2G Optimization Trial Report

1 © Nokia Siemens Networks Globe Telecom / Gagan Bhasin / 08th Feb 2010Customer Presentation

Globe TelecomOptimization Trial Results


Index

1. HR Reduction by CTC2. SDCCH Drop Rate Improvement by T200S3. TCH/SDCCH Drop Rate improvement by DL Dtx4. SDCCH Blocking/Drop Rate improvement by RET/SLO5. SDCCH Blocking reduction by T31226. Interference HO Results


Half Rate Reduction

CTC changed from 0 to 223% HR reduction across Bambang BSC.

Full/Half rate==============Full rate TCH time .........................../trf_56 8324 hr ( 83.32 %)Half rate TCH time .........................../trf_57 1666 hr ( 16.68 %)

Full rate time congestion .................../cngt_3a ( 0.12 %)Half rate time congestion .................../cngt_4a ( 0.26 %)

Note: For a cell level list, run report 236.

non-AMR/AMR=============Non-AMR TCH time ............................/trf_115 9508 hr ( 100.00 %)AMR TCH time ................................/trf_116 0 hr ( 0.00 %). Full rate ................................/trf_117 0 hr ( 0.00 %). Half rate ................................/trf_118 0 hr ( 0.00 %)





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Half Rate Reduction

CTC changed from 0 to 219% HR reduction across ONEBEVERLY BSC.









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Half Rate Reduction

CTC changed from 0 to 230% HR reduction across PIONEER BSC.









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SDCCH Drop Reduction

T200S changed from 0 to 780msec18.5% reduction in SDCCH drop Rate across SUSANA1 BSC

SDCCH failures==============SDCCH seizures .............................../trf_54 4354258SDCCH drop ratio ............................./sdr_1a 9.19 %. SDCCH_RADIO_FAIL............................./c1003 76504 ( 1.76 %). SDCCH_A_IF_FAIL_CALL........................./c1078 1691 ( 0.04 %). SDCCH_ABIS_FAIL_CALL........................./c1075 322034 ( 7.40 %). SDCCH_USER_ACT.............................../c1037 0 ( 0.00 %). SDCCH_BCSU_RESET............................./c1038 0 ( 0.00 %). SDCCH_NETW_ACT.............................../c1039 49 ( 0.00 %). SDCCH_BTS_FAIL.............................../c1036 0 ( 0.00 %). SDCCH_LAPD_FAIL............................../c1035 41 ( 0.00 %). SDCCH_RF_OLD_HO........(HO drop)............./c1004 40 ( 0.00 %). SDCCH_ABIS_FAIL_OLD....(HO drop)............./c1076 0 ( 0.00 %). SDCCH_A_IF_FAIL_OLD....(HO drop)............./c1079 8 ( 0.00 %)

T3101 expired (S7) .........................../c57020 276792 ( 6.36 %). (denominator in % calculation is same as above)

SDCCH failures==============SDCCH seizures .............................../trf_54 5467512SDCCH drop ratio ............................./sdr_1a 10.71 %. SDCCH_RADIO_FAIL............................./c1003 119399 ( 2.18 %). SDCCH_A_IF_FAIL_CALL........................./c1078 1230 ( 0.02 %). SDCCH_ABIS_FAIL_CALL........................./c1075 464811 ( 8.50 %). SDCCH_USER_ACT.............................../c1037 43 ( 0.00 %). SDCCH_BCSU_RESET............................./c1038 0 ( 0.00 %). SDCCH_NETW_ACT.............................../c1039 1 ( 0.00 %). SDCCH_BTS_FAIL.............................../c1036 0 ( 0.00 %). SDCCH_LAPD_FAIL............................../c1035 87 ( 0.00 %). SDCCH_RF_OLD_HO........(HO drop)............./c1004 4 ( 0.00 %). SDCCH_ABIS_FAIL_OLD....(HO drop)............./c1076 0 ( 0.00 %). SDCCH_A_IF_FAIL_OLD....(HO drop)............./c1079 0 ( 0.00 %)

T3101 expired (S7) .........................../c57020 439908 ( 8.05 %). (denominator in % calculation is same as above)

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Downlink DTx Activated : TCH/SDCCH Drop Rate Improved – BSC-MANILA2SDCCH failures==============SDCCH seizures .............................../trf_54 6482352SDCCH drop ratio ............................./sdr_1a 9.40 %. SDCCH_RADIO_FAIL............................./c1003 133397 ( 2.06 %). SDCCH_A_IF_FAIL_CALL........................./c1078 1619 ( 0.02 %). SDCCH_ABIS_FAIL_CALL........................./c1075 473987 ( 7.31 %). SDCCH_USER_ACT.............................../c1037 0 ( 0.00 %). SDCCH_BCSU_RESET............................./c1038 0 ( 0.00 %). SDCCH_NETW_ACT.............................../c1039 0 ( 0.00 %). SDCCH_BTS_FAIL.............................../c1036 7 ( 0.00 %). SDCCH_LAPD_FAIL............................../c1035 254 ( 0.00 %). SDCCH_RF_OLD_HO........(HO drop)............./c1004 15 ( 0.00 %). SDCCH_ABIS_FAIL_OLD....(HO drop)............./c1076 0 ( 0.00 %). SDCCH_A_IF_FAIL_OLD....(HO drop)............./c1079 1 ( 0.00 %)T3101 expired (S7) .........................../c57020 445870 ( 6.88 %)

