Title
Fixed-delay events in generalized semi-Markov processes revisited
Abstract
We study long run average behavior of generalized semi-Markov processes with both fixed-delay events as well as variable-delay events. We show that allowing two fixed-delay events and one variable-delay event may cause an unstable behavior of a GSMP. In particular, we show that a frequency of a given state may not be defined for almost all runs (or more generally, an invariant measure may not exist). We use this observation to disprove several results from literature. Next we study GSMP with at most one fixed-delay event combined with an arbitrary number of variable-delay events. We prove that such a GSMP always possesses an invariant measure which means that the frequencies of states are always well defined and we provide algorithms for approximation of these frequencies. Additionally, we show that the positive results remain valid even if we allow an arbitrary number of reasonably restricted fixed-delay events.
Year
Venue
Keywords
2011
international conference on concurrency theory
fixed-delay event,generalized semi-markov process,invariant measure,arbitrary number,positive result,unstable behavior,variable-delay event,average behavior
DocType
Volume
ISSN
Conference
abs/1106.1424
0302-9743
Citations 
PageRank 
References 
7
0.57
21
Authors
4
Name
Order
Citations
PageRank
Tomáš Brázdil119413.11
Jan Krčál2797.45
Jan Křetínský319012.05
Vojtěch Řehák4685.99