CN206498408U - Network matching device for bus type FC‑AE‑1553 network - Google Patents

Abstract

The utility model relates to a network matching device used in a bus-type FC‑AE‑1553 network, which includes: optical fiber interfaces A and B, a photoelectric conversion module, a data buffer, a handshake module, a forwarding module and a microprocessor. The optical fiber interface is used to receive and receive optical signals; the photoelectric conversion module is used to perform photoelectric and electro-optical conversion of signals; the handshake module, data buffer, and forwarding module are connected in sequence, and the three are connected to the microprocessor respectively; the handshake module is used to convert signals through photoelectricity After receiving the preamble, the module returns a handshake response to the other party; the forwarding module is used to implement signal forwarding; the microprocessor is used to control the signal processing, signal storage and signal transceiver in the data buffer, handshake module and forwarding module; the data buffer is used for storage Preamble, handshake response and forwarding signal. The network matching device designed by this utility model can make the bus type FC‑AE‑1553 network less dependent on space and surrounding environment during layout.

Description

Network matching device used in bus type FC-AE-1553 network

technical field

The utility model relates to the technical field of topology structure of a bus-type FC_AE_1553 network, in particular to a network matching device used in a bus-type FC-AE-1553 network.

Background technique

The FC-AE-1553 bus is an emerging high-reliability, high-speed optical fiber bus. Its protocol is formulated by the American National Standards Institute (ANSI), and defines the mapping from the MIL-STD-1553B protocol to the Fiber Channel (FC) high-level protocol. It provides protocol support for the development of fiber optic 1553 bus controller. Like the traditional 1553B bus, FC-AE-1553 defines a command/response bus standard, but has greatly improved bus capacity, transmission rate, and reliability. At the same time, the FC-AE-1553 bus adopts optical fiber transmission medium and network topology, which has strong anti-interference ability and expansion ability, and is very suitable for electronic system networking and multi-terminal communication of complex spacecraft. In addition, a very important feature of the FC-AE-1553 bus is to support the connection of the existing traditional 1553B bus to the optical fiber 1553 network through bridging, so as to preserve the existing 1553B equipment to the maximum extent, save resources, and realize the smooth upgrade of the traditional 1553B bus . Therefore, FC-AE-1553 bus is the development direction of high-speed and highly reliable data bus in aerospace field.

The current bus-type FC-AE-1553 network based on the passive optical network is suitable for applications where the number of nodes is small, the bus bandwidth is below 10Gbps, and the power consumption is demanding. This kind of network requires the access position of the FC-AE-1553 network bus controller to be located at the front end of the bus, which has certain restrictions on the layout of each node device of the FC-AE-1553 network, and there are limitations in space layout. Therefore, it is necessary to provide a network matching device for the bus-type FC-AE-1553 network, to solve the problem that the access position of the network bus controller must be at the forefront of the bus, and realize the node position of the network control equipment and the network terminal flexible switching.

Utility model content

In view of the above analysis, the utility model aims to provide a network matching device used in the bus type FC-AE-1553 network, to solve the problem that the access position of the network controller must be Located at the forefront of the bus, the relative layout of each node device is limited and it is not easy to expand flexibly.

The purpose of this utility model is mainly achieved by the following technical solutions:

A network matching device used in a bus-type FC-AE-1553 network is provided, including:

Optical fiber interface A, optical fiber interface B, photoelectric conversion module, data buffer, handshake module, forwarding module and microprocessor;

Optical fiber interface A and B are used to receive the optical signal transmitted from the bus type FC-AE-1553 network A or B, and forward the received optical signal to the photoelectric conversion module; it is also used to receive the optical signal sent by the photoelectric conversion module Signal, and send the optical signal to the bus type FC-AE-1553 network A or B;

The photoelectric conversion module is connected to the optical fiber interfaces A and B, and is also connected to the data buffer. The photoelectric conversion module is used to convert the optical signal transmitted from the optical fiber interface A or B into an electrical signal and transmit it to the data buffer; The electrical signal transmitted by the device is converted into an optical signal and transmitted to the optical fiber interface A or B;

The data buffer, the handshake module and the forwarding module are connected in sequence, and the three are respectively connected to the microprocessor;

The handshake module is used to receive the preamble, which is transmitted to the handshake module after passing through the photoelectric conversion module and the data buffer; after the handshake module receives the preamble, it returns a handshake response to the other party to establish a stable connection;

The forwarding module is used to implement signal forwarding, and the forwarding behavior occurs after a stable connection is established, otherwise the IDLE code is sent to the handshake module;

The microprocessor is used to control the signal processing, signal storage and signal sending and receiving in the data buffer, the handshake module and the forwarding module;

The data buffer is connected with the microprocessor, the handshake module and the photoelectric conversion module, and is used for storing the preamble, the handshake response and the forwarding signal.

