基于UIO的安全关键实时通信协议NOP的设计与实现  

DESIGN AND IMPLEMENTATION OF SAFETY-CRITICAL REAL-TIME COMMUNICATION PROTOCOL NOP BASED ON UIO

作　　者：狄长艳[1] 张轲[1] 李婵娟[1] 周庆国[1] 

机构地区：[1]兰州大学信息科学与工程学院甘肃兰州730000

出　　处：《计算机应用与软件》2013年第9期29-31,共3页Computer Applications and Software

基　　金：国家自然科学基金项目(60973137);甘肃省科技计划项目(1104GKCA049);兰州大学中央高校基本科研业务费专项资金项目(lzujbky-2010-89,lzujbky-2012-44)

摘　　要：NOP(Node Order Protocol)作为一种全新的安全关键实时通信协议,它在IEC61508框架下以节点顺序的理念构建分布式系统,消除通信协议对全局时钟的依赖,建立依赖于节点顺序的以事件为触发模式实现的时间触发协议的传输语义。同时NOP在保证时间触发协议安全性的同时,提高了协议的灵活性和资源利用率。对于NOP协议的实现,结合用户空间接口UIO(Userspace I/O),将NOP作为一个独立于内核之外的单独模块来完成协议的控制和通信,有效地减少由于系统内核崩溃等问题而产生的安全威胁,提高了NOP协议的安全性和可靠性。As a novel safety-critical real-time communication protocol, the node order protocol （NOP） constructs the distributed system with the concept of node order, eliminates the dependence of communication protocol on global time, establishes communication semantics of the time-triggered protocol which depends on node order and realises by using the event as the triggering mode, all are done in IEC61508 frame. And meanwhile, the NOP improves the flexibility and resource utilisation of the protocol when ensuring the safety of time-triggered protocol. For the realisation of the NOP, the Userspace I/O （UIO） is taken into consideration, the NOP is deemed as an independent module outside the kernel space to accomplish the control and communication of the protocol. This can effectively reduce the security threats caused by some problems like system kernel crash, etc. , thus improves the safety and reliability of the NOP.

关 键 词：节点顺序 时间触发 事件触发 UIO 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程] TN913.21[自动化与计算机技术—控制科学与工程]