KR100837251B1 - Dmb terminal for charging of paid dmb service, and charging method of dmb terminal - Google Patents

Abstract

According to the pay DMB service, the strength of the received pay DMB signal is stored at predetermined time intervals, and the stored pay DMB signal is compared with a preset reference signal strength to reflect the time when a service failure occurs in the billing process. A DMB terminal for charging a paid DMB service and a charging operation method of the DMB terminal are disclosed.

In the charging operation method of the DMB terminal for the billing processing of the pay DMB service, the signal strength of the received pay DMB signal is measured at predetermined time intervals, and each of the measured signal strengths is compared with a preset reference signal strength. Calculating a time for which the measured signal strength remains below the reference signal strength according to the comparison result, and calculating a service failure time of the pay DMB service based on the calculated time; And transmitting the calculated service failure time to a service server such that the service failure time is reflected in the usage fee according to the paid DMB service.

Paid DMB service, shading, deafness, billing, signal strength

Description

DMB terminal for billing processing of paid DMB service, and charging operation method of DMB terminal {DMB TERMINAL FOR CHARGING OF PAID DMB SERVICE, AND CHARGING METHOD OF DMB TERMINAL}

1 is a diagram illustrating a system for providing a paid DMB service according to the present invention.

2 is a flowchart illustrating a charging operation method according to an embodiment of the present invention.

3 is a diagram illustrating the strength of a paid DMB signal received by a DMB terminal while using a paid DMB service according to an embodiment of the present invention.

FIG. 4 is a diagram for describing determining an end time point of a paid DMB service by analyzing the strength of a stored paid DMB signal.
5 is a block diagram illustrating an internal configuration of a DMB terminal according to an embodiment of the present invention.
<Explanation of symbols for the main parts of the drawings>
500: DMB terminal 510: DMB signal receiving unit
520: signal strength measurement unit 530: comparison unit
540: time calculating unit 550: transmitting unit
560: memory 570: control unit
580: wireless communication unit

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The present invention stores the strength of the received paid DMB signal at predetermined time intervals according to the paid DMB service, and compares the strength of the stored paid DMB signal with a preset reference signal strength, and charges for the time when the service failure occurs. A DMB terminal for charging processing of a paid DMB service to be reflected in the processing, and a charging operation method of the DMB terminal.

Today, with the advent of the DMB service, a user can watch various broadcasts through a portable terminal. These DMB services are largely classified into paid DMB services and free DMB services. The paid DMB service is a service in which the user pays a predetermined fee according to the use of the DMB service, and provides quality content to the user in various billing methods.

While the paid DMB service is in use, the smooth service may not be provided due to the influence of the shadow area. However, the current user has to pay a predetermined fee according to the use of the service even when the paid DMB service is used in a situation where it is not smooth. Therefore, there is an urgent need for the emergence of technical ideas that compensate users for charges for times when the quality of paid DMB services is degraded.

The present invention has been made to improve the prior art as described above, an object of the present invention, the billing processing of the paid DMB service, to provide the user with a material compensation corresponding to the time when the quality of the paid DMB service is degraded To provide a DMB terminal, and a charging operation method of the DMB terminal.

An object of the present invention, by clearly determining the end time of the paid DMB service in the shaded area, it is possible to accurately calculate the charge according to the use of the service.

In order to achieve the above object and to solve the above-mentioned problems of the prior art, the charging operation method of the DMB terminal for the billing processing of the pay DMB service according to the present invention, pre-determined the signal strength of the received pay DMB signal Measuring at intervals and comparing each of the measured signal strengths with a preset reference signal strength, and calculating a time for which the measured signal strength is kept below the reference signal strength according to the comparison result; And calculating a service failure time of the paid DMB service based on the calculated time, and transmitting the calculated service failure time to a service server so that the service failure time is transmitted from the service server to the paid DMB service. It characterized in that it comprises the step of processing to be reflected in the charge.

According to an embodiment of the present invention, a billing operation method of a paid DMB service includes calculating a service providing time of a paid DMB service provided to a DMB terminal, and storing signal strength of a paid DMB signal at predetermined time intervals. Receiving one log information from the DMB terminal; comparing the signal strength with a preset reference signal strength with reference to the log information; and wherein the signal strength is less than or equal to the reference signal strength according to the comparison result. Calculating a maintenance time maintained as a service failure time, and charging the user of the DMB terminal based on the calculated service failure time.

