Providing service differentiation for optical-burst-switched networks
Journal
Journal of Lightwave Technology
Journal Volume
22
Journal Issue
7
Pages
1651-1660
Date Issued
2004-07
Author(s)
Chi-Hong Lu
Abstract
This paper proposes a service differentiation scheme called preemptive wavelength reservation protocol (PWRP) to provide proportional quality of service (QoS) for optical-burst-switched (OBS) networks. In the context of service differentiation, traffic is divided into different service classes based on traffic characteristics. A service differentiation scheme then provides different degrees of resource assurance to different classes of traffic in proportion to their service classes. Unlike existing approaches, which may degrade to classless schemes or which may suffer from low wavelength utilization, the mechanism in this paper is robust and efficient and supports an incremental deployment of QoS support. A usage profile for each class is maintained at the router, and a preemptive wavelength reservation mechanism is implemented to ensure QoS. An analytical model is derived and simulations are conducted to evaluate the performance. The results show that the approach described in this paper performs better than existing mechanisms in terms of lower blocking probability and higher resource utilization, making it an excellent QoS mechanism for OBS networks. © 2004 IEEE.
SDGs
Other Subjects
Computer simulation; Fiber optic networks; Mathematical models; Network protocols; Optical switches; Probability; Quality of service; Resource allocation; Routers; Telecommunication services; Telecommunication traffic; Optical burst switching; Preemptive wavelength reservation protocol; Service differentiation; Wavelength reservation; Optical communication
Type
journal article