Gsm capacity
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  • (mc02h*440+(mc01-mc196-mc197+mc02b)*427+mc02b*383+(mc196+mc197-mc02b)*367+mc02a*286+mc8a*46)*8/(64*1024*3600) <br />
  • 4.49 x TBF_uc + 4.18 x TBF_ua +7.88 x TBF_dc + 6.83 x TBF_da + 6.83 x RRR + 0.48 x LLC_u + 1.5x LLC_d + 5.75 x (PS_Paging + CS_Paging) &lt; 600 <br />
  • P402a TIME_PMU_OVERLOAD_CRITICAL <br /> P402b TIME_PMU_OVERLOAD_SEVERE <br /> P402c TIME_PMU_OVERLOAD_HIGH <br /> P76a AV_PMU_CPU_POWER_BUDGET <br /> P77a MAX_PMU_CPU_POWER_BUDGET <br />

Gsm capacity Presentation Transcript

  • 1. Network Capacity monitor – Paging Capacity • Paging Capacity – Number_Paging_Per_LAC = 【( 9or3 -BS_AG_BLKRES ) × ( 3600/0.235 )】 ×Number_Paging/PCH_BLK ( 4 ) × ( 0.6 ) (reserve 60% redundancy) – Warning Value : 140000/hr ; Alarm Value : 160000/hr – For Alcatel network, when the paging times raise to 220000/hr, it will make CSSR worse – Optimization Method : • Check the MSC parameter and database, delete the redundancy data; • Reduce BS_AG_RESBLK, give more CCCH block for paging channel; • Adjust MSC parameter: paging retry times, to reduce the paging retry times; • Temporarily Reduce the high traffic cells’ TX-power, or increase the access threshold of high traffic cells; • Restrict the number of SMS, the SMS center can consider about temporarily close the advertisement SMS; • Split high load Location Area, Re-home BTS distribution
  • 2. Paging Capacity Evaluation sample MS C G1 G2 G3 G4 D5 BS C cc1_1_104 cc1_2_105 cc1_3_106 cc1_4_107 cc1_5_120 cc1_7_129 cc1_6_114 cc2_5_218 cc2_4_217 cc2_1_203 cc2_8_226 cc2_2_215 cc2_6_219 cc3_1_308 cc3_2_309 cc3_3_313 cc3_4_202 cc3_5_201 cc3_6_321 cc4_1_410 cc4_2_411 cc4_3_412 cc4_4_423 cc4_5_424 cc4_6_425 cc5_6_216 cc5_7_222 Peak paging times LAC 30% redundancy 50% redundancy 80% redundancy 17156 146858 190915 220287 122700 159510 184050 220860 17170 127868 166228 191801 230162 17178 17158 17172 141115 65476 54316 183450 85119 70611 211673 98214 81474 254007 117857 97769 17173 81785 106321 122678 147213 17180 94330 122629 141495 169794 17330 70534 91694 105801 126961 17329 95558 124225 143337 172004 17153 155335 201936 233003 279603 17313 155542 202205 233314 279976 17154 113178 147131 169766 203720 17176 52622 68408 78933 94719 17175 121692 158200 182538 219046 Alarm Value 264345 17155 Warning Value 140000 160000
  • 3. Network Capacity – A-interface and No.7 link • A-interface capacity – Control Erl/Ts of A-interface under the safe threshold. (0.85Erl/Ts) – A-interface need expansion for each BSC = Target Traffic(30% redundancy) / safe Erl/Ts of A-interface(0.85Erl/Ts) - current No of A-interface • No.7 signal link capacity – No.7 signaling load = ( MOC * 440 + MOT * 427 + SMS(MO) * 383 + SMS(MT) * 367 + LU * 286 + Paging * 46 ) *8 / ( 64*1024*3600 ) (calculate on BSS part) – Current No.7 signaling load can be statistic by NSS (directly check on NSS part) – Suggest control the No.7 signaling load under 0.4
  • 4. A-interface Capacity Sample BS C Config cc1_1_104 cc1_2_105 cc1_3_106 cc1_4_107 cc1_5_120 cc1_6_114 cc1_7_129 cc2_1_203 cc2_2_215 cc2_4_217 cc2_5_218 cc2_6_219 cc2_8_226 cc3_1_308 cc3_2_309 cc3_3_313 cc3_4_202 cc3_5_201 cc3_6_321 cc4_1_410 cc4_2_411 cc4_3_412 cc4_4_423 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 config6 No ACan be G-Ater interface expanded 52 52 56 49 52 48 48 52 49 51 44 52 44 63 40 60 44 45 28 44 50 44 58 2 3 3 2 3 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 1 2 12 8 4 15 8 16 16 12 15 13 20 12 20 1 24 0 20 19 36 20 14 21 6 Current No Traffic(3 of ACurrent 0% Erl_TS (30% A-interface Erl_TS interface Peak Traffic redunda redundancy) need expand TS ncy) 1123 0.76 1460 0.99 9 1474 1127 0.76 1465 0.99 9 1475 1316 0.83 1710 1.07 15 1593 1153 0.83 1499 1.08 14 1383 1131 0.76 1470 0.98 9 1493 1306 0.95 1698 1.24 23 1375 925 0.67 1202 0.87 1379 1138 0.78 1480 1.02 11 1454 1069 0.77 1389 1.00 9 1384 1214 0.83 1578 1.08 15 1463 1111 0.88 1445 1.14 16 1263 1173 0.79 1525 1.02 11 1493 979 0.77 1273 1.01 9 1264 1246 0.70 1620 0.91 5 1788 608 0.54 790 0.70 1127 1166 0.68 1515 0.89 3 1702 1135 0.90 1476 1.18 18 1255 1268 0.98 1648 1.28 24 1288 570 0.71 741 0.93 3 798 840 0.67 1092 0.87 1250 1033 0.73 1343 0.94 6 1423 940 0.75 1222 0.97 7 1254 1303 0.78 1694 1.02 12 1667