Among them, the access position of the network matching device is located at the forefront of the bus-type FC-AE-1553 network, and is connected to the network matching node of the bus-type optical fiber network.

The wavelength of the optical signal received by the optical fiber interfaces A and B from the bus type FC-AE-1553 network A or B is λ ₁ ; the wavelength of the optical signal sent to the FC-AE-1553 network A or B is λ ₂ . Optical fiber interfaces A and B are used for dual-way backup.

Preferably, the photoelectric conversion module is a single-fiber bidirectional module.

The beneficial effects of the utility model are as follows:

The network matching device is used to construct the FC-AE-1553 bus network. Compared with the network controller and network terminal, the network matching device is much lower in area, power consumption and complexity, so the network layout is dependent on space and the surrounding environment Smaller, by arranging it at the front end of the FC-AE-1553 bus, the network controller in the bus-type FC-AE-1553 network can be placed anywhere on the bus. In this way, the positions of the network controller and the network terminal can be switched at will, so that the layout mode can be flexibly selected according to different application scenarios.

Other features and advantages of the utility model will be set forth in the following description, and some of them will become obvious from the description, or be understood by implementing the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The drawings are only for the purpose of illustrating specific embodiments, and are not considered to limit the present utility model. Throughout the drawings, the same reference symbols represent the same components.

FIG. 1 is a schematic diagram of a network matching device.

detailed description

The preferred embodiments of the present utility model are specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present utility model to explain the principle of the present utility model.

The utility model provides a network matching device used in a bus-type FC-AE-1553 network. This embodiment takes the FC-AE-1553 network of a dual-channel optical fiber bus as an example for illustration. The access position of the network matching device is located at the forefront of the bus-type FC-AE-1553 network, connected to the network matching node of the bus-type optical fiber network, used for terminal matching of the bus-type optical fiber network, and realizing sequence forwarding, specifically including (Figure 1 ):

An optical fiber interface A, an optical fiber interface B, a photoelectric conversion module, a data buffer, a handshake module, a forwarding module and a microprocessor.

Optical fiber interface A and optical fiber interface B are respectively connected to optical splitters A and B in the bus-type FC-AE-1553 network, and optical splitters A and B correspond to bus-type FC-AE-1553 networks A and B respectively. The optical fiber interface A and B are used to receive the optical signal _of λ1 wavelength transmitted from the bus-type FC-AE-1553 network A or B, and the optical signal is sent by the network controller or For any network terminal, the optical fiber interface can use the burst receiving mode to receive the signal; the optical fiber interface A and B will also forward the received optical signal to the photoelectric conversion module; and receive the optical signal sent by the photoelectric conversion module, and Send the optical signal to the optical splitter A or B corresponding to the bus type FC-AE-1553 network A or B in the form of λ ₂ wavelengths, where the optical signal is sent to the network controller in the FC-AE-1553 network and any The way network terminals simultaneously broadcast and send.

The above optical fiber interface A, optical fiber interface B, optical splitters 1A, 1B and FC-AE-1553 networks A, B are used for dual-way backup. The optical fiber interface A of the optical splitter, the optical splitter 1A and the connected FC-AE-1553 network A form a network path, the optical fiber interface B of the optical splitter, the optical splitter 1B and the connected FC-AE-1553 network B form another network path , set up two sets of network paths, and when there is a fault in one set of paths, another path can be used.

The photoelectric conversion module is connected to the optical fiber interfaces A and B, and connected to the data buffer. The photoelectric conversion module is used to convert the optical signal transmitted from the optical fiber interface A or B into an electrical signal and transmit it to the data buffer; and convert the electrical signal transmitted from the data buffer into an optical signal and transmit it to the optical fiber interface A or B. The photoelectric conversion module is specifically a single-fiber bidirectional module.

