RU2483453C1 - System of digital operative-technological communication of railway transport - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: system comprises a double-level circular network architecture on the basis of rings of lower and upper levels, in the main direction of the upper level ring there is a control station with control panels, on each section of operative-technological communication in one of points of the lower level ring there is a bridge station with control panels, and in other points - executive stations with control panels, the executive and bridge stations are switched in series into the main direction of the lower level ring, bridge stations of each section of the operative-technological communication are connected into the main direction of the upper level ring, for generation of the bypass direction of which the stations installed at the ends of its main direction via the appropriate gateways are connected to the grid with packet switching.

EFFECT: optimisation of channel resources of primary networks of operative-technological communication due to formation of a lower level ring, functions of bypass direction of which are performed by a part of an upper level ring.

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Description

The invention relates to telecommunication technology, mainly to digital communication, and may find application in railway transport for organizing operational-technological communication of workers organizing train traffic.

A known system for constructing a multi-ring hierarchical network on fiber-optic communication lines that implements a known method for constructing a multi-ring hierarchical network on fiber-optic communication lines, comprising a central communication node with a central station and switching stations connected in rings of the lower level of the hierarchy, covering various spatial areas, introduced switching stations designed to transmit information between rings of different levels of the hierarchy, with the central station and mutating ones are interconnected in a ring of the upper level of the hierarchy (RU 2127489, Н04В 10/12, H04J 14/00, 1998).

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, in the absence of an 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 other communications.

A device is known for a ring network for operational-technological communication via fiber-optic transmission systems in railway transport, comprising an operational-technological communication switch at a control station, to which a control room for an operational radio communication controller is connected, and at each executive station, an operational-technological communication switch, to which a stationary radio station, mobile radio stations are connected, and the switches of operational technological communication of the executive stations are are divided into rings of the lower level of the hierarchy, covering the circles of dispatch radio communications, the switches of operational-technological communication at the main executive stations are configured as bridges and are designed to transmit information between the rings of the lower and upper levels of the hierarchy, the switch of operational-technological communication of the control station and bridge switches are connected between into the ring of the upper 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 s for the transmission of conversational signals and the D-channel for transmitting control signals and the corresponding equipment, providing two-way exchange of messages between the operational dispatching and / or executive personnel of the road and train drivers and the transmission of signals from the control teams of the operational dispatching personnel (RU 2289208, Н04В 10 / 12, H04B 7/26, 12/10/2006).

In the known technical solution, each direction of the railway is built on the basis of rings of the lower level, covering sections of the railway, and rings of the upper level, combining the rings of the lower level with the help of bridge stations and connecting them to the control 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 regulatory stations, a semi-permanent connection of the channel intervals of the rings of the lower and upper levels is made in accordance with the scheme of dispatcher communications in each direction.

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

To build dispatcher communications, they use fixed main digital channels (BCC), which unite subscribers of the administrative and executive stations of the dispatch area.

In order to ensure reliable operation, dispatch communications are built on a ring principle using spatial rings, the main and bypass directions of which are organized in different fiber-optic transmission systems.

The ring structure for the organization of the primary network of operational-technological communication ensures the reliability of operational-technological communication, as well as the functioning of the system with the automatic inclusion of part of the ring bypass direction in violation of part of the ring of the main direction. However, parts of the rings of the lower and upper levels of the bypass direction during normal network operation (in the absence of accidents) are not used.

The problem solved by the invention is to create a technical solution that provides the ability to build operational-technological communications in railway transport using a smaller channel capacity of the primary network without compromising the main indicators of operational-technological communications (OTC) systems.

The technical result consists in optimizing the channel resources of the primary networks of the operational-technological communication due to the formation of the lower level ring, the bypass direction 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 operational and technological communication of railway transport includes a two-level ring network architecture based on the rings of the lower and upper levels, an administrative station with control panels is included in the main direction of the upper level ring, in each section of the operational and technological communication in one from the points of the lower level ring, a bridge station with control panels is installed, and in other points - executive stations with control panels The executive, bridge and bridge stations are connected in series in the main direction of the lower level ring, while the bridge stations of each section of the operational-technological communication are included in the main direction of the upper level ring, for the formation of the bypass direction of which the stations installed at the ends of its main direction through the corresponding gateways connected to a packet-switched network.

The invention is illustrated by the drawing of figure 1, which shows a structural diagram of one of the embodiments of the digital operational technological communication system.

The digital process communication system includes a two-level ring network architecture based on the rings of the lower and upper levels.

The main direction of the upper level ring 1 includes an administrative station 2 with control panels 3 and 4 of the first and second train dispatchers of the DSC, installed in a single control center.

A bridge station 5 with control panels 6 and 7, respectively, of an infrastructure dispatcher and a station duty officer was installed at each section of the operational-technological communication at one of the points, and an executive station 8 with control panels 9 of the station duty officer was installed at the second point, and the executive point was at the third point station 10 with the control panels 11 of the station attendant, moreover, the bridge and executive stations 5, 8 and 10 are connected in series in the ring 12 of the lower level.

The bridge stations 5 of each section of the operational-technological communication are included in the main direction of the upper level ring 1, to form a roundabout direction of which stations 2 and 5, installed at the ends of its main direction, are connected to the packet-switched network 15 through the corresponding gateways 13 and 14.

The lower level rings 12 cover sections of the railway of one direction. The upper level rings 1 combine the lower level rings 12.

