DK143377B - DEVICE FOR RECEIVING AND TRANSMITTING A BINARY CODED INFORMATION - Google Patents

Description

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(19) DENMARK VlS

Ι® (12) PUBLICATION NOW 143377 Β

DIRECTORATE OF THE PATENT AND TRADEMARKET SYSTEM

(21) Application No. ^ 75 ^ / 70 (51) IntCI.3 H 04 L 1/00 (22) Filing Day l6 · seP · 1970 // ^ 06 F ll / 080 (24) Race Day 1 6. s ep. 1970 (41) Aim. available Mar 18 1971 (44) Presented 10 Aug. 1981 (86) International Application No. "(86) International Filing Day ~ (85) Continuation Day ~ (62) Master Application No."

(30) Priority 17 Sep 1969, 1947078, DF

(71) Applicant LICENTIA PATENT-VERWALTUNGS GMBH, 6 Frankfurt 70, DE.

(72) Inventor Peter Eichler, DE: Rudolf Gerold, DE: Erich Herr = mann, DE.

(74) International Patent Bureau.

(54) Apparatus for receiving and transmitting binary chained information.

The invention relates to an apparatus for receiving and transmitting a binary encoded, of an address, a command, and of the existing redundancy information formed.

For the transmission of secured digital selective and collective call commands with a response, a method is proposed by which the information is formed by an address, command and one of these redundancies formed. From German Patent Specification No. 1,094,638, a dialing method is known by which the binary transmitted call in.

is inserted into a warehouse in the receiver and after completion is tested for real> * reception. The method suffers from the disadvantage that a transmission error can only be recognized after complete insertion of the call, which is associated with loss I * in terms of transmission speed and reception readiness.

From British Patent Specification No. 977,134 it is also known to co-transfer * m in 2 143377 a test redundancy based on address and information part, ie. based on address and command model, so that a failure test in the receiver is possible in a manner known per se.

In addition, from German submission no. 1,293,190, in addition to a test block and a data block, it is known to transmit a synchronization block for synchronization. The synchronization block here controls a clock generator.

Era British Patent Specification No. 861,272 discloses a method by which a transfer error can be recognized already during the address of the address call for faster resetting of the receiver to the idle state. This makes the recipient ready for new transfers faster.

From German submission no. 1,207,425, it is further known for error protection that from the receiving station, upon receipt, a receipt call is made to the calling station.

It is an object of the present invention to provide a transmitting and receiving apparatus of the kind mentioned above, which is capable of meeting the aforementioned requirements of proper addressing testing, faster resetting to false state by false call, and simultaneous testing of the command part, and which also exhibits the least possible range of apparatus.

To this end, the apparatus according to the invention is peculiar in that upon receipt by means of a transmitted synchronization signal and via a start / stop switch a clock generator which over a electric step coupler leads a predetermined one to each receiver individually associated address for a comparison switch , in which it is compared to the received address without storage and there is a comparison locking means, as controlled by the comparison coupling, by a deviation of at least one bit between the received and the prescribed address, the start / stop switch resets to the stop position and thus the receiver to the rest state that, by correspondence between the addresses, the subsequent command call is stored in a command store, and a redundancy calculator is provided in which a test redundancy is formed during the information inlet of the address and command call, which is compared with the subsequent redundancy calculator bend redundancy and, in accordance, release the stored command call for exploitation, where for transmission by means of a trigger criterion, a receive / send switch is set which starts over the start / stop switch the clock generator which produces a a synchronization signal, a set address call and, over a query link, a stored command call at an output, and a redundancy is generated in the redundancy calculator of address and command calls, which is controlled by the step switcher to the transmitted signal.

By the double utilization of the building components included in the total apparatus for both reception and transmission, a considerable reduction in the equipment supply is achieved.

The invention is explained in more detail below with reference to the schematic drawing, in which fig. 1 is a block diagram of one embodiment of a transmission station in a system according to the invention; and FIG. 2 is a modification of the embodiment shown in FIG. 1.

