Description
BSS COUNTERS & FORMULASVersion: v 15 20.1.99 This set of pictures is a working document edited by Nokia CS/ Statistics Engineering, reviewed by Nokia PMWG. I covers mainly BSS counters and formulas built on them. This document is not for distribution to customers as such but parts of it may be used in customer cases. The latest version of this document is globally available for Nokia users as part of Cell Doctor documentation package in web at location (password from Juhani Neva) http://wwwalltr.ntc.nokia.com/CSTRE/NOS/SE/stateng.htm © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 1 BSS PM DOCUMENT REFERENCES Customer documents NMS Author: J.Neva 8/97 Version: 0.3 18.8.98 BSC Supplementeary references (counter descriptions) Using GSM/DCS Performance Measurements, T9 Basic Operating Principles and Procedures ,T10 NMS2000 Database Descriptions for BSS measurements (2) BSS Network Doctor Formulas Reference Guide TAN 0936 (1) Trigger point pictures included for: S6:traffic, res.access, service (3) S7:HO, HO adj.cell, IUO Working documents, Nokia internal, PMWG , delivery along Cell Doctor (1) Study of BSS counter formulas of Nokia database f_bss_NN.doc Pictures on BSS PM counters and formulas f_bss_NN.ppt Training documents (1) http://wwwalltr.ntc.nokia.com/CSTRE/NOS/SE/stateng.htm (2) http://wwwtre.tele.nokia.fi/NMS/ryhmat/tecdo/nmslib/index.html (3) http://wwwalltr.ntc.nokia.com/BSC/ORG/BSCTRE/DMSME/document.htm, link from (1) © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 2 Users finally decide what are KPI when they define the contents of the report OPERATOR’S USER GROUPS KEY PERFORMANCE INDICATORS (KPI) KPI Author: J.Neva 11/96 Version: 1.0 REPORTS PI MANAGEMENT MARKETING PI KPI a PI PI a b c PLANNING O&M CUSTOMER CARE KPI b . . . DISTRIBUTION . . . . . . PI GENERATION KPI xx . . . zz PI=Performance Indicator (counter, formulae, figure from MML output) WORK PROCESS KNOW - HOW TOOLS KNOW - HOW FORMULAE KNOW - HOW STATISTICS ENGINEERING SERVICE OF NOKIA CUSTOMER SERVICES © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 3 S4 (ava_4) Avail. Author: J. Note:In S8 the Metrosite requires => technical / operational unavailability can not be separated the diagnostics to be run before This PI is does not take into consideration Half RateTCH. availability counters are valid.Neva / F_BSS_15. sum(ave_sdcch_sub/res_av_denom3) 100 * --------------------------------------------------------.% sum(ave_sdcch_sub/res_av_denom3)+sum(ave_non_avail_sdcch) (p_nbsc_res_avail) Known problems: Affected by locked TRX under unlocked BCF and BTS.0 PMWG approval.PPT / 20-Jan-99 / page: 4 .98 SDCCH availability %.:2. S4 (ava_1a) sum(ave_avail_full_TCH/res_av_denom2) 100 * -----------------------------------------------------------.% sum(ave_avail_full_TCH/res_av_denom2)+sum(ave_non_avail_TCH) (p_nbsc_res_avail table) Known problems: If TRXs are locked and BTSs and BCFs are unlocked. TCH availability %. Note:Downitme of BTS can be counted from 'BCCH missing' alarms (2567. the TCHs appear as unavailable.Neva 10/98 Version: 1.12.Availability Information available on BTS level. in S7 the number will chaged to 7767! © NOKIA Customer Services / NMO / Performance Statistics / J. Non avail. SMS..SS /c1007 SDCCH REQUESTS /c1000 sdcch_seiz_att sdcch_assign TRUE SDCCH SEIZURES /TRF_25 (not updated in SDCCH HO) TRUE SDCCH SEIZURES FOR CALL. /c3020 sdcch_call_re_est EMERGENCY CALL /c3021 sdcch_emerg_call TRUE SDCCH SEIZURES FOR CALL & SS /TRF-28 TRF-27 .SMS) /c3012 succ_seiz_term CALL RE-EST.2.: v 1.9 11.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 5 .TRF_25 Author: J.1) AND OTHER FAILURES BEFORE ESTABL.98 PMWG approval.succ_sdcch_sms_est .9 11.MS accessing.) small part of failures other than sdcch_abis_* failures SDCCHSDCCH HO ASSIGNMENTS FOR CALLS.LU. failed chan.SS /TRF-27 MOC (incl. noise (ghosts) SDCCH requests SDCCH ACCESSES REJECTED IN BSC 3/8 of ghosts (ph. INDICATION (incl.SMS) /c3013 succ_seiz_orig MTC (incl.act.CAUSE /c3030 ghost_ccch_res Distance verifying (S5) 5/8 OF GHOSTS (ph.1) REJECTED DUE TO ILLEGAL EST.unsucc _sdcch_sms_est SDCCHSDCCH HO SEIZURES FOR HO /c1006 sdcch_ho_seiz BLOCKED /blck_15 sdcch_busy_att tch_seiz_due_sdcc h_con FACCH call setups /c1099 tch_seiz_due_sdcc h_con TCH SDCCH BLOCKING (blck_5a) TRUE SDCCH SEIZURES FOR SMS LOCATION UPDATE /c3019 sdcch_loc_upd Normal LU Periodic LU IMSI attach IMSI DETACH SDCCH (S7) /c3033 succ_sdcch_sms_est + unsucc _sdcch_sms_est NOTE: Triggered also in case of HO attempt if there are no free SDCCH © NOKIA Customer Services / NMO / Performance Statistics / J.Neva 5/96 Version: 1.98 SDCCH FAILURES /c57020 (S7) (Ghosts) RACH on CCCH /c3004 sdcch_t3101_expired SDCCH FAILURES /c1075 sdcch_abis_fail_call ch_req_msg_rec REJECTED DUE TO DISTANCE (S5) /c3031 rej_seiz_att_due_dist (blocked chan.IMSI detach): /SD_1 c1007.2.corrupted msgs. PPT / 20-Jan-99 / page: 6 .12.4 9. /c3025 tch_call_re_est MOC /c3024 tch_moc FTCH SUCC SEIZ FOR FCS /C1125 tch_succ_full_seiz_fast_call OR MTC /c3023 tch_mtc EMERGENCY CALL /c3022 tch_emerg_call HTCH SUCC SEIZ .Neva 1/97 Version: 0. INDICATION (incl. /C1126 tch_succ_half_seiz_fast_call IMSI DETACH TCH /c3034 (coming in S7) FTCH REQ. RATE UNDEF. FCS.1) Author: J. FOR FCS.Neva / F_BSS_15. noise (ghosts) FACCH call setup (S5) SDCCH ACCESSES REJECTED IN BSC 3/8 of ghosts (ph. /C1124 tch_fast_call_ch_rate_not_det © NOKIA Customer Services / NMO / Performance Statistics / J. RATE UNDEF. FCS /C1123 tch_full_req_fast_call OR TCH REQ.CAUSE /c3030 ghost_ccch_res 5/8 OF GHOSTS (ph.1) AND OTHER FAILURES BEFORE ESTABL.TRF_25 TCH FAILURES /c1084 tch_abis_fail_call TCH SUCC REQ FOR FCS /C1044 tch_fast_seiz TCH SEIZURES FOR FACCH CALL SETUP TCH SUCC SEIZ ATT DUE TO SDCCH CONGEST /C1099 tch_seiz_due_sdcch_con (S5) CALL RE-EST.MS accessing.97 PMWG review.IMSI detach): /SD_1 c1007.: 0.12.4 9.97 RACH on CCCH /c3004 ch_req_msg_rec REJECTED DUE TO DISTANCE (S5) /c3031 rej_seiz_att_due_dist SDCCH REQUESTS /C1000 sdcch_seiz_att BLOCKED /C1001 sdcch_busy_att TCH REQUESTS /C1010 tch_request TCH REQ FOR FCS /C1043 tch_fast_req TCH SEIZ ATT DUE TO SDCCH CONGEST /C1098 tch_seiz_att_due_sdcch_con (S5) REJECTED DUE TO ILLEGAL EST. 9 12.1999 MS MOVED TO TCH /c1148 (S7) xxxx NOTE: If Trunk Reservation is used then HO and Call blocking can not be counted precisely (there is only one counter for Trunk Res. Invocation Refused case) TCH REQUESTS FOR NEW CALL /trf_18a tch_call_req .1.TCH requests.Neva 5/96 Version: 1.1.Neva / F_BSS_15.1999 PMWG approval.(bsc_i_unsucc_a_int_circ_type+msc_controlled_in_ho+ho_unsucc_a_int_circ_type) TCH REQUESTS FOR FCS /c1043 tch_fast_req © NOKIA Customer Services / NMO / Performance Statistics / J.feature) /dr_5 cell_sdcch_tch DR OUT SUCC /dr_3 msc_o_sdcch_tch+bsc_o_sdcch_tch Author: J.: 12. call (S6) TCH CALL BLOCKING (blck_8c) = 100*blck_9b/(c1026-trf_49) % DR intra SUCC (IUO opt.trf_49 FROM Q TO DR /XX1 1173(S8) TO QUEUE /c1016 tch_qd_call_att TCH SEIZURES FOR NEW CALL /c1009 tch_norm_seiz UNSERVED QUEUED CALL REQ (timer expiry or higher priority queuer) /c1024 unsrv_qd_call_att TCH REQUESTS /C1010 tch_request TCH REQUESTS FOR HO /ho_14b BLOCKED CALLS /blck_9b tch_call_req-trf_49-tch_norm_seiz -dr_3-dr_5 tch_request -tch_call_req -tch_fast_req -trf_50 CALL RETRIES DUE TO AIF POOL MISMATCH / trf_49 tch_rej_due_req_ch_a_if_crc .PPT / 20-Jan-99 / page: 7 . : 12.trf_49 HO RETRIES DUE TO AIF POOL MISMATCH / trf_50 bsc_i_unsucc_a_int_circ_type+msc_controlled_in_ho +ho_unsucc_a_int_circ_type BLOCKED HO’S /blck_10b TCH REQUESTS /C1010 tch_request TCH REQUESTS FOR HO /ho_14b ho_14b. HO and FCS (S6) Author: J.que_5 TCH SEIZURES FOR HO (incl. NONQUEUED TCH HO REQ /que_6 tch_ho_seiz .1999 PMWG approval.1999 NOTE: If Trunk Reservation is used then HO and Call blocking can not be counted precisely (there is only one counter for Trunk Res.Neva 5/96 Version: 1.1.9 12. DR in) /c1008 tch_ho_seiz TCH HO BLOCKING (blck_11c) = 100*blck_10b/ho_14b % TCH REQUESTS FOR FCS /c1043 tch_fast_req TCH FCS SEIZURE ATTEMPTS /c1098 (S5) tch_seiz_att_due_sdcch_con TCH FCS SEIZURES /c1099 (S5) tch_seiz_due_sdcch_con BLOCKED TCH FCS SEIZURES /blsck_18 tch_seiz_att_due_sdcch_con -tch_seiz_due_sdcch_con Note1: Aif circuit pool change causes this ratio to show higher value than real blocking.PPT / 20-Jan-99 / page: 8 . QUEUED TCH HO REQ /que_5 tch_qd_ho_att . Invocation Refused case) TCH REQUESTS FOR NEW CALL /c1026 /trf_18a tch_call_req .1.Neva / F_BSS_15. © NOKIA Customer Services / NMO / Performance Statistics / J.unsrv_qd_ho_att SUCC.TCH requests.tch_ho_seiz tch_request -tch_call_req -tch_fast_req -trf_50 SUCC. This is the case if TCH_REJ_DUE_REQ_CH_A_IF_CRC is triggered. DR active 1 2 3 4 Signalling on SDCCH In Queue on SDCCH of this cell Author: M.98 4 On TCH MS MS In Queue for HO.by default. smaller priority served first. for 1 TRX => 4 places in queue 4 logical places in queue 2 2 HO queuing 3 HO queuing 3 Call Call queuing queuing on SDCCH on SDCCH Order in the queue: . if no difference in priority. Accordingly all new call attempts get rejected on SDCCH because SDCCH is full.Räsänen 6/98 Version: 1.queue is full (2 calls.Neva / F_BSS_15.9.Queueing 1/: example 1TRX. counter 1001 sdcch_busy_att updated (had there been free TCH's. parameters ZEQH) . combined CCH. ZEQH DEF 50%. the MS Is on TCH of another cell On TCH. HO candidates served first (QPC > QPH.:18. QPC > QPN. FACCH call setup or dynamic SDCCH allocation could have been attempted) © NOKIA Customer Services / NOS / Statistics Engineering / J.0 PMWG approval. or accessing TCH Time limit handover (TLH) DEF 5 seconds (max: 10sec) DR Maximum Length Of Queue MQL = Max Queue Length parameter. 