KR100843268B1 - System?and?method?for?operating?of?digital?multimedia?broadcasting?single?frequency?network - Google Patents

Abstract

The present invention relates to a DMB SFN operating system, and provides a real-time reception state from at least one interested station by analyzing reception quality information measured from the DMB signal and generating reception state analysis information linked with map information. Disclosed are a system and method for operating a DMB SFN to enable stable and efficient management of the DMB SFN. The DMB SFN operating system according to an embodiment of the present invention receives each DMB signal broadcasted from a plurality of transmission stations, and generates reception quality information by measuring a predetermined reception quality of the received DMB signal. An SFN monitoring apparatus, an SFN analyzing apparatus configured to analyze the reception quality information generated by the SFN monitoring apparatus to generate reception state analysis information linked to at least one of map information and transmission station information, and the generated reception state analysis information. And a display device for displaying, wherein the SFN analysis system is configured to receive from at least one interested station of the plurality of transmitters for the current receiving point through the display apparatus according to the reception state analysis information for the plurality of transmitters. It provides a real-time reception state of.

DMB SFN, reception quality information, reception status analysis information, map information

Description

SYSTEM AND METHOD FOR OPERATION OF DMS SPF N {SYSTEM AND METHOD FOR OPERATING OF DIGITAL MULTIMEDIA BROADCASTING SINGLE FREQUENCY NETWORK}

1 is a schematic diagram illustrating a system for operating a DMB SFN according to an embodiment of the present invention.

2 is a flowchart illustrating a method for operating a DMB SFN according to an embodiment of the present invention.

3 is a flowchart illustrating a method of generating reception quality information according to an embodiment of the present invention.

4 is a flowchart illustrating a method of generating reception state analysis information according to an embodiment of the present invention.

5 is an exemplary diagram illustrating a screen on which TII information is displayed according to an embodiment of the present invention.

6 is an exemplary view illustrating a screen on which CIR information is displayed according to an embodiment of the present invention.

7 is an exemplary diagram for explaining a principle of measuring a distance by using CIR information according to an exemplary embodiment.

8 is an exemplary diagram illustrating a screen on which electric field strength information is displayed according to an exemplary embodiment.

9 is an exemplary view illustrating another screen on which electric field strength information is displayed according to an exemplary embodiment.

10 is an exemplary diagram illustrating another screen on which electric field strength information is displayed according to an embodiment of the present invention.

11 is an exemplary diagram for describing a process of reproducing reception state analysis information according to an embodiment of the present invention.

12 is an exemplary diagram for describing another process of reproducing reception state analysis information according to an embodiment of the present invention.

13 is an exemplary view for explaining another process of reproducing reception state analysis information according to an embodiment of the present invention.

14 is an exemplary diagram for describing a screen for reproducing reception state analysis information according to an exemplary embodiment.

15 is an exemplary diagram showing a distance to a transmitting station according to an embodiment of the present invention.

16 is an exemplary view showing the terrain altitude to the transmitting station according to an embodiment of the present invention.

17 is an exemplary diagram illustrating a screen on which video reception analysis state information is displayed according to an embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100: DMB SFN Operating System

110: SFN monitoring device

111: field strength meter

112: oscilloscope

113: test receiver

114: GPS receiver

115: GPIB card

116: RDI card

120: SFN analysis device

121: collection of quality information

122: reception status analyzer

123: Map Information DB

124: source information DB

125: terrain elevation information DB

126: memory

130: video analysis device

140: display device

The present invention relates to a Digital Multimedia Broadcasting (DMB) single frequency network (SFN) operating system, and more particularly, to a system and method for operating a DMB SFN that can manage the DMB SFN stably and efficiently. In addition, the system and method for analyzing the DMB SFN corresponds to a comprehensive system and method that can be used for overall measurement, analysis, and monitoring related to DMB SFN, such as reception quality measurement, coverage measurement, and other DMB SFN monitoring in the DMB SFN. do.

In recent years, public interest in DMB has been greatly increased. DMB, which is called a handheld TV, is a broadcasting service that can transmit video, audio, and data multimedia to not only a fixed receiving terminal but also a vehicle or a walking terminal. Say.

The DMB may be classified into a terrestrial DMB transmitting broadcast content from an antenna on the ground and a satellite DMB transmitting broadcast content from an artificial satellite according to a transmission scheme.

Terrestrial DMB broadcasting network analysis system is needed first to respond quickly and efficiently to the demands of terrestrial DMB backbone stations and relay stations, which are expected to increase rapidly after the start of such DMB broadcasting. Unlike other broadcasting media, the DMB needs to configure a single frequency network (SFN), so that the characteristics of the SFN are considered in a broadcasting network analysis system that needs to adjust signal delay time, distance between transmission stations, and size of transmission power. Should be.

