DE4308161A1 - System for communication via satellites - Google Patents

System for communication via satellites

Info

Publication number
DE4308161A1
DE4308161A1 DE19934308161 DE4308161A DE4308161A1 DE 4308161 A1 DE4308161 A1 DE 4308161A1 DE 19934308161 DE19934308161 DE 19934308161 DE 4308161 A DE4308161 A DE 4308161A DE 4308161 A1 DE4308161 A1 DE 4308161A1
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Germany
Prior art keywords
station
signal
transmitting station
receiving station
network
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.)
Granted
Application number
DE19934308161
Other languages
German (de)
Other versions
DE4308161C2 (en
Inventor
Michael Dipl Ing Konrad
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.)
Philips Intellectual Property and Standards GmbH
Original Assignee
Philips Patentverwaltung GmbH
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 Philips Patentverwaltung GmbH filed Critical Philips Patentverwaltung GmbH
Priority to DE19934308161 priority Critical patent/DE4308161C2/en
Publication of DE4308161A1 publication Critical patent/DE4308161A1/en
Application granted granted Critical
Publication of DE4308161C2 publication Critical patent/DE4308161C2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18532—Arrangements for managing transmission, i.e. for transporting data or a signalling message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Abstract

The described system for communication via satellites (2) contains at least one transmitting station (1), at least one receiving station (3, 4) and at least one monitoring circuit (B1, B3, B4) to monitor the signal (s) transmitted by a transmitting station (1) via the satellite path and received by a receiving station (3, 4). If this signal (s) is affected by interference, a low-cost alternative path is created by providing at least one network module (C1, C3, C4), - which automatically sets up a communications link between a transmitting station (1) and a receiving station (3, 4) via a switched network (5) when a parameter of the signal (s) assumes critical values, and - which clears down this link when the parameter of the signal (s) assumes uncritical values. <IMAGE>

Description

Die Erfindung betrifft ein System zur Nachrichtenübertra­ gung über Satelliten mit mindestens einer Sendestation, mindestens einer Empfangsstation und mit mindestens einer Überwachungsschaltung zur Überwachung des über die Satel­ litenstrecke von einer Sendestation gesendeten und einer Empfangsstation empfangenen Signals.The invention relates to a system for message transmission via satellite with at least one transmitter station, at least one receiving station and with at least one Monitoring circuit for monitoring the satellite lite route sent from one transmitter station and one Receiving station received signal.

Derartige Übertragungssysteme werden z. B. von Rundfunk­ anstalten benutzt, die Audiosignale untereinander austau­ schen, verteilen oder ausstrahlen müssen.Such transmission systems are e.g. B. from broadcasting used to exchange the audio signals with each other must distribute, distribute or broadcast.

Üblich ist der Fall, daß Audiosignale von einer zentralen Sendestation über einen Satelliten an mehrere Empfangs­ stationen übertragen werden. Die Empfangsstationen trans­ formieren dann das über die Satellitenstrecke empfangene Signal so, daß es über eine Sendeantenne vorbestimmter Reichweite an Rundfunkteilnehmer weitergeleitet werden kann.The usual case is that audio signals from a central Broadcast station via a satellite to multiple receptions stations are transmitted. The receiving stations trans then form the received via the satellite route Signal so that it is predetermined via a transmitting antenna Range to be forwarded to broadcasters can.

Da die Übertragungsqualität von Funkstrecken - insbesonde­ re von Satellitenfunkstrecken - u. a. witterungsabhängig ist, wird zumindest bei den Empfangsstationen das über den Satelliten empfangene Signal ständig überwacht. Nimmt ein Parameter dieses Signals kritische Werte an, werden die Empfangsstationen auf den Empfang über eine andere Satellitenstrecke mit einem anderen Satelliten umgeschal­ tet. Das bedeutet, das das gleiche Signal ständig über zwei Satellitenstrecken übertragen werden muß. Führt die Umschaltung zu keiner Verbesserung des Empfangssignals, muß die Störung in Kauf genommen werden.Because the transmission quality of radio links - especially re of satellite radio links - u. a. depending on the weather is at least at the receiving stations constantly monitors the signal received by the satellite. Takes a parameter of this signal to critical values the receiving stations to receive via another Switched satellite route with another satellite tet. That means that the same signal is constantly sent over two satellite routes must be transmitted. Leads the Switching to no improvement of the received signal, the fault must be accepted.

