SU668629A3 - System for selective exchange of information between subscribers - Google Patents

Description

one

The invention relates to information transmission systems and can be used to exchange information between data transmission and reception authorities at subscriber stations that are remote from one another.

Closest to this invention is a system for exchanging information between subscribers 1, comprising N exchange control devices and N subscriber stations, each of which contains a set of low-speed and a set of high-speed input-output devices.

In such a system, information is exchanged between the issuing and receiving authorities through a central switching unit associated with various authorities transmitting lines to send commands to each of them via an appropriate matching circuit.

However, this technical solution has insufficient flexibility, since it is difficult to apply in some specific cases when the sequence of information exchange between the central unit and each switching unit is of a quasi-random nature, depending on the type of the relevant authority, the nature of the task and the processing process. The aim of the invention is to expand the scope and increase the reliability of the system.

The goal is achieved by the fact that each of the exchanging control devices contains a memory unit, a memory access unit connected by two-way communication with the memory unit, and an interface unit whose output is connected to the input of the memory access unit. a matching unit connected by two-way communication with a subscriber station and a control unit connected by two-way communication with an interface unit, a memory access unit and a matching unit, and the interface units of all exchange control devices are interconnected on inputs and outputs, as well as the fact that the control unit

contains the address driver, the access register, the input of which is connected to the output of the address driver, the memory node, the 5yon input interface of which is connected to

the output of the access register, the output register whose input is connected to the output of the memory node, the accumulating register, the temporary storage register, the reference node, the first input of which is connected to the output of the temporary storage register, the group of elements AND whose control inputs are connected to the output of the comparison node, an adder and a synchronization node whose outputs are connected to the control inputs of the adder, a comparison node, a memory node, an address driver and the corresponding output of the block, while the output of the output register is connected to the first ode accumulating register and with the input of the group of elements And, the output of which is connected to the first input of the address generator, the second input of which is connected to the corresponding inputs of the block, the output of the accumulating register is connected to the second input of the comparison node, the corresponding outputs of the block and the input of the adder, the output of which is connected to the second the input of the accumulating register, the third input of which is connected to the corresponding inputs of the unit, and the fact that the memory accessing unit contains a recording control unit, the inputs of which are connected with the corresponding inputs of the block, the write register, the input of which is connected to the output of the write control node, and the output to the corresponding output of the block, the read control node, the synchronizing input of which is connected to the corresponding input of the block, and the outputs to the corresponding outputs of the block, read register, output which is connected to the information input of the read control node, and the input to the corresponding input of the block, and the access register, the input and output of which are connected to the corresponding input and output of the block.

FIG. 1 is a block diagram of a system for the selective exchange of information between subscribers; in fig. 2 is a block diagram of two MO and MOk exchange control devices; in fig. 3 is a block diagram illustrating the exchange of information that can occur between two MO and MOk exchange control devices; in fig. 4 is a functional diagram of an MO exchange control device, due to which the subscriber station Stj can exchange information with other points connected to the system.

The system contains an exchange control device 1, subscriber stations 2, a set of low-speed I / O devices 3, a set of high-speed input-output devices 4, a memory block 5, a memory access block 6, a interface block 7, a matching unit 8, a control block 9, address driver 10, access register 11, memory node 12, output register 13, accumulation register 14, temporary storage register 15, comparison node 16, AND 17 group, adder 18, synchronization node 19, write control node 20, register records 21, control node 22, read register 23 and hit register 24.

The system works as follows.

When a command arrives at the communication control device I via a communication channel, a program is executed to respond to a request for information transfer, either from the communication control device 7, sending the command, or from one of the subscriber stations 2. If mentioned ; the command orders the device 1 to respond to a request for information transfer received from the subscriber station, then this device receives a preferential right to use the communication channel, which allows it to access one of the other devices 1 so that the latter issues or receives information to be transmitted at the request of the subscriber station 2. If the mentioned command is coming from another device 1, it orders the first device 1 to respond to the request for the transmission of information sent by the other mouth oystvom first slave device 1 becomes nu said another device CB, which has a priority right to use the communication channel. In this latter case, the first device 1 performs the transfer of information with preprocessing or

without it, at the command of another device 1, i.e. transmission on request, to one of the subscriber stations associated with the device, has a preferential right. Depending on the nature of the command received by device 1, the latter becomes either dominant in the dialogue over the communication channel and controls the exchange of information between the I / O devices of the subscriber station and the I / O devices 3 and 4 of the other subscriber stations