At present, the joint development with the university research institute for the broadcasting network analysis system that can determine the suitability of the SFN composition of the domestic terrestrial DMB, which has been standardized by Korea and succeeded in the commercial service for the first time in the world. In particular, the broadcast network analysis system needs not only to be able to measure while fixed and mobile, but also needs to analyze a rapidly changing reception environment during mobile measurement, and thus needs to support a wide range of measurement items and manage data.

However, the system for operating the DMB SFN according to the prior art not only measures and analyzes a few reception quality information but also shows only the received reception quality information numerically, so that it is difficult to perform an efficient network analysis. There was a problem that it is difficult to operate the DMB SFN.

The present invention has been made to solve the above problems, and provides a real-time reception state from at least one DMB station of interest, and measures the reception quality items from the DMB signal to reliably and efficiently manage the DMB SFN. It is an object of the present invention to provide a system and a method for operating a DMB SFN in conjunction with map information, transmission station information, etc. by analyzing a reception state from the measured reception quality items.

In order to achieve the above object, the DMB SFN operating system according to an embodiment of the present invention is a system for operating a digital multimedia broadcasting (DMB) single frequency network (SFN), each broadcasted from a plurality of transmission stations A SFN monitoring device for receiving a DMB signal and measuring a predetermined reception quality of the received DMB signal to generate reception quality information, and analyzing the reception quality information generated by the SFN monitoring device to map information and transmission information. An SFN analysis device for generating reception state analysis information associated with at least one of the following; and a display device for displaying the generated reception state analysis information, wherein the SFN analysis system includes each reception state for the plurality of transmission stations. Image of the current receiving point through the display device according to the analysis information It characterized in that it provides real-time status of the receiving from the at least one transmitting station of interest of the plurality of transmitting station.

In order to achieve the above object, the method for operating a DMB SFN according to an embodiment of the present invention is a system for operating a digital multimedia broadcasting (DMB) single frequency network (SFN), each broadcasted from a plurality of transmission stations Receiving a DMB signal, measuring a predetermined reception quality of the received DMB signal, generating reception quality information from the measured reception quality, analyzing the generated reception quality information, map information, and Generating reception state analysis information linked to at least one of the transmission station information, and displaying the generated reception state analysis information, wherein the displaying step includes: each reception state of the plurality of transmission stations. At least one of the plurality of transmitting stations for the current receiving point according to the analysis information It is characterized by providing a real-time reception state from the transmitting station.

Hereinafter, with reference to the accompanying drawings and the contents described in the accompanying drawings will be described in detail preferred embodiments of the present invention, but the present invention is not limited or restricted by the embodiments. Like reference numerals in the drawings denote like elements.

1 is a schematic diagram illustrating a system 100 for operating a DMB SFN according to an embodiment of the present invention.

As shown in FIG. 1, a system 100 for operating a DMB SFN according to an embodiment of the present invention includes an electric field strength meter 111, an oscilloscope 112, a test receiver 113, and a GPS receiver 114. SFN monitoring device 110, GPN (General Purpose Interface Bus) card 115 including the SFN analysis device 120, and video data analysis device (130) in conjunction with the RDI (Receiver Data Interface) card 116 ), And the display device 140. Here, the SFN analyzing apparatus 120 includes a quality information collecting unit 121, a reception state analyzing unit 122, a map information DB (Data Base) 123, a transmitting station information DB 124, and a terrain altitude information DB 125. ), And memory 126.

The system for operating the DMB SFN can not only manage the DMB SFN stably and efficiently, but also can be used in reception quality measurement, coverage measurement, and other DMB SFN monitoring in the DMB SFN.

The SFN monitoring apparatus 110 may generate reception quality information by receiving each DMB signal broadcast from a plurality of transmission stations and measuring various predetermined reception qualities of the received DMB signal. The plurality of transmitting stations includes a main station and a relay station. The main station is, for example, a transmission station existing in Gwanak Mountain, Namsan Mountain, Yongmun Mountain, etc., and receives and broadcasts a broadcast signal directly from an DMB broadcasting station such as KBS, MBC, SBS, YTN, or the like through an optical cable. In addition, the relay station is a transmission station for receiving a signal from the main station and relaying the broadcast station. The relay station wirelessly receives a broadcast signal from the main station and broadcasts the received signal.

In this case, the SFN monitoring device 110 includes an electric field strength meter 111, an oscilloscope 112, a test receiver 113, and a GPS receiver 114. That is, the electric field strength measuring unit 111 has a built-in general-purpose receiver, and generates electric field strength information by measuring the electric field strength of the DMB signal from each transmitter for the corresponding band at a predetermined center frequency through the general-purpose receiver. In addition, the GPS receiver 114 measures position or time based on GPS to generate position or time information. The test receiver 113 incorporates a predetermined DMB receiver, measures TII, CIR, and BER for signals from respective transmission stations received through the DMB receiver, and measures TII information, first CIR information, and second CIR information. And BER information, and the oscilloscope 112 may convert first CIR information measured by the test receiver 113 into CIR data for analogly displaying a real-time state of the CIR. Here, the second CIR information is information summarizing the first CIR information as described below.