Die Übertragung über Satellitenfunkstrecken wird deshalb bevorzugt, weil sie die billigste von allen sonst noch denkbaren Möglichkeiten ist. Eine solche Möglichkeit be­ stünde z. B. darin, die zentrale Sendestation über Draht- oder Glasfaserleitungen mit den Empfangsstationen zu ver­ binden. Eine zweite Satellitenfunkstrecke jedoch als Er­ satzstrecke vorzusehen, verursacht Zusatzkosten, die nicht mehr vernachlässigbar sind.The transmission via satellite radio links is therefore preferred because they are the cheapest of them all  conceivable possibilities. Such a possibility would be z. B. in it, the central transmission station via wire or Fiber optic lines to ver with the receiving stations tie. A second satellite radio link, however, as Er Providing a set route causes additional costs that are not are more negligible.

Der Erfindung liegt die Aufgabe zugrunde, ein Nachrichten­ übertragungssystem der beschriebenen Art so zu verändern, daß für den Fall einer Störung der Satellitenstrecke die Nachrichtenübertragung zu den Empfangsstationen über ko­ stengünstige Ersatzkanäle erfolgt.The invention has for its object a news to change the transmission system of the type described that in the event of a fault in the satellite route Message transmission to the receiving stations via ko cost-effective replacement channels.

Diese Aufgabe wird dadurch gelöst, in einem System der eingangs genannten Art mindestens ein Netzmodul vorzuse­ hen, das im BetriebsfallThis is achieved in a system of type mentioned at the beginning of at least one network module hen that in operation

  • - automatisch eine Nachrichtenverbindung zwischen Sende­ station und Empfangsstation über ein Wählnetz herstellt, wenn ein Parameter des Signals kritische Werte annimmt, und- automatically a message connection between send station and receiving station via a dial-up network, when a parameter of the signal takes critical values, and
  • - diese Verbindung automatisch wieder auslöst, wenn der Parameter des Signals unkritische Werte annimmt.- this connection is automatically re-established when the Parameters of the signal assume non-critical values.

Vorteilhaft ist es, die Stationen im Störungsfalle über Kanäle eines ISDN-Netzes zu verbinden. Handelt es sich nämlich bei den zu übertragenden Nachrichten um Audiosi­ gnale, so können Audiocodecs eingesetzt werden, die die Bitrate dieser Signale bis auf 128 kbit/s reduzieren. In diesem Falle sind zur Nachrichtenübertragung von einer Sendestation zu einer Empfangsstation nur zwei Basiskanäle zu belegen und hierfür die Gebühren zu zahlen. Die Kosten für eine erforderliche So-Schnittstelle fallen dabei kaum ins Gewicht.It is advantageous to use the stations in the event of a fault Connect channels of an ISDN network. Is it namely for the messages to be transmitted about Audiosi gnale, so audio codecs can be used that the Reduce the bit rate of these signals to 128 kbit / s. In in this case are for the transmission of messages from one Transmitting station to a receiving station only two basic channels to prove and pay the fees for this. The costs there is hardly any need for a So interface weight.

Sind von einer Sendestation mehrere Empfangsstationen zu versorgen, so ist für eine genügend große Anzahl von Empfangsstationen ein S2M-Anschluß mit 15 gebündelten So- Basisanschlüssen vorteilhafter als einzelne So-Basisan­ schlüsse. Mit einem S2M-Anschluß können von einer Sende­ station gleichzeitig 15 verschiedene Empfangsstationen angerufen werden, wenn die Datenrate von einem Audiocodec auf 128 kbit/s reduziert wird.Are several receiving stations from one transmitting station too supply, is for a sufficiently large number of Receiving stations an S2M connection with 15 bundled So-  Basic connections more advantageous than individual So-Basis conclusions. With a S2M connection you can send from one station 15 different receiving stations at the same time be called if the data rate from an audio codec is reduced to 128 kbit / s.

Anhand des in der Figur dargestellte Ausführungsbeispie­ les soll die Erfindung nun näher erläutert werden.Using the exemplary embodiment shown in the figure The invention will now be explained in more detail.

