TY - GEN
T1 - Comparison of time sensitive networking (TSN) and TTEthernet
AU - Zhao, Lin
AU - He, Feng
AU - Li, Ershuai
AU - Lu, Jun
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12/7
Y1 - 2018/12/7
N2 - Time-Triggered Ethernet (TTEthernet) is a time-critical network for industrial and avionics applications improved from the Avionics Full Duplex Switched Ethernet (AFDX). It is standardized by SAE AS6802 and satisfies strict timing transmission by use of a mixture infrastructure to support Time-Triggered (TT), Rate-Constraint (RC) and Best-Effort (BE) traffics. The key feature is a time-triggered communication paradigm according to off-line schedule table based on global synchronization. Three integration methods (preemption, timely block and shuffling) are used to resolve conflict when a TT message gets ready and a RC message is already in transmission. Besides several real-time Ethernet solutions, Time Sensitive Networking (TSN) shows great interests and attractions to satisfy the increasing and variable transmission requirements for automotive and aeronautical industry. TSN is comprised of several IEEE standards developed under IEEE 802.1 TSN Task Group, such as 802.1AS, 802.1Qav, 802.1Qat, 802.1BA, 802.1Qbv and 802.1Qbu. On top of SPQ (Static Priority Queuing) scheduling mechanism, with best effort traffics in parallel, TSN introduces guaranteed timing behavior with focus on the transportation for Control Data traffic (CDT) under Time Aware Shaper (TAS) and audio video streams under Credit-Based Shaper (CBS). This paper introduces the basic principles of TSN standard in details, compares it with the properties of the TTEthernet standard. In particular, we first investigate their clock synchronization algorithms and discuss their shaping and scheduling strategies for traffic types with individual timing requirements. Then we show the impact the hard real-time traffic has on soft real-time traffic and give the worst case end-to-end latency calculation. Finally, we determine whether TSN offers flexibility for the requirements of avionic.
AB - Time-Triggered Ethernet (TTEthernet) is a time-critical network for industrial and avionics applications improved from the Avionics Full Duplex Switched Ethernet (AFDX). It is standardized by SAE AS6802 and satisfies strict timing transmission by use of a mixture infrastructure to support Time-Triggered (TT), Rate-Constraint (RC) and Best-Effort (BE) traffics. The key feature is a time-triggered communication paradigm according to off-line schedule table based on global synchronization. Three integration methods (preemption, timely block and shuffling) are used to resolve conflict when a TT message gets ready and a RC message is already in transmission. Besides several real-time Ethernet solutions, Time Sensitive Networking (TSN) shows great interests and attractions to satisfy the increasing and variable transmission requirements for automotive and aeronautical industry. TSN is comprised of several IEEE standards developed under IEEE 802.1 TSN Task Group, such as 802.1AS, 802.1Qav, 802.1Qat, 802.1BA, 802.1Qbv and 802.1Qbu. On top of SPQ (Static Priority Queuing) scheduling mechanism, with best effort traffics in parallel, TSN introduces guaranteed timing behavior with focus on the transportation for Control Data traffic (CDT) under Time Aware Shaper (TAS) and audio video streams under Credit-Based Shaper (CBS). This paper introduces the basic principles of TSN standard in details, compares it with the properties of the TTEthernet standard. In particular, we first investigate their clock synchronization algorithms and discuss their shaping and scheduling strategies for traffic types with individual timing requirements. Then we show the impact the hard real-time traffic has on soft real-time traffic and give the worst case end-to-end latency calculation. Finally, we determine whether TSN offers flexibility for the requirements of avionic.
KW - Deterministic delay analysis
KW - Network performance evaluation
KW - TSN
KW - TTEthernet
UR - https://www.scopus.com/pages/publications/85060624165
U2 - 10.1109/DASC.2018.8569454
DO - 10.1109/DASC.2018.8569454
M3 - 会议稿件
AN - SCOPUS:85060624165
T3 - AIAA/IEEE Digital Avionics Systems Conference - Proceedings
BT - DASC 2018 - IEEE/AIAA 37th Digital Avionics Systems Conference, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 37th IEEE/AIAA International Digital Avionics Systems Conference, DASC 2018
Y2 - 23 September 2018 through 27 September 2018
ER -