According to another embodiment of the present invention, a DMB terminal for billing processing of a paid DMB service includes a signal strength measuring unit for measuring a signal strength of a received pay DMB signal at predetermined time intervals, and the measured signal strengths, respectively. Comparing unit for comparing a predetermined reference signal strength, and calculates the time the measured signal strength is maintained below the reference signal strength according to the comparison result, and based on the calculated time of the paid DMB service And a time calculating unit for calculating a service failure time, and a transmission unit for transmitting the calculated service failure time to a service server so that the service failure time is reflected in the usage fee according to the paid DMB service by the service server. It features.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited to the embodiments.

1 is a diagram illustrating a system for providing a paid DMB service according to the present invention.

Referring to FIG. 1, the DMB terminal 110 receives a paid DMB service from the DMB service server 120. For example, a user of the DMB terminal 110 may pay a predetermined fee per incident, pay a predetermined fee on an hourly basis, and receive a paid DMB service from the DMB service server 120 according to the payment of the fee. have. In addition, the DMB service server 120 may provide a predetermined physical reward to the user by reflecting the time when the paid DMB service is not smoothly provided to the DMB terminal 110 later. Hereinafter, the physical rewards will be described as usage fees, but the physical rewards are not limited to the usage fees. In addition, hereinafter, a mobile communication terminal including a DMB function will be described as a DMB terminal according to the present invention, but the DMB terminal may be described as any device that can use a paid DMB service.

First, the DMB terminal 110 receives the paid DMB signal from the DMB service server 120 according to the start of the paid DMB service. Accordingly, the DMB terminal 110 measures the signal strength of the received pay DMB signal at predetermined time intervals, and stores the measured pay DMB signal in the memory for each time zone measured. When the paid DMB service is terminated, the DMB terminal 110 compares the signal strengths stored for each time period with a predetermined reference signal strength set in advance. The predetermined reference signal strength may be set in advance as a reference for allowing the DMB terminal 110 to smoothly provide the paid DMB signal to a user. That is, the user may be satisfied with the quality of the paid DMB service only when the paid DMB signal received from the DMB terminal 110 is equal to or greater than the reference signal strength.

The DMB terminal 110 calculates a time at which signal strengths measured below the reference signal strength are maintained as a result of comparing each of the stored signal strengths with the predetermined reference signal strength, and the signal strength is the reference signal strength. The time maintained below is added up to calculate the service failure time of the paid DMB service. Accordingly, the DMB terminal 110 transmits the service failure time to the DMB service server 120 to be reflected in the billing process. That is, the DMB service server 120 processes the predetermined fee to be refunded to the user according to the received service failure time. If the user pays a postpaid fee according to the paid DMB service, the DMB service server 120 charges the fee for using the paid DMB service in consideration of the service failure time.

According to another embodiment of the present invention, the DMB terminal 110 stores the service paid DMB signal as log information in the memory, and when the paid DMB service is terminated, the stored log information is stored in the DMB service server. May be sent to 120. In this case, the DMB service server 120 may calculate the service failure time in the DMB terminal 110 by using the log information, and may reflect the charge processing as described above.

After all, according to the present invention, to provide a DMB terminal for the billing processing of the paid DMB service for providing the user with a material compensation corresponding to the time when the quality of the paid DMB service is degraded, and the charging operation method of the DMB terminal Can be.

2 is a flowchart illustrating a charging operation method according to an embodiment of the present invention.

