SU1197124A1 - Device for estimating conditions of channels in simplex communication systems - Google Patents

Description

comes when the requesting combination is received from the governing body. The type of such message is detected with analyzer (A) 19, which is. built on a combination of request. The output signal from A 19 goes to W 15, reading the readings of the meters 11-13 (emergency or normal) in P 16. 2 Il.

The invention relates to telecommunications and can be used in data transmission systems while simultaneously monitoring the state of simplex channels. The purpose of the invention is to reduce the time required to determine the emergency state of communication channels. On; FIG. Figure 1 shows the electrical circuit diagram of a device for evaluating the state of channels in simplex communication systems; in fig. 2 illustrates embodiments of a code signal sensor and a memory block. A device for assessing the state of channels in / simplex communication systems contains a block of 1 memory, a valve 2, a counter 3 repetitions of transmissions, elements 4-6 of memory, basic elements AND 7-9, an analyzer of 10 receipts, counters 11-13 messages, a descrambler 14, an encoder 15, a distributor 16 | an additional element And 17, a sensor 1 of code signals and a request analyzer 19. The code signal sensor 18 is composed of a pulse sensor 20, a divider 21, a decoder 22, and an inverter 2 Memory block 1 consists of a write - read block 24, a memory 25, And 26, an address block 27, an information end analyzer 28, a sync block 29 , sensor 30 code signals, elements OR 31 and 32. The device operates as follows. : From the equipment for data transmission (TL) to the memory block 1, the information is recorded as a formalized message consisting of a header and an information part. After recording the service attribute The end of the information defining the end of the recording, the information is read into the communication channel. The reading of information is carried out until a signal appears at the output of the memory block 1. The end of information that goes to the valve 2 and the repetition counter 3 of the transmissions. Counter 3 is constructed in such a way that the signal End of information with. its first output enters the control input of valve 2 with delay OIL. The value of t is chosen somewhat greater than the value of t — the maximum waiting time for a receipt for a message transmitted to the communication channel. If, during tj, a receipt is received for the transmitted message, it will go to analyzer 10, the output from which will reset counter 3 to its original state. The transmission of the message to the communication channel is over. If there is no receipt for the transmitted message within the time t. the signal from the second output of counter 3 opens valve 2, the sign End of information, having passed through valve 2, is written to the repeat input of memory block 1, the message is replayed to the communication channel. After the repetition cycles expire, the counter 3 will be reset to the initial state and the message transfer process will be completed. After the first transmission of the message to the communication channel, the counter 3 changes its initial state to 1. As a result, the signal from its first output will start the sensor 18 of the code signals and, in addition, will open the element And 17 to pass information from the additional output of memory block 1 ti. Sensor 18 of the code signals with its output signals from the first and second outputs will ensure that only the address indications of the message are written to the decoder 14. Since the signal from the first output of counter 3 appears only when the first signal arrives at its input, then the information is written to the decoder 14 will be disposable. Initially, the address indicia, which are drunk in the decoder 14, ensure the installation of the memory elements in the initial (zero) state. Then, in accordance with the address recorded in the decoder 14, a signal will arrive at one of the counters 11-13. The address feature is memorized by one of the 4-6 memory elements. The number of counters 11-13 and elements 4-6 of memory corresponds to the value of K — the number of addresses, channels or subscribers in the communication network. The frequency of processing and reading the address tags in memory block 1 is selected on the basis of calculation in order to receive the receipt of the receipt of the address signals in the counters 11-1.3. We denote by n the maximum number of repetitions of the transmission of the same message, through, m the maximum number of messages, data transfer is added to one of the channels for which no receipts were received and after which the channel is considered an emergency one. Let a receipt be sent to the transmitted to the communication channel from the first, second, or n-th time of the message by the receiver. It is about the amp & analyzer 10. The analyzer's Q signal goes to the inputs of elements AND 7-9 and passes to the reset input of one of the counters 11-13 through that AND element, at the second input of which there is currently a single signal from the output one of the elements of 4-6 memory. If there is no vacancy, the state of the meters 11–13 will not change. If there are m messages with the same address and no receipt has been received for any of them, one of the meters 11–13 will work. The operation of counters 11–13 wits is a sign of the emergency condition of the channel. Thus, a sign of an emergency channel condition is a failure to pass m messages at the same address, if the Kalorisorption is repeated n times. The magnitudes m and n are preset in the device in advance, depending on the type of the 1 44 channel (wired, radio) based on statistical data, etc. The device provides two. mode of operation. The first mode is the automatic generation of a service message to the control authorities upon detection of an emergency condition of the communication channel; the second mode is the formation of a service message on the state of communication channels upon a request from the ALD ... . In the first mode, when a single signal appears on one of the outputs of counters 1.1-13, the encoder 15 will generate a two-voice sequence that corresponds to the direction or channel number in the alarm state nii. These signs are entered into the valve 16. Along with the address signs, the operator enters the permanent signs into the valve 16 of the other input (input Input): the sender's address, urgency category, etc. The message thus generated is sent to the service output and brought to bodies, where organizational and other measures are taken to improve communications. In the Lt. mode, the formation of such a message occurs when a request combination arrives from the control authority. The type of such a formalized message is detected by the analyzer 19, which is configured for a combination of Query located at one of the positions of the format of the specified message. The output signal from the analyzer 19 enters the cipher 15, reads the counters 11-13 with an emergency or normal} into the distributor 16. An example of the implementation of the sensor 18 of the code signals and its interaction with the memory unit 1 is shown in FIG. They work as follows. The information in the accumulator 25 together with the write and read signals is recorded from the ADF via the write-read block 24 of the drive. The write-off block 24 is an intermediate link that provides for the exchange of information between the drive 25 and the elements of the ADF.

