21 8 2014
BSC6900 UMTS Product Documentation
Soft Handover Overhead
Table 1 Soft Handover Overhead
KPI Name
Soft Handover Overhead (RNC)
Formula
A1: Number of UEs with 1 RL in the RNC
B1: Number of UEs with 2 RLs in the RNC
C1: Number of UEs with 3 RLs in the RNC
D1: Number of UEs with 4 RLs in the RNC
E1: Number of UEs with 5 RLs in the RNC
F1: Number of UEs with 6 RLs in the RNC.
A1: Number of UEs with 1 RL
B1: Number of UEs with 2 RLs
C1: Number of UEs with 3 RLs
D1: Number of UEs with 4 RLs
E1: Number of UEs with 5 RLs
F1: Number of UEs with 6 RLs.
Description
Associated
Counters
This KPI is used to check the consumption of network resources due to soft handover
in an RNC or a Cell. It considered the radio link quantity during the soft handover.
In the RNC Soft handover ratio, count the mean number of UEs with different quantity
of radio links for RNC from A1 to F1. The RNC periodically samples of the number of
UEs with corresponding radio links in a measurement period. At the end of the
measurement period, the RNC divides the accumulated number by the sampling
times to obtain the soft handover overhead.
The Cell level KPI is only available for cells in a cluster. From A1 to F1 count the
mean number of UEs with different quantity of Radio Links(1~6 radio links) in the Cell
of the active set.
Soft Handover Overhead (RNC) =
{[VS.SHO.AS.1.RNC +
(VS.SHO.AS.2Softer.RNC +
VS.SHO.AS.2Soft.RNC ) x 2 +
(VS.SHO.AS.3Soft2Softer.RNC +
VS.SHO.AS.3Soft.RNC +
VS.SHO.AS.3Softer.RNC ) x 3 +
VS.SHO.AS.4.RNC x 4 +
VS.SHO.AS.5.RNC x 5 +
VS.SHO.AS.6.RNC x 6]/
(VS.SHO.AS.1.RNC+
VS.SHO.AS.2Softer.RNC +
VS.SHO.AS.2Soft.RNC +
VS.SHO.AS.3Soft2Softer.RNC +
VS.SHO.AS.3Soft.RNC +
VS.SHO.AS.3Softer.RNC +
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21 8 2014
BSC6900 UMTS Product Documentation
VS.SHO.AS.4.RNC +
VS.SHO.AS.5.RNC +
VS.SHO.AS.6.RNC ) - 1} x 100%
Soft Handover Overhead (Cell) =
[(VS.SHO.AS.1RL+
VS.SHO.AS.2RL +
VS.SHO.AS.3RL +
VS.SHO.AS.4RL +
VS.SHO.AS.5RL +
VS.SHO.AS.6RL)/
(VS.SHO.AS.1RL+
VS.SHO.AS.2RL/2 +
VS.SHO.AS.3RL/3 +
VS.SHO.AS.4RL/4 +
VS.SHO.AS.5RL/5 +
VS.SHO.AS.6RL/6)-1] x 100%
Object
Unit/Range
Note
RNC, CELL
%
None
Parent topic: Coverage
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