The SFN analyzing apparatus 120 uses the GPIB card 115 as an interface to receive the received quality information, that is, the TII information, the first and second CIR information, the BER information, the electric field strength information, And collecting the GPS-based location or time information, analyzing the reception quality information to generate reception state analysis information linked with map information, transmission station information, and the like, and storing the reception state analysis information in the memory ( 126).

In addition, the video analysis device 130 receives the video data for the DMB signal received by the DMB receiver in the test receiver 113 through the RDI card 116, and analyzes the received video data to analyze the video. Among the analysis information, for example, synchronization information, transport stream packet (TP) information, audio / video frame information, audio / video packetized elementary stream (PES) information, PSI (Program Specific Information) information, clock information, and bitrate information. At least one may be linked with a screen for playing a video in real time.

The display device 130 displays the generated reception state analysis information or video analysis information in real time, so that the system 100 for operating the DMB SFN according to an embodiment of the present invention can be operated by the user stably and efficiently. It can provide information to enable SFN to operate.

A method for operating a DMB SFN according to an embodiment of the present invention configured as described above will be described with reference to FIG. 2.

2 is a flowchart illustrating a method for operating a DMB SFN according to an embodiment of the present invention.

As shown in FIG. 2, the method for operating a DMB SFN according to an embodiment of the present invention includes maintaining map information DB (S210), maintaining terrain altitude information DB (S220), and transmitting information DB. Maintaining (S230), generating reception quality information (S240), collecting reception quality information (S250), generating reception status analysis information (S260), and providing a real-time reception state ( S270), backing up reception state analysis information (S280), and providing a backup reception state (S290).

The method for operating the DMB SFN according to an embodiment of the present invention made as described above is described in detail.

First, the SFN analyzing apparatus 120 includes a map information DB 123 for storing map information, a station information DB 124 for storing each station information of a plurality of transmitting stations, and a terrain altitude profile. Information DB 125 can be maintained and managed (S210 to S230).

The SFN monitoring apparatus 110 receives each DMB signal broadcast from the plurality of transmission stations, and selects a predetermined reception quality for the received DMB signal, for example, TII (Transmitter Identification Information) and CIR (Channel). Impulse Response), BER (Bit Error Rate), Field Strength, and position or time may be measured and reception quality information may be generated based on the measurement (S240). A method of generating reception quality information as described above will be described with reference to FIG. 3.

3 is a flowchart illustrating a method of generating reception quality information according to an embodiment of the present invention.

As shown in FIG. 3, the method for generating reception quality information according to an embodiment of the present invention may include generating TII information (S310), generating CIR information (S320), and generating BER information. (S330), generating field strength information (S340), and generating time or location information (S350). In addition, these steps (S310 to S350) may be performed independently as well as performed in a different order for each device.

The method of generating reception quality information according to an embodiment of the present invention made as described above will be described in detail as follows.

The test receiver 113 may generate TII information by measuring TII (S310). That is, the TII is determined as a predetermined symbol according to the DMB signal standard, which can be extracted by demodulating the DMB signal. The test receiver 113 may convert the measured TII into digital TII information that can be read by the SFN analyzing apparatus 120 and output the TII information to the SFN analyzing apparatus 120.

In addition, the test receiver 113 may generate the first CIR information by measuring the CIR (S320). The CIR may be calculated by using an orthogonal frequency division multiplex (OFDM) symbol promised as a transmission / reception standard from a corresponding RF signal when receiving a DMB signal. The test receiver 113 may convert the measured CIR into first CIR information in digital form, which may be read by the SFN analyzing apparatus 120, and output the first CIR information to the SFN analyzing apparatus 120. The oscilloscope 112 connected to the test receiver 113 generates CIR data corresponding to the first CIR information for each time, for example, in units of several microseconds. The CIR data corresponds to data for analogly displaying the real time state of the CIR. The test receiver 113 may generate second CIR information by summarizing the first CIR information.

In addition, the test receiver 113 may generate BER information by measuring the BER (S330). That is, the BER may be obtained by receiving and demodulating a DMB signal. The test receiver 113 may convert the measured BER into digital BER information that can be read by the SFN analyzer 120 and output the BER information to the SFN analyzer 120.

The electric field strength meter 111 may generate electric field strength information by measuring electric field strength (S340). That is, the electric field strength may be obtained by receiving a DMB signal and measuring an electric field of the corresponding RF signal. The electric field strength measuring unit 111 converts the measured electric field strength into electric field strength information in a digital form that can be read by the SFN analyzing apparatus 120, and the electric field strength information is transmitted through the GPIB card 115. It may be output to the SFN analysis device 120.

