Providing Relative Service Differentiation to TCP Flows over Split-TCP Geostationary Bandwidth on Demand Satellite Networks

Authors:
Wei Koong Chai;Merkourios Karaliopoulos;George Pavlou
Affiliations:
Centre for Communication Systems Research, University of Surrey, GU2 7XH, UK;Department of Computer Science, University of North Carolina, Chapel Hill, USA;Centre for Communication Systems Research, University of Surrey, GU2 7XH, UK
Venue:
WWIC '07 Proceedings of the 5th international conference on Wired/Wireless Internet Communications
Year:
2007

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Abstract

We propose a combined transport --- medium access control (MAC) layer scheme to provide relativeservice differentiation to Transmission Control Protocol (TCP) flows over a geostationary (GEO) bandwidth on demand (BoD) satellite networks. Our approach involves the joint configuration of TCP-Performance Enhancing Proxy (TCP-PEP) agents at the transport layer and the scheduling algorithm controlling the resource allocation at the MAC layer. The scheme is independent of the TCP variant used in the network. Extensive simulation results show that the two mechanisms exhibit complementary behavior in achieving the desired differentiation throughout the traffic load space: the TCP-PEP agents control differentiation at low system utilization, whereas the MAC scheduler becomes the dominant differentiation factor at high load.