Research Article
Maximum Delay-Constrained Source Rate over a Wireless Channel
@INPROCEEDINGS{10.4108/valuetools.2007.1965, author={Beatriz Soret and M. Carmen Aguayo-Torres and J. Tom\^{a}s Entrambasaguas}, title={Maximum Delay-Constrained Source Rate over a Wireless Channel}, proceedings={2nd International ICST Conference on Performance Evaluation Methodologies and Tools}, proceedings_a={VALUETOOLS}, year={2010}, month={5}, keywords={Effective bandwidth wireless systems Quality of Service delay}, doi={10.4108/valuetools.2007.1965} }
- Beatriz Soret
M. Carmen Aguayo-Torres
J. Tomás Entrambasaguas
Year: 2010
Maximum Delay-Constrained Source Rate over a Wireless Channel
VALUETOOLS
ICST
DOI: 10.4108/valuetools.2007.1965
Abstract
Providing Quality of Service (QoS) guarantees in the presence of delay-sensitive data streams demands the understanding of the delay's behavior. Moreover, the support of QoS over a wireless channel comes up against to the time-varying nature of the channel. In this work, we accommodate both issues and evaluate the maximum source rate such that certain delay bound Dt can be supported with a violation probability ε. We call this maximum source rate Capacity with Probabilistic Delay Constraint CDt,ε. The effective bandwidth theory is a framework widely used to analyze wired networks and constitutes the basis of the work with the necessary adaption for its use in a wireless system. The time-correlated nature of the wireless channel has been modeled with a Finite State Markov Chain (FSMC). As expected, the maximum CDt,ε. increases for long allowed delays (Dt ← ∞) and diminishes when the delay constraint is more strict. The expected delay violation probability is compared to simulations in order to validate our results.