The microprocessor is respectively connected to the data buffer, the handshake module and the forwarding module, and is used to control signal processing, signal storage and signal transceiving in the data buffer, the handshake module and the forwarding module.

The data buffer, the handshake module and the forwarding module are connected in sequence, and the three are respectively connected to the microprocessor.

Specifically, after receiving the preamble/request handshake signal sent by the network controller or any network terminal through the data buffer, the handshake module returns a handshake response to the other party to establish a stable connection. The above-mentioned preamble is transmitted through an optical signal with _a wavelength of λ1 and converted into an electrical signal by the photoelectric conversion module, and then received by the handshake module through the data buffer.

The forwarding module is used to implement signal forwarding, specifically to broadcast and forward the signal in real time. The signal received by the forwarding module passes through the data buffer and the handshake module, and the sent signal passes through the handshake module and the data buffer in turn; the data sent and received by the forwarding module is finally converted by the photoelectric conversion module into photoelectricity or electro-optic, and then through the optical fiber interface A/B Send to splitter A or B in the bus type FC-AE-1553 network. The above forwarding behavior occurs after the connection between the handshake module and the terminal is established.

The data buffer is connected to the microprocessor, the handshake module and the forwarding module, and is used for storing the preamble, the handshake response and the forwarding signal, etc.

Since FC-AE-1553 is a time-division deterministic network, the information sent by each node to the network matching device is time-division multiplexed, and no conflict will occur.

The network matching device is designed to receive the sequence in the burst receiving mode and forward the sequence by broadcasting. Specifically, the network matching device has the ability to receive the optical signal _of λ1 wavelength sent by the network controller or any network terminal in burst mode, and the signals that can be received include preamble, FC-AE-1553 command sequence, FC-AE -1553 data sequence, FC-AE-1553 state sequence; the network matching device also has the ability to simultaneously and continuously send optical signals of _λ2 wavelength to the optical network controller or any network terminal in broadcast mode, and the signals that can be sent include FC-AE-1553 command sequence, FC-AE-1553 data sequence, FC-AE-1553 status sequence.

The working mode of the network matching device is: the network matching device receives a preamble sent by a network terminal or network controller, and after establishing a stable connection with the network terminal or network controller, the network terminal or network controller sends the preamble The valid information sent is broadcast to all network terminals or network controllers. The role of the above preamble sequence is to establish a stable optical link communication state between the network node and the network matching device.

In summary, the embodiment of the utility model provides a network matching device used in a bus-type FC-AE-1553 network. The network matching device designed in the utility model can make the bus-type FC-AE-1553 network The layout is less dependent on space and the surrounding environment, allowing the network controller to be placed anywhere on the bus, so that the positions of the network controller and network terminals can be switched at will, and the layout method can be flexibly selected according to different application scenarios .

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model.

Claims (3)

1. A network matching device for bus type FC-AE-1553 network, characterized in that, comprising: Optical fiber interface A, optical fiber interface B, photoelectric conversion module, data buffer, handshake module, forwarding module and microprocessor; One end of the optical fiber interface A, B is optically connected to the optical splitter A or B in the bus type FC-AE-1553 network, and the optical splitter A or B corresponds to the bus type FC-AE-1553 network A, B respectively; The other ends of the optical fiber interfaces A and B are optically connected to the photoelectric conversion module; One end of the photoelectric conversion module is optically connected to the optical fiber interface A or B, and the other end is electrically connected to the data buffer; the photoelectric conversion module is a single-fiber bidirectional module; The data buffer, the handshake module and the forwarding module are connected in sequence, and the three are respectively connected to the microprocessor; The data buffer is connected to the microprocessor, the handshake module and the photoelectric conversion module; The access position of the network matching device is located at the forefront of the bus-type FC-AE-1553 network, and is connected to the network matching node of the bus-type optical fiber network. 2. The network matching device according to claim 1, characterized in that, the wavelength of the optical signal received by the optical fiber interface A and B from the bus type FC-AE-1553 network A or B is λ ₁ ; it is sent to FC- The wavelength of the optical signal of AE-1553 network A or B is λ ₂ . 3. The network matching device according to claim 1, wherein the optical fiber interfaces A and B are used for dual-way backup.