Evaluation of preemption probabilities in OBS networks with burst segmentation
Fecha
2005Versión
Acceso abierto / Sarbide irekia
Tipo
Contribución a congreso / Biltzarrerako ekarpena
Impacto
|
10.1109/ICC.2005.1494622
Resumen
Preemption techniques have been recently proposed for service differentiation in Optical Burst Switching (OBS) networks.
According to [1], an incoming burst with the same priority that the burst in service will preempt the wavelength if the residual
length of the burst in service is smaller than the incoming burst transmission time. For a network scenario with no wavelength
conversion, the pre ...
[++]
Preemption techniques have been recently proposed for service differentiation in Optical Burst Switching (OBS) networks.
According to [1], an incoming burst with the same priority that the burst in service will preempt the wavelength if the residual
length of the burst in service is smaller than the incoming burst transmission time. For a network scenario with no wavelength
conversion, the preemption probability is evaluated assuming Exponential, Gaussian and Pareto-distributed burst sizes. Knowledge
of the preemption dynamics at an OBS switch is a fundamental issue in performance evaluation, since the downstream switches
will surely be affected. An analytical upper bound is provided, that shows that the preemption probability depends on the burst
size distribution, which in turn depends on the burst assembly technique used at the network edges. On the other hand, not only
truncated bursts result from preemption, as reported in other studies, but also the burst size distribution for preempting bursts is
shifted to larger values. [--]
Materias
OBS networks,
Priority schemes,
Service differentiation,
Preemption,
Performance evaluation
Editor
IEEE
Publicado en
IEEE International Conference on Communications, 2005 (ICC 2005), vol. 3, pp. 1646 -1650
Notas
Trabajo presentado a la IEEE International Conference on Communications (ICC 2005), mayo de 2005, Seúl (Corea del Sur)
Departamento
Universidad Pública de Navarra. Departamento de Automática y Computación /
Nafarroako Unibertsitate Publikoa. Automatika eta Konputazioa Saila