RU70433U1 - ACCESS MODULE - Google Patents

Abstract

The utility model relates to the field of wireless communications and is designed to operate as part of first-level radio-relay equipment when organizing zone and local communication lines. The main technical task is to create a modular design that allows you to change the configuration and group speed in operating conditions. The access module includes a built-in direct single multiplexing multiplexer 1, a replaceable generator unit 8 and a software change port, with the nodes of the main channel interface 4, Ethernet 6 interface, additional channel interface 5 and power supply 9 made in the form of replaceable blocks, and the main interface unit channel 4 is made in the form of a channel interface 16x E1 or E2 or E3, and the intercom node 7 is made in the form of a two-wire termination interface. 1 ill.

Description

The utility model relates to the field of wireless communications and is designed to operate as part of first-level radio-relay equipment when organizing zone and local communication lines. They allow you to build multi-span radio links of arbitrary topology.

Known access module MD1-1-xx (RE ...), which consists of a multiplexing unit, a main channel node, an Ethernet interface node, an additional channel interface node, a service communication node, a power node.

The disadvantage of this design is the impossibility of replacing nodes, so several modifications are available that allow you to organize the transfer of the main stream only of a certain type and a certain group speed. The lack of bit stuffing led to a short-term failure of the entire line in case of failure of one of the stations. Change of station software was carried out only at the manufacturer. For the user, all this caused some inconvenience during operation. In addition, to organize the flows of E1, it was necessary to use a separate device.

The main technical task of the proposed solution is the creation of a modular design that allows you to change the configuration and group speed in operating conditions.

The technical result of the proposed solution is to increase the payload to 18 E1 streams.

The main technical problem is achieved by the fact that in the access module, including the multiplexing unit, the main channel interface node, the Ethernet interface node, the secondary channel interface node, the service communication node, the power supply, according to the proposed solution, is introduced

a built-in direct single multiplexing multiplexer, a generator unit and a software change port, and the nodes of the main channel interface, Ethernet interface, additional channel interface are made and the power supply unit is made in the form of replaceable blocks, and the main channel interface unit is made in the form of a channel interface 16x E1 or E2 or E3, and the intercom node is made in the form of a two-wire termination interface.

Figure 1 presents the structural diagram of the access module.

The access module consists of a multiplexing unit 1, a pairing unit 2, 3 with a transceiver (PPU), a main channel unit 4, an additional channel 5 interface unit, an Ethernet 6 interface unit, an intercom unit 7, a generator unit 8, a power supply 9.

Multiplexing unit 1 - performs multiplexing-demultiplexing of the main streams and additional channels using bit stuffing, performs the functions of control and signaling, tele-control and tele-signaling. It collects information and controls the module blocks and transfers information to a PC.

Using transit ports, data transit is organized at intermediate and nodal stations. The built-in switch allows the input and output of data flows E1.

Interfacing blocks 2, 3 with PPU - carry out the restoration of the signal coming from the PPU, protection against short circuit on the power supply in the reduction cable, from supplying the increased / low voltage supplied to the PPU and separate the digital stream, remote control and telemetry signals of the PPU and the power supply voltage of the PPU for transmission of all signals on one cable. To configure the 1 + 1 backup system, 2 units are required.

The block of the main channel 4 - provides the data transmission of the DS of eighteen E1 streams with a speed of 2048 kbit / s (Rec. G.703), the restoration of the signal and clock frequencies, suppression of the jitter.

Interface block of additional channel 5 - supports either the built-in channel with RS-232, RS-422, RS-485 interfaces, or the connection of the access module of additional channels MD-DK-1 with the possibility of using up to six channels at a speed of 64 Kbps.

Ethernet 6 interface unit - allows you to transfer traffic according to the Ethernet-10 / 100WT standard, the channel width is assigned with a N × E1 discrete.

Block of generators 8 - sets the required frequency of the module and restores the clock frequencies of the DS trunks.

Power supply 9 - provides power to the module blocks with the necessary voltage, redundancy of the primary power, filtering interference.

Service communication unit 7 - is intended for voice communication between the service personnel of radio relay stations according to the point-to-point scheme.

The intercom interface is made in the form of a two-wire subscriber (FXS) interface, providing a telephone connection.

The operation of the device is as follows.

The digital stream multiplexer 1 receives a digital signal (DS) from the main channel unit 4 of the corresponding interface (E1, E2 or E3).

