RU2255429C1 - Burst-switching distribution communication system for stationary and fixed subscribers - Google Patents

Abstract

FIELD: telecommunications; construction of burst-switching distributed communication systems (networks).

SUBSTANCE: proposed burst-switching distributed communication system meeting all advanced requirements to data transmission and designed for use in megapolises and in densely populated regions (cities) has junction stations disposed at locations of most densely crowded subscriber terminals; each junction station is connected to at least four adjacent junction stations via fiber-optic lines forming network architecture in the form of reference grid; each junction station has transceiving junction point connected to fiber-optic lines and to channel-forming junction point; the latter is connected to direction switching junction point, information service switching junction point, and trunk-communication switching junction point, subscriber communication junction point being connected to these junction points and via subscriber lines, to subscriber terminals; direction switching junction point similar in design to information service switching junction point and to automatic trunk communication switching junction point has transit junction point connected to channel-forming junction point and to subscriber junction point; direction comparison unit connected to channel-forming junction point, subscriber junction point, and direction address memory unit; and also control unit connected to transit junction point, direction address memory unit, and comparison unit; junction stations disposed near mobile communications base stations have their channel-forming junction points connected by means of fiber-optic line to mobile communications base station; junction stations residing near trunk exchanges have their channel-forming junction points connected by means of fiber-optic lines to trunk exchanges, and junction stations disposed near information service rendering junction points have their channel-forming points connected by means of fiber-optic line to information service rendering junction point; junction stations residing near telephone exchanges have their channel-forming junction points connected via fiber-optic lines to telephone exchange; channel-forming junction point has at least three channel-forming units and transceiving junction point has at least three transceiving units, each being connected through at least four fiber-optic communication lines to junction stations adjacent with respect to reference grid.

EFFECT: enhanced effectiveness and reduced cost of broadband communication system due to its minimized proximity of subscriber terminals.

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Description

The invention relates to the field of telecommunications, in particular to the construction of distributed communication systems (networks) with packet switching. The invention can be used to build communication networks in megacities and areas with a high population density (cities).

Packet-switched telecommunication systems are known, comprising a plurality of switching nodes, connected to a ring with each node serving a plurality of terminals and intended for assigning real-time packet addresses for dynamically supported bandwidth in a blocking communication network, i.e. in a system where the number of packet addresses is less than the number of network stations (EP 0256526 A, H 04 L 12/64, 1988).

The disadvantage of this solution is that the blocking system requires the dynamic distribution of packet addresses using a centralized device, as well as separate and sequential transmission of control packets and message packets to ensure connectivity. Using the central device of the blocking system leads to the need for significant processor resources and associated control bandwidth for control and dynamic assignment of packet addresses. In addition, the use of a centralized device requires a redundancy circuit to avoid failures at the central address of the memory cell, which disable the system.

Other packet switched communication systems are also known (SU 1069185 A, H 04 L 12/64, 1984, EP 0119105 A, H 04 L 12/64, 1984, US 5187740 A, H 04 L 12 / 64.1993, SU 1626444 A1, H 04 L 12/64 1991).

The disadvantages of these systems is the high cost of system elements, mainly cable lines connecting subscriber terminals to stations. In addition, the disadvantages of the known systems include the insufficient bandwidth of the systems in order to operate with such information as video and multimedia, as well as the fact that large switching stations are required.

The closest in technical essence to the proposed invention is an expandable telecommunications system (RU 2154346 C1, H 04 L 12/64, 08/10/2000).

An expandable telecommunication switching system comprising a plurality of programmable telecommunication switching means for dynamically connecting or disconnecting communication lines with respect to different ports from among them, in which each of said telecommunication switching means includes: means for temporarily switching information sent to or from said ports, each of these means for temporary switching has a switching capacity corresponding to th to the maximum number of ports that may be physically associated with said means; means for transmitting and receiving packetized information; means connected with the possibility of exchanging data with said switching means for forming an interface with one or more public or private networks representing said ports, said means connected with the possibility of exchanging data, comprising a bus for transferring data to and from said ports, and means for connecting to each other the specified set of telecommunication switching means with the ability to exchange data and with the possibility of collaboration with the specified by transmitting and receiving means for transferring said packetized information between said telecommunication switching means, so that information, including channel switching data sent from any port of any of said telecommunication switching means, can be transmitted substantially continuously to any other port of the same or other telecommunication switching facilities.