2 Hos) and SDCCH is full.between HO and Call candidates. MS MS 4 SDCCH slots MS MS MS MS 7 TCH 4 4 MS MS 4 MS 4 MS 4 MS 4 MS 4 MS NOTE: SDCCH resources are used by queuing No free SDCCH.PPT / 10-Dec-98 / page: 9 . mobiles are ordered by mobile priority. first come first served In this example the TCHs are all seized. Neva / F_BSS_15. target 4047 msc_i_sdcch_tch_at 4060 bsc_i_sdcch_tch_at Failed DR.9. source X Normal Assignment X 1003 sdcch_radio_fail Assignment Attempt 1009 tch_norm_seiz or or 4 TCH 1013 tch_radio_fail 1084 tch_abis_fail_call 1020 ave_que_time_call_att / 1021 queue_denom2 shows the average call setup queueing time 1148 xxxxxx (S7) Time limit call (TLC) X DEF 10 seconds (max: 15sec) Min time limit directed retry (MIDR) DEF 0 seconds Max time limit directed retry (MADR) DEF 5 seconds Expiry -> MS removed from the queue 1011 tch_req_rej_lack 1024 unsrv_qd_call_att X Expiry -> MS removed from the queue 1060 que_all_ass_req_fail If TLC < MADR. and TLC expires.S7 not included) Successful DR. source 4050 msc_o_sdcch_tch Author: M.98 4 or TCH of other cell Successful DR.X Call attempt lost and MS goes to idle state Queueing 2/2: timers and counters example: queueing and DR activated.PPT / 10-Dec-98 / page: 10 . source 4053 msc_o_sdcch_tch_at 4068 bsc_o_sdcch_tch_at DR attempt.Räsänen 6/98 Version: 1. (direct access IUO.0 PMWG approval. target 1008 tch_ho_seiz 1010 tch_request 4044 msc_i_sdcch_tch or 1010 tch_request 1016 tch_qd_call_att 1026 tch_call_req 4065 bsc_o_sdcch_tch 1056 que_all_ass_req 1173 rem_from_queue_due_dr (S8 new counter ): MS removed from queue because of DR 4057 bsc_i_sdcch_tch 1 Signalling on SDCCH 2 Queuing on SDCCH DR DR attempt.:18. MS is removed from call queue but DR may still happen © NOKIA Customer Services / NOS / Statistics Engineering / J. 2 12/97 PMWG appr.: 1.SMS) /c3012 succ_seiz_term Inter cell SDCCH to SDCCH HO one of SDCCH HO attempt counters triggered bsc_o_sdcch_at /c4069 or msc_o_sdcch_at /c4054 one of SDCCH HO success counters triggered bsc_o_sdcch /c4066 or msc_o_sdcch /c4051 SDCCH .SMS) /c3013 succ_seiz_orig MTC (incl.98 Intra cell SDCCH to SDCCH HO attempt counter success counter cell_sdcch /c4075 cell_sdcch_at /c4078 sdcch_emerg_call MOC (incl.2. LU s AND IMSI DETACHES /c1007 sdcch_assign LOC UPDATE /c3019 sdcch_loc_upd CALL RE-EST /c3020 sdcch_call_re_est IMSI DETACH (S7) /c3033 imsi_detach_sdcch Author: J.SDCCH INTER CELL HO TO CELL B Cell B (target) SDCCH REQUESTS /c1000 SEIZURES FOR HO /c1006 sdcch_ho_seiz one of SDCCH HO attempt counters triggered bsc_i_sdcch_at /c4061 or msc_i_sdcch_at /c4048 one of SDCCH HO success counters triggered bsc_i_sdcch /c4058 or msc_i_sdcch /c4045 TCH sdcch_seiz_att ==> SDCCH HO have to be compensated when counting SDCCH success ratio (CSF_2x) for a cell © NOKIA Customer Services / NMO / Performance Statistics / J.SDCCH call request and SDCCH HO One of these triggered Cell A (source) EMERG CALL /c3021 SDCCH REQUESTS /c1000 sdcch_seiz_ att SEIZURES FOR CALLS .Neva / F_BSS_15.Neva 1/97 Version: 1.PPT / 20-Jan-99 / page: 11 .2 11. /c3020 sdcch_call_re_est TCH NOTE ! Call re-establishment can be executed more than once.: 1.PPT / 20-Jan-99 / page: 12 .SMS) /c3012 succ_seiz_term Call re-establishment executed Cell A SDCCH REQUESTS /c1000 sdcch_seiz_att SEIZURES FOR CALLS AND LU /c1007 sdcch_assign CALL RE-EST.2 11.Neva / F_BSS_15.2 11.SMS) /c3013 SDCCH REQUESTS /c1000 sdcch_seiz_att SEIZURES FOR CALLS AND LU /c1007 sdcch_assign succ_seiz_orig MTC (incl.2.Neva 1/97 Version: 1. moc and mtc ?? © NOKIA Customer Services / NMO / Performance Statistics / J.2.98 PMWG review. Is call re-establishment possible only for emergency.Drop on SDCCH and call re-establishment One of these triggered Cell A EMERGENCY CALL /c3021 sdcch_emerg_call Author: J.98 Ghost rach accesses or double seizures Call drops one of SDCCH fail counters is triggered SDCCH_RADIO_FAIL SDCCH_USER_ACT SDCCH_BCSU_RESET SDCCH_NETW_ACT SDCCH_BTS_FAIL SDCCH_LAPD_FAIL SDCCH_A_IF_FAIL_CALL SDCCH_ABIS_FAIL_CALL /c1003 /c1037 /c1038 /c1039 /c1036 /c1035 /c1078 /c1075 or or or or or or or MOC (incl. 1 12/97 PMWG review.:1.Neva / F_BSS_15.2.98 TCH SEIZURES FOR NEW CALL /c1009 tch_norm_seiz MOC (incl. Is call re-establishment possible only for emergency.Drop on TCH and call re-establishment One of these triggered Cell A EMERGENCY CALL /c3021 sdcch_emerg_call TCH REQUESTS /c1010 tch_request TCH REQUESTS FOR NEW CALL /c1026 tch_call_req SDCCH REQUESTS /c1000 sdcch_seiz_att SEIZURES FOR CALLS AND LU /c1007 sdcch_assign Author: J.SMS) /c3012 succ_seiz_term one of TCH fail counters is triggered TCH_RADIO_FAIL TCH_USER_ACT TCH_BCSU_RESET TCH_NETW_ACT TCH_BTS_FAIL TCH_LAPD_FAIL TCH_A_IF_FAIL_CALL TCH_ABIS_FAIL_CALL TCH_TR_FAIL TCH_ACT_FAIL_CALL /c1013 /c1048 /c1049 /c1050 /c1047 /c1046 /c1087 /c1084 /c1029 /c1081 or or or or or or or or or Call drops Call re-establishment executed Cell A SDCCH REQUESTS /c1000 sdcch_seiz_att SEIZURES FOR CALLS AND LU /c1007 sdcch_assign CALL RE-EST.SMS) /c3013 succ_seiz_orig MTC (incl.1 11.PPT / 20-Jan-99 / page: 13 . moc and mtc ?? © NOKIA Customer Services / NMO / Performance Statistics / J. /c3020 sdcch_call_re_est TCH REQUESTS /c1010 tch_request TCH REQUESTS FOR NEW CALL /c1026 tch_call_req TCH SEIZURES FOR NEW CALL /c1009 tch_norm_seiz NOTE ! Call re-establishment can be executed more than once.Neva 1/97 Version: 1. PPT / 20-Jan-99 / page: 14 TypeDateHere DROPPED_CALL DOCUMENTTYPE 1 (1) .0 12.D08 MSC 2 TCH_RADIO_FAIL TCH_RF_OLD_HO TCH_ABIS_FAIL_CALL TCH_ABIS_FAIL_OLD TCH_A_IF_FAIL_CALL TCH_A_IF_FAIL_OLD TCH_TR_FAIL TCH_TR_FAIL_OLD TCH_LAPD_FAIL TCH_BTS_FAIL TCH_BCSU_RESET TCH_USER_ACT TCH_NETW_ACT TCH_ACT_FAIL_CALL and 41 'Temp.98 BSC 1 SUCC_SEIZ_ORIG BSC 2 SUCC_SEIZ_TERM MS B TCH_NORM_SEIZ CONVER_STARTED MS A SDCCH SDCCH TCH_HO_SEIZ TCH_NORM_SEIZ CONVER_STARTED TCH_HO_SEIZ TCH #1 TCH #2 TCH_HO_SEIZ One of these triggered TCH #2 Silence and then busy tone after time-out TCH #3 BSC1: normal clear Drop call (P_MSC_CC) CLEAR_CODE_ID/CALLS_IN_SPEECH (P_MSC_CC) CLEAR_CODE_ID/CALLS_IN_SPEECH MSC 1 Eg.D07.0 20.D02.D03.D01.B14.610.60E.10. Author: J.609.B13.Drop Call ratio problematic Instead of Drop Call ratio it is also possible to talk about Drops per Erlang ratio. failure' B13 TypeYourNameHere TypeUnitOrDepartmentHere © NOKIA Customer Services / NMO / Performance Statistics / J.D06.Neva 9/98 Version: 1.Neva / F_BSS_15.B1C.70A.D04.D00.clear codes: 208.: 1.B1B.9.B16.98 PMWG review. sdcch_radio_fail_old (1004) is triggered.: 1. TCH SEIZURES FOR HO (incl.98 Cell A (source) TCH REQUESTS FOR NEW CALL /c1026 DR OUT ATT /DR_1 msc_o_sdcch_tch_at /c4053 or bsc_o_sdcch_tch_at /c4068 DR OUT SUCC /DR_3 msc_o_sdcch_tch /c4050 or bsc_o_sdcch_tch /c4065 TCH REQUESTS /c1010 In case of normal DR tch_norm_seiz (1009) counter is not triggered at all.2. Cell B (target) TCH REQUESTS /c1010 tch_request DR (SDCCH.Neva / F_BSS_15.TCH HO) TO CELL B If normal DR fails. DR in) /c1008 tch_ho_seiz DR IN ATT /DR_2 msc_i_sdcch_tch_at /c4047 or bsc_i_sdcch_tch_at /c4060 DR IN SUCC /DR_4 msc_i_sdcch_tch /c4044 or bsc_i_sdcch_tch /c4057 © NOKIA Customer Services / NMO / Performance Statistics / J.Neva 11/96 Version: 1.TCH request and normal DR Author: J.PPT / 20-Jan-99 / page: 15 . tch_request tch_call_req TCH congestion In case of normal DR tch_req_rej_lack (1011) counter is not triggered at all.2 12/97 PMWG approval.2 11. Neva / F_BSS_15.0 6.PPT / 10-Dec-98 / page: 16 .: 1.11.97 PMWG approval. DR in) /c1008 DR ATT /c4077 cell_sdcch_tch_at Intra DR SUCC /c4074 cell_sdcch_tch © NOKIA Customer Services / NOS / Statistics Engineering / J.0 24.97 Cell A (source.Pekkarinen 10/97 Version: 1. S6) Author: J. regular TRX) TCH REQUESTS FOR NEW CALL /c1026 tch_call_req TCH REQUESTS /c1010 tch_request TCH congestion DR (SDCCH-TCH HO) TO SUPER TRX Cell A (target. super TRX) TCH REQUESTS /c1010 tch_request tch_ho_seiz TCH SEIZURES FOR HO (incl.10.TCH request and Intra cell DR (FEATURE: TCH assignment to super-reuse TRX in IUO. super TRX) TCH REQUESTS /c1010 tch_request tch_ho_seiz TCH SEIZURES FOR HO (incl.Pekkarinen 10/97 Version: 1.TCH request and Inter cell DR (FEATURE: TCH assignment to super-reuse TRX in IUO.11. regular TRX) TCH REQUESTS FOR NEW CALL /c1026 Author: J.: 1.97 PMWG approval.PPT / 20-Jan-99 / page: 17 . S6) Cell A (source.97 DR OUT ATT /c4068 bsc_o_sdcch_tch_at DR OUT SUCC /c4065 bsc_o_sdcch_tch TCH REQUESTS /c1010 tch_request tch_call_req TCH congestion DR (SDCCH-TCH HO) TO SUPER TRX CELL B TCH REQUESTS REJ DUE LACK /c1011 ???????? tch_rej_lack Cell B (target. DR in) /c1008 DR IN ATT /c4060 bsc_i_sdcch_tch_at DR IN SUCC /c4057 bsc_i_sdcch_tch © NOKIA Customer Services / NMO / Performance Statistics / J.10.0 24.Neva / F_BSS_15.0 6. regular TRX) Normal TCH call request handling © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.Pekkarinen 10/97 Version: 1.10. S7 ) Cell A (source.0 24.97 Cell A (target.PPT / 20-Jan-99 / page: 18 .: 1.11.TCH request and Intra cell direct access (FEATURE: Direct access to super-reuse TRX. super TRX) TCH REQUESTS /c1010 tch_request TCH REQUESTS FOR NEW CALL /c1026 tch_call_req TCH SEIZURES FOR NEW CALL /c1009 No Congestion Congestion tch_norm_seiz Direct Access Attempt /c4077 cell_sdcch_tch_at TCH SEIZURES FOR DIRECT ACCESS /c1165 succ_tch_seiz_for_dir_acc Intra Dir Acc SUCC /c4074 cell_sdcch_tch DIR ACC TCH REQ REJ DUE LACK /c1166 tcH_req_dir_acc_rej_due_lack Cell A (source.0 6.97 PMWG approval. regular TRX) Direct Access (SDCCH-TCH HO) TO SUPER TRX Author: J. super TRX) TCH REQUESTS /c1010 tch_request TCH REQUESTS FOR NEW CALL /c1026 tch_call_req DIR ACC TCH REQ REJ DUE LACK /c1166 tcH_req_dir_acc_rej_due_lack TCH SEIZURES FOR NEW CALL /c1009 tch_norm_seiz Direct Access in att /c4060 bsc_i_sdcch_tch_at Direct Access in success /c4057 bsc_i_sdcch_tch No Congestion Congestion TCH SEIZURES FOR DIRECT ACCESS /c1165 succ_tch_seiz_for_dir_acc Cell A (source.0 24.TCH request and Inter cell direct access (FEATURE: Direct access to super-reuse TRX.Pekkarinen 10/97 Version: 1.: 1. regular TRX) Direct Access OUT ATT /c4068 bsc_o_sdcch_tch_at Author: J. regular TRX) Normal TCH call request handling © NOKIA Customer Services / NMO / Performance Statistics / J.97 Direct Access OUT SUCC /c4065 bsc_o_sdcch_tch Direct Access (SDCCH-TCH HO) TO SUPER TRX CELL B Cell B (target.PPT / 20-Jan-99 / page: 19 .11.10. S7 ) Cell A (source.Neva / F_BSS_15.97 PMWG approval.0 6. lower priority calls on ==> p_nbsc-service.: 26.dropped_call is triggered (NOT TCH failure counters) This is not triggered in S6 feature TCH assignment to super reuse TRX in IUO (intra and inter cell HO) © NOKIA Customer Services / NMO / Performance Statistics / J.98 NEW CALLS ON TCH TCH SEIZURES FOR NEW CALL /c1009 tch_norm_seiz DR IN SUCC /DR_4 msc_i_sdcch_tch /c4044 or bsc_i_sdcch_tch /c4057 FACCH CALL SETUP /c1099 (S5) tch_seiz_due_sdcch_con (unknown) HO OUT FROM AREA (unknown) TCH DROPS /DCF_0 TCH_RADIO_FAIL +TCH_RF_OLD_HO +TCH_ABIS_FAIL_CALL +TCH_ABIS_FAIL_OLD +TCH_A_IF_FAIL_CALL +TCH_A_IF_FAIL_OLD +TCH_TR_FAIL +TCH_TR_FAIL_OLD +TCH_LAPD_FAIL +TCH_BTS_FAIL +TCH_USER_ACT +TCH_BCSU_RESET +TCH_NETW_ACT +TCH_ACT_FAIL_CALL /c1013 /c1014 /c1084 /c1085 /c1087 /c1088 /c1029 /c1030 /c1046 /c1047 /c1048 /c1049 /c1050 /c1081 NOTE: Drop call by pre-emption .1st priority call requeste to be established .Calls and drop calls on TCH.5.PPT / 20-Jan-99 / page: 20 .Neva 12/96 Version: 1.2 26. area view Area (nn cells) NORMAL END Author: J.all TCH seized .Neva / F_BSS_15.5.98 PMWG approval. 0 PMWG approval.:2.12. © NOKIA Customer Services / NMO / Performance Statistics / J.Neva 10/98 Version: 1.Counting Erlangs (p_nbsc_res_avail) Nbr of samples Cumulative sum BTS xx TRX-nn BCCH TCH seized seized seized seized TCH seized seized TCH seized TCH seized TCH TCH -> -> -> -> -> Ave_busy_tch Author: J.PPT / 20-Jan-99 / page: 21 .98 Sampling every 20sec Res_av_denom14 seized seized 2 2+4 2+4+1 … … +3 1 2 3 … 180 0 sec 20 sec 40 sec 3580sec Counter values sent to NMS2000 and stored once in measurment period The same principle is used in IUO measurement.Neva / F_BSS_15. and the reservation counter is also updated only at Measurement Period 2.48 sec) is added to 59000 tch_single_band_hold_time or 59001 tch_dual_band_hold_time Also.. the TCH reservation will not cause any call seconds to Measurement Period 1.98 BTS xx TRX-nn one TCH TSL Call on this TCH TCH seized THC reservation length 3000 sec (measurement starts from the estab_ind.:2. the values of the measurement counters are transmitted to the NMS/2000 NOTE: In the above example. the length of the reservation (unit 0.e.0 PMWG approval. © NOKIA Customer Services / NMO / Performance Statistics / J. one of the following counters is increased by one: 59002 tch_single_band_hold_reserv or 59003 tch_dual_band_hold_reserv At the end of the measurement period.12. i.PPT / 20-Jan-99 / page: 22 .Neva / F_BSS_15. MS is on TCH) TCH released (measurement stops from the release of the TCH) At release of TCH: In the BSC.Counting Erlangs (p_nbsc_dual_band) Measurement Period 1 Measurement Period 2 Author: Markku Räsänen 11/98 Version: 1. :2.Neva / F_BSS_15.Counting Erlangs CALL SETUP TCH SDCCH When BSC receives Establish Indication.12.0 PMWG approval.98 differencies between dual band and 20 sec sampling methods MS releases call or HO to another TCH RCS process and the DB measurement is stopped when BSC receives Release Indication Dual Band Resource Availability (20s sampling) Resource Availability measurement is stopped when BSC receives rf channel release ack from the BTS HO Resource Availability Dual Band TCH TCH Dual Band Resource Availability © NOKIA Customer Services / NMO / Performance Statistics / J.the RCS process is started and TCH reservation time for Dual Band measurement is started Resource availability starts at the start of the TCH reservation Author: Markku Räsänen 11/98 Version: 1.PPT / 20-Jan-99 / page: 23 . : 2.12.PPT / 20-Jan-99 / page: 24 .Neva / F_BSS_15. V2 CODEC HTCH SEIZURES /C1112 tch_half_seiz_speech_ver2 V2 CODEC HTCH FAILURES /C1131 tch_ended_due_transc_hr_rate2 V3 CODEC FTCH SEIZURES /C1110 tch_full_seiz_speech_ver3 V3 CODEC HTCH SEIZURES /C1113 tch_half_seiz_speech_ver3 V3 CODEC FTCH FAILURES /C1129 tch_ended_due_transc_fr_rate3 Version 3 is for future use. EFR speech codec has been specified by Nokia with university of Sherbrooke co-operation. ETSI selected the same codec in SMG#16..Neva 11/98 Version: 1.Author: J.0 PMWG approval. Codec seizure counters V1 CODEC FTCH SEIZURES /C1108 tch_full_seiz_speech_ver1 V1 CODEC HTCH SEIZURES /C1111 tch_half_seiz_speech_ver1 V1 CODEC FTCH FAILURES /C1127 tch_ended_due_transc_fr_rate1 V1 CODEC HTCH FAILURES /C1130 tch_ended_due_transch_hr_rate1 TCH FCS SEIZURES /c1099 (S5) tch_seiz_due_sdcch_con S p e e c h V2 CODEC FTCH SEIZURES (EFR) /C1109 tch_full_seiz_speech_ver2 V2 CODEC FTCH FAILURES /C1128 tch_ended_due_transc_fr_rate2 Enhnanced Full rate (v2. EFR) EFR would provide speech quality comparable to landline for GSM. DR in) /c1008 tch_ho_seiz Data calls do not trigger codec counters. EFR codec was initially specified for ANSI. V3 CODEC HTCH FAILURES /C1132 tch_ended_due_transc_hr_rate3 © NOKIA Customer Services / NMO / Performance Statistics / J. NOTE: Codec counters are triggered in channel relase (even if the call drops) Data calls do not trigger codec counters.98 Traffic per codec version (S5->) TCH SEIZURES FOR DATA CALLS TCH SEIZURES FOR NEW CALL /c1009 tch_norm_seiz TCH SEIZURES FOR HO (incl. Author: J.Neva 1/99 Version: 1.Neva / F_BSS_15.0 PMWG approval. RETRY /C500934 m_switch_crc_pool MSC I HO SUCCESSES /C4093 msc_i_succ_switch_circ_pool MSC I HO UNSUCC /C4101 msc_controlled_in_ho MSC O HO SUCCESSES /C4095 msc_o_switch_circ_pool MSC O .HO UNSUCC /C4102 msc_controlled_out_ho POOL NOT AVAILABLE /C500935 m_speech_version_unavail HO ATT DUE TO AIF CIRCUIT TYPE CHANGE /C4099 ho_att_due_switch_pool p_nbsc_traffic REJECTIONS DUE TO MISMATCH /C1122 tch_rej_due_req_ch_aif_crc © NOKIA Customer Services / NMO / Performance Statistics / J.: Aif circuit pool related counters p_nbsc_ho INTRA CELL HO UNSUCC /C4098 ho_unsucc_a_int_circ_type p_nbsc_cc BSC I HO UNSUCC /C4097 bsc_i_unsucc_a_int_circ_type BSC O HO UNSUCC /C4096 bsc_o_unsucc_a_int_circ_type MSC OUT SUCC HO /C ext_out_switch_crc_pool MSC I HO ATTEMPTS /C4092 msc_i_att_switch_circ_pool MSC O HO ATTEMPTS /C4094 msc_o_att_switch_circ_pool MSC IN SUCC HO /C estab_ext_in_switch_circ_pool POOL AVAILABLE.PPT / 20-Jan-99 / page: 25 . since all the handovers are signalled via MSC.98 (Source of info:Tarja Hiltunen) =Yes =No Candidate = serving cell All HOs are MSC controlled (used only for test purposes!) When "YES" the load between MSC and BSC is increased strongly.Handover enabling ‘Disable internal