Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE credits
The topic of the current thesis is the reduction of the average packet delay
in two-hop wireless cooperative networks with buffer-aided relays. This type
of networks is of particular interest since it constitutes the building block for
extended networks with multiple hops and numerous relays.
Back-pressure-like algorithms are developed for the HRS and max − link
relay selection schemes. First, an algorithm is developed and applied for both
the HRS and the max − link protocols. It reduces the average delay considerably,
but, in the case of the max − link the diversity of the system is reduced
resulting in higher outage probabilities. For this reason, a new algorithm is developed
that aims at maintaining a high diversity throughout the operation of
the network. Distributed implementations of the algorithms are also discussed.
The performance of the proposed algorithms is illustrated via simulations.
2015. , 76 p.