CDF may be used to compare Base Station/eNB scheduling algorithms or
compare various radio deployment options or
even compare various design options (say Carrier Aggregation Vs Dual Connectivity, [2] ) !
Below picture shows user throughput for two options.
If we compare cumulative distribution plots, we may infer that Option 1 perform better than Option 2
as higher user throughput is experienced more number of times for Option 1 than Option 2 !.
Fig "User throughput example"
Do check [2] for further examples of CDF in the context of 3GPP.