RU2736096C1 - Hardware and software system for simulating telecommunication technologies - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: invention relates to electrical communication. Technical result is achieved due to that in each of N terminals for generating telecommunication signals, PDH time multiplexing equipment is introduced, which provides generation of linear signal E3 with transfer rate of 34.368 Mbit/s, and a multifunctional program-controlled CWDM-system, which provides formation of up to eight CWDM-channels with throughput capacity of 10 Gbit/s each.

EFFECT: technical result consists in improvement of carrying capacity of hardware and software complex of modelling of telecommunication technologies.

1 cl, 1 dwg

Description

The invention relates to the field of telecommunications and can be used in educational institutions as laboratory equipment for the study of telecommunication networks and their components, as well as when organizing communications in special-purpose communication networks.

A known method of building an integrated digital system of technological communication of railway transport (see the application of the Russian Federation for invention No. 2009138784, M. class H04B 10/00, publ. 27.04.2011).

This system provides the organization in a single hardware and software complex of subsystems of the digital transmission system of the synchronous hierarchy STM-1 (4), operational and technological communication, general technological communication, audio broadcasting communication, data transmission for operational and technological purposes and means of security and fire alarms, transmission network packet-switched data, separate monitoring and administration systems, and network clock synchronization for each type of communication. At the same time, the system has a common high-performance control device, a common synchronization device and a common monitoring and administration device based on a single design base.

This complex is a closed local system and does not allow interaction with any external equipment, i.e. cannot be used as a hybrid information transmission system. In addition, the capacity of this system is limited by the level of the synchronous digital hierarchy (STM-4 system) and amounts to 622 Mbps. At the same time, only fiber-optic lines are used to connect the complex subsystems.

Also known is a system of digital operational and technological communication in railway transport (see RF patent for a useful model No. 72591, M. class H04J 3/08, H04B 3/52, publ. 20.04.2008), built on the basis of a local ring structures using typical channel-forming equipment SDH and PDH levels, i.e. equipment for generating a synchronous transport information signal STM-1 of the digital hierarchy for converting a low-speed signal into a high-speed one (SDH) and generating a user and service information (PDH) transmission signal. The system for interfacing at least two communication sections contains, in one section, an executive and at least one executive switching station, and in the other section, at least one executive switching station, having an individual multiplexer-demultiplexer at the input and output connected to each other in each section by a primary digital channel of the said ring structure, converting the primary digital channel into basic digital channels, in one of which, used as a common signaling channel, a controller connected to the control device is connected in series, and the main digital channels, intended for transmission of speech signals are connected through a digital adder with a switching device and a multiplexer-demultiplexer, which converts the main digital channels into a primary digital channel. In this case, in the system, a processor with a control device, a transit switch, an additional digital adder and an additional controller are connected to the executive switching stations of each interface section, the output of which is connected by a common signaling channel to the multiplexer-demultiplexer connected to the primary digital channel of the interface section, and the control input of the additional controller is connected to a processor connected to a control device and a transit switch connected to the paths of the speech channels in series with digital adders, while the executive switching stations of the interfaces are connected by at least one primary digital channel.

This system is also a local closed system that uses only typical digital PDH signals and does not use other signals to transmit, i.e. there is also no external interaction and no use of primary interfaces, and control is performed in the volume of one railway station.

Known hardware and software complex for modeling infocommunication technologies (RF Patent No. 112803 cl. Н04М 11/00, publ. 20.01.2012), synthesized on the basis of a ring network structure, which contains N terminals for generating signals of telecommunications, where N is selected depending on class of the network used, each of which has a multifunctional software-controlled channel-forming equipment (KOA) of SDH and PDH levels, the latter being connected to secondary digital telephone and secondary analog networks, having a network control system and a software-controlled digital signal switch in each of N terminals for the formation of telecommunication signals, forming on the corresponding bus signals of the subscriber interface and connected with the multifunctional software-controlled KOA SDH and PDH levels and using the subscriber interface with secondary digital telephone and analog telegraph networks, and the ring network structure is formed by the connection between th multifunctional software-controlled SDH KOA level of each terminal.

The specified hardware and software complex (AIC) allows interaction with external equipment, both fiber-optic and metal cables are used to transfer information, but the bandwidth is limited by the level of the synchronous digital hierarchy (STM-64 system) and is 10 Gbit / s. This technical solution was chosen as a prototype.