5 or a slave to another device 1, which dominates the dialogue over the communication channel, when this latter, controlling the exchange of information between the I / O devices of the subscriber station that is associated with it, and the I / O devices of the other subscriber stations, wants to exchange information with subscriber station I / O (Stj). Thus, the system allows each of the devices 1 to control the exchange of information between the I / O devices of the subscriber station, which is connected with it by the I / O devices of the other subscriber POINTS, having obtained the preferential right to use the communication channel, and give this right to use the communication channel to another device 1 so that it, in turn, can control the exchange of information between the I / O devices of its subscriber station and the I / O devices of the other subscriber station in. In general, programs contain instructions that allow device 1 to transmit the preemptive right to use the communication channel to the next device 1.

FIG. Figure 2 shows an example of the implementation of two devices 1 of the system, respectively, associated with subscriber stations, each of which contains a set of low-speed input-output devices 3 and a set of high-speed input-output devices 4.

The memory block 5 contains programs and there is a zone for recording information coming from or intended for the subscriber station. Denote by (Ij) the information coming from the subscriber station Stj, and by (Ik) - the information coming from the subscriber station Stk. The interface unit 7, located in exchange control device 1 (M0), allows this device to send and receive said commands as messages, depending on which it can become dominant or subordinate, as well as transfer the preferential right to use the channel For the next device 1. The interface unit 7 allows the device 1 (MO) to send and receive information transmitted over the communication channel. On the other hand, the exchange control unit 1 (MOj) contains a control unit 9 (Cj) associated with the interface unit 7 (AB), a memory access unit 6 (L.D4) and a matching unit 8 (Sj) associated on the one hand, with a set of low-speed input-output devices (PLj) and a set of high-speed input-output devices 4 (PRj), and on the other hand with a control unit 9 (Cj). Block 6 (AM) is associated with memory block 5 (M), with interface block 7 (AV), with control unit 9 (Cj), and with a set of high-speed I / O devices 4 (PRj). Thus, the call signal can be sent through block 9 (Cj) and block 7 (AB) to block 7 (ABk) and block 9 (Ck) of device 1 MOk, which is prepared to receive the first message from device 1 (MOj) . Referring to the programs contained in memory block 5 (Mk), block 9 (Cj) can then use messages received from device 1 (MOj) to transmit information, if necessary, through zone Ik of memory block 5 (Mk ), or between block 7 (ABk)

and a set of high-speed input-output devices 4 (PRk), or between block 7 (.4Sk) and a set of low-speed input-output devices 3 (PLk), and in the latter case, transfer occurs through block 9 (Ck). According to the command signals sent by block 9 (Ck) to block 6 (.4AIk) in the same way, the command signals can be sent by block 9 (Cj) to block 6 (4./Mj), or block 7 (L Sk), or block 9 (Ck), or a set of high-speed devices

0 I / O 4 (PRk) can be read or written to memory 5 (Mk) by a command received previously by block 9 (Ck). FIG. 2 shows the case when input and / or output devices operating at very different speeds are connected as part of the system at the same subscriber station level. In this case, the system represents the most high-speed input-output devices of various subscriber stations.

Q possibility of direct access to b, 1 memory of the corresponding devices 1 through blocks such as block 6 (.4; VJj) and (AMk) MOk and; VIOj.

To make the process better.

5, the exchange of information between different subscriber stations through the system, FIG. 3 is a block diagram that shows how information can be exchanged between two devices 1 MO and MOk connected in

0 any places to the communication channel of FIG. 1. When device 1 (MO) receives (for example, from the previous device 1 in the communication channel) the preferential right to use the communication channel for dialogue with another device 1 using its own internal means, it determines whether there is any information (Ij ), coming from the subscription point (Stj), which must be transmitted over the communication channel. If device 1; MOj) is an information transmitter (Ij), then it sends a call to device 1 (.MOk) to turn it into a slave device as a message ordering it to receive information (Ij). When the device (MOk) is ready, information (Ij) is transferred from the device (MOj) to the device (MOk). After transferring all the information (), ycTp.oiiia sends to the MOk device a transmission termination signal that puts the AlOk device in a non-working state relative to the communication channel, allowing it, however, to transmit information (Ij) to the subscriber station (Stk). If the device (MOj) is not a transmitter of information, but on the contrary, it must receive information

