  Ensuring fair co-existence between unlicensed LTE and WiFi networks is
currently of major concern to both cellular operators and WiFi providers. Two
main unlicensed LTE approaches currently being discussed, namely Carrier Sense
Adaptive Transmission (CSAT) and Listen Before Talk (LBT). While these
mechanisms differ in their compatibility with existing LTE specifications and
regulatory compliance in different countries, they also use fundamentally
different approaches to access the channel. Nevertheless, we show in this
article that when optimally configured both approaches are capable of providing
the same level of fairness to WiFi and that the choice between CSAT and LBT is
solely driven by the LTE operator's interests.
