Design and Implementation of A Hard Real-Time Communication Protocol

摘要

In this paper, we present an Ethernet-based protocol called RTCC that provides hard real-time performance guarantees to distributed hard real-time applications without requiring any modifications to existing Ethernet hardware. Two novel mechanisms, the command / response multiplex transmission and table bus, are introduced in RTCC in order to schedule the channels. We claim that RTCC solves perfectly the two critical real-time communication problems: an access arbitration process and a transmission control process. Performance measurements from experiments on a 10 Mbps Ethernet indicate that RTCC has a satisfactory determinism.