A start / stop switch 1 is in the "stop" position. At a received start signal, e.g. the transition from a binary 1 to a binary 0, the start / stop switch 1 is switched to "start", thereby initiating the control of the subsequent received signal, releasing a clock generator 2. The clock signal now controls an electronic step coupler 3, which with its output signals controls a mechanical or electrical setting means 4 for the selective dialing number and a bit switched 5, whereby the set selective dialing number for that station is interrogated bit by bit and the result thereof over a switch 6 is passed to a comparison switch 7. In the comparison switch 7 the received signal is now compared with the using the electronic step coupler 3 asked selective dial number bit by bit. If the two signals match, no signal appears at the output of the comparison coupling 7. If two compared binary characters differ from each other, an output signal from the comparison coupling 7 will be obtained, which signal over a saffron comparison barrier 8 reaches the start / stop. switch 1, triggered a signal which couples the start / stop switch 1 to "stop". By means of the output signal from this coupling the basic position of this station is taken.

At the same time as the receiving signal inputs to the comparison switch 7, the information command portion of the information enters a clock controlled command store 9. In addition, the overall information of a switch 28 reaches a redundancy calculator 10. Since the selective dialing number of the coupling and thus the binary digit sequence of the selective dialing number is known, the comparison can be made 7, the first part of an impulse telegram containing the address, but not the subsequent characters of the arbitrary selectable command, is tested. After the said test of the address, the comparison blocking means 8 is also switched on the electronic step coupler 3, so that the output of the comparison coupling 7 for the subsequent part of the pulse telegram cannot reach the start / stop switch 1. At the input of the information command model, the switch 11 is closed. that command storage 9 during this time is clock controlled.

After entering the last binary digit of the command, the switch 11 is opened so that the command information entering command line 9's command line 9 can be stored in the command store 9 and over a matrix switch 12 can be registered in a command register 13 after the redundancy test.

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After the input of the total pulse telegram into the redundancy calculator 10, it must exhibit a certain end position, if the signal has not been disturbed.

The correct end position of the redundancy calculator 10 upon entry of an information in a redundancy test port circuit 14 triggers a release command for a switch 15, e.g. by switching the battery voltage, the information supplied to the command register 13 over the matrix coupling 12 brings for registration. At the same time, with this signal, it is appropriate to block the command storage 9's entry until the registration is triggered, so that any subsequent disrupted commands cannot forge the already properly stored command.

The invention now also solves with simple means the task of transmitting a return call to the station which has sent an impulse telegram to the receiving station with the individual parts of the receiver presently described above. The solution of this task is described in more detail below.

By means of the release signal from the redundancy test gate circuit 14, an automatic receive / transmit switch 16 is actuated, which is thereby delayed or delayed switched from the previous receiving position to the transmit position, thereby initiating the acknowledgment delivery process. of the start / stop switch 1, which in turn disconnects the clock generator 2 and resets the electronic step switch 3 to its basic position. In this case, due to the function of the automatic receive / transmit switch 16, not the "receive" but the transmit basic position is taken.

The output of the automatic receive / transmit switch 16 affects switches 17, 18 and 19, whereby a binary output 20 is switched on and a binary input 21 is switched off. Furthermore, by means of this signal, the comparison locking member · 8 is actuated so that any output signals coming from the comparison circuit cannot affect the start / stop switch 1. Furthermore, the output signal from the automatic switch 16 is switched on the start / stop switch 1 to "start", thus that the electronic step coupler 3, which in the meanwhile has taken its resting position, is re-applied to the clock signal and, as in the receiving case, influences the setting of the selective dial number 4 and the bit switch 5. During the interrogation period of the selective dial number, the information about the switch 6 reaches a last switch 22 and from here switch 17 directly to the binary output 20. At the same time as the selective dialing number is switched on by means of the electronic step switch 3, the binary output signal from the switch 6 also appears over the switch 19 and the switch 28 to the redundancy calculator 10.

Following the polling of the selective dialing number by the step switch 3, a query of the command storage 9 follows over the storage interrogator 24.

