Management of external interference from all other sites/sectors improves system performance and capacity. Intervention studies are used to examine areas that have significant peripheral interaction problems. Lighting and intervention studies are analysis to determine what sites/sectors of intervention problem (i.e. determining what sites/sectors may be providing too much interference in the field or sites/sectors that do not provide adequate coverage to overcome interference from surrounding sites/sectors).

There are three main methods that can be used to reduce the peripheral intervention in the area. The purpose of these methods is either to increase the signal force of the best serving the site/sector, reducing the signal strength from preventing site/Sector (s), or a combination of both. Several methods to minimize the intervention are as follows:

• Using down-tilt base station antennas to reduce the amount of coverage overlap with adjoining sites and sectors. This will reduce the number of covered area, are experiencing slow CINR.

• Use the 1 x 3 x 3 block group resource reuse sub-pattern to reduce the incidence of peripheral interventions along the borders of the site slightly to boot.

• Selecting a different deployment site layout is better aligned with the 1 x 3 x 1 site posting template reuse.