Die Figur zeigt schematisch ein Nachrichtenübertragungs­ system mit einer Funkstrecke, die über einen Satelliten 2 führt. Das System überträgt Audiosignale s von einer Sen­ destation zu zwei Empfangsstationen 3,4. Die Empfangssta­ tionen leiten die empfangenen Nachrichten über nicht ein­ gezeichnete Sendetürme an Rundfunkteilnehmer weiter.The figure shows schematically a message transmission system with a radio link that leads over a satellite 2 . The system transmits audio signals s from one sensor station to two receiving stations 3, 4 . The receiving stations forward the received messages to broadcasters via transmission towers that are not shown.

Jede der Stationen 1, 3 und 4 verfügt über Antennenschal­ tungen A1, A3 und A4 zum Senden bzw. zum Empfangen der über die Satellitenstrecke laufenden Signale s. Die Sta­ tionen 1, 3 und 4 enthalten auch je einen Audiocodec B1, B3 und B4, der die Audiosignale von der 128 kbit/s-Ebene (ISO/EMPEG-Standard Layer III) auf Ebenen mit höheren Bitraten umcodiert oder umgekehrt.Each of the stations 1 , 3 and 4 has antenna circuits A1, A3 and A4 for sending and receiving the signals s. Stations 1 , 3 and 4 also contain an audio codec B1, B3 and B4, which encodes the audio signals from the 128 kbit / s level (ISO / EMPEG standard Layer III) to levels with higher bit rates or vice versa.

Bestandteil eines jeden Audiocodecs ist unter anderem eine Überwachungsschaltung, die das abgehende oder ankommende Signal auf Bitfehler überwacht. Übersteigt die Bitfehler­ rate z. B. in der Sendestation 1 einen kritischen Wert, gibt die Überwachungsschaltung bzw. der Audiocodec B1 ein Si­ gnal über eine Leitung a1 ab. Entsprechendes gilt für die Überwachungsschaltungen der Audiocodecs B3 und B4 und Leitungen a3 und a4.A component of every audio codec includes a monitoring circuit that monitors the outgoing or incoming signal for bit errors. If the bit error rate exceeds z. B. a critical value in the transmitting station 1 , the monitoring circuit or the audio codec B1 emits a signal via a line a1. The same applies to the monitoring circuits of the audio codecs B3 and B4 and lines a3 and a4.

Das über die Leitung a1 laufende Signal veranlaßt ein Netzmodul C1 über So-Anschlüsse 5a, 5b automatisch die Rufnummer der Empfangsstationen 3 und 4 an eine Vermitt­ lung eines ISDN-Netzes 5 auszusenden. Die Empfangsstatio­ nen 3 und 4 sind ebenfalls über So-Anschlüsse 5c und 5d an das ISDN-Netz 5 angeschlossen.The signal running on the line a1 causes a network module C1 to automatically send the call number of the receiving stations 3 and 4 to a switch of an ISDN network 5 via So connections 5 a, 5 b. The receive stations 3 and 4 are also connected to the ISDN network 5 via So connections 5 c and 5 d.

Ist die Verbindung über das ISDN-Netz aufgebaut, erfolgt die Signalübertragung über die ISDN-Einrichtungen 5a, 5b, 5, 5c, und 5d anstatt über die Antennenschaltungen A1, A2 und A3 und den Satelliten 2. Diese Verbindung bleibt so­ lange bestehen, bis die Bitfehlerrate, die entweder tech­ nische Ursachen haben kann oder witterungsbedingt ist, wieder einen unkritischen Wert angenommen hat. Dann lösen die Netzmodule C1, C3 und C4 die Verbindungen über das ISDN-Netz 5 automatisch aus.If the connection is established via the ISDN network, the signals are transmitted via the ISDN devices 5 a, 5 b, 5 , 5 c, and 5d instead of via the antenna circuits A1, A2 and A3 and the satellite 2 . This connection remains until the bit error rate, which can either have technical causes or is weather-related, has again reached an uncritical value. Then the network modules C1, C3 and C4 automatically trigger the connections via the ISDN network 5 .

Der Aufbau einer Verbindung über das ISDN-Netz kann auch bei den Empfangsstationen 3 und 4 beginnen. Empfängt nur eine Empfangsstation ein gestörtes Signal, wird die Ver­ bindung nur zwischen dieser Station und der Sendestation 1 aufgebaut.The establishment of a connection via the ISDN network can also begin at receiving stations 3 and 4 . If only one receiving station receives a disturbed signal, the connection will only be established between this station and the transmitting station 1 .

