RU2669535C1 - Method of external quality control of communication services provided by network - Google Patents

Abstract

FIELD: communication equipment.

SUBSTANCE: invention relates to communication equipment. Method of external quality control of the services provided by the communication network consists in setting measurement object; transmitting and receiving pulse sequence; detecting bit errors; counting their number; setting additional initial data: pairs of correspondent subscribers; test sequence known to a given pair of subscribers consisting of K bits, the required probability of a bit error (P_err); periodicity (T_me) of measuring the probability of a bit error (P_err) at the maximum transmission rate (V_{max tr}); in a continuously functioning network, under real operating conditions, transmitting and receiving test sequence between a pair of correspondent subscribers at the maximum transmission rate (V_{max tr}); calculating probability of a bit error (P_err) of the test sequence; memorizing in the matrix (M) their probability values in the information direction; compare values of the required bit error probability (P_{err re}) with bit error probability values (P_err) of the test sequence and form a signal confirming the quality of the communication services provided.

EFFECT: increased reliability of information on the quality of the communication services provided.

1 cl, 4 dwg

Description

The invention relates to communication technology, and in particular, to control methods and can be used to control any element of the communication network by service consumers without stopping any element of the communication network and attracting special measuring equipment.

Various methods are known from the prior art for determining the presentation of a data transfer service, but there are no methods for presenting to consumers of communication services objective data on the quality of the services provided without interfering with the functioning of the network.

A known method for diagnosing the state of communication networks [Grechishnikov E.V., Belov A.S., Ivanov V.A., Konishchev A.N., Kosyakin A.V. RF patent No. 2340095 C2, class. Н04В 3/00, publ. November 27, 2008], providing improved diagnostic results due to the control of the correct choice of frequency band.

The disadvantage of this method is the limited scope. In addition, control results indicate only critical parameter values. There is no way to determine the quality of network functioning by service consumers.

There is a method of providing the ability to control the context of a non-real-time data connection of a subscriber of a cellular mobile communication network [RF Patent No. 2381634 C2, class. H04W 24/00, publ. December 27, 2011]. The method consists in monitoring non-real-time data connection contexts by establishing a subscriber signaling context with a mobile network as a real-time signaling context, and in case of a set interruption of a subscriber real-time signaling context, a decision is made to interrupt one or all transmission connection contexts subscriber data.

The disadvantage of this method is the limited scope. In addition, the monitoring results indicate only interruption detection, not in real time, without taking into account all destabilizing factors.

A known method and communication system for controlling the flow of data in a data network [RF Patent No. 2280331 C2, class. H04l 12/26, publ. April 10, 2005]. The method consists in the ability to control the flow of data in a data network at the request of the legislature.

The disadvantage of this method is the limited scope. The monitoring results indicate only the so-called “legal interception” in data transmission networks, for example, the Internet.

Closest to the proposed method is the method described in the book [Vlasov II, Ptichnikov MM Measurement in digital communication networks / Ed. A.P. Kozina. 2nd ed., Rev. and add., Moscow: Postmarket, 2005. p. 171-174], which consists in the fact that set the measurement object; stopping communication; transmit a pulse sequence; take a pulse sequence; detect bit errors; count the number of bit errors. The method is based on the fact that the most accurate option for organizing transmission quality control is an option based on the detection and calculation of bit errors. However, its implementation is possible only in the measurement mode with communication stop. In addition, the procedure of bitwise comparison of the transmitted and received pulse sequences requires the organization of loops and a comparatively complex circuit implementation of measuring instruments.

Thus, the disadvantage of the prototype method is that its implementation is possible only with communication interruption and the use of special measuring instruments, when detecting and counting bit errors only the physical characteristics of the tested element are taken into account, the quality of the presented communication services is evaluated only by the organizer of the provided services.

The developed method is aimed at solving a technical problem, which is to provide consumers of communication services with objective data on the quality of the services provided without interfering with the network functioning process.

In the framework of solving a technical problem, a technical result is achieved, which consists in obtaining reliable information about the quality of the provided communication services without stopping any network element in the conditions of all the influencing factors.

The technical result is achieved by the fact that in the known method, which consists in setting the measurement object; transmit a pulse sequence; take a pulse sequence; detect bit errors; count the number of bit errors, additionally set the initial data: pairs of corresponding subscribers; a test sequence known to a given pair of subscribers, consisting of K bits, the required probability of a bit error P _Osh ; the frequency (T _ISM ) of the measurement of the probability of a bit error R _OS at the maximum transmission speed V _{m a x per} ; in a continuously functioning network, under real operating conditions, a test sequence is transmitted and received between a pair of corresponding subscribers at a maximum transmission speed V _{m a x per} ; calculate the probability of a bit error _{Psh of the} test sequence on the communication network; storing in the matrix M the probability values of the bit error _{Psh of the} test sequence in the information direction; comparing the values of the required probability of bit error Р _Оштр with the probability of bit error Р _{Ош of the} test sequence, if the values of the probability of bit error Р _{Ош are the} same or less than the values of the probability of bit error Р _Ошр , the communication network meets the requirements of a given quality of service for a given pair of correspondents , and generate a signal confirming the quality of the presented communication services, if the values of the probability of a bit error P _{Ош are} higher than the values of the required probability of a bit error Р _{Ош tr} then form a signal about the mismatch of the quality of the provided communication services.