SDCCH failures==============SDCCH seizures .............................../trf_54 6508115SDCCH drop ratio ............................./sdr_1a 8.88 %. SDCCH_RADIO_FAIL............................./c1003 109581 ( 1.68 %). SDCCH_A_IF_FAIL_CALL........................./c1078 1418 ( 0.02 %). SDCCH_ABIS_FAIL_CALL........................./c1075 466567 ( 7.17 %). SDCCH_USER_ACT.............................../c1037 0 ( 0.00 %). SDCCH_BCSU_RESET............................./c1038 0 ( 0.00 %). SDCCH_NETW_ACT.............................../c1039 0 ( 0.00 %). SDCCH_BTS_FAIL.............................../c1036 0 ( 0.00 %). SDCCH_LAPD_FAIL............................../c1035 333 ( 0.01 %). SDCCH_RF_OLD_HO........(HO drop)............./c1004 7 ( 0.00 %). SDCCH_ABIS_FAIL_OLD....(HO drop)............./c1076 0 ( 0.00 %). SDCCH_A_IF_FAIL_OLD....(HO drop)............./c1079 1 ( 0.00 %)T3101 expired (S7) .........................../c57020 439304 ( 6.75 %)

TCH failures============TCH drop call ratio after TCH seizure. before re-establisment....................../dcr_3i 2.02 %. TCH_RADIO_FAIL............................../c1013 4955 ( 1.24 %). TCH_ABIS_FAIL_CALL........................../c1084 1119 ( 0.28 %). TCH_A_IF_FAIL_CALL........................../c1087 3 ( 0.00 %). TCH_TR_FAIL................................./c1029 14 ( 0.00 %). TCH_USER_ACT................................/c1048 0 ( 0.00 %). TCH_BCSU_RESET............................../c1049 0 ( 0.00 %). TCH_NETW_ACT................................/c1050 1 ( 0.00 %). TCH_ACT_FAIL_CALL.........................../c1081 3 ( 0.00 %). TCH_BTS_FAIL................................/c1047 6 ( 0.00 %). TCH_LAPD_FAIL.............................../c1046 184 ( 0.05 %). TCH_RF_OLD_HO.......(HO drop).............../c1014 1580 ( 0.39 %). TCH_ABIS_FAIL_OLD...(HO drop).............../c1085 5 ( 0.00 %). TCH_A_IF_FAIL_OLD...(HO drop).............../c1088 225 ( 0.06 %). TCH_TR_FAIL_OLD.....(HO drop).............../c1030 2 ( 0.00 %). after re-establisment......................./dcr_3j 2.02 %T3101 expired (S9) .........................../c57038 0 ( 0.00 %)

TCH failures============TCH drop call ratio after TCH seizure. before re-establisment....................../dcr_3i 1.88 %. TCH_RADIO_FAIL............................../c1013 4284 ( 1.18 %). TCH_ABIS_FAIL_CALL........................../c1084 880 ( 0.24 %). TCH_A_IF_FAIL_CALL........................../c1087 2 ( 0.00 %). TCH_TR_FAIL................................./c1029 20 ( 0.01 %). TCH_USER_ACT................................/c1048 0 ( 0.00 %). TCH_BCSU_RESET............................../c1049 0 ( 0.00 %). TCH_NETW_ACT................................/c1050 2 ( 0.00 %). TCH_ACT_FAIL_CALL.........................../c1081 0 ( 0.00 %). TCH_BTS_FAIL................................/c1047 1 ( 0.00 %). TCH_LAPD_FAIL.............................../c1046 167 ( 0.05 %). TCH_RF_OLD_HO.......(HO drop).............../c1014 1316 ( 0.36 %). TCH_ABIS_FAIL_OLD...(HO drop).............../c1085 2 ( 0.00 %). TCH_A_IF_FAIL_OLD...(HO drop).............../c1088 165 ( 0.05 %). TCH_TR_FAIL_OLD.....(HO drop).............../c1030 0 ( 0.00 %). after re-establisment......................./dcr_3j 1.88 %T3101 expired (S9) .........................../c57038 0 ( 0.00 %)

