SU1275461A1 - Device for simulating the queueing systems - Google Patents

Abstract

The invention relates to specialized computer facilities, is intended to simulate the process of servicing a single device of any number of flows of equal priority and different laws of service and can be used in devices simulating the operation of queuing systems. The purpose of the invention is to enlarge the device when modeling the service process. The purpose of the invention is achieved by introducing into the device new functional connections between known blocks: a group of elements AND, a group of random pulse generators, a trigger and elements OR. I il. with (About with

Description

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The invention relates to specialized means of computing, is intended to simulate the process of servicing a single device of any number of flows of equal priority and different laws of service and can be used in devices simulating the operation of queuing systems.

The purpose of the invention is to simplify the device when modeling the process of servicing one device of any number of flows of equal priority and different laws of service.

The drawing shows a block diagram of the device.

Verbal model of the device.

One servicing device receives a group of flows for servicing. All service requests have the same priority. An application for any flow is accepted for service if there are no other applications in the service device. For any stream that arrives when the servicing device is busy, service is denied and they are lost. By the time the service interval of the order is random and distributed according to the law, depending on the number of flows of the order.

The device contains a trigger 1, the first 2 and second 3 elements OR, a group of elements And 4 and a group of generators 5 random pulses.

The device works as follows.

In the initial state, the trigger 1 is set to a position in which, at the output connected to the second input of each element AND, there is a high potential. All elements AND 4 are open for their first inputs.

The device works in the same way when a pulse arrives (application for service) from any of its inputs. Consider the operation of the device when a pulse arrives from its second input.

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The impulse from the input passes through the open element AND 4 to the start input of the second generator and through the element OR 2 to the first input of the trigger 1. The generator 5 is started, and the trigger 1 is tilted. After the triggering overturns, the voltage is removed from the second inputs of all elements I. Elements And are closed for the entire period of service of the application. New applications received at this time at any input of the device are not accepted for service, and are lost. 15

After completion of the operation (servicing application) of the generator 5, a pulse from the output of this generator passes to the output of the device and through element 20 OR 3 is fed to the second input of the trigger 1. The last is tilted, and a high (opening) voltage is applied to the second inputs of all elements AND the device comes back to its original state and again | ready to go.

Claims (1)

Invention Formula A device for simulating queuing systems, containing a group of elements AND, the first inputs of which are the information inputs of the device, and the outputs. And elements are connected respectively to the trigger inputs of the random pulse group generators, the outputs of which are the outputs of the served device orders, the trigger, the first and second elements OR, and, moreover, to simplify the device, the outputs of the AND elements the groups are connected to the inputs of the first OR element, the output of which is connected to the first input of a trigger, the output of which is connected to the second inputs of the AND elements of the group, the outputs of the genetic signals of random pulses of the group are connected to the inputs of the second OR element, the output of which a second input coupled to the trigger.