Communication network simulation method

FIELD: physics; communications.

SUBSTANCE: invention relates to simulation and can be used in designing radio-electronic, engineering systems for evaluating operational characteristics. The outcome is achieved by measuring performance indices of a real communication network, simulating functioning processes of the simulated communication network and comparing the values.

EFFECT: possibility of simulating movement of communication network elements (nodes and communication devices) and subscribers (users) of the communication network; simulation of features of physical and geographical conditions of the region where the communication network is operating and where subscribers (users) are located; simulation network topology changes, change in communication channel (line) capacity; as well as increased simulation adequacy taking into account functioning processes of a real communication network.

7 dwg

 

The invention relates to the field of modeling and can be used for designing electronic, technical systems for evaluation of performance.

Interpretation of terms used in the application: network communication - technological system that includes tools and communication line and designed for telecommunications (Federal act of 16 February 1995, No. 15-FZ "On communications" (with amendments as of January 6, July 17, 1999). Adopted by the State Duma on 20 January 1995).

Known simulation method implemented in the device (the invention the Device for simulation of communication systems", patent of Russian Federation №2251150, G06G 7/48, published 27.04.2005, bull. No. 12). The method consists in modeling mode, bringing the circular message from the main station to the N subscribers and mode confirmation information from subscribers to the main station in terms of failures and restores communication lines in each direction of communication.

However, in similar there is no possibility of surgical correction of the simulated communication network relative to functioning in real time taking into account the following factors:

- move network elements (nodes and communication);

- the specific physico-geographical conditions of the area where the functioning of the communication network;

- changes in the structure of the communication network depending on external influences.

Known simulation method implemented in the device (the invention the Device for simulation of communication systems", patent of Russian Federation №2286597, G06G 7/62, NV 7/24, published 27.10.2006, bull. No. 30). The method consists in the generation of pulses for transmission over the communication system, the generation and storage of uniformly distributed random number ξ which determines the number N of selected communication channel, which will promote the exchange of information between subscribers, a record of the number N of the communication channel, forming and writing the state of the Markov chain for the m channels, the generation of the pulse packet m number of channels, circulation (reading) the conditional error probability p according to the status code, checking the conditions p+ξ>1, if the sum of uniformly distributed random number ξ and the conditional error probability p is greater than unity, which corresponds to the error signal, information is generated about the errors in m channels, switches the working channel (simulation of failure in the channel), if the working channel error has not occurred, then switch the working channel (simulation of failure in the channel) will not happen, is the imitation of communicating information to each customer taking into account the reliability of the communication line, calculates the probability of communication lines.

However, in similar there is no possibility of surgical correction modes is controlled communication network relative to functioning in real time taking into account the following factors:

- move network elements (nodes and communication);

- the specific physico-geographical conditions of the area where the functioning of the communication network;

- changes in the structure of the communication network depending on external influences.

The closest to the technical nature of the claimed method is a method that is selected as a prototype, implemented in the device (the invention the Analyzer communication networks" G06F 11/25, G06F 15/173, published 27.11.2007, bull. No. 33). Prototype method consists in forming the graph investigated probabilistic network, the entries in the registers of the generators of pseudorandom sequence of values of the probability of the existence of the i-th vertex of the network, record the code number of the planned experiments, the formation of a pseudo-random number sequences, the distribution of which corresponds to the sudden failures of vertices of the network, forming the sequence of pseudorandom numbers, the distribution of which corresponds to a gradual failure of the vertices of the network, forming the sequence of pseudorandom numbers, the distribution of which corresponds to a failure of the branches of the network resulting from external influences, the result is the formation in each of the experiments of the graph, which may exist or may not be the path from the source graph each with the United vertices.

However, in the method prototype there is no possibility of surgical correction of the simulated communication network relative to functioning in real time taking into account the following factors:

- move network elements (nodes and communication);

- the specific physico-geographical conditions of the area where the functioning of the communication network;

- changes in the structure of the communication network depending on external influences.

