The document discusses key performance indicators (KPIs) for 2G and 3G networks and how top telecom vendors like Ericsson, Huawei, and NSN optimize parameters to improve these KPIs. It outlines techniques for reducing TCH blocking, SD blocking, TCH drop, HOSR, TASR, SD drop, and improving paging success rate through actions like changing configuration parameters, enabling features, addressing hardware issues, and optimizing cells physically. The optimization of these parameters can help maintain balance between network throughput, capacity and radio quality while ensuring a seamless transition between 2G and 3G.

1. 17/6/2014 2G and 3G KPI Improvement by Parameter optimization (NSN, Ericsson, Huawei) | Reckon Talk
When analyzing a 2G network, engineers tend to focus on voice call related issues, such as call
quality, call failures and RF conditions. Engineers emphasize the importance of enhancing
voice call performance mainly by optimizing coverage or attempting to identify the root cause
of voice call failures due to adjacency definition, power control or handover parameter. With
the deployment of 3G networks, engineers must also take notice of network performance
data including maintaining balance between throughput, capacity and radio quality, and also
IRAT (Inter Radio Access Technology Handover), in order to ensure a seamless transition
between 2G and 3G networks.
Following are the key attributes followed by Top
Telecom Vendors like Ericsson, Huawei & NSN for
2G & 3G KPI Improvement by parameter
optimization.
TCH Blocking
If the utilization of a cell is low and its still
having blocking check for hardware issue
For high utilized cell, try changing FRL FRU
Parameters in the cell
Enable Direct Retry in the cell
Enable Traffic based handovers
If still there is blocking add TRXs if configuration is less than 4 in case of ultra/flexi and 6
in case of MR
SD blocking
Increase SDCCH timeslots by monitoring trend of SDCCH blocks vs SDCCH attempts—SD
dimensioning
Increase the Value of HYS at LAC boundary cells
Implement Dynamic SDCCH feature
Implement increased SDCCH capacity feature
Perform physical optimization at LAC boundary cells
TCH drop
Check for frequency hit
Change RLT to 28, ARLT to 44
Try reducing the value of RXP
Change QMRG parameter to 3—check for degradation in DL quality as well
Check for hardware issue
http://www.reckontalk.com/2g-and-3g-kpi-improvement-by-parameter-optimization-nsn-ericsson-huawei/ 1/2

2. 17/6/2014 2G and 3G KPI Improvement by Parameter optimization (NSN, Ericsson, Huawei) | Reckon Talk
Check for MO, MS,HSN
Physically optimize if its a cell specific issue
Check for end to end SYNC BTS,BSC & MSS,MGW
HOSR
Check for the neighbours which are causing degradation in HFR
Delete the neighbour if its unwanted
Check for hardware issue in the target cell
Change the value of SL to -90 and QMRG to 3(check for degradation in DL quality as well)
TASR
Check for the 7745 channel failure alarm. Lock the faulty TRXs/timeslots
Change TRP parameter to 1 and BFG to 2
Follow steps mentioned in TCH blocking KPI if TASR is degraded due to TCH blocking
SD drop
Lock the timeslot which is having high SD drop(in case of channel failure alarm starting
with 02)
Change T200S(BCF level) to 1000
Change RXP to -102
Paging Success Rate
In case of high paging load, perform LAC splitting
Change AT (Repaging attempts)=2, INT(Repaging interval)=500 ms
http://www.reckontalk.com/2g-and-3g-kpi-improvement-by-parameter-optimization-nsn-ericsson-huawei/ 2/2