SU414749A1 - - Google Patents

Description

one

The device for phasing cycles of a multichannel system for transmitting discrete information can be used to temporarily compact a sampled telephone or group communication channel.

In known phase loing devices, either one code pattern not found in the transmission of information or a combination of several allowed combinations are used as phasing signals. In the latter case, the likelihood of this combination in the information should be minimal. In both cases, these combinations are transmitted at a certain timing of the operation of the distributor and at the same time one sector of the distributor is fully occupied corresponding to the channel of the system.

The disadvantages of the known devices are that the dedicated channel (sector) of the system is used only for phasing cycles (for both the above types of devices), in a high probability of false phasing (when the allowed combination turns into phasing) for a device of the first type, in a large time skew detection, due to the length of the combination, for devices of the second type.

The purpose of the invention is to increase the capacity of the device, achieved by

that in the transmitting clock the output of the sensor of the phasing combination through the input switching node is connected to the inputs of the distributor, and in the receiving part the communication channel through the key and the decoder of the phase combination is connected to the installation input of the distributor and the input through the Locking key to another key entry.

Sending and registering the phasing combination in the proposed device does not lengthen the transmission cycle, since to ensure the transfer of information without overlapping each other, each channel is switched somewhat more frequently than the arrival rate of the transmitted combinations. Therefore, in each channel, the information combinations will alternate with the rest combinations periodically.

At different speeds in different channels, for example, telegraph channels with a speed of 50 and 75 baud, the number of quiescent combinations will be greater for channels with a speed of 50 baud. Combinations may be transmitted instead.

phasing without reducing the total information transfer rate in the system. The imp is a diagram of the device. The device includes a sensor 1 phasing combination, to: mutation device 2 on

/ directions, transmitting 3 and receiving 4 distributors, counter 5 cycles, key 6 and decoder 7.

The transmitting 3 and receiving 4 distributors work synchronously, for each cycle the channels a - n are connected to the communication channel. Switching device 2 connects sensor 1 of the phase combination to the first / sectors of the distributor 3 once per K cycles and transmits the remaining K - 1 cycles these sectors information from the / first channels a, e, ... (fig.). For phasing, a combination U was chosen, which is characterized by a low probability of occurrence in the transmitted information. On the receiving side of the channel, the counter 5 cycles once in K cycles sends a signal to the opening input about key 6 and sets it to a position where information from the channel can be received through the information input of this key to the decoder 7. The latter selects the information contained in the received information phasing combination (/ is a multiple repetition of U). At the moment of receiving the reception of this combination, a signal is received from the decoder that resets and sets the receiving distributor to its original state and closes the key 6 at the forbidden input of h. Starting from this moment, for K cycles, the key remains locked. Therefore, combinations U, occurring in the transmitted information, do not cause false phasing (installation) of the receiving distributor 4. Through K cycles, the counter 5 reopens the key and, if the operation is in phase, the distributor 4 is fed to the installation impulse, only confirming the initial state of the distributor and lowering it the input is a key 6. In the event of a phase failure, the valve remains open until the reception of the next phasing combination. The load of the unified communication channel by transmitting the phasing signals is quite small and amounts to

14749

four

- from total throughput.

Cl

Download each of the communication channels used for phasing, is equal to, and also 5K

can be chosen small enough. In terms of K system in general, phasing takes - bandwidth of one k

10 cash In normal operation, false phasing is not possible. It can occur only at the moment of the failure or distortion of the phasing combination with probability (per 1 cycle)

P Pi (P.6 + JPn}

where Rsb is the probability of a distributor; where RP is the combination distortion probability in the communication channel;

PI is the probability of a phenomenon in the text of the combination selected as phasing.

Subject invention

A phase locking device for a multichannel system of non-transmitting discrete information with time division multiplexing, consisting of a transmitting part containing

a phasing combination sensor and a distributor, and a receiving part containing a phasing combination decoder, a key and a distributor, characterized in that, in order to increase the transmission capacity,

in the transmitting part, the output of the sensor of the phasing combination through the input switching node is connected to the inputs of the distributor, and in the receiving part, the communication channel through the key and the decoder of the phasing combination connect to the installation input of the distributor and the input "Disable key, and the output of the distributor through the cycle counter to another input key. Dedicated Nanals from the temporary OLYA leredachts, informat Iats and Vyde / No.nna nana / s Temporary division for reception and formation