Gerhard Hasslinger

TL;DR: This work focuses on the classical Gilbert-Elliott model whose second order statistics is derived over arbitrary time scales and used to fit packet loss processes of traffic traces measured in the IP backbone of Deutsche Telekom.

TL;DR: This paper analyzes the hit rate gain of alternative web caching strategies for the standard independent request model (IRM) within the complete relevant range of three basic system parameters and shows that the IRM analysis is valid for caches with a large user population, although high dynamics tends to reduce the achievable hit rate below theIRM result for smaller user communities.

TL;DR: This work investigates the efficiency of caching as an option to shorten end-to-end paths and delays while at the same time reducing traffic loads and shows that least recently used (LRU) essentially differs from caching strategies based on access statistics in terms of the achievable hit rates.

TL;DR: It is shown that caching for video streaming can benefit from the proposed look-ahead technique, when replacement decisions can be partly revised due to new requests being encountered during long lasting content updates.

TL;DR: This work investigates multiplexers in telecommunication systems with a workload process developing equivalent to that of a service system with semi-Markovian input, which includes fluid flow and time slotted systems and achieves clear conclusions about the statistical multiplexing gain with regard to bounds on loss rates as demanded in quality-of-service guarantees.