KR20050090724A - Radio sensitivity diagnosis method for picture terminal - Google Patents

Abstract

The present invention relates to a method for diagnosing wireless sensitivity of a video terminal. In particular, the wireless sensitivity is measured during a video call and then displayed on the user screen. The purpose of the present invention is to determine whether or not due to a radio wave defect of a wireless network. According to the present invention, a CRC error of a frame during a video call is checked to determine whether video recognition is impossible due to occurrence of a plurality of CRC errors, and if the video recognition is not possible, the average value of the received electric field level for a predetermined time is determined. Calculating and determining whether the average value is greater than or equal to a certain level, and if the average value is less than or equal to a certain level, indicating that the current location is a poor radio wave area and storing GPS location information of the current location to be transmitted to the base station when the radio wave is moved to a good radio area; And determining that the terminal reception sensitivity is poor when the average value is above a certain level, and displaying on the terminal screen and simultaneously notifying the AS center by using a short message (for example, SMS).

Description

Radio sensitivity diagnosis method of video terminal {RADIO SENSITIVITY DIAGNOSIS METHOD FOR PICTURE TERMINAL}

The present invention relates to a mobile communication terminal, and more particularly, to a method for diagnosing wireless sensitivity in an image terminal.

Code Division Multiple Access (CDMA) using Spread Spectrum Generally, Frequency Division Multiple Access (FDMA) or Time Division Multiple Access (TDMA) is used in mobile communication systems. Unlike the mobile communication system, even though the band has the same bandwidth, the radio link capacity depends on the interference included in the radio link.

In addition, since the capacity of the reverse link (the radio link from the terminal to the base station) is smaller than that of the forward link (the radio link from the base station to the terminal), the radio link capacity of the CDMA mobile communication system is determined by the capacity of the reverse link.

In actual CDMA mobile communication system, the link capacity of voice activity, background noise, and sectorization effect should be considered.

In general, when a frame error (bad frame) occurs during a wireless call, the frame is discarded, and thus, a call disconnection phenomenon occurs.

That is, when a frame error occurs continuously in the terminal, the transmission is interrupted and the reception tone is interrupted. As described above, the frame error occurs in the weak field region.

However, in the related art, when a call disconnection occurs, a user suspects that the terminal is bad and requests unnecessary repair (AS).

In particular, when a video call using a video terminal fails in the related art, it may be due to a radio wave propagation failure of the wireless network.

Accordingly, the present invention measures the radiosensitivity of the video call in order to improve the conventional problem, and then displays whether the terminal is bad or radio wave from the user screen on the user screen to determine whether the user is due to a bad terminal or wireless It is an object of the present invention to provide a method for diagnosing wireless sensitivity of a video terminal, which is invented so as to determine whether the network is defective.

The present invention is to determine the call quality by the CRC (Cyclic Redundancy Check) of the frame during the video call in order to achieve the above object, and the reception field level for a predetermined time when it is determined that the image is not recognized Computing the average value of the; and comparing the average value is greater than a specific level value of the radio wave good region; if the average value is determined to be greater than the specific level value, it is determined that the reception sensitivity of the terminal is poor and displayed on the terminal screen And transmitting an AS request message to an AS center, and if it is determined that the average value is lower than a specific level value, it determines that the radio wave is poor and displays it on the terminal screen. And storing the GPS location information of the area.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a flowchart illustrating an operation of diagnosing radio sensitivity in an embodiment of the present invention. As shown in FIG. 1, a CRC error of a received frame during a video call is checked to determine whether image recognition is impossible due to occurrence of a plurality of CRC errors. Step 1 and the second step of calculating the average value of the received electric field level for a predetermined time when it is determined that the image recognition is not possible, and if the average value is below a certain level, the current position is poor propagation Re-stage 3 of storing the GPS location information of the current position to be transmitted to the base station when the area is moved to the radio wave good area, and if the average value is above a certain level, it is determined that the terminal reception sensitivity is poor and displayed on the terminal screen and at the same time And performing a fourth step of informing using a short message (eg, SMS).

