SU476702A1 - Device for dynamic connection management in an automated communication network - Google Patents

Description

one

The invention relates to telephone and telegraph network control systems.

A device for dynamic control of connections in an automated communication network is known, comprising switching units, a central control unit (DCC), a register associated with a descrambler, a random access memory (RAM) connected to the input of the comparator unit.

Such a dynamic control system requires the transmission of information about the state of the communication channels. This leads to their additional loading, creates additional load and control nodes, which reduces the speed of the device.

The purpose of the invention is to increase the speed - in the proposed device one of the outputs of the central control device is connected to one of the inputs of the comparison unit directly, and the other through the code generation unit to the other input of the comparison unit whose output is connected to the RAM input. , to the second input of which is connected the output of the descrambler. In this case, the register is connected to the central control device, and the second output of the comparator unit is connected to the input of the code generation unit.

Ia the drawing shows the block diagram of the proposed device.

Register 1 is connected to a switching unit 2, whose inputs serve to connect

the caller. The outputs of the central control unit (CIU) 3 are connected to the switching unit 2 and the switching unit 4, the outputs of which serve to connect the direction channels of the called subscribers. Register 1 p MCC 3 sv 1s between each other by a chain 5, to the output of the register 1 is connected a decoder 6, the outputs of which are connected to an operative memory device (RAM) 7, to another input of which

the output of the comparison unit 8 is connected. The input 9 of the latter is connected to the output of the RAM 7, input 10 is connected to the DCC 3, input 11 is the output of the direction code generating unit 12, input 13 of which is connected to the second output

Comparison 8. The second input 14 of the unit 12 is connected to the output of the central control unit 3, and the second output 15 is connected to the input of the central control unit 3. Between the switching units 2 and 4 a cord set 16 is placed. The device works as follows.

Upon arrival at the switching unit 2 of the call signal and the corresponding control signal from the DDU 3, this unit connects register 1, in which the number of the called subscriber is recorded. At the end of the reception

numbers register 1 is accessed by circuit 5 to

TSUU 3, which allows him to transmit to the decoder 6 information about the number of the called subscriber. According to this information, a signal appears on one of the outputs of the decoder, which reads information about the estimates of the communication direction channels connected to the outputs of switching unit 4 and is stored in memory RAM 7. Matrix R is recorded in RAM 7; for example, from caller; its subscriber n ° 1 to the called subscribers (/) n ° n ° 2-4 can be established via the communication channels (/) nos. 5-7 corresponding directions;

R

The number ccrj, standing at the intersection of the line and column, characterizes the equivalent estimate of the / -th direction of communication when establishing a connection with the i-th subscriber, i.e., is a statistical number, the value of which depends on the number of penalties and incentives for the appropriate operation of the system flow allocations.

The signal from the decoder 6 with RAM 7 reads the corresponding row of the matrix, which enters the comparison block 8.

Comparison unit 8 and direction code generation unit 12 can operate in the mode of selecting the direction of establishing communications and in the mode of changing the equivalent estimates of the directions of communication.

The mode of operation is determined by commands of the DDU 3, which are transmitted to the comparison unit 8 via input 10 and to the direction code generation unit 12 via input 14.

When choosing the direction of the connection (the first mode), the comparison device 8 compares the elements of the row of the matrix K, which does not come from the RAM 7, and selects the smallest number of penalties. The signal about the location of the smallest number in the matrix row / comparator unit 8 transmits to the direction code generation unit 12. The code information of the selected direction is transmitted to DTU 3, which finds a free channel in the selected direction, connected to the outputs of the switching unit 4. If there is a free channel in the selected direction is not, the comparison device 8 but the command of the MCU 3 compares the row numbers of the matrix R a second time and selects the next direction, and so on, until the free channel of the direction of communication is found.

After the free channel is detected and the control device 3 is connected to it via the switching unit 4 of the register 1, a command is received to the comparison device 8 from DCC 3, where the row of the matrix R returns without changing to the corresponding

RAM address 7. After the connection is reached by the called Hocina abbreviation or the calling subscriber receives information that the connection cannot be established due to the busy or faulty channels of any direction of communication, the equivalent estimates of the direction change ( mode).

Register 1, connected via the switching unit 4 to the channel of the selected direction, receives information about whether the installed connection reached the called subscriber or not. The DDU 3 determines the directional code of the channel to which the register is connected, transmits a command to the register to the register, to the decoder 6 of the code of the called subscriber number, and to the code generation unit 12 n the comparison unit 8 via inputs 14 and 10 respectively R corresponding to the connection to be established for the direction of communication. The decoder 6 converts the code of the called subscriber into a signal on one of

of the outputs, according to which information is read out from the RAM and transmitted to the comparison unit 8. Simultaneously with the ethnm, the code generation unit 12 transmits to the comparison unit 8 a command to change the corresponding number (bit, lines of matrix R, transmitted to the comparison unit 8 from RAM 7). It should be borne in mind that the number of rows of the matrix

/..1, a 2a, .1, for 1,2, ...,,

;

where n is the number of outgoing directions of communication of the device for dynamic connection control. Therefore, any change in numbers

rows of matrix R must satisfy the condition set, which is performed by comparison unit 8.

After changing the number of ats (reduced, if the connection with the called subscriber is not

established due to the absence of free channels in the selected integral direction of communication, or an increase otherwise) and a line feed by the comparison block 8 to fulfill the condition

2 -iJ 1

the newly formed row of matrix R is returned to the random access memory 7. At the same time, if the connection reached the called subscriber, the DCC 3 of this dynamic connection control device in the automated communication network releases the register 1 and connects the switching blocks 2 and 4 directly through the PC set 16, which provides the connection to the calling and called parties or sends to the calling subscriber (through the inputs of block 2) the signal "Zanto.

Subject invention

A dynamic connection management device in an automated communication network containing switching units, a central control unit (DCC), a register associated with a decoder, a random access memory (RAM) connected to the input of the comparison unit, characterized in that increase its speed, one of the outputs of the DCC is connected to one of the inputs of the comparison unit directly, and the other through the code generation unit to the other input of the comparison unit, output

which is connected to the RAM input, to the second input of which the output of the decoder is connected, while the register is connected to the DDU, and the second output of the comparison unit is connected to the input of the code generating unit.