HO’ Author: J.4.PPT / 20-Jan-99 / page: 26 .Neva 12/96 Version: 0.Neva / F_BSS_15.2 5. BSC controlled intra cell HO Yes No First candidate belongs to own BSC No MSC controlled HO Yes ‘Ext HO if other BSS’ =No BSC controlled inter cell HO =Yes Cells belonging to another BSC in the list No BSC controlled inter cell HO Yes MSC controlled HO © NOKIA Customer Services / NMO / Performance Statistics / J. 96 HO attempts SDCCH-TCH HO attempts /ho_17 msc_o_sdcch_tch_at + msc_i_ sdcch_tch _at + bsc_o_ sdcch_tch _at + bsc_i_ sdcch_tch _at + cell_ sdcch_tch _at SDCCH-TCH HO successes /ho_20 msc_o_ sdcch_tch + msc_i_ sdcch_tch + bsc_o_ sdcch_tch + bsc_i_ sdcch_tch + cell_ sdcch_tch SDCCH-TCH HO failures = ho_17 .0 6.9.Handovers by channel types TCH-TCH HO attempts /ho_16 msc_o_tch_tch_at + msc_i_tch_tch_at + bsc_o_tch_tch_at + bsc_i_tch_tch_at + cell_tch_tch_at TCH-TCH HO successes /ho_19 msc_o_tch_tch + msc_i_tch_tch + bsc_o_tch_tch + bsc_i_tch_tch + cell_tch_tch TCH-TCH HO failures = ho_16 .ho_21 © NOKIA Customer Services / NMO / Performance Statistics / J.9.Neva / F_BSS_15.: v1.ho_20 SDCCH-SDCCH HO attempts /ho_18 msc_o_sdcch_at + msc_i_sdcch_at + bsc_o_sdcch_at + bsc_i_sdcch_at + cell_sdcch_at SDCCHSDCCH HO successes /ho_21 msc_o_sdcch + msc_i_sdcch + bsc_o_sdcch + bsc_i_sdcch + cell_sdcch SDCCH HO failures = ho_18 .0 6.PPT / 20-Jan-99 / page: 27 .Neva 8/96 Version: 1.96 PMWG approval.ho_19 Author: J. Handovers by control MSC controlled HO attempts /ho_22 msc_o_tch_tch_at + msc_i_tch_tch_at + msc_o_ sdcch_tch _at + msc_i_ sdcch_tch _at + msc_o_sdcch_at + msc_i_sdcch_at MSC controlled HO successes /ho_25 msc_o_tch_tch + msc_i_tch_tch + msc_o_ sdcch_tch + msc_i_ sdcch_tch + msc_o_sdcch + msc_i_sdcch MSC controlled HO failures = ho_22 .Neva 8/96 Version: 1.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 28 .9.ho_27 © NOKIA Customer Services / NMO / Performance Statistics / J.96 PMWG approval.0 6.ho_26 Intra cell HO attempts /ho_24 cell_tch_tch_at + cell_sdcch_tch_at + cell_sdcch_at intra cell HO successes /ho_27 cell_tch_tch + cell_sdcch_tch + cell_sdcch BSC controlled HO failures = ho_24 .: v1.ho_25 Author: J.0 6.9.96 HO attempts BSC controlled HO attempts /ho_23 bsc_o_tch_tch_at + bsc_i_tch_tch_at + bsc_o_ sdcch_tch _at + bsc_i_ sdcch_tch _at + bsc_o_sdcch_at + bsc_i_sdcch_at BSC controlled HO successes /ho_26 bsc_o_tch_tch + bsc_i_tch_tch + bsc_o_ sdcch_tch + bsc_i_ sdcch_tch + bsc_o_sdcch + bsc_i_sdcch BSC controlled HO failures = ho_23 . : 1.BSC controlled outgoing handovers Blocked / c4072 bsc_o_fail_lack Author: J.9.96 Outgoing BSC ctrl HO attempts /ho_11 bsc_o_tch_tch_at + bsc_o_sdcch_tch_at + bsc_o_sdcch_at Outgoing BSC ctrl HO successes /c4014 bsc_o_succ_ho Not allowed /c4038 bsc _o_not_allwd return to old /c4015 bsc_o_fail_ret Outgoing BSC ctrl HO failures /hof_8a = ho_11 .12.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 29 .Neva 8/96 Version: 1.96 PMWG approval.2 4. drop call /dcf_3 /c4084 bsc_o_drop_calls wrong A-if circuit type / c4096 (S5) bsc_o_unsucc_a_int_circ_type Call drops after conn_ack © NOKIA Customer Services / NMO / Performance Statistics / J.2 23.bsc_o_succ_ho Call clear /c4042 bsc_o_call_clr end of HO /c4016 bsc_o_end_of_ho end of HO BSS /c4017 bsc_o_end_ho_bss HO iterrupted and call may drop HO iterrupted and call drops BSC outgoing HO. MSC controlled outgoing handovers blocked /c 4055 msc_o_fail_lack Not allowed /c4037 msc_o_not_allwd Call clear /c4041 msc_o_call_clear return to old /c4006 msc_o_fail_ret end of HO /c4007 msc_o_end_of_ho end of HO BSS /c4008 msc_o_end_ho_bss MSC outgoing HO.: 1.PPT / 20-Jan-99 / page: 30 .97 PMWG approval.6.msc_o_succ_ho HO interrupted and call may drop adj.2 30.97 Outgoing MSC ctrl HO attempts /ho_9 msc_o_tch_tch_at + msc_o_sdcch_tch_at + msc_o_sdcch_at Outgoing MSC ctrl HO successes /c4004 msc_o_succ_ho Outgoing MSC ctrl HO failures /ho_6a =ho_9 .Neva 8/96 Version: 1.Neva / F_BSS_15. drop call /dcf_10 = ???? S7 ?? wrong A-if circuit type / c4102 (S5) msc_controlled_out_ho Author: J.cell error /c4100 (S5) msc_o_adj_cell_id_err_c © NOKIA Customer Services / NMO / Performance Statistics / J..2 29.4. PPT / 20-Jan-99 / page: 31 .BSC controlled incoming handover Author: J.failure /c4013 bsc_i_fail_BSS Drop calls /c4083 =bsc_i_drop_calls wrong A-if circuit type /c4097 (S5) bsc_i_unsucc_a_int_circ_type © NOKIA Customer Services / NMO / Performance Statistics / J.1 5.1 9.: 1.act.Neva / F_BSS_15.12.Neva 11/96 Version: 1.1296 blocking / c4011 bsc_i_fail_lack Incoming BSC ctrld HO attempts /ho_10 bsc_i_tch_tch_at + bsc_i_sdcch_tch_at + bsc_i_sdcch_at Incoming BSC ctrld HO successes /c4010 bsc_i_succ_ho connection failure /c4012 bsc_i_fail_conn Incoming BSC ctrld HO failures /hof_7a ho_10bsc_i_succ_ho end of HO /c4081 bsc_i_end_of_ho HO interrupted and call may drop radio chn.97 PMWG approval.12. Neva / F_BSS_15.96 PMWG approval.failure /c4003 HO interrupted msc_i_fail_BSS end of HO /c4080 msc_i_end_of_ho HO interrupted and call may drop wrong A-if circuit type / c4101 (S5) msc_controlled_in_ho © NOKIA Customer Services / NMO / Performance Statistics / J.12.0 23.PPT / 20-Jan-99 / page: 32 .Neva 11/96 Version: 1.MSC controlled incoming handover Author: J.: 1.96 blocking / 4001 msc_i_fail_lack Incoming HO attempts /ho_35 msc_i_tch_tch_at + msc_i_sdcch_tch_at + msc_i_sdcch_at Incoming HO successes /ho_32= msc_i_succ_ho connection failure /c4002 msc_i_fail_conn Incoming HO failures /hof_15= ho_35.11.0 4.ho_32 radio chn.act. PPT / 20-Jan-99 / page: 33 .2.ho_27 Intracell HO not allowed /c4036 cell_not_allwd Blocked /c4019 cell_fail_lack Drop calls /c4085 =cell_drop_calls Incremented if failure occurs after HO command Return to old /c4022 cell_fail_ret Radio chn.Neva / F_BSS_15.: 1.2 11.2 12/97 PMWG approval.98 Intra cell HO attempts /ho_24 cell_tch_tch_at + cell_sdcch_tch_at + cell_sdcch_at intra cell HO successes /ho_27= cell_tch_tch + cell_sdcch_tch + cell_sdcch Call clear or chn.activation failure /c4021 cell_fail_BSS HO interrupted and call may drop ???? Wrong A-interface circuit type /c4098 ho_unsucc_a_int_crct_type © NOKIA Customer Services / NMO / Performance Statistics / J.Intracell handovers Author: J.Neva 8/96 Version: 1.blocking started /c4039 cell_call_clr MS lost /c4020 cell_fail_move Intra cell HO failures /hof_9 = ho_24 . 10-15% /c4026 cause_down_lev Rapid field drop /c4087 (S4) cause_field_drop UL interference prefer.20% /c 4023 cause_up_qual Author: J.2.10-15% /c4024 cause_up_lev DL level eg.Handover causes UL quality eg.97 DL quality eg.5.PPT / 20-Jan-99 / page: 34 .Neva / F_BSS_15.0 11.Neva 9/96 Version: 1.20% /c4025 cause_down_qual Good CI /c4090 (S4) cause_good_CI MS high speed /c4106 (S6) ho_due_ms_high_speed MS slow speed /c4105 (S6) ho_due_ms_slow_speed UL level eg.: 1.98 PMWG approval. 0% /c4030 cause_interf_down Low distance /c4088 (S4) cause_low_distance Bad Rxlev on super /c4109 (S7) bad_rxlev_on_sup Pbdgt /c4032 cause_pbdgt 20-30% Directed Retry and Intelligent Directed Retry /c4079 cause_dir_retry Slow moving MS /c4091 (S5) cause_ho_due_slow_mo v_ms Switch circuit pool /c4099 (S5) switch_crcr_pool Good Rxlev on reg /c4110 (S7) good_rxlev_on_reg Umbrella /c4031 cause_umbr Distance /c4027 cause_distance Direct Access /c4128 (S7) direct_access ERFD HO Enhanced Rapid Field Drop /c4111 (S7) erfd_ho Intra cell DR (S6) --> DR counter is updated /c4079 cause_dir_retry MSC invocation (Traffic reason HO) /c4028 cause_msc_invoc OMC (Forced HO by user) /c4033 cause_omc Pre-emption /c4085 (S3) cause_pre_emption NOT IN USE Traffic /c4035 NOT IN USE cause_traffic Bad CI /c4089 (S4) cause_bad_CI Channel administration /c4034 NOT IN USE cause_ch_adm © NOKIA Customer Services / NMO / Performance Statistics / J.1 20. 