CN112821952A - Data subscription and distribution method based on FC network - Google Patents
Data subscription and distribution method based on FC network Download PDFInfo
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- CN112821952A CN112821952A CN202011427346.1A CN202011427346A CN112821952A CN 112821952 A CN112821952 A CN 112821952A CN 202011427346 A CN202011427346 A CN 202011427346A CN 112821952 A CN112821952 A CN 112821952A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/272—Star-type networks or tree-type networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/16—Multipoint routing
Abstract
The invention discloses a data subscription and distribution method based on an FC network, which is used for solving the communication problem of a complex system. The invention utilizes the protocol transmission characteristic of a real-time deterministic network (FC-AE) to statically construct a minimum-scale bottom layer physical network topology, data topics transmitted between two terminal nodes share a bottom layer MsgID, and a broadcast message is adopted for dynamic discovery to establish a mapping relation between the topics and the bottom layer MsgID. And determining the position information of the terminal through the mapping relation between the DDS data theme packet and the physical MsgID, and realizing the message matching of a Data Distribution Service (DDS) end. The invention reduces the constraint limit of the deterministic network, and simultaneously keeps the flexibility of Data Distribution Service (DDS); as long as the physical architecture of the system is determined, the FC network communication of the bottom layer is fixed for the whole system, and the complexity of the stratum communication network is reduced.
Description
Technical Field
The invention relates to a data communication technology based on an FC network, in particular to a data subscription and distribution method based on the FC network.
Background
The fiber network FC has the characteristics of high bandwidth, low delay and high reliability, and is very suitable for being widely used in a distributed real-time system with higher requirements on data transmission real-time performance.
In a typical FC network system construction, an FC network is a star-shaped switching network structure, multiple FC messages are configured between terminals in a static configuration manner, with the increase of system complexity, a large amount of data needs to be sent between system terminals, multiple FC messages need to be planned according to different data attributes, and a communication network is complex and has poor flexibility.
Disclosure of Invention
The purpose of the invention is as follows: the method aims to solve the problems that a communication network of a complex system is complex and the flexibility of message configuration is poor. The invention provides a data subscription and distribution technology based on an FC network, which adopts a static network dynamic configuration mode, solves the problems of complex communication network and poor flexibility, simplifies the network structure and improves the flexibility of data transmission.
The technical scheme of the invention is as follows:
a data subscription and distribution method based on FC network, the system is based on FC network, data distribution service DDS is adopted to realize data subscription and distribution, the data transmission process comprises bottom FC network construction, Topic Topic subscription, Topic-MsgID corresponding relation mapping and Topic distribution. And when the Topic is subscribed, the DDS software sends an FC broadcast message to inform other network terminals of subscribing the Topic, and the DDS software of other network terminals establishes a Topic-MsgID mapping relation after receiving the Topic subscription message. And when the terminal distributes the Topic, sending the FC message corresponding to the MsgID according to the established Topic-MsgID mapping relation. The transmission of the data is completed through the Topic subscription, the Topic-MsgID mapping and the Topic distribution. The method comprises the following specific steps:
1. underlying network topology construction
And when the system is initialized, a minimum-scale bottom layer physical network topology is established, each terminal plans an FC unicast message with another terminal, plans an FC broadcast message, establishes a communication table, and all themes sent to the other network terminal by each network terminal share one bottom layer MsgID. The transmission and the reception are in the same physical topology, the physical layer has only one topology structure, the communication table comprises a transmission table and a reception table, and the transmission table and the reception table comprise message source addresses and message destination addresses.
2. Topic subscription
The receiving terminal carries out theme subscription through DDS software, and the DDS software sends corresponding FC broadcast messages according to the constructed underlying network topology and carries out theme subscription on other terminals;
Topic-MsgID mapping
The FC broadcast message is adopted to realize dynamic discovery, when a receiving terminal needs to subscribe to the TopicX, the receiving terminal sends the FC broadcast message through DDS software to perform TopicX subscription, and after other terminals receive the FC broadcast message, the DDS software establishes a mapping relation of Topic-MsgID according to a communication table;
4. data transmission
Sending terminal application software carries out Topic distribution through DDS software, and the DDS software sends an FC unicast message corresponding to the MsgID according to the Topic-MsgID mapping relation established in the step 3 to finish data sending;
5. data reception
And the DDS software of the receiving terminal analyzes the received FC unicast message and submits the received topic to a corresponding buffer area according to the subscription relation to complete data reception.
The invention has the beneficial effects that: the FC communication network adopts a static configuration mode to configure a plurality of FC messages between a terminal and a terminal for message receiving and sending, with the increase of the complexity of a system, a large amount of data needs to be sent between the terminal and the terminal, and a plurality of FC messages need to be configured according to different data attributes, so that the communication network is complex and has poor flexibility. In order to solve the problems, the invention provides a data subscription and distribution technology based on an FC network, adopts a static network dynamic configuration mode, solves the problems of complex communication network and poor flexibility, simplifies the network structure and improves the flexibility of data transmission.
Drawings
Fig. 1 is a data transmission topology diagram.
Fig. 2 is a data reception topology.
Fig. 3 data subscription and distribution flow.
Detailed Description
In order to simplify a communication network and improve data transmission flexibility, a system constructs a minimum-scale bottom layer physical network topology, data subscription and distribution are carried out by the system through DDS software, a Topic-MsgID mapping relation is dynamically established, and all subjects of a terminal-terminal share the same MsgID. And when the system Topic subscribes and distributes, the DDS software completes data transmission according to the Topic-MsgID mapping relation established at the bottom layer. The system adopts unicast FC message to realize terminal-terminal data transmission, adopts broadcast message for dynamic discovery, and establishes mapping relation between Topic and MsgID.