Referring to FIG. 2, in step 201, the DMB service server provides a paid DMB service to the DMB terminal according to a user's request. Thus, in step 202, the DMB terminal receives the paid DMB signal from the DMB service server, measures the signal strength of the received paid DMB signal, and stores the signal in the memory. Subsequently, in step 203, the DMB terminal compares the signal strength stored in the memory with a preset reference signal strength, and in step 204, calculates a time for which the signal strength measured below the reference signal strength is maintained. . The time at which the signal strength is maintained below the reference signal strength may be determined to be a time when the paid DMB service is not smoothly provided due to entry into a transliteration region, and the DMB terminal adds the time to the paid fee. It can be determined as a service failure time for the DMB service. As a result, through the step 205, the DMB terminal sums the time to calculate the service failure time and transmits the calculated service failure time to the DMB service server. In the present specification, the DMB service server that provides the paid DMB service is described as performing billing processing according to the paid DMB service. However, the DMB service server may be divided into a server for billing processing and a server providing only a paid DMB service. It can be obvious.

Next, the DMB service server receives the service down time in step 206, and compensates the user fee using the received service down time, or subtracts the user fee by the service down time. It can also be processed.

The DMB terminal according to an embodiment of the present invention may determine whether the calculated time is greater than or equal to a preset reference time when calculating the service failure time in step 205. More specifically, the DMB terminal, even if the stored signal strength is measured to be less than the reference signal strength, if the time that the signal strength is kept below the reference signal strength occurred less than a predetermined reference time, the signal strength is the The time maintained below the reference signal strength is not added to the service failure time. That is, if the signal strength is measured to be less than or equal to the reference signal strength in a short time, the user may not feel any inconvenience in using the paid DMB service, and eventually, the paid DMB service may be determined to be normally serviced. Therefore, the DMB terminal may be reflected in the calculation of the service failure time only when the time at which the signal strength is measured below the reference signal strength is maintained above a preset reference time.

The DMB terminal according to an embodiment of the present invention measures the first signal strength measured below or equal to the reference signal strength when the service failure time is calculated in step 205, and is measured at a different time from the reference signal strength. Between the third signal strengths measured below, a time for which the second signal strength equal to or greater than the reference signal strength is maintained is calculated. The DMB terminal may determine whether the time for which the second signal strength is maintained is less than or equal to a second reference time to determine whether to reflect the service failure time. The above-described embodiment will be described in detail with reference to FIG. 3.

3 is a diagram illustrating the strength of a paid DMB signal received by a DMB terminal while using a paid DMB service according to an embodiment of the present invention.

The DMB terminal stores the signal strength measured at predetermined time intervals from the service start to the service end of the paid DMB service. The signal strength measured at the predetermined time intervals may be represented by continuous signal strength as shown in the graph of FIG. 3. For example, the continuous signal strength may be expressed in consideration of the continuation of the signal strengths measured at the subsequent times.

Referring to FIG. 3, the continuous signal strength includes a time maintained below the reference signal strength, as indicated by reference numeral 301 and reference numeral 303. In this case, as described above, the reference numeral 301 and the reference numeral 303 may determine whether the reference time is greater than or equal to a preset reference time, and may be added to the service failure time only when the reference time is more than the reference time. That is, the reference numeral 301 and the reference numeral 303 may be added to the service failure time only when the signal strength of the paid DMB signal is maintained for the time felt by the user. In addition, there is a time measured between the reference signal 301 and the reference numeral 303 as the reference signal strength or more as shown by the reference numeral 302. Between a time 301 when the first signal strength measured below the reference signal strength is maintained, and a time 303 when the third signal strength measured below another reference signal strength is maintained at a different time in succession. As described above, the time 302 for maintaining the second signal strength equal to or greater than the reference signal strength may determine whether the DMB terminal is less than or equal to the second reference time to determine whether to reflect the service failure time. That is, if the reference numeral 302 is less than or equal to a predetermined time, even if the paid DMB service is normally provided, since the abnormal paid DMB service was provided before and after, the user may feel a failure in using the service. Accordingly, if the time identified by reference numeral 302 is equal to or less than a second preset reference time, reference numeral 302 is added to the service failure time regardless of the signal strength.

According to an embodiment of the present invention, the DMB terminal may detect an intentional antenna operation of the user, and determine whether the paid DMB service is normally provided by the user intentionally operating the antenna. That is, if the paid DMB service is abnormally provided by the intentional operation of the user, the DMB service server excludes the abnormal service time from the service failure time. More specifically, the DMB terminal is measured at the first time when the service failure time is calculated in the step 205, the first signal strength that is greater than or equal to the reference signal strength, and the subsequent signal measured at the second time, and the reference signal strength A signal difference value of the second signal strength which is the following may be calculated, and a time difference value between the first time and the second time may be calculated to determine whether to reflect the service failure time.

