RU2642803C1 - Method of increasing reliability of digital message transfer - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: method contains steps, in which redundancy of the digital message is introduced by adding reference markers, for this purpose, prior to the start of the digital information signal transmission, the value of the reference markers that are entered and stored in the database of the hardware-software complexes included in the composition information network, and are not changed in the established time interval, then in the process of preparing the transmitted messages in the transmitting hardware-software complex, the digital message is formed in such a way that after each transmitted information signal "1" an additional reference marker is input through a known predetermined time interval smaller than the interval between the information signals, and after the transmitted information signal "0" through a predetermined time interval, the reference marker is not input, after receiving a digital message in the receiving hardware-software complex, analyzing the time intervals between the signals, the reference markers are extracted and the true value of the transmitted digital information signal is formed from the actually received message.

EFFECT: increasing the reliability of information transmission over a radio channel.

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Description

The invention relates to methods for increasing the reliability of the transmission of digital messages.

The invention can be used to increase the reliability of the transmitted information in various telecommunication systems, telecontrol and pattern recognition systems, monitoring systems for assessing the status of controlled dynamic objects, systems and macrosystems in various fields of activity, including global environmental monitoring, in robotics, formalization and presentation of knowledge about the state of dynamic objects in control systems for various purposes, information support The course of decision making and control.

Known methods for increasing the reliability of the transmission of digital data based on the artificial introduction of redundancy in the transmitted messages, control of the primary parameters of the received signals or their joint use. There are ways to increase reliability without feedback and with feedback. The methods of increasing reliability related to the first group are used in unidirectional communication systems. In communication systems, where it is possible to transmit information in both directions, methods of increasing reliability related to the second group are used [1. E.Sh. Goikhman, Yu.I. Losev. Information transfer to ACS. Ed. 2nd, add. and reslave. M., "Communication", 1976, p. 139].

Data transmission systems using a method of increasing the reliability of the first group are divided into systems with a simple code, with repeated repetition of the same information and using error correction codes. Repeated repetition is the easiest way to increase confidence. In this case, the true message is taken as the one that has the largest number of matches in a multiple received sequence. The disadvantage of this method is the low throughput and inefficient use of input redundancy [2. Kotov P.A. Improving the reliability of the transmission of discrete information. M., "Communication", 1972, p. 156].

Known methods for increasing the reliability of data transmission using the simultaneous transmission of the same information on several parallel communication channels. With two channels running in parallel, redundancy can be introduced into the transmitted messages, allowing you to find errors. The majority principle may also be used. In this case, the number of working channels should be at least three. The disadvantage of the multi-channel data transmission method is also the inefficient use of redundancy [3. Andronov I.S., Fink L.M. Discrete messaging over parallel channels. M., "Soviet Radio", 1971. 406 p.], [4. RF patent No. 2513725, IPC G06F 11/00. A way to ensure the integrity of the transmitted information].

Ways to increase reliability in data communication systems with feedback are divided into methods with decisive, informational and combined feedback. The disadvantages include significant losses in the speed of information transfer, low efficiency of the data recovery process [5. Shvartsman V.O., Emelyanov G.A. Theory of Discrete Information Transfer: A Textbook for Communication High Schools. M., “Communication”. 1979. 424 p.].

A known method of symbolic synchronization of radio telemetry systems in the time-frequency domain [6. A.I. Loskutov, A.A. Byankin, A.S. Dunikov, A.V. Parshutkin. Article, “University News. Instrument-making ”, 2014, T. 57, No. 10], which allows increasing the noise immunity of receiving telemetry information in promising ground-based receiving and recording stations of telemetric information. The method is based on the correlation classification of spectral images of binary symbols of a group telemetric signal and their boundaries. At the same time, the use of large dimensions of the fast Fourier transform is inefficient, since with a slight decrease in the probability of symbol reception errors, the computational cost increases significantly.

The disadvantage of this method is the use of complex methods of digital signal processing for synchronization, the complexity of the algorithms for recovering data after transmission and receipt at the receiver input.

The closest to solving the problem of ensuring reliable reception of information is the method of symbolic synchronization upon receipt of a code-pulse modulation signal - phase manipulation with a known structure [7. RF patent No. 2595952 C2, IPC G06F 17/14, Н04В 1/7073. The method of symbol synchronization upon receipt of a code-pulse modulation signal — phase manipulation with a known structure]. An increase in noise immunity and reliability in the transmission of information is achieved by applying a two-level processing circuit of the input signal: at the first level, binary symbols are searched for using the patterns obtained by calculating the spectral power density of the fragment of the analyzed signal and calculating the correlation coefficient of the patterns with the reference spectral image corresponding to the boundary binary characters at the second level using a two-channel subtractive demodulator circuit. Then, the spectral image is calculated and compared with the spectral image of the symbol based on the calculation of the correlation coefficient.

The disadvantage of this method is the use of complex methods of digital signal processing for synchronization, the complexity of the algorithms for recovering data after transmission and reception at the input of the receiver, as well as the complexity of signal processing in the mode of direct reception of information.

The objective of the present invention is to increase the reliability of the transmission and recovery of a digital message, regardless of the type of interference acting on it.

The technical result consists in increasing the reliability of transmission and restoration of a digital message based on a new sequence of operations that ensure the formation of a set of standards on the transmitting side and the selection on the receiving side of the useful value of the transmitted digital information signal from the received noisy digital message, regardless of the type of interference acting on the signal in communication lines.