In addition, the GPS receiver 112 measures a position or time based on a Global Positioning System (GPS) and converts the measured position or time into positional or time information in digital form that can be read by the SFN analyzer 120. The conversion may be output to the SFN analysis apparatus 120 (S350). The SFN analyzing apparatus 120 may generate reception state analysis information based on the reception quality information generated as described above.

At this time, the DMB SFN operating system 100 according to an embodiment of the present invention may support additional information that can be input by the user separately from the measurement. Such additional information may include information on subjective reception quality judgment, for example, information on a reception point location such as reception good or poor reception, for example, a real-time memo of a user during a measurement, such as a tunnel, a mountain, or a building. . The additional information input as described above may be stored in a memory together with the generated reception quality information at the time of input.

The SFN analyzing apparatus 120 includes the quality information collecting unit 121 and the receiving state analyzing unit 122. That is, the quality information collection unit 121 collects the measured reception quality information (S250), and the reception state analysis unit 122 analyzes the collected reception quality information to be linked with map information and transmission information. The reception state analysis information may be generated (S260). A method of generating such reception state analysis information will be described with reference to FIG. 4.

4 is a flowchart illustrating a method of generating reception state analysis information according to an embodiment of the present invention.

As shown in FIG. 4, the method for generating reception state analysis information according to an embodiment of the present disclosure includes generating transmission station identification information (S410), generating channel state information (S420), and signal error information. Generating step (S430), generating field state information (S440), and generating receiving point information (S450). In addition, these steps (S410 to 450) may be performed independently of each device as well as performed in a different order.

The method of generating reception state analysis information according to an embodiment of the present invention made as described above will be described in detail as follows.

The reception state analyzer 122 analyzes the TII information from the test receiver 113 to generate transmission confirmation information including any one or more of Main ID, Sub ID, Strength, name of transmission station, and distance to the transmission station. It may be (S410). Here, the Main ID is a main identifier for the transmitting station, which is information for knowing which region, for example, Seoul, Daejeon, Busan, Daegu, etc. among transmitters scattered in each region. The Sub ID is a sub-identifier of the Main ID for the transmitting station and is information for identifying which transmitter in the area indicated by the Main ID. The strength is information indicating the signal strength of the TII, and is information that allows the transmitter to know whether the TII signal strength is high or low at the current reception point. The source name is information for identifying the corresponding source name according to the Main ID and the Sub ID. The distance to the transmitting station is information for knowing the distance from the current receiving point to the transmitting station. The distance to the transmitting station may be calculated from GPS-based time and location information.

The reception state analyzer 122 analyzes the CIR data of the signal from each of the transmitters from the oscilloscope 112 to generate CIR analog display data, and generates the CIR analog display data from each of the transmitter signals from the test receiver 113. 2 CIR information may be analyzed to generate CIR summary data (S420). The CIR summary data and the CIR analog representation data correspond to channel state information. Here, the CIR summary data is information summarizing the channel state according to the CIR at the current reception point. The CIR analog display data is digital data for displaying the CIR at the current receiving point in analog form.

The reception state analyzer 122 may generate signal error information by analyzing BER information of each transmission station signal from the test receiver 113 (S430). In this case, the BER information is information for demonstrating how much error the data after demodulating the received DMB signal indicates. The BER information is converted into data in a form that can be displayed on a display device.

The reception state analyzer 122 analyzes electric field strength information of each transmission station signal from the electric field strength meter 111 to obtain electric field state information including any one or more of received power, received electric field strength, and spectral waveform. Can be generated (S440). Here, the received power may be displayed in dBm as a corresponding power value according to the electric field of the DMB signal received at the current reception point. The received electric field strength may be expressed in dBuV / m as an electric field strength of a DMB signal received at a current reception point. The spectral waveform information is information for displaying the received electric field strength in the frequency domain.

The reception state analyzer 122 analyzes GPS-based location or time information from the GPS receiver 114 and generates reception point information including date, time, longitude, latitude, distance to a transmission station, and speed. It may be (S450).

In addition, the video analyzing apparatus 130 receives video data through the RDI card 116 and analyzes the received video data to analyze video information, for example, synchronization information and TP (Transport stream Packet) information. , Audio / video frame information, audio / video packetized elementary stream (PES) information, PSI (Program Specific Information) information, clock information, and bitrate information can be generated. The video analysis information generated as described above is described in detail as follows.

The synchronization information is information indicating whether synchronization is synchronized, and provides RDI synchronization information and TS (Transport Stream) synchronization information, and the TP information is information indicating a TP reception status during a measurement period, and the number of TPs for which reception is predicted. , Total number of TPs received, and number of TPs not received.

