EA021381B1 - System of digital operational-technological communication of railway transport - Google Patents

Abstract

The invention relates to digital communication technology and can be used in railway transport for organization of operative-technological communication between railway workers in charge of forming train movement. The technical result is aimed at optimization of channel resources of primary networks of operative-technological communication by forming a lower level ring, the functions of a bypass direction of which are executed by a part of an upper level ring. A system includes a double-level ring network architecture based on the lower and upper level rings. The main direction of the upper level ring includes a control station with control boards. At each section of the operative-technological communication in points of the lower level ring there are provided a bridge station and executive stations with control boards. The executive stations and the bridge station are connected in series to the main direction of the lower level ring, for forming a bypass direction of which the stations provided in extreme ring points, are connected to the network with packet switching via corresponding gateways. The bridge stations are connected in series to the main direction of the upper level ring and for forming a bypass direction of the upper level ring its main direction is connected to the network with packet switching via other corresponding gateways.

Description

The invention relates to a technique of telecommunications digital communication and can be used on railway transport for the organization of operational and technological communication of workers organizing the movement of trains. The technical result consists in optimizing the channel resources of the primary networks of operational and technological communication due to the formation of a lower-level ring, the bypassing function of which is performed by part of the upper-level ring. The system includes a two-level ring network architecture based on rings of the lower and upper levels. An administrative station with control panels is included in the main direction of the top-level ring. At each site of operational and technological communication, a bridge station and executive stations with control panels are installed in the points of the lower level ring. Executive and bridge stations are sequentially included in the main direction of the lower-level ring, in order to form the bypass direction of which the stations installed in the outermost points of the ring are connected to the packet-switched network through appropriate gateways. In the main direction of the upper level ring, bridge stations are connected in series, and to form a bypass direction of the upper level ring, its main direction is connected to a packet-switched network through other gateways.

The invention relates to telecommunications engineering, mainly to digital communication and can be used on railway transport for the organization of operational and technological communication of workers organizing the movement of trains.

A known system for constructing a multi-ring hierarchical network on fiber-optic communication lines, implements a known method of constructing a multi-ring hierarchical network on fiber-optic communication lines, containing a central communication center with a central station and switching stations connected to lower-level rings of the hierarchy, covering various spatial areas introduced by switching stations intended to transmit information between rings of different levels of the hierarchy, with the central station and the mutating stations interconnected to the upper level hierarchy ring (CI 2,127,489, N04V 10/12, 14/00 N041, 1998 YG).

The known system ensures the reliability of radio communications by organizing negotiations on bypass branches of the rings when the main branches of the rings break. However, in the normal mode, if there is no accident in the main part of the ring of the lower level of the hierarchy, its bypass part is not used and cannot be provided for the organization of other links.

A device for a ring network of operational-technological communication via fiber-optic transmission systems in railway transport is known. It contains a switchboard of operational-technological communication connected to the dispatcher’s operational radio control panel at an administrative station and a switch of operational-technological communication to each executive station. which is connected to a fixed radio station, mobile radio stations, and the switches of operational and technological communication of executive stations Dineny in the lower hierarchy of the ring, covering the circles of the dispatching radio communication, the switches of operational and technological communication at the main executive stations are configured as bridge and are used to transfer information between the rings of the lower and upper levels of the hierarchy, the switch of the operational technological connection of the administrative station and bridge switches are interconnected in ring of the top level of the hierarchy, and each primary digital channel of the ring of the lower and upper levels of the hierarchy contains a B-channel for the transmission of conversational signals and the канал-channel for transmitting control signals and the corresponding equipment providing two-way communication between operational dispatch and / or management personnel of the road and train drivers and transmitting signals from control commands of operational dispatch personnel (CI 2289208, Н04В 10/12 , HBB 7/26, 10.12.2006).

In the known technical solution, each direction of the railway is built on the basis of the lower level rings, covering sections of the railway, and the upper level rings that unite the lower level rings using bridge stations and connecting them with the administrative station of the corresponding direction.

The upper level ring is used to relay information between the lower level rings and the administrative station within the direction of the railway. In the equipment of bridge and control stations, a semi-permanent connection of channel intervals of the lower and upper levels is carried out in accordance with the scheme of dispatch connections of each direction.

The digital operative-technological communication system is based on the use of fiber-optic communication lines and digital transmission systems.

The construction of dispatch communications is based on the use of fixed basic digital channels (BCC), which unite subscribers of the administrative and executive stations of the dispatch section.