  • 5. No.7 signalling link capacity sample BS C Name NJ-G2-BSC1 NJ-G2-BSC10 NJ-G2-BSC11 NJ-G2-BSC12 NJ-G2-BSC13 NJ-G2-BSC14 NJ-G2-BSC15 NJ-G2-BSC16 NJ-G2-BSC17 NJ-G2-BSC18 NJ-G2-BSC19 NJ-G2-BSC2 BS C Name NJ-G2-BSC1 NJ-G2-BSC10 NJ-G2-BSC11 NJ-G2-BSC12 NJ-G2-BSC13 NJ-G2-BSC14 NJ-G2-BSC15 NJ-G2-BSC16 NJ-G2-BSC17 NJ-G2-BSC18 NJ-G2-BSC19 NJ-G2-BSC2 ST 22:00 17:00 21:00 22:00 21:00 21:00 17:00 17:00 17:00 22:00 17:00 22:00 ET 23:00 18:00 22:00 23:00 22:00 22:00 18:00 18:00 18:00 23:00 18:00 23:00 Current No.7 12 14 9 8 8 11 12 12 12 12 12 8 MOC MTC 28435 21325 18186 19953 12503 13500 21986 18907 18194 26295 18083 27824 73034 53811 41732 63864 29955 31916 50630 53173 53091 79998 47562 93660 S MS (MO) S MS (MT) Loc Update Paging 68645 63803 41620 88393 25717 33230 152842 59863 33711 34142 51533 109083 59848 57252 33468 98731 22906 23938 41242 98725 25818 25476 44199 88522 25856 30766 106047 88539 28784 35372 90480 116672 28491 34970 65551 116679 76169 71285 48690 144824 24026 30123 64703 117215 93719 86062 39281 104183 Total load Average S ugget Add Average Load after of No.7 Load of No.7 No of No.7 Adjustment 3.81 0.32 3.51 0.25 2.48 0.28 3.28 0.41 9 0.36 1.83 0.23 1.94 0.18 3.03 0.25 3.01 0.25 2.75 0.23 4.25 0.35 2.53 0.21 4.73 0.59 12 0.39 N7 signaling load control under 0.4
  • 6. Network Capacity – GPRS Capacity • RA Code and RA Color configuration is suitable or not • Ater-interface configuration – • The Ater interface configuration principle is: each Ater config 112 GPRS TS. Should consider about P150g to analyze the load. PPC Capacity – PPC capacity can be calculated by this formula: • (4.71*p30c+4.18*p30b+7.88*(p90a+p90c)+6.83*2*p90b+0.48*P74+1.5* P75+5.75* P53a)/3600, The result should be smaller than: 65%*650 – – • For BSC with many GPRS user, open MPDCH function. For multi-layer network or neighbor BSC, suggest to connect their GPU to different module of SGSN. GPU configuration requirement • • If 50< Cell No of BSC < 100, need 2 GPU; • • If Cell No of BSC < 50, need 1 GPU; If Cell No of BSC > 100, need 3 GPU. After LAC adjustment, should keep OMCR data consistent with MFS data
  • 7. GPRS Capacity Sample BSC cc1_1_104 cc1_2_105 cc1_3_106 cc1_4_107 cc1_5_120 cc1_6_114 cc1_7_129 cc2_1_203 cc2_2_215 cc2_4_217 cc2_5_218 cc2_6_219 cc2_8_226 cc3_1_308 cc3_2_309 cc3_3_313 cc3_4_202 cc3_5_201 cc3_6_321 cc4_1_410 cc4_2_411 cc4_3_412 cc4_4_423 cc4_5_424 cc4_6_425 cc5_6_216 cc5_7_222 Cell No 52 61 58 58 51 41 39 87 80 87 117 108 75 71 46 81 51 51 36 51 47 49 57 51 40 64 78 MAX_NB_ESTABLIS HED_PDCH_GPU(P1 50g) GPU 2 2 2 2 2 2 2 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 1 1 202 291 244 214 147 139 135 106 104 109 103 110 89 224 179 282 202 192 146 213 205 206 221 112 176 182 185 PDCH TIME_ATERM Time_DSP occupation per UX_CONG(P3 _Cong(P38 Ater 83a) 4) Ater Config 2 3 3 2 3 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 2 2 2 2 2 2 90% 87% 73% 96% 44% 62% 60% 47% 46% 49% 46% 49% 40% 100% 80% 84% 90% 86% 65% 95% 92% 92% 99% 50% 79% 81% 83% 0 0 0 455 0 0 0 0 0 0 0 0 0 26620 0 1215 285 0 0 505 2685 10 3190 7130 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Note One Ater fault One Ater fault
  • 8. GPRS Gb interface of Huawei  Gb Interface Suggestion  Gb interface number=A*8/(64*1024)/5 /70% ( higher integer ) Note : A : NS Performance―――>Received NS PDU Peak value ( 5s ); 70% is the percentage of Gb interface value divide by all transmission value