At the same time, data is being collected from the interface unit of the additional channels 5, the Ethernet unit 6, the control channel of the BUKS and TUTS, the digital intercom channel 7. A group digital stream is generated, into which are added channels of bit-stuffing of the main and additional channels, bits of group and super-cycle synchronization cyclic redundancy code (CRC) data. The received digital signal is encoded by the HDB-3 code and transmitted to the interface unit with the control unit 3. The signal amplified by the driver of the corresponding barrel, passing through the connection scheme, enters the cable connecting the access module and the control unit.

The signals coming from PPU1 and PPU2 are fed to the interface devices of the barrel 2 and barrel 3, where the digital signal, the telemetry signal and the supply voltage are separated. Telemetry Signals

transmitted over a phantom circuit formed by transformers for transmitting the main digital stream. The digital signal is then fed to the automatic gain and correction control circuitry, which compensates for losses and frequency distortions in the cable, and then fed to the corresponding regenerator. Regenerators restore the shape of digital signals.

Next, the signal is fed to the demultiplexing unit, in which the signal is transcoded into the NRZ code, and the clock frequency is restored. Using bit-stuffing channels, the formation of frequencies corresponding to the initial speed of the digital streams of the main and additional channels is performed. The demultiplexing unit searches for and holds group and super-cycle synchronization necessary for the correct separation of group stream data. Based on synchronization, the node distributes the received data into additional channels, nodes TUTS and BUKS, the node communication service. In the case of joints E1, E2 E3, the main stream is encoded by the linear code HDB-3 and fed to the output of the module. In the case of the Ethernet interface, a specialized circuit recovers Ethernet frames, which then go to the output of the MD1-1P module.

In the process of receiving data by the demultiplexer, the correspondence of the received CRC values with the calculated ones is continuously checked, which allows to highlight the presence of bit errors that have occurred in the radio channel. The BUKS unit collects data on the state and operating modes of the PPU1 and PPU2 (if available), at the request of the user, displays this information on the PC, when control commands are received, it executes them or transmits commands to the corresponding PPU (depending on the type of commands).

When turned on, the TUTS node reads out its individual address set during station configuration. After establishing the correspondence of the RRL communication scheme with the communication scheme in the communication editor of the MASTER PSO, it is possible to carry out the routing procedure, in which

non-volatile memory of each TUTS node, a route map is recorded (station communications table with ports). Telemetric information (TUTS) can be transmitted through the formed transmission channels and inter-office connections. TUTS processes incoming data and broadcasts them in the direction of the destination station. Upon receipt of the packet, the destination station retrieves the command contained in it and executes it or transfers it to the actuator (node BUKS). This is how data is collected about the modes and parameters of transceivers and the station as a whole. Remote commands are executed according to a more secure algorithm: the command is executed only if, within a certain time, the TUTS node receives two copies of one command. Otherwise (for example, with transmission errors), the controller will time out from the standby mode of the command for execution and the process starts again.

The “signal / control” channel port allows you to read the values of 8 signaling channels of any station and set the values of 8 control channels to arbitrary states, as well as record the “default” values of the control channel outputs.

Remote monitoring and control of the RRL network is carried out when a computer is connected to the station port. The access module has a CAN interface for attaching to it the MD-DK-1 modules, IBEP-220/48-xx power supplies and including them in a common monitoring and control system. Using transit ports, you can organize data transit to the ORS, as well as the PPC node.

The modular design of the device allows the user to easily add or replace the necessary unit, as well as change the channel speed to the transmission speed of the PPU. In addition, the status of discrete channels can be displayed on any assigned station, thereby making a transparent channel for all kinds of security systems. Two wire application

graduation allows you to talk on a regular phone with the ability to remove it at a considerable distance from the station.

Variants of execution are subdivided according to the set of necessary station blocks and the channel frequency speed (set by a replaceable generator block).

Claims (1)

An access module, including a multiplexing node, an interface channel main node, an Ethernet interface node, an additional channel interface node, an intercom node, a power supply, characterized in that an integrated direct single multiplexing multiplexer, a replaceable generator block and a software change port are introduced, and the nodes the main channel interface, the Ethernet interface, the auxiliary channel interface and the power supply are made in the form of replaceable blocks, and the main channel interface block is made in the form of erfeysa channel 16x E1 or E2 or E3, a service communication unit is made as a two-wire interface closure.