Bei mehr als zwei Empfangsstationen kann es sich als ko­ stengünstiger erweisen, statt der einzelnen So-Anschlüsse einen S2M-Anschluß zu verwenden. Ein solcher Anschluß besteht aus 15 gebündelten So-Basisanschlüssen. Mit einem S2M-Anschluß können von der Sendestation 1 gleichzeitig 15 verschiedene Empfangsstationen angerufen werden, die mit den Empfangsstationen 3 und 4 funktionsgleich sind.If there are more than two receiving stations, it may prove to be more cost-effective to use an S2M connection instead of the individual So connections. Such a connection consists of 15 bundled So base connections. With an S2M connection, 15 different receiving stations can be called from the transmitting station 1 at the same time, which have the same function as the receiving stations 3 and 4 .

Claims (4)

1. System zur Nachrichtenübertragung über Satelliten (2) mit mindestens einer Sendestation (1), mindestens einer Empfangsstation (3, 4) und mit mindestens einer Überwa­ chungsschaltung (B1, B3, B4) zur Überwachung des über die Satellitenstrecke von einer Sendestation (1) gesendeten und einer Empfangsstation empfangenen Signals (s), gekennzeichnet durch, mindestens einen Netzmodul (C1, C3, C4), der dafür vorgese­ hen ist,
  • - automatisch eine Nachrichtenverbindung zwischen einer Sendestation (1) und einer Empfangstation (3, 4) über ein Wählnetz (5) herzustellen, wenn ein Parameter des Signals (s) kritische Werte annimmt, und
  • - diese Verbindung wieder auszulösen, wenn der Parameter des Signals (s) unkritische Werte annimmt.
1. System for the transmission of messages via satellite ( 2 ) with at least one transmitting station ( 1 ), at least one receiving station ( 3 , 4 ) and with at least one monitoring circuit (B1, B3, B4) for monitoring the satellite route from a transmitting station ( 1 ) transmitted and a receiving station received signal (s), characterized by, at least one network module (C1, C3, C4) provided for this purpose,
  • - Automatically establish a communication link between a transmitting station ( 1 ) and a receiving station ( 3 , 4 ) via a dial-up network ( 5 ) when a parameter of the signal (s) assumes critical values, and
  • - trigger this connection again when the parameter of the signal (s) assumes non-critical values.
2. System nach Anspruch 1, dadurch gekennzeichnet, daß es sich bei dem Wählnetz (5) um ein ISDN-Netz handelt.2. System according to claim 1, characterized in that the dial-up network ( 5 ) is an ISDN network. 3. System nach Anspruch 2, dadurch gekennzeichnet, daß unter Einsatz eines Audiocodecs (B1, B3, B4) die Ver­ bindung zwischen einer Sendestation (1) und einer Empfangsstation (3, 4) über So-Schnittstellen (5a bis 5d) des ISDN-Netzes erfolgt.3. System according to claim 2, characterized in that using an audio codec (B1, B3, B4) the United connection between a transmitting station ( 1 ) and a receiving station ( 3 , 4 ) via So interfaces ( 5 a to 5 d) of the ISDN network. 4. System nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Verbindung zwischen einer Sendestation (1) und einer Empfangsstation (3, 4) über einen S2M-Anschluß des ISDN-Netzes erfolgt.4. System according to claim 2 or 3, characterized in that the connection between a transmitting station ( 1 ) and a receiving station ( 3 , 4 ) via an S2M connection of the ISDN network.
DE19934308161 1993-03-16 1993-03-16 Satellite communications system Expired - Fee Related DE4308161C2 (en)

Priority Applications (1)

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DE19934308161 DE4308161C2 (en) 1993-03-16 1993-03-16 Satellite communications system

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Application Number Priority Date Filing Date Title
DE19934308161 DE4308161C2 (en) 1993-03-16 1993-03-16 Satellite communications system