In the command period, a switch 25 is closed while switch 6 is open. The information flow from the storage interrogator 24 to the binary output 20 and the redundancy calculator 10 is the same as at the address. By means of the storage interrogation means 24, the received command stored in the command storage 9 is interrogated and an output pulse telegram identical to the input pulse telegram is formed. The redundancy is calculated in the same way as the information is entered, as both address and command of switch 28 reach the redundancy calculator 10, which solves the Drawing Process in known manner. After going through the command model of the pulse telegram, the switch 28 and also the switch 22 are opened while the switch 23 is closed. Hereby it is obtained that the redundancy calculator 10 is now blocked for any subsequent signals, and the binary sequence calculated up to this point, the so-called redundancy, reaches over the output of the redundancy calculator and the switch 23 up to the binary output 20, which is immediately adjacent to the broadcast of the conaando combination. After the last redundancy bit is transmitted, the electronic step switch 3 has again reached its final position, which in this case where the automatic receive / send switch 16 is not activated, means that it is switched to the receive basic position. This also happens over the start / stop coupling 1, which also disables the clock signal. With this process, the receipt delivery, i.e. the return of the received information as a receipt sign, completed.

If this system is to send a command, ie. act as a transmitting station, a signal signal stream similar to the one described for the acknowledgment delivery runs, but with the difference that in this case the direct receive / transmit switch 16 is intervened, thereby triggering a sending cycle. The information intended for transmission in the form of a command or message must, of course, be filed in advance in a repository. The storage command already in use can be used as storage which is affected by the corresponding codematrix connection not shown in the figure for the transmission case. After the direct triggering of a transmit cycle, the automatic receive / transmit switch 16, as a result of the basic position of the electronic step switch 3, in this case is "included" and held in this position for the period of receipt receipt.

If the acknowledgment of the transmission occurs within the prescribed period, the processing of the acknowledgment signal takes place in exactly the same way as the processing of an impulse telegram, which must transmit a command. The difference, however, is that the redundancy test signal affects the automatic receive / transmit switch 16 in such a way that a repeated broadcast is prevented, with the basic "receive" position again being taken. If the acknowledgment signal arrives in a disturbed state, no release signal is output from the redundancy test port circuit 14, whereby the automatic receive / transmit switch 16 is returned to "send" after the prescribed time and a broadcast of the impulse telegram is performed. according to the scheme already described.

A not shown in FIG. 1 clutch takes over all triggering tasks, e.g. command indication and reset of the storage and redundancy calculator. As already described, it is necessary that the called station is synchronized to the calling station. For this purpose, the rate sensor 2 for reducing phase errors is suitably composed of an oscillator and a frequency divider, the oscillator oscillating by a multiple, but at least five times the clock frequency. It is advantageous to allow the oscillator to operate in continuous operation and to allow the start / stop switch to act on the frequency divider.

In practical operation, it may happen that a command store is stored by a recipient another command which has not been triggered by the operator and a new command will run. In order to avoid this command being lost in the receiving station and further avoiding that the new command as described above is continuously repeated by the sending station (since no acknowledgment signal is received from the called station), the command storage 9 can according to a favorable further development of the invention shown in FIG. 2, is supplemented by a single display repository 27 and a release port circuit 26. In this way, the first run-in command will still be available to the operator of the display repository 27. The newly run-in command can, after testing for accuracy, occupy the first command's space in the command repository 9th

This is done by transmitting the command in the command store by the release signal from the redundancy test gate circuit 14, which briefly opens the release gate circuit 26, to the indication store and from there reach an indication. A subsequent false command will be stored, but cannot be indicated, as no transfer to the indication storage occurs due to the failure of the release signal from the redundancy test port circuit 27.

In this case, the information need only be stored in command storage 9 for the period from the end of the command inlet to the redundancy test. In the rest of the time, the storage content is insignificant, which can lead to a clutch simplification.

In the following, the principle of collective calling must be described in more detail. During a call, all or a group of recipients must be able to be called independently of their selective call numbers. In a decadic selective dialing system, so-called pseudo-tetrads (digits 10-15) are used for each digit of the selective number due to the binary coding.

