| Citation: | WANG Jingjing, LI Qiao, XIONG Huagang, et al. Integrated planning method and optimization for off-chip time-triggered communication[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(1): 170-180. doi: 10.13700/j.bh.1001-5965.2019.0136(in Chinese)
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As the processing capacity of system-on-chip (SoC) is getting close to the traditional integrated core processing module, the avionics system is developing towards the miniature, integrated off-chip system. Time-triggered switched interconnection can guarantee the strictly time deterministic property of off-chip message transmission. Considering the off-chip interconnection characteristics of lightweight switch structure and limited port number on a chip, an integrated planning method for off-chip time-triggered communication was proposed under the condition of interaction among topology planning, routing and scheduling. Given time-triggered message sets and port configuration, the off-chip interconnection network topology, message routing and scheduling table were obtained at the same time. Then the message allocation order is optimized using immune algorithm to further improve the performance of the algorithm. The simulation results show that, compared with the integrated planning method without consideration of overall optimization, the optimized method reduced the congestion on message transmission paths, reduced the message end-to-end delay and increased the schedulability of message sets while generating the off-chip interconnection topology with low costs.
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