Referring to the operation and effect of the embodiment of the present invention configured as described above are as follows.

In an embodiment of the present invention, a video terminal will be described assuming a terminal equipped with a GPS (Global Positioning System) function.

By pressing a call button on the counterpart phone number inputted by the user for a video call, the corresponding phone number is transmitted from the user terminal to the base station and attempts to access the call with the counterpart terminal.

If the terminal is located between high-rise buildings in the city center or underground, communication quality is degraded. In this case, the reception electric field may be weakened and communication may be interrupted.

Accordingly, the terminal controller checks the CRC error to determine whether the received frame is in error.

Accordingly, when no CRC error occurs, the terminal controller determines that the frame is normal and proceeds with the video call normally.

If a CRC error occurs, the terminal controller discards the frame in which the error occurs, thereby interrupting the call for a predetermined time.

Therefore, if the CRC error occurs continuously enough to make it difficult for the user to recognize the video, the terminal controller determines that the video call is impossible and calculates an average value of the received electric field level for a specific time.

At this time, the terminal controller compares whether the calculated average value is greater than or equal to a specific level value. The specific level value means an appropriate reception electric field level value that can be determined as a good radio wave propagation area.

Accordingly, when the average value is determined to be equal to or greater than a specific level value, the terminal controller recognizes that the terminal reception sensitivity is poor and displays the terminal reception sensitivity on the terminal screen. Then, the terminal center transmits the terminal phone number and terminal reception sensitivity failure information to the AS center. SMS).

Therefore, the AS center checks the short message and provides management of the terminal AS.

In addition, when the average value is determined to be less than the specified level value, the terminal controller recognizes the radio wave poor region and displays it on the terminal screen and at the same time stores the GSP location information for the current location.

Then, when the user moves to the radio wave good region, the terminal controller transmits the GSP location information of the radio wave poor region to the base station so that the carrier can consider the base station network maintenance.

That is, when the CRC error of the received video is more than a predetermined level during a video call using the video terminal, if the image is lost due to the occurrence of the CRC error at an appropriate reception level or more, the present invention indicates that the terminal is defective and maintains the terminal. It transmits the AS message to the AS center. If the image is lost due to the occurrence of CRC error in the region where reception level is very bad, it indicates that the base station is poor in the radio wave poor area. The operation of storing GPS location information of a location is performed.

As described in detail above, the present invention determines whether the terminal itself or the system is defective in the terminal itself when the video call fails in the initial stage of the IMT2000 service, thereby preventing the economic loss due to unnecessary repair (AS). Since the cause of the call failure can be identified, the user's dissatisfaction with the call failure can be eliminated in advance.

In addition, the present invention has an effect of improving the overall quality of the wireless network by not attempting a network connection when the user recognizes the terminal as bad.

On the other hand, when making a video call using the IMT2000 terminal requires a measuring instrument for measuring the wireless sensitivity, the present invention, even if there is no measuring instrument for measuring the video call sensitivity, the AS manager wirelessly Sensitivity can be measured.

1 is a flowchart illustrating an operation of diagnosing wireless sensitivity in an embodiment of the present invention.

Claims (3)

Checking a CRC error of a received frame during a video call; Calculating an average value of the received electric field level for a predetermined time when it is determined that image recognition is impossible due to occurrence of a CRC error; Comparing whether the average value is equal to or greater than a specific level value in a radio wave good region; if the average value is determined to be equal to or more than a specific level value, determining that the reception sensitivity of the terminal is poor and displaying the result on a terminal screen; And if it is determined that the average value is equal to or less than a specific level value, determining that the radio wave is poor and displaying the result on the terminal screen. The method as claimed in claim 1, further comprising: transmitting an AS request message to an AS center by using a short service when determining a poor reception sensitivity of the terminal. The method of claim 1, further comprising: storing GPS location information of the location where the terminal is currently located in the radio poor area and transmitting the GPS location information to the base station when the location is moved to the radio wave good area. Wireless sensitivity diagnostic method for a video terminal, characterized in that the configuration.