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CAN网络的上游是向传输速率更高的Flex Ray协议发展,下游是向LIN协议发展。Flex Ray的速率高、更加安全可靠,但实现成本目前还较高,其接口和收发器方面要求均较高,精度和复杂性更高。因此,未来几年内CAN总线仍占据汽车网络技术的主导。
同时,为适应未来汽车多媒体娱乐系统发展的需要,未来DVD、导航仪、汽车音响将通过数据总线集成在一起,以传输移动图像,这也就需要传输速率更高、更快的网络总线。康晓敦指出,目前市场上已开发出一种MOST标准网络,做音视频娱乐通信,它是基于光纤的通信协议,传输速率可达20多兆,在一些顶级车上已有应用。目前做MOST总线很复杂,MOST网关需用支持多媒体的32位MCU实现,并需要大量的16位单片机做每个子系统的控制,它的应用还需汽车厂商、汽车电子厂商的共同推动。