•30% reduction in SDCCH droop due to RF

•9.5% reduction TCH drop due to RF losses

•9.2% reduction in TCH drop due to HO failure


Downlink DTx Activated : TCH/SDCCH Drop Rate Improved – BSC-MANILA2Causes:UL quality...................................../c4023 36491 ( 7.10 %)UL level......................................./c4024 117327 ( 22.81 %)DL quality...................................../c4025 83262 ( 16.19 %)DL level......................................./c4026 10415 ( 2.03 %)Distance ....................................../c4027 0 ( 0.00 %)MSC invocation (traffic reason) .............../c4028 0 ( 0.00 %)UL interference .............................../c4029 0 ( 0.00 %)DL interference .............................../c4030 0 ( 0.00 %)Umbrella ....................................../c4031 0 ( 0.00 %)Pbdgt ........................................./c4032 230739 ( 44.87 %)OMC (forced by user) ........................../c4033 45 ( 0.01 %)Directed retry ................................/c4079 1606 ( 0.31 %)Pre-emption .................................../c4086 400 ( 0.08 %)BSC controlled TRHO (S8)......................./c4035 7115 ( 0.00 %)DADLB (S8)...................................../c4129 0 ( 0.00 %)GPRS (S9)....................................../c4130 26867 ( 5.22 %)HSCSD (S10)..................................../c4141 0 ( 0.00 %)

Causes:UL quality...................................../c4023 38362 ( 7.15 %)UL level......................................./c4024 128767 ( 24.00 %)DL quality...................................../c4025 74499 ( 13.89 %)DL level......................................./c4026 10418 ( 1.94 %)Distance ....................................../c4027 0 ( 0.00 %)MSC invocation (traffic reason) .............../c4028 0 ( 0.00 %)UL interference .............................../c4029 0 ( 0.00 %)DL interference .............................../c4030 0 ( 0.00 %)Umbrella ....................................../c4031 0 ( 0.00 %)Pbdgt ........................................./c4032 250114 ( 46.62 %)OMC (forced by user) ........................../c4033 9 ( 0.00 %)Directed retry ................................/c4079 1559 ( 0.29 %)Pre-emption .................................../c4086 413 ( 0.08 %)BSC controlled TRHO (S8)......................./c4035 5261 ( 0.00 %)DADLB (S8)...................................../c4129 0 ( 0.00 %)GPRS (S9)....................................../c4130 27038 ( 5.04 %)HSCSD (S10)..................................../c4141 0 ( 0.00 %)

Drops per erlang, before re-establishment ..../dcr_10b 1.02 Drops per erlang, before re-establishment ..../dcr_10 0.83

•14% reduction handover due to Poor DL Rx_Quality


Downlink DTx Activated : TCH/SDCCH Drop Rate Improved– BSC-MANILA3SDCCH failures==============SDCCH seizures .............................../trf_54 2876243SDCCH drop ratio ............................./sdr_1a 6.71 %. SDCCH_RADIO_FAIL............................./c1003 32376 ( 1.13 %). SDCCH_A_IF_FAIL_CALL........................./c1078 487 ( 0.02 %). SDCCH_ABIS_FAIL_CALL........................./c1075 160078 ( 5.57 %). SDCCH_USER_ACT.............................../c1037 0 ( 0.00 %). SDCCH_BCSU_RESET............................./c1038 0 ( 0.00 %). SDCCH_NETW_ACT.............................../c1039 0 ( 0.00 %). SDCCH_BTS_FAIL.............................../c1036 3 ( 0.00 %). SDCCH_LAPD_FAIL............................../c1035 16 ( 0.00 %). SDCCH_RF_OLD_HO........(HO drop)............./c1004 2 ( 0.00 %). SDCCH_ABIS_FAIL_OLD....(HO drop)............./c1076 0 ( 0.00 %). SDCCH_A_IF_FAIL_OLD....(HO drop)............./c1079 2 ( 0.00 %)T3101 expired (S7) .........................../c57020 151050 ( 5.25 %)


TCH failures============TCH drop call ratio after TCH seizure. before re-establisment....................../dcr_3i 1.57 %. TCH_RADIO_FAIL............................../c1013 3527 ( 1.17 %). TCH_ABIS_FAIL_CALL........................../c1084 414 ( 0.14 %). TCH_A_IF_FAIL_CALL........................../c1087 3 ( 0.00 %). TCH_TR_FAIL................................./c1029 12 ( 0.00 %). TCH_USER_ACT................................/c1048 0 ( 0.00 %). TCH_BCSU_RESET............................../c1049 0 ( 0.00 %). TCH_NETW_ACT................................/c1050 0 ( 0.00 %). TCH_ACT_FAIL_CALL.........................../c1081 0 ( 0.00 %). TCH_BTS_FAIL................................/c1047 0 ( 0.00 %). TCH_LAPD_FAIL.............................../c1046 15 ( 0.00 %). TCH_RF_OLD_HO.......(HO drop).............../c1014 616 ( 0.21 %). TCH_ABIS_FAIL_OLD...(HO drop).............../c1085 0 ( 0.00 %). TCH_A_IF_FAIL_OLD...(HO drop).............../c1088 141 ( 0.05 %). TCH_TR_FAIL_OLD.....(HO drop).............../c1030 0 ( 0.00 %). after re-establisment......................./dcr_3j 1.57 %


•6.5% reduction in SDCCH droop due to RF

•8% rise in TCH drop due to RF losses. This is only due to Hardware issue at one cell.