The audio / video frame information is information indicating an audio / video frame reception state during a measurement period, and the number of audio / video frames expected to be received, the number of audio / video frames received, the number of audio / video frames not received, and the like. The audio / video PES information is information indicating an audio / video PES reception state during a measurement period, and includes information such as the total number of audio / video PES received and the number of PES where audio / video frame extraction is impossible. to provide.

The PSI information includes measurement information on valid PSI that satisfies the transmission period specified in the standard, that is, a program association table (PAT), a program map table (PMT), an object descriptor (OD), and a binary format for scene (BIFS) information. In addition, the clock information is also measured information about a valid clock that satisfies the transmission period specified in the standard, that is, Program Clock Reference (PCR), Object Clock Reference (OCR), Composition Time Stamp (CTS), PTS. (Presentation Time Stamp) information, etc. are provided.

The bitrate information provides information on the total bit rate of the video service, the bit rate allocated for the transmission of the detailed item, and the ratio of the detailed item to the total transmission capacity.

In this case, the SFN analysis device 120 or the video analysis device 130 may be implemented as a personal computer (PC), communication with individual measurement equipment for measuring the reception quality, equipment control, measurement Value requests and receptions, equipment errors, and log management can be performed.

As a result, in FIG. 2, the display apparatus 140 may provide a real-time reception state from at least one interested station among the plurality of transmitters for the current reception point through the generated reception state analysis information (S270). .

The reception state analysis information displayed as above will be described with reference to FIGS. 5 to 10.

5 is an exemplary diagram illustrating a screen on which TII information is displayed according to an embodiment of the present invention.

As shown in FIG. 5, the DMB SFN operating system 100 according to an embodiment of the present invention may include reception status analysis information, for example, the transmission station identification information, channel status information, signal error information, synchronization status information, The electric field state information, the reception point information, and the like may be displayed on the display device in conjunction with the map information or the transmitter information. In particular, the transmitter identification information analyzed from the TII information, that is, at least one main ID, sub ID, strength, station name, and distance to the transmitter may be displayed on the display apparatus 130 in association with map information. .

6 is an exemplary view illustrating a screen on which CIR information is displayed according to an embodiment of the present invention.

As shown in FIG. 6, the DMB SFN operating system 100 according to an exemplary embodiment of the present invention may display channel state information, that is, CIR summary data (time of each CIR pulse, between CIR pulses) among the displayed reception state analysis information. Time difference, actual distance between CIR pulses, and the like, and CIR analog display data (such as time variation of CIR pulses) may be displayed on the display device 130 in conjunction with map information or transmission station information. In particular, the CIR pulses within the Guard Interval of the OFDM standard may be enlarged and displayed in the region where the map information is displayed through the CIR analog display data.

For example, the DMB SFN operating system 100 according to an embodiment of the present invention displays the current state, measurement type, subjective reception quality determination, reception point location information, and service information on the top of the display device 140. The reception quality information may be displayed on the left side of the display device 140 and the map information linked to the reception quality information on the right side of the display device 140, respectively.

The CIR summary data includes at least one of First Peak, Average Peak, Last Peak, Interval, and Distance. The first peak is a time calculated by applying a weight to the peaks, the average peak is a time calculated by applying a weight to the peaks, the last peak is a time at a last peak, and the interval is the last at the fist peak. The time to the peak, the Distance means the distance calculated by the Interval, respectively.

The DMB SFN analysis system 120 according to an embodiment of the present invention sets a delay time of an OFDM transmitter or multiplexer of a transmitting station when the time interval between the displayed CIR pulses is different from an expected value. Thereafter, while checking the CIR pulses at the fixed receiving point, a process of checking the reception state while moving after adjusting the delay time of the transmitter or the multiplexer is performed.

With the CIR information, it is possible to know at what time the signal received from each transmission station arrives at the current reception point, and to what point, the principle of measuring the distance using the CIR information will be described with reference to FIG. 7.

7 is an exemplary diagram for explaining a principle of measuring a distance by using CIR information according to an exemplary embodiment.

As shown in FIG. 7, the DMB SFN operating system 100 according to an exemplary embodiment of the present invention provides a DMB from a first transmitter T _X 1 and a second transmitter T _X 2 at a reception point of knowing a distance to each transmitter. Suppose you receive a signal. If the distances D1 and D2 to each transmitter are identical, the DMB signal can be received from each transmitter at the same time, so that CIR pulses with little difference in time as well as time difference can appear within the guard interval.

However, if the distances D1 and D2 to the respective transmitters do not coincide, CIR pulses having a predetermined time difference within the guard interval may appear, and a transmission station signal close to the reception point appears first. On the basis of the time difference of the analog CIR pulses, it is checked whether the difference between the distance from the first transmitter T _X 1 to the second transmitter T _X 2 at the receiving point is correct, and if the difference is not correct, the transmitter Or it can be used to readjust the delay time of the multiplexer.

