Multi-interface fusion optical fiber data transmission system

Abstract

The invention provides a multi-interface fusion optical fiber data transmission system, and relates to the technical field of aviation communication, the system comprises a main node and a sub-node, and the main node and the sub-node carry out data transmission through an optical fiber; the main node comprises an upper computer, and the child node comprises an optical module and an interface conversion module; the optical module and the interface conversion module carry out data communication through an optical fiber bus; the interface conversion module comprises an optical fiber unit, a communication configuration unit and a bus transceiving unit; photoelectric and electro-optical signal conversion of communication data is completed through the optical fiber unit; the communication configuration unit receives communication data and performs data communication with the optical fiber module according to a preset interface conversion protocol; and the bus transceiving unit is used for receiving bus data of the plurality of bus interfaces and carrying out data communication with the communication configuration unit. According to the invention, the data transmitted by the interfaces with different rates are fused and then transmitted through the optical fiber bus, so that the data transmission efficiency is improved, and the transmission rate between devices is also improved.

Description

Technical Field

[0001] The present invention relates to the field of aviation system communication technology, and in particular to a multi-interface integrated optical fiber data transmission system. Background Art

[0002] With the continuous development of information transmission technology, the total amount of equipment data in the aviation system is increasing, and the transmission rate requirements are getting higher and higher. Therefore, the efficiency of information transmission of aviation equipment systems has become a research focus. Optical fiber data bus has gradually been widely used in various fields due to its large capacity, anti-interference, high speed and long-distance transmission characteristics. It is of great significance to improve the reliability and real-time performance of data transmission in the system.

[0003] At present, aviation equipment systems mostly use Ethernet, LVDS, CAN bus, UART bus and other buses to realize various data transmission within the equipment system. These interfaces are mostly used separately, or through a single machine to perform interface conversion. This method seriously affects the efficiency and real-time performance of data transmission between aviation equipment systems. Therefore, integrating various interfaces before data transmission can greatly improve the efficiency and real-time performance of data transmission in the system, and is also of great significance to simplifying the system structure. Summary of the invention

[0004] The present invention provides a multi-interface integrated optical fiber data transmission system to solve the defects of the prior art. By constructing a conversion protocol between an optical fiber bus and various electrical interfaces, optical fiber data transmission integrating multiple electrical interfaces is realized, thereby effectively improving the efficiency and real-time performance of data transmission between aviation equipment systems.

[0005] In a first aspect, the present invention provides a multi-interface fused optical fiber data transmission system, characterized in that it comprises: a master node and a sub-node, wherein optical fiber is used for data transmission between the master node and the sub-node; the master node comprises a host computer, and the sub-node comprises an optical module and an interface conversion module;

[0006] The optical module and the interface conversion module perform data communication via an optical fiber bus; the interface conversion module comprises an optical fiber unit, a communication configuration unit and a bus transceiver unit;

[0007] The optical fiber unit is used to complete the optical-electrical and electro-optical signal conversion of communication data;

[0008] The communication configuration unit is used to receive communication data and perform data communication with the optical fiber module according to a preset interface conversion protocol;

[0009] The bus transceiver unit is interconnected with the communication configuration unit, and is used to receive bus data from multiple bus interfaces, generate communication data to communicate with the communication configuration unit, and receive communication data sent by the communication configuration unit to communicate data through the bus interface.

[0010] According to the multi-interface integrated optical fiber data transmission system, the preset interface conversion protocol includes: configuring the time interval of the transmission time of the communication data according to the preset interface conversion protocol instruction chain list.

[0011] According to the multi-interface integrated optical fiber data transmission system, the time interval is configured in a data repetition cycle manner, and the cycle includes multiple sub-cycles, and the sub-cycle includes the sending and receiving timing intervals of communication data of different bus interfaces and the time intervals between sub-cycles.

[0012] According to the multi-interface integrated optical fiber data transmission system, the sub-cycle acquisition step includes: inserting a corresponding long time delay according to the transmission rate of the communication data of different bus interfaces, and the long time delay is the timing interval of the communication data of different bus interfaces and / or the time interval between cycles.

