Yes, 150 times, the best candidate is congested. But it doesn’t mean the HO itself is *failed* for the MS. It is highly probable the HO was sucessful towards another candidate.
So exactly, it works like this :
every time the BSC finds one “best” candidate, the HO REQUEST increments by 1.
every time the current candidate is “congested”, the HO rejected due to congestion increments by one
… so the 2nd candidate will be counted as a new HO Request.