•9% reduction in TCH drop due to HO failure


Downlink DTx Activated : TCH/SDCCH Drop Rate Improved – BSC-MANILA3Causes:UL quality...................................../c4023 14199 ( 4.94 %)UL level......................................./c4024 73600 ( 25.61 %)DL quality...................................../c4025 27437 ( 9.55 %)DL level......................................./c4026 9226 ( 3.21 %)Distance ....................................../c4027 0 ( 0.00 %)MSC invocation (traffic reason) .............../c4028 0 ( 0.00 %)UL interference .............................../c4029 458 ( 0.16 %)DL interference .............................../c4030 74 ( 0.03 %)Umbrella ....................................../c4031 0 ( 0.00 %)Pbdgt ........................................./c4032 140784 ( 48.98 %)OMC (forced by user) ........................../c4033 20 ( 0.01 %)Directed retry ................................/c4079 250 ( 0.09 %)Pre-emption .................................../c4086 120 ( 0.04 %)BSC controlled TRHO (S8)......................./c4035 2276 ( 0.00 %)DADLB (S8)...................................../c4129 0 ( 0.00 %)GPRS (S9)....................................../c4130 18969 ( 6.60 %)HSCSD (S10)..................................../c4141 0 ( 0.00 %)


TCH===TCH availability (speech and GPRS)............/ava_1d 99.78 %

TCH===TCH availability (speech and GPRS)............/ava_1d 99.08 %


•TCH Availability has reduced probably due to Locked/Faulty TRx and caused the limited improvement.


Downlink DTx Activated : TCH/SDCCH Drop Rate Improved – BSC-BAMBANGSDCCH failures==============SDCCH seizures .............................../trf_54 10526094SDCCH drop ratio ............................./sdr_1a 5.39 %. SDCCH_RADIO_FAIL............................./c1003 124084 ( 1.18 %). SDCCH_A_IF_FAIL_CALL........................./c1078 1408 ( 0.01 %). SDCCH_ABIS_FAIL_CALL........................./c1075 440245 ( 4.18 %). SDCCH_USER_ACT.............................../c1037 0 ( 0.00 %). SDCCH_BCSU_RESET............................./c1038 0 ( 0.00 %). SDCCH_NETW_ACT.............................../c1039 0 ( 0.00 %). SDCCH_BTS_FAIL.............................../c1036 0 ( 0.00 %). SDCCH_LAPD_FAIL............................../c1035 1636 ( 0.02 %). SDCCH_RF_OLD_HO........(HO drop)............./c1004 0 ( 0.00 %). SDCCH_ABIS_FAIL_OLD....(HO drop)............./c1076 0 ( 0.00 %). SDCCH_A_IF_FAIL_OLD....(HO drop)............./c1079 0 ( 0.00 %)T3101 expired (S7) .........................../c57020 397756 ( 3.78 %)




•6.5% reduction in SDCCH droop due to RF

•11.2% reduction TCH drop due to RF losses


Downlink DTx Activated : TCH/SDCCH Drop Rate Improved – BSC-BAMBANGCauses:UL quality...................................../c4023 38330 ( 8.02 %)UL level......................................./c4024 141140 ( 29.55 %)DL quality...................................../c4025 52050 ( 10.90 %)DL level......................................./c4026 12285 ( 2.57 %)Distance ....................................../c4027 0 ( 0.00 %)MSC invocation (traffic reason) .............../c4028 0 ( 0.00 %)UL interference .............................../c4029 14 ( 0.00 %)DL interference .............................../c4030 168 ( 0.04 %)Umbrella ....................................../c4031 356 ( 0.07 %)Pbdgt ........................................./c4032 175956 ( 36.84 %)OMC (forced by user) ........................../c4033 14 ( 0.00 %)Directed retry ................................/c4079 1311 ( 0.27 %)Pre-emption .................................../c4086 167 ( 0.03 %)BSC controlled TRHO (S8)......................./c4035 4097 ( 0.00 %)DADLB (S8)...................................../c4129 0 ( 0.00 %)GPRS (S9)....................................../c4130 51760 ( 10.84 %)HSCSD (S10)..................................../c4141 0 ( 0.00 %)


Drops per erlang, before re-establishment ..../dcr_10 0.78


Drops per erlang, before re-establishment ..../dcr_10 0.67



•30% reduction in HR due to CTC = 2 change.

•This has increase the RF air utilization still due to DL Dtx RF Losses are improved.


