RU107604U1 - SYNCHRONOUS MULTIPLEXOR WITH SUBSCRIBER ACCESS - Google Patents

Abstract

 A synchronous multiplexer with subscriber access, including a platform with system buses, to which removable modules made in the form of separate boards are connected, representing functionally independent devices, while the structure of removable modules installed on the platform includes channel forming modules with a speed of 155 Mbps, optical and electric, each of which is equipped with a function of receiving / transmitting, respectively, an optical signal for working on fiber-optic communication lines or an electric signal for working you are through wired electric communication lines, a control and monitoring module configured to monitor and configure your own parameters and module parameters, an Internet channel module for receiving / transmitting signals in the Internet protocol, a channel multiplexing module with a speed of 34368 kbit / s for receiving reception / transmission of a tertiary digital stream, a channel multiplexing module with a speed of 2048 kbit / s electric, interface modules for receiving / transmitting telegraph signals alov on 4-wire lines, receiving / transmitting signals at a speed of 64 kbit / s, receiving / transmitting signals C1-I, characterized in that the channel forming modules are structurally combined into one synchronous transport module with the ability to work depending on the configuration as in STM-1 with the reception / transmission of linear optical or electrical signals with a transmission speed of 155.520 Mbit / s, and in the STM-4 mode with the reception / transmission of optical signals with a transmission speed of 622.080 Mbit / s, while in the synchronous multipl

Description

The proposed utility model relates to multichannel communication devices and is intended for operation on public communication networks as equipment for a synchronous digital hierarchy, providing the transmission of E1, E3, Ethernet signals and subscriber access signals (AD) in the structure of synchronous transport modules of the STM-1 and STM level -four.

The GPT SMA-4 device implementing the STM-4 multiplexer is known, consisting of: tribe units with a set of electrical ports for receiving input streams of different speeds; multiplexer and switch for multiplexing, switching and flow control; optical units with output ports of 622.08 Mbps; power supplies; interfaces of control, management and service channels. (NN Slepov. Synchronous Digital Networks SDH. M. Eco-Trends, 1999). The disadvantage of this device is the inability to modify STM-4 in STM-1 without replacing the blocks, the inability to work with subscriber interfaces, as well as the lack of fully accessible non-blocking switching at the level of channel intervals and conference calls.

The closest device to the claimed device in terms of features is a flexible multiplexer, characterized by the presence of a platform with a high-speed system bus, to which modules made in the form of separate boards are connected, representing functionally independent devices, while the structure of removable modules installed on the platform includes channel forming modules with 155 Mbit / s optical and electric, each of which is equipped with a function of receiving / transmitting, respectively, an optical signal la for working on fiber-optic communication lines or an electrical signal for working on wired electric communication lines, a control and monitoring module configured to monitor and configure own parameters and parameters of modules, an Internet channel module for receiving / transmitting signals in a protocol Internet, a channel multiplexing module with a speed of 34368 kbit / s for generating tertiary digital stream reception / transmission, a channel multiplexing module with a speed 2048 kbit / s electric, interface modules for receiving / transmitting telegraph signals over 4-wire lines, receiving / transmitting signals at a speed of 64 kbit / s, receiving / transmitting C1-I signals. (patent for utility model No. 77527, class H04J 3/16, publ. 10/20/2008).

The disadvantages of this technical solution adopted for the prototype is that in the known device it is impossible to implement a synchronous transport layer STM-4 with a transmission speed of 622.080 Mbit / s, and also the conference call function is not implemented.

The utility model is based on the task of creating a multifunctional device of a synchronous digital hierarchy with the ability to quickly rebuild from the STM-1 transport layer to the STM-4 transport layer without installing additional equipment with user interfaces and fully accessible non-blocking switching, both at the level of virtual containers and at the level channel intervals, with the organization of analog and digital conferencing.

The technical result achieved in this case is to expand the functionality of the device, increasing the speed and volume of information transmitted.