The technical result of the invention is to empower the prototype method, i.e. simulating movement of elements of communication networks (nodes and communication) and subscribers (users) of communication networks; modeling specific physico-geographical conditions of the area where there is a network connection and are the subscribers (users); simulation of changes in the network topology changes in the capacitance of channels (lines) connection, increasing the adequacy of the simulation taking into account processes of the functioning of a real network connection.

The technical result is achieved by the fact that in the known method the simulation of communication networks, which consists in forming the graph investigated probabilistic network, the entries in the registers of the generators of pseudorandom sequence of values of the probability of the existence of the i-th vertex of the network, record the code number of the planned experiments, f is frmirovanii sequence of pseudo-random numbers, the distribution law of random numbers which corresponds to the sudden failures of vertices of the network, forming the sequence of pseudorandom numbers, the distribution law of random numbers which corresponds to the gradual failure of the vertices of the network, forming the sequence of pseudorandom numbers, the distribution law of random numbers which corresponds to the failure of the branches of the network resulting from external influences resulting in the formation of each of the static experiments the graph, which may exist or may not be the path from the source graph to each of the connected vertices, additionally measured values of the functioning of the real communication network, simulate the network topology changes, mimic the movement of the elements of communication networks, simulate the process of operation of the simulated communication network, the results of which count time timely customer service of the simulated communication network and conduct measurement time values timely customer service on a functioning network connection, compare the value of real time timely customer service with the required value, if the value of real-time timely customer service does not exceed the requirements, processes simulate operation modeled is the first network and a time dimension timely customer service in real networks continue if not, it is checked whether the change in the structure of real networks, if changes are needed, there will be changes to the parameters of the real communication network, such as the timing of changes in the structure of real networks, then calculate the difference between the real and simulated time changes in the communication network, which is compared with the desired value, if the difference does not deviate from the requirements, then continuing with the modeling of communication networks and measurement time timely customer service to the real communication network, if the difference exceeds the requirements, the adjustment of conditions that simulate the changes in the structure of the simulated communication network, if the changes to the structure of real networks communication is not needed, verifies the necessity of a backup means of communication, if there is such a need, real networks entered a backup means of communication and to measure the time of their introduction, simultaneously simulates the process of introducing a backup means of communication and calculated the time of their introduction on the simulated communication network, calculates the difference between the actual and simulated values of time of the introduction of a backup means of communication, which is compared with the desired value, if the value of this difference exceeds requirements, adjustment of conditions of imitaz and the introduction of a backup means of communication on the simulated communication network, if necessary, the introduction of a backup means of communication not, then checked the maintenance of the means of communication of a functioning network connection, if repairs need to be performed to repair a means of communication for real communication network and a simulation of this process on the simulated communication network, when this is measured during the repair of means of communication on real networks and calculated the time of repair of means of communication on the simulated communication network, calculates the difference between the real and the simulated values for the time of repair of means of communication, this difference is compared with the desired value, if the difference exceeds the desired value, the adjustment of conditions that simulate the repair of means of communication on the simulated communication network, if the need for repair no means of communication, there shall be a supply of necessary spare communications for real communication network and at the same time imitation of this process, the system calculates the difference between the real and the simulated time of delivery of spare communications, which is compared with the desired value, if the difference exceeds the desired value, the adjustment of conditions that simulate the spare communications for the simulated network connection.

The analysis of the level of technology has allowed to establish that the analogues, x is rasterizes sets of signs, identical to all features of the claimed method, no. Therefore, the claimed invention meets the condition of patentability "novelty".

Search results known solutions in this and related areas of technology in order to identify characteristics that match the distinctive features from the prototype features of the claimed invention, have shown that they do not follow explicitly from the prior art. Of certain of applicant's prior art there have been no known impact provided the essential features of the claimed invention to the achievement of the technical result. Therefore, the claimed invention meets the condition of patentability "inventive step". "Industrial applicability" method due to the presence of elemental basis, on the basis of which can be performed by devices that implement this method.

