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Replace this file with prentcsmacro.sty for your meeting, or with entcsmacro.sty for your meeting. Both can be
 

Summary: Replace this file with prentcsmacro.sty for your meeting,
or with entcsmacro.sty for your meeting. Both can be
found at the ENTCS Macro Home Page.
Closed, Open, and Robust Timed Networks
Parosh Aziz Abdulla, Johann Deneux, and Pritha Mahata 1
Dept. of Information Technology, Uppsala University, Sweden
Abstract
We consider verification of safety properties for parameterized systems of timed processes,
so called timed networks. A timed network consists of a finite state process, called a con­
troller, and an arbitrary set of identical timed processes. In [AJ03] it was shown that check­
ing safety properties is decidable in the case where each timed process is equipped with a
single real­valued clock. In [ADM04], we showed that this is no longer possible if each
timed process is equipped with at least two real­valued clocks. In this paper, we study two
subclasses of timed networks: closed and open timed networks. In closed timed networks,
all clock constraints are non­strict, while in open timed networks, all clock constraints are
strict (thus corresponds to syntactic removal of equality testing). We show that the prob­
lem becomes decidable for closed timed network, while it remains undecidable for open
timed networks. We also consider robust semantics of timed networks by introducing tim­
ing fuzziness through semantic removal of equality testing. We show that the problem is
undecidable both for closed and open timed networks under the robust semantics.

  

Source: Abdulla, Parosh Aziz - Department of Information Technology, Uppsala Universitet

 

Collections: Computer Technologies and Information Sciences