WO2007118348A1 - Procédé et dispositif d'insertion d'informations de commande et procédé et dispositif de mesure - Google Patents

Procédé et dispositif d'insertion d'informations de commande et procédé et dispositif de mesure Download PDF

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Publication number
WO2007118348A1
WO2007118348A1 PCT/CN2006/000674 CN2006000674W WO2007118348A1 WO 2007118348 A1 WO2007118348 A1 WO 2007118348A1 CN 2006000674 W CN2006000674 W CN 2006000674W WO 2007118348 A1 WO2007118348 A1 WO 2007118348A1
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Prior art keywords
measurement
control information
parameter
transmitter
measuring
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PCT/CN2006/000674
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English (en)
Chinese (zh)
Inventor
Xinxi Diao
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Zte Corporation
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Application filed by Zte Corporation filed Critical Zte Corporation
Priority to CN2006800537104A priority Critical patent/CN101401318B/zh
Priority to PCT/CN2006/000674 priority patent/WO2007118348A1/fr
Publication of WO2007118348A1 publication Critical patent/WO2007118348A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks

Definitions

  • Insertion method, device and measurement method device for inserting measurement control information
  • the present invention relates to the field of communications, and more particularly to an apparatus, system and method for inserting measurement control information in a terrestrial digital broadcast single frequency network transport stream. Background technique
  • a single frequency network is that each transmitter distributed in different geographical locations transmits exactly the same symbol at the same frequency and at the same time.
  • the single frequency network is a networking mode of terrestrial digital broadcasting, and the networking mode has high spectrum use efficiency.
  • a digital terrestrial television broadcasting single frequency network based on COFDM Coded Orthogonal Frequency Division Multiplexing
  • COFDM Coded Orthogonal Frequency Division Multiplexing
  • DVB-T/H Digital Video Broadcasting - Terrestial/Handset
  • frequency and time synchronization are through additional dedicated equipment.
  • the reference frequency and the second pulse signal (lpps) are obtained from the GPS satellite.
  • all the cascaded oscillators in each transmitter are driven by the GPS (Global Positioning Systems) reference frequency; and the single frequency of the program source is passed.
  • the transmission adapter must not process the MIP packet, that is, transparently adapt and transmit the TS stream output by the SFN adapter.
  • the MIP contains the transmission parameters of the system, and the synchronization time stamp (STS) and maximum delay parameters are important for synchronization.
  • the delay of transmitting the digital baseband signal in the single frequency network to different transmission points is the same; then transmitting the program code stream to each transmitting station through the primary distribution network (PDN); the single frequency network synchronization system from each transmitting station
  • PDN primary distribution network
  • the time stamp is extracted from the MIP packet of the stream, and the second received pulse signal is compared with the local received second pulse signal, and the code stream is subjected to additional delay adjustment, and then the code stream is sent to the modulator to transmit the signal at a common time to achieve time synchronization.
  • the output of the single-frequency network adapter is a standard MPEG-2 transmission.
  • Many packets form a group to form a giant frame 102 (as shown in Figure 1).
  • Each giant frame consists of n packets, ⁇ Is an integer whose size depends on the number of RS (Reed-Solomon) packets per Super Frame in the DVB-T transmission mode.
  • n is the number of RS packets in each super frame.
  • Multiply by 2k mode n is the number of RS packets in each superframe multiplied by 8.
  • Fig. 1 shows a conventional method of inserting synchronization control parameters.
  • TPS-related information 106 such as: signal modulation mode, layering mode, guard interval, selection of 2k/8k mode, and the like.
  • Patent application US20050037711 "Metrology device for the automatic monitoring of a digital signal broadcast network and a broadcast network including one such metrology device", the method given It is a measuring device that can be inserted into an existing broadcast network, and is used in different parts of a digital broadcast front-end device to a relay device and a terminal device.
  • the working method of the measuring device is to acquire (decompose) the control information from the broadcast stream, monitor the control information, and monitor and report the broadcast content according to the control information.
  • the digital terrestrial television broadcasting system based on C0FDM currently has a series of problems such as insufficient signal coverage, poor reception effect in some overlapping coverage areas, unreliable synchronization mechanism, complicated network coordination and inefficiency, and poor self-recovery capability. Find a technical solution to properly solve these problems.
