Paper Info
Title
QoSatAr: a cross-layer architecture for E2E QoS provisioning over DVB-S2 broadband satellite systems.
Abstract
This article presents QoSatAr, a cross-layer architecture developed to provide end-to-end quality of service (QoS) guarantees for Internet protocol (IP) traffic over the Digital Video Broadcasting-Second generation (DVB-S2) satellite systems. The architecture design is based on a cross-layer optimization between the physical layer and the network layer to provide QoS provisioning based on the bandwidth availability present in the DVB-S2 satellite channel. Our design is developed at the satellite-independent layers, being in compliance with the ETSI-BSM-QoS standards. The architecture is set up inside the gateway, it includes a Re-Queuing Mechanism (RQM) to enhance the goodput of the EF and AF traffic classes and an adaptive IP scheduler to guarantee the high-priority traffic classes taking into account the channel conditions affected by rain events. One of the most important aspect of the architecture design is that QoSatAr is able to guarantee the QoS requirements for specific traffic flows considering a single parameter: the bandwidth availability which is set at the physical layer (considering adaptive code and modulation adaptation) and sent to the network layer by means of a cross-layer optimization. The architecture has been evaluated using the NS-2 simulator. In this article, we present evaluation metrics, extensive simulations results and conclusions about the performance of the proposed QoSatAr when it is evaluated over a DVB-S2 satellite scenario. The key results show that the implementation of this architecture enables to keep control of the satellite system load while guaranteeing the QoS levels for the high-priority traffic classes even when bandwidth variations due to rain events are experienced. Moreover, using the RQM mechanism the user’s quality of experience is improved while keeping lower delay and jitter values for the high-priority traffic classes. In particular, the AF goodput is enhanced around 33% over the drop tail scheme (on average).
Year
DOI
Venue
2012
10.1186/1687-1499-2012-302
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
Transmission Control Protocol, Traffic Class, Heavy Rain Event, Expedite Forwarding, Assured Forwarding
Internet Protocol,Computer science,Network layer,Quality of service,Communication channel,Computer network,Real-time computing,Bandwidth (signal processing),Physical layer,Transmission Control Protocol,Goodput
Journal
Volume
Issue
ISSN
2012
1
1687-1499
Citations 
PageRank 
References 
22
0.57
23
Authors
5
Name
Order
Citations
PageRank
Elizabeth Rendon-Morales1424.54
Jorge Mata-Díaz210113.33
Juan J. Alins-Delgado3262.96
Jose L. Muñoz428725.68
Oscar Esparza528426.58