[0013] According to the multi-interface fused optical fiber data transmission system, the bus transceiver unit comprises: a first bus sending subunit, a second bus sending subunit, a first bus receiving subunit and a second bus receiving subunit;

[0014] The first bus sending subunit is used to receive bus data of the first transmission rate bus interface, generate first communication data and send it to the communication configuration module,

[0015] An encoding module is configured between the second bus sending subunit and the communication configuration unit, and the encoding module is used to receive the bus data of the second transmission rate bus interface sent by the second bus sending subunit, encode it, generate second communication data and send it to the communication configuration module;

[0016] A first bus receiving subunit, used for receiving communication data from the communication configuration unit and forwarding it to a first transmission rate bus interface;

[0017] The second bus receiving subunit is used to receive the communication data from the communication configuration unit and forward it to the second transmission rate bus interface.

[0018] According to the multi-interface integrated optical fiber data transmission system, based on the APSOC architecture, the interface conversion module is implemented by the IP core in the FPGA.

[0019] According to the multi-interface integrated optical fiber data transmission system, the communication configuration unit adopts a GTX transceiver.

[0020] According to the multi-interface integrated optical fiber data transmission system, the bus data includes Ethernet bus, LVDS bus, CAN bus and UART bus.

[0021] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0022] The present invention provides a multi-interface fused optical fiber data transmission system, including a master node and a sub-node, wherein optical fiber is used for data transmission between the master node and the sub-node; the master node includes a host computer, and the sub-node includes an optical module and an interface conversion module; the optical module and the interface conversion module communicate data through an optical fiber bus; the interface conversion module includes an optical fiber unit, a communication configuration unit and a bus transceiver unit; the optical fiber unit is used to complete the photoelectric and electro-optical signal conversion of communication data; the communication configuration unit receives the communication data and communicates data with the optical fiber module according to the preset interface conversion protocol; the bus transceiver unit receives the bus data of multiple bus interfaces and communicates data with the communication configuration unit. The present invention not only improves the data transmission efficiency, but also improves the transmission rate between devices by fusing the data transmitted by interfaces of different rates and transmitting them through the optical fiber bus. At the same time, the data transmission of different interfaces is further sorted through timing management measures, so that the data of various interfaces are transmitted in an orderly manner on the optical fiber bus, so that the fault tolerance of the optical fiber bus transmission is improved, and the effective transmission of the system in an electromagnetic interference environment is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural schematic diagram of a multi-interface integrated optical fiber data transmission system provided by the present invention;

[0025] Figure 2 It is a structural schematic diagram of the timing interval allocation of the system provided by the present invention;

[0026] Figure 3 It is a schematic diagram of the logical relationship between various interfaces and communication configuration units provided by the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in the description of the embodiments of the present invention, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0030] Combine the following Figure 1-Figure 3 The present invention describes a multi-interface integrated optical fiber data transmission system.

[0031] Figure 1 FIG. 1 is a schematic diagram of the structure of the optical fiber data transmission system with multiple interfaces provided by the present invention. Figure 1 As shown, it includes: a main node and a sub-node, and optical fiber is used for data transmission between the main node and the sub-node; the main node includes a host computer, and the sub-node includes an optical module and an interface conversion module;

[0032] The optical module and the interface conversion module perform data communication via an optical fiber bus; the interface conversion module comprises an optical fiber unit, a communication configuration unit and a bus transceiver unit;

[0033] The optical fiber unit is used to complete the optical-electrical and electro-optical signal conversion of communication data;

[0034] The communication configuration unit is used to receive communication data and perform data communication with the optical fiber module according to a preset interface conversion protocol;

[0035] The bus transceiver unit is interconnected with the communication configuration unit, and is used to receive bus data from multiple bus interfaces, generate communication data to communicate with the communication configuration unit, and receive communication data sent by the communication configuration unit to communicate data through the bus interface.

