Real-time dynamic logic loop mechanism of vehicular network management based on instantaneous load sensing

The real-time network management (NM) is one of the most important mechanism to guarantee the communication safety between the vehicular electronic control units. However, the popular OSEK NM is based on the static logic ring and its real-time performance is expected to improve. After the operation mechanism of OSEK NM is analyzed and the time radius is given to depict the real-time performance of the logic ring, a dynamic logic ring mechanism is proposed. The formula for the average network load rate and the instantaneous network load is derived. The NM of the dynamic logic ring is formulated as an optimal problem which aims to minimize instantaneous network load. Based on the optimal model, a logic ring dynamic adjustment algorithm (LRDA) is proposed. The simulation experiments in the CANoe showed that the proposed method can dynamically adjust the time radius of logic ring according to the instantaneous network load and effectively improve the real-time performance of vehicular network management.