  • the current single-frequency network networking technology and supporting equipment have become hotter.
  • there is an independent GPS system in addition to the digital TV transmission system, there is an independent GPS system. Once the GPS information is missing, the system will be in a paralyzed state, and manual intervention cannot be saved. This is a very unreliable and unsafe move.
  • each transmitter In order for the single-frequency network to work stably and reliably, each transmitter must coordinate its respective transmit power and signal transmission delay according to the requirements of the received field strength. Due to the geographical environment, urban building distribution, coverage and broadcast transmission conditions, under the premise of ensuring signal coverage, all localities must coordinate network according to their own characteristics, pre-processing signals at the origin to ensure receiving conditions at the receiving end. As far as possible at the receiver The range of capabilities to ensure coverage of the coverage area. Coordination work requires simple, reliable, and emergency self-recovery.
  • Patent application US20050037711 a digital broadcast network measuring device and a broadcast network including a digital signal broadcast network and a broadcast network including one such metrology device
  • a method and apparatus for monitoring control information and signal quality in a broadcast system, but such a device does not address the problem of simultaneous monitoring and coverage monitoring in the case of a single frequency network.
  • the synchronization mechanism used in the existing single-frequency network can only ensure that each transmitting point transmits a broadcast signal synchronously, and cannot measure and control the synchronization quality and coverage quality of the single-frequency network.
  • the existing terrestrial digital broadcasting standard is an open-circuit transmission standard that cannot meet the requirements of closed-loop testing.
  • the technical problem to be solved by the present invention is to provide an insertion method, device, and measurement method and apparatus for inserting measurement control information, which solves the technical problem that the prior art cannot measure and control the synchronization quality and coverage quality of a single frequency network.
  • the present invention provides an insertion method for inserting measurement control information, which comprises: setting a position parameter and a width parameter of a measurement window, and inserting a measurement window, measurement content, and control information into a ground number.
  • the position parameter is used to determine a starting point for performing the measurement
  • the width parameter is used to determine a time interval in which the measurement is performed
  • the measurement content and the control information are used to control the measurement.
  • the above insertion method is characterized in that: the measurement content comprises: a measurement of an arrival time and an arrival time difference of an adjacent transmitter for synchronization analysis and synchronization control of a single frequency network; the control information includes: emission control information And adjacent transmitter information.
  • the above insertion method is characterized in that the measurement content further comprises: measuring a signal strength or a signal power of the proximity transmitter at the measurement device for analyzing coverage quality monitoring of the digital broadcast network; the emission control information
  • the method includes: a signal form to be sent by the transmitter for measurement; the adjacent transmitter information includes: a number of adjacent transmitters to be measured, an identification number of an adjacent transmitter, or a pseudorandom noise code used by a neighboring transmitter, The frequency information used by the transmitter is adjacent.
  • the above insertion method is characterized in that: the measurement content further includes: frequency offset estimation and idle frequency
  • the above insertion method is characterized in that the measurement window, the measurement content and the control information are inserted into the transport stream of the terrestrial digital broadcast single frequency network by one of the following methods: mode 1, the position parameter and the width parameter of the measurement window are As part of the jumbo frame initial packet in the transport stream, the measurement content and control information are inserted into some or all of the jumbo frame initial packets; and in the second method, the position parameter and the width parameter of the measurement window are taken as separate A packet identified by the packet is inserted into the transport stream.
  • the present invention also provides an insertion device for inserting measurement control information, characterized in that it comprises an insertion unit provided in a single frequency network adapter, the insertion unit including an information generation portion and Information writing portion; the information generating portion is configured to implement a code table mapping from a measurement control request to a jumbo frame initial packet format, and the information writing portion is configured to write a code table that conforms to the jumbo frame initial packet format to a jumbo frame initial packet; the information generating portion sets a position parameter and a width parameter of the measurement window, the information writing portion inserts the measurement window, the measurement content, and the control information into a transport stream of the terrestrial digital broadcast single frequency network, thereby
  • the position parameter is used to determine a starting point at which the measurement is to be performed, the width parameter is used to determine a time interval in which the measurement is performed, and the measurement content and control information are used to control the measurement.
