Formalisms based on Hoare's Communicating Sequential Processes (CSP) and Milner's Calculus of Communicating Systems (CCS) for verifying protocols are currently being used by the International Standard Organisation (ISO). However, these models need to be extended if protocol performance specification and verification is to be done, as neither of these models have timing information (other than sequencing) nor a way of specifying controlled loss of information.
rnThis paper presents two extensions to Hoare's CSP that are felt by the author to provide suitable mechanisms for specifying protocol performance. Firstly, the effects of introducing time into CSP are presented, based on the work done by Reed and Roscoe. Secondly, the traces model is modified by associating probabilities with event sequences.
rnFinally, some example specifications are given using these two extensions.
本文介绍了Hoare的CSP的两个扩展,作者认为它们提供了用于指定协议性能的合适机制。首先,根据Reed和Roscoe所做的工作,介绍了将时间引入CSP的效果。其次,通过将概率与事件序列相关联来修改跟踪模型。 P> rn
最后,使用这两个扩展给出一些示例规范。 P>
Univ. of Sydney, Australia;
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