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WICOMM
2010
91views more  WICOMM 2010»
9 years 6 months ago
A sensing-based cognitive coexistence method for interfering infrastructure and ad hoc systems
The rapid proliferation of wireless systems makes interference management more and more important. This paper presents a novel cognitive coexistence framework, which enables an in...
Stefan Geirhofer, Lang Tong, Brian M. Sadler
PE
2010
Springer
102views Optimization» more  PE 2010»
9 years 6 months ago
Extracting state-based performance metrics using asynchronous iterative techniques
Solution of large sparse linear fixed-point problems lies at the heart of many important performance analysis calculations. These calculations include steady-state, transient and...
Douglas V. de Jager, Jeremy T. Bradley
JSAC
2008
95views more  JSAC 2008»
9 years 6 months ago
Cognitive Medium Access: Constraining Interference Based on Experimental Models
In this paper we design a cognitive radio that can coexist with multiple parallel WLAN channels while abiding by an interference constraint. The interaction between both systems is...
Stefan Geirhofer, Lang Tong, Brian M. Sadler
TSP
2008
107views more  TSP 2008»
9 years 7 months ago
Opportunistic Spectrum Access via Periodic Channel Sensing
The problem of opportunistic access of parallel channels occupied by primary users is considered. Under a continuous-time Markov chain modeling of the channel occupancy by the prim...
Qing Zhao, Stefan Geirhofer, Lang Tong, Brian M. S...
TSP
2008
106views more  TSP 2008»
9 years 7 months ago
An EM Algorithm for Ion-Channel Current Estimation
Parameter estimation of a continuous-time Markov chain observed through a discrete-time memoryless channel is studied. An expectation-maximization (EM) algorithm for maximum likeli...
William J. J. Roberts, Yariv Ephraim
WSC
2008
9 years 10 months ago
Speeding up call center simulation and optimization by Markov chain uniformization
Staffing and scheduling optimization in large multiskill call centers is time-consuming, mainly because it requires lengthy simulations to evaluate performance measures and their ...
Eric Buist, Wyean Chan, Pierre L'Ecuyer
FORMATS
2007
Springer
9 years 12 months ago
CSL Model Checking Algorithms for Infinite-State Structured Markov Chains
Jackson queueing networks (JQNs) are a very general class of queueing networks that find their application in a variety of settings. The state space of the continuous-time Markov c...
Anne Remke, Boudewijn R. Haverkort
IPPS
2006
IEEE
10 years 2 months ago
A design environment for mobile applications
In this paper we show how high-level UML models of mobile computing applications can be analysed for classical performance measures such as throughput. The approach proceeds by co...
Stephen Gilmore, Valentin Haenel, Jane Hillston, J...
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