传统CAN总线的局限性之一在于其静态优先权分配机制使得网络带宽无法公平分配给各总线节点,在网络负载较重时,甚至会出现低优先级节点无法获得总线访问权从而造成严重传输延迟的现象.针对该问题,提出了一种在系统运行时基于优先权动态重置思想的改进方案,并通过仿真试验,验证了改进方案的正确性和有效性.“,”One of the limitations of the conventional CAN bus protocol is that its static priority assignment mechanism makes it impossible to fairly assign the bandwidth between the inserted bus nodes. Especially under a heavy-load condition, serious transmission delay may occur because the low-priority nodes can’t access the bus. Due to this problem, presents an improved CAN protocol which reassign dynamically the bandwidth, and verify the correctness and effectiveness of this new protocol through simulation.