[0036] In a preferred embodiment, an APSOC-based FPGA device is used as a hardware platform to construct a fiber-optic data bus. Various interfaces on the fiber-optic data bus are implemented through IP cores in the FPGA, and the interfaces include, for example, Ethernet interfaces, LVDS interfaces, CAN bus interfaces, and UART interfaces. By constructing a conversion protocol between the fiber-optic bus and various electrical interfaces, fiber-optic data transmission with multiple electrical interfaces integrated is realized.

[0037] The optical fiber data bus includes a master node and N sub-nodes. The master node and the sub-nodes are connected through optical fibers. The master node is mounted on the host computer system through the internal bus, and sends the data obtained by each sub-node to the host computer system for processing, and sends the host computer's instructions and other data to the corresponding sub-node. The master node is equivalent to the data management unit of the optical fiber bus, processing various data transmitted by each sub-node through optical fibers and sending corresponding control instructions and other information to each sub-node.

[0038] In this embodiment, the sub-node mainly includes an optical module and an interface conversion module.

[0039] The optical module and the interface conversion module perform data communication via an optical fiber bus.

[0040] Among them, the interface conversion module includes an optical fiber unit, a communication configuration unit and a bus transceiver unit;

[0041] Optical fiber unit, used to complete the optical-electrical and electro-optical signal conversion of communication data;

[0042] A communication configuration unit, used to receive communication data and perform data communication with the optical fiber module according to a preset interface conversion protocol;

[0043] The bus transceiver unit is interconnected with the communication configuration unit, and is used to receive bus data from multiple bus interfaces, generate communication data to communicate with the communication configuration unit, and receive communication data sent by the communication configuration unit to communicate data through the bus interface.

[0044] Bus data includes, for example, Ethernet bus, LVDS bus, CAN bus and UART bus. The sub-node needs to integrate these bus interfaces with different transmission rates and transmit them through the optical fiber bus. By formulating a preset interface conversion protocol, the compatibility of each bus interface protocol is guaranteed.

[0045] In a preferred embodiment, the preset interface conversion protocol includes: configuring the transmission time of the communication data at a time interval according to the preset interface conversion protocol instruction chain list.

[0046] The fiber optic bus protocol on the master node uses a static transmission protocol to perform multi-point control. The electrical interface data in each sub-node is transmitted as an optical signal according to the allocation of the interface conversion protocol instruction list. The timing intervals in the conversion protocol instruction list are configured by the host computer to each sub-node through the master node.

[0047] For example, the data flow density of Ethernet bus data and LVDS bus data is relatively fixed during the entire time period of the optical fiber bus, so a fixed timing interval is allocated to different interface data in each timing interval.

[0048] In a preferred embodiment, the time interval is configured in a data repetition cycle manner, and the cycle includes multiple sub-cycles, and the sub-cycle includes the sending and receiving timing intervals of communication data of different bus interfaces and the time intervals between the sub-cycles.

[0049] The step of acquiring the sub-cycle includes: inserting a corresponding long time delay according to the transmission rate of the communication data of different bus interfaces, wherein the long time delay is the timing interval of the communication data of different bus interfaces and / or the time interval between cycles.

[0050] In this embodiment, the allocation of timing intervals is reflected in the data repetition cycle. Each sub-node is a sub-cycle, which includes all interface data transmission and reception timing intervals and the time intervals between the entire sub-cycles. One cycle contains N sub-cycles, and the cycle is managed on the main node.

[0051] Based on the contents of the above embodiments, the bus transceiver unit in the optical fiber data transmission system with multi-interface fusion provided by the present invention comprises: a first bus sending subunit, a second bus sending subunit, a first bus receiving subunit and a second bus receiving subunit;

[0052] The first bus sending subunit is used to receive bus data of the first transmission rate bus interface, generate first communication data and send it to the communication configuration module,

[0053] An encoding module is configured between the second bus sending subunit and the communication configuration unit, and the encoding module is used to receive the bus data of the second transmission rate bus interface sent by the second bus sending subunit, encode it, generate second communication data and send it to the communication configuration module;

[0054] A first bus receiving subunit, used for receiving communication data from the communication configuration unit and forwarding it to a first transmission rate bus interface;

[0055] The second bus receiving subunit is used for receiving the communication data from the communication configuration unit and forwarding it to the second transmission rate bus interface.

