Study on Data Transmission of DCPS Publish-Subscribe Model

There're two delivery models of data distuibution service(DDS) which is published by OMG, “best-effort delivery model” and “reliable delivery model”. DDS uses best-effort delivery by default in the communication. However, “best-effort delivery” can't satisfy the reliability of communication. This paper researches on reliable delivery model and analyses how the reliable protocol of DDS works in nomal and sample-lost situations. Relative QoS policies are configured to set up sizes of sending queue and receiving queue and frequency of heartbeat messages. At last, the comparision of best-effort delivery and reliable delivery declares the situations which the two models apply to.