FIG. 4 is a diagram for describing determining an end time point of a paid DMB service by analyzing the strength of a stored paid DMB signal.
The DMB terminal according to the present invention can accurately determine the end time of the paid DMB service even when the paid DMB service is not normally provided, such as entering a shadow area. That is, the DMB terminal refers to the memory to determine whether the signal strength is measured for less than the reference signal strength for a predetermined time, and as a result of the determination, if the signal strength is maintained for less than the reference signal strength for a predetermined time The time at which the signal strength starts to be measured below the reference signal strength may be set as an end time 401 of the pay DMB service. That is, the DMB terminal transmits the end time 401 to the DMB service server so that the usage time of the paid DMB service can be accurately calculated. Therefore, the DMB terminal according to the present invention can not identify the end point of the service during a time when the paid DMB service is abnormally provided, such as entering a shadow area, thereby solving a serious problem that the billing process was not clear.
In the above, the DMB terminal stores the signal strength of the paid DMB signal received according to the pay DMB service at predetermined time intervals, analyzes the signal strength to calculate the service failure time, and calculates the calculated service failure time. Although described as providing to the DMB service server, the service failure time may be calculated by the DMB service server. More specifically, the DMB terminal stores the signal strength of the pay DMB signal and the time information measuring the signal strength as log information, and transmits the log information to the DMB service server. Thus, the DMB service server may calculate the service failure time using the received log information as described above. In addition, the DMB service server may provide the user with a standard of physical compensation based on the calculated service failure time, or calculate a usage fee according to the paid DMB service.
As described above, even when the DMB service server calculates the service failure time, the service failure time depends on whether the time for which the signal strength is maintained below the reference signal strength is maintained for more than a preset reference time. Can be reflected in the calculation. In addition, as described above, even if the normal paid DMB signal is measured while the paid DMB service is abnormally provided, when the normal paid DMB signal is maintained for a short time, the normal paid DMB signal is also maintained. It may be reflected in the service failure time.
5 is a block diagram illustrating an internal configuration of a DMB terminal 500 according to an embodiment of the present invention.
The DMB terminal 500 according to an embodiment of the present invention includes a DMB receiver 510, a signal strength measurer 520, a comparator 530, a time calculator 540, a transmitter 550, and a memory ( 560). In addition, the control unit 570 for controlling the overall components of the DMB terminal 500 may further include a wireless communication unit 580 for communicating with a communication system such as a base station to perform the basic functions of mobile communication.
First, the DMB receiver 510 receives a paid DMB signal provided by a DMB service server. In addition, the signal strength measuring unit 520 measures the signal strength of the received pay DMB signal at predetermined time intervals, and stores the signal strength for each time zone in the memory 560. Next, the comparison unit 530 compares the signal strength with a preset reference signal strength with reference to the memory 560, and the time calculator 540 compares the signal strength with the result of the comparison. A time maintained below a reference signal strength is calculated, and a service failure time of the paid DMB service is calculated based on the calculated time. Accordingly, the transmission unit 550 transmits the service failure time to the DMB service server, and the DMB service server receiving the service failure time reflects the service failure time and reflects the fee for using the paid DMB service. Process as much as possible.
As a result, the DMB terminal 500 according to the present invention may provide a criterion for providing the user with a material reward corresponding to a time when the quality of the paid DMB service is degraded.
The time calculator 540 according to an embodiment of the present invention further includes a determination unit (not shown). The determination unit (not shown) determines whether the time at which the signal strength stored in the memory is maintained is greater than or equal to a predetermined reference time, and as a result of the determination, the service failure time only when the calculated time is greater than or equal to the predetermined reference time. Should be reflected in the calculation. That is, if the measured signal strength is maintained only for a short time, it may be determined that the user did not feel any inconvenience while using the paid DMB service, thereby inducing normal charging.
According to another embodiment of the present invention, the determination unit (not shown) is measured at a different time from the first signal strength measured below the predetermined reference signal strength, and measured below the predetermined reference signal strength. Between the third signal strength, the time for which the second signal strength of the predetermined reference signal strength or more is maintained is further calculated, and it is determined whether the time for which the second signal strength is maintained is less than or equal to the predetermined reference time. In addition, the determination unit (not shown) reflects the time at which the second signal strength is maintained only in the service failure time when the time at which the second signal strength is maintained is equal to or less than a predetermined reference time, and the second signal strength is When the time that is maintained is greater than or equal to a predetermined reference time, the time when the second signal strength is maintained is excluded from the service failure time. That is, even if a normal paid DMB service is provided between abnormal paid DMB services, if the time for which the normal paid DMB service is maintained is shorter than a predetermined criterion, the normal paid DMB service may also be classified as an abnormal paid DMB service. Therefore, the time during which the normal paid DMB service maintained for a short time between abnormal paid DMB services is reflected in the service failure time.
According to an embodiment of the present invention, the DMB terminal 500 stores the signal strength measured at the predetermined time interval in the memory 560 as log information, and transmits the stored log information to the DMB service server. The DMB service server may calculate the service failure time based on the log information.

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As a result, the DMB terminal according to the present invention may allow the user to provide a material compensation for the paid DMB service by reflecting the abnormally serviced time.

Embodiments of the invention include a computer readable medium containing program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specifically configured to store and execute the same program instructions are included. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

While specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

According to the present invention, it is possible to provide a DMB terminal for billing processing of a paid DMB service for providing a user with a material reward corresponding to a time when the quality of a paid DMB service is degraded, and a charging operation method of the DMB terminal. .

According to the present invention, by accurately determining the end time of the paid DMB service in the shadowed area, it is possible to accurately calculate the fee according to the use of the service.

Claims (17)

In the charging operation method of the DMB terminal for the charge processing of the paid DMB service, Measuring signal strength of the received DMB signal at predetermined time intervals and comparing each of the measured signal strengths with a preset reference signal strength; Calculating a time for which the measured signal strength is kept below the reference signal strength according to the comparison result; Calculating a service failure time of the paid DMB service based on the calculated time; And Transmitting the calculated service failure time to a service server, so that the service failure time is reflected in the usage fee according to the paid DMB service by the service server; Charging operation method of the DMB terminal, characterized in that it comprises a. The method of claim 1, The step of calculating the service failure time of the paid DMB service, Determining whether the calculated time is equal to or greater than a preset reference time; And Calculating the service failure time based on the calculated time only when the calculated time is equal to or greater than the reference time as a result of the determination; Charging operation method of the DMB terminal, characterized in that it comprises a. The method of claim 1, The step of calculating the service failure time of the paid DMB service, Calculate a time at which the second signal strength equal to or greater than the reference signal strength is maintained between the first signal strength measured to be equal to or less than the reference signal strength and the third signal strength measured subsequent to another time and measured to be equal to or less than the reference signal strength. Doing; And Determining whether the time at which the second signal strength is maintained satisfies a second reference time or less Charging operation method of the DMB terminal, characterized in that it comprises a. The method of claim 3, The step of calculating the service failure time of the paid DMB service, Calculating a service failure time in consideration of a time for which the second signal strength is maintained when satisfied as a result of the determination; or Calculating the service failure time by excluding the time for which the second signal strength is maintained when it is not satisfied as a result of the determination; Charging operation method of the DMB terminal, characterized in that it further comprises. The method of claim 1, The step of calculating the service failure time of the paid DMB service, Calculating a signal difference value between a first signal strength measured at a first time and greater than or equal to the reference signal strength, and a second signal strength measured subsequent to a second time and less than or equal to the reference signal strength; Calculating a time difference value between the first time and the second time; And Calculating the service failure time by excluding the time for which the second signal strength is maintained when the calculated signal difference value is equal to or greater than a first threshold value and the calculated time difference value is equal to or less than a second threshold value. Charging operation method of the DMB terminal, characterized in that it comprises a. The method of claim 1, Detecting an operation of the antenna, The step of calculating the service failure time of the paid DMB service, Determining whether a signal intensity measured after an operation point at which an operation of the antenna is sensed is reduced from above the reference signal strength to below the reference signal strength; And Calculating the service failure time by subtracting the time for which the measured signal strength is maintained when it is decreased below the reference signal strength. Charging operation method of the DMB terminal, characterized in that it comprises a. The method of claim 1, Determining whether a signal strength is measured for a predetermined time below the reference signal strength; And Setting the time at which the signal strength begins to be measured below the reference signal strength as an end time of the pay DMB service when it is maintained and measured for the predetermined time as a result of the determination; Charging operation method of the DMB