CN213754536U - System for adapting bus type network and exchange type network - Google Patents

Abstract

The utility model belongs to the fiber bus field discloses a system of adaptation bus type network and switching type network, in this system: the FPGA is provided with an application layer, a drive layer and a middleware arranged between the application layer and the drive layer, the application layer is in communication connection with the physical layer through the middleware, and the FLSH flash memory is used for storing a communication configuration table; the middleware comprises a network environment detection module, a frame data legality detection module and a port access control module, wherein the network environment detection module is respectively connected with FLASH FLASH memory data through the frame data legality detection module and the port access control module, and is used for judging whether the current network environment is a bus network or an exchange network; the data receiving port is connected with the FPGA through the first transceiver, the data transmitting port is connected with the FPGA through the second transceiver, the PCIE data receiving and transmitting end of the FPGA is connected with the PCIE receiving and transmitting end of the PCIE golden finger, the timer is connected with the FPGA, and the clock end of the FPGA is connected with the clock end of the PCIE golden finger.

Description

System for adapting bus type network and exchange type network

Technical Field

The utility model relates to an optical fiber bus field, concretely relates to system of adaptation bus type network and exchange type network.

Background

Bus technology in the aviation and aerospace fields is developing towards higher reliability, high bandwidth and high real-time performance, and the optical fiber channel can well meet the interconnection requirement of future avionic systems due to the characteristics of high speed, low delay, open standards and the like, so that the optical fiber channel becomes the preferred standard of interconnection of the future avionic systems. The wide use of the FC-AE network also makes people pay further attention to the reliability research, and the FC-AE network is efficiently utilized to analyze the universality research of a network platform, which is the focus of the research on the FC-AE network.

The topology structure between the fiber channel communication ports is divided into two basic types of sharing and switching: point-to-point, arbitrated loop, switched type architecture. The point-to-point network topology can only realize single-to-single communication and cannot form a network. The arbitrated loop topology can only have one device performing an I/O operation at a time. Because the devices on each ring must queue for the processing of I/O requests, the rate of data transfer in the network topology can become very low, and adding and removing devices can result in a reset of the ring, which can result in an instantaneous interruption of the ring traffic. The FC-AE-1553 bus type network topology structure not only has good network performance of an optical fiber channel, but also has the traditional advantages of the MIL-STD-1553B, and can also be seamlessly compatible with MIL-STD-1553 bus system equipment.

However, the FC-AE-1553 bus network can only be used for a small network, and when the network increases the number of nodes and the throughput, the data transmission of the bus network has delay. The switching structure linearly increases the throughput of the system by increasing the number of linked ports, can greatly expand the number of nodes on the network without reducing the bandwidth of each port, and is the most functionally advantageous topology in the FC topology.

The bus type network has no switch, and the wiring is relatively simpler. In the switching network, each node is a passive waiting switch for receiving and sending messages according to a preset port ID, the FC-AE bus type network uses optical fibers instead of cables for link connection, and the MIL-STD-1553B can not be directly mounted on a bus. Therefore, the bus network to the exchange type network structure not only adds the switches, the configuration of the switches, the transparent transmission function of the communication equipment, the port ID identification function and the multicast pool configuration can be modified. When each communication device receives different network structures, an application layer, a transmission layer and a network layer in the corresponding network model all involve modification, so that the labor cost is increased, the utilization efficiency is low, the network structure can not be adapted, and only a single network structure can be used.

Therefore, the problem of network universality needs to be solved, and the application of adapting to different network structures is realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that a system of adaptation bus type network and exchange type network is provided, on the basis of using current software application, realize the commonality adaptation of bus type network and exchange type network.

The utility model provides a its technical problem, the technical scheme of adoption is:

the system for adapting the bus network and the exchange network comprises an optical fiber board card body, wherein the optical fiber board card body is also provided with an FPGA (field programmable gate array), an FLSH (flash memory), a timer, a data receiving port, a data sending port, a first transceiver, a second transceiver and a PCIE (peripheral component interface express) golden finger;

the FPGA is provided with an application layer, a drive layer and a middleware arranged between the application layer and the drive layer, the application layer is in communication connection with a physical layer through the middleware, and the FLSH flash memory is used for storing a communication configuration table;

the middleware comprises a network environment detection module, a frame data legality detection module and a port access control module, wherein the network environment detection module is respectively connected with the frame data legality detection module and the port access control module, the frame data legality detection module and the port access control module are both in data connection with the FLASH memory, and the network environment detection module is used for judging whether the current network environment is a bus network or an exchange network;

the data receiving port is connected with the FPGA through the first transceiver, the data transmitting port is connected with the FPGA through the second transceiver, the PCIE data receiving and transmitting end of the FPGA is connected with the PCIE receiving and transmitting end of the PCIE golden finger, the timer is connected with the FPGA, and the clock end of the FPGA is connected with the clock end of the PCIE golden finger.

