EP2093907A2 - Digitales Funkgerät - Google Patents

Digitales Funkgerät Download PDF

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Publication number
EP2093907A2
EP2093907A2 EP09152785A EP09152785A EP2093907A2 EP 2093907 A2 EP2093907 A2 EP 2093907A2 EP 09152785 A EP09152785 A EP 09152785A EP 09152785 A EP09152785 A EP 09152785A EP 2093907 A2 EP2093907 A2 EP 2093907A2
Authority
EP
European Patent Office
Prior art keywords
network
signal
radio
transceiver module
transmitter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09152785A
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English (en)
French (fr)
Other versions
EP2093907A3 (de
Inventor
Mauro Fantin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Visionee Srl
Original Assignee
Visionee Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Visionee Srl filed Critical Visionee Srl
Publication of EP2093907A2 publication Critical patent/EP2093907A2/de
Publication of EP2093907A3 publication Critical patent/EP2093907A3/de
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/02—Arrangements for relaying broadcast information
    • H04H20/06—Arrangements for relaying broadcast information among broadcast stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/78—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by source locations or destination locations
    • H04H60/79—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by source locations or destination locations characterised by transmission among broadcast stations

Definitions

  • the invention relates to a digital radio device and a system for the radio broadcasting of content in digital format, formed by a network of such devices.
  • Analog signal radio transmission systems are known where the receiving equipment is tuned to the transmitted channels and receive correctly as long as the signal arrives with an appropriate power or other sources transmitting with the same carrier frequency do not disturb the reception thereof.
  • transmission/repeater nodes which amplify the signal and then repeat it, sometimes also with different carrier frequencies, are distributed throughout the territory.
  • RDS encoding systems which allow an analog receiver tuned to a particular radio station to be able to recognize other frequencies of the same transmitter, so as to tune automatically to the channel with the best signal. This is particularly useful when a receiver which is in movement is moving away from the radio source and approaches another source which transmits with a different carrier frequency.
  • transmitters/repeaters are, however, installed at considerable distances from one another. To ensure the coverage they emit power levels of the order of a few hundred or thousand Watt. Strong electromagnetic emissions are a source of interference and are known to have negative effects on the health of persons.
  • the object of the invention is to alleviate the problem of strong emissions while ensuring good reception of the radio signal broadcast.
  • the first stage is a transceiver module which receives, from the wireless network, the radio signal/information to be broadcast to users and which can also send on the network data and/or information of various kinds, including, for example, the configuration of the transmitter itself.
  • the second stage is a radio transmitter stage and receives from the first stage the data and/or the information so as to transmit it over the air using a digitally encoded radio signal.
  • the wireless network is preferably a network of the HiperLAN mesh type or with an architecture which has similar characteristics.
  • the preference is for a short-range network with broadband radio access, having transmitters capable of covering distances at the most of about ten kilometres and with a maximum irradiated power of about some dozen Watt. These transmitters therefore have limited electromagnetic emission levels.
  • the preferred architecture of the radio broadcasting system envisages the presence of at least a base or master station, having the function of introducing in the network the information/signals/content to be broadcast, and a plurality of repeater stations which receive and re-direct said content to other stations, propagating the chain signal. Therefore, any node of the network, i.e. a device according to the invention, acts as a repeater bridge for the information directed to the following nodes, allowing, in theory, limitless expansion of the connectivity.
  • the invention relates to a system for radio-broadcasting content in digital format, comprising a plurality of devices as described above located at a certain distance from each other so as to form a wireless network.
  • a wireless network Preferably most of the devices, except for the master device (M) which introduces into the network the signal to be transmitted, operates so as to receive said signal from an upstream device, transmit it using a dedicated transmitter within a local area and send it via the wireless network to a downstream device.
  • M master device
  • other signals can also be transmitted and introduced into the network.
  • the transmission network is also easy to implement: the low electromagnetic emission levels due to the low transmission power allow the transmitters to be positioned also in the vicinity of locations which are normally frequented by people, without danger for their health.
  • a device 10 is equipped with a first module/stage 12 and a second module/stage 14 for transmission/modulation, operatively connected to each other. With the module 12 the device 10 forms a wireless network node (e.g. for HiperLAN Mesh networks).
  • a wireless network node e.g. for HiperLAN Mesh networks
  • the module 12 is capable of interconnecting via a field FD, e.g. using a directional MIMO (multiple-input multiple-output) antenna (not shown) with electronic steering, to other modules 12 of the same type present in other devices 10, forming a network NT therewith.