[0056] Among them, the first transmission rate bus interface is a bus interface that converts a large amount of data to the optical fiber bus per unit time. For example, the Ethernet bus and the LVDS bus are high-speed interfaces, and the amount of data converted to the optical fiber bus per unit time is large. Therefore, the transmission time of Ethernet data and LVDS data on the optical fiber bus is long, and the transmission time is usually in microseconds.

[0057] The first transmission rate bus interface is a bus interface that converts a small amount of data to the optical fiber bus per unit time. For example, the CAN interface and the UART interface are low-speed interfaces, and the amount of data converted to the optical fiber bus per unit time is small. The transmission time of CAN bus data and UART bus data on the optical fiber bus is short, and the transmission time is usually in nanoseconds.

[0058] Therefore, in order to adapt to the microsecond data transmission time of the high-speed interface on the optical fiber bus, an encoding module is configured between the second bus sending subunit and the communication configuration unit.

[0059] The bus data of the second transmission rate bus interface sent by the second bus sending subunit is received by the encoding module and encoded to generate second communication data and send it to the communication configuration module; the data on the low-speed interface, such as CAN bus data and UART bus data, are re-encoded and packaged together in the optical fiber bus and then transmitted as optical signals, and at the same time, decoded at the receiving end by the decoder in the second bus receiving subunit.

[0060] In a preferred embodiment, Figure 2 The schematic diagram of timing interval allocation for a multi-interface integrated optical fiber data transmission system is shown in FIG. Figure 2 As shown in the figure, each sub-cycle corresponds to a sub-node, and the total time of each sub-cycle is 16μs. Each sub-node exchanges data of each bus interface in the node with the optical fiber bus within the sub-cycle time allocated by the timing interval. After a cycle of data exchange, it can be guaranteed that all sub-nodes in the optical fiber bus network have completed data exchange with the main node.

[0061] Since data conversion is required between the optical fiber bus and the electrical bus interface on each sub-node, the communication configuration unit, for example, adds GTX high-speed data bus conversion on the FPGA device platform with APSOC architecture, builds the IP core of the GTX transceiver, and is used to receive communication data and perform high-speed transmission of optical fiber data with the optical fiber module. Figure 3 A schematic diagram of the logical relationship between the four interfaces provided in this embodiment and the GTX transceiver.

[0062] like Figure 3As shown, the bus data of the first transmission rate bus interface, for example, the Ethernet bus interface is a high-speed interface. First, the IP core of the Ethernet controller is built in the FPGA to receive Ethernet data from the external interface. The Ethernet data is bidirectional data. The Ethernet data is transmitted to the processor through the APSOC internal AXI bus to parse the data, and then a data format that can be sent and received by the GTX transceiver is generated. An interface for data exchange with the GTX transceiver IP core is added to the IP core of the Ethernet controller, and finally converted into an optical signal through the GTX transceiver and transmitted to the optical fiber bus for data transmission.

[0063] Similarly, the data conversion of the LVDS bus interface is similar to that of the Ethernet bus interface. First, an IP core of the LVDS interface is built in the FPGA to receive LVDS data from the external interface. The LVDS data is bidirectional data. The LVDS data is transmitted to the processor through the APSOC internal AXI bus for data parsing. Then, a data format that can be sent and received by the GTX transceiver is generated. An interface for data exchange with the GTX transceiver IP core is added to the LVDS interface IP core. Finally, the GTX transceiver converts the data into an optical signal and transmits it to the optical fiber bus for data transmission.