(Ik) from device 1 (MOk) coming from the subscriber station (Stk), then device 1 (MOj) sends a call to device 1 (MOk) to turn it into a slave

a device, in the form of a message, ordering it to send information (Jk) to this device (MO). After the MOK transmits the information (Jk) to the MO device, it sends a signal to that device to transmit this information, and then it is rendered inoperative with respect to the communication channel. Information (Ik) can be transmitted from device 1 MOj to subscriber station (Stj) after being sent to memory block 5. In this case, when device 1 (MOj) is an information transmitter (Ij), To as soon as it detects that device 1 (MOk) actually received the signal of the end of the transmission of information (Ij), which was sent to it, it transmits the last message to another, for example, the next device 1 to transfer to it the priority right to use the channel. In this case, when device 1 (MOj) is an information receiver (Ik), as soon as it receives a signal that the transmission of this information has been sent from the MOk device, it also transmits the last message to another device 1

To send him the right to use the communication channel. In this case, when device 1 (MOj) accepts from another - (E; the units 1 have the preferential right to use the communication channel and have no | formation to be transferred to another device 1 or received from another device 1, it is immediately the assistance of a single message sent over the communication channel transfers the preferential right to use the communication channel to another, for example, the next device.

FIG. 4 shows examples of the execution of the control unit 9 and the memory access unit 6. The control unit contains the memory node 12, in which the firmware is written, so that the control unit 9 can operate, being connected to the communication channel, by the memory unit 5 and the subscriber station 2. The memory node 12. is accessed via the reference register 11, and the contents of this / memory are read through the output recorder 13. All instructions and data circulating in the control unit 9 are passed through accumulating register 14. Another register 15 is intended for temporary storage of some data received by control unit 9, and allows comparing this data in comparison node 16 with other data temporarily stored in accumulation register 14, and addressing memory node 12, in case of equality of the mentioned data. These calls are performed, for example, by connecting some of the triggers of the register 13 to the inputs of the address generator 10,

associated with its outputs with access register 11, and by allowing the transmission of signals from register 11 to the address form 10 through an element group And 17. While device 1 (MOj) is not dominant in the conversation over the communication channel, it is out of service state (unless it is currently a device that is slave to another module). When a call comes from a communication channel and is sent by the interface unit 7 to the input of the formation of address 10, device 1 (MOj) is notified that the other device will send the first message to it. Upon receiving this call, the address shaper 10 allows the access register 11 to access the first firmware to prepare the device 1 (MOj) to receive the first message with command signals sent to the interface unit 7 from the output of the register 14. Then the device 1 (/ vlOj) through the conjugation unit 7 can notify the device that caused it 1 that it is ready to receive its message. Said first message sent to device 1 (MOj) is transmitted from the output of interface unit 7 to the control unit 9, which, using the firmware contained in memory unit 12, determines whether this message is a preemptive right command or communication to the communication channel. This first message also indicates to device 1 (; MOj) its origin, giving it the address of sending device 1. From the output of accumulation register 14 connected to the inputs of interface block 7, the MOj device informs the sending device that the first message sent to it the message is identified and is ready to receive a possible second message if it is a slave device when transmitting information over the communication. In this case, the second message, received and identified by the control unit 9, allows access to the SJ programs, with which device 1 (MOj) will be able to have a dialogue with at least one of the subscriber stations (Stj). To access memory block 5, access register 24, which is located in memory access block 6, is connected with its inputs to register input 14, and its outputs with memory unit 5. It writes to this memory Through the write register 21, and the read through the read register 23. The write control node 20 and the read control node 22, connected respectively to the inputs of the write register 21 and the read register outputs 23, allow writing and reading information, respectively, to the interface block 7, control unit 9 and a set of high-speed drives I / O units 4. Thus, command signals determined by instructions readable in memory unit 12 are sent to the inputs of read control unit 22 so that control unit 9 can read programs Sj in memory unit at least one address provided by the access register 24. If device 1 (MO) has information (Ij) stored in memory block 5 and is to be transferred to another device (command or slave), control unit 9 sends command signals to readout control inputs 22 for o, so that the interface unit 7 can read information (Ij) at the sequential addresses of memory 5, provided by the access register 24. Conversely, if device 1 (MOj) has to receive information from another device and place it in area Ij of the memory 5, the control unit 9 sends command signals to the inputs of the recording control unit 20 so that the interface unit 7 can write information to the serial addresses of zone 1 issued by the register 24. In the same way, other command signals sent, respectively, to the inputs of the nodes control Writing and reading 20 and 22, transfer information between memory unit 5 and a set of high-speed I / O devices. To transfer information between the memory unit 5 and a set of low-speed I / O devices 3, the shadow control unit 9 generates command signals that are transmitted either to the inputs of the write and read control nodes 20 and 22, or to the matching unit 8 associated with input devices - output 3. For a separate communication, the control unit 9 can send commands to the high-speed I / O devices 4 so that the latter transmit information to the memory block 5. For the same communication, the high-speed I / O devices 4 can co schat control unit 9 that they have information to be communicated to another device through a subscription item 1 (MOj).