SDCCH Blocking Reduction

No significant change as there was not any SDCCH Blocking before also.A BSC with high SDCCH Blocking shall be trialed out.Despite low SDCCH availability there isn't much rise in SDCCH Blocking Rate

SDCCH=====SDCCH availability ............................/ava_4 95.57 %Dynamic SDCCH allocation (TCH reconfigured to SDCCH):. Attempts ..................................../c1154 39Note: For a cell level list, run report 139.

SDCCH requests ................................/c1000 4933323. HO in......................................../c1006 1 ( 0.00 %). blocked ........................./blck_15 (blck_5a) 1509 ( 0.03 %). To FACCH call setup ........................./c1099 0 ( 0.00 %). LU ........................................../c3019 1480770 ( 30.02 %). MTC (incl. SMS) ............................./c3012 1431852 ( 29.02 %). MOC (incl. SMS,SS) ........................../c3013 1724252 ( 34.95 %). supplementary service request (S9) ......../c3044 37478 ( 0.76 %). IMSI detach (S7) ............................/c3033 35691 ( 0.72 %). call re-establishment......................../c3020 0 ( 0.00 %). emergency call ............................../c3021 540 ( 0.01 %). other (fails, ghosts) ......................./sd_1a 258708 ( 5.24 %)

SDCCH usage ................................../trf_7b 8.45 %

Average SDCCH seizure length ................../trf_4 4.39 sec

SDCCH=====SDCCH availability ............................/ava_4 99.63 %Dynamic SDCCH allocation (TCH reconfigured to SDCCH):. Attempts ..................................../c1154 72Note: For a cell level list, run report 139.

SDCCH requests ................................/c1000 5199226. HO in......................................../c1006 3 ( 0.00 %). blocked ........................./blck_15 (blck_5a) 226 ( 0.00 %). To FACCH call setup ........................./c1099 0 ( 0.00 %). LU ........................................../c3019 1502197 ( 28.89 %). MTC (incl. SMS) ............................./c3012 1513420 ( 29.11 %). MOC (incl. SMS,SS) ........................../c3013 1793387 ( 34.49 %). supplementary service request (S9) ......../c3044 35375 ( 0.68 %). IMSI detach (S7) ............................/c3033 35822 ( 0.69 %). call re-establishment......................../c3020 0 ( 0.00 %). emergency call ............................../c3021 586 ( 0.01 %). other (fails, ghosts) ......................./sd_1a 353585 ( 6.80 %)

SDCCH usage ................................../trf_7b 9.09 %

Average SDCCH seizure length ................../trf_4 4.41 sec

Pre Post


SDCCH=====SDCCH availability ............................/ava_4 99.97 %Dynamic SDCCH allocation (TCH reconfigured to SDCCH):. Attempts ..................................../c1154 19Note: For a cell level list, run report 139.SDCCH requests ................................/c1000 541553. HO in......................................../c1006 0 ( 0.00 %). blocked ........................./blck_15 (blck_5a) 10438 ( 1.93 %). To FACCH call setup ........................./c1099 0 ( 0.00 %). LU ........................................../c3019 138832 ( 25.64 %). MTC (incl. SMS) ............................./c3012 163809 ( 30.25 %). MOC (incl. SMS,SS) ........................../c3013 201302 ( 37.17 %). supplementary service request (S9) ......../c3044 3913 ( 0.72 %). IMSI detach (S7) ............................/c3033 3275 ( 0.60 %). call re-establishment......................../c3020 0 ( 0.00 %). emergency call ............................../c3021 28 ( 0.01 %). other (fails, ghosts) ......................./sd_1a 23869 ( 4.41 %)SDCCH usage ................................../trf_7b 17.31 %Average SDCCH seizure length ................../trf_4 4.43 sec

Rach Re-attempt waiting timer changed from 10 to 32 Rach period. RACH re- attempts reduced from 4 to 1.Improved SDCCH Blocking Rate though the SDCCH traffic was lesser post changes

SDCCH=====SDCCH availability ............................/ava_4 99.79 %Dynamic SDCCH allocation (TCH reconfigured to SDCCH):. Attempts ..................................../c1154 7Note: For a cell level list, run report 139.SDCCH requests ................................/c1000 431435. HO in......................................../c1006 1 ( 0.00 %). blocked ........................./blck_15 (blck_5a) 52 ( 0.01 %). To FACCH call setup ........................./c1099 0 ( 0.00 %). LU ........................................../c3019 125957 ( 29.19 %). MTC (incl. SMS) ............................./c3012 132189 ( 30.64 %). MOC (incl. SMS,SS) ........................../c3013 157781 ( 36.57 %). supplementary service request (S9) ......../c3044 2534 ( 0.59 %). IMSI detach (S7) ............................/c3033 2790 ( 0.65 %). call re-establishment......................../c3020 0 ( 0.00 %). emergency call ............................../c3021 25 ( 0.01 %). other (fails, ghosts) ......................./sd_1a 12640 ( 2.93 %)SDCCH usage ................................../trf_7b 14.14 %Average SDCCH seizure length ................../trf_4 4.44 sec