The aim of the present invention is to expand the functionality of the hardware-software complex for modeling telecommunication technologies.

Achievement of this technical result is provided in the proposed agro-industrial complex for modeling telecommunication technologies, synthesized on the basis of a ring network structure, which contains a network control system and N terminals for generating signals of telecommunications, where N is selected depending on the class of the network used, each of which has a software-controlled switch digital signals, multifunctional SDH-level KOA, software-controlled PDH-level KOA, the latter being connected to secondary digital telephone and secondary analog networks, while in each of the N terminals for the formation of telecommunication signals PDH time grouping equipment is introduced, which provides the formation of the E3 line signal at a speed transmission 34.368 Mbit / s, and a multifunctional software-controlled CWDM-system, providing the formation of up to eight CWDM-channels with a bandwidth of 10 Gbit / s each, while telecommunication equipment is multifunctional On the local software-controlled SDH KOA and multifunctional software-controlled CWDM-system of each of the terminals for generating signals of telecommunications, transport networks of the agro-industrial complex F, G, H are formed, and the maximum network throughput up to 80 Gbit / s is achieved using the multifunctional software-controlled CWDM system, moreover, the equipment allows you to organize up to 8 duplex CWDM channels - it generates a transport signal at a speed of up to 80 Gbit / s and allows you to carry out 3R signal regeneration, conversion into spectral channels and their combination into a CWDM group signal using a built-in optical multiplexer, while realizing a radial network structure, multifunctional software-controlled CWDM-system provides independent operation over optical communication lines.

Introduction of the proposed hardware and software complex for modeling telecommunication technologies into the terminals for generating signals of telecommunication technologies of temporary grouping PDH equipment, providing the formation of a linear signal E3 with a transmission rate of 34.368 Mbit / s, and a multifunctional software-controlled CWDM-system, providing the formation of up to eight CWDM-channels with a bandwidth with a capacity of 10 Gbit / s each, it made it possible to conduct classes on the indicated types of communication means, and also made it possible to transfer information at a maximum speed of 80 Gbit / s (8 channels of 10 Gbit / s), i.e. to expand the functionality of the hardware-software complex for modeling telecommunication technologies for teaching students the communication means of this type and increased the throughput.

The proposed hardware and software complex for modeling telecommunication technologies is illustrated by a drawing, which shows its structural diagram. The complex contains a ring network structure in which there are N terminals for generating signals of telecommunications from 1 ₁ to 1 _N , where N is selected depending on the class of the network used. For example, for the proposed AIC model, the network class C and N can be selected in the range from 1 to 254.

Each of the terminals for generating signals of telecommunications (1 ₁ -1 _N ) contains: multifunctional software-controlled PDH KOA level 1, software-controlled switch of digital signals 2, time conversion equipment PDH 3, multifunctional software-controlled KOA SDH level 4 and multifunctional software- controlled CWDM system 5.

In addition, the proposed complex contains a network control system associated with all elements of each terminal for generating signals of telecommunications 1 ₁ -1 _N.

At the same time, in each of the N terminals for generating signals of telecommunications, the multifunctional software-controlled PDH PDH of level 1 with input / output buses is connected with a software-controlled switch of digital signals 2, PDH 3 time conversion equipment and a multifunctional software-controlled SDH of the 4 level. controllable KOA PDH level 1 of any two terminals for generating signals of telecommunication from the total number included in the complex (1 ₁ -1 _N ), can communicate with each other via a metal or optical cable, forming a radial structure A or B, respectively. In addition, any multifunctional software-controlled KOA PDH level 1 of any terminal for generating telecommunication signals from the total number included in the complex (1 ₁ -1 _N ) can transmit information in 8 different directions to the multifunctional software-controlled KOA PDH level 1 of any terminals generating telecommunication signals from the total number included in the complex (1 ₁ -1 _N ), via a metal cable, forming a radial structure C. Subscriber interfaces of the multifunctional software-controlled PDH PDH COA can be connected directly to terminal devices or output to various switching devices.

The software-controlled switch of digital signals with 2 input / output buses is connected with the multifunctional software-controlled KOA PDH level 1, the time conversion equipment PDH 3 and the multifunctional software-controlled KOA SDH level 4. The software-controlled switch of digital signals 2 can communicate with the multifunctional software- controlled by KOA PDH level 1 and a software-controlled switch of digital signals 2 any terminals for generating telecommunication signals from the total number of the complex (1 ₁ -1 _N ), via a metal cable, realizing a network with a "linear circuit" topology D. Subscriber interfaces software -controlled switch of digital signals 2 can be connected directly to terminal devices or output to various switching devices.

