Inter-Zone HO = HO between the inner zone and outer zone of a concentric or a multiband cell.
I’ll check that tomorrow.
Regarding hopping, you’re asking a question that often arises from operators.
In alcatel, the hopping (bbh or sfh) is done by hopping on frequencies, not hopping on different TRX.
The MS is on TS 3 of TRX 4, and every TDMA frame, the frequency carried onto this timeslot is changed to a new one.
But the MS stays, physically, located on ts3 of trx4.