DE2651836A1 - Radio communications system with fixed and mobile stations - uses different bit sequences for synchronisation blocks from master and mobile stations - Google Patents

Radio communications system with fixed and mobile stations - uses different bit sequences for synchronisation blocks from master and mobile stations

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Publication number
DE2651836A1
DE2651836A1 DE19762651836 DE2651836A DE2651836A1 DE 2651836 A1 DE2651836 A1 DE 2651836A1 DE 19762651836 DE19762651836 DE 19762651836 DE 2651836 A DE2651836 A DE 2651836A DE 2651836 A1 DE2651836 A1 DE 2651836A1
Authority
DE
Germany
Prior art keywords
mobile stations
stations
radio
radio station
block
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
DE19762651836
Other languages
German (de)
Other versions
DE2651836C2 (en
Inventor
Werner Kuehl
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19762651836 priority Critical patent/DE2651836C2/en
Publication of DE2651836A1 publication Critical patent/DE2651836A1/en
Application granted granted Critical
Publication of DE2651836C2 publication Critical patent/DE2651836C2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
    • H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
    • H04W56/007—Open loop measurement
    • H04W56/0075—Open loop measurement based on arrival time vs. expected arrival time
    • H04W56/0085—Open loop measurement based on arrival time vs. expected arrival time detecting a given structure in the signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2678—Time synchronisation
    • 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
    • H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals

Abstract

The radio communications system, with fixed and mobile stations, uses different bit frequency for the synchronisation blocks of data telegrams from the master fixed station and the mobiles so that the slave fixed station can distinguish between them. The sync. block of th master station has the form 11110100 and that of the mobiles 11110010. This avoids the need to alter the block structure of the data telegram.

Description

"Verfahren zur Übertragung von Informationen" "Procedure for the transmission of information"

Die Erfindung betrifft ein Verfahren zur Übertragung von Informationen zwischen einer ersten und einer zweiten Funkstelle mit Hilfe von Datentelegrammen mit einen Synchronisationsblock.The invention relates to a method for transmitting information between a first and a second radio station with the help of data telegrams with a synchronization block.

Bei Funkmeldesysteuen der Sicherheitsbehörden beispielsweise sind Übertragungen von Datentelegrammen von Fahrzeugen zur Leitstelle und in umgekehrter Richtung erforderlich, wobei in die Funknetz weitere Stationen, sogenannte Revierstationen, integriert sind, die die Datentelegramme unter Unterscheidung der jeweiligen Übertragungsrichtung ebenfalls empfangen sollen.In the case of radio reporting systems of the security authorities, for example Transmission of data telegrams from vehicles to the control center and vice versa Direction required, with further stations in the radio network, so-called district stations, integrated which are the data telegrams, differentiating the respective direction of transmission should also receive.

Da die Telegrammstruktur für beide Übertragungsrichtungen gleich ist, ist es für die Revierstationen nicht ohne weiteres möglich, den zum jeweils übertragenen Datentelegramm gehörenden Absender (Fahrzeug oder Leitstelle) zu erkennen.Since the telegram structure is the same for both directions of transmission, it is not easily possible for the district stations to transfer the data to the respective Recognize the sender belonging to the data telegram (vehicle or control center).

Es sind zwar bereits verschiedene Zeichenfolgen für die Blocksynchronisation bekannt, bislang noch nicht bekannt ist aber die Verwendung unterschiedlicher Synchronisationsblöcke innerhalb eines geschlossenen Informationsübertragungssystems -zur Kennzeichnung der Informationsquelle bzw. der Übertragungsrichtung.There are already different character strings for block synchronization known, but not yet known, is the use of different synchronization blocks within a closed information transmission system - for identification the information source or the direction of transmission.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu schaffen, das es ohne Änderung der Telegrammlänge und des blockmäßigen Aufbaus der Datentelegramme dritten Funkstellen (Revierstationen) ermöglicht, die jeweilige Übertragungsrichtung bzw. Datenquelle zu erkennen.The invention is based on the object of a method of the above mentioned type to create that it without changing the telegram length and the block-like Structure of the data telegrams third radio stations (district stations) enables the to recognize the respective transmission direction or data source.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß zur Unterscheidung der Datentelegramme der ersten Funkstelle von denjenigen der zweiten Funkstelle durch eine dritte Funkstelle für die Bynchronisationsblöcke der Datentelegramme der ersten und der zweiten Funkstelle unterschiedliche Bitfolgen verwendet werden.According to the invention, this object is achieved in that, for the purpose of differentiation of the data telegrams of the first radio station from those of the second radio station by a third radio station for the synchronization blocks of the data telegrams different bit sequences are used for the first and second radio stations.