PDH time conversion equipment with 3 input / output buses is connected to a multifunctional software-controlled PDH PDH level 1, a software-controlled digital signal switch 2 and a SDH multi-functional software-controlled SDH level 4. Time conversion equipment PDH 3 of any two terminals for generating telecommunication signals from a common numbers included in the complex (1 ₁ -1 _N ) can communicate with each other via an optical cable, forming a radial structure D. Subscriber interfaces of the PDH 3 time conversion equipment can be connected directly to terminal devices or output to various switching devices.

Multifunctional software-controlled KOA SDH level 4 input / output buses connected with multifunctional software-controlled KOA PDH level 1, software-controlled switch of digital signals 2, time conversion equipment PDH 3 and multifunctional software-controlled CWDM-system 5. Multifunctional software-controlled KOA SDH level 4 of any two terminals for generating signals of telecommunications from the total number included in the complex (1 ₁ -1 _N ) can communicate with each other via an optical cable, forming a radial structure F, in addition, a multifunctional software-controlled KOA SDH level 4 of all terminals for the formation of telecommunication signals included in the complex (1 ₁ -1 _N ) can be interconnected, forming a ring network structure G. Subscriber interfaces of the multifunctional software-controlled SDH SDH COA can be connected directly to the terminal devices or output to various switching devices ...

Multifunctional software-controlled CWDM-system with 5 input / output buses connected to the multifunctional software-controlled SDH level 4. Multifunctional software-controlled CWDM-system 5 of any two terminals for generating telecommunication signals from the total number of the complex (1 ₁ -1 _N ), can communicate with each other via an optical cable, forming a radial structure H. Subscriber interfaces of the multifunctional software-controlled SDH level 4 KOA can be connected directly to terminal devices or output to various switching devices.

The claimed complex is illustrated by the drawing of FIG. 1, which illustrates the block diagram of the APC modeling telecommunication technologies.

It is convenient to consider the operation of the claimed complex using the example of the structural diagram of the agro-industrial complex for modeling telecommunication technologies (Fig. 1).

The hardware and software complex works as follows.

Telecommunication equipment of the multifunctional software-controlled SDH KOA level 4 and the multifunctional software-controlled CWDM-system 5 of each of the terminals for generating signals of telecommunication form the transport networks of the agro-industrial complex F, G and H (the specific type of transport network is determined by the communication option).

The maximum network bandwidth (up to 80 Gbps) is achieved using a multifunctional software-controlled CWDM system 5, which provides:

subscriber interfaces STM-1/4/16, GE, OTU1;

up to eight CWDM channels: 2x10G + 6x2.5G; 4x10G; 8x10G;

optical control channel.

The equipment allows organizing up to 8 duplex CWDM channels - it generates a transport signal at a speed of up to 80 Gbit / s. The equipment performs 3R signal regeneration, conversion into spectral channels and their combination into a CWDM baseband signal using a built-in optical multiplexer.

Realizing the radial network structure H, the multifunctional software-controlled CWDM-system 5 provides independent operation over optical communication lines.

To the subscriber input of the multifunctional software-controlled CWDM-system 5, a linear interface of the multifunctional software-controlled KOA SDH level 4 is connected, which provides:

formation of a linear signal STM-1/4/16 (up to 2.5 Gbit / s);

multiplexing / demultiplexing and placement of E1 tributaries in TUG-3s of the VC-4;

subscriber interfaces E1, Ethernet 10/100, Ethernet 1000, STM-1/4;

synchronization of the system from various sources or an internal generator by default;

the built-in computer of the control unit ensures the operation of the control system;

organization of service communications.

Realizing a radial network structure F and a ring network structure G, the multifunctional software-controlled SDH level 4 KOA provides independent operation over optical communication lines.

The subscriber inputs / outputs of the multifunctional software-controlled KOA SDH level 4 can be connected to the linear outputs of the multifunctional software-controlled KOA PDH level 1, time conversion equipment PDH 3 and the inputs / outputs of the software-controlled switch of digital signals 2.

Telecommunication equipment of the multifunctional software-controlled KOA PDH level 1 is intended for:

work with E1 signals when connecting external equipment;

work with linear signals when connecting linear paths and if there are linear interface blocks in the configuration;

work with signals of subscriber interfaces when connecting subscriber lines and if there are subscriber interface blocks in the configuration.

