JP2007006403A - Radio broadcast repeating apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio broadcast repeating apparatus for surely transporting a radio broadcast from a broadcasting device to a weak-field zone and radio wave dead zone without increasing a frequency of a broadcasting signal and without installing any external antenna on a building. <P>SOLUTION: A radio broadcast repeating apparatus 14 comprises: a control signal processing/detecting section 10 storing a receiver station selecting signal; a conversion signal storage section 17 storing a transmitter station selecting signal; a time difference re-transmission control section 16 for converting a station selecting signal added to a radio broadcast received by a receiving section 9 into said transmitter station selecting signal if the station selecting signal is stored in the control signal processing/detecting section 10; and a transmitting section 15 for transmitting the radio broadcast to which the transmitter station selecting signal is added. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radio broadcast relay apparatus that transmits a radio broadcast from a transmission apparatus to a reception apparatus.

  In recent years, roads have been elevated and buildings such as apartment buildings and facilities have risen, and the conventional strong electric field region has changed to a weak electric field region, and further, the weak electric field region has changed to a radio wave insensitive region. Yes. In such areas, with the deterioration of radio wave propagation conditions, the reception situation of disaster prevention administrative radio broadcasts performed by local governments has deteriorated in each home, and problems such as inability to hear broadcast contents are increasing. Such a situation is a very serious problem in disaster prevention administrative radio broadcasting for the purpose of protecting the lives and property of residents.

  Installation of external antennas to buildings such as houses has been considered effective as a measure to improve radio wave propagation, but new homes and renovation of detached houses are also progressing, making it difficult to install external antennas due to aesthetic issues. Many households show this. Therefore, there is a need for a new radio wave propagation improvement method that replaces the installation of an external antenna.

A method of adding a relay frequency and newly installing a relay station can be considered as a drastic improvement measure rather than individual measures such as installing an external antenna in each building such as a house as described above.
JP-A-5-30051 Japanese Patent Laid-Open No. 5-218888

  However, at the present time when broadcast signals are shifting to digitalization, it is very difficult to obtain new analog broadcast frequencies.

  In consideration of the above-described problems, the present invention ensures that a radio broadcast from a transmitter is transmitted to a weak electric field area and a radio wave insensitive area without increasing the frequency of the broadcast signal and without installing an external antenna in the building. An object of the present invention is to provide a wireless broadcast relay device for transmission.

  In order to solve the above problems and achieve the above object, a wireless broadcast relay apparatus according to the present invention is an apparatus for transmitting a wireless broadcast from a transmission apparatus to a reception apparatus, and an identifier indicating a case where the wireless broadcast should be processed A reception identifier storage unit storing a reception identifier, a transmission identifier storage unit storing a transmission identifier which is an identifier indicating a transmission destination of the wireless broadcast, and an identifier for specifying a reception partner are added Receiving means for receiving the wireless broadcast; determining means for determining whether or not an identifier added to the received wireless broadcast is stored in the reception identifier storage means; and adding to the received wireless broadcast When the determination unit determines that the identifier being stored is stored in the reception identifier storage unit, the identifier added to the received wireless broadcast is transmitted as the transmission identifier. Comprising conversion means for converting the transmission identifier stored in Besshi storage means, obtained by the conversion means, and transmission means for transmitting the radio broadcast the transmission identifier is added.

  The wireless broadcast relay device of the present invention further comprises storage means for storing the received wireless broadcast in a storage medium, and the conversion means adds the transmission identifier to the wireless broadcast stored in the storage medium. By doing so, the identifier added to the received wireless broadcast may be converted into the transmission identifier.

  The transmission identifier storage unit may store a plurality of the transmission identifiers, and the transmission unit may transmit the wireless broadcast to which the transmission identifiers are added at time intervals.

  Further, the reception identifier storage means stores a plurality of the reception identifiers, and the transmission identifier storage means stores a plurality of the transmission identifiers associated with each of the reception identifiers, and the conversion means May convert the identifier added to the received wireless broadcast into the transmission identifier associated with the same reception identifier as the identifier added to the received wireless broadcast.

