Design of Time-Triggered Service Processing Flow on Ethernet end System
Zhihai Zheng, Weitao Pan, Zhiliang Qiu, Longjiang Zhan · 2021 7th International Conference on Computer and Communications (ICCC) · 2021
TTE(Time triggered Ethernet) network combines the flexibility, compatibility, best effort characteristics of our traditional Ethernet and the real-time, reliability and fault tolerance characteristics of time triggered transmission, which can support various types of application services. TTE network mainly includes TT(Time Trigger) service and ET(Event Trigger) service. For the transmission mechanism of traditional Ethernet, it can be understood as a transparent transmission in the TTE network, which means that the reliability of its transmission on the network is not guaranteed. However, for the important data entering the TTE network, we often need to ensure that its transmission will not be disturbed by other services. Based on this problem, this paper proposes how the TTE end system encapsulates and decapsulates a TT special field for ordinary Ethernet data from a Gigabit Ethernet camera. The encapsulation is to add special fields about TT in front of the data and the encapsulated data will successfully complete the transmission in the TTE device. Decapsulation is to remove the encapsulated part, uploads the original data to the PC(Personal Computer) host. At the same time, the end system also counts the bandwidth rate of the two service flow and uploads them to the PC host. For TT service flow, it has the highest priority in TTE network, so as to ensure that camera data will not be disturbed by other services. For comparison test, the end system will also generate a BE (Best effort) service flow into the network for transmission and the BE service belongs to the ET service, so its transmission is not guaranteed. This design is realized through FPGA(Field Programmable Gate Array) and it supports the business in 1G/bps Gigabit Ethernet port transmission, and provides the media access control layer function for the business.