Restricting interference through parameter optimisation

Hello All.

We observed high inter-cell interference within the sectors of a LTE site whose orientations are very close to each other.

In such situations, is there any possibility of restricting interference through parameter optimisation?

Enable interference randomization feature.

Try FSS feature.

Is it available in Nokia?

Or this?

Normally the antenna used for mobile tower is having a horizontal bandwidth of 65°.

Is there antenna available with lower horizontal bandwidth?

Yes there are - but they are less common.