  Furthermore, it can be realized as a method using characteristic constituent means of the wireless broadcast relay apparatus of the present invention as steps, or as a program for causing a computer to execute these steps. The program can be distributed via a recording medium such as a CD-ROM or a transmission medium such as a communication network.

  The present invention relates to a radio broadcast relay apparatus that reliably transmits a radio broadcast from a transmission apparatus to a weak electric field area and a radio wave insensitive area without increasing the frequency of the broadcast signal and without installing an external antenna in the building. Can be provided.

Embodiments of the present invention will be described below with reference to the drawings.
First, the configuration of the wireless system of this embodiment will be described. FIG. 1 is a block diagram of a wireless system according to the present embodiment. The municipal disaster prevention administrative radio system of the present embodiment is a system that transmits and receives municipal disaster prevention administrative radio broadcasts using one frequency, and as shown in FIG. 1, a parent facility station 5, a radio broadcast relay device 14, and And the door-to-door receiver 18. Wireless broadcasting is audio broadcasting.

  The parent equipment station 5 is a radio broadcast source, and broadcasts the radio broadcast by adding a station selection signal that is an identifier for specifying the receiving party. The parent equipment station 5 includes a wireless transmission / reception unit 2, a communication control unit 3, and an operation unit 4. The communication control unit 3 adds the above-mentioned station selection signal for specifying the receiving party to the radio broadcast by the operation of the operation unit 4 of the person who intends to transmit the radio broadcast, and the radio transmission / reception unit 2 is obtained by the communication control unit 3. The wireless broadcast to which the above-mentioned station selection signal for specifying the receiving party is added is transmitted. For example, as shown in FIG. 2, the parent equipment station 5 transmits a radio broadcast to which one or more of the station selection signals (1) to (5) for specifying the receiving party are added.

  The wireless broadcast relay device 14 is a device that relays the wireless broadcast from the parent equipment station 5 and transmits it to the individual receiver 18. As shown in FIG. 1, the reception antenna 6, the transmission antenna 7, and coaxial switching Unit 8, receiving unit 9, control signal processing / detecting unit 10, voice recording control unit 12, voice recording storage unit 13, transmission unit 15, time difference retransmission control unit 16, and converted signal storage unit 17. It consists of and.

  The reception antenna 6 and the transmission antenna 7 are means for receiving or transmitting a radio broadcast. The coaxial switching unit 8 is a signal switching unit. The receiving unit 9 receives a radio broadcast from the parent equipment station 5. The control signal processing / detecting unit 10 stores one or a plurality of receiving station selection signals that are identifiers indicating when the radio broadcast should be processed, and the station selection signal added to the received radio broadcast is itself Is coincident with any of the stored receiving station selection signals. For example, the control signal processing / detecting unit 10 stores the station selection signal (5) as the receiving station selection signal as described on the left side below the column of the first stage relay station in FIG.

  When the station selection signal added to the received radio broadcast matches one of the reception station selection signals stored in the control signal processing / detection unit 10, the voice recording control unit 12 controls the control signal processing / detection unit 10. If it is determined by the above, the received wireless broadcast is stored in the voice recording storage unit 13 which is a storage medium. The conversion signal storage unit 17 stores one or a plurality of transmission station selection signals that are identifiers indicating the transmission destination of the wireless broadcast. For example, the conversion signal storage unit 17 includes a station selection signal (10) and a station selection signal (11) as the transmission station selection signal, as described on the right side below the first-stage relay station column in FIG. Is remembered.

  The time difference retransmission control unit 16 controls the control signal processing / detection unit when the station selection signal added to the received wireless broadcast matches any of the reception station selection signals stored in the control signal processing / detection unit 10. 10, the transmission station selection signal stored in the converted signal storage unit 17 is added to the radio broadcast stored in the voice recording storage unit 13. Thereby, the time difference retransmission control unit 16 converts the station selection signal added to the received radio broadcast into a transmission station selection signal. The transmission unit 15 transmits the wireless broadcast to which the transmission station selection signal is added, obtained by the time difference retransmission control unit 16.

