is set to the time value counted by the driven timer unit 130. Determining whether it exceeds (TO: Tout) (S360); When the time count value of the timer unit 130 exceeds the reference value in the step (S360), the stop of the timer unit 130 and automatically disconnects the call connection step (S370) consists of an interruption process. .

Hereinafter, the present invention having the above-described configuration will be described in detail with reference to the accompanying drawings.

When a command signal for a multimedia communication including an image signal is applied to the mobile communication portable terminal from the input / output unit 140 to the control unit 110 (S300), the control unit 110 controls the wireless unit 100. Since it requests a call connection with the specified counterpart, it establishes a multimedia communication path including a video signal (S310).

The mobile terminal controller 110 of the step S310 determines whether the multimedia image signal transmitted by the other party through the wireless unit 100 is received wirelessly (S320), and the image transmitted by the other party in the determination (S320). When the signal is received, the reference video signal and the difference video signal constituting the video signal is wirelessly received from the wireless unit 100 in the corresponding order and input to the download unit 170 (S330).

The controller 110 of step S330 determines whether the video signal is normally received or is incapable of receiving due to a change in the surrounding wireless environment (S340). If it is in the receiving state, the feedback is repeated (FEEDBACK) in the process (S330) and repeats the reception of the video signal, so that the multimedia communication continues, and judged in the process (S340), the video signal is normally received by the change in the surrounding wireless environment, etc. If not, the timer 130 is controlled to drive to count the time value (S350).

The control unit 110 of the process (S350) determines whether the time value counted by the timer unit 130 exceeds a predetermined reference value TO (S360), and the timer unit 130 in the process (S360) If the counted time value is smaller than the set reference value TO, the process returns to the image process S340 and repeats whether or not the image signal is normally received. The timer unit 130 counts the process at step S360. If the time value is greater than the set reference value TO, the timer unit stops counting, and controls the wireless unit 100 to release the automatically set call connection state (S370).

According to the present invention, the mobile terminal does not normally receive a video signal for a certain period of time due to a change in the surrounding wireless environment. Disconnect by disconnection and stop charging.

Accordingly, the present invention has the advantage of preventing the charge of expensive communication charges, since the call connection is automatically released in a situation where multimedia communication using a video signal is impossible.

According to the present invention having the above configuration, in the state of multimedia communication with the mobile terminal, due to an increase in the load of each functional unit of the mobile terminal, if the video signal cannot be normally transmitted or there are many errors in the received video signal, normal multimedia communication is performed. Since it does not proceed, there is an industrial use effect to increase the reliability of the multimedia mobile communication system by blocking the call connection so that expensive communication fees are not charged.

In addition, when the reception of the multimedia video signal for a certain period of time due to a change in the surrounding wireless environment where the portable terminal is located, there is a convenient effect in that the call connection is automatically blocked so that the communication fee is not charged.

Claims (17)