  • the present invention also provides a measurement method for performing measurement according to the above insertion method, characterized in that it comprises: acquiring a measurement window from a transport stream of the terrestrial digital broadcast single frequency network. a position parameter, a width parameter, and the measurement content and the control information; determining, by the position parameter, a starting point at which the measurement is performed, and determining, by the width parameter, a time interval in which the measurement is performed, the width of the measurement window Measurements are made within the range based on the measurement content and the control information.
  • the present invention also provides a measuring apparatus for performing measurement according to the above measuring method, which comprises: sequentially connected antenna, multi-band filter bank, multi-band channel, parameter measurement a unit and a measurement control unit, the measurement control unit further connecting the multi-band channel; the measurement control unit acquiring a position parameter, a width parameter, and the measurement of the measurement window from a transport stream of the terrestrial digital broadcast single frequency network Content and the control information; determining, by the position parameter, a starting point at which the measurement is performed, and determining, by the width parameter, a time interval in which the measurement is performed, according to the measurement content and the width of the measurement window Control device for measuring the above measuring device, characterized in that the antenna is a multi-band antenna or a plurality of antenna groups The multi-band antenna combination; the multi-band channel is composed of an ultra-wideband amplifier or a low-noise amplifier; the parameter measuring unit is composed of a baseband processing module, has time domain and frequency domain processing capability, and has signal
  • the present invention also provides a digital broadcast signal monitoring system including the above-mentioned measuring device, which is characterized in that it comprises a two-layer cooperative co-frequency consisting of a primary emission layer and an auxiliary emission layer.
  • a digital broadcast network structure for transmitting the main emission layer is composed of a plurality of main transmitters capable of transmitting electromagnetic waves having the same frequency and covering a certain area; the auxiliary emission layer is composed of a plurality of electromagnetic waves capable of transmitting the same frequency and covering a certain area
  • An auxiliary transmitter is included, and the auxiliary transmitter includes the measuring device, and the measuring device measures a signal transmitted by the main transmitter.
  • the invention has the advantages that: by inserting measurement control information into the TS stream, the invention can accurately and flexibly monitor the synchronization quality and coverage quality of the terrestrial digital broadcast signal, and the transmission time of the transmitter according to the synchronization quality and the coverage quality monitoring result.
  • the dynamic adjustment of the emission intensity ensures the stability and controllability of the terrestrial digital broadcasting system. Even in the event of a GPS receiver failure in some transmitters, the system will still function properly.
  • the present invention provides a system with wide coverage and low network construction cost, real-time monitoring of the security, quality and content of the broadcast signals in the radio broadcast television network, including : 1) Keep abreast of the network operation, find harmful interference signals, and accurately understand the location of the accident; 2) Monitor the broadcast quality (such as level, carrier-to-noise ratio, etc.) and discover the front-end programs. A major abnormality, summary, processing, analysis of monitoring data; 3) patrol monitoring or locked channel monitoring of each set of program content broadcasted by each front-end, timely understanding of the broadcast channel and broadcast program content. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic diagram of a conventional method of inserting a MIP packet in an MPEG-2 TS stream
  • FIG. 2 is a schematic diagram of a method for inserting measurement control information provided by the present invention
  • FIG. 3 is a schematic diagram of a digital broadcast signal measuring apparatus provided by the present invention.
  • 4 is a schematic diagram of an example of inserting a measurement window position and a window width in a DMBTS stream according to the present invention
  • 5 is a schematic diagram of an example of a digital broadcast signal monitoring system provided by the present invention.
  • the insertion of the measurement control signal in the digital broadcast transmission stream can realize the measurement of the signal transmitted by the upper layer broadcast transmitter and the signal transmitted by the broadcast transmitter in the same layer, and the measurement content includes: Time difference of arrival, signal strength, synchronization relationship between transmitters, etc.
  • these transmitters can use the signals transmitted by the upper-layer broadcast transmitters measured by themselves, and the broadcast transmitters in the same layer.
  • the time relationship between the transmitted signal and the transmitter to estimate its own transmission time, to ensure that the work of the single frequency network will not be paralyzed.
