yes, of course, those HO exists.
level HO can behave in two different ways, which have to be chosen by the operator:
– type I (called “Ericsson 1”)
– type II (called “Ericsson 3”) (go figure…)
Ericsson 3 is the simplest : HO “low SS” means the serving cell has low level (DL)
HO ‘High SS” means that serving cell has an “ok” level, but there is a better cell than the serving cell (= better cell HO)
Ericsson 1 = I don’t know. More complicated… and i didn’t learn it yet.