The claimed method is illustrated by drawings on which is shown:

figure 1 - algorithm for modeling communication network;

figure 2 - the process of selecting a coordinate area of deployment floating element of the communication network;

figure 3 - the process of functioning of the communication network;

figure 4 - structure of the investigated communication network;

5 is a matrix describing the elements;

6 is a matrix group elements;

Fig.7 is an example of creating a matrix of ways successful funk is ionirovanija (POOF).

To implement the claimed method can be in the form of a simulation algorithm presented in figure 1.

In block 1 enter the main source of data:

- the number and categories of subscribers;

- the number of nodes, lines of communication, channels of communication;

- the laws of distribution of random events;

- the species and the nature of the modeled impacts.

In unit 2 measurement of performance characteristics of a real network connection.

In block 3, the modeling of the topology and structure of the communication network. The deployment topology of the network elements of communication (CC) presents with several N groups of elements of the SS. For each group of elements is the generation of the coordinates of the regions of their location.

The first group consists of the elements of the SS, the location of which is limited only by the area of location of the subscribers of the communication network. View their coordinates provided by relations:

where- coordinate element SS (X axis);

- coordinate element SS Y;

- minimum and maximum element removal of SS from the subscriber location (subscribers) with regard to acting (acting) factor (X axis);

- minimum and maximum element removal of SS from the subscriber location (subscribers) with regard to acting (acting) factor on the Y axis;

Da 0.1is a random number distributed on the interval (0, 1), which is obtained by using a random numbers generator.

The second group includes the elements of the SS, the coordinates of which depend on the position of the elements of the SS 1-th group. Imitation of their areas by using expressions:

wherethe coordinates of the area of deployment of elements of the SS 1-th group;

- minimum and maximum element removal SS 2nd group from the 1-St group (X axis);

- minimum and maximum element removal SS 2nd group from the element of the 1st group on the Y-axis;

α is the angle that defines the location of the item SS 2nd group relative to the element SS 1-th group.

The third group consists of the elements of the SS, the locations of which are correlated with the coordinates of the elements of the SS 2nd group.

N-th group consists of the elements of the SS, the locations of which are correlated with the coordinates of the elements of the SS N-1 groups. Imitation of their areas is carried out with what omashu expressions:

where,the coordinates of the area of deployment of elements of SS N-th group;

the coordinates of the area of deployment of elements of SS N-1 groups;

- minimum and maximum element removal SS N-th group element N-1 groups (X axis);

- minimum and maximum element removal SS N-th group element N-1 group Y;

β is the angle that defines the location of the item SS N-th group relative to the element N-1 on the y axis.

Simulation coordinate the deployment of elements of SS all groups is carried out sequentially from the groups with the lowest numbers to the groups with the highest in ascending order.

The structure of the simulated network can be described according to the prototype (the invention the Analyzer communication networks", G06F 11/25, G06F 15/173, published 27.11.2007, bull. No. 33).

In unit 4, the simulated operation of a communication network. The structure of the investigated networks (figure 3) is considered as a set ofbipolar systems. Poles in the bipolar systems are subscribers of the communication network. Information link direction (Ann) (caller-Abona is t) is serviceable if there is at least one PUFA from one subscriber to another (simulation tools and communication systems and automation. Ivanov E.V. SPb.: YOU, 1992).

For example, Ann (subscriber 1 subscriber 2) the following POUF with nodes of the communication network:

1) 1; 2; 3; 5; 7; 8;

2) 1; 2; 3; 4; 5; 7; 8;

3) 1; 2; 3; 5; 8;

4) 1; 2; 3; 4; 5; 8;

5) 1; 2; 6; 5; 8;

6) 1; 2; 6; 5; 7; 8.

If there is at least one PUFF of the above, then Ann (subscriber 1 subscriber 2) is operational and the network connection for the specified group of subscribers to perform their functions.

In block 5 is a time dimension timely customer service on live network connection.

In block 6 is checked the ending time of the simulation. Unit 7 checks whether the time timely customer service desired values. If the requirements are met, then control is transferred to blocks 4 and 5, if not, then at block 8.

Unit 8 simulates the check for the need to change the structure of the communication network. If changes are required, then control is transferred to blocks 9 and 10.