0% /c4029 cause_interf_up DL interference prefer. PPT / 10-Dec-98 / page: 35 .Neva / F_BSS_15.SDCCH HO (source) UL quality /c4023 UL level /c4024 UL interference /c4029 Pbdgt /c4032 OMC (forced ho) /c4033 DL quality /c4025 DL level /c4026 DL interference /c4030 Pre-emption /c4085 Low distance /c4088 Distance /c4027 Umbrella /c4031 MSC invoc (traffic ho) /c4028 Slow moving MS /c4091 Rapid field drop /c4087 MS slow speed /c4105 MS high speed /c4106 ERFD HO /c4111 Switch circuit pool /c4099 Author: J.Pekkarinen 12/97 Version: PMWG appr.Handover Causes per Handover Types Intra Cell TCH HO UL interference OMC (forced ho) DL quality DL interference Pre-emption Low distance Distance Bad CI Good CI Bad Rxlev on super Good Rxlev on reg /c4029 /c4033 /c4025 /c4030 /c4085 /c4088 /c4027 /c4089 /c4090 /c4109 /c4110 External TCH HO (source) UL quality /c4023 UL level /c4024 UL interference /c4029 Pbdgt /c4032 OMC (forced ho) /c4033 DL quality /c4025 DL level /c4026 DL interference /c4030 Pre-emption /c4085 Low distance /c4088 Distance /c4027 Umbrella /c4031 MSC invoc (traffic ho) /c4028 Slow moving MS /c4091 Rapid field drop /c4087 MS slow speed /c4105 MS high speed /c4106 ERFD HO /c4111 Switch circuit pool /c4099 Intra Cell SDCCH HO UL interference OMC (forced ho) DL quality DL interference Pre-emption Low distance Distance Bad CI Good CI Bad Rxlev on super Good Rxlev on reg /c4029 /c4033 /c4025 /c4030 /c4085 /c4088 /c4027 /c4089 /c4090 /c4109 /c4110 Ext.: OPEN Directed Retry Intra Cell SDCCH to TCH HO Inter Cell SDCCH to TCH HO External SDCCH to TCH HO Directed retry /c4079 Inter Cell TCH HO UL quality /c4023 UL level /c4024 UL interference /c4029 OMC (forced ho) /c4033 DL quality /c4025 DL level /c4026 DL interference /c4030 Pre-emption /c4085 Low distance /c4088 Distance /c4027 Bad CI /c4089 Good CI /c4090 Direct Access /c4128 Pbdgt /c4032 Umbrella /c4031 MSC invoc (traffic ho) /c4028 Slow moving MS /c4091 Rapid field drop /c4087 MS slow speed /c4105 MS high speed /c4106 ERFD HO /c4111 Direct Access /c4128 Inter Cell SDCCH HO Handover Causes per Handover Types UL quality /c4023 UL level /c4024 UL interference /c4029 OMC (forced ho) /c4033 DL quality /c4025 DL level /c4026 DL interference /c4030 Pre-emption /c4085 Low distance /c4088 Distance /c4027 Bad CI /c4089 Good CI /c4090 Direct Access /c4128 Pbdgt /c4032 Umbrella /c4031 MSC invoc (traffic ho) /c4028 Slow moving MS /c4091 Rapid field drop /c4087 MS slow speed /c4105 MS high speed /c4106 ERFD HO /c4111 SDCCH to TCH HOs (DRs) Direct Access (DAC) (S7) Intra Cell SDCCH to TCH DAC Inter Cell SDCCH to TCH DAC Direct Access /c4128 TCH to TCH HOs SDCCH to SDCCH HOs SDCCH to TCH HOs (Direct Accesses) (Intra / Inter cell) © NOKIA Customer Services / NOS / Statistics Engineering / J. Neva / F_BSS_15. There is no automatic reallocation of the channel structure in case of overload..Paging capacity.16).16sec Sent in CCCH_Load_Ind from BTS to BSC. 1. 2 IMSI . Paging has priority if AG=0. 0. AG is sent also on PCH if there is no paging to send.9) AG = Number of Blocks Reserved for Access Grant (0.. then BSC sends an overload message to MSC.7 if SBCH used in SDCCH/8) Max. 1/2 is is an additional safety margin to give an early warning of potential paging capacity problems.. MS defines it’s group from IMSI. Buffering delay can take 2.2 if combined.paging buffer size = Paging buffer space (BTS) = 8* Nbr of Paging Groups Each paging group has separate buffer of 8 Abis commands. BSC stores the smallest value per BTS over the measurement period. If the value = 0 paging messages have been lost (paging may still be succesfull thanks to repaging) free buffers (max 8) * Nbr of Paging Groups /2 Average Paging buffer space (BSC) = ave_pch_load / res_acc_denom2 Min Paging buffer space (BSC) = min_paging_buf (counter 3018) © NOKIA Customer Services / NMO / Performance Statistics / J. Nokia MSC does not use the overload message because paging is by LAs not by BTS.2...1 18. Author: J.max. Nbr of Paging Groups = (3-AG)*MFR (combined control channel) (9-AG)*MFR (noncombined control channel) MFR = Number of Multiframes between Paging (2. >EGO.12. When 3018 is less than Paging_Buffer_Limit (it is defined in BSC. air interface (until S7) Paging and access grant channels use the same DL physical channel (Nokia uses timeslot 0) of BCCH carrier.max.: 1.1 9.96 12 slots per multiframe (combined control channel) combined capacity = 36 slots per multiframe (noncombined control channel) MBCCHC and MBCCB are combined control channels MBCCH is non-combined control channel message sent on paging or access grant channel takes 4 slots 3 messages per multiframe (combined control channel) = 12 messages per second 9 messages per multiframe (noncombined control channel) = 38 messages per second one paging message can contain ..PPT / 20-Jan-99 / page: 36 . threshold = 0.97 PMWG approval.Neva 8/96 Version: 1. default = 1. 4 TMSI Final choise is on BTS..7 if noncombined. The smaller the value.Pekkarinen 12/97 Version: 1.: 11. Paging Buffer Occupancy Each time a paging multiframe cycle ends the occupancy percentage (occupied buffer space versus maximum space) of each paging queue is calculated Maximum Paging Buffer Occupancy % /c3035 (S7) Average Paging Buffer Occupancy % /c3036/c3037 (S7) Some group specific paging queue becomes full so that a paging command cannot be stored to the buffer and the paging command is deleted. Average PCH Load on CCCH (S1) /c3008/c3009 Author: J. the greater the load on the PCH. Deleted Paging Commands /c3038 (S7) © NOKIA Customer Services / NMO / Performance Statistics / J. the greater the load on the PCH. The smaller the value.Paging buffer.PPT / 20-Jan-99 / page: 37 .0 PMWG appr.10. capacity (S7) Paging Buffer Indicates the remaining space for Paging Commands.98 NOTE the way BTS counts: free buffers (max 8) * Nbr of Paging Groups /2 Minimum Paging Buffer on CCCH /c3018 Minimum size of the paging buffer on a CCCH.Neva / F_BSS_15. 9) AG = Number of Blocks Reserved for Access Grant (0.98 PMWG approval. If AG<>0. 0.2 if combined.7 if SBCH used in SDCCH/8) © NOKIA Customer Services / NMO / Performance Statistics / J.1 21.PPT / 20-Jan-99 / page: 38 .10. Access Grant is sent also on PCH if there is no paging to send... Access Grant has priority if AG=0. Access Grant is sent on PCH with priority.. air interface (S7 and DF4/B11) 1/4 Paging and access grant channels use the same DL physical channel (Nokia uses timeslot 0) of BCCH carrier.max. 2 IMSI . Author: Markku Räsänen10/98 Version: 0.. Nbr of Paging Groups = (3-AG)*MFR (combined control channel) (9-AG)*MFR (noncombined control channel) MFR = Number of Multiframes between Paging (2. If AG=0.Neva / F_BSS_15.max.Paging capacity. 4 TMSI Final choise is on BTS. 1. If AG<> 0.: NOTE: Calculation of the amount of paging groups is the as same prior to S7/DF4 MBCCHC and MBCCB are combined control channels MBCCH is non-combined control channel 12 slots per multiframe (combined control channel) combined capacity = 36 slots per multiframe (noncombined control channel) Calculation of the amount of Paging Groups message sent on paging or access grant channel takes 4 slots 3 messages per multiframe (combined control channel) = 12 messages per second 9 messages per multiframe (noncombined control channel) = 38 messages per second one paging message can contain .7 if noncombined. paging has priority on paging blocks. 0.1 21.10.98 Paging capacity, air interface (S7 and DF4/B11) 2/4Version: PMWG approval.: Author: Markku Räsänen 10/98 Calculation of the amount of Paging Groups MS defines it’s group from IMSI Paging Group Queue Depth= MAX(ROUND(max_lead_time * 1000 / (BS-PA-MFRMS * 51 * 4.615)),1)Each paging group has a separate buffer. The depth of the buffer (Paging Group Queue Depth) depends on BS-PA-MFRMS parameter. Max_lead_time Example values of Paging Group Queue Depth = 5, not modifiable. The Queue Depth indicates how many radio interface BS-PA-MFRMS Paging Group Queue Depth Paging Requests it is possible to store in the buffer. 4 6 8 Counter N: N(New) = Counter N: N(New) = Counter N: N(Max) = N(new) > N(Max) ? 5 4 3 N(current) + 1 for TMSI paging commands N(current) + 2 + (N(current) mod 4) div 3 for IMSI paging command 4*(Paging Group Queue Depth) If N(new) > N(max), the paging command is deleted and N(current) remains the same as before Amount of deleted paging commands is reported to the BSC in CCCH_Load_ind, and BSC adds this amount to counter 3038 delete_paging_command. Each time a Paging Request is sent to the Radio Interface, N is decremented according to formula N(new) = max{N(current) - 4, 0} For each Paging Group, there is a Counter N to follow up the usage of the buffer. TMSI paging command = Abis Paging Command with TMSI identity IMSI paging command = Abis Paging Command with IMSI identity Free Space available in the Paging Group Queue for TMSI pages Free Space (TMSI)= Free Space Total (TMSI)= Paging Buffer Space = N(max) - N(current) Sum of Free Space (TMSI) in all queues Free Space Total (IMSI) = Free SpaceTotal (TMSI) / 2 min_paging_buf (counter 3018) nbr of additional paging commands with IMSI that is possible to store to the BTS. Min Paging buffer space (BSC) = Average Buffer Occupancy = The current value is sent in the the CCCH_Load_Ind from BTS to BSC. BSC stores the smallest value. When PBS < 1, BSC sends an overload message to MSC. There is no automatic reallocation of the channel structure in case of overload. Nokia MSC does not use the overload message because paging is by LAs not by BTS. For each paging group, and each paging multiframe, occupancy % = 100 *(N/N(max)) % AVERAGE(occupancy%) over all paging groups for each paging multiframe is reported from BTS to BSC in CCCH_Load_Ind Ave_paging_buffer (c3036) / res_acc_denom5 (c3037) Peak value of all Average Buffer Occupancy values in the CCCH_Load_Ind within the period is stored