This task is achieved by the fact that in a synchronous multiplexer with subscriber access, including a platform with system buses, to which removable modules made in the form of separate boards are connected, representing functionally independent devices, while the structure of removable modules installed on the platform includes channel forming modules with speed 155 Mbps optical and electrical, each of which is equipped with a function of receiving / transmitting an optical signal, respectively, for operation on fiber optic lines zi, or an electrical signal for working on wired electric communication lines, a control and monitoring module configured to monitor and configure its own parameters and parameters of the modules, an Internet channel module for receiving / transmitting signals in the Internet protocol, a channel multiplexing module with a speed of 34368 kbit / s for the formation of reception / transmission of a tertiary digital stream, a channel multiplexing module with a speed of 2048 kbit / s electric, interface modules designed e for the reception / transmission of telegraph signals over 4-wire lines, the reception / transmission of signals at a speed of 64 kbit / s, the reception / transmission of signals C1-I, a synchronous transport module is introduced that constructively combines the channelization modules into one module, with the ability to work depending from the configuration both in STM-1 mode with the reception / transmission of optical or electrical signals with a transmission rate of 155.520 Mbps, and in STM-4 mode with the reception / transmission of linear optical signals with a transmission rate of 622.080 Mbps, a switching, synchronization and service communication module was introduced, which provides equipment synchronization, fully accessible non-blocking cross-switching at the level of VC-4, VC-3, VC-12 virtual containers and the formation of a service communication channel with subscriber endings, a pairing module that provides VC virtual container pairing -12 from the switches of the synchronous digital hierarchy to the subscriber access switch at the E1 signal level, the subscriber access switch module providing fully accessible non-blocking switching of signals Catch E1 with a speed of 2048 kbit / s at the level of channel intervals 64 kbit / s with support for analog and digital conference communications, a secondary power supply module with redundancy, which converts the primary power supply to secondary power with filtering voltage interference, additional interface modules, installed depending on synchronous multiplexer configurations and designed for receiving and transmitting signals of the FXS, FXO, RS-232, RS-422, RS-485, V35, V36, X21, SDSL, Upn, Eth.

These features of the device are essential for solving the task and obtaining the desired technical result.

The present useful model of a synchronous multiplexer with subscriber access (hereinafter referred to as the SMD multiplexer) is illustrated by a specific example of execution and demonstrates the possibility of achieving a technical result.

Figure 1 shows a General view of the multiplexer SMD;

figure 2 shows a block diagram of a multiplexer with control buses;

figure 3 shows the structural diagram of the SMD multiplexer configured in STM-1 on the example of the load in the form of streams E1, E3 and the Internet (hereinafter Ethernet);

figure 4 shows a structural diagram of an SMD multiplexer configured in STM-4 mode;

figure 5 shows a structural diagram of the formation of the load in the form of subscriber interfaces.

The inventive device synchronous multiplexer with subscriber access consists of a platform with system buses 1, to which are connected removable modules made in the form of separate boards, representing functionally independent devices, while the removable modules installed on the platform include a synchronous transport module 2 with the ability to work in depending on the configuration as in the STM-1 mode with the provision of reception / transmission of linear optical signals for operation on fiber-optic communication lines or electrical signals to work on wired electric communication lines with a transmission speed of 155.520 Mbit / s, and in STM-4 mode providing reception / transmission of linear optical signals with a transmission speed of 622.080 Mbit / s, control and monitoring module 3, configured to provide monitoring and configuring your own parameters and parameters of the modules, the switching, synchronization and service communication module 4, which ensures equipment synchronization, as well as fully accessible non-blocking cross switching at the level of virtual containers V C-4, VC-3, VC-12 and forming an intercom channel with subscriber ends, a channel multiplexing module with a speed of 2048 kbit / s 5 electric for receiving / transmitting a primary digital stream, a channel multiplexing module with a speed of 34368 kbit / s 6 for the formation of the reception / transmission of the tertiary digital stream, the Internet channel module 7, designed to receive / transmit signals in the Internet protocol, the interface module 8, which provides the pairing of virtual containers VC-12 from the switches of the synchronous digital hierarchy in a subscriber access mutator at the E1 signal level, a subscriber access switch module 9 that provides fully accessible non-blocking switching of E1 signals at a speed of 2048 kbit / s at the level of 64 kbit / s channel intervals with support for analog and digital conference communication, interface modules 10, which are installed depending on from the configuration of the synchronous multiplexer and designed for receiving / transmitting telegraph signals over 4-wire lines, receiving / transmitting signals at a speed of 64 kbit / s, receiving / transmitting signals C1-I, reception / ne edachi signals FXS interface, FXO, RS-232, RS-422, RS-485, V35, V36, X21, SDSL, Upn, Eth, the secondary power module 11 with redundancy, ensuring conversion of primary to secondary supply voltage noise filtering.

