Channel Allocation In a Concentric Cell

? BSC allocate a channel in the same way in handover and assignment procedure when Assign(handover) optimum Layer is system optimization.

? There are 5 parameters :

§ Assign to Overlayer RxLev Offset(dB)

§ Handover to overlayer RxLev Offset(dB)

§ UtoO HO Received Level Threshold

§ OtoU HO Received Level Threshold

§ Assign-optimum-level Threshold

? For explain the channel allocate easily, we define 2 thresholds.

? In handover case:

? Threshold A = UtoO HO Received Level Threshold + (Handover to Underlayer RxLev Offset - 31)

? Threshold B = UtoO HO Received Level Threshold

? In assignment case:

? Threshold A = OtoU HO Received Level Threshold + (Assign to Overlayer RxLev Offset - 31)

         ? Threshold B = Assign-optimum-level Threshold

If  receive level <Threshold A, it only can use 900M,if 900M congestion, then system will reject to allocate channel.

If Threshold A < = receive level <=Threshold B, it will select 900M first, if 900M congestion, then system will select channel in 1800M.

If  receive level >Threshold B, it will select 1800M first, if 1800M congestion, then system will select channel in 900M.

Very informative and useful.

need more elaboration..

Very Very Nice Doc.. 

useful document, thanks