SU1464158A1 - Dynamic priority device - Google Patents

Abstract

The invention relates to computing and can be used in systems that use the discipline of service from MeHHeNryro. The purpose of the invention is to enhance the functionality by allowing the arbitrary installation of the order of servicing subscribers

Description

sh

1J.II 15 16

lazy frequency of polling and masking requests for customer service. The device contains a group of 2 tone element And the control unit 1, consisting of a shift register 10 ° trigger 8, three elements liJIH 3-5, two evil elements And 6.7, block 11 registers, decoder 12, block registers 11

subscriber codes are programmatically recorded. When simultaneously receiving a few requests for connecting subscribers, the survey starts with the subscriber whose code is recorded in the first register of the register block, etc. in order of priority. The survey can be carried out in two modes, depending on the software installed1

The invention relates to computing and may find application in systems using variable service discipline. The purpose of the invention is to expand the functionality of the capabilities by allowing the subscriber service to be arbitrarily set up, polling frequency control and masking of subscriber service requests.

The drawing shows the proposed device.

The device contains} 1sit control block 1, a group of elements AND 2.1-2, N, elements OR 3-5; And 6 and 7 elements, trigger 8, device mode input 9, shift register 10, register block 11, decoder 12, device request inputs 13, device outputs 14, device code inputs 15 and device clock input 16.

The device works as follows

In the initial state, from the outputs of the AND 2 elements to the AND 6 elements, O, B, block 11 of the priority registers from the input 15 of the device load registers with parallel codes of the subscribers served.

When requests are received for the request inputs 13 of the device, the trigger 8 is set to one state through the element OR 3 and the element

1464158

state of the trigger 8. If the mode input is in the single state (realization of the priority service mode), then after the subscriber’s service has ended, if there are unserved requests from the registers block, the subscriber code stored in the first register of the registers block, i.e. polling is carried out with the highest priority subscriber. If the mode input is in the zero state (sequential service mode), after the end of the subscriber service, polling is performed from the next register register block, and hence from the next subscriber by priority 1. 1 il.

and 6, a potential appears at its single output, allowing control register 10 to operate on the control input.

When a clock pulse arrives at the clock input 16 of the device at the outputs of the shift register 10, the signals arriving at the clock inputs of the block 11 of priority registers are output. At the same time, subscriber codes are read and received from the outputs of block 11 to the inputs of the decoder 12, the outputs of which generate subscriber polling signals received at the input of a group of elements of I 2. For example, if the registers of block 11 contain subscriber codes 2, 4, 3, 1, the polling of the elements of the AND group will be in the order of 2.2, 2.4, 2.3, .2.1,

The survey is performed in the order of the subscriber's priority priority, before reading the next priority register of the code of the subscriber who sent the request. In this case, at the output of the corresponding element AND 2 of the group, a signal of the permission of the service is received, arriving at the corresponding code 14 of the device. Simultaneously through the element OR 4 on, zero input

the trigger 8 appears a signal that resets the trigger B to the zero state, the shift control register signal 10 is output at the output, the generation of signals at the shift output stops

register 10 and polling stops

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registers of block 11. The polling can be carried out in two modes depending on the state of input 9 of the mode.

If input 1 (priority service mode), when servicing the current request, the service enable signal from the output of the corresponding element AND 2 groups through the elements OR 4, AND 7 and OR 5 enters the reset input and sets the initial state of the shift register 10 As a result, after the control input of the shift register 10 arrives at the control input - Lenin from trigger 8, the polling begins at the first register of block 11, which means from the highest priority subscriber.

If the trigger 8 is in the zero state (sequential service mode), then after the receipt of the permission signal to the control input of the shift register 10, the polling starts from the next register of block 11, which means from the next subscriber. The reset and initialization of the shift register 10 occurs at the end of the interrogation cycle, after all the registers of block 11 are polled by the signal from the last output of the shift register 10 through the OR 5 element.

Thus, to change the order of polling subscribers, it is enough when writing subscriber codes to the registers of block 11 to redistribute them between registers according to new priorities. To change the polling frequency of subscribers, it is enough to write the codes of the respective subscribers in the required number of registers of block 11. At the same time, the polling frequency in one cycle of polling is proportional to the number of registers in which the code of this subscriber is written. To disguise subscribers, i.e. excluding them from the polling cycles, it is sufficient that the codes of the corresponding subscribers are not recorded in the registers of block 11.

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Claims (1)

Invention Formula A dynamic priority device containing a group of elements II and a control unit consisting of a shift register, a trigger, three OR elements and two AND elements, and the inputs of the first OR element are connected to the device request inputs and the first inputs of the AND group elements, the inputs of the second element OR connected to the outputs of elements AND of a group, with inverted inputs of the first element AND and with the outputs of the device, the outputs of the first and second elements OR are connected respectively to the direct input of the first and the first input of the second element And, a single trigger input is connected to the output of the first element And, a zero input of the trigger is connected to the output of the second element OR, the output of the trigger is connected to the control input of the shift register, the input of the device mode setting is connected to the second input of the second element And, the output of which is connected to the first the input of the third element OR, the second input of which is connected to the last output of the shift register, the output of the third element OR is connected to the reset input of the shift register, the clock input of which is connected to the clock input at Units, characterized in that, in order to dissipate functionality by allowing an arbitrary setting of the subscriber service order, polling frequency control and masking of subscriber service requests, a decoder and a register block are inserted into the control unit, and the clock inputs of the register block are connected to the corresponding outputs the shift register, besides the latter, the information inputs of the register block are the code inputs of the device, the outputs of the register block are connected to the input Ams of the decoder, each output of which is connected to the second input of the element of the same name AND group.