As such, when the time interval or distance between the displayed CIR pulses is different from an expected value, the DMB SFN analysis system 120 according to an embodiment of the present invention guides the delay time of the transmitter and the multiplexer to be set differently. To present. Thereafter, the process of checking the reception status of the various reception points can be performed while checking and moving the CIR pulses again at the fixed reception point.

8 is an exemplary diagram illustrating a screen on which electric field strength information is displayed according to an exemplary embodiment.

As shown in FIG. 8, the DMB SFN operating system 100 according to an exemplary embodiment may map the received reception state analysis information, that is, the field strength information including the received field strength and the spectral waveform to facilitate analysis. The information may be displayed on the display device 140 in association with information or transmission station information. In particular, the received electric field strength and the spectral waveform may be enlarged and displayed in an area where the map information is displayed.

9 is an exemplary view illustrating another screen on which electric field strength information is displayed according to an exemplary embodiment.

As shown in FIG. 9, the DMB SFN operating system 100 according to an embodiment of the present invention may receive received electric field strengths measured from DMB signals of a plurality of operators rather than one operator providing DMB broadcasting. Multi-block receive field strength and spectral waveforms can be displayed simultaneously. The multiblock reception field strength means that the reception field strength is measured from the DMB signals of each service provider using a time division multiplexing (TDM) scheme.

10 is an exemplary diagram illustrating another screen on which electric field strength information is displayed according to an embodiment of the present invention.

As shown in FIG. 10, the DMB SFN operating system 100 according to an exemplary embodiment of the present disclosure may display displayed reception state analysis information, that is, map or transmission station information according to a predetermined criterion so as to easily analyze the received electric field strength. It can be shown in detail together. That is, the measured received electric field strength may be divided into received electric field strengths in a predetermined range unit, and the received electric field strengths may be measured according to a moving path in different colors.

Subsequently, the DMB SFN operating system 100 according to an embodiment of the present invention backs up the real-time reception state, that is, the reception state analysis information to the memory (S280), and the backup reception state analysis information is backed up according to a user's request for reproduction. The reception state of the DMB signal may be provided (S290). A process of reproducing reception state analysis information according to an embodiment of the present invention will be described with reference to FIGS. 11 to 13.

11 is an exemplary diagram for describing a process of reproducing reception state analysis information according to an embodiment of the present invention.

As shown in FIG. 11, the DMB SFN operating system 100 according to an embodiment of the present invention may satisfy at least one of a condition, for example, a date or time, among received state analysis information backed up in a memory. It can extract and display the received status analysis information of.

The DMB SFN operating system 100 according to an embodiment of the present invention may select at least one reception status analysis information from among reception status analysis information displayed according to the predetermined condition.

12 is an exemplary diagram for describing another process of reproducing reception state analysis information according to an embodiment of the present invention.

As shown in FIG. 12, the DMB SFN operating system 100 according to an embodiment of the present invention may display at least one reception quality information according to a date and a time for the selected reception state analysis information. That is, at least one reception quality information may be selected from all reception quality information measured from the DMB signal and only the selected reception quality information may be displayed.

The DMB SFN operating system 100 according to an embodiment of the present invention may not only add, delete, or modify the reception state analysis information to the memory, but also may import from or export to an external device.

13 is an exemplary view for explaining another process of reproducing reception state analysis information according to an embodiment of the present invention.

As shown in FIG. 13, the DMB SFN operating system 100 according to an embodiment of the present invention may delete or modify at least one reception status analysis information among the reception status analysis information displayed according to a predetermined condition. You can also import or export.

The received state analysis information selected from among the backup state analysis information thus backed up may be displayed, which will be described with reference to FIG. 14.

14 is an exemplary diagram for describing a screen for reproducing reception state analysis information according to an exemplary embodiment.

As shown in FIG. 14, the DMB SFN operating system 100 according to an embodiment of the present invention may receive reception state analysis information selected in association with map information or transmission station information, for example, the transmission confirmation information and channel state information. The signal error information, the synchronization state information, the electric field state information, and the reception point information may be displayed on the display apparatus 140 in the same manner as the environment at the point of time of measurement.

The DMB SFN operating system 100 according to an embodiment of the present invention may adjust a progress speed of a screen for playing reception status analysis information, and display only reception status analysis information in a selected specific region by selecting a specific region. In addition, playback can be performed from the selected specific region.

15 is an exemplary diagram showing a distance to a transmitting station according to an embodiment of the present invention.

As shown in FIG. 15, the DMB SFN operating system 100 according to an exemplary embodiment of the present invention may include transmitting stations within a predetermined distance from a current receiving point receiving respective DMB signals broadcast from a plurality of transmitting stations. Map information representing distances to the transmitting stations may be provided. That is, the DMB SFN analysis system 120 according to an embodiment of the present invention may represent concentric circles on the basis of a predetermined distance from the current reception point, and may indicate the number of transmitting stations, the names of the transmitting stations, the distance to the transmitting station, and the like. In addition to the interval between the concentric circles, the number of transmission stations existing between the concentric circles, the name of the transmission station, and the distance to the transmission station can be indicated.

