Basic Principle
According to multiple reuse pattern (MRP), the carriers are divided into several groups. The carries in each group work as an independent layer, and each layer uses a different frequency reuse pattern. During frequency planning, you can configure the carriers layer by layer, with reuse aggressiveness increases layer by layer.
MRP has no special requirement on hardware. It is developed from the concept of carrier layering. That is, the available channel numbers are divided into multiple groups, and each group works as a carrier layer. According to the rules of the aggressive frequency reuse pattern, the channel numbers allocated for each layer are listed in Table:
Channel number allocation for each layer
Layer
|
Channel number
|
BCCH
|
n1
|
TCH 1
|
n2
|
TCH 2
|
n3
|
…
|
…
|
TCHm-1
|
nm
|
Note:
n1 ≥ n2 ≥ n3 ≥ n4 ≥…≥nm.
| |
For MRP, first you must divide an available band into several sub-bands. Generally, the sub-bands work as the bands for BCCH. The reasons are listed below:
