Abstract: This paper takes the USB OTG communication system as a study object, and gives a three levels method of fault recovery. The three levels include reset and Flash writing protection on the chip level, apply checkpoint-based rollback recovery on node level, and add safe data transporting layer above application layer on system level. Experimental results show that this method can improve the ability of system fault recovery, and ensure the stability and reliability of USB OTG communication.

Key words: USB OTG protocol, interference, communication, transient fault, safety transmission layer

摘要： 以USB OTG通信系统为研究对象，提出一种基于芯片级、节点级和系统级的3层故障恢复方法。芯片级采用复位保护和Flash写保护，节点级应用基于检查点的向后恢复方案，系统级在应用层之上添加安全数据传输层进行综合故障恢复。实验结果表明，该方法能提高系统的瞬时故障恢复能力，保证USB OTG通信的稳定性与可靠性。

关键词: USB OTG协议, 干扰, 通信, 瞬时故障, 安全传输层

CLC Number: 

• TP301.6