Improved SDCCH Success Rate : Increased Rach Re-attempt waiting Period


Improved SDCCH Success Rate : Increased Rach Re-attempt waiting PeriodSDCCH failures==============SDCCH seizures .............................../trf_54 531115SDCCH drop ratio ............................./sdr_1a 5.92 %. SDCCH_RADIO_FAIL............................./c1003 6470 ( 1.22 %). SDCCH_A_IF_FAIL_CALL........................./c1078 119 ( 0.02 %). SDCCH_ABIS_FAIL_CALL........................./c1075 24844 ( 4.68 %). SDCCH_USER_ACT.............................../c1037 0 ( 0.00 %). SDCCH_BCSU_RESET............................./c1038 0 ( 0.00 %). SDCCH_NETW_ACT.............................../c1039 0 ( 0.00 %). SDCCH_BTS_FAIL.............................../c1036 15 ( 0.00 %). SDCCH_LAPD_FAIL............................../c1035 0 ( 0.00 %). SDCCH_RF_OLD_HO........(HO drop)............./c1004 0 ( 0.00 %). SDCCH_ABIS_FAIL_OLD....(HO drop)............./c1076 0 ( 0.00 %). SDCCH_A_IF_FAIL_OLD....(HO drop)............./c1079 0 ( 0.00 %)T3101 expired (S7) .........................../c57020 23141 ( 4.36 %)

SDCCH success rate has improved by 31%.



Interference Handover Activation : PARCROYALE

RF Loss + RF Loss HO : Pre = 1.23% Post = 1.01% (Improved by 18%)Drops per erlang : Pre = 0.60 Post = 0.65 (improved by 9%)Traffic : Pre = 4327 Post = 4609 (Traffic increased by 7%)

TCH failures============TCH drop call ratio after TCH seizure. before re-establisment....................../dcr_3i 1.47 %. TCH_RADIO_FAIL............................../c1013 1600 ( 0.87 %). TCH_ABIS_FAIL_CALL........................../c1084 299 ( 0.16 %). TCH_A_IF_FAIL_CALL........................../c1087 0 ( 0.00 %). TCH_TR_FAIL................................./c1029 5 ( 0.00 %). TCH_USER_ACT................................/c1048 4 ( 0.00 %). TCH_BCSU_RESET............................../c1049 0 ( 0.00 %). TCH_NETW_ACT................................/c1050 0 ( 0.00 %). TCH_ACT_FAIL_CALL.........................../c1081 0 ( 0.00 %). TCH_BTS_FAIL................................/c1047 1 ( 0.00 %). TCH_LAPD_FAIL.............................../c1046 0 ( 0.00 %). TCH_RF_OLD_HO.......(HO drop).............../c1014 655 ( 0.36 %). TCH_ABIS_FAIL_OLD...(HO drop).............../c1085 1 ( 0.00 %). TCH_A_IF_FAIL_OLD...(HO drop).............../c1088 139 ( 0.08 %). TCH_TR_FAIL_OLD.....(HO drop).............../c1030 0 ( 0.00 %). after re-establisment......................./dcr_3j 1.47 %T3101 expired (S9) .........................../c57038 0 ( 0.00 %)TCH drop call ratio after TCH assignment. before re-establishment .................../dcr_8e 0.00 %. after re-establishment ..................../dcr_8c 0.00 %Dropped conversation ratio .................../dcr_5b 1.31 %Drops per erlang, before re-establishment ..../dcr_10 0.60Drops per erlang, after re-establishment ..../dcr_10b 0.60


Pre Post


HO drop ratio ................................/hfr_68 0.22 %Total HO failure ............................../hfr_2 1.86 %. HO failure due to blocking ................./hfr_55 0.14 %Outgoing MSC ctrl HO attempts ................../ho_9 56734. Successes ................................./c4004 54298 ( 95.71 %). Failures ................................./hof_6a 2436 ( 4.29 %). MSC ctrl ho not allowed ................./c4037 2 ( 0.00 %). Blocked ................................./c4055 78 ( 0.14 %). Return to old .........................../c4006 1903 ( 3.35 %). End of HO ............................../c4007 145 ( 0.26 %). End of HO BSS .........................../c4008 1 ( 0.00 %). Call clear ............................../c4041 307 ( 0.54 %). Wrong Aif circuit type ................../c4102 0 ( 0.00 %). Adjacent cell error ...................../c4100 0 ( 0.00 %). Drop calls (S7)............................/c4107 136 ( 0.24 %)Outgoing BSC ctrl HO attempts ................./ho_11 299802. Successes ................................./c4014 294415 ( 98.20 %). Failures ................................./hof_8a 5387 ( 1.80 %). BSC ctrl ho not allowed ................./c4038 7 ( 0.00 %). Blocked ................................./c4072 572 ( 0.19 %). Return to old .........................../c4015 4050 ( 1.35 %). End of HO ............................../c4016 581 ( 0.19 %). End of HO BSS .........................../c4017 1 ( 0.00 %). Call clear ............................../c4042 175 ( 0.06 %). Wrong Aif circuit type ................../c4096 0 ( 0.00 %). Drop calls ................................/c4084 570 ( 0.19 %)Intra cell HO attempts ......................./ho_24 122713. Successes ................................./ho_27 121602 ( 99.09 %). Failures ................................../hof_9 1111 ( 0.91 %). Intra cell ho not allowed .............../c4036 3 ( 0.00 %). Blocked ................................./c4019 8 ( 0.01 %). Return to old .........................../c4022 615 ( 0.50 %). MS lost .(drop call)...................../c4020 354 ( 0.29 %). Radio chn.act.failure .................../c4021 1 ( 0.00 %). Call clear ............................../c4039 130 ( 0.11 %). Wrong Aif circuit type ................../c4098 0 ( 0.00 %). Drop calls ................................/c4085 354 ( 0.29 %)

