DE1050842B

DE1050842B -

Info

Publication number: DE1050842B
Application number: DENDAT1050842D
Authority: DE
Publication date: 1959-02-19

Description

Die Erfindung betrifft eine Anordnung für die Abzweigung und die Einführung von Impulskanälen in Anlagen der Zeitmultiplexübertragung, bei welcher an der Abzweigstelle ein Summenkanal ausgesendet wird, der aus ankommenden und neu eingeführten Einzelkanälen besteht.The invention relates to an arrangement for branching off and introducing pulse channels in Systems of time division multiplex transmission in which a sum channel is sent out at the branch point consisting of incoming and newly introduced individual channels.

Es ist bekannt, derartige Einrichtungen in Relaisstationen drahtloser Richtverbindungen anzuordnen. An solchen Zwischenstationen besteht vielfach die Aufgabe, einzelne Nachrichtenkanäle eines ankommenden Summenkanals abzuzweigen und an deren Stelle neue Nachrichtenkanäle in den abgehenden Summenkanal einzufügen. In bekannter Weise wird diese Aufgabe dadurch gelöst, daß die zur Abzweigung vorgesehenen Kanäle an der Relaisstelle demoduliert und ausgeblendet werden. Die Ausblendeeinrichtung ist der Demodulationseinrichtung nachgeordnet. Aus dem Synchronimpuls des ankommenden Summenkanals werden Impulse abgeleitet, die eine entgegengesetzte Polarität aufweisen und deren Phasenlage an Laufzeitgliedern verändert wird. Die Phasenänderung ist dabei so gewählt, daß die Abzweigimpulse unterdrückt werden. In dem Summenkanal entstehen somit Impulslücken, wobei die noch vorhandenen Impulse der übrigen Nachrichtenkanäle nicht mehr äquiclistant sind. Es besteht nun die Möglichkeit, die ausgeschiedenen Impulse durch neue Impulse mit gleicher Phasenlage und neuem Modulationsinhalt zu ersetzen. Bei bekannten Anlagen werden aus dem Synchronimpuls des ankommenden Summenkanals neue Impulsfolgen mit der Frequenz der ausgeschiedenen Impulse abgeleitet und durch die zugeführten niederfrequenten Nachrichten moduliert. Die neugebildeten Nachrichtenkanäle bilden die Ergänzung des abgehenden Summenkanals, dessen Impulsfrequenz mit derjenigen des ankommenden S um ineηkana 1 s übereinstimmt.It is known to arrange such devices in relay stations of wireless directional connections. At such intermediate stations there is often the task of individual communication channels of an incoming Branch off sum channel and in their place new message channels in the outgoing Insert sum channel. In a known manner, this object is achieved in that the branch provided channels are demodulated and masked at the relay point. The masking device is arranged downstream of the demodulation device. From the sync pulse of the incoming Sum channel pulses are derived, which have an opposite polarity and their Phase position is changed on delay elements. The phase change is chosen so that the branch pulses be suppressed. Pulse gaps thus arise in the sum channel, whereby the existing impulses of the other communication channels are no longer equiclistant. There is now the Possibility of replacing the eliminated impulses with new impulses with the same phase position and new modulation content to replace. In known systems, the synchronous pulse of the incoming Sum channel derived new pulse trains with the frequency of the excreted pulses and through the supplied low-frequency messages are modulated. The newly formed news channels make up the Completion of the outgoing sum channel, whose pulse frequency matches that of the incoming one S to ineηkana 1 s matches.

Diese bekannte Einrichtung hat den Nachteil, daß die Impulse der Abzweigkanäle nicht ausgeschieden, sondern in Röhren-Koinzidenzschaltungen lediglich unterdrückt werden. Daraus ergeben sich ,Störeinflüsse für die Nachbarkanäle, wenn die Betriebswerte der Röhren vom Sollwert abweichen. Ferner kann bei Ausfall des ankommenden Summenimpulses oder einer Koinzidenzschaltung der Betrieb einer Abzweigstelle nicht aufrechterhalten werden.This known device has the disadvantage that the pulses of the branch channels are not eliminated, but can only be suppressed in tube coincidence circuits. This results in interference for the adjacent channels if the operating values of the tubes deviate from the setpoint. Furthermore, at Failure of the incoming sum pulse or a coincidence circuit, the operation of a branch point cannot be sustained.

