基于发布订阅的实时交互平台NetDDS的设计与实现

According to the large scale, wide application and complex running environment of distributed systems, the functionality and performance of distributed interactive platforms are studied, and a real-time interactive platform named NetDDS based on publish/subscribe mechanism is designed and implemented. The hierarchical design idea is adopted to build the middleware from the distribution service, QoS guarantee and data transmission layers, providing the data synchronization function based on the publish/subscribe mechanism, flexible and configurable quality of service guarantee mechanism and multi-protocol data transmission mechanism based on Ethernet. The proposed middleware guarantees the real-time, correctness and reliability of data transmission. Experiment results show that the middleware has a low message update delay and meets the requirements of real-time data distribution in distributed applications.