  • a system with a wide coverage and low network construction cost is needed to monitor the security, quality and content of the broadcast signals in the radio and television network in real time.
  • These monitoring include: 1) Timely Understand the operation of the network, discover harmful interference signals, and accurately understand the location of the accident; 2) Monitor the quality of the broadcast (such as level, carrier-to-noise ratio, etc.), and discover the significant differences in the broadcast of the front-end programs. State, summarize, process, and analyze monitoring data; 3) Conduct patrol monitoring or lock channel monitoring on each set of program content broadcasted by each front-end, and keep abreast of the broadcasted channels and broadcasted program content.
  • the implementation of the present invention mainly includes three parts: A), B), and C).
  • Part A A method of inserting measurement control information in the MPEG-2 transport stream TS
  • the first step is to determine the representation of the measurement window.
  • the representation of the measurement window includes: a position (parameter) 204 of the measurement window and a width (parameter) of the measurement window 205;
  • the position (parameter) 204 of the measurement window can be expressed by the starting point of the window or by the center point of the window.
  • the measurement window starting point tO is used to indicate the time position 201 of the measurement window;
  • the width of the measurement window (parameter) 205 Indicates the time interval TW (202) for performing the measurement; the second step, determining the position and window size of the measurement window;
  • the position 201 of the measurement window 202 (the starting point t0 of the window) is used relative to the GPS second pulse 104
  • the time t0 is shown, see FIG. 2; t0 can be the time relative to the first few second pulses before the measurement window 202. Generally, t0 is the time relative to the first second pulse before the measurement window 202; the measurement window
  • the width (parameter) 205 represents the time interval TW (202) of the implementation measurement, and the width of the TW (202) may be a part of the total length of one OFDM character, such as the guard interval ⁇ , or an integer multiple of the total length of a 0FDM character. Such as 1 ⁇ N 0FDM characters total length;
  • the third step is to determine the measurement content and measurement control information that need to be inserted.
  • the basic measurements include: Proximity transmitter (the transmitter here can be a transmitter for digital TV broadcasting, or a transmitter for other systems) Time of arrival (T0A: TIME OF ARRIVAL) and time difference of arrival (TD0A: TIME DIFFERENCE) OF ARRIVAL) Measurement; This measurement is used for single frequency network synchronization analysis and synchronous control.
  • Proximity transmitter the transmitter here can be a transmitter for digital TV broadcasting, or a transmitter for other systems
  • Time of arrival T0A: TIME OF ARRIVAL
  • TD0A TIME DIFFERENCE OF ARRIVAL
  • the signal strength or signal power measurement at the measuring device adjacent to the transmitter may be a transmitter of a digital television broadcast or a transmitter of another system
  • the transmitter for analyzing the coverage of the digital broadcast network Quality monitoring (when the transmitters of other systems, such as mobile communication systems operating in the spectrum of the television broadcasting band, are used for measurement, they can be used for coverage quality analysis of the system);
  • the measurement content may further include: a frequency offset estimation, an idle frequency measurement (when measuring a frequency band whose usage is uncertain, the monitoring of the spectrum environment);
  • control information that needs to be sent in order to complete the above measurement content is determined.
  • the basic control information includes: Launch control information.
  • the transmission control information includes: a signal form to be transmitted by the transmitter for measurement, which may be carried by the TS or generated at the transmitter, and the signal forms are identified by coding;
  • the measurement control information includes: adjacent transmitter information, where adjacent transmitters refer to one or more transmitters present in the vicinity of a measurement device or a digital broadcast transmitter with measurement devices, these transmitters are generally Refers to a digital broadcast transmitter, or a transmitter that transmits digital broadcast signals, or other types of transmitters.