Interference Handover Activation : PARCROYALEHO drop ratio ................................/hfr_68 0.29 %Total HO failure ............................../hfr_2 2.68 %. HO failure due to blocking ................./hfr_55 0.40 %Outgoing MSC ctrl HO attempts ................../ho_9 40908. Successes ................................./c4004 38869 ( 95.02 %). Failures ................................./hof_6a 2039 ( 4.98 %). MSC ctrl ho not allowed ................./c4037 3 ( 0.01 %). Blocked ................................./c4055 242 ( 0.59 %). Return to old .........................../c4006 1429 ( 3.49 %). End of HO ............................../c4007 142 ( 0.35 %). End of HO BSS .........................../c4008 2 ( 0.00 %). Call clear ............................../c4041 221 ( 0.54 %). Wrong Aif circuit type ................../c4102 0 ( 0.00 %). Adjacent cell error ...................../c4100 0 ( 0.00 %). Drop calls (S7)............................/c4107 140 ( 0.34 %)Outgoing BSC ctrl HO attempts ................./ho_11 221387. Successes ................................./c4014 216107 ( 97.62 %). Failures ................................./hof_8a 5280 ( 2.38 %). BSC ctrl ho not allowed ................./c4038 3 ( 0.00 %). Blocked ................................./c4072 866 ( 0.39 %). Return to old .........................../c4015 3665 ( 1.66 %). End of HO ............................../c4016 621 ( 0.28 %). End of HO BSS .........................../c4017 0 ( 0.00 %). Call clear ............................../c4042 123 ( 0.06 %). Wrong Aif circuit type ................../c4096 0 ( 0.00 %). Drop calls ................................/c4084 621 ( 0.28 %)Intra cell HO attempts ......................./ho_24 15166. Successes ................................./ho_27 15044 ( 99.20 %). Failures ................................../hof_9 122 ( 0.80 %). Intra cell ho not allowed .............../c4036 0 ( 0.00 %). Blocked ................................./c4019 0 ( 0.00 %). Return to old .........................../c4022 76 ( 0.50 %). MS lost .(drop call)...................../c4020 35 ( 0.23 %). Radio chn.act.failure .................../c4021 0 ( 0.00 %). Call clear ............................../c4039 11 ( 0.07 %). Wrong Aif circuit type ................../c4098 0 ( 0.00 %). Drop calls ................................/c4085 35 ( 0.23 %)

Pre Post •HFR has improved. It means a right neighbor candidate is chosen and calls are not forced to remain on interfered Layer.

•Intra-cell HO Count has increased drastically due to Interference HO Activation.

•This has increased the absolute count of Drop calls due to Intra-cell HO but the same is compensated in RF losses.


Interference Handover Activation : SANJUAN

RF Loss + RF Loss HO : Pre = 1.47% Post = 1.31% (Improved by 11%)Drops per erlang : Pre = 0.77 Post = 0.83 (improved by 8%)Traffic : Pre = 9855 Post = 10609 (Traffic increased by 7.5%)



