SU832764A1 - Device for priority selection of subscribers - Google Patents

Description

(54) DEVICE FOR PRIORITY ELECTION OF SUBSCRIBERS

one

The invention relates to radio engineering and can be used in information transmission systems.

A prioritized device for subscribers is known, which contains the first and second address generation units, with the first inputs of the first and second address generation units being connected to the respective communication lines, the ready trigger and the initial installation block 1.1.

However, the known device has a low speed.

The purpose of the invention is to increase the speed of election of subscribers ..

The goal is achieved by the fact that the device of priority election of subscribers, containing the first and second blocks of the address formation, the first inputs of the first and second address formation blocks are connected to the appropriate communication lines, the ready trigger and the initial installation block, the block is entered

forming the shift signals, the shift register and the signal generator of the end address, the output of which is connected to the input of the initial setup unit, the output of which is connected to the control input of the shift register and the input of the ready trigger, the output of which is connected to the control inputs of the first and second address formation blocks, the outputs of which are connected to the corresponding first inputs of the shaping unit of the shift signals, the second inputs and outputs of which are connected to the corresponding outputs and inputs of the shift register, the course of which is connected to the input of the signal conditioner of the end of the address.

FIG. 1 shows the structural electrical circuit of the proposed device for subscribers containing a four-digit address; on FIG. 2 - signal plots in communication lines.

The device of priority election of subscribers includes a trunk with lines 1 of communication, the first 2 and second 3 blocks of the formation of the address, block 4 of the initial installation, trigger 5 of readiness, block 6 of the formation. shift signals, shift register 7 and shaper 8 signal of the end of the address.

The device prioritizing the election of subscribers is as follows.

The binary code of the subscriber's address is formed by the first blocks 2 (code 1) and the second blocks 3 (code O), the signals from which through block 6 go to register 7, the number of bits of which is one more than is required to form the address code. The higher priority corresponds to the larger binary code of the subscriber's address. The period between the clock (negative) pulses in lines I, generated by the central device located at one of the two ends of the trunk, is equal to twice the propagation time of the signal in the trunk. The address code of the subscribers is represented by positive pulses and gaps between the clock pulses.

The presented address codes of three ready-to-work subscribers (FIG. 2) correspond to 1001, 1011 and 0010.

By the signal Setup through block 4, the trigger of the first block 2 and all but the first one of the bits of register 7 are set to the zero state. The first bit of register 7 is set to one.

When the first, second, and third subscribers are ready for operation, the triggers 5 are in a single state. If there are sync pulses in line x 1, according to the 1st sync pulse (Fig. 2), which corresponds to the first cycle of the device, the first subscriber produces a positive pulse to the first line 1, which immediately after the sync pulse follows the inputs of the second and third subscribers. The second subscriber is shifted 1 to the right, since the most significant bit of his address also contains the unit code, and in the trigger of the first block 2 code 1 is recorded, which is the enabling signal for generating a positive pulse in the next cycle. After the second measure

32764, -4

the trigger of the first block 2 is reset to the zero state. The state of the third subscriber's register after two cycles does not change, since, following the clock pulses, the first second subscribers produce positive pulses. Which, return its register 7 to its original state. On the third bar of the third

The Q subscriber in register 7 shifts the unit to the right by one bit, for the first subscriber the state of register 7 does not change, since in the third digit its address contains 5 s of code O, and the register information

7, the second subscriber is shifted to the right by one bit. In the fourth cycle, code I in the register 7 of the second subscriber falls into the fifth digit. A code 1 hit the fifth digit of any subscriber is a signal that the next address is generated and sent to lines 1. The output of the fifth bit of the register 7 is connected to the driver 8, which generates a permission signal for the exchange of the given subscriber and installation of the device in the initial / state. After the arrival of the Ready pulse on the trigger 5, the device is switched on to form and transmit its address in line 1.

Thus, an increase in the beat response is achieved due to the fact that in lines 1, addresses are formed in parallel for all subscribers ready for operation. But the first formed address becomes the address of the subscriber that has the highest priority. After the double propagation time in lines 1, the next in priority code of the subscriber is generated.

The proposed principle of address generation of the next priority subscriber does not spend time on

45 analysis of the priorities of the subscribers ready for operation, and the next highest priority address is generated automatically in the shortest possible time (double propagation time

50 in lines 1), no matter how large the sequence of binary bits would contain the address code. The time it takes to generate a subscriber code with address 1011 requires four cycles, and codes

The 55 subscribers with lower priorities finally form the Nia on each subsequent cycle. Thus, with a large number of subscribers

I can achieve the greatest effect, where at each clock cycle the subscriber with the highest priority among all ready-to-work subscribers is put into operation.

The use of the proposed device significantly increases the bandwidth of the communication channel.

Claims (1)

 Invention Formula A device for prioritizing subscribers, containing the first and second address generation units, the first inputs of the first and second address generation units being connected to the appropriate communication lines, the ready trigger and the initial setting unit, characterized in that, in order to increase the speed of electing . ntovy entered block formation 32764 6 EIG signals, shift register  and the driver of the end of the address, the output of which is connected to the input of the setup block, 5 the output of which is connected to the control input of the shift register and the input of the ready trigger, the output of which is connected to the control inputs of the first and second formation units 10 addresses whose outputs are connected to the corresponding first inputs of the shift signal generating unit, the second inputs and outputs of which are connected to the corresponding outputs and 5 inputs of the shift register, the auxiliary output of which is connected to the input of the end address generator, 20 Sources of information taken into account in the examination one . US Pat. No. 4016539, cl. 340-147, 1977 (prototype). Fm. / L Address Address TsTlTT 7 clocks .. .. and .and and and and and and vV and and and and and and VU and and and ffviAilxvU and and and v, and and and and, and And i, h w 7 g "second subscriber l first subscriber of the third subscriber Figure 2