The address for writing C, reading in on storage device 25 is determined by address block 27, to the input of which code pulses (combinations) are received from the ADF via OR 32 element. The mode of recording or reading information in the storage unit 25, as well as managing all the writing or reading processes, is determined by the synchronization unit 29 using input signals from the ADF arriving at the input of the OR element 31. As soon as the first signal arrives at counter 3 and change its initial state, the pulse sensor 20 starts up. The continuous sequence of bone 1 goes to divider 21. The elements of divider 21 will change their state to form code combinations. Code combinations from the output of counter 21 are passed through the OR 32 element to the input of address block 27, by which the address of the desired cell is selected. in drive 25.

The signals at the output of the decoder 22 will appear in the event that the input code combination led will correspond to the address cell of the accumulator 25 where the address indications of the input message are stored. The signals from the output of the divider 21 coming to the address block 27 together with the signals from the output of the decoder 22 provide, in a known way, reading only the address indications of the entered message from the accumulator 25. The specified address indicia arrive at the output of the device, since the sequence of the pulse 1 is continuous does not arrive at the second input of the element AND 26 due to the presence of the inverter 23, and therefore the element AND 26 during the reading of the address signs is closed. Generating a predetermined number of code combinations, determined by the volume of address signs entered in the message accumulator 25, the output signal from divider 21 will reset the sensor 20 pulses

End: output of information from memory block 1 will trigger the analysis of the end of information torus 28 and, under the conditions described above, will trigger sensor 30 of code signals. Analyzer 28 includes a delay line that will ensure maintaining a high level of the output signal during wait time Sensor 30 is built similarly to sensor 18 code signals (without inverter 23). Upon receipt at the input of sensor 30, the signal from the output of valve 2 is re-calculated

tishanie information from memory block 1.

Claims (1)

Invention Formula A device for estimating channel conditions in simplex communication systems, comprising a series-connected memory block and a valve, the output of which is connected to the repeat input of a compact, the main elements of AND, whose outputs are connected to the reset inputs of message counters, and a receipt analyzer , the output of which is connected to the first I the input of one of the main elements AND about aphids, in order to reduce the time for determining the emergency state of the communication channels, the serially connected transmission repeat counter, the additional AND element and the decoder, whose parallel outputs are connected to the counting inputs of the message counters, are connected. request analyzer, encoder, the other inputs of which are connected to the outputs of the message counters, and the distributor, the encoder sensor, the outputs of which are connected to the address, control and auxiliary inputs of the block the memory, the main output of which is connected to the counting input of the repetition transmission counter, the reset input of which is connected to the output of the receipt analyzer and the first input of the remaining main elements And, the memory elements connected between the parallel outputs of the decoder and the second inputs of the main elements And, the additional output of the decoder is connected to the dumping inputs of the memory elements, the first output of the repetition counter connect to the encoder input of the code signals the second output is connected to the control the input of the valve, the input of the request analyzer is connected to the information input of the memory unit, the additional output of the sensor is connected to another input of the additional element I. Record Output