The disadvantages of the known system include the great complexity of the equipment at each station, since they are fully processed information. In addition, the cost of the system, consisting mainly of the cost of subscriber lines, in view of their length is significant.

The technical result of the invention is to create an effective broadband communication system that meets modern requirements for the transmission of information and at the same time has a low cost due to the fact that subscriber lines are minimized by the approximation of the hub stations to the subscriber terminals.

To this end, a distributed communication system with packet switching for stationary and fixed subscribers is proposed, comprising node stations located in places with a high density of subscriber terminals, each node station being connected to at least four neighboring node stations by fiber-optic lines, forming network architecture in the form of a coordinate grid, with each node station containing a transceiver node connected to fiber optic lines and to a channel-forming evil, while the channel-forming node is connected respectively to the direction switching node, the information services switching node, and the long-distance communication switching node, to which the subscriber node is connected, to which the subscriber terminals are connected by subscriber lines, while the direction switching node, made similarly to the information service switching node and a long-distance communication switching unit, contains a transit node connected to a channel-forming node and a subscriber node, a direction comparison unit, is connected a channel-forming unit, a subscriber unit and a directional address memory unit, as well as a control unit connected to a transit unit, a directional address memory unit and a comparison unit, and at the node stations located close to the base stations of mobile communication, the channel-forming unit is connected with a fiber-optic a line with the base station of mobile communications, at the junction stations located near automatic long-distance telephone exchanges (АМТС), the channel-forming node is connected by a fiber-optic line to Automatic telephone exchange, and at the node stations located near the information service centers, the channel-forming node is connected by a fiber-optic line to the information service center, while at the node stations located near the automatic telephone exchanges, the channel-forming node is connected by a fiber-optic line with the PBX, and the channel-forming node contains at least three channel-forming blocks, and the transceiver node contains at least three transceiver blocks, each of which which is connected with at least four fiber-optic lines connected to neighboring nodes along the coordinate grid.

Figure 1 presents the structural diagram of a distributed communication system with packet switching for fixed and fixed subscribers. Figure 2 presents the structural diagram of the nodal station. Figure 3 presents the structural diagram of the node switching directions, performed similarly with the node switching information services and the node switching long distance communication.

A distributed communication system with packet switching for fixed and fixed subscribers contains nodal stations 1, base stations of a mobile communication system 2, long-distance telephone exchanges 3, information service centers 4, automatic telephone exchanges 5, a channel-forming node 6, a switching node for directions 7, a switching node information services 11, long-distance communications switching node 12, transceiver node 10, subscriber node 8, subscriber terminals 9, memory unit 13, direction comparing unit 14, transit zel 15, the control unit 16.

A distributed communication system with packet switching for fixed and fixed subscribers works as follows:

Work is carried out by batch transmission of information in a synchronous manner.

The whole region is divided into four parts, which can coincide with the cardinal points and have arbitrary shapes and sizes. Let us consider the operation of the system by the example of information transfer from a subscriber terminal included in the node station A, located in the eastern part of the region, to a subscriber terminal included in the node station B, located in the northern part of the region.

The numbering of subscriber terminals in this communication system provides for the beginning of the number with a number indicating the region (for example, south - 1, west - 2, north - 3, east - 4). The subscriber of the terminal included in the node station A, dials a number starting with the number 3, followed by numbers indicating the number of the node station B (for example, 32x-aaa, where x is the number of the node station, and aaa is the number of the subscriber terminal) and further followed by the number of the required subscriber terminal.

This number goes to the subscriber node 8 of the node station A, which can be made in the form of a mini-automatic telephone exchange. From the subscriber unit 8, the number enters the direction switching node 7, where it is compared in the direction comparison unit 14 with the numbers recorded in the memory unit 13. First, the first digit of the number is compared, and if it does not coincide with the figure characterizing the region in which it is located this nodal station (in our case this is not 4), using the transit node 15 at the command of the control unit, all information is transmitted through the corresponding channel-forming block of the channel-forming node 6 and the corresponding transceiver a transceiver unit assembly 10 to the nearest node station 1 towards the north. At this nodal station, only the first digit of the number is also analyzed and further transit of information is carried out. At the node station 1 of the region north, the first digit of the number coincides with the number of the region and further comparison of the digits of the number (in our example 32x) is carried out and further information is transferred (without complete processing) until it reaches the node station with the specified number. At this nodal station, information in the form suitable for processing by the subscriber unit 8 is fed to the specified node, which makes the call to the necessary subscriber terminal 9. Moreover, since the packet information is transmitted, data about the subscriber terminal of the sender is present at the receiving subscriber to organize the transmission of feedback information .

When intercity communication is carried out, similar actions are carried out with the difference that the first digit of the dialed number does not reflect the region but the exit to the intercity station, and the intercity switching center 12 transmits information to the nearest intercity station 3 by transit without complete processing of the transmitted information at each nodal station 1 (at each reception center).

Similarly, calls are made to information service centers 11, which include multimedia services (watching TV programs, listening to music, etc.), and communicating with mobile subscriber terminals through base stations of the mobile communication system 2 and subscribers of the automatic telephone network via automatic telephone exchanges 5. The latter allows you to combine the proposed system with an existing telephone system. Since separate channel-forming and transceiving units are used to communicate between subscriber terminals 9 of this system, to make long-distance communications and to call information service centers 11, the total number of fiber-optic lines that are suitable for node station 1 connected to four neighboring node stations (for coordinate structure) and not connected PBX 5, the base station of the mobile communication system 2, the center for the provision of information services 11 and long-distance the telephone exchange is 4 (directions) × 3 (the number of transceiver units) x 2 (receive / transmit) = 24 lines. Since no complete information processing is performed during transit, the implementation of the system elements is straightforward, and when using a modern electronic base, the nodal station is slightly more expensive than the mini-automatic telephone exchange itself. Distributed communication system with packet switching for fixed and fixed subscribers allows for communication in a wide range of frequencies and is quite simple and cheap to implement.

Claims (3)

1. A distributed communication system with packet switching for fixed and fixed subscribers, containing node stations located in places with a high density of subscriber terminals, with each node station connected to at least four neighboring node stations with fiber optic lines, forming an architecture network in the form of a coordinate grid, and each node station contains a transceiver node connected to fiber optic lines and a channel-forming node, while the channel the forming unit is connected respectively to the direction switching node, the information services switching node and the long-distance communication switching node to which the subscriber node is connected, to which the subscriber terminals are connected by subscriber lines, the direction switching node made identically with the information services switching node and the long-distance switching node connection, contains a transit node connected to the channel-forming node and the subscriber node, a direction comparing unit connected to the channel-forming a node, a subscriber node and a memory unit for addressing directions, as well as a control unit connected to a transit node, a memory unit for addressing directions and a comparison unit, and at the node stations located near the base stations of mobile communication, the channel-forming node is connected by a fiber-optic line to the base a mobile communication station, at the node stations located near automatic long-distance telephone exchanges (АМТС), the channel-forming node is connected by a fiber-optic line to the АМТС, and at the nodal stations second, in the vicinity of the centers provide information services, channelization node connected to a fiber optic line to the center of information services. 2. A distributed communication system with packet switching for fixed and fixed subscribers according to claim 1, characterized in that for the node stations located near automatic telephone exchanges (PBX), the channel-forming node is connected by a fiber-optic line to the PBX. 3. A distributed communication system with packet switching for fixed and fixed subscribers according to claim 1 or 2, characterized in that the channel-forming node contains at least three channel-forming blocks and the transceiver node contains at least three transceiver blocks, each of which is connected to at least four fiber-optic lines connected to neighboring nodes on the grid.

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