Requesting to establish a call connection with the other party specified by the mobile terminal controller through the wireless unit; Receiving a reference image and a difference image signal received from the wireless unit and transmitted by the other party through a download unit, and applying the error detection unit to detect a transmission error; Driving a timer and requesting transmission of a reference video signal when the detected transmission error cumulative value exceeds a corresponding reference value; Repeating transmission request if the reference video signal is not received until the timer unit completes a predetermined count; Releasing a call connection when the number of transmission requests exceeds a corresponding reference value; When the video signal to be transmitted from the input / output unit is input in units of frames in the call connection state, checking whether the compression unit is in progress by monitoring the compression unit; Deleting the input frame if the compression is in progress; Requesting for disconnection of a call when the number of consecutively deleted frames exceeds a corresponding reference value; And disconnecting the call connection if the reception state of the reference image or the difference image signal continues for the time set in the timer in the connected state. A wireless unit for establishing or releasing a call by wirelessly connecting to a mobile communication base station and wirelessly transmitting or receiving a multimedia signal; A controller for connecting to the wireless unit, requesting a call connection, and requesting release of a call connection when the video signal is not compressed or an error is accumulated in the received video signal or is not received for a predetermined time; A download unit which accesses the control unit and downloads and inputs a video signal which is classified into a reference video signal and a difference video signal from a wireless unit, and applied to each other; A compression unit which connects to the control unit and inputs and outputs a video signal to be transmitted in units of frames; An error detection unit connected to the control unit and monitoring a video signal received wirelessly to detect a transmission error; An input / output unit connected to the control unit, inputting a multimedia signal to be transmitted to the other party, outputting the received multimedia signal, and inputting a control command and a dialing signal; A timer unit connected to the control unit, driving a timer under the control, outputting a driven count value, stopping and initializing driving; And a memory unit connected to the control unit and configured to record and output the operation program and the data in the allocated area by the control. The method of claim 2, wherein the download unit, Communication quality protection of the mobile terminal, characterized in that the configuration is configured to detect the reference video signal or the difference video signal by receiving the multimedia video signal wirelessly received from the wireless unit under the control of the control unit and the error detection unit input and download processing Device. The method of claim 2, wherein the control unit, When the frame unit video signal to be transmitted from the input / output unit is input, the compression unit monitors the current frame unit video signal, and if the frame unit video signal is being compressed, the input frame is deleted and the number of consecutive deletions is accumulated. If exceeded, the wireless unit is controlled to release the call connection, and when a video signal is received from the wireless unit, it is applied to the error detection unit to detect a transmission error. The controller calculates an error value and determines whether the set range is exceeded. When the set range is exceeded, the reference video signal is transmitted for a time set in the timer unit. Timer requesting call release and set video signal transmitted from other party Communication quality protection device of which comprises a structure requesting the de-allocation of the arc does not input to the radio control unit for connection between. If it is determined that the communication by the controller of the mobile terminal to communicate with the call connection process for requesting a call connection to the connected base station to control the wireless unit and set the transmission path of the multimedia signal, The control unit of the process is to monitor the input and output unit for inputting the frame process when the input image signal to be transmitted to the other party; The control unit of the process is determined by the compression unit whether the compression is currently in progress or waiting, and if the standby compression process for compressing the frame video signal to be input and wireless transmission; The controller determines that the control unit of the process deletes the input frame video signal when the compression unit is in progress, and releases the call connection when the number of cumulatively deleted frames exceeds a set reference value. Communication quality protection method. The method of claim 5, wherein the call connection process, Analyzing the command signal applied from the input / output unit by the portable terminal controller to determine whether a command signal for multimedia communication with the counterpart is input; If it is determined in the process that the multimedia communication command signal input, the communication quality protection method of a mobile terminal, characterized in that the control step of the wireless unit comprising the step of requesting a call connection with the designated party and setting the multimedia transmission path. The method of claim 5, wherein the frame process, Determining whether a multimedia video signal to be transmitted to the counterpart is input by the control unit of the call connection process; If it is determined that the video signal is input from the input and output unit by the control unit of the process, the communication quality protection method of the mobile terminal, characterized in that the process consisting of inputting the frame unit. The method of claim 5, wherein the compression process, Determining whether the compression unit is first compressing the frame image signal applied by the controller of the frame process; If it is determined by the control unit of the process of the compression unit is in the standby state, the process of applying the video signal of the frame applied from the input and output unit to the compression unit to compress, and applying the compressed video signal to the radio unit to transmit to the designated counterpart Communication quality protection method of a mobile terminal, characterized in that consisting of. The method of claim 5, wherein the deleting process, If it is determined by the control unit of the compression process that the compression unit is in compression, deleting the video signal of the input frame for compression; Determining whether the frames deleted in the process are consecutively deleted, and whether the number of consecutive deletions exceeds a set number of times; And a method of releasing the connected call by controlling the wireless unit if the number of consecutive deletions exceeds the set number of times. In the case of wirelessly receiving the video signal based on the determination of the control unit of the portable terminal, the reception process of receiving the video signal in units of frames, detecting and demodulating an error, and determining whether the detected error exceeds a set criterion; A request process for requesting the other party to transmit the reference video signal, driving a timer, and determining whether the reference video signal is received when the cumulative error of the received signal exceeds the set reference; When the reference video signal is not received in the request process, the timer process stops the timer and requests automatic disconnection when the timer count value exceeds the set reference value and the reference video request number exceeds the set reference value. Communication quality protection method of a mobile terminal, characterized in that made. The method of claim 10, wherein the receiving process, Determining, by the controller of the portable terminal, whether the multimedia video signal transmitted from the other party is received from the wireless unit; When the video signal is received in the process, inputting the received video signal and applying it to an error detection unit to detect a transmission error, and demodulating the received video signal; And determining whether the accumulated value of the transmission error detected in the process exceeds a predetermined reference value. The method of claim 10, wherein the request process, Determining the transmission error when the accumulated value of the transmission error exceeds a corresponding reference value, requesting the other party to transmit the reference video signal by controlling the radio unit; Counting time by driving the timer by the controller of the process; Determining whether the reference video signal requested to be transmitted to the other party is wirelessly received; And receiving the reference video signal requested to be transmitted in the process, stopping the driving of the timer and returning the signal to the receiving process. The method of claim 10, wherein the timer process, Determining whether the count value of the timer unit exceeds a corresponding reference value when the reference video signal requested for transmission in the request process is not received; Determining whether the reference video request number exceeds the reference value when the count value of the timer unit exceeds the reference value; And stopping the counting of the timer unit and releasing the call connection when the reference video request number exceeds the reference value. If it is determined that the communication by the control unit of the mobile terminal to communicate by setting a request for call connection to the connected base station to control the wireless unit, setting the transmission path of the multimedia signal and determines whether the video signal is received; A video process of inputting a reference video signal and a difference video signal when the video signal is received and driving the timer unit when the video signal is not received; And stopping the timer driving and automatically releasing the call connection when the count value of the timer unit driven in the process is equal to or greater than a predetermined reference value. The method of claim 14, wherein the setting process, Analyzing the command signal applied from the input / output unit by the portable terminal controller to determine whether a command signal for multimedia communication operation with the counterpart is input; If it is determined that the multimedia communication command signal is input in the above process, requesting a call connection with a specified counterpart by controlling the wireless unit and setting a multimedia transmission path; And determining whether the video signal of the other party is wirelessly received through the transmission path set in the call connection. The method of claim 14, wherein the imaging process, Receiving and inputting a reference video signal and a difference video signal without error when receiving a video signal from a counterpart in the setting process; Determining whether the received reference image or the difference image signal is in a state incapable of receiving radio signals; And if the video signal is in an unreceivable state, driving the timer to start counting the time. The method of claim 14, wherein the interruption process, Determining whether a time value counted by a timer driven in the imaging process exceeds a corresponding reference value; And stopping the counting of the timer and automatically releasing the call connection when the timer counting time exceeds the predetermined reference value.

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