CS RAB Failure Due to DL Power Congestion - Improved by Changing DLALGOWSWITCH Parameter

Report for CS RAB Failure due to DL Power Congestion and Improved by changing DLALGOSWITCH OFF Parameter

Detail Analysis: In Meteor RNC on Mosaic project CS RAB get bad of 1 Site, So to improve DLALGOWSITCH OFF parameter changed and due to change>> CS RAB get OK. 0.1

Failures Reason Analysis Analyse the counter related to CS RABs and it is found that many call are failing on

counter : >> Number of Failed CS RAB Establishments for Cell (DL Power Congestion) (none) <<<< On 1 particular Cell >> Balliguille Hill_1 This counter means that there is DL power congestion in the downlink. Pre KPI attached attached for refernece of Balligullie Hill _1

Cluster Name

Start time

Call

Number of

Setup

Failed CS RAB

Success

Establishments

Rate(CS)

for Cell (DL Power Congestion) (none)

BallyguileHill_MMC_F1_1 BallyguileHill_MMC_F2_1 BallyguileHill_MMC_F1_1 BallyguileHill_MMC_F2_1 BallyguileHill_MMC_F1_1 BallyguileHill_MMC_F2_1 BallyguileHill_MMC_F1_1 BallyguileHill_MMC_F1_1 BallyguileHill_MMC_F1_1

11/28/2012 18:00 11/28/2012 19:00 11/28/2012 19:00 11/28/2012 20:00 11/28/2012 20:00 11/28/2012 21:00 11/28/2012 21:00 11/28/2012 22:00 11/28/2012 23:00

98.02% 97.17% 96.37% 97.00% 96.87% 96.99% 96.37% 98.00% 99.48%

44 3 17 2 14 3 13 1 2

0.2

Action Taken to Improve:

To Improve DL Power congestion>> 1 parameter related to CAC Algorithm is changed: Make DL CAC Algorithm Switch >>>> OFF >>>from>>> Algorithm First state

DESCRIPTION OF PARAMETER: 1. In OFF condition : DL CAC algorithm is disable. 2. In Algorithm First condition: The load factor prediction is ON.

If Algorithm first applied than after reaching load factor, new calls are rejected. While if we disable it than it can take new call. We make it OFF most of the time at the time of more load on site, while Algorithm First is used when we have more sites nearby and reaching certain load/threshold, it can transfer calls to near by BTS

0.3

1.3 KPI Analysed : KPI analysed after cahnge and Improvement found : KPI ATTACHED for refernece:

Cluster Name

Start time

Call Setup

Number of Failed

Success

CS RAB

Rate(CS)

Establishments for Cell (DL Power Congestion) (none)

BallyguileHill_MMC_F1 _1 BallyguileHill_MMC_F1 _2 BallyguileHill_MMC_F1 _1 BallyguileHill_MMC_F1 _2 BallyguileHill_MMC_F1 _1 BallyguileHill_MMC_F1 _2 BallyguileHill_MMC_F1 _1 BallyguileHill_MMC_F1 _2 BallyguileHill_MMC_F1 _1 BallyguileHill_MMC_F1 _2 BallyguileHill_MMC_F1 _1 BallyguileHill_MMC_F1 _2

11/30/2012 18:00 11/30/2012 18:00 11/30/2012 19:00 11/30/2012 19:00 11/30/2012 20:00 11/30/2012 20:00 11/30/2012 21:00 11/30/2012 21:00 11/30/2012 22:00 11/30/2012 22:00 11/30/2012 23:00 11/30/2012 23:00

99.42%

0

100.00%

0

99.65%

0

100.00%

0

99.75%

0

100.00%

0

99.04%

0

100.00%

0

99.60%

0

100.00%

0

99.58%

0

100.00%

0

1.4 DL Power congestion problem get resolved after changing this parameter