摘要:运行时验证是提升普适计算应用可靠性的重要手段.这类应用的很多性质同时涉及时间关系和空间位置关系，这样的时空性质给运行时的验证带来了特有挑战：一方面，传统的时态逻辑难以描述空间性质；另一方面，适合描述空间性质的Ambient Logic在真值不确定等情况下不能很好地支持有限轨迹中时间性质的描述.为支持普适计算应用时空性质的运行时验证，引入三值逻辑语义，提出了AL₃（3-valued ambient logic）；并在此基础上设计实现了基于AL₃的性质检验算法和运行时监控器.最后，通过案例分析和运行效率实验阐明了所提方法的有效性和可行性.



Abstract:Runtime verification is an important method for improving software reliability of pervasive computing applications. Some properties of these applications consider both temporal and spatial relationships. Such spatio-temporal properties bring some specific challenges for runtime verification. On one hand, traditional temporal logic cannot describe spatial properties. On the other hand, while ambient logic is suitable for spatial properties, it does not properly support the description of temporal properties in finite traces, especially when the truth values cannot be decided. In order to support the runtime verification of spatio-temporal properties for pervasive computing applications, this paper firstly imports 3-valued semantics and proposes AL₃ (3-valued ambient logic). On the basis of AL₃, it designs and implements an algorithm for properties checking and a runtime monitor. Moreover, the paper uses a case study and a performance measurement to clarify the usability and feasibility of the proposed approach.



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