A "request-response" data communication method based on dds standard

Abstract

The present invention proposes a "request-response" data communication method based on the DDS standard, comprising the following steps: 1) defining the "request-response" domain; 2) defining the "request-response" topic and message structure; All participants that include the "request-response" application requirements join the domain and subscribe to the topic; 4) The requester creates a request message according to the unified message definition: 5) The requester uses the DDS standard "publish" operation to send the request message; 6) All Subscribers in the domain use the targetId field to filter the received messages; 7) The responder uses the corresponding technology to deserialize the param field of the request message to obtain the request parameters. The present invention proposes a "request-response" data communication method based on the DDS standard. On the basis of DDS, a unified message structure is defined and filtered by the subscriber to achieve point-to-point transmission under the same topic. On this basis, " request-response communication.

Description

technical field [0001] The invention belongs to the field of airborne embedded software, and in particular relates to "request-response" data communication in a digital information system based on a data distribution service (Date Distribution Service, DDS) standard proposed by an Object Management Group (OMG) organization Way. Background technique [0002] The DDS standard proposed by the OMG organization describes the data bus communication method based on the "publish-subscribe" model, which simplifies the problem of excessive module coupling in distributed data communication, realizes the "instrumentation" type module design, and provides The QoS policy is adopted, which guarantees the reliability and real-time performance of data; however, the "publish-subscribe" communication model it only contains is not applicable in the case of interactive "request-response" business logic, which greatly reduces the limits its scope of application. SUMMARY OF THE INVENTION [00...

AI Technical Summary

Problems solved by technology

[0002] The DDS standard proposed by the OMG organization describes the data bus communication method based on the "publish-subscribe" model, which simplifies the problem of high module coupling in distributed data communication, realizes the "pluggable" module design, and provides The QoS strategy provides guarantee for data reliability and real-time; however, the "publish-subscribe" communication model it only includes is not applicable in the case of interactive "request-response" business logic, which greatly limits its scope of application

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