Pre Post


HO drop ratio ................................/hfr_68 0.24 %Total HO failure ............................../hfr_2 3.94 %. HO failure due to blocking ................./hfr_55 0.83 %Outgoing MSC ctrl HO attempts ................../ho_9 140357. Successes ................................./c4004 132174 ( 94.17 %). Failures ................................./hof_6a 8183 ( 5.83 %). MSC ctrl ho not allowed ................./c4037 3 ( 0.00 %). Blocked ................................./c4055 558 ( 0.40 %). Return to old .........................../c4006 6127 ( 4.37 %). End of HO ............................../c4007 523 ( 0.37 %). End of HO BSS .........................../c4008 6 ( 0.00 %). Call clear ............................../c4041 967 ( 0.69 %). Wrong Aif circuit type ................../c4102 0 ( 0.00 %). Adjacent cell error ...................../c4100 0 ( 0.00 %). Drop calls (S7)............................/c4107 445 ( 0.32 %)Outgoing BSC ctrl HO attempts ................./ho_11 784385. Successes ................................./c4014 752520 ( 95.94 %). Failures ................................./hof_8a 31865 ( 4.06 %). BSC ctrl ho not allowed ................./c4038 1 ( 0.00 %). Blocked ................................./c4072 8247 ( 1.05 %). Return to old .........................../c4015 21419 ( 2.73 %). End of HO ............................../c4016 1550 ( 0.20 %). End of HO BSS .........................../c4017 4 ( 0.00 %). Call clear ............................../c4042 643 ( 0.08 %). Wrong Aif circuit type ................../c4096 0 ( 0.00 %). Drop calls ................................/c4084 1440 ( 0.18 %)Intra cell HO attempts ......................./ho_24 136179. Successes ................................./ho_27 134377 ( 98.68 %). Failures ................................../hof_9 1802 ( 1.32 %). Intra cell ho not allowed .............../c4036 1 ( 0.00 %). Blocked ................................./c4019 9 ( 0.01 %). Return to old .........................../c4022 940 ( 0.69 %). MS lost .(drop call)...................../c4020 692 ( 0.51 %). Radio chn.act.failure .................../c4021 9 ( 0.01 %). Call clear ............................../c4039 152 ( 0.11 %). Wrong Aif circuit type ................../c4098 0 ( 0.00 %). Drop calls ................................/c4085 692 ( 0.51 %)

Interference Handover Activation : SANJUANHO drop ratio ................................/hfr_68 0.27 %Total HO failure ............................../hfr_2 7.50 %. HO failure due to blocking ................./hfr_55 0.98 %Outgoing MSC ctrl HO attempts ................../ho_9 146539. Successes ................................./c4004 118716 ( 81.01 %). Failures ................................./hof_6a 27823 ( 18.99 %). MSC ctrl ho not allowed ................./c4037 1 ( 0.00 %). Blocked ................................./c4055 604 ( 0.41 %). Return to old .........................../c4006 6053 ( 4.13 %). End of HO ............................../c4007 623 ( 0.43 %). End of HO BSS .........................../c4008 7 ( 0.00 %). Call clear ............................../c4041 820 ( 0.56 %). Wrong Aif circuit type ................../c4102 0 ( 0.00 %). Adjacent cell error ...................../c4100 19715 ( 13.45 %). Drop calls (S7)............................/c4107 439 ( 0.30 %)Outgoing BSC ctrl HO attempts ................./ho_11 541096. Successes ................................./c4014 516086 ( 95.38 %). Failures ................................./hof_8a 25010 ( 4.62 %). BSC ctrl ho not allowed ................./c4038 7 ( 0.00 %). Blocked ................................./c4072 6425 ( 1.19 %). Return to old .........................../c4015 16779 ( 3.10 %). End of HO ............................../c4016 1407 ( 0.26 %). End of HO BSS .........................../c4017 2 ( 0.00 %). Call clear ............................../c4042 392 ( 0.07 %). Wrong Aif circuit type ................../c4096 0 ( 0.00 %). Drop calls ................................/c4084 1371 ( 0.25 %)Intra cell HO attempts ......................./ho_24 33033. Successes ................................./ho_27 31804 ( 96.28 %). Failures ................................../hof_9 1229 ( 3.72 %). Intra cell ho not allowed .............../c4036 1 ( 0.00 %). Blocked ................................./c4019 1 ( 0.00 %). Return to old .........................../c4022 1101 ( 3.33 %). MS lost .(drop call)...................../c4020 93 ( 0.28 %). Radio chn.act.failure .................../c4021 2 ( 0.01 %). Call clear ............................../c4039 31 ( 0.09 %). Wrong Aif circuit type ................../c4098 0 ( 0.00 %). Drop calls ................................/c4085 93 ( 0.28 %)

Pre Post •HFR has improved. It means a right neighbor candidate is chosen and calls are not forced to remain on interfered Layer.

•Intra-cell HO Count has increased drastically due to Interference HO Activation.

•This has increased the absolute count of Drop calls due to Intra-cell HO but the same is compensated in RF losses.


Conclusion

1. CTC = 2 shall be implemented across network. This gives 25-30% HR reduction without much impact on Data traffic

2. DL DTx shall be implemented across network. The same gives 10-15% improvement in TCH drop and 7-10% improvement on SDCCH Drop Rate.

3. T200S shall be increased to 780msec. The same gives 15- 20% improvement on SDCCH Drop Rate.

4. RET/SLO shall be trialed at 3 more BSCs. The same shall give 10 to 15% better SDCCH Success Rate.

5. T3122 shall be tried on BSC having high SDCCH Blocking.


Thank You

2G Optimization Trial Report

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Transcript of 2G Optimization Trial Report