The DMB SFN operating system 100 according to an embodiment of the present invention may provide a terrain altitude profile up to transmission stations within the predetermined distance.

16 is an exemplary view showing the terrain altitude to the transmitting station according to an embodiment of the present invention.

As shown in FIG. 16, the DMB SFN operating system 100 according to an embodiment of the present invention may transmit to a transmitting station within a predetermined distance from a current receiving point that receives each DMB signal broadcast from a plurality of transmitting stations. It can provide a terrain altitude profile of.

In addition, the DMB SFN operating system 100 according to an embodiment of the present invention may display the video reception state analysis information on the display device 140, which will be described with reference to FIG. 17.

17 is an exemplary diagram illustrating a screen on which video reception state analysis information is displayed according to an embodiment of the present invention.

As shown in FIG. 17, the DMB SFN operating system 100 according to an embodiment of the present invention may analyze the video reception state analysis information, that is, the video quality information, for example, synchronization information, and transport stream packet (TP). Information, audio / video frame information, audio / video packetized elementary stream (PES) information, PSI (Program Specific Information) information, clock information, and bitrate information in conjunction with a screen for playing a video in real time. ) Can be displayed.

An embodiment of the present invention may include a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, local data files, local data structures, or 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 may include high-level language code that can be executed by a computer using an interpreter as well as machine code such as produced by a compiler.

Although 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 by the claims below and equivalents thereof.

As can be seen from the above description, the system and method for operating the DMB SFN according to an embodiment of the present invention, by analyzing the reception quality information measured from the DMB signal to generate the reception state analysis information linked with the map information By providing a real-time reception state from at least one transmitting station of interest, it is possible to operate a stable DMB SFN.

In addition, the system and method for operating the DMB SFN according to an embodiment of the present invention, by analyzing the reception quality information measured from the DMB signal to generate the reception status analysis information linked with the map information, the same environment as the measurement time It is possible to back up the received state analysis information generated by the user or to play back the received state analysis information, thereby improving user convenience.

Claims (29)

