Research of the reliable multicast delay based on DCPS

During the transmission of date based on Date-Centric Publish-Subscribe mechanism, propagation delay could lead to subscriber's data loss is a problem. Proposed to implement the system clock with a network master clock within the time synchronization, Strategy combined with time stamp to find as time delay caused loss of data subscribers, using the topic data as the keyword for cache management, response the requirement of the subscriber about the date dispatching again, ensure the reliable transmission of this part of data. After testing, verification delay does cause data loss, using the data in a replacement mechanism, the issue has been resolved.