The solution of the problem and obtaining a technical result is provided by introducing new methods into the known method, providing a change in the order of formation, form of transmission, as well as the content of the operations of receiving and processing messages, which significantly distinguishes the proposed from known methods, namely:

1) before the start of the transmission of the digital message, the value of the standard, which does not change in the required time interval, is established and brought to the participants of the information interaction;

2) the set value of the standard (UE) is entered and stored in the database of hardware and software systems (AIC) that are part of the information network;

3) they use UZE when preparing transmitted and processing received messages during the required time interval of information interaction;

4) for the organization of reliable information interaction of the agro-industrial complex, orienting markers that are multiples of the standard value, after a time interval τ1, are added to the structure of the message intended for transmission;

5) after receiving the message, the duration of the time interval between the signals is analyzed, orienting reference markers located through the interval τ1 are determined, and the true value of the transmitted digital signals is extracted.

To solve this problem, a methodological technique is used - the addition of reference orienting markers. The essence of this method is to add reference markers after each “1” through a known time interval τ1.

When transmitting a digital message that includes an array of data in the form of a set of signals With _n (Fig. 1), which are "0" or "1", that is

.C = {C _n }, n = 1, ..., N, |

.

In accordance with the object of the invention, on the receiving side (PFP), it is necessary to separate the interference and highlight the true message generated in the transmitter (PFP).

To transmit information to the PRD form a message C = {C _n } according to the following rules (Fig. 2):

1) if it is required to transmit an information signal corresponding to “1” (C _n = 1), then after it through the time interval τ1 (τ1 <τ0, τ0 is the interval between information signals), the marker C _m is introduced;

2) reference marker With _m = K⋅E | (E = 1), where E is the standard, K≥ [1] is the integer of multiplicity specified before the start of the data transfer session and known at the receiving side;

3) if you want to pass "0" (C _n = 0), then after C _{n the} marker is not entered.

) по правилам:After receiving the message in the APC, the PfP analyzes the presence of a marker after a digital information signal (

) according to the rules:

через интервал τ1 обнаружен сигнал

вне зависимости от величины искаженного сигнала, тоif after

through the interval τ1, a signal is detected

regardless of the magnitude of the distorted signal, then

;

;

через интервал τ1 не обнаружен сигнал

вне зависимости от величины искаженного сигнала, тоif after

no signal detected in the interval τ1

regardless of the magnitude of the distorted signal, then

.

.

Thus, the proposed method, which consists in adding reference markers after each transmitted “1” at a known time interval, makes it possible to increase the reliability of information transmission regardless of the type of active interference and to restore the message content by introducing redundancy.

The analysis of the level of existing technical solutions made it possible to establish that there are no analogues that are characterized by a set of features identical to all the features of the proposed solution, which indicates the compliance of the claimed invention with the “novelty” protection criterion.

Search results for known solutions in this and related fields of technology in order to identify features that match the distinguishing features of the proposed method have shown that no solutions having features matching its distinctive features have been identified in publicly available information sources.

The prior art also does not confirm the popularity of the influence of the distinctive features of the claimed invention on the technical result indicated by the applicant, therefore, the claimed invention meets the condition of "inventive step".

That is, the task of increasing the reliability of the transmission of digital information is solved.

An example implementation of the method

When transmitting a digital message C, for example, the number "19", the next pulse message is generated (Fig. 3).

To increase the reliability of the transmission of a digital message in the APC APD after each information unit enter the reference marker With _m (Fig. 4).

After processing the received noisy message, in the APC AIM, reference markers are selected and a reliable digital message is generated according to the following rules: if another digital signal follows the digital information signal through the interval τ1, then the transmitted signal is identified as “1”, but if the received digital information signal does not the next digital signal follows through the time interval τ1 - the transmitted signal is identified as "0" (Fig. 5). Thus, the problem of reliable transmission and processing of a digital signal is solved.

Literature

1. E.Sh. Goikhman, Yu.I. Losev. Information transfer to ACS. Ed. 2nd, add. and reslave. M., "Communication", 1976, p. 139.

2. Kotov P.A. Improving the reliability of the transmission of discrete information. M., "Communication", 1972, p. 156.

3. Andronov I.S., Fink L.M. Discrete messaging over parallel channels. M., "Soviet Radio", 1971. 406 p.

4. RF patent No. 2513725, IPC G06F 11/00. A way to ensure the integrity of the transmitted information.

5. Shvartsman V.O., Emelyanov G.A. Theory of Discrete Information Transfer: A Textbook for Communication High Schools. M., “Communication”. 1979. 424 p.

6. A.I. Loskutov, A.A. Byankin, A.S. Dunikov, A.V. Parshutkin. Article, “University News. Instrumentation ”, 2014, T. 57, No. 10.

7. RF patent No. 2595952 C2, IPC G06F 17/14, Н04В 1/7073. The method of symbolic synchronization upon receipt of a code-pulse modulation signal — phase manipulation with a known structure.

Claims (1)

A method of increasing the reliability of digital message transmission, involving the artificial introduction of redundancy in the transmission of a digital message, including a sequence of digital information signals, characterized in that the redundancy of the digital message is introduced by adding reference markers, for this, before starting the transmission of the digital information signal, the value is brought to the participants of the information interaction reference markers, which are entered and stored in the database of hardware and software systems, which are part of the information network, and do not change in the specified time interval, then in the process of preparing the transmitted messages in the transmitting hardware-software complex, a digital message is formed in such a way that after each transmitted information signal “1” an additional reference marker is introduced after a known predetermined time interval shorter than the interval between information signals, and after the transmitted information signal "0" after a specified time interval, a reference marker is not entered, p receiving digital message follows in the host hardware-software package, was analyzed time intervals between signals, is isolated form the reference markers and the true value of the transmitted digital information signal from a received message is actually depending on the type and amount of interference acting on the transmitted message.

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