The synchronization unit 19 contained in the control unit 9 is connected to the various units of the device 1 to ensure their synchronization. In this case, when information is transferred between devices 1 in a sequential manner, synchronization node 19 is also connected to a communication channel. Thus, due to the signals received and produced by the synchronization node 19, device 1 (MOj) can operate with synchronization depending on the time when it receives a call from another device and the transit time required for transmitting elementary information, t. e. one signal, from the MOj device to another device, with which the dialogue is conducted, via the transmission lines of the communication channel. Comparison node 16, connected to the output of temporary storage register 15, and adder 18, received from register 14 the address of the device (MOj). allow this address to be incremented to obtain the address of the next device 1 that the device (: MOj) then sends in the first message, via register 14, to the device to which it must transfer the preferential right to use the communication channel, having completed the exchange of information it must conduct.

Since the exchange of information at this point is organized by its own device 1, the system allows you to add new subscriber lines by connecting the same number of devices 1 to the communication channel without changing the operation of the device when exchanging information between previously connected subscriber units.

points.

Claims (3)

1. A system for the selective exchange of information between subscribers, containing N exchange control devices and X subscriber stations, each of which contains a set of low-speed and a set of high-speed input-output devices, such that. in order to extend the application area and increase the reliability of the system, each of the N exchange controllers contains a memory block, a memory access block connected by two-way links to the memory block, and a matching unit whose output is connected to the input of the circulation block a memory, a matching unit connected by two-way communications with a subscriber station, and a control unit connected by two-way communications with an interface unit, a memory access unit and a matching unit, while the interface units of all N y troystv controlling the exchange are interconnected at the inputs and outputs. 2. The system of claim 1, wherein the control unit comprises an address driver, a access register, the input of which is connected to the output of the address generator, a memory node, whose information input is connected to the output of the reference register, an output register, which input is connected to the output of the memory node, accumulating the register, the temporary storage register, the comparison node, the first input of which is connected to the output of the temporary storage register, the group of elements I. The control inputs of which are connected to the output of the comparison node, the adder and nodes Ate synchronization, the outputs of which are connected to the control inputs of the adder, comparison node, memory node, address driver and corresponding block output, while the output of the output register is connected to the first input of the accumulating register and to the input of a group of elements I, the output of which is connected to the first input of the address shaper, the second input of which connected to the corresponding inputs of the block, the output of the accumulating register is connected to the second input of the comparison node, the corresponding outputs of the block and the input of the adder, the output of which is connected to the second input of the accumulating register, the third input of which is connected to the corresponding inputs of the block. 3. The system of claim 1, wherein the memory access unit comprises a recording control node, the input of which is connected to the corresponding inputs of the block, a record register, the input of which is connected to the output of the recording control node, and the output to the corresponding output of the block , y3evi read control, the synchronization input of which is connected to the corresponding input of the block, and the outputs - to the corresponding outputs of the block, the read register, the output of which is connected to the information input of the read control node, and the input to the corresponding input One block and the access register whose input and output are connected to the corresponding input and output of the block. Sources of information taken into account in the examination 1. USSR author's certificate No. 444062, cl. G 06 F 15/16, 1972.