In order to ensure the reliability of work, dispatch communications are built according to a ring principle with the use of spatial rings, the main and bypass directions of which are organized in different fiber-optical transmission systems.

The ring structure for the organization of the primary network of operational and technological communications ensures the reliability of operational and technological communications, as well as the functioning of the system with automatic switching on of a part of the bypassing ring if the part of the main direction ring is broken. However, parts of the rings of the lower and upper levels of the bypass direction during normal operation of the network (in the absence of accidents) are not used.

The problem solved by the invention is to create a technical solution that provides the possibility of building operational and technological communications on rail transport using a smaller channel capacity of the primary network without degrading the main indicators of operational-technological communication systems (OTS).

The technical result consists in optimizing the channel resources of the primary networks of operational and technological communication due to the formation of a lower-level ring, the bypassing function of which is performed by part of the upper-level ring.

The technical result of the invention is achieved by the fact that the system of digital operative-technological communication of railway transport includes a two-level ring network architecture based on lower and upper level rings; a control station with control panels is included in the main direction of the upper level ring;

- 1 021381 communication in the points of the lower level ring, a bridge station and executive stations with control panels are installed, the executive and bridge stations are sequentially included in the main direction of the lower level ring, to form a bypass direction of which the stations installed in the outermost points of the ring are connected to the packet-switched network, with the bridge stations of the lower level rings being sequentially included in the main direction of the upper-level ring, to form the trunk direction whose main direction is connected to a packet-switched network through other appropriate gateways.

The invention is illustrated in the drawing, which shows a structural diagram of one of the embodiments of the digital system of operational and technological communication.

The system of digital operational and technological communications includes a two-level ring network architecture based on lower and upper levels rings.

The main station of the top level ring 1 includes a management station 2 with control panels 3 and 4 of the train dispatchers control center, installed in the single control center.

At each site of operational and technological communication, a bridge station 5 is installed with consoles 6 and 7 of the infrastructure dispatcher and the station attendant, respectively, and in the second station is the executive station 8 with the consoles 9 of the station attendant’s control, in the third station the executive station 10 with consoles 11 control station on duty, and the bridge and executive stations 5, 8 and 10 are connected in series in the main direction of the ring 12 of the lower level, for the formation of the bypass direction of which the bridge station I 5 and Executive station 10 through the corresponding gateways 13 and 14 are connected to the network 15 with packet-switched.

To form a bypass direction of the upper level ring 1, the packet switching network 15 through other gateways 16 and 17 is connected to the main direction of the upper level ring 1 with bridge stations 5 included in all operational-technological communication sections.

Rings 12 of the lower level cover sections of the railway in one direction. Top level rings 1 combine bottom level rings 12.

Ring 1 of the upper level is used to relay information between the rings 12 of the lower level and administrative station 2 within the railway section.

Ring 1 of the upper level provides the organization of dispatch circles, whose subscribers are located in several areas and pulling the dispatch circles to the equipment of the administrative station 2 of the control center of control. In the equipment of bridge and administrative 5 and 2 stations, semi-permanent connection of the time intervals of the rings 1 and 12 of the lower and upper levels is made in accordance with the scheme of dispatch connections of each direction.

Each ring 12 of the lower level is formed on the basis of a beam of primary digital channels (CSC) with an E1 information flow of 2048 kbit / s each. The number of CCP in the beam depends on the total information flow in the ring of the lower level.

The top level ring 1 is formed on the basis of a beam of primary digital channels. The number of PCCs in the beam depends on the total information flow in the relay channels.

Each CTC channel contains 32 BCC channels.

The ring structure of the organization of the primary network of operational and technological communication is adopted to improve reliability and ensures the functioning of the system with automatic activation of the bypass direction in case of violation of the main direction.

The OTS digital network provides the transmission of information of the following types: the speech of operational-technological communication subscribers (OTS); messages, the speech of subscribers of general technological communication (OBTS).

The speech of subscribers of operational and technological communication in the OTS network is transmitted in B-channels of the CCP.

To transmit the speech of OTS subscribers of one dispatch circle, the group channel is used with the BCC with the technical capability for each subscriber of the free listening channel and voice input into it.

To control the transmission of speech in a group channel, signaling messages are used that are transmitted in the Ό-channel of the control center's TSC network.

Switching the group channel for each control room is performed on the principles of a semi-permanent connection created during the installation of the system. In this case, the distribution of group channels (equal to the number of dispatcher circles) is carried out along the B-channels of the CCP with assignment of corresponding numbers to them.

Within the same ring 1 or 12 (upper or lower level) for the group channel in all links of the CCP, B-channels with the same number are used. The numbers of B-channels allocated for organizing the same group channel in different rings may not coincide.

Transmission of messages in the OTN network is carried out in the common signaling channel (ACS) organized in the Ό-channel of rings 1 and 12 of the upper and lower levels of the central control center. The technical data transfer rate in the ACS is 64 kbps. ACS is designed to transmit signaling messages to control the transmission of speech in the group channels of OTN subscribers, as well as service messages to provide technical personnel access to the OTN network, remote control and management of the resource itself.

The speech transmission of the OTTS subscribers in the OTS network is carried out via the dedicated B-channels of the upper and lower levels of the CCP ring from among those not used for group channels of OTS subscribers.

In the executive stations 8 and 10, the subscriber’s voice path is connected to the B-channel of the group channel in the OTS network using adders. The subscriber's speech is entered into the B channel of the CEC link and is transmitted in two directions, bringing the ring to all stations.

In each ring 1 and 12 CCP, a logical break point is used to prevent speech circulation in B-channels. This point is set at the main station.

The point of logical discontinuity at the main station of the ring always exists, provided that all elements of the ring are in good condition. In order to monitor the operability and integrity of the ring, the main station periodically transmits a control message on the ring via the OKS of the ring. The fact that this message was returned (along the ring) to the main station for a certain time from the moment it was sent to the channel is treated as a normal ring operation, and the fact of non-return is interpreted as a violation of its integrity and the appearance of a physical break in the ring.

In the case of returning the message Control Ring, the point of logical discontinuity of the B-channels at the main station of the ring is eliminated and allowed the unimpeded transmission of voice information. In this case, the transmission of the service message “Ring control” to the ACS of the CCP ring is continued, and if this message is returned to the main station of the ring, the logical discontinuity point is again restored in it.

Messages entered by stations in the Ό-channel of the ring 1 and 12 CCP of the upper or lower level are transmitted simultaneously in two directions - along both arcs of the ring, with the obligatory reporting of messages to all stations of the ring.

To prevent the circulation of messages in the ring, a procedure for clearing messages is applied. The message Control Ring is extinguished in the main station of the ring, having made a full turn in all stations of the ring.

A bypass direction for stations 5, 8 and 10 of the ring 12 of the lower level will be a network 15 with packet-switched. The point of logical discontinuity in the B-channels of the lower level ring 12 is organized at bridge stations 5. Gateways 13 and 14 convert the E1 stream into packets (and vice versa), which are transmitted over the packet-switched network 15.

The integrity of the ring 12 is monitored by sending an appropriate overhead message on the Ό-channel circulating in both directions via the network 8ΌΗ through stations 5, 8 and 9 and through gateways 13 and 14 via the network 15 with packet switching. If the integrity of the ring 12 is violated, which is detected by the lack of reception of the service message of the ring control, the logical gap in the B-channels is removed. In this case, the signals to the B-channels of stations 8 and 10 come both through the line between the bridge stations of 5 sections (to the point of damage) and through the packet-switched network 15. When the damage is corrected and the reception of the service message control ring 12 is resumed, the logical gap in the B-channels is restored.

Similarly, the network 15 with packet switching is organized bypassing the direction of the ring 1 of the upper level.

When used to organize a detour direction of the rings 1 and 12 of the network 15 with packet switching, take appropriate measures to ensure the specified time of message delivery, control signaling.

In this case, the vacated part of the channel capacity of the primary network (BCC channels) can be used to organize general technological telephone communication, data transmission and other information.

Thus, the proposed digital system of operational-technological communication provides the possibility of building operational-technological communication in railway transport using a smaller channel capacity of the primary network without degrading the main indicators of operational-technological communication systems.

Claims (1)

CLAIM The system of digital operational and technological communications of railway transport, including a two-tier ring network architecture based on lower and upper levels rings, a control station with control panels is included in the main direction of the upper level ring; a bridge station is installed at each section of operational technological communication and executive stations with control panels, the executive and bridge stations sequentially included in the main direction of the ring n The upper level, for forming the bypass direction of which the stations installed in the outermost points of the ring, are connected to the packet-switched network through the corresponding gateways, the bridge stations of the lower level rings are consistently included in the main direction of the upper level ring, while forming the circumferential direction of the upper level ring the main direction is connected to a packet-switched network through other appropriate gateways. - 3 021381