in BSC is a separate counter Average Buffer Occupancy ( BSC) = Maximum Buffer Occupancy Percentage = max_paging_buffer_capa (counter 3035) © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 39 Author: Jukka Pletola 10/98 Version: 0.1 PMWG approval.: Paging capacity, air interface (S7 and DF4/B11) 3/4 Counter N and the formation of Radio Interface Paging Requests from Abis Paging Commands: in this example, one Paging Group Queue is described Paging Request Type 1 15 12 13 14 10 7 5 1 2 TMSI 6 3 4 11 8 9 2 1 2 1 3 empty N 1 2 3 1 5. msg 4. msg 3. msg 2. msg 1. msg 2 3 4 4 5 5 6 7 10 7 8 11 12 9 14 10 11 16 17 18 19 12 13 14 5. msg 15 6. msg 22 6. msg 1. msg 2. msg 3. msg 4. msg Nnew = Nold + 1 Nnew = Nold + 2 + (Nold mod 4) div 3 Buffer full when Nnew > Nmax for TMSI paging command for IMSI paging command IMSI Formula for N for IMSI paging command works out as follows. Nnew = Nold +2 always but the case when the new IMSI paging command forces us to leave an "empty" spot to the Paging Request - this is the case if the paging request has earlier either 1 TMSI page and 1 IMSI page (2. Msg above), or 3 TMSI pages (5 msg above) - then Nnew = Nold+3. There is no passing lane in the paging buffers - Paging Commands are put to messages in the order in which they come to the BTS. So, in the above example, it is not possible to take mobile identity 8 from 3.msg, and put it before mobile identity 7 so that we could include it in 2.msg where there is an empty space for one TMSI mobile identity © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 40 Author: Jukka Pletola 10/98 Version: 0.1 PMWG approval.: Paging capacity, air interface (S7 and DF4/B11) 4/4 Calculation and reporting of the maximum and average buffer occupancy percentages maximum BSC stores the maximum value received during the measurement period (e.g. 60 min) c3035 max_paging_buffer_capa load-% Paging Multiframe PMF load-% PMF_average average Paging group index time One CCCH reporting period BSC adds the values received during the measurement period (e.g. 60 min) c3036 ave_paging_buffer_capa and the number of CCCH_load_ind messages c3037 res_acc_denominator_5 At the end of each Paging Multiframe Cycle (Paging Multiframe Cycle = each Paging Group sent once), the load (or occupancy) is calculated as 100*(N/N(max)) %. From this, the ABO = PMF_average = AVERAGE(occupancy-%) is calculated The ABOs are then collected over the CCCH reporting period, the average over the CCCH reporting period is calculated and the maximum selected After each reporting period, CCCH Load Ind is sent to the BSC with the deleted page, maximum and average buffer occupancy information CCCH reporting period is a HW data parameter at the BTS, the default period is 30*4*51*4.615ms = appr. 28 sec. AB O= Average Buffer Occupancy © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 41 Neva 10/96 Version: 1.98 Parameters: AG = Number of Blocks Reserved for Access Grant (0.Access Grant capacity Sent on AGCH but alternatively on PCH if there is free capacity Author: J.Neva / F_BSS_15.2 if combined.7 if noncombined. 1.:1.2.7 if SBCH used in SDCCH/8) NOTE: AG=0 can lead to unpredictable delay of AG messages BSC c3001 imm_assgn_sent Immediate Assignment BTS Buffer capacity = 8 Abis messages OR c3002 imm_ass_rej Immediate Assignment Rejected (MS is not allowed to attempt new RRestablishment until T3122 expires) c3005 del_ind_msg_rec Delete indication Returned for each deleted AGCH message Overflow of AG buffer How many times Immediate Assignment or Immediate Assignment Reject have been lost due to AG buffer overflow AG BLOCKING (blck_13) sum(del_ind_msg_rec) 100 * ----------------------------------------------------% sum(imm_assgn_rej+imm_assgn_sent) table = p_nbsc_res_acc This can include 1 .PPT / 20-Jan-99 / page: 42 .1 11.1 12/98 PMWG approval....4 Immediate Assignment Reject -Messages (from S6) ! © NOKIA Customer Services / NMO / Performance Statistics / J. 0. 7.0 page 79 ??? © NOKIA Customer Services / NMO / Performance Statistics / J.1 30.Neva 10/96 Version: 1.4.0 and DF2.in band noise from network .0 has enhanced filtering of ghosts .2..All 41 bits of training sequence used Load Peak RACH load peak_rach_load Average RACH busy ave_rach_busy/res_acc_denom3 Average RACH access ave_rach_access/res_acc_denom4 Average value over the whole measurement period (15min..S/N test (pattern) .Neva / F_BSS_15.PPT / 20-Jan-99 / page: 43 .7) defines nbr of repetition Max Number of Repetition (REP ) defines time between repetitions BTS TRX CCCH LOAD IND RACH detection triggered when level above -100dBm estimated at the RACH slot RACH has to pass .1 18.real MS at limit of sensitivity Before B9 around 10 ghosts per hour After B9 around 1 ghosts per hour ? Random Access BSC COUNTERS Capacity Nbr of RACH slots ave_rach_slot/res_acc_denom1 Author: J.58 version 4.GHOSTS = SDCCH seizures that do not lead to a useful benefit .: 1.thermodynamical type of noise .parity test BSC and OMC can know only about the RACH which passed BTS sw B9.2.energy level check with previous burst info .97 PMWG approval.6.) Absolute peak load ??? recommendations 8.97 MS RACH Max Number Retransmission (NY1) (values 1. MOC and MTC. As reported by BTS. when RACH load is too high.: 1. Other calls are refused except emergency. © NOKIA Customer Services / NMO / Performance Statistics / J. All calls are refused.PPT / 20-Jan-99 / page: 44 . when overload lower limit is occured. Upper Limit /c3040 (S7) Number of refused calls. when overload upper limit is occured.0 12/97 PMWG appr. Deleted RACH /c3041 (S7) Number of deleted RACHs on a CCCH.98 BCSU Overload Lower Limit /c3039 (S7) Number of refused calls.BCSU Overload (S7) Author: J.0 11.Neva / F_BSS_15.Pekkarinen 12/97 Version: 1.2. 12.96 Real Mobiles 9 8 Level 7 6 5 4 3 2 1 0 In-band Disturbances White noise White Noise 1 6 11 16 21 26 31 36 41 46 51 56 © NOKIA Customer Services / NMO / Performance Statistics / J.PPT / 20-Jan-99 / page: 45 61 .Neva 12/96 Version: 1.0 5.Ghosts Author: J.Neva / F_BSS_15. Neva 11/96 Version: 1.Short Messages Author: J.:1.0 4.0 25.PPT / 20-Jan-99 / page: 46 .96 PMWG approval.12.Neva / F_BSS_15.11.96 SDCCH SMS MS idle No call on SMS successful /c3028 succ_sdcch_sms_est SMS unsuccessful /c3029 unsucc _sdcch_sms_est TCH SMS MS active Call on SMS successful /c3026 succ_tch_sms_est SMS unsuccessful /c3027 unsucc _tch_sms_est © NOKIA Customer Services / NMO / Performance Statistics / J. 97 Circuit group blocking (602.Neva / F_BSS_15.csf_3a.615) avg.204.200. 50% for MB) No direct counter but affects csf_2f.PPT / 20-Jan-99 / page: 47 . M026: Max. 1% in BH Signalling link (SS7) traffic (511) MML based report Add link if traffic > 200mErl MS Paging BTS TRX Access grant BSC Abis link Aif TC MSC Paging buffer size (186. csf_1a RACH load rach_3. 130.12.216) c3005 =del_ind_msg_rec Processor unit load (184. 216). 50% for MB) Processor unit load (605.98 PMWG appr: 1.216) c2033 = sdcch_cong_time Blocked SDCCH seiz att (216) c1001 = sdcch_busy_att Blocking (204. rach_4 (188.csf_3d RACH/NOISE COLLISION RACH Aif Author: J.70% critical (avg. 216) TCH congestion time (138.Neva 11/96 Version: 1.216) .70% critical (avg.138.-2g (200. 200. 204. c2027 = tch_cong_time Blocked TCH call att (216) blck_9 Blocking (204.Congestion & blocking SDCCH congestion time (130.0 9.70% critical (avg.1 13. csf_3b. 50% for MB) © NOKIA Customer Services / NMO / Performance Statistics / J. 216) (blck_13) HLR NOTE: In MSC terminology instead of term ‘blocking’ there is term ‘call congestion) Processor unit load (606.604) M058.216) .614) avg.3.216) Alarm 2720 c3018 =min_paging_buffer ‘Telecom Link overload’ (030) messages lost (202.212) avg. 250) AG blocking (204. Queuing © NOKIA Customer Services / NMO / Performance Statistics / J.: 1.98 Call success factors SDCCH access probability SDCCH success ratio TCH access probability TCH success ratio Call success ratio Improvement Improvement by Dynamic by FACCH call setup SDCCH Allocation (S7) Improvement by Call Re-establishment Improvement by Directed Retry.Neva / F_BSS_15.Call Success Factors Author: J.1 11.1 12/97 PMWG approval.2.PPT / 20-Jan-99 / page: 48 .Neva 6/97 Version: 1. tch_call_req) .98 PMWG review.sdcch_call_re_est -b.bsc_o_sdcch_tch +c.msc_o_sdcch_tch+ b.ho_unsucc_a_int_ciric_type)) a = p_nbsc_traffic b = p_nbsc_handover OR CSF_2f good:> 95% (??) good:>97% CSF_4p sum(a.tch_call_re_est) .: 1.Neva 4/97 Version: 1.tch_call_req-a.Call Success Factors (area) Call success ratio 100* csf_1a/100 * csf_2xx/100 * csf_3d/100 * csf_4p/100 Author: J.