| Citation: | LI Ershuai, HE Feng, XIONG Huaganget al. End-to-end traffic latency computation using frame shaping model in AVB network[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(7): 1442-1449. doi: 10.13700/j.bh.1001-5965.2016.0539(in Chinese)
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Audio video bridging (AVB) Ethernet is an available Ethernet-based solution for audio and video stream transmissions within embedded networking context, in which credit-based shaping (CBS) algorithm is defined to guarantee the end-to-end latency performance according to stream models. When considering the discrete characteristics of frame queuing and scheduling behavior in an actual networking scenario, an improved frame model CBS was proposed to replace the stream model CBS algorithm. According to this new model, the worst-case transmission latency was deduced by eliminating non-schedulable traffic in the network. A representative in-vehicle application scenario was established to verify the end-to-end latency performance of the frame model CBS. The results indicate that the frame model CBS can obtain a better end-to-end latency evaluation than the stream model CBS. Especially, the tightness of frame model CBS is clearer for the lower priority AVB traffics within the whole AVB networks.
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