The analysis of the prior art made it possible to establish that analogues that are characterized by a combination of features that are identical to all the features of the claimed solution are absent, which indicates the compliance of the claimed method with the condition of patentability "novelty". Search results for known solutions in this and related fields of technology in order to identify features that match the distinctive features of the prototype of the claimed method showed that they do not follow explicitly from the prior art. The prior art also did not reveal the popularity of the impact provided by the essential features of the claimed invention, the transformations on the achievement of the specified technical result. Therefore, the claimed invention meets the condition of patentability "inventive step".

The claimed method is illustrated by drawings, which show:

FIG. 1 is a flowchart of a method for external quality control of services provided by a communication network;

FIG. 2 is a drawing illustrating a measurement object and a pair of corresponding subscribers;

FIG. 3 is a drawing illustrating a test sequence consisting of K bits;

FIG. 4 is a drawing illustrating a received test sequence with an error consisting of K bits.

The claimed method can be implemented as follows (Fig. 1).

Pre-set as the source data (bl. 1 Fig. 1):

- object of measurement (Fig. 2);

- a pair of corresponding subscribers (Fig. 2);

- a test sequence known to a given pair of subscribers, consisting of K Bits (Fig. 3);

- the required probability of a bit error R _OS ;

- the frequency (T _ISM ) of measuring the probability of a bit error R _OS at a maximum transmission speed V _{m a x per} .

By the measurement object, we mean a functioning communication network with many parameters, namely:

- the number of nodes

- connectivity

- quality of communication lines,

- type of routing,

- protocol parameters.

- the required probability of a bit error R _osh [ITU-T Rec. Y.1541 “Requirements for network performance metrics for IP-based services”].

In a continuously functioning network, under real operating conditions, a test sequence is transmitted and received between a pair of corresponding subscribers at a maximum transmission speed V _{m a x nep} (bl. 2 of Fig. 1, Fig. 3, Fig. 4). The test sequence contains a binary sequence of random numbers, with a uniform distribution law.

Next, bit errors are detected and their number is calculated (bl. 3, 4 of Fig. 1).

The probability of a bit error _{Rsh of the} test sequence on the communication network is calculated (Fig. 4). [Probability Theory: A Textbook for Stud. Universities / E.S. Wentzel. - 10th ed. - M.: Publishing Center "Academy", 2005] (bl. 5 Fig. 1).

The frequency (T _ISM ) of taking measurements of the probability of a bit error P _Osh at a maximum transmission speed V _{m a x per} is chosen arbitrarily.

Next, the values of the probability of a bit error _{Rsh of the} test sequence in the information direction are stored in the two-dimensional matrix M (block 6 of FIG. 1).

A matrix is a collection of data, each value of which depends on its location in a row and in a column, each element of the matrix is described as A (i, j), where:

A (i, j) is the value of the matrix element;

A is the name of the matrix;

i is the line number characterizing the value of the time taken to measure the bit error probability;

j is the line number characterizing the value of the probability of a bit error.

Compare the values of the required probability of bit error Р _Ошр (bl. 7 of Fig. 1) with the values of the probability of bit error Р _{Ош of the} test sequence, if the values of the probability of bit error Р _Ош coincide or are less than the value of the probability of bit error Р _{Ош Tr} , then the communication network satisfies requirements of a given quality of service for a given pair of correspondents and a signal is generated (bl. 8, FIG. 1), confirming the quality of communication services submitted, if the values of bit error probability P higher than the desired _oui the probabilities and bit error rate P _{err mp} then generated an inconsistency signal quality of reported communication services (bl. 9, FIG. 1).

Thus, thanks to a new set of essential features in the claimed method, it is ensured that consumers of communication services provide external, independent and objective control over the quality of the services provided without stopping any element of the network, without the use of special measuring instruments, under the conditions of all influencing factors.

Claims (1)

The method of external quality control of the services provided by the communication network, which consists in setting the measurement object; transmit a pulse sequence; take a pulse sequence; detect bit errors; count the number of bit errors; characterized in that it additionally sets the initial data: pairs of corresponding subscribers; a test sequence known to a given pair of subscribers, consisting of K bits, the required probability of a bit error ( _Psh ); the frequency (T _ISM ) of taking measurements of the probability of a bit error ( _Psh ) at a maximum transmission rate (V _{max per} ); in a continuously functioning network, under real operating conditions, a test sequence is transmitted and received between a pair of corresponding subscribers at the maximum transmission speed (V _{max per} ); calculate the probability of a bit error ( _Psh ) of the test sequence on the communication network; storing in the matrix (M) the values of the probability of a bit error ( _Psh ) of the test sequence in the information direction; compare the values of the required probability of bit error (R _{OS Tr} ) with the values of the probability of bit error (R _OS ) of the test sequence, if the values of the probability of bit error (R _OS ) match or less than the value of the required probability of bit error (R _{OS Tr} ), then the communication network satisfies the requirements of a given quality of service for a given pair of correspondents, and they generate a signal confirming the quality of the provided communication services if the probability of a bit error ( _Rsh ) is higher than the value of the required probability of a bit error and (R _{osh tr} ), then form a signal about the mismatch of the quality of the provided communication services.

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