Further, the system further comprises a DDR, and the DDR is connected with the FPGA.

Further, the DDR is DDR 3.

Further, the model of the FPGA is XC7K 325T.

Further, the PCIE gold finger is a 4-speed PCIE interface.

Further, the system further comprises a mobile power supply, and the mobile power supply is connected with a power supply end of the PCIE golden finger.

Further, the operating voltage of the mobile power supply is 12V.

Further, the first transceiver and the second transceiver are both fc gateways.

The utility model has the advantages that through the system of the above-mentioned adaptation bus type network and the exchange type network, on the basis of using the existing software application, through storing a communication configuration table in FLASH, and judge the current network environment through the network environment detection module of middleware, if for the bus type network, because only can have a node to send the message on the bus at the same time, so, the port access control module can lead in the communication configuration table, and is responsible for managing whether the port of each node can send the message; if the network is a switched network, because data transmission is too fast and the data may be abnormal when the switched network is used, the frame data legality detection module checks the data, and if the data is abnormal, the data is returned to the source port of the message and the message is retransmitted by the source port, so that the integrity of the data is ensured.

Here, the same communication configuration table can be used in both the bus type network and the switching type network, and the communication configuration table does not need to be modified after being configured once. In the bus network, the middleware simulates the configuration relation of each node in the exchange network according to the communication configuration table, and in the exchange network, the middleware only makes a reliability judgment after passing through the exchange, so that a user does not need to care about the network environment in which the current optical fiber board is positioned, and the difference between the two is blurred by the middleware. Moreover, because the middleware is added, communication equipment which correspondingly identifies the network topology structure is not concerned any more, and adaptation is carried out through the middleware, so that the method can adapt to various network structures. And, through the utility model discloses, can make and build the network environment mode more nimble, can build suitable network environment according to current actual need.

Drawings

Fig. 1 is a block diagram showing an overall configuration of a system of an adaptive bus type network and a switching type network according to the present invention.

Wherein, CLK is a clock signal and PCIE is PCIE data.

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and embodiments.

The utility model provides a system of adapter bus type network and exchange type network, its overall structure block diagram is seen in figure 1, wherein, this system includes the optic fibre integrated circuit board body, wherein, can also be provided with FPGA, FLSH flash memory, time-recorder, data receiving port, data transmission port, transceiver one, transceiver two and PCIE golden finger etc. on the optic fibre integrated circuit board body.

The FPGA is provided with an application layer, a drive layer and a middleware arranged between the application layer and the drive layer, the application layer is in communication connection with the physical layer through the middleware, and the FLSH flash memory is used for storing a communication configuration table;

the middleware comprises a network environment detection module, a frame data legality detection module and a port access control module, wherein the network environment detection module is respectively connected with the frame data legality detection module and the port access control module, the frame data legality detection module and the port access control module are both in data connection with the FLASH FLASH memory, and the network environment detection module is used for judging whether the current network environment is a bus network or an exchange network;

the data receiving port is connected with the FPGA through the first transceiver, the data sending port is connected with the FPGA through the second transceiver, and a PCIE data receiving and sending end of the FPGA is connected with a PCIE receiving and sending end of the PCIE golden finger and used for transmitting PCIE data; the timer is connected with the FPGA, and a clock end of the FPGA is connected with a clock end of the PCIE golden finger and used for keeping the clock signal CLK synchronous.

It should be noted that, after the system of the present invention is provided, the current corresponding application software is needed to be supplemented to implement the universal adaptation between the bus type network and the switching type network.

In the utility model, the optical fiber analog signal is received through the data sending port and the data receiving port, and the analog signal is converted into the serial signal which can be identified and sent by the PFGA through the transceiver I and the transceiver II respectively, the FPGA judges the current network environment according to the identified serial signal, if the network is a bus type network, because only one node can send the message on the bus at the same time, the port access control module can lead in the communication configuration table and is responsible for managing whether the port of each node can send the message or not; if the network is a switched network, because data transmission is too fast and the data may be abnormal when the switched network is used, the frame data legality detection module checks the data, and if the data is abnormal, the data is returned to the source port of the message and the message is retransmitted by the source port, so that the integrity of the data is ensured.

Here, FPGA judges to the network environment and accomplishes the back, can inform the host computer through the PCIE golden finger, handles the backlog item of application layer through the host computer, and the processing procedure of host computer all is prior art, the utility model discloses no longer detail.

It should be noted that the system may further include a DDR, the DDR is connected to the FPGA, and the preferred DDR may be DDR3, where data in the FPGA may be stored by the DDR, so that archiving and calling are facilitated; the model of the FPGA can be XC7K325T so as to configure and use the middleware; when the FPGA informs the upper computer of processing the to-be-processed items of the application layer, in order to improve the transmission efficiency, the PCIE golden finger can be a 4-speed PCIE interface; both the first transceiver and the second transceiver in the system can be fc gateways.

In addition, in order to ensure continuous work of the system and stable work of the system, the system can further comprise a mobile power supply, the mobile power supply is connected with a power supply end of the PCIE golden finger, and in order to adapt to normal work of the FPGA, the working voltage of the mobile power supply can be 12V.

The utility model discloses in, the application software that mentions can be the firmware etc. of implanting in network environment detection module, the legal detection module of frame data and the port access control module, because all firmware that relate to all are current comparatively ripe prior art, therefore the utility model discloses all do not detail again.

Examples

In this embodiment, based on the above mentioned system for adapting to the bus network and the exchange network, a scenario may be set, a low-cost network environment is built by a certain company in an early stage, if the exchange network is adopted, a high-volume switch needs to be purchased, and the bus network is ideal, but the company plans to use the exchange network environment with the increase of complexity of network utilization requirements later, and needs to use the exchange network environment later without the need of reconfiguring the network with a large number of charges. By adopting the design, the translation between event networks can be realized only by changing the wiring mode of the nodes. Conversely, if some nodes originally under the complex network are to be replaced to form a bus-type network independently, the mode of bus connection is only needed to be changed, and the network configuration can form a device group (broadcast domain) under the bus without any modification.

Claims (8)

1. The system for adapting the bus network and the exchange network comprises an optical fiber board card body and is characterized in that the optical fiber board card body is also provided with an FPGA (field programmable gate array), an FLSH (flash memory), a timer, a data receiving port, a data sending port, a first transceiver, a second transceiver and a PCIE (peripheral component interface express) golden finger;

the FPGA is provided with an application layer, a drive layer and a middleware arranged between the application layer and the drive layer, the application layer is in communication connection with a physical layer through the middleware, and the FLSH flash memory is used for storing a communication configuration table;

the middleware comprises a network environment detection module, a frame data legality detection module and a port access control module, wherein the network environment detection module is respectively connected with the frame data legality detection module and the port access control module, the frame data legality detection module and the port access control module are both in data connection with the FLASH memory, and the network environment detection module is used for judging whether the current network environment is a bus network or an exchange network;

the data receiving port is connected with the FPGA through the first transceiver, the data transmitting port is connected with the FPGA through the second transceiver, the PCIE data receiving and transmitting end of the FPGA is connected with the PCIE receiving and transmitting end of the PCIE golden finger, the timer is connected with the FPGA, and the clock end of the FPGA is connected with the clock end of the PCIE golden finger.

2. The system adapting a bussed and switched network according to claim 1, further comprising a DDR, said DDR being connected to an FPGA.

3. The system adapting a bussed network and a switched network according to claim 2, wherein said DDR is DDR 3.

4. A system of adapting a bussed and switched network as claimed in claim 1, wherein said FPGA is of type XC7K 325T.

5. The system for adapting a bussed network and a switched network according to claim 1, wherein said PCIE golden finger is a 4-speed PCIE interface.

6. The system of adapting a bussed and switched network according to claim 1 or 5, further comprising a mobile power supply connected to the power supply terminals of PCIE golden fingers.

7. System for adapting a bus-type network and a switched-type network according to claim 6, characterized in that the operating voltage of the mobile power supply is 12V.

8. A system for adapting a bussed network and a switched network according to claim 1, characterised in that said first transceiver and said second transceiver are both fc gateways.

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