The document proposes a high integrity profile for the OMG Data Distribution Service (DDS) standard to address its complexity and lack of real-time and priority support for use in safety-critical systems. It defines restrictions and refinements to the DDS specification to reduce optional complexity. It also defines a hierarchical priority model and multicast data dissemination technique. The profile is implemented on the Real-Time Specification for Java platform using patterns to support the priority model while achieving certification standards for high integrity systems. Evaluation shows the implementation meets deterministic and bounded latency requirements.

1. Design and Evaluation of a High Integrity Profile for the DDS Vincenzo Caruso [email_address] With the support of Iniziativa Software - Roma

10. QoS Policies Distilled Reliability Persistence Timeliness * T = Topic, DW = DataWriter, DR = DataReader Only the most important 9, there are over 20 total policies… Specify the (maximum) latency of a publication. Can be used to optimize the send process DR,DW,T LATENCY_ BUDGET Sets the priority of the transport, if available… DW,T TRANSPORT_ PRIORITY Minimum period between two notifications. DR TIME_BASED_FILTER The maximum period between two publications DR,DW,T DEADLINE How many data samples are kept by the middleware: KEEP_ALL, KEEP_LAST_N DR,DW,T HISTORY How publications are cached by the middleware: VOLATILE, TRANSIENT, PERSISTENT DR,DW,T DURABILITY The DataWriter with the higher STRENGTH is the only one enabled to publish on an EXCLUSIVE Topic DW STRENGTH Topic updated by any DataWriter ( SHARED ) or by only one ( EXCLUSIVE ) T OWNERSHIP Communication Semantics: RELIABLE or BEST_EFFORT DR,DW,T RELIABILITY Description: Applies To*: Policy Name: