Dynamic data communication method and device based on DDS technology

Abstract

The invention belongs to the field of real-time embedded network communication, and particularly relates to a dynamic data communication method and device based on the DDS technology. The method comprises the following steps: step 1, generating a communication channel according to a theme ID dynamically generated in a DDS communication process; step 2, judging whether communication data needs to be routed or not according to a theme routing table, and transmitting the communication data through the communication channel; and step 3, after the communication is finished, releasing theme memory resources, and updating the theme routing table. According to the dynamic data communication method based on the DDS technology, a user can adapt to the point-to-point communication requirement of eachnode without configuring a theme in the communication process. Each communication node only receives the control information and does not receive information irrelevant to the node, so that redundantinformation is avoided, and meanwhile, the safety of data is ensured.

Description

Technical field [0001] This application belongs to the field of real-time embedded network communication, and particularly relates to a dynamic data communication method and device based on DDS technology. Background technique [0002] Real-time network applications will select the corresponding communication protocol according to the application scenario. At present, for applications that use DDS technology for communication, there is a problem of low communication efficiency, which is mainly caused by the following shortcomings: a) DDS theme Too many occasions occupy system memory and increase application memory usage; b) When there are too few DDS themes, communication efficiency is low, network traffic is occupied, and application CPU usage is increased; c) Theme occasions are configured as needed, and communication The two parties have too many restrictions and lack of communication flexibility, which reduces the maintainability of the software. If the real-time network app...

AI Technical Summary

Problems solved by technology

[0002] Real-time network applications will choose the corresponding communication protocol according to the application scenario. At present, for applications that use DDS technology for communication, there is a problem of low communication efficiency, which is mainly caused by the following shortcomings: a) The theme of DDS Too many occasions occupy the system memory, which increases the memory usage rate of the application program; b) when there are too few topics in DDS, the communication efficiency is low, occupying network traffic, and increasing the CPU usage rate of the application program; c) when the theme is configured on demand, the communication Too many restrictions on both sides, lack of communication flexibility, reducing the maintainability of the software

If the real-time network application program does not use DDS technology to communicate, using UDP protocol to communicate can also meet the communication requirements. There are the following disadvantages in using UDP protocol for communication: a) Using UDP protocol to send and receive information on the network, the network The order is greatly affected by the environment, and it is prone to out-of-order situations; b) UDP unicast communication is used, for situations with multiple receivers, the communication efficiency is low and the receiving time is not synchronized; c) UDP multicast communication is used, for two In the occasions where the end frequently changes, the multicast group cannot be flexibly configured, and the communication range is limited; d) UDP broadcast communication is used, the communication security is difficult to guarantee, and the communication efficiency is low

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