Structurally, the SMD multiplexer is implemented in a block design (Fig. 1) - a case with a platform (cross-board), to which removable modules made in the form of separate boards are connected. Connections between the modules are carried out on the platform using the system buses (figure 2):

- Bus section header (Section Overhead) SOH;

- bus control and monitoring (GET / SET);

- synchronization bus;

- T / E1 tire;

- tires AI;

- payload tires.

In the given structural diagrams of the SMD multiplexer, the following fundamental notations are used:

C-n - containers of level n (n = 1, 2, 3, 4);

C-12 - a container to be dispatched along a certain route and carrying information (useful) load from the access channel with the component signal E1;

VC-n - virtual containers of level n (n = 1, 2, 3, 4);

GFP - frame formation protocol;

VCAT - virtual concatenation procedure;

VC-12 is a virtual container of level 1, the structure of which is composed of the RON route header (Path Overhead), which carries control information, and payload (PL):

VC-12 = POH + PL;

TU-n - tribal blocks of level n (n = 1, 2, 3, 4);

TU-12 is a component block, the format of which consists of a block pointer (PTR) related to the corresponding virtual container, and the VC-12 container itself:

TU-12 = PTR + VC-12;

TUG-n - groups of tribal blocks of level n (n = 2, 3);

VC-4 is a virtual container of level 4, the format of which consists of a pointer and the payload of each container:

VC-4 = PTR + PL

AU-4 is an administrative unit of level 4, the format of which is composed of the pointer of the administrative unit that defines the address of the beginning of the payload field, and the payload formed as 1x VC-4:

AU-4 = PTR + PL (1 × VC-4).

Synchronous transport module - the main element of the SDH multiplexing structure; The STM-1 (4) format consists of a section header (ZON) and AU-4 payload:

STM-1 = SOH + PL (1 × AU-4).

STM-4 = SOH + PL (4 × AU-4).

SOH contains information about the structure of STM-N, transmission quality control, and service communications.

Operation management of the SMD multiplexer is carried out by a network management system (Network Management System - NMS) using built-in microprocessor devices from a local or remote terminal (Fig. 2) connected by an Ethernet network to the control and monitoring module 3 of the multiplexer.

The control and monitoring module 3 (hereinafter referred to as the UK module) (FIG. 1) provides full-featured monitoring and control of the modules locally and remotely with the setting of operating modes and control of protective switching, storing information about the configuration made earlier after turning off the power. The NMS system performs the following functions:

- NMS access control, which consists in administering users;

- configuration management, which consists in creating and editing communication network diagrams, creating and configuring network elements, switching signals, setting equipment operating modes;

- Administration, which consists in the function of starting NMS; getting a full list of emergency events; report on the operator’s management actions for the specified period of time;

- troubleshooting management, which consists in the detection, registration, classification of accidents by categories of severity, displaying complete information about accidents.

- control of technical characteristics of the equipment.