terminal, characterized in that it further comprises. Calculating a service providing time of a paid DMB service provided to the DMB terminal; Receiving log information from the DMB terminal storing signal strength of a paid DMB signal at predetermined time intervals; Comparing the signal strength with a preset reference signal strength with reference to the log information; Calculating a maintenance time for maintaining the signal strength below the reference signal strength as a service failure time according to the comparison result; And Charging the user of the DMB terminal based on the calculated service failure time Charging operation method in the server comprising a. The method of claim 8, The step of calculating the service failure time, Determining whether the calculated holding time is equal to or greater than a preset reference time; And Calculating the maintenance time as a service failure time only when the calculated maintenance time is equal to or greater than the reference time. Charging operation method in the server comprising a. The method of claim 8, The step of calculating the service failure time, Calculate a time at which the second signal strength equal to or greater than the reference signal strength is maintained between the first signal strength measured to be equal to or less than the reference signal strength and the third signal strength measured subsequent to another time and measured to be equal to or less than the reference signal strength. Doing; Determining whether a time for which the second signal strength is maintained satisfies a second reference time or less; And Calculating a service failure time in consideration of a time for which the second signal strength is maintained when satisfied as a result of the determination; or Calculating the service failure time by excluding the time for which the second signal strength is maintained when it is not satisfied as a result of the determination; Charging operation method in the server comprising a. A computer-readable recording medium for recording a program for executing the method of any one of claims 1 to 10 on a computer. In the DMB terminal for billing processing of the paid DMB service, A signal strength measuring unit for measuring a signal strength of the received pay DMB signal at predetermined time intervals; A comparison unit comparing each of the measured signal strengths with a preset reference signal strength; A time calculating unit calculating a time for which the measured signal strength is maintained below the reference signal strength according to the comparison result, and calculating a service failure time of the pay DMB service based on the calculated time; And Transmission unit for processing the service failure time is reflected in the usage fee according to the paid DMB service by transmitting the calculated service failure time to a service server DMB terminal comprising a. The method of claim 12, The time calculation unit, It is determined whether the calculated time is greater than or equal to a preset reference time, and as a result of the determination, the service failure time is calculated based on the calculated time only when the calculated time is greater than or equal to the reference time. DMB terminal. The method of claim 12, The time calculation unit, Calculate a time at which the second signal strength equal to or greater than the reference signal strength is maintained between the first signal strength measured to be equal to or less than the reference signal strength and the third signal strength measured subsequent to another time and measured to be equal to or less than the reference signal strength. And determining whether the time at which the second signal strength is maintained satisfies a second reference time or less. The method of claim 14, The time calculation unit, If satisfied, the service failure time is calculated in consideration of the time that the second signal strength is maintained, or If it is not satisfied, the service failure time is calculated by excluding the time for which the second signal strength is maintained. The method of claim 12, The time calculation unit, Calculating a signal difference value between a first signal strength measured at a first time and greater than or equal to the reference signal strength, and a second signal strength measured at a second time and less than or equal to the reference signal strength, wherein the first time and the second signal are calculated; Compute a time difference value with time, and when the calculated signal difference value is greater than or equal to the first threshold value and the calculated time difference value is less than or equal to the second threshold value, the time at which the second signal strength is maintained is excluded. And calculating the service failure time. The method of claim 12, Further comprising a sensor for detecting the operation of the antenna, The time calculation unit, It is determined whether the signal strength measured after the operation time at which the operation of the antenna is sensed is reduced to less than or equal to the reference signal strength from the reference signal strength or more. DMB terminal, characterized in that for calculating the service failure time by excluding the time the signal strength is maintained.

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