  • the proximity transmitter information in the measurement control information includes: the number of adjacent transmitters to be measured, the identification number (ID) of the adjacent transmitter, or the PN (Pseudo Noise Code) code used by the neighboring transmitter, near Frequency point information used by the transmitter;
  • the fourth step is to determine the manner in which the measurement control information is inserted;
  • Measurement control information can be inserted at any position of the grand frame 102 constituting the standard MPEG-2 transport stream,
  • One way to insert is to place the position (parameter) 204 of the measurement window and the width (parameter) 205 of the measurement window as part of the jumbo frame initial package (MIP) 101; the position (parameter) 204 and the measurement window of the measurement window
  • the width (parameter) 205 may be inserted into the measurement control information continuously for each (MIP) 101 as part of the jumbo frame initial packet (MIP) 101, or may be inserted only in the partial jumbo frame initial packet (MIP) 101. Measurement control information.
  • One way to insert is to insert the position (parameter) 204 of the measurement window and the width (parameter) 205 of the measurement window as separate packets with PID into the MPEG-2 transport stream.
  • Part B A device for realizing the insertion of measurement control information
  • a device for implementing measurement control information insertion is composed of a single frequency network adapter to add measurement control information insertion unit.
  • the measurement control information insertion unit includes measurement control information generation and measurement control information writing.
  • the measurement control information generating section implements the code table mapping from the measurement control request to the MIP format, and the code table conforming to the jumbo frame initial packet (MIP) format is written into the jumbo frame initial packet (MIP) during the measurement control information writing process.
  • MIP jumbo frame initial packet
  • Part C A digital broadcast signal measuring device.
  • the digital broadcast signal measuring device is used to measure parameters such as arrival time, signal amplitude, and operating frequency point of the digital broadcast signal at its location.
  • the means for implementing the insertion of the measurement control information inserts the measurement control information into the transport stream TS, and the digital broadcast signal measuring device acquires the measurement control information from the transport stream TS according to the manner provided in the measurement control information (eg, the moment when the measurement is started)
  • the number of transmitters to be measured and the ID of the transmitter are used to obtain the measurement parameters specified in the measurement control information (such as the time difference of arrival of each adjacent transmitter signal, the signal amplitude of each adjacent transmitter, etc.).
  • the digital broadcast signal measuring apparatus includes an antenna 301, a multi-band filter bank 302, a multi-band channel 303, a parameter measuring unit 304, and a measurement control unit 305.
  • the measurement control unit 305 acquires measurement control information in the jumbo frame initial packet (MIP) 101 from the MPEG-2 demultiplexing unit, for example, acquiring a measurement window starting point t0 (201) and a time interval TW (202) for performing measurement;
  • MIP jumbo frame initial packet
  • the measurement control unit 305 performs various measurement control information in the jumbo frame initial packet (MIP) 101. 06 000674 parses and controls the corresponding measurements.
  • MIP jumbo frame initial packet
  • the antenna 301 may be a multi-band antenna, or a multi-band antenna combination composed of multiple antennas, and the multi-band antenna combination may include an antenna of a base station or an access point;
  • the multi-band channel 303 may include an ultra-wideband amplifier, or It consists of a set of optimized design LNAs (Low Noise Amplifiers);
  • the parameter measurement unit 304 is composed of a baseband processing module, which has time and frequency domain processing capabilities, and has the ability to measure parameters such as signal amplitude and arrival time; Strictly synchronized, the parameter measuring unit 304 uses GPS time as a clock.
  • the measurement control unit 305 is composed of a digital processor, and the measurement control unit 305 controls the multi-band channel 303, the parameter measurement unit 304 to enter the corresponding measurement mode, and transmits the measurement result of the parameter measurement unit 304 to the network.
  • One implementation of the digital broadcast signal measuring apparatus is to construct a multi-band channel 303 and a parameter measuring unit 304 using a receiver chip used by a commercial terminal used in the terminal.
  • This implementation can reduce the implementation cost of the digital broadcast signal measuring device and shorten the design time. For example, use the telecommunication device of the mobile TV receiver or use UWB to intercept the search engine front end to construct a multi-band channel 303 and receive and measure the television broadcast signal.
  • the digital broadcast signal measuring device can be integrated or co-located with the digital broadcast transmitter, or can be separately designed and installed separately from the digital broadcast transmitter.
