Achieving Quality of Service Differentiation in Ethernet 10BASE-T1S nodes

Ethernet 10BASE-T1S is an Ethernet variant, mainly intended for automotive applications, that operates at 10 Mbps on a single-pair physical layer. For the half-duplex multidrop topology, the Ethernet 10BASE-T1S standard specifies the Physical Layer Collision Avoidance (PLCA) channel access method, which enables low-latency collision-free cyclic transmissions, but does not implement any mechanism within a node to differentiate between the diverse traffic flows generated. However, in automotive applications Quality of Service (QoS) support is beneficial to meet the requirements of the diverse types of flows. For this reason, this work proposes an application-level traffic shaping mechanism to provide QoS differentiation over Ethernet 10BASE-T1S networks, and discusses the end-to-end delay results obtained via OMNeT++ simulations in a realistic automotive scenario.