EA021346B1 - System of digital operative-technological communication of railway transport - Google Patents

Abstract

The invention relates to digital electrical communication and can be used at railway transport for facilitating operative-technological communication of personnel in charge of train movement. The technical result is aimed at optimization of channel resources of primary networks of operative-technological communication based on principle of dynamic changed of accessibility depending upon category of information-control system of the technological process and a user by using bridge stations installed at extreme points connected therebetween by a ring of the upper level of hierarchy and with the actuating stations by the main direction of the lower ring. The system comprises a double-level token-ring architecture network based on rings of lower and upper levels, the upper level ring includes a regulating station with control boards, at each section of operative-technological communication in extreme points of the lower level ring bridge stations with control boards are mounted, and at each intermediate points - an actuating station with control boards, wherein the actuating stations are connected in series and positioned between bridge stations for forming the main direction of the lower level ring, wherein bridge stations are included into the upper level ring for forming a bypass direction of the lower level ring.

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 the well-known method of constructing a multi-ring hierarchical network and containing 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 for information transfer between rings of different levels of the hierarchy, with the central station and commutating interconnected in ring of the upper level of the hierarchy (KI 2127489, Н04В 10/12, 4041 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 interconnected in a 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 for the transmission of conversational signals and the Ό-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 (KI 2289208, Н04В 10/12 , Н04В 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 digital process 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 main digital channels (BCC), combining 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 level 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 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 upper ring, at each section of the operational and technological communication at the extreme points of the lower ring

- 1 021346 level, bridge stations with control panels are installed, and in each intermediate point there is an executive station with control panels, executive stations are connected in series and connected between bridge stations to form the main direction of the lower level ring, to form a bypass direction of which bridge stations are included in the ring top level.

The drawing shows a structural diagram of one embodiment of a digital operational technological communication system.

The system comprises an administrative station 1 with control panels 2 installed in a single control center and connected to a ring 3 of the upper level.

At each point of the operational-technological communication, bridge stations 4 with control panels 5 are installed at its extreme points, and at each intermediate point there is an executive station 6 with control panels 7. In this case, the executive stations 6 are connected in series and connected between the bridge stations 4 with the formation of the main direction of the ring 8 of the lower level.

To form a bypass direction of the lower level ring 8, the bridge stations of 4 sections are included in the upper level ring 3.

The system of digital operational-technological communication of railway transport includes a two-level ring network architecture based on rings 3 and 8 of the upper and lower levels. Rings 8 of the lower level cover sections of the railway in one direction. The upper level rings 3 combine the lower level rings 8.

The upper level ring 3 is used to relay information between the lower level rings 8 and the administrative station 1 within the railway section.

Ring 3 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 1 of the dispatch control center. In the equipment of bridge and administrative 4 and 1 stations, a semi-permanent connection of the channel intervals of the rings 8 and 3 of the lower and upper levels is made in accordance with the scheme of dispatcher communications in each direction.

The composition of the ring 8 of the lower level can include up to 40 executive stations 6. Each ring 8 of the lower level is formed on the basis of a beam of primary digital channels (PCC) with a data stream E1 of 2048 Kbps in each. The amount of PCC in the beam depends on the total information flow in the ring of the lower level. Each CCC channel contains 32 bcc channels.

Ring 3 of the upper level is formed on the basis of a beam of primary digital channels. The amount of PCC in the beam 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 Ό-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 of 3 or 8 (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 канале-channel of rings 3 and 8 of the PCC of the upper and lower levels. 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 OTC subscribers, as well as service messages to ensure 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 the executive stations 7, 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 transmitted in two directions with communication to all ring stations.

In each ring 3 and 8 of the PCC, a dot is used to prevent speech circulation in the B channels

- 2 021346 logical break. 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 on 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 service message Ring control in the ACS of the PCC ring continues, 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 канал-channel of ring 3 and 8 of the upper or lower level central control center are transmitted simultaneously in two directions - along both arcs of the ring, with the mandatory transmission of messages to all stations of the ring.

To prevent messages from circulating in the ring, the message cancellation procedure 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 for the executive stations 6 of the lower level ring 8 is part of the upper level ring 3. The logical break point in the B-channels of the lower level ring 8 is organized at one of the bridge stations 4 (at the main station of the ring 8) between the rings 3 and 8 of the upper and lower levels. The integrity of the ring 8 is monitored by sending the appropriate service message. The ring is monitored on the канал-channel circulating between the bridge stations 4 through the executive stations and in part of the upper level ring 3. In the absence of reception of the control message of the control ring 8, the logical gap in the B-channels is removed. In this case, the signals in the B-channels of the executive stations 6 of the intermediate points come both along the line between the bridge stations 4 (to the point of damage), and along the part of the ring 3 of the upper level.

When the damage is eliminated and the reception of the control message of the ring 8 is resumed, the logical gap in the B-channels is restored. At bridge stations 4, when moving from the lower level ring 8 to the upper level 3 ring, the messages are analyzed: if the messages are signal, then they are transmitted on both sides of the ring, if the service (Ring control), then in one, predetermined. Service message The control of the ring of the lower level circulates only within the ring 3 of the upper level between the bridge stations 4, limiting the site.

Service message The control of the upper level ring, formed at the main station, for example, station 1 of the ring 3 of the upper level, is transmitted in the direction opposite to the transmitted service messages for rings 8 of the lower level.

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)

CLAIM A digital operational-technological communication system for railway transport containing a two-level ring network architecture based on lower and upper level rings, while the upper level ring contains an administrative station with control panels, bridge stations are installed at each section of the operational-technological communication at the extreme points of the lower level ring with control panels, and in each intermediate point - executive stations with control panels, executive stations are connected in series bridge connected between ground stations to form a lower ring-direction, bridge station included in the top level of the ring for forming the bypass areas of the lower level ring.