  • the digital broadcast signal measuring device periodically measures the television broadcast signal at its position before receiving the measurement control command, and after the transmitter receives the measurement command, in order to achieve the measurement effect on the signal transmitted by the adjacent transmitter, the local broadcast signal can be turned off. Transmitter whose closing time is consistent with the width of the measurement window;
  • the digital broadcast signal measuring device parses the ID of the measuring device that performs the measurement from the transmission control information (or the ID of the base station on which it is supported), and if the digital broadcast signal measuring device obtains the information for starting the device for measurement, it starts to specify Measuring within the window;
  • Embodiment 1 A measurement control information is inserted in terrestrial digital multimedia television broadcasting (DMB-T).
  • the terrestrial digital multimedia television broadcasting (DMB-T) protocol is based on TDS-0FDM technology, and its physical channel frame structure is shown in Fig. 4.
  • the frame structure is hierarchical, and one basic frame structure is called one signal frame.
  • the frame group is defined as 255 signal frames, and the first frame is defined as the frame group header.
  • the signal frame in the frame group has a unique frame number, the number from 0 to 254, and the signal frame number (FN) is encoded into the frame synchronization PN sequence of the current signal frame.
  • a superframe is defined as a group of frames, and the top layer of the frame structure is called a superframe group.
  • Superframes are numbered, from 0 to the maximum frame group number.
  • Superframe number (SFN) and superframe group number (SFGN) the first frame group header encoded into the superframe Medium.
  • the superframe group number is defined as the calendar date transmitted by the superframe group, and the superframe group is periodically repetitively encoded as a first frame group of one superframe in the downlink superframe group. The first two bytes in the header.
  • PST Pacific Standard Time
  • Beijing time 0:0:0AM the physical channel frame structure is reset and a new superframe group is started.
  • a signal frame consists of two parts: frame synchronization and frame body.
  • the frame synchronization signal uses a Walsh-encoded random sequence to achieve multi-base station identification.
  • Frame synchronization includes preamble, PN sequence, and post-sync.
  • Frame synchronization uses BPSK (Binary Phase Shift Keying) modulation for stable synchronization.
  • the baseband signal of the frame body is an orthogonal frequency division multiplexing (OF) block.
  • An OFDM block can be further divided into guard intervals and a DFT (Discrete Fourier Transform) block, as shown in Figure 4.
  • the DFT block has 3780 samples in its time domain, which are inverse discrete Fourier transforms of 3780 subcarriers in the frequency domain.
  • each digital broadcast signal measuring device obtains an ID number or a PN sequence value used by the neighboring base station before the measurement, and the obtaining may be pre-configured or may be transmitted through the TS stream;
  • the digital broadcast signal measuring device parses the ID of the measuring device that performs the measurement from the transmission control information, (or the ID of the base station on which it is based),
  • the digital broadcast signal measuring device obtains information to start the device for measurement, it starts measuring in a prescribed window
  • the digital broadcast signal measuring device obtains the information of the neighboring base station to start the measurement, in the specified window, the PN sequence indicating its own local transmitter ID is transmitted according to the instruction of the measurement control information, and the PN sequence is received by the proximity measuring device according to The PN sequence measures parameters of interest; 4) The digital broadcast signal measuring device measures the signal amplitude (or power) and the time difference of arrival in a predetermined window 401;
  • One measurement method is to generate the PN sequences by the measuring device according to the PN sequence used by each of the neighboring base stations to be detected in advance, and then use the generated PN sequences to perform correlation operations with the signals received by the measuring device, and output correlation peaks thereof. That is, the arrival time of the signal, the difference between the correlation peaks of different PN sequences is the difference of the arrival time of different transmitters at the measuring device.
  • the arrival time and the time difference of arrival there are several methods for estimating the arrival time and the time difference of arrival, such as the first path method, the centroid method, an estimated time of arrival and the time difference of arrival, using the monitored first path as the arrival time.
  • Embodiment 2 is a digital broadcast signal monitoring system.
  • a two-layer cooperative co-frequency transmitting digital broadcast network structure is composed of a primary transmitting layer 501 and an auxiliary transmitting layer 502.
  • the main emission layer 501 is composed of a plurality of main transmitters capable of transmitting electromagnetic waves having the same frequency and covering a certain area, and the transmitter in the main emission layer may be provided with the digital broadcast signal measuring device according to the present invention, or may not be provided with an invention.
