Time-Sensitive Vehicular NetworksThe advent of various new functions to enhance safety and convenience of vehicle experience has led to a rapid growth of both intra- and inter-vehicle communication. This vehicular communication requires not only low-latency and ultra-reliable communication, but also cost-efficient implementation. We have been developing effective ways of achieving reliable communication and cost-efficient implementation for promising vehicular communication architectures which consist of heterogeneous communication protocols such as controller area network (CAN), time-sensitive Ethernet, and etc.
We have developed “EACAN” which controls the vehicular system mode by monitoring the near-past error behavior of controller area network (CAN) to achieve reliable communication. By conducting extensive experiments and simulation, the CAN bandwidth is shown to be efficiently utilized using EACAN while guaranteeing the reliability requirement.
We have developed “PAMT” which is a priority assignment algorithm for systems composed of both CAN and CAN-FD nodes to utilize the given CAN bandwidth efficiently. PAMT is shown to be an optimal priority assignment algorithm for the system.
Design Optimization of Frame Preemption in Real-Time Switched Ethernet
This project addresses the synthesis problem for frame preemption on Ethernet according to the recently developed 802.1Qbu-2016 and 802.3br-2016 standards. Specifically, we have been studying the problem of assigning priorities, and hence queue allocation, of each real-time data flow, as well as, for each queue, assigning whether it transmits in the preemptable MAC (pMAC) or express MAC (eMAC) interface of the corresponding egress port. We have developed a genetic algorithm-based optimization approach for the synthesis problem. We have already conducted extensive simulations while varying sizes and complexities, including automotive real-life test cases.
“SnB” is proposed to resolves a serious problem which is likely to cause consecutive message reception failures, in the current standardized mode4 resource allocation for LTE-V2X. To resolve the problem, we are exploring ways to combine the randomized resource allocation with the current standard.
- Kang G. Shin
Taeju Park and Kang G. Shin, Optimal Priority Assignment for Scheduling Mixed CAN and CAN-FD Frames, in the 25th IEEE Real-Time and Embedded Technology and Applications Symposium (RTAS 19), Montreal, Canada, April 2019.
Taeju Park, Soheil Samii, and Kang G. Shin, Design Optimization of Frame Preemption in Real-Time Switched Ethernet, in the 2019 ACM/IEEE Conference on Design, Automation, and Test in Europe (DATE '19), Florence, Italy, March 2019.