Synchronous transport module 2 (hereinafter referred to as STM1 / 4 module) (Fig. 1), operates depending on the configuration in STM-1 mode (Fig. 3), providing reception and transmission of four linear optical or electrical signals with a transmission rate of 155.520 Mbit / s in addition, in the STM-4 mode (Fig. 4), providing the reception and transmission of two linear optical signals with a transmission rate of 622.080 Mbit / s, also performs the function of allocating the synchronization frequency with equalization of the payload on the SDH frame cycle, access to bytes of the section header SOH, data processing, before ted on the service data channel (DCC) service channel and voice communication, as well as monitoring the quality of a top-level routes. Up to two CTM1 / 4 modules can be installed in the SMD multiplexer, with eight linear optical or electrical signals being received and transmitted in STM-1 mode, and four linear optical signals in STM-4 mode.

The switching, synchronization and service communication module 4 (hereinafter the KS-SS module) (Fig. 1, Fig. 5) provides:

- routing flows between different channels of network users by means of fully accessible non-blocking cross-switching between them. Cross-switching is carried out at the level of virtual containers VC-4, VC-3 and VC-12.

- system synchronization from different sources:

- from an internal generator 2048 kHz;

- from an external signal 2048 kHz;

- from an external signal 2048 kbit / s;

- from any of the input signals E1, E3;

- from any of the linear signals of the STM-1.

- switching of synchronization inputs between the reference signals in the automatic (by priority when the reference signal disappears) mode;

- organization of official communication for personnel service on a channel with a two-wire subscriber termination with the possibility of an individual call of a subscriber, a call of a group of subscribers;

- connection of two PM channels in four-wire switching mode for the organization of transit connections between network elements not connected to each other via the STM-N channel.

The channel multiplexing module with a speed of 2048 kbit / s 5 (hereinafter referred to as the E1 module) (Fig. 3) provides asynchronous or synchronous input / output of up to 21 E1 streams (2048 kbit / s):

- asynchronous, when the frequency of the input signal E1 does not depend on the group frequency of the multiplexer (synchronization of the SMD and the source E1 are formed from various master oscillators). The advantage of asynchronous placement is the versatility of use - there is no need for general synchronization of transport and terminal equipment;

- synchronous, when the frequency of the input signal is “tied” to the group frequency of the multiplexer. Synchronous mode allows you to receive an output signal with less jitter, which in combination with the “Retiming” function allows you to use it to synchronize downstream equipment.

Any of the received E1 signals can be used as a reference signal source for the synchronization system. Parameter control and selection of E1 port modes is done through network software. It is possible to install up to four E1 modules in the SMD multiplexer, while the number of E1 interfaces increases to 84.

The channel multiplexing module with a speed of 34368 kbit / s 6 (hereinafter referred to as the E3 module) (FIG. 1, FIG. 3), provides reception-transmission of up to 3 E3 I / O interfaces with a speed of 34368 kbit / s per one module. It is possible to install up to four E3 modules in the SMD multiplexer, while the number of E3 interfaces increases to 12.

The Internet channel module 7 (hereinafter, the Eth10 / 100 module) (FIG. 1, FIG. 3) provides reception-transmission from one to four linear Ethernet signals 10/100 Mbit / s, and the more connecting ports are given for the Ethernet channel, the more speed in the channel. The maximum transfer rate is 91.392 Mbps. It is possible in the SMD multiplexer to receive and transmit up to 10 Ethernet interfaces. Through software, parameters are controlled and the port modes are selected: Full Duplex 100 Mbps, Half Duplex 100 Mbps, Full Duplex 10 Mbps, Half Duplex 10 Mbps, Auto Negotiation.

Interface module 8 (hereinafter T / E1 module) (Fig. 1, Fig. 5) provides the conversion of 84 synchronous, E1 signals from the switches of the KS-SS module to the switch of the subscriber access module (CAD), input / output of up to 8 synchronous / asynchronous signals E1.

The subscriber access switch module 9 (hereinafter referred to as the CAD module) (Fig. 1, Fig. 5) provides fully accessible non-blocking switching of E1 signals at the level of channel intervals up to 316 directions, organizes up to 31 conference communication groups, performs input / output of 8 synchronous E1 streams.