  The control signal processing / detecting unit 10 is an example of a reception identifier storage unit and a determination unit of the wireless broadcast relay apparatus of the present invention. The conversion signal storage unit 17 is an example of a transmission identifier storage unit of the wireless broadcast relay device of the present invention. The receiving unit 9 is an example of a receiving unit of the wireless broadcast relay device of the present invention. The time difference retransmission control unit 16 is an example of conversion means of the wireless broadcast relay device of the present invention. The transmission unit 15 is an example of a transmission unit of the wireless broadcast relay device of the present invention. The voice recording control unit 12 is an example of storage means of the wireless broadcast relay device of the present invention.

  The control signal processing / detection unit 10 and the conversion signal storage unit 17 are maintenance setting notes for setting or changing various constants (delay time, station selection signal, frequency, etc.) stored therein. PC 11 is connected.

  The wireless broadcast relay device 14 is structurally housed in, for example, a commercially available stainless-steel robust terminal board that is commercially available, and further includes a battery and a charging circuit that can withstand a power outage of 24 hours or more. Is equipped.

Next, the operation of the wireless broadcast relay device 14 will be described.
In the wireless broadcast relay device 14, the receiving unit 9 receives and demodulates the wireless broadcast from the parent equipment station 5 via the reception antenna 6. Next, the control signal processing / detecting unit 10 detects a station selection signal added to the radio broadcast from the parent equipment station 5, and the detected signal is registered in the control signal processing / detecting unit 10 in advance. It is determined whether or not it matches the station selection signal (receiving station selection signal). In the case of the first relay station shown in FIG. 2, the station selection signals added to the radio broadcast from the parent equipment station 5 are the station selection signals (1) to (5), and inside the control signal processing / detecting unit 10 The registered station selection signal (receiving station selection signal) is the station selection signal (5). Therefore, the control signal processing / detecting unit 10 determines that they match.

  When the determination result that they match is obtained as described above, the opening control signal is output to the voice recording control unit 12, and the voice recording control unit 12 that receives the signal outputs the recording start signal to the voice recording storage unit 13. And command to store the received wireless broadcast. The voice recording storage unit 13 records the wireless broadcast from the receiving unit 9 via the voice recording control unit 12.

  Subsequently, when the wireless broadcast is finished, the receiving unit 9 that receives and demodulates the closing signal outputs a closing control signal to the voice recording control unit 12, and the voice recording control unit 12 sends the recording end signal to the voice recording storage unit 13. Output and command to stop recording. Thereby, the recording of the wireless broadcast by the voice recording storage unit 13 is immediately stopped. As a result, the audio recording storage unit 13 stores the audio broadcast as digital data.

  After a predetermined time such as 1 minute has elapsed since the end of the wireless broadcast and the recording, the time difference retransmission control unit 16 converts the audio broadcast recorded as digital data into the audio recording storage unit 13, The transmission station selection signal stored in the converted signal storage unit 17 is added. For example, in the case of the first relay station shown in FIG. 2, the time difference retransmission control unit 16 adds the station selection signal (10) and the station selection signal (11) to the recorded audio broadcast. Thereby, a radio broadcast in which only the station selection signal is converted is obtained. The transmission unit 15 transmits the radio broadcast obtained by the converted signal storage unit 17, that is, the radio broadcast obtained by converting only the station selection signal, from the transmission antenna 7.

  The converted station selection signal (transmission station selection signal) corresponds to the insensitive area of radio waves. In other words, the individual receiver 18 installed in the insensitive area has a station selection signal (10 as a station selection signal indicating a case where a radio broadcast should be received, as described in the first relay station in FIG. 2, for example. ) Is assigned. Thus, when the station selection signal (10) added to the radio broadcast from the radio broadcast relay device 14 matches the station selection signal (10) assigned to the individual receiver 18, the individual reception is performed. The machine 18 reliably receives the radio broadcast of strong radio waves transmitted from the radio broadcast relay device 14. That is, the radio broadcast from the parent equipment station 5 is reliably transmitted to the individual receiver 18. This makes it possible for a person in a radio-insensitive area to hear the radio broadcast from the parent equipment station 5 clearly. Therefore, the radio broadcast relay device 14 can surely hear the radio broadcast from the parent equipment station 5 even if the person is in a radio wave insensitive area, and can reliably transmit important information. There is great expectation for the further improvement of reliability.

