SHO overhead

[nabil el haddani]

Hi experts,

I'm working on SHO overhead optimisation on UMTS900 and UMTS2100 layers; I have a lot of cells with excessive SHO overhead; For rural sites, i can apply more downtilt to reduce the SHO area; for urban and dense urban sites i have the same problem but i can't downtilt because the tilt is already 8, 9 or 10, i thought about reducing the Active set size to 2 but it's not good idea cuz i will loose SHO gain..

Can anyone light my way with some good ideas in order to optimise to the normal range which is 30%-40% and share some experience related to this task.

Br

Nabil

[desi_larka]

Nabil

i am assuming u have the right sorts of neighbours defined. there are a few ways to acheive this

You could increase your threshold for adding which would avoid weak radio legs, you could change hystersis which would also do similar thing. There are also priorities defined for the neighbous so you could do that.

BTW having more than 3 RL would it give you much SHO gain anyways ? i doubt it

[nabil el haddani]

Thanks for your answer, i already tried that but in vain!

Do u know how to implement prorities for neighbours with NSN vendor?

I know that in ZTE but NSN i should dig in

Br,

Nabil

[wolverine]

Have you examined the possibility of reducing the power of the pilot channel (CPICH)? This is usually the second step if downtilting doesn't work/isn't possible.

[nabil el haddani]

It's a risky solution man

[roamR]

How high is the antenna height for urban area and dense urban implemented?
Physical changes such as lowering the antenna height also might help.

[gprastomo]

Hi,

Reducing the SHO, its better to apply to antenna downtilt for the cells which we dont want to serve, or if you want to make it difficult SHO for specific neighbour you can apply Cell Individual Offset or EcNo Offset for that neighbour.

br

[nabil el haddani]

Hi guys,

I realised that mostly all U900 cells have SHO overhead higher than 50%; seems global problem.

Anyone have an idea.

Thank u guys

[gprastomo]

Do you work on U900-2100 SHO or separately ?

[nabil el haddani]

I'm working on U9-U21 together, what's the effect?