Interface modules 10 (hereinafter referred to as AD subscriber access modules) are installed depending on the configuration of the synchronous multiplexer and are designed to organize terminal and transit channels, receive / transmit signals with a transmission speed of 64 kbps, receive / transmit SI signals, receive / transmit FXS interfaces, FXO, RS-232, RS-422, RS-485, V35, V36, X21, C1-I, SDSL, Upn, Eth, telegraph communication.

The secondary power supply module 11 (hereinafter referred to as the IVP module) with 1 + 1 redundancy provides the conversion of the primary power supply to the secondary power supply with filtering of voltage noise.

The principle of operation of the multiplexer is based on the technology of the synchronous digital hierarchy SDH, in which the synchronous transport module STM is adopted as the main format of the synchronous signal, which allows direct access to the channels of the plesiosynchronous PDH hierarchy.

The structure of the signal generation STM-1 based on a synchronous multiplexer with subscriber access SMD on the example of the load in the form of streams E1, E3 and Ethernet when configuring a synchronous transport module STM1 / 4 in STM-1 mode is shown in Fig.3.

In the E1 5 module, equalization bits (PL), as well as other fixing, control and packing bits are first added to the load in the form of an E1 stream (2,048 Mbit / s) in order to form a C-12 container. Then, a route header (RON) is added to the S-12 container with the route information in order to form a virtual VC-12 container. Adding a pointer byte (PTR) to the virtual container forms the TU-12 tribe block. The sequence of tribal units TU-12 as a result of byte multiplexing 3: 1 turns into a group of tribal units TUG-2. The TUG-2 sequence is subjected to repeated byte-multiplexing 7: 1, as a result of which a group of tribal blocks TUG-3 is formed. By multiplexing three TUG-3s and adding the RON route header to the obtained sequence, a virtual container VC-4 is formed, which enters the KS-SS 4 module.

The formation of the load in the form of an E3 stream (34368 Mbit / s) occurs in the E3 6 module (Fig. 3) with the addition of equalization bits (PL), as well as other fixing, control and packing bits in order to form a C-3 container. Then, a route header (RON) with route information is added to the C-3 container to form a virtual VC-3 container. Adding a pointer to the virtual container (PTR) forms the TU-3 tribe block, which translates to TUG3. By multiplexing three TUG-3s and adding the RON route header to the obtained sequence, a virtual container VC-4 is formed, which enters the KS-SS 4 module.

The load shaping in the form of an Ethernet stream takes place in the Eth 10/100 7 Module (Fig. 3), which uses the GFP protocol to form the WAN interface (from one to four). Then, the WAN interface bandwidth is adjusted by combining VC-12 virtual containers into a group (via VCAT) and then combining them into tributary groups TUG-3 and VC-4. Each component Ethernet port corresponds to NxVC-12 connecting ports, (N = from 1 to 42), interconnected via the VCAT function. The number of connecting ports N for the Ethernet channel is determined by the operator based on the availability of free VC-12s in the STM-N aggregate channel. Then the created virtual container VC-4 enters the module KS-SS 4.

The formation of the load in the form of subscriber interfaces is presented in figure 5 and occurs as follows. AD 10 modules are installed depending on the configuration of the SMD multiplexer. In the modules, the incoming signals are digitized and occupy the channel intervals provided by them in the AI buses as part of the E1 streams. Then, the flows E1 arrive at the CAD module 9, which provides fully accessible non-blocking switching of flows E1 at the level of channel intervals up to 316 directions. From the subscriber access switch module via the T / E1 bus, E1 streams are loaded into the T / E1 8 interface module, which ensures their placement in VC-12 virtual containers with subsequent integration into the TUG-3 and VC-4 tributary groups, which enters the KS module CC 4.