  Since the master equipment station 5 and the radio broadcast relay device 14 transmit the radio broadcast using a station selection signal that specifies the other party to receive the radio broadcast, one receiver receives radio from the master equipment station 5. Both the broadcast and the wireless broadcast from the wireless broadcast relay device 14 are not output as sound. That is, since one receiver outputs a radio broadcast sound only once, a person in the vicinity of the receiver does not hear the same content of the radio broadcast a plurality of times and does not feel stress.

  In addition, as shown on the right side of FIG. 2, if a second-stage relay station is provided and the combination method of station selection signals is devised, not only single-stage relay but also multi-stage relay is possible, and dead zones can be eradicated. It becomes possible.

  For example, in the example of the second-stage relay station on the right side of FIG. 2, the station selection signal (11) assigned to the radio broadcast relay device 14 of the second-stage relay station is the station selection signal (11). This coincides with the station selection signal (11) added to the radio broadcast from the radio broadcast relay device 14 of the first stage relay station. Therefore, the radio broadcast relay device 14 of the second-stage relay station on the right side of FIG. 2 performs the same operation as the radio broadcast relay device 14 of the second-stage relay station on the left side of FIG. That is, the radio broadcast relay device 14 of the second stage relay station changes the station selection signal to the station selection signal (12) and transmits the radio broadcast. Since the station selection signal assigned to the individual receiver 18 in the insensitive area of the second-stage relay station is the station selection signal (12), the individual receiver 18 is connected to the radio broadcast relay apparatus 14 of the second-stage relay station. Reliable reception of transmitted strong radio broadcasts. That is, the radio broadcast from the parent equipment station 5 is reliably transmitted to the individual receiver 18 in the insensitive area of the second stage relay station. Thereby, the person in the insensitive area of the second stage relay station can hear the radio broadcast from the parent equipment station 5 clearly.

  As described above, the radio broadcast relay device 14 can improve radio wave propagation from the dead area and the weak electric field area to the strong electric field area in the broadcast radio broadcast. As a result, it is not necessary to install an external antenna, and the problem can be solved very effectively.

  Since the wireless broadcast relay device 14 enables wireless relay with a single wave, it is not necessary to acquire a new relay frequency, which is impossible in practice, and effectively uses the current frequency. It has a feature that can solve the problem. Here, in order to enable wireless relay with a single wave, the wireless broadcast relay device 14 once records the wireless broadcast from the parent equipment station 5 and then retransmits the wireless broadcast at the same frequency as when it was received. To do. That is, time difference rebroadcasting is performed. When performing the multistage relay described above, if there are two usable frequencies, the radio broadcast relay device 14 changes the frequency used at the time of reception and transmission, and records the radio broadcast from the parent equipment station 5. Instead, the radio broadcast may be transmitted to the downstream side only by converting the station selection signal.

  The radio broadcast relay apparatus 14 employs a station selection signal linked to the existing master station equipment, and the receiver 14 installed in each household in a weak electric field area or insensitive area by a call signal conversion function possessed by the apparatus 14 itself. The problem can be solved easily and at a relatively low cost simply by installing the present apparatus 14 without making any individual modifications to 18. Cost-effectiveness can also be expected.

  In addition, when the radio broadcast relay apparatus 14 holds a plurality of transmission station selection signals, the plurality of held transmission station selection signals may not be simultaneously added to the radio broadcast. For example, in the case of the first-stage relay station in FIG. 2, there are a station selection signal (10) and a station selection signal (11) as transmission station selection signals. ) May be added to transmit the wireless broadcast, and after a predetermined time such as 1 minute has elapsed, only the station selection signal (11) may be added to transmit the wireless broadcast. Thereby, when both the receivers to which the station selection signal (10) and the station selection signal (11) are assigned are speakers installed outdoors, when they simultaneously receive a radio broadcast and output sound. An echo phenomenon that may occur can be prevented.

