Summary:
In LTE networks, great emphasis is placed on the Quality of Experience (QoE), a
parameter which is subjective, since the overall experience of the user is
expressed and it can’t be measured with traditional quality of service metrics.
In this dissertation radio scheduling algorithms for the provided Quality of
Experience of LTE networks are examined. At first, there is a short reference
to fundamental notions of LTE networks, especially for these that are related
to the network operation and ensure the expected quality for the user. Then the
scheduling procedure is described as well as the parameters that are taken into
account for the allocation of the resources. Scheduling algorithms that are
available, are being analyzed. The algorithms fit into two categories, those
that take into account the channel quality and those that are independent.
Reference and analysis is made for algorithms from both categories for a wider
perception of the way they work and additionally the aims of their developers
in each case are made clear. The Vienna LTE Simulator is thoroughly described
and simulations have been performed. Additionally, the models used for the
calculation of the QoE are presented. Finally, simulations have been performed,
examining the user’s experience in Video, VoIP and FTP services using the basic
scheduling algorithms, Round Robin, Best CQI, Max TP and Alpha Fair, and
results and conclusions are described.
Keywords:
LTE, SCHEDULING, QoE, VIENNA LTE SIMULATOR, RESOURCE BLOCK