In block 9 is the change in the structure of real networks.

In block 10 simulates the process of changing the structure of the simulated network connection.

The source data for modeling the changing coordinates of the network element communicationand are the motion parameters: the speed of the network element connection - ν; heading angle Θ of the motion element of the communication network or the projection of the velocity vector:

When you do this:

where t is the time travel element of the communication network;and- coordinates of the last placement element of the SS.

The simulated values of the travel time of the network element from one position to another is accomplished by the formula:

where tcf- the average travel time of the network element from one position to another.

The process of selecting a coordinate area of deployment of the roaming network element of the connection (figure 2) is iterative in nature. The rule of the shutdown procedure of the choice of coordinates uses the criteria:

where RKPI, jterritorial separation between the i-th position of the floating element of the communication network and the j-th position of interacting with this element of the communication network other elements;

Rmax- the maximum possible territorial spacing;

troom servicethe time timeliness of customer service (subscribers);

- required time early the items subscriber service (subscribers).

Block 11 is the time dimension changes in the structure of real networks. In block 12 is the timing of changes in the structure of the simulated communication network. Next, in block 13 is estimated difference between the time changes in the structure of real networks and the changes in the simulated communication network. In block 14 the following condition is checked between the measured and desired time difference Δt2≤ ∆ T2Tr. If the condition is not met, then in block 23 are used for correction of conditions that simulate the changes in the structure of the simulated communication network, if the condition is true, then control is transferred to blocks 4, 5. If the change in the structure of the communication network is not required, then control is passed to block 15, which checks whether the introduction of a backup means of communication. If the introduction of a backup means of communication is not required, then control is passed to block 24. If the introduction of a backup means of communication is required, then control is transferred to blocks 16 and 17.

In block 16 is the introduction of a backup means of communication in real networks, in block 17 - imitation introducing backup means of communication on the simulated communication network. In block 18 the measurement time of the introduction of a backup means of communication, real communication network, in block 19 the timing of the introduction of a backup means of communication on the simulated communication network. the alley in block 20 is estimated difference between the time of the backup means of communication, real communication network and the time of the backup means of communication of the simulated communication network. Unit 21 checks the condition between the measured and desired time difference Δt1≤ ∆ T1Tr. If the condition is not met, then in block 22 are used for correction of conditions that simulate the introduction of a backup means of communication on the simulated communication network, if Yes, then control is transferred to blocks 4, 5.

In unit 24 checks whether the repair of means of communication. If not, then control is transferred to blocks 32 and 33. In block 32 is the supply of spare communications for real communication network, in block 33 - imitation spare communications for the simulated communication network. Next, in block 34 is estimated difference between the delivery time of spare funds real communication network and the delivery time of spare funds simulated communication network. Unit 35 checks the condition between the measured and desired time difference Δt4≤ ∆ T4Tr. If the condition is not met, then in block 36 are used for correction of conditions that simulate the spare communications for the simulated communication network, if Yes, then control is transferred to blocks 4, 5.

If the repair means of communication is required, control is passed from block 24 block 25 and 26. In block 25 is made to repair a means of connection to the real network communication unit 26 to simulate the repair of means of communication on the simulated communication network. In block 27 is measured BP is me repair communications for real communication network, in block 28 the timing of repair of the means of communication on the simulated communication network. Next, in block 29 is estimated difference between repair time communication, real communication network and the repair time means of communication of the simulated communication network. In block 30 the following condition is checked between the measured and desired time difference Δt3≤ ∆ T3Tr. If the condition is not met, then in block 31 are used for correction of conditions that simulate the repair of means of communication on the simulated communication network, if Yes, then control is transferred to blocks 4, 5.

The process of functioning of the communication network is implemented by the algorithm shown in figure 3.

In block 1 is the input data: the average time of occurrence of the failure (defeat) of each element of the communication network, the average recovery time of each element of the communication network and the laws of their distribution.