  • the network NT is indicated in Fig. 2 with dot-dash line arrows ( Fig. 2 for the sake of simplicity shows only a few reference numbers).
  • the module 12 receives and extracts data from the network NT and, under the control of a microprocessor MP which manages the decoding and conversion operations, extracts from it information to be sent to the transmission/modulation stage 14, which transmits it via radio.
  • This information is encoded by the module 12 under the control of the processor MP using the prechosen transmission standard, e.g. T-DMB, DAB, DAB+ or the like.
  • the modules 12 may have, associated with them, a cable (but also possibly wireless) network interface, e.g. a network input via a G-ETH card, for the local input of one or more audio/video streams in addition to or in place of those received wirelessly from the network NT. Therefore the module 12 can process and send to the transmitter 14 data received from the network NT and/or data received from the interface E (see broken line arrows in Fig. 1 showing the signal paths).
  • a cable but also possibly wireless
  • a network input via a G-ETH card for the local input of one or more audio/video streams in addition to or in place of those received wirelessly from the network NT. Therefore the module 12 can process and send to the transmitter 14 data received from the network NT and/or data received from the interface E (see broken line arrows in Fig. 1 showing the signal paths).
  • the device 10 is provided, for the selection of the signal path, with suitable signal switching means CM and processing means in the module 12 and/or in the processor MP.
  • a node BD ( Fig. 2 ) stores in a multiplexer the data/signals/information received from several radio sources or stations S1 ... Sn and encodes them generating, with a suitable frame, a data or transport stream TS containing all the programs/contents to be broadcast. Said stream is introduced via the interface E into a device 10, which acts as the master device M (shown in Fig. 2 ). The device M sends using its module 12 the signal TS via the mesh network NT to the other devices 10.
  • the interface E of a device 10 is therefore multifunctional.
  • said interface acts as a collector and input into the network NT for the programs to be transmitted, while for any other device 10 it may be used to introduce an additional channel, in addition to or in place of one of those already contained in the signal TS received wirelessly.
  • FIG. 2 shows introduction of an additional stream X into a given device 10.
  • the stream X is also sent to the nearby device 10.
  • the selection of the signal path of the stream X is performed by the signal switching means CM, which are able to select the signal path of the additional stream X and direct it to the transmitter stage 14 and/or to the wireless data network NT via the transceiver module 12.
  • Fig. 2 shows both the uniform coverage with a homogeneous radial field FF determined by the emission of the transmitter 14 and the directionality which is improved (optionally) by directional antennas with a narrow emission range (hence the broken line arrows) for the modules 12.
  • FF homogeneous radial field
  • each of them is equipped with a GPS module 16.
  • Said module obtains from a satellite a reference clock signal which is useful for synchronizing:
  • the GPS module 16 may provide simultaneously the microprocessor MP with the information relating to the coordinates of the installation location of the device 10, and this data may be sent on the network NT.
  • the device 10 may also be equipped with auxiliary connections for connecting external detection sensors or apparatus (not shown), e.g. thermometers, anemometers, tv cameras, seismographs, etc..
  • auxiliary connections for connecting external detection sensors or apparatus (not shown), e.g. thermometers, anemometers, tv cameras, seismographs, etc..
  • the data stream travelling in the mesh network NT may consist, not only of the data relating to the audio/video channel to be transmitted, but also information as to the configuration and/or operating state of the individual devices 10, and/or data relating to local recordings, such as seismic events or recordings, weather conditions (temperature, wind, humidity), etc., i.e. of the aforementioned external apparatus.
  • a maintenance/installation operator connected via a computer to the mesh network NT can thus configure and diagnose from a single remote location each single device 10 connected and also receive data of various kinds depending on the type of sensor equipment installed and connected to the device 10 or installed on it.
  • the signal switching means CM may be controlled remotely so as to program in a centralized manner the territorial areas covered by the signal TS and/or by the local signals X.
  • the device 10 may be connected to a rechargeable battery ACCU combined with a solar panel SP, which ensures power in the event of absence or a temporary interruption of the connection to the electricity mains. In sunny areas or with an efficient battery, the device 10 may even be independent.
  • a user provided with a special receiver unit RX within the coverage zone FF of the radio signal, can tune into a channel as desired, receiving the signal from the device 10 with the best (closest) signal. Since the transmission is digital and synchronized for each device 10, a movement of the user through zones OV with different superimposed signals does not affect the reception, since it occurs without the receiver having to disconnect and/or reconnect the signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
EP09152785A 2008-02-19 2009-02-13 Digitales Funkgerät Withdrawn EP2093907A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTV20080029 ITTV20080029A1 (it) 2008-02-19 2008-02-19 Dispositivo radio digitale