% sum(sdcch_assign+sdcch_ho_seiz) .Neva / F_BSS_15.supplem. good:> 98% (??) CSF_2a sum(SDCCH_RADIO_FAIL+SDCCH_RF_OLD_HO+SDCCH_USER_ACT+SDCCH_BCSU_RESET+ SDCCH_NETW_ACT +SDCCH_BTS_FAIL+ SDCCH_LAPD_FAIL+SDCCH_A_IF_FAIL_CALL+SDCCH_A_IF_FAIL_OLD) 100.TCH_LAPD_FAIL+ a.TCH_USER_ACT+ a.TCH_A_IF_FAIL_OLD+ a.TCH_ABIS_FAIL_OLD+ a. Aif circuit pool handover failures +b.succ_sdcch_sms_est.tch_seiz_due_sdcch_con) .100* ---------------------------------------------------.TCH_TR_FAIL_OLD+ a.msc_controlled_in_ho +b.TCH_BTS_FAIL+ a.requests (unknown factor ) . b = p_nbsc_res_access. if drop on TCH. Note: 1) Experience has shown that A-if blocking is not included.tch_norm_seiz-msc_o_sdcch_tch-bsc_o_sdcch_tch) .PPT / 20-Jan-99 / page: 49 .TCH_RF_OLD_HO+a.ho_unsucc_a_int_ciric_type)) 100.blocked .sum(SDCCH_ABIS_CALL+SDCCH_ABIS_FAIL_OLD) All counters from p_nbsc_traffic table.9%) TCH success ratio CSF_4p SDCCH_busy_att .DR calls + sum(a.5% CSF_1a TCH SDCCH success ratio CSF_2xx TCH access probability CSF_3d (good:>99.% sum(b.(call re-establishments) 100 -100* -----------------------------------------------------------------------------.3 16.% sum(a.% sum(a. Aif circuit pool handover failures +b.TCH_ABIS_FAIL_CALL+a.bsc_i_unsucc_a_int_circ_type .sdcch_emerg_call+b.succ_seiz_term+b. Aif type mismatch or congestion -(b.tch_call_re_est) . c = p_nbsc_ho Note: 1) Includes also A-if blocking.TCH_TR_FAIL+ a.serv. FACCH call setup . 2) Includes not only calls but LUs CSF_3k sum(a.TCH_ACT_FAIL_CALL) .cell_sdcch_tch) . 2) Works for call re-est.TCH_A_IF_FAIL_CALL+ a. 3) If drop on SDCCH and call re-est.bsc_i_unsucc_a_int_circ_type .normal new calls + sum(c.98 SDCCH SDCCH access probability CSF_1a good:>99.tch_rej_due_req_ch_a_if_crc . then double count in dividor © NOKIA Customer Services / NMO / Performance Statistics / J.TCH_NETW_ACT+a.sum(a.cell_sdcch_tch) .3.sum(a.bsc_i_sdcch_tch +c.sum(b.tch_call_req-a.b.msc_controlled_in_ho +b.tch_seiz_due_sdcch_con 100-(100* ----------------------------------------) % SDCCH_seiz_att All counters from p_nbsc_traffic.100*----------------------------------------------------------------.call clears before TCH (unknown factor) + netto impact of SDCCH-SDCCH ho (unknown factor) + netto icoming DR (unknown factor) a = p_nbsc_traffic.3.(call re-establishments) a = p_nbsc_traffic b = p_nbsc_res_access c = p_nbsc_ho sum(a.sum(b.sum(a.succ_seiz_orig+b.3 16.tch_norm_seiz) .tch_rej_due_req_ch_a_if_crc . Aif type mismatch or congestion -(b.tch_norm_seiz) =100* ------------------------------------------------------------------------.sum(b.TCH_BCSU_RESET+ a.sdcch_call_re_est + b.unsucc_sdcch_sms_est) .sdcch_call_re_est + b.TCH_NORM_SEIZ) .TCH_RADIO_FAIL+a.msc_i_sdcch_tch+c. (call re-establishments) a = p_nbsc_traffic b = p_nbsc_res_access c = p_nbsc_ho a = p_nbsc_traffic.bsc_i_unsucc_a_int_circ_type .bsc_i_tch_tch) .TCH_LAPD_FAIL+ a.call clears before TCH .bsc_o_sdcch_tch +c. FACCH call setup + sum(c. then double count in dividor © NOKIA Customer Services / NMO / Performance Statistics / J.(all TCH seiz. Note: 1) Experience has shown that A-if blocking is NOT included.: 1.sdcch_emerg_call) .TCH_USER_ACT+ a.tch_seiz_due_sdcch_con) .3 16.Neva / F_BSS_15.bsc_i_sdcch_tch +c.(calls.sum(a.TCH_TR_FAIL_OLD+ a.msc_i_sdcch + c.for new call) -------------------------------------------------------------------.sum(a.c.msc_o_sdcch .tch_norm_seiz) .succ_seiz_term+b.unsucc_sdcch_sms_est) .(netto SDCCH HO in) -c.TCH_A_IF_FAIL_CALL+ a. Aif circuit pool handover failures +b.3 16.sum(b.PPT / 20-Jan-99 / page: 50 .100* ---------------------------------------------------------.3.serv.bsc_o_sdcch) .supplem.msc_controlled_in_ho +b.(normal calls) + sum(c.sdcch_call_re_est + b.msc_controlled_in_ho +b.succ_sdcch_sms_est + b.TCH_RADIO_FAIL+a.TCH_RF_OLD_HO+a.cell_sdcch_tch) .(unknown factor) .msc_i_sdcch_tch+c.sum(a.% sum(a. on TCH it is correct. Aif type mismatch or congestion -(b.3.TCH_ABIS_FAIL_CALL+a.tch_call_req-a.(sms attempts) + sum(c. requests .bsc.sum(b.TCH_A_IF_FAIL_OLD+ a.cell_sdcch_tch) .bsc_i_sdcch . c = p_nbsc_ho Note: Includes also A-if blocking.ho_unsucc_a_int_ciric_type)) a = p_nbsc_traffic b = p_nbsc_handover OR CSF_2g sum(a.sum(b. requests .sms.(TCH-TCH Ho in) . 2) Includes not only calls but LUs sum(a.98 PMWG review.tch_call_req-a.tch_norm_seiz) . 3) If drop on SDCCH and call re-est.succ_seiz_orig +b.TCH_ACT_FAIL_CALL) .% sum(a.sum(b.tch_call_re_est) .(DR calls) + sum(a.tch_call_req) .ho_unsucc_a_int_ciric_type)) 100.tch_rej_due_req_ch_a_if_crc .(unknown factor) =100* CSF_4r sum(a.tch_seiz_due_sdcch_con 100-(100* ----------------------------------------) % SDCCH_seiz_att All counters from p_nbsc_traffic. Aif type mismatch or congestion -(b.TCH_BTS_FAIL+ a. occurs already on SDCCH the formula is not correct but if re-est. If call re-establ.CSF_1a SDCCH_busy_att .sdcch_call_re_est + b.tch_norm_seiz) .(unknown factor) .(unknown how big part calls .tch_call_re_est) .% sum(b.tch_rej_due_req_ch_a_if_crc .(DR and air itf blocking) .serv. ss reqs) .sum(SDCCH_ABIS_CALL+SDCCH_ABIS_FAIL_OLD) All counters from p_nbsc_traffic table.sdcch_call_re_est+b.msc_o_sdcch_tch+ b.msc_i_tch_tch+c. b = p_nbsc_res_access.Neva 4/97 Version: 1.tch_norm_seiz) .supplem.bsc_i_unsucc_a_int_circ_type .% sum(sdcch_assign+sdcch_ho_seiz) .100*----------------------------------------------------------------.TCH_ABIS_FAIL_OLD+ a.98 Call success ratio 100* csf_1a/100 * csf_2xx/100 * csf_3d/100 * csf_4r/100 SDCCH access probability CSF_1a SDCCH success ratio CSF_2xx TCH access probability CSF_3d TCH success ratio CSF_4r CSF_3k CSF_2a sum(SDCCH_RADIO_FAIL+SDCCH_RF_OLD_HO+SDCCH_USER_ACT+SDCCH_BCSU_RESET+ SDCCH_NETW_ACT +SDCCH_BTS_FAIL+ SDCCH_LAPD_FAIL+SDCCH_A_IF_FAIL_CALL+SDCCH_A_IF_FAIL_OLD) 100.TCH_TR_FAIL+ a. Aif circuit pool handover failures +b.TCH_NETW_ACT+a. Call Success Factors (BTS) Author: J.TCH_BCSU_RESET+ a.(call re-establishments) 100 -100* -----------------------------------------------------------------------------. 4 12.4 PMWG review.msc_o_sdcch_tch+ b.Neva 4/97 Version: 1.unsrv_qd_call_att).50 99. BEFORE DR.tch_call_req) .% sum(a.50 97.ho_unsucc_a_int_ciric_type)) a = p_nbsc_traffic.sum(a. b=p_nbsc_ho.XX1 -a.tch_rej_due_req_ch_a_if_crc .calls that succeeded via queuing .tch_call_req .tch_call_req) .1999 sum(a. b = p_nbsc_ho tue 100.50 96.msc_controlled_in_ho +b. Aif circuit pool handover failures +b.50 Series1 Series2 Series3 S3 S1 sun fri wed mon sat thu tue sun fri wed Queuing and DR work in parallel. (CSF_3a) sum(a. Aif circuit pool handover failures +b. © NOKIA Customer Services / NMO / Performance Statistics / J.msc_controlled_in_ho +b.sum(b.bsc_i_unsucc_a_int_circ_type .sum(a.tch_rej_due_req_ch_a_if_crc .sum(a.tch_norm_seiz).calls that could be blocked . Aif type mismatch or congestion -(b.: 1. BEFORE DR&Q.Neva / F_BSS_15.% sum(a.a.tch_rej_due_req_ch_a_if_crc . TCH access Author: J.msc_controlled_in_ho +b.tch_call_req-a.00 97.msc_controlled_in_ho +b.tch_rej_due_req_ch_a_if_crc . Call is taken out from que of cell A when the cell list is created and HO is attempted to cell B.tch_call_req) .ho_unsucc_a_int_ciric_type)) 100-100*------------------------------------------.1.PPT / 20-Jan-99 / page: 51 mon .ho_unsucc_a_int_ciric_type)) 100-100* ------------------------------------.tch_norm_seiz) + sum(a. Aif type mismatch or congestion -(b.calls that are saved by DR 100.bsc_i_unsucc_a_int_circ_type . Aif circuit pool handover failures +b.cell_sdcch_tch) .tch_rej_due_req_ch_a_if_crc .00 99.tch_norm_seiz) . This means that the HO still may fail after call is taken out from queue.bsc_o_sdcch_tch +c. REAL.00 98. Aif type mismatch or congestion -(b.msc_controlled_in_ho +b.tch_qd_call_att .100* -------------------------------------------. Aif circuit pool handover failures +b.msc_controlled_in_ho +b.ho_unsucc_a_int_ciric_type)) . b = p_nbsc_ho TCH ACCESS PROBABILITY. Aif type mismatch or congestion -(b.a. If queuing is succeeded then DR is not tried.00 95.00 96. Aif circuit pool handover failures +b.tch_rej_due_req_ch_a_if_crc . (CSF_3d) sum(a.bsc_i_unsucc_a_int_circ_type .bsc_i_unsucc_a_int_circ_type . XX1=attempts taken from queue to DR (unknown) Note error due to XX1!! TCH ACCESS PROBABILITY.bsc_i_unsucc_a_int_circ_type . Aif type mismatch or congestion -(b. Aif type mismatch or congestion -(b.50 98.sum(a.tch_call_req . Aif circuit pool handover failures +b. (CSF_3j) Call Success Factors (area).% sum(a.ho_unsucc_a_int_ciric_type)) a = p_nbsc_traffic .sum(a.bsc_i_unsucc_a_int_circ_type .sum(a.ho_unsucc_a_int_ciric_type)) a = p_nbsc_traffic.TCH ACCESS TCH ACCESS PROBABILITY. Call Success Factors (area).sum(b. b = p_nbsc_res_access.00 94.TCH_USER_ACT+ a. call re-establishments a = p_nbsc_traffic.TCH_A_IF_FAIL_CALL+ a.TCH_TR_FAIL+ a.sdcch_call_re_est + b.bsc_i_sdcch_tch +c.TCH_RADIO_FAIL+a.% sum(a. c = p_nbsc_ho .tch_seiz_due_sdcch_con) .50 95.tch_seiz_due_sdcch_con) .Neva / F_BSS_15.tch_norm_seiz) .Neva 4/97 Version: 1.TCH_BTS_FAIL+ a.TCH_USER_ACT+ a.