In unit 2 is the formalization of the structure of the studied networks. In this scheme appears to be in separate groups. The type of group depends on the inclusion of elements within the group. There are three types of groups (simulation tools and communication systems and automation. Ivanov E.V. SPb.: YOU, 1992, p.14):

- the simplest, consisting of a single element;

- parallel, in which elements overlap;

- complex, to the Torah takes place in parallel-series connection of elements.

All selected types of groups are assigned sequence numbers.

In block 3 is the matrix describing the elements of the communication network, and matrix descriptions of groups of elements.

For the structure of the communication network shown on figure 4, the matrix description of the elements will be presented on figure 5.

Example of creating a matrix description of the groups of elements for the structure of the communication network shown on figure 4, presented on Fig.6.

In unit 4, you build the matrix POOF. Example of creating a matrix POOF for the structure of the communication network (figure 4) is shown in Fig.7.

In block 5 is the numbering of the elements of the communication network in ascending order, with the first element is assigned the number 1.

In block 6, the simulated verification of occurrence of failure of the studied element of the communication network. If the failure had not occurred, in block 13 is fixed by the time this element of the communication network, and in block 14 is carried out to a higher number of scanned item 1. Next, control is passed to block 22.

If cancelled, the block 7 is fixed by the time of occurrence of failure and control is passed to block 8. Unit 8 checks whether the failed network element due to any POOF. If not, then in block 15, the simulated recovery process of the failed item and after fixing the time of this element (block 16) control the s is passed to the block 22.

If the failed item is contained in the PUFF, then in block 9 are written non POOF. Next, in block 10 are fixed to the Ann, which include POOF with a failed element of the SS.

Unit 11 checks the existence of other functional POOF in the selected block 10 Ann. If such POOF no, then in block 17 is fixed by the time of the refusal Ann, if there is, then control is transferred to blocks 21 and 12. In block 12 is fixed by the time of operation of the selected Ann. In block 21 is an imitation of the recovery process of the failed network element communication. With unit 17, the control is passed to block 18, where simulates the process of restoration of the restored element of the communication network. In block 19 is fixed starting time of the failed network element communication. In block 20 is fixed to the functioning of the Ann. With blocks 12, 20, 21, the control is passed to block 22, where the time dimension timely customer service. Then the control is passed from block 22 to block 6.

The required values of the difference between the real and simulated time changes in the structure of the communication network, the introduction of a backup means of communication, repair communications equipment, spare communications are based on pre-selected accuracy and reliability evaluation (simulation tools and communication systems and automation. Ivanov E.V. SPb.: YOU, 192, p.14).

The precision of the estimate is the value of

If this should occur requirement:

where- evaluation of the expectation that results of the experiment;

M(x) is the mathematical expectation of the unknown parameter.

The reliability of the estimate is a probability α that is the desired inequality:

Thus, the technical result of the claimed method.