Conveniently, for receiving a call call, there is an utilization coupling parallel to the comparison coupling 7 for the first selective call number, which responds to the digit common to all the stations in the pseudo-thread. In the subsequent address portion, during which the comparison coupling 7 is disabled (due to the response of the pseudo-tetrade coupling) any arbitrary digit combination, preferably a digit, in the pseudo-tetrad can be output. Exploitation of the command and redundancy occurs as described above.

By means of the system's response to the collection number, it can be achieved by appropriate coupling measures that the receipt delivery on collection calls fails, or that the receiving stations in time order (eg corresponding to the numerical order in the receiving station's call number) automatically issue a receipt with their own number or the collection number. As already mentioned, the data transfer method of the invention advantageously allows "blind" commands to be transmitted to the receiver. Such commands are processed at the sending station in the same way as normal commands and are not noticeably processed at the receiving station, which means that a feedback is also triggered without any indication. These conditions are advantageously fulfilled by the command being entered in the command storage 9, but is not decoded in the matrix coupling 12 and thus is not indicated even though the switch 15 is terminated by the redundancy test signal and the acknowledgment output is triggered. In the case of an indication device switching device, the previously transferred command is not deleted.

Depending on the method of redundancy, the length of the information word must be kept constant during the information transfer. It is now conceivable that the information command section contains several command words. In connection with this, it may occur in practical operation that not all available words are used for the transmission. Nevertheless, instead of these words, some information must be transmitted instead. However, this information must not be indicated in the receiving station. According to the invention, this condition is fulfilled by transferring words such as this "filling information" that are not present in the other transfer vocabulary. By using a decadic selective dialing system, for this purpose, a digit in the pseudo-tether line presents itself for this purpose. A digit corresponding to the resting state may also be conveniently transmitted.

According to the invention, the corresponding coding of the individual words occurs in such a way that when a command word is entered in the part of the command storage assigned to that word, the other parts of the command memory are stored by means of an impulse word triggered at the entry present in the other transfer vocabulary ("impossible words") where there is a query link that prevents storage of the "impossible word" in a part of the command store (word store) where a possible word has already been stored.

Thus, in the particularly favorable method of storing the state of rest as "impossible word", the interrogation coupling need only determine the state of rest.

Claims (4)

However, a subsequent storage of a possible word in a word store where an "impossible word" is stored is possible according to the invention. The number of commands in each command decode, in accordance with the binary encoding, is not limited to 10. The number of possible commands is 2n, where n is the number of binary characters in each command. PAIENIKEAV Apparatus for receiving and transmitting a binary encoded, of an address, a command, and one of these redundancy information, characterized in that upon receipt by means of a transmitted synchronization signal and over a start / stop switch (1) ) a clock generator (2) is started, which, via an electric step coupler (3), leads a predetermined one to each receiver individually associated address to a comparison coupling (7), in which it is compared with the received address (4) without storage, and that there is a comparison locking means (8) which, controlled by the comparison coupling (7), at a deviation of at least one bit between the received and the prescribed address, resets the start / stop switch (1) to the stop position and thus the receiver to the resting state, a storage of the subsequent command call in a command store (9) and a redundancy calculator (10) in which during the information entry of adr essay and command calls form a test redundancy, which in the redundancy calculator unit (10) is compared with the subsequent redundancy and, accordingly, releases the stored command call for exploitation, for which a receive / send switch is set for transmission by a trigger criterion (16) which starts over the start / stop switch (1) the clock generator (2) which produces, by means of the electronic step switch (3), a synchronization signal, a set address call and, via a query switch (24), a stored command call at an output (20) and in the redundancy calculator (10) of address and command calls, a redundancy is generated which is controlled by the step switch (3) added to the transmitted signal, Apparatus according to claim 1, characterized in that means are provided which, upon receipt of a properly tested command, block the input of the command storage (9) until the command is deleted. Apparatus according to claim 1, characterized in that the command storage is designed as a shift register. Apparatus according to claim 1, characterized in that, after the command memory (9), an indication memory (27) is coupled, there is interconnected between them a release port circuit (26) which is controlled by the redundancy calculator (10) and the display memory (9) stored command can be overwritten with a new-in, for accuracy tested command.