[0064] The bus data of the second transmission rate bus interface is, for example, a CAN bus interface and a UART bus interface, both of which are low-speed interfaces. In the FPGA, the bus data from the external interface can also be received by constructing a CAN IP core and a UART IP core, and an interface for data exchange with the GTX transceiver IP core is added to the CAN IP core and the UART IP core. After the data passes through the CAN bus transceiver module and the UART bus transceiver module, the two types of data are re-encoded after being parsed by the processor, and the encoded data chain is converted into an optical signal by the GTX transceiver and transmitted to the optical fiber bus for data transmission. The same principle applies to receiving data. The data of the GTX transceiver is first decoded by a decoder and then passed to the respective transceiver modules.

[0065] In summary, the optical fiber data transmission system with multiple interfaces provided by the present invention has the following advantages over the prior art:

[0066] a) The data transmitted by interfaces with different rates are integrated and transmitted through the optical fiber bus, which not only improves the data transmission efficiency, but also increases the transmission rate between devices.

[0067] b) Through timing management measures, the data transmission of different interfaces is sorted, so that the data of various interfaces are transmitted in an orderly manner on the optical fiber bus, which improves the fault tolerance of the optical fiber bus transmission and effectively improves the effective transmission of the system in an electromagnetic interference environment.

[0068] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0069] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-interface integrated optical fiber data transmission system, characterized in that: include: A master node and a sub-node, wherein optical fiber is used for data transmission between the master node and the sub-node; the master node includes a host computer, and the sub-node includes an optical module and an interface conversion module; The optical module and the interface conversion module perform data communication via an optical fiber bus; The interface conversion module includes an optical fiber unit, a communication configuration unit and a bus transceiver unit; The optical fiber unit is used to complete the photoelectric and electro-optical signal conversion of communication data; The communication configuration unit is used to receive communication data and perform data communication with the optical fiber module according to a preset interface conversion protocol; The bus transceiver unit is interconnected with the communication configuration unit, and is used to receive bus data from multiple bus interfaces, generate communication data to communicate with the communication configuration unit, and receive communication data sent by the communication configuration unit to communicate data through the bus interface.

2. The multi-interface integrated optical fiber data transmission system according to claim 1, characterized in that: The preset interface conversion protocol includes: configuring the transmission time of the communication data at a time interval according to a preset interface conversion protocol instruction chain list.

3. The multi-interface integrated optical fiber data transmission system according to claim 2, characterized in that: The time interval is configured in a data repetition cycle manner, and the cycle includes a plurality of sub-cycles, and the sub-cycles include the timing intervals for sending and receiving communication data of different bus interfaces and the time intervals between the sub-cycles.

4. The multi-interface integrated optical fiber data transmission system according to claim 3, characterized in that: The sub-cycle acquisition step includes: inserting a corresponding long time delay according to the transmission rate of the communication data of different bus interfaces, and the long time delay is the timing interval of the communication data of different bus interfaces and / or the time interval between cycles.

5. The multi-interface integrated optical fiber data transmission system according to claim 1, characterized in that: The bus transceiver unit comprises: a first bus sending subunit, a second bus sending subunit, a first bus receiving subunit and a second bus receiving subunit; The first bus sending subunit is used to receive bus data of the first transmission rate bus interface, generate first communication data and send it to the communication configuration module, An encoding module is configured between the second bus sending subunit and the communication configuration unit, and the encoding module is used to receive the bus data of the second transmission rate bus interface sent by the second bus sending subunit, encode it, generate second communication data and send it to the communication configuration module; A first bus receiving subunit, used for receiving communication data from the communication configuration unit and forwarding it to a first transmission rate bus interface; The second bus receiving subunit is used to receive the communication data from the communication configuration unit and forward it to the second transmission rate bus interface.

6. The multi-interface integrated optical fiber data transmission system according to claim 1, characterized in that: Based on the APSOC architecture, the interface conversion module is implemented through the IP core in the FPGA.

7. The multi-interface integrated optical fiber data transmission system according to claim 1, characterized in that: The communication configuration unit adopts a GTX transceiver.

8. The multi-interface integrated optical fiber data transmission system according to claim 1, characterized in that: The bus data includes Ethernet bus, LVDS bus, CAN bus and UART bus.

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