The system operation scheme is as follows:
1. underlying network topology construction
And when the system is initialized, a minimum-scale bottom layer physical network topology is established, each terminal plans an FC unicast message with another terminal, plans an FC broadcast message, establishes a communication table, and all themes sent to the other network terminal by each network terminal share one bottom layer MsgID. The transmission and the reception are in the same physical topology, the physical layer has only one topology structure, the communication table comprises a transmission table and a reception table, and the transmission table and the reception table comprise message source addresses and message destination addresses. The data transmission topology is shown in fig. 1.
2. Topic subscription
And the receiving terminal carries out theme subscription through DDS software, and the DDS software sends a corresponding FC broadcast message according to the constructed underlying network topology to carry out theme subscription on the terminal.
Topic-MsgID mapping
The FC broadcast message is adopted to realize dynamic discovery, when a receiving terminal 1 needs to subscribe to the TopicX, the terminal 1 sends the FC broadcast message through DDS software to perform TopicX subscription, and after other terminals receive the FC broadcast message TopicX subscription information, the DDS software establishes a mapping relation of Topic-MsgID according to a communication table;
4. data transmission
And (3) carrying out Topic distribution by using the application software of the sending terminal N through DDS software, and sending the FC unicast message corresponding to the MsgID by using the DDS software according to the Topic-MsgID mapping relation constructed in the step (3) to finish data sending.
5. Data reception
And the receiving terminal 1DDS software analyzes the received FC unicast message, submits the received topic to a corresponding buffer area according to the subscription relation and completes data reception.
Communication table:
table 1 terminal X sends message table
| MsgID | Msg_src_id | Msg_dst_id |
| Msg1 | Portx | Port1 |
| Msg2 | Portx | Port2 |
| Msg3 | Portx | Port3 |
| MsgN | Portx | Port4 |
Table 2 terminal X received message table
| MsgID | Msg_src_id | Msg_dst_id |
| Msg5 | Port1 | Portx |
| Msg6 | Port2 | Portx |
| Msg7 | Port3 | Portx |
| Msg8 | Port4 | Portx |
Theme mapping table:
TABLE 3 Topic-MsgID mapping Table
| Topic | MsgID |
| 1 | Msg1, |
| 2 | Msg1,Msg3,Msg4 |
| 3 | Msg5 |
| 4 | Msg5,Msg6,Msg7,Msg8 |
Claims (1)
1. A data subscription and distribution method based on FC network is characterized in that the method specifically comprises the following steps:
(1) underlying network topology construction
Constructing a minimum-scale bottom layer physical network topology during system initialization, planning an FC unicast message and an FC broadcast message by each terminal and another terminal, establishing a communication table, and sharing a bottom layer MsgID by all themes sent to another network terminal by each network terminal; the sending and receiving are the same physical topology, the physical layer has only one topological structure, the communication table includes sending table and receiving table, the sending table and receiving table includes message source address and destination address;
(2) topic subscription
The receiving terminal carries out theme subscription through DDS software, and the DDS software sends corresponding FC broadcast messages according to the constructed underlying network topology and carries out theme subscription on other terminals;
(3) Topic-MsgID mapping
The FC broadcast message is adopted to realize dynamic discovery, when a receiving terminal needs to subscribe to the TopicX, the receiving terminal sends the FC broadcast message through DDS software to perform TopicX subscription, and after other terminals receive the FC broadcast message, the DDS software establishes a mapping relation of Topic-MsgID according to a communication table;
(4) data transmission
Sending terminal application software carries out Topic distribution through DDS software, and the DDS software sends an FC unicast message corresponding to the MsgID according to the Topic-MsgID mapping relation established in the step 3 to finish data sending;
(5) data reception
And the DDS software of the receiving terminal analyzes the received FC unicast message and submits the received topic to a corresponding buffer area according to the subscription relation to complete data reception.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011427346.1A CN112821952A (en) | 2020-12-07 | 2020-12-07 | Data subscription and distribution method based on FC network |
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| CN202011427346.1A CN112821952A (en) | 2020-12-07 | 2020-12-07 | Data subscription and distribution method based on FC network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890680A (en) * | 2021-09-27 | 2022-01-04 | 电子科技大学 | Transmission method applied to fiber channel avionics network DDS |
| CN114025005A (en) * | 2021-09-30 | 2022-02-08 | 山东云海国创云计算装备产业创新中心有限公司 | Data communication method, system, electronic equipment and storage medium |
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2020
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| US20060149840A1 (en) * | 2005-01-06 | 2006-07-06 | Tervela, Inc. | End-to-end publish/subscribe middleware architecture |
| CN106713096A (en) * | 2017-01-24 | 2017-05-24 | 北京国科天迅科技有限公司 | Bus type FC-AE-1553 network system and data transmission method and data acquisition method between network terminals |
| CN111371596A (en) * | 2020-02-25 | 2020-07-03 | 中国航空无线电电子研究所 | Data distribution service software based on FC-AE bus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113890680A (en) * | 2021-09-27 | 2022-01-04 | 电子科技大学 | Transmission method applied to fiber channel avionics network DDS |
| CN114025005A (en) * | 2021-09-30 | 2022-02-08 | 山东云海国创云计算装备产业创新中心有限公司 | Data communication method, system, electronic equipment and storage medium |
| CN114025005B (en) * | 2021-09-30 | 2023-06-16 | 山东云海国创云计算装备产业创新中心有限公司 | Data communication method, system, electronic equipment and storage medium |
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Application publication date: 20210518 |