Patrick Wüchner

Learn More
Available online xxxx Keywords: Performance modeling Finite-source retrial queues Orbital search Balking customers Impatient customers MOSEL-2 a b s t r a c t The present paper deals with a generalization of the homogeneous multi-server finite-source retrial queue with search for customers in the orbit. The novelty of the investigation is the introduction(More)
wireless sensor networks using finite-source retrial queues with unreliable orbit. Abstract. Motivated by the need for performance models suitable for modeling and evaluation of wireless sensor networks, we introduce a retrial queueing system with a finite number of homogeneous sources, unreliable servers, orbital search, and unreliable orbit. All random(More)
A method to derive local interaction strategies for improving cooperation in self-organizing systems. Abstract. To achieve a preferred global behavior of self-organizing systems , suitable local interaction strategies have to be found. In general, this is a non-trivial task. In this paper, a general method is proposed that allows to systematically derive(More)
Since the entities composing self-organizing systems have direct access only to information provided by their vicinity, it is a non-trivial task for them to determine properties of the global system state. However, this ability appears to be mandatory for certain self-organizing systems in order to achieve an intended functionality. Based on Shannon's(More)
We consider a retrial queueing system with a finite number of homogeneous sources of calls and a single server. Each source generates a request after an exponentially distributed time. An arriving customer finding the server idle enters into service immediately; otherwise the customer enters into an orbit. The service times are supposed to be exponentially(More)
Ad-hoc information spread between mobile devices: a case study in analytical modeling of controlled self-organization in IT systems. Abstract. We present an example of the use of analytical models to predict global properties of large-scale information technology systems from the parameters of simple local interactions. The example is intended as a first(More)
Some cellular automata are able to solve classification problems on their initial configuration by building globally visible structures. However, no formal measures exist yet for describing or detecting this behavior in general. The lack of such formal methods often leads to quite observer-dependent discussions of emergent computation. In this paper, we(More)