2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) reckon talk

KPI

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
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

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2 g and 3g kpi improvement by parameter optimization (nsn, ericsson, huawei) reckon talk

  • 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