(normal calls) + sum(c. b = p_nbsc_res_access.msc_i_sdcch_tch+c.TCH_RADIO_FAIL+a. REAL (CSF_4p) sum(a.TCH_TR_FAIL_OLD+ a.TCH_ACT_FAIL_CALL) .TCH_TR_FAIL_OLD+ a.cell_sdcch_tch) .TCH_RF_OLD_HO+a.00 97.TCH_NETW_ACT+a.TCH_ACT_FAIL_CALL) 100 -100* -----------------------------------------------------------------------------.3 26.00 Series1 Series2 wed mon wed © NOKIA Customer Services / NMO / Performance Statistics / J.50 98. call re-establishments 100 -100* -----------------------------------------------------------------------------.TCH_A_IF_FAIL_CALL+ a.TCH_A_IF_FAIL_OLD+ a.DR calls 99.TCH_LAPD_FAIL+ a.00 96.TCH_TR_FAIL+ a.00 95.TCH_NETW_ACT+a.TCH_ABIS_FAIL_OLD+ a.bsc_i_sdcch_tch +c.TCH_ABIS_FAIL_CALL+a.00 98.TCH_LAPD_FAIL+ a.TCH_NORM_SEIZ) .TCH_BCSU_RESET+ a.3 PMWG review.(DR calls) + sum(a.50 94. TCH success Author: J.TCH_RF_OLD_HO+a.98 TCH SUCCESS TCH SUCCESS RATIO.50 96.TCH_ABIS_FAIL_CALL+a.TCH_A_IF_FAIL_OLD+ a.TCH_BTS_FAIL+ a.TCH_ABIS_FAIL_OLD+ a.50 97.tch_call_re_est).TCH_BCSU_RESET+ a.msc_i_sdcch_tch+c.calls started directly in the cell + sum(c.5. REAL (CSF_4o) sum(a.sum(b.bsc_i_sdcch_tch +c.: 1.c = p_nbsc_ho Improvement by Call re-establishment TCH SUCCESS RATIO.FACCH call setup calls .sdcch_call_re_est + b.PPT / 20-Jan-99 / page: 52 mon fri tue thu sun tue sun sat fri .tch_call_re_est) .cell_sdcch_tch +c.% sum(a. FACCH call setup calls a = p_nbsc_traffic.cell_sdcch_tch) + sum(a. 2 12/98 PMWG review.: 1. (CSF_x) SDCCH_busy_att 100*(1. SDCCH Author: J.--------------) % SDCCH_seiz_att SDCCH ACCESS SDCCH ACCESS PROBABILITY. BEFORE FACCH call setup.98 SDCCH ACCESS SDCCH ACCESS PROBABILITY.Neva / F_BSS_15.tch_seiz_due_sdcch_con 100-(100* ----------------------------------------) % SDCCH_seiz_att a = p_nbsc_traffic a = p_nbsc_traffic SUCCESS DYNAMIC SDCCH RECONF ATTEMPT /c1154 (S7) dyn_sdcch_reconf_att UNSUCC IMM ASSIGN SDCCH ATTEMPT /c1155 (S7) unsucc_imm_ass_sdc ch_att Counters for Dynamic SDCCH Allocation UNSUCC © NOKIA Customer Services / NMO / Performance Statistics / J. BEFORE DYNAMIC SDCCH ALLOCATION.2 11.Neva 6/97 Version: 1.--------------) % SDCCH_seiz_att a = p_nbsc_traffic This is smaller after Dynamic SDCCH Conf.--------------) % SDCCH_seiz_att SDCCH ACCESS PROBABILITY.PPT / 20-Jan-99 / page: 53 . (CSF_1a) SDCCH_busy_att. AFTER DYNAMIC SDCCH ALLOCATION.Call Success Factors (area). (CSF_1) SDCCH_busy_att 100*(1. Feature (S7) is activated ! Imrovement by Dynamic SDCCH Allocation a = p_nbsc_traffic Imrovement by FACCH call setup SDCCH ACCESS PROBABILITY.2.(CSF_x) SDCCH_busy_att 100*(1. AFTER FACCH call setup. Conversation Success (area) Author: J.conver_started) .: 1. Note: applicable on large are where no MSC controlled Hos over areal border.PPT / 20-Jan-99 / page: 54 .% sum(b.Neva 6/97 Version: 1.0 9. NOT applicable on BTS level.dropped_calls) -------------------------------------------------.98 PMWG review.12.sum(a.97 SDCCH SDCCH access SDCCH success TCH TCH access Cell A TCH success Handover triggered when call started TCH TCH access TCH success Cell B triggered if inter BSC HO Drop call conversation_started Dropped conversation ratio dcr_5a (connect_ack message) dropped_call 100* sum(b.Neva / F_BSS_15.msc_i_tch_tch) b = p_nbsc_service a = p_nbsc_ho.1 27. © NOKIA Customer Services / NMO / Performance Statistics / J.1. : UNDER WORK High Speed Circuit Swithed Data (S7 Feature) One of these triggered SDCCH SDCCH REQUESTS /c1000 sdcch_seiz_ att SEIZURES FOR CALLS .Pekkarinen 12/97 Version: PMWG appr.Neva / F_BSS_15.PPT / 20-Jan-99 / page: 55 .SMS) /c3013 succ_seiz_orig MTC (incl.Author: J. LU s AND IMSI DETACHES /c1007 sdcch_assign MOC (incl.SMS) /c3012 ?????? succ_seiz_term TCH Request Assignment Request message received to the BSC from the MSC TCH Request HSCSD TCH REQUESTS /c1156 HSCSD SUCC TCH REQ /c1157 HSCSD REQ FOR CALL SETUP /c1160 OR HSCSD TRANSP TCH REQ /c1158 OR HSCSD SUCC TRANSP TCH REQ /c1159 HSCSD SUCC TCH SEIZ FOR CALL SETUP /c1162 CONVERSATION IF Call Dropped HSCSD CONNECTION RELEASES DUE TO FAIL /c1164 © NOKIA Customer Services / NMO / Performance Statistics / J. PPT / 20-Jan-99 / page: 56 .: UNDER WORK High Speed Circuit Swithed Data Intra Cell HO (S7 Feature) SOURCE INTRA CELL HO SUCCESS /c4018 INTRA CELL HSCSD ATTEMPT /c4124 IF Upgrade or Downgrade INTRA CELL HSCSD SUCC DEC /c4127 INTRA CELL HSCSD SUCCESS /c4125 HSCSD TCH REQ FOR HO /c1161 HSCSD SUCC TCH SEIZ FOR HO /c1163 INTRA CELL HSCSD SUCC INC /c4126 © NOKIA Customer Services / NMO / Performance Statistics / J.Author: J.Pekkarinen 12/97 Version: PMWG appr.Neva / F_BSS_15. PPT / 20-Jan-99 / page: 57 .Neva / F_BSS_15.: UNDER WORK INTER CELL OUTGOING HSCSD ATTEMPT /c4118 INTER CELL OUTGOING SUCC HSCSD HO /c4119 BSC Inter Cell Handover TARGET INTER CELL INCOMING HSCSD ATTEMPT /c4120 INTER CELL INCOMING SUCC HO /c4010 INTER CELL INCOMING SUCC HSCSD HO /c4121 HSCSD SUCC TCH SEIZ FOR HO /c1163 IF Upgrade or Downgrade INTER CELL HSCSD SUCC DEC /c4123 HSCSD TCH REQ FOR HO /c1161 INTER CELL HSCSD SUCC INC /c4122 © NOKIA Customer Services / NMO / Performance Statistics / J.Pekkarinen 12/97 Version: PMWG appr.High Speed Circuit Swithed Data HO (S7 Feature) SOURCE INTER CELL OUTGOING SUCC HO /c4014 Author: J. : UNDER WORK High Speed Circuit Swithed Data HO (S7 Feature) EXTERNAL OUTGOING SUCC HO /c4004 SOURCE EXTERNAL OUTGOING HSCSD ATTEMPT /c4112 EXTERNAL OUTGOING SUCC HSCSD HO /c4113 External Handover TARGET EXTERNAL INCOMING HSCSD ATTEMPT /c4114 EXTERNAL INCOMING SUCC HO /c4000 EXTERNAL INCOMING SUCC HSCSD HO /c4115 HSCSD SUCC TCH SEIZ FOR HO /c1163 IF Upgrade or Downgrade EXTERNAL HSCSD SUCC DEC /c4117 HSCSD TCH REQ FOR HO /c1161 EXTERNAL HSCSD SUCC INC /c4116 © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.Pekkarinen 12/97 Version: PMWG appr.PPT / 20-Jan-99 / page: 58 .Author: J. LU.2.Dynamic SDCCH allocation (S7 feature) RACH on CCCH /c3004 ch_req_msg_rec Author: J.98 •In case of the congestion in SDCCH.0 PMWG appr.Pekkarinen 12/97 Version: 1.PPT / 20-Jan-99 / .SS /c1007 sdcch_assign TCH page: 59 © NOKIA Customer Services / NMO / Performance Statistics / J.Neva / F_BSS_15.: 11. one free traffic channel can be changed dynamically to SDCCH/8 •In IUO case. SDCCH/8 from the regular TRX •FACCH call setup is used only in true SDCCH congestion when not any dynamic SDCCH more is possible to be configurated on TCH TCH TCH TCH TCH TCH TCH TCH • SDCCH REQUESTS /c1000 sdcch_seiz_att When SDDCH/8 is not needed anymore it is changed dynamically back to TCH TCH TCH TCH TCH TCH TCH TCH TCH SDCCH TCH /8 TCH TCH TCH TCH TCH TCH SDCCH TCH /8 Reconfiguration attempt from TCH to SDCCH DYNAMIC SDCCH RECONF ATTEMPT /c1154 (S7) dyn_sdcch_reconf_att UNSUCC IMM ASSIGN SDCCH ATTEMPT /c1155 (S7) unsucc_imm_ass_sdcch_att TCH TCH TCH TCH TCH TCH FAILS SDCCH BUSY ATTEMPT /c1001 sdcch_busy_att NONE OF COUNTER IS UPDATED !!! FACCH Call Setup ASSIGNMENTS FOR CALLS. 0 PMWG review: 1.6 .2%) (BER 3.4 .1.98 Good slightly degradiated degradiated useless Results are available per TRX in p_nbsc_rx_qual or p_nbsc_rx_statistics.Quality UL and DL are sampled every 480ms.2 .3.PPT / 20-Jan-99 / page: 60 .0.Neva / F_BSS_15.12.2 .4%) (BER 0.Neva 3. © NOKIA Customer Services / NMO / Performance Statistics / J.4 .08) ****************** (BER < 0.8%) (BER 0.4%) (BER 6. Impact of UL DTX: An investigation showed that UL DTX makes UL quality to show worse.0. The impact was about one 1% unit (1% of samples more in classes 6 and 7). 12.6.2%) (BER 0.8%) Author: J. Every sample is ranked to a quality class: Class corresponds to BER: Class ***** qua 0 qua 1 qua 2 qua 3 qua 4 qua 5 qua 6 qua 7 BER (GSM 05.8%) (BER >12.10. When investigated with field tests no real degradiation of quality could be found.10.8 .98 Version: 1.0.6%) (BER 1. BER is not good for measuring audio quality. Hopping with 4 or + TRX/cell Hopping with 2-3 TRX/cell Not hopping 0% 0 1 2 3 4 5 6 7 Note: TRX numbers for BB FH only.1 1. Note that . i.1 PMWG appr. In RF FH case the TRX numbers = MA list lenghts.Neva / F_BSS_15.FH effect on quality Quality classes evolution with FH Author: 5/98 Version: 1.classes 0-5 do not cause audible problems . more TRXs (or frequencies) in a hopping sequence usually means the reuse has got tighter and soon this will start to introduce more errors than you are saving. FER would be better but is not available Experiments in hopping network have shown that even if quality 5-6 share (BER) increased FER did not.PPT / 20-Jan-99 / page: 61 .e. MS user perceived quality is not worse.98 100 % The advantage comes in that the speech coder works much better under the single burst errors you get with hopping. With more freqs these get spaced enough that the coding can handle all the errors. © NOKIA Customer Services / NMO / Performance Statistics / J.7. This picture is a rough example of the trend and should not be shown to customers as an offical statement.: 1. However.
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