A Study of Path Selection Algorithms for Mobile Video Streaming QoE

This thesis discusses the problem of path selection for video streaming over 4G mobile networks; its final goal is to devise path selection strategies and test them with a pre-existing network simulator. The objective of path selection algorithms is to optimize both the use of network resources and the Quality of Experience of end users, quantified by various objective metrics. We will propose several path selection algorithms for LTE video transmission, testing them with a simulation in both idealized conditions with perfect knowledge of network parameters and a realistic situation in which the algorithms must use delayed or imperfect information. We will demonstrate that the use of path selection algorithms can improve the Quality of Experience even when taking into account the negative effect of handovers (the switches from one server to another).