KOA PDH provides:

direct and inverse conversion of a signal in the HDB-3 code into an information signal in the NRZ format;

selection of the reception clock;

formation of control and clock signals for AI blocks. The phases of the control signals are synchronized with the phase of the information signal using a synchronization device;

formation from digital channels (64 kbit / s) of primary group signals with a transmission rate of 2.048 Mbit / s with a frame structure in accordance with ITU-T Recommendations G.704, G.706, including the implementation of the CRC-4 procedure (primary E1 group signal);

recording in the zero time slot of the transmitted information signal of code words of frame and superframe synchronization, notification signals, alarms and other service signals;

combining signals over channel signaling in 16 timeslot of the primary baseband signal E1;

error selection signal to calculate K _err.

Implementing radial network structures A and B, the multifunctional software-controlled PDH PDH level 1 provides independent operation over optical and (or) metal communication lines, respectively, and realizing the radial network structure C - only through a metal communication line.

PDH 3 time conversion equipment provides:

formation of a linear signal E3;

subscriber interfaces E1 and Ethernet 10/100;

cross-connection of E1 signals to E3;

cross-connection at the level of 64 kbit / s timeslots in E1.

Realizing the radial network structure E, the PDH 3 time conversion equipment provides independent operation over optical communication lines.

The software-controlled switch of digital signals 2 provides switching of timeslots of signals E1 128 directions, as well as:

reception / transmission of E1 signals up to 128 directions;

switching of time slots of E1 signals of 128 directions;

synchronization modes: "ЗГ", "ВТЧ", "ВТЧ reserve", "Ext. sync. " and outputting a 2048 kHz clock signal for synchronizing other equipment;

redundancy of E1 signals;

transmission of equipment status signals to an external control system;

control over the state and control of the equipment operation modes from the terminal of the network control system of telecommunication equipment.

Realizing a network with a "linear circuit" topology D, the software-controlled digital signal switch 2 provides independent operation over metal communication lines.

The outputs of the digital switch are connected:

telecommunication equipment of multifunctional software-controlled KOA PDH level 1;

PDH time conversion equipment 3.

The operation of the agro-industrial complex equipment is controlled using a network control system.

The network control system consists of a computer with a graphical user interface, network elements (each of which is one set of equipment, one receiving / transmitting system), interconnected by transmission lines via Ethernet interfaces or DCC channels, and software for a networked telecommunication equipment control system NMS.

The network control system for telecommunication equipment provides:

- NMS admission control;

- configuration management;

- administration;

- troubleshooting management;

- control of technical characteristics.

The possibility of realizing and obtaining a positive effect when implementing the claimed method was also tested by creating a hardware-software complex for modeling telecommunication technologies and conducting a full-scale experiment. In the course of the experiment, various combinations of schemes for switching on the AIC equipment were used.

The results of the experiment showed a significant expansion of the functionality of the agro-industrial complex with the declared prototype, which also indicates the possibility of achieving the planned result using the proposed technical solution.

Claims (1)

A hardware-software complex for modeling telecommunication technologies, consisting of a ring network structure that contains a network control system and N terminals for generating telecommunication signals, where N is selected depending on the class of the network used, each of which has a software-controlled digital signal switch, multifunctional KOA SDH level, software-controlled PDH-level KOA, the latter being connected to secondary digital telephone and secondary analog networks, characterized in that each of the N terminals for the formation of telecommunication signals is equipped with PDH time grouping equipment, which provides the formation of the E3 line signal with a transmission rate of 34.368 Mbit / s, and a multifunctional software-controlled CWDM-system, providing the formation of up to eight CWDM-channels with a bandwidth of 10 Gbps each, while telecommunication equipment is a multifunctional software-controlled SDH KOA and many of the gofunctional software-controlled CWDM-system of each of the terminals for generating signals of telecommunications, transport networks of the agro-industrial complex F, G, H are formed, and the maximum network throughput of up to 80 Gbit / s is achieved using a multifunctional software-controlled CWDM system, and the equipment allows you to organize up to 8 duplex CWDM channels - generates a transport signal at a speed of up to 80 Gbps and allows 3R signal regeneration, conversion into spectral channels and their combination into a CWDM baseband signal using a built-in optical multiplexer, while realizing a radial network structure, multifunctional software-controlled The CWDM system provides independent operation over optical communication lines.

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