The method of modeling of communication networks, which consists in forming the graph investigated probabilistic network, the entries in the registers of the generators of pseudorandom sequence of values of the probability of the existence of the i-th vertex of the network, record the code number of the planned experiments, the formation of a pseudo-random number sequences, the distribution law of random numbers which corresponds to the sudden failures of vertices of the network, forming the sequence of pseudorandom numbers, the distribution law of random numbers which corresponds to the gradual failure of the vertices of the network, forming the sequence of pseudorandom numbers, the distribution law of random numbers which corresponds to the failure of the branches of the network resulting from external influences resulting in the formation of each and the static experiments graph which may exist or may not be the path from the source graph to each of the connected vertices, characterized in that the measured values of the functioning of the real communication network, simulate the network topology changes, mimic the movement of the elements of communication networks, simulate the process of operation of the simulated communication network, the results of which count time timely customer service of the simulated communication network and conduct measurement time values timely customer service on a functioning network connection, compare the value of real time timely customer service with the required value, if the value of real-time timely customer service does not exceed the requirements, processes simulate the operation of the simulated network and time dimension timely customer service on live network connection, continue, if not, it is checked whether the change in the structure of real networks, if changes are needed, there will be changes to the parameters of the real communication network, such as the timing of changes in the structure of real networks, then calculate the difference between the real and simulated time changes in the communication network, which is compared with the required value if the difference is not deviates from the requirements, then continue with the modeling of communication networks and measurement time timely customer service to the real communication network, if the difference exceeds the requirements, the adjustment of conditions that simulate the changes in the structure of the simulated communication network, if the changes to the structure of real networks are not needed, verifies the necessity of a backup means of communication, if there is such a need, real networks entered a backup means of communication and to measure the time of their introduction, simultaneously simulates the process of introducing a backup means of communication and calculated the time of their introduction on the simulated communication network, calculates the difference between the actual and simulated values of time of the introduction of reserve funds communication, which is compared with the desired value, if the value of this difference exceeds requirements, adjustment of conditions that simulate the introduction of a backup means of communication on the simulated communication network, if necessary, the introduction of a backup means of communication not, then checked the maintenance of the means of communication of a functioning network connection, if repairs need to be performed to repair a means of communication for real communication network and a simulation of this process on the simulated communication network, when this is measured by the time of the repair environments is live TV link on real networks and calculated the time of repair of means of communication on the simulated communication network, calculates the difference between the real and the simulated values for the time of repair of means of communication, this difference is compared with the desired value, if the difference exceeds the desired value, the adjustment of conditions that simulate the repair of means of communication on the simulated communication network, if the need for repair no means of communication, there shall be a supply of necessary spare communications for real communication network and at the same time imitation of this process, the system calculates the difference between the real and the simulated time of delivery of spare communications, which is compared with the desired value, if the difference exceeds the desired value, the adjustment of conditions that simulate the spare communications for the simulated communication network.



 

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4 dwg

FIELD: measuring equipment.

SUBSTANCE: in turns, on each device, included in diagnosed block, feeding voltage amplitude is decreased in steps from nominal value Enom to threshold value Ethri with step ΔEn, while on each step of decreasing of amplitude of feeding voltage of device pseudo-random multi-digit code sets are sent to inputs of diagnosed block, consisting of logical zeroes and ones with even possibility of appearance of logical zero or logical one in each digit, received logic levels are recorded on outputs of diagnosed digital block and compared to standard levels, and when error frequency Fc appears, voltage value Ethri is recorded (functioning threshold) for each device and its functioning area is calculated on basis of feeding voltage ΔEpi. Defective (potentially malfunctioning) device is detected on basis of lowest value in functioning area ΔEpi, which is selected on basis of comparison of functioning areas of all devices, included in diagnosed digital block.

EFFECT: higher precision, higher efficiency.

1 dwg

The invention relates to the repair and maintenance of personal computers, namely, to the diagnosis of the health of hardware and software

The invention relates to the field of test and control digital semiconductor integrated circuits (IC) and can be used in assembling electronic means when the input control values of radiation resistance IP containing memory)

The invention relates to computing

The invention relates to the field of automation and computing, in particular to devices for controlling electrical installation

The invention relates to computer technology, and automation and can be used to build tools for monitoring and diagnosing discrete blocks of electronic equipment

The invention relates to the field of automation and computing, in particular to devices for controlling electrical installation

FIELD: measuring equipment.

SUBSTANCE: in turns, on each device, included in diagnosed block, feeding voltage amplitude is decreased in steps from nominal value Enom to threshold value Ethri with step ΔEn, while on each step of decreasing of amplitude of feeding voltage of device pseudo-random multi-digit code sets are sent to inputs of diagnosed block, consisting of logical zeroes and ones with even possibility of appearance of logical zero or logical one in each digit, received logic levels are recorded on outputs of diagnosed digital block and compared to standard levels, and when error frequency Fc appears, voltage value Ethri is recorded (functioning threshold) for each device and its functioning area is calculated on basis of feeding voltage ΔEpi. Defective (potentially malfunctioning) device is detected on basis of lowest value in functioning area ΔEpi, which is selected on basis of comparison of functioning areas of all devices, included in diagnosed digital block.

EFFECT: higher precision, higher efficiency.

1 dwg

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