Bei einer bevorzugten Ausgestaltungsform wird die erste Funkstelle als Leitstelle in einem Funknetz mit mehreren zweiten Funkstellen, vorzugsweise mobilen Fahrzeugstationen, sowie mehreren dritten Funkstellen, vornehmlich ortsfesten Revierstationen, verwendet. Dabei weist der Block-Synchronisationsblock der Datentelegramme der ersten Funkstelle die Bitfolge 11110100, der Block-Synchronisationsblock der Datentelegramme der zweiten Funkstelle/Funkstellen dagegen die Bitfolge 11110010 auf.In a preferred embodiment, the first radio station is as a control center in a radio network with several second radio stations, preferably mobile vehicle stations, as well as several third radio stations, mainly stationary Territory stations, used. The block synchronization block has the data telegrams of the first radio station the bit sequence 11110100, the block synchronization block of the Data telegrams from the second radio station / radio stations, on the other hand, have the bit sequence 11110010 on.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird ii folgenden näher erläutert.An embodiment of the invention is shown in the drawing and is explained in more detail below.

Fig. 1 zeigt ein Funknetz mit einer ersten Funkstelle 1 als Leitstelle, mehreren - als Fahrzeugstationen ausgebildeten -zweiten Funkstellen 2 bis 2" und einigen dritten Funkstellen 3 bis 3" als ortsfesten Revierstationen. Zwischen der Leitstelle und einer der Fahrzeugstationen findet gerade - wie durch die gestrichelten Pfeile angedeutet - ein Inforsationsaustausch statt, wobei die ausgetauschten Inforiationen zugleich von den Revierstationen empfangen werden. Die Informationen werden in Form von Datentelegrammen übertragen beispielsweise mit dem in Fig. 2 dargestellten Blockaufbau mit einem Vorlauf 4, einem Block für die Blocksynchronisation 5, einem Nutzinforaationenblock 6, einem Redundanzblock 7 und einem Schlußbit 8. Um den Revierstationen eine Identifizierung der jeweiligen Datenquelle bzw. der Übertragungsrichtung zu ermöglichen, wird der Block zur Blocksynchronisation 5 bei den Datentelegramoen der Leitstelle aus einer anderen Folge binärer Zeichen aufgebaut als derjenige bei den Datentelegrammen der Fahrzeugstationen, wobei generell die Telegramilänge und der blockmäßige Aufbau der Datentelegramme beider Richtungen unverändert bleiben und gleich sind. So wird beispielsweise dem Synchronisationsblock 5 bei den Datentelegrammen der Leitstelle die Bitfolge 11110100 zugeordnet, dem Synchronisationsblock 5 der Datentelegramme, die von einer Fahrzeugstation ausgesendet werden, dagegen die Bitfolge 11110010.Fig. 1 shows a radio network with a first radio station 1 as a control center, several - designed as vehicle stations - second radio stations 2 to 2 "and some third radio stations 3 to 3 "as fixed district stations. Between the Control center and one of the vehicle stations is just taking place - as indicated by the dashed line Arrows indicated - an exchange of information takes place, whereby the exchanged information can be received by the district stations at the same time. The information is in the form of data telegrams are transmitted with the block structure shown in FIG. 2, for example with a lead 4, a block for block synchronization 5, a useful information block 6, a redundancy block 7 and a tail bit 8. To identify the district stations the to enable the respective data source or the direction of transmission, becomes the block for block synchronization 5 in the data telegrams of the control center made up of a different sequence of binary characters than that of the data telegrams of the vehicle stations, whereby generally the telegram length and the block-like structure of the data telegrams in both directions remain unchanged and are the same. So will for example the synchronization block 5 in the data telegrams of the control center the bit sequence 11110100 assigned to the synchronization block 5 of the data telegrams, which are transmitted by a vehicle station, on the other hand the bit sequence 11110010.

Der Grundgedanke der vorliegenden Erfindung ist darin zu sehen, daß innerhalb eines geschlossenen Informationssystems voneinander verschiedene Zeichenfolgen für die Blocksynchronisation verwendet werden. Dieses ermöglicht in vorteilhafter Weise die Erkennung der Übertragungarichtung - insbesondere auch der Datenquelle -, ohne daß der Informationsteil der Datentelegrarme erweitert werden müßte. Gleiche binäre Bitfolgen in Nutzinforiationsblock 6 der Datentelegramme können daher auch je nach Übertragungsrichtung (bzw. Datenquelle) verschiedene Bedeutung, z. B. einerseits die einer Meldung und andererseits die einer Anweisung, haben. Als weiterer Vorteil kommt hinzu, daß noch vor dem Einlauf der eigentlichen Information der zugehörige Speicher oder Verarbeitungsweg bekannt ist und auch durchgeschaltet wird.The basic idea of the present invention is to be seen in that different character strings within a closed information system used for block synchronization. This allows in more advantageous Way the detection of the transmission direction - especially the data source - without the information part of the data telegram having to be expanded. Same binary bit sequences in useful information block 6 of the data telegrams can therefore also depending on the direction of transmission (or data source) different meaning, e.g. B. on the one hand that of a message and, on the other hand, that of an instruction. Another advantage there is also the fact that before the actual information is received, the associated Memory or processing path is known and is also switched through.

