mania,
amazing idea ! however, in alu, this problem was always taken into account (at least since B6) : a TRX hopping on only one frequency is considered as ‘not hopping’
(i just checked it, and the B6 document says :
If the channel is hopping only on the BCCH frequency (after a transmitter failure), it is considered as a non-
hopping channel and it is concerned by the non frequency hopping case. )