In the KS-SS 4 module, flows are routed between different channels of network users by means of fully accessible non-blocking cross-switching between them. Cross-switching is carried out at the level of virtual containers VC-4, VC-3 and VC-12.

In the synchronous transport module CTM1 / 4 2 (FIG. 3), AU4 is first formed by adding an AU-4 PTR pointer. The addition of the sectional header SOH, which consists of two parts: the header of the regenerative section RSOH and the header of the multiplex section MSOH finally forms the transport module STM-1.

When reconfiguring the synchronous transport module CTM1 / 4 from CTM1 to CTM4, four streams of STM-1 are multiplexed into one STM-4 (Fig. 4). At the same time, the transmission speed of information increases, moving from 155.520 Mbit / s to 622.08 Mbit / s and, consequently, the amount of transmitted information increases.

In the presented device, the CAD module 9 implements the function of analog voice conference calling, which consists in the possibility of simultaneous, joint conversation of communication subscribers, as well as the function of digital conference call, which consists in the possibility of simultaneous, joint communication of digital devices, such as modems, computers. The CAD module solves the problem of combining communication subscribers into a single group at the level of channel intervals, and the module can form up to 31 conference communication groups, while the total capacity of each group is 316 × 31 channel intervals. The groups are formed using the NMS program when configuring the network, and it determines which channel interval of the E1 stream to be distributed to which conference of 31 groups. The connection route is set in the controller of the CAD module. Conferencing implementations enhance the functionality of the utility model.

This utility model is manufactured and industrially applicable on communication networks of a synchronous and plesiosynchronous digital hierarchy of linear, annular, star-shaped and mixed structures for solving various problems as a terminal multiplexer, input / output, cross-switch and access multiplexer in working with transport streams of the STM- level 1 and STM-4 with the ability to input / output a wide range of user interfaces and fully realizes the task.

Claims (1)

A synchronous multiplexer with subscriber access, including a platform with system buses, to which removable modules made in the form of separate cards are connected, representing functionally independent devices, while the structure of removable modules installed on the platform includes channel forming modules with a speed of 155 Mbps, optical and electric, each of which is equipped with a function of receiving / transmitting, respectively, an optical signal for working on fiber-optic communication lines or an electric signal for working you are through wired electric communication lines, a control and monitoring module configured to monitor and configure your own parameters and module parameters, an Internet channel module for receiving / transmitting signals in the Internet protocol, a channel multiplexing module with a speed of 34368 kbit / s for receiving reception / transmission of a tertiary digital stream, a channel multiplexing module with a speed of 2048 kbit / s electric, interface modules for receiving / transmitting telegraph signals alov on 4-wire lines, receiving / transmitting signals at a speed of 64 kbit / s, receiving / transmitting signals C1-I, characterized in that the channel forming modules are structurally combined into one synchronous transport module with the ability to work depending on the configuration as in STM-1 with the provision of reception / transmission of linear optical or electrical signals with a transmission rate of 155.520 Mbit / s, and in the STM-4 mode with the reception / transmission of optical signals with a transmission rate of 622.080 Mbit / s, while in the synchronous multipl a quarrel with subscriber access, a switching, synchronization and service communication module has been introduced, which ensures equipment synchronization, as well as fully accessible non-blocking cross-switching at the level of virtual containers VC-4, VC-3, VC-12 and the formation of a service communication channel with subscriber endings, a pairing module providing VC-12 virtual containers interconnection from the switches of the synchronous digital hierarchy to the subscriber access switch at the E1 signal level; the subscriber access switch module providing full stupid non-blocking switching of E1 signals at a speed of 2048 kbit / s at the level of 64 kbit / s channel intervals with support for analog and digital conference communications, a secondary power supply module with redundancy, which converts primary power to secondary power with filtering voltage interference, additional interface modules are also introduced , installed depending on the configuration of the synchronous multiplexer and designed for receiving and transmitting signals of the interfaces FXS, FXO, RS-232, RS-422, RS-485, V35, V36, X21, SDSL, Upn, Eth.