A Resource Management Architecture for Mobile Satellite-based Communication Systems
Dipl.-Inf. Philipp Drieß
Dr.-Ing. Florian Evers
Dipl.-Inf. Markus Brückner
- Today's QoS architectures for packet switched networks, especially reservation-based
architectures such as IntServ, strongly depend on transmission systems with
link characteristics that do not change over time. In wireless network access
technologies however, this requirement makes implementation of QoS challenging
as links change due to effects such as shadowing or fading caused by node mobility.
In this paper a novel cross-layer reservation-based QoS system is presented. It
is able to deal with changing link conditions and notifies the affected
applications with the help of feedback messages. This allows graceful
degradation in compliance with the requirements of the applications.
The architecture presented in this paper focuses on a satellite-based network
for rescue teams during a disaster scenario. Based on a geostationary satellite
this network is characterized by long transmission delays and small link
capacities. The system offers a resource reservation scheme on the physical
layer which is integrated with the approach presented here to design a
cross-layer resource management architecture. This results in a reservation
system for high-latency, low-capacity and unstable links.