Diese Nachteile werden vermieden, indem er fin dungsgemäß eine Trennstufe vorhanden ist, die aus dem ankommenden Summenkanal die Synchronisierimpulse ableitet, daß ferner ein Verteiler vorhanden ist, der die ankommenden Kanalimpulsfolgen auf die Einzelkatiäle verteilt, daß ein Impulsgenerator vorgesehen ist, der eine neue, zunächst umuodulierte Summenimpulsfolge erzeugt, die in Frequenz und Anordnung für die Abzweigung
und die Einführung von Impulskanälen
in Anlagen der ZeitmultiplexübertragungThese disadvantages are avoided by providing a separation stage that derives the synchronization pulses from the incoming sum channel, that there is also a distributor that distributes the incoming channel pulse trains to the individual channels, that a pulse generator is provided, which initially generates a new one umodulated sum pulse sequence generated, the frequency and arrangement for the branch
and the introduction of impulse channels
in time division multiplex transmission systems

Anmelder:Applicant:

Telefunken G.m.b.H.,Telefunken G.m.b.H.,

Berlin NW 87, Sickingenstr. 71Berlin NW 87, Sickingenstr. 71

— -

Dipl.-Ing. Helmut Oberbeck, Backnang (Württ.),
ist als Erfinder genannt wordenDipl.-Ing. Helmut Oberbeck, Backnang (Württ.),
has been named as the inventor

22

Phase durch den abgezweigten Synchronisierimpuls synchronisiert wird und aus der ein neuer Synchronisierimpuls abgeleitet und einem neuen Summenkanal zugeführt wird und aus der die Kanalimpulse abgezweigt und auf neue Einzelkanäle verteilt werden, daß den neuen Einzelkanälen Modulationscinrichtungen zugeordnet sind, durch die ausgewählte Einzelkanalimpulsfolgen moduliert werden, und daß Durch-Schalteeinrichtungen vorgesehen sind, durch die ausgewählte Einzelkanalimpulsfolgen des ankommenden Sumrnenkanals und ausgewählte Einzelkanalimpulsfolgen der neuen Kanäle. derart zusammengeschaltct werden, daß eine neue Summeiikanalimpulsfolge entsteht, deren Frequenz gleich der Frequenz der Summenimpulsfolgc des ankommenden Summenkanals ist.Phase is synchronized by the branched synchronization pulse and from which a new synchronization pulse derived and fed to a new sum channel and from which the channel pulses are branched off and distributed to new individual channels that the new individual channels modulation devices are assigned, are modulated by the selected single-channel pulse trains, and that through-switching devices are provided through the selected individual channel pulse trains of the incoming Sumrnenkanal and selected individual channel pulse trains of the new channels. are interconnected in such a way that a new total channel pulse sequence is created, whose frequency is equal to the frequency of the sum pulse sequence of the incoming sum channel is.

Diese Maßnahme bietet die Möglichkeit, sämtliche Nachrichtenkanäle des ankommenden Summenkanals durch neu eingeführte Nachrichtenkanäle zu ersetzen. Eine Unterdrückung der abgezweigten Nachrichtenkanäle ist dabei nicht erforderlich, da die Möglichkeit besteht, die empfangenen und die neu eingeführten Impulse in beliebiger Weise zu mischen. Die. Erzengung eines vollständigen neuen Summeiikanals an der Abzweigstelle, hat ferner den Vorteil, bei Ausfall des ankommenden Summenkanals diesen vollständig zu ersetzen.This measure offers the possibility of all message channels of the incoming sum channel to be replaced by newly introduced news channels. A suppression of the branched news channels is not required, as it is possible to use the received and the newly introduced Mix pulses in any way. The. Creation of a completely new summing channel on the Branch point also has the advantage that if the incoming sum channel fails, it closes it completely substitute.

An Hand der Zeichnung wird ein Ausführungsbei-5« spiel der Erfindung beschrieben.An exemplary embodiment of the invention is described with reference to the drawing.