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DE4308161A1 true DE4308161A1 (en) 1994-09-22
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511087A1 (en) * 1995-03-25 1996-10-02 Deutsche Telekom Ag Automatic connection replacement method
US5594490A (en) * 1994-05-23 1997-01-14 Cable Services Technologies, Inc. System for distributing video/audio files from central location to a plurality of cable headends
WO1997029556A1 (en) * 1996-02-07 1997-08-14 Lutron Electronics, Co., Inc. Repeater for transmission system for controlling and determining the status of electrical devices from remote locations
EP0817397A1 (en) * 1996-07-04 1998-01-07 Alcatel Espace Method for switching a channel from a first to a second propagation path
ES2119698A1 (en) * 1995-10-02 1998-10-01 Motorola Inc Method and apparatus for providing continuity of communications in a satellite telecommunications system.
WO1999004507A2 (en) * 1997-07-01 1999-01-28 Deutsche Telekom Ag Method and system for controlling the use of satellite transmission capacity in terrestrial networks
US5905442A (en) * 1996-02-07 1999-05-18 Lutron Electronics Co., Inc. Method and apparatus for controlling and determining the status of electrical devices from remote locations
WO2000073922A2 (en) * 1999-06-01 2000-12-07 Cacheflow, Inc. Content delivery system
US7755506B1 (en) 2003-09-03 2010-07-13 Legrand Home Systems, Inc. Automation and theater control system
US7778262B2 (en) 2005-09-07 2010-08-17 Vantage Controls, Inc. Radio frequency multiple protocol bridge
US7889051B1 (en) 2003-09-05 2011-02-15 The Watt Stopper Inc Location-based addressing lighting and environmental control system, device and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7274117B1 (en) 2003-09-05 2007-09-25 The Watt Stopper, Inc. Radio wall switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0618337B2 (en) * 1988-02-23 1994-03-09 日本電気株式会社 Satellite communication system

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5594490A (en) * 1994-05-23 1997-01-14 Cable Services Technologies, Inc. System for distributing video/audio files from central location to a plurality of cable headends
DE19511087B4 (en) * 1995-03-25 2006-04-13 Deutsche Telekom Ag Method and arrangement for automatic connection of replacement connections via the IDSN network in the event of faulty leased lines
DE19511087A1 (en) * 1995-03-25 1996-10-02 Deutsche Telekom Ag Automatic connection replacement method
ES2119698A1 (en) * 1995-10-02 1998-10-01 Motorola Inc Method and apparatus for providing continuity of communications in a satellite telecommunications system.
US5905442A (en) * 1996-02-07 1999-05-18 Lutron Electronics Co., Inc. Method and apparatus for controlling and determining the status of electrical devices from remote locations
WO1997029556A1 (en) * 1996-02-07 1997-08-14 Lutron Electronics, Co., Inc. Repeater for transmission system for controlling and determining the status of electrical devices from remote locations
US5848054A (en) * 1996-02-07 1998-12-08 Lutron Electronics Co. Inc. Repeater for transmission system for controlling and determining the status of electrical devices from remote locations
FR2750820A1 (en) * 1996-07-04 1998-01-09 Alcatel Espace METHOD FOR SWITCHING A CHANNEL FROM A FIRST PROPAGATION PATH TO A SECOND PATH OF PROPAGATION
US5995807A (en) * 1996-07-04 1999-11-30 Alcatel Espace Method of switching a channel from a first propagation path to a second propagation path
EP0817397A1 (en) * 1996-07-04 1998-01-07 Alcatel Espace Method for switching a channel from a first to a second propagation path
WO1999004507A2 (en) * 1997-07-01 1999-01-28 Deutsche Telekom Ag Method and system for controlling the use of satellite transmission capacity in terrestrial networks
WO1999004507A3 (en) * 1997-07-01 1999-05-27 Deutsche Telekom Ag Method and system for controlling the use of satellite transmission capacity in terrestrial networks
US7187926B1 (en) 1997-07-01 2007-03-06 Deutsche Telekom Ag Method and system for controlling the use of satellite transmission capacity in terrestrial networks
WO2000073922A2 (en) * 1999-06-01 2000-12-07 Cacheflow, Inc. Content delivery system
WO2000073922A3 (en) * 1999-06-01 2001-08-16 Entera Inc Content delivery system
US7755506B1 (en) 2003-09-03 2010-07-13 Legrand Home Systems, Inc. Automation and theater control system
US7889051B1 (en) 2003-09-05 2011-02-15 The Watt Stopper Inc Location-based addressing lighting and environmental control system, device and method
US7778262B2 (en) 2005-09-07 2010-08-17 Vantage Controls, Inc. Radio frequency multiple protocol bridge

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