LeerseiteBlank page

Claims (3)

Patentansprüche 1. Verfahren zur Übertragung von Informationen zwischen einer eraten und einer zweiten Funkstelle mit Hilfe von Datentelebrammen mit einem Synchronisationsblock, dadurch gekennzeichnet, daß zur Unterscheidung der Datentelegramme der ersten Funkstelle (1) von denjenigen der zweiten Funkstelle (2, 2' oder 2") durch eine dritte Funkstelle (3, 3' oder 3") für die Synchronisationsblöcke (5) der Datentelegramme der ersten und der zweiten Funkstelle unterschiedliche Bitfolgen verwendet werden (Fig. 1 und 2). Claims 1. Method for transferring information between one eraten and a second radio station with the help of data celebrams with one Synchronization block, characterized in that to differentiate between the data telegrams of the first radio station (1) from those of the second radio station (2, 2 'or 2 ") by a third radio station (3, 3 'or 3 ") for the synchronization blocks (5) the data telegrams of the first and the second radio station have different bit sequences can be used (Figs. 1 and 2). 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die erste Funkstelle (1) als Leitstelle in einem Funknetz mit mehreren zweiten Funkstellen (2 bis 2"), vorzugsweise mobilen Fahrzeugstationen, sowie mehreren dritten Funkstellen (3 bis 3"), vornehmlich ortsfesten Revierstationen, verwendet wird (Fig. 1).2. The method according to claim 1, characterized in that the first Radio station (1) as a control center in a radio network with several second radio stations (2 to 2 "), preferably mobile vehicle stations, as well as several third radio stations (3 to 3 "), mainly stationary district stations, is used (Fig. 1). 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Synchronisationsblock (5) der Datentelegramme der ersten Funkstelle (1) die Bitfolge 11110100, der Synchronisationsblock (5) der Datentelegramme der zweiten Funkstelle/Funkstellen (2 bis 2) dagegen die Bitfolge 11110010 aufweist (Fig. 1 und 2).3. The method according to claim 1 or 2, characterized in that the Synchronization block (5) of the data telegrams of the first radio station (1) the bit sequence 11110100, the synchronization block (5) of the data telegrams of the second radio station / radio stations (2 to 2), on the other hand, has the bit sequence 11110010 (Fig. 1 and 2).
DE19762651836 1976-11-13 1976-11-13 Method of transferring information Expired DE2651836C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
DE19762651836 DE2651836C2 (en) 1976-11-13 1976-11-13 Method of transferring information

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DE2651836A1 true DE2651836A1 (en) 1978-05-18
DE2651836C2 DE2651836C2 (en) 1986-03-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171433A1 (en) * 1984-02-15 1986-02-19 Identification Devices Inc Identification system and transponder therefor.
WO1990009073A1 (en) * 1989-01-27 1990-08-09 British Telecommunications Public Limited Company Telecommunications system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3585598A (en) * 1969-07-24 1971-06-15 Amp Inc Alphanumeric,variable word length,channel scanning selective signalling system
DE2112371A1 (en) * 1970-04-21 1971-11-04 Ibm Method for the switching of messages within a network
US3641274A (en) * 1968-10-11 1972-02-08 Kokusai Denshin Denwa Co Ltd Synchronization system for communication information in pcm time division multiple access communication system
US3769587A (en) * 1971-10-19 1973-10-30 Nippon Electric Co Synchronizing system for phase-modulation telecommunication system
US3806879A (en) * 1971-08-11 1974-04-23 Communications Satellite Corp Tdma satellite communication system with multi-pcm frames per tdma frame

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641274A (en) * 1968-10-11 1972-02-08 Kokusai Denshin Denwa Co Ltd Synchronization system for communication information in pcm time division multiple access communication system
US3585598A (en) * 1969-07-24 1971-06-15 Amp Inc Alphanumeric,variable word length,channel scanning selective signalling system
DE2112371A1 (en) * 1970-04-21 1971-11-04 Ibm Method for the switching of messages within a network
US3806879A (en) * 1971-08-11 1974-04-23 Communications Satellite Corp Tdma satellite communication system with multi-pcm frames per tdma frame
US3769587A (en) * 1971-10-19 1973-10-30 Nippon Electric Co Synchronizing system for phase-modulation telecommunication system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0171433A1 (en) * 1984-02-15 1986-02-19 Identification Devices Inc Identification system and transponder therefor.
EP0171433A4 (en) * 1984-02-15 1988-01-07 Identification Devices Inc Identification system and transponder therefor.
WO1990009073A1 (en) * 1989-01-27 1990-08-09 British Telecommunications Public Limited Company Telecommunications system
EP0383447A1 (en) * 1989-01-27 1990-08-22 BRITISH TELECOMMUNICATIONS public limited company Telecommunications system

Also Published As

Publication number Publication date
DE2651836C2 (en) 1986-03-06

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