Publications (2)

Publication Number Publication Date
EP2093907A2 true EP2093907A2 (de) 2009-08-26
EP2093907A3 EP2093907A3 (de) 2011-04-06

Family

ID=40292040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09152785A Withdrawn EP2093907A3 (de) 2008-02-19 2009-02-13 Digitales Funkgerät

Country Status (2)

Country Link
EP (1) EP2093907A3 (de)
IT (1) ITTV20080029A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004038968A1 (en) * 2002-10-24 2004-05-06 The Rail Network, Inc. Transit vehicle wireless transmission broadcast system
US20040107436A1 (en) * 2002-11-29 2004-06-03 Fujitsu Limited Digital broadcast signal distribution system and subscriber terminal
US20050177851A1 (en) * 2002-02-18 2005-08-11 Yuji Murao Mobile communication terminal recognition system and mobile communication terminal recognition method using the system
US20060294550A1 (en) * 2004-12-02 2006-12-28 Funai Electric Co., Ltd. Digital TV broadcast signal receiving system and outdoor appliance used therein
GB2430329A (en) * 2005-08-26 2007-03-21 Cell Metric Ltd Digital broadcast signal repeater systems
US20070091871A1 (en) * 2005-10-26 2007-04-26 Intel Corporation Mesh network portal node and method for bridging in mesh networks

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050177851A1 (en) * 2002-02-18 2005-08-11 Yuji Murao Mobile communication terminal recognition system and mobile communication terminal recognition method using the system
WO2004038968A1 (en) * 2002-10-24 2004-05-06 The Rail Network, Inc. Transit vehicle wireless transmission broadcast system
US20040107436A1 (en) * 2002-11-29 2004-06-03 Fujitsu Limited Digital broadcast signal distribution system and subscriber terminal
US20060294550A1 (en) * 2004-12-02 2006-12-28 Funai Electric Co., Ltd. Digital TV broadcast signal receiving system and outdoor appliance used therein
GB2430329A (en) * 2005-08-26 2007-03-21 Cell Metric Ltd Digital broadcast signal repeater systems
US20070091871A1 (en) * 2005-10-26 2007-04-26 Intel Corporation Mesh network portal node and method for bridging in mesh networks

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ROGER P KARRER ET AL: "Ubiquitous TV Delivery to the Masses" INTELLIGENT PERVASIVE COMPUTING, 2007. IPC. THE 2007 INTERNATIONAL CONFERENCE ON, IEEE, PISCATAWAY, NJ, USA, 11 October 2007 (2007-10-11), pages 155-160, XP031636281 ISBN: 978-0-7695-3006-2 *

Also Published As

Publication number Publication date
ITTV20080029A1 (it) 2009-08-20
EP2093907A3 (de) 2011-04-06

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