  As shown in FIG. 3, the radio broadcast relay device 14 stores a plurality of receiving station selection signals and stores a plurality of receiving station selection signals associated with each receiving station selection signal. Also good. Thereby, the radio broadcast relay device 14 changes the transmission destination and relays the radio broadcast according to the station selection signal at the time of reception. For example, if the station selection signal added to the radio broadcast from the parent equipment station 5 is the station selection signal (21), the radio broadcast relay device 14 uses the station selection signal (31) and the station selection signal as the station selection signal. (32) is converted into a radio broadcast. On the other hand, if the station selection signal added to the radio broadcast from the parent equipment station 5 is the station selection signal (22), the radio broadcast relay device 14 converts the station selection signal into a station selection signal (35). Send radio broadcasts. Thereby, the originator of the radio broadcast that operates the parent equipment station 5 can specify the final receiver of the radio broadcast and transmit the radio broadcast.

  The wireless broadcast relay device of the present invention is useful as a relay device in a municipal disaster prevention administrative wireless system.

1 is a block diagram of a wireless system including a wireless broadcast relay device 14 that performs single-wave multi-stage time difference retransmission according to a station selection signal conversion system according to an embodiment of the present invention The figure which shows the outline | summary of the radio broadcast relay apparatus 14 which performs a single wave multistage connection time difference re-transmission by a station selection signal conversion system The figure which shows the some receiving station selection signal and the some transmitting station selection signal matched with each receiving station selection signal

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission / reception antenna 2 Wireless transmission / reception part 3 Communication control part 4 Operation part 5 Parent station equipment 6 Reception antenna 7 Transmission antenna 8 Coaxial switching part 9 Reception part 10 Control signal processing / detection part 11 Maintenance setting notebook PC
DESCRIPTION OF SYMBOLS 12 Voice recording control part 13 Voice recording storage part 14 Radio broadcast relay apparatus which performs single wave multistage connection time difference retransmission by a station selection signal conversion system 15 Transmitter 16 Time difference retransmission control part 17 Conversion signal storage part 18 Door-to-door receiver

Claims (4)

A wireless broadcast relay device that transmits a wireless broadcast from a transmission device to a reception device,
A reception identifier storage means for storing a reception identifier which is an identifier indicating a case where the wireless broadcast is to be processed;
Transmission identifier storage means for storing a transmission identifier that is an identifier indicating a transmission destination of the wireless broadcast;
Receiving means for receiving the wireless broadcast to which an identifier for identifying a receiving party is added;
Determination means for determining whether or not an identifier added to the received wireless broadcast is stored in the reception identifier storage means;
When the determination unit determines that the identifier added to the received wireless broadcast is stored in the reception identifier storage unit, the identifier added to the received wireless broadcast is the transmission identifier. Conversion means for converting to the transmission identifier stored in the storage means;
A wireless broadcast relay apparatus comprising: transmission means for transmitting the wireless broadcast to which the transmission identifier is added, obtained by the conversion means. And further comprising storage means for storing the received wireless broadcast in a storage medium,
2. The radio according to claim 1, wherein the conversion unit converts the identifier added to the received radio broadcast into the transmission identifier by adding the transmission identifier to the radio broadcast stored in the storage medium. Broadcast relay device. The transmission identifier storage means stores a plurality of the transmission identifiers,
The radio broadcast relay apparatus according to claim 1, wherein the transmission unit transmits the radio broadcast to which each transmission identifier is added at time intervals. The reception identifier storage means stores a plurality of the reception identifiers,
The transmission identifier storage means stores a plurality of the transmission identifiers associated with each reception identifier,
The conversion means converts an identifier added to the received wireless broadcast into the transmission identifier associated with the same reception identifier as the identifier added to the received wireless broadcast. The wireless broadcast relay device described.

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