  Quality of Service (QoS) metrics deal with network quantities, e.g. latency
and loss, whereas Quality of Experience (QoE) provides a proxy metric for
end-user experience. Many papers in the literature have proposed mappings
between various QoS metrics and QoE. This paper goes further in providing
analysis for QoE versus bandwidth cost. We measure QoE using the widely
accepted Mean Opinion Score (MOS) rating. Our results naturally show that
increasing bandwidth increases MOS. However, we extend this understanding by
providing analysis for internet access scenarios, using TCP, and varying the
number of TCP sources multiplexed together. For these target scenarios our
analysis indicates what MOS increase you get by further expenditure on
bandwidth. We anticipate that this will be of considerable value to commercial
organizations responsible for bandwidth purchase and allocation.
