DE1947078C3 - Method for the transmission of secure digital selective call and collective call commands with reply - Google Patents

Description

makes use of the benefits received when sending a selective call.

Address without storage with the address of the This task is performed in a method of

Receiver is compared and in the case of not ao initially mentioned type according to the invention thereby

Match at least one bit of the resolved that when a selective call is sent the

Address the recipient immediately in the idle-received address without saving with the

is placed in a state that a comparison is made when an address of the recipient is sent and when

Collective call at least a part of the address call mismatch of at least one bit of the

contains a criterion for a collective call and 35 Adrc ^ s the recipient immediately goes to idle

that when this collective call criterion vt. * · * is recognized, that when a collective call is sent

in the receivers no reset in the at least part of the address call a criterion

Idle state during the further information for a collective call contains and that when recognizing

emlaufs takes place and that the acknowledgment calls from this collective call criterion in the receivers are not

C ° r Address of the 30 reset to the idle state during the

Station and a command part and one from further information inlet takes place and that the

Both formed "edundanz" exist. Acknowledgment calls from the address of the acknowledgment call

2. Data transfer procedure according to the sending station and a command part and Claim 1, characterized by the fact that there is redundancy in one of the two, Called stations delay elements are presented in 35 Developments of the invention are indicated in the documents, which are characterized in such a way coordinated with one another.

are that the stations called by an advantageous arrangement for implementation

proper receipt of the transmitted acknowledgment of the data transmission method according to the invention

processing calls in the sending the collective call is shown in Fig. 1 and is to be used in the following in

Station arrive one after the other. 40 its function will be described in more detail.

3. Data transfer process after the start / stop circuit 1 is in position Claim 1 or 2, characterized in that "Stop". By a received start signal, e.g. B. to check the readiness for use of the transition from a binary 1 to a binary 0 The receiving station and / or the correct function- the Stai t / Stop circuit Ϊ is switched to »Start« and speed of the transmission path of the command office 45 thus the control of the subsequently received contains a criterion (blind call criterion) which is initiated in the signal by the clock generator 2 free-receiver an acknowledgment call & is sent. The clock signal now controls one without displaying the command. electronic step switch 3 in, which by its

Output signals the mechanical or electrical 50 setting of the selective call number 4 and a bit switch S controls and thus the set code number (Selektlvrufnummer) of this station bit for bit and using switch 6 of the

The invention relates to a binary data comparison circuit 7 in which the comparison scheme

The received signal is now transmitted with the transmission method for transmitting an address 5ä device7

and command calls of any length, for which the interrogated by the electronic step switch 3

Check for freedom from transmission errors compared to one of the selective call numbers bit by bit. Voice

Address and comrr.andoruf formed redundancy men both signals match, so the output shows

is also transmitted and in the case of the comparison circuit 7 called in din no signal. Differentiate

Stations the received address with one of the 60 two compared binary characters, so is through

A rcsse assigned to the called station compared an output signal of the comparison circuit 7, which

, the called station is sent to the Start / Stop-

Receipt emits an acknowledgment call and arrives from the circuit 1, a signal triggered that the

calling station switches the transmission of the entire start / stop circuit 1 to "stop". Through

Message is repeated until the 65 is shown. The output signal of this circuit is the

the called station has received an acknowledgment call. Basic position of this station taken.

Calling methods are known, namely the binary parallel to the arrival of the received signal in the

The transmitted call is stored in the receiver. Comparison circuit 7 is running ^ r command section

Vl 947 078

3 * 4

the information in a clocked command switched to "start" so that the electronic memory 9. Furthermore, the entire information step switch 3, which has meanwhile taken its rest position via switch 28 into redundancy, receives the clock signal again and Computer 10. Since the selective call number of the circuit, as in the case of reception, controls the setting of the selective and thus the binary sequence of the selective call number 5 call number 4 and the bit switch 5 ansv. is known. can the first part of the pulse telegram during the query of the selective call number, which contains the address through which the information reaches the comparison circuit via switch 6? be checked, but not switch 22 and from there to the last switch l /, the following characters of the practically any directly to the binary output 20. Simultaneously with the selectable commands. After the aforementioned io switching through the selective call number ^by checking the address is also on electronic step switch 3 is the Binarelektronischen Step Unlock. The comparison block 8 output signal from switch 6 is also switched on, so that the following part of switch 19 and switch 28 are connected to the redundancy of the pulse telegram from processor 10.

parallel connection? \ the start / stop switch 15 after querying the selective call number bycn

lungI to Ansj. ·: ■, en can. The step switch 3 is used to query the

When the information is received, the command memory 9 is closed via the memory removal switches, so that the command memory 9 is clocked for the time of the command memory 9. After the closed, while switch 6 is open, uSi the last binary character of the command 20 flow of information from the memory query 24 to the switch 11 is opened so that the input line of the command memory 9 via the binary output 20 and to the redundancy receiver eats the same as with the address. Through the command information in the command memory query 24, the command memory 9 is stored and the tmp command display 13 written and stored in the memory 9 via the matrix 12 can be queried after the redundancy check 25 and an output pulse can be displayed. Formed after de η telegram, which is identical to the entry of the entire pulse telegram into the input pulse telegram. The appointment of the redundancy computer 10 must this a certain redundancy? happens in a similar way as with the end position, provided that the information has not entered the information, both address and also has been disturbed. 3 ° The command is sent to the via switch 28

The ricMige end position of the redundancy computer Redunda.izrechner 10 and solves the Rfchenlft there after receiving information, the process triggers in a known manner. According to the major redundancy test gate 14 a release command for running the command part of the pulse telegram becomes the switch 15, the z. B. opened with the switching of the switch 28, as well as switch 22, during the battery voltage which switch 23 in the command display 35 is closed. This achieves

13 information pending via the matrix 12 that the redundancy computer 10 is now displaying for even-ucii. Advantageously .st is simultaneously locked with subsequent signals and to this input of the Signal'der ^Kommandospe: 9 Chers this time calculated Einärzeichenfolge, the blocked until clearing the display, so that so-called redundancy of the outcome of

• Any subsequent disturbed commands the redundancy computer :, and the switch 23 to the already correctly stored command does not reach the binary output 20, which can immediately falsify. The end of the transmission of the command combination takes place through the release signal of the redundancy test torsion. After the ^last n

14 the automatic receive / send switchover redundancy bits has been activated by the electronic step switch Λ tunt 16 rna from the previous receive 45 again reaches its end position, which, since the catch position on the send position - delays automatic receive / send switchover 16 in or without delay - switched over, which means that it did not respond to this case. The curtain of the acknowledgment is initiated again: Switches to the basic reception position. At the same time as the output of the redundancy check signal is also via the start / stop circuit 1, which the step switch 3 also assumes a position which separates the clock signal. With this process, the switching of the start / stop circuit 1 is effected, the acknowledgment, ie the return of the empian, in turn switches off the clock generator 2 and the genen information as an acknowledgment, aoge-

turn the clock generator g

electronic step switch 3 in its basic «closed. ^ »., ...,", " _mm , _n , _n

position resets, uurcn speaking aer -j »now in.» , -x, .. »^. - "......_..__ _-..-.

automatic reception / transmission switchover 16 will act as a transmitting station, so an ajin '^ ner is running

ii, in this case not the basic position reception, signal flow from, as described for the acknowledgment

but the basic transmission position of the circuit with the difference that in this hall

taken directly into the automatic receive / send address

The output signal of the automatic reception / circuit 16 intervened and the scan / cycle off

Scnde-Umschaltl6 controls the switch 17,18 6 ° is released. The information to be superior in

"Nd 19 at. as a result, the binary output 20 is in the form of a command or a ^M ^ ^ldun i; ^m _p '

switched and the binary input 21 separated. '-In a spifcug beforehand, of course-

Furthermore, the comparison will have been made through this signal. One can use the ready as a memory

lock G operated so that possibly of the existing K ^ ™ ³ "^ ¹ ^" *, ^ "" J. ^ Zl

eichssch: Timing coming output signals the 6 ₅ through a corresponding Codierm.Ur.x dc "^ ^ [

Lrt / Stop-Schaltl can not influence. Figure not shown '^ V ^, η Aus ^ sunE e "nes

With dJ, output signal of the automatic reversing w.rd. ^ h the direct drawing of a

circuit, the Start / Stop-Sdialtung 1 Sendezyk.us w.rd through the basic setting of the

electronic step switch 3 is transferred to the automatic memory and from there to

Receive / Sendc-Umschallung 16 in this case went on display. A subsequent fake

»Receive« is switched, and in this position for commands is saved, but can

the time of receipt of the receipt is recorded. not be displayed because of the absence

If the 5 of the release signal of the redundancy check is acknowledged within the specified time

If the transmission is sent, the processing of the transmission into the display memory 27 does not take place.

Acknowledgment signal just like the processing of a For this case the information in the

Pulse telegram that transmits a command. Command memory for the time from the end of the

target. The difference, however, is that the command input up to the redundancy check

Redundancy check signal the automatic reception / ίο be saved. For the rest of the time it is

Send changeover 16 affects the memory content irrelevant, which leads to the switching

once repeated transmission is prevented, it can lead to panning.

the basic position "reception" is cinge- The principle of the collective call is to be used in the following

took. If the acknowledgment signal arrives disturbed. so to be described in more detail. Through a collective call

If the redundancy test gate 14 does not have an enable signal 15, all or a group of receivers should be

issued, whereby after the specified time the addressed regardless of their selective call number

automatic reception / transmission switchover 16 to serve. For a decade selective call

"Send" is switched back and the number system is sent through the binary

Impulse telegram in the scheme already described, coding so-called pseudo-tetrads (digits 10

performs. ao to 15) for each digit of the selective call number.

F. a circuit not shown in Fig. 1 For the reception of a collective call one of the takes over all tasks of the deletion, ζ. Β comparison circuit? evaluation of the command display connected in parallel and the resetting of the circuit, expediently for the first selective memory and the redundancy computer. As already provided call number, which is described for all stations, it is necessary that the called 35 common digit of the pseudo-tetrad responds. Station is synchronized. To reduce For the subsequent address part, for the & c phase errors is this, advantageously, the Tale 'comparison circuit 7 is set außei Ί jnktion, encoder 2 is composed of an oscillator and a frequency (by the response of the pseudo Fetraden scarf splitter, wherein the Oscillator on device) any combination of digits from a multiple, but at least the five- 3 "can be sent, preferably a digit that times the clock frequency oscillates. It is beneficial to use pseudo-tetrad. The evaluation of the command to operate the oscillator continuously and The redundancy and the redundancy takes place as described above. Star / Stop circuit on the frequency divider emwir- When the arrangement responds to the collective number, the number can be switched by means of suitable circuit measures

In practical operation it can happen that the acknowledgment is staggered in a time sequence in the case of a collective call in the command memory of a recipient (e.g. entKommando is stored because the operator has not yet received the digit sequence of the call number of the operator has been deleted, and a receiving station) automatically receives an acknowledgment with a new command. In order to avoid that his or her collective number is lost, this new command is lost in the receiving station- A ° Es Kl also for the purpose of checking the quality of the goes and also to avoid that the transmission link and / or the operational command The command from the sending station, the receiving station is able to "blindec Kom as already described, is continuously repeated (since mandos are to be transmitted to the recipient. You will not receive an acknowledgment message from the called station like normal commands at the seridestation), like in Fig. 2 reproduced 45 acts, on the receiving station to the outside the command memory 9 is processed by a simple imperceptible, ie it is just display memory 27 and a release gate 26 added if a response is triggered without one. In this way, the first notification received by the recipient is processed. This condition correspondence in the display memory 27 for the operation are expediently fulfilled by the fact that the operator is still available. The incoming 50 command can, after checking for correctness, write the command that is written, but not over-decoded in the matrix 12 in the command memory 9 and thus displayed. although by the redundancy check signal of the

This is done in such a way that the command in the Korn switch 15 is closed and the acknowledgment is issued from the command memory by the 55. In the case of a circuit arrangement with an enable signal from the redundancy test gate 14, which briefly switches the previously transmitted release gate 26 to a display memory, it is not overwritten in the display command.

1 sheet of drawings

Claims (1)

I 947 0/8 1 2 and after the run-in for correct claims: receipt is checked. This method has the disadvantage that a transmission error only occurs after 1. Binary data transmission process for the complete incoming call to be recognized ■ The transmission of an address and command call 5 can result in a loss of transmission speed. Any length that is connected to the test for speed and readiness to receive. Out Transmission error-free is one of the address and British patent specification 977134 as well Command call formed redundancy with over-known, a check redundancy from address and will carry and at the in the called information part with to be transmitted, so that in the Stations the received address with one of the io receivers: n a known manner an error called The address assigned to the station can be checked. is like, the called station in orderly The invention is now based on the object upon receipt of an acknowledgment call emits a method for transmitting secure commands and from the calling station, the transmission either to individual stations (selective call) or the whole message is so long Repeat At, 15 to a whole group of stations (collective) to create an acknowledgment call from the called station that eliminates the disadvantages of the known present, characterized in that the method does not have and still of their