Comparative benchmark of serialization overhead, zero-copy socket buffers, dynamic discovery, and real-time determinism across automotive protocol stacks.
Encoding vehicle data into network byte buffers consumes significant CPU cycles on embedded processors. CommonAPI with SOME/IP requires deep structural traversal during marshaling. OMG Common Data Representation (CDR) used in DDS is faster, while zero-copy FlatBuffers allow consumers to access fields directly in socket buffers without parsing.
DDS and SOME/IP-SD rely on dynamic multicast announcements to locate publishers and services at runtime. While flexible, dynamic discovery introduces network broadcast bursts during vehicle ignition. Safety-critical systems (ASIL-D) enforce statically provisioned IP tables and pre-allocated port manifests to ensure deterministic startup in under 50 milliseconds.