  • Digital broadcast signal measuring device any digital broadcast signal measuring device capable of transmitting electromagnetic waves having the same frequency and covering a certain area, and the transmitter in the main emission layer may be provided with the digital broadcast signal measuring device according to the present invention, or may not be provided with an invention.
  • the auxiliary emission layer 502 is composed of a plurality of auxiliary transmitters capable of transmitting electromagnetic waves having the same frequency and covering a certain area, and the transmitter in the auxiliary emission layer is provided with the digital broadcast signal measuring device of the present invention;
  • the electromagnetic wave emitted by the main transmitter in the main emission layer 501 has a larger coverage area than the electromagnetic wave emitted by the auxiliary transmitter in the auxiliary emission layer 502, such as 502a.
  • the auxiliary transmitter in the auxiliary emission layer 502 there are a plurality of electromagnetic waves emitted by the auxiliary transmitter.
  • electromagnetic waves 502a, 502b, 502c, etc. exist in an area covered by the electromagnetic wave 501a, and there are several digital broadcast signal measuring devices according to the present invention in an area covered by electromagnetic waves emitted by a main transmitter in a main emission layer 501;
  • the electromagnetic wave emitted by the main transmitter in the main emission layer 501 has the same frequency as the electromagnetic wave emitted by the auxiliary transmitter in the auxiliary emission layer 502.
  • the electromagnetic wave emitted by the main transmitter in the main emission layer 501 and the auxiliary in the auxiliary emission layer 502 The electromagnetic waves transmitted by the transmitter carry the same information symbols.
  • One method is to transmit the same broadcast code stream through the distribution network 503 to all the main transmitters in the main transmission layer 501 and all the auxiliary transmitters in the auxiliary transmission layer 502.
  • the auxiliary transmitter and its auxiliary primary transmitter transmit the information symbols transmitted by the primary transmitter through the distribution network 503 in a specific synchronization manner. 6 000674 Go.
  • the distribution network 503 may be a wired network, such as a radio access network (RAN) for cellular mobile communication, a hybrid fiber and cable (HFC) network for cable television, and an all-optical network (such as a passive optical network PON, active).
  • RAN radio access network
  • HFC hybrid fiber and cable
  • APON Optical fiber network
  • power line communication network or wireless network, such as wireless link between cellular base station and repeater, LMDS or satellite link.
  • One implementation of the primary transmitter within the primary transmit layer 501 is the use of terrestrial digital multimedia television broadcast (DMB-T, based on TDS-0FDM technology);
  • DMB-T terrestrial digital multimedia television broadcast
  • One implementation of the primary transmitter within the primary transmit layer 501 is a terrestrial digital broadcast transmitter DVB-T;
  • One implementation of the primary transmitter within the primary transmit layer 501 is a terrestrial digital broadcast transmitter DVB-H;
  • One implementation of the primary transmitter within primary transmit layer 501 is to use a transmitter of a cellular mobile communication base station having broadcast transmission capabilities;
  • the transmitter within the auxiliary transmit layer 502 has the same spectral and coded modulation scheme as the primary transmitter within the primary transmit layer 501;
  • One mode of operation of the measurement system presented in this example is to measure the signal transmitted by the primary transmitter within the primary emission layer 501, which is an innovation of the example, the method of which is - the auxiliary emission layer 502 carries the invention
  • the transmitter of the digital broadcast signal measuring apparatus is in a measurement window carried by the jumbo frame initial packet (MIP) 101 (the position 201 (the starting point t0 of the window) indicated by the position (parameter) 204 of the measurement window, and the width of the measurement window ( In the time interval TW 202) represented by the parameter 205, the amplitude and arrival time (difference) of the signal transmitted by the main transmitter in the main emission layer 501 are measured;
  • MIP jumbo frame initial packet
  • the transmitter ID information carried in the measurement window of the jumbo frame initial packet (MIP) 101 is to be inserted into the measurement window of the main transmitter (with a specific PN)
  • the sequence representation is specified by the primary transmitter transmitting the specified signal form within the measurement window;
  • the width of the measurement window carried by the jumbo frame initial packet (MIP) 101 (parameter)
  • the value of the time interval TW 202 represented by 205 is the total length of a complete 0FDM character.
  • the auxiliary emission layer The transmitter in 502 stops co-transmitting the main transmitting layer, so that the digital broadcast signal measuring device accurately measures the signal transmitted by the main transmitting layer;
  • the digital broadcast signal measuring apparatus according to the present invention in the auxiliary transmitting layer 502 measures the ID information of the main transmitter in the main transmitting layer 501 (indicated by a specific PN sequence) in the measurement window, and the method of measuring is:
  • the broadcast signal measuring device performs a correlation operation with a locally generated PN sequence and a specific PN sequence (with transmitter ID information) transmitted by the main transmitter received by the measuring device, and the output correlation peak is the arrival time of the signal, different PN sequences.
  • the difference in correlation peaks is the difference in arrival time between different transmitters at the measuring device.
  • the measurement results are sent to the digital broadcast signal monitoring center through the distribution network for real-time monitoring of the quality of the radio coverage of the broadcast network.
  • the invention can accurately and flexibly monitor the synchronization quality and coverage quality of the terrestrial digital broadcast signal, and dynamically adjust the transmission time and the emission intensity of the transmitter according to the synchronization quality and the coverage quality monitoring result. It ensures the stability and control of the terrestrial digital broadcasting system. Even in the event of a GPS receiver failure in some transmitters, the system will still function properly.
  • the present invention is applicable to the technical field of terrestrial digital broadcast single frequency networks, and the method of the present invention is equally suitable for other fields in which similar applications exist.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un dispositif d'insertion d'informations de commande et un procédé et un dispositif de mesure. Le procédé d'insertion consiste à définir les paramètres de position et les paramètres de largeur de la fenêtre de mesure; à insérer la fenêtre de mesure; à mesurer le contenu et les informations de commande dans le flux de transport de la diffusion numérique terrestre dans le réseau monofréquence; à utiliser les paramètres de position pour déterminer le point de départ de la mesure; à utiliser les paramètres de largeur pour déterminer la zone temporelle de la meure; et à utiliser le contenu de mesure et les informations de commande pour commander la mesure. Selon l'invention, il est possible de contrôler la qualité de synchronisation et de couverture de façon correcte et flexible par insertion des informations de commande de mesure dans le flux de transport, et de garantir la stabilité et la possibilité de commander le réseau de diffusion numérique terrestre. Même si certains récepteurs GPS sont défectueux, le système peut fonctionner normalement.
PCT/CN2006/000674 2006-04-14 2006-04-14 Procédé et dispositif d'insertion d'informations de commande et procédé et dispositif de mesure WO2007118348A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2006800537104A CN101401318B (zh) 2006-04-14 2006-04-14 插入测量控制信息的插入方法、装置和测量方法、装置
PCT/CN2006/000674 WO2007118348A1 (fr) 2006-04-14 2006-04-14 Procédé et dispositif d'insertion d'informations de commande et procédé et dispositif de mesure

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PCT/CN2006/000674 WO2007118348A1 (fr) 2006-04-14 2006-04-14 Procédé et dispositif d'insertion d'informations de commande et procédé et dispositif de mesure

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WO2007118348A1 true WO2007118348A1 (fr) 2007-10-25

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CN103297153B (zh) * 2012-02-28 2015-12-09 华为技术有限公司 功率测量方法、信号测量方法和设备
US10805821B2 (en) * 2018-02-19 2020-10-13 Qualcomm Incorporated Signaling availability during a measurement window

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050037711A1 (en) * 2001-12-13 2005-02-17 Telediffusion De France Metrology device for the automatic monitoring of a digital signal broadcast network and a broadcast network comprising one such metrology device
CN1678068A (zh) * 2004-04-01 2005-10-05 清华大学 地面数字电视广播的单频网系统及其实现方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050037711A1 (en) * 2001-12-13 2005-02-17 Telediffusion De France Metrology device for the automatic monitoring of a digital signal broadcast network and a broadcast network comprising one such metrology device
CN1678068A (zh) * 2004-04-01 2005-10-05 清华大学 地面数字电视广播的单频网系统及其实现方法

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