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arXiv cs/0403044cs.LOcs.NI
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用于802.11协议验证的可扩展概率模型

Scalable Probabilistic Models for 802.11 Protocol Verification

Amitabha Roy, K. Gopinath

摘要:

IEEE 802.11协议是用于无线局域网的流行标准。其介质访问控制层(MAC)是具有冲突避免的载波侦听多路访问(CSMA/CA)设计,并且包括指数退避机制,这使得其成为概率模型检验的可能目标。在这项工作中,我们确定的方法来增加概率模型检验的802.11 MAC的应用范围。目前的技术甚至不能扩展到中等规模的网络。为了解决这个问题,我们确定的协议,可以用来简化模型,使验证可行的属性。使用这些观察,我们直接优化概率时间自动机模型,同时保留概率可达性措施。我们证实了我们的索赔显着减少我们的结果使用概率模型检查PRISM。

英文摘要:

The IEEE 802.11 protocol is a popular standard for wireless local area networks. Its medium access control layer (MAC) is a carrier sense multiple access with collision avoidance (CSMA/CA) design and includes an exponential backoff mechanism that makes it a possible target for probabilistic model checking. In this work, we identify ways to increase the scope of application of probabilistic model checking to the 802.11 MAC. Current techniques do not scale to networks of even moderate size. To work around this problem, we identify properties of the protocol that can be used to simplify the models and make verification feasible. Using these observations, we directly optimize the probabilistic timed automata models while preserving probabilistic reachability measures. We substantiate our claims of significant reduction by our results from using the probabilistic model checker PRISM.

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