Der ankommende Summenkanal S₁ wird der Demodulationszentrale Z₁ und der Trennstufe T zugeführt. Der als Dappelimpuls ausgebildete Synchronimpuls wird in der Trennstufc T mit Hilfe einerThe incoming sum channel S ₁ is fed to the demodulation center Z ₁ and the separation stage T. The synchronous pulse, which is designed as a Dappel pulse, is activated in the isolating stage T with the aid of a

809 750/354809 750/354

Claims

reflective delay chain eliminated and fed to the modulation center Z2 via a phase comparison stage Ph. In this a pulse sequence is generated depending on the sync pulse, the pulse frequency of which corresponds to the frequency of the incoming sum channel S1. A comparison voltage F is derived from the modulation center Z2, which produces a control voltage U (φ) in the phase comparison stage Ph. This control voltage synchronizes the new pulse train with the derived synchronizing pulse. In the demodulation center, the total channel is divided into the five individual channels I to V. These are fed to the demodulation stages D1 to Dv, in which the individual communication channels are demodulated. The demodulated communication channels NPd are branched off at the demodulation stages Di to Dv. If a branched off channel is no longer transmitted, it is connected to one of the terminating resistors R1 to Ry. If one of the channels I to V is to continue to be transmitted, one of the contacts a to e causes the channel to be switched through to the outgoing sum channel S2. In the demodulation center Z2, a pulse is derived from the newly formed pulse sequence and converted into a double pulse in the synchronization stage Sy. This serves as a sync pulse for the outgoing sum channel S2. The remaining pulses from the demodulation center Z2 are distributed to the five individual channels I 'to V, in which the modulators M1 to Mv are arranged. These are also connected to the terminals NFm, via which further communication channels are inserted into the sum channel sent out. The individual channels are inserted through contacts a 'to e. At point m, the message channels supplied by the receiving side and the newly inserted message channels are mixed. The new sum channel S2 is created, the highest pulse frequency of which corresponds to the frequency of the incoming sum channel S1. The sum channel S2 can optionally be composed of the incoming or newly inserted individual channels. The type of composition results from the switching status of contacts a to e and a 'to e. If, for example, the channel I is branched off, the channel Γ corresponding in the time sequence can be switched through to the outgoing sum channel S2. In this case, the branched off channel I is replaced by the newly introduced channel I '. However, there is also the possibility of branching off channel I and simultaneously transmitting it through the outgoing sum channel S2. Channel I is then switched through at contact a, and channel Γ remains blocked by contact a '. The outgoing sum channel can be combined in any way from the individual channels of the incoming or the new channel group to be introduced. The condition here is that the channels corresponding in the time sequence, such as ζ. Β. I and Γ are not switched through to the outgoing sum channel S2 at the same time. In the drawing, the channels are switched through in such a way that the sum channel S2 is formed from the individual channels I ', II, III, IV and V. The channels can be switched through by electronic or electromechanical means. The corresponding in the time sequence channels such. B. I and Γ can be switched 'a' and blocked 'a' at the same time. Patent claims:

1. Arrangement for the branching and the introduction of pulse channels in systems of time division multiplex transmission, in which a cumulative channel is sent out at the branching point, which consists of incoming and newly introduced individual channels, characterized in that a separator (7 ") is present, which consists of derives the synchronizing pulses from the incoming sum channel, that there is also a distributor (Z ₁ ) which distributes the incoming channel pulse trains to the individual channels (I to V), that a pulse generator is provided that generates a new, initially unmodulated sum pulse train that is in frequency and Phase_ is synchronized by the branched off synchronization pulse and from which a new synchronization pulse is derived and fed to a new sum channel (S ₂ ) and from which the channel pulses are branched off and distributed to new individual channels (I 'to V) so that the new individual channels (I' to V) modulation devices (M ₁ to Ai _v ) are assigned through which a Selected single-channel pulse trains are modulated, and that switching devices are provided through which selected single-channel pulse trains of the incoming sum channel and selected single-channel pulse trains of the new channels are interconnected in such a way that a new sum-channel pulse train is created, the frequency of which is equal to the frequency of the sum pulse train of the incoming sum channel (S ₁ ) ,

2. Arrangement according to claim 1, characterized in that demodulation devices (D ₁ ... D _v ) are assigned to the individual channels of the incoming sum channel (S ₁ ) at the branch point.

3. Arrangement according to claim I, characterized in that the switching takes place by electromechanical or electronic means.

4. Arrangement according to claims 1 and 3, characterized in that the individual channels of the incoming sum channel (S ₁ ) ₁ which are not switched through to the outgoing sum channel (S ₂ ); with terminating resistors (Ri _... R iv) are connected.

1 sheet of drawings