The upper level ring 1 is used to relay information between the lower level rings 12 and the control 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 dispatch circles to the equipment of the administrative station 2 of the dispatch control center. In the equipment of bridge and administrative 5 and 2 stations, a semi-permanent connection of the channel intervals of the rings 1 and 12 of the lower and upper levels is made in accordance with the scheme of dispatcher communications in each direction.

Each ring 12 of the lower level is formed on the basis of a “beam” of primary digital channels (PCC) with an E1 information flow of 2048 Kbps in each. The amount of PCC in the “bundle” depends on the total information flow in the ring of the lower level. Each CCC channel contains 32 bcc channels.

Ring 1 of the upper level is formed on the basis of the "beam" of primary digital channels. The number of PCCs in the “bundle” depends on the total information flow in the relay channels.

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

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

The speech of the subscribers of the operational-technological communication in the OTC network is transmitted in the B channels of the PCC.

To transmit the voice of the OTS subscribers of one dispatch circle, the BCC group channel is used with the technical ability for each subscriber of the circle to freely listen to the channel and enter speech into it.

To control the transmission of speech in a group channel, signaling messages transmitted in the D-channel of the PCC of the OTC network are used.

The switching of the group channel for each dispatch circle is carried out on the principles of a semi-permanent connection created during the installation of the system. At the same time, group channels are distributed (equal to the number of dispatcher circles) along the B-channels of the PCC with the assignment of the corresponding numbers to them.

Within one ring 1 or 12 (upper or lower level) for the group channel in all links of the PCC use B-channels with the same number. The numbers of B-channels allocated for the organization of the same group channel in different rings may not coincide.

Messages are transmitted in the OTC network in the common signaling channel (CCS), organized in the D-channel of rings 1 and 12 of the upper and lower level PCC. The technical speed of information transfer to the ACS is 64 kbit / s. The ACS is designed to transmit signaling messages for controlling voice transmission in the group channels of OTS subscribers, as well as service messages to provide access for technical personnel to the OTS network, remote monitoring and system resource management.

Voice transmission of OBTS subscribers in the OTC network is carried out through dedicated B-channels of the upper and lower level PCC rings from among those not used for group channels of OTC subscribers.

In executive stations 8 and 10, the subscriber's speech path is connected to the group channel B channel in the OTC network using adders. The subscriber's speech is introduced into the B-channel of the PCC link and is transmitted in two directions with communication to all ring stations.

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

A logical break point at the main station of the ring always exists provided that all elements of the ring are in good condition. To control the operability and integrity of the ring, the main station periodically transmits the Ring Control service message over the ACS ring. The fact of the return of this message (in a ring) to the main station within a certain time from the moment of its sending to the channel is interpreted as normal operation of the ring, and the fact of non-return as a violation of its integrity and the occurrence of a physical gap in the ring.

In the case of the return of the “Ring control” message, the logical break point of the B-channels at the main station of the ring is eliminated and the unimpeded transmission of voice information is allowed. At the same time, the transmission of the “Ring Control” service message to the ACS continues the PCC ring, and if this message returns to the main station of the ring, the logical break point is restored again.

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

To prevent the circulation of messages in the ring, the procedure of "blanking" messages is used. The message “Ring control” is extinguished in the main station of the ring, having made a complete revolution at all stations of the ring.

The bypass direction of the upper layer ring 1 is a packet switched network 15. The logical break point in the B-channels of the ring 1 of the upper level is organized at any of the stations 5 or 2, taken as the main one. Gateways 13 and 14 convert the E1 stream to IP packets), which are transmitted over the packet-switched network 15, and vice versa, from IP packets to the E1 stream.

The integrity of the ring 1 is controlled by sending the appropriate service message on the D-channel circulating in both directions over the SDH network through stations 5 and 2 and through gateways 13 and 14 through the packet switched network 15. In case of violation of the integrity of the ring 1, which is detected by the lack of reception of the service message control ring, the logical gap in the B-channels is removed. In this case, the signals in the B-channels of stations 2 or 5 arrive both on the line between the bridge stations of 5 sections (to the place of damage), and on the network 15 with packet switching. Upon elimination of the damage and resumption of reception of the control message of the control ring 1, the logical gap in the B-channels is restored.

When using to organize a bypass direction of the rings 1 of the upper level of the network 15 packet switched take appropriate measures to ensure a given time for message delivery and transmission of control signals.

In this case, the vacated part of the channel capacity of the primary network (PCC channels) can be used to organize general technological telephone communications, data transmission, OPS information and video surveillance.

The integrity of the ring 12 is monitored by sending the appropriate service message on the D-channel circulating in both directions through stations 5, 8 and 9. If the integrity of the ring 12 is violated, which is detected by the absence of reception of the ring control service message, the logical gap in the B-channels is removed. In this case, the signals in the B-channels of stations 8 and 10 arrive on the line of the bypass direction of the ring 12 (to the place of damage). Upon elimination of the damage and resumption of reception of the control message of the control ring 12, the logical gap in the B channels is restored.

Thus, the proposed digital system of operational-technological communication provides the opportunity to build operational-technological communication in railway transport using a smaller channel capacity of the primary network without deterioration of the main indicators of operational-technological communication systems.

Claims (1)

The system of digital operational and technological communication of railway transport, including a two-level ring network architecture based on lower and upper level rings, an administrative station with control panels is included in the main direction of the upper level ring, at each section of the operational and technological communication in one of the points of the lower level ring bridge station with control panels, and at other points - executive stations with control panels, executive and bridge stations are included after ovatelno in the main direction of the lower level ring, wherein the bridge station each portion operatively-process communication are included in the main direction of the upper level ring for forming the bypass lines of which stations installed at the ends of its main direction, through respective gateways are connected to a packet switched network.