In a system for operating DMB (Digital Multimedia Broadcasting) SFN (Single Frequency Network), An SFN monitoring apparatus for receiving each DMB signal broadcast from a plurality of transmission stations, and measuring reception quality of a predetermined reception quality of the received DMB signal to generate reception quality information; An SFN analysis device configured to analyze the reception quality information generated by the SFN monitoring device to generate reception state analysis information linked to at least one of map information and transmission station information; And A display device for displaying the generated reception state analysis information Including, The SFN analyzing apparatus provides a real-time reception state from at least one interested station of the plurality of transmission stations for a current reception point through the display device according to the reception state analysis information of the plurality of transmission stations. DMB SFN operating system characterized in that. The method of claim 1, The SFN analysis device, A map information DB (Data Base) for storing the map information; A source information DB for storing each source information for the plurality of sources; A quality information collecting unit which collects respective reception quality information of the plurality of transmission stations measured from the received DMB signal; And A reception state analyzer configured to analyze the reception quality information and generate reception state analysis information linked to at least one of the map information and the transmitter information DMB SFN operating system comprising a. The apparatus of claim 1, wherein the SFN analyzer is A terrain elevation information DB for storing terrain elevation profiles, and A reception state analyzer for providing a real-time reception state from the at least one transmitter of interest in association with the terrain elevation profile DMB SFN operating system comprising a. The method of claim 2, The SFN analysis device, A memory for backing up the reception state analysis information More, The reception state analyzer provides a reception state of the DMB signal according to the backup reception state analysis information in response to a reproduction request from a user. DMB SFN operating system characterized in that. The method of claim 1, The reception quality information is At least one of transmitter identification information (TII) information, channel impulse response (CIR) information, bit error rate (BER) information, field strength information, and GPS-based time and location information DMB SFN operating system characterized in that. The method of claim 5, The SFN monitoring device, A GPS receiver for generating the time or the position information based on a global positioning system (GPS); A test receiver for generating the TII information, the CIR information, and the BER information for a signal from each transmitting station; And An electric field strength meter for generating the electric field strength information for signals from each transmitting station DMB SFN operating system comprising a. The method of claim 6, The SFN monitoring device, An oscilloscope for generating CIR data corresponding to the CIR information generated in the test receiver by a predetermined time unit DMB SFN operating system, characterized in that it further comprises. The method of claim 1, The reception state analysis information is, Comprising at least one of transmission station identification information, channel state information, signal error information, electric field state information, and receiving point information DMB SFN operating system characterized in that. The method of claim 8, wherein the transmission confirmation information, Of the main ID of each transmitting station, the Sub ID of each transmitting station, the received signal strength of the TII received from each transmitting station, the transmitting station name of each transmitting station, and the distance from the current receiving point to the respective transmitting station. DMB SFN operating system comprising any one or more. The method of claim 8, wherein the channel state information, Generating channel state information comprising at least one of CIR summary data and CIR analog representation data DMB SFN operating system characterized in that. The method of claim 8, wherein the signal error information, DMB SFN operating system, characterized in that generated by analyzing the BER (Bit Error Rate) information for the signal received from each transmitting station. The method of claim 8, wherein the electric field state information, And at least one of a received power, a received field strength, and a spectral waveform for a signal received from each transmitter. The method of claim 8, wherein the reception point information, A date and time at which the DMB signal is received, a longitude and latitude of the point at which the DMB signal is received, a distance from a point at which the DMB signal is received to a transmitting station, and a moving speed of a receiver receiving the DMB signal. DMB SFN operating system, characterized in that. The method of claim 1, The SFN monitoring apparatus generates video data for each DMB signal broadcast from the plurality of transmission stations, The DMB SFN operating system, Video analysis device for generating video analysis information based on the video data More, The display device is to display the generated video analysis information DMB SFN operating system characterized in that. The method of claim 14, The video analysis information, At least one of synchronization information, transport stream packet (TP) information, audio / video frame information, audio / video packetized elementary stream (PES) information, program specific information (PSI) information, clock information, and bitrate information DMB SFN operating system characterized in that. In a system for operating DMB (Digital Multimedia Broadcasting) SFN (Single Frequency Network), Receiving each DMB signal broadcast from a plurality of transmission stations; Measuring a predetermined reception quality with respect to the received DMB signal; Generating reception quality information from the measured reception quality; Analyzing the generated reception quality information to generate reception state analysis information linked to at least one of map information and transmission station information; And Displaying the generated reception state analysis information; Including, The displaying step, Providing a real-time reception state from at least one of the plurality of transmission stations of interest for a current reception point in accordance with respective reception state analysis information for the plurality of transmission stations. DMB SFN operating method characterized in that. The method of claim 16, Generating the reception state analysis information, Maintaining a map information DB for storing the map information; Maintaining a source DB storing each source information for the plurality of sources; Collecting respective reception quality information for the plurality of transmission stations measured from the received DMB signal; And Analyzing the reception quality information to generate reception state analysis information linked to at least one of the map information and the transmission information; DMB SFN operating method comprising a. The method of claim 16, Generating the reception state analysis information, Maintain a terrain elevation information DB that stores terrain elevation profiles Including, The displaying may include providing a real time reception status from the at least one station of interest in association with the terrain elevation profile. DMB SFN operating method characterized in that. The method of claim 16, Generating the reception state analysis information, Backing up the reception status analysis information Including, The displaying may include providing a reception status of a DMB signal according to the backup reception status analysis information according to a playback request of a user. DMB SFN operating method characterized in that. The method of claim 16, The reception quality information is At least one of transmitter identification information (TII) information, channel impulse response (CIR) information, bit error rate (BER) information, electric field strength information, and time or position information DMB SFN operating method characterized in that. The method of claim 16, The reception state analysis information is, Comprising at least one of transmission station identification information, channel state information, signal error information, electric field state information, and receiving point information DMB SFN operating method characterized in that. The method of claim 16, Generating the reception state analysis information, Analyzing transmitter identification information (TII) to generate transmission identification information including any one or more of a main ID, a sub ID, a strength, a transmission name, and a distance to the transmission station; DMB SFN operating method comprising a. The method of claim 16, Generating the reception state analysis information, Analyzing channel impulse response (CIR) information for signals from each transmission station to generate channel state information including at least one of CIR summary data and CIR analog indication data DMB SFN operating method comprising a. The method of claim 16, Generating the reception state analysis information, Generating signal error information by analyzing bit error rate (BER) information for a signal from each transmitting station DMB SFN operating method comprising a. The method of claim 16, Generating the reception state analysis information, Analyzing field strength information for signals from each transmitter to generate field state information including any one or more of received power, received field strength, and spectral waveform; DMB SFN operating method comprising a. The method of claim 16, Generating the reception state analysis information, Analyzing location or time information based on Global Positioning System (GPS) to generate receiving point information including date, time, longitude, latitude, distance to transmitting station, and speed DMB SFN operating method comprising a. The method of claim 16, Generating video data for each DMB signal broadcast from the plurality of transmission stations; Generating video analysis information based on the video data; And Displaying the generated video analysis information. DMB SFN operating method characterized in that it further comprises. The method of claim 27, The video analysis information, At least one of synchronization information, transport stream packet (TP) information, audio / video frame information, audio / video packetized elementary stream (PES) information, program specific information (PSI) information, clock information, and bitrate information DMB SFN operating method characterized in that. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 16 to 28.

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