在半双工以太网PLCA多点上启用时间感知整形器.pdf

1、IEEE-SA Ethernet&IP Automotive Technology DayBrazil-September 2023#Universidade Federal de Pernambuco Brazil*Instituto Federal de Pernambuco BrazilRuhr University Bochum-GermanyEnabling Time-Aware Shaper on Half-Duplex Ethernet PLCA MultidropDavid A.Nascimento#*(dancin.ufpe.br)Steffen Bondorf(steffe

2、n.bondorfruhr-uni-bochum.de)Divanilson R.Campelo#(dcampelocin.ufpe.br)AgendaAgenda Introduction Time-Aware Shaper(TAS)10BASE-T1S Physical Layer Collision Avoidance(PLCA)TAS+PLCA Full-duplex switched Ethernet vs Half-duplex PLCA Multidrop Ethernet Results Conclusion Future work2IntroductionIntroducti

3、onTime-Sensitive Networking(TSN)Time Synchronization,Ultra reliability,Bounded low latency,and Dedicated Resources&APITSN includes IEEE 802.3Qbv Time-Aware Shaper(TAS)Ultra-low latency,jitter,and loss TAS is a solution for deterministic systems Real-time and safety-critical applications31 K.Matheus

4、and T.Knigseder,Automotive Ethernet,3rd ed.Cambridge University Press,2021.Most Ethernet implementations today Switched networks with full-duplex linksProblems They may be costly for some use cases,mainly automotive Over 90%of the current internal communication links need less than 10 Mbps1 100BASE-

5、T1 is not cost-efficient for replacing CAN(Controller Area Network)or CAN-FD(CAN with Flexible Data Rate)Solution 10BASE-T1SIntroductionIntroductionThe integration of TAS and 10BASE-T1S PLCA enables many possibilities No gateways End-to-end transmissions of scheduled traffic Ethernet flows All-Ether

6、net Vehicle4TimeTime-AwareAware ShaperShaper Gate Control List(GCL)Clock-based open-close gate scheduling for all priority queues Scheduled Traffic(ST)Time slots for